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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, | |
4e6835db | 4 | 2003, 2004, 2005, 2006, 2007 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" | |
8f348ed5 | 45 | #include "character.h" |
28e969dd | 46 | #include "region-cache.h" |
1ab256cb | 47 | #include "indent.h" |
d014bf88 | 48 | #include "blockinput.h" |
2538fae4 | 49 | #include "keyboard.h" |
e35f6ff7 | 50 | #include "keymap.h" |
08460cd4 | 51 | #include "frame.h" |
1ab256cb RM |
52 | |
53 | struct buffer *current_buffer; /* the current buffer */ | |
54 | ||
55 | /* First buffer in chain of all buffers (in reverse order of creation). | |
56 | Threaded through ->next. */ | |
57 | ||
58 | struct buffer *all_buffers; | |
59 | ||
60 | /* This structure holds the default values of the buffer-local variables | |
61 | defined with DEFVAR_PER_BUFFER, that have special slots in each buffer. | |
62 | The default value occupies the same slot in this structure | |
63 | as an individual buffer's value occupies in that buffer. | |
64 | Setting the default value also goes through the alist of buffers | |
65 | and stores into each buffer that does not say it has a local value. */ | |
66 | ||
6b61353c | 67 | DECL_ALIGN (struct buffer, buffer_defaults); |
1ab256cb RM |
68 | |
69 | /* A Lisp_Object pointer to the above, used for staticpro */ | |
70 | ||
71 | static Lisp_Object Vbuffer_defaults; | |
72 | ||
73 | /* This structure marks which slots in a buffer have corresponding | |
74 | default values in buffer_defaults. | |
75 | Each such slot has a nonzero value in this structure. | |
76 | The value has only one nonzero bit. | |
77 | ||
78 | When a buffer has its own local value for a slot, | |
7c02e886 GM |
79 | the entry for that slot (found in the same slot in this structure) |
80 | is turned on in the buffer's local_flags array. | |
1ab256cb RM |
81 | |
82 | If a slot in this structure is -1, then even though there may | |
83 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
84 | and the corresponding slot in buffer_defaults is not used. | |
85 | ||
86 | If a slot is -2, then there is no DEFVAR_PER_BUFFER for it, | |
87 | but there is a default value which is copied into each buffer. | |
88 | ||
1ab256cb RM |
89 | If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is |
90 | zero, that is a bug */ | |
91 | ||
92 | struct buffer buffer_local_flags; | |
93 | ||
94 | /* This structure holds the names of symbols whose values may be | |
95 | buffer-local. It is indexed and accessed in the same way as the above. */ | |
96 | ||
6b61353c KH |
97 | DECL_ALIGN (struct buffer, buffer_local_symbols); |
98 | ||
1ab256cb RM |
99 | /* A Lisp_Object pointer to the above, used for staticpro */ |
100 | static Lisp_Object Vbuffer_local_symbols; | |
101 | ||
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 | 186 | |
cab1603f | 187 | extern char * emacs_strerror P_ ((int)); |
b86af064 | 188 | |
1ab256cb RM |
189 | /* For debugging; temporary. See set_buffer_internal. */ |
190 | /* Lisp_Object Qlisp_mode, Vcheck_symbol; */ | |
191 | ||
01136e9b | 192 | void |
1ab256cb RM |
193 | nsberror (spec) |
194 | Lisp_Object spec; | |
195 | { | |
a7a60ce9 | 196 | if (STRINGP (spec)) |
d5db4077 | 197 | error ("No buffer named %s", SDATA (spec)); |
1ab256cb RM |
198 | error ("Invalid buffer argument"); |
199 | } | |
200 | \f | |
0dc88e60 | 201 | DEFUN ("buffer-live-p", Fbuffer_live_p, Sbuffer_live_p, 1, 1, 0, |
7ee72033 MB |
202 | doc: /* Return non-nil if OBJECT is a buffer which has not been killed. |
203 | Value is nil if OBJECT is not a buffer or if it has been killed. */) | |
204 | (object) | |
0dc88e60 RS |
205 | Lisp_Object object; |
206 | { | |
207 | return ((BUFFERP (object) && ! NILP (XBUFFER (object)->name)) | |
208 | ? Qt : Qnil); | |
209 | } | |
210 | ||
08460cd4 | 211 | DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 1, 0, |
7ee72033 | 212 | doc: /* Return a list of all existing live buffers. |
aef466d5 RS |
213 | If the optional arg FRAME is a frame, we return the buffer list |
214 | in the proper order for that frame: the buffers in FRAME's `buffer-list' | |
215 | frame parameter come first, followed by the rest of the buffers. */) | |
7ee72033 | 216 | (frame) |
08460cd4 | 217 | Lisp_Object frame; |
1ab256cb | 218 | { |
08460cd4 RS |
219 | Lisp_Object framelist, general; |
220 | general = Fmapcar (Qcdr, Vbuffer_alist); | |
221 | ||
222 | if (FRAMEP (frame)) | |
223 | { | |
224 | Lisp_Object tail; | |
225 | ||
b7826503 | 226 | CHECK_FRAME (frame); |
08460cd4 RS |
227 | |
228 | framelist = Fcopy_sequence (XFRAME (frame)->buffer_list); | |
229 | ||
230 | /* Remove from GENERAL any buffer that duplicates one in FRAMELIST. */ | |
231 | tail = framelist; | |
232 | while (! NILP (tail)) | |
233 | { | |
7539e11f KR |
234 | general = Fdelq (XCAR (tail), general); |
235 | tail = XCDR (tail); | |
08460cd4 RS |
236 | } |
237 | return nconc2 (framelist, general); | |
238 | } | |
239 | ||
240 | return general; | |
1ab256cb RM |
241 | } |
242 | ||
04ae1b48 RS |
243 | /* Like Fassoc, but use Fstring_equal to compare |
244 | (which ignores text properties), | |
245 | and don't ever QUIT. */ | |
246 | ||
247 | static Lisp_Object | |
248 | assoc_ignore_text_properties (key, list) | |
249 | register Lisp_Object key; | |
250 | Lisp_Object list; | |
251 | { | |
252 | register Lisp_Object tail; | |
6d70a280 | 253 | for (tail = list; CONSP (tail); tail = XCDR (tail)) |
04ae1b48 RS |
254 | { |
255 | register Lisp_Object elt, tem; | |
6d70a280 | 256 | elt = XCAR (tail); |
04ae1b48 RS |
257 | tem = Fstring_equal (Fcar (elt), key); |
258 | if (!NILP (tem)) | |
259 | return elt; | |
260 | } | |
261 | return Qnil; | |
262 | } | |
263 | ||
1ab256cb | 264 | DEFUN ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0, |
7ee72033 | 265 | doc: /* Return the buffer named NAME (a string). |
018ba359 | 266 | If there is no live buffer named NAME, return nil. |
7ee72033 MB |
267 | NAME may also be a buffer; if so, the value is that buffer. */) |
268 | (name) | |
1ab256cb RM |
269 | register Lisp_Object name; |
270 | { | |
a7a60ce9 | 271 | if (BUFFERP (name)) |
1ab256cb | 272 | return name; |
b7826503 | 273 | CHECK_STRING (name); |
1ab256cb | 274 | |
04ae1b48 | 275 | return Fcdr (assoc_ignore_text_properties (name, Vbuffer_alist)); |
1ab256cb RM |
276 | } |
277 | ||
278 | DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0, | |
7ee72033 | 279 | doc: /* Return the buffer visiting file FILENAME (a string). |
018ba359 PJ |
280 | The buffer's `buffer-file-name' must match exactly the expansion of FILENAME. |
281 | If there is no such live buffer, return nil. | |
7ee72033 MB |
282 | See also `find-buffer-visiting'. */) |
283 | (filename) | |
1ab256cb RM |
284 | register Lisp_Object filename; |
285 | { | |
286 | register Lisp_Object tail, buf, tem; | |
5fe0b67e RS |
287 | Lisp_Object handler; |
288 | ||
b7826503 | 289 | CHECK_STRING (filename); |
1ab256cb RM |
290 | filename = Fexpand_file_name (filename, Qnil); |
291 | ||
5fe0b67e RS |
292 | /* If the file name has special constructs in it, |
293 | call the corresponding file handler. */ | |
a617e913 | 294 | handler = Ffind_file_name_handler (filename, Qget_file_buffer); |
5fe0b67e RS |
295 | if (!NILP (handler)) |
296 | return call2 (handler, Qget_file_buffer, filename); | |
297 | ||
7539e11f | 298 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 299 | { |
7539e11f | 300 | buf = Fcdr (XCAR (tail)); |
a7a60ce9 KH |
301 | if (!BUFFERP (buf)) continue; |
302 | if (!STRINGP (XBUFFER (buf)->filename)) continue; | |
1ab256cb | 303 | tem = Fstring_equal (XBUFFER (buf)->filename, filename); |
265a9e55 | 304 | if (!NILP (tem)) |
1ab256cb RM |
305 | return buf; |
306 | } | |
307 | return Qnil; | |
308 | } | |
309 | ||
52e01189 RS |
310 | Lisp_Object |
311 | get_truename_buffer (filename) | |
312 | register Lisp_Object filename; | |
313 | { | |
314 | register Lisp_Object tail, buf, tem; | |
315 | ||
7539e11f | 316 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
52e01189 | 317 | { |
7539e11f | 318 | buf = Fcdr (XCAR (tail)); |
52e01189 RS |
319 | if (!BUFFERP (buf)) continue; |
320 | if (!STRINGP (XBUFFER (buf)->file_truename)) continue; | |
321 | tem = Fstring_equal (XBUFFER (buf)->file_truename, filename); | |
322 | if (!NILP (tem)) | |
323 | return buf; | |
324 | } | |
325 | return Qnil; | |
326 | } | |
327 | ||
1ab256cb RM |
328 | /* Incremented for each buffer created, to assign the buffer number. */ |
329 | int buffer_count; | |
330 | ||
331 | DEFUN ("get-buffer-create", Fget_buffer_create, Sget_buffer_create, 1, 1, 0, | |
7ee72033 | 332 | doc: /* Return the buffer named NAME, or create such a buffer and return it. |
018ba359 PJ |
333 | A new buffer is created if there is no live buffer named NAME. |
334 | If NAME starts with a space, the new buffer does not keep undo information. | |
335 | If NAME is a buffer instead of a string, then it is the value returned. | |
7ee72033 MB |
336 | The value is never nil. */) |
337 | (name) | |
1ab256cb RM |
338 | register Lisp_Object name; |
339 | { | |
a9ee7a59 | 340 | register Lisp_Object buf; |
1ab256cb RM |
341 | register struct buffer *b; |
342 | ||
343 | buf = Fget_buffer (name); | |
265a9e55 | 344 | if (!NILP (buf)) |
1ab256cb RM |
345 | return buf; |
346 | ||
d5db4077 | 347 | if (SCHARS (name) == 0) |
31cd83e9 KH |
348 | error ("Empty string for buffer name is not allowed"); |
349 | ||
a21260d9 | 350 | b = (struct buffer *) allocate_buffer (); |
1ab256cb | 351 | |
336cd056 RS |
352 | b->size = sizeof (struct buffer) / sizeof (EMACS_INT); |
353 | ||
354 | /* An ordinary buffer uses its own struct buffer_text. */ | |
355 | b->text = &b->own_text; | |
356 | b->base_buffer = 0; | |
357 | ||
1ab256cb | 358 | BUF_GAP_SIZE (b) = 20; |
9ac0d9e0 | 359 | BLOCK_INPUT; |
3b06f880 KH |
360 | /* We allocate extra 1-byte at the tail and keep it always '\0' for |
361 | anchoring a search. */ | |
b86af064 | 362 | alloc_buffer_text (b, BUF_GAP_SIZE (b) + 1); |
9ac0d9e0 | 363 | UNBLOCK_INPUT; |
1ab256cb | 364 | if (! BUF_BEG_ADDR (b)) |
81841847 | 365 | buffer_memory_full (); |
1ab256cb | 366 | |
6d70a280 SM |
367 | BUF_PT (b) = BEG; |
368 | BUF_GPT (b) = BEG; | |
369 | BUF_BEGV (b) = BEG; | |
370 | BUF_ZV (b) = BEG; | |
371 | BUF_Z (b) = BEG; | |
372 | BUF_PT_BYTE (b) = BEG_BYTE; | |
373 | BUF_GPT_BYTE (b) = BEG_BYTE; | |
374 | BUF_BEGV_BYTE (b) = BEG_BYTE; | |
375 | BUF_ZV_BYTE (b) = BEG_BYTE; | |
376 | BUF_Z_BYTE (b) = BEG_BYTE; | |
1ab256cb | 377 | BUF_MODIFF (b) = 1; |
3e145152 | 378 | BUF_CHARS_MODIFF (b) = 1; |
2509d356 | 379 | BUF_OVERLAY_MODIFF (b) = 1; |
336cd056 RS |
380 | BUF_SAVE_MODIFF (b) = 1; |
381 | BUF_INTERVALS (b) = 0; | |
b5a225b4 GM |
382 | BUF_UNCHANGED_MODIFIED (b) = 1; |
383 | BUF_OVERLAY_UNCHANGED_MODIFIED (b) = 1; | |
384 | BUF_END_UNCHANGED (b) = 0; | |
385 | BUF_BEG_UNCHANGED (b) = 0; | |
3b06f880 | 386 | *(BUF_GPT_ADDR (b)) = *(BUF_Z_ADDR (b)) = 0; /* Put an anchor '\0'. */ |
1ab256cb | 387 | |
28e969dd JB |
388 | b->newline_cache = 0; |
389 | b->width_run_cache = 0; | |
390 | b->width_table = Qnil; | |
b5a225b4 | 391 | b->prevent_redisplay_optimizations_p = 1; |
28e969dd | 392 | |
1ab256cb RM |
393 | /* Put this on the chain of all buffers including killed ones. */ |
394 | b->next = all_buffers; | |
395 | all_buffers = b; | |
396 | ||
336cd056 RS |
397 | /* An ordinary buffer normally doesn't need markers |
398 | to handle BEGV and ZV. */ | |
399 | b->pt_marker = Qnil; | |
400 | b->begv_marker = Qnil; | |
401 | b->zv_marker = Qnil; | |
04ae1b48 RS |
402 | |
403 | name = Fcopy_sequence (name); | |
ab77f05c | 404 | STRING_SET_INTERVALS (name, NULL_INTERVAL); |
1ab256cb | 405 | b->name = name; |
04ae1b48 | 406 | |
d5db4077 | 407 | if (SREF (name, 0) != ' ') |
1ab256cb RM |
408 | b->undo_list = Qnil; |
409 | else | |
410 | b->undo_list = Qt; | |
411 | ||
412 | reset_buffer (b); | |
13de9290 | 413 | reset_buffer_local_variables (b, 1); |
1ab256cb | 414 | |
1f57cb74 | 415 | b->mark = Fmake_marker (); |
65745fad | 416 | BUF_MARKERS (b) = NULL; |
1f57cb74 RS |
417 | b->name = name; |
418 | ||
1ab256cb | 419 | /* Put this in the alist of all live buffers. */ |
67180c6a | 420 | XSETBUFFER (buf, b); |
1ab256cb RM |
421 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); |
422 | ||
2f064abf | 423 | /* An error in calling the function here (should someone redefine it) |
d36b182f DL |
424 | can lead to infinite regress until you run out of stack. rms |
425 | says that's not worth protecting against. */ | |
48265e61 | 426 | if (!NILP (Ffboundp (Qucs_set_table_for_input))) |
d36b182f | 427 | /* buf is on buffer-alist, so no gcpro. */ |
48265e61 DL |
428 | call1 (Qucs_set_table_for_input, buf); |
429 | ||
336cd056 RS |
430 | return buf; |
431 | } | |
432 | ||
7e9d5818 | 433 | |
04e4cb3a GM |
434 | /* Return a list of overlays which is a copy of the overlay list |
435 | LIST, but for buffer B. */ | |
436 | ||
2410d73a | 437 | static struct Lisp_Overlay * |
04e4cb3a GM |
438 | copy_overlays (b, list) |
439 | struct buffer *b; | |
2410d73a | 440 | struct Lisp_Overlay *list; |
04e4cb3a | 441 | { |
2410d73a SM |
442 | Lisp_Object buffer; |
443 | struct Lisp_Overlay *result = NULL, *tail = NULL; | |
04e4cb3a GM |
444 | |
445 | XSETBUFFER (buffer, b); | |
446 | ||
2410d73a | 447 | for (; list; list = list->next) |
04e4cb3a GM |
448 | { |
449 | Lisp_Object overlay, start, end, old_overlay; | |
27c6b98e | 450 | EMACS_INT charpos; |
04e4cb3a | 451 | |
2410d73a | 452 | XSETMISC (old_overlay, list); |
04e4cb3a GM |
453 | charpos = marker_position (OVERLAY_START (old_overlay)); |
454 | start = Fmake_marker (); | |
db3a49a6 | 455 | Fset_marker (start, make_number (charpos), buffer); |
04e4cb3a GM |
456 | XMARKER (start)->insertion_type |
457 | = XMARKER (OVERLAY_START (old_overlay))->insertion_type; | |
458 | ||
459 | charpos = marker_position (OVERLAY_END (old_overlay)); | |
460 | end = Fmake_marker (); | |
db3a49a6 | 461 | Fset_marker (end, make_number (charpos), buffer); |
04e4cb3a GM |
462 | XMARKER (end)->insertion_type |
463 | = XMARKER (OVERLAY_END (old_overlay))->insertion_type; | |
464 | ||
465 | overlay = allocate_misc (); | |
466 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; | |
467 | OVERLAY_START (overlay) = start; | |
468 | OVERLAY_END (overlay) = end; | |
469 | OVERLAY_PLIST (overlay) = Fcopy_sequence (OVERLAY_PLIST (old_overlay)); | |
2410d73a | 470 | XOVERLAY (overlay)->next = NULL; |
177c0ea7 | 471 | |
2410d73a SM |
472 | if (tail) |
473 | tail = tail->next = XOVERLAY (overlay); | |
474 | else | |
475 | result = tail = XOVERLAY (overlay); | |
04e4cb3a GM |
476 | } |
477 | ||
2410d73a | 478 | return result; |
04e4cb3a | 479 | } |
177c0ea7 | 480 | |
04e4cb3a | 481 | |
7e9d5818 GM |
482 | /* Clone per-buffer values of buffer FROM. |
483 | ||
484 | Buffer TO gets the same per-buffer values as FROM, with the | |
485 | following exceptions: (1) TO's name is left untouched, (2) markers | |
486 | are copied and made to refer to TO, and (3) overlay lists are | |
487 | copied. */ | |
488 | ||
489 | static void | |
490 | clone_per_buffer_values (from, to) | |
491 | struct buffer *from, *to; | |
492 | { | |
54622f33 | 493 | Lisp_Object to_buffer; |
7e9d5818 GM |
494 | int offset; |
495 | ||
496 | XSETBUFFER (to_buffer, to); | |
177c0ea7 | 497 | |
7e9d5818 GM |
498 | for (offset = PER_BUFFER_VAR_OFFSET (name) + sizeof (Lisp_Object); |
499 | offset < sizeof *to; | |
500 | offset += sizeof (Lisp_Object)) | |
501 | { | |
502 | Lisp_Object obj; | |
503 | ||
504 | obj = PER_BUFFER_VALUE (from, offset); | |
505 | if (MARKERP (obj)) | |
506 | { | |
507 | struct Lisp_Marker *m = XMARKER (obj); | |
508 | obj = Fmake_marker (); | |
509 | XMARKER (obj)->insertion_type = m->insertion_type; | |
510 | set_marker_both (obj, to_buffer, m->charpos, m->bytepos); | |
511 | } | |
512 | ||
513 | PER_BUFFER_VALUE (to, offset) = obj; | |
514 | } | |
515 | ||
7e9d5818 | 516 | bcopy (from->local_flags, to->local_flags, sizeof to->local_flags); |
177c0ea7 | 517 | |
04e4cb3a GM |
518 | to->overlays_before = copy_overlays (to, from->overlays_before); |
519 | to->overlays_after = copy_overlays (to, from->overlays_after); | |
02f28bbd | 520 | |
e1688f54 RS |
521 | /* Get (a copy of) the alist of Lisp-level local variables of FROM |
522 | and install that in TO. */ | |
523 | to->local_var_alist = buffer_lisp_local_variables (from); | |
7e9d5818 GM |
524 | } |
525 | ||
7e9d5818 GM |
526 | DEFUN ("make-indirect-buffer", Fmake_indirect_buffer, Smake_indirect_buffer, |
527 | 2, 3, | |
193c3837 | 528 | "bMake indirect buffer (to buffer): \nBName of indirect buffer: ", |
7ee72033 | 529 | doc: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME. |
6b61353c | 530 | BASE-BUFFER should be a live buffer, or the name of an existing buffer. |
018ba359 PJ |
531 | NAME should be a string which is not the name of an existing buffer. |
532 | Optional argument CLONE non-nil means preserve BASE-BUFFER's state, | |
533 | such as major and minor modes, in the indirect buffer. | |
7ee72033 MB |
534 | CLONE nil means the indirect buffer's state is reset to default values. */) |
535 | (base_buffer, name, clone) | |
7e9d5818 | 536 | Lisp_Object base_buffer, name, clone; |
336cd056 | 537 | { |
6b61353c | 538 | Lisp_Object buf, tem; |
7e9d5818 | 539 | struct buffer *b; |
336cd056 | 540 | |
6b61353c | 541 | CHECK_STRING (name); |
336cd056 RS |
542 | buf = Fget_buffer (name); |
543 | if (!NILP (buf)) | |
d5db4077 | 544 | error ("Buffer name `%s' is in use", SDATA (name)); |
336cd056 | 545 | |
6b61353c | 546 | tem = base_buffer; |
336cd056 RS |
547 | base_buffer = Fget_buffer (base_buffer); |
548 | if (NILP (base_buffer)) | |
6b61353c KH |
549 | error ("No such buffer: `%s'", SDATA (tem)); |
550 | if (NILP (XBUFFER (base_buffer)->name)) | |
551 | error ("Base buffer has been killed"); | |
336cd056 | 552 | |
d5db4077 | 553 | if (SCHARS (name) == 0) |
336cd056 RS |
554 | error ("Empty string for buffer name is not allowed"); |
555 | ||
a21260d9 | 556 | b = (struct buffer *) allocate_buffer (); |
336cd056 RS |
557 | b->size = sizeof (struct buffer) / sizeof (EMACS_INT); |
558 | ||
559 | if (XBUFFER (base_buffer)->base_buffer) | |
560 | b->base_buffer = XBUFFER (base_buffer)->base_buffer; | |
561 | else | |
562 | b->base_buffer = XBUFFER (base_buffer); | |
563 | ||
564 | /* Use the base buffer's text object. */ | |
565 | b->text = b->base_buffer->text; | |
566 | ||
567 | BUF_BEGV (b) = BUF_BEGV (b->base_buffer); | |
568 | BUF_ZV (b) = BUF_ZV (b->base_buffer); | |
569 | BUF_PT (b) = BUF_PT (b->base_buffer); | |
3f236a40 RS |
570 | BUF_BEGV_BYTE (b) = BUF_BEGV_BYTE (b->base_buffer); |
571 | BUF_ZV_BYTE (b) = BUF_ZV_BYTE (b->base_buffer); | |
572 | BUF_PT_BYTE (b) = BUF_PT_BYTE (b->base_buffer); | |
336cd056 RS |
573 | |
574 | b->newline_cache = 0; | |
575 | b->width_run_cache = 0; | |
576 | b->width_table = Qnil; | |
577 | ||
578 | /* Put this on the chain of all buffers including killed ones. */ | |
579 | b->next = all_buffers; | |
580 | all_buffers = b; | |
581 | ||
582 | name = Fcopy_sequence (name); | |
ab77f05c | 583 | STRING_SET_INTERVALS (name, NULL_INTERVAL); |
336cd056 RS |
584 | b->name = name; |
585 | ||
586 | reset_buffer (b); | |
13de9290 | 587 | reset_buffer_local_variables (b, 1); |
336cd056 RS |
588 | |
589 | /* Put this in the alist of all live buffers. */ | |
590 | XSETBUFFER (buf, b); | |
591 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); | |
592 | ||
593 | b->mark = Fmake_marker (); | |
1ab256cb | 594 | b->name = name; |
336cd056 | 595 | |
abc9d959 RS |
596 | /* The multibyte status belongs to the base buffer. */ |
597 | b->enable_multibyte_characters = b->base_buffer->enable_multibyte_characters; | |
598 | ||
336cd056 RS |
599 | /* Make sure the base buffer has markers for its narrowing. */ |
600 | if (NILP (b->base_buffer->pt_marker)) | |
601 | { | |
602 | b->base_buffer->pt_marker = Fmake_marker (); | |
3f236a40 RS |
603 | set_marker_both (b->base_buffer->pt_marker, base_buffer, |
604 | BUF_PT (b->base_buffer), | |
605 | BUF_PT_BYTE (b->base_buffer)); | |
336cd056 RS |
606 | } |
607 | if (NILP (b->base_buffer->begv_marker)) | |
608 | { | |
609 | b->base_buffer->begv_marker = Fmake_marker (); | |
3f236a40 RS |
610 | set_marker_both (b->base_buffer->begv_marker, base_buffer, |
611 | BUF_BEGV (b->base_buffer), | |
612 | BUF_BEGV_BYTE (b->base_buffer)); | |
336cd056 RS |
613 | } |
614 | if (NILP (b->base_buffer->zv_marker)) | |
615 | { | |
616 | b->base_buffer->zv_marker = Fmake_marker (); | |
3f236a40 RS |
617 | set_marker_both (b->base_buffer->zv_marker, base_buffer, |
618 | BUF_ZV (b->base_buffer), | |
619 | BUF_ZV_BYTE (b->base_buffer)); | |
26d84681 | 620 | XMARKER (b->base_buffer->zv_marker)->insertion_type = 1; |
336cd056 RS |
621 | } |
622 | ||
7e9d5818 GM |
623 | if (NILP (clone)) |
624 | { | |
625 | /* Give the indirect buffer markers for its narrowing. */ | |
626 | b->pt_marker = Fmake_marker (); | |
627 | set_marker_both (b->pt_marker, buf, BUF_PT (b), BUF_PT_BYTE (b)); | |
628 | b->begv_marker = Fmake_marker (); | |
629 | set_marker_both (b->begv_marker, buf, BUF_BEGV (b), BUF_BEGV_BYTE (b)); | |
630 | b->zv_marker = Fmake_marker (); | |
631 | set_marker_both (b->zv_marker, buf, BUF_ZV (b), BUF_ZV_BYTE (b)); | |
632 | XMARKER (b->zv_marker)->insertion_type = 1; | |
633 | } | |
634 | else | |
7fa57e45 RS |
635 | { |
636 | struct buffer *old_b = current_buffer; | |
637 | ||
638 | clone_per_buffer_values (b->base_buffer, b); | |
639 | b->filename = Qnil; | |
640 | b->file_truename = Qnil; | |
641 | b->display_count = make_number (0); | |
642 | b->backed_up = Qnil; | |
643 | b->auto_save_file_name = Qnil; | |
644 | set_buffer_internal_1 (b); | |
645 | Fset (intern ("buffer-save-without-query"), Qnil); | |
646 | Fset (intern ("buffer-file-number"), Qnil); | |
647 | Fset (intern ("buffer-stale-function"), Qnil); | |
648 | set_buffer_internal_1 (old_b); | |
649 | } | |
336cd056 | 650 | |
a9ee7a59 | 651 | return buf; |
1ab256cb RM |
652 | } |
653 | ||
d4f5719a SM |
654 | void |
655 | delete_all_overlays (b) | |
656 | struct buffer *b; | |
657 | { | |
658 | Lisp_Object overlay; | |
659 | ||
660 | /* `reset_buffer' blindly sets the list of overlays to NULL, so we | |
661 | have to empty the list, otherwise we end up with overlays that | |
662 | think they belong to this buffer while the buffer doesn't know about | |
663 | them any more. */ | |
664 | while (b->overlays_before) | |
665 | { | |
666 | XSETMISC (overlay, b->overlays_before); | |
667 | Fdelete_overlay (overlay); | |
668 | } | |
669 | while (b->overlays_after) | |
670 | { | |
671 | XSETMISC (overlay, b->overlays_after); | |
672 | Fdelete_overlay (overlay); | |
673 | } | |
674 | eassert (b->overlays_before == NULL); | |
675 | eassert (b->overlays_after == NULL); | |
676 | } | |
677 | ||
bcd40520 | 678 | /* Reinitialize everything about a buffer except its name and contents |
6b61353c | 679 | and local variables. |
d4f5719a SM |
680 | If called on an already-initialized buffer, the list of overlays |
681 | should be deleted before calling this function, otherwise we end up | |
682 | with overlays that claim to belong to the buffer but the buffer | |
683 | claims it doesn't belong to it. */ | |
1ab256cb RM |
684 | |
685 | void | |
686 | reset_buffer (b) | |
687 | register struct buffer *b; | |
688 | { | |
689 | b->filename = Qnil; | |
f6ed2e84 | 690 | b->file_truename = Qnil; |
1ab256cb RM |
691 | b->directory = (current_buffer) ? current_buffer->directory : Qnil; |
692 | b->modtime = 0; | |
8d7a4592 | 693 | XSETFASTINT (b->save_length, 0); |
1ab256cb | 694 | b->last_window_start = 1; |
8b264726 | 695 | /* It is more conservative to start out "changed" than "unchanged". */ |
b5a225b4 GM |
696 | b->clip_changed = 0; |
697 | b->prevent_redisplay_optimizations_p = 1; | |
1ab256cb RM |
698 | b->backed_up = Qnil; |
699 | b->auto_save_modified = 0; | |
84f6bcba | 700 | b->auto_save_failure_time = -1; |
1ab256cb RM |
701 | b->auto_save_file_name = Qnil; |
702 | b->read_only = Qnil; | |
2410d73a SM |
703 | b->overlays_before = NULL; |
704 | b->overlays_after = NULL; | |
c2d5b10f | 705 | b->overlay_center = BEG; |
dfda7a7f | 706 | b->mark_active = Qnil; |
943e065b | 707 | b->point_before_scroll = Qnil; |
be9aafdd | 708 | b->file_format = Qnil; |
71ed49fa | 709 | b->auto_save_file_format = Qt; |
0dc6f165 | 710 | b->last_selected_window = Qnil; |
7962a441 | 711 | XSETINT (b->display_count, 0); |
3fd364db | 712 | b->display_time = Qnil; |
1bf08baf | 713 | b->enable_multibyte_characters = buffer_defaults.enable_multibyte_characters; |
bb2ec976 | 714 | b->cursor_type = buffer_defaults.cursor_type; |
a3bbced0 | 715 | b->extra_line_spacing = buffer_defaults.extra_line_spacing; |
0522997d RS |
716 | |
717 | b->display_error_modiff = 0; | |
1ab256cb RM |
718 | } |
719 | ||
bcd40520 RS |
720 | /* Reset buffer B's local variables info. |
721 | Don't use this on a buffer that has already been in use; | |
722 | it does not treat permanent locals consistently. | |
13de9290 RS |
723 | Instead, use Fkill_all_local_variables. |
724 | ||
725 | If PERMANENT_TOO is 1, then we reset permanent built-in | |
726 | buffer-local variables. If PERMANENT_TOO is 0, | |
727 | we preserve those. */ | |
bcd40520 | 728 | |
13de9290 RS |
729 | static void |
730 | reset_buffer_local_variables (b, permanent_too) | |
1ab256cb | 731 | register struct buffer *b; |
13de9290 | 732 | int permanent_too; |
1ab256cb RM |
733 | { |
734 | register int offset; | |
7c02e886 | 735 | int i; |
1ab256cb RM |
736 | |
737 | /* Reset the major mode to Fundamental, together with all the | |
738 | things that depend on the major mode. | |
739 | default-major-mode is handled at a higher level. | |
740 | We ignore it here. */ | |
741 | b->major_mode = Qfundamental_mode; | |
742 | b->keymap = Qnil; | |
1ab256cb RM |
743 | b->mode_name = QSFundamental; |
744 | b->minor_modes = Qnil; | |
3446af9c RS |
745 | |
746 | /* If the standard case table has been altered and invalidated, | |
747 | fix up its insides first. */ | |
748 | if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[0]) | |
749 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[1]) | |
750 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[2]))) | |
751 | Fset_standard_case_table (Vascii_downcase_table); | |
752 | ||
1ab256cb | 753 | b->downcase_table = Vascii_downcase_table; |
1e9b6335 RS |
754 | b->upcase_table = XCHAR_TABLE (Vascii_downcase_table)->extras[0]; |
755 | b->case_canon_table = XCHAR_TABLE (Vascii_downcase_table)->extras[1]; | |
756 | b->case_eqv_table = XCHAR_TABLE (Vascii_downcase_table)->extras[2]; | |
3cb719bd | 757 | b->invisibility_spec = Qt; |
2e716096 RS |
758 | #ifndef DOS_NT |
759 | b->buffer_file_type = Qnil; | |
760 | #endif | |
3cb719bd | 761 | |
13de9290 | 762 | /* Reset all (or most) per-buffer variables to their defaults. */ |
1ab256cb | 763 | b->local_var_alist = Qnil; |
7313acd0 | 764 | for (i = 0; i < last_per_buffer_idx; ++i) |
7c02e886 | 765 | if (permanent_too || buffer_permanent_local_flags[i] == 0) |
7313acd0 | 766 | SET_PER_BUFFER_VALUE_P (b, i, 0); |
1ab256cb RM |
767 | |
768 | /* For each slot that has a default value, | |
769 | copy that into the slot. */ | |
770 | ||
7313acd0 | 771 | for (offset = PER_BUFFER_VAR_OFFSET (name); |
7c02e886 GM |
772 | offset < sizeof *b; |
773 | offset += sizeof (Lisp_Object)) | |
aab80822 | 774 | { |
7313acd0 | 775 | int idx = PER_BUFFER_IDX (offset); |
7c02e886 GM |
776 | if ((idx > 0 |
777 | && (permanent_too | |
778 | || buffer_permanent_local_flags[idx] == 0)) | |
779 | /* Is -2 used anywhere? */ | |
780 | || idx == -2) | |
7313acd0 | 781 | PER_BUFFER_VALUE (b, offset) = PER_BUFFER_DEFAULT (offset); |
aab80822 | 782 | } |
1ab256cb RM |
783 | } |
784 | ||
01050cb5 RM |
785 | /* We split this away from generate-new-buffer, because rename-buffer |
786 | and set-visited-file-name ought to be able to use this to really | |
787 | rename the buffer properly. */ | |
788 | ||
789 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, Sgenerate_new_buffer_name, | |
efc7e75f | 790 | 1, 2, 0, |
7ee72033 | 791 | doc: /* Return a string that is the name of no existing buffer based on NAME. |
018ba359 PJ |
792 | If there is no live buffer named NAME, then return NAME. |
793 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER | |
6b61353c | 794 | \(starting at 2) until an unused name is found, and then return that name. |
2f064abf JB |
795 | Optional second argument IGNORE specifies a name that is okay to use (if |
796 | it is in the sequence to be tried) even if a buffer with that name exists. */) | |
7ee72033 | 797 | (name, ignore) |
c273e647 | 798 | register Lisp_Object name, ignore; |
1ab256cb RM |
799 | { |
800 | register Lisp_Object gentemp, tem; | |
801 | int count; | |
802 | char number[10]; | |
803 | ||
b7826503 | 804 | CHECK_STRING (name); |
1ab256cb | 805 | |
6b61353c KH |
806 | tem = Fstring_equal (name, ignore); |
807 | if (!NILP (tem)) | |
808 | return name; | |
1ab256cb | 809 | tem = Fget_buffer (name); |
265a9e55 | 810 | if (NILP (tem)) |
01050cb5 | 811 | return name; |
1ab256cb RM |
812 | |
813 | count = 1; | |
814 | while (1) | |
815 | { | |
816 | sprintf (number, "<%d>", ++count); | |
817 | gentemp = concat2 (name, build_string (number)); | |
638e4fc3 | 818 | tem = Fstring_equal (gentemp, ignore); |
c273e647 RS |
819 | if (!NILP (tem)) |
820 | return gentemp; | |
1ab256cb | 821 | tem = Fget_buffer (gentemp); |
265a9e55 | 822 | if (NILP (tem)) |
01050cb5 | 823 | return gentemp; |
1ab256cb RM |
824 | } |
825 | } | |
826 | ||
827 | \f | |
828 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, | |
7ee72033 MB |
829 | doc: /* Return the name of BUFFER, as a string. |
830 | With no argument or nil as argument, return the name of the current buffer. */) | |
831 | (buffer) | |
1ab256cb RM |
832 | register Lisp_Object buffer; |
833 | { | |
265a9e55 | 834 | if (NILP (buffer)) |
1ab256cb | 835 | return current_buffer->name; |
b7826503 | 836 | CHECK_BUFFER (buffer); |
1ab256cb RM |
837 | return XBUFFER (buffer)->name; |
838 | } | |
839 | ||
840 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, | |
7ee72033 MB |
841 | doc: /* Return name of file BUFFER is visiting, or nil if none. |
842 | No argument or nil as argument means use the current buffer. */) | |
843 | (buffer) | |
1ab256cb RM |
844 | register Lisp_Object buffer; |
845 | { | |
265a9e55 | 846 | if (NILP (buffer)) |
1ab256cb | 847 | return current_buffer->filename; |
b7826503 | 848 | CHECK_BUFFER (buffer); |
1ab256cb RM |
849 | return XBUFFER (buffer)->filename; |
850 | } | |
851 | ||
336cd056 RS |
852 | DEFUN ("buffer-base-buffer", Fbuffer_base_buffer, Sbuffer_base_buffer, |
853 | 0, 1, 0, | |
7ee72033 | 854 | doc: /* Return the base buffer of indirect buffer BUFFER. |
5a72efd4 LT |
855 | If BUFFER is not indirect, return nil. |
856 | BUFFER defaults to the current buffer. */) | |
7ee72033 | 857 | (buffer) |
336cd056 RS |
858 | register Lisp_Object buffer; |
859 | { | |
860 | struct buffer *base; | |
861 | Lisp_Object base_buffer; | |
862 | ||
863 | if (NILP (buffer)) | |
864 | base = current_buffer->base_buffer; | |
865 | else | |
866 | { | |
b7826503 | 867 | CHECK_BUFFER (buffer); |
336cd056 RS |
868 | base = XBUFFER (buffer)->base_buffer; |
869 | } | |
870 | ||
871 | if (! base) | |
872 | return Qnil; | |
873 | XSETBUFFER (base_buffer, base); | |
874 | return base_buffer; | |
875 | } | |
876 | ||
79aa712d | 877 | DEFUN ("buffer-local-value", Fbuffer_local_value, |
177c0ea7 | 878 | Sbuffer_local_value, 2, 2, 0, |
79aa712d RS |
879 | doc: /* Return the value of VARIABLE in BUFFER. |
880 | If VARIABLE does not have a buffer-local binding in BUFFER, the value | |
5e2ad10b JB |
881 | is the default binding of the variable. */) |
882 | (variable, buffer) | |
883 | register Lisp_Object variable; | |
79aa712d RS |
884 | register Lisp_Object buffer; |
885 | { | |
886 | register struct buffer *buf; | |
887 | register Lisp_Object result; | |
888 | ||
5e2ad10b | 889 | CHECK_SYMBOL (variable); |
ae69175b | 890 | CHECK_BUFFER (buffer); |
79aa712d RS |
891 | buf = XBUFFER (buffer); |
892 | ||
0e4d0c9a RS |
893 | if (SYMBOLP (variable)) |
894 | variable = indirect_variable (variable); | |
895 | ||
79aa712d | 896 | /* Look in local_var_list */ |
5e2ad10b | 897 | result = Fassoc (variable, buf->local_var_alist); |
177c0ea7 | 898 | if (NILP (result)) |
79aa712d RS |
899 | { |
900 | int offset, idx; | |
901 | int found = 0; | |
902 | ||
903 | /* Look in special slots */ | |
904 | for (offset = PER_BUFFER_VAR_OFFSET (name); | |
905 | offset < sizeof (struct buffer); | |
906 | /* sizeof EMACS_INT == sizeof Lisp_Object */ | |
907 | offset += (sizeof (EMACS_INT))) | |
908 | { | |
909 | idx = PER_BUFFER_IDX (offset); | |
910 | if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx)) | |
