Commit | Line | Data |
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1ab256cb | 1 | /* Buffer manipulation primitives for GNU Emacs. |
0b5538bd TTN |
2 | Copyright (C) 1985, 1986, 1987, 1988, 1989, 1993, 1994, |
3 | 1995, 1997, 1998, 1999, 2000, 2001, 2002, | |
aaef169d | 4 | 2003, 2004, 2005, 2006 Free Software Foundation, Inc. |
1ab256cb RM |
5 | |
6 | This file is part of GNU Emacs. | |
7 | ||
8 | GNU Emacs is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
c922bc55 | 10 | the Free Software Foundation; either version 2, or (at your option) |
1ab256cb RM |
11 | any later version. |
12 | ||
13 | GNU Emacs is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with GNU Emacs; see the file COPYING. If not, write to | |
4fc5845f LK |
20 | the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
21 | Boston, MA 02110-1301, USA. */ | |
1ab256cb | 22 | |
68c45bf0 | 23 | #include <config.h> |
1ab256cb | 24 | |
2381d133 JB |
25 | #include <sys/types.h> |
26 | #include <sys/stat.h> | |
1ab256cb | 27 | #include <sys/param.h> |
9dde47f5 | 28 | #include <errno.h> |
15e7873a | 29 | #include <stdio.h> |
9dde47f5 | 30 | |
2538fae4 | 31 | #ifndef USE_CRT_DLL |
9dde47f5 | 32 | extern int errno; |
2538fae4 | 33 | #endif |
1ab256cb | 34 | |
1ab256cb | 35 | |
dfcf069d AS |
36 | #ifdef HAVE_UNISTD_H |
37 | #include <unistd.h> | |
38 | #endif | |
7ee72033 | 39 | |
1ab256cb | 40 | #include "lisp.h" |
21cf4cf8 | 41 | #include "intervals.h" |
1ab256cb RM |
42 | #include "window.h" |
43 | #include "commands.h" | |
44 | #include "buffer.h" | |
3b06f880 | 45 | #include "charset.h" |
28e969dd | 46 | #include "region-cache.h" |
1ab256cb | 47 | #include "indent.h" |
d014bf88 | 48 | #include "blockinput.h" |
2538fae4 | 49 | #include "keyboard.h" |
e35f6ff7 | 50 | #include "keymap.h" |
08460cd4 | 51 | #include "frame.h" |
1ab256cb RM |
52 | |
53 | struct buffer *current_buffer; /* the current buffer */ | |
54 | ||
55 | /* First buffer in chain of all buffers (in reverse order of creation). | |
56 | Threaded through ->next. */ | |
57 | ||
58 | struct buffer *all_buffers; | |
59 | ||
60 | /* This structure holds the default values of the buffer-local variables | |
61 | defined with DEFVAR_PER_BUFFER, that have special slots in each buffer. | |
62 | The default value occupies the same slot in this structure | |
63 | as an individual buffer's value occupies in that buffer. | |
64 | Setting the default value also goes through the alist of buffers | |
65 | and stores into each buffer that does not say it has a local value. */ | |
66 | ||
d4f8198b | 67 | DECL_ALIGN (struct buffer, buffer_defaults); |
1ab256cb RM |
68 | |
69 | /* A Lisp_Object pointer to the above, used for staticpro */ | |
70 | ||
71 | static Lisp_Object Vbuffer_defaults; | |
72 | ||
73 | /* This structure marks which slots in a buffer have corresponding | |
74 | default values in buffer_defaults. | |
75 | Each such slot has a nonzero value in this structure. | |
76 | The value has only one nonzero bit. | |
77 | ||
78 | When a buffer has its own local value for a slot, | |
7c02e886 GM |
79 | the entry for that slot (found in the same slot in this structure) |
80 | is turned on in the buffer's local_flags array. | |
1ab256cb RM |
81 | |
82 | If a slot in this structure is -1, then even though there may | |
83 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
84 | and the corresponding slot in buffer_defaults is not used. | |
85 | ||
86 | If a slot is -2, then there is no DEFVAR_PER_BUFFER for it, | |
87 | but there is a default value which is copied into each buffer. | |
88 | ||
1ab256cb RM |
89 | If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is |
90 | zero, that is a bug */ | |
91 | ||
92 | struct buffer buffer_local_flags; | |
93 | ||
94 | /* This structure holds the names of symbols whose values may be | |
95 | buffer-local. It is indexed and accessed in the same way as the above. */ | |
96 | ||
d4f8198b SM |
97 | DECL_ALIGN (struct buffer, buffer_local_symbols); |
98 | ||
1ab256cb RM |
99 | /* A Lisp_Object pointer to the above, used for staticpro */ |
100 | static Lisp_Object Vbuffer_local_symbols; | |
101 | ||
0fa3ba92 JB |
102 | /* This structure holds the required types for the values in the |
103 | buffer-local slots. If a slot contains Qnil, then the | |
104 | corresponding buffer slot may contain a value of any type. If a | |
105 | slot contains an integer, then prospective values' tags must be | |
1bf08baf KH |
106 | equal to that integer (except nil is always allowed). |
107 | When a tag does not match, the function | |
108 | buffer_slot_type_mismatch will signal an error. | |
109 | ||
110 | If a slot here contains -1, the corresponding variable is read-only. */ | |
0fa3ba92 JB |
111 | struct buffer buffer_local_types; |
112 | ||
13de9290 RS |
113 | /* Flags indicating which built-in buffer-local variables |
114 | are permanent locals. */ | |
7313acd0 | 115 | static char buffer_permanent_local_flags[MAX_PER_BUFFER_VARS]; |
7c02e886 GM |
116 | |
117 | /* Number of per-buffer variables used. */ | |
118 | ||
7313acd0 | 119 | int last_per_buffer_idx; |
13de9290 | 120 | |
1ab256cb | 121 | Lisp_Object Fset_buffer (); |
01050cb5 | 122 | void set_buffer_internal (); |
c7aa5005 | 123 | void set_buffer_internal_1 (); |
173f2a64 | 124 | static void call_overlay_mod_hooks (); |
2f3f993b | 125 | static void swap_out_buffer_local_variables (); |
13de9290 | 126 | static void reset_buffer_local_variables (); |
1ab256cb RM |
127 | |
128 | /* Alist of all buffer names vs the buffers. */ | |
129 | /* This used to be a variable, but is no longer, | |
130 | to prevent lossage due to user rplac'ing this alist or its elements. */ | |
131 | Lisp_Object Vbuffer_alist; | |
132 | ||
133 | /* Functions to call before and after each text change. */ | |
5f079267 RS |
134 | Lisp_Object Vbefore_change_functions; |
135 | Lisp_Object Vafter_change_functions; | |
1ab256cb | 136 | |
c48f61ef RS |
137 | Lisp_Object Vtransient_mark_mode; |
138 | ||
a96b68f1 RS |
139 | /* t means ignore all read-only text properties. |
140 | A list means ignore such a property if its value is a member of the list. | |
141 | Any non-nil value means ignore buffer-read-only. */ | |
142 | Lisp_Object Vinhibit_read_only; | |
143 | ||
dcdffbf6 RS |
144 | /* List of functions to call that can query about killing a buffer. |
145 | If any of these functions returns nil, we don't kill it. */ | |
146 | Lisp_Object Vkill_buffer_query_functions; | |
5b20caf0 | 147 | Lisp_Object Qkill_buffer_query_functions; |
dcdffbf6 | 148 | |
43ed3b8d CY |
149 | /* Hook run before changing a major mode. */ |
150 | Lisp_Object Vchange_major_mode_hook, Qchange_major_mode_hook; | |
151 | ||
dbc4e1c1 JB |
152 | /* List of functions to call before changing an unmodified buffer. */ |
153 | Lisp_Object Vfirst_change_hook; | |
22378665 | 154 | |
dbc4e1c1 | 155 | Lisp_Object Qfirst_change_hook; |
22378665 RS |
156 | Lisp_Object Qbefore_change_functions; |
157 | Lisp_Object Qafter_change_functions; | |
48265e61 | 158 | Lisp_Object Qucs_set_table_for_input; |
1ab256cb | 159 | |
7775635d KH |
160 | /* If nonzero, all modification hooks are suppressed. */ |
161 | int inhibit_modification_hooks; | |
162 | ||
1ab256cb RM |
163 | Lisp_Object Qfundamental_mode, Qmode_class, Qpermanent_local; |
164 | ||
165 | Lisp_Object Qprotected_field; | |
166 | ||
167 | Lisp_Object QSFundamental; /* A string "Fundamental" */ | |
168 | ||
169 | Lisp_Object Qkill_buffer_hook; | |
170 | ||
5fe0b67e RS |
171 | Lisp_Object Qget_file_buffer; |
172 | ||
52f8ec73 JB |
173 | Lisp_Object Qoverlayp; |
174 | ||
bbbe9545 | 175 | Lisp_Object Qpriority, Qwindow, Qevaporate, Qbefore_string, Qafter_string; |
5985d248 | 176 | |
294d215f RS |
177 | Lisp_Object Qmodification_hooks; |
178 | Lisp_Object Qinsert_in_front_hooks; | |
179 | Lisp_Object Qinsert_behind_hooks; | |
180 | ||
b86af064 GM |
181 | static void alloc_buffer_text P_ ((struct buffer *, size_t)); |
182 | static void free_buffer_text P_ ((struct buffer *b)); | |
2410d73a | 183 | static struct Lisp_Overlay * copy_overlays P_ ((struct buffer *, struct Lisp_Overlay *)); |
2e293742 | 184 | static void modify_overlay P_ ((struct buffer *, EMACS_INT, EMACS_INT)); |
e1688f54 | 185 | static Lisp_Object buffer_lisp_local_variables P_ ((struct buffer *)); |
b86af064 GM |
186 | |
187 | ||
1ab256cb RM |
188 | /* For debugging; temporary. See set_buffer_internal. */ |
189 | /* Lisp_Object Qlisp_mode, Vcheck_symbol; */ | |
190 | ||
01136e9b | 191 | void |
1ab256cb RM |
192 | nsberror (spec) |
193 | Lisp_Object spec; | |
194 | { | |
a7a60ce9 | 195 | if (STRINGP (spec)) |
d5db4077 | 196 | error ("No buffer named %s", SDATA (spec)); |
1ab256cb RM |
197 | error ("Invalid buffer argument"); |
198 | } | |
199 | \f | |
0dc88e60 | 200 | DEFUN ("buffer-live-p", Fbuffer_live_p, Sbuffer_live_p, 1, 1, 0, |
7ee72033 MB |
201 | doc: /* Return non-nil if OBJECT is a buffer which has not been killed. |
202 | Value is nil if OBJECT is not a buffer or if it has been killed. */) | |
203 | (object) | |
0dc88e60 RS |
204 | Lisp_Object object; |
205 | { | |
206 | return ((BUFFERP (object) && ! NILP (XBUFFER (object)->name)) | |
207 | ? Qt : Qnil); | |
208 | } | |
209 | ||
08460cd4 | 210 | DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 1, 0, |
7ee72033 | 211 | doc: /* Return a list of all existing live buffers. |
aef466d5 RS |
212 | If the optional arg FRAME is a frame, we return the buffer list |
213 | in the proper order for that frame: the buffers in FRAME's `buffer-list' | |
214 | frame parameter come first, followed by the rest of the buffers. */) | |
7ee72033 | 215 | (frame) |
08460cd4 | 216 | Lisp_Object frame; |
1ab256cb | 217 | { |
08460cd4 RS |
218 | Lisp_Object framelist, general; |
219 | general = Fmapcar (Qcdr, Vbuffer_alist); | |
220 | ||
221 | if (FRAMEP (frame)) | |
222 | { | |
223 | Lisp_Object tail; | |
224 | ||
b7826503 | 225 | CHECK_FRAME (frame); |
08460cd4 RS |
226 | |
227 | framelist = Fcopy_sequence (XFRAME (frame)->buffer_list); | |
228 | ||
229 | /* Remove from GENERAL any buffer that duplicates one in FRAMELIST. */ | |
230 | tail = framelist; | |
231 | while (! NILP (tail)) | |
232 | { | |
7539e11f KR |
233 | general = Fdelq (XCAR (tail), general); |
234 | tail = XCDR (tail); | |
08460cd4 RS |
235 | } |
236 | return nconc2 (framelist, general); | |
237 | } | |
238 | ||
239 | return general; | |
1ab256cb RM |
240 | } |
241 | ||
04ae1b48 RS |
242 | /* Like Fassoc, but use Fstring_equal to compare |
243 | (which ignores text properties), | |
244 | and don't ever QUIT. */ | |
245 | ||
246 | static Lisp_Object | |
247 | assoc_ignore_text_properties (key, list) | |
248 | register Lisp_Object key; | |
249 | Lisp_Object list; | |
250 | { | |
251 | register Lisp_Object tail; | |
6d70a280 | 252 | for (tail = list; CONSP (tail); tail = XCDR (tail)) |
04ae1b48 RS |
253 | { |
254 | register Lisp_Object elt, tem; | |
6d70a280 | 255 | elt = XCAR (tail); |
04ae1b48 RS |
256 | tem = Fstring_equal (Fcar (elt), key); |
257 | if (!NILP (tem)) | |
258 | return elt; | |
259 | } | |
260 | return Qnil; | |
261 | } | |
262 | ||
1ab256cb | 263 | DEFUN ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0, |
7ee72033 | 264 | doc: /* Return the buffer named NAME (a string). |
018ba359 | 265 | If there is no live buffer named NAME, return nil. |
7ee72033 MB |
266 | NAME may also be a buffer; if so, the value is that buffer. */) |
267 | (name) | |
1ab256cb RM |
268 | register Lisp_Object name; |
269 | { | |
a7a60ce9 | 270 | if (BUFFERP (name)) |
1ab256cb | 271 | return name; |
b7826503 | 272 | CHECK_STRING (name); |
1ab256cb | 273 | |
04ae1b48 | 274 | return Fcdr (assoc_ignore_text_properties (name, Vbuffer_alist)); |
1ab256cb RM |
275 | } |
276 | ||
277 | DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0, | |
7ee72033 | 278 | doc: /* Return the buffer visiting file FILENAME (a string). |
018ba359 PJ |
279 | The buffer's `buffer-file-name' must match exactly the expansion of FILENAME. |
280 | If there is no such live buffer, return nil. | |
7ee72033 MB |
281 | See also `find-buffer-visiting'. */) |
282 | (filename) | |
1ab256cb RM |
283 | register Lisp_Object filename; |
284 | { | |
285 | register Lisp_Object tail, buf, tem; | |
5fe0b67e RS |
286 | Lisp_Object handler; |
287 | ||
b7826503 | 288 | CHECK_STRING (filename); |
1ab256cb RM |
289 | filename = Fexpand_file_name (filename, Qnil); |
290 | ||
5fe0b67e RS |
291 | /* If the file name has special constructs in it, |
292 | call the corresponding file handler. */ | |
a617e913 | 293 | handler = Ffind_file_name_handler (filename, Qget_file_buffer); |
5fe0b67e RS |
294 | if (!NILP (handler)) |
295 | return call2 (handler, Qget_file_buffer, filename); | |
296 | ||
7539e11f | 297 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 298 | { |
7539e11f | 299 | buf = Fcdr (XCAR (tail)); |
a7a60ce9 KH |
300 | if (!BUFFERP (buf)) continue; |
301 | if (!STRINGP (XBUFFER (buf)->filename)) continue; | |
1ab256cb | 302 | tem = Fstring_equal (XBUFFER (buf)->filename, filename); |
265a9e55 | 303 | if (!NILP (tem)) |
1ab256cb RM |
304 | return buf; |
305 | } | |
306 | return Qnil; | |
307 | } | |
308 | ||
52e01189 RS |
309 | Lisp_Object |
310 | get_truename_buffer (filename) | |
311 | register Lisp_Object filename; | |
312 | { | |
313 | register Lisp_Object tail, buf, tem; | |
314 | ||
7539e11f | 315 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
52e01189 | 316 | { |
7539e11f | 317 | buf = Fcdr (XCAR (tail)); |
52e01189 RS |
318 | if (!BUFFERP (buf)) continue; |
319 | if (!STRINGP (XBUFFER (buf)->file_truename)) continue; | |
320 | tem = Fstring_equal (XBUFFER (buf)->file_truename, filename); | |
321 | if (!NILP (tem)) | |
322 | return buf; | |
323 | } | |
324 | return Qnil; | |
325 | } | |
326 | ||
1ab256cb RM |
327 | /* Incremented for each buffer created, to assign the buffer number. */ |
328 | int buffer_count; | |
329 | ||
330 | DEFUN ("get-buffer-create", Fget_buffer_create, Sget_buffer_create, 1, 1, 0, | |
7ee72033 | 331 | doc: /* Return the buffer named NAME, or create such a buffer and return it. |
018ba359 PJ |
332 | A new buffer is created if there is no live buffer named NAME. |
333 | If NAME starts with a space, the new buffer does not keep undo information. | |
334 | If NAME is a buffer instead of a string, then it is the value returned. | |
7ee72033 MB |
335 | The value is never nil. */) |
336 | (name) | |
1ab256cb RM |
337 | register Lisp_Object name; |
338 | { | |
a9ee7a59 | 339 | register Lisp_Object buf; |
1ab256cb RM |
340 | register struct buffer *b; |
341 | ||
342 | buf = Fget_buffer (name); | |
265a9e55 | 343 | if (!NILP (buf)) |
1ab256cb RM |
344 | return buf; |
345 | ||
d5db4077 | 346 | if (SCHARS (name) == 0) |
31cd83e9 KH |
347 | error ("Empty string for buffer name is not allowed"); |
348 | ||
a21260d9 | 349 | b = (struct buffer *) allocate_buffer (); |
1ab256cb | 350 | |
336cd056 RS |
351 | b->size = sizeof (struct buffer) / sizeof (EMACS_INT); |
352 | ||
353 | /* An ordinary buffer uses its own struct buffer_text. */ | |
354 | b->text = &b->own_text; | |
355 | b->base_buffer = 0; | |
356 | ||
1ab256cb | 357 | BUF_GAP_SIZE (b) = 20; |
9ac0d9e0 | 358 | BLOCK_INPUT; |
3b06f880 KH |
359 | /* We allocate extra 1-byte at the tail and keep it always '\0' for |
360 | anchoring a search. */ | |
b86af064 | 361 | alloc_buffer_text (b, BUF_GAP_SIZE (b) + 1); |
9ac0d9e0 | 362 | UNBLOCK_INPUT; |
1ab256cb | 363 | if (! BUF_BEG_ADDR (b)) |
81841847 | 364 | buffer_memory_full (); |
1ab256cb | 365 | |
6d70a280 SM |
366 | BUF_PT (b) = BEG; |
367 | BUF_GPT (b) = BEG; | |
368 | BUF_BEGV (b) = BEG; | |
369 | BUF_ZV (b) = BEG; | |
370 | BUF_Z (b) = BEG; | |
371 | BUF_PT_BYTE (b) = BEG_BYTE; | |
372 | BUF_GPT_BYTE (b) = BEG_BYTE; | |
373 | BUF_BEGV_BYTE (b) = BEG_BYTE; | |
374 | BUF_ZV_BYTE (b) = BEG_BYTE; | |
375 | BUF_Z_BYTE (b) = BEG_BYTE; | |
1ab256cb | 376 | BUF_MODIFF (b) = 1; |
2509d356 | 377 | BUF_OVERLAY_MODIFF (b) = 1; |
336cd056 RS |
378 | BUF_SAVE_MODIFF (b) = 1; |
379 | BUF_INTERVALS (b) = 0; | |
b5a225b4 GM |
380 | BUF_UNCHANGED_MODIFIED (b) = 1; |
381 | BUF_OVERLAY_UNCHANGED_MODIFIED (b) = 1; | |
382 | BUF_END_UNCHANGED (b) = 0; | |
383 | BUF_BEG_UNCHANGED (b) = 0; | |
3b06f880 | 384 | *(BUF_GPT_ADDR (b)) = *(BUF_Z_ADDR (b)) = 0; /* Put an anchor '\0'. */ |
1ab256cb | 385 | |
28e969dd JB |
386 | b->newline_cache = 0; |
387 | b->width_run_cache = 0; | |
388 | b->width_table = Qnil; | |
b5a225b4 | 389 | b->prevent_redisplay_optimizations_p = 1; |
28e969dd | 390 | |
1ab256cb RM |
391 | /* Put this on the chain of all buffers including killed ones. */ |
392 | b->next = all_buffers; | |
393 | all_buffers = b; | |
394 | ||
336cd056 RS |
395 | /* An ordinary buffer normally doesn't need markers |
396 | to handle BEGV and ZV. */ | |
397 | b->pt_marker = Qnil; | |
398 | b->begv_marker = Qnil; | |
399 | b->zv_marker = Qnil; | |
04ae1b48 RS |
400 | |
401 | name = Fcopy_sequence (name); | |
ab77f05c | 402 | STRING_SET_INTERVALS (name, NULL_INTERVAL); |
1ab256cb | 403 | b->name = name; |
04ae1b48 | 404 | |
d5db4077 | 405 | if (SREF (name, 0) != ' ') |
1ab256cb RM |
406 | b->undo_list = Qnil; |
407 | else | |
408 | b->undo_list = Qt; | |
409 | ||
410 | reset_buffer (b); | |
13de9290 | 411 | reset_buffer_local_variables (b, 1); |
1ab256cb | 412 | |
1f57cb74 | 413 | b->mark = Fmake_marker (); |
65745fad | 414 | BUF_MARKERS (b) = NULL; |
1f57cb74 RS |
415 | b->name = name; |
416 | ||
1ab256cb | 417 | /* Put this in the alist of all live buffers. */ |
67180c6a | 418 | XSETBUFFER (buf, b); |
1ab256cb RM |
419 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); |
420 | ||
d36b182f DL |
421 | /* An error in calling the function here (should someone redfine it) |
422 | can lead to infinite regress until you run out of stack. rms | |
423 | says that's not worth protecting against. */ | |
48265e61 | 424 | if (!NILP (Ffboundp (Qucs_set_table_for_input))) |
d36b182f | 425 | /* buf is on buffer-alist, so no gcpro. */ |
48265e61 DL |
426 | call1 (Qucs_set_table_for_input, buf); |
427 | ||
336cd056 RS |
428 | return buf; |
429 | } | |
430 | ||
7e9d5818 | 431 | |
04e4cb3a GM |
432 | /* Return a list of overlays which is a copy of the overlay list |
433 | LIST, but for buffer B. */ | |
434 | ||
2410d73a | 435 | static struct Lisp_Overlay * |
04e4cb3a GM |
436 | copy_overlays (b, list) |
437 | struct buffer *b; | |
2410d73a | 438 | struct Lisp_Overlay *list; |
04e4cb3a | 439 | { |
2410d73a SM |
440 | Lisp_Object buffer; |
441 | struct Lisp_Overlay *result = NULL, *tail = NULL; | |
04e4cb3a GM |
442 | |
443 | XSETBUFFER (buffer, b); | |
444 | ||
2410d73a | 445 | for (; list; list = list->next) |
04e4cb3a GM |
446 | { |
447 | Lisp_Object overlay, start, end, old_overlay; | |
27c6b98e | 448 | EMACS_INT charpos; |
04e4cb3a | 449 | |
2410d73a | 450 | XSETMISC (old_overlay, list); |
04e4cb3a GM |
451 | charpos = marker_position (OVERLAY_START (old_overlay)); |
452 | start = Fmake_marker (); | |
db3a49a6 | 453 | Fset_marker (start, make_number (charpos), buffer); |
04e4cb3a GM |
454 | XMARKER (start)->insertion_type |
455 | = XMARKER (OVERLAY_START (old_overlay))->insertion_type; | |
456 | ||
457 | charpos = marker_position (OVERLAY_END (old_overlay)); | |
458 | end = Fmake_marker (); | |
db3a49a6 | 459 | Fset_marker (end, make_number (charpos), buffer); |
04e4cb3a GM |
460 | XMARKER (end)->insertion_type |
461 | = XMARKER (OVERLAY_END (old_overlay))->insertion_type; | |
462 | ||
463 | overlay = allocate_misc (); | |
464 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; | |
465 | OVERLAY_START (overlay) = start; | |
466 | OVERLAY_END (overlay) = end; | |
467 | OVERLAY_PLIST (overlay) = Fcopy_sequence (OVERLAY_PLIST (old_overlay)); | |
2410d73a | 468 | XOVERLAY (overlay)->next = NULL; |
177c0ea7 | 469 | |
2410d73a SM |
470 | if (tail) |
471 | tail = tail->next = XOVERLAY (overlay); | |
472 | else | |
473 | result = tail = XOVERLAY (overlay); | |
04e4cb3a GM |
474 | } |
475 | ||
2410d73a | 476 | return result; |
04e4cb3a | 477 | } |
177c0ea7 | 478 | |
04e4cb3a | 479 | |
7e9d5818 GM |
480 | /* Clone per-buffer values of buffer FROM. |
481 | ||
482 | Buffer TO gets the same per-buffer values as FROM, with the | |
483 | following exceptions: (1) TO's name is left untouched, (2) markers | |
484 | are copied and made to refer to TO, and (3) overlay lists are | |
485 | copied. */ | |
486 | ||
487 | static void | |
488 | clone_per_buffer_values (from, to) | |
489 | struct buffer *from, *to; | |
490 | { | |
54622f33 | 491 | Lisp_Object to_buffer; |
7e9d5818 GM |
492 | int offset; |
493 | ||
494 | XSETBUFFER (to_buffer, to); | |
177c0ea7 | 495 | |
7e9d5818 GM |
496 | for (offset = PER_BUFFER_VAR_OFFSET (name) + sizeof (Lisp_Object); |
497 | offset < sizeof *to; | |
498 | offset += sizeof (Lisp_Object)) | |
499 | { | |
500 | Lisp_Object obj; | |
501 | ||
502 | obj = PER_BUFFER_VALUE (from, offset); | |
503 | if (MARKERP (obj)) | |
504 | { | |
505 | struct Lisp_Marker *m = XMARKER (obj); | |
506 | obj = Fmake_marker (); | |
507 | XMARKER (obj)->insertion_type = m->insertion_type; | |
508 | set_marker_both (obj, to_buffer, m->charpos, m->bytepos); | |
509 | } | |
510 | ||
511 | PER_BUFFER_VALUE (to, offset) = obj; | |
512 | } | |
513 | ||
7e9d5818 | 514 | bcopy (from->local_flags, to->local_flags, sizeof to->local_flags); |
177c0ea7 | 515 | |
04e4cb3a GM |
516 | to->overlays_before = copy_overlays (to, from->overlays_before); |
517 | to->overlays_after = copy_overlays (to, from->overlays_after); | |
02f28bbd | 518 | |
e1688f54 RS |
519 | /* Get (a copy of) the alist of Lisp-level local variables of FROM |
520 | and install that in TO. */ | |
521 | to->local_var_alist = buffer_lisp_local_variables (from); | |
7e9d5818 GM |
522 | } |
523 | ||
7e9d5818 GM |
524 | DEFUN ("make-indirect-buffer", Fmake_indirect_buffer, Smake_indirect_buffer, |
525 | 2, 3, | |
193c3837 | 526 | "bMake indirect buffer (to buffer): \nBName of indirect buffer: ", |
7ee72033 | 527 | doc: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME. |
c9aac8e6 | 528 | BASE-BUFFER should be a live buffer, or the name of an existing buffer. |
018ba359 PJ |
529 | NAME should be a string which is not the name of an existing buffer. |
530 | Optional argument CLONE non-nil means preserve BASE-BUFFER's state, | |
531 | such as major and minor modes, in the indirect buffer. | |
7ee72033 MB |
532 | CLONE nil means the indirect buffer's state is reset to default values. */) |
533 | (base_buffer, name, clone) | |
7e9d5818 | 534 | Lisp_Object base_buffer, name, clone; |
336cd056 | 535 | { |
c9aac8e6 | 536 | Lisp_Object buf, tem; |
7e9d5818 | 537 | struct buffer *b; |
336cd056 | 538 | |
ab53e065 | 539 | CHECK_STRING (name); |
336cd056 RS |
540 | buf = Fget_buffer (name); |
541 | if (!NILP (buf)) | |
d5db4077 | 542 | error ("Buffer name `%s' is in use", SDATA (name)); |
336cd056 | 543 | |
c9aac8e6 | 544 | tem = base_buffer; |
336cd056 RS |
545 | base_buffer = Fget_buffer (base_buffer); |
546 | if (NILP (base_buffer)) | |
c9aac8e6 LT |
547 | error ("No such buffer: `%s'", SDATA (tem)); |
548 | if (NILP (XBUFFER (base_buffer)->name)) | |
549 | error ("Base buffer has been killed"); | |
336cd056 | 550 | |
d5db4077 | 551 | if (SCHARS (name) == 0) |
336cd056 RS |
552 | error ("Empty string for buffer name is not allowed"); |
553 | ||
a21260d9 | 554 | b = (struct buffer *) allocate_buffer (); |
336cd056 RS |
555 | b->size = sizeof (struct buffer) / sizeof (EMACS_INT); |
556 | ||
557 | if (XBUFFER (base_buffer)->base_buffer) | |
558 | b->base_buffer = XBUFFER (base_buffer)->base_buffer; | |
559 | else | |
560 | b->base_buffer = XBUFFER (base_buffer); | |
561 | ||
562 | /* Use the base buffer's text object. */ | |
563 | b->text = b->base_buffer->text; | |
564 | ||
565 | BUF_BEGV (b) = BUF_BEGV (b->base_buffer); | |
566 | BUF_ZV (b) = BUF_ZV (b->base_buffer); | |
567 | BUF_PT (b) = BUF_PT (b->base_buffer); | |
3f236a40 RS |
568 | BUF_BEGV_BYTE (b) = BUF_BEGV_BYTE (b->base_buffer); |
569 | BUF_ZV_BYTE (b) = BUF_ZV_BYTE (b->base_buffer); | |
570 | BUF_PT_BYTE (b) = BUF_PT_BYTE (b->base_buffer); | |
336cd056 RS |
571 | |
572 | b->newline_cache = 0; | |
573 | b->width_run_cache = 0; | |
574 | b->width_table = Qnil; | |
575 | ||
576 | /* Put this on the chain of all buffers including killed ones. */ | |
577 | b->next = all_buffers; | |
578 | all_buffers = b; | |
579 | ||
580 | name = Fcopy_sequence (name); | |
ab77f05c | 581 | STRING_SET_INTERVALS (name, NULL_INTERVAL); |
336cd056 RS |
582 | b->name = name; |
583 | ||
584 | reset_buffer (b); | |
13de9290 | 585 | reset_buffer_local_variables (b, 1); |
336cd056 RS |
586 | |
587 | /* Put this in the alist of all live buffers. */ | |
588 | XSETBUFFER (buf, b); | |
589 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); | |
590 | ||
591 | b->mark = Fmake_marker (); | |
1ab256cb | 592 | b->name = name; |
336cd056 | 593 | |
abc9d959 RS |
594 | /* The multibyte status belongs to the base buffer. */ |
595 | b->enable_multibyte_characters = b->base_buffer->enable_multibyte_characters; | |
596 | ||
336cd056 RS |
597 | /* Make sure the base buffer has markers for its narrowing. */ |
598 | if (NILP (b->base_buffer->pt_marker)) | |
599 | { | |
600 | b->base_buffer->pt_marker = Fmake_marker (); | |
3f236a40 RS |
601 | set_marker_both (b->base_buffer->pt_marker, base_buffer, |
602 | BUF_PT (b->base_buffer), | |
603 | BUF_PT_BYTE (b->base_buffer)); | |
336cd056 RS |
604 | } |
605 | if (NILP (b->base_buffer->begv_marker)) | |
606 | { | |
607 | b->base_buffer->begv_marker = Fmake_marker (); | |
3f236a40 RS |
608 | set_marker_both (b->base_buffer->begv_marker, base_buffer, |
609 | BUF_BEGV (b->base_buffer), | |
610 | BUF_BEGV_BYTE (b->base_buffer)); | |
336cd056 RS |
611 | } |
612 | if (NILP (b->base_buffer->zv_marker)) | |
613 | { | |
614 | b->base_buffer->zv_marker = Fmake_marker (); | |
3f236a40 RS |
615 | set_marker_both (b->base_buffer->zv_marker, base_buffer, |
616 | BUF_ZV (b->base_buffer), | |
617 | BUF_ZV_BYTE (b->base_buffer)); | |
26d84681 | 618 | XMARKER (b->base_buffer->zv_marker)->insertion_type = 1; |
336cd056 RS |
619 | } |
620 | ||
7e9d5818 GM |
621 | if (NILP (clone)) |
622 | { | |
623 | /* Give the indirect buffer markers for its narrowing. */ | |
624 | b->pt_marker = Fmake_marker (); | |
625 | set_marker_both (b->pt_marker, buf, BUF_PT (b), BUF_PT_BYTE (b)); | |
626 | b->begv_marker = Fmake_marker (); | |
627 | set_marker_both (b->begv_marker, buf, BUF_BEGV (b), BUF_BEGV_BYTE (b)); | |
628 | b->zv_marker = Fmake_marker (); | |
629 | set_marker_both (b->zv_marker, buf, BUF_ZV (b), BUF_ZV_BYTE (b)); | |
630 | XMARKER (b->zv_marker)->insertion_type = 1; | |
631 | } | |
632 | else | |
7fa57e45 RS |
633 | { |
634 | struct buffer *old_b = current_buffer; | |
635 | ||
636 | clone_per_buffer_values (b->base_buffer, b); | |
637 | b->filename = Qnil; | |
638 | b->file_truename = Qnil; | |
639 | b->display_count = make_number (0); | |
640 | b->backed_up = Qnil; | |
641 | b->auto_save_file_name = Qnil; | |
642 | set_buffer_internal_1 (b); | |
643 | Fset (intern ("buffer-save-without-query"), Qnil); | |
644 | Fset (intern ("buffer-file-number"), Qnil); | |
645 | Fset (intern ("buffer-stale-function"), Qnil); | |
646 | set_buffer_internal_1 (old_b); | |
647 | } | |
336cd056 | 648 | |
a9ee7a59 | 649 | return buf; |
1ab256cb RM |
650 | } |
651 | ||
d4f5719a SM |
652 | void |
653 | delete_all_overlays (b) | |
654 | struct buffer *b; | |
655 | { | |
656 | Lisp_Object overlay; | |
657 | ||
658 | /* `reset_buffer' blindly sets the list of overlays to NULL, so we | |
659 | have to empty the list, otherwise we end up with overlays that | |
660 | think they belong to this buffer while the buffer doesn't know about | |
661 | them any more. */ | |
662 | while (b->overlays_before) | |
663 | { | |
664 | XSETMISC (overlay, b->overlays_before); | |
665 | Fdelete_overlay (overlay); | |
666 | } | |
667 | while (b->overlays_after) | |
668 | { | |
669 | XSETMISC (overlay, b->overlays_after); | |
670 | Fdelete_overlay (overlay); | |
671 | } | |
672 | eassert (b->overlays_before == NULL); | |
673 | eassert (b->overlays_after == NULL); | |
674 | } | |
675 | ||
bcd40520 | 676 | /* Reinitialize everything about a buffer except its name and contents |
c9aac8e6 | 677 | and local variables. |
d4f5719a SM |
678 | If called on an already-initialized buffer, the list of overlays |
679 | should be deleted before calling this function, otherwise we end up | |
680 | with overlays that claim to belong to the buffer but the buffer | |
681 | claims it doesn't belong to it. */ | |
1ab256cb RM |
682 | |
683 | void | |
684 | reset_buffer (b) | |
685 | register struct buffer *b; | |
686 | { | |
687 | b->filename = Qnil; | |
f6ed2e84 | 688 | b->file_truename = Qnil; |
1ab256cb RM |
689 | b->directory = (current_buffer) ? current_buffer->directory : Qnil; |
690 | b->modtime = 0; | |
8d7a4592 | 691 | XSETFASTINT (b->save_length, 0); |
1ab256cb | 692 | b->last_window_start = 1; |
8b264726 | 693 | /* It is more conservative to start out "changed" than "unchanged". */ |
b5a225b4 GM |
694 | b->clip_changed = 0; |
695 | b->prevent_redisplay_optimizations_p = 1; | |
1ab256cb RM |
696 | b->backed_up = Qnil; |
697 | b->auto_save_modified = 0; | |
84f6bcba | 698 | b->auto_save_failure_time = -1; |
1ab256cb RM |
699 | b->auto_save_file_name = Qnil; |
700 | b->read_only = Qnil; | |
2410d73a SM |
701 | b->overlays_before = NULL; |
702 | b->overlays_after = NULL; | |
c2d5b10f | 703 | b->overlay_center = BEG; |
dfda7a7f | 704 | b->mark_active = Qnil; |
943e065b | 705 | b->point_before_scroll = Qnil; |
be9aafdd | 706 | b->file_format = Qnil; |
71ed49fa | 707 | b->auto_save_file_format = Qt; |
0dc6f165 | 708 | b->last_selected_window = Qnil; |
7962a441 | 709 | XSETINT (b->display_count, 0); |
3fd364db | 710 | b->display_time = Qnil; |
1bf08baf | 711 | b->enable_multibyte_characters = buffer_defaults.enable_multibyte_characters; |
bb2ec976 | 712 | b->cursor_type = buffer_defaults.cursor_type; |
a3bbced0 | 713 | b->extra_line_spacing = buffer_defaults.extra_line_spacing; |
0522997d RS |
714 | |
715 | b->display_error_modiff = 0; | |
1ab256cb RM |
716 | } |
717 | ||
bcd40520 RS |
718 | /* Reset buffer B's local variables info. |
719 | Don't use this on a buffer that has already been in use; | |
720 | it does not treat permanent locals consistently. | |
13de9290 RS |
721 | Instead, use Fkill_all_local_variables. |
722 | ||
723 | If PERMANENT_TOO is 1, then we reset permanent built-in | |
724 | buffer-local variables. If PERMANENT_TOO is 0, | |
725 | we preserve those. */ | |
bcd40520 | 726 | |
13de9290 RS |
727 | static void |
728 | reset_buffer_local_variables (b, permanent_too) | |
1ab256cb | 729 | register struct buffer *b; |
13de9290 | 730 | int permanent_too; |
1ab256cb RM |
731 | { |
732 | register int offset; | |
7c02e886 | 733 | int i; |
1ab256cb RM |
734 | |
735 | /* Reset the major mode to Fundamental, together with all the | |
736 | things that depend on the major mode. | |
737 | default-major-mode is handled at a higher level. | |
738 | We ignore it here. */ | |
739 | b->major_mode = Qfundamental_mode; | |
740 | b->keymap = Qnil; | |
1ab256cb RM |
741 | b->mode_name = QSFundamental; |
742 | b->minor_modes = Qnil; | |
3446af9c RS |
743 | |
744 | /* If the standard case table has been altered and invalidated, | |
745 | fix up its insides first. */ | |
746 | if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[0]) | |
747 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[1]) | |
