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1ab256cb | 1 | /* Buffer manipulation primitives for GNU Emacs. |
0b5538bd TTN |
2 | Copyright (C) 1985, 1986, 1987, 1988, 1989, 1993, 1994, |
3 | 1995, 1997, 1998, 1999, 2000, 2001, 2002, | |
0b5397c2 | 4 | 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 |
8cabe764 | 