177c0ea7 | 911 | && SYMBOLP (PER_BUFFER_SYMBOL (offset)) |
5e2ad10b | 912 | && EQ (PER_BUFFER_SYMBOL (offset), variable)) |
79aa712d RS |
913 | { |
914 | result = PER_BUFFER_VALUE (buf, offset); | |
915 | found = 1; | |
916 | break; | |
917 | } | |
918 | } | |
919 | ||
920 | if (!found) | |
5e2ad10b | 921 | result = Fdefault_value (variable); |
79aa712d RS |
922 | } |
923 | else | |
f0bac7de RS |
924 | { |
925 | Lisp_Object valcontents; | |
926 | Lisp_Object current_alist_element; | |
927 | ||
928 | /* What binding is loaded right now? */ | |
5e2ad10b | 929 | valcontents = SYMBOL_VALUE (variable); |
f0bac7de RS |
930 | current_alist_element |
931 | = XCAR (XBUFFER_LOCAL_VALUE (valcontents)->cdr); | |
932 | ||
933 | /* The value of the currently loaded binding is not | |
934 | stored in it, but rather in the realvalue slot. | |
935 | Store that value into the binding it belongs to | |
936 | in case that is the one we are about to use. */ | |
937 | ||
938 | Fsetcdr (current_alist_element, | |
939 | do_symval_forwarding (XBUFFER_LOCAL_VALUE (valcontents)->realvalue)); | |
940 | ||
941 | /* Now get the (perhaps updated) value out of the binding. */ | |
942 | result = XCDR (result); | |
943 | } | |
79aa712d | 944 | |
4c4dc0b0 KS |
945 | if (!EQ (result, Qunbound)) |
946 | return result; | |
79aa712d | 947 | |
4c4dc0b0 | 948 | xsignal1 (Qvoid_variable, variable); |
79aa712d RS |
949 | } |
950 | ||
e1688f54 | 951 | /* Return an alist of the Lisp-level buffer-local bindings of |
7fa57e45 | 952 | buffer BUF. That is, don't include the variables maintained |
e1688f54 RS |
953 | in special slots in the buffer object. */ |
954 | ||
955 | static Lisp_Object | |
956 | buffer_lisp_local_variables (buf) | |
957 | struct buffer *buf; | |
958 | { | |
959 | Lisp_Object result = Qnil; | |
960 | register Lisp_Object tail; | |
961 | for (tail = buf->local_var_alist; CONSP (tail); tail = XCDR (tail)) | |
962 | { | |
963 | Lisp_Object val, elt; | |
964 | ||
965 | elt = XCAR (tail); | |
966 | ||
967 | /* Reference each variable in the alist in buf. | |
968 | If inquiring about the current buffer, this gets the current values, | |
969 | so store them into the alist so the alist is up to date. | |
970 | If inquiring about some other buffer, this swaps out any values | |
971 | for that buffer, making the alist up to date automatically. */ | |
972 | val = find_symbol_value (XCAR (elt)); | |
973 | /* Use the current buffer value only if buf is the current buffer. */ | |
974 | if (buf != current_buffer) | |
975 | val = XCDR (elt); | |
976 | ||
977 | /* If symbol is unbound, put just the symbol in the list. */ | |
978 | if (EQ (val, Qunbound)) | |
979 | result = Fcons (XCAR (elt), result); | |
980 | /* Otherwise, put (symbol . value) in the list. */ | |
981 | else | |
982 | result = Fcons (Fcons (XCAR (elt), val), result); | |
983 | } | |
984 | ||
985 | return result; | |
986 | } | |
987 | ||
1ab256cb | 988 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, |
efc7e75f | 989 | Sbuffer_local_variables, 0, 1, 0, |
7ee72033 | 990 | doc: /* Return an alist of variables that are buffer-local in BUFFER. |
018ba359 PJ |
991 | Most elements look like (SYMBOL . VALUE), describing one variable. |
992 | For a symbol that is locally unbound, just the symbol appears in the value. | |
993 | Note that storing new VALUEs in these elements doesn't change the variables. | |
7ee72033 MB |
994 | No argument or nil as argument means use current buffer as BUFFER. */) |
995 | (buffer) | |
1ab256cb RM |
996 | register Lisp_Object buffer; |
997 | { | |
998 | register struct buffer *buf; | |
553defa4 | 999 | register Lisp_Object result; |
1ab256cb | 1000 | |
265a9e55 | 1001 | if (NILP (buffer)) |
1ab256cb RM |
1002 | buf = current_buffer; |
1003 | else | |
1004 | { | |
b7826503 | 1005 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1006 | buf = XBUFFER (buffer); |
1007 | } | |
1008 | ||
e1688f54 | 1009 | result = buffer_lisp_local_variables (buf); |
1ab256cb | 1010 | |
1ab256cb RM |
1011 | /* Add on all the variables stored in special slots. */ |
1012 | { | |
7c02e886 | 1013 | int offset, idx; |
1ab256cb | 1014 | |
7313acd0 | 1015 | for (offset = PER_BUFFER_VAR_OFFSET (name); |
1ab256cb | 1016 | offset < sizeof (struct buffer); |
7c02e886 GM |
1017 | /* sizeof EMACS_INT == sizeof Lisp_Object */ |
1018 | offset += (sizeof (EMACS_INT))) | |
1ab256cb | 1019 | { |
7313acd0 GM |
1020 | idx = PER_BUFFER_IDX (offset); |
1021 | if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx)) | |
1022 | && SYMBOLP (PER_BUFFER_SYMBOL (offset))) | |
1023 | result = Fcons (Fcons (PER_BUFFER_SYMBOL (offset), | |
1024 | PER_BUFFER_VALUE (buf, offset)), | |
7c02e886 | 1025 | result); |
1ab256cb RM |
1026 | } |
1027 | } | |
553defa4 RS |
1028 | |
1029 | return result; | |
1ab256cb | 1030 | } |
1ab256cb RM |
1031 | \f |
1032 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, | |
efc7e75f | 1033 | 0, 1, 0, |
7ee72033 MB |
1034 | doc: /* Return t if BUFFER was modified since its file was last read or saved. |
1035 | No argument or nil as argument means use current buffer as BUFFER. */) | |
1036 | (buffer) | |
1ab256cb RM |
1037 | register Lisp_Object buffer; |
1038 | { | |
1039 | register struct buffer *buf; | |
265a9e55 | 1040 | if (NILP (buffer)) |
1ab256cb RM |
1041 | buf = current_buffer; |
1042 | else | |
1043 | { | |
b7826503 | 1044 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1045 | buf = XBUFFER (buffer); |
1046 | } | |
1047 | ||
336cd056 | 1048 | return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil; |
1ab256cb RM |
1049 | } |
1050 | ||
1051 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, | |
efc7e75f | 1052 | 1, 1, 0, |
7ee72033 MB |
1053 | doc: /* Mark current buffer as modified or unmodified according to FLAG. |
1054 | A non-nil FLAG means mark the buffer modified. */) | |
1055 | (flag) | |
1ab256cb RM |
1056 | register Lisp_Object flag; |
1057 | { | |
1058 | register int already; | |
1059 | register Lisp_Object fn; | |
8ec01c70 | 1060 | Lisp_Object buffer, window; |
1ab256cb RM |
1061 | |
1062 | #ifdef CLASH_DETECTION | |
1063 | /* If buffer becoming modified, lock the file. | |
1064 | If buffer becoming unmodified, unlock the file. */ | |
1065 | ||
60f4dd23 | 1066 | fn = current_buffer->file_truename; |
90d456d2 KH |
1067 | /* Test buffer-file-name so that binding it to nil is effective. */ |
1068 | if (!NILP (fn) && ! NILP (current_buffer->filename)) | |
1ab256cb | 1069 | { |
336cd056 | 1070 | already = SAVE_MODIFF < MODIFF; |
265a9e55 | 1071 | if (!already && !NILP (flag)) |
1ab256cb | 1072 | lock_file (fn); |
265a9e55 | 1073 | else if (already && NILP (flag)) |
1ab256cb RM |
1074 | unlock_file (fn); |
1075 | } | |
1076 | #endif /* CLASH_DETECTION */ | |
1077 | ||
336cd056 | 1078 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
177c0ea7 | 1079 | |
8ec01c70 GM |
1080 | /* Set update_mode_lines only if buffer is displayed in some window. |
1081 | Packages like jit-lock or lazy-lock preserve a buffer's modified | |
1082 | state by recording/restoring the state around blocks of code. | |
1083 | Setting update_mode_lines makes redisplay consider all windows | |
1084 | (on all frames). Stealth fontification of buffers not displayed | |
1085 | would incur additional redisplay costs if we'd set | |
1086 | update_modes_lines unconditionally. | |
1087 | ||
1088 | Ideally, I think there should be another mechanism for fontifying | |
1089 | buffers without "modifying" buffers, or redisplay should be | |
1090 | smarter about updating the `*' in mode lines. --gerd */ | |
1091 | XSETBUFFER (buffer, current_buffer); | |
1092 | window = Fget_buffer_window (buffer, Qt); | |
1093 | if (WINDOWP (window)) | |
d57b83b3 GM |
1094 | { |
1095 | ++update_mode_lines; | |
1096 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
1097 | } | |
177c0ea7 | 1098 | |
1ab256cb RM |
1099 | return flag; |
1100 | } | |
1101 | ||
a8c21b48 GM |
1102 | DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p, |
1103 | Srestore_buffer_modified_p, 1, 1, 0, | |
42f47086 | 1104 | doc: /* Like `set-buffer-modified-p', with a difference concerning redisplay. |
018ba359 | 1105 | It is not ensured that mode lines will be updated to show the modified |
7ee72033 MB |
1106 | state of the current buffer. Use with care. */) |
1107 | (flag) | |
a8c21b48 GM |
1108 | Lisp_Object flag; |
1109 | { | |
1110 | #ifdef CLASH_DETECTION | |
1111 | Lisp_Object fn; | |
177c0ea7 | 1112 | |
a8c21b48 GM |
1113 | /* If buffer becoming modified, lock the file. |
1114 | If buffer becoming unmodified, unlock the file. */ | |
1115 | ||
1116 | fn = current_buffer->file_truename; | |
1117 | /* Test buffer-file-name so that binding it to nil is effective. */ | |
1118 | if (!NILP (fn) && ! NILP (current_buffer->filename)) | |
1119 | { | |
1120 | int already = SAVE_MODIFF < MODIFF; | |
1121 | if (!already && !NILP (flag)) | |
1122 | lock_file (fn); | |
1123 | else if (already && NILP (flag)) | |
1124 | unlock_file (fn); | |
1125 | } | |
1126 | #endif /* CLASH_DETECTION */ | |
177c0ea7 | 1127 | |
a8c21b48 GM |
1128 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
1129 | return flag; | |
1130 | } | |
1131 | ||
1ab256cb | 1132 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, |
efc7e75f | 1133 | 0, 1, 0, |
7ee72033 | 1134 | doc: /* Return BUFFER's tick counter, incremented for each change in text. |
2f064abf JB |
1135 | Each buffer has a tick counter which is incremented each time the |
1136 | text in that buffer is changed. It wraps around occasionally. | |
7ee72033 MB |
1137 | No argument or nil as argument means use current buffer as BUFFER. */) |
1138 | (buffer) | |
1ab256cb RM |
1139 | register Lisp_Object buffer; |
1140 | { | |
1141 | register struct buffer *buf; | |
265a9e55 | 1142 | if (NILP (buffer)) |
1ab256cb RM |
1143 | buf = current_buffer; |
1144 | else | |
1145 | { | |
b7826503 | 1146 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1147 | buf = XBUFFER (buffer); |
1148 | } | |
1149 | ||
1150 | return make_number (BUF_MODIFF (buf)); | |
1151 | } | |
3e145152 CY |
1152 | |
1153 | DEFUN ("buffer-chars-modified-tick", Fbuffer_chars_modified_tick, | |
1154 | Sbuffer_chars_modified_tick, 0, 1, 0, | |
1155 | doc: /* Return BUFFER's character-change tick counter. | |
1156 | Each buffer has a character-change tick counter, which is set to the | |
1157 | value of the buffer's tick counter \(see `buffer-modified-tick'), each | |
1158 | time text in that buffer is inserted or deleted. By comparing the | |
12bd42be | 1159 | values returned by two individual calls of `buffer-chars-modified-tick', |
3e145152 CY |
1160 | you can tell whether a character change occurred in that buffer in |
1161 | between these calls. No argument or nil as argument means use current | |
1162 | buffer as BUFFER. */) | |
1163 | (buffer) | |
1164 | register Lisp_Object buffer; | |
1165 | { | |
1166 | register struct buffer *buf; | |
1167 | if (NILP (buffer)) | |
1168 | buf = current_buffer; | |
1169 | else | |
1170 | { | |
1171 | CHECK_BUFFER (buffer); | |
1172 | buf = XBUFFER (buffer); | |
1173 | } | |
1174 | ||
1175 | return make_number (BUF_CHARS_MODIFF (buf)); | |
1176 | } | |
1ab256cb | 1177 | \f |
01050cb5 | 1178 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
4c7e5f09 | 1179 | "sRename buffer (to new name): \nP", |
7ee72033 | 1180 | doc: /* Change current buffer's name to NEWNAME (a string). |
018ba359 PJ |
1181 | If second arg UNIQUE is nil or omitted, it is an error if a |
1182 | buffer named NEWNAME already exists. | |
1183 | If UNIQUE is non-nil, come up with a new name using | |
1184 | `generate-new-buffer-name'. | |
1185 | Interactively, you can set UNIQUE with a prefix argument. | |
1186 | We return the name we actually gave the buffer. | |
7ee72033 MB |
1187 | This does not change the name of the visited file (if any). */) |
1188 | (newname, unique) | |
489c043a | 1189 | register Lisp_Object newname, unique; |
1ab256cb RM |
1190 | { |
1191 | register Lisp_Object tem, buf; | |
1192 | ||
b7826503 | 1193 | CHECK_STRING (newname); |
d59698c4 | 1194 | |
d5db4077 | 1195 | if (SCHARS (newname) == 0) |
d59698c4 RS |
1196 | error ("Empty string is invalid as a buffer name"); |
1197 | ||
489c043a | 1198 | tem = Fget_buffer (newname); |
265a9e55 | 1199 | if (!NILP (tem)) |
01050cb5 | 1200 | { |
8801a864 KR |
1201 | /* Don't short-circuit if UNIQUE is t. That is a useful way to |
1202 | rename the buffer automatically so you can create another | |
1203 | with the original name. It makes UNIQUE equivalent to | |
1204 | (rename-buffer (generate-new-buffer-name NEWNAME)). */ | |
1205 | if (NILP (unique) && XBUFFER (tem) == current_buffer) | |
1206 | return current_buffer->name; | |
3bd779aa | 1207 | if (!NILP (unique)) |
489c043a | 1208 | newname = Fgenerate_new_buffer_name (newname, current_buffer->name); |
01050cb5 | 1209 | else |
d5db4077 | 1210 | error ("Buffer name `%s' is in use", SDATA (newname)); |
01050cb5 | 1211 | } |
1ab256cb | 1212 | |
489c043a | 1213 | current_buffer->name = newname; |
76f590d7 JB |
1214 | |
1215 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
1216 | any windows displaying current_buffer will stay unchanged. */ | |
1217 | update_mode_lines++; | |
1218 | ||
67180c6a | 1219 | XSETBUFFER (buf, current_buffer); |
489c043a | 1220 | Fsetcar (Frassq (buf, Vbuffer_alist), newname); |
cf058e49 KH |
1221 | if (NILP (current_buffer->filename) |
1222 | && !NILP (current_buffer->auto_save_file_name)) | |
1ab256cb | 1223 | call0 (intern ("rename-auto-save-file")); |
fb5eba9c RS |
1224 | /* Refetch since that last call may have done GC. */ |
1225 | return current_buffer->name; | |
1ab256cb RM |
1226 | } |
1227 | ||
773fbdb9 | 1228 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 3, 0, |
7ee72033 | 1229 | doc: /* Return most recently selected buffer other than BUFFER. |
018ba359 PJ |
1230 | Buffers not visible in windows are preferred to visible buffers, |
1231 | unless optional second argument VISIBLE-OK is non-nil. | |
1232 | If the optional third argument FRAME is non-nil, use that frame's | |
1233 | buffer list instead of the selected frame's buffer list. | |
1234 | If no other buffer exists, the buffer `*scratch*' is returned. | |
7ee72033 MB |
1235 | If BUFFER is omitted or nil, some interesting buffer is returned. */) |
1236 | (buffer, visible_ok, frame) | |
773fbdb9 | 1237 | register Lisp_Object buffer, visible_ok, frame; |
1ab256cb | 1238 | { |
89132f25 | 1239 | Lisp_Object Fset_buffer_major_mode (); |
7962a441 | 1240 | register Lisp_Object tail, buf, notsogood, tem, pred, add_ons; |
1ab256cb RM |
1241 | notsogood = Qnil; |
1242 | ||
773fbdb9 | 1243 | if (NILP (frame)) |
9ba9623d | 1244 | frame = selected_frame; |
773fbdb9 | 1245 | |
7962a441 | 1246 | tail = Vbuffer_alist; |
773fbdb9 | 1247 | pred = frame_buffer_predicate (frame); |
7962a441 RS |
1248 | |
1249 | /* Consider buffers that have been seen in the selected frame | |
1250 | before other buffers. */ | |
177c0ea7 | 1251 | |
773fbdb9 | 1252 | tem = frame_buffer_list (frame); |
7962a441 RS |
1253 | add_ons = Qnil; |
1254 | while (CONSP (tem)) | |
1255 | { | |
7539e11f KR |
1256 | if (BUFFERP (XCAR (tem))) |
1257 | add_ons = Fcons (Fcons (Qnil, XCAR (tem)), add_ons); | |
1258 | tem = XCDR (tem); | |
7962a441 RS |
1259 | } |
1260 | tail = nconc2 (Fnreverse (add_ons), tail); | |
1261 | ||
6d70a280 | 1262 | for (; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1263 | { |
6d70a280 | 1264 | buf = Fcdr (XCAR (tail)); |
1ab256cb RM |
1265 | if (EQ (buf, buffer)) |
1266 | continue; | |
6b61353c KH |
1267 | if (NILP (buf)) |
1268 | continue; | |
1269 | if (NILP (XBUFFER (buf)->name)) | |
1270 | continue; | |
10ceceb8 | 1271 | if (SREF (XBUFFER (buf)->name, 0) == ' ') |
1ab256cb | 1272 | continue; |
04ae1b48 RS |
1273 | /* If the selected frame has a buffer_predicate, |
1274 | disregard buffers that don't fit the predicate. */ | |
7962a441 | 1275 | if (!NILP (pred)) |
04ae1b48 | 1276 | { |
7962a441 | 1277 | tem = call1 (pred, buf); |
04ae1b48 RS |
1278 | if (NILP (tem)) |
1279 | continue; | |
1280 | } | |
04ae1b48 | 1281 | |
a0ebb746 | 1282 | if (NILP (visible_ok)) |
66ffe51c | 1283 | tem = Fget_buffer_window (buf, Qvisible); |
a0ebb746 JB |
1284 | else |
1285 | tem = Qnil; | |
265a9e55 | 1286 | if (NILP (tem)) |
1ab256cb | 1287 | return buf; |
265a9e55 | 1288 | if (NILP (notsogood)) |
1ab256cb RM |
1289 | notsogood = buf; |
1290 | } | |
265a9e55 | 1291 | if (!NILP (notsogood)) |
1ab256cb | 1292 | return notsogood; |
dba1a30a GM |
1293 | buf = Fget_buffer (build_string ("*scratch*")); |
1294 | if (NILP (buf)) | |
1295 | { | |
1296 | buf = Fget_buffer_create (build_string ("*scratch*")); | |
1297 | Fset_buffer_major_mode (buf); | |
1298 | } | |
89132f25 | 1299 | return buf; |
1ab256cb RM |
1300 | } |
1301 | \f | |
1ab256cb RM |
1302 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, |
1303 | 0, 1, "", | |
7ee72033 MB |
1304 | doc: /* Start keeping undo information for buffer BUFFER. |
1305 | No argument or nil as argument means do this for the current buffer. */) | |
1306 | (buffer) | |
ffd56f97 | 1307 | register Lisp_Object buffer; |
1ab256cb | 1308 | { |
ffd56f97 | 1309 | Lisp_Object real_buffer; |
1ab256cb | 1310 | |
ffd56f97 | 1311 | if (NILP (buffer)) |
67180c6a | 1312 | XSETBUFFER (real_buffer, current_buffer); |
1ab256cb RM |
1313 | else |
1314 | { | |
ffd56f97 JB |
1315 | real_buffer = Fget_buffer (buffer); |
1316 | if (NILP (real_buffer)) | |
1317 | nsberror (buffer); | |
1ab256cb RM |
1318 | } |
1319 | ||
ffd56f97 JB |
1320 | if (EQ (XBUFFER (real_buffer)->undo_list, Qt)) |
1321 | XBUFFER (real_buffer)->undo_list = Qnil; | |
1ab256cb RM |
1322 | |
1323 | return Qnil; | |
1324 | } | |
1325 | ||
1326 | /* | |
1327 | DEFVAR_LISP ("kill-buffer-hook", no_cell, "\ | |
1328 | Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\ | |
1329 | The buffer being killed will be current while the hook is running.\n\ | |
1330 | See `kill-buffer'." | |
1331 | */ | |
1332 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 1, 1, "bKill buffer: ", | |
7ee72033 | 1333 | doc: /* Kill the buffer BUFFER. |
f6e22881 JB |
1334 | The argument may be a buffer or the name of a buffer. |
1335 | With a nil argument, kill the current buffer. | |
018ba359 | 1336 | |
f6e22881 | 1337 | Value is t if the buffer is actually killed, nil otherwise. |
018ba359 | 1338 | |
f6e22881 JB |
1339 | The functions in `kill-buffer-query-functions' are called with BUFFER as |
1340 | the current buffer. If any of them returns nil, the buffer is not killed. | |
1341 | ||
1342 | The hook `kill-buffer-hook' is run before the buffer is actually killed. | |
1343 | The buffer being killed will be current while the hook is running. | |
018ba359 PJ |
1344 | |
1345 | Any processes that have this buffer as the `process-buffer' are killed | |
7ee72033 MB |
1346 | with SIGHUP. */) |
1347 | (buffer) | |
a25f13ae | 1348 | Lisp_Object buffer; |
1ab256cb RM |
1349 | { |
1350 | Lisp_Object buf; | |
1351 | register struct buffer *b; | |
1352 | register Lisp_Object tem; | |
1353 | register struct Lisp_Marker *m; | |
6af718a4 | 1354 | struct gcpro gcpro1; |
1ab256cb | 1355 | |
a25f13ae | 1356 | if (NILP (buffer)) |
1ab256cb RM |
1357 | buf = Fcurrent_buffer (); |
1358 | else | |
a25f13ae | 1359 | buf = Fget_buffer (buffer); |
265a9e55 | 1360 | if (NILP (buf)) |
a25f13ae | 1361 | nsberror (buffer); |
1ab256cb RM |
1362 | |
1363 | b = XBUFFER (buf); | |
1364 | ||
4a4a9db5 KH |
1365 | /* Avoid trouble for buffer already dead. */ |
1366 | if (NILP (b->name)) | |
1367 | return Qnil; | |
1368 | ||
1ab256cb | 1369 | /* Query if the buffer is still modified. */ |
265a9e55 | 1370 | if (INTERACTIVE && !NILP (b->filename) |
336cd056 | 1371 | && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) |
1ab256cb | 1372 | { |
a25f13ae | 1373 | GCPRO1 (buf); |
5c4930b0 RS |
1374 | tem = do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ", |
1375 | b->name, make_number (0))); | |
1ab256cb | 1376 | UNGCPRO; |
265a9e55 | 1377 | if (NILP (tem)) |
1ab256cb RM |
1378 | return Qnil; |
1379 | } | |
1380 | ||
dcdffbf6 | 1381 | /* Run hooks with the buffer to be killed the current buffer. */ |
1ab256cb | 1382 | { |
aed13378 | 1383 | int count = SPECPDL_INDEX (); |
5b20caf0 | 1384 | Lisp_Object arglist[1]; |
1ab256cb RM |
1385 | |
1386 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1387 | set_buffer_internal (b); | |
dcdffbf6 RS |
1388 | |
1389 | /* First run the query functions; if any query is answered no, | |
1390 | don't kill the buffer. */ | |
5b20caf0 | 1391 | arglist[0] = Qkill_buffer_query_functions; |
09706e1f KR |
1392 | tem = Frun_hook_with_args_until_failure (1, arglist); |
1393 | if (NILP (tem)) | |
5b20caf0 | 1394 | return unbind_to (count, Qnil); |
dcdffbf6 RS |
1395 | |
1396 | /* Then run the hooks. */ | |
f1597a3a | 1397 | Frun_hooks (1, &Qkill_buffer_hook); |
1ab256cb RM |
1398 | unbind_to (count, Qnil); |
1399 | } | |
1400 | ||
1401 | /* We have no more questions to ask. Verify that it is valid | |
1402 | to kill the buffer. This must be done after the questions | |
1403 | since anything can happen within do_yes_or_no_p. */ | |
1404 | ||
1405 | /* Don't kill the minibuffer now current. */ | |
1406 | if (EQ (buf, XWINDOW (minibuf_window)->buffer)) | |
1407 | return Qnil; | |
1408 | ||
265a9e55 | 1409 | if (NILP (b->name)) |
1ab256cb RM |
1410 | return Qnil; |
1411 | ||
336cd056 RS |
1412 | /* When we kill a base buffer, kill all its indirect buffers. |
1413 | We do it at this stage so nothing terrible happens if they | |
1414 | ask questions or their hooks get errors. */ | |
1415 | if (! b->base_buffer) | |
1416 | { | |
1417 | struct buffer *other; | |
1418 | ||
1419 | GCPRO1 (buf); | |
1420 | ||
1421 | for (other = all_buffers; other; other = other->next) | |
4a4a9db5 KH |
1422 | /* all_buffers contains dead buffers too; |
1423 | don't re-kill them. */ | |
1424 | if (other->base_buffer == b && !NILP (other->name)) | |
336cd056 RS |
1425 | { |
1426 | Lisp_Object buf; | |
1427 | XSETBUFFER (buf, other); | |
1428 | Fkill_buffer (buf); | |
1429 | } | |
1430 | ||
1431 | UNGCPRO; | |
1432 | } | |
177c0ea7 | 1433 | |
1ab256cb RM |
1434 | /* Make this buffer not be current. |
1435 | In the process, notice if this is the sole visible buffer | |
1436 | and give up if so. */ | |
1437 | if (b == current_buffer) | |
1438 | { | |
773fbdb9 | 1439 | tem = Fother_buffer (buf, Qnil, Qnil); |
1ab256cb RM |
1440 | Fset_buffer (tem); |
1441 | if (b == current_buffer) | |
1442 | return Qnil; | |
1443 | } | |
1444 | ||
77270fac GM |
1445 | /* Notice if the buffer to kill is the sole visible buffer |
1446 | when we're currently in the mini-buffer, and give up if so. */ | |
1447 | XSETBUFFER (tem, current_buffer); | |
1448 | if (EQ (tem, XWINDOW (minibuf_window)->buffer)) | |
1449 | { | |
1450 | tem = Fother_buffer (buf, Qnil, Qnil); | |
77270fac GM |
1451 | if (EQ (buf, tem)) |
1452 | return Qnil; | |
1453 | } | |
1454 | ||
1ab256cb RM |
1455 | /* Now there is no question: we can kill the buffer. */ |
1456 | ||
1457 | #ifdef CLASH_DETECTION | |
1458 | /* Unlock this buffer's file, if it is locked. */ | |
1459 | unlock_buffer (b); | |
1460 | #endif /* CLASH_DETECTION */ | |
1461 | ||
49da74e6 | 1462 | GCPRO1 (buf); |
1ab256cb | 1463 | kill_buffer_processes (buf); |
49da74e6 KS |
1464 | UNGCPRO; |
1465 | ||
1466 | /* Killing buffer processes may run sentinels which may | |
1467 | have called kill-buffer. */ | |
1468 | ||
1469 | if (NILP (b->name)) | |
1470 | return Qnil; | |
1471 | ||
b93fb365 | 1472 | clear_charpos_cache (b); |
1ab256cb RM |
1473 | |
1474 | tem = Vinhibit_quit; | |
1475 | Vinhibit_quit = Qt; | |
00550f94 | 1476 | replace_buffer_in_all_windows (buf); |
b26dd9cb | 1477 | Vbuffer_alist = Fdelq (Frassq (buf, Vbuffer_alist), Vbuffer_alist); |
7962a441 | 1478 | frames_discard_buffer (buf); |
1ab256cb RM |
1479 | Vinhibit_quit = tem; |
1480 | ||
9cf712eb RS |
1481 | /* Delete any auto-save file, if we saved it in this session. |
1482 | But not if the buffer is modified. */ | |
a7a60ce9 | 1483 | if (STRINGP (b->auto_save_file_name) |
e95a0b39 | 1484 | && b->auto_save_modified != 0 |
9cf712eb | 1485 | && BUF_SAVE_MODIFF (b) < b->auto_save_modified |
6b61353c KH |
1486 | && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b) |
1487 | && NILP (Fsymbol_value (intern ("auto-save-visited-file-name")))) | |
1ab256cb RM |
1488 | { |
1489 | Lisp_Object tem; | |
1490 | tem = Fsymbol_value (intern ("delete-auto-save-files")); | |
265a9e55 | 1491 | if (! NILP (tem)) |
cbb6a418 | 1492 | internal_delete_file (b->auto_save_file_name); |
1ab256cb RM |
1493 | } |
1494 | ||
4a4a9db5 KH |
1495 | if (b->base_buffer) |
1496 | { | |
1497 | /* Unchain all markers that belong to this indirect buffer. | |
1498 | Don't unchain the markers that belong to the base buffer | |
1499 | or its other indirect buffers. */ | |
65745fad | 1500 | for (m = BUF_MARKERS (b); m; ) |
4a4a9db5 | 1501 | { |
65745fad | 1502 | struct Lisp_Marker *next = m->next; |
4a4a9db5 | 1503 | if (m->buffer == b) |
65745fad SM |
1504 | unchain_marker (m); |
1505 | m = next; | |
4a4a9db5 KH |
1506 | } |
1507 | } | |
1508 | else | |
1ab256cb | 1509 | { |
4a4a9db5 | 1510 | /* Unchain all markers of this buffer and its indirect buffers. |
336cd056 | 1511 | and leave them pointing nowhere. */ |
65745fad | 1512 | for (m = BUF_MARKERS (b); m; ) |
336cd056 | 1513 | { |
65745fad | 1514 | struct Lisp_Marker *next = m->next; |
336cd056 | 1515 | m->buffer = 0; |
65745fad SM |
1516 | m->next = NULL; |
1517 | m = next; | |
336cd056 | 1518 | } |
65745fad | 1519 | BUF_MARKERS (b) = NULL; |
336cd056 | 1520 | BUF_INTERVALS (b) = NULL_INTERVAL; |
336cd056 RS |
1521 | |
1522 | /* Perhaps we should explicitly free the interval tree here... */ | |
1523 | } | |
33f7013e | 1524 | |
2f3f993b RS |
1525 | /* Reset the local variables, so that this buffer's local values |
1526 | won't be protected from GC. They would be protected | |
1527 | if they happened to remain encached in their symbols. | |
1528 | This gets rid of them for certain. */ | |
1529 | swap_out_buffer_local_variables (b); | |
13de9290 | 1530 | reset_buffer_local_variables (b, 1); |
2f3f993b | 1531 | |
1ab256cb | 1532 | b->name = Qnil; |
336cd056 | 1533 | |
9ac0d9e0 | 1534 | BLOCK_INPUT; |
336cd056 | 1535 | if (! b->base_buffer) |
b86af064 | 1536 | free_buffer_text (b); |
336cd056 | 1537 | |
28e969dd JB |
1538 | if (b->newline_cache) |
1539 | { | |
1540 | free_region_cache (b->newline_cache); | |
1541 | b->newline_cache = 0; | |
1542 | } | |
1543 | if (b->width_run_cache) | |
1544 | { | |
1545 | free_region_cache (b->width_run_cache); | |
1546 | b->width_run_cache = 0; | |
1547 | } | |
1548 | b->width_table = Qnil; | |
9ac0d9e0 | 1549 | UNBLOCK_INPUT; |
1ab256cb RM |
1550 | b->undo_list = Qnil; |
1551 | ||
1552 | return Qt; | |
1553 | } | |
1554 | \f | |
36a8c287 JB |
1555 | /* Move the assoc for buffer BUF to the front of buffer-alist. Since |
1556 | we do this each time BUF is selected visibly, the more recently | |
1557 | selected buffers are always closer to the front of the list. This | |
1558 | means that other_buffer is more likely to choose a relevant buffer. */ | |
1ab256cb | 1559 | |
01136e9b | 1560 | void |
1ab256cb RM |
1561 | record_buffer (buf) |
1562 | Lisp_Object buf; | |
1563 | { | |
1564 | register Lisp_Object link, prev; | |
773fbdb9 | 1565 | Lisp_Object frame; |
9ba9623d | 1566 | frame = selected_frame; |
1ab256cb RM |
1567 | |
1568 | prev = Qnil; | |
7539e11f | 1569 | for (link = Vbuffer_alist; CONSP (link); link = XCDR (link)) |
1ab256cb | 1570 | { |
7539e11f | 1571 | if (EQ (XCDR (XCAR (link)), buf)) |
1ab256cb RM |
1572 | break; |
1573 | prev = link; | |
1574 | } | |
1575 | ||
36a8c287 JB |
1576 | /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist); |
1577 | we cannot use Fdelq itself here because it allows quitting. */ | |
1ab256cb | 1578 | |
265a9e55 | 1579 | if (NILP (prev)) |
7539e11f | 1580 | Vbuffer_alist = XCDR (Vbuffer_alist); |
1ab256cb | 1581 | else |
f3fbd155 | 1582 | XSETCDR (prev, XCDR (XCDR (prev))); |
177c0ea7 | 1583 | |
f3fbd155 | 1584 | XSETCDR (link, Vbuffer_alist); |
1ab256cb | 1585 | Vbuffer_alist = link; |
7962a441 RS |
1586 | |
1587 | /* Now move this buffer to the front of frame_buffer_list also. */ | |
1588 | ||
1589 | prev = Qnil; | |
773fbdb9 | 1590 | for (link = frame_buffer_list (frame); CONSP (link); |
7539e11f | 1591 | link = XCDR (link)) |
7962a441 | 1592 | { |
7539e11f | 1593 | if (EQ (XCAR (link), buf)) |
7962a441 RS |
1594 | break; |
1595 | prev = link; | |
1596 | } | |
1597 | ||
1598 | /* Effectively do delq. */ | |
1599 | ||
1600 | if (CONSP (link)) | |
1601 | { | |
1602 | if (NILP (prev)) | |
773fbdb9 | 1603 | set_frame_buffer_list (frame, |
7539e11f | 1604 | XCDR (frame_buffer_list (frame))); |
7962a441 | 1605 | else |
f3fbd155 | 1606 | XSETCDR (prev, XCDR (XCDR (prev))); |
177c0ea7 | 1607 | |
f3fbd155 | 1608 | XSETCDR (link, frame_buffer_list (frame)); |
773fbdb9 | 1609 | set_frame_buffer_list (frame, link); |
7962a441 RS |
1610 | } |
1611 | else | |
773fbdb9 | 1612 | set_frame_buffer_list (frame, Fcons (buf, frame_buffer_list (frame))); |
1ab256cb RM |
1613 | } |
1614 | ||
a9ee7a59 | 1615 | DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode, Sset_buffer_major_mode, 1, 1, 0, |
7ee72033 | 1616 | doc: /* Set an appropriate major mode for BUFFER. |
864b90c9 | 1617 | For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode |
71a0f2c6 | 1618 | according to `default-major-mode'. |
018ba359 | 1619 | Use this function before selecting the buffer, since it may need to inspect |
7ee72033 MB |
1620 | the current buffer's major mode. */) |
1621 | (buffer) | |
a2428fa2 | 1622 | Lisp_Object buffer; |
a9ee7a59 KH |
1623 | { |
1624 | int count; | |
1625 | Lisp_Object function; | |
1626 | ||
ea4fddd8 JB |
1627 | CHECK_BUFFER (buffer); |
1628 | ||
71a0f2c6 | 1629 | if (STRINGP (XBUFFER (buffer)->name) |
d5db4077 | 1630 | && strcmp (SDATA (XBUFFER (buffer)->name), "*scratch*") == 0) |
71a0f2c6 GM |
1631 | function = find_symbol_value (intern ("initial-major-mode")); |
1632 | else | |
1633 | { | |
1634 | function = buffer_defaults.major_mode; | |
1635 | if (NILP (function) | |
1636 | && NILP (Fget (current_buffer->major_mode, Qmode_class))) | |
1637 | function = current_buffer->major_mode; | |
1638 | } | |
177c0ea7 | 1639 | |
48265e61 DL |
1640 | if (NILP (function) || EQ (function, Qfundamental_mode)) |
1641 | return Qnil; | |
1642 | ||
aed13378 | 1643 | count = SPECPDL_INDEX (); |
a9ee7a59 | 1644 | |
48265e61 DL |
1645 | /* To select a nonfundamental mode, |
1646 | select the buffer temporarily and then call the mode function. */ | |
a9ee7a59 KH |
1647 | |
1648 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1649 | ||
a2428fa2 | 1650 | Fset_buffer (buffer); |
48265e61 | 1651 | call0 (function); |
a9ee7a59 KH |
1652 | |
1653 | return unbind_to (count, Qnil); | |
1654 | } | |
1655 | ||
2594e0fd RS |
1656 | /* If switching buffers in WINDOW would be an error, return |
1657 | a C string saying what the error would be. */ | |
1658 | ||
1659 | char * | |
1660 | no_switch_window (window) | |
1661 | Lisp_Object window; | |
1ab256cb | 1662 | { |
1ab256cb | 1663 | Lisp_Object tem; |
2594e0fd RS |
1664 | if (EQ (minibuf_window, window)) |
1665 | return "Cannot switch buffers in minibuffer window"; | |
1666 | tem = Fwindow_dedicated_p (window); | |
c01d0677 | 1667 | if (EQ (tem, Qt)) |
2594e0fd RS |
1668 | return "Cannot switch buffers in a dedicated window"; |
1669 | return NULL; | |
1670 | } | |
1671 | ||
1672 | /* Switch to buffer BUFFER in the selected window. | |
1673 | If NORECORD is non-nil, don't call record_buffer. */ | |
1674 | ||
1675 | Lisp_Object | |
1676 | switch_to_buffer_1 (buffer, norecord) | |
1677 | Lisp_Object buffer, norecord; | |
1678 | { | |
1679 | register Lisp_Object buf; | |
1ab256cb | 1680 | |
a25f13ae | 1681 | if (NILP (buffer)) |
773fbdb9 | 1682 | buf = Fother_buffer (Fcurrent_buffer (), Qnil, Qnil); |
1ab256cb | 1683 | else |
a9ee7a59 | 1684 | { |
a25f13ae | 1685 | buf = Fget_buffer (buffer); |
a9ee7a59 KH |
1686 | if (NILP (buf)) |
1687 | { | |
a25f13ae | 1688 | buf = Fget_buffer_create (buffer); |
a9ee7a59 KH |
1689 | Fset_buffer_major_mode (buf); |
1690 | } | |
1691 | } | |
1ab256cb | 1692 | Fset_buffer (buf); |
265a9e55 | 1693 | if (NILP (norecord)) |
1ab256cb RM |
1694 | record_buffer (buf); |
1695 | ||
1696 | Fset_window_buffer (EQ (selected_window, minibuf_window) | |
5fcd022d JB |
1697 | ? Fnext_window (minibuf_window, Qnil, Qnil) |
1698 | : selected_window, | |
2ad8731a | 1699 | buf, Qnil); |
1ab256cb | 1700 | |
cd0c235a | 1701 | return buf; |
1ab256cb RM |
1702 | } |
1703 | ||
2594e0fd | 1704 | DEFUN ("switch-to-buffer", Fswitch_to_buffer, Sswitch_to_buffer, 1, 2, "BSwitch to buffer: ", |