748 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[2]))) | |
749 | Fset_standard_case_table (Vascii_downcase_table); | |
750 | ||
1ab256cb | 751 | b->downcase_table = Vascii_downcase_table; |
1e9b6335 RS |
752 | b->upcase_table = XCHAR_TABLE (Vascii_downcase_table)->extras[0]; |
753 | b->case_canon_table = XCHAR_TABLE (Vascii_downcase_table)->extras[1]; | |
754 | b->case_eqv_table = XCHAR_TABLE (Vascii_downcase_table)->extras[2]; | |
3cb719bd | 755 | b->invisibility_spec = Qt; |
2e716096 RS |
756 | #ifndef DOS_NT |
757 | b->buffer_file_type = Qnil; | |
758 | #endif | |
3cb719bd | 759 | |
13de9290 | 760 | /* Reset all (or most) per-buffer variables to their defaults. */ |
1ab256cb | 761 | b->local_var_alist = Qnil; |
7313acd0 | 762 | for (i = 0; i < last_per_buffer_idx; ++i) |
7c02e886 | 763 | if (permanent_too || buffer_permanent_local_flags[i] == 0) |
7313acd0 | 764 | SET_PER_BUFFER_VALUE_P (b, i, 0); |
1ab256cb RM |
765 | |
766 | /* For each slot that has a default value, | |
767 | copy that into the slot. */ | |
768 | ||
7313acd0 | 769 | for (offset = PER_BUFFER_VAR_OFFSET (name); |
7c02e886 GM |
770 | offset < sizeof *b; |
771 | offset += sizeof (Lisp_Object)) | |
aab80822 | 772 | { |
7313acd0 | 773 | int idx = PER_BUFFER_IDX (offset); |
7c02e886 GM |
774 | if ((idx > 0 |
775 | && (permanent_too | |
776 | || buffer_permanent_local_flags[idx] == 0)) | |
777 | /* Is -2 used anywhere? */ | |
778 | || idx == -2) | |
7313acd0 | 779 | PER_BUFFER_VALUE (b, offset) = PER_BUFFER_DEFAULT (offset); |
aab80822 | 780 | } |
1ab256cb RM |
781 | } |
782 | ||
01050cb5 RM |
783 | /* We split this away from generate-new-buffer, because rename-buffer |
784 | and set-visited-file-name ought to be able to use this to really | |
785 | rename the buffer properly. */ | |
786 | ||
787 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, Sgenerate_new_buffer_name, | |
efc7e75f | 788 | 1, 2, 0, |
7ee72033 | 789 | doc: /* Return a string that is the name of no existing buffer based on NAME. |
018ba359 PJ |
790 | If there is no live buffer named NAME, then return NAME. |
791 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER | |
54dffe35 | 792 | \(starting at 2) until an unused name is found, and then return that name. |
018ba359 PJ |
793 | Optional second argument IGNORE specifies a name that is okay to use |
794 | \(if it is in the sequence to be tried) | |
7ee72033 MB |
795 | even if a buffer with that name exists. */) |
796 | (name, ignore) | |
c273e647 | 797 | register Lisp_Object name, ignore; |
1ab256cb RM |
798 | { |
799 | register Lisp_Object gentemp, tem; | |
800 | int count; | |
801 | char number[10]; | |
802 | ||
b7826503 | 803 | CHECK_STRING (name); |
1ab256cb | 804 | |
54dffe35 LT |
805 | tem = Fstring_equal (name, ignore); |
806 | if (!NILP (tem)) | |
807 | return name; | |
1ab256cb | 808 | tem = Fget_buffer (name); |
265a9e55 | 809 | if (NILP (tem)) |
01050cb5 | 810 | return name; |
1ab256cb RM |
811 | |
812 | count = 1; | |
813 | while (1) | |
814 | { | |
815 | sprintf (number, "<%d>", ++count); | |
816 | gentemp = concat2 (name, build_string (number)); | |
638e4fc3 | 817 | tem = Fstring_equal (gentemp, ignore); |
c273e647 RS |
818 | if (!NILP (tem)) |
819 | return gentemp; | |
1ab256cb | 820 | tem = Fget_buffer (gentemp); |
265a9e55 | 821 | if (NILP (tem)) |
01050cb5 | 822 | return gentemp; |
1ab256cb RM |
823 | } |
824 | } | |
825 | ||
826 | \f | |
827 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, | |
7ee72033 MB |
828 | doc: /* Return the name of BUFFER, as a string. |
829 | With no argument or nil as argument, return the name of the current buffer. */) | |
830 | (buffer) | |
1ab256cb RM |
831 | register Lisp_Object buffer; |
832 | { | |
265a9e55 | 833 | if (NILP (buffer)) |
1ab256cb | 834 | return current_buffer->name; |
b7826503 | 835 | CHECK_BUFFER (buffer); |
1ab256cb RM |
836 | return XBUFFER (buffer)->name; |
837 | } | |
838 | ||
839 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, | |
7ee72033 MB |
840 | doc: /* Return name of file BUFFER is visiting, or nil if none. |
841 | No argument or nil as argument means use the current buffer. */) | |
842 | (buffer) | |
1ab256cb RM |
843 | register Lisp_Object buffer; |
844 | { | |
265a9e55 | 845 | if (NILP (buffer)) |
1ab256cb | 846 | return current_buffer->filename; |
b7826503 | 847 | CHECK_BUFFER (buffer); |
1ab256cb RM |
848 | return XBUFFER (buffer)->filename; |
849 | } | |
850 | ||
336cd056 RS |
851 | DEFUN ("buffer-base-buffer", Fbuffer_base_buffer, Sbuffer_base_buffer, |
852 | 0, 1, 0, | |
7ee72033 | 853 | doc: /* Return the base buffer of indirect buffer BUFFER. |
5a72efd4 LT |
854 | If BUFFER is not indirect, return nil. |
855 | BUFFER defaults to the current buffer. */) | |
7ee72033 | 856 | (buffer) |
336cd056 RS |
857 | register Lisp_Object buffer; |
858 | { | |
859 | struct buffer *base; | |
860 | Lisp_Object base_buffer; | |
861 | ||
862 | if (NILP (buffer)) | |
863 | base = current_buffer->base_buffer; | |
864 | else | |
865 | { | |
b7826503 | 866 | CHECK_BUFFER (buffer); |
336cd056 RS |
867 | base = XBUFFER (buffer)->base_buffer; |
868 | } | |
869 | ||
870 | if (! base) | |
871 | return Qnil; | |
872 | XSETBUFFER (base_buffer, base); | |
873 | return base_buffer; | |
874 | } | |
875 | ||
79aa712d | 876 | DEFUN ("buffer-local-value", Fbuffer_local_value, |
177c0ea7 | 877 | Sbuffer_local_value, 2, 2, 0, |
79aa712d RS |
878 | doc: /* Return the value of VARIABLE in BUFFER. |
879 | If VARIABLE does not have a buffer-local binding in BUFFER, the value | |
5e2ad10b JB |
880 | is the default binding of the variable. */) |
881 | (variable, buffer) | |
882 | register Lisp_Object variable; | |
79aa712d RS |
883 | register Lisp_Object buffer; |
884 | { | |
885 | register struct buffer *buf; | |
886 | register Lisp_Object result; | |
887 | ||
5e2ad10b | 888 | CHECK_SYMBOL (variable); |
ae69175b | 889 | CHECK_BUFFER (buffer); |
79aa712d RS |
890 | buf = XBUFFER (buffer); |
891 | ||
0e4d0c9a RS |
892 | if (SYMBOLP (variable)) |
893 | variable = indirect_variable (variable); | |
894 | ||
79aa712d | 895 | /* Look in local_var_list */ |
5e2ad10b | 896 | result = Fassoc (variable, buf->local_var_alist); |
177c0ea7 | 897 | if (NILP (result)) |
79aa712d RS |
898 | { |
899 | int offset, idx; | |
900 | int found = 0; | |
901 | ||
902 | /* Look in special slots */ | |
903 | for (offset = PER_BUFFER_VAR_OFFSET (name); | |
904 | offset < sizeof (struct buffer); | |
905 | /* sizeof EMACS_INT == sizeof Lisp_Object */ | |
906 | offset += (sizeof (EMACS_INT))) | |
907 | { | |
908 | idx = PER_BUFFER_IDX (offset); | |
909 | if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx)) | |
177c0ea7 | 910 | && SYMBOLP (PER_BUFFER_SYMBOL (offset)) |
5e2ad10b | 911 | && EQ (PER_BUFFER_SYMBOL (offset), variable)) |
79aa712d RS |
912 | { |
913 | result = PER_BUFFER_VALUE (buf, offset); | |
914 | found = 1; | |
915 | break; | |
916 | } | |
917 | } | |
918 | ||
919 | if (!found) | |
5e2ad10b | 920 | result = Fdefault_value (variable); |
79aa712d RS |
921 | } |
922 | else | |
f0bac7de RS |
923 | { |
924 | Lisp_Object valcontents; | |
925 | Lisp_Object current_alist_element; | |
926 | ||
927 | /* What binding is loaded right now? */ | |
5e2ad10b | 928 | valcontents = SYMBOL_VALUE (variable); |
f0bac7de RS |
929 | current_alist_element |
930 | = XCAR (XBUFFER_LOCAL_VALUE (valcontents)->cdr); | |
931 | ||
932 | /* The value of the currently loaded binding is not | |
933 | stored in it, but rather in the realvalue slot. | |
934 | Store that value into the binding it belongs to | |
935 | in case that is the one we are about to use. */ | |
936 | ||
937 | Fsetcdr (current_alist_element, | |
938 | do_symval_forwarding (XBUFFER_LOCAL_VALUE (valcontents)->realvalue)); | |
939 | ||
940 | /* Now get the (perhaps updated) value out of the binding. */ | |
941 | result = XCDR (result); | |
942 | } | |
79aa712d | 943 | |
4c4dc0b0 KS |
944 | if (!EQ (result, Qunbound)) |
945 | return result; | |
79aa712d | 946 | |
4c4dc0b0 | 947 | xsignal1 (Qvoid_variable, variable); |
79aa712d RS |
948 | } |
949 | ||
e1688f54 | 950 | /* Return an alist of the Lisp-level buffer-local bindings of |
7fa57e45 | 951 | buffer BUF. That is, don't include the variables maintained |
e1688f54 RS |
952 | in special slots in the buffer object. */ |
953 | ||
954 | static Lisp_Object | |
955 | buffer_lisp_local_variables (buf) | |
956 | struct buffer *buf; | |
957 | { | |
958 | Lisp_Object result = Qnil; | |
959 | register Lisp_Object tail; | |
960 | for (tail = buf->local_var_alist; CONSP (tail); tail = XCDR (tail)) | |
961 | { | |
962 | Lisp_Object val, elt; | |
963 | ||
964 | elt = XCAR (tail); | |
965 | ||
966 | /* Reference each variable in the alist in buf. | |
967 | If inquiring about the current buffer, this gets the current values, | |
968 | so store them into the alist so the alist is up to date. | |
969 | If inquiring about some other buffer, this swaps out any values | |
970 | for that buffer, making the alist up to date automatically. */ | |
971 | val = find_symbol_value (XCAR (elt)); | |
972 | /* Use the current buffer value only if buf is the current buffer. */ | |
973 | if (buf != current_buffer) | |
974 | val = XCDR (elt); | |
975 | ||
976 | /* If symbol is unbound, put just the symbol in the list. */ | |
977 | if (EQ (val, Qunbound)) | |
978 | result = Fcons (XCAR (elt), result); | |
979 | /* Otherwise, put (symbol . value) in the list. */ | |
980 | else | |
981 | result = Fcons (Fcons (XCAR (elt), val), result); | |
982 | } | |
983 | ||
984 | return result; | |
985 | } | |
986 | ||
1ab256cb | 987 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, |
efc7e75f | 988 | Sbuffer_local_variables, 0, 1, 0, |
7ee72033 | 989 | doc: /* Return an alist of variables that are buffer-local in BUFFER. |
018ba359 PJ |
990 | Most elements look like (SYMBOL . VALUE), describing one variable. |
991 | For a symbol that is locally unbound, just the symbol appears in the value. | |
992 | Note that storing new VALUEs in these elements doesn't change the variables. | |
7ee72033 MB |
993 | No argument or nil as argument means use current buffer as BUFFER. */) |
994 | (buffer) | |
1ab256cb RM |
995 | register Lisp_Object buffer; |
996 | { | |
997 | register struct buffer *buf; | |
553defa4 | 998 | register Lisp_Object result; |
1ab256cb | 999 | |
265a9e55 | 1000 | if (NILP (buffer)) |
1ab256cb RM |
1001 | buf = current_buffer; |
1002 | else | |
1003 | { | |
b7826503 | 1004 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1005 | buf = XBUFFER (buffer); |
1006 | } | |
1007 | ||
e1688f54 | 1008 | result = buffer_lisp_local_variables (buf); |
1ab256cb | 1009 | |
1ab256cb RM |
1010 | /* Add on all the variables stored in special slots. */ |
1011 | { | |
7c02e886 | 1012 | int offset, idx; |
1ab256cb | 1013 | |
7313acd0 | 1014 | for (offset = PER_BUFFER_VAR_OFFSET (name); |
1ab256cb | 1015 | offset < sizeof (struct buffer); |
7c02e886 GM |
1016 | /* sizeof EMACS_INT == sizeof Lisp_Object */ |
1017 | offset += (sizeof (EMACS_INT))) | |
1ab256cb | 1018 | { |
7313acd0 GM |
1019 | idx = PER_BUFFER_IDX (offset); |
1020 | if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx)) | |
1021 | && SYMBOLP (PER_BUFFER_SYMBOL (offset))) | |
1022 | result = Fcons (Fcons (PER_BUFFER_SYMBOL (offset), | |
1023 | PER_BUFFER_VALUE (buf, offset)), | |
7c02e886 | 1024 | result); |
1ab256cb RM |
1025 | } |
1026 | } | |
553defa4 RS |
1027 | |
1028 | return result; | |
1ab256cb | 1029 | } |
1ab256cb RM |
1030 | \f |
1031 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, | |
efc7e75f | 1032 | 0, 1, 0, |
7ee72033 MB |
1033 | doc: /* Return t if BUFFER was modified since its file was last read or saved. |
1034 | No argument or nil as argument means use current buffer as BUFFER. */) | |
1035 | (buffer) | |
1ab256cb RM |
1036 | register Lisp_Object buffer; |
1037 | { | |
1038 | register struct buffer *buf; | |
265a9e55 | 1039 | if (NILP (buffer)) |
1ab256cb RM |
1040 | buf = current_buffer; |
1041 | else | |
1042 | { | |
b7826503 | 1043 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1044 | buf = XBUFFER (buffer); |
1045 | } | |
1046 | ||
336cd056 | 1047 | return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil; |
1ab256cb RM |
1048 | } |
1049 | ||
1050 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, | |
efc7e75f | 1051 | 1, 1, 0, |
7ee72033 MB |
1052 | doc: /* Mark current buffer as modified or unmodified according to FLAG. |
1053 | A non-nil FLAG means mark the buffer modified. */) | |
1054 | (flag) | |
1ab256cb RM |
1055 | register Lisp_Object flag; |
1056 | { | |
1057 | register int already; | |
1058 | register Lisp_Object fn; | |
8ec01c70 | 1059 | Lisp_Object buffer, window; |
1ab256cb RM |
1060 | |
1061 | #ifdef CLASH_DETECTION | |
1062 | /* If buffer becoming modified, lock the file. | |
1063 | If buffer becoming unmodified, unlock the file. */ | |
1064 | ||
60f4dd23 | 1065 | fn = current_buffer->file_truename; |
90d456d2 KH |
1066 | /* Test buffer-file-name so that binding it to nil is effective. */ |
1067 | if (!NILP (fn) && ! NILP (current_buffer->filename)) | |
1ab256cb | 1068 | { |
336cd056 | 1069 | already = SAVE_MODIFF < MODIFF; |
265a9e55 | 1070 | if (!already && !NILP (flag)) |
1ab256cb | 1071 | lock_file (fn); |
265a9e55 | 1072 | else if (already && NILP (flag)) |
1ab256cb RM |
1073 | unlock_file (fn); |
1074 | } | |
1075 | #endif /* CLASH_DETECTION */ | |
1076 | ||
336cd056 | 1077 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
177c0ea7 | 1078 | |
8ec01c70 GM |
1079 | /* Set update_mode_lines only if buffer is displayed in some window. |
1080 | Packages like jit-lock or lazy-lock preserve a buffer's modified | |
1081 | state by recording/restoring the state around blocks of code. | |
1082 | Setting update_mode_lines makes redisplay consider all windows | |
1083 | (on all frames). Stealth fontification of buffers not displayed | |
1084 | would incur additional redisplay costs if we'd set | |
1085 | update_modes_lines unconditionally. | |
1086 | ||
1087 | Ideally, I think there should be another mechanism for fontifying | |
1088 | buffers without "modifying" buffers, or redisplay should be | |
1089 | smarter about updating the `*' in mode lines. --gerd */ | |
1090 | XSETBUFFER (buffer, current_buffer); | |
1091 | window = Fget_buffer_window (buffer, Qt); | |
1092 | if (WINDOWP (window)) | |
d57b83b3 GM |
1093 | { |
1094 | ++update_mode_lines; | |
1095 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
1096 | } | |
177c0ea7 | 1097 | |
1ab256cb RM |
1098 | return flag; |
1099 | } | |
1100 | ||
a8c21b48 GM |
1101 | DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p, |
1102 | Srestore_buffer_modified_p, 1, 1, 0, | |
42f47086 | 1103 | doc: /* Like `set-buffer-modified-p', with a difference concerning redisplay. |
018ba359 | 1104 | It is not ensured that mode lines will be updated to show the modified |
7ee72033 MB |
1105 | state of the current buffer. Use with care. */) |
1106 | (flag) | |
a8c21b48 GM |
1107 | Lisp_Object flag; |
1108 | { | |
1109 | #ifdef CLASH_DETECTION | |
1110 | Lisp_Object fn; | |
177c0ea7 | 1111 | |
a8c21b48 GM |
1112 | /* If buffer becoming modified, lock the file. |
1113 | If buffer becoming unmodified, unlock the file. */ | |
1114 | ||
1115 | fn = current_buffer->file_truename; | |
1116 | /* Test buffer-file-name so that binding it to nil is effective. */ | |
1117 | if (!NILP (fn) && ! NILP (current_buffer->filename)) | |
1118 | { | |
1119 | int already = SAVE_MODIFF < MODIFF; | |
1120 | if (!already && !NILP (flag)) | |
1121 | lock_file (fn); | |
1122 | else if (already && NILP (flag)) | |
1123 | unlock_file (fn); | |
1124 | } | |
1125 | #endif /* CLASH_DETECTION */ | |
177c0ea7 | 1126 | |
a8c21b48 GM |
1127 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
1128 | return flag; | |
1129 | } | |
1130 | ||
1ab256cb | 1131 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, |
efc7e75f | 1132 | 0, 1, 0, |
7ee72033 | 1133 | doc: /* Return BUFFER's tick counter, incremented for each change in text. |
018ba359 PJ |
1134 | Each buffer has a tick counter which is incremented each time the text in |
1135 | that buffer is changed. It wraps around occasionally. | |
7ee72033 MB |
1136 | No argument or nil as argument means use current buffer as BUFFER. */) |
1137 | (buffer) | |
1ab256cb RM |
1138 | register Lisp_Object buffer; |
1139 | { | |
1140 | register struct buffer *buf; | |
265a9e55 | 1141 | if (NILP (buffer)) |
1ab256cb RM |
1142 | buf = current_buffer; |
1143 | else | |
1144 | { | |
b7826503 | 1145 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1146 | buf = XBUFFER (buffer); |
1147 | } | |
1148 | ||
1149 | return make_number (BUF_MODIFF (buf)); | |
1150 | } | |
1151 | \f | |
01050cb5 | 1152 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
4c7e5f09 | 1153 | "sRename buffer (to new name): \nP", |
7ee72033 | 1154 | doc: /* Change current buffer's name to NEWNAME (a string). |
018ba359 PJ |
1155 | If second arg UNIQUE is nil or omitted, it is an error if a |
1156 | buffer named NEWNAME already exists. | |
1157 | If UNIQUE is non-nil, come up with a new name using | |
1158 | `generate-new-buffer-name'. | |
1159 | Interactively, you can set UNIQUE with a prefix argument. | |
1160 | We return the name we actually gave the buffer. | |
7ee72033 MB |
1161 | This does not change the name of the visited file (if any). */) |
1162 | (newname, unique) | |
489c043a | 1163 | register Lisp_Object newname, unique; |
1ab256cb RM |
1164 | { |
1165 | register Lisp_Object tem, buf; | |
1166 | ||
b7826503 | 1167 | CHECK_STRING (newname); |
d59698c4 | 1168 | |
d5db4077 | 1169 | if (SCHARS (newname) == 0) |
d59698c4 RS |
1170 | error ("Empty string is invalid as a buffer name"); |
1171 | ||
489c043a | 1172 | tem = Fget_buffer (newname); |
265a9e55 | 1173 | if (!NILP (tem)) |
01050cb5 | 1174 | { |
8801a864 KR |
1175 | /* Don't short-circuit if UNIQUE is t. That is a useful way to |
1176 | rename the buffer automatically so you can create another | |
1177 | with the original name. It makes UNIQUE equivalent to | |
1178 | (rename-buffer (generate-new-buffer-name NEWNAME)). */ | |
1179 | if (NILP (unique) && XBUFFER (tem) == current_buffer) | |
1180 | return current_buffer->name; | |
3bd779aa | 1181 | if (!NILP (unique)) |
489c043a | 1182 | newname = Fgenerate_new_buffer_name (newname, current_buffer->name); |
01050cb5 | 1183 | else |
d5db4077 | 1184 | error ("Buffer name `%s' is in use", SDATA (newname)); |
01050cb5 | 1185 | } |
1ab256cb | 1186 | |
489c043a | 1187 | current_buffer->name = newname; |
76f590d7 JB |
1188 | |
1189 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
1190 | any windows displaying current_buffer will stay unchanged. */ | |
1191 | update_mode_lines++; | |
1192 | ||
67180c6a | 1193 | XSETBUFFER (buf, current_buffer); |
489c043a | 1194 | Fsetcar (Frassq (buf, Vbuffer_alist), newname); |
cf058e49 KH |
1195 | if (NILP (current_buffer->filename) |
1196 | && !NILP (current_buffer->auto_save_file_name)) | |
1ab256cb | 1197 | call0 (intern ("rename-auto-save-file")); |
fb5eba9c RS |
1198 | /* Refetch since that last call may have done GC. */ |
1199 | return current_buffer->name; | |
1ab256cb RM |
1200 | } |
1201 | ||
773fbdb9 | 1202 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 3, 0, |
7ee72033 | 1203 | doc: /* Return most recently selected buffer other than BUFFER. |
018ba359 PJ |
1204 | Buffers not visible in windows are preferred to visible buffers, |
1205 | unless optional second argument VISIBLE-OK is non-nil. | |
1206 | If the optional third argument FRAME is non-nil, use that frame's | |
1207 | buffer list instead of the selected frame's buffer list. | |
1208 | If no other buffer exists, the buffer `*scratch*' is returned. | |
7ee72033 MB |
1209 | If BUFFER is omitted or nil, some interesting buffer is returned. */) |
1210 | (buffer, visible_ok, frame) | |
773fbdb9 | 1211 | register Lisp_Object buffer, visible_ok, frame; |
1ab256cb | 1212 | { |
89132f25 | 1213 | Lisp_Object Fset_buffer_major_mode (); |
7962a441 | 1214 | register Lisp_Object tail, buf, notsogood, tem, pred, add_ons; |
1ab256cb RM |
1215 | notsogood = Qnil; |
1216 | ||
773fbdb9 | 1217 | if (NILP (frame)) |
9ba9623d | 1218 | frame = selected_frame; |
773fbdb9 | 1219 | |
7962a441 | 1220 | tail = Vbuffer_alist; |
773fbdb9 | 1221 | pred = frame_buffer_predicate (frame); |
7962a441 RS |
1222 | |
1223 | /* Consider buffers that have been seen in the selected frame | |
1224 | before other buffers. */ | |
177c0ea7 | 1225 | |
773fbdb9 | 1226 | tem = frame_buffer_list (frame); |
7962a441 RS |
1227 | add_ons = Qnil; |
1228 | while (CONSP (tem)) | |
1229 | { | |
7539e11f KR |
1230 | if (BUFFERP (XCAR (tem))) |
1231 | add_ons = Fcons (Fcons (Qnil, XCAR (tem)), add_ons); | |
1232 | tem = XCDR (tem); | |
7962a441 RS |
1233 | } |
1234 | tail = nconc2 (Fnreverse (add_ons), tail); | |
1235 | ||
6d70a280 | 1236 | for (; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1237 | { |
6d70a280 | 1238 | buf = Fcdr (XCAR (tail)); |
1ab256cb RM |
1239 | if (EQ (buf, buffer)) |
1240 | continue; | |
d674d13e RS |
1241 | if (NILP (buf)) |
1242 | continue; | |
1243 | if (NILP (XBUFFER (buf)->name)) | |
1244 | continue; | |
10ceceb8 | 1245 | if (SREF (XBUFFER (buf)->name, 0) == ' ') |
1ab256cb | 1246 | continue; |
04ae1b48 RS |
1247 | /* If the selected frame has a buffer_predicate, |
1248 | disregard buffers that don't fit the predicate. */ | |
7962a441 | 1249 | if (!NILP (pred)) |
04ae1b48 | 1250 | { |
7962a441 | 1251 | tem = call1 (pred, buf); |
04ae1b48 RS |
1252 | if (NILP (tem)) |
1253 | continue; | |
1254 | } | |
04ae1b48 | 1255 | |
a0ebb746 | 1256 | if (NILP (visible_ok)) |
66ffe51c | 1257 | tem = Fget_buffer_window (buf, Qvisible); |
a0ebb746 JB |
1258 | else |
1259 | tem = Qnil; | |
265a9e55 | 1260 | if (NILP (tem)) |
1ab256cb | 1261 | return buf; |
265a9e55 | 1262 | if (NILP (notsogood)) |
1ab256cb RM |
1263 | notsogood = buf; |
1264 | } | |
265a9e55 | 1265 | if (!NILP (notsogood)) |
1ab256cb | 1266 | return notsogood; |
dba1a30a GM |
1267 | buf = Fget_buffer (build_string ("*scratch*")); |
1268 | if (NILP (buf)) | |
1269 | { | |
1270 | buf = Fget_buffer_create (build_string ("*scratch*")); | |
1271 | Fset_buffer_major_mode (buf); | |
1272 | } | |
89132f25 | 1273 | return buf; |
1ab256cb RM |
1274 | } |
1275 | \f | |
1ab256cb RM |
1276 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, |
1277 | 0, 1, "", | |
7ee72033 MB |
1278 | doc: /* Start keeping undo information for buffer BUFFER. |
1279 | No argument or nil as argument means do this for the current buffer. */) | |
1280 | (buffer) | |
ffd56f97 | 1281 | register Lisp_Object buffer; |
1ab256cb | 1282 | { |
ffd56f97 | 1283 | Lisp_Object real_buffer; |
1ab256cb | 1284 | |
ffd56f97 | 1285 | if (NILP (buffer)) |
67180c6a | 1286 | XSETBUFFER (real_buffer, current_buffer); |
1ab256cb RM |
1287 | else |
1288 | { | |
ffd56f97 JB |
1289 | real_buffer = Fget_buffer (buffer); |
1290 | if (NILP (real_buffer)) | |
1291 | nsberror (buffer); | |
1ab256cb RM |
1292 | } |
1293 | ||
ffd56f97 JB |
1294 | if (EQ (XBUFFER (real_buffer)->undo_list, Qt)) |
1295 | XBUFFER (real_buffer)->undo_list = Qnil; | |
1ab256cb RM |
1296 | |
1297 | return Qnil; | |
1298 | } | |
1299 | ||
1300 | /* | |
1301 | DEFVAR_LISP ("kill-buffer-hook", no_cell, "\ | |
1302 | Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\ | |
1303 | The buffer being killed will be current while the hook is running.\n\ | |
1304 | See `kill-buffer'." | |
1305 | */ | |
1306 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 1, 1, "bKill buffer: ", | |
7ee72033 | 1307 | doc: /* Kill the buffer BUFFER. |
018ba359 PJ |
1308 | The argument may be a buffer or may be the name of a buffer. |
1309 | An argument of nil means kill the current buffer. | |
1310 | ||
1311 | Value is t if the buffer is actually killed, nil if user says no. | |
1312 | ||
1313 | The value of `kill-buffer-hook' (which may be local to that buffer), | |
1314 | if not void, is a list of functions to be called, with no arguments, | |
1315 | before the buffer is actually killed. The buffer to be killed is current | |
1316 | when the hook functions are called. | |
1317 | ||
1318 | Any processes that have this buffer as the `process-buffer' are killed | |
7ee72033 MB |
1319 | with SIGHUP. */) |
1320 | (buffer) | |
a25f13ae | 1321 | Lisp_Object buffer; |
1ab256cb RM |
1322 | { |
1323 | Lisp_Object buf; | |
1324 | register struct buffer *b; | |
1325 | register Lisp_Object tem; | |
1326 | register struct Lisp_Marker *m; | |
6af718a4 | 1327 | struct gcpro gcpro1; |
1ab256cb | 1328 | |
a25f13ae | 1329 | if (NILP (buffer)) |
1ab256cb RM |
1330 | buf = Fcurrent_buffer (); |
1331 | else | |
a25f13ae | 1332 | buf = Fget_buffer (buffer); |
265a9e55 | 1333 | if (NILP (buf)) |
a25f13ae | 1334 | nsberror (buffer); |
1ab256cb RM |
1335 | |
1336 | b = XBUFFER (buf); | |
1337 | ||
4a4a9db5 KH |
1338 | /* Avoid trouble for buffer already dead. */ |
1339 | if (NILP (b->name)) | |
1340 | return Qnil; | |
1341 | ||
1ab256cb | 1342 | /* Query if the buffer is still modified. */ |
265a9e55 | 1343 | if (INTERACTIVE && !NILP (b->filename) |
336cd056 | 1344 | && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) |
1ab256cb | 1345 | { |
a25f13ae | 1346 | GCPRO1 (buf); |
5c4930b0 RS |
1347 | tem = do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ", |
1348 | b->name, make_number (0))); | |
1ab256cb | 1349 | UNGCPRO; |
265a9e55 | 1350 | if (NILP (tem)) |
1ab256cb RM |
1351 | return Qnil; |
1352 | } | |
1353 | ||
dcdffbf6 | 1354 | /* Run hooks with the buffer to be killed the current buffer. */ |
1ab256cb | 1355 | { |
aed13378 | 1356 | int count = SPECPDL_INDEX (); |
5b20caf0 | 1357 | Lisp_Object arglist[1]; |
1ab256cb RM |
1358 | |
1359 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1360 | set_buffer_internal (b); | |
dcdffbf6 RS |
1361 | |
1362 | /* First run the query functions; if any query is answered no, | |
1363 | don't kill the buffer. */ | |
5b20caf0 | 1364 | arglist[0] = Qkill_buffer_query_functions; |
09706e1f KR |
1365 | tem = Frun_hook_with_args_until_failure (1, arglist); |
1366 | if (NILP (tem)) | |
5b20caf0 | 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 | 1686 | if (EQ (buffer, Fwindow_buffer (selected_window))) |
fab45703 NR |
1687 | { |
1688 | if (NILP (norecord) && !EQ (buffer, XCDR (XCAR (Vbuffer_alist)))) | |
1689 | record_buffer (buffer); | |
1690 | /* Basically a NOP. Avoid signalling an error if the selected window | |
1691 | is dedicated, or a minibuffer, ... */ | |
1692 | return Fset_buffer (buffer); | |
1693 | } | |
27c6b98e | 1694 | |
2594e0fd RS |
1695 | err = no_switch_window (selected_window); |
1696 | if (err) error (err); | |
1697 | ||
1698 | return switch_to_buffer_1 (buffer, norecord); | |
1699 | } | |
1700 | ||
cd0c235a | 1701 | DEFUN ("pop-to-buffer", Fpop_to_buffer, Spop_to_buffer, 1, 3, 0, |
7ee72033 | 1702 | doc: /* Select buffer BUFFER in some window, preferably a different one. |
a6dced2a LT |
1703 | BUFFER may be a buffer, a string \(a buffer name), or nil. |
1704 | If BUFFER is a string which is not the name of an existing buffer, | |
1705 | then this function creates a buffer with that name. | |
1706 | If BUFFER is nil, then it chooses some other buffer. | |
018ba359 | 1707 | If `pop-up-windows' is non-nil, windows can be split to do this. |
e198ba87 | 1708 | If optional second arg OTHER-WINDOW is non-nil, insist on finding another |
ae47339f RS |
1709 | window even if BUFFER is already visible in the selected window, |
1710 | and ignore `same-window-regexps' and `same-window-buffer-names'. | |
a6dced2a | 1711 | This function returns the buffer it switched to. |
018ba359 PJ |
1712 | This uses the function `display-buffer' as a subroutine; see the documentation |
1713 | of `display-buffer' for additional customization information. | |
1714 | ||
1715 | Optional third arg NORECORD non-nil means | |
7ee72033 MB |
1716 | do not put this buffer at the front of the list of recently selected ones. */) |
1717 | (buffer, other_window, norecord) | |
6d12711f | 1718 | Lisp_Object buffer, other_window, norecord; |
1ab256cb RM |
1719 | { |
1720 | register Lisp_Object buf; | |
a25f13ae | 1721 | if (NILP (buffer)) |
773fbdb9 | 1722 | buf = Fother_buffer (Fcurrent_buffer (), Qnil, Qnil); |
1ab256cb | 1723 | else |
7c2087ee | 1724 | { |
a25f13ae | 1725 | buf = Fget_buffer (buffer); |
7c2087ee RS |
1726 | if (NILP (buf)) |
1727 | { | |
a25f13ae | 1728 | buf = Fget_buffer_create (buffer); |
7c2087ee RS |
1729 | Fset_buffer_major_mode (buf); |
1730 | } | |
1731 | } | |
1ab256cb | 1732 | Fset_buffer (buf); |
f1321dc3 | 1733 | Fselect_window (Fdisplay_buffer (buf, other_window, Qnil), norecord); |
e8b3a22d | 1734 | return buf; |
1ab256cb RM |
1735 | } |
1736 | ||
1737 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, | |
7ee72033 MB |
1738 | doc: /* Return the current buffer as a Lisp object. */) |
1739 | () | |
1ab256cb RM |
1740 | { |
1741 | register Lisp_Object buf; | |
67180c6a | 1742 | XSETBUFFER (buf, current_buffer); |
1ab256cb RM |
1743 | return buf; |
1744 | } | |
1745 | \f | |
7ec44ec6 GM |
1746 | /* Set the current buffer to B. |
1747 | ||
1748 | We previously set windows_or_buffers_changed here to invalidate | |
1749 | global unchanged information in beg_unchanged and end_unchanged. | |
1750 | This is no longer necessary because we now compute unchanged | |
1751 | information on a buffer-basis. Every action affecting other | |
1752 | windows than the selected one requires a select_window at some | |
1753 | time, and that increments windows_or_buffers_changed. */ | |
1ab256cb RM |
1754 | |
1755 | void | |
1756 | set_buffer_internal (b) | |
1757 | register struct buffer *b; | |
1758 | { | |
b5a225b4 | 1759 | if (current_buffer != b) |
7ec44ec6 | 1760 | set_buffer_internal_1 (b); |
c7aa5005 KH |
1761 | } |
1762 | ||
1763 | /* Set the current buffer to B, and do not set windows_or_buffers_changed. | |
1764 | This is used by redisplay. */ | |
1765 | ||
1766 | void | |
1767 | set_buffer_internal_1 (b) | |
1768 | register struct buffer *b; | |
1769 | { | |
1770 | register struct buffer *old_buf; | |
1771 | register Lisp_Object tail, valcontents; | |
1772 | Lisp_Object tem; | |
1773 | ||
b86af064 | 1774 | #ifdef USE_MMAP_FOR_BUFFERS |
684b01ee | 1775 | if (b->text->beg == NULL) |
b86af064 GM |
1776 | enlarge_buffer_text (b, 0); |
1777 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
177c0ea7 | 1778 | |
c7aa5005 KH |
1779 | if (current_buffer == b) |
1780 | return; | |
1781 | ||
1ab256cb RM |
1782 | old_buf = current_buffer; |
1783 | current_buffer = b; | |
1784 | last_known_column_point = -1; /* invalidate indentation cache */ | |
1785 | ||
336cd056 RS |
1786 | if (old_buf) |
1787 | { | |
1788 | /* Put the undo list back in the base buffer, so that it appears | |
1789 | that an indirect buffer shares the undo list of its base. */ | |
1790 | if (old_buf->base_buffer) | |
1791 | old_buf->base_buffer->undo_list = old_buf->undo_list; | |
1792 | ||
1793 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1794 | when it is not current, update them now. */ | |
1795 | if (! NILP (old_buf->pt_marker)) | |
1796 | { | |
1797 | Lisp_Object obuf; | |
1798 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1799 | set_marker_both (old_buf->pt_marker, obuf, |
1800 | BUF_PT (old_buf), BUF_PT_BYTE (old_buf)); | |
336cd056 RS |
1801 | } |
1802 | if (! NILP (old_buf->begv_marker)) | |
1803 | { | |
1804 | Lisp_Object obuf; | |