7ee72033 | 1705 | doc: /* Select buffer BUFFER in the current window. |
a6dced2a LT |
1706 | If BUFFER does not identify an existing buffer, |
1707 | then this function creates a buffer with that name. | |
1708 | ||
1709 | When called from Lisp, BUFFER may be a buffer, a string \(a buffer name), | |
1710 | or nil. If BUFFER is nil, then this function chooses a buffer | |
1711 | using `other-buffer'. | |
018ba359 PJ |
1712 | Optional second arg NORECORD non-nil means |
1713 | do not put this buffer at the front of the list of recently selected ones. | |
a6dced2a | 1714 | This function returns the buffer it switched to. |
018ba359 PJ |
1715 | |
1716 | WARNING: This is NOT the way to work on another buffer temporarily | |
1717 | within a Lisp program! Use `set-buffer' instead. That avoids messing with | |
7ee72033 MB |
1718 | the window-buffer correspondences. */) |
1719 | (buffer, norecord) | |
2594e0fd RS |
1720 | Lisp_Object buffer, norecord; |
1721 | { | |
1722 | char *err; | |
1723 | ||
27c6b98e | 1724 | if (EQ (buffer, Fwindow_buffer (selected_window))) |
fab45703 | 1725 | { |
611ac521 RS |
1726 | /* Basically a NOP. Avoid signalling an error in the case where |
1727 | the selected window is dedicated, or a minibuffer. */ | |
1728 | ||
1729 | /* But do put this buffer at the front of the buffer list, | |
1730 | unless that has been inhibited. Note that even if | |
1731 | BUFFER is at the front of the main buffer-list already, | |
1732 | we still want to move it to the front of the frame's buffer list. */ | |
1733 | if (NILP (norecord)) | |
fab45703 | 1734 | record_buffer (buffer); |
fab45703 NR |
1735 | return Fset_buffer (buffer); |
1736 | } | |
27c6b98e | 1737 | |
2594e0fd RS |
1738 | err = no_switch_window (selected_window); |
1739 | if (err) error (err); | |
1740 | ||
1741 | return switch_to_buffer_1 (buffer, norecord); | |
1742 | } | |
1743 | ||
cd0c235a | 1744 | DEFUN ("pop-to-buffer", Fpop_to_buffer, Spop_to_buffer, 1, 3, 0, |
7ee72033 | 1745 | doc: /* Select buffer BUFFER in some window, preferably a different one. |
a6dced2a LT |
1746 | BUFFER may be a buffer, a string \(a buffer name), or nil. |
1747 | If BUFFER is a string which is not the name of an existing buffer, | |
1748 | then this function creates a buffer with that name. | |
1749 | If BUFFER is nil, then it chooses some other buffer. | |
018ba359 | 1750 | If `pop-up-windows' is non-nil, windows can be split to do this. |
e198ba87 | 1751 | If optional second arg OTHER-WINDOW is non-nil, insist on finding another |
6b61353c KH |
1752 | window even if BUFFER is already visible in the selected window, |
1753 | and ignore `same-window-regexps' and `same-window-buffer-names'. | |
a6dced2a | 1754 | This function returns the buffer it switched to. |
018ba359 PJ |
1755 | This uses the function `display-buffer' as a subroutine; see the documentation |
1756 | of `display-buffer' for additional customization information. | |
1757 | ||
1758 | Optional third arg NORECORD non-nil means | |
7ee72033 MB |
1759 | do not put this buffer at the front of the list of recently selected ones. */) |
1760 | (buffer, other_window, norecord) | |
6d12711f | 1761 | Lisp_Object buffer, other_window, norecord; |
1ab256cb RM |
1762 | { |
1763 | register Lisp_Object buf; | |
a25f13ae | 1764 | if (NILP (buffer)) |
773fbdb9 | 1765 | buf = Fother_buffer (Fcurrent_buffer (), Qnil, Qnil); |
1ab256cb | 1766 | else |
7c2087ee | 1767 | { |
a25f13ae | 1768 | buf = Fget_buffer (buffer); |
7c2087ee RS |
1769 | if (NILP (buf)) |
1770 | { | |
a25f13ae | 1771 | buf = Fget_buffer_create (buffer); |
7c2087ee RS |
1772 | Fset_buffer_major_mode (buf); |
1773 | } | |
1774 | } | |
1ab256cb | 1775 | Fset_buffer (buf); |
f1321dc3 | 1776 | Fselect_window (Fdisplay_buffer (buf, other_window, Qnil), norecord); |
e8b3a22d | 1777 | return buf; |
1ab256cb RM |
1778 | } |
1779 | ||
1780 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, | |
7ee72033 MB |
1781 | doc: /* Return the current buffer as a Lisp object. */) |
1782 | () | |
1ab256cb RM |
1783 | { |
1784 | register Lisp_Object buf; | |
67180c6a | 1785 | XSETBUFFER (buf, current_buffer); |
1ab256cb RM |
1786 | return buf; |
1787 | } | |
1788 | \f | |
7ec44ec6 GM |
1789 | /* Set the current buffer to B. |
1790 | ||
1791 | We previously set windows_or_buffers_changed here to invalidate | |
1792 | global unchanged information in beg_unchanged and end_unchanged. | |
1793 | This is no longer necessary because we now compute unchanged | |
1794 | information on a buffer-basis. Every action affecting other | |
1795 | windows than the selected one requires a select_window at some | |
1796 | time, and that increments windows_or_buffers_changed. */ | |
1ab256cb RM |
1797 | |
1798 | void | |
1799 | set_buffer_internal (b) | |
1800 | register struct buffer *b; | |
1801 | { | |
b5a225b4 | 1802 | if (current_buffer != b) |
7ec44ec6 | 1803 | set_buffer_internal_1 (b); |
c7aa5005 KH |
1804 | } |
1805 | ||
1806 | /* Set the current buffer to B, and do not set windows_or_buffers_changed. | |
1807 | This is used by redisplay. */ | |
1808 | ||
1809 | void | |
1810 | set_buffer_internal_1 (b) | |
1811 | register struct buffer *b; | |
1812 | { | |
1813 | register struct buffer *old_buf; | |
1814 | register Lisp_Object tail, valcontents; | |
1815 | Lisp_Object tem; | |
1816 | ||
b86af064 | 1817 | #ifdef USE_MMAP_FOR_BUFFERS |
684b01ee | 1818 | if (b->text->beg == NULL) |
b86af064 GM |
1819 | enlarge_buffer_text (b, 0); |
1820 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
177c0ea7 | 1821 | |
c7aa5005 KH |
1822 | if (current_buffer == b) |
1823 | return; | |
1824 | ||
1ab256cb RM |
1825 | old_buf = current_buffer; |
1826 | current_buffer = b; | |
1827 | last_known_column_point = -1; /* invalidate indentation cache */ | |
1828 | ||
336cd056 RS |
1829 | if (old_buf) |
1830 | { | |
1831 | /* Put the undo list back in the base buffer, so that it appears | |
1832 | that an indirect buffer shares the undo list of its base. */ | |
1833 | if (old_buf->base_buffer) | |
1834 | old_buf->base_buffer->undo_list = old_buf->undo_list; | |
1835 | ||
1836 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1837 | when it is not current, update them now. */ | |
1838 | if (! NILP (old_buf->pt_marker)) | |
1839 | { | |
1840 | Lisp_Object obuf; | |
1841 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1842 | set_marker_both (old_buf->pt_marker, obuf, |
1843 | BUF_PT (old_buf), BUF_PT_BYTE (old_buf)); | |
336cd056 RS |
1844 | } |
1845 | if (! NILP (old_buf->begv_marker)) | |
1846 | { | |
1847 | Lisp_Object obuf; | |
1848 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1849 | set_marker_both (old_buf->begv_marker, obuf, |
1850 | BUF_BEGV (old_buf), BUF_BEGV_BYTE (old_buf)); | |
336cd056 RS |
1851 | } |
1852 | if (! NILP (old_buf->zv_marker)) | |
1853 | { | |
1854 | Lisp_Object obuf; | |
1855 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1856 | set_marker_both (old_buf->zv_marker, obuf, |
1857 | BUF_ZV (old_buf), BUF_ZV_BYTE (old_buf)); | |
336cd056 RS |
1858 | } |
1859 | } | |
1860 | ||
1861 | /* Get the undo list from the base buffer, so that it appears | |
1862 | that an indirect buffer shares the undo list of its base. */ | |
1863 | if (b->base_buffer) | |
1864 | b->undo_list = b->base_buffer->undo_list; | |
1865 | ||
1866 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1867 | when it is not current, fetch them now. */ | |
1868 | if (! NILP (b->pt_marker)) | |
3f236a40 RS |
1869 | { |
1870 | BUF_PT (b) = marker_position (b->pt_marker); | |
1871 | BUF_PT_BYTE (b) = marker_byte_position (b->pt_marker); | |
1872 | } | |
336cd056 | 1873 | if (! NILP (b->begv_marker)) |
3f236a40 RS |
1874 | { |
1875 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1876 | BUF_BEGV_BYTE (b) = marker_byte_position (b->begv_marker); | |
1877 | } | |
336cd056 | 1878 | if (! NILP (b->zv_marker)) |
3f236a40 RS |
1879 | { |
1880 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1881 | BUF_ZV_BYTE (b) = marker_byte_position (b->zv_marker); | |
1882 | } | |
336cd056 | 1883 | |
1ab256cb RM |
1884 | /* Look down buffer's list of local Lisp variables |
1885 | to find and update any that forward into C variables. */ | |
1886 | ||
65745fad | 1887 | for (tail = b->local_var_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1888 | { |
f5c1dd0d | 1889 | valcontents = SYMBOL_VALUE (XCAR (XCAR (tail))); |
a7a60ce9 KH |
1890 | if ((BUFFER_LOCAL_VALUEP (valcontents) |
1891 | || SOME_BUFFER_LOCAL_VALUEP (valcontents)) | |
3d871c85 | 1892 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->realvalue, |
a7a60ce9 | 1893 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
1ab256cb RM |
1894 | /* Just reference the variable |
1895 | to cause it to become set for this buffer. */ | |
7539e11f | 1896 | Fsymbol_value (XCAR (XCAR (tail))); |
1ab256cb RM |
1897 | } |
1898 | ||
1899 | /* Do the same with any others that were local to the previous buffer */ | |
1900 | ||
1901 | if (old_buf) | |
65745fad | 1902 | for (tail = old_buf->local_var_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1903 | { |
f5c1dd0d | 1904 | valcontents = SYMBOL_VALUE (XCAR (XCAR (tail))); |
a7a60ce9 KH |
1905 | if ((BUFFER_LOCAL_VALUEP (valcontents) |
1906 | || SOME_BUFFER_LOCAL_VALUEP (valcontents)) | |
3d871c85 | 1907 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->realvalue, |
a7a60ce9 | 1908 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
1ab256cb RM |
1909 | /* Just reference the variable |
1910 | to cause it to become set for this buffer. */ | |
7539e11f | 1911 | Fsymbol_value (XCAR (XCAR (tail))); |
1ab256cb RM |
1912 | } |
1913 | } | |
1914 | ||
336cd056 | 1915 | /* Switch to buffer B temporarily for redisplay purposes. |
bbbe9545 | 1916 | This avoids certain things that don't need to be done within redisplay. */ |
336cd056 RS |
1917 | |
1918 | void | |
1919 | set_buffer_temp (b) | |
1920 | struct buffer *b; | |
1921 | { | |
1922 | register struct buffer *old_buf; | |
1923 | ||
1924 | if (current_buffer == b) | |
1925 | return; | |
1926 | ||
1927 | old_buf = current_buffer; | |
1928 | current_buffer = b; | |
1929 | ||
1930 | if (old_buf) | |
1931 | { | |
1932 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1933 | when it is not current, update them now. */ | |
1934 | if (! NILP (old_buf->pt_marker)) | |
1935 | { | |
1936 | Lisp_Object obuf; | |
1937 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1938 | set_marker_both (old_buf->pt_marker, obuf, |
1939 | BUF_PT (old_buf), BUF_PT_BYTE (old_buf)); | |
336cd056 RS |
1940 | } |
1941 | if (! NILP (old_buf->begv_marker)) | |
1942 | { | |
1943 | Lisp_Object obuf; | |
1944 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1945 | set_marker_both (old_buf->begv_marker, obuf, |
1946 | BUF_BEGV (old_buf), BUF_BEGV_BYTE (old_buf)); | |
336cd056 RS |
1947 | } |
1948 | if (! NILP (old_buf->zv_marker)) | |
1949 | { | |
1950 | Lisp_Object obuf; | |
1951 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1952 | set_marker_both (old_buf->zv_marker, obuf, |
1953 | BUF_ZV (old_buf), BUF_ZV_BYTE (old_buf)); | |
336cd056 RS |
1954 | } |
1955 | } | |
1956 | ||
1957 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1958 | when it is not current, fetch them now. */ | |
1959 | if (! NILP (b->pt_marker)) | |
3f236a40 RS |
1960 | { |
1961 | BUF_PT (b) = marker_position (b->pt_marker); | |
1962 | BUF_PT_BYTE (b) = marker_byte_position (b->pt_marker); | |
1963 | } | |
336cd056 | 1964 | if (! NILP (b->begv_marker)) |
3f236a40 RS |
1965 | { |
1966 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1967 | BUF_BEGV_BYTE (b) = marker_byte_position (b->begv_marker); | |
1968 | } | |
336cd056 | 1969 | if (! NILP (b->zv_marker)) |
3f236a40 RS |
1970 | { |
1971 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1972 | BUF_ZV_BYTE (b) = marker_byte_position (b->zv_marker); | |
1973 | } | |
336cd056 RS |
1974 | } |
1975 | ||
1ab256cb | 1976 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, |
7ee72033 | 1977 | doc: /* Make the buffer BUFFER current for editing operations. |
018ba359 PJ |
1978 | BUFFER may be a buffer or the name of an existing buffer. |
1979 | See also `save-excursion' when you want to make a buffer current temporarily. | |
1980 | This function does not display the buffer, so its effect ends | |
1981 | when the current command terminates. | |
7ee72033 MB |
1982 | Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently. */) |
1983 | (buffer) | |
a25f13ae | 1984 | register Lisp_Object buffer; |
1ab256cb | 1985 | { |
a25f13ae KH |
1986 | register Lisp_Object buf; |
1987 | buf = Fget_buffer (buffer); | |
1988 | if (NILP (buf)) | |
1989 | nsberror (buffer); | |
1990 | if (NILP (XBUFFER (buf)->name)) | |
1ab256cb | 1991 | error ("Selecting deleted buffer"); |
a25f13ae KH |
1992 | set_buffer_internal (XBUFFER (buf)); |
1993 | return buf; | |
1ab256cb | 1994 | } |
d0628b06 RS |
1995 | |
1996 | /* Set the current buffer to BUFFER provided it is alive. */ | |
1997 | ||
1998 | Lisp_Object | |
1999 | set_buffer_if_live (buffer) | |
2000 | Lisp_Object buffer; | |
2001 | { | |
2002 | if (! NILP (XBUFFER (buffer)->name)) | |
2003 | Fset_buffer (buffer); | |
2004 | return Qnil; | |
2005 | } | |
1ab256cb RM |
2006 | \f |
2007 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, | |
2008 | Sbarf_if_buffer_read_only, 0, 0, 0, | |
7ee72033 MB |
2009 | doc: /* Signal a `buffer-read-only' error if the current buffer is read-only. */) |
2010 | () | |
1ab256cb | 2011 | { |
a96b68f1 RS |
2012 | if (!NILP (current_buffer->read_only) |
2013 | && NILP (Vinhibit_read_only)) | |
4c4dc0b0 | 2014 | xsignal1 (Qbuffer_read_only, Fcurrent_buffer ()); |
1ab256cb RM |
2015 | return Qnil; |
2016 | } | |
2017 | ||
2018 | DEFUN ("bury-buffer", Fbury_buffer, Sbury_buffer, 0, 1, "", | |
7ee72033 | 2019 | doc: /* Put BUFFER at the end of the list of all buffers. |
018ba359 PJ |
2020 | There it is the least likely candidate for `other-buffer' to return; |
2021 | thus, the least likely buffer for \\[switch-to-buffer] to select by default. | |
39971188 | 2022 | You can specify a buffer name as BUFFER, or an actual buffer object. |
018ba359 PJ |
2023 | If BUFFER is nil or omitted, bury the current buffer. |
2024 | Also, if BUFFER is nil or omitted, remove the current buffer from the | |
7ee72033 MB |
2025 | selected window if it is displayed there. */) |
2026 | (buffer) | |
a2428fa2 | 2027 | register Lisp_Object buffer; |
1ab256cb | 2028 | { |
b271272a | 2029 | /* Figure out what buffer we're going to bury. */ |
a2428fa2 | 2030 | if (NILP (buffer)) |
a5611885 | 2031 | { |
c58dab63 | 2032 | Lisp_Object tem; |
a2428fa2 | 2033 | XSETBUFFER (buffer, current_buffer); |
0a63b212 | 2034 | |
c58dab63 | 2035 | tem = Fwindow_buffer (selected_window); |
0a63b212 | 2036 | /* If we're burying the current buffer, unshow it. */ |
c58dab63 | 2037 | if (EQ (buffer, tem)) |
a78e0303 PJ |
2038 | { |
2039 | if (NILP (Fwindow_dedicated_p (selected_window))) | |
2040 | Fswitch_to_buffer (Fother_buffer (buffer, Qnil, Qnil), Qnil); | |
2041 | else if (NILP (XWINDOW (selected_window)->parent)) | |
2042 | Ficonify_frame (Fwindow_frame (selected_window)); | |
2043 | else | |
2044 | Fdelete_window (selected_window); | |
2045 | } | |
a5611885 | 2046 | } |
1ab256cb RM |
2047 | else |
2048 | { | |
2049 | Lisp_Object buf1; | |
177c0ea7 | 2050 | |
a2428fa2 | 2051 | buf1 = Fget_buffer (buffer); |
265a9e55 | 2052 | if (NILP (buf1)) |
a2428fa2 EN |
2053 | nsberror (buffer); |
2054 | buffer = buf1; | |
b271272a JB |
2055 | } |
2056 | ||
a1a8b28e GM |
2057 | /* Move buffer to the end of the buffer list. Do nothing if the |
2058 | buffer is killed. */ | |
2059 | if (!NILP (XBUFFER (buffer)->name)) | |
2060 | { | |
2061 | Lisp_Object aelt, link; | |
b271272a | 2062 | |
a1a8b28e GM |
2063 | aelt = Frassq (buffer, Vbuffer_alist); |
2064 | link = Fmemq (aelt, Vbuffer_alist); | |
2065 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); | |
f3fbd155 | 2066 | XSETCDR (link, Qnil); |
a1a8b28e | 2067 | Vbuffer_alist = nconc2 (Vbuffer_alist, link); |
1ab256cb | 2068 | |
6c488ddb RS |
2069 | /* Removing BUFFER from frame-specific lists |
2070 | has the effect of putting BUFFER at the end | |
2071 | of the combined list in each frame. */ | |
2072 | frames_discard_buffer (buffer); | |
a1a8b28e | 2073 | } |
dec989eb | 2074 | |
1ab256cb RM |
2075 | return Qnil; |
2076 | } | |
2077 | \f | |
c922bc55 | 2078 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
7ee72033 | 2079 | doc: /* Delete the entire contents of the current buffer. |
018ba359 | 2080 | Any narrowing restriction in effect (see `narrow-to-region') is removed, |
7ee72033 MB |
2081 | so the buffer is truly empty after this. */) |
2082 | () | |
1ab256cb RM |
2083 | { |
2084 | Fwiden (); | |
c0d9a0c3 GM |
2085 | |
2086 | del_range (BEG, Z); | |
c280bc6a | 2087 | |
1ab256cb RM |
2088 | current_buffer->last_window_start = 1; |
2089 | /* Prevent warnings, or suspension of auto saving, that would happen | |
2090 | if future size is less than past size. Use of erase-buffer | |
2091 | implies that the future text is not really related to the past text. */ | |
8d7a4592 | 2092 | XSETFASTINT (current_buffer->save_length, 0); |
1ab256cb RM |
2093 | return Qnil; |
2094 | } | |
2095 | ||
01136e9b | 2096 | void |
1ab256cb RM |
2097 | validate_region (b, e) |
2098 | register Lisp_Object *b, *e; | |
2099 | { | |
b7826503 PJ |
2100 | CHECK_NUMBER_COERCE_MARKER (*b); |
2101 | CHECK_NUMBER_COERCE_MARKER (*e); | |
1ab256cb RM |
2102 | |
2103 | if (XINT (*b) > XINT (*e)) | |
2104 | { | |
03192067 KH |
2105 | Lisp_Object tem; |
2106 | tem = *b; *b = *e; *e = tem; | |
1ab256cb RM |
2107 | } |
2108 | ||
2109 | if (!(BEGV <= XINT (*b) && XINT (*b) <= XINT (*e) | |
2110 | && XINT (*e) <= ZV)) | |
2111 | args_out_of_range (*b, *e); | |
2112 | } | |
2113 | \f | |
b05525fa RS |
2114 | /* Advance BYTE_POS up to a character boundary |
2115 | and return the adjusted position. */ | |
2116 | ||
2117 | static int | |
2118 | advance_to_char_boundary (byte_pos) | |
2119 | int byte_pos; | |
2120 | { | |
f8449323 | 2121 | int c; |
b05525fa | 2122 | |
f8449323 RS |
2123 | if (byte_pos == BEG) |
2124 | /* Beginning of buffer is always a character boundary. */ | |
6d70a280 | 2125 | return BEG; |
f8449323 RS |
2126 | |
2127 | c = FETCH_BYTE (byte_pos); | |
2128 | if (! CHAR_HEAD_P (c)) | |
b05525fa | 2129 | { |
1be6387d | 2130 | /* We should advance BYTE_POS only when C is a constituent of a |
f8449323 | 2131 | multibyte sequence. */ |
a9bcded1 KH |
2132 | int orig_byte_pos = byte_pos; |
2133 | ||
2134 | do | |
2135 | { | |
2136 | byte_pos--; | |
2137 | c = FETCH_BYTE (byte_pos); | |
2138 | } | |
2139 | while (! CHAR_HEAD_P (c) && byte_pos > BEG); | |
f8449323 | 2140 | INC_POS (byte_pos); |
a9bcded1 KH |
2141 | if (byte_pos < orig_byte_pos) |
2142 | byte_pos = orig_byte_pos; | |
f8449323 RS |
2143 | /* If C is a constituent of a multibyte sequence, BYTE_POS was |
2144 | surely advance to the correct character boundary. If C is | |
2145 | not, BYTE_POS was unchanged. */ | |
b05525fa RS |
2146 | } |
2147 | ||
20773569 | 2148 | return byte_pos; |
b05525fa RS |
2149 | } |
2150 | ||
3ac81adb RS |
2151 | DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte, Sset_buffer_multibyte, |
2152 | 1, 1, 0, | |
7ee72033 | 2153 | doc: /* Set the multibyte flag of the current buffer to FLAG. |
018ba359 PJ |
2154 | If FLAG is t, this makes the buffer a multibyte buffer. |
2155 | If FLAG is nil, this makes the buffer a single-byte buffer. | |
8f924df7 KH |
2156 | In these cases, the buffer contents remain unchanged as a sequence of |
2157 | bytes but the contents viewed as characters do change. | |
2158 | If FLAG is `to', this makes the buffer a multibyte buffer by changing | |
6b61353c KH |
2159 | all eight-bit bytes to eight-bit characters. |
2160 | If the multibyte flag was really changed, undo information of the | |
2161 | current buffer is cleared. */) | |
7ee72033 | 2162 | (flag) |
3ac81adb RS |
2163 | Lisp_Object flag; |
2164 | { | |
65745fad | 2165 | struct Lisp_Marker *tail, *markers; |
abc9d959 | 2166 | struct buffer *other; |
458c8af4 | 2167 | int begv, zv; |
8d1203ea | 2168 | int narrowed = (BEG != BEGV || Z != ZV); |
ed00559d | 2169 | int modified_p = !NILP (Fbuffer_modified_p (Qnil)); |
38babc07 KS |
2170 | Lisp_Object old_undo = current_buffer->undo_list; |
2171 | struct gcpro gcpro1; | |
3ac81adb | 2172 | |
6e553d5e RS |
2173 | if (current_buffer->base_buffer) |
2174 | error ("Cannot do `set-buffer-multibyte' on an indirect buffer"); | |
2175 | ||
70e77119 AS |
2176 | /* Do nothing if nothing actually changes. */ |
2177 | if (NILP (flag) == NILP (current_buffer->enable_multibyte_characters)) | |
2178 | return flag; | |
2179 | ||
38babc07 KS |
2180 | GCPRO1 (old_undo); |
2181 | ||
2182 | /* Don't record these buffer changes. We will put a special undo entry | |
2183 | instead. */ | |
2184 | current_buffer->undo_list = Qt; | |
b05525fa | 2185 | |
3ac81adb RS |
2186 | /* If the cached position is for this buffer, clear it out. */ |
2187 | clear_charpos_cache (current_buffer); | |
2188 | ||
458c8af4 KH |
2189 | if (NILP (flag)) |
2190 | begv = BEGV_BYTE, zv = ZV_BYTE; | |
2191 | else | |
2192 | begv = BEGV, zv = ZV; | |
2193 | ||
a9bcded1 KH |
2194 | if (narrowed) |
2195 | Fwiden (); | |
2196 | ||
3ac81adb RS |
2197 | if (NILP (flag)) |
2198 | { | |
a9bcded1 KH |
2199 | int pos, stop; |
2200 | unsigned char *p; | |
2201 | ||
3ac81adb RS |
2202 | /* Do this first, so it can use CHAR_TO_BYTE |
2203 | to calculate the old correspondences. */ | |
2204 | set_intervals_multibyte (0); | |
2205 | ||
2206 | current_buffer->enable_multibyte_characters = Qnil; | |
2207 | ||
2208 | Z = Z_BYTE; | |
2209 | BEGV = BEGV_BYTE; | |
2210 | ZV = ZV_BYTE; | |
2211 | GPT = GPT_BYTE; | |
2212 | TEMP_SET_PT_BOTH (PT_BYTE, PT_BYTE); | |
2213 | ||
60ebfdf3 | 2214 | |
65745fad SM |
2215 | for (tail = BUF_MARKERS (current_buffer); tail; tail = tail->next) |
2216 | tail->charpos = tail->bytepos; | |
a9bcded1 KH |
2217 | |
2218 | /* Convert multibyte form of 8-bit characters to unibyte. */ | |
2219 | pos = BEG; | |
2220 | stop = GPT; | |
2221 | p = BEG_ADDR; | |
2222 | while (1) | |
2223 | { | |
2224 | int c, bytes; | |
2225 | ||
2226 | if (pos == stop) | |
2227 | { | |
2228 | if (pos == Z) | |
2229 | break; | |
2230 | p = GAP_END_ADDR; | |
2231 | stop = Z; | |
2232 | } | |
8f348ed5 KH |
2233 | if (ASCII_BYTE_P (*p)) |
2234 | p++, pos++; | |
2235 | else if (CHAR_BYTE8_HEAD_P (*p)) | |
a9bcded1 | 2236 | { |
31285a8f | 2237 | c = STRING_CHAR_AND_LENGTH (p, stop - pos, bytes); |
a9bcded1 KH |
2238 | /* Delete all bytes for this 8-bit character but the |
2239 | last one, and change the last one to the charcter | |
2240 | code. */ | |
2241 | bytes--; | |
2242 | del_range_2 (pos, pos, pos + bytes, pos + bytes, 0); | |
2243 | p = GAP_END_ADDR; | |
2244 | *p++ = c; | |
2245 | pos++; | |
2246 | if (begv > pos) | |
2247 | begv -= bytes; | |
2248 | if (zv > pos) | |
2249 | zv -= bytes; | |
2250 | stop = Z; | |
2251 | } | |
8f924df7 | 2252 | else |
8f348ed5 KH |
2253 | { |
2254 | bytes = BYTES_BY_CHAR_HEAD (*p); | |
2255 | p += bytes, pos += bytes; | |
2256 | } | |
a9bcded1 KH |
2257 | } |
2258 | if (narrowed) | |
2259 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
3ac81adb RS |
2260 | } |
2261 | else | |
2262 | { | |
a9bcded1 KH |
2263 | int pt = PT; |
2264 | int pos, stop; | |
8f348ed5 | 2265 | unsigned char *p, *pend; |
a9bcded1 | 2266 | |
673c57d2 | 2267 | /* Be sure not to have a multibyte sequence striding over the GAP. |
8f348ed5 KH |
2268 | Ex: We change this: "...abc\302 _GAP_ \241def..." |
2269 | to: "...abc _GAP_ \302\241def..." */ | |
673c57d2 | 2270 | |
8f924df7 | 2271 | if (EQ (flag, Qt) |
a3a303df | 2272 | && GPT_BYTE > 1 && GPT_BYTE < Z_BYTE |
673c57d2 KH |
2273 | && ! CHAR_HEAD_P (*(GAP_END_ADDR))) |
2274 | { | |
2275 | unsigned char *p = GPT_ADDR - 1; | |
2276 | ||
2277 | while (! CHAR_HEAD_P (*p) && p > BEG_ADDR) p--; | |
2278 | if (BASE_LEADING_CODE_P (*p)) | |
2279 | { | |
2280 | int new_gpt = GPT_BYTE - (GPT_ADDR - p); | |
2281 | ||
2282 | move_gap_both (new_gpt, new_gpt); | |
2283 | } | |
2284 | } | |
2285 | ||
a9bcded1 KH |
2286 | /* Make the buffer contents valid as multibyte by converting |
2287 | 8-bit characters to multibyte form. */ | |
2288 | pos = BEG; | |
2289 | stop = GPT; | |
2290 | p = BEG_ADDR; | |
8f348ed5 | 2291 | pend = GPT_ADDR; |
a9bcded1 KH |
2292 | while (1) |
2293 | { | |
2294 | int bytes; | |
2295 | ||
2296 | if (pos == stop) | |
2297 | { | |
2298 | if (pos == Z) | |
2299 | break; | |
2300 | p = GAP_END_ADDR; | |
8f348ed5 | 2301 | pend = Z_ADDR; |
a9bcded1 KH |
2302 | stop = Z; |
2303 | } | |
177c0ea7 | 2304 | |
a3a303df KH |
2305 | if (ASCII_BYTE_P (*p)) |
2306 | p++, pos++; | |
8f924df7 | 2307 | else if (EQ (flag, Qt) && (bytes = MULTIBYTE_LENGTH (p, pend)) > 0) |
a9bcded1 KH |
2308 | p += bytes, pos += bytes; |
2309 | else | |
2310 | { | |
2311 | unsigned char tmp[MAX_MULTIBYTE_LENGTH]; | |
a3a303df | 2312 | int c; |
a9bcded1 | 2313 | |
8f924df7 | 2314 | c = BYTE8_TO_CHAR (*p); |
8c2fc311 | 2315 | bytes = CHAR_STRING (c, tmp); |
a9bcded1 KH |
2316 | *p = tmp[0]; |
2317 | TEMP_SET_PT_BOTH (pos + 1, pos + 1); | |
2318 | bytes--; | |
2319 | insert_1_both (tmp + 1, bytes, bytes, 1, 0, 0); | |
2320 | /* Now the gap is after the just inserted data. */ | |
2321 | pos = GPT; | |
2322 | p = GAP_END_ADDR; | |
2323 | if (pos <= begv) | |
2324 | begv += bytes; | |
2325 | if (pos <= zv) | |
2326 | zv += bytes; | |
2327 | if (pos <= pt) | |
2328 | pt += bytes; | |
31285a8f | 2329 | pend = Z_ADDR; |
a9bcded1 KH |
2330 | stop = Z; |
2331 | } | |
2332 | } | |
2333 | ||
2334 | if (pt != PT) | |
2335 | TEMP_SET_PT (pt); | |
2336 | ||
2337 | if (narrowed) | |
2338 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
2339 | ||
3ac81adb RS |
2340 | /* Do this first, so that chars_in_text asks the right question. |
2341 | set_intervals_multibyte needs it too. */ | |
2342 | current_buffer->enable_multibyte_characters = Qt; | |
2343 | ||
b05525fa | 2344 | GPT_BYTE = advance_to_char_boundary (GPT_BYTE); |
3ac81adb | 2345 | GPT = chars_in_text (BEG_ADDR, GPT_BYTE - BEG_BYTE) + BEG; |
b05525fa | 2346 | |
673c57d2 | 2347 | Z = chars_in_text (GAP_END_ADDR, Z_BYTE - GPT_BYTE) + GPT; |
b05525fa RS |
2348 | |
2349 | BEGV_BYTE = advance_to_char_boundary (BEGV_BYTE); | |
3ac81adb | 2350 | if (BEGV_BYTE > GPT_BYTE) |
673c57d2 | 2351 | BEGV = chars_in_text (GAP_END_ADDR, BEGV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2352 | else |
2353 | BEGV = chars_in_text (BEG_ADDR, BEGV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2354 | |
2355 | ZV_BYTE = advance_to_char_boundary (ZV_BYTE); | |
3ac81adb | 2356 | if (ZV_BYTE > GPT_BYTE) |
673c57d2 | 2357 | ZV = chars_in_text (GAP_END_ADDR, ZV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2358 | else |
2359 | ZV = chars_in_text (BEG_ADDR, ZV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2360 | |
2361 | { | |
2362 | int pt_byte = advance_to_char_boundary (PT_BYTE); | |
2363 | int pt; | |
2364 | ||
2365 | if (pt_byte > GPT_BYTE) | |
673c57d2 | 2366 | pt = chars_in_text (GAP_END_ADDR, pt_byte - GPT_BYTE) + GPT; |
b05525fa RS |
2367 | else |
2368 | pt = chars_in_text (BEG_ADDR, pt_byte - BEG_BYTE) + BEG; | |
2369 | TEMP_SET_PT_BOTH (pt, pt_byte); | |
2370 | } | |
3ac81adb RS |
2371 | |
2372 | tail = markers = BUF_MARKERS (current_buffer); | |
95fb069b RS |
2373 | |
2374 | /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from | |
2375 | getting confused by the markers that have not yet been updated. | |
2376 | It is also a signal that it should never create a marker. */ | |
65745fad | 2377 | BUF_MARKERS (current_buffer) = NULL; |
3ac81adb | 2378 | |
65745fad | 2379 | for (; tail; tail = tail->next) |
3ac81adb | 2380 | { |
65745fad SM |
2381 | tail->bytepos = advance_to_char_boundary (tail->bytepos); |
2382 | tail->charpos = BYTE_TO_CHAR (tail->bytepos); | |
3ac81adb | 2383 | } |
b69f9797 RS |
2384 | |
2385 | /* Make sure no markers were put on the chain | |
2386 | while the chain value was incorrect. */ | |
65745fad | 2387 | if (BUF_MARKERS (current_buffer)) |
b69f9797 RS |
2388 | abort (); |
2389 | ||
3ac81adb RS |
2390 | BUF_MARKERS (current_buffer) = markers; |
2391 | ||
2392 | /* Do this last, so it can calculate the new correspondences | |
2393 | between chars and bytes. */ | |
2394 | set_intervals_multibyte (1); | |
2395 | } | |
2396 | ||
38babc07 KS |
2397 | if (!EQ (old_undo, Qt)) |
2398 | { | |
2399 | /* Represent all the above changes by a special undo entry. */ | |
2400 | extern Lisp_Object Qapply; | |
8929fd87 KS |
2401 | current_buffer->undo_list = Fcons (list3 (Qapply, |
2402 | intern ("set-buffer-multibyte"), | |
2403 | NILP (flag) ? Qt : Qnil), | |
2404 | old_undo); | |
38babc07 KS |
2405 | } |
2406 | ||
2407 | UNGCPRO; | |
a9bcded1 | 2408 | |
724b203f GM |
2409 | /* Changing the multibyteness of a buffer means that all windows |
2410 | showing that buffer must be updated thoroughly. */ | |
2411 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2412 | ++windows_or_buffers_changed; | |
2413 | ||
abc9d959 RS |
2414 | /* Copy this buffer's new multibyte status |
2415 | into all of its indirect buffers. */ | |
2416 | for (other = all_buffers; other; other = other->next) | |
2417 | if (other->base_buffer == current_buffer && !NILP (other->name)) | |
724b203f GM |
2418 | { |
2419 | other->enable_multibyte_characters | |
2420 | = current_buffer->enable_multibyte_characters; | |
2421 | other->prevent_redisplay_optimizations_p = 1; | |
2422 | } | |
abc9d959 | 2423 | |
ed00559d KH |
2424 | /* Restore the modifiedness of the buffer. */ |
2425 | if (!modified_p && !NILP (Fbuffer_modified_p (Qnil))) | |
2426 | Fset_buffer_modified_p (Qnil); | |
2427 | ||
2a2b50a9 | 2428 | #ifdef subprocesses |
172f9454 KH |
2429 | /* Update coding systems of this buffer's process (if any). */ |
2430 | { | |
2431 | Lisp_Object process; | |
2432 | ||
2433 | process = Fget_buffer_process (Fcurrent_buffer ()); | |
2434 | if (PROCESSP (process)) | |
2435 | setup_process_coding_systems (process); | |
2436 | } | |
2a2b50a9 | 2437 | #endif /* subprocesses */ |
172f9454 | 2438 | |
3ac81adb RS |
2439 | return flag; |
2440 | } | |
2441 | \f | |
1ab256cb | 2442 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, Skill_all_local_variables, |
efc7e75f | 2443 | 0, 0, 0, |
7ee72033 | 2444 | doc: /* Switch to Fundamental mode by killing current buffer's local variables. |
018ba359 PJ |
2445 | Most local variable bindings are eliminated so that the default values |
2446 | become effective once more. Also, the syntax table is set from | |
2447 | `standard-syntax-table', the local keymap is set to nil, | |
2448 | and the abbrev table from `fundamental-mode-abbrev-table'. | |
2449 | This function also forces redisplay of the mode line. | |
2450 | ||
2451 | Every function to select a new major mode starts by | |
2452 | calling this function. | |
2453 | ||
2454 | As a special exception, local variables whose names have | |
2455 | a non-nil `permanent-local' property are not eliminated by this function. | |
2456 | ||
2457 | The first thing this function does is run | |
7ee72033 MB |
2458 | the normal hook `change-major-mode-hook'. */) |
2459 | () | |
1ab256cb RM |
2460 | { |
2461 | register Lisp_Object alist, sym, tem; | |
2462 | Lisp_Object oalist; | |
7410477a | 2463 | |
fd186f07 | 2464 | if (!NILP (Vrun_hooks)) |
43ed3b8d | 2465 | call1 (Vrun_hooks, Qchange_major_mode_hook); |
1ab256cb RM |
2466 | oalist = current_buffer->local_var_alist; |
2467 | ||
2f3f993b RS |
2468 | /* Make sure none of the bindings in oalist |
2469 | remain swapped in, in their symbols. */ | |
1ab256cb | 2470 | |
2f3f993b | 2471 | swap_out_buffer_local_variables (current_buffer); |
1ab256cb RM |
2472 | |
2473 | /* Actually eliminate all local bindings of this buffer. */ | |
2474 | ||
13de9290 | 2475 | reset_buffer_local_variables (current_buffer, 0); |
1ab256cb | 2476 | |
1ab256cb RM |
2477 | /* Any which are supposed to be permanent, |
2478 | make local again, with the same values they had. */ | |
177c0ea7 | 2479 | |
7539e11f | 2480 | for (alist = oalist; !NILP (alist); alist = XCDR (alist)) |
1ab256cb | 2481 | { |
7539e11f | 2482 | sym = XCAR (XCAR (alist)); |
1ab256cb | 2483 | tem = Fget (sym, Qpermanent_local); |
265a9e55 | 2484 | if (! NILP (tem)) |
01050cb5 RM |
2485 | { |
2486 | Fmake_local_variable (sym); | |
7539e11f | 2487 | Fset (sym, XCDR (XCAR (alist))); |
01050cb5 | 2488 | } |
1ab256cb RM |
2489 | } |
2490 | ||
2491 | /* Force mode-line redisplay. Useful here because all major mode | |
2492 | commands call this function. */ | |
2493 | update_mode_lines++; | |
2494 | ||
2495 | return Qnil; | |
2496 | } | |
2f3f993b RS |
2497 | |
2498 | /* Make sure no local variables remain set up with buffer B | |
2499 | for their current values. */ | |
2500 | ||
2501 | static void | |
2502 | swap_out_buffer_local_variables (b) | |
2503 | struct buffer *b; | |
2504 | { | |
2505 | Lisp_Object oalist, alist, sym, tem, buffer; | |
2506 | ||
2507 | XSETBUFFER (buffer, b); | |
2508 | oalist = b->local_var_alist; | |
2509 | ||
7539e11f | 2510 | for (alist = oalist; !NILP (alist); alist = XCDR (alist)) |
2f3f993b | 2511 | { |
7539e11f | 2512 | sym = XCAR (XCAR (alist)); |
2f3f993b RS |
2513 | |
2514 | /* Need not do anything if some other buffer's binding is now encached. */ | |
f5c1dd0d | 2515 | tem = XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym))->buffer; |
8801a864 | 2516 | if (BUFFERP (tem) && XBUFFER (tem) == current_buffer) |
2f3f993b RS |
2517 | { |
2518 | /* Symbol is set up for this buffer's old local value. | |
2519 | Set it up for the current buffer with the default value. */ | |
2520 | ||
f5c1dd0d | 2521 | tem = XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym))->cdr; |
2f3f993b RS |
2522 | /* Store the symbol's current value into the alist entry |
2523 | it is currently set up for. This is so that, if the | |
2524 | local is marked permanent, and we make it local again | |
2525 | later in Fkill_all_local_variables, we don't lose the value. */ | |
f3fbd155 KR |
2526 | XSETCDR (XCAR (tem), |
2527 | do_symval_forwarding (XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym))->realvalue)); | |
2f3f993b | 2528 | /* Switch to the symbol's default-value alist entry. */ |
f3fbd155 | 2529 | XSETCAR (tem, tem); |
2f3f993b | 2530 | /* Mark it as current for buffer B. */ |
f5c1dd0d | 2531 | XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym))->buffer = buffer; |
2f3f993b | 2532 | /* Store the current value into any forwarding in the symbol. */ |
3d871c85 | 2533 | store_symval_forwarding (sym, |
f5c1dd0d | 2534 | XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym))->realvalue, |
9b3a7dad | 2535 | XCDR (tem), NULL); |
2f3f993b RS |
2536 | } |
2537 | } | |
2538 | } | |
1ab256cb | 2539 | \f |
2eec3b4e | 2540 | /* Find all the overlays in the current buffer that contain position POS. |
177c0ea7 | 2541 | Return the number found, and store them in a vector in *VEC_PTR. |
2eec3b4e | 2542 | Store in *LEN_PTR the size allocated for the vector. |
52f8ec73 | 2543 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
624d2678 | 2544 | or ZV if there are no more overlays between POS and ZV. |
bbbe9545 | 2545 | Store in *PREV_PTR the previous position before POS where an overlay ends, |
413e06a4 | 2546 | or where an overlay starts which ends at or after POS; |
624d2678 | 2547 | or BEGV if there are no such overlays from BEGV to POS. |
239c932b | 2548 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. |
2eec3b4e RS |
2549 | |
2550 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
2551 | when this function is called. |
2552 | ||
2553 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2554 | If EXTEND is zero, we never extend the vector, | |
2555 | and we store only as many overlays as will fit. | |
ac869cf7 MB |
2556 | But we still return the total number of overlays. |
2557 | ||
2558 | If CHANGE_REQ is true, then any position written into *PREV_PTR or | |
2559 | *NEXT_PTR is guaranteed to be not equal to POS, unless it is the | |
2560 | default (BEGV or ZV). */ | |
2eec3b4e RS |
2561 | |
2562 | int | |
ac869cf7 | 2563 | overlays_at (pos, extend, vec_ptr, len_ptr, next_ptr, prev_ptr, change_req) |
c2d5b10f | 2564 | EMACS_INT pos; |
61d54cd5 | 2565 | int extend; |
2eec3b4e RS |
2566 | Lisp_Object **vec_ptr; |
2567 | int *len_ptr; | |
2568 | int *next_ptr; | |
239c932b | 2569 | int *prev_ptr; |
ac869cf7 | 2570 | int change_req; |
1ab256cb | 2571 | { |
2410d73a SM |
2572 | Lisp_Object overlay, start, end; |
2573 | struct Lisp_Overlay *tail; | |
2eec3b4e RS |
2574 | int idx = 0; |
2575 | int len = *len_ptr; | |
2576 | Lisp_Object *vec = *vec_ptr; | |
2577 | int next = ZV; | |
239c932b | 2578 | int prev = BEGV; |
61d54cd5 RS |
2579 | int inhibit_storing = 0; |
2580 | ||
2410d73a | 2581 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
2eec3b4e | 2582 | { |
239c932b | 2583 | int startpos, endpos; |
52f8ec73 | 2584 | |
2410d73a | 2585 | XSETMISC (overlay, tail); |
1ab256cb | 2586 | |
2eec3b4e RS |
2587 | start = OVERLAY_START (overlay); |
2588 | end = OVERLAY_END (overlay); | |
239c932b RS |
2589 | endpos = OVERLAY_POSITION (end); |
2590 | if (endpos < pos) | |
2591 | { | |
2592 | if (prev < endpos) | |
2593 | prev = endpos; | |
2594 | break; | |
2595 | } | |
413e06a4 RS |
2596 | startpos = OVERLAY_POSITION (start); |
2597 | /* This one ends at or after POS | |
daa1c109 | 2598 | so its start counts for PREV_PTR if it's before POS. */ |
413e06a4 RS |
2599 | if (prev < startpos && startpos < pos) |
2600 | prev = startpos; | |
239c932b RS |
2601 | if (endpos == pos) |
2602 | continue; | |
2eec3b4e RS |
2603 | if (startpos <= pos) |
2604 | { | |
2605 | if (idx == len) | |
2606 | { | |
61d54cd5 RS |
2607 | /* The supplied vector is full. |
2608 | Either make it bigger, or don't store any more in it. */ | |
2609 | if (extend) | |
2610 | { | |
0552666b GM |
2611 | /* Make it work with an initial len == 0. */ |
2612 | len *= 2; | |
2613 | if (len == 0) | |
2614 | len = 4; | |
2615 | *len_ptr = len; | |
61d54cd5 RS |
2616 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2617 | *vec_ptr = vec; | |
2618 | } | |
2619 | else | |
2620 | inhibit_storing = 1; | |
2eec3b4e | 2621 | } |
61d54cd5 RS |
2622 | |
2623 | if (!inhibit_storing) | |
2624 | vec[idx] = overlay; | |
2625 | /* Keep counting overlays even if we can't return them all. */ | |
2626 | idx++; | |
2eec3b4e RS |
2627 | } |
2628 | else if (startpos < next) | |
2629 | next = startpos; | |
2630 | } | |
2631 | ||
2410d73a | 2632 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
1ab256cb | 2633 | { |
239c932b | 2634 | int startpos, endpos; |
52f8ec73 | 2635 | |
2410d73a | 2636 | XSETMISC (overlay, tail); |
2eec3b4e RS |
2637 | |
2638 | start = OVERLAY_START (overlay); | |
2639 | end = OVERLAY_END (overlay); | |
2640 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 2641 | if (pos < startpos) |
2eec3b4e RS |
2642 | { |
2643 | if (startpos < next) | |
2644 | next = startpos; | |
2645 | break; | |
2646 | } | |
239c932b RS |
2647 | endpos = OVERLAY_POSITION (end); |
2648 | if (pos < endpos) | |
2eec3b4e RS |
2649 | { |
2650 | if (idx == len) | |
2651 | { | |
61d54cd5 RS |
2652 | if (extend) |
2653 | { | |
4b0e44fc RS |
2654 | /* Make it work with an initial len == 0. */ |
2655 | len *= 2; | |
0552666b | 2656 | if (len == 0) |
4b0e44fc RS |
2657 | len = 4; |
2658 | *len_ptr = len; | |
61d54cd5 RS |
2659 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2660 | *vec_ptr = vec; | |
2661 | } | |
2662 | else | |
2663 | inhibit_storing = 1; | |
2eec3b4e | 2664 | } |
61d54cd5 RS |
2665 | |
2666 | if (!inhibit_storing) | |
2667 | vec[idx] = overlay; | |
2668 | idx++; | |
413e06a4 RS |
2669 | |
2670 | if (startpos < pos && startpos > prev) | |
2671 | prev = startpos; | |
2eec3b4e | 2672 | } |
239c932b RS |
2673 | else if (endpos < pos && endpos > prev) |
2674 | prev = endpos; | |
1d5f4c1d MB |
2675 | else if (endpos == pos && startpos > prev |
2676 | && (!change_req || startpos < pos)) | |
413e06a4 | 2677 | prev = startpos; |
1ab256cb RM |
2678 | } |
2679 | ||
239c932b RS |
2680 | if (next_ptr) |
2681 | *next_ptr = next; | |
2682 | if (prev_ptr) | |
2683 | *prev_ptr = prev; | |
2eec3b4e RS |
2684 | return idx; |
2685 | } | |
74514898 RS |
2686 | \f |
2687 | /* Find all the overlays in the current buffer that overlap the range BEG-END | |
2a3eeee7 RS |
2688 | or are empty at BEG. |
2689 | ||
177c0ea7 | 2690 | Return the number found, and store them in a vector in *VEC_PTR. |
74514898 RS |
2691 | Store in *LEN_PTR the size allocated for the vector. |
2692 | Store in *NEXT_PTR the next position after POS where an overlay starts, | |
2693 | or ZV if there are no more overlays. | |
2694 | Store in *PREV_PTR the previous position before POS where an overlay ends, | |
2695 | or BEGV if there are no previous overlays. | |
2696 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
2697 | ||
2698 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
2699 | when this function is called. | |
2700 | ||
2701 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2702 | If EXTEND is zero, we never extend the vector, | |
2703 | and we store only as many overlays as will fit. | |
2704 | But we still return the total number of overlays. */ | |
2705 | ||
a9b9a780 | 2706 | static int |
74514898 RS |
2707 | overlays_in (beg, end, extend, vec_ptr, len_ptr, next_ptr, prev_ptr) |
2708 | int beg, end; | |
2709 | int extend; | |
2710 | Lisp_Object **vec_ptr; | |
2711 | int *len_ptr; | |
2712 | int *next_ptr; | |
2713 | int *prev_ptr; | |
2714 | { | |
2410d73a SM |
2715 | Lisp_Object overlay, ostart, oend; |
2716 | struct Lisp_Overlay *tail; | |
74514898 RS |
2717 | int idx = 0; |
2718 | int len = *len_ptr; | |
2719 | Lisp_Object *vec = *vec_ptr; | |
2720 | int next = ZV; | |
2721 | int prev = BEGV; | |
2722 | int inhibit_storing = 0; | |
2723 | ||
2410d73a | 2724 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
74514898 RS |
2725 | { |
2726 | int startpos, endpos; | |
2727 | ||
2410d73a | 2728 | XSETMISC (overlay, tail); |
74514898 RS |
2729 | |
2730 | ostart = OVERLAY_START (overlay); | |
2731 | oend = OVERLAY_END (overlay); | |
2732 | endpos = OVERLAY_POSITION (oend); | |
2733 | if (endpos < beg) | |
2734 | { | |
2735 | if (prev < endpos) | |
2736 | prev = endpos; | |
2737 | break; | |
2738 | } | |
2739 | startpos = OVERLAY_POSITION (ostart); | |
2740 | /* Count an interval if it either overlaps the range | |
2a3eeee7 | 2741 | or is empty at the start of the range. */ |
74514898 | 2742 | if ((beg < endpos && startpos < end) |
2a3eeee7 | 2743 | || (startpos == endpos && beg == endpos)) |
74514898 RS |
2744 | { |
2745 | if (idx == len) | |
2746 | { | |
2747 | /* The supplied vector is full. | |
2748 | Either make it bigger, or don't store any more in it. */ | |
2749 | if (extend) | |
2750 | { | |
4b0e44fc RS |
2751 | /* Make it work with an initial len == 0. */ |
2752 | len *= 2; | |
2753 | if (len == 0) | |
2754 | len = 4; | |
2755 | *len_ptr = len; | |
74514898 RS |
2756 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2757 | *vec_ptr = vec; | |
2758 | } | |
2759 | else | |
2760 | inhibit_storing = 1; | |
2761 | } | |
2762 | ||
2763 | if (!inhibit_storing) | |
2764 | vec[idx] = overlay; | |
2765 | /* Keep counting overlays even if we can't return them all. */ | |
2766 | idx++; | |
2767 | } | |
2768 | else if (startpos < next) | |
2769 | next = startpos; | |
2770 | } | |
2771 | ||
2410d73a | 2772 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
74514898 RS |
2773 | { |
2774 | int startpos, endpos; | |
2775 | ||
2410d73a | 2776 | XSETMISC (overlay, tail); |
74514898 RS |
2777 | |
2778 | ostart = OVERLAY_START (overlay); | |
2779 | oend = OVERLAY_END (overlay); | |
2780 | startpos = OVERLAY_POSITION (ostart); | |
2781 | if (end < startpos) | |
2782 | { | |
2783 | if (startpos < next) | |
2784 | next = startpos; | |
2785 | break; | |
2786 | } | |
2787 | endpos = OVERLAY_POSITION (oend); | |
2a3eeee7 RS |
2788 | /* Count an interval if it either overlaps the range |
2789 | or is empty at the start of the range. */ | |
74514898 | 2790 | if ((beg < endpos && startpos < end) |
2a3eeee7 | 2791 | || (startpos == endpos && beg == endpos)) |
74514898 RS |
2792 | { |
2793 | if (idx == len) | |
2794 | { | |
2795 | if (extend) | |
2796 | { | |
4b0e44fc RS |
2797 | /* Make it work with an initial len == 0. */ |
2798 | len *= 2; | |
2799 | if (len == 0) | |
2800 | len = 4; | |
2801 | *len_ptr = len; | |
74514898 RS |
2802 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2803 | *vec_ptr = vec; | |
2804 | } | |
2805 | else | |
2806 | inhibit_storing = 1; | |
2807 | } | |
2808 | ||
2809 | if (!inhibit_storing) | |
2810 | vec[idx] = overlay; | |
2811 | idx++; | |
2812 | } | |
2813 | else if (endpos < beg && endpos > prev) | |
2814 | prev = endpos; | |
2815 | } | |
fc04fa47 | 2816 | |
74514898 RS |
2817 | if (next_ptr) |
2818 | *next_ptr = next; | |
2819 | if (prev_ptr) | |
2820 | *prev_ptr = prev; | |
2821 | return idx; | |
2822 | } | |
09a22085 GM |
2823 | |
2824 | ||
2825 | /* Return non-zero if there exists an overlay with a non-nil | |
2826 | `mouse-face' property overlapping OVERLAY. */ | |
2827 | ||
2828 | int | |
2829 | mouse_face_overlay_overlaps (overlay) | |
2830 | Lisp_Object overlay; | |
2831 | { | |
2832 | int start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2833 | int end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
bfd8410f | 2834 | int n, i, size; |
09a22085 | 2835 | Lisp_Object *v, tem; |
177c0ea7 | 2836 | |
bfd8410f GM |
2837 | size = 10; |
2838 | v = (Lisp_Object *) alloca (size * sizeof *v); | |
2839 | n = overlays_in (start, end, 0, &v, &size, NULL, NULL); | |
2840 | if (n > size) | |
09a22085 | 2841 | { |
09a22085 GM |
2842 | v = (Lisp_Object *) alloca (n * sizeof *v); |
2843 | overlays_in (start, end, 0, &v, &n, NULL, NULL); | |
2844 | } | |
2845 | ||
2846 | for (i = 0; i < n; ++i) | |
2847 | if (!EQ (v[i], overlay) | |
2848 | && (tem = Foverlay_get (overlay, Qmouse_face), | |
2849 | !NILP (tem))) | |
2850 | break; | |
2851 | ||
2852 | return i < n; | |
2853 | } | |
2854 | ||
2855 | ||
74514898 | 2856 | \f |
fc04fa47 KH |
2857 | /* Fast function to just test if we're at an overlay boundary. */ |
2858 | int | |
2859 | overlay_touches_p (pos) | |
2860 | int pos; | |
2861 | { | |
2410d73a SM |
2862 | Lisp_Object overlay; |
2863 | struct Lisp_Overlay *tail; | |
fc04fa47 | 2864 | |
2410d73a | 2865 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
fc04fa47 KH |
2866 | { |
2867 | int endpos; | |
2868 | ||
2410d73a | 2869 | XSETMISC (overlay ,tail); |
fc04fa47 KH |
2870 | if (!GC_OVERLAYP (overlay)) |
2871 | abort (); | |
2872 | ||
2873 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2874 | if (endpos < pos) | |
2875 | break; | |
2876 | if (endpos == pos || OVERLAY_POSITION (OVERLAY_START (overlay)) == pos) | |
2877 | return 1; | |
2878 | } | |
2879 | ||
2410d73a | 2880 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
fc04fa47 KH |
2881 | { |
2882 | int startpos; | |
2883 | ||
2410d73a | 2884 | XSETMISC (overlay, tail); |
fc04fa47 KH |
2885 | if (!GC_OVERLAYP (overlay)) |
2886 | abort (); | |
2887 | ||
2888 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2889 | if (pos < startpos) | |
2890 | break; | |
2891 | if (startpos == pos || OVERLAY_POSITION (OVERLAY_END (overlay)) == pos) | |
2892 | return 1; | |
2893 | } | |
2894 | return 0; | |
2895 | } | |
2eec3b4e | 2896 | \f |
5985d248 KH |
2897 | struct sortvec |
2898 | { | |
2899 | Lisp_Object overlay; | |
2900 | int beg, end; | |
2901 | int priority; | |
2902 | }; | |
2903 | ||
2904 | static int | |
dfcf069d AS |
2905 | compare_overlays (v1, v2) |
2906 | const void *v1, *v2; | |
5985d248 | 2907 | { |
dfcf069d AS |
2908 | const struct sortvec *s1 = (const struct sortvec *) v1; |
2909 | const struct sortvec *s2 = (const struct sortvec *) v2; | |
5985d248 KH |
2910 | if (s1->priority != s2->priority) |
2911 | return s1->priority - s2->priority; | |
2912 | if (s1->beg != s2->beg) | |
2913 | return s1->beg - s2->beg; | |
2914 | if (s1->end != s2->end) | |
2915 | return s2->end - s1->end; | |
2916 | return 0; | |
2917 | } | |
2918 | ||
2919 | /* Sort an array of overlays by priority. The array is modified in place. | |
2920 | The return value is the new size; this may be smaller than the original | |
2921 | size if some of the overlays were invalid or were window-specific. */ | |
2922 | int | |
2923 | sort_overlays (overlay_vec, noverlays, w) | |
2924 | Lisp_Object *overlay_vec; | |
2925 | int noverlays; | |
2926 | struct window *w; | |
2927 | { | |
2928 | int i, j; | |
2929 | struct sortvec *sortvec; | |
2930 | sortvec = (struct sortvec *) alloca (noverlays * sizeof (struct sortvec)); | |
2931 | ||
2932 | /* Put the valid and relevant overlays into sortvec. */ | |
2933 | ||
2934 | for (i = 0, j = 0; i < noverlays; i++) | |
2935 | { | |
0fa767e7 | 2936 | Lisp_Object tem; |
c99fc30f | 2937 | Lisp_Object overlay; |
5985d248 | 2938 | |
c99fc30f | 2939 | overlay = overlay_vec[i]; |
5985d248 KH |
2940 | if (OVERLAY_VALID (overlay) |
2941 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 | |
2942 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
2943 | { | |
0fa767e7 KH |
2944 | /* If we're interested in a specific window, then ignore |
2945 | overlays that are limited to some other window. */ | |
2946 | if (w) | |
5985d248 | 2947 | { |
0fa767e7 KH |
2948 | Lisp_Object window; |
2949 | ||
2950 | window = Foverlay_get (overlay, Qwindow); | |
a7a60ce9 | 2951 | if (WINDOWP (window) && XWINDOW (window) != w) |
0fa767e7 | 2952 | continue; |
5985d248 | 2953 | } |
0fa767e7 KH |
2954 | |
2955 | /* This overlay is good and counts: put it into sortvec. */ | |
2956 | sortvec[j].overlay = overlay; | |
2957 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2958 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2959 | tem = Foverlay_get (overlay, Qpriority); | |
2960 | if (INTEGERP (tem)) | |
2961 | sortvec[j].priority = XINT (tem); | |
2962 | else | |
2963 | sortvec[j].priority = 0; | |
2964 | j++; | |
5985d248 KH |
2965 | } |
2966 | } | |
2967 | noverlays = j; | |
2968 | ||
2969 | /* Sort the overlays into the proper order: increasing priority. */ | |
2970 | ||
2971 | if (noverlays > 1) | |
2972 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
2973 | ||
2974 | for (i = 0; i < noverlays; i++) | |
2975 | overlay_vec[i] = sortvec[i].overlay; | |
2976 | return (noverlays); | |
2977 | } | |
2978 | \f | |
bbbe9545 KH |
2979 | struct sortstr |
2980 | { | |
cb26008f | 2981 | Lisp_Object string, string2; |
bbbe9545 KH |
2982 | int size; |
2983 | int priority; | |
2984 | }; | |
2985 | ||
e8185fa8 KH |
2986 | struct sortstrlist |
2987 | { | |
2988 | struct sortstr *buf; /* An array that expands as needed; never freed. */ | |
2989 | int size; /* Allocated length of that array. */ | |
2990 | int used; /* How much of the array is currently in use. */ | |
2991 | int bytes; /* Total length of the strings in buf. */ | |
2992 | }; | |
2993 | ||
2994 | /* Buffers for storing information about the overlays touching a given | |
2995 | position. These could be automatic variables in overlay_strings, but | |
2996 | it's more efficient to hold onto the memory instead of repeatedly | |
2997 | allocating and freeing it. */ | |
2998 | static struct sortstrlist overlay_heads, overlay_tails; | |
9492daf2 | 2999 | static unsigned char *overlay_str_buf; |
e8185fa8 KH |
3000 | |
3001 | /* Allocated length of overlay_str_buf. */ | |
3002 | static int overlay_str_len; | |
3003 | ||
bbbe9545 KH |
3004 | /* A comparison function suitable for passing to qsort. */ |
3005 | static int | |
3006 | cmp_for_strings (as1, as2) | |
3007 | char *as1, *as2; | |
3008 | { | |
3009 | struct sortstr *s1 = (struct sortstr *)as1; | |
3010 | struct sortstr *s2 = (struct sortstr *)as2; | |
3011 | if (s1->size != s2->size) | |
3012 | return s2->size - s1->size; | |
3013 | if (s1->priority != s2->priority) | |
3014 | return s1->priority - s2->priority; | |
3015 | return 0; | |
3016 | } | |
3017 | ||
e8185fa8 | 3018 | static void |
cb26008f | 3019 | record_overlay_string (ssl, str, str2, pri, size) |
e8185fa8 | 3020 | struct sortstrlist *ssl; |
cb26008f | 3021 | Lisp_Object str, str2, pri; |
e8185fa8 KH |
3022 | int size; |
3023 | { | |
43d27a72 RS |
3024 | int nbytes; |
3025 | ||
e8185fa8 KH |
3026 | if (ssl->used == ssl->size) |
3027 | { | |
3028 | if (ssl->buf) | |
3029 | ssl->size *= 2; | |
3030 | else | |
3031 | ssl->size = 5; | |
3032 | ssl->buf = ((struct sortstr *) | |
3033 | xrealloc (ssl->buf, ssl->size * sizeof (struct sortstr))); | |
3034 | } | |
3035 | ssl->buf[ssl->used].string = str; | |
cb26008f | 3036 | ssl->buf[ssl->used].string2 = str2; |
e8185fa8 KH |
3037 | ssl->buf[ssl->used].size = size; |
3038 | ssl->buf[ssl->used].priority = (INTEGERP (pri) ? XINT (pri) : 0); | |
3039 | ssl->used++; | |
43d27a72 RS |
3040 | |
3041 | if (NILP (current_buffer->enable_multibyte_characters)) | |
d5db4077 | 3042 | nbytes = SCHARS (str); |
43d27a72 | 3043 | else if (! STRING_MULTIBYTE (str)) |
d5db4077 KR |
3044 | nbytes = count_size_as_multibyte (SDATA (str), |
3045 | SBYTES (str)); | |
43d27a72 | 3046 | else |
d5db4077 | 3047 | nbytes = SBYTES (str); |
43d27a72 RS |
3048 | |
3049 | ssl->bytes += nbytes; | |
3050 | ||
cb26008f | 3051 | if (STRINGP (str2)) |
43d27a72 RS |
3052 | { |
3053 | if (NILP (current_buffer->enable_multibyte_characters)) | |
d5db4077 | 3054 | nbytes = SCHARS (str2); |
43d27a72 | 3055 | else if (! STRING_MULTIBYTE (str2)) |
d5db4077 KR |
3056 | nbytes = count_size_as_multibyte (SDATA (str2), |
3057 | SBYTES (str2)); | |
43d27a72 | 3058 | else |
d5db4077 | 3059 | nbytes = SBYTES (str2); |
43d27a72 RS |
3060 | |
3061 | ssl->bytes += nbytes; | |
3062 | } | |
e8185fa8 | 3063 | } |
bbbe9545 KH |
3064 | |
3065 | /* Return the concatenation of the strings associated with overlays that | |
3066 | begin or end at POS, ignoring overlays that are specific to a window | |
3067 | other than W. The strings are concatenated in the appropriate order: | |
3068 | shorter overlays nest inside longer ones, and higher priority inside | |
cb26008f KH |
3069 | lower. Normally all of the after-strings come first, but zero-sized |
3070 | overlays have their after-strings ride along with the before-strings | |
3071 | because it would look strange to print them inside-out. | |
3072 | ||
3073 | Returns the string length, and stores the contents indirectly through | |
3074 | PSTR, if that variable is non-null. The string may be overwritten by | |
3075 | subsequent calls. */ | |
6b5d3b89 | 3076 | |
bbbe9545 KH |
3077 | int |
3078 | overlay_strings (pos, w, pstr) | |
c2d5b10f | 3079 | EMACS_INT pos; |
bbbe9545 | 3080 | struct window *w; |
6b5d3b89 | 3081 | unsigned char **pstr; |
bbbe9545 | 3082 | { |
2410d73a SM |
3083 | Lisp_Object overlay, window, str; |
3084 | struct Lisp_Overlay *ov; | |
bbbe9545 | 3085 | int startpos, endpos; |
43d27a72 | 3086 | int multibyte = ! NILP (current_buffer->enable_multibyte_characters); |
bbbe9545 | 3087 | |
e8185fa8 KH |
3088 | overlay_heads.used = overlay_heads.bytes = 0; |
3089 | overlay_tails.used = overlay_tails.bytes = 0; | |
2410d73a | 3090 | for (ov = current_buffer->overlays_before; ov; ov = ov->next) |
bbbe9545 | 3091 | { |
2410d73a | 3092 | XSETMISC (overlay, ov); |
c2d5b10f | 3093 | eassert (OVERLAYP (overlay)); |
bbbe9545 KH |
3094 | |
3095 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3096 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3097 | if (endpos < pos) | |
3098 | break; | |
3099 | if (endpos != pos && startpos != pos) | |
3100 | continue; | |
3101 | window = Foverlay_get (overlay, Qwindow); | |
3102 | if (WINDOWP (window) && XWINDOW (window) != w) | |
3103 | continue; | |
e8185fa8 KH |
3104 | if (startpos == pos |
3105 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3106 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3107 | (startpos == endpos |
3108 | ? Foverlay_get (overlay, Qafter_string) | |
3109 | : Qnil), | |
3110 | Foverlay_get (overlay, Qpriority), | |
3111 | endpos - startpos); | |
3112 | else if (endpos == pos | |
3113 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3114 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3115 | Foverlay_get (overlay, Qpriority), |
3116 | endpos - startpos); | |
bbbe9545 | 3117 | } |
2410d73a | 3118 | for (ov = current_buffer->overlays_after; ov; ov = ov->next) |
bbbe9545 | 3119 | { |
2410d73a SM |
3120 | XSETMISC (overlay, ov); |
3121 | eassert (OVERLAYP (overlay)); | |
bbbe9545 KH |
3122 | |
3123 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3124 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3125 | if (startpos > pos) | |
3126 | break; | |
e8185fa8 KH |
3127 | if (endpos != pos && startpos != pos) |
3128 | continue; | |
3129 | window = Foverlay_get (overlay, Qwindow); | |
3130 | if (WINDOWP (window) && XWINDOW (window) != w) | |
3131 | continue; | |
e8185fa8 KH |
3132 | if (startpos == pos |
3133 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3134 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3135 | (startpos == endpos |
3136 | ? Foverlay_get (overlay, Qafter_string) | |
3137 | : Qnil), | |
3138 | Foverlay_get (overlay, Qpriority), | |
3139 | endpos - startpos); | |
3140 | else if (endpos == pos | |
3141 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3142 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3143 | Foverlay_get (overlay, Qpriority), |
3144 | endpos - startpos); | |
bbbe9545 | 3145 | } |
e8185fa8 KH |
3146 | if (overlay_tails.used > 1) |
3147 | qsort (overlay_tails.buf, overlay_tails.used, sizeof (struct sortstr), | |
3148 | cmp_for_strings); | |
3149 | if (overlay_heads.used > 1) | |
3150 | qsort (overlay_heads.buf, overlay_heads.used, sizeof (struct sortstr), | |
3151 | cmp_for_strings); | |
3152 | if (overlay_heads.bytes || overlay_tails.bytes) | |
bbbe9545 | 3153 | { |
e8185fa8 | 3154 | Lisp_Object tem; |
bbbe9545 | 3155 | int i; |
9f4d7cde | 3156 | unsigned char *p; |
e8185fa8 | 3157 | int total = overlay_heads.bytes + overlay_tails.bytes; |
bbbe9545 KH |
3158 | |
3159 | if (total > overlay_str_len) | |
9f4d7cde RS |
3160 | { |
3161 | overlay_str_len = total; | |
3162 | overlay_str_buf = (unsigned char *)xrealloc (overlay_str_buf, | |
3163 | total); | |
3164 | } | |
bbbe9545 | 3165 | p = overlay_str_buf; |
e8185fa8 | 3166 | for (i = overlay_tails.used; --i >= 0;) |
bbbe9545 | 3167 | { |
43d27a72 | 3168 | int nbytes; |
e8185fa8 | 3169 | tem = overlay_tails.buf[i].string; |
d5db4077 KR |
3170 | nbytes = copy_text (SDATA (tem), p, |
3171 | SBYTES (tem), | |
43d27a72 RS |
3172 | STRING_MULTIBYTE (tem), multibyte); |
3173 | p += nbytes; | |
bbbe9545 | 3174 | } |
e8185fa8 | 3175 | for (i = 0; i < overlay_heads.used; ++i) |
bbbe9545 | 3176 | { |
43d27a72 | 3177 | int nbytes; |
e8185fa8 | 3178 | tem = overlay_heads.buf[i].string; |
d5db4077 KR |
3179 | nbytes = copy_text (SDATA (tem), p, |
3180 | SBYTES (tem), | |
43d27a72 RS |
3181 | STRING_MULTIBYTE (tem), multibyte); |
3182 | p += nbytes; | |
cb26008f KH |
3183 | tem = overlay_heads.buf[i].string2; |
3184 | if (STRINGP (tem)) | |
3185 | { | |
d5db4077 KR |
3186 | nbytes = copy_text (SDATA (tem), p, |
3187 | SBYTES (tem), | |
43d27a72 RS |
3188 | STRING_MULTIBYTE (tem), multibyte); |
3189 | p += nbytes; | |
cb26008f | 3190 | } |
bbbe9545 | 3191 | } |
cb26008f KH |
3192 | if (p != overlay_str_buf + total) |
3193 | abort (); | |
bbbe9545 KH |
3194 | if (pstr) |
3195 | *pstr = overlay_str_buf; | |
e8185fa8 | 3196 | return total; |
bbbe9545 | 3197 | } |
e8185fa8 | 3198 | return 0; |
bbbe9545 KH |
3199 | } |
3200 | \f | |
5c4f68f1 | 3201 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 3202 | |
2eec3b4e | 3203 | void |
5c4f68f1 JB |
3204 | recenter_overlay_lists (buf, pos) |
3205 | struct buffer *buf; | |
c2d5b10f | 3206 | EMACS_INT pos; |
2eec3b4e | 3207 | { |
2410d73a SM |
3208 | Lisp_Object overlay, beg, end; |
3209 | struct Lisp_Overlay *prev, *tail, *next; | |
2eec3b4e RS |
3210 | |
3211 | /* See if anything in overlays_before should move to overlays_after. */ | |
3212 | ||
3213 | /* We don't strictly need prev in this loop; it should always be nil. | |
3214 | But we use it for symmetry and in case that should cease to be true | |
3215 | with some future change. */ | |
2410d73a SM |
3216 | prev = NULL; |
3217 | for (tail = buf->overlays_before; tail; prev = tail, tail = next) | |
1ab256cb | 3218 | { |
2410d73a SM |
3219 | next = tail->next; |
3220 | XSETMISC (overlay, tail); | |
2eec3b4e RS |
3221 | |
3222 | /* If the overlay is not valid, get rid of it. */ | |
3223 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3224 | #if 1 |
3225 | abort (); | |
3226 | #else | |
2eec3b4e RS |
3227 | { |
3228 | /* Splice the cons cell TAIL out of overlays_before. */ | |
3229 | if (!NILP (prev)) | |
7539e11f | 3230 | XCDR (prev) = next; |
2eec3b4e | 3231 | else |
5c4f68f1 | 3232 | buf->overlays_before = next; |
2eec3b4e RS |
3233 | tail = prev; |
3234 | continue; | |
3235 | } | |
52f8ec73 | 3236 | #endif |
1ab256cb | 3237 | |
2eec3b4e RS |
3238 | beg = OVERLAY_START (overlay); |
3239 | end = OVERLAY_END (overlay); | |
1ab256cb | 3240 | |
2eec3b4e | 3241 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 3242 | { |
2eec3b4e RS |
3243 | /* OVERLAY needs to be moved. */ |
3244 | int where = OVERLAY_POSITION (beg); | |
2410d73a | 3245 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3246 | |
3247 | /* Splice the cons cell TAIL out of overlays_before. */ | |
2410d73a SM |
3248 | if (prev) |
3249 | prev->next = next; | |
2eec3b4e | 3250 | else |
5c4f68f1 | 3251 | buf->overlays_before = next; |
2eec3b4e RS |
3252 | |
3253 | /* Search thru overlays_after for where to put it. */ | |
2410d73a SM |
3254 | other_prev = NULL; |
3255 | for (other = buf->overlays_after; other; | |
3256 | other_prev = other, other = other->next) | |
1ab256cb | 3257 | { |
6af718a4 | 3258 | Lisp_Object otherbeg, otheroverlay; |
2eec3b4e | 3259 | |
2410d73a SM |
3260 | XSETMISC (otheroverlay, other); |
3261 | eassert (OVERLAY_VALID (otheroverlay)); | |
2eec3b4e RS |
3262 | |
3263 | otherbeg = OVERLAY_START (otheroverlay); | |
3264 | if (OVERLAY_POSITION (otherbeg) >= where) | |
3265 | break; | |
1ab256cb | 3266 | } |
2eec3b4e RS |
3267 | |
3268 | /* Add TAIL to overlays_after before OTHER. */ | |
2410d73a SM |
3269 | tail->next = other; |
3270 | if (other_prev) | |
3271 | other_prev->next = tail; | |
1ab256cb | 3272 | else |
5c4f68f1 | 3273 | buf->overlays_after = tail; |
2eec3b4e | 3274 | tail = prev; |
1ab256cb | 3275 | } |
2eec3b4e RS |
3276 | else |
3277 | /* We've reached the things that should stay in overlays_before. | |
3278 | All the rest of overlays_before must end even earlier, | |
3279 | so stop now. */ | |
3280 | break; | |
3281 | } | |
3282 | ||
3283 | /* See if anything in overlays_after should be in overlays_before. */ | |
2410d73a SM |
3284 | prev = NULL; |
3285 | for (tail = buf->overlays_after; tail; prev = tail, tail = next) | |
2eec3b4e | 3286 | { |
2410d73a SM |
3287 | next = tail->next; |
3288 | XSETMISC (overlay, tail); | |
2eec3b4e RS |
3289 | |
3290 | /* If the overlay is not valid, get rid of it. */ | |
3291 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3292 | #if 1 |
3293 | abort (); | |
3294 | #else | |
2eec3b4e RS |
3295 | { |
3296 | /* Splice the cons cell TAIL out of overlays_after. */ | |
3297 | if (!NILP (prev)) | |
7539e11f | 3298 | XCDR (prev) = next; |
2eec3b4e | 3299 | else |
5c4f68f1 | 3300 | buf->overlays_after = next; |
2eec3b4e RS |
3301 | tail = prev; |
3302 | continue; | |
3303 | } | |
52f8ec73 | 3304 | #endif |
2eec3b4e RS |
3305 | |
3306 | beg = OVERLAY_START (overlay); | |
3307 | end = OVERLAY_END (overlay); | |
3308 | ||
3309 | /* Stop looking, when we know that nothing further | |
3310 | can possibly end before POS. */ | |
3311 | if (OVERLAY_POSITION (beg) > pos) | |
3312 | break; | |
3313 | ||
3314 | if (OVERLAY_POSITION (end) <= pos) | |
3315 | { | |
3316 | /* OVERLAY needs to be moved. */ | |
3317 | int where = OVERLAY_POSITION (end); | |
2410d73a | 3318 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3319 | |
3320 | /* Splice the cons cell TAIL out of overlays_after. */ | |
2410d73a SM |
3321 | if (prev) |
3322 | prev->next = next; | |
2eec3b4e | 3323 | else |
5c4f68f1 | 3324 | buf->overlays_after = next; |
2eec3b4e RS |
3325 | |
3326 | /* Search thru overlays_before for where to put it. */ | |
2410d73a SM |
3327 | other_prev = NULL; |
3328 | for (other = buf->overlays_before; other; | |
3329 | other_prev = other, other = other->next) | |
2eec3b4e RS |
3330 | { |
3331 | Lisp_Object otherend, otheroverlay; | |
2eec3b4e | 3332 | |
2410d73a SM |
3333 | XSETMISC (otheroverlay, other); |
3334 | eassert (OVERLAY_VALID (otheroverlay)); | |
2eec3b4e RS |
3335 | |
3336 | otherend = OVERLAY_END (otheroverlay); | |
3337 | if (OVERLAY_POSITION (otherend) <= where) | |
3338 | break; | |
3339 | } | |
3340 | ||
3341 | /* Add TAIL to overlays_before before OTHER. */ | |
2410d73a SM |
3342 | tail->next = other; |
3343 | if (other_prev) | |
3344 | other_prev->next = tail; | |
2eec3b4e | 3345 | else |
5c4f68f1 | 3346 | buf->overlays_before = tail; |
2eec3b4e RS |
3347 | tail = prev; |
3348 | } | |
3349 | } | |
3350 | ||
c2d5b10f | 3351 | buf->overlay_center = pos; |
2eec3b4e | 3352 | } |
2b1bdf65 | 3353 | |
423cdb46 KH |
3354 | void |
3355 | adjust_overlays_for_insert (pos, length) | |
c2d5b10f SM |
3356 | EMACS_INT pos; |
3357 | EMACS_INT length; | |
423cdb46 KH |