1805 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1806 | set_marker_both (old_buf->begv_marker, obuf, |
1807 | BUF_BEGV (old_buf), BUF_BEGV_BYTE (old_buf)); | |
336cd056 RS |
1808 | } |
1809 | if (! NILP (old_buf->zv_marker)) | |
1810 | { | |
1811 | Lisp_Object obuf; | |
1812 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1813 | set_marker_both (old_buf->zv_marker, obuf, |
1814 | BUF_ZV (old_buf), BUF_ZV_BYTE (old_buf)); | |
336cd056 RS |
1815 | } |
1816 | } | |
1817 | ||
1818 | /* Get the undo list from the base buffer, so that it appears | |
1819 | that an indirect buffer shares the undo list of its base. */ | |
1820 | if (b->base_buffer) | |
1821 | b->undo_list = b->base_buffer->undo_list; | |
1822 | ||
1823 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1824 | when it is not current, fetch them now. */ | |
1825 | if (! NILP (b->pt_marker)) | |
3f236a40 RS |
1826 | { |
1827 | BUF_PT (b) = marker_position (b->pt_marker); | |
1828 | BUF_PT_BYTE (b) = marker_byte_position (b->pt_marker); | |
1829 | } | |
336cd056 | 1830 | if (! NILP (b->begv_marker)) |
3f236a40 RS |
1831 | { |
1832 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1833 | BUF_BEGV_BYTE (b) = marker_byte_position (b->begv_marker); | |
1834 | } | |
336cd056 | 1835 | if (! NILP (b->zv_marker)) |
3f236a40 RS |
1836 | { |
1837 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1838 | BUF_ZV_BYTE (b) = marker_byte_position (b->zv_marker); | |
1839 | } | |
336cd056 | 1840 | |
1ab256cb RM |
1841 | /* Look down buffer's list of local Lisp variables |
1842 | to find and update any that forward into C variables. */ | |
1843 | ||
65745fad | 1844 | for (tail = b->local_var_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1845 | { |
f5c1dd0d | 1846 | valcontents = SYMBOL_VALUE (XCAR (XCAR (tail))); |
a7a60ce9 KH |
1847 | if ((BUFFER_LOCAL_VALUEP (valcontents) |
1848 | || SOME_BUFFER_LOCAL_VALUEP (valcontents)) | |
3d871c85 | 1849 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->realvalue, |
a7a60ce9 | 1850 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
1ab256cb RM |
1851 | /* Just reference the variable |
1852 | to cause it to become set for this buffer. */ | |
7539e11f | 1853 | Fsymbol_value (XCAR (XCAR (tail))); |
1ab256cb RM |
1854 | } |
1855 | ||
1856 | /* Do the same with any others that were local to the previous buffer */ | |
1857 | ||
1858 | if (old_buf) | |
65745fad | 1859 | for (tail = old_buf->local_var_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1860 | { |
f5c1dd0d | 1861 | valcontents = SYMBOL_VALUE (XCAR (XCAR (tail))); |
a7a60ce9 KH |
1862 | if ((BUFFER_LOCAL_VALUEP (valcontents) |
1863 | || SOME_BUFFER_LOCAL_VALUEP (valcontents)) | |
3d871c85 | 1864 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->realvalue, |
a7a60ce9 | 1865 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
1ab256cb RM |
1866 | /* Just reference the variable |
1867 | to cause it to become set for this buffer. */ | |
7539e11f | 1868 | Fsymbol_value (XCAR (XCAR (tail))); |
1ab256cb RM |
1869 | } |
1870 | } | |
1871 | ||
336cd056 | 1872 | /* Switch to buffer B temporarily for redisplay purposes. |
bbbe9545 | 1873 | This avoids certain things that don't need to be done within redisplay. */ |
336cd056 RS |
1874 | |
1875 | void | |
1876 | set_buffer_temp (b) | |
1877 | struct buffer *b; | |
1878 | { | |
1879 | register struct buffer *old_buf; | |
1880 | ||
1881 | if (current_buffer == b) | |
1882 | return; | |
1883 | ||
1884 | old_buf = current_buffer; | |
1885 | current_buffer = b; | |
1886 | ||
1887 | if (old_buf) | |
1888 | { | |
1889 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1890 | when it is not current, update them now. */ | |
1891 | if (! NILP (old_buf->pt_marker)) | |
1892 | { | |
1893 | Lisp_Object obuf; | |
1894 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1895 | set_marker_both (old_buf->pt_marker, obuf, |
1896 | BUF_PT (old_buf), BUF_PT_BYTE (old_buf)); | |
336cd056 RS |
1897 | } |
1898 | if (! NILP (old_buf->begv_marker)) | |
1899 | { | |
1900 | Lisp_Object obuf; | |
1901 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1902 | set_marker_both (old_buf->begv_marker, obuf, |
1903 | BUF_BEGV (old_buf), BUF_BEGV_BYTE (old_buf)); | |
336cd056 RS |
1904 | } |
1905 | if (! NILP (old_buf->zv_marker)) | |
1906 | { | |
1907 | Lisp_Object obuf; | |
1908 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1909 | set_marker_both (old_buf->zv_marker, obuf, |
1910 | BUF_ZV (old_buf), BUF_ZV_BYTE (old_buf)); | |
336cd056 RS |
1911 | } |
1912 | } | |
1913 | ||
1914 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1915 | when it is not current, fetch them now. */ | |
1916 | if (! NILP (b->pt_marker)) | |
3f236a40 RS |
1917 | { |
1918 | BUF_PT (b) = marker_position (b->pt_marker); | |
1919 | BUF_PT_BYTE (b) = marker_byte_position (b->pt_marker); | |
1920 | } | |
336cd056 | 1921 | if (! NILP (b->begv_marker)) |
3f236a40 RS |
1922 | { |
1923 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1924 | BUF_BEGV_BYTE (b) = marker_byte_position (b->begv_marker); | |
1925 | } | |
336cd056 | 1926 | if (! NILP (b->zv_marker)) |
3f236a40 RS |
1927 | { |
1928 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1929 | BUF_ZV_BYTE (b) = marker_byte_position (b->zv_marker); | |
1930 | } | |
336cd056 RS |
1931 | } |
1932 | ||
1ab256cb | 1933 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, |
7ee72033 | 1934 | doc: /* Make the buffer BUFFER current for editing operations. |
018ba359 PJ |
1935 | BUFFER may be a buffer or the name of an existing buffer. |
1936 | See also `save-excursion' when you want to make a buffer current temporarily. | |
1937 | This function does not display the buffer, so its effect ends | |
1938 | when the current command terminates. | |
7ee72033 MB |
1939 | Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently. */) |
1940 | (buffer) | |
a25f13ae | 1941 | register Lisp_Object buffer; |
1ab256cb | 1942 | { |
a25f13ae KH |
1943 | register Lisp_Object buf; |
1944 | buf = Fget_buffer (buffer); | |
1945 | if (NILP (buf)) | |
1946 | nsberror (buffer); | |
1947 | if (NILP (XBUFFER (buf)->name)) | |
1ab256cb | 1948 | error ("Selecting deleted buffer"); |
a25f13ae KH |
1949 | set_buffer_internal (XBUFFER (buf)); |
1950 | return buf; | |
1ab256cb | 1951 | } |
d0628b06 RS |
1952 | |
1953 | /* Set the current buffer to BUFFER provided it is alive. */ | |
1954 | ||
1955 | Lisp_Object | |
1956 | set_buffer_if_live (buffer) | |
1957 | Lisp_Object buffer; | |
1958 | { | |
1959 | if (! NILP (XBUFFER (buffer)->name)) | |
1960 | Fset_buffer (buffer); | |
1961 | return Qnil; | |
1962 | } | |
1ab256cb RM |
1963 | \f |
1964 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, | |
1965 | Sbarf_if_buffer_read_only, 0, 0, 0, | |
7ee72033 MB |
1966 | doc: /* Signal a `buffer-read-only' error if the current buffer is read-only. */) |
1967 | () | |
1ab256cb | 1968 | { |
a96b68f1 RS |
1969 | if (!NILP (current_buffer->read_only) |
1970 | && NILP (Vinhibit_read_only)) | |
4c4dc0b0 | 1971 | xsignal1 (Qbuffer_read_only, Fcurrent_buffer ()); |
1ab256cb RM |
1972 | return Qnil; |
1973 | } | |
1974 | ||
1975 | DEFUN ("bury-buffer", Fbury_buffer, Sbury_buffer, 0, 1, "", | |
7ee72033 | 1976 | doc: /* Put BUFFER at the end of the list of all buffers. |
018ba359 PJ |
1977 | There it is the least likely candidate for `other-buffer' to return; |
1978 | thus, the least likely buffer for \\[switch-to-buffer] to select by default. | |
39971188 | 1979 | You can specify a buffer name as BUFFER, or an actual buffer object. |
018ba359 PJ |
1980 | If BUFFER is nil or omitted, bury the current buffer. |
1981 | Also, if BUFFER is nil or omitted, remove the current buffer from the | |
7ee72033 MB |
1982 | selected window if it is displayed there. */) |
1983 | (buffer) | |
a2428fa2 | 1984 | register Lisp_Object buffer; |
1ab256cb | 1985 | { |
b271272a | 1986 | /* Figure out what buffer we're going to bury. */ |
a2428fa2 | 1987 | if (NILP (buffer)) |
a5611885 | 1988 | { |
c58dab63 | 1989 | Lisp_Object tem; |
a2428fa2 | 1990 | XSETBUFFER (buffer, current_buffer); |
0a63b212 | 1991 | |
c58dab63 | 1992 | tem = Fwindow_buffer (selected_window); |
0a63b212 | 1993 | /* If we're burying the current buffer, unshow it. */ |
c58dab63 | 1994 | if (EQ (buffer, tem)) |
a78e0303 PJ |
1995 | { |
1996 | if (NILP (Fwindow_dedicated_p (selected_window))) | |
1997 | Fswitch_to_buffer (Fother_buffer (buffer, Qnil, Qnil), Qnil); | |
1998 | else if (NILP (XWINDOW (selected_window)->parent)) | |
1999 | Ficonify_frame (Fwindow_frame (selected_window)); | |
2000 | else | |
2001 | Fdelete_window (selected_window); | |
2002 | } | |
a5611885 | 2003 | } |
1ab256cb RM |
2004 | else |
2005 | { | |
2006 | Lisp_Object buf1; | |
177c0ea7 | 2007 | |
a2428fa2 | 2008 | buf1 = Fget_buffer (buffer); |
265a9e55 | 2009 | if (NILP (buf1)) |
a2428fa2 EN |
2010 | nsberror (buffer); |
2011 | buffer = buf1; | |
b271272a JB |
2012 | } |
2013 | ||
a1a8b28e GM |
2014 | /* Move buffer to the end of the buffer list. Do nothing if the |
2015 | buffer is killed. */ | |
2016 | if (!NILP (XBUFFER (buffer)->name)) | |
2017 | { | |
2018 | Lisp_Object aelt, link; | |
b271272a | 2019 | |
a1a8b28e GM |
2020 | aelt = Frassq (buffer, Vbuffer_alist); |
2021 | link = Fmemq (aelt, Vbuffer_alist); | |
2022 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); | |
f3fbd155 | 2023 | XSETCDR (link, Qnil); |
a1a8b28e | 2024 | Vbuffer_alist = nconc2 (Vbuffer_alist, link); |
1ab256cb | 2025 | |
6c488ddb RS |
2026 | /* Removing BUFFER from frame-specific lists |
2027 | has the effect of putting BUFFER at the end | |
2028 | of the combined list in each frame. */ | |
2029 | frames_discard_buffer (buffer); | |
a1a8b28e | 2030 | } |
dec989eb | 2031 | |
1ab256cb RM |
2032 | return Qnil; |
2033 | } | |
2034 | \f | |
c922bc55 | 2035 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
7ee72033 | 2036 | doc: /* Delete the entire contents of the current buffer. |
018ba359 | 2037 | Any narrowing restriction in effect (see `narrow-to-region') is removed, |
7ee72033 MB |
2038 | so the buffer is truly empty after this. */) |
2039 | () | |
1ab256cb RM |
2040 | { |
2041 | Fwiden (); | |
c0d9a0c3 GM |
2042 | |
2043 | del_range (BEG, Z); | |
c280bc6a | 2044 | |
1ab256cb RM |
2045 | current_buffer->last_window_start = 1; |
2046 | /* Prevent warnings, or suspension of auto saving, that would happen | |
2047 | if future size is less than past size. Use of erase-buffer | |
2048 | implies that the future text is not really related to the past text. */ | |
8d7a4592 | 2049 | XSETFASTINT (current_buffer->save_length, 0); |
1ab256cb RM |
2050 | return Qnil; |
2051 | } | |
2052 | ||
01136e9b | 2053 | void |
1ab256cb RM |
2054 | validate_region (b, e) |
2055 | register Lisp_Object *b, *e; | |
2056 | { | |
b7826503 PJ |
2057 | CHECK_NUMBER_COERCE_MARKER (*b); |
2058 | CHECK_NUMBER_COERCE_MARKER (*e); | |
1ab256cb RM |
2059 | |
2060 | if (XINT (*b) > XINT (*e)) | |
2061 | { | |
03192067 KH |
2062 | Lisp_Object tem; |
2063 | tem = *b; *b = *e; *e = tem; | |
1ab256cb RM |
2064 | } |
2065 | ||
2066 | if (!(BEGV <= XINT (*b) && XINT (*b) <= XINT (*e) | |
2067 | && XINT (*e) <= ZV)) | |
2068 | args_out_of_range (*b, *e); | |
2069 | } | |
2070 | \f | |
b05525fa RS |
2071 | /* Advance BYTE_POS up to a character boundary |
2072 | and return the adjusted position. */ | |
2073 | ||
2074 | static int | |
2075 | advance_to_char_boundary (byte_pos) | |
2076 | int byte_pos; | |
2077 | { | |
f8449323 | 2078 | int c; |
b05525fa | 2079 | |
f8449323 RS |
2080 | if (byte_pos == BEG) |
2081 | /* Beginning of buffer is always a character boundary. */ | |
6d70a280 | 2082 | return BEG; |
f8449323 RS |
2083 | |
2084 | c = FETCH_BYTE (byte_pos); | |
2085 | if (! CHAR_HEAD_P (c)) | |
b05525fa | 2086 | { |
1be6387d | 2087 | /* We should advance BYTE_POS only when C is a constituent of a |
f8449323 | 2088 | multibyte sequence. */ |
a9bcded1 KH |
2089 | int orig_byte_pos = byte_pos; |
2090 | ||
2091 | do | |
2092 | { | |
2093 | byte_pos--; | |
2094 | c = FETCH_BYTE (byte_pos); | |
2095 | } | |
2096 | while (! CHAR_HEAD_P (c) && byte_pos > BEG); | |
f8449323 | 2097 | INC_POS (byte_pos); |
a9bcded1 KH |
2098 | if (byte_pos < orig_byte_pos) |
2099 | byte_pos = orig_byte_pos; | |
f8449323 RS |
2100 | /* If C is a constituent of a multibyte sequence, BYTE_POS was |
2101 | surely advance to the correct character boundary. If C is | |
2102 | not, BYTE_POS was unchanged. */ | |
b05525fa RS |
2103 | } |
2104 | ||
20773569 | 2105 | return byte_pos; |
b05525fa RS |
2106 | } |
2107 | ||
3ac81adb RS |
2108 | DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte, Sset_buffer_multibyte, |
2109 | 1, 1, 0, | |
7ee72033 | 2110 | doc: /* Set the multibyte flag of the current buffer to FLAG. |
018ba359 PJ |
2111 | If FLAG is t, this makes the buffer a multibyte buffer. |
2112 | If FLAG is nil, this makes the buffer a single-byte buffer. | |
2113 | The buffer contents remain unchanged as a sequence of bytes | |
fc1d15f6 KH |
2114 | but the contents viewed as characters do change. |
2115 | If the multibyte flag was really changed, undo information of the | |
2116 | current buffer is cleared. */) | |
7ee72033 | 2117 | (flag) |
3ac81adb RS |
2118 | Lisp_Object flag; |
2119 | { | |
65745fad | 2120 | struct Lisp_Marker *tail, *markers; |
abc9d959 | 2121 | struct buffer *other; |
458c8af4 | 2122 | int begv, zv; |
8d1203ea | 2123 | int narrowed = (BEG != BEGV || Z != ZV); |
ed00559d | 2124 | int modified_p = !NILP (Fbuffer_modified_p (Qnil)); |
38babc07 KS |
2125 | Lisp_Object old_undo = current_buffer->undo_list; |
2126 | struct gcpro gcpro1; | |
3ac81adb | 2127 | |
6e553d5e RS |
2128 | if (current_buffer->base_buffer) |
2129 | error ("Cannot do `set-buffer-multibyte' on an indirect buffer"); | |
2130 | ||
70e77119 AS |
2131 | /* Do nothing if nothing actually changes. */ |
2132 | if (NILP (flag) == NILP (current_buffer->enable_multibyte_characters)) | |
2133 | return flag; | |
2134 | ||
38babc07 KS |
2135 | GCPRO1 (old_undo); |
2136 | ||
2137 | /* Don't record these buffer changes. We will put a special undo entry | |
2138 | instead. */ | |
2139 | current_buffer->undo_list = Qt; | |
b05525fa | 2140 | |
3ac81adb RS |
2141 | /* If the cached position is for this buffer, clear it out. */ |
2142 | clear_charpos_cache (current_buffer); | |
2143 | ||
458c8af4 KH |
2144 | if (NILP (flag)) |
2145 | begv = BEGV_BYTE, zv = ZV_BYTE; | |
2146 | else | |
2147 | begv = BEGV, zv = ZV; | |
2148 | ||
a9bcded1 KH |
2149 | if (narrowed) |
2150 | Fwiden (); | |
2151 | ||
3ac81adb RS |
2152 | if (NILP (flag)) |
2153 | { | |
a9bcded1 KH |
2154 | int pos, stop; |
2155 | unsigned char *p; | |
2156 | ||
3ac81adb RS |
2157 | /* Do this first, so it can use CHAR_TO_BYTE |
2158 | to calculate the old correspondences. */ | |
2159 | set_intervals_multibyte (0); | |
2160 | ||
2161 | current_buffer->enable_multibyte_characters = Qnil; | |
2162 | ||
2163 | Z = Z_BYTE; | |
2164 | BEGV = BEGV_BYTE; | |
2165 | ZV = ZV_BYTE; | |
2166 | GPT = GPT_BYTE; | |
2167 | TEMP_SET_PT_BOTH (PT_BYTE, PT_BYTE); | |
2168 | ||
60ebfdf3 | 2169 | |
65745fad SM |
2170 | for (tail = BUF_MARKERS (current_buffer); tail; tail = tail->next) |
2171 | tail->charpos = tail->bytepos; | |
a9bcded1 KH |
2172 | |
2173 | /* Convert multibyte form of 8-bit characters to unibyte. */ | |
2174 | pos = BEG; | |
2175 | stop = GPT; | |
2176 | p = BEG_ADDR; | |
2177 | while (1) | |
2178 | { | |
2179 | int c, bytes; | |
2180 | ||
2181 | if (pos == stop) | |
2182 | { | |
2183 | if (pos == Z) | |
2184 | break; | |
2185 | p = GAP_END_ADDR; | |
2186 | stop = Z; | |
2187 | } | |
2188 | if (MULTIBYTE_STR_AS_UNIBYTE_P (p, bytes)) | |
2189 | p += bytes, pos += bytes; | |
2190 | else | |
2191 | { | |
2192 | c = STRING_CHAR (p, stop - pos); | |
2193 | /* Delete all bytes for this 8-bit character but the | |
2194 | last one, and change the last one to the charcter | |
2195 | code. */ | |
2196 | bytes--; | |
2197 | del_range_2 (pos, pos, pos + bytes, pos + bytes, 0); | |
2198 | p = GAP_END_ADDR; | |
2199 | *p++ = c; | |
2200 | pos++; | |
2201 | if (begv > pos) | |
2202 | begv -= bytes; | |
2203 | if (zv > pos) | |
2204 | zv -= bytes; | |
2205 | stop = Z; | |
2206 | } | |
2207 | } | |
2208 | if (narrowed) | |
2209 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
3ac81adb RS |
2210 | } |
2211 | else | |
2212 | { | |
a9bcded1 KH |
2213 | int pt = PT; |
2214 | int pos, stop; | |
2215 | unsigned char *p; | |
2216 | ||
673c57d2 | 2217 | /* Be sure not to have a multibyte sequence striding over the GAP. |
a9bcded1 KH |
2218 | Ex: We change this: "...abc\201 _GAP_ \241def..." |
2219 | to: "...abc _GAP_ \201\241def..." */ | |
673c57d2 KH |
2220 | |
2221 | if (GPT_BYTE > 1 && GPT_BYTE < Z_BYTE | |
2222 | && ! CHAR_HEAD_P (*(GAP_END_ADDR))) | |
2223 | { | |
2224 | unsigned char *p = GPT_ADDR - 1; | |
2225 | ||
2226 | while (! CHAR_HEAD_P (*p) && p > BEG_ADDR) p--; | |
2227 | if (BASE_LEADING_CODE_P (*p)) | |
2228 | { | |
2229 | int new_gpt = GPT_BYTE - (GPT_ADDR - p); | |
2230 | ||
2231 | move_gap_both (new_gpt, new_gpt); | |
2232 | } | |
2233 | } | |
2234 | ||
a9bcded1 KH |
2235 | /* Make the buffer contents valid as multibyte by converting |
2236 | 8-bit characters to multibyte form. */ | |
2237 | pos = BEG; | |
2238 | stop = GPT; | |
2239 | p = BEG_ADDR; | |
2240 | while (1) | |
2241 | { | |
2242 | int bytes; | |
2243 | ||
2244 | if (pos == stop) | |
2245 | { | |
2246 | if (pos == Z) | |
2247 | break; | |
2248 | p = GAP_END_ADDR; | |
2249 | stop = Z; | |
2250 | } | |
177c0ea7 | 2251 | |
a9bcded1 KH |
2252 | if (UNIBYTE_STR_AS_MULTIBYTE_P (p, stop - pos, bytes)) |
2253 | p += bytes, pos += bytes; | |
2254 | else | |
2255 | { | |
2256 | unsigned char tmp[MAX_MULTIBYTE_LENGTH]; | |
2257 | ||
2258 | bytes = CHAR_STRING (*p, tmp); | |
2259 | *p = tmp[0]; | |
2260 | TEMP_SET_PT_BOTH (pos + 1, pos + 1); | |
2261 | bytes--; | |
2262 | insert_1_both (tmp + 1, bytes, bytes, 1, 0, 0); | |
2263 | /* Now the gap is after the just inserted data. */ | |
2264 | pos = GPT; | |
2265 | p = GAP_END_ADDR; | |
2266 | if (pos <= begv) | |
2267 | begv += bytes; | |
2268 | if (pos <= zv) | |
2269 | zv += bytes; | |
2270 | if (pos <= pt) | |
2271 | pt += bytes; | |
2272 | stop = Z; | |
2273 | } | |
2274 | } | |
2275 | ||
2276 | if (pt != PT) | |
2277 | TEMP_SET_PT (pt); | |
2278 | ||
2279 | if (narrowed) | |
2280 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
2281 | ||
3ac81adb RS |
2282 | /* Do this first, so that chars_in_text asks the right question. |
2283 | set_intervals_multibyte needs it too. */ | |
2284 | current_buffer->enable_multibyte_characters = Qt; | |
2285 | ||
b05525fa | 2286 | GPT_BYTE = advance_to_char_boundary (GPT_BYTE); |
3ac81adb | 2287 | GPT = chars_in_text (BEG_ADDR, GPT_BYTE - BEG_BYTE) + BEG; |
b05525fa | 2288 | |
673c57d2 | 2289 | Z = chars_in_text (GAP_END_ADDR, Z_BYTE - GPT_BYTE) + GPT; |
b05525fa RS |
2290 | |
2291 | BEGV_BYTE = advance_to_char_boundary (BEGV_BYTE); | |
3ac81adb | 2292 | if (BEGV_BYTE > GPT_BYTE) |
673c57d2 | 2293 | BEGV = chars_in_text (GAP_END_ADDR, BEGV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2294 | else |
2295 | BEGV = chars_in_text (BEG_ADDR, BEGV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2296 | |
2297 | ZV_BYTE = advance_to_char_boundary (ZV_BYTE); | |
3ac81adb | 2298 | if (ZV_BYTE > GPT_BYTE) |
673c57d2 | 2299 | ZV = chars_in_text (GAP_END_ADDR, ZV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2300 | else |
2301 | ZV = chars_in_text (BEG_ADDR, ZV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2302 | |
2303 | { | |
2304 | int pt_byte = advance_to_char_boundary (PT_BYTE); | |
2305 | int pt; | |
2306 | ||
2307 | if (pt_byte > GPT_BYTE) | |
673c57d2 | 2308 | pt = chars_in_text (GAP_END_ADDR, pt_byte - GPT_BYTE) + GPT; |
b05525fa RS |
2309 | else |
2310 | pt = chars_in_text (BEG_ADDR, pt_byte - BEG_BYTE) + BEG; | |
2311 | TEMP_SET_PT_BOTH (pt, pt_byte); | |
2312 | } | |
3ac81adb RS |
2313 | |
2314 | tail = markers = BUF_MARKERS (current_buffer); | |
95fb069b RS |
2315 | |
2316 | /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from | |
2317 | getting confused by the markers that have not yet been updated. | |
2318 | It is also a signal that it should never create a marker. */ | |
65745fad | 2319 | BUF_MARKERS (current_buffer) = NULL; |
3ac81adb | 2320 | |
65745fad | 2321 | for (; tail; tail = tail->next) |
3ac81adb | 2322 | { |
65745fad SM |
2323 | tail->bytepos = advance_to_char_boundary (tail->bytepos); |
2324 | tail->charpos = BYTE_TO_CHAR (tail->bytepos); | |
3ac81adb | 2325 | } |
b69f9797 RS |
2326 | |
2327 | /* Make sure no markers were put on the chain | |
2328 | while the chain value was incorrect. */ | |
65745fad | 2329 | if (BUF_MARKERS (current_buffer)) |
b69f9797 RS |
2330 | abort (); |
2331 | ||
3ac81adb RS |
2332 | BUF_MARKERS (current_buffer) = markers; |
2333 | ||
2334 | /* Do this last, so it can calculate the new correspondences | |
2335 | between chars and bytes. */ | |
2336 | set_intervals_multibyte (1); | |
2337 | } | |
2338 | ||
38babc07 KS |
2339 | if (!EQ (old_undo, Qt)) |
2340 | { | |
2341 | /* Represent all the above changes by a special undo entry. */ | |
2342 | extern Lisp_Object Qapply; | |
2343 | Lisp_Object args[3]; | |
2344 | args[0] = Qapply; | |
2345 | args[1] = intern ("set-buffer-multibyte"); | |
2346 | args[2] = NILP (flag) ? Qt : Qnil; | |
2347 | current_buffer->undo_list = Fcons (Flist (3, args), old_undo); | |
2348 | } | |
2349 | ||
2350 | UNGCPRO; | |
a9bcded1 | 2351 | |
724b203f GM |
2352 | /* Changing the multibyteness of a buffer means that all windows |
2353 | showing that buffer must be updated thoroughly. */ | |
2354 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2355 | ++windows_or_buffers_changed; | |
2356 | ||
abc9d959 RS |
2357 | /* Copy this buffer's new multibyte status |
2358 | into all of its indirect buffers. */ | |
2359 | for (other = all_buffers; other; other = other->next) | |
2360 | if (other->base_buffer == current_buffer && !NILP (other->name)) | |
724b203f GM |
2361 | { |
2362 | other->enable_multibyte_characters | |
2363 | = current_buffer->enable_multibyte_characters; | |
2364 | other->prevent_redisplay_optimizations_p = 1; | |
2365 | } | |
abc9d959 | 2366 | |
ed00559d KH |
2367 | /* Restore the modifiedness of the buffer. */ |
2368 | if (!modified_p && !NILP (Fbuffer_modified_p (Qnil))) | |
2369 | Fset_buffer_modified_p (Qnil); | |
2370 | ||
2a2b50a9 | 2371 | #ifdef subprocesses |
172f9454 KH |
2372 | /* Update coding systems of this buffer's process (if any). */ |
2373 | { | |
2374 | Lisp_Object process; | |
2375 | ||
2376 | process = Fget_buffer_process (Fcurrent_buffer ()); | |
2377 | if (PROCESSP (process)) | |
2378 | setup_process_coding_systems (process); | |
2379 | } | |
2a2b50a9 | 2380 | #endif /* subprocesses */ |
172f9454 | 2381 | |
3ac81adb RS |
2382 | return flag; |
2383 | } | |
2384 | \f | |
1ab256cb | 2385 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, Skill_all_local_variables, |
efc7e75f | 2386 | 0, 0, 0, |
7ee72033 | 2387 | doc: /* Switch to Fundamental mode by killing current buffer's local variables. |
018ba359 PJ |
2388 | Most local variable bindings are eliminated so that the default values |
2389 | become effective once more. Also, the syntax table is set from | |
2390 | `standard-syntax-table', the local keymap is set to nil, | |
2391 | and the abbrev table from `fundamental-mode-abbrev-table'. | |
2392 | This function also forces redisplay of the mode line. | |
2393 | ||
2394 | Every function to select a new major mode starts by | |
2395 | calling this function. | |
2396 | ||
2397 | As a special exception, local variables whose names have | |
2398 | a non-nil `permanent-local' property are not eliminated by this function. | |
2399 | ||
2400 | The first thing this function does is run | |
7ee72033 MB |
2401 | the normal hook `change-major-mode-hook'. */) |
2402 | () | |
1ab256cb RM |
2403 | { |
2404 | register Lisp_Object alist, sym, tem; | |
2405 | Lisp_Object oalist; | |
7410477a | 2406 | |
fd186f07 | 2407 | if (!NILP (Vrun_hooks)) |
43ed3b8d | 2408 | call1 (Vrun_hooks, Qchange_major_mode_hook); |
1ab256cb RM |
2409 | oalist = current_buffer->local_var_alist; |
2410 | ||
2f3f993b RS |
2411 | /* Make sure none of the bindings in oalist |
2412 | remain swapped in, in their symbols. */ | |
1ab256cb | 2413 | |
2f3f993b | 2414 | swap_out_buffer_local_variables (current_buffer); |
1ab256cb RM |
2415 | |
2416 | /* Actually eliminate all local bindings of this buffer. */ | |
2417 | ||
13de9290 | 2418 | reset_buffer_local_variables (current_buffer, 0); |
1ab256cb | 2419 | |
1ab256cb RM |
2420 | /* Any which are supposed to be permanent, |
2421 | make local again, with the same values they had. */ | |
177c0ea7 | 2422 | |
7539e11f | 2423 | for (alist = oalist; !NILP (alist); alist = XCDR (alist)) |
1ab256cb | 2424 | { |
7539e11f | 2425 | sym = XCAR (XCAR (alist)); |
1ab256cb | 2426 | tem = Fget (sym, Qpermanent_local); |
265a9e55 | 2427 | if (! NILP (tem)) |
01050cb5 RM |
2428 | { |
2429 | Fmake_local_variable (sym); | |
7539e11f | 2430 | Fset (sym, XCDR (XCAR (alist))); |
01050cb5 | 2431 | } |
1ab256cb RM |
2432 | } |
2433 | ||
2434 | /* Force mode-line redisplay. Useful here because all major mode | |
2435 | commands call this function. */ | |
2436 | update_mode_lines++; | |
2437 | ||
2438 | return Qnil; | |
2439 | } | |
2f3f993b RS |
2440 | |
2441 | /* Make sure no local variables remain set up with buffer B | |
2442 | for their current values. */ | |
2443 | ||
2444 | static void | |
2445 | swap_out_buffer_local_variables (b) | |
2446 | struct buffer *b; | |
2447 | { | |
2448 | Lisp_Object oalist, alist, sym, tem, buffer; | |
2449 | ||
2450 | XSETBUFFER (buffer, b); | |
2451 | oalist = b->local_var_alist; | |
2452 | ||
7539e11f | 2453 | for (alist = oalist; !NILP (alist); alist = XCDR (alist)) |
2f3f993b | 2454 | { |
7539e11f | 2455 | sym = XCAR (XCAR (alist)); |
2f3f993b RS |
2456 | |
2457 | /* Need not do anything if some other buffer's binding is now encached. */ | |
f5c1dd0d | 2458 | tem = XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym))->buffer; |
8801a864 | 2459 | if (BUFFERP (tem) && XBUFFER (tem) == current_buffer) |
2f3f993b RS |
2460 | { |
2461 | /* Symbol is set up for this buffer's old local value. | |
2462 | Set it up for the current buffer with the default value. */ | |
2463 | ||
f5c1dd0d | 2464 | tem = XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym))->cdr; |
2f3f993b RS |
2465 | /* Store the symbol's current value into the alist entry |
2466 | it is currently set up for. This is so that, if the | |
2467 | local is marked permanent, and we make it local again | |
2468 | later in Fkill_all_local_variables, we don't lose the value. */ | |
f3fbd155 KR |
2469 | XSETCDR (XCAR (tem), |
2470 | do_symval_forwarding (XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym))->realvalue)); | |
2f3f993b | 2471 | /* Switch to the symbol's default-value alist entry. */ |
f3fbd155 | 2472 | XSETCAR (tem, tem); |
2f3f993b | 2473 | /* Mark it as current for buffer B. */ |
f5c1dd0d | 2474 | XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym))->buffer = buffer; |
2f3f993b | 2475 | /* Store the current value into any forwarding in the symbol. */ |
3d871c85 | 2476 | store_symval_forwarding (sym, |
f5c1dd0d | 2477 | XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym))->realvalue, |
9b3a7dad | 2478 | XCDR (tem), NULL); |
2f3f993b RS |
2479 | } |
2480 | } | |
2481 | } | |
1ab256cb | 2482 | \f |
2eec3b4e | 2483 | /* Find all the overlays in the current buffer that contain position POS. |
177c0ea7 | 2484 | Return the number found, and store them in a vector in *VEC_PTR. |
2eec3b4e | 2485 | Store in *LEN_PTR the size allocated for the vector. |
52f8ec73 | 2486 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
624d2678 | 2487 | or ZV if there are no more overlays between POS and ZV. |
bbbe9545 | 2488 | Store in *PREV_PTR the previous position before POS where an overlay ends, |
413e06a4 | 2489 | or where an overlay starts which ends at or after POS; |
624d2678 | 2490 | or BEGV if there are no such overlays from BEGV to POS. |
239c932b | 2491 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. |
2eec3b4e RS |
2492 | |
2493 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
2494 | when this function is called. |
2495 | ||
2496 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2497 | If EXTEND is zero, we never extend the vector, | |
2498 | and we store only as many overlays as will fit. | |
ac869cf7 MB |
2499 | But we still return the total number of overlays. |
2500 | ||
2501 | If CHANGE_REQ is true, then any position written into *PREV_PTR or | |
2502 | *NEXT_PTR is guaranteed to be not equal to POS, unless it is the | |
2503 | default (BEGV or ZV). */ | |
2eec3b4e RS |
2504 | |
2505 | int | |
ac869cf7 | 2506 | overlays_at (pos, extend, vec_ptr, len_ptr, next_ptr, prev_ptr, change_req) |
c2d5b10f | 2507 | EMACS_INT pos; |
61d54cd5 | 2508 | int extend; |
2eec3b4e RS |
2509 | Lisp_Object **vec_ptr; |
2510 | int *len_ptr; | |
2511 | int *next_ptr; | |
239c932b | 2512 | int *prev_ptr; |
ac869cf7 | 2513 | int change_req; |
1ab256cb | 2514 | { |
2410d73a SM |
2515 | Lisp_Object overlay, start, end; |
2516 | struct Lisp_Overlay *tail; | |
2eec3b4e RS |
2517 | int idx = 0; |
2518 | int len = *len_ptr; | |
2519 | Lisp_Object *vec = *vec_ptr; | |
2520 | int next = ZV; | |
239c932b | 2521 | int prev = BEGV; |
61d54cd5 RS |
2522 | int inhibit_storing = 0; |
2523 | ||
2410d73a | 2524 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
2eec3b4e | 2525 | { |
239c932b | 2526 | int startpos, endpos; |
52f8ec73 | 2527 | |
2410d73a | 2528 | XSETMISC (overlay, tail); |
1ab256cb | 2529 | |
2eec3b4e RS |
2530 | start = OVERLAY_START (overlay); |
2531 | end = OVERLAY_END (overlay); | |
239c932b RS |
2532 | endpos = OVERLAY_POSITION (end); |
2533 | if (endpos < pos) | |
2534 | { | |
2535 | if (prev < endpos) | |
2536 | prev = endpos; | |
2537 | break; | |
2538 | } | |
413e06a4 RS |
2539 | startpos = OVERLAY_POSITION (start); |
2540 | /* This one ends at or after POS | |
daa1c109 | 2541 | so its start counts for PREV_PTR if it's before POS. */ |
413e06a4 RS |
2542 | if (prev < startpos && startpos < pos) |
2543 | prev = startpos; | |
239c932b RS |
2544 | if (endpos == pos) |
2545 | continue; | |
2eec3b4e RS |
2546 | if (startpos <= pos) |
2547 | { | |
2548 | if (idx == len) | |
2549 | { | |
61d54cd5 RS |
2550 | /* The supplied vector is full. |
2551 | Either make it bigger, or don't store any more in it. */ | |
2552 | if (extend) | |
2553 | { | |
0552666b GM |
2554 | /* Make it work with an initial len == 0. */ |
2555 | len *= 2; | |
2556 | if (len == 0) | |
2557 | len = 4; | |
2558 | *len_ptr = len; | |
61d54cd5 RS |
2559 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2560 | *vec_ptr = vec; | |
2561 | } | |
2562 | else | |
2563 | inhibit_storing = 1; | |
2eec3b4e | 2564 | } |
61d54cd5 RS |
2565 | |
2566 | if (!inhibit_storing) | |
2567 | vec[idx] = overlay; | |
2568 | /* Keep counting overlays even if we can't return them all. */ | |
2569 | idx++; | |
2eec3b4e RS |
2570 | } |
2571 | else if (startpos < next) | |
2572 | next = startpos; | |
2573 | } | |
2574 | ||
2410d73a | 2575 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
1ab256cb | 2576 | { |
239c932b | 2577 | int startpos, endpos; |
52f8ec73 | 2578 | |
2410d73a | 2579 | XSETMISC (overlay, tail); |
2eec3b4e RS |
2580 | |
2581 | start = OVERLAY_START (overlay); | |
2582 | end = OVERLAY_END (overlay); | |
2583 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 2584 | if (pos < startpos) |
2eec3b4e RS |
2585 | { |
2586 | if (startpos < next) | |
2587 | next = startpos; | |
2588 | break; | |
2589 | } | |
239c932b RS |
2590 | endpos = OVERLAY_POSITION (end); |
2591 | if (pos < endpos) | |
2eec3b4e RS |
2592 | { |
2593 | if (idx == len) | |
2594 | { | |
61d54cd5 RS |
2595 | if (extend) |
2596 | { | |
4b0e44fc RS |
2597 | /* Make it work with an initial len == 0. */ |
2598 | len *= 2; | |
0552666b | 2599 | if (len == 0) |
4b0e44fc RS |
2600 | len = 4; |
2601 | *len_ptr = len; | |
61d54cd5 RS |
2602 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2603 | *vec_ptr = vec; | |
2604 | } | |
2605 | else | |
2606 | inhibit_storing = 1; | |
2eec3b4e | 2607 | } |
61d54cd5 RS |
2608 | |
2609 | if (!inhibit_storing) | |
2610 | vec[idx] = overlay; | |
2611 | idx++; | |
413e06a4 RS |
2612 | |
2613 | if (startpos < pos && startpos > prev) | |
2614 | prev = startpos; | |
2eec3b4e | 2615 | } |
239c932b RS |
2616 | else if (endpos < pos && endpos > prev) |
2617 | prev = endpos; | |
1d5f4c1d MB |
2618 | else if (endpos == pos && startpos > prev |
2619 | && (!change_req || startpos < pos)) | |
413e06a4 | 2620 | prev = startpos; |
1ab256cb RM |
2621 | } |
2622 | ||
239c932b RS |
2623 | if (next_ptr) |
2624 | *next_ptr = next; | |
2625 | if (prev_ptr) | |
2626 | *prev_ptr = prev; | |
2eec3b4e RS |
2627 | return idx; |
2628 | } | |
74514898 RS |
2629 | \f |
2630 | /* Find all the overlays in the current buffer that overlap the range BEG-END | |
2a3eeee7 RS |
2631 | or are empty at BEG. |
2632 | ||
177c0ea7 | 2633 | Return the number found, and store them in a vector in *VEC_PTR. |
74514898 RS |
2634 | Store in *LEN_PTR the size allocated for the vector. |
2635 | Store in *NEXT_PTR the next position after POS where an overlay starts, | |
2636 | or ZV if there are no more overlays. | |
2637 | Store in *PREV_PTR the previous position before POS where an overlay ends, | |
2638 | or BEGV if there are no previous overlays. | |
2639 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
2640 | ||
2641 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
2642 | when this function is called. | |
2643 | ||
2644 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2645 | If EXTEND is zero, we never extend the vector, | |
2646 | and we store only as many overlays as will fit. | |
2647 | But we still return the total number of overlays. */ | |
2648 | ||
a9b9a780 | 2649 | static int |
74514898 RS |
2650 | overlays_in (beg, end, extend, vec_ptr, len_ptr, next_ptr, prev_ptr) |
2651 | int beg, end; | |
2652 | int extend; | |
2653 | Lisp_Object **vec_ptr; | |
2654 | int *len_ptr; | |
2655 | int *next_ptr; | |
2656 | int *prev_ptr; | |
2657 | { | |
2410d73a SM |
2658 | Lisp_Object overlay, ostart, oend; |
2659 | struct Lisp_Overlay *tail; | |
74514898 RS |
2660 | int idx = 0; |
2661 | int len = *len_ptr; | |
2662 | Lisp_Object *vec = *vec_ptr; | |
2663 | int next = ZV; | |
2664 | int prev = BEGV; | |
2665 | int inhibit_storing = 0; | |
2666 | ||
2410d73a | 2667 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
74514898 RS |
2668 | { |
2669 | int startpos, endpos; | |
2670 | ||
2410d73a | 2671 | XSETMISC (overlay, tail); |
74514898 RS |
2672 | |
2673 | ostart = OVERLAY_START (overlay); | |
2674 | oend = OVERLAY_END (overlay); | |
2675 | endpos = OVERLAY_POSITION (oend); | |
2676 | if (endpos < beg) | |
2677 | { | |
2678 | if (prev < endpos) | |
2679 | prev = endpos; | |
2680 | break; | |
2681 | } | |
2682 | startpos = OVERLAY_POSITION (ostart); | |
2683 | /* Count an interval if it either overlaps the range | |
2a3eeee7 | 2684 | or is empty at the start of the range. */ |
74514898 | 2685 | if ((beg < endpos && startpos < end) |
2a3eeee7 | 2686 | || (startpos == endpos && beg == endpos)) |
74514898 RS |
2687 | { |
2688 | if (idx == len) | |
2689 | { | |
2690 | /* The supplied vector is full. | |
2691 | Either make it bigger, or don't store any more in it. */ | |
2692 | if (extend) | |
2693 | { | |
4b0e44fc RS |
2694 | /* Make it work with an initial len == 0. */ |
2695 | len *= 2; | |
2696 | if (len == 0) | |
2697 | len = 4; | |
2698 | *len_ptr = len; | |
74514898 RS |
2699 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2700 | *vec_ptr = vec; | |
2701 | } | |
2702 | else | |
2703 | inhibit_storing = 1; | |
2704 | } | |
2705 | ||
2706 | if (!inhibit_storing) | |
2707 | vec[idx] = overlay; | |
2708 | /* Keep counting overlays even if we can't return them all. */ | |
2709 | idx++; | |
2710 | } | |
2711 | else if (startpos < next) | |
2712 | next = startpos; | |
2713 | } | |
2714 | ||
2410d73a | 2715 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
74514898 RS |
2716 | { |
2717 | int startpos, endpos; | |
2718 | ||
2410d73a | 2719 | XSETMISC (overlay, tail); |
74514898 RS |
2720 | |
2721 | ostart = OVERLAY_START (overlay); | |
2722 | oend = OVERLAY_END (overlay); | |
2723 | startpos = OVERLAY_POSITION (ostart); | |
2724 | if (end < startpos) | |
2725 | { | |
2726 | if (startpos < next) | |
2727 | next = startpos; | |
2728 | break; | |
2729 | } | |
2730 | endpos = OVERLAY_POSITION (oend); | |
2a3eeee7 RS |
2731 | /* Count an interval if it either overlaps the range |
2732 | or is empty at the start of the range. */ | |
74514898 | 2733 | if ((beg < endpos && startpos < end) |
2a3eeee7 | 2734 | || (startpos == endpos && beg == endpos)) |
74514898 RS |
2735 | { |
2736 | if (idx == len) | |
2737 | { | |
2738 | if (extend) | |
2739 | { | |
4b0e44fc RS |
2740 | /* Make it work with an initial len == 0. */ |
2741 | len *= 2; | |
2742 | if (len == 0) | |
2743 | len = 4; | |
2744 | *len_ptr = len; | |
74514898 RS |
2745 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2746 | *vec_ptr = vec; | |
2747 | } | |
2748 | else | |
2749 | inhibit_storing = 1; | |
2750 | } | |
2751 | ||
2752 | if (!inhibit_storing) | |
2753 | vec[idx] = overlay; | |
2754 | idx++; | |
2755 | } | |
2756 | else if (endpos < beg && endpos > prev) | |
2757 | prev = endpos; | |
2758 | } | |
fc04fa47 | 2759 | |
74514898 RS |
2760 | if (next_ptr) |
2761 | *next_ptr = next; | |
2762 | if (prev_ptr) | |
2763 | *prev_ptr = prev; | |
2764 | return idx; | |
2765 | } | |
09a22085 GM |
2766 | |
2767 | ||
2768 | /* Return non-zero if there exists an overlay with a non-nil | |
2769 | `mouse-face' property overlapping OVERLAY. */ | |
2770 | ||
2771 | int | |
2772 | mouse_face_overlay_overlaps (overlay) | |
2773 | Lisp_Object overlay; | |
2774 | { | |
2775 | int start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2776 | int end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
bfd8410f | 2777 | int n, i, size; |
09a22085 | 2778 | Lisp_Object *v, tem; |
177c0ea7 | 2779 | |
bfd8410f GM |
2780 | size = 10; |
2781 | v = (Lisp_Object *) alloca (size * sizeof *v); | |
2782 | n = overlays_in (start, end, 0, &v, &size, NULL, NULL); | |
2783 | if (n > size) | |
09a22085 | 2784 | { |
09a22085 GM |
2785 | v = (Lisp_Object *) alloca (n * sizeof *v); |
2786 | overlays_in (start, end, 0, &v, &n, NULL, NULL); | |
2787 | } | |
2788 | ||
2789 | for (i = 0; i < n; ++i) | |
2790 | if (!EQ (v[i], overlay) | |
2791 | && (tem = Foverlay_get (overlay, Qmouse_face), | |
2792 | !NILP (tem))) | |
2793 | break; | |
2794 | ||
2795 | return i < n; | |
2796 | } | |
2797 | ||
2798 | ||
74514898 | 2799 | \f |
fc04fa47 KH |
2800 | /* Fast function to just test if we're at an overlay boundary. */ |
2801 | int | |
2802 | overlay_touches_p (pos) | |
2803 | int pos; | |
2804 | { | |
2410d73a SM |
2805 | Lisp_Object overlay; |
2806 | struct Lisp_Overlay *tail; | |
fc04fa47 | 2807 | |
2410d73a | 2808 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
fc04fa47 KH |
2809 | { |
2810 | int endpos; | |
2811 | ||
2410d73a | 2812 | XSETMISC (overlay ,tail); |
fc04fa47 KH |
2813 | if (!GC_OVERLAYP (overlay)) |
2814 | abort (); | |
2815 | ||
2816 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2817 | if (endpos < pos) | |
2818 | break; | |
2819 | if (endpos == pos || OVERLAY_POSITION (OVERLAY_START (overlay)) == pos) | |
2820 | return 1; | |
2821 | } | |
2822 | ||
2410d73a | 2823 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
fc04fa47 KH |
2824 | { |
2825 | int startpos; | |
2826 | ||
2410d73a | 2827 | XSETMISC (overlay, tail); |
fc04fa47 KH |
2828 | if (!GC_OVERLAYP (overlay)) |
2829 | abort (); | |
2830 | ||
2831 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2832 | if (pos < startpos) | |
2833 | break; | |
2834 | if (startpos == pos || OVERLAY_POSITION (OVERLAY_END (overlay)) == pos) | |
2835 | return 1; | |
2836 | } | |
2837 | return 0; | |
2838 | } | |
2eec3b4e | 2839 | \f |
5985d248 KH |
2840 | struct sortvec |
2841 | { | |
2842 | Lisp_Object overlay; | |
2843 | int beg, end; | |
2844 | int priority; | |
2845 | }; | |
2846 | ||
2847 | static int | |
dfcf069d AS |
2848 | compare_overlays (v1, v2) |
2849 | const void *v1, *v2; | |
5985d248 | 2850 | { |
dfcf069d AS |
2851 | const struct sortvec *s1 = (const struct sortvec *) v1; |
2852 | const struct sortvec *s2 = (const struct sortvec *) v2; | |
5985d248 KH |
2853 | if (s1->priority != s2->priority) |
2854 | return s1->priority - s2->priority; | |
2855 | if (s1->beg != s2->beg) | |
2856 | return s1->beg - s2->beg; | |
2857 | if (s1->end != s2->end) | |
2858 | return s2->end - s1->end; | |
2859 | return 0; | |
2860 | } | |
2861 | ||
2862 | /* Sort an array of overlays by priority. The array is modified in place. | |
2863 | The return value is the new size; this may be smaller than the original | |
2864 | size if some of the overlays were invalid or were window-specific. */ | |
2865 | int | |
2866 | sort_overlays (overlay_vec, noverlays, w) | |
2867 | Lisp_Object *overlay_vec; | |
2868 | int noverlays; | |
2869 | struct window *w; | |
2870 | { | |
2871 | int i, j; | |
2872 | struct sortvec *sortvec; | |
2873 | sortvec = (struct sortvec *) alloca (noverlays * sizeof (struct sortvec)); | |
2874 | ||
2875 | /* Put the valid and relevant overlays into sortvec. */ | |
2876 | ||
2877 | for (i = 0, j = 0; i < noverlays; i++) | |
2878 | { | |
0fa767e7 | 2879 | Lisp_Object tem; |
c99fc30f | 2880 | Lisp_Object overlay; |
5985d248 | 2881 | |
c99fc30f | 2882 | overlay = overlay_vec[i]; |
5985d248 KH |
2883 | if (OVERLAY_VALID (overlay) |
2884 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 | |
2885 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
2886 | { | |
0fa767e7 KH |
2887 | /* If we're interested in a specific window, then ignore |
2888 | overlays that are limited to some other window. */ | |
2889 | if (w) | |
5985d248 | 2890 | { |
0fa767e7 KH |
2891 | Lisp_Object window; |
2892 | ||
2893 | window = Foverlay_get (overlay, Qwindow); | |
a7a60ce9 | 2894 | if (WINDOWP (window) && XWINDOW (window) != w) |
0fa767e7 | 2895 | continue; |
5985d248 | 2896 | } |
0fa767e7 KH |
2897 | |
2898 | /* This overlay is good and counts: put it into sortvec. */ | |
2899 | sortvec[j].overlay = overlay; | |
2900 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2901 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2902 | tem = Foverlay_get (overlay, Qpriority); | |
2903 | if (INTEGERP (tem)) | |
2904 | sortvec[j].priority = XINT (tem); | |
2905 | else | |
2906 | sortvec[j].priority = 0; | |
2907 | j++; | |
5985d248 KH |
2908 | } |
2909 | } | |
2910 | noverlays = j; | |
2911 | ||
2912 | /* Sort the overlays into the proper order: increasing priority. */ | |
2913 | ||
2914 | if (noverlays > 1) | |
2915 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
2916 | ||
2917 | for (i = 0; i < noverlays; i++) | |
2918 | overlay_vec[i] = sortvec[i].overlay; | |
2919 | return (noverlays); | |
2920 | } | |
2921 | \f | |
bbbe9545 KH |
2922 | struct sortstr |
2923 | { | |
cb26008f | 2924 | Lisp_Object string, string2; |
bbbe9545 KH |
2925 | int size; |
2926 | int priority; | |
2927 | }; | |
2928 | ||
e8185fa8 KH |
2929 | struct sortstrlist |
2930 | { | |
2931 | struct sortstr *buf; /* An array that expands as needed; never freed. */ | |
2932 | int size; /* Allocated length of that array. */ | |
2933 | int used; /* How much of the array is currently in use. */ | |
2934 | int bytes; /* Total length of the strings in buf. */ | |
2935 | }; | |
2936 | ||
2937 | /* Buffers for storing information about the overlays touching a given | |
2938 | position. These could be automatic variables in overlay_strings, but | |
2939 | it's more efficient to hold onto the memory instead of repeatedly | |
2940 | allocating and freeing it. */ | |
2941 | static struct sortstrlist overlay_heads, overlay_tails; | |
9492daf2 | 2942 | static unsigned char *overlay_str_buf; |
e8185fa8 KH |
2943 | |
2944 | /* Allocated length of overlay_str_buf. */ | |
2945 | static int overlay_str_len; | |
2946 | ||
bbbe9545 KH |
2947 | /* A comparison function suitable for passing to qsort. */ |
2948 | static int | |
2949 | cmp_for_strings (as1, as2) | |
2950 | char *as1, *as2; | |
2951 | { | |
2952 | struct sortstr *s1 = (struct sortstr *)as1; | |
2953 | struct sortstr *s2 = (struct sortstr *)as2; | |
2954 | if (s1->size != s2->size) | |
2955 | return s2->size - s1->size; | |
2956 | if (s1->priority != s2->priority) | |
2957 | return s1->priority - s2->priority; | |
2958 | return 0; | |
2959 | } | |
2960 | ||
e8185fa8 | 2961 | static void |
cb26008f | 2962 | record_overlay_string (ssl, str, str2, pri, size) |
e8185fa8 | 2963 | struct sortstrlist *ssl; |
cb26008f | 2964 | Lisp_Object str, str2, pri; |
e8185fa8 KH |
2965 | int size; |
2966 | { | |
43d27a72 RS |
2967 | int nbytes; |
2968 | ||
e8185fa8 KH |
2969 | if (ssl->used == ssl->size) |
2970 | { | |
2971 | if (ssl->buf) | |
2972 | ssl->size *= 2; | |
2973 | else | |
2974 | ssl->size = 5; | |
2975 | ssl->buf = ((struct sortstr *) | |
2976 | xrealloc (ssl->buf, ssl->size * sizeof (struct sortstr))); | |
2977 | } | |
2978 | ssl->buf[ssl->used].string = str; | |
cb26008f | 2979 | ssl->buf[ssl->used].string2 = str2; |
e8185fa8 KH |
2980 | ssl->buf[ssl->used].size = size; |
2981 | ssl->buf[ssl->used].priority = (INTEGERP (pri) ? XINT (pri) : 0); | |
2982 | ssl->used++; | |
43d27a72 RS |
2983 | |
2984 | if (NILP (current_buffer->enable_multibyte_characters)) | |
d5db4077 | 2985 | nbytes = SCHARS (str); |
43d27a72 | 2986 | else if (! STRING_MULTIBYTE (str)) |
d5db4077 KR |
2987 | nbytes = count_size_as_multibyte (SDATA (str), |
2988 | SBYTES (str)); | |
43d27a72 | 2989 | else |
d5db4077 | 2990 | nbytes = SBYTES (str); |
43d27a72 RS |
2991 | |
2992 | ssl->bytes += nbytes; | |
2993 | ||
cb26008f | 2994 | if (STRINGP (str2)) |
43d27a72 RS |
2995 | { |
2996 | if (NILP (current_buffer->enable_multibyte_characters)) | |
d5db4077 | 2997 | nbytes = SCHARS (str2); |
43d27a72 | 2998 | else if (! STRING_MULTIBYTE (str2)) |
d5db4077 KR |
2999 | nbytes = count_size_as_multibyte (SDATA (str2), |
3000 | SBYTES (str2)); | |
43d27a72 | 3001 | else |
d5db4077 | 3002 | nbytes = SBYTES (str2); |
43d27a72 RS |
3003 | |
3004 | ssl->bytes += nbytes; | |
3005 | } | |
e8185fa8 | 3006 | } |
bbbe9545 KH |
3007 | |
3008 | /* Return the concatenation of the strings associated with overlays that | |
3009 | begin or end at POS, ignoring overlays that are specific to a window | |
3010 | other than W. The strings are concatenated in the appropriate order: | |
3011 | shorter overlays nest inside longer ones, and higher priority inside | |
cb26008f KH |
3012 | lower. Normally all of the after-strings come first, but zero-sized |
3013 | overlays have their after-strings ride along with the before-strings | |
3014 | because it would look strange to print them inside-out. | |
3015 | ||
3016 | Returns the string length, and stores the contents indirectly through | |
3017 | PSTR, if that variable is non-null. The string may be overwritten by | |
3018 | subsequent calls. */ | |
6b5d3b89 | 3019 | |
bbbe9545 KH |
3020 | int |
3021 | overlay_strings (pos, w, pstr) | |
c2d5b10f | 3022 | EMACS_INT pos; |
bbbe9545 | 3023 | struct window *w; |
6b5d3b89 | 3024 | unsigned char **pstr; |
bbbe9545 | 3025 | { |
2410d73a SM |
3026 | Lisp_Object overlay, window, str; |
3027 | struct Lisp_Overlay *ov; | |
bbbe9545 | 3028 | int startpos, endpos; |
43d27a72 | 3029 | int multibyte = ! NILP (current_buffer->enable_multibyte_characters); |
bbbe9545 | 3030 | |
e8185fa8 KH |
3031 | overlay_heads.used = overlay_heads.bytes = 0; |
3032 | overlay_tails.used = overlay_tails.bytes = 0; | |
2410d73a | 3033 | for (ov = current_buffer->overlays_before; ov; ov = ov->next) |
bbbe9545 | 3034 | { |
2410d73a | 3035 | XSETMISC (overlay, ov); |
c2d5b10f | 3036 | eassert (OVERLAYP (overlay)); |
bbbe9545 KH |
3037 | |
3038 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3039 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3040 | if (endpos < pos) | |
3041 | break; | |
3042 | if (endpos != pos && startpos != pos) | |
3043 | continue; | |
3044 | window = Foverlay_get (overlay, Qwindow); | |
3045 | if (WINDOWP (window) && XWINDOW (window) != w) | |
3046 | continue; | |
e8185fa8 KH |
3047 | if (startpos == pos |
3048 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3049 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3050 | (startpos == endpos |
3051 | ? Foverlay_get (overlay, Qafter_string) | |
3052 | : Qnil), | |
3053 | Foverlay_get (overlay, Qpriority), | |
3054 | endpos - startpos); | |
3055 | else if (endpos == pos | |
3056 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3057 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3058 | Foverlay_get (overlay, Qpriority), |
3059 | endpos - startpos); | |
bbbe9545 | 3060 | } |
2410d73a | 3061 | for (ov = current_buffer->overlays_after; ov; ov = ov->next) |
bbbe9545 | 3062 | { |
2410d73a SM |
3063 | XSETMISC (overlay, ov); |
3064 | eassert (OVERLAYP (overlay)); | |
bbbe9545 KH |
3065 | |
3066 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3067 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3068 | if (startpos > pos) | |
3069 | break; | |
e8185fa8 KH |
3070 | if (endpos != pos && startpos != pos) |
3071 | continue; | |
3072 | window = Foverlay_get (overlay, Qwindow); | |
3073 | if (WINDOWP (window) && XWINDOW (window) != w) | |
3074 | continue; | |
e8185fa8 KH |
3075 | if (startpos == pos |
3076 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3077 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3078 | (startpos == endpos |
3079 | ? Foverlay_get (overlay, Qafter_string) | |
3080 | : Qnil), | |
3081 | Foverlay_get (overlay, Qpriority), | |
3082 | endpos - startpos); | |
3083 | else if (endpos == pos | |
3084 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3085 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3086 | Foverlay_get (overlay, Qpriority), |
3087 | endpos - startpos); | |
bbbe9545 | 3088 | } |
e8185fa8 KH |
3089 | if (overlay_tails.used > 1) |
3090 | qsort (overlay_tails.buf, overlay_tails.used, sizeof (struct sortstr), | |
3091 | cmp_for_strings); | |
3092 | if (overlay_heads.used > 1) | |
3093 | qsort (overlay_heads.buf, overlay_heads.used, sizeof (struct sortstr), | |
3094 | cmp_for_strings); | |
3095 | if (overlay_heads.bytes || overlay_tails.bytes) | |
bbbe9545 | 3096 | { |
e8185fa8 | 3097 | Lisp_Object tem; |
bbbe9545 | 3098 | int i; |
9f4d7cde | 3099 | unsigned char *p; |
e8185fa8 | 3100 | int total = overlay_heads.bytes + overlay_tails.bytes; |
bbbe9545 KH |
3101 | |
3102 | if (total > overlay_str_len) | |
9f4d7cde RS |
3103 | { |
3104 | overlay_str_len = total; | |
3105 | overlay_str_buf = (unsigned char *)xrealloc (overlay_str_buf, | |
3106 | total); | |
3107 | } | |
bbbe9545 | 3108 | p = overlay_str_buf; |
e8185fa8 | 3109 | for (i = overlay_tails.used; --i >= 0;) |
bbbe9545 | 3110 | { |
43d27a72 | 3111 | int nbytes; |
e8185fa8 | 3112 | tem = overlay_tails.buf[i].string; |
d5db4077 KR |
3113 | nbytes = copy_text (SDATA (tem), p, |
3114 | SBYTES (tem), | |
43d27a72 RS |
3115 | STRING_MULTIBYTE (tem), multibyte); |
3116 | p += nbytes; | |
bbbe9545 | 3117 | } |
e8185fa8 | 3118 | for (i = 0; i < overlay_heads.used; ++i) |
bbbe9545 | 3119 | { |
43d27a72 | 3120 | int nbytes; |
e8185fa8 | 3121 | tem = overlay_heads.buf[i].string; |
d5db4077 KR |
3122 | nbytes = copy_text (SDATA (tem), p, |
3123 | SBYTES (tem), | |
43d27a72 RS |
3124 | STRING_MULTIBYTE (tem), multibyte); |
3125 | p += nbytes; | |
cb26008f KH |
3126 | tem = overlay_heads.buf[i].string2; |
3127 | if (STRINGP (tem)) | |
3128 | { | |
d5db4077 KR |
3129 | nbytes = copy_text (SDATA (tem), p, |
3130 | SBYTES (tem), | |
43d27a72 RS |
3131 | STRING_MULTIBYTE (tem), multibyte); |
3132 | p += nbytes; | |
cb26008f | 3133 | } |
bbbe9545 | 3134 | } |
cb26008f KH |
3135 | if (p != overlay_str_buf + total) |
3136 | abort (); | |
bbbe9545 KH |
3137 | if (pstr) |
3138 | *pstr = overlay_str_buf; | |
e8185fa8 | 3139 | return total; |
bbbe9545 | 3140 | } |
e8185fa8 | 3141 | return 0; |
bbbe9545 KH |
3142 | } |
3143 | \f | |
5c4f68f1 | 3144 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 3145 | |
2eec3b4e | 3146 | void |
5c4f68f1 JB |
3147 | recenter_overlay_lists (buf, pos) |
3148 | struct buffer *buf; | |
c2d5b10f | 3149 | EMACS_INT pos; |
2eec3b4e | 3150 | { |
2410d73a SM |
3151 | Lisp_Object overlay, beg, end; |
3152 | struct Lisp_Overlay *prev, *tail, *next; | |
2eec3b4e RS |
3153 | |
3154 | /* See if anything in overlays_before should move to overlays_after. */ | |
3155 | ||
3156 | /* We don't strictly need prev in this loop; it should always be nil. | |
3157 | But we use it for symmetry and in case that should cease to be true | |
3158 | with some future change. */ | |
2410d73a SM |
3159 | prev = NULL; |
3160 | for (tail = buf->overlays_before; tail; prev = tail, tail = next) | |
1ab256cb | 3161 | { |
2410d73a SM |
3162 | next = tail->next; |
3163 | XSETMISC (overlay, tail); | |
2eec3b4e RS |
3164 | |
3165 | /* If the overlay is not valid, get rid of it. */ | |
3166 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3167 | #if 1 |
3168 | abort (); | |
3169 | #else | |
2eec3b4e RS |
3170 | { |
3171 | /* Splice the cons cell TAIL out of overlays_before. */ | |
3172 | if (!NILP (prev)) | |
7539e11f | 3173 | XCDR (prev) = next; |
2eec3b4e | 3174 | else |
5c4f68f1 | 3175 | buf->overlays_before = next; |
2eec3b4e RS |
3176 | tail = prev; |
3177 | continue; | |
3178 | } | |
52f8ec73 | 3179 | #endif |
1ab256cb | 3180 | |
2eec3b4e RS |
3181 | beg = OVERLAY_START (overlay); |
3182 | end = OVERLAY_END (overlay); | |
1ab256cb | 3183 | |
2eec3b4e | 3184 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 3185 | { |
2eec3b4e RS |
3186 | /* OVERLAY needs to be moved. */ |
3187 | int where = OVERLAY_POSITION (beg); | |
2410d73a | 3188 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3189 | |
3190 | /* Splice the cons cell TAIL out of overlays_before. */ | |
2410d73a SM |
3191 | if (prev) |
3192 | prev->next = next; | |
2eec3b4e | 3193 | else |
5c4f68f1 | 3194 | buf->overlays_before = next; |
2eec3b4e RS |
3195 | |
3196 | /* Search thru overlays_after for where to put it. */ | |
2410d73a SM |
3197 | other_prev = NULL; |
3198 | for (other = buf->overlays_after; other; | |
3199 | other_prev = other, other = other->next) | |
1ab256cb | 3200 | { |
6af718a4 | 3201 | Lisp_Object otherbeg, otheroverlay; |
2eec3b4e | 3202 | |
2410d73a SM |
3203 | XSETMISC (otheroverlay, other); |
3204 | eassert (OVERLAY_VALID (otheroverlay)); | |
2eec3b4e RS |
3205 | |
3206 | otherbeg = OVERLAY_START (otheroverlay); | |
3207 | if (OVERLAY_POSITION (otherbeg) >= where) | |
3208 | break; | |
1ab256cb | 3209 | } |
2eec3b4e RS |
3210 | |
3211 | /* Add TAIL to overlays_after before OTHER. */ | |
2410d73a SM |
3212 | tail->next = other; |
3213 | if (other_prev) | |
3214 | other_prev->next = tail; | |
1ab256cb | 3215 | else |
5c4f68f1 | 3216 | buf->overlays_after = tail; |
2eec3b4e | 3217 | tail = prev; |
1ab256cb | 3218 | } |
2eec3b4e RS |
3219 | else |
3220 | /* We've reached the things that should stay in overlays_before. | |
3221 | All the rest of overlays_before must end even earlier, | |
3222 | so stop now. */ | |
3223 | break; | |
3224 | } | |
3225 | ||
3226 | /* See if anything in overlays_after should be in overlays_before. */ | |
2410d73a SM |
3227 | prev = NULL; |
3228 | for (tail = buf->overlays_after; tail; prev = tail, tail = next) | |
2eec3b4e | 3229 | { |
2410d73a SM |
3230 | next = tail->next; |
3231 | XSETMISC (overlay, tail); | |
2eec3b4e RS |
3232 | |
3233 | /* If the overlay is not valid, get rid of it. */ | |
3234 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3235 | #if 1 |
3236 | abort (); | |
3237 | #else | |
2eec3b4e RS |
3238 | { |
3239 | /* Splice the cons cell TAIL out of overlays_after. */ | |
3240 | if (!NILP (prev)) | |
7539e11f | 3241 | XCDR (prev) = next; |
2eec3b4e | 3242 | else |
5c4f68f1 | 3243 | buf->overlays_after = next; |
2eec3b4e RS |
3244 | tail = prev; |
3245 | continue; | |
3246 | } | |
52f8ec73 | 3247 | #endif |
2eec3b4e RS |
3248 | |
3249 | beg = OVERLAY_START (overlay); | |
3250 | end = OVERLAY_END (overlay); | |
3251 | ||
3252 | /* Stop looking, when we know that nothing further | |
3253 | can possibly end before POS. */ | |
3254 | if (OVERLAY_POSITION (beg) > pos) | |
3255 | break; | |
3256 | ||
3257 | if (OVERLAY_POSITION (end) <= pos) | |
3258 | { | |
3259 | /* OVERLAY needs to be moved. */ | |
3260 | int where = OVERLAY_POSITION (end); | |
2410d73a | 3261 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3262 | |
3263 | /* Splice the cons cell TAIL out of overlays_after. */ | |
2410d73a SM |
3264 | if (prev) |
3265 | prev->next = next; | |
2eec3b4e | 3266 | else |
5c4f68f1 | 3267 | buf->overlays_after = next; |
2eec3b4e RS |
3268 | |
3269 | /* Search thru overlays_before for where to put it. */ | |
2410d73a SM |
3270 | other_prev = NULL; |
3271 | for (other = buf->overlays_before; other; | |
3272 | other_prev = other, other = other->next) | |
2eec3b4e RS |
3273 | { |
3274 | Lisp_Object otherend, otheroverlay; | |
2eec3b4e | 3275 | |
2410d73a SM |
3276 | XSETMISC (otheroverlay, other); |
3277 | eassert (OVERLAY_VALID (otheroverlay)); | |
2eec3b4e RS |
3278 | |
3279 | otherend = OVERLAY_END (otheroverlay); | |
3280 | if (OVERLAY_POSITION (otherend) <= where) | |
3281 | break; | |
3282 | } | |
3283 | ||
3284 | /* Add TAIL to overlays_before before OTHER. */ | |
2410d73a SM |
3285 | tail->next = other; |
3286 | if (other_prev) | |
3287 | other_prev->next = tail; | |
2eec3b4e | 3288 | else |
5c4f68f1 | 3289 | buf->overlays_before = tail; |
2eec3b4e RS |
3290 | tail = prev; |
3291 | } | |
3292 | } | |
3293 | ||
c2d5b10f | 3294 | buf->overlay_center = pos; |
2eec3b4e | 3295 | } |
2b1bdf65 | 3296 | |
423cdb46 KH |
3297 | void |
3298 | adjust_overlays_for_insert (pos, length) | |
c2d5b10f SM |
3299 | EMACS_INT pos; |
3300 | EMACS_INT length; | |
423cdb46 KH |
3301 | { |
3302 | /* After an insertion, the lists are still sorted properly, | |
3303 | but we may need to update the value of the overlay center. */ | |
c2d5b10f SM |
3304 | if (current_buffer->overlay_center >= pos) |
3305 | current_buffer->overlay_center += length; | |
423cdb46 KH |
3306 | } |
3307 | ||
3308 | void | |
3309 | adjust_overlays_for_delete (pos, length) | |
c2d5b10f SM |
3310 | EMACS_INT pos; |
3311 | EMACS_INT length; | |
423cdb46 | 3312 | { |
c2d5b10f | 3313 | if (current_buffer->overlay_center < pos) |
423cdb46 KH |
3314 | /* The deletion was to our right. No change needed; the before- and |
3315 | after-lists are still consistent. */ | |
3316 | ; | |
c2d5b10f | 3317 | else if (current_buffer->overlay_center > pos + length) |
423cdb46 KH |
3318 | /* The deletion was to our left. We need to adjust the center value |
3319 | to account for the change in position, but the lists are consistent | |
3320 | given the new value. */ | |
c2d5b10f | 3321 | current_buffer->overlay_center -= length; |
423cdb46 KH |
3322 | else |
3323 | /* We're right in the middle. There might be things on the after-list | |
3324 | that now belong on the before-list. Recentering will move them, | |
3325 | and also update the center point. */ | |
3326 | recenter_overlay_lists (current_buffer, pos); | |
3327 | } | |
3328 | ||
2b1bdf65 KH |
3329 | /* Fix up overlays that were garbled as a result of permuting markers |
3330 | in the range START through END. Any overlay with at least one | |
3331 | endpoint in this range will need to be unlinked from the overlay | |
3332 | list and reinserted in its proper place. | |
3333 | Such an overlay might even have negative size at this point. | |
99a72bdf | 3334 | If so, we'll make the overlay empty. */ |
2b1bdf65 | 3335 | void |
abdb9b83 | 3336 | fix_start_end_in_overlays (start, end) |
2b1bdf65 KH |
3337 | register int start, end; |
3338 | { | |
6af718a4 | 3339 | Lisp_Object overlay; |
2410d73a | 3340 | struct Lisp_Overlay *before_list, *after_list; |
1138e742 KR |
3341 | /* These are either nil, indicating that before_list or after_list |
3342 | should be assigned, or the cons cell the cdr of which should be | |
3343 | assigned. */ | |
2410d73a | 3344 | struct Lisp_Overlay *beforep = NULL, *afterp = NULL; |
1138e742 KR |
3345 | /* 'Parent', likewise, indicates a cons cell or |
3346 | current_buffer->overlays_before or overlays_after, depending | |
3347 | which loop we're in. */ | |
2410d73a | 3348 | struct Lisp_Overlay *tail, *parent; |
2b1bdf65 KH |
3349 | int startpos, endpos; |
3350 | ||
3351 | /* This algorithm shifts links around instead of consing and GCing. | |
3352 | The loop invariant is that before_list (resp. after_list) is a | |
1138e742 KR |
3353 | well-formed list except that its last element, the CDR of beforep |
3354 | (resp. afterp) if beforep (afterp) isn't nil or before_list | |
3355 | (after_list) if it is, is still uninitialized. So it's not a bug | |
3356 | that before_list isn't initialized, although it may look | |
3357 | strange. */ | |
2410d73a | 3358 | for (parent = NULL, tail = current_buffer->overlays_before; tail;) |
2b1bdf65 | 3359 | { |
2410d73a | 3360 | XSETMISC (overlay, tail); |
99a72bdf | 3361 | |
2b1bdf65 | 3362 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
99a72bdf MY |
3363 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3364 | ||
3365 | /* If the overlay is backwards, make it empty. */ | |
3366 | if (endpos < startpos) | |
3367 | { | |
3368 | startpos = endpos; | |
3369 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
3370 | Qnil); | |
3371 | } | |
3372 | ||
2b1bdf65 KH |
3373 | if (endpos < start) |
3374 | break; | |
60ebfdf3 | 3375 | |
2b1bdf65 KH |
3376 | if (endpos < end |
3377 | || (startpos >= start && startpos < end)) | |
3378 | { | |
2b1bdf65 KH |
3379 | /* Add it to the end of the wrong list. Later on, |
3380 | recenter_overlay_lists will move it to the right place. */ | |
c2d5b10f | 3381 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3382 | { |
2410d73a | 3383 | if (!afterp) |
1138e742 KR |
3384 | after_list = tail; |
3385 | else | |
2410d73a | 3386 | afterp->next = tail; |
1138e742 | 3387 | afterp = tail; |
2b1bdf65 KH |
3388 | } |
3389 | else | |
3390 | { | |
2410d73a | 3391 | if (!beforep) |
1138e742 KR |
3392 | before_list = tail; |
3393 | else | |
2410d73a | 3394 | beforep->next = tail; |
1138e742 | 3395 | beforep = tail; |
2b1bdf65 | 3396 | } |
2410d73a SM |
3397 | if (!parent) |
3398 | current_buffer->overlays_before = tail->next; | |
1138e742 | 3399 | else |
2410d73a SM |
3400 | parent->next = tail->next; |
3401 | tail = tail->next; | |
2b1bdf65 KH |
3402 | } |
3403 | else | |
2410d73a | 3404 | parent = tail, tail = parent->next; |
2b1bdf65 | 3405 | } |