3358 | { |
3359 | /* After an insertion, the lists are still sorted properly, | |
3360 | but we may need to update the value of the overlay center. */ | |
c2d5b10f SM |
3361 | if (current_buffer->overlay_center >= pos) |
3362 | current_buffer->overlay_center += length; | |
423cdb46 KH |
3363 | } |
3364 | ||
3365 | void | |
3366 | adjust_overlays_for_delete (pos, length) | |
c2d5b10f SM |
3367 | EMACS_INT pos; |
3368 | EMACS_INT length; | |
423cdb46 | 3369 | { |
c2d5b10f | 3370 | if (current_buffer->overlay_center < pos) |
423cdb46 KH |
3371 | /* The deletion was to our right. No change needed; the before- and |
3372 | after-lists are still consistent. */ | |
3373 | ; | |
c2d5b10f | 3374 | else if (current_buffer->overlay_center > pos + length) |
423cdb46 KH |
3375 | /* The deletion was to our left. We need to adjust the center value |
3376 | to account for the change in position, but the lists are consistent | |
3377 | given the new value. */ | |
c2d5b10f | 3378 | current_buffer->overlay_center -= length; |
423cdb46 KH |
3379 | else |
3380 | /* We're right in the middle. There might be things on the after-list | |
3381 | that now belong on the before-list. Recentering will move them, | |
3382 | and also update the center point. */ | |
3383 | recenter_overlay_lists (current_buffer, pos); | |
3384 | } | |
3385 | ||
2b1bdf65 KH |
3386 | /* Fix up overlays that were garbled as a result of permuting markers |
3387 | in the range START through END. Any overlay with at least one | |
3388 | endpoint in this range will need to be unlinked from the overlay | |
3389 | list and reinserted in its proper place. | |
3390 | Such an overlay might even have negative size at this point. | |
6b61353c | 3391 | If so, we'll make the overlay empty. */ |
2b1bdf65 | 3392 | void |
6b61353c | 3393 | fix_start_end_in_overlays (start, end) |
2b1bdf65 KH |
3394 | register int start, end; |
3395 | { | |
6af718a4 | 3396 | Lisp_Object overlay; |
2410d73a | 3397 | struct Lisp_Overlay *before_list, *after_list; |
1138e742 KR |
3398 | /* These are either nil, indicating that before_list or after_list |
3399 | should be assigned, or the cons cell the cdr of which should be | |
3400 | assigned. */ | |
2410d73a | 3401 | struct Lisp_Overlay *beforep = NULL, *afterp = NULL; |
1138e742 KR |
3402 | /* 'Parent', likewise, indicates a cons cell or |
3403 | current_buffer->overlays_before or overlays_after, depending | |
3404 | which loop we're in. */ | |
2410d73a | 3405 | struct Lisp_Overlay *tail, *parent; |
2b1bdf65 KH |
3406 | int startpos, endpos; |
3407 | ||
3408 | /* This algorithm shifts links around instead of consing and GCing. | |
3409 | The loop invariant is that before_list (resp. after_list) is a | |
1138e742 KR |
3410 | well-formed list except that its last element, the CDR of beforep |
3411 | (resp. afterp) if beforep (afterp) isn't nil or before_list | |
3412 | (after_list) if it is, is still uninitialized. So it's not a bug | |
3413 | that before_list isn't initialized, although it may look | |
3414 | strange. */ | |
2410d73a | 3415 | for (parent = NULL, tail = current_buffer->overlays_before; tail;) |
2b1bdf65 | 3416 | { |
2410d73a | 3417 | XSETMISC (overlay, tail); |
6b61353c | 3418 | |
2b1bdf65 | 3419 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
6b61353c KH |
3420 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3421 | ||
3422 | /* If the overlay is backwards, make it empty. */ | |
3423 | if (endpos < startpos) | |
3424 | { | |
3425 | startpos = endpos; | |
3426 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
3427 | Qnil); | |
3428 | } | |
3429 | ||
2b1bdf65 KH |
3430 | if (endpos < start) |
3431 | break; | |
60ebfdf3 | 3432 | |
2b1bdf65 KH |
3433 | if (endpos < end |
3434 | || (startpos >= start && startpos < end)) | |
3435 | { | |
2b1bdf65 KH |
3436 | /* Add it to the end of the wrong list. Later on, |
3437 | recenter_overlay_lists will move it to the right place. */ | |
c2d5b10f | 3438 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3439 | { |
2410d73a | 3440 | if (!afterp) |
1138e742 KR |
3441 | after_list = tail; |
3442 | else | |
2410d73a | 3443 | afterp->next = tail; |
1138e742 | 3444 | afterp = tail; |
2b1bdf65 KH |
3445 | } |
3446 | else | |
3447 | { | |
2410d73a | 3448 | if (!beforep) |
1138e742 KR |
3449 | before_list = tail; |
3450 | else | |
2410d73a | 3451 | beforep->next = tail; |
1138e742 | 3452 | beforep = tail; |
2b1bdf65 | 3453 | } |
2410d73a SM |
3454 | if (!parent) |
3455 | current_buffer->overlays_before = tail->next; | |
1138e742 | 3456 | else |
2410d73a SM |
3457 | parent->next = tail->next; |
3458 | tail = tail->next; | |
2b1bdf65 KH |
3459 | } |
3460 | else | |
2410d73a | 3461 | parent = tail, tail = parent->next; |
2b1bdf65 | 3462 | } |
2410d73a | 3463 | for (parent = NULL, tail = current_buffer->overlays_after; tail;) |
2b1bdf65 | 3464 | { |
2410d73a | 3465 | XSETMISC (overlay, tail); |
6b61353c | 3466 | |
2b1bdf65 | 3467 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
6b61353c KH |
3468 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
3469 | ||
3470 | /* If the overlay is backwards, make it empty. */ | |
3471 | if (endpos < startpos) | |
3472 | { | |
3473 | startpos = endpos; | |
3474 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
60ebfdf3 | 3475 | Qnil); |
6b61353c KH |
3476 | } |
3477 | ||
2b1bdf65 KH |
3478 | if (startpos >= end) |
3479 | break; | |
6b61353c | 3480 | |
2b1bdf65 KH |
3481 | if (startpos >= start |
3482 | || (endpos >= start && endpos < end)) | |
3483 | { | |
c2d5b10f | 3484 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3485 | { |
2410d73a | 3486 | if (!afterp) |
1138e742 KR |
3487 | after_list = tail; |
3488 | else | |
2410d73a | 3489 | afterp->next = tail; |
1138e742 | 3490 | afterp = tail; |
2b1bdf65 KH |
3491 | } |
3492 | else | |
3493 | { | |
2410d73a | 3494 | if (!beforep) |
1138e742 KR |
3495 | before_list = tail; |
3496 | else | |
2410d73a | 3497 | beforep->next = tail; |
1138e742 | 3498 | beforep = tail; |
2b1bdf65 | 3499 | } |
2410d73a SM |
3500 | if (!parent) |
3501 | current_buffer->overlays_after = tail->next; | |
1138e742 | 3502 | else |
2410d73a SM |
3503 | parent->next = tail->next; |
3504 | tail = tail->next; | |
2b1bdf65 KH |
3505 | } |
3506 | else | |
2410d73a | 3507 | parent = tail, tail = parent->next; |
2b1bdf65 KH |
3508 | } |
3509 | ||
3510 | /* Splice the constructed (wrong) lists into the buffer's lists, | |
3511 | and let the recenter function make it sane again. */ | |
2410d73a | 3512 | if (beforep) |
1138e742 | 3513 | { |
2410d73a | 3514 | beforep->next = current_buffer->overlays_before; |
1138e742 KR |
3515 | current_buffer->overlays_before = before_list; |
3516 | } | |
c2d5b10f | 3517 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3518 | |
2410d73a | 3519 | if (afterp) |
1138e742 | 3520 | { |
2410d73a | 3521 | afterp->next = current_buffer->overlays_after; |
1138e742 KR |
3522 | current_buffer->overlays_after = after_list; |
3523 | } | |
c2d5b10f | 3524 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3525 | } |
3b06f880 KH |
3526 | |
3527 | /* We have two types of overlay: the one whose ending marker is | |
3528 | after-insertion-marker (this is the usual case) and the one whose | |
3529 | ending marker is before-insertion-marker. When `overlays_before' | |
3530 | contains overlays of the latter type and the former type in this | |
3531 | order and both overlays end at inserting position, inserting a text | |
3532 | increases only the ending marker of the latter type, which results | |
3533 | in incorrect ordering of `overlays_before'. | |
3534 | ||
3535 | This function fixes ordering of overlays in the slot | |
3536 | `overlays_before' of the buffer *BP. Before the insertion, `point' | |
3537 | was at PREV, and now is at POS. */ | |
3538 | ||
01136e9b | 3539 | void |
3b06f880 KH |
3540 | fix_overlays_before (bp, prev, pos) |
3541 | struct buffer *bp; | |
c2d5b10f | 3542 | EMACS_INT prev, pos; |
3b06f880 | 3543 | { |
2410d73a SM |
3544 | /* If parent is nil, replace overlays_before; otherwise, parent->next. */ |
3545 | struct Lisp_Overlay *tail = bp->overlays_before, *parent = NULL, *right_pair; | |
3546 | Lisp_Object tem; | |
c2d5b10f | 3547 | EMACS_INT end; |
3b06f880 KH |
3548 | |
3549 | /* After the insertion, the several overlays may be in incorrect | |
3550 | order. The possibility is that, in the list `overlays_before', | |
3551 | an overlay which ends at POS appears after an overlay which ends | |
3552 | at PREV. Since POS is greater than PREV, we must fix the | |
3553 | ordering of these overlays, by moving overlays ends at POS before | |
3554 | the overlays ends at PREV. */ | |
3555 | ||
3556 | /* At first, find a place where disordered overlays should be linked | |
3557 | in. It is where an overlay which end before POS exists. (i.e. an | |
3558 | overlay whose ending marker is after-insertion-marker if disorder | |
3559 | exists). */ | |
2410d73a SM |
3560 | while (tail |
3561 | && (XSETMISC (tem, tail), | |
3562 | (end = OVERLAY_POSITION (OVERLAY_END (tem))) >= pos)) | |
1138e742 KR |
3563 | { |
3564 | parent = tail; | |
2410d73a | 3565 | tail = tail->next; |
1138e742 | 3566 | } |
3b06f880 KH |
3567 | |
3568 | /* If we don't find such an overlay, | |
3569 | or the found one ends before PREV, | |
3570 | or the found one is the last one in the list, | |
3571 | we don't have to fix anything. */ | |
f93ad4cf | 3572 | if (!tail || end < prev || !tail->next) |
3b06f880 KH |
3573 | return; |
3574 | ||
1138e742 KR |
3575 | right_pair = parent; |
3576 | parent = tail; | |
2410d73a | 3577 | tail = tail->next; |
3b06f880 | 3578 | |
1138e742 | 3579 | /* Now, end position of overlays in the list TAIL should be before |
3b06f880 | 3580 | or equal to PREV. In the loop, an overlay which ends at POS is |
1138e742 KR |
3581 | moved ahead to the place indicated by the CDR of RIGHT_PAIR. If |
3582 | we found an overlay which ends before PREV, the remaining | |
3583 | overlays are in correct order. */ | |
2410d73a | 3584 | while (tail) |
3b06f880 | 3585 | { |
2410d73a SM |
3586 | XSETMISC (tem, tail); |
3587 | end = OVERLAY_POSITION (OVERLAY_END (tem)); | |
3b06f880 KH |
3588 | |
3589 | if (end == pos) | |
3590 | { /* This overlay is disordered. */ | |
2410d73a | 3591 | struct Lisp_Overlay *found = tail; |
3b06f880 KH |
3592 | |
3593 | /* Unlink the found overlay. */ | |
2410d73a SM |
3594 | tail = found->next; |
3595 | parent->next = tail; | |
1138e742 KR |
3596 | /* Move an overlay at RIGHT_PLACE to the next of the found one, |
3597 | and link it into the right place. */ | |
2410d73a | 3598 | if (!right_pair) |
1138e742 | 3599 | { |
2410d73a | 3600 | found->next = bp->overlays_before; |
1138e742 KR |
3601 | bp->overlays_before = found; |
3602 | } | |
3603 | else | |
3604 | { | |
2410d73a SM |
3605 | found->next = right_pair->next; |
3606 | right_pair->next = found; | |
1138e742 | 3607 | } |
3b06f880 KH |
3608 | } |
3609 | else if (end == prev) | |
1138e742 KR |
3610 | { |
3611 | parent = tail; | |
2410d73a | 3612 | tail = tail->next; |
1138e742 | 3613 | } |
3b06f880 KH |
3614 | else /* No more disordered overlay. */ |
3615 | break; | |
3616 | } | |
3617 | } | |
2eec3b4e | 3618 | \f |
52f8ec73 | 3619 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
7ee72033 MB |
3620 | doc: /* Return t if OBJECT is an overlay. */) |
3621 | (object) | |
52f8ec73 JB |
3622 | Lisp_Object object; |
3623 | { | |
3624 | return (OVERLAYP (object) ? Qt : Qnil); | |
3625 | } | |
3626 | ||
acac2700 | 3627 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 5, 0, |
7ee72033 | 3628 | doc: /* Create a new overlay with range BEG to END in BUFFER. |
018ba359 PJ |
3629 | If omitted, BUFFER defaults to the current buffer. |
3630 | BEG and END may be integers or markers. | |
a625ee20 RS |
3631 | The fourth arg FRONT-ADVANCE, if non-nil, makes the marker |
3632 | for the front of the overlay advance when text is inserted there | |
63af6055 | 3633 | \(which means the text *is not* included in the overlay). |
a625ee20 RS |
3634 | The fifth arg REAR-ADVANCE, if non-nil, makes the marker |
3635 | for the rear of the overlay advance when text is inserted there | |
63af6055 | 3636 | \(which means the text *is* included in the overlay). */) |
7ee72033 | 3637 | (beg, end, buffer, front_advance, rear_advance) |
5c4f68f1 | 3638 | Lisp_Object beg, end, buffer; |
acac2700 | 3639 | Lisp_Object front_advance, rear_advance; |
2eec3b4e RS |
3640 | { |
3641 | Lisp_Object overlay; | |
5c4f68f1 | 3642 | struct buffer *b; |
2eec3b4e | 3643 | |
5c4f68f1 | 3644 | if (NILP (buffer)) |
67180c6a | 3645 | XSETBUFFER (buffer, current_buffer); |
883047b9 | 3646 | else |
b7826503 | 3647 | CHECK_BUFFER (buffer); |
883047b9 JB |
3648 | if (MARKERP (beg) |
3649 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3650 | error ("Marker points into wrong buffer"); | |
3651 | if (MARKERP (end) | |
3652 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3653 | error ("Marker points into wrong buffer"); | |
2eec3b4e | 3654 | |
b7826503 PJ |
3655 | CHECK_NUMBER_COERCE_MARKER (beg); |
3656 | CHECK_NUMBER_COERCE_MARKER (end); | |
5c4f68f1 | 3657 | |
883047b9 | 3658 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 3659 | { |
c99fc30f KH |
3660 | Lisp_Object temp; |
3661 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 3662 | } |
883047b9 JB |
3663 | |
3664 | b = XBUFFER (buffer); | |
3665 | ||
3666 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
3667 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 | 3668 | |
acac2700 RS |
3669 | if (!NILP (front_advance)) |
3670 | XMARKER (beg)->insertion_type = 1; | |
3671 | if (!NILP (rear_advance)) | |
3672 | XMARKER (end)->insertion_type = 1; | |
597dd755 | 3673 | |
48e2e3ba | 3674 | overlay = allocate_misc (); |
89ca3e1b | 3675 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; |
48e2e3ba KH |
3676 | XOVERLAY (overlay)->start = beg; |
3677 | XOVERLAY (overlay)->end = end; | |
3678 | XOVERLAY (overlay)->plist = Qnil; | |
2410d73a | 3679 | XOVERLAY (overlay)->next = NULL; |
2eec3b4e | 3680 | |
177c0ea7 | 3681 | /* Put the new overlay on the wrong list. */ |
2eec3b4e | 3682 | end = OVERLAY_END (overlay); |
c2d5b10f | 3683 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a SM |
3684 | { |
3685 | if (b->overlays_after) | |
3686 | XOVERLAY (overlay)->next = b->overlays_after; | |
3687 | b->overlays_after = XOVERLAY (overlay); | |
3688 | } | |
2eec3b4e | 3689 | else |
2410d73a SM |
3690 | { |
3691 | if (b->overlays_before) | |
3692 | XOVERLAY (overlay)->next = b->overlays_before; | |
3693 | b->overlays_before = XOVERLAY (overlay); | |
3694 | } | |
2eec3b4e RS |
3695 | |
3696 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3697 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3698 | |
b61982dd JB |
3699 | /* We don't need to redisplay the region covered by the overlay, because |
3700 | the overlay has no properties at the moment. */ | |
3701 | ||
2eec3b4e RS |
3702 | return overlay; |
3703 | } | |
876aa27c RS |
3704 | \f |
3705 | /* Mark a section of BUF as needing redisplay because of overlays changes. */ | |
3706 | ||
3707 | static void | |
3708 | modify_overlay (buf, start, end) | |
3709 | struct buffer *buf; | |
c2d5b10f | 3710 | EMACS_INT start, end; |
876aa27c | 3711 | { |
876aa27c RS |
3712 | if (start > end) |
3713 | { | |
3714 | int temp = start; | |
26f545d7 GM |
3715 | start = end; |
3716 | end = temp; | |
876aa27c RS |
3717 | } |
3718 | ||
481b5054 | 3719 | BUF_COMPUTE_UNCHANGED (buf, start, end); |
177c0ea7 | 3720 | |
876aa27c RS |
3721 | /* If this is a buffer not in the selected window, |
3722 | we must do other windows. */ | |
3723 | if (buf != XBUFFER (XWINDOW (selected_window)->buffer)) | |
3724 | windows_or_buffers_changed = 1; | |
876aa27c RS |
3725 | /* If multiple windows show this buffer, we must do other windows. */ |
3726 | else if (buffer_shared > 1) | |
3727 | windows_or_buffers_changed = 1; | |
18700091 KS |
3728 | /* If we modify an overlay at the end of the buffer, we cannot |
3729 | be sure that window end is still valid. */ | |
3730 | else if (end >= ZV && start <= ZV) | |
3731 | windows_or_buffers_changed = 1; | |
876aa27c | 3732 | |
d8b9150f | 3733 | ++BUF_OVERLAY_MODIFF (buf); |
876aa27c | 3734 | } |
2eec3b4e | 3735 | |
018ba359 | 3736 | \f |
2e34157c RS |
3737 | Lisp_Object Fdelete_overlay (); |
3738 | ||
2410d73a SM |
3739 | static struct Lisp_Overlay * |
3740 | unchain_overlay (list, overlay) | |
3741 | struct Lisp_Overlay *list, *overlay; | |
3742 | { | |
3743 | struct Lisp_Overlay *tmp, *prev; | |
3744 | for (tmp = list, prev = NULL; tmp; prev = tmp, tmp = tmp->next) | |
3745 | if (tmp == overlay) | |
3746 | { | |
3747 | if (prev) | |
3748 | prev->next = tmp->next; | |
3749 | else | |
3750 | list = tmp->next; | |
3751 | overlay->next = NULL; | |
3752 | break; | |
3753 | } | |
3754 | return list; | |
3755 | } | |
3756 | ||
5c4f68f1 | 3757 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
7ee72033 | 3758 | doc: /* Set the endpoints of OVERLAY to BEG and END in BUFFER. |
018ba359 PJ |
3759 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now. |
3760 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current | |
7ee72033 MB |
3761 | buffer. */) |
3762 | (overlay, beg, end, buffer) | |
5c4f68f1 | 3763 | Lisp_Object overlay, beg, end, buffer; |
2eec3b4e | 3764 | { |
0a4469c9 RS |
3765 | struct buffer *b, *ob; |
3766 | Lisp_Object obuffer; | |
aed13378 | 3767 | int count = SPECPDL_INDEX (); |
5c4f68f1 | 3768 | |
b7826503 | 3769 | CHECK_OVERLAY (overlay); |
5c4f68f1 JB |
3770 | if (NILP (buffer)) |
3771 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a | 3772 | if (NILP (buffer)) |
67180c6a | 3773 | XSETBUFFER (buffer, current_buffer); |
b7826503 | 3774 | CHECK_BUFFER (buffer); |
883047b9 JB |
3775 | |
3776 | if (MARKERP (beg) | |
3777 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3778 | error ("Marker points into wrong buffer"); | |
3779 | if (MARKERP (end) | |
3780 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3781 | error ("Marker points into wrong buffer"); | |
3782 | ||
b7826503 PJ |
3783 | CHECK_NUMBER_COERCE_MARKER (beg); |
3784 | CHECK_NUMBER_COERCE_MARKER (end); | |
b61982dd | 3785 | |
9d7608b7 KH |
3786 | if (XINT (beg) == XINT (end) && ! NILP (Foverlay_get (overlay, Qevaporate))) |
3787 | return Fdelete_overlay (overlay); | |
0a4469c9 | 3788 | |
b61982dd JB |
3789 | if (XINT (beg) > XINT (end)) |
3790 | { | |
c99fc30f KH |
3791 | Lisp_Object temp; |
3792 | temp = beg; beg = end; end = temp; | |
b61982dd JB |
3793 | } |
3794 | ||
9d7608b7 KH |
3795 | specbind (Qinhibit_quit, Qt); |
3796 | ||
0a4469c9 | 3797 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
5c4f68f1 | 3798 | b = XBUFFER (buffer); |
8801a864 | 3799 | ob = BUFFERP (obuffer) ? XBUFFER (obuffer) : (struct buffer *) 0; |
2eec3b4e | 3800 | |
c82ed728 | 3801 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 3802 | if (!EQ (buffer, obuffer)) |
50760c4a RS |
3803 | { |
3804 | /* Redisplay where the overlay was. */ | |
3805 | if (!NILP (obuffer)) | |
3806 | { | |
2e34157c RS |
3807 | int o_beg; |
3808 | int o_end; | |
50760c4a | 3809 | |
80509f2f RS |
3810 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3811 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
50760c4a | 3812 | |
2e34157c | 3813 | modify_overlay (ob, o_beg, o_end); |
50760c4a RS |
3814 | } |
3815 | ||
3816 | /* Redisplay where the overlay is going to be. */ | |
876aa27c | 3817 | modify_overlay (b, XINT (beg), XINT (end)); |
50760c4a | 3818 | } |
c82ed728 JB |
3819 | else |
3820 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
3821 | { | |
2e34157c | 3822 | int o_beg, o_end; |
c82ed728 | 3823 | |
80509f2f RS |
3824 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3825 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
c82ed728 | 3826 | |
2e34157c RS |
3827 | if (o_beg == XINT (beg)) |
3828 | modify_overlay (b, o_end, XINT (end)); | |
3829 | else if (o_end == XINT (end)) | |
3830 | modify_overlay (b, o_beg, XINT (beg)); | |
c82ed728 JB |
3831 | else |
3832 | { | |
2e34157c RS |
3833 | if (XINT (beg) < o_beg) o_beg = XINT (beg); |
3834 | if (XINT (end) > o_end) o_end = XINT (end); | |
3835 | modify_overlay (b, o_beg, o_end); | |
c82ed728 JB |
3836 | } |
3837 | } | |
b61982dd | 3838 | |
0a4469c9 RS |
3839 | if (!NILP (obuffer)) |
3840 | { | |
2410d73a SM |
3841 | ob->overlays_before |
3842 | = unchain_overlay (ob->overlays_before, XOVERLAY (overlay)); | |
3843 | ob->overlays_after | |
3844 | = unchain_overlay (ob->overlays_after, XOVERLAY (overlay)); | |
3845 | eassert (XOVERLAY (overlay)->next == NULL); | |
0a4469c9 | 3846 | } |
5c4f68f1 JB |
3847 | |
3848 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
3849 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
2eec3b4e | 3850 | |
177c0ea7 | 3851 | /* Put the overlay on the wrong list. */ |
2eec3b4e | 3852 | end = OVERLAY_END (overlay); |
c2d5b10f | 3853 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a | 3854 | { |
8f924df7 KH |
3855 | XOVERLAY (overlay)->next = b->overlays_after; |
3856 | b->overlays_after = XOVERLAY (overlay); | |
2410d73a | 3857 | } |
2eec3b4e | 3858 | else |
2410d73a | 3859 | { |
8f924df7 KH |
3860 | XOVERLAY (overlay)->next = b->overlays_before; |
3861 | b->overlays_before = XOVERLAY (overlay); | |
2410d73a | 3862 | } |
2eec3b4e RS |
3863 | |
3864 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3865 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3866 | |
0a4469c9 | 3867 | return unbind_to (count, overlay); |
2eec3b4e RS |
3868 | } |
3869 | ||
3870 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
7ee72033 MB |
3871 | doc: /* Delete the overlay OVERLAY from its buffer. */) |
3872 | (overlay) | |
5c4f68f1 | 3873 | Lisp_Object overlay; |
2eec3b4e | 3874 | { |
0a4469c9 | 3875 | Lisp_Object buffer; |
5c4f68f1 | 3876 | struct buffer *b; |
aed13378 | 3877 | int count = SPECPDL_INDEX (); |
5c4f68f1 | 3878 | |
b7826503 | 3879 | CHECK_OVERLAY (overlay); |
52f8ec73 | 3880 | |
0a4469c9 RS |
3881 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
3882 | if (NILP (buffer)) | |
3883 | return Qnil; | |
3884 | ||
3885 | b = XBUFFER (buffer); | |
0a4469c9 | 3886 | specbind (Qinhibit_quit, Qt); |
177c0ea7 | 3887 | |
2410d73a SM |
3888 | b->overlays_before = unchain_overlay (b->overlays_before,XOVERLAY (overlay)); |
3889 | b->overlays_after = unchain_overlay (b->overlays_after, XOVERLAY (overlay)); | |
3890 | eassert (XOVERLAY (overlay)->next == NULL); | |
876aa27c | 3891 | modify_overlay (b, |
8231a9aa RS |
3892 | marker_position (OVERLAY_START (overlay)), |
3893 | marker_position (OVERLAY_END (overlay))); | |
3ece337a JB |
3894 | Fset_marker (OVERLAY_START (overlay), Qnil, Qnil); |
3895 | Fset_marker (OVERLAY_END (overlay), Qnil, Qnil); | |
3896 | ||
e58c389d | 3897 | /* When deleting an overlay with before or after strings, turn off |
26f545d7 GM |
3898 | display optimizations for the affected buffer, on the basis that |
3899 | these strings may contain newlines. This is easier to do than to | |
3900 | check for that situation during redisplay. */ | |
3901 | if (!windows_or_buffers_changed | |
3902 | && (!NILP (Foverlay_get (overlay, Qbefore_string)) | |
3903 | || !NILP (Foverlay_get (overlay, Qafter_string)))) | |
3904 | b->prevent_redisplay_optimizations_p = 1; | |
3905 | ||
0a4469c9 | 3906 | return unbind_to (count, Qnil); |
2eec3b4e RS |
3907 | } |
3908 | \f | |
8ebafa8d JB |
3909 | /* Overlay dissection functions. */ |
3910 | ||
3911 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, | |
7ee72033 MB |
3912 | doc: /* Return the position at which OVERLAY starts. */) |
3913 | (overlay) | |
8ebafa8d JB |
3914 | Lisp_Object overlay; |
3915 | { | |
b7826503 | 3916 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3917 | |
3918 | return (Fmarker_position (OVERLAY_START (overlay))); | |
3919 | } | |
3920 | ||
3921 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, | |
7ee72033 MB |
3922 | doc: /* Return the position at which OVERLAY ends. */) |
3923 | (overlay) | |
8ebafa8d JB |
3924 | Lisp_Object overlay; |
3925 | { | |
b7826503 | 3926 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3927 | |
3928 | return (Fmarker_position (OVERLAY_END (overlay))); | |
3929 | } | |
3930 | ||
3931 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
563f7128 LK |
3932 | doc: /* Return the buffer OVERLAY belongs to. |
3933 | Return nil if OVERLAY has been deleted. */) | |
7ee72033 | 3934 | (overlay) |
8ebafa8d JB |
3935 | Lisp_Object overlay; |
3936 | { | |
b7826503 | 3937 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3938 | |
3939 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
3940 | } | |
3941 | ||
3942 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
7ee72033 | 3943 | doc: /* Return a list of the properties on OVERLAY. |
018ba359 | 3944 | This is a copy of OVERLAY's plist; modifying its conses has no effect on |
7ee72033 MB |
3945 | OVERLAY. */) |
3946 | (overlay) | |
8ebafa8d JB |
3947 | Lisp_Object overlay; |
3948 | { | |
b7826503 | 3949 | CHECK_OVERLAY (overlay); |
8ebafa8d | 3950 | |
48e2e3ba | 3951 | return Fcopy_sequence (XOVERLAY (overlay)->plist); |
8ebafa8d JB |
3952 | } |
3953 | ||
3954 | \f | |
2eec3b4e | 3955 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
7ee72033 MB |
3956 | doc: /* Return a list of the overlays that contain position POS. */) |
3957 | (pos) | |
2eec3b4e RS |
3958 | Lisp_Object pos; |
3959 | { | |
3960 | int noverlays; | |
2eec3b4e RS |
3961 | Lisp_Object *overlay_vec; |
3962 | int len; | |
3963 | Lisp_Object result; | |
3964 | ||
b7826503 | 3965 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
3966 | |
3967 | len = 10; | |
a9800ae8 | 3968 | /* We can't use alloca here because overlays_at can call xrealloc. */ |
2eec3b4e RS |
3969 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); |
3970 | ||
3971 | /* Put all the overlays we want in a vector in overlay_vec. | |
3972 | Store the length in len. */ | |
2a77a7d7 | 3973 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
ac869cf7 | 3974 | (int *) 0, (int *) 0, 0); |
2eec3b4e RS |
3975 | |
3976 | /* Make a list of them all. */ | |
3977 | result = Flist (noverlays, overlay_vec); | |
3978 | ||
9ac0d9e0 | 3979 | xfree (overlay_vec); |
2eec3b4e RS |
3980 | return result; |
3981 | } | |
3982 | ||
74514898 | 3983 | DEFUN ("overlays-in", Foverlays_in, Soverlays_in, 2, 2, 0, |
7ee72033 | 3984 | doc: /* Return a list of the overlays that overlap the region BEG ... END. |
018ba359 PJ |
3985 | Overlap means that at least one character is contained within the overlay |
3986 | and also contained within the specified region. | |
3987 | Empty overlays are included in the result if they are located at BEG | |
7ee72033 MB |
3988 | or between BEG and END. */) |
3989 | (beg, end) | |
74514898 RS |
3990 | Lisp_Object beg, end; |
3991 | { | |
3992 | int noverlays; | |
3993 | Lisp_Object *overlay_vec; | |
3994 | int len; | |
3995 | Lisp_Object result; | |
3996 | ||
b7826503 PJ |
3997 | CHECK_NUMBER_COERCE_MARKER (beg); |
3998 | CHECK_NUMBER_COERCE_MARKER (end); | |
74514898 RS |
3999 | |
4000 | len = 10; | |
4001 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
4002 | ||
4003 | /* Put all the overlays we want in a vector in overlay_vec. | |
4004 | Store the length in len. */ | |
4005 | noverlays = overlays_in (XINT (beg), XINT (end), 1, &overlay_vec, &len, | |
4006 | (int *) 0, (int *) 0); | |
4007 | ||
4008 | /* Make a list of them all. */ | |
4009 | result = Flist (noverlays, overlay_vec); | |
4010 | ||
4011 | xfree (overlay_vec); | |
4012 | return result; | |
4013 | } | |
4014 | ||
2eec3b4e | 4015 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, |
efc7e75f | 4016 | 1, 1, 0, |
7ee72033 | 4017 | doc: /* Return the next position after POS where an overlay starts or ends. |
624d2678 RS |
4018 | If there are no overlay boundaries from POS to (point-max), |
4019 | the value is (point-max). */) | |
7ee72033 | 4020 | (pos) |
2eec3b4e RS |
4021 | Lisp_Object pos; |
4022 | { | |
4023 | int noverlays; | |
4024 | int endpos; | |
4025 | Lisp_Object *overlay_vec; | |
4026 | int len; | |
2eec3b4e RS |
4027 | int i; |
4028 | ||
b7826503 | 4029 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
4030 | |
4031 | len = 10; | |
4032 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
4033 | ||
4034 | /* Put all the overlays we want in a vector in overlay_vec. | |
4035 | Store the length in len. | |
4036 | endpos gets the position where the next overlay starts. */ | |
2a77a7d7 | 4037 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
ac869cf7 | 4038 | &endpos, (int *) 0, 1); |
2eec3b4e RS |
4039 | |
4040 | /* If any of these overlays ends before endpos, | |
4041 | use its ending point instead. */ | |
4042 | for (i = 0; i < noverlays; i++) | |
4043 | { | |
4044 | Lisp_Object oend; | |
4045 | int oendpos; | |
4046 | ||
4047 | oend = OVERLAY_END (overlay_vec[i]); | |
4048 | oendpos = OVERLAY_POSITION (oend); | |
4049 | if (oendpos < endpos) | |
4050 | endpos = oendpos; | |
1ab256cb RM |
4051 | } |
4052 | ||
9ac0d9e0 | 4053 | xfree (overlay_vec); |
2eec3b4e RS |
4054 | return make_number (endpos); |
4055 | } | |
239c932b RS |
4056 | |
4057 | DEFUN ("previous-overlay-change", Fprevious_overlay_change, | |
4058 | Sprevious_overlay_change, 1, 1, 0, | |
7ee72033 | 4059 | doc: /* Return the previous position before POS where an overlay starts or ends. |
624d2678 RS |
4060 | If there are no overlay boundaries from (point-min) to POS, |
4061 | the value is (point-min). */) | |
7ee72033 | 4062 | (pos) |
239c932b RS |
4063 | Lisp_Object pos; |
4064 | { | |
4065 | int noverlays; | |
4066 | int prevpos; | |
4067 | Lisp_Object *overlay_vec; | |
4068 | int len; | |
239c932b | 4069 | |
b7826503 | 4070 | CHECK_NUMBER_COERCE_MARKER (pos); |
239c932b | 4071 | |
624bbdc4 RS |
4072 | /* At beginning of buffer, we know the answer; |
4073 | avoid bug subtracting 1 below. */ | |
4074 | if (XINT (pos) == BEGV) | |
4075 | return pos; | |
4076 | ||
017f0539 GM |
4077 | len = 10; |
4078 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
4079 | ||
239c932b RS |
4080 | /* Put all the overlays we want in a vector in overlay_vec. |
4081 | Store the length in len. | |
daa1c109 | 4082 | prevpos gets the position of the previous change. */ |
2a77a7d7 | 4083 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
ac869cf7 | 4084 | (int *) 0, &prevpos, 1); |
239c932b | 4085 | |
239c932b RS |
4086 | xfree (overlay_vec); |
4087 | return make_number (prevpos); | |
4088 | } | |
2eec3b4e RS |
4089 | \f |
4090 | /* These functions are for debugging overlays. */ | |
4091 | ||
4092 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
7ee72033 | 4093 | doc: /* Return a pair of lists giving all the overlays of the current buffer. |
018ba359 PJ |
4094 | The car has all the overlays before the overlay center; |
4095 | the cdr has all the overlays after the overlay center. | |
4096 | Recentering overlays moves overlays between these lists. | |
4097 | The lists you get are copies, so that changing them has no effect. | |
7ee72033 MB |
4098 | However, the overlays you get are the real objects that the buffer uses. */) |
4099 | () | |
2eec3b4e | 4100 | { |
2410d73a SM |
4101 | struct Lisp_Overlay *ol; |
4102 | Lisp_Object before = Qnil, after = Qnil, tmp; | |
4103 | for (ol = current_buffer->overlays_before; ol; ol = ol->next) | |
4104 | { | |
4105 | XSETMISC (tmp, ol); | |
4106 | before = Fcons (tmp, before); | |
4107 | } | |
4108 | for (ol = current_buffer->overlays_after; ol; ol = ol->next) | |
4109 | { | |
4110 | XSETMISC (tmp, ol); | |
4111 | after = Fcons (tmp, after); | |
4112 | } | |
4113 | return Fcons (Fnreverse (before), Fnreverse (after)); | |
2eec3b4e RS |
4114 | } |
4115 | ||
4116 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
c87426c5 RS |
4117 | doc: /* Recenter the overlays of the current buffer around position POS. |
4118 | That makes overlay lookup faster for positions near POS (but perhaps slower | |
4119 | for positions far away from POS). */) | |
7ee72033 | 4120 | (pos) |
2eec3b4e RS |
4121 | Lisp_Object pos; |
4122 | { | |
b7826503 | 4123 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e | 4124 | |
5c4f68f1 | 4125 | recenter_overlay_lists (current_buffer, XINT (pos)); |
2eec3b4e RS |
4126 | return Qnil; |
4127 | } | |
4128 | \f | |
4129 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, | |
7ee72033 MB |
4130 | doc: /* Get the property of overlay OVERLAY with property name PROP. */) |
4131 | (overlay, prop) | |
2eec3b4e RS |
4132 | Lisp_Object overlay, prop; |
4133 | { | |
b7826503 | 4134 | CHECK_OVERLAY (overlay); |
9a593927 | 4135 | return lookup_char_property (XOVERLAY (overlay)->plist, prop, 0); |
2eec3b4e RS |
4136 | } |
4137 | ||
4138 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
7ee72033 MB |