2410d73a | 3406 | for (parent = NULL, tail = current_buffer->overlays_after; tail;) |
2b1bdf65 | 3407 | { |
2410d73a | 3408 | XSETMISC (overlay, tail); |
99a72bdf | 3409 | |
2b1bdf65 | 3410 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
99a72bdf MY |
3411 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
3412 | ||
3413 | /* If the overlay is backwards, make it empty. */ | |
3414 | if (endpos < startpos) | |
3415 | { | |
3416 | startpos = endpos; | |
3417 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
60ebfdf3 | 3418 | Qnil); |
99a72bdf MY |
3419 | } |
3420 | ||
2b1bdf65 KH |
3421 | if (startpos >= end) |
3422 | break; | |
99a72bdf | 3423 | |
2b1bdf65 KH |
3424 | if (startpos >= start |
3425 | || (endpos >= start && endpos < end)) | |
3426 | { | |
c2d5b10f | 3427 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3428 | { |
2410d73a | 3429 | if (!afterp) |
1138e742 KR |
3430 | after_list = tail; |
3431 | else | |
2410d73a | 3432 | afterp->next = tail; |
1138e742 | 3433 | afterp = tail; |
2b1bdf65 KH |
3434 | } |
3435 | else | |
3436 | { | |
2410d73a | 3437 | if (!beforep) |
1138e742 KR |
3438 | before_list = tail; |
3439 | else | |
2410d73a | 3440 | beforep->next = tail; |
1138e742 | 3441 | beforep = tail; |
2b1bdf65 | 3442 | } |
2410d73a SM |
3443 | if (!parent) |
3444 | current_buffer->overlays_after = tail->next; | |
1138e742 | 3445 | else |
2410d73a SM |
3446 | parent->next = tail->next; |
3447 | tail = tail->next; | |
2b1bdf65 KH |
3448 | } |
3449 | else | |
2410d73a | 3450 | parent = tail, tail = parent->next; |
2b1bdf65 KH |
3451 | } |
3452 | ||
3453 | /* Splice the constructed (wrong) lists into the buffer's lists, | |
3454 | and let the recenter function make it sane again. */ | |
2410d73a | 3455 | if (beforep) |
1138e742 | 3456 | { |
2410d73a | 3457 | beforep->next = current_buffer->overlays_before; |
1138e742 KR |
3458 | current_buffer->overlays_before = before_list; |
3459 | } | |
c2d5b10f | 3460 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3461 | |
2410d73a | 3462 | if (afterp) |
1138e742 | 3463 | { |
2410d73a | 3464 | afterp->next = current_buffer->overlays_after; |
1138e742 KR |
3465 | current_buffer->overlays_after = after_list; |
3466 | } | |
c2d5b10f | 3467 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3468 | } |
3b06f880 KH |
3469 | |
3470 | /* We have two types of overlay: the one whose ending marker is | |
3471 | after-insertion-marker (this is the usual case) and the one whose | |
3472 | ending marker is before-insertion-marker. When `overlays_before' | |
3473 | contains overlays of the latter type and the former type in this | |
3474 | order and both overlays end at inserting position, inserting a text | |
3475 | increases only the ending marker of the latter type, which results | |
3476 | in incorrect ordering of `overlays_before'. | |
3477 | ||
3478 | This function fixes ordering of overlays in the slot | |
3479 | `overlays_before' of the buffer *BP. Before the insertion, `point' | |
3480 | was at PREV, and now is at POS. */ | |
3481 | ||
01136e9b | 3482 | void |
3b06f880 KH |
3483 | fix_overlays_before (bp, prev, pos) |
3484 | struct buffer *bp; | |
c2d5b10f | 3485 | EMACS_INT prev, pos; |
3b06f880 | 3486 | { |
2410d73a SM |
3487 | /* If parent is nil, replace overlays_before; otherwise, parent->next. */ |
3488 | struct Lisp_Overlay *tail = bp->overlays_before, *parent = NULL, *right_pair; | |
3489 | Lisp_Object tem; | |
c2d5b10f | 3490 | EMACS_INT end; |
3b06f880 KH |
3491 | |
3492 | /* After the insertion, the several overlays may be in incorrect | |
3493 | order. The possibility is that, in the list `overlays_before', | |
3494 | an overlay which ends at POS appears after an overlay which ends | |
3495 | at PREV. Since POS is greater than PREV, we must fix the | |
3496 | ordering of these overlays, by moving overlays ends at POS before | |
3497 | the overlays ends at PREV. */ | |
3498 | ||
3499 | /* At first, find a place where disordered overlays should be linked | |
3500 | in. It is where an overlay which end before POS exists. (i.e. an | |
3501 | overlay whose ending marker is after-insertion-marker if disorder | |
3502 | exists). */ | |
2410d73a SM |
3503 | while (tail |
3504 | && (XSETMISC (tem, tail), | |
3505 | (end = OVERLAY_POSITION (OVERLAY_END (tem))) >= pos)) | |
1138e742 KR |
3506 | { |
3507 | parent = tail; | |
2410d73a | 3508 | tail = tail->next; |
1138e742 | 3509 | } |
3b06f880 KH |
3510 | |
3511 | /* If we don't find such an overlay, | |
3512 | or the found one ends before PREV, | |
3513 | or the found one is the last one in the list, | |
3514 | we don't have to fix anything. */ | |
f93ad4cf | 3515 | if (!tail || end < prev || !tail->next) |
3b06f880 KH |
3516 | return; |
3517 | ||
1138e742 KR |
3518 | right_pair = parent; |
3519 | parent = tail; | |
2410d73a | 3520 | tail = tail->next; |
3b06f880 | 3521 | |
1138e742 | 3522 | /* Now, end position of overlays in the list TAIL should be before |
3b06f880 | 3523 | or equal to PREV. In the loop, an overlay which ends at POS is |
1138e742 KR |
3524 | moved ahead to the place indicated by the CDR of RIGHT_PAIR. If |
3525 | we found an overlay which ends before PREV, the remaining | |
3526 | overlays are in correct order. */ | |
2410d73a | 3527 | while (tail) |
3b06f880 | 3528 | { |
2410d73a SM |
3529 | XSETMISC (tem, tail); |
3530 | end = OVERLAY_POSITION (OVERLAY_END (tem)); | |
3b06f880 KH |
3531 | |
3532 | if (end == pos) | |
3533 | { /* This overlay is disordered. */ | |
2410d73a | 3534 | struct Lisp_Overlay *found = tail; |
3b06f880 KH |
3535 | |
3536 | /* Unlink the found overlay. */ | |
2410d73a SM |
3537 | tail = found->next; |
3538 | parent->next = tail; | |
1138e742 KR |
3539 | /* Move an overlay at RIGHT_PLACE to the next of the found one, |
3540 | and link it into the right place. */ | |
2410d73a | 3541 | if (!right_pair) |
1138e742 | 3542 | { |
2410d73a | 3543 | found->next = bp->overlays_before; |
1138e742 KR |
3544 | bp->overlays_before = found; |
3545 | } | |
3546 | else | |
3547 | { | |
2410d73a SM |
3548 | found->next = right_pair->next; |
3549 | right_pair->next = found; | |
1138e742 | 3550 | } |
3b06f880 KH |
3551 | } |
3552 | else if (end == prev) | |
1138e742 KR |
3553 | { |
3554 | parent = tail; | |
2410d73a | 3555 | tail = tail->next; |
1138e742 | 3556 | } |
3b06f880 KH |
3557 | else /* No more disordered overlay. */ |
3558 | break; | |
3559 | } | |
3560 | } | |
2eec3b4e | 3561 | \f |
52f8ec73 | 3562 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
7ee72033 MB |
3563 | doc: /* Return t if OBJECT is an overlay. */) |
3564 | (object) | |
52f8ec73 JB |
3565 | Lisp_Object object; |
3566 | { | |
3567 | return (OVERLAYP (object) ? Qt : Qnil); | |
3568 | } | |
3569 | ||
acac2700 | 3570 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 5, 0, |
7ee72033 | 3571 | doc: /* Create a new overlay with range BEG to END in BUFFER. |
018ba359 PJ |
3572 | If omitted, BUFFER defaults to the current buffer. |
3573 | BEG and END may be integers or markers. | |
a625ee20 RS |
3574 | The fourth arg FRONT-ADVANCE, if non-nil, makes the marker |
3575 | for the front of the overlay advance when text is inserted there | |
63af6055 | 3576 | \(which means the text *is not* included in the overlay). |
a625ee20 RS |
3577 | The fifth arg REAR-ADVANCE, if non-nil, makes the marker |
3578 | for the rear of the overlay advance when text is inserted there | |
63af6055 | 3579 | \(which means the text *is* included in the overlay). */) |
7ee72033 | 3580 | (beg, end, buffer, front_advance, rear_advance) |
5c4f68f1 | 3581 | Lisp_Object beg, end, buffer; |
acac2700 | 3582 | Lisp_Object front_advance, rear_advance; |
2eec3b4e RS |
3583 | { |
3584 | Lisp_Object overlay; | |
5c4f68f1 | 3585 | struct buffer *b; |
2eec3b4e | 3586 | |
5c4f68f1 | 3587 | if (NILP (buffer)) |
67180c6a | 3588 | XSETBUFFER (buffer, current_buffer); |
883047b9 | 3589 | else |
b7826503 | 3590 | CHECK_BUFFER (buffer); |
883047b9 JB |
3591 | if (MARKERP (beg) |
3592 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3593 | error ("Marker points into wrong buffer"); | |
3594 | if (MARKERP (end) | |
3595 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3596 | error ("Marker points into wrong buffer"); | |
2eec3b4e | 3597 | |
b7826503 PJ |
3598 | CHECK_NUMBER_COERCE_MARKER (beg); |
3599 | CHECK_NUMBER_COERCE_MARKER (end); | |
5c4f68f1 | 3600 | |
883047b9 | 3601 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 3602 | { |
c99fc30f KH |
3603 | Lisp_Object temp; |
3604 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 3605 | } |
883047b9 JB |
3606 | |
3607 | b = XBUFFER (buffer); | |
3608 | ||
3609 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
3610 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 | 3611 | |
acac2700 RS |
3612 | if (!NILP (front_advance)) |
3613 | XMARKER (beg)->insertion_type = 1; | |
3614 | if (!NILP (rear_advance)) | |
3615 | XMARKER (end)->insertion_type = 1; | |
597dd755 | 3616 | |
48e2e3ba | 3617 | overlay = allocate_misc (); |
89ca3e1b | 3618 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; |
48e2e3ba KH |
3619 | XOVERLAY (overlay)->start = beg; |
3620 | XOVERLAY (overlay)->end = end; | |
3621 | XOVERLAY (overlay)->plist = Qnil; | |
2410d73a | 3622 | XOVERLAY (overlay)->next = NULL; |
2eec3b4e | 3623 | |
177c0ea7 | 3624 | /* Put the new overlay on the wrong list. */ |
2eec3b4e | 3625 | end = OVERLAY_END (overlay); |
c2d5b10f | 3626 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a SM |
3627 | { |
3628 | if (b->overlays_after) | |
3629 | XOVERLAY (overlay)->next = b->overlays_after; | |
3630 | b->overlays_after = XOVERLAY (overlay); | |
3631 | } | |
2eec3b4e | 3632 | else |
2410d73a SM |
3633 | { |
3634 | if (b->overlays_before) | |
3635 | XOVERLAY (overlay)->next = b->overlays_before; | |
3636 | b->overlays_before = XOVERLAY (overlay); | |
3637 | } | |
2eec3b4e RS |
3638 | |
3639 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3640 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3641 | |
b61982dd JB |
3642 | /* We don't need to redisplay the region covered by the overlay, because |
3643 | the overlay has no properties at the moment. */ | |
3644 | ||
2eec3b4e RS |
3645 | return overlay; |
3646 | } | |
876aa27c RS |
3647 | \f |
3648 | /* Mark a section of BUF as needing redisplay because of overlays changes. */ | |
3649 | ||
3650 | static void | |
3651 | modify_overlay (buf, start, end) | |
3652 | struct buffer *buf; | |
c2d5b10f | 3653 | EMACS_INT start, end; |
876aa27c | 3654 | { |
876aa27c RS |
3655 | if (start > end) |
3656 | { | |
3657 | int temp = start; | |
26f545d7 GM |
3658 | start = end; |
3659 | end = temp; | |
876aa27c RS |
3660 | } |
3661 | ||
481b5054 | 3662 | BUF_COMPUTE_UNCHANGED (buf, start, end); |
177c0ea7 | 3663 | |
876aa27c RS |
3664 | /* If this is a buffer not in the selected window, |
3665 | we must do other windows. */ | |
3666 | if (buf != XBUFFER (XWINDOW (selected_window)->buffer)) | |
3667 | windows_or_buffers_changed = 1; | |
876aa27c RS |
3668 | /* If multiple windows show this buffer, we must do other windows. */ |
3669 | else if (buffer_shared > 1) | |
3670 | windows_or_buffers_changed = 1; | |
18700091 KS |
3671 | /* If we modify an overlay at the end of the buffer, we cannot |
3672 | be sure that window end is still valid. */ | |
3673 | else if (end >= ZV && start <= ZV) | |
3674 | windows_or_buffers_changed = 1; | |
876aa27c | 3675 | |
d8b9150f | 3676 | ++BUF_OVERLAY_MODIFF (buf); |
876aa27c | 3677 | } |
2eec3b4e | 3678 | |
018ba359 | 3679 | \f |
2e34157c RS |
3680 | Lisp_Object Fdelete_overlay (); |
3681 | ||
2410d73a SM |
3682 | static struct Lisp_Overlay * |
3683 | unchain_overlay (list, overlay) | |
3684 | struct Lisp_Overlay *list, *overlay; | |
3685 | { | |
3686 | struct Lisp_Overlay *tmp, *prev; | |
3687 | for (tmp = list, prev = NULL; tmp; prev = tmp, tmp = tmp->next) | |
3688 | if (tmp == overlay) | |
3689 | { | |
3690 | if (prev) | |
3691 | prev->next = tmp->next; | |
3692 | else | |
3693 | list = tmp->next; | |
3694 | overlay->next = NULL; | |
3695 | break; | |
3696 | } | |
3697 | return list; | |
3698 | } | |
3699 | ||
5c4f68f1 | 3700 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
7ee72033 | 3701 | doc: /* Set the endpoints of OVERLAY to BEG and END in BUFFER. |
018ba359 PJ |
3702 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now. |
3703 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current | |
7ee72033 MB |
3704 | buffer. */) |
3705 | (overlay, beg, end, buffer) | |
5c4f68f1 | 3706 | Lisp_Object overlay, beg, end, buffer; |
2eec3b4e | 3707 | { |
0a4469c9 RS |
3708 | struct buffer *b, *ob; |
3709 | Lisp_Object obuffer; | |
aed13378 | 3710 | int count = SPECPDL_INDEX (); |
5c4f68f1 | 3711 | |
b7826503 | 3712 | CHECK_OVERLAY (overlay); |
5c4f68f1 JB |
3713 | if (NILP (buffer)) |
3714 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a | 3715 | if (NILP (buffer)) |
67180c6a | 3716 | XSETBUFFER (buffer, current_buffer); |
b7826503 | 3717 | CHECK_BUFFER (buffer); |
883047b9 JB |
3718 | |
3719 | if (MARKERP (beg) | |
3720 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3721 | error ("Marker points into wrong buffer"); | |
3722 | if (MARKERP (end) | |
3723 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3724 | error ("Marker points into wrong buffer"); | |
3725 | ||
b7826503 PJ |
3726 | CHECK_NUMBER_COERCE_MARKER (beg); |
3727 | CHECK_NUMBER_COERCE_MARKER (end); | |
b61982dd | 3728 | |
9d7608b7 KH |
3729 | if (XINT (beg) == XINT (end) && ! NILP (Foverlay_get (overlay, Qevaporate))) |
3730 | return Fdelete_overlay (overlay); | |
0a4469c9 | 3731 | |
b61982dd JB |
3732 | if (XINT (beg) > XINT (end)) |
3733 | { | |
c99fc30f KH |
3734 | Lisp_Object temp; |
3735 | temp = beg; beg = end; end = temp; | |
b61982dd JB |
3736 | } |
3737 | ||
9d7608b7 KH |
3738 | specbind (Qinhibit_quit, Qt); |
3739 | ||
0a4469c9 | 3740 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
5c4f68f1 | 3741 | b = XBUFFER (buffer); |
8801a864 | 3742 | ob = BUFFERP (obuffer) ? XBUFFER (obuffer) : (struct buffer *) 0; |
2eec3b4e | 3743 | |
c82ed728 | 3744 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 3745 | if (!EQ (buffer, obuffer)) |
50760c4a RS |
3746 | { |
3747 | /* Redisplay where the overlay was. */ | |
3748 | if (!NILP (obuffer)) | |
3749 | { | |
2e34157c RS |
3750 | int o_beg; |
3751 | int o_end; | |
50760c4a | 3752 | |
80509f2f RS |
3753 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3754 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
50760c4a | 3755 | |
2e34157c | 3756 | modify_overlay (ob, o_beg, o_end); |
50760c4a RS |
3757 | } |
3758 | ||
3759 | /* Redisplay where the overlay is going to be. */ | |
876aa27c | 3760 | modify_overlay (b, XINT (beg), XINT (end)); |
50760c4a | 3761 | } |
c82ed728 JB |
3762 | else |
3763 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
3764 | { | |
2e34157c | 3765 | int o_beg, o_end; |
c82ed728 | 3766 | |
80509f2f RS |
3767 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3768 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
c82ed728 | 3769 | |
2e34157c RS |
3770 | if (o_beg == XINT (beg)) |
3771 | modify_overlay (b, o_end, XINT (end)); | |
3772 | else if (o_end == XINT (end)) | |
3773 | modify_overlay (b, o_beg, XINT (beg)); | |
c82ed728 JB |
3774 | else |
3775 | { | |
2e34157c RS |
3776 | if (XINT (beg) < o_beg) o_beg = XINT (beg); |
3777 | if (XINT (end) > o_end) o_end = XINT (end); | |
3778 | modify_overlay (b, o_beg, o_end); | |
c82ed728 JB |
3779 | } |
3780 | } | |
b61982dd | 3781 | |
0a4469c9 RS |
3782 | if (!NILP (obuffer)) |
3783 | { | |
2410d73a SM |
3784 | ob->overlays_before |
3785 | = unchain_overlay (ob->overlays_before, XOVERLAY (overlay)); | |
3786 | ob->overlays_after | |
3787 | = unchain_overlay (ob->overlays_after, XOVERLAY (overlay)); | |
3788 | eassert (XOVERLAY (overlay)->next == NULL); | |
0a4469c9 | 3789 | } |
5c4f68f1 JB |
3790 | |
3791 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
3792 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
2eec3b4e | 3793 | |
177c0ea7 | 3794 | /* Put the overlay on the wrong list. */ |
2eec3b4e | 3795 | end = OVERLAY_END (overlay); |
c2d5b10f | 3796 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a | 3797 | { |
2f297815 GM |
3798 | XOVERLAY (overlay)->next = b->overlays_after; |
3799 | b->overlays_after = XOVERLAY (overlay); | |
2410d73a | 3800 | } |
2eec3b4e | 3801 | else |
2410d73a | 3802 | { |
2f297815 GM |
3803 | XOVERLAY (overlay)->next = b->overlays_before; |
3804 | b->overlays_before = XOVERLAY (overlay); | |
2410d73a | 3805 | } |
2eec3b4e RS |
3806 | |
3807 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3808 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3809 | |
0a4469c9 | 3810 | return unbind_to (count, overlay); |
2eec3b4e RS |
3811 | } |
3812 | ||
3813 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
7ee72033 MB |
3814 | doc: /* Delete the overlay OVERLAY from its buffer. */) |
3815 | (overlay) | |
5c4f68f1 | 3816 | Lisp_Object overlay; |
2eec3b4e | 3817 | { |
0a4469c9 | 3818 | Lisp_Object buffer; |
5c4f68f1 | 3819 | struct buffer *b; |
aed13378 | 3820 | int count = SPECPDL_INDEX (); |
5c4f68f1 | 3821 | |
b7826503 | 3822 | CHECK_OVERLAY (overlay); |
52f8ec73 | 3823 | |
0a4469c9 RS |
3824 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
3825 | if (NILP (buffer)) | |
3826 | return Qnil; | |
3827 | ||
3828 | b = XBUFFER (buffer); | |
0a4469c9 | 3829 | specbind (Qinhibit_quit, Qt); |
177c0ea7 | 3830 | |
2410d73a SM |
3831 | b->overlays_before = unchain_overlay (b->overlays_before,XOVERLAY (overlay)); |
3832 | b->overlays_after = unchain_overlay (b->overlays_after, XOVERLAY (overlay)); | |
3833 | eassert (XOVERLAY (overlay)->next == NULL); | |
876aa27c | 3834 | modify_overlay (b, |
8231a9aa RS |
3835 | marker_position (OVERLAY_START (overlay)), |
3836 | marker_position (OVERLAY_END (overlay))); | |
3ece337a JB |
3837 | Fset_marker (OVERLAY_START (overlay), Qnil, Qnil); |
3838 | Fset_marker (OVERLAY_END (overlay), Qnil, Qnil); | |
3839 | ||
e58c389d | 3840 | /* When deleting an overlay with before or after strings, turn off |
26f545d7 GM |
3841 | display optimizations for the affected buffer, on the basis that |
3842 | these strings may contain newlines. This is easier to do than to | |
3843 | check for that situation during redisplay. */ | |
3844 | if (!windows_or_buffers_changed | |
3845 | && (!NILP (Foverlay_get (overlay, Qbefore_string)) | |
3846 | || !NILP (Foverlay_get (overlay, Qafter_string)))) | |
3847 | b->prevent_redisplay_optimizations_p = 1; | |
3848 | ||
0a4469c9 | 3849 | return unbind_to (count, Qnil); |
2eec3b4e RS |
3850 | } |
3851 | \f | |
8ebafa8d JB |
3852 | /* Overlay dissection functions. */ |
3853 | ||
3854 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, | |
7ee72033 MB |
3855 | doc: /* Return the position at which OVERLAY starts. */) |
3856 | (overlay) | |
8ebafa8d JB |
3857 | Lisp_Object overlay; |
3858 | { | |
b7826503 | 3859 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3860 | |
3861 | return (Fmarker_position (OVERLAY_START (overlay))); | |
3862 | } | |
3863 | ||
3864 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, | |
7ee72033 MB |
3865 | doc: /* Return the position at which OVERLAY ends. */) |
3866 | (overlay) | |
8ebafa8d JB |
3867 | Lisp_Object overlay; |
3868 | { | |
b7826503 | 3869 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3870 | |
3871 | return (Fmarker_position (OVERLAY_END (overlay))); | |
3872 | } | |
3873 | ||
3874 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
563f7128 LK |
3875 | doc: /* Return the buffer OVERLAY belongs to. |
3876 | Return nil if OVERLAY has been deleted. */) | |
7ee72033 | 3877 | (overlay) |
8ebafa8d JB |
3878 | Lisp_Object overlay; |
3879 | { | |
b7826503 | 3880 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3881 | |
3882 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
3883 | } | |
3884 | ||
3885 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
7ee72033 | 3886 | doc: /* Return a list of the properties on OVERLAY. |
018ba359 | 3887 | This is a copy of OVERLAY's plist; modifying its conses has no effect on |
7ee72033 MB |
3888 | OVERLAY. */) |
3889 | (overlay) | |
8ebafa8d JB |
3890 | Lisp_Object overlay; |
3891 | { | |
b7826503 | 3892 | CHECK_OVERLAY (overlay); |
8ebafa8d | 3893 | |
48e2e3ba | 3894 | return Fcopy_sequence (XOVERLAY (overlay)->plist); |
8ebafa8d JB |
3895 | } |
3896 | ||
3897 | \f | |
2eec3b4e | 3898 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
7ee72033 MB |
3899 | doc: /* Return a list of the overlays that contain position POS. */) |
3900 | (pos) | |
2eec3b4e RS |
3901 | Lisp_Object pos; |
3902 | { | |
3903 | int noverlays; | |
2eec3b4e RS |
3904 | Lisp_Object *overlay_vec; |
3905 | int len; | |
3906 | Lisp_Object result; | |
3907 | ||
b7826503 | 3908 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
3909 | |
3910 | len = 10; | |
a9800ae8 | 3911 | /* We can't use alloca here because overlays_at can call xrealloc. */ |
2eec3b4e RS |
3912 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); |
3913 | ||
3914 | /* Put all the overlays we want in a vector in overlay_vec. | |
3915 | Store the length in len. */ | |
2a77a7d7 | 3916 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
ac869cf7 | 3917 | (int *) 0, (int *) 0, 0); |
2eec3b4e RS |
3918 | |
3919 | /* Make a list of them all. */ | |
3920 | result = Flist (noverlays, overlay_vec); | |
3921 | ||
9ac0d9e0 | 3922 | xfree (overlay_vec); |
2eec3b4e RS |
3923 | return result; |
3924 | } | |
3925 | ||
74514898 | 3926 | DEFUN ("overlays-in", Foverlays_in, Soverlays_in, 2, 2, 0, |
7ee72033 | 3927 | doc: /* Return a list of the overlays that overlap the region BEG ... END. |
018ba359 PJ |
3928 | Overlap means that at least one character is contained within the overlay |
3929 | and also contained within the specified region. | |
3930 | Empty overlays are included in the result if they are located at BEG | |
7ee72033 MB |
3931 | or between BEG and END. */) |
3932 | (beg, end) | |
74514898 RS |
3933 | Lisp_Object beg, end; |
3934 | { | |
3935 | int noverlays; | |
3936 | Lisp_Object *overlay_vec; | |
3937 | int len; | |
3938 | Lisp_Object result; | |
3939 | ||
b7826503 PJ |
3940 | CHECK_NUMBER_COERCE_MARKER (beg); |
3941 | CHECK_NUMBER_COERCE_MARKER (end); | |
74514898 RS |
3942 | |
3943 | len = 10; | |
3944 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3945 | ||
3946 | /* Put all the overlays we want in a vector in overlay_vec. | |
3947 | Store the length in len. */ | |
3948 | noverlays = overlays_in (XINT (beg), XINT (end), 1, &overlay_vec, &len, | |
3949 | (int *) 0, (int *) 0); | |
3950 | ||
3951 | /* Make a list of them all. */ | |
3952 | result = Flist (noverlays, overlay_vec); | |
3953 | ||
3954 | xfree (overlay_vec); | |
3955 | return result; | |
3956 | } | |
3957 | ||
2eec3b4e | 3958 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, |
efc7e75f | 3959 | 1, 1, 0, |
7ee72033 | 3960 | doc: /* Return the next position after POS where an overlay starts or ends. |
624d2678 RS |
3961 | If there are no overlay boundaries from POS to (point-max), |
3962 | the value is (point-max). */) | |
7ee72033 | 3963 | (pos) |
2eec3b4e RS |
3964 | Lisp_Object pos; |
3965 | { | |
3966 | int noverlays; | |
3967 | int endpos; | |
3968 | Lisp_Object *overlay_vec; | |
3969 | int len; | |
2eec3b4e RS |
3970 | int i; |
3971 | ||
b7826503 | 3972 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
3973 | |
3974 | len = 10; | |
3975 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
3976 | ||
3977 | /* Put all the overlays we want in a vector in overlay_vec. | |
3978 | Store the length in len. | |
3979 | endpos gets the position where the next overlay starts. */ | |
2a77a7d7 | 3980 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
ac869cf7 | 3981 | &endpos, (int *) 0, 1); |
2eec3b4e RS |
3982 | |
3983 | /* If any of these overlays ends before endpos, | |
3984 | use its ending point instead. */ | |
3985 | for (i = 0; i < noverlays; i++) | |
3986 | { | |
3987 | Lisp_Object oend; | |
3988 | int oendpos; | |
3989 | ||
3990 | oend = OVERLAY_END (overlay_vec[i]); | |
3991 | oendpos = OVERLAY_POSITION (oend); | |
3992 | if (oendpos < endpos) | |
3993 | endpos = oendpos; | |
1ab256cb RM |
3994 | } |
3995 | ||
9ac0d9e0 | 3996 | xfree (overlay_vec); |
2eec3b4e RS |
3997 | return make_number (endpos); |
3998 | } | |
239c932b RS |
3999 | |
4000 | DEFUN ("previous-overlay-change", Fprevious_overlay_change, | |
4001 | Sprevious_overlay_change, 1, 1, 0, | |
7ee72033 | 4002 | doc: /* Return the previous position before POS where an overlay starts or ends. |
624d2678 RS |
4003 | If there are no overlay boundaries from (point-min) to POS, |
4004 | the value is (point-min). */) | |
7ee72033 | 4005 | (pos) |
239c932b RS |
4006 | Lisp_Object pos; |
4007 | { | |
4008 | int noverlays; | |
4009 | int prevpos; | |
4010 | Lisp_Object *overlay_vec; | |
4011 | int len; | |
239c932b | 4012 | |
b7826503 | 4013 | CHECK_NUMBER_COERCE_MARKER (pos); |
239c932b | 4014 | |
624bbdc4 RS |
4015 | /* At beginning of buffer, we know the answer; |
4016 | avoid bug subtracting 1 below. */ | |
4017 | if (XINT (pos) == BEGV) | |
4018 | return pos; | |
4019 | ||
017f0539 GM |
4020 | len = 10; |
4021 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
4022 | ||
239c932b RS |
4023 | /* Put all the overlays we want in a vector in overlay_vec. |
4024 | Store the length in len. | |
daa1c109 | 4025 | prevpos gets the position of the previous change. */ |
2a77a7d7 | 4026 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
ac869cf7 | 4027 | (int *) 0, &prevpos, 1); |
239c932b | 4028 | |
239c932b RS |
4029 | xfree (overlay_vec); |
4030 | return make_number (prevpos); | |
4031 | } | |
2eec3b4e RS |
4032 | \f |
4033 | /* These functions are for debugging overlays. */ | |
4034 | ||
4035 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
7ee72033 | 4036 | doc: /* Return a pair of lists giving all the overlays of the current buffer. |
018ba359 PJ |
4037 | The car has all the overlays before the overlay center; |
4038 | the cdr has all the overlays after the overlay center. | |
4039 | Recentering overlays moves overlays between these lists. | |
4040 | The lists you get are copies, so that changing them has no effect. | |
7ee72033 MB |
4041 | However, the overlays you get are the real objects that the buffer uses. */) |
4042 | () | |
2eec3b4e | 4043 | { |
2410d73a SM |
4044 | struct Lisp_Overlay *ol; |
4045 | Lisp_Object before = Qnil, after = Qnil, tmp; | |
4046 | for (ol = current_buffer->overlays_before; ol; ol = ol->next) | |
4047 | { | |
4048 | XSETMISC (tmp, ol); | |
4049 | before = Fcons (tmp, before); | |
4050 | } | |
4051 | for (ol = current_buffer->overlays_after; ol; ol = ol->next) | |
4052 | { | |
4053 | XSETMISC (tmp, ol); | |
4054 | after = Fcons (tmp, after); | |
4055 | } | |
4056 | return Fcons (Fnreverse (before), Fnreverse (after)); | |
2eec3b4e RS |
4057 | } |
4058 | ||
4059 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
c87426c5 RS |
4060 | doc: /* Recenter the overlays of the current buffer around position POS. |
4061 | That makes overlay lookup faster for positions near POS (but perhaps slower | |
4062 | for positions far away from POS). */) | |
7ee72033 | 4063 | (pos) |
2eec3b4e RS |
4064 | Lisp_Object pos; |
4065 | { | |
b7826503 | 4066 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e | 4067 | |
5c4f68f1 | 4068 | recenter_overlay_lists (current_buffer, XINT (pos)); |
2eec3b4e RS |
4069 | return Qnil; |
4070 | } | |
4071 | \f | |
4072 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, | |
7ee72033 MB |
4073 | doc: /* Get the property of overlay OVERLAY with property name PROP. */) |
4074 | (overlay, prop) | |
2eec3b4e RS |
4075 | Lisp_Object overlay, prop; |
4076 | { | |
b7826503 | 4077 | CHECK_OVERLAY (overlay); |
9a593927 | 4078 | return lookup_char_property (XOVERLAY (overlay)->plist, prop, 0); |
2eec3b4e RS |
4079 | } |
4080 | ||
4081 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
7ee72033 MB |
4082 | doc: /* Set one property of overlay OVERLAY: give property PROP value VALUE. */) |
4083 | (overlay, prop, value) | |
2eec3b4e RS |
4084 | Lisp_Object overlay, prop, value; |
4085 | { | |
48e2e3ba | 4086 | Lisp_Object tail, buffer; |
9d7608b7 | 4087 | int changed; |
2eec3b4e | 4088 | |
b7826503 | 4089 | CHECK_OVERLAY (overlay); |
b61982dd | 4090 | |
274a9425 RS |
4091 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
4092 | ||
48e2e3ba | 4093 | for (tail = XOVERLAY (overlay)->plist; |
7539e11f KR |
4094 | CONSP (tail) && CONSP (XCDR (tail)); |
4095 | tail = XCDR (XCDR (tail))) | |
4096 | if (EQ (XCAR (tail), prop)) | |
274a9425 | 4097 | { |
7539e11f | 4098 | changed = !EQ (XCAR (XCDR (tail)), value); |
f3fbd155 | 4099 | XSETCAR (XCDR (tail), value); |
9d7608b7 | 4100 | goto found; |
274a9425 | 4101 | } |
9d7608b7 KH |
4102 | /* It wasn't in the list, so add it to the front. */ |
4103 | changed = !NILP (value); | |
48e2e3ba KH |
4104 | XOVERLAY (overlay)->plist |
4105 | = Fcons (prop, Fcons (value, XOVERLAY (overlay)->plist)); | |
9d7608b7 KH |
4106 | found: |
4107 | if (! NILP (buffer)) | |
4108 | { | |
4109 | if (changed) | |
876aa27c | 4110 | modify_overlay (XBUFFER (buffer), |
26f545d7 GM |
4111 | marker_position (OVERLAY_START (overlay)), |
4112 | marker_position (OVERLAY_END (overlay))); | |
9d7608b7 KH |
4113 | if (EQ (prop, Qevaporate) && ! NILP (value) |
4114 | && (OVERLAY_POSITION (OVERLAY_START (overlay)) | |
4115 | == OVERLAY_POSITION (OVERLAY_END (overlay)))) | |
4116 | Fdelete_overlay (overlay); | |
4117 | } | |
7d63db98 | 4118 | |
2eec3b4e | 4119 | return value; |
1ab256cb RM |
4120 | } |
4121 | \f | |
9115729e KH |
4122 | /* Subroutine of report_overlay_modification. */ |
4123 | ||
4124 | /* Lisp vector holding overlay hook functions to call. | |
4125 | Vector elements come in pairs. | |
4126 | Each even-index element is a list of hook functions. | |
4127 | The following odd-index element is the overlay they came from. | |
4128 | ||
4129 | Before the buffer change, we fill in this vector | |
4130 | as we call overlay hook functions. | |
4131 | After the buffer change, we get the functions to call from this vector. | |
4132 | This way we always call the same functions before and after the change. */ | |
4133 | static Lisp_Object last_overlay_modification_hooks; | |
4134 | ||
4135 | /* Number of elements actually used in last_overlay_modification_hooks. */ | |
4136 | static int last_overlay_modification_hooks_used; | |
4137 | ||
4138 | /* Add one functionlist/overlay pair | |
4139 | to the end of last_overlay_modification_hooks. */ | |
4140 | ||
4141 | static void | |
4142 | add_overlay_mod_hooklist (functionlist, overlay) | |
4143 | Lisp_Object functionlist, overlay; | |
4144 | { | |
4145 | int oldsize = XVECTOR (last_overlay_modification_hooks)->size; | |
4146 | ||
4147 | if (last_overlay_modification_hooks_used == oldsize) | |
4148 | { | |
4149 | Lisp_Object old; | |
4150 | old = last_overlay_modification_hooks; | |
4151 | last_overlay_modification_hooks | |
4152 | = Fmake_vector (make_number (oldsize * 2), Qnil); | |
0b1f1b09 RS |
4153 | bcopy (XVECTOR (old)->contents, |
4154 | XVECTOR (last_overlay_modification_hooks)->contents, | |
9115729e KH |
4155 | sizeof (Lisp_Object) * oldsize); |
4156 | } | |
2410d73a SM |
4157 | AREF (last_overlay_modification_hooks, last_overlay_modification_hooks_used++) = functionlist; |
4158 | AREF (last_overlay_modification_hooks, last_overlay_modification_hooks_used++) = overlay; | |
9115729e KH |
4159 | } |
4160 | \f | |
173f2a64 RS |
4161 | /* Run the modification-hooks of overlays that include |
4162 | any part of the text in START to END. | |
9115729e KH |
4163 | If this change is an insertion, also |
4164 | run the insert-before-hooks of overlay starting at END, | |
930a9140 RS |
4165 | and the insert-after-hooks of overlay ending at START. |
4166 | ||
4167 | This is called both before and after the modification. | |
4168 | AFTER is nonzero when we call after the modification. | |
4169 | ||
9115729e KH |
4170 | ARG1, ARG2, ARG3 are arguments to pass to the hook functions. |
4171 | When AFTER is nonzero, they are the start position, | |
4172 | the position after the inserted new text, | |
4173 | and the length of deleted or replaced old text. */ | |
173f2a64 RS |
4174 | |
4175 | void | |
930a9140 | 4176 | report_overlay_modification (start, end, after, arg1, arg2, arg3) |
173f2a64 | 4177 | Lisp_Object start, end; |
930a9140 RS |
4178 | int after; |
4179 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 | 4180 | { |
2410d73a SM |
4181 | Lisp_Object prop, overlay; |
4182 | struct Lisp_Overlay *tail; | |
9115729e KH |
4183 | /* 1 if this change is an insertion. */ |
4184 | int insertion = (after ? XFASTINT (arg3) == 0 : EQ (start, end)); | |
a615c6dc | 4185 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
55b48893 RS |
4186 | |
4187 | overlay = Qnil; | |
2410d73a | 4188 | tail = NULL; |
9115729e | 4189 | |
27c6b98e SM |
4190 | /* We used to run the functions as soon as we found them and only register |
4191 | them in last_overlay_modification_hooks for the purpose of the `after' | |
4192 | case. But running elisp code as we traverse the list of overlays is | |
4193 | painful because the list can be modified by the elisp code so we had to | |
4194 | copy at several places. We now simply do a read-only traversal that | |
4195 | only collects the functions to run and we run them afterwards. It's | |
4196 | simpler, especially since all the code was already there. -stef */ | |
4197 | ||
a615c6dc | 4198 | if (!after) |
173f2a64 | 4199 | { |
a615c6dc SM |
4200 | /* We are being called before a change. |
4201 | Scan the overlays to find the functions to call. */ | |
4202 | last_overlay_modification_hooks_used = 0; | |
2410d73a | 4203 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
173f2a64 | 4204 | { |
a615c6dc SM |
4205 | int startpos, endpos; |
4206 | Lisp_Object ostart, oend; | |
4207 | ||
2410d73a | 4208 | XSETMISC (overlay, tail); |
a615c6dc SM |
4209 | |
4210 | ostart = OVERLAY_START (overlay); | |
4211 | oend = OVERLAY_END (overlay); | |
4212 | endpos = OVERLAY_POSITION (oend); | |
4213 | if (XFASTINT (start) > endpos) | |
4214 | break; | |
4215 | startpos = OVERLAY_POSITION (ostart); | |
4216 | if (insertion && (XFASTINT (start) == startpos | |
4217 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4218 | { |
a615c6dc SM |
4219 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4220 | if (!NILP (prop)) | |
4221 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4222 | } |
a615c6dc SM |
4223 | if (insertion && (XFASTINT (start) == endpos |
4224 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4225 | { |
a615c6dc SM |
4226 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4227 | if (!NILP (prop)) | |
4228 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4229 | } |
a615c6dc SM |
4230 | /* Test for intersecting intervals. This does the right thing |
4231 | for both insertion and deletion. */ | |
4232 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4233 | { |
a615c6dc SM |
4234 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4235 | if (!NILP (prop)) | |
4236 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4237 | } |
173f2a64 | 4238 | } |
60ebfdf3 | 4239 | |
2410d73a | 4240 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
173f2a64 | 4241 | { |
a615c6dc SM |
4242 | int startpos, endpos; |
4243 | Lisp_Object ostart, oend; | |
4244 | ||
2410d73a | 4245 | XSETMISC (overlay, tail); |
a615c6dc SM |
4246 | |
4247 | ostart = OVERLAY_START (overlay); | |
4248 | oend = OVERLAY_END (overlay); | |
4249 | startpos = OVERLAY_POSITION (ostart); | |
4250 | endpos = OVERLAY_POSITION (oend); | |
4251 | if (XFASTINT (end) < startpos) | |
4252 | break; | |
4253 | if (insertion && (XFASTINT (start) == startpos | |
4254 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4255 | { |
a615c6dc SM |
4256 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4257 | if (!NILP (prop)) | |
4258 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4259 | } |
a615c6dc SM |
4260 | if (insertion && (XFASTINT (start) == endpos |
4261 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4262 | { |
a615c6dc SM |
4263 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4264 | if (!NILP (prop)) | |
4265 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4266 | } |
a615c6dc SM |
4267 | /* Test for intersecting intervals. This does the right thing |
4268 | for both insertion and deletion. */ | |
4269 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4270 | { |
a615c6dc SM |
4271 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4272 | if (!NILP (prop)) | |
4273 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4274 | } |
173f2a64 RS |
4275 | } |
4276 | } | |
55b48893 | 4277 | |
a615c6dc SM |
4278 | GCPRO4 (overlay, arg1, arg2, arg3); |
4279 | { | |
4280 | /* Call the functions recorded in last_overlay_modification_hooks. | |
4281 | First copy the vector contents, in case some of these hooks | |
4282 | do subsequent modification of the buffer. */ | |
4283 | int size = last_overlay_modification_hooks_used; | |
4284 | Lisp_Object *copy = (Lisp_Object *) alloca (size * sizeof (Lisp_Object)); | |
4285 | int i; | |
4286 | ||
4287 | bcopy (XVECTOR (last_overlay_modification_hooks)->contents, | |
4288 | copy, size * sizeof (Lisp_Object)); | |
4289 | gcpro1.var = copy; | |
4290 | gcpro1.nvars = size; | |
4291 | ||
4292 | for (i = 0; i < size;) | |
4293 | { | |
4294 | Lisp_Object prop, overlay; | |
4295 | prop = copy[i++]; | |
4296 | overlay = copy[i++]; | |
4297 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); | |
4298 | } | |
4299 | } | |
55b48893 | 4300 | UNGCPRO; |
173f2a64 RS |
4301 | } |
4302 | ||
4303 | static void | |
930a9140 RS |
4304 | call_overlay_mod_hooks (list, overlay, after, arg1, arg2, arg3) |
4305 | Lisp_Object list, overlay; | |
4306 | int after; | |
4307 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 | 4308 | { |
930a9140 | 4309 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
9115729e | 4310 | |
930a9140 | 4311 | GCPRO4 (list, arg1, arg2, arg3); |
9115729e | 4312 | |
6d70a280 | 4313 | while (CONSP (list)) |
173f2a64 | 4314 | { |
930a9140 | 4315 | if (NILP (arg3)) |
6d70a280 | 4316 | call4 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2); |
930a9140 | 4317 | else |
6d70a280 SM |
4318 | call5 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2, arg3); |
4319 | list = XCDR (list); | |
173f2a64 RS |
4320 | } |
4321 | UNGCPRO; | |
4322 | } | |
9d7608b7 KH |
4323 | |
4324 | /* Delete any zero-sized overlays at position POS, if the `evaporate' | |
4325 | property is set. */ | |
4326 | void | |
4327 | evaporate_overlays (pos) | |
c2d5b10f | 4328 | EMACS_INT pos; |
9d7608b7 | 4329 | { |
2410d73a SM |
4330 | Lisp_Object overlay, hit_list; |
4331 | struct Lisp_Overlay *tail; | |
9d7608b7 KH |
4332 | |
4333 | hit_list = Qnil; | |
c2d5b10f | 4334 | if (pos <= current_buffer->overlay_center) |
2410d73a | 4335 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
9d7608b7 KH |
4336 | { |
4337 | int endpos; | |
2410d73a | 4338 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4339 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
4340 | if (endpos < pos) | |
4341 | break; | |
4342 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos | |
c3935f9d | 4343 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4344 | hit_list = Fcons (overlay, hit_list); |
4345 | } | |
4346 | else | |
2410d73a | 4347 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
9d7608b7 KH |
4348 | { |
4349 | int startpos; | |
2410d73a | 4350 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4351 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
4352 | if (startpos > pos) | |
4353 | break; | |
4354 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos | |
c3935f9d | 4355 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4356 | hit_list = Fcons (overlay, hit_list); |
4357 | } | |
7539e11f KR |
4358 | for (; CONSP (hit_list); hit_list = XCDR (hit_list)) |
4359 | Fdelete_overlay (XCAR (hit_list)); | |
9d7608b7 | 4360 | } |
173f2a64 | 4361 | \f |
54dfdeb0 | 4362 | /* Somebody has tried to store a value with an unacceptable type |
1bf08baf KH |
4363 | in the slot with offset OFFSET. */ |
4364 | ||
0fa3ba92 | 4365 | void |
54dfdeb0 KH |
4366 | buffer_slot_type_mismatch (offset) |
4367 | int offset; | |
0fa3ba92 | 4368 | { |
54dfdeb0 | 4369 | Lisp_Object sym; |
0fa3ba92 | 4370 | char *type_name; |
177c0ea7 | 4371 | |
7313acd0 | 4372 | switch (XINT (PER_BUFFER_TYPE (offset))) |
0fa3ba92 | 4373 | { |
7c02e886 GM |
4374 | case Lisp_Int: |
4375 | type_name = "integers"; | |
4376 | break; | |
177c0ea7 | 4377 | |
7c02e886 GM |
4378 | case Lisp_String: |
4379 | type_name = "strings"; | |
4380 | break; | |
177c0ea7 | 4381 | |
7c02e886 GM |
4382 | case Lisp_Symbol: |
4383 | type_name = "symbols"; | |
4384 | break; | |
177c0ea7 | 4385 | |
0fa3ba92 JB |
4386 | default: |
4387 | abort (); | |
4388 | } | |
4389 | ||
7313acd0 | 4390 | sym = PER_BUFFER_SYMBOL (offset); |
1bf08baf | 4391 | error ("Only %s should be stored in the buffer-local variable %s", |
d5db4077 | 4392 | type_name, SDATA (SYMBOL_NAME (sym))); |
0fa3ba92 | 4393 | } |
7c02e886 | 4394 | |
0fa3ba92 | 4395 | \f |
b86af064 GM |
4396 | /*********************************************************************** |
4397 | Allocation with mmap | |
4398 | ***********************************************************************/ | |
4399 | ||
4400 | #ifdef USE_MMAP_FOR_BUFFERS | |
4401 | ||
4402 | #include <sys/types.h> | |
4403 | #include <sys/mman.h> | |
4404 | ||
4405 | #ifndef MAP_ANON | |
4406 | #ifdef MAP_ANONYMOUS | |
4407 | #define MAP_ANON MAP_ANONYMOUS | |
4408 | #else | |
4409 | #define MAP_ANON 0 | |
4410 | #endif | |
4411 | #endif | |
4412 | ||
09dfdf85 GM |
4413 | #ifndef MAP_FAILED |
4414 | #define MAP_FAILED ((void *) -1) | |
4415 | #endif | |
4416 | ||
b86af064 GM |
4417 | #include <stdio.h> |
4418 | #include <errno.h> | |
4419 | ||
4420 | #if MAP_ANON == 0 | |
4421 | #include <fcntl.h> | |
4422 | #endif | |
4423 | ||
4424 | #include "coding.h" | |
4425 | ||
4426 | ||
4427 | /* Memory is allocated in regions which are mapped using mmap(2). | |
4428 | The current implementation lets the system select mapped | |
4429 | addresses; we're not using MAP_FIXED in general, except when | |
4430 | trying to enlarge regions. | |
4431 | ||
4432 | Each mapped region starts with a mmap_region structure, the user | |
4433 | area starts after that structure, aligned to MEM_ALIGN. | |
4434 | ||
4435 | +-----------------------+ | |
4436 | | struct mmap_info + | | |
4437 | | padding | | |
4438 | +-----------------------+ | |
4439 | | user data | | |
4440 | | | | |
4441 | | | | |
4442 | +-----------------------+ */ | |
4443 | ||
4444 | struct mmap_region | |
4445 | { | |
4446 | /* User-specified size. */ | |
4447 | size_t nbytes_specified; | |
177c0ea7 | 4448 | |
b86af064 GM |
4449 | /* Number of bytes mapped */ |
4450 | size_t nbytes_mapped; | |
4451 | ||
4452 | /* Pointer to the location holding the address of the memory | |
4453 | allocated with the mmap'd block. The variable actually points | |
4454 | after this structure. */ | |
4455 | POINTER_TYPE **var; | |
4456 | ||
4457 | /* Next and previous in list of all mmap'd regions. */ | |
4458 | struct mmap_region *next, *prev; | |
4459 | }; | |
4460 | ||
4461 | /* Doubly-linked list of mmap'd regions. */ | |
4462 | ||
4463 | static struct mmap_region *mmap_regions; | |
4464 | ||
4465 | /* File descriptor for mmap. If we don't have anonymous mapping, | |
4466 | /dev/zero will be opened on it. */ | |
4467 | ||
4468 | static int mmap_fd; | |
4469 | ||
4470 | /* Temporary storage for mmap_set_vars, see there. */ | |
4471 | ||
4472 | static struct mmap_region *mmap_regions_1; | |
4473 | static int mmap_fd_1; | |
4474 | ||
4475 | /* Page size on this system. */ | |
4476 | ||
4477 | static int mmap_page_size; | |
4478 | ||
4479 | /* 1 means mmap has been intialized. */ | |
4480 | ||
4481 | static int mmap_initialized_p; | |
4482 | ||
4483 | /* Value is X rounded up to the next multiple of N. */ | |
4484 | ||
4485 | #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N)) | |
4486 | ||
4487 | /* Size of mmap_region structure plus padding. */ | |
4488 | ||
4489 | #define MMAP_REGION_STRUCT_SIZE \ | |
4490 | ROUND (sizeof (struct mmap_region), MEM_ALIGN) | |
4491 | ||
4492 | /* Given a pointer P to the start of the user-visible part of a mapped | |
4493 | region, return a pointer to the start of the region. */ | |
4494 | ||
4495 | #define MMAP_REGION(P) \ | |
4496 | ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE)) | |
4497 | ||
4498 | /* Given a pointer P to the start of a mapped region, return a pointer | |
4499 | to the start of the user-visible part of the region. */ | |
4500 | ||
4501 | #define MMAP_USER_AREA(P) \ | |
4502 | ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE)) | |
4503 | ||
4504 | #define MEM_ALIGN sizeof (double) | |
4505 | ||
7273faa1 DL |
4506 | /* Predicate returning true if part of the address range [START .. END] |
4507 | is currently mapped. Used to prevent overwriting an existing | |
08327b22 GM |
4508 | memory mapping. |
4509 | ||
4510 | Default is to conservativly assume the address range is occupied by | |
4511 | something else. This can be overridden by system configuration | |
4512 | files if system-specific means to determine this exists. */ | |
4513 | ||
4514 | #ifndef MMAP_ALLOCATED_P | |
4515 | #define MMAP_ALLOCATED_P(start, end) 1 | |
4516 | #endif | |
4517 | ||
b86af064 GM |
4518 | /* Function prototypes. */ |
4519 | ||
4520 | static int mmap_free_1 P_ ((struct mmap_region *)); | |
4521 | static int mmap_enlarge P_ ((struct mmap_region *, int)); | |
4522 | static struct mmap_region *mmap_find P_ ((POINTER_TYPE *, POINTER_TYPE *)); | |
4523 | static POINTER_TYPE *mmap_alloc P_ ((POINTER_TYPE **, size_t)); | |
4524 | static POINTER_TYPE *mmap_realloc P_ ((POINTER_TYPE **, size_t)); | |
4525 | static void mmap_free P_ ((POINTER_TYPE **ptr)); | |
4526 | static void mmap_init P_ ((void)); | |
4527 | ||
4528 | ||
4529 | /* Return a region overlapping address range START...END, or null if | |
4530 | none. END is not including, i.e. the last byte in the range | |
4531 | is at END - 1. */ | |
4532 | ||
4533 | static struct mmap_region * | |
4534 | mmap_find (start, end) | |
4535 | POINTER_TYPE *start, *end; | |
4536 | { | |
4537 | struct mmap_region *r; | |
4538 | char *s = (char *) start, *e = (char *) end; | |
177c0ea7 | 4539 | |
b86af064 GM |
4540 | for (r = mmap_regions; r; r = r->next) |
4541 | { | |
4542 | char *rstart = (char *) r; | |
4543 | char *rend = rstart + r->nbytes_mapped; | |
4544 | ||
4545 | if (/* First byte of range, i.e. START, in this region? */ | |
4546 | (s >= rstart && s < rend) | |
4547 | /* Last byte of range, i.e. END - 1, in this region? */ | |
4548 | || (e > rstart && e <= rend) | |
4549 | /* First byte of this region in the range? */ | |
4550 | || (rstart >= s && rstart < e) | |
4551 | /* Last byte of this region in the range? */ | |
4552 | || (rend > s && rend <= e)) | |
4553 | break; | |
4554 | } | |
4555 | ||
4556 | return r; | |
4557 | } | |
4558 | ||
4559 | ||
4560 | /* Unmap a region. P is a pointer to the start of the user-araa of | |
4561 | the region. Value is non-zero if successful. */ | |
4562 | ||
4563 | static int | |
4564 | mmap_free_1 (r) | |
4565 | struct mmap_region *r; | |
4566 | { | |
4567 | if (r->next) | |
4568 | r->next->prev = r->prev; | |
4569 | if (r->prev) | |
4570 | r->prev->next = r->next; | |
4571 | else | |
4572 | mmap_regions = r->next; | |
177c0ea7 | 4573 | |
1a15cca0 | 4574 | if (munmap ((POINTER_TYPE *) r, r->nbytes_mapped) == -1) |
b86af064 GM |
4575 | { |
4576 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4577 | return 0; | |
4578 | } | |
4579 | ||
4580 | return 1; | |
4581 | } | |
4582 | ||
4583 | ||
4584 | /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R. | |
4585 | Value is non-zero if successful. */ | |
4586 | ||
4587 | static int | |
4588 | mmap_enlarge (r, npages) | |
4589 | struct mmap_region *r; | |
4590 | int npages; | |
4591 | { | |
4592 | char *region_end = (char *) r + r->nbytes_mapped; | |
4593 | size_t nbytes; | |
4594 | int success = 0; | |
4595 | ||
4596 | if (npages < 0) | |
4597 | { | |
4598 | /* Unmap pages at the end of the region. */ | |
4599 | nbytes = - npages * mmap_page_size; | |
4600 | if (munmap (region_end - nbytes, nbytes) == -1) | |
4601 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4602 | else | |
4603 | { | |
4604 | r->nbytes_mapped -= nbytes; | |
4605 | success = 1; | |
4606 | } | |
4607 | } | |
4608 | else if (npages > 0) | |
4609 | { | |
b86af064 | 4610 | nbytes = npages * mmap_page_size; |
177c0ea7 | 4611 | |
b86af064 GM |
4612 | /* Try to map additional pages at the end of the region. We |
4613 | cannot do this if the address range is already occupied by | |
4614 | something else because mmap deletes any previous mapping. | |
4615 | I'm not sure this is worth doing, let's see. */ | |
08327b22 | 4616 | if (!MMAP_ALLOCATED_P (region_end, region_end + nbytes)) |
b86af064 GM |
4617 | { |
4618 | POINTER_TYPE *p; | |
177c0ea7 | 4619 | |
b86af064 GM |
4620 | p = mmap (region_end, nbytes, PROT_READ | PROT_WRITE, |
4621 | MAP_ANON | MAP_PRIVATE | MAP_FIXED, mmap_fd, 0); | |
4622 | if (p == MAP_FAILED) | |
edaa9aed | 4623 | ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */ |
b86af064 GM |
4624 | else if (p != (POINTER_TYPE *) region_end) |
4625 | { | |
4626 | /* Kernels are free to choose a different address. In | |
4627 | that case, unmap what we've mapped above; we have | |
4628 | no use for it. */ | |
4629 | if (munmap (p, nbytes) == -1) | |
4630 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4631 | } | |
4632 | else | |
4633 | { | |
4634 | r->nbytes_mapped += nbytes; | |
4635 | success = 1; | |
4636 | } | |
4637 | } | |
4638 | } | |
4639 | ||
4640 | return success; | |
4641 | } | |
4642 | ||
4643 | ||
4644 | /* Set or reset variables holding references to mapped regions. If | |
4645 | RESTORE_P is zero, set all variables to null. If RESTORE_P is | |
4646 | non-zero, set all variables to the start of the user-areas | |
4647 | of mapped regions. | |
4648 | ||
4649 | This function is called from Fdump_emacs to ensure that the dumped | |
4650 | Emacs doesn't contain references to memory that won't be mapped | |
4651 | when Emacs starts. */ | |
4652 | ||
4653 | void | |
4654 | mmap_set_vars (restore_p) | |
4655 | int restore_p; | |
4656 | { | |
4657 | struct mmap_region *r; | |
4658 | ||
4659 | if (restore_p) | |
4660 | { | |
4661 | mmap_regions = mmap_regions_1; | |
4662 | mmap_fd = mmap_fd_1; | |
4663 | for (r = mmap_regions; r; r = r->next) | |
4664 | *r->var = MMAP_USER_AREA (r); | |
4665 | } | |
4666 | else | |
4667 | { | |
4668 | for (r = mmap_regions; r; r = r->next) | |
4669 | *r->var = NULL; | |
4670 | mmap_regions_1 = mmap_regions; | |
4671 | mmap_regions = NULL; | |
4672 | mmap_fd_1 = mmap_fd; | |
4673 | mmap_fd = -1; | |
4674 | } | |
4675 | } | |
4676 | ||
4677 | ||
4678 | /* Allocate a block of storage large enough to hold NBYTES bytes of | |
4679 | data. A pointer to the data is returned in *VAR. VAR is thus the | |
4680 | address of some variable which will use the data area. | |
4681 | ||
4682 | The allocation of 0 bytes is valid. | |
4683 | ||
4684 | If we can't allocate the necessary memory, set *VAR to null, and | |
4685 | return null. */ | |
4686 | ||
4687 | static POINTER_TYPE * | |
4688 | mmap_alloc (var, nbytes) | |
4689 | POINTER_TYPE **var; | |
4690 | size_t nbytes; | |
4691 | { | |
4692 | void *p; | |
4693 | size_t map; | |
4694 | ||
4695 | mmap_init (); | |
4696 | ||
4697 | map = ROUND (nbytes + MMAP_REGION_STRUCT_SIZE, mmap_page_size); | |
4698 | p = mmap (NULL, map, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, | |
4699 | mmap_fd, 0); | |
177c0ea7 | 4700 | |
b86af064 GM |
4701 | if (p == MAP_FAILED) |
4702 | { | |
4703 | if (errno != ENOMEM) | |
4704 | fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); | |
4705 | p = NULL; | |
4706 | } | |
4707 | else | |
4708 | { | |
4709 | struct mmap_region *r = (struct mmap_region *) p; | |
177c0ea7 | 4710 | |
b86af064 GM |
4711 | r->nbytes_specified = nbytes; |
4712 | r->nbytes_mapped = map; | |
4713 | r->var = var; | |
4714 | r->prev = NULL; | |
4715 | r->next = mmap_regions; | |
4716 | if (r->next) | |
4717 | r->next->prev = r; | |
4718 | mmap_regions = r; | |
177c0ea7 | 4719 | |
b86af064 GM |
4720 | p = MMAP_USER_AREA (p); |
4721 | } | |
177c0ea7 | 4722 | |
b86af064 GM |
4723 | return *var = p; |
4724 | } | |
4725 | ||
4726 | ||
4727 | /* Given a pointer at address VAR to data allocated with mmap_alloc, | |
4728 | resize it to size NBYTES. Change *VAR to reflect the new block, | |
4729 | and return this value. If more memory cannot be allocated, then | |
4730 | leave *VAR unchanged, and return null. */ | |
4731 | ||
4732 | static POINTER_TYPE * | |
4733 | mmap_realloc (var, nbytes) | |
4734 | POINTER_TYPE **var; | |
4735 | size_t nbytes; | |
4736 | { | |
4737 | POINTER_TYPE *result; | |
177c0ea7 | 4738 | |
b86af064 GM |
4739 | mmap_init (); |
4740 | ||
4741 | if (*var == NULL) | |
4742 | result = mmap_alloc (var, nbytes); | |
177c0ea7 | 4743 | else if (nbytes == 0) |
b86af064 GM |
4744 | { |
4745 | mmap_free (var); | |
4746 | result = mmap_alloc (var, nbytes); | |
4747 | } | |
4748 | else | |
4749 | { | |
4750 | struct mmap_region *r = MMAP_REGION (*var); | |
4751 | size_t room = r->nbytes_mapped - MMAP_REGION_STRUCT_SIZE; | |
177c0ea7 | 4752 | |
b86af064 GM |
4753 | if (room < nbytes) |
4754 | { | |
4755 | /* Must enlarge. */ | |
4756 | POINTER_TYPE *old_ptr = *var; | |
4757 | ||
4758 | /* Try to map additional pages at the end of the region. | |
4759 | If that fails, allocate a new region, copy data | |
4760 | from the old region, then free it. */ | |
4761 | if (mmap_enlarge (r, (ROUND (nbytes - room, mmap_page_size) | |
4762 | / mmap_page_size))) | |
4763 | { | |
4764 | r->nbytes_specified = nbytes; | |
4765 | *var = result = old_ptr; | |
4766 | } | |
4767 | else if (mmap_alloc (var, nbytes)) | |
4768 | { | |
4769 | bcopy (old_ptr, *var, r->nbytes_specified); | |
4770 | mmap_free_1 (MMAP_REGION (old_ptr)); | |
4771 | result = *var; | |
4772 | r = MMAP_REGION (result); | |
4773 | r->nbytes_specified = nbytes; | |
4774 | } | |
4775 | else | |
4776 | { | |
4777 | *var = old_ptr; | |
4778 | result = NULL; | |
4779 | } | |
4780 | } | |
4781 | else if (room - nbytes >= mmap_page_size) | |
4782 | { | |
4783 | /* Shrinking by at least a page. Let's give some | |
6bcdeb8c KR |
4784 | memory back to the system. |
4785 | ||
4786 | The extra parens are to make the division happens first, | |
4787 | on positive values, so we know it will round towards | |
4788 | zero. */ | |
bb63c5c9 | 4789 | mmap_enlarge (r, - ((room - nbytes) / mmap_page_size)); |
b86af064 GM |
4790 | result = *var; |
4791 | r->nbytes_specified = nbytes; | |
4792 | } | |
4793 | else | |
4794 | { | |
4795 | /* Leave it alone. */ | |
4796 | result = *var; | |
4797 | r->nbytes_specified = nbytes; | |
4798 | } | |
4799 | } | |
4800 | ||
4801 | return result; | |
4802 | } | |
4803 | ||
4804 | ||
4805 | /* Free a block of relocatable storage whose data is pointed to by | |
4806 | PTR. Store 0 in *PTR to show there's no block allocated. */ | |
4807 | ||
4808 | static void | |
4809 | mmap_free (var) | |
4810 | POINTER_TYPE **var; | |
4811 | { | |
4812 | mmap_init (); | |
177c0ea7 | 4813 | |
b86af064 GM |
4814 | if (*var) |
4815 | { | |
4816 | mmap_free_1 (MMAP_REGION (*var)); | |
4817 | *var = NULL; | |
4818 | } | |
4819 | } | |
4820 | ||
4821 | ||
4822 | /* Perform necessary intializations for the use of mmap. */ | |
4823 | ||
4824 | static void | |
4825 | mmap_init () | |
4826 | { | |
4827 | #if MAP_ANON == 0 | |
4828 | /* The value of mmap_fd is initially 0 in temacs, and -1 | |
4829 | in a dumped Emacs. */ | |
4830 | if (mmap_fd <= 0) | |
4831 | { | |
4832 | /* No anonymous mmap -- we need the file descriptor. */ | |
4833 | mmap_fd = open ("/dev/zero", O_RDONLY); | |
4834 | if (mmap_fd == -1) | |
4835 | fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno)); | |
4836 | } | |
4837 | #endif /* MAP_ANON == 0 */ | |
4838 | ||
4839 | if (mmap_initialized_p) | |
4840 | return; | |
4841 | mmap_initialized_p = 1; | |
177c0ea7 | 4842 | |
b86af064 GM |
4843 | #if MAP_ANON != 0 |
4844 | mmap_fd = -1; | |
4845 | #endif | |
177c0ea7 | 4846 | |
b86af064 GM |
4847 | mmap_page_size = getpagesize (); |
4848 | } | |
4849 | ||
4850 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
4851 | ||
4852 | ||
4853 | \f | |
4854 | /*********************************************************************** | |
4855 | Buffer-text Allocation | |
4856 | ***********************************************************************/ | |
4857 | ||
4858 | #ifdef REL_ALLOC | |
4859 | extern POINTER_TYPE *r_alloc P_ ((POINTER_TYPE **, size_t)); | |
4860 | extern POINTER_TYPE *r_re_alloc P_ ((POINTER_TYPE **, size_t)); | |
4861 | extern void r_alloc_free P_ ((POINTER_TYPE **ptr)); | |
4862 | #endif /* REL_ALLOC */ | |
4863 | ||
4864 | ||
4865 | /* Allocate NBYTES bytes for buffer B's text buffer. */ | |
4866 | ||
4867 | static void | |
4868 | alloc_buffer_text (b, nbytes) | |
4869 | struct buffer *b; | |
4870 | size_t nbytes; | |
4871 | { | |
4872 | POINTER_TYPE *p; | |
177c0ea7 | 4873 | |
b86af064 GM |
4874 | BLOCK_INPUT; |
4875 | #if defined USE_MMAP_FOR_BUFFERS | |
4876 | p = mmap_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4877 | #elif defined REL_ALLOC | |
4878 | p = r_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4879 | #else | |
815add84 | 4880 | p = xmalloc (nbytes); |
b86af064 | 4881 | #endif |
177c0ea7 | 4882 | |
b86af064 GM |
4883 | if (p == NULL) |
4884 | { | |
4885 | UNBLOCK_INPUT; | |
4886 | memory_full (); | |
4887 | } | |
4888 | ||
4889 | b->text->beg = (unsigned char *) p; | |
4890 | UNBLOCK_INPUT; | |
4891 | } | |
4892 | ||
4893 | /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means | |
4894 | shrink it. */ | |
4895 | ||
4896 | void | |
4897 | enlarge_buffer_text (b, delta) | |
4898 | struct buffer *b; | |
4899 | int delta; | |
4900 | { | |
4901 | POINTER_TYPE *p; | |
4902 | size_t nbytes = (BUF_Z_BYTE (b) - BUF_BEG_BYTE (b) + BUF_GAP_SIZE (b) + 1 | |
4903 | + delta); | |
4904 | BLOCK_INPUT; | |
4905 | #if defined USE_MMAP_FOR_BUFFERS | |
4906 | p = mmap_realloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4907 | #elif defined REL_ALLOC | |
4908 | p = r_re_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4909 | #else | |
4910 | p = xrealloc (b->text->beg, nbytes); | |
4911 | #endif | |
177c0ea7 | 4912 | |
b86af064 GM |
4913 | if (p == NULL) |
4914 | { | |
4915 | UNBLOCK_INPUT; | |
4916 | memory_full (); | |
4917 | } | |
4918 | ||
4919 | BUF_BEG_ADDR (b) = (unsigned char *) p; | |
4920 | UNBLOCK_INPUT; | |
4921 | } | |
4922 | ||
4923 | ||
4924 | /* Free buffer B's text buffer. */ | |
4925 | ||
4926 | static void | |
4927 | free_buffer_text (b) | |
4928 | struct buffer *b; | |
4929 | { | |
4930 | BLOCK_INPUT; | |
4931 | ||
4932 | #if defined USE_MMAP_FOR_BUFFERS | |
4933 | mmap_free ((POINTER_TYPE **) &b->text->beg); | |
4934 | #elif defined REL_ALLOC | |
4935 | r_alloc_free ((POINTER_TYPE **) &b->text->beg); | |
4936 | #else | |
4937 | xfree (b->text->beg); | |
4938 | #endif | |
177c0ea7 | 4939 | |
b86af064 GM |
4940 | BUF_BEG_ADDR (b) = NULL; |
4941 | UNBLOCK_INPUT; | |
4942 | } | |
4943 | ||
4944 | ||
4945 | \f | |
4946 | /*********************************************************************** | |
4947 | Initialization | |
4948 | ***********************************************************************/ | |
4949 | ||
dfcf069d | 4950 | void |
1ab256cb RM |
4951 | init_buffer_once () |
4952 | { | |
7c02e886 GM |
4953 | int idx; |
4954 | ||
4955 | bzero (buffer_permanent_local_flags, sizeof buffer_permanent_local_flags); | |
13de9290 | 4956 | |
1ab256cb RM |
4957 | /* Make sure all markable slots in buffer_defaults |
4958 | are initialized reasonably, so mark_buffer won't choke. */ | |
4959 | reset_buffer (&buffer_defaults); | |
13de9290 | 4960 | reset_buffer_local_variables (&buffer_defaults, 1); |
1ab256cb | 4961 | reset_buffer (&buffer_local_symbols); |
13de9290 | 4962 | reset_buffer_local_variables (&buffer_local_symbols, 1); |
336cd056 RS |
4963 | /* Prevent GC from getting confused. */ |
4964 | buffer_defaults.text = &buffer_defaults.own_text; | |
4965 | buffer_local_symbols.text = &buffer_local_symbols.own_text; | |
336cd056 RS |
4966 | BUF_INTERVALS (&buffer_defaults) = 0; |
4967 | BUF_INTERVALS (&buffer_local_symbols) = 0; | |
67180c6a KH |
4968 | XSETBUFFER (Vbuffer_defaults, &buffer_defaults); |
4969 | XSETBUFFER (Vbuffer_local_symbols, &buffer_local_symbols); | |
1ab256cb RM |
4970 | |
4971 | /* Set up the default values of various buffer slots. */ | |
4972 | /* Must do these before making the first buffer! */ | |
4973 | ||
f532dca0 | 4974 | /* real setup is done in bindings.el */ |
1ab256cb | 4975 | buffer_defaults.mode_line_format = build_string ("%-"); |
045dee35 | 4976 | buffer_defaults.header_line_format = Qnil; |
1ab256cb RM |
4977 | buffer_defaults.abbrev_mode = Qnil; |
4978 | buffer_defaults.overwrite_mode = Qnil; | |
4979 | buffer_defaults.case_fold_search = Qt; | |
4980 | buffer_defaults.auto_fill_function = Qnil; | |
4981 | buffer_defaults.selective_display = Qnil; | |
4982 | #ifndef old | |
4983 | buffer_defaults.selective_display_ellipses = Qt; | |
4984 | #endif | |
4985 | buffer_defaults.abbrev_table = Qnil; | |
4986 | buffer_defaults.display_table = Qnil; | |
1ab256cb | 4987 | buffer_defaults.undo_list = Qnil; |
c48f61ef | 4988 | buffer_defaults.mark_active = Qnil; |
be9aafdd | 4989 | buffer_defaults.file_format = Qnil; |
71ed49fa | 4990 | buffer_defaults.auto_save_file_format = Qt; |
2410d73a SM |
4991 | buffer_defaults.overlays_before = NULL; |
4992 | buffer_defaults.overlays_after = NULL; | |
c2d5b10f | 4993 | buffer_defaults.overlay_center = BEG; |
1ab256cb | 4994 | |
8d7a4592 | 4995 | XSETFASTINT (buffer_defaults.tab_width, 8); |
1ab256cb RM |
4996 | buffer_defaults.truncate_lines = Qnil; |
4997 | buffer_defaults.ctl_arrow = Qt; | |
3b06f880 | 4998 | buffer_defaults.direction_reversed = Qnil; |
bb2ec976 | 4999 | buffer_defaults.cursor_type = Qt; |
a3bbced0 | 5000 | buffer_defaults.extra_line_spacing = Qnil; |
187ccf49 | 5001 | buffer_defaults.cursor_in_non_selected_windows = Qt; |
1ab256cb | 5002 | |
f7975d07 | 5003 | #ifdef DOS_NT |
0776cb1b | 5004 | buffer_defaults.buffer_file_type = Qnil; /* TEXT */ |
54ad07d3 | 5005 | #endif |
a1a17b61 | 5006 | buffer_defaults.enable_multibyte_characters = Qt; |
c71b5d9b | 5007 | buffer_defaults.buffer_file_coding_system = Qnil; |
8d7a4592 KH |
5008 | XSETFASTINT (buffer_defaults.fill_column, 70); |
5009 | XSETFASTINT (buffer_defaults.left_margin, 0); | |