4139 | doc: /* Set one property of overlay OVERLAY: give property PROP value VALUE. */) |
4140 | (overlay, prop, value) | |
2eec3b4e RS |
4141 | Lisp_Object overlay, prop, value; |
4142 | { | |
48e2e3ba | 4143 | Lisp_Object tail, buffer; |
9d7608b7 | 4144 | int changed; |
2eec3b4e | 4145 | |
b7826503 | 4146 | CHECK_OVERLAY (overlay); |
b61982dd | 4147 | |
274a9425 RS |
4148 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
4149 | ||
48e2e3ba | 4150 | for (tail = XOVERLAY (overlay)->plist; |
7539e11f KR |
4151 | CONSP (tail) && CONSP (XCDR (tail)); |
4152 | tail = XCDR (XCDR (tail))) | |
4153 | if (EQ (XCAR (tail), prop)) | |
274a9425 | 4154 | { |
7539e11f | 4155 | changed = !EQ (XCAR (XCDR (tail)), value); |
f3fbd155 | 4156 | XSETCAR (XCDR (tail), value); |
9d7608b7 | 4157 | goto found; |
274a9425 | 4158 | } |
9d7608b7 KH |
4159 | /* It wasn't in the list, so add it to the front. */ |
4160 | changed = !NILP (value); | |
48e2e3ba KH |
4161 | XOVERLAY (overlay)->plist |
4162 | = Fcons (prop, Fcons (value, XOVERLAY (overlay)->plist)); | |
9d7608b7 KH |
4163 | found: |
4164 | if (! NILP (buffer)) | |
4165 | { | |
4166 | if (changed) | |
876aa27c | 4167 | modify_overlay (XBUFFER (buffer), |
26f545d7 GM |
4168 | marker_position (OVERLAY_START (overlay)), |
4169 | marker_position (OVERLAY_END (overlay))); | |
9d7608b7 KH |
4170 | if (EQ (prop, Qevaporate) && ! NILP (value) |
4171 | && (OVERLAY_POSITION (OVERLAY_START (overlay)) | |
4172 | == OVERLAY_POSITION (OVERLAY_END (overlay)))) | |
4173 | Fdelete_overlay (overlay); | |
4174 | } | |
7d63db98 | 4175 | |
2eec3b4e | 4176 | return value; |
1ab256cb RM |
4177 | } |
4178 | \f | |
9115729e KH |
4179 | /* Subroutine of report_overlay_modification. */ |
4180 | ||
4181 | /* Lisp vector holding overlay hook functions to call. | |
4182 | Vector elements come in pairs. | |
4183 | Each even-index element is a list of hook functions. | |
4184 | The following odd-index element is the overlay they came from. | |
4185 | ||
4186 | Before the buffer change, we fill in this vector | |
4187 | as we call overlay hook functions. | |
4188 | After the buffer change, we get the functions to call from this vector. | |
4189 | This way we always call the same functions before and after the change. */ | |
4190 | static Lisp_Object last_overlay_modification_hooks; | |
4191 | ||
4192 | /* Number of elements actually used in last_overlay_modification_hooks. */ | |
4193 | static int last_overlay_modification_hooks_used; | |
4194 | ||
4195 | /* Add one functionlist/overlay pair | |
4196 | to the end of last_overlay_modification_hooks. */ | |
4197 | ||
4198 | static void | |
4199 | add_overlay_mod_hooklist (functionlist, overlay) | |
4200 | Lisp_Object functionlist, overlay; | |
4201 | { | |
4202 | int oldsize = XVECTOR (last_overlay_modification_hooks)->size; | |
4203 | ||
4204 | if (last_overlay_modification_hooks_used == oldsize) | |
4205 | { | |
4206 | Lisp_Object old; | |
4207 | old = last_overlay_modification_hooks; | |
4208 | last_overlay_modification_hooks | |
4209 | = Fmake_vector (make_number (oldsize * 2), Qnil); | |
0b1f1b09 RS |
4210 | bcopy (XVECTOR (old)->contents, |
4211 | XVECTOR (last_overlay_modification_hooks)->contents, | |
9115729e KH |
4212 | sizeof (Lisp_Object) * oldsize); |
4213 | } | |
2410d73a SM |
4214 | AREF (last_overlay_modification_hooks, last_overlay_modification_hooks_used++) = functionlist; |
4215 | AREF (last_overlay_modification_hooks, last_overlay_modification_hooks_used++) = overlay; | |
9115729e KH |
4216 | } |
4217 | \f | |
173f2a64 RS |
4218 | /* Run the modification-hooks of overlays that include |
4219 | any part of the text in START to END. | |
9115729e KH |
4220 | If this change is an insertion, also |
4221 | run the insert-before-hooks of overlay starting at END, | |
930a9140 RS |
4222 | and the insert-after-hooks of overlay ending at START. |
4223 | ||
4224 | This is called both before and after the modification. | |
4225 | AFTER is nonzero when we call after the modification. | |
4226 | ||
9115729e KH |
4227 | ARG1, ARG2, ARG3 are arguments to pass to the hook functions. |
4228 | When AFTER is nonzero, they are the start position, | |
4229 | the position after the inserted new text, | |
4230 | and the length of deleted or replaced old text. */ | |
173f2a64 RS |
4231 | |
4232 | void | |
930a9140 | 4233 | report_overlay_modification (start, end, after, arg1, arg2, arg3) |
173f2a64 | 4234 | Lisp_Object start, end; |
930a9140 RS |
4235 | int after; |
4236 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 | 4237 | { |
2410d73a SM |
4238 | Lisp_Object prop, overlay; |
4239 | struct Lisp_Overlay *tail; | |
9115729e KH |
4240 | /* 1 if this change is an insertion. */ |
4241 | int insertion = (after ? XFASTINT (arg3) == 0 : EQ (start, end)); | |
a615c6dc | 4242 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
55b48893 RS |
4243 | |
4244 | overlay = Qnil; | |
2410d73a | 4245 | tail = NULL; |
9115729e | 4246 | |
27c6b98e SM |
4247 | /* We used to run the functions as soon as we found them and only register |
4248 | them in last_overlay_modification_hooks for the purpose of the `after' | |
4249 | case. But running elisp code as we traverse the list of overlays is | |
4250 | painful because the list can be modified by the elisp code so we had to | |
4251 | copy at several places. We now simply do a read-only traversal that | |
4252 | only collects the functions to run and we run them afterwards. It's | |
4253 | simpler, especially since all the code was already there. -stef */ | |
4254 | ||
a615c6dc | 4255 | if (!after) |
173f2a64 | 4256 | { |
a615c6dc SM |
4257 | /* We are being called before a change. |
4258 | Scan the overlays to find the functions to call. */ | |
4259 | last_overlay_modification_hooks_used = 0; | |
2410d73a | 4260 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
173f2a64 | 4261 | { |
a615c6dc SM |
4262 | int startpos, endpos; |
4263 | Lisp_Object ostart, oend; | |
4264 | ||
2410d73a | 4265 | XSETMISC (overlay, tail); |
a615c6dc SM |
4266 | |
4267 | ostart = OVERLAY_START (overlay); | |
4268 | oend = OVERLAY_END (overlay); | |
4269 | endpos = OVERLAY_POSITION (oend); | |
4270 | if (XFASTINT (start) > endpos) | |
4271 | break; | |
4272 | startpos = OVERLAY_POSITION (ostart); | |
4273 | if (insertion && (XFASTINT (start) == startpos | |
4274 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4275 | { |
a615c6dc SM |
4276 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4277 | if (!NILP (prop)) | |
4278 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4279 | } |
a615c6dc SM |
4280 | if (insertion && (XFASTINT (start) == endpos |
4281 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4282 | { |
a615c6dc SM |
4283 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4284 | if (!NILP (prop)) | |
4285 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4286 | } |
a615c6dc SM |
4287 | /* Test for intersecting intervals. This does the right thing |
4288 | for both insertion and deletion. */ | |
4289 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4290 | { |
a615c6dc SM |
4291 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4292 | if (!NILP (prop)) | |
4293 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4294 | } |
173f2a64 | 4295 | } |
60ebfdf3 | 4296 | |
2410d73a | 4297 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
173f2a64 | 4298 | { |
a615c6dc SM |
4299 | int startpos, endpos; |
4300 | Lisp_Object ostart, oend; | |
4301 | ||
2410d73a | 4302 | XSETMISC (overlay, tail); |
a615c6dc SM |
4303 | |
4304 | ostart = OVERLAY_START (overlay); | |
4305 | oend = OVERLAY_END (overlay); | |
4306 | startpos = OVERLAY_POSITION (ostart); | |
4307 | endpos = OVERLAY_POSITION (oend); | |
4308 | if (XFASTINT (end) < startpos) | |
4309 | break; | |
4310 | if (insertion && (XFASTINT (start) == startpos | |
4311 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4312 | { |
a615c6dc SM |
4313 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4314 | if (!NILP (prop)) | |
4315 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4316 | } |
a615c6dc SM |
4317 | if (insertion && (XFASTINT (start) == endpos |
4318 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4319 | { |
a615c6dc SM |
4320 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4321 | if (!NILP (prop)) | |
4322 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4323 | } |
a615c6dc SM |
4324 | /* Test for intersecting intervals. This does the right thing |
4325 | for both insertion and deletion. */ | |
4326 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4327 | { |
a615c6dc SM |
4328 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4329 | if (!NILP (prop)) | |
4330 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4331 | } |
173f2a64 RS |
4332 | } |
4333 | } | |
55b48893 | 4334 | |
a615c6dc SM |
4335 | GCPRO4 (overlay, arg1, arg2, arg3); |
4336 | { | |
4337 | /* Call the functions recorded in last_overlay_modification_hooks. | |
4338 | First copy the vector contents, in case some of these hooks | |
4339 | do subsequent modification of the buffer. */ | |
4340 | int size = last_overlay_modification_hooks_used; | |
4341 | Lisp_Object *copy = (Lisp_Object *) alloca (size * sizeof (Lisp_Object)); | |
4342 | int i; | |
4343 | ||
4344 | bcopy (XVECTOR (last_overlay_modification_hooks)->contents, | |
4345 | copy, size * sizeof (Lisp_Object)); | |
4346 | gcpro1.var = copy; | |
4347 | gcpro1.nvars = size; | |
4348 | ||
4349 | for (i = 0; i < size;) | |
4350 | { | |
4351 | Lisp_Object prop, overlay; | |
4352 | prop = copy[i++]; | |
4353 | overlay = copy[i++]; | |
4354 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); | |
4355 | } | |
4356 | } | |
55b48893 | 4357 | UNGCPRO; |
173f2a64 RS |
4358 | } |
4359 | ||
4360 | static void | |
930a9140 RS |
4361 | call_overlay_mod_hooks (list, overlay, after, arg1, arg2, arg3) |
4362 | Lisp_Object list, overlay; | |
4363 | int after; | |
4364 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 | 4365 | { |
930a9140 | 4366 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
9115729e | 4367 | |
930a9140 | 4368 | GCPRO4 (list, arg1, arg2, arg3); |
9115729e | 4369 | |
6d70a280 | 4370 | while (CONSP (list)) |
173f2a64 | 4371 | { |
930a9140 | 4372 | if (NILP (arg3)) |
6d70a280 | 4373 | call4 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2); |
930a9140 | 4374 | else |
6d70a280 SM |
4375 | call5 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2, arg3); |
4376 | list = XCDR (list); | |
173f2a64 RS |
4377 | } |
4378 | UNGCPRO; | |
4379 | } | |
9d7608b7 KH |
4380 | |
4381 | /* Delete any zero-sized overlays at position POS, if the `evaporate' | |
4382 | property is set. */ | |
4383 | void | |
4384 | evaporate_overlays (pos) | |
c2d5b10f | 4385 | EMACS_INT pos; |
9d7608b7 | 4386 | { |
2410d73a SM |
4387 | Lisp_Object overlay, hit_list; |
4388 | struct Lisp_Overlay *tail; | |
9d7608b7 KH |
4389 | |
4390 | hit_list = Qnil; | |
c2d5b10f | 4391 | if (pos <= current_buffer->overlay_center) |
2410d73a | 4392 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
9d7608b7 KH |
4393 | { |
4394 | int endpos; | |
2410d73a | 4395 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4396 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
4397 | if (endpos < pos) | |
4398 | break; | |
4399 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos | |
c3935f9d | 4400 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4401 | hit_list = Fcons (overlay, hit_list); |
4402 | } | |
4403 | else | |
2410d73a | 4404 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
9d7608b7 KH |
4405 | { |
4406 | int startpos; | |
2410d73a | 4407 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4408 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
4409 | if (startpos > pos) | |
4410 | break; | |
4411 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos | |
c3935f9d | 4412 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4413 | hit_list = Fcons (overlay, hit_list); |
4414 | } | |
7539e11f KR |
4415 | for (; CONSP (hit_list); hit_list = XCDR (hit_list)) |
4416 | Fdelete_overlay (XCAR (hit_list)); | |
9d7608b7 | 4417 | } |
173f2a64 | 4418 | \f |
54dfdeb0 | 4419 | /* Somebody has tried to store a value with an unacceptable type |
1bf08baf KH |
4420 | in the slot with offset OFFSET. */ |
4421 | ||
0fa3ba92 | 4422 | void |
54dfdeb0 KH |
4423 | buffer_slot_type_mismatch (offset) |
4424 | int offset; | |
0fa3ba92 | 4425 | { |
54dfdeb0 | 4426 | Lisp_Object sym; |
0fa3ba92 | 4427 | char *type_name; |
177c0ea7 | 4428 | |
7313acd0 | 4429 | switch (XINT (PER_BUFFER_TYPE (offset))) |
0fa3ba92 | 4430 | { |
7c02e886 GM |
4431 | case Lisp_Int: |
4432 | type_name = "integers"; | |
4433 | break; | |
177c0ea7 | 4434 | |
7c02e886 GM |
4435 | case Lisp_String: |
4436 | type_name = "strings"; | |
4437 | break; | |
177c0ea7 | 4438 | |
7c02e886 GM |
4439 | case Lisp_Symbol: |
4440 | type_name = "symbols"; | |
4441 | break; | |
177c0ea7 | 4442 | |
0fa3ba92 JB |
4443 | default: |
4444 | abort (); | |
4445 | } | |
4446 | ||
7313acd0 | 4447 | sym = PER_BUFFER_SYMBOL (offset); |
1bf08baf | 4448 | error ("Only %s should be stored in the buffer-local variable %s", |
d5db4077 | 4449 | type_name, SDATA (SYMBOL_NAME (sym))); |
0fa3ba92 | 4450 | } |
7c02e886 | 4451 | |
0fa3ba92 | 4452 | \f |
b86af064 GM |
4453 | /*********************************************************************** |
4454 | Allocation with mmap | |
4455 | ***********************************************************************/ | |
4456 | ||
4457 | #ifdef USE_MMAP_FOR_BUFFERS | |
4458 | ||
4459 | #include <sys/types.h> | |
4460 | #include <sys/mman.h> | |
4461 | ||
4462 | #ifndef MAP_ANON | |
4463 | #ifdef MAP_ANONYMOUS | |
4464 | #define MAP_ANON MAP_ANONYMOUS | |
4465 | #else | |
4466 | #define MAP_ANON 0 | |
4467 | #endif | |
4468 | #endif | |
4469 | ||
09dfdf85 GM |
4470 | #ifndef MAP_FAILED |
4471 | #define MAP_FAILED ((void *) -1) | |
4472 | #endif | |
4473 | ||
b86af064 GM |
4474 | #include <stdio.h> |
4475 | #include <errno.h> | |
4476 | ||
4477 | #if MAP_ANON == 0 | |
4478 | #include <fcntl.h> | |
4479 | #endif | |
4480 | ||
4481 | #include "coding.h" | |
4482 | ||
4483 | ||
4484 | /* Memory is allocated in regions which are mapped using mmap(2). | |
4485 | The current implementation lets the system select mapped | |
4486 | addresses; we're not using MAP_FIXED in general, except when | |
4487 | trying to enlarge regions. | |
4488 | ||
4489 | Each mapped region starts with a mmap_region structure, the user | |
4490 | area starts after that structure, aligned to MEM_ALIGN. | |
4491 | ||
4492 | +-----------------------+ | |
4493 | | struct mmap_info + | | |
4494 | | padding | | |
4495 | +-----------------------+ | |
4496 | | user data | | |
4497 | | | | |
4498 | | | | |
4499 | +-----------------------+ */ | |
4500 | ||
4501 | struct mmap_region | |
4502 | { | |
4503 | /* User-specified size. */ | |
4504 | size_t nbytes_specified; | |
177c0ea7 | 4505 | |
b86af064 GM |
4506 | /* Number of bytes mapped */ |
4507 | size_t nbytes_mapped; | |
4508 | ||
4509 | /* Pointer to the location holding the address of the memory | |
4510 | allocated with the mmap'd block. The variable actually points | |
4511 | after this structure. */ | |
4512 | POINTER_TYPE **var; | |
4513 | ||
4514 | /* Next and previous in list of all mmap'd regions. */ | |
4515 | struct mmap_region *next, *prev; | |
4516 | }; | |
4517 | ||
4518 | /* Doubly-linked list of mmap'd regions. */ | |
4519 | ||
4520 | static struct mmap_region *mmap_regions; | |
4521 | ||
4522 | /* File descriptor for mmap. If we don't have anonymous mapping, | |
4523 | /dev/zero will be opened on it. */ | |
4524 | ||
4525 | static int mmap_fd; | |
4526 | ||
4527 | /* Temporary storage for mmap_set_vars, see there. */ | |
4528 | ||
4529 | static struct mmap_region *mmap_regions_1; | |
4530 | static int mmap_fd_1; | |
4531 | ||
4532 | /* Page size on this system. */ | |
4533 | ||
4534 | static int mmap_page_size; | |
4535 | ||
4536 | /* 1 means mmap has been intialized. */ | |
4537 | ||
4538 | static int mmap_initialized_p; | |
4539 | ||
4540 | /* Value is X rounded up to the next multiple of N. */ | |
4541 | ||
4542 | #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N)) | |
4543 | ||
4544 | /* Size of mmap_region structure plus padding. */ | |
4545 | ||
4546 | #define MMAP_REGION_STRUCT_SIZE \ | |
4547 | ROUND (sizeof (struct mmap_region), MEM_ALIGN) | |
4548 | ||
4549 | /* Given a pointer P to the start of the user-visible part of a mapped | |
4550 | region, return a pointer to the start of the region. */ | |
4551 | ||
4552 | #define MMAP_REGION(P) \ | |
4553 | ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE)) | |
4554 | ||
4555 | /* Given a pointer P to the start of a mapped region, return a pointer | |
4556 | to the start of the user-visible part of the region. */ | |
4557 | ||
4558 | #define MMAP_USER_AREA(P) \ | |
4559 | ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE)) | |
4560 | ||
4561 | #define MEM_ALIGN sizeof (double) | |
4562 | ||
7273faa1 DL |
4563 | /* Predicate returning true if part of the address range [START .. END] |
4564 | is currently mapped. Used to prevent overwriting an existing | |
08327b22 GM |
4565 | memory mapping. |
4566 | ||
4567 | Default is to conservativly assume the address range is occupied by | |
4568 | something else. This can be overridden by system configuration | |
4569 | files if system-specific means to determine this exists. */ | |
4570 | ||
4571 | #ifndef MMAP_ALLOCATED_P | |
4572 | #define MMAP_ALLOCATED_P(start, end) 1 | |
4573 | #endif | |
4574 | ||
b86af064 GM |
4575 | /* Function prototypes. */ |
4576 | ||
4577 | static int mmap_free_1 P_ ((struct mmap_region *)); | |
4578 | static int mmap_enlarge P_ ((struct mmap_region *, int)); | |
4579 | static struct mmap_region *mmap_find P_ ((POINTER_TYPE *, POINTER_TYPE *)); | |
4580 | static POINTER_TYPE *mmap_alloc P_ ((POINTER_TYPE **, size_t)); | |
4581 | static POINTER_TYPE *mmap_realloc P_ ((POINTER_TYPE **, size_t)); | |
4582 | static void mmap_free P_ ((POINTER_TYPE **ptr)); | |
4583 | static void mmap_init P_ ((void)); | |
4584 | ||
4585 | ||
4586 | /* Return a region overlapping address range START...END, or null if | |
4587 | none. END is not including, i.e. the last byte in the range | |
4588 | is at END - 1. */ | |
4589 | ||
4590 | static struct mmap_region * | |
4591 | mmap_find (start, end) | |
4592 | POINTER_TYPE *start, *end; | |
4593 | { | |
4594 | struct mmap_region *r; | |
4595 | char *s = (char *) start, *e = (char *) end; | |
177c0ea7 | 4596 | |
b86af064 GM |
4597 | for (r = mmap_regions; r; r = r->next) |
4598 | { | |
4599 | char *rstart = (char *) r; | |
4600 | char *rend = rstart + r->nbytes_mapped; | |
4601 | ||
4602 | if (/* First byte of range, i.e. START, in this region? */ | |
4603 | (s >= rstart && s < rend) | |
4604 | /* Last byte of range, i.e. END - 1, in this region? */ | |
4605 | || (e > rstart && e <= rend) | |
4606 | /* First byte of this region in the range? */ | |
4607 | || (rstart >= s && rstart < e) | |
4608 | /* Last byte of this region in the range? */ | |
4609 | || (rend > s && rend <= e)) | |
4610 | break; | |
4611 | } | |
4612 | ||
4613 | return r; | |
4614 | } | |
4615 | ||
4616 | ||
4617 | /* Unmap a region. P is a pointer to the start of the user-araa of | |
4618 | the region. Value is non-zero if successful. */ | |
4619 | ||
4620 | static int | |
4621 | mmap_free_1 (r) | |
4622 | struct mmap_region *r; | |
4623 | { | |
4624 | if (r->next) | |
4625 | r->next->prev = r->prev; | |
4626 | if (r->prev) | |
4627 | r->prev->next = r->next; | |
4628 | else | |
4629 | mmap_regions = r->next; | |
177c0ea7 | 4630 | |
1a15cca0 | 4631 | if (munmap ((POINTER_TYPE *) r, r->nbytes_mapped) == -1) |
b86af064 GM |
4632 | { |
4633 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4634 | return 0; | |
4635 | } | |
4636 | ||
4637 | return 1; | |
4638 | } | |
4639 | ||
4640 | ||
4641 | /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R. | |
4642 | Value is non-zero if successful. */ | |
4643 | ||
4644 | static int | |
4645 | mmap_enlarge (r, npages) | |
4646 | struct mmap_region *r; | |
4647 | int npages; | |
4648 | { | |
4649 | char *region_end = (char *) r + r->nbytes_mapped; | |
4650 | size_t nbytes; | |
4651 | int success = 0; | |
4652 | ||
4653 | if (npages < 0) | |
4654 | { | |
4655 | /* Unmap pages at the end of the region. */ | |
4656 | nbytes = - npages * mmap_page_size; | |
4657 | if (munmap (region_end - nbytes, nbytes) == -1) | |
4658 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4659 | else | |
4660 | { | |
4661 | r->nbytes_mapped -= nbytes; | |
4662 | success = 1; | |
4663 | } | |
4664 | } | |
4665 | else if (npages > 0) | |
4666 | { | |
b86af064 | 4667 | nbytes = npages * mmap_page_size; |
177c0ea7 | 4668 | |
b86af064 GM |
4669 | /* Try to map additional pages at the end of the region. We |
4670 | cannot do this if the address range is already occupied by | |
4671 | something else because mmap deletes any previous mapping. | |
4672 | I'm not sure this is worth doing, let's see. */ | |
08327b22 | 4673 | if (!MMAP_ALLOCATED_P (region_end, region_end + nbytes)) |
b86af064 GM |
4674 | { |
4675 | POINTER_TYPE *p; | |
177c0ea7 | 4676 | |
b86af064 GM |
4677 | p = mmap (region_end, nbytes, PROT_READ | PROT_WRITE, |
4678 | MAP_ANON | MAP_PRIVATE | MAP_FIXED, mmap_fd, 0); | |
4679 | if (p == MAP_FAILED) | |
edaa9aed | 4680 | ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */ |
b86af064 GM |
4681 | else if (p != (POINTER_TYPE *) region_end) |
4682 | { | |
4683 | /* Kernels are free to choose a different address. In | |
4684 | that case, unmap what we've mapped above; we have | |
4685 | no use for it. */ | |
4686 | if (munmap (p, nbytes) == -1) | |
4687 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4688 | } | |
4689 | else | |
4690 | { | |
4691 | r->nbytes_mapped += nbytes; | |
4692 | success = 1; | |
4693 | } | |
4694 | } | |
4695 | } | |
4696 | ||
4697 | return success; | |
4698 | } | |
4699 | ||
4700 | ||
4701 | /* Set or reset variables holding references to mapped regions. If | |
4702 | RESTORE_P is zero, set all variables to null. If RESTORE_P is | |
4703 | non-zero, set all variables to the start of the user-areas | |
4704 | of mapped regions. | |
4705 | ||
4706 | This function is called from Fdump_emacs to ensure that the dumped | |
4707 | Emacs doesn't contain references to memory that won't be mapped | |
4708 | when Emacs starts. */ | |
4709 | ||
4710 | void | |
4711 | mmap_set_vars (restore_p) | |
4712 | int restore_p; | |
4713 | { | |
4714 | struct mmap_region *r; | |
4715 | ||
4716 | if (restore_p) | |
4717 | { | |
4718 | mmap_regions = mmap_regions_1; | |
4719 | mmap_fd = mmap_fd_1; | |
4720 | for (r = mmap_regions; r; r = r->next) | |
4721 | *r->var = MMAP_USER_AREA (r); | |
4722 | } | |
4723 | else | |
4724 | { | |
4725 | for (r = mmap_regions; r; r = r->next) | |
4726 | *r->var = NULL; | |
4727 | mmap_regions_1 = mmap_regions; | |
4728 | mmap_regions = NULL; | |
4729 | mmap_fd_1 = mmap_fd; | |
4730 | mmap_fd = -1; | |
4731 | } | |
4732 | } | |
4733 | ||
4734 | ||
4735 | /* Allocate a block of storage large enough to hold NBYTES bytes of | |
4736 | data. A pointer to the data is returned in *VAR. VAR is thus the | |
4737 | address of some variable which will use the data area. | |
4738 | ||
4739 | The allocation of 0 bytes is valid. | |
4740 | ||
4741 | If we can't allocate the necessary memory, set *VAR to null, and | |
4742 | return null. */ | |
4743 | ||
4744 | static POINTER_TYPE * | |
4745 | mmap_alloc (var, nbytes) | |
4746 | POINTER_TYPE **var; | |
4747 | size_t nbytes; | |
4748 | { | |
4749 | void *p; | |
4750 | size_t map; | |
4751 | ||
4752 | mmap_init (); | |
4753 | ||
4754 | map = ROUND (nbytes + MMAP_REGION_STRUCT_SIZE, mmap_page_size); | |
4755 | p = mmap (NULL, map, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, | |
4756 | mmap_fd, 0); | |
177c0ea7 | 4757 | |
b86af064 GM |
4758 | if (p == MAP_FAILED) |
4759 | { | |
4760 | if (errno != ENOMEM) | |
4761 | fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); | |
4762 | p = NULL; | |
4763 | } | |
4764 | else | |
4765 | { | |
4766 | struct mmap_region *r = (struct mmap_region *) p; | |
177c0ea7 | 4767 | |
b86af064 GM |
4768 | r->nbytes_specified = nbytes; |
4769 | r->nbytes_mapped = map; | |
4770 | r->var = var; | |
4771 | r->prev = NULL; | |
4772 | r->next = mmap_regions; | |
4773 | if (r->next) | |
4774 | r->next->prev = r; | |
4775 | mmap_regions = r; | |
177c0ea7 | 4776 | |
b86af064 GM |
4777 | p = MMAP_USER_AREA (p); |
4778 | } | |
177c0ea7 | 4779 | |
b86af064 GM |
4780 | return *var = p; |
4781 | } | |
4782 | ||
4783 | ||
4784 | /* Given a pointer at address VAR to data allocated with mmap_alloc, | |
4785 | resize it to size NBYTES. Change *VAR to reflect the new block, | |
4786 | and return this value. If more memory cannot be allocated, then | |
4787 | leave *VAR unchanged, and return null. */ | |
4788 | ||
4789 | static POINTER_TYPE * | |
4790 | mmap_realloc (var, nbytes) | |
4791 | POINTER_TYPE **var; | |
4792 | size_t nbytes; | |
4793 | { | |
4794 | POINTER_TYPE *result; | |
177c0ea7 | 4795 | |
b86af064 GM |
4796 | mmap_init (); |
4797 | ||
4798 | if (*var == NULL) | |
4799 | result = mmap_alloc (var, nbytes); | |
177c0ea7 | 4800 | else if (nbytes == 0) |
b86af064 GM |
4801 | { |
4802 | mmap_free (var); | |
4803 | result = mmap_alloc (var, nbytes); | |
4804 | } | |
4805 | else | |
4806 | { | |
4807 | struct mmap_region *r = MMAP_REGION (*var); | |
4808 | size_t room = r->nbytes_mapped - MMAP_REGION_STRUCT_SIZE; | |
177c0ea7 | 4809 | |
b86af064 GM |
4810 | if (room < nbytes) |
4811 | { | |
4812 | /* Must enlarge. */ | |
4813 | POINTER_TYPE *old_ptr = *var; | |
4814 | ||
4815 | /* Try to map additional pages at the end of the region. | |
4816 | If that fails, allocate a new region, copy data | |
4817 | from the old region, then free it. */ | |
4818 | if (mmap_enlarge (r, (ROUND (nbytes - room, mmap_page_size) | |
4819 | / mmap_page_size))) | |
4820 | { | |
4821 | r->nbytes_specified = nbytes; | |
4822 | *var = result = old_ptr; | |
4823 | } | |
4824 | else if (mmap_alloc (var, nbytes)) | |
4825 | { | |
4826 | bcopy (old_ptr, *var, r->nbytes_specified); | |
4827 | mmap_free_1 (MMAP_REGION (old_ptr)); | |
4828 | result = *var; | |
4829 | r = MMAP_REGION (result); | |
4830 | r->nbytes_specified = nbytes; | |
4831 | } | |
4832 | else | |
4833 | { | |
4834 | *var = old_ptr; | |
4835 | result = NULL; | |
4836 | } | |
4837 | } | |
4838 | else if (room - nbytes >= mmap_page_size) | |
4839 | { | |
4840 | /* Shrinking by at least a page. Let's give some | |
6bcdeb8c KR |
4841 | memory back to the system. |
4842 | ||
4843 | The extra parens are to make the division happens first, | |
4844 | on positive values, so we know it will round towards | |
4845 | zero. */ | |
bb63c5c9 | 4846 | mmap_enlarge (r, - ((room - nbytes) / mmap_page_size)); |
b86af064 GM |
4847 | result = *var; |
4848 | r->nbytes_specified = nbytes; | |
4849 | } | |
4850 | else | |
4851 | { | |
4852 | /* Leave it alone. */ | |
4853 | result = *var; | |
4854 | r->nbytes_specified = nbytes; | |
4855 | } | |
4856 | } | |
4857 | ||
4858 | return result; | |
4859 | } | |
4860 | ||
4861 | ||
4862 | /* Free a block of relocatable storage whose data is pointed to by | |
4863 | PTR. Store 0 in *PTR to show there's no block allocated. */ | |
4864 | ||
4865 | static void | |
4866 | mmap_free (var) | |
4867 | POINTER_TYPE **var; | |
4868 | { | |
4869 | mmap_init (); | |
177c0ea7 | 4870 | |
b86af064 GM |
4871 | if (*var) |
4872 | { | |
4873 | mmap_free_1 (MMAP_REGION (*var)); | |
4874 | *var = NULL; | |
4875 | } | |
4876 | } | |
4877 | ||
4878 | ||
4879 | /* Perform necessary intializations for the use of mmap. */ | |
4880 | ||
4881 | static void | |
4882 | mmap_init () | |
4883 | { | |
4884 | #if MAP_ANON == 0 | |
4885 | /* The value of mmap_fd is initially 0 in temacs, and -1 | |
4886 | in a dumped Emacs. */ | |
4887 | if (mmap_fd <= 0) | |
4888 | { | |
4889 | /* No anonymous mmap -- we need the file descriptor. */ | |
4890 | mmap_fd = open ("/dev/zero", O_RDONLY); | |
4891 | if (mmap_fd == -1) | |
4892 | fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno)); | |
4893 | } | |
4894 | #endif /* MAP_ANON == 0 */ | |
4895 | ||
4896 | if (mmap_initialized_p) | |
4897 | return; | |
4898 | mmap_initialized_p = 1; | |
177c0ea7 | 4899 | |
b86af064 GM |
4900 | #if MAP_ANON != 0 |
4901 | mmap_fd = -1; | |
4902 | #endif | |
177c0ea7 | 4903 | |
b86af064 GM |
4904 | mmap_page_size = getpagesize (); |
4905 | } | |
4906 | ||
4907 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
4908 | ||
4909 | ||
4910 | \f | |
4911 | /*********************************************************************** | |
4912 | Buffer-text Allocation | |
4913 | ***********************************************************************/ | |
4914 | ||
4915 | #ifdef REL_ALLOC | |
4916 | extern POINTER_TYPE *r_alloc P_ ((POINTER_TYPE **, size_t)); | |
4917 | extern POINTER_TYPE *r_re_alloc P_ ((POINTER_TYPE **, size_t)); | |
4918 | extern void r_alloc_free P_ ((POINTER_TYPE **ptr)); | |
4919 | #endif /* REL_ALLOC */ | |
4920 | ||
4921 | ||
4922 | /* Allocate NBYTES bytes for buffer B's text buffer. */ | |
4923 | ||
4924 | static void | |
4925 | alloc_buffer_text (b, nbytes) | |
4926 | struct buffer *b; | |
4927 | size_t nbytes; | |
4928 | { | |
4929 | POINTER_TYPE *p; | |
177c0ea7 | 4930 | |
b86af064 GM |
4931 | BLOCK_INPUT; |
4932 | #if defined USE_MMAP_FOR_BUFFERS | |
4933 | p = mmap_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4934 | #elif defined REL_ALLOC | |
4935 | p = r_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4936 | #else | |
815add84 | 4937 | p = xmalloc (nbytes); |
b86af064 | 4938 | #endif |
177c0ea7 | 4939 | |
b86af064 GM |
4940 | if (p == NULL) |
4941 | { | |
4942 | UNBLOCK_INPUT; | |
4943 | memory_full (); | |
4944 | } | |
4945 | ||
4946 | b->text->beg = (unsigned char *) p; | |
4947 | UNBLOCK_INPUT; | |
4948 | } | |
4949 | ||
4950 | /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means | |
4951 | shrink it. */ | |
4952 | ||
4953 | void | |
4954 | enlarge_buffer_text (b, delta) | |
4955 | struct buffer *b; | |
4956 | int delta; | |
4957 | { | |
4958 | POINTER_TYPE *p; | |
4959 | size_t nbytes = (BUF_Z_BYTE (b) - BUF_BEG_BYTE (b) + BUF_GAP_SIZE (b) + 1 | |
4960 | + delta); | |
4961 | BLOCK_INPUT; | |
4962 | #if defined USE_MMAP_FOR_BUFFERS | |
4963 | p = mmap_realloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4964 | #elif defined REL_ALLOC | |
4965 | p = r_re_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4966 | #else | |
4967 | p = xrealloc (b->text->beg, nbytes); | |
4968 | #endif | |
177c0ea7 | 4969 | |
b86af064 GM |
4970 | if (p == NULL) |
4971 | { | |
4972 | UNBLOCK_INPUT; | |
4973 | memory_full (); | |
4974 | } | |
4975 | ||
4976 | BUF_BEG_ADDR (b) = (unsigned char *) p; | |
4977 | UNBLOCK_INPUT; | |
4978 | } | |
4979 | ||
4980 | ||
4981 | /* Free buffer B's text buffer. */ | |
4982 | ||
4983 | static void | |
4984 | free_buffer_text (b) | |
4985 | struct buffer *b; | |
4986 | { | |
4987 | BLOCK_INPUT; | |
4988 | ||
4989 | #if defined USE_MMAP_FOR_BUFFERS | |
4990 | mmap_free ((POINTER_TYPE **) &b->text->beg); | |
4991 | #elif defined REL_ALLOC | |
4992 | r_alloc_free ((POINTER_TYPE **) &b->text->beg); | |
4993 | #else | |
4994 | xfree (b->text->beg); | |
4995 | #endif | |
177c0ea7 | 4996 | |
b86af064 GM |
4997 | BUF_BEG_ADDR (b) = NULL; |
4998 | UNBLOCK_INPUT; | |
4999 | } | |
5000 | ||
5001 | ||
5002 | \f | |
5003 | /*********************************************************************** | |
5004 | Initialization | |
5005 | ***********************************************************************/ | |
5006 | ||
dfcf069d | 5007 | void |
1ab256cb RM |
5008 | init_buffer_once () |
5009 | { | |
7c02e886 GM |
5010 | int idx; |
5011 | ||
5012 | bzero (buffer_permanent_local_flags, sizeof buffer_permanent_local_flags); | |
13de9290 | 5013 | |
1ab256cb RM |
5014 | /* Make sure all markable slots in buffer_defaults |
5015 | are initialized reasonably, so mark_buffer won't choke. */ | |
5016 | reset_buffer (&buffer_defaults); | |
13de9290 | 5017 | reset_buffer_local_variables (&buffer_defaults, 1); |
1ab256cb | 5018 | reset_buffer (&buffer_local_symbols); |
13de9290 | 5019 | reset_buffer_local_variables (&buffer_local_symbols, 1); |
336cd056 RS |
5020 | /* Prevent GC from getting confused. */ |
5021 | buffer_defaults.text = &buffer_defaults.own_text; | |
5022 | buffer_local_symbols.text = &buffer_local_symbols.own_text; | |
336cd056 RS |
5023 | BUF_INTERVALS (&buffer_defaults) = 0; |
5024 | BUF_INTERVALS (&buffer_local_symbols) = 0; | |
67180c6a KH |
5025 | XSETBUFFER (Vbuffer_defaults, &buffer_defaults); |