28e969dd | 5010 | buffer_defaults.cache_long_line_scans = Qnil; |
f6ed2e84 | 5011 | buffer_defaults.file_truename = Qnil; |
7962a441 | 5012 | XSETFASTINT (buffer_defaults.display_count, 0); |
2ad8731a KS |
5013 | XSETFASTINT (buffer_defaults.left_margin_cols, 0); |
5014 | XSETFASTINT (buffer_defaults.right_margin_cols, 0); | |
5015 | buffer_defaults.left_fringe_width = Qnil; | |
5016 | buffer_defaults.right_fringe_width = Qnil; | |
5017 | buffer_defaults.fringes_outside_margins = Qnil; | |
5018 | buffer_defaults.scroll_bar_width = Qnil; | |
5019 | buffer_defaults.vertical_scroll_bar_type = Qt; | |
0552666b | 5020 | buffer_defaults.indicate_empty_lines = Qnil; |
8e8767f8 | 5021 | buffer_defaults.indicate_buffer_boundaries = Qnil; |
c6a46372 KS |
5022 | buffer_defaults.fringe_indicator_alist = Qnil; |
5023 | buffer_defaults.fringe_cursor_alist = Qnil; | |
0552666b GM |
5024 | buffer_defaults.scroll_up_aggressively = Qnil; |
5025 | buffer_defaults.scroll_down_aggressively = Qnil; | |
3fd364db | 5026 | buffer_defaults.display_time = Qnil; |
1ab256cb RM |
5027 | |
5028 | /* Assign the local-flags to the slots that have default values. | |
5029 | The local flag is a bit that is used in the buffer | |
5030 | to say that it has its own local value for the slot. | |
5031 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
5032 | ||
5033 | /* Nothing can work if this isn't true */ | |
4d2f1389 | 5034 | if (sizeof (EMACS_INT) != sizeof (Lisp_Object)) abort (); |
1ab256cb RM |
5035 | |
5036 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
5037 | bzero (&buffer_local_flags, sizeof buffer_local_flags); | |
aab80822 KH |
5038 | XSETINT (buffer_local_flags.filename, -1); |
5039 | XSETINT (buffer_local_flags.directory, -1); | |
5040 | XSETINT (buffer_local_flags.backed_up, -1); | |
5041 | XSETINT (buffer_local_flags.save_length, -1); | |
5042 | XSETINT (buffer_local_flags.auto_save_file_name, -1); | |
5043 | XSETINT (buffer_local_flags.read_only, -1); | |
5044 | XSETINT (buffer_local_flags.major_mode, -1); | |
5045 | XSETINT (buffer_local_flags.mode_name, -1); | |
5046 | XSETINT (buffer_local_flags.undo_list, -1); | |
5047 | XSETINT (buffer_local_flags.mark_active, -1); | |
943e065b | 5048 | XSETINT (buffer_local_flags.point_before_scroll, -1); |
f6ed2e84 | 5049 | XSETINT (buffer_local_flags.file_truename, -1); |
3cb719bd | 5050 | XSETINT (buffer_local_flags.invisibility_spec, -1); |
55ac8536 | 5051 | XSETINT (buffer_local_flags.file_format, -1); |
71ed49fa | 5052 | XSETINT (buffer_local_flags.auto_save_file_format, -1); |
7962a441 | 5053 | XSETINT (buffer_local_flags.display_count, -1); |
3fd364db | 5054 | XSETINT (buffer_local_flags.display_time, -1); |
1bf08baf | 5055 | XSETINT (buffer_local_flags.enable_multibyte_characters, -1); |
8d7a4592 | 5056 | |
7c02e886 GM |
5057 | idx = 1; |
5058 | XSETFASTINT (buffer_local_flags.mode_line_format, idx); ++idx; | |
5059 | XSETFASTINT (buffer_local_flags.abbrev_mode, idx); ++idx; | |
5060 | XSETFASTINT (buffer_local_flags.overwrite_mode, idx); ++idx; | |
5061 | XSETFASTINT (buffer_local_flags.case_fold_search, idx); ++idx; | |
5062 | XSETFASTINT (buffer_local_flags.auto_fill_function, idx); ++idx; | |
5063 | XSETFASTINT (buffer_local_flags.selective_display, idx); ++idx; | |
1ab256cb | 5064 | #ifndef old |
7c02e886 | 5065 | XSETFASTINT (buffer_local_flags.selective_display_ellipses, idx); ++idx; |
1ab256cb | 5066 | #endif |
7c02e886 GM |
5067 | XSETFASTINT (buffer_local_flags.tab_width, idx); ++idx; |
5068 | XSETFASTINT (buffer_local_flags.truncate_lines, idx); ++idx; | |
5069 | XSETFASTINT (buffer_local_flags.ctl_arrow, idx); ++idx; | |
5070 | XSETFASTINT (buffer_local_flags.fill_column, idx); ++idx; | |
5071 | XSETFASTINT (buffer_local_flags.left_margin, idx); ++idx; | |
5072 | XSETFASTINT (buffer_local_flags.abbrev_table, idx); ++idx; | |
5073 | XSETFASTINT (buffer_local_flags.display_table, idx); ++idx; | |
f7975d07 | 5074 | #ifdef DOS_NT |
7c02e886 | 5075 | XSETFASTINT (buffer_local_flags.buffer_file_type, idx); |
13de9290 | 5076 | /* Make this one a permanent local. */ |
7c02e886 | 5077 | buffer_permanent_local_flags[idx++] = 1; |
54ad07d3 | 5078 | #endif |
7c02e886 GM |
5079 | XSETFASTINT (buffer_local_flags.syntax_table, idx); ++idx; |
5080 | XSETFASTINT (buffer_local_flags.cache_long_line_scans, idx); ++idx; | |
5081 | XSETFASTINT (buffer_local_flags.category_table, idx); ++idx; | |
5082 | XSETFASTINT (buffer_local_flags.direction_reversed, idx); ++idx; | |
177c0ea7 | 5083 | XSETFASTINT (buffer_local_flags.buffer_file_coding_system, idx); |
a1a17b61 | 5084 | /* Make this one a permanent local. */ |
7c02e886 | 5085 | buffer_permanent_local_flags[idx++] = 1; |
2ad8731a KS |
5086 | XSETFASTINT (buffer_local_flags.left_margin_cols, idx); ++idx; |
5087 | XSETFASTINT (buffer_local_flags.right_margin_cols, idx); ++idx; | |
5088 | XSETFASTINT (buffer_local_flags.left_fringe_width, idx); ++idx; | |
5089 | XSETFASTINT (buffer_local_flags.right_fringe_width, idx); ++idx; | |
5090 | XSETFASTINT (buffer_local_flags.fringes_outside_margins, idx); ++idx; | |
5091 | XSETFASTINT (buffer_local_flags.scroll_bar_width, idx); ++idx; | |
5092 | XSETFASTINT (buffer_local_flags.vertical_scroll_bar_type, idx); ++idx; | |
7c02e886 | 5093 | XSETFASTINT (buffer_local_flags.indicate_empty_lines, idx); ++idx; |
8e8767f8 | 5094 | XSETFASTINT (buffer_local_flags.indicate_buffer_boundaries, idx); ++idx; |
c6a46372 KS |
5095 | XSETFASTINT (buffer_local_flags.fringe_indicator_alist, idx); ++idx; |
5096 | XSETFASTINT (buffer_local_flags.fringe_cursor_alist, idx); ++idx; | |
7c02e886 GM |
5097 | XSETFASTINT (buffer_local_flags.scroll_up_aggressively, idx); ++idx; |
5098 | XSETFASTINT (buffer_local_flags.scroll_down_aggressively, idx); ++idx; | |
5099 | XSETFASTINT (buffer_local_flags.header_line_format, idx); ++idx; | |
bd96bd79 | 5100 | XSETFASTINT (buffer_local_flags.cursor_type, idx); ++idx; |
a3bbced0 | 5101 | XSETFASTINT (buffer_local_flags.extra_line_spacing, idx); ++idx; |
0124c5bd | 5102 | XSETFASTINT (buffer_local_flags.cursor_in_non_selected_windows, idx); ++idx; |
7c02e886 GM |
5103 | |
5104 | /* Need more room? */ | |
7313acd0 | 5105 | if (idx >= MAX_PER_BUFFER_VARS) |
7c02e886 | 5106 | abort (); |
7313acd0 | 5107 | last_per_buffer_idx = idx; |
177c0ea7 | 5108 | |
1ab256cb RM |
5109 | Vbuffer_alist = Qnil; |
5110 | current_buffer = 0; | |
5111 | all_buffers = 0; | |
5112 | ||
5113 | QSFundamental = build_string ("Fundamental"); | |
5114 | ||
5115 | Qfundamental_mode = intern ("fundamental-mode"); | |
5116 | buffer_defaults.major_mode = Qfundamental_mode; | |
5117 | ||
5118 | Qmode_class = intern ("mode-class"); | |
5119 | ||
5120 | Qprotected_field = intern ("protected-field"); | |
5121 | ||
5122 | Qpermanent_local = intern ("permanent-local"); | |
5123 | ||
5124 | Qkill_buffer_hook = intern ("kill-buffer-hook"); | |
fd6cfe11 | 5125 | Fput (Qkill_buffer_hook, Qpermanent_local, Qt); |
1ab256cb | 5126 | |
48265e61 DL |
5127 | Qucs_set_table_for_input = intern ("ucs-set-table-for-input"); |
5128 | ||
1ab256cb | 5129 | Vprin1_to_string_buffer = Fget_buffer_create (build_string (" prin1")); |
000f8083 | 5130 | |
1ab256cb RM |
5131 | /* super-magic invisible buffer */ |
5132 | Vbuffer_alist = Qnil; | |
5133 | ||
ffd56f97 | 5134 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
7775635d KH |
5135 | |
5136 | inhibit_modification_hooks = 0; | |
1ab256cb RM |
5137 | } |
5138 | ||
dfcf069d | 5139 | void |
1ab256cb RM |
5140 | init_buffer () |
5141 | { | |
2381d133 | 5142 | char *pwd; |
136351b7 | 5143 | Lisp_Object temp; |
b639c9be | 5144 | int len; |
1ab256cb | 5145 | |
b86af064 | 5146 | #ifdef USE_MMAP_FOR_BUFFERS |
93c27ef1 GM |
5147 | { |
5148 | /* When using the ralloc implementation based on mmap(2), buffer | |
5149 | text pointers will have been set to null in the dumped Emacs. | |
5150 | Map new memory. */ | |
5151 | struct buffer *b; | |
177c0ea7 | 5152 | |
93c27ef1 GM |
5153 | for (b = all_buffers; b; b = b->next) |
5154 | if (b->text->beg == NULL) | |
b86af064 | 5155 | enlarge_buffer_text (b, 0); |
93c27ef1 | 5156 | } |
b86af064 | 5157 | #endif /* USE_MMAP_FOR_BUFFERS */ |
177c0ea7 | 5158 | |
1ab256cb | 5159 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
3d871c85 RS |
5160 | if (NILP (buffer_defaults.enable_multibyte_characters)) |
5161 | Fset_buffer_multibyte (Qnil); | |
2381d133 | 5162 | |
01537133 | 5163 | pwd = get_current_dir_name (); |
a17b5ed1 | 5164 | |
156bdb41 | 5165 | if (!pwd) |
a17b5ed1 | 5166 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); |
1ab256cb RM |
5167 | |
5168 | #ifndef VMS | |
5169 | /* Maybe this should really use some standard subroutine | |
5170 | whose definition is filename syntax dependent. */ | |
b639c9be RF |
5171 | len = strlen (pwd); |
5172 | if (!(IS_DIRECTORY_SEP (pwd[len - 1]))) | |
f7975d07 | 5173 | { |
156bdb41 | 5174 | /* Grow buffer to add directory separator and '\0'. */ |
b639c9be RF |
5175 | pwd = (char *) xrealloc (pwd, len + 2); |
5176 | pwd[len] = DIRECTORY_SEP; | |
5177 | pwd[len + 1] = '\0'; | |
f7975d07 | 5178 | } |
1ab256cb | 5179 | #endif /* not VMS */ |
0995fa35 | 5180 | |
01537133 | 5181 | current_buffer->directory = make_unibyte_string (pwd, strlen (pwd)); |
dcd74c5f | 5182 | if (! NILP (buffer_defaults.enable_multibyte_characters)) |
f9962371 | 5183 | /* At this moment, we still don't know how to decode the |
156bdb41 | 5184 | directory name. So, we keep the bytes in multibyte form so |
dcd74c5f KH |
5185 | that ENCODE_FILE correctly gets the original bytes. */ |
5186 | current_buffer->directory | |
5187 | = string_to_multibyte (current_buffer->directory); | |
136351b7 | 5188 | |
0995fa35 RS |
5189 | /* Add /: to the front of the name |
5190 | if it would otherwise be treated as magic. */ | |
5191 | temp = Ffind_file_name_handler (current_buffer->directory, Qt); | |
81ab2e07 KH |
5192 | if (! NILP (temp) |
5193 | /* If the default dir is just /, TEMP is non-nil | |
5194 | because of the ange-ftp completion handler. | |
5195 | However, it is not necessary to turn / into /:/. | |
5196 | So avoid doing that. */ | |
d5db4077 | 5197 | && strcmp ("/", SDATA (current_buffer->directory))) |
0995fa35 RS |
5198 | current_buffer->directory |
5199 | = concat2 (build_string ("/:"), current_buffer->directory); | |
5200 | ||
136351b7 RS |
5201 | temp = get_minibuffer (0); |
5202 | XBUFFER (temp)->directory = current_buffer->directory; | |
01537133 EZ |
5203 | |
5204 | free (pwd); | |
1ab256cb RM |
5205 | } |
5206 | ||
5207 | /* initialize the buffer routines */ | |
dfcf069d | 5208 | void |
1ab256cb RM |
5209 | syms_of_buffer () |
5210 | { | |
9115729e KH |
5211 | staticpro (&last_overlay_modification_hooks); |
5212 | last_overlay_modification_hooks | |
5213 | = Fmake_vector (make_number (10), Qnil); | |
5214 | ||
1ab256cb RM |
5215 | staticpro (&Vbuffer_defaults); |
5216 | staticpro (&Vbuffer_local_symbols); | |
5217 | staticpro (&Qfundamental_mode); | |
5218 | staticpro (&Qmode_class); | |
5219 | staticpro (&QSFundamental); | |
5220 | staticpro (&Vbuffer_alist); | |
5221 | staticpro (&Qprotected_field); | |
5222 | staticpro (&Qpermanent_local); | |
5223 | staticpro (&Qkill_buffer_hook); | |
22378665 | 5224 | Qoverlayp = intern ("overlayp"); |
52f8ec73 | 5225 | staticpro (&Qoverlayp); |
9d7608b7 KH |
5226 | Qevaporate = intern ("evaporate"); |
5227 | staticpro (&Qevaporate); | |
294d215f | 5228 | Qmodification_hooks = intern ("modification-hooks"); |
22378665 | 5229 | staticpro (&Qmodification_hooks); |
294d215f | 5230 | Qinsert_in_front_hooks = intern ("insert-in-front-hooks"); |
22378665 | 5231 | staticpro (&Qinsert_in_front_hooks); |
294d215f | 5232 | Qinsert_behind_hooks = intern ("insert-behind-hooks"); |
22378665 | 5233 | staticpro (&Qinsert_behind_hooks); |
5fe0b67e | 5234 | Qget_file_buffer = intern ("get-file-buffer"); |
22378665 | 5235 | staticpro (&Qget_file_buffer); |
5985d248 KH |
5236 | Qpriority = intern ("priority"); |
5237 | staticpro (&Qpriority); | |
5238 | Qwindow = intern ("window"); | |
5239 | staticpro (&Qwindow); | |
bbbe9545 KH |
5240 | Qbefore_string = intern ("before-string"); |
5241 | staticpro (&Qbefore_string); | |
5242 | Qafter_string = intern ("after-string"); | |
5243 | staticpro (&Qafter_string); | |
22378665 RS |
5244 | Qfirst_change_hook = intern ("first-change-hook"); |
5245 | staticpro (&Qfirst_change_hook); | |
5246 | Qbefore_change_functions = intern ("before-change-functions"); | |
5247 | staticpro (&Qbefore_change_functions); | |
5248 | Qafter_change_functions = intern ("after-change-functions"); | |
5249 | staticpro (&Qafter_change_functions); | |
48265e61 | 5250 | staticpro (&Qucs_set_table_for_input); |
1ab256cb | 5251 | |
5b20caf0 RS |
5252 | Qkill_buffer_query_functions = intern ("kill-buffer-query-functions"); |
5253 | staticpro (&Qkill_buffer_query_functions); | |
5254 | ||
1ab256cb RM |
5255 | Fput (Qprotected_field, Qerror_conditions, |
5256 | Fcons (Qprotected_field, Fcons (Qerror, Qnil))); | |
5257 | Fput (Qprotected_field, Qerror_message, | |
5258 | build_string ("Attempt to modify a protected field")); | |
5259 | ||
5260 | /* All these use DEFVAR_LISP_NOPRO because the slots in | |
5261 | buffer_defaults will all be marked via Vbuffer_defaults. */ | |
5262 | ||
5263 | DEFVAR_LISP_NOPRO ("default-mode-line-format", | |
7ee72033 MB |
5264 | &buffer_defaults.mode_line_format, |
5265 | doc: /* Default value of `mode-line-format' for buffers that don't override it. | |
018ba359 | 5266 | This is the same as (default-value 'mode-line-format). */); |
1ab256cb | 5267 | |
045dee35 | 5268 | DEFVAR_LISP_NOPRO ("default-header-line-format", |
7ee72033 MB |
5269 | &buffer_defaults.header_line_format, |
5270 | doc: /* Default value of `header-line-format' for buffers that don't override it. | |
018ba359 | 5271 | This is the same as (default-value 'header-line-format). */); |
0552666b | 5272 | |
7ee72033 MB |
5273 | DEFVAR_LISP_NOPRO ("default-cursor-type", &buffer_defaults.cursor_type, |
5274 | doc: /* Default value of `cursor-type' for buffers that don't override it. | |
018ba359 | 5275 | This is the same as (default-value 'cursor-type). */); |
bd96bd79 | 5276 | |
a3bbced0 | 5277 | DEFVAR_LISP_NOPRO ("default-line-spacing", |
7ee72033 MB |
5278 | &buffer_defaults.extra_line_spacing, |
5279 | doc: /* Default value of `line-spacing' for buffers that don't override it. | |
018ba359 | 5280 | This is the same as (default-value 'line-spacing). */); |
a3bbced0 | 5281 | |
187ccf49 KS |
5282 | DEFVAR_LISP_NOPRO ("default-cursor-in-non-selected-windows", |
5283 | &buffer_defaults.cursor_in_non_selected_windows, | |
5284 | doc: /* Default value of `cursor-in-non-selected-windows'. | |
5285 | This is the same as (default-value 'cursor-in-non-selected-windows). */); | |
5286 | ||
1ab256cb | 5287 | DEFVAR_LISP_NOPRO ("default-abbrev-mode", |
efc7e75f | 5288 | &buffer_defaults.abbrev_mode, |
7ee72033 | 5289 | doc: /* Default value of `abbrev-mode' for buffers that do not override it. |
018ba359 | 5290 | This is the same as (default-value 'abbrev-mode). */); |
1ab256cb RM |
5291 | |
5292 | DEFVAR_LISP_NOPRO ("default-ctl-arrow", | |
efc7e75f | 5293 | &buffer_defaults.ctl_arrow, |
7ee72033 | 5294 | doc: /* Default value of `ctl-arrow' for buffers that do not override it. |
018ba359 | 5295 | This is the same as (default-value 'ctl-arrow). */); |
1ab256cb | 5296 | |
5e2ad10b JB |
5297 | DEFVAR_LISP_NOPRO ("default-direction-reversed", |
5298 | &buffer_defaults.direction_reversed, | |
5299 | doc: /* Default value of `direction-reversed' for buffers that do not override it. | |
018ba359 | 5300 | This is the same as (default-value 'direction-reversed). */); |
177c0ea7 | 5301 | |
5e2ad10b JB |
5302 | DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters", |
5303 | &buffer_defaults.enable_multibyte_characters, | |
5304 | doc: /* *Default value of `enable-multibyte-characters' for buffers not overriding it. | |
018ba359 | 5305 | This is the same as (default-value 'enable-multibyte-characters). */); |
177c0ea7 | 5306 | |
5e2ad10b JB |
5307 | DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system", |
5308 | &buffer_defaults.buffer_file_coding_system, | |
5309 | doc: /* Default value of `buffer-file-coding-system' for buffers not overriding it. | |
018ba359 | 5310 | This is the same as (default-value 'buffer-file-coding-system). */); |
177c0ea7 | 5311 | |
1ab256cb | 5312 | DEFVAR_LISP_NOPRO ("default-truncate-lines", |
efc7e75f PJ |
5313 | &buffer_defaults.truncate_lines, |
5314 | doc: /* Default value of `truncate-lines' for buffers that do not override it. | |
018ba359 | 5315 | This is the same as (default-value 'truncate-lines). */); |
1ab256cb RM |
5316 | |
5317 | DEFVAR_LISP_NOPRO ("default-fill-column", | |
efc7e75f PJ |
5318 | &buffer_defaults.fill_column, |
5319 | doc: /* Default value of `fill-column' for buffers that do not override it. | |
018ba359 | 5320 | This is the same as (default-value 'fill-column). */); |
1ab256cb RM |
5321 | |
5322 | DEFVAR_LISP_NOPRO ("default-left-margin", | |
efc7e75f PJ |
5323 | &buffer_defaults.left_margin, |
5324 | doc: /* Default value of `left-margin' for buffers that do not override it. | |
018ba359 | 5325 | This is the same as (default-value 'left-margin). */); |
1ab256cb RM |
5326 | |
5327 | DEFVAR_LISP_NOPRO ("default-tab-width", | |
7ee72033 MB |
5328 | &buffer_defaults.tab_width, |
5329 | doc: /* Default value of `tab-width' for buffers that do not override it. | |
018ba359 | 5330 | This is the same as (default-value 'tab-width). */); |
1ab256cb RM |
5331 | |
5332 | DEFVAR_LISP_NOPRO ("default-case-fold-search", | |
efc7e75f PJ |
5333 | &buffer_defaults.case_fold_search, |
5334 | doc: /* Default value of `case-fold-search' for buffers that don't override it. | |
018ba359 | 5335 | This is the same as (default-value 'case-fold-search). */); |
1ab256cb | 5336 | |
f7975d07 | 5337 | #ifdef DOS_NT |
177c0ea7 | 5338 | DEFVAR_LISP_NOPRO ("default-buffer-file-type", |
7ee72033 | 5339 | &buffer_defaults.buffer_file_type, |
efc7e75f | 5340 | doc: /* Default file type for buffers that do not override it. |
018ba359 PJ |
5341 | This is the same as (default-value 'buffer-file-type). |
5342 | The file type is nil for text, t for binary. */); | |
54ad07d3 RS |
5343 | #endif |
5344 | ||
0552666b | 5345 | DEFVAR_LISP_NOPRO ("default-left-margin-width", |
2ad8731a | 5346 | &buffer_defaults.left_margin_cols, |
efc7e75f | 5347 | doc: /* Default value of `left-margin-width' for buffers that don't override it. |
018ba359 | 5348 | This is the same as (default-value 'left-margin-width). */); |
0552666b GM |
5349 | |
5350 | DEFVAR_LISP_NOPRO ("default-right-margin-width", | |
2ad8731a KS |
5351 | &buffer_defaults.right_margin_cols, |
5352 | doc: /* Default value of `right-margin-width' for buffers that don't override it. | |
018ba359 | 5353 | This is the same as (default-value 'right-margin-width). */); |
177c0ea7 | 5354 | |
2ad8731a KS |
5355 | DEFVAR_LISP_NOPRO ("default-left-fringe-width", |
5356 | &buffer_defaults.left_fringe_width, | |
5357 | doc: /* Default value of `left-fringe-width' for buffers that don't override it. | |
5358 | This is the same as (default-value 'left-fringe-width). */); | |
5359 | ||
5360 | DEFVAR_LISP_NOPRO ("default-right-fringe-width", | |
5361 | &buffer_defaults.right_fringe_width, | |
5362 | doc: /* Default value of `right-fringe-width' for buffers that don't override it. | |
5363 | This is the same as (default-value 'right-fringe-width). */); | |
5364 | ||
5365 | DEFVAR_LISP_NOPRO ("default-fringes-outside-margins", | |
5366 | &buffer_defaults.fringes_outside_margins, | |
5367 | doc: /* Default value of `fringes-outside-margins' for buffers that don't override it. | |
5368 | This is the same as (default-value 'fringes-outside-margins). */); | |
5369 | ||
5370 | DEFVAR_LISP_NOPRO ("default-scroll-bar-width", | |
5371 | &buffer_defaults.scroll_bar_width, | |
5372 | doc: /* Default value of `scroll-bar-width' for buffers that don't override it. | |
5373 | This is the same as (default-value 'scroll-bar-width). */); | |
5374 | ||
5375 | DEFVAR_LISP_NOPRO ("default-vertical-scroll-bar", | |
5376 | &buffer_defaults.vertical_scroll_bar_type, | |
5377 | doc: /* Default value of `vertical-scroll-bar' for buffers that don't override it. | |
5378 | This is the same as (default-value 'vertical-scroll-bar). */); | |
5379 | ||
0552666b | 5380 | DEFVAR_LISP_NOPRO ("default-indicate-empty-lines", |
efc7e75f PJ |
5381 | &buffer_defaults.indicate_empty_lines, |
5382 | doc: /* Default value of `indicate-empty-lines' for buffers that don't override it. | |
018ba359 | 5383 | This is the same as (default-value 'indicate-empty-lines). */); |
177c0ea7 | 5384 | |
8e8767f8 KS |
5385 | DEFVAR_LISP_NOPRO ("default-indicate-buffer-boundaries", |
5386 | &buffer_defaults.indicate_buffer_boundaries, | |
5387 | doc: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it. | |
5388 | This is the same as (default-value 'indicate-buffer-boundaries). */); | |
5389 | ||
c6a46372 KS |
5390 | DEFVAR_LISP_NOPRO ("default-fringe-indicator-alist", |
5391 | &buffer_defaults.fringe_indicator_alist, | |
5392 | doc: /* Default value of `fringe-indicator-alist' for buffers that don't override it. | |
5393 | This is the same as (default-value 'fringe-indicator-alist'). */); | |
5394 | ||
5395 | DEFVAR_LISP_NOPRO ("default-fringe-cursor-alist", | |
5396 | &buffer_defaults.fringe_cursor_alist, | |
5397 | doc: /* Default value of `fringe-cursor-alist' for buffers that don't override it. | |
5398 | This is the same as (default-value 'fringe-cursor-alist'). */); | |
5399 | ||
0552666b | 5400 | DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively", |
efc7e75f | 5401 | &buffer_defaults.scroll_up_aggressively, |
7614d762 RS |
5402 | doc: /* Default value of `scroll-up-aggressively'. |
5403 | This value applies in buffers that don't have their own local values. | |
5404 | This variable is an alias for (default-value 'scroll-up-aggressively). */); | |
177c0ea7 | 5405 | |
0552666b | 5406 | DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively", |
efc7e75f | 5407 | &buffer_defaults.scroll_down_aggressively, |
7614d762 RS |
5408 | doc: /* Default value of `scroll-down-aggressively'. |
5409 | This value applies in buffers that don't have their own local values. | |
5410 | This variable is an alias for (default-value 'scroll-down-aggressively). */); | |
177c0ea7 | 5411 | |
045dee35 | 5412 | DEFVAR_PER_BUFFER ("header-line-format", |
018ba359 | 5413 | ¤t_buffer->header_line_format, |
7ee72033 | 5414 | Qnil, |
7614d762 RS |
5415 | doc: /* Analogous to `mode-line-format', but controls the header line. |
5416 | The header line appears, optionally, at the top of a window; | |
5417 | the mode line appears at the bottom. */); | |
177c0ea7 | 5418 | |
1ab256cb | 5419 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, |
efc7e75f PJ |
5420 | Qnil, |
5421 | doc: /* Template for displaying mode line for current buffer. | |
018ba359 PJ |
5422 | Each buffer has its own value of this variable. |
5423 | Value may be nil, a string, a symbol or a list or cons cell. | |
5424 | A value of nil means don't display a mode line. | |
5425 | For a symbol, its value is used (but it is ignored if t or nil). | |
5426 | A string appearing directly as the value of a symbol is processed verbatim | |
5427 | in that the %-constructs below are not recognized. | |
ed463255 | 5428 | Note that unless the symbol is marked as a `risky-local-variable', all |
177c0ea7 | 5429 | properties in any strings, as well as all :eval and :propertize forms |
ed463255 | 5430 | in the value of that symbol will be ignored. |
018ba359 | 5431 | For a list of the form `(:eval FORM)', FORM is evaluated and the result |
9c3eecf3 RS |
5432 | is used as a mode line element. Be careful--FORM should not load any files, |
5433 | because that can cause an infinite recursion. | |
ed463255 KS |
5434 | For a list of the form `(:propertize ELT PROPS...)', ELT is displayed |
5435 | with the specified properties PROPS applied. | |
018ba359 PJ |
5436 | For a list whose car is a symbol, the symbol's value is taken, |
5437 | and if that is non-nil, the cadr of the list is processed recursively. | |
5438 | Otherwise, the caddr of the list (if there is one) is processed. | |
5439 | For a list whose car is a string or list, each element is processed | |
5440 | recursively and the results are effectively concatenated. | |
5441 | For a list whose car is an integer, the cdr of the list is processed | |
5442 | and padded (if the number is positive) or truncated (if negative) | |
5443 | to the width specified by that number. | |
5444 | A string is printed verbatim in the mode line except for %-constructs: | |
5445 | (%-constructs are allowed when the string is the entire mode-line-format | |
5446 | or when it is found in a cons-cell or a list) | |
5447 | %b -- print buffer name. %f -- print visited file name. | |
5448 | %F -- print frame name. | |
5449 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen. | |
5450 | %& is like %*, but ignore read-only-ness. | |
5451 | % means buffer is read-only and * means it is modified. | |
5452 | For a modified read-only buffer, %* gives % and %+ gives *. | |
5453 | %s -- print process status. %l -- print the current line number. | |
5454 | %c -- print the current column number (this makes editing slower). | |
5455 | To make the column number update correctly in all cases, | |
5456 | `column-number-mode' must be non-nil. | |
77d31fb4 LK |
5457 | %i -- print the size of the buffer. |
5458 | %I -- like %i, but use k, M, G, etc., to abbreviate. | |
018ba359 PJ |
5459 | %p -- print percent of buffer above top of window, or Top, Bot or All. |
5460 | %P -- print percent of buffer above bottom of window, perhaps plus Top, | |
5461 | or print Bottom or All. | |
018ba359 | 5462 | %n -- print Narrow if appropriate. |
dafbe726 | 5463 | %t -- visited file is text or binary (if OS supports this distinction). |
018ba359 PJ |
5464 | %z -- print mnemonics of buffer, terminal, and keyboard coding systems. |
5465 | %Z -- like %z, but including the end-of-line format. | |
dafbe726 | 5466 | %e -- print error message about full memory. |
018ba359 PJ |
5467 | %[ -- print one [ for each recursive editing level. %] similar. |
5468 | %% -- print %. %- -- print infinitely many dashes. | |
5469 | Decimal digits after the % specify field width to which to pad. */); | |
5470 | ||
7ee72033 | 5471 | DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults.major_mode, |
efc7e75f | 5472 | doc: /* *Major mode for new buffers. Defaults to `fundamental-mode'. |
557ca2c1 RS |
5473 | nil here means use current buffer's major mode, provided it is not |
5474 | marked as "special". | |
5475 | ||
5476 | When a mode is used by default, `find-file' switches to it | |
5477 | before it reads the contents into the buffer and before | |
5478 | it finishes setting up the buffer. Thus, the mode and | |
5479 | its hooks should not expect certain variables such as | |
5480 | `buffer-read-only' and `buffer-file-coding-system' to be set up. */); | |
1ab256cb RM |
5481 | |
5482 | DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer->major_mode, | |
7ee72033 | 5483 | make_number (Lisp_Symbol), |
efc7e75f | 5484 | doc: /* Symbol for current buffer's major mode. */); |
1ab256cb RM |
5485 | |
5486 | DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer->mode_name, | |
c01d0677 | 5487 | Qnil, |
efc7e75f | 5488 | doc: /* Pretty name of current buffer's major mode (a string). */); |
1ab256cb | 5489 | |
7ee72033 | 5490 | DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer->abbrev_mode, Qnil, |
efc7e75f | 5491 | doc: /* Non-nil turns on automatic expansion of abbrevs as they are inserted. */); |
1ab256cb RM |
5492 | |
5493 | DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer->case_fold_search, | |
7ee72033 | 5494 | Qnil, |
efc7e75f | 5495 | doc: /* *Non-nil if searches and matches should ignore case. */); |
1ab256cb RM |
5496 | |
5497 | DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer->fill_column, | |
7ee72033 | 5498 | make_number (Lisp_Int), |
1ac5826d | 5499 | doc: /* *Column beyond which automatic line-wrapping should happen. |
f1ccb329 | 5500 | Interactively, you can set the buffer local value using \\[set-fill-column]. */); |
1ab256cb RM |
5501 | |
5502 | DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer->left_margin, | |
7ee72033 | 5503 | make_number (Lisp_Int), |
efc7e75f | 5504 | doc: /* *Column for the default indent-line-function to indent to. |
018ba359 | 5505 | Linefeed indents to this column in Fundamental mode. */); |
1ab256cb RM |
5506 | |
5507 | DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer->tab_width, | |
7ee72033 | 5508 | make_number (Lisp_Int), |
efc7e75f | 5509 | doc: /* *Distance between tab stops (for display of tab characters), in columns. */); |
1ab256cb | 5510 | |
7ee72033 | 5511 | DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer->ctl_arrow, Qnil, |
efc7e75f | 5512 | doc: /* *Non-nil means display control chars with uparrow. |
018ba359 PJ |
5513 | A value of nil means use backslash and octal digits. |
5514 | This variable does not apply to characters whose display is specified | |
5515 | in the current display table (if there is one). */); | |
1ab256cb | 5516 | |
3b06f880 | 5517 | DEFVAR_PER_BUFFER ("enable-multibyte-characters", |
1bf08baf | 5518 | ¤t_buffer->enable_multibyte_characters, |
a9b9a780 | 5519 | Qnil, |
efc7e75f | 5520 | doc: /* Non-nil means the buffer contents are regarded as multi-byte characters. |
018ba359 PJ |
5521 | Otherwise they are regarded as unibyte. This affects the display, |
5522 | file I/O and the behavior of various editing commands. | |
5523 | ||
5524 | This variable is buffer-local but you cannot set it directly; | |
5525 | use the function `set-buffer-multibyte' to change a buffer's representation. | |
5526 | Changing its default value with `setq-default' is supported. | |
5527 | See also variable `default-enable-multibyte-characters' and Info node | |
5528 | `(elisp)Text Representations'. */); | |
a9b9a780 | 5529 | XSYMBOL (intern ("enable-multibyte-characters"))->constant = 1; |
3b06f880 | 5530 | |
c71b5d9b | 5531 | DEFVAR_PER_BUFFER ("buffer-file-coding-system", |
7ee72033 | 5532 | ¤t_buffer->buffer_file_coding_system, Qnil, |
efc7e75f | 5533 | doc: /* Coding system to be used for encoding the buffer contents on saving. |
018ba359 PJ |
5534 | This variable applies to saving the buffer, and also to `write-region' |
5535 | and other functions that use `write-region'. | |
5536 | It does not apply to sending output to subprocesses, however. | |
5537 | ||
5538 | If this is nil, the buffer is saved without any code conversion | |
5539 | unless some coding system is specified in `file-coding-system-alist' | |
5540 | for the buffer file. | |
5541 | ||
31a6cb06 EZ |
5542 | If the text to be saved cannot be encoded as specified by this variable, |
5543 | an alternative encoding is selected by `select-safe-coding-system', which see. | |
5544 | ||
018ba359 PJ |
5545 | The variable `coding-system-for-write', if non-nil, overrides this variable. |
5546 | ||
5547 | This variable is never applied to a way of decoding a file while reading it. */); | |
c71b5d9b | 5548 | |
3b06f880 | 5549 | DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer->direction_reversed, |
7ee72033 | 5550 | Qnil, |
efc7e75f | 5551 | doc: /* *Non-nil means lines in the buffer are displayed right to left. */); |
3b06f880 | 5552 | |
7ee72033 | 5553 | DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer->truncate_lines, Qnil, |
7614d762 RS |
5554 | doc: /* *Non-nil means do not display continuation lines. |
5555 | Instead, give each line of text just one screen line. | |
018ba359 PJ |
5556 | |
5557 | Note that this is overridden by the variable | |
5558 | `truncate-partial-width-windows' if that variable is non-nil | |
5559 | and this buffer is not full-frame width. */); | |
1ab256cb | 5560 | |
f7975d07 | 5561 | #ifdef DOS_NT |
54ad07d3 | 5562 | DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer->buffer_file_type, |
7ee72033 | 5563 | Qnil, |
efc7e75f | 5564 | doc: /* Non-nil if the visited file is a binary file. |
018ba359 PJ |
5565 | This variable is meaningful on MS-DOG and Windows NT. |
5566 | On those systems, it is automatically local in every buffer. | |
5567 | On other systems, this variable is normally always nil. */); | |
54ad07d3 RS |
5568 | #endif |
5569 | ||
1ab256cb | 5570 | DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer->directory, |
7ee72033 | 5571 | make_number (Lisp_String), |
efc7e75f | 5572 | doc: /* Name of default directory of current buffer. Should end with slash. |
018ba359 | 5573 | To interactively change the default directory, use command `cd'. */); |
1ab256cb RM |
5574 | |
5575 | DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer->auto_fill_function, | |
7ee72033 | 5576 | Qnil, |
efc7e75f | 5577 | doc: /* Function called (if non-nil) to perform auto-fill. |
018ba359 PJ |
5578 | It is called after self-inserting any character specified in |
5579 | the `auto-fill-chars' table. | |
5580 | NOTE: This variable is not a hook; | |
5581 | its value may not be a list of functions. */); | |
1ab256cb RM |
5582 | |
5583 | DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer->filename, | |
7ee72033 | 5584 | make_number (Lisp_String), |
efc7e75f | 5585 | doc: /* Name of file visited in current buffer, or nil if not visiting a file. */); |
1ab256cb | 5586 | |
f6ed2e84 | 5587 | DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer->file_truename, |
7ee72033 | 5588 | make_number (Lisp_String), |
efc7e75f | 5589 | doc: /* Abbreviated truename of file visited in current buffer, or nil if none. |
018ba359 PJ |
5590 | The truename of a file is calculated by `file-truename' |
5591 | and then abbreviated with `abbreviate-file-name'. */); | |
f6ed2e84 | 5592 | |
1ab256cb | 5593 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", |
3f5fcd47 | 5594 | ¤t_buffer->auto_save_file_name, |
7ee72033 | 5595 | make_number (Lisp_String), |
7614d762 RS |
5596 | doc: /* Name of file for auto-saving current buffer. |
5597 | If it is nil, that means don't auto-save this buffer. */); | |
1ab256cb | 5598 | |
7ee72033 | 5599 | DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer->read_only, Qnil, |
efc7e75f | 5600 | doc: /* Non-nil if this buffer is read-only. */); |
1ab256cb | 5601 | |
7ee72033 | 5602 | DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer->backed_up, Qnil, |
efc7e75f | 5603 | doc: /* Non-nil if this buffer's file has been backed up. |
018ba359 | 5604 | Backing up is done before the first time the file is saved. */); |
1ab256cb RM |
5605 | |
5606 | DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer->save_length, | |
7ee72033 | 5607 | make_number (Lisp_Int), |
efc7e75f | 5608 | doc: /* Length of current buffer when last read in, saved or auto-saved. |
018ba359 | 5609 | 0 initially. */); |
1ab256cb RM |
5610 | |
5611 | DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer->selective_display, | |
7ee72033 | 5612 | Qnil, |
7614d762 RS |
5613 | doc: /* Non-nil enables selective display. |
5614 | An Integer N as value means display only lines | |
5615 | that start with less than n columns of space. | |
5616 | A value of t means that the character ^M makes itself and | |
5617 | all the rest of the line invisible; also, when saving the buffer | |
5618 | in a file, save the ^M as a newline. */); | |
1ab256cb RM |
5619 | |
5620 | #ifndef old | |
5621 | DEFVAR_PER_BUFFER ("selective-display-ellipses", | |
5622 | ¤t_buffer->selective_display_ellipses, | |
7ee72033 | 5623 | Qnil, |
3f676284 | 5624 | doc: /* Non-nil means display ... on previous line when a line is invisible. */); |
1ab256cb RM |
5625 | #endif |
5626 | ||
7ee72033 | 5627 | DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer->overwrite_mode, Qnil, |
efc7e75f | 5628 | doc: /* Non-nil if self-insertion should replace existing text. |
018ba359 PJ |
5629 | The value should be one of `overwrite-mode-textual', |
5630 | `overwrite-mode-binary', or nil. | |
5631 | If it is `overwrite-mode-textual', self-insertion still | |
5632 | inserts at the end of a line, and inserts when point is before a tab, | |
5633 | until the tab is filled in. | |
5634 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */); | |
5635 | ||
54939090 | 5636 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, |
7ee72033 | 5637 | Qnil, |
efc7e75f | 5638 | doc: /* Display table that controls display of the contents of current buffer. |
018ba359 PJ |
5639 | |
5640 | If this variable is nil, the value of `standard-display-table' is used. | |
5641 | Each window can have its own, overriding display table, see | |
5642 | `set-window-display-table' and `window-display-table'. | |
5643 | ||
5644 | The display table is a char-table created with `make-display-table'. | |
5645 | A char-table is an array indexed by character codes. Normal array | |
5646 | primitives `aref' and `aset' can be used to access elements of a char-table. | |
5647 | ||
5648 | Each of the char-table elements control how to display the corresponding | |
5649 | text character: the element at index C in the table says how to display | |
5650 | the character whose code is C. Each element should be a vector of | |
5651 | characters or nil. nil means display the character in the default fashion; | |
5652 | otherwise, the characters from the vector are delivered to the screen | |
5653 | instead of the original character. | |
5654 | ||
5655 | For example, (aset buffer-display-table ?X ?Y) will cause Emacs to display | |
5656 | a capital Y instead of each X character. | |
5657 | ||
5658 | In addition, a char-table has six extra slots to control the display of: | |
5659 | ||
5660 | the end of a truncated screen line (extra-slot 0, a single character); | |
5661 | the end of a continued line (extra-slot 1, a single character); | |
5662 | the escape character used to display character codes in octal | |
5663 | (extra-slot 2, a single character); | |
5664 | the character used as an arrow for control characters (extra-slot 3, | |
5665 | a single character); | |
5666 | the decoration indicating the presence of invisible lines (extra-slot 4, | |
5667 | a vector of characters); | |
5668 | the character used to draw the border between side-by-side windows | |
5669 | (extra-slot 5, a single character). | |
5670 | ||
5671 | See also the functions `display-table-slot' and `set-display-table-slot'. */); | |
1ab256cb | 5672 | |
2ad8731a | 5673 | DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer->left_margin_cols, |
7ee72033 | 5674 | Qnil, |
efc7e75f | 5675 | doc: /* *Width of left marginal area for display of a buffer. |
018ba359 | 5676 | A value of nil means no marginal area. */); |
177c0ea7 | 5677 | |
2ad8731a | 5678 | DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer->right_margin_cols, |
7ee72033 | 5679 | Qnil, |
efc7e75f | 5680 | doc: /* *Width of right marginal area for display of a buffer. |
018ba359 | 5681 | A value of nil means no marginal area. */); |
177c0ea7 | 5682 | |
2ad8731a KS |
5683 | DEFVAR_PER_BUFFER ("left-fringe-width", ¤t_buffer->left_fringe_width, |
5684 | Qnil, | |
5685 | doc: /* *Width of this buffer's left fringe (in pixels). | |
5686 | A value of 0 means no left fringe is shown in this buffer's window. | |
5687 | A value of nil means to use the left fringe width from the window's frame. */); | |
5688 | ||
5689 | DEFVAR_PER_BUFFER ("right-fringe-width", ¤t_buffer->right_fringe_width, | |
5690 | Qnil, | |
5691 | doc: /* *Width of this buffer's right fringe (in pixels). | |
5692 | A value of 0 means no right fringe is shown in this buffer's window. | |
5693 | A value of nil means to use the right fringe width from the window's frame. */); | |
5694 | ||
5695 | DEFVAR_PER_BUFFER ("fringes-outside-margins", ¤t_buffer->fringes_outside_margins, | |
5696 | Qnil, | |
5697 | doc: /* *Non-nil means to display fringes outside display margins. | |
5698 | A value of nil means to display fringes between margins and buffer text. */); | |
5699 | ||
5700 | DEFVAR_PER_BUFFER ("scroll-bar-width", ¤t_buffer->scroll_bar_width, | |
5701 | Qnil, | |
5702 | doc: /* *Width of this buffer's scroll bars in pixels. | |
5703 | A value of nil means to use the scroll bar width from the window's frame. */); | |
5704 | ||
5705 | DEFVAR_PER_BUFFER ("vertical-scroll-bar", ¤t_buffer->vertical_scroll_bar_type, | |
5706 | Qnil, | |
5707 | doc: /* *Position of this buffer's vertical scroll bar. | |
7c6b2007 | 5708 | The value takes effect whenever you tell a window to display this buffer; |
188577ce | 5709 | for instance, with `set-window-buffer' or when `display-buffer' displays it. |
7c6b2007 | 5710 | |
fc2c8887 RS |
5711 | A value of `left' or `right' means put the vertical scroll bar at that side |
5712 | of the window; a value of nil means don't show any vertical scroll bars. | |
5713 | A value of t (the default) means do whatever the window's frame specifies. */); | |
2ad8731a | 5714 | |
0552666b | 5715 | DEFVAR_PER_BUFFER ("indicate-empty-lines", |
7ee72033 | 5716 | ¤t_buffer->indicate_empty_lines, Qnil, |
efc7e75f | 5717 | doc: /* *Visually indicate empty lines after the buffer end. |
018ba359 PJ |
5718 | If non-nil, a bitmap is displayed in the left fringe of a window on |
5719 | window-systems. */); | |
177c0ea7 | 5720 | |
8e8767f8 KS |
5721 | DEFVAR_PER_BUFFER ("indicate-buffer-boundaries", |
5722 | ¤t_buffer->indicate_buffer_boundaries, Qnil, | |
5723 | doc: /* *Visually indicate buffer boundaries and scrolling. | |
ccbc4331 KS |
5724 | If non-nil, the first and last line of the buffer are marked in the fringe |
5725 | of a window on window-systems with angle bitmaps, or if the window can be | |
5726 | scrolled, the top and bottom line of the window are marked with up and down | |
5727 | arrow bitmaps. | |
b2229037 KS |
5728 | |
5729 | If value is a symbol `left' or `right', both angle and arrow bitmaps | |
79e3497d | 5730 | are displayed in the left or right fringe, resp. Any other value |
845a78b4 | 5731 | that doesn't look like an alist means display the angle bitmaps in |
79e3497d | 5732 | the left fringe but no arrows. |
b2229037 | 5733 | |
79e3497d RS |
5734 | You can exercise more precise control by using an alist as the |
5735 | value. Each alist element (INDICATOR . POSITION) specifies | |
5736 | where to show one of the indicators. INDICATOR is one of `top', | |
b2229037 KS |
5737 | `bottom', `up', `down', or t, which specifies the default position, |
5738 | and POSITION is one of `left', `right', or nil, meaning do not show | |
5739 | this indicator. | |
5740 | ||
5741 | For example, ((top . left) (t . right)) places the top angle bitmap in | |
5742 | left fringe, the bottom angle bitmap in right fringe, and both arrow | |
ccbc4331 | 5743 | bitmaps in right fringe. To show just the angle bitmaps in the left |
b2229037 | 5744 | fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */); |
8e8767f8 | 5745 | |
c6a46372 KS |
5746 | DEFVAR_PER_BUFFER ("fringe-indicator-alist", |
5747 | ¤t_buffer->fringe_indicator_alist, Qnil, | |
5748 | doc: /* *Mapping from logical to physical fringe indicator bitmaps. | |
5749 | The value is an alist where each element (INDICATOR . BITMAPS) | |
5750 | specifies the fringe bitmaps used to display a specific logical | |
5751 | fringe indicator. | |
5752 | ||
5753 | INDICATOR specifies the logical indicator type which is one of the | |
5754 | following symbols: `truncation' , `continuation', `overlay-arrow', | |
5755 | `top', `bottom', `up', `down', `one-line', `empty-line', or `unknown'. | |
5756 | ||
5757 | BITMAPS is list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies | |
5758 | the actual bitmap shown in the left or right fringe for the logical | |
5759 | indicator. LEFT and RIGHT are the bitmaps shown in the left and/or | |
5760 | right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps | |
5761 | are used only for the `bottom' and `one-line' indicators when the last | |
63af6055 | 5762 | \(only) line in has no final newline. BITMAPS may also be a single |
c6a46372 KS |
5763 | symbol which is used in both left and right fringes. */); |
5764 | ||
5765 | DEFVAR_PER_BUFFER ("fringe-cursor-alist", | |
5766 | ¤t_buffer->fringe_cursor_alist, Qnil, | |
5767 | doc: /* *Mapping from logical to physical fringe cursor bitmaps. | |
5768 | The value is an alist where each element (CURSOR . BITMAP) | |
5769 | specifies the fringe bitmaps used to display a specific logical | |
5770 | cursor type in the fringe. | |
5771 | ||
5772 | CURSOR specifies the logical cursor type which is one of the following | |
5773 | symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last | |
5774 | one is used to show a hollow cursor on narrow lines display lines | |
5775 | where the normal hollow cursor will not fit. | |
5776 | ||
5777 | BITMAP is the corresponding fringe bitmap shown for the logical | |
5778 | cursor type. */); | |
5779 | ||
0552666b | 5780 | DEFVAR_PER_BUFFER ("scroll-up-aggressively", |
7ee72033 | 5781 | ¤t_buffer->scroll_up_aggressively, Qnil, |
4e0692c1 RS |
5782 | doc: /* How far to scroll windows upward. |
5783 | If you move point off the bottom, the window scrolls automatically. | |
5784 | This variable controls how far it scrolls. nil, the default, | |
5785 | means scroll to center point. A fraction means scroll to put point | |
5786 | that fraction of the window's height from the bottom of the window. | |
5787 | When the value is 0.0, point goes at the bottom line, which in the simple | |
5788 | case that you moved off with C-f means scrolling just one line. 1.0 means | |
5789 | point goes at the top, so that in that simple case, the window | |
e5f95d5c | 5790 | scrolls by a full window height. Meaningful values are |
175e9712 | 5791 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 5792 | |
0552666b | 5793 | DEFVAR_PER_BUFFER ("scroll-down-aggressively", |
7ee72033 | 5794 | ¤t_buffer->scroll_down_aggressively, Qnil, |
4e0692c1 RS |
5795 | doc: /* How far to scroll windows downward. |
5796 | If you move point off the top, the window scrolls automatically. | |
5797 | This variable controls how far it scrolls. nil, the default, | |
5798 | means scroll to center point. A fraction means scroll to put point | |
5799 | that fraction of the window's height from the top of the window. | |
5800 | When the value is 0.0, point goes at the top line, which in the simple | |
5801 | case that you moved off with C-b means scrolling just one line. 1.0 means | |
5802 | point goes at the bottom, so that in that simple case, the window | |
e5f95d5c | 5803 | scrolls by a full window height. Meaningful values are |
175e9712 | 5804 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 5805 | |
1ab256cb RM |
5806 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
5807 | "Don't ask."); | |
5808 | */ | |
1ab256cb | 5809 | |
7ee72033 MB |
5810 | DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions, |
5811 | doc: /* List of functions to call before each text change. | |
018ba359 PJ |
5812 | Two arguments are passed to each function: the positions of |
5813 | the beginning and end of the range of old text to be changed. | |
5814 | \(For an insertion, the beginning and end are at the same place.) | |
5815 | No information is given about the length of the text after the change. | |
5816 | ||
5817 | Buffer changes made while executing the `before-change-functions' | |
5818 | don't call any before-change or after-change functions. | |
5819 | That's because these variables are temporarily set to nil. | |
5820 | As a result, a hook function cannot straightforwardly alter the value of | |
5821 | these variables. See the Emacs Lisp manual for a way of | |
5822 | accomplishing an equivalent result by using other variables. | |
5823 | ||
5824 | If an unhandled error happens in running these functions, | |
5825 | the variable's value remains nil. That prevents the error | |
5826 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
5827 | Vbefore_change_functions = Qnil; |
5828 | ||
7ee72033 | 5829 | DEFVAR_LISP ("after-change-functions", &Vafter_change_functions, |
eacdfade | 5830 | doc: /* List of functions to call after each text change. |
018ba359 PJ |
5831 | Three arguments are passed to each function: the positions of |
5832 | the beginning and end of the range of changed text, | |
5833 | and the length in bytes of the pre-change text replaced by that range. | |
5834 | \(For an insertion, the pre-change length is zero; | |
5835 | for a deletion, that length is the number of bytes deleted, | |
5836 | and the post-change beginning and end are at the same place.) | |
5837 | ||
5838 | Buffer changes made while executing the `after-change-functions' | |
5839 | don't call any before-change or after-change functions. | |
5840 | That's because these variables are temporarily set to nil. | |
5841 | As a result, a hook function cannot straightforwardly alter the value of | |
5842 | these variables. See the Emacs Lisp manual for a way of | |
5843 | accomplishing an equivalent result by using other variables. | |
5844 | ||
5845 | If an unhandled error happens in running these functions, | |
5846 | the variable's value remains nil. That prevents the error | |
5847 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
5848 | Vafter_change_functions = Qnil; |
5849 | ||
7ee72033 | 5850 | DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook, |
efc7e75f | 5851 | doc: /* A list of functions to call before changing a buffer which is unmodified. |
018ba359 | 5852 | The functions are run using the `run-hooks' function. */); |
dbc4e1c1 | 5853 | Vfirst_change_hook = Qnil; |
1ab256cb | 5854 | |
7ee72033 MB |
5855 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, |
5856 | doc: /* List of undo entries in current buffer. | |
018ba359 PJ |
5857 | Recent changes come first; older changes follow newer. |
5858 | ||
5859 | An entry (BEG . END) represents an insertion which begins at | |
5860 | position BEG and ends at position END. | |
5861 | ||
5862 | An entry (TEXT . POSITION) represents the deletion of the string TEXT | |
5863 | from (abs POSITION). If POSITION is positive, point was at the front | |
5864 | of the text being deleted; if negative, point was at the end. | |
5865 | ||
5866 | An entry (t HIGH . LOW) indicates that the buffer previously had | |
5867 | \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions | |
5868 | of the visited file's modification time, as of that time. If the | |
5869 | modification time of the most recent save is different, this entry is | |
5870 | obsolete. | |
5871 | ||
5872 | An entry (nil PROPERTY VALUE BEG . END) indicates that a text property | |
5873 | was modified between BEG and END. PROPERTY is the property name, | |
5874 | and VALUE is the old value. | |
5875 | ||
7405f386 KS |
5876 | An entry (apply FUN-NAME . ARGS) means undo the change with |
5877 | \(apply FUN-NAME ARGS). | |
5878 | ||
5879 | An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo | |
5880 | in the active region. BEG and END is the range affected by this entry | |
5881 | and DELTA is the number of bytes added or deleted in that range by | |
5882 | this change. | |
c6c7dc03 | 5883 | |
018ba359 PJ |
5884 | An entry (MARKER . DISTANCE) indicates that the marker MARKER |
5885 | was adjusted in position by the offset DISTANCE (an integer). | |
5886 | ||
5887 | An entry of the form POSITION indicates that point was at the buffer | |
5888 | location given by the integer. Undoing an entry of this form places | |
5889 | point at POSITION. | |
5890 | ||
5891 | nil marks undo boundaries. The undo command treats the changes | |
5892 | between two undo boundaries as a single step to be undone. | |
5893 | ||
5894 | If the value of the variable is t, undo information is not recorded. */); | |
5895 | ||
7ee72033 MB |
5896 | DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer->mark_active, Qnil, |
5897 | doc: /* Non-nil means the mark and region are currently active in this buffer. */); | |
018ba359 | 5898 | |
7ee72033 MB |
5899 | DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer->cache_long_line_scans, Qnil, |
5900 | doc: /* Non-nil means that Emacs should use caches to handle long lines more quickly. | |
018ba359 PJ |
5901 | |
5902 | Normally, the line-motion functions work by scanning the buffer for | |
5629f29b DK |
5903 | newlines. Columnar operations (like `move-to-column' and |
5904 | `compute-motion') also work by scanning the buffer, summing character | |
018ba359 PJ |
5905 | widths as they go. This works well for ordinary text, but if the |
5906 | buffer's lines are very long (say, more than 500 characters), these | |
5907 | motion functions will take longer to execute. Emacs may also take | |
5908 | longer to update the display. | |
5909 | ||
5629f29b | 5910 | If `cache-long-line-scans' is non-nil, these motion functions cache the |
018ba359 PJ |
5911 | results of their scans, and consult the cache to avoid rescanning |
5912 | regions of the buffer until the text is modified. The caches are most | |
5913 | beneficial when they prevent the most searching---that is, when the | |
5914 | buffer contains long lines and large regions of characters with the | |
5915 | same, fixed screen width. | |
5916 | ||
5629f29b | 5917 | When `cache-long-line-scans' is non-nil, processing short lines will |
018ba359 PJ |
5918 | become slightly slower (because of the overhead of consulting the |
5919 | cache), and the caches will use memory roughly proportional to the | |
5920 | number of newlines and characters whose screen width varies. | |
5921 | ||
5922 | The caches require no explicit maintenance; their accuracy is | |
5923 | maintained internally by the Emacs primitives. Enabling or disabling | |
5924 | the cache should not affect the behavior of any of the motion | |
5925 | functions; it should only affect their performance. */); | |
5926 | ||
7ee72033 MB |
5927 | DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer->point_before_scroll, Qnil, |
5928 | doc: /* Value of point before the last series of scroll operations, or nil. */); | |
018ba359 | 5929 | |
7ee72033 MB |
5930 | DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer->file_format, Qnil, |
5931 | doc: /* List of formats to use when saving this buffer. | |
018ba359 | 5932 | Formats are defined by `format-alist'. This variable is |
a9b9a780 | 5933 | set when a file is visited. */); |
be9aafdd | 5934 | |
71ed49fa LT |
5935 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-format", |
5936 | ¤t_buffer->auto_save_file_format, Qnil, | |
5937 | doc: /* *Format in which to write auto-save files. | |
5938 | Should be a list of symbols naming formats that are defined in `format-alist'. | |
5939 | If it is t, which is the default, auto-save files are written in the | |
5940 | same format as a regular save would use. */); | |
5941 | ||
3cb719bd | 5942 | DEFVAR_PER_BUFFER ("buffer-invisibility-spec", |
7ee72033 MB |
5943 | ¤t_buffer->invisibility_spec, Qnil, |
5944 | doc: /* Invisibility spec of this buffer. | |
018ba359 PJ |
5945 | The default is t, which means that text is invisible |
5946 | if it has a non-nil `invisible' property. | |
5947 | If the value is a list, a text character is invisible if its `invisible' | |
5948 | property is an element in that list. | |
5949 | If an element is a cons cell of the form (PROP . ELLIPSIS), | |
5950 | then characters with property value PROP are invisible, | |
5951 | and they have an ellipsis as well if ELLIPSIS is non-nil. */); | |
3cb719bd | 5952 | |
7962a441 | 5953 | DEFVAR_PER_BUFFER ("buffer-display-count", |
7ee72033 MB |
5954 | ¤t_buffer->display_count, Qnil, |
5955 | doc: /* A number incremented each time this buffer is displayed in a window. | |
018ba359 | 5956 | The function `set-window-buffer' increments it. */); |
3fd364db RS |
5957 | |
5958 | DEFVAR_PER_BUFFER ("buffer-display-time", | |
7ee72033 MB |
5959 | ¤t_buffer->display_time, Qnil, |
5960 | doc: /* Time stamp updated each time this buffer is displayed in a window. | |
018ba359 PJ |
5961 | The function `set-window-buffer' updates this variable |
5962 | to the value obtained by calling `current-time'. | |
5963 | If the buffer has never been shown in a window, the value is nil. */); | |
5964 | ||
7ee72033 MB |
5965 | DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode, |
5966 | doc: /* *Non-nil means deactivate the mark when the buffer contents change. | |
018ba359 PJ |
5967 | Non-nil also enables highlighting of the region whenever the mark is active. |
5968 | The variable `highlight-nonselected-windows' controls whether to highlight | |
5a39b770 RS |
5969 | all windows or just the selected window. |
5970 | ||
5971 | If the value is `lambda', that enables Transient Mark mode temporarily | |
5972 | until the next buffer modification. If a command sets the value to `only', | |
b3264fd2 RS |
5973 | that enables Transient Mark mode for the following command only. |
5974 | During that following command, the value of `transient-mark-mode' | |
5975 | is `identity'. If it is still `identity' at the end of that command, | |
5976 | it changes to nil. */); | |
c48f61ef RS |
5977 | Vtransient_mark_mode = Qnil; |
5978 | ||
7ee72033 MB |
5979 | DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only, |
5980 | doc: /* *Non-nil means disregard read-only status of buffers or characters. | |
018ba359 PJ |
5981 | If the value is t, disregard `buffer-read-only' and all `read-only' |
5982 | text properties. If the value is a list, disregard `buffer-read-only' | |
5983 | and disregard a `read-only' text property if the property value | |
5984 | is a member of the list. */); | |
a96b68f1 RS |
5985 | Vinhibit_read_only = Qnil; |
5986 | ||
7ee72033 | 5987 | DEFVAR_PER_BUFFER ("cursor-type", ¤t_buffer->cursor_type, Qnil, |
cd8d5236 | 5988 | doc: /* Cursor to use when this buffer is in the selected window. |
018ba359 PJ |
5989 | Values are interpreted as follows: |
5990 | ||
b8dc613f JB |
5991 | t use the cursor specified for the frame |
5992 | nil don't display a cursor | |
5993 | box display a filled box cursor | |
5994 | hollow display a hollow box cursor | |
5995 | bar display a vertical bar cursor with default width | |
5996 | (bar . WIDTH) display a vertical bar cursor with width WIDTH | |
5997 | hbar display a horizontal bar cursor with default height | |
b4234f4c | 5998 | (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT |
b8dc613f | 5999 | ANYTHING ELSE display a hollow box cursor |
cd8d5236 RS |
6000 | |
6001 | When the buffer is displayed in a nonselected window, | |
6002 | this variable has no effect; the cursor appears as a hollow box. */); | |
bb2ec976 | 6003 | |
a3bbced0 | 6004 | DEFVAR_PER_BUFFER ("line-spacing", |
7ee72033 MB |
6005 | ¤t_buffer->extra_line_spacing, Qnil, |
6006 | doc: /* Additional space to put between lines when displaying a buffer. | |
60ebfdf3 KS |
6007 | The space is measured in pixels, and put below lines on window systems. |
6008 | If value is a floating point number, it specifies the spacing relative | |
63af6055 | 6009 | to the default frame line height. nil means add no extra space. */); |
a3bbced0 | 6010 | |
0124c5bd | 6011 | DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows", |
187ccf49 | 6012 | ¤t_buffer->cursor_in_non_selected_windows, Qnil, |
0124c5bd RS |
6013 | doc: /* *Cursor type to display in non-selected windows. |
6014 | t means to use hollow box cursor. See `cursor-type' for other values. */); | |
6015 | ||
7ee72033 | 6016 | DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions, |
efc7e75f | 6017 | doc: /* List of functions called with no args to query before killing a buffer. */); |
dcdffbf6 RS |
6018 | Vkill_buffer_query_functions = Qnil; |
6019 | ||
43ed3b8d CY |
6020 | DEFVAR_LISP ("change-major-mode-hook", &Vchange_major_mode_hook, |
6021 | doc: /* Normal hook run before changing the major mode of a buffer. | |
6022 | The function `kill-all-local-variables' runs this before doing anything else. */); | |
6023 | Vchange_major_mode_hook = Qnil; | |
6024 | Qchange_major_mode_hook = intern ("change-major-mode-hook"); | |
6025 | staticpro (&Qchange_major_mode_hook); | |
6026 | ||
0dc88e60 | 6027 | defsubr (&Sbuffer_live_p); |
1ab256cb RM |
6028 | defsubr (&Sbuffer_list); |
6029 | defsubr (&Sget_buffer); | |
6030 | defsubr (&Sget_file_buffer); | |
6031 | defsubr (&Sget_buffer_create); | |
336cd056 | 6032 | defsubr (&Smake_indirect_buffer); |
01050cb5 | 6033 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb RM |
6034 | defsubr (&Sbuffer_name); |
6035 | /*defsubr (&Sbuffer_number);*/ | |
6036 | defsubr (&Sbuffer_file_name); | |
336cd056 | 6037 | defsubr (&Sbuffer_base_buffer); |
79aa712d | 6038 | defsubr (&Sbuffer_local_value); |
1ab256cb RM |
6039 | defsubr (&Sbuffer_local_variables); |
6040 | defsubr (&Sbuffer_modified_p); | |
6041 | defsubr (&Sset_buffer_modified_p); | |
6042 | defsubr (&Sbuffer_modified_tick); | |
6043 | defsubr (&Srename_buffer); | |
6044 | defsubr (&Sother_buffer); | |
1ab256cb RM |
6045 | defsubr (&Sbuffer_enable_undo); |
6046 | defsubr (&Skill_buffer); | |
a9ee7a59 | 6047 | defsubr (&Sset_buffer_major_mode); |
1ab256cb RM |
6048 | defsubr (&Sswitch_to_buffer); |
6049 | defsubr (&Spop_to_buffer); | |
6050 | defsubr (&Scurrent_buffer); | |
6051 | defsubr (&Sset_buffer); | |
6052 | defsubr (&Sbarf_if_buffer_read_only); | |
6053 | defsubr (&Sbury_buffer); | |
3ac81adb RS |
6054 | defsubr (&Serase_buffer); |
6055 | defsubr (&Sset_buffer_multibyte); | |
1ab256cb | 6056 | defsubr (&Skill_all_local_variables); |
2eec3b4e | 6057 | |
52f8ec73 | 6058 | defsubr (&Soverlayp); |
2eec3b4e RS |
6059 | defsubr (&Smake_overlay); |
6060 | defsubr (&Sdelete_overlay); | |
6061 | defsubr (&Smove_overlay); | |
8ebafa8d JB |
6062 | defsubr (&Soverlay_start); |
6063 | defsubr (&Soverlay_end); | |
6064 | defsubr (&Soverlay_buffer); | |
6065 | defsubr (&Soverlay_properties); | |
2eec3b4e | 6066 | defsubr (&Soverlays_at); |
74514898 | 6067 | defsubr (&Soverlays_in); |
2eec3b4e | 6068 | defsubr (&Snext_overlay_change); |
239c932b | 6069 | defsubr (&Sprevious_overlay_change); |
2eec3b4e RS |
6070 | defsubr (&Soverlay_recenter); |
6071 | defsubr (&Soverlay_lists); | |
6072 | defsubr (&Soverlay_get); | |
6073 | defsubr (&Soverlay_put); | |
a8c21b48 | 6074 | defsubr (&Srestore_buffer_modified_p); |
1ab256cb RM |
6075 | } |
6076 | ||
dfcf069d | 6077 | void |
1ab256cb RM |
6078 | keys_of_buffer () |
6079 | { | |
6080 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
6081 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
4158c17d RM |
6082 | |
6083 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
6084 | initialized when that function gets called. */ | |
6085 | Fput (intern ("erase-buffer"), Qdisabled, Qt); | |
1ab256cb | 6086 | } |
ab5796a9 MB |
6087 | |
6088 | /* arch-tag: e48569bf-69a9-4b65-a23b-8e68769436e1 | |
6089 | (do not change this comment) */ |