5026 | XSETBUFFER (Vbuffer_local_symbols, &buffer_local_symbols); | |
1ab256cb RM |
5027 | |
5028 | /* Set up the default values of various buffer slots. */ | |
5029 | /* Must do these before making the first buffer! */ | |
5030 | ||
f532dca0 | 5031 | /* real setup is done in bindings.el */ |
1ab256cb | 5032 | buffer_defaults.mode_line_format = build_string ("%-"); |
045dee35 | 5033 | buffer_defaults.header_line_format = Qnil; |
1ab256cb RM |
5034 | buffer_defaults.abbrev_mode = Qnil; |
5035 | buffer_defaults.overwrite_mode = Qnil; | |
5036 | buffer_defaults.case_fold_search = Qt; | |
5037 | buffer_defaults.auto_fill_function = Qnil; | |
5038 | buffer_defaults.selective_display = Qnil; | |
5039 | #ifndef old | |
5040 | buffer_defaults.selective_display_ellipses = Qt; | |
5041 | #endif | |
5042 | buffer_defaults.abbrev_table = Qnil; | |
5043 | buffer_defaults.display_table = Qnil; | |
1ab256cb | 5044 | buffer_defaults.undo_list = Qnil; |
c48f61ef | 5045 | buffer_defaults.mark_active = Qnil; |
be9aafdd | 5046 | buffer_defaults.file_format = Qnil; |
71ed49fa | 5047 | buffer_defaults.auto_save_file_format = Qt; |
2410d73a SM |
5048 | buffer_defaults.overlays_before = NULL; |
5049 | buffer_defaults.overlays_after = NULL; | |
c2d5b10f | 5050 | buffer_defaults.overlay_center = BEG; |
1ab256cb | 5051 | |
8d7a4592 | 5052 | XSETFASTINT (buffer_defaults.tab_width, 8); |
1ab256cb RM |
5053 | buffer_defaults.truncate_lines = Qnil; |
5054 | buffer_defaults.ctl_arrow = Qt; | |
3b06f880 | 5055 | buffer_defaults.direction_reversed = Qnil; |
bb2ec976 | 5056 | buffer_defaults.cursor_type = Qt; |
a3bbced0 | 5057 | buffer_defaults.extra_line_spacing = Qnil; |
187ccf49 | 5058 | buffer_defaults.cursor_in_non_selected_windows = Qt; |
1ab256cb | 5059 | |
f7975d07 | 5060 | #ifdef DOS_NT |
0776cb1b | 5061 | buffer_defaults.buffer_file_type = Qnil; /* TEXT */ |
54ad07d3 | 5062 | #endif |
a1a17b61 | 5063 | buffer_defaults.enable_multibyte_characters = Qt; |
c71b5d9b | 5064 | buffer_defaults.buffer_file_coding_system = Qnil; |
8d7a4592 KH |
5065 | XSETFASTINT (buffer_defaults.fill_column, 70); |
5066 | XSETFASTINT (buffer_defaults.left_margin, 0); | |
28e969dd | 5067 | buffer_defaults.cache_long_line_scans = Qnil; |
f6ed2e84 | 5068 | buffer_defaults.file_truename = Qnil; |
7962a441 | 5069 | XSETFASTINT (buffer_defaults.display_count, 0); |
2ad8731a KS |
5070 | XSETFASTINT (buffer_defaults.left_margin_cols, 0); |
5071 | XSETFASTINT (buffer_defaults.right_margin_cols, 0); | |
5072 | buffer_defaults.left_fringe_width = Qnil; | |
5073 | buffer_defaults.right_fringe_width = Qnil; | |
5074 | buffer_defaults.fringes_outside_margins = Qnil; | |
5075 | buffer_defaults.scroll_bar_width = Qnil; | |
5076 | buffer_defaults.vertical_scroll_bar_type = Qt; | |
0552666b | 5077 | buffer_defaults.indicate_empty_lines = Qnil; |
6b61353c | 5078 | buffer_defaults.indicate_buffer_boundaries = Qnil; |
c6a46372 KS |
5079 | buffer_defaults.fringe_indicator_alist = Qnil; |
5080 | buffer_defaults.fringe_cursor_alist = Qnil; | |
0552666b GM |
5081 | buffer_defaults.scroll_up_aggressively = Qnil; |
5082 | buffer_defaults.scroll_down_aggressively = Qnil; | |
3fd364db | 5083 | buffer_defaults.display_time = Qnil; |
1ab256cb RM |
5084 | |
5085 | /* Assign the local-flags to the slots that have default values. | |
5086 | The local flag is a bit that is used in the buffer | |
5087 | to say that it has its own local value for the slot. | |
5088 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
5089 | ||
5090 | /* Nothing can work if this isn't true */ | |
4d2f1389 | 5091 | if (sizeof (EMACS_INT) != sizeof (Lisp_Object)) abort (); |
1ab256cb RM |
5092 | |
5093 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
5094 | bzero (&buffer_local_flags, sizeof buffer_local_flags); | |
aab80822 KH |
5095 | XSETINT (buffer_local_flags.filename, -1); |
5096 | XSETINT (buffer_local_flags.directory, -1); | |
5097 | XSETINT (buffer_local_flags.backed_up, -1); | |
5098 | XSETINT (buffer_local_flags.save_length, -1); | |
5099 | XSETINT (buffer_local_flags.auto_save_file_name, -1); | |
5100 | XSETINT (buffer_local_flags.read_only, -1); | |
5101 | XSETINT (buffer_local_flags.major_mode, -1); | |
5102 | XSETINT (buffer_local_flags.mode_name, -1); | |
5103 | XSETINT (buffer_local_flags.undo_list, -1); | |
5104 | XSETINT (buffer_local_flags.mark_active, -1); | |
943e065b | 5105 | XSETINT (buffer_local_flags.point_before_scroll, -1); |
f6ed2e84 | 5106 | XSETINT (buffer_local_flags.file_truename, -1); |
3cb719bd | 5107 | XSETINT (buffer_local_flags.invisibility_spec, -1); |
55ac8536 | 5108 | XSETINT (buffer_local_flags.file_format, -1); |
71ed49fa | 5109 | XSETINT (buffer_local_flags.auto_save_file_format, -1); |
7962a441 | 5110 | XSETINT (buffer_local_flags.display_count, -1); |
3fd364db | 5111 | XSETINT (buffer_local_flags.display_time, -1); |
1bf08baf | 5112 | XSETINT (buffer_local_flags.enable_multibyte_characters, -1); |
8d7a4592 | 5113 | |
7c02e886 GM |
5114 | idx = 1; |
5115 | XSETFASTINT (buffer_local_flags.mode_line_format, idx); ++idx; | |
5116 | XSETFASTINT (buffer_local_flags.abbrev_mode, idx); ++idx; | |
5117 | XSETFASTINT (buffer_local_flags.overwrite_mode, idx); ++idx; | |
5118 | XSETFASTINT (buffer_local_flags.case_fold_search, idx); ++idx; | |
5119 | XSETFASTINT (buffer_local_flags.auto_fill_function, idx); ++idx; | |
5120 | XSETFASTINT (buffer_local_flags.selective_display, idx); ++idx; | |
1ab256cb | 5121 | #ifndef old |
7c02e886 | 5122 | XSETFASTINT (buffer_local_flags.selective_display_ellipses, idx); ++idx; |
1ab256cb | 5123 | #endif |
7c02e886 GM |
5124 | XSETFASTINT (buffer_local_flags.tab_width, idx); ++idx; |
5125 | XSETFASTINT (buffer_local_flags.truncate_lines, idx); ++idx; | |
5126 | XSETFASTINT (buffer_local_flags.ctl_arrow, idx); ++idx; | |
5127 | XSETFASTINT (buffer_local_flags.fill_column, idx); ++idx; | |
5128 | XSETFASTINT (buffer_local_flags.left_margin, idx); ++idx; | |
5129 | XSETFASTINT (buffer_local_flags.abbrev_table, idx); ++idx; | |
5130 | XSETFASTINT (buffer_local_flags.display_table, idx); ++idx; | |
f7975d07 | 5131 | #ifdef DOS_NT |
7c02e886 | 5132 | XSETFASTINT (buffer_local_flags.buffer_file_type, idx); |
13de9290 | 5133 | /* Make this one a permanent local. */ |
7c02e886 | 5134 | buffer_permanent_local_flags[idx++] = 1; |
54ad07d3 | 5135 | #endif |
7c02e886 GM |
5136 | XSETFASTINT (buffer_local_flags.syntax_table, idx); ++idx; |
5137 | XSETFASTINT (buffer_local_flags.cache_long_line_scans, idx); ++idx; | |
5138 | XSETFASTINT (buffer_local_flags.category_table, idx); ++idx; | |
5139 | XSETFASTINT (buffer_local_flags.direction_reversed, idx); ++idx; | |
177c0ea7 | 5140 | XSETFASTINT (buffer_local_flags.buffer_file_coding_system, idx); |
a1a17b61 | 5141 | /* Make this one a permanent local. */ |
7c02e886 | 5142 | buffer_permanent_local_flags[idx++] = 1; |
2ad8731a KS |
5143 | XSETFASTINT (buffer_local_flags.left_margin_cols, idx); ++idx; |
5144 | XSETFASTINT (buffer_local_flags.right_margin_cols, idx); ++idx; | |
5145 | XSETFASTINT (buffer_local_flags.left_fringe_width, idx); ++idx; | |
5146 | XSETFASTINT (buffer_local_flags.right_fringe_width, idx); ++idx; | |
5147 | XSETFASTINT (buffer_local_flags.fringes_outside_margins, idx); ++idx; | |
5148 | XSETFASTINT (buffer_local_flags.scroll_bar_width, idx); ++idx; | |
5149 | XSETFASTINT (buffer_local_flags.vertical_scroll_bar_type, idx); ++idx; | |
7c02e886 | 5150 | XSETFASTINT (buffer_local_flags.indicate_empty_lines, idx); ++idx; |
6b61353c | 5151 | XSETFASTINT (buffer_local_flags.indicate_buffer_boundaries, idx); ++idx; |
c6a46372 KS |
5152 | XSETFASTINT (buffer_local_flags.fringe_indicator_alist, idx); ++idx; |
5153 | XSETFASTINT (buffer_local_flags.fringe_cursor_alist, idx); ++idx; | |
7c02e886 GM |
5154 | XSETFASTINT (buffer_local_flags.scroll_up_aggressively, idx); ++idx; |
5155 | XSETFASTINT (buffer_local_flags.scroll_down_aggressively, idx); ++idx; | |
5156 | XSETFASTINT (buffer_local_flags.header_line_format, idx); ++idx; | |
bd96bd79 | 5157 | XSETFASTINT (buffer_local_flags.cursor_type, idx); ++idx; |
a3bbced0 | 5158 | XSETFASTINT (buffer_local_flags.extra_line_spacing, idx); ++idx; |
0124c5bd | 5159 | XSETFASTINT (buffer_local_flags.cursor_in_non_selected_windows, idx); ++idx; |
7c02e886 GM |
5160 | |
5161 | /* Need more room? */ | |
7313acd0 | 5162 | if (idx >= MAX_PER_BUFFER_VARS) |
7c02e886 | 5163 | abort (); |
7313acd0 | 5164 | last_per_buffer_idx = idx; |
177c0ea7 | 5165 | |
1ab256cb RM |
5166 | Vbuffer_alist = Qnil; |
5167 | current_buffer = 0; | |
5168 | all_buffers = 0; | |
5169 | ||
5170 | QSFundamental = build_string ("Fundamental"); | |
5171 | ||
5172 | Qfundamental_mode = intern ("fundamental-mode"); | |
5173 | buffer_defaults.major_mode = Qfundamental_mode; | |
5174 | ||
5175 | Qmode_class = intern ("mode-class"); | |
5176 | ||
5177 | Qprotected_field = intern ("protected-field"); | |
5178 | ||
5179 | Qpermanent_local = intern ("permanent-local"); | |
5180 | ||
5181 | Qkill_buffer_hook = intern ("kill-buffer-hook"); | |
fd6cfe11 | 5182 | Fput (Qkill_buffer_hook, Qpermanent_local, Qt); |
1ab256cb | 5183 | |
48265e61 DL |
5184 | Qucs_set_table_for_input = intern ("ucs-set-table-for-input"); |
5185 | ||
1ab256cb | 5186 | Vprin1_to_string_buffer = Fget_buffer_create (build_string (" prin1")); |
000f8083 | 5187 | |
1ab256cb RM |
5188 | /* super-magic invisible buffer */ |
5189 | Vbuffer_alist = Qnil; | |
5190 | ||
ffd56f97 | 5191 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
7775635d KH |
5192 | |
5193 | inhibit_modification_hooks = 0; | |
1ab256cb RM |
5194 | } |
5195 | ||
dfcf069d | 5196 | void |
1ab256cb RM |
5197 | init_buffer () |
5198 | { | |
2381d133 | 5199 | char *pwd; |
136351b7 | 5200 | Lisp_Object temp; |
b639c9be | 5201 | int len; |
1ab256cb | 5202 | |
b86af064 | 5203 | #ifdef USE_MMAP_FOR_BUFFERS |
93c27ef1 GM |
5204 | { |
5205 | /* When using the ralloc implementation based on mmap(2), buffer | |
5206 | text pointers will have been set to null in the dumped Emacs. | |
5207 | Map new memory. */ | |
5208 | struct buffer *b; | |
177c0ea7 | 5209 | |
93c27ef1 GM |
5210 | for (b = all_buffers; b; b = b->next) |
5211 | if (b->text->beg == NULL) | |
b86af064 | 5212 | enlarge_buffer_text (b, 0); |
93c27ef1 | 5213 | } |
b86af064 | 5214 | #endif /* USE_MMAP_FOR_BUFFERS */ |
177c0ea7 | 5215 | |
1ab256cb | 5216 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
3d871c85 RS |
5217 | if (NILP (buffer_defaults.enable_multibyte_characters)) |
5218 | Fset_buffer_multibyte (Qnil); | |
2381d133 | 5219 | |
01537133 | 5220 | pwd = get_current_dir_name (); |
a17b5ed1 | 5221 | |
156bdb41 | 5222 | if (!pwd) |
a17b5ed1 | 5223 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); |
1ab256cb RM |
5224 | |
5225 | #ifndef VMS | |
5226 | /* Maybe this should really use some standard subroutine | |
5227 | whose definition is filename syntax dependent. */ | |
b639c9be RF |
5228 | len = strlen (pwd); |
5229 | if (!(IS_DIRECTORY_SEP (pwd[len - 1]))) | |
f7975d07 | 5230 | { |
156bdb41 | 5231 | /* Grow buffer to add directory separator and '\0'. */ |
b639c9be RF |
5232 | pwd = (char *) xrealloc (pwd, len + 2); |
5233 | pwd[len] = DIRECTORY_SEP; | |
5234 | pwd[len + 1] = '\0'; | |
f7975d07 | 5235 | } |
1ab256cb | 5236 | #endif /* not VMS */ |
0995fa35 | 5237 | |
01537133 | 5238 | current_buffer->directory = make_unibyte_string (pwd, strlen (pwd)); |
dcd74c5f | 5239 | if (! NILP (buffer_defaults.enable_multibyte_characters)) |
f9962371 | 5240 | /* At this moment, we still don't know how to decode the |
156bdb41 | 5241 | directory name. So, we keep the bytes in multibyte form so |
dcd74c5f KH |
5242 | that ENCODE_FILE correctly gets the original bytes. */ |
5243 | current_buffer->directory | |
5244 | = string_to_multibyte (current_buffer->directory); | |
136351b7 | 5245 | |
0995fa35 RS |
5246 | /* Add /: to the front of the name |
5247 | if it would otherwise be treated as magic. */ | |
5248 | temp = Ffind_file_name_handler (current_buffer->directory, Qt); | |
81ab2e07 KH |
5249 | if (! NILP (temp) |
5250 | /* If the default dir is just /, TEMP is non-nil | |
5251 | because of the ange-ftp completion handler. | |
5252 | However, it is not necessary to turn / into /:/. | |
5253 | So avoid doing that. */ | |
d5db4077 | 5254 | && strcmp ("/", SDATA (current_buffer->directory))) |
0995fa35 RS |
5255 | current_buffer->directory |
5256 | = concat2 (build_string ("/:"), current_buffer->directory); | |
5257 | ||
136351b7 RS |
5258 | temp = get_minibuffer (0); |
5259 | XBUFFER (temp)->directory = current_buffer->directory; | |
01537133 EZ |
5260 | |
5261 | free (pwd); | |
1ab256cb RM |
5262 | } |
5263 | ||
5264 | /* initialize the buffer routines */ | |
dfcf069d | 5265 | void |
1ab256cb RM |
5266 | syms_of_buffer () |
5267 | { | |
9115729e KH |
5268 | staticpro (&last_overlay_modification_hooks); |
5269 | last_overlay_modification_hooks | |
5270 | = Fmake_vector (make_number (10), Qnil); | |
5271 | ||
1ab256cb RM |
5272 | staticpro (&Vbuffer_defaults); |
5273 | staticpro (&Vbuffer_local_symbols); | |
5274 | staticpro (&Qfundamental_mode); | |
5275 | staticpro (&Qmode_class); | |
5276 | staticpro (&QSFundamental); | |
5277 | staticpro (&Vbuffer_alist); | |
5278 | staticpro (&Qprotected_field); | |
5279 | staticpro (&Qpermanent_local); | |
5280 | staticpro (&Qkill_buffer_hook); | |
22378665 | 5281 | Qoverlayp = intern ("overlayp"); |
52f8ec73 | 5282 | staticpro (&Qoverlayp); |
9d7608b7 KH |
5283 | Qevaporate = intern ("evaporate"); |
5284 | staticpro (&Qevaporate); | |
294d215f | 5285 | Qmodification_hooks = intern ("modification-hooks"); |
22378665 | 5286 | staticpro (&Qmodification_hooks); |
294d215f | 5287 | Qinsert_in_front_hooks = intern ("insert-in-front-hooks"); |
22378665 | 5288 | staticpro (&Qinsert_in_front_hooks); |
294d215f | 5289 | Qinsert_behind_hooks = intern ("insert-behind-hooks"); |
22378665 | 5290 | staticpro (&Qinsert_behind_hooks); |
5fe0b67e | 5291 | Qget_file_buffer = intern ("get-file-buffer"); |
22378665 | 5292 | staticpro (&Qget_file_buffer); |
5985d248 KH |
5293 | Qpriority = intern ("priority"); |
5294 | staticpro (&Qpriority); | |
5295 | Qwindow = intern ("window"); | |
5296 | staticpro (&Qwindow); | |
bbbe9545 KH |
5297 | Qbefore_string = intern ("before-string"); |
5298 | staticpro (&Qbefore_string); | |
5299 | Qafter_string = intern ("after-string"); | |
5300 | staticpro (&Qafter_string); | |
22378665 RS |
5301 | Qfirst_change_hook = intern ("first-change-hook"); |
5302 | staticpro (&Qfirst_change_hook); | |
5303 | Qbefore_change_functions = intern ("before-change-functions"); | |
5304 | staticpro (&Qbefore_change_functions); | |
5305 | Qafter_change_functions = intern ("after-change-functions"); | |
5306 | staticpro (&Qafter_change_functions); | |
48265e61 | 5307 | staticpro (&Qucs_set_table_for_input); |
1ab256cb | 5308 | |
5b20caf0 RS |
5309 | Qkill_buffer_query_functions = intern ("kill-buffer-query-functions"); |
5310 | staticpro (&Qkill_buffer_query_functions); | |
5311 | ||
1ab256cb RM |
5312 | Fput (Qprotected_field, Qerror_conditions, |
5313 | Fcons (Qprotected_field, Fcons (Qerror, Qnil))); | |
5314 | Fput (Qprotected_field, Qerror_message, | |
5315 | build_string ("Attempt to modify a protected field")); | |
5316 | ||
5317 | /* All these use DEFVAR_LISP_NOPRO because the slots in | |
5318 | buffer_defaults will all be marked via Vbuffer_defaults. */ | |
5319 | ||
5320 | DEFVAR_LISP_NOPRO ("default-mode-line-format", | |
7ee72033 MB |
5321 | &buffer_defaults.mode_line_format, |
5322 | doc: /* Default value of `mode-line-format' for buffers that don't override it. | |
018ba359 | 5323 | This is the same as (default-value 'mode-line-format). */); |
1ab256cb | 5324 | |
045dee35 | 5325 | DEFVAR_LISP_NOPRO ("default-header-line-format", |
7ee72033 MB |
5326 | &buffer_defaults.header_line_format, |
5327 | doc: /* Default value of `header-line-format' for buffers that don't override it. | |
018ba359 | 5328 | This is the same as (default-value 'header-line-format). */); |
0552666b | 5329 | |
7ee72033 MB |
5330 | DEFVAR_LISP_NOPRO ("default-cursor-type", &buffer_defaults.cursor_type, |
5331 | doc: /* Default value of `cursor-type' for buffers that don't override it. | |
018ba359 | 5332 | This is the same as (default-value 'cursor-type). */); |
bd96bd79 | 5333 | |
a3bbced0 | 5334 | DEFVAR_LISP_NOPRO ("default-line-spacing", |
7ee72033 MB |
5335 | &buffer_defaults.extra_line_spacing, |
5336 | doc: /* Default value of `line-spacing' for buffers that don't override it. | |
018ba359 | 5337 | This is the same as (default-value 'line-spacing). */); |
a3bbced0 | 5338 | |
187ccf49 KS |
5339 | DEFVAR_LISP_NOPRO ("default-cursor-in-non-selected-windows", |
5340 | &buffer_defaults.cursor_in_non_selected_windows, | |
5341 | doc: /* Default value of `cursor-in-non-selected-windows'. | |
5342 | This is the same as (default-value 'cursor-in-non-selected-windows). */); | |
5343 | ||
1ab256cb | 5344 | DEFVAR_LISP_NOPRO ("default-abbrev-mode", |
efc7e75f | 5345 | &buffer_defaults.abbrev_mode, |
7ee72033 | 5346 | doc: /* Default value of `abbrev-mode' for buffers that do not override it. |
018ba359 | 5347 | This is the same as (default-value 'abbrev-mode). */); |
1ab256cb RM |
5348 | |
5349 | DEFVAR_LISP_NOPRO ("default-ctl-arrow", | |
efc7e75f | 5350 | &buffer_defaults.ctl_arrow, |
7ee72033 | 5351 | doc: /* Default value of `ctl-arrow' for buffers that do not override it. |
018ba359 | 5352 | This is the same as (default-value 'ctl-arrow). */); |
1ab256cb | 5353 | |
5e2ad10b JB |
5354 | DEFVAR_LISP_NOPRO ("default-direction-reversed", |
5355 | &buffer_defaults.direction_reversed, | |
5356 | doc: /* Default value of `direction-reversed' for buffers that do not override it. | |
018ba359 | 5357 | This is the same as (default-value 'direction-reversed). */); |
177c0ea7 | 5358 | |
5e2ad10b JB |
5359 | DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters", |
5360 | &buffer_defaults.enable_multibyte_characters, | |
5361 | doc: /* *Default value of `enable-multibyte-characters' for buffers not overriding it. | |
018ba359 | 5362 | This is the same as (default-value 'enable-multibyte-characters). */); |
177c0ea7 | 5363 | |
5e2ad10b JB |
5364 | DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system", |
5365 | &buffer_defaults.buffer_file_coding_system, | |
5366 | doc: /* Default value of `buffer-file-coding-system' for buffers not overriding it. | |
018ba359 | 5367 | This is the same as (default-value 'buffer-file-coding-system). */); |
177c0ea7 | 5368 | |
1ab256cb | 5369 | DEFVAR_LISP_NOPRO ("default-truncate-lines", |
efc7e75f PJ |
5370 | &buffer_defaults.truncate_lines, |
5371 | doc: /* Default value of `truncate-lines' for buffers that do not override it. | |
018ba359 | 5372 | This is the same as (default-value 'truncate-lines). */); |
1ab256cb RM |
5373 | |
5374 | DEFVAR_LISP_NOPRO ("default-fill-column", | |
efc7e75f PJ |
5375 | &buffer_defaults.fill_column, |
5376 | doc: /* Default value of `fill-column' for buffers that do not override it. | |
018ba359 | 5377 | This is the same as (default-value 'fill-column). */); |
1ab256cb RM |
5378 | |
5379 | DEFVAR_LISP_NOPRO ("default-left-margin", | |
efc7e75f PJ |
5380 | &buffer_defaults.left_margin, |
5381 | doc: /* Default value of `left-margin' for buffers that do not override it. | |
018ba359 | 5382 | This is the same as (default-value 'left-margin). */); |
1ab256cb RM |
5383 | |
5384 | DEFVAR_LISP_NOPRO ("default-tab-width", | |
bc0ede35 | 5385 | &buffer_defaults.tab_width, |
23625946 | 5386 | doc: /* Default value of `tab-width' for buffers that do not override it. |
018ba359 | 5387 | This is the same as (default-value 'tab-width). */); |
1ab256cb RM |
5388 | |
5389 | DEFVAR_LISP_NOPRO ("default-case-fold-search", | |
efc7e75f PJ |
5390 | &buffer_defaults.case_fold_search, |
5391 | doc: /* Default value of `case-fold-search' for buffers that don't override it. | |
018ba359 | 5392 | This is the same as (default-value 'case-fold-search). */); |
1ab256cb | 5393 | |
f7975d07 | 5394 | #ifdef DOS_NT |
177c0ea7 | 5395 | DEFVAR_LISP_NOPRO ("default-buffer-file-type", |
7ee72033 | 5396 | &buffer_defaults.buffer_file_type, |
efc7e75f | 5397 | doc: /* Default file type for buffers that do not override it. |
018ba359 PJ |
5398 | This is the same as (default-value 'buffer-file-type). |
5399 | The file type is nil for text, t for binary. */); | |
54ad07d3 RS |
5400 | #endif |
5401 | ||
0552666b | 5402 | DEFVAR_LISP_NOPRO ("default-left-margin-width", |
2ad8731a | 5403 | &buffer_defaults.left_margin_cols, |
efc7e75f | 5404 | doc: /* Default value of `left-margin-width' for buffers that don't override it. |
018ba359 | 5405 | This is the same as (default-value 'left-margin-width). */); |
0552666b GM |
5406 | |
5407 | DEFVAR_LISP_NOPRO ("default-right-margin-width", | |
2ad8731a KS |
5408 | &buffer_defaults.right_margin_cols, |
5409 | doc: /* Default value of `right-margin-width' for buffers that don't override it. | |
018ba359 | 5410 | This is the same as (default-value 'right-margin-width). */); |
177c0ea7 | 5411 | |
2ad8731a KS |
5412 | DEFVAR_LISP_NOPRO ("default-left-fringe-width", |
5413 | &buffer_defaults.left_fringe_width, | |
5414 | doc: /* Default value of `left-fringe-width' for buffers that don't override it. | |
5415 | This is the same as (default-value 'left-fringe-width). */); | |
5416 | ||
5417 | DEFVAR_LISP_NOPRO ("default-right-fringe-width", | |
5418 | &buffer_defaults.right_fringe_width, | |
5419 | doc: /* Default value of `right-fringe-width' for buffers that don't override it. | |
5420 | This is the same as (default-value 'right-fringe-width). */); | |
5421 | ||
5422 | DEFVAR_LISP_NOPRO ("default-fringes-outside-margins", | |
5423 | &buffer_defaults.fringes_outside_margins, | |
5424 | doc: /* Default value of `fringes-outside-margins' for buffers that don't override it. | |
5425 | This is the same as (default-value 'fringes-outside-margins). */); | |
5426 | ||
5427 | DEFVAR_LISP_NOPRO ("default-scroll-bar-width", | |
5428 | &buffer_defaults.scroll_bar_width, | |
5429 | doc: /* Default value of `scroll-bar-width' for buffers that don't override it. | |
5430 | This is the same as (default-value 'scroll-bar-width). */); | |
5431 | ||
5432 | DEFVAR_LISP_NOPRO ("default-vertical-scroll-bar", | |
5433 | &buffer_defaults.vertical_scroll_bar_type, | |
5434 | doc: /* Default value of `vertical-scroll-bar' for buffers that don't override it. | |
5435 | This is the same as (default-value 'vertical-scroll-bar). */); | |
5436 | ||
0552666b | 5437 | DEFVAR_LISP_NOPRO ("default-indicate-empty-lines", |
efc7e75f PJ |
5438 | &buffer_defaults.indicate_empty_lines, |
5439 | doc: /* Default value of `indicate-empty-lines' for buffers that don't override it. | |
018ba359 | 5440 | This is the same as (default-value 'indicate-empty-lines). */); |
177c0ea7 | 5441 | |
6b61353c KH |
5442 | DEFVAR_LISP_NOPRO ("default-indicate-buffer-boundaries", |
5443 | &buffer_defaults.indicate_buffer_boundaries, | |
5444 | doc: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it. | |
5445 | This is the same as (default-value 'indicate-buffer-boundaries). */); | |
5446 | ||
c6a46372 KS |
5447 | DEFVAR_LISP_NOPRO ("default-fringe-indicator-alist", |
5448 | &buffer_defaults.fringe_indicator_alist, | |
5449 | doc: /* Default value of `fringe-indicator-alist' for buffers that don't override it. | |
5450 | This is the same as (default-value 'fringe-indicator-alist'). */); | |
5451 | ||
5452 | DEFVAR_LISP_NOPRO ("default-fringe-cursor-alist", | |
5453 | &buffer_defaults.fringe_cursor_alist, | |
5454 | doc: /* Default value of `fringe-cursor-alist' for buffers that don't override it. | |
5455 | This is the same as (default-value 'fringe-cursor-alist'). */); | |
5456 | ||
0552666b | 5457 | DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively", |
efc7e75f | 5458 | &buffer_defaults.scroll_up_aggressively, |
7614d762 RS |
5459 | doc: /* Default value of `scroll-up-aggressively'. |
5460 | This value applies in buffers that don't have their own local values. | |
fc961256 | 5461 | This is the same as (default-value 'scroll-up-aggressively). */); |
177c0ea7 | 5462 | |
0552666b | 5463 | DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively", |
efc7e75f | 5464 | &buffer_defaults.scroll_down_aggressively, |
7614d762 RS |
5465 | doc: /* Default value of `scroll-down-aggressively'. |
5466 | This value applies in buffers that don't have their own local values. | |
fc961256 | 5467 | This is the same as (default-value 'scroll-down-aggressively). */); |
177c0ea7 | 5468 | |
045dee35 | 5469 | DEFVAR_PER_BUFFER ("header-line-format", |
018ba359 | 5470 | ¤t_buffer->header_line_format, |
7ee72033 | 5471 | Qnil, |
7614d762 RS |
5472 | doc: /* Analogous to `mode-line-format', but controls the header line. |
5473 | The header line appears, optionally, at the top of a window; | |
5474 | the mode line appears at the bottom. */); | |
177c0ea7 | 5475 | |
1ab256cb | 5476 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, |
efc7e75f PJ |
5477 | Qnil, |
5478 | doc: /* Template for displaying mode line for current buffer. | |
018ba359 PJ |
5479 | Each buffer has its own value of this variable. |
5480 | Value may be nil, a string, a symbol or a list or cons cell. | |
5481 | A value of nil means don't display a mode line. | |
5482 | For a symbol, its value is used (but it is ignored if t or nil). | |
5483 | A string appearing directly as the value of a symbol is processed verbatim | |
5484 | in that the %-constructs below are not recognized. | |
ed463255 | 5485 | Note that unless the symbol is marked as a `risky-local-variable', all |
177c0ea7 | 5486 | properties in any strings, as well as all :eval and :propertize forms |
ed463255 | 5487 | in the value of that symbol will be ignored. |
018ba359 | 5488 | For a list of the form `(:eval FORM)', FORM is evaluated and the result |
9c3eecf3 RS |
5489 | is used as a mode line element. Be careful--FORM should not load any files, |
5490 | because that can cause an infinite recursion. | |
ed463255 KS |
5491 | For a list of the form `(:propertize ELT PROPS...)', ELT is displayed |
5492 | with the specified properties PROPS applied. | |
018ba359 PJ |
5493 | For a list whose car is a symbol, the symbol's value is taken, |
5494 | and if that is non-nil, the cadr of the list is processed recursively. | |
5495 | Otherwise, the caddr of the list (if there is one) is processed. | |
5496 | For a list whose car is a string or list, each element is processed | |
5497 | recursively and the results are effectively concatenated. | |
5498 | For a list whose car is an integer, the cdr of the list is processed | |
5499 | and padded (if the number is positive) or truncated (if negative) | |
5500 | to the width specified by that number. | |
5501 | A string is printed verbatim in the mode line except for %-constructs: | |
5502 | (%-constructs are allowed when the string is the entire mode-line-format | |
5503 | or when it is found in a cons-cell or a list) | |
5504 | %b -- print buffer name. %f -- print visited file name. | |
5505 | %F -- print frame name. | |
5506 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen. | |
5507 | %& is like %*, but ignore read-only-ness. | |
5508 | % means buffer is read-only and * means it is modified. | |
5509 | For a modified read-only buffer, %* gives % and %+ gives *. | |
5510 | %s -- print process status. %l -- print the current line number. | |
5511 | %c -- print the current column number (this makes editing slower). | |
5512 | To make the column number update correctly in all cases, | |
5513 | `column-number-mode' must be non-nil. | |
6b61353c KH |
5514 | %i -- print the size of the buffer. |
5515 | %I -- like %i, but use k, M, G, etc., to abbreviate. | |
018ba359 PJ |
5516 | %p -- print percent of buffer above top of window, or Top, Bot or All. |
5517 | %P -- print percent of buffer above bottom of window, perhaps plus Top, | |
5518 | or print Bottom or All. | |
018ba359 | 5519 | %n -- print Narrow if appropriate. |
dafbe726 | 5520 | %t -- visited file is text or binary (if OS supports this distinction). |
47419860 | 5521 | %z -- print mnemonics of keyboard, terminal, and buffer coding systems. |
018ba359 | 5522 | %Z -- like %z, but including the end-of-line format. |
dafbe726 | 5523 | %e -- print error message about full memory. |
018ba359 PJ |
5524 | %[ -- print one [ for each recursive editing level. %] similar. |
5525 | %% -- print %. %- -- print infinitely many dashes. | |
5526 | Decimal digits after the % specify field width to which to pad. */); | |
5527 | ||
7ee72033 | 5528 | DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults.major_mode, |
efc7e75f | 5529 | doc: /* *Major mode for new buffers. Defaults to `fundamental-mode'. |
0493af6f JB |
5530 | A value of nil means use current buffer's major mode, |
5531 | provided it is not marked as "special". | |
557ca2c1 RS |
5532 | |
5533 | When a mode is used by default, `find-file' switches to it | |
5534 | before it reads the contents into the buffer and before | |
5535 | it finishes setting up the buffer. Thus, the mode and | |
5536 | its hooks should not expect certain variables such as | |
5537 | `buffer-read-only' and `buffer-file-coding-system' to be set up. */); | |
1ab256cb RM |
5538 | |
5539 | DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer->major_mode, | |
7ee72033 | 5540 | make_number (Lisp_Symbol), |
efc7e75f | 5541 | doc: /* Symbol for current buffer's major mode. */); |
1ab256cb RM |
5542 | |
5543 | DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer->mode_name, | |
c01d0677 | 5544 | Qnil, |
efc7e75f | 5545 | doc: /* Pretty name of current buffer's major mode (a string). */); |
1ab256cb | 5546 | |
7ee72033 | 5547 | DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer->abbrev_mode, Qnil, |
efc7e75f | 5548 | doc: /* Non-nil turns on automatic expansion of abbrevs as they are inserted. */); |
1ab256cb RM |
5549 | |
5550 | DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer->case_fold_search, | |
7ee72033 | 5551 | Qnil, |
efc7e75f | 5552 | doc: /* *Non-nil if searches and matches should ignore case. */); |
1ab256cb RM |
5553 | |
5554 | DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer->fill_column, | |
7ee72033 | 5555 | make_number (Lisp_Int), |
1ac5826d | 5556 | doc: /* *Column beyond which automatic line-wrapping should happen. |
f1ccb329 | 5557 | Interactively, you can set the buffer local value using \\[set-fill-column]. */); |
1ab256cb RM |
5558 | |
5559 | DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer->left_margin, | |
7ee72033 | 5560 | make_number (Lisp_Int), |
fc961256 | 5561 | doc: /* *Column for the default `indent-line-function' to indent to. |
018ba359 | 5562 | Linefeed indents to this column in Fundamental mode. */); |
1ab256cb RM |
5563 | |
5564 | DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer->tab_width, | |
7ee72033 | 5565 | make_number (Lisp_Int), |
efc7e75f | 5566 | doc: /* *Distance between tab stops (for display of tab characters), in columns. */); |
1ab256cb | 5567 | |
7ee72033 | 5568 | DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer->ctl_arrow, Qnil, |
efc7e75f | 5569 | doc: /* *Non-nil means display control chars with uparrow. |
018ba359 PJ |
5570 | A value of nil means use backslash and octal digits. |
5571 | This variable does not apply to characters whose display is specified | |
5572 | in the current display table (if there is one). */); | |
1ab256cb | 5573 | |
3b06f880 | 5574 | DEFVAR_PER_BUFFER ("enable-multibyte-characters", |
1bf08baf | 5575 | ¤t_buffer->enable_multibyte_characters, |
a9b9a780 | 5576 | Qnil, |
efc7e75f | 5577 | doc: /* Non-nil means the buffer contents are regarded as multi-byte characters. |
018ba359 PJ |
5578 | Otherwise they are regarded as unibyte. This affects the display, |
5579 | file I/O and the behavior of various editing commands. | |
5580 | ||
5581 | This variable is buffer-local but you cannot set it directly; | |
5582 | use the function `set-buffer-multibyte' to change a buffer's representation. | |
5583 | Changing its default value with `setq-default' is supported. | |
5584 | See also variable `default-enable-multibyte-characters' and Info node | |
5585 | `(elisp)Text Representations'. */); | |
a9b9a780 | 5586 | XSYMBOL (intern ("enable-multibyte-characters"))->constant = 1; |
3b06f880 | 5587 | |
c71b5d9b | 5588 | DEFVAR_PER_BUFFER ("buffer-file-coding-system", |
7ee72033 | 5589 | ¤t_buffer->buffer_file_coding_system, Qnil, |
efc7e75f | 5590 | doc: /* Coding system to be used for encoding the buffer contents on saving. |
018ba359 PJ |
5591 | This variable applies to saving the buffer, and also to `write-region' |
5592 | and other functions that use `write-region'. | |
5593 | It does not apply to sending output to subprocesses, however. | |
5594 | ||
5595 | If this is nil, the buffer is saved without any code conversion | |
5596 | unless some coding system is specified in `file-coding-system-alist' | |
5597 | for the buffer file. | |
5598 | ||
31a6cb06 EZ |
5599 | If the text to be saved cannot be encoded as specified by this variable, |
5600 | an alternative encoding is selected by `select-safe-coding-system', which see. | |
5601 | ||
018ba359 PJ |
5602 | The variable `coding-system-for-write', if non-nil, overrides this variable. |
5603 | ||
5604 | This variable is never applied to a way of decoding a file while reading it. */); | |
c71b5d9b | 5605 | |
3b06f880 | 5606 | DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer->direction_reversed, |
7ee72033 | 5607 | Qnil, |
efc7e75f | 5608 | doc: /* *Non-nil means lines in the buffer are displayed right to left. */); |
3b06f880 | 5609 | |
7ee72033 | 5610 | DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer->truncate_lines, Qnil, |
7614d762 RS |
5611 | doc: /* *Non-nil means do not display continuation lines. |
5612 | Instead, give each line of text just one screen line. | |
018ba359 PJ |
5613 | |
5614 | Note that this is overridden by the variable | |
5615 | `truncate-partial-width-windows' if that variable is non-nil | |
5616 | and this buffer is not full-frame width. */); | |
1ab256cb | 5617 | |
f7975d07 | 5618 | #ifdef DOS_NT |
54ad07d3 | 5619 | DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer->buffer_file_type, |
7ee72033 | 5620 | Qnil, |
efc7e75f | 5621 | doc: /* Non-nil if the visited file is a binary file. |
018ba359 PJ |
5622 | This variable is meaningful on MS-DOG and Windows NT. |
5623 | On those systems, it is automatically local in every buffer. | |
5624 | On other systems, this variable is normally always nil. */); | |
54ad07d3 RS |
5625 | #endif |
5626 | ||
1ab256cb | 5627 | DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer->directory, |
7ee72033 | 5628 | make_number (Lisp_String), |
efc7e75f | 5629 | doc: /* Name of default directory of current buffer. Should end with slash. |
018ba359 | 5630 | To interactively change the default directory, use command `cd'. */); |
1ab256cb RM |
5631 | |
5632 | DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer->auto_fill_function, | |
7ee72033 | 5633 | Qnil, |
efc7e75f | 5634 | doc: /* Function called (if non-nil) to perform auto-fill. |
018ba359 PJ |
5635 | It is called after self-inserting any character specified in |
5636 | the `auto-fill-chars' table. | |
5637 | NOTE: This variable is not a hook; | |
5638 | its value may not be a list of functions. */); | |
1ab256cb RM |
5639 | |
5640 | DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer->filename, | |
7ee72033 | 5641 | make_number (Lisp_String), |
efc7e75f | 5642 | doc: /* Name of file visited in current buffer, or nil if not visiting a file. */); |
1ab256cb | 5643 | |
f6ed2e84 | 5644 | DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer->file_truename, |
7ee72033 | 5645 | make_number (Lisp_String), |
efc7e75f | 5646 | doc: /* Abbreviated truename of file visited in current buffer, or nil if none. |
018ba359 PJ |
5647 | The truename of a file is calculated by `file-truename' |
5648 | and then abbreviated with `abbreviate-file-name'. */); | |
f6ed2e84 | 5649 | |
1ab256cb | 5650 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", |
3f5fcd47 | 5651 | ¤t_buffer->auto_save_file_name, |
7ee72033 | 5652 | make_number (Lisp_String), |
7614d762 RS |
5653 | doc: /* Name of file for auto-saving current buffer. |
5654 | If it is nil, that means don't auto-save this buffer. */); | |
1ab256cb | 5655 | |
7ee72033 | 5656 | DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer->read_only, Qnil, |
efc7e75f | 5657 | doc: /* Non-nil if this buffer is read-only. */); |
1ab256cb | 5658 | |
7ee72033 | 5659 | DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer->backed_up, Qnil, |
efc7e75f | 5660 | doc: /* Non-nil if this buffer's file has been backed up. |
018ba359 | 5661 | Backing up is done before the first time the file is saved. */); |
1ab256cb RM |
5662 | |
5663 | DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer->save_length, | |
7ee72033 | 5664 | make_number (Lisp_Int), |
efc7e75f | 5665 | doc: /* Length of current buffer when last read in, saved or auto-saved. |
018ba359 | 5666 | 0 initially. */); |
1ab256cb RM |
5667 | |
5668 | DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer->selective_display, | |
7ee72033 | 5669 | Qnil, |
7614d762 RS |
5670 | doc: /* Non-nil enables selective display. |
5671 | An Integer N as value means display only lines | |
5672 | that start with less than n columns of space. | |
5673 | A value of t means that the character ^M makes itself and | |
5674 | all the rest of the line invisible; also, when saving the buffer | |
5675 | in a file, save the ^M as a newline. */); | |
1ab256cb RM |
5676 | |
5677 | #ifndef old | |
5678 | DEFVAR_PER_BUFFER ("selective-display-ellipses", | |
5679 | ¤t_buffer->selective_display_ellipses, | |
7ee72033 | 5680 | Qnil, |
3f676284 | 5681 | doc: /* Non-nil means display ... on previous line when a line is invisible. */); |
1ab256cb RM |
5682 | #endif |
5683 | ||
7ee72033 | 5684 | DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer->overwrite_mode, Qnil, |
efc7e75f | 5685 | doc: /* Non-nil if self-insertion should replace existing text. |
018ba359 PJ |
5686 | The value should be one of `overwrite-mode-textual', |
5687 | `overwrite-mode-binary', or nil. | |
5688 | If it is `overwrite-mode-textual', self-insertion still | |
5689 | inserts at the end of a line, and inserts when point is before a tab, | |
5690 | until the tab is filled in. | |
5691 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */); | |
5692 | ||
54939090 | 5693 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, |
7ee72033 | 5694 | Qnil, |
efc7e75f | 5695 | doc: /* Display table that controls display of the contents of current buffer. |
018ba359 PJ |
5696 | |
5697 | If this variable is nil, the value of `standard-display-table' is used. | |
5698 | Each window can have its own, overriding display table, see | |
5699 | `set-window-display-table' and `window-display-table'. | |
5700 | ||
5701 | The display table is a char-table created with `make-display-table'. | |
5702 | A char-table is an array indexed by character codes. Normal array | |
5703 | primitives `aref' and `aset' can be used to access elements of a char-table. | |
5704 | ||
5705 | Each of the char-table elements control how to display the corresponding | |
5706 | text character: the element at index C in the table says how to display | |
5707 | the character whose code is C. Each element should be a vector of | |
426a9163 JB |
5708 | characters or nil. The value nil means display the character in the |
5709 | default fashion; otherwise, the characters from the vector are delivered | |
5710 | to the screen instead of the original character. | |
018ba359 | 5711 | |
5fd11dc8 | 5712 | For example, (aset buffer-display-table ?X [?Y]) tells Emacs |
adbb3b05 | 5713 | to display a capital Y instead of each X character. |
018ba359 PJ |
5714 | |
5715 | In addition, a char-table has six extra slots to control the display of: | |
5716 | ||
5717 | the end of a truncated screen line (extra-slot 0, a single character); | |
5718 | the end of a continued line (extra-slot 1, a single character); | |
5719 | the escape character used to display character codes in octal | |
5720 | (extra-slot 2, a single character); | |
5721 | the character used as an arrow for control characters (extra-slot 3, | |
5722 | a single character); | |
5723 | the decoration indicating the presence of invisible lines (extra-slot 4, | |
5724 | a vector of characters); | |
5725 | the character used to draw the border between side-by-side windows | |
5726 | (extra-slot 5, a single character). | |
5727 | ||
5728 | See also the functions `display-table-slot' and `set-display-table-slot'. */); | |
1ab256cb | 5729 | |
2ad8731a | 5730 | DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer->left_margin_cols, |
7ee72033 | 5731 | Qnil, |
efc7e75f | 5732 | doc: /* *Width of left marginal area for display of a buffer. |
018ba359 | 5733 | A value of nil means no marginal area. */); |
177c0ea7 | 5734 | |
2ad8731a | 5735 | DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer->right_margin_cols, |
7ee72033 | 5736 | Qnil, |
efc7e75f | 5737 | doc: /* *Width of right marginal area for display of a buffer. |
018ba359 | 5738 | A value of nil means no marginal area. */); |
177c0ea7 | 5739 | |
2ad8731a KS |
5740 | DEFVAR_PER_BUFFER ("left-fringe-width", ¤t_buffer->left_fringe_width, |
5741 | Qnil, | |
5742 | doc: /* *Width of this buffer's left fringe (in pixels). | |
5743 | A value of 0 means no left fringe is shown in this buffer's window. | |
5744 | A value of nil means to use the left fringe width from the window's frame. */); | |
5745 | ||
5746 | DEFVAR_PER_BUFFER ("right-fringe-width", ¤t_buffer->right_fringe_width, | |
5747 | Qnil, | |
5748 | doc: /* *Width of this buffer's right fringe (in pixels). | |
5749 | A value of 0 means no right fringe is shown in this buffer's window. | |
5750 | A value of nil means to use the right fringe width from the window's frame. */); | |
5751 | ||
5752 | DEFVAR_PER_BUFFER ("fringes-outside-margins", ¤t_buffer->fringes_outside_margins, | |
5753 | Qnil, | |
5754 | doc: /* *Non-nil means to display fringes outside display margins. | |
5755 | A value of nil means to display fringes between margins and buffer text. */); | |
5756 | ||
5757 | DEFVAR_PER_BUFFER ("scroll-bar-width", ¤t_buffer->scroll_bar_width, | |
5758 | Qnil, | |
5759 | doc: /* *Width of this buffer's scroll bars in pixels. | |
5760 | A value of nil means to use the scroll bar width from the window's frame. */); | |
5761 | ||
5762 | DEFVAR_PER_BUFFER ("vertical-scroll-bar", ¤t_buffer->vertical_scroll_bar_type, | |
5763 | Qnil, | |
5764 | doc: /* *Position of this buffer's vertical scroll bar. | |
7c6b2007 | 5765 | The value takes effect whenever you tell a window to display this buffer; |
188577ce | 5766 | for instance, with `set-window-buffer' or when `display-buffer' displays it. |
7c6b2007 | 5767 | |
fc2c8887 RS |
5768 | A value of `left' or `right' means put the vertical scroll bar at that side |
5769 | of the window; a value of nil means don't show any vertical scroll bars. | |
5770 | A value of t (the default) means do whatever the window's frame specifies. */); | |
2ad8731a | 5771 | |
0552666b | 5772 | DEFVAR_PER_BUFFER ("indicate-empty-lines", |
7ee72033 | 5773 | ¤t_buffer->indicate_empty_lines, Qnil, |
efc7e75f | 5774 | doc: /* *Visually indicate empty lines after the buffer end. |
018ba359 PJ |
5775 | If non-nil, a bitmap is displayed in the left fringe of a window on |
5776 | window-systems. */); | |
177c0ea7 | 5777 | |
6b61353c KH |
5778 | DEFVAR_PER_BUFFER ("indicate-buffer-boundaries", |
5779 | ¤t_buffer->indicate_buffer_boundaries, Qnil, | |
5780 | doc: /* *Visually indicate buffer boundaries and scrolling. | |
5781 | If non-nil, the first and last line of the buffer are marked in the fringe | |
5782 | of a window on window-systems with angle bitmaps, or if the window can be | |
5783 | scrolled, the top and bottom line of the window are marked with up and down | |
5784 | arrow bitmaps. | |
b2229037 KS |
5785 | |
5786 | If value is a symbol `left' or `right', both angle and arrow bitmaps | |
79e3497d | 5787 | are displayed in the left or right fringe, resp. Any other value |
845a78b4 | 5788 | that doesn't look like an alist means display the angle bitmaps in |
79e3497d | 5789 | the left fringe but no arrows. |
b2229037 | 5790 | |
79e3497d RS |
5791 | You can exercise more precise control by using an alist as the |
5792 | value. Each alist element (INDICATOR . POSITION) specifies | |
5793 | where to show one of the indicators. INDICATOR is one of `top', | |
b2229037 KS |
5794 | `bottom', `up', `down', or t, which specifies the default position, |
5795 | and POSITION is one of `left', `right', or nil, meaning do not show | |
5796 | this indicator. | |
5797 | ||
5798 | For example, ((top . left) (t . right)) places the top angle bitmap in | |
5799 | left fringe, the bottom angle bitmap in right fringe, and both arrow | |
6b61353c | 5800 | bitmaps in right fringe. To show just the angle bitmaps in the left |
b2229037 | 5801 | fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */); |
6b61353c | 5802 | |
c6a46372 KS |
5803 | DEFVAR_PER_BUFFER ("fringe-indicator-alist", |
5804 | ¤t_buffer->fringe_indicator_alist, Qnil, | |
5805 | doc: /* *Mapping from logical to physical fringe indicator bitmaps. | |
5806 | The value is an alist where each element (INDICATOR . BITMAPS) | |
5807 | specifies the fringe bitmaps used to display a specific logical | |
5808 | fringe indicator. | |
5809 | ||
5810 | INDICATOR specifies the logical indicator type which is one of the | |
5811 | following symbols: `truncation' , `continuation', `overlay-arrow', | |
5812 | `top', `bottom', `up', `down', `one-line', `empty-line', or `unknown'. | |
5813 | ||
5814 | BITMAPS is list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies | |
5815 | the actual bitmap shown in the left or right fringe for the logical | |
5816 | indicator. LEFT and RIGHT are the bitmaps shown in the left and/or | |
5817 | right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps | |
5818 | are used only for the `bottom' and `one-line' indicators when the last | |
63af6055 | 5819 | \(only) line in has no final newline. BITMAPS may also be a single |
c6a46372 KS |
5820 | symbol which is used in both left and right fringes. */); |
5821 | ||
5822 | DEFVAR_PER_BUFFER ("fringe-cursor-alist", | |
5823 | ¤t_buffer->fringe_cursor_alist, Qnil, | |
5824 | doc: /* *Mapping from logical to physical fringe cursor bitmaps. | |
5825 | The value is an alist where each element (CURSOR . BITMAP) | |
5826 | specifies the fringe bitmaps used to display a specific logical | |
5827 | cursor type in the fringe. | |
5828 | ||
5829 | CURSOR specifies the logical cursor type which is one of the following | |
5830 | symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last | |
5831 | one is used to show a hollow cursor on narrow lines display lines | |
5832 | where the normal hollow cursor will not fit. | |
5833 | ||
5834 | BITMAP is the corresponding fringe bitmap shown for the logical | |
5835 | cursor type. */); | |
5836 | ||
0552666b | 5837 | DEFVAR_PER_BUFFER ("scroll-up-aggressively", |
7ee72033 | 5838 | ¤t_buffer->scroll_up_aggressively, Qnil, |
4e0692c1 RS |
5839 | doc: /* How far to scroll windows upward. |
5840 | If you move point off the bottom, the window scrolls automatically. | |
426a9163 | 5841 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
5842 | means scroll to center point. A fraction means scroll to put point |
5843 | that fraction of the window's height from the bottom of the window. | |
5844 | When the value is 0.0, point goes at the bottom line, which in the simple | |
5845 | case that you moved off with C-f means scrolling just one line. 1.0 means | |
5846 | point goes at the top, so that in that simple case, the window | |
e5f95d5c | 5847 | scrolls by a full window height. Meaningful values are |
175e9712 | 5848 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 5849 | |
0552666b | 5850 | DEFVAR_PER_BUFFER ("scroll-down-aggressively", |
7ee72033 | 5851 | ¤t_buffer->scroll_down_aggressively, Qnil, |
4e0692c1 RS |
5852 | doc: /* How far to scroll windows downward. |
5853 | If you move point off the top, the window scrolls automatically. | |
426a9163 | 5854 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
5855 | means scroll to center point. A fraction means scroll to put point |
5856 | that fraction of the window's height from the top of the window. | |
5857 | When the value is 0.0, point goes at the top line, which in the simple | |
5858 | case that you moved off with C-b means scrolling just one line. 1.0 means | |
5859 | point goes at the bottom, so that in that simple case, the window | |
e5f95d5c | 5860 | scrolls by a full window height. Meaningful values are |
175e9712 | 5861 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 5862 | |
1ab256cb RM |
5863 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
5864 | "Don't ask."); | |
5865 | */ | |
1ab256cb | 5866 | |
7ee72033 MB |
5867 | DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions, |
5868 | doc: /* List of functions to call before each text change. | |
018ba359 PJ |
5869 | Two arguments are passed to each function: the positions of |
5870 | the beginning and end of the range of old text to be changed. | |
5871 | \(For an insertion, the beginning and end are at the same place.) | |
5872 | No information is given about the length of the text after the change. | |
5873 | ||
5874 | Buffer changes made while executing the `before-change-functions' | |
5875 | don't call any before-change or after-change functions. | |
5876 | That's because these variables are temporarily set to nil. | |
5877 | As a result, a hook function cannot straightforwardly alter the value of | |
5878 | these variables. See the Emacs Lisp manual for a way of | |
5879 | accomplishing an equivalent result by using other variables. | |
5880 | ||
5881 | If an unhandled error happens in running these functions, | |
5882 | the variable's value remains nil. That prevents the error | |
5883 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
5884 | Vbefore_change_functions = Qnil; |
5885 | ||
7ee72033 | 5886 | DEFVAR_LISP ("after-change-functions", &Vafter_change_functions, |
eacdfade | 5887 | doc: /* List of functions to call after each text change. |
018ba359 PJ |
5888 | Three arguments are passed to each function: the positions of |
5889 | the beginning and end of the range of changed text, | |
5890 | and the length in bytes of the pre-change text replaced by that range. | |
5891 | \(For an insertion, the pre-change length is zero; | |
5892 | for a deletion, that length is the number of bytes deleted, | |
5893 | and the post-change beginning and end are at the same place.) | |
5894 | ||
5895 | Buffer changes made while executing the `after-change-functions' | |
5896 | don't call any before-change or after-change functions. | |
5897 | That's because these variables are temporarily set to nil. | |
5898 | As a result, a hook function cannot straightforwardly alter the value of | |
5899 | these variables. See the Emacs Lisp manual for a way of | |
5900 | accomplishing an equivalent result by using other variables. | |
5901 | ||
5902 | If an unhandled error happens in running these functions, | |
5903 | the variable's value remains nil. That prevents the error | |
5904 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
5905 | Vafter_change_functions = Qnil; |
5906 | ||
7ee72033 | 5907 | DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook, |
efc7e75f | 5908 | doc: /* A list of functions to call before changing a buffer which is unmodified. |
018ba359 | 5909 | The functions are run using the `run-hooks' function. */); |
dbc4e1c1 | 5910 | Vfirst_change_hook = Qnil; |
1ab256cb | 5911 | |
7ee72033 MB |
5912 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, |
5913 | doc: /* List of undo entries in current buffer. | |
018ba359 PJ |
5914 | Recent changes come first; older changes follow newer. |
5915 | ||
5916 | An entry (BEG . END) represents an insertion which begins at | |
5917 | position BEG and ends at position END. | |
5918 | ||
5919 | An entry (TEXT . POSITION) represents the deletion of the string TEXT | |
5920 | from (abs POSITION). If POSITION is positive, point was at the front | |
5921 | of the text being deleted; if negative, point was at the end. | |
5922 | ||
5923 | An entry (t HIGH . LOW) indicates that the buffer previously had | |
5924 | \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions | |
5925 | of the visited file's modification time, as of that time. If the | |
5926 | modification time of the most recent save is different, this entry is | |
5927 | obsolete. | |
5928 | ||
5929 | An entry (nil PROPERTY VALUE BEG . END) indicates that a text property | |
5930 | was modified between BEG and END. PROPERTY is the property name, | |
5931 | and VALUE is the old value. | |
5932 | ||
7405f386 KS |
5933 | An entry (apply FUN-NAME . ARGS) means undo the change with |
5934 | \(apply FUN-NAME ARGS). | |
5935 | ||
5936 | An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo | |
5937 | in the active region. BEG and END is the range affected by this entry | |
5938 | and DELTA is the number of bytes added or deleted in that range by | |
5939 | this change. | |
c6c7dc03 | 5940 | |
018ba359 PJ |
5941 | An entry (MARKER . DISTANCE) indicates that the marker MARKER |
5942 | was adjusted in position by the offset DISTANCE (an integer). | |
5943 | ||
5944 | An entry of the form POSITION indicates that point was at the buffer | |
5945 | location given by the integer. Undoing an entry of this form places | |
5946 | point at POSITION. | |
5947 | ||
b4c4f2f4 JB |
5948 | Entries with value `nil' mark undo boundaries. The undo command treats |
5949 | the changes between two undo boundaries as a single step to be undone. | |
018ba359 PJ |
5950 | |
5951 | If the value of the variable is t, undo information is not recorded. */); | |
5952 | ||
7ee72033 MB |
5953 | DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer->mark_active, Qnil, |
5954 | doc: /* Non-nil means the mark and region are currently active in this buffer. */); | |
018ba359 | 5955 | |
7ee72033 MB |
5956 | DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer->cache_long_line_scans, Qnil, |
5957 | doc: /* Non-nil means that Emacs should use caches to handle long lines more quickly. | |
018ba359 PJ |
5958 | |
5959 | Normally, the line-motion functions work by scanning the buffer for | |
5629f29b DK |
5960 | newlines. Columnar operations (like `move-to-column' and |
5961 | `compute-motion') also work by scanning the buffer, summing character | |
018ba359 PJ |
5962 | widths as they go. This works well for ordinary text, but if the |
5963 | buffer's lines are very long (say, more than 500 characters), these | |
5964 | motion functions will take longer to execute. Emacs may also take | |
5965 | longer to update the display. | |
5966 | ||
5629f29b | 5967 | If `cache-long-line-scans' is non-nil, these motion functions cache the |
018ba359 PJ |
5968 | results of their scans, and consult the cache to avoid rescanning |
5969 | regions of the buffer until the text is modified. The caches are most | |
5970 | beneficial when they prevent the most searching---that is, when the | |
5971 | buffer contains long lines and large regions of characters with the | |
5972 | same, fixed screen width. | |
5973 | ||
5629f29b | 5974 | When `cache-long-line-scans' is non-nil, processing short lines will |
018ba359 PJ |
5975 | become slightly slower (because of the overhead of consulting the |
5976 | cache), and the caches will use memory roughly proportional to the | |
5977 | number of newlines and characters whose screen width varies. | |
5978 | ||
5979 | The caches require no explicit maintenance; their accuracy is | |
5980 | maintained internally by the Emacs primitives. Enabling or disabling | |
5981 | the cache should not affect the behavior of any of the motion | |
5982 | functions; it should only affect their performance. */); | |
5983 | ||
7ee72033 MB |
5984 | DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer->point_before_scroll, Qnil, |
5985 | doc: /* Value of point before the last series of scroll operations, or nil. */); | |
018ba359 | 5986 | |
7ee72033 MB |
5987 | DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer->file_format, Qnil, |
5988 | doc: /* List of formats to use when saving this buffer. | |
018ba359 | 5989 | Formats are defined by `format-alist'. This variable is |
a9b9a780 | 5990 | set when a file is visited. */); |
be9aafdd | 5991 | |
71ed49fa LT |
5992 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-format", |
5993 | ¤t_buffer->auto_save_file_format, Qnil, | |
5994 | doc: /* *Format in which to write auto-save files. | |
5995 | Should be a list of symbols naming formats that are defined in `format-alist'. | |
5996 | If it is t, which is the default, auto-save files are written in the | |
5997 | same format as a regular save would use. */); | |
5998 | ||
3cb719bd | 5999 | DEFVAR_PER_BUFFER ("buffer-invisibility-spec", |
7ee72033 MB |
6000 | ¤t_buffer->invisibility_spec, Qnil, |
6001 | doc: /* Invisibility spec of this buffer. | |
018ba359 PJ |
6002 | The default is t, which means that text is invisible |
6003 | if it has a non-nil `invisible' property. | |
6004 | If the value is a list, a text character is invisible if its `invisible' | |
b49dd850 | 6005 | property is an element in that list (or is a list with members in common). |
018ba359 PJ |
6006 | If an element is a cons cell of the form (PROP . ELLIPSIS), |
6007 | then characters with property value PROP are invisible, | |
6008 | and they have an ellipsis as well if ELLIPSIS is non-nil. */); | |
3cb719bd | 6009 | |
7962a441 | 6010 | DEFVAR_PER_BUFFER ("buffer-display-count", |
7ee72033 MB |
6011 | ¤t_buffer->display_count, Qnil, |
6012 | doc: /* A number incremented each time this buffer is displayed in a window. | |
018ba359 | 6013 | The function `set-window-buffer' increments it. */); |
3fd364db RS |
6014 | |
6015 | DEFVAR_PER_BUFFER ("buffer-display-time", | |
7ee72033 MB |
6016 | ¤t_buffer->display_time, Qnil, |
6017 | doc: /* Time stamp updated each time this buffer is displayed in a window. | |
018ba359 PJ |
6018 | The function `set-window-buffer' updates this variable |
6019 | to the value obtained by calling `current-time'. | |
6020 | If the buffer has never been shown in a window, the value is nil. */); | |
6021 | ||
7ee72033 MB |
6022 | DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode, |
6023 | doc: /* *Non-nil means deactivate the mark when the buffer contents change. | |
018ba359 PJ |
6024 | Non-nil also enables highlighting of the region whenever the mark is active. |
6025 | The variable `highlight-nonselected-windows' controls whether to highlight | |
5a39b770 RS |
6026 | all windows or just the selected window. |
6027 | ||
6028 | If the value is `lambda', that enables Transient Mark mode temporarily | |
6029 | until the next buffer modification. If a command sets the value to `only', | |
b3264fd2 RS |
6030 | that enables Transient Mark mode for the following command only. |
6031 | During that following command, the value of `transient-mark-mode' | |
6032 | is `identity'. If it is still `identity' at the end of that command, | |
6033 | it changes to nil. */); | |
c48f61ef RS |
6034 | Vtransient_mark_mode = Qnil; |
6035 | ||
7ee72033 MB |
6036 | DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only, |
6037 | doc: /* *Non-nil means disregard read-only status of buffers or characters. | |
018ba359 PJ |
6038 | If the value is t, disregard `buffer-read-only' and all `read-only' |
6039 | text properties. If the value is a list, disregard `buffer-read-only' | |
6040 | and disregard a `read-only' text property if the property value | |
6041 | is a member of the list. */); | |
a96b68f1 RS |
6042 | Vinhibit_read_only = Qnil; |
6043 | ||
7ee72033 | 6044 | DEFVAR_PER_BUFFER ("cursor-type", ¤t_buffer->cursor_type, Qnil, |
f6e22881 | 6045 | doc: /* Cursor to use when this buffer is in the selected window. |
018ba359 PJ |
6046 | Values are interpreted as follows: |
6047 | ||
b8dc613f JB |
6048 | t use the cursor specified for the frame |
6049 | nil don't display a cursor | |
6050 | box display a filled box cursor | |
6051 | hollow display a hollow box cursor | |
6052 | bar display a vertical bar cursor with default width | |
6053 | (bar . WIDTH) display a vertical bar cursor with width WIDTH | |
6054 | hbar display a horizontal bar cursor with default height | |
b4234f4c | 6055 | (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT |
b8dc613f | 6056 | ANYTHING ELSE display a hollow box cursor |
cd8d5236 RS |
6057 | |
6058 | When the buffer is displayed in a nonselected window, | |
6059 | this variable has no effect; the cursor appears as a hollow box. */); | |
bb2ec976 | 6060 | |
a3bbced0 | 6061 | DEFVAR_PER_BUFFER ("line-spacing", |
7ee72033 MB |
6062 | ¤t_buffer->extra_line_spacing, Qnil, |
6063 | doc: /* Additional space to put between lines when displaying a buffer. | |
60ebfdf3 KS |
6064 | The space is measured in pixels, and put below lines on window systems. |
6065 | If value is a floating point number, it specifies the spacing relative | |
fc961256 | 6066 | to the default frame line height. A value of nil means add no extra space. */); |
a3bbced0 | 6067 | |
0124c5bd | 6068 | DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows", |
187ccf49 | 6069 | ¤t_buffer->cursor_in_non_selected_windows, Qnil, |
f6e22881 | 6070 | doc: /* *Cursor type to display in non-selected windows. |
fc961256 | 6071 | The value t means to use hollow box cursor. See `cursor-type' for other values. */); |
0124c5bd | 6072 | |
7ee72033 | 6073 | DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions, |
f6e22881 JB |
6074 | doc: /* List of functions called with no args to query before killing a buffer. |
6075 | The buffer being killed will be current while the functions are running. | |
6076 | If any of them returns nil, the buffer is not killed. */); | |
dcdffbf6 RS |
6077 | Vkill_buffer_query_functions = Qnil; |
6078 | ||
43ed3b8d CY |
6079 | DEFVAR_LISP ("change-major-mode-hook", &Vchange_major_mode_hook, |
6080 | doc: /* Normal hook run before changing the major mode of a buffer. | |
6081 | The function `kill-all-local-variables' runs this before doing anything else. */); | |
6082 | Vchange_major_mode_hook = Qnil; | |
6083 | Qchange_major_mode_hook = intern ("change-major-mode-hook"); | |
6084 | staticpro (&Qchange_major_mode_hook); | |
6085 | ||
0dc88e60 | 6086 | defsubr (&Sbuffer_live_p); |
1ab256cb RM |
6087 | defsubr (&Sbuffer_list); |
6088 | defsubr (&Sget_buffer); | |
6089 | defsubr (&Sget_file_buffer); | |
6090 | defsubr (&Sget_buffer_create); | |
336cd056 | 6091 | defsubr (&Smake_indirect_buffer); |
01050cb5 | 6092 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb RM |
6093 | defsubr (&Sbuffer_name); |
6094 | /*defsubr (&Sbuffer_number);*/ | |
6095 | defsubr (&Sbuffer_file_name); | |
336cd056 | 6096 | defsubr (&Sbuffer_base_buffer); |
79aa712d | 6097 | defsubr (&Sbuffer_local_value); |
1ab256cb RM |
6098 | defsubr (&Sbuffer_local_variables); |
6099 | defsubr (&Sbuffer_modified_p); | |
6100 | defsubr (&Sset_buffer_modified_p); | |
6101 | defsubr (&Sbuffer_modified_tick); | |
3e145152 | 6102 | defsubr (&Sbuffer_chars_modified_tick); |
1ab256cb RM |
6103 | defsubr (&Srename_buffer); |
6104 | defsubr (&Sother_buffer); | |
1ab256cb RM |
6105 | defsubr (&Sbuffer_enable_undo); |
6106 | defsubr (&Skill_buffer); | |
a9ee7a59 | 6107 | defsubr (&Sset_buffer_major_mode); |
1ab256cb RM |
6108 | defsubr (&Sswitch_to_buffer); |
6109 | defsubr (&Spop_to_buffer); | |
6110 | defsubr (&Scurrent_buffer); | |
6111 | defsubr (&Sset_buffer); | |
6112 | defsubr (&Sbarf_if_buffer_read_only); | |
6113 | defsubr (&Sbury_buffer); | |
3ac81adb RS |
6114 | defsubr (&Serase_buffer); |
6115 | defsubr (&Sset_buffer_multibyte); | |
1ab256cb | 6116 | defsubr (&Skill_all_local_variables); |
2eec3b4e | 6117 | |
52f8ec73 | 6118 | defsubr (&Soverlayp); |
2eec3b4e RS |
6119 | defsubr (&Smake_overlay); |
6120 | defsubr (&Sdelete_overlay); | |
6121 | defsubr (&Smove_overlay); | |
8ebafa8d JB |
6122 | defsubr (&Soverlay_start); |
6123 | defsubr (&Soverlay_end); | |
6124 | defsubr (&Soverlay_buffer); | |
6125 | defsubr (&Soverlay_properties); | |
2eec3b4e | 6126 | defsubr (&Soverlays_at); |
74514898 | 6127 | defsubr (&Soverlays_in); |
2eec3b4e | 6128 | defsubr (&Snext_overlay_change); |
239c932b | 6129 | defsubr (&Sprevious_overlay_change); |
2eec3b4e RS |
6130 | defsubr (&Soverlay_recenter); |
6131 | defsubr (&Soverlay_lists); | |
6132 | defsubr (&Soverlay_get); | |
6133 | defsubr (&Soverlay_put); | |
a8c21b48 | 6134 | defsubr (&Srestore_buffer_modified_p); |
1ab256cb RM |
6135 | } |
6136 | ||
dfcf069d | 6137 | void |
1ab256cb RM |
6138 | keys_of_buffer () |
6139 | { | |
6140 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
6141 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
4158c17d RM |
6142 | |
6143 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
6144 | initialized when that function gets called. */ | |
6145 | Fput (intern ("erase-buffer"), Qdisabled, Qt); | |
1ab256cb | 6146 | } |
6b61353c KH |
6147 | |
6148 | /* arch-tag: e48569bf-69a9-4b65-a23b-8e68769436e1 | |
6149 | (do not change this comment) */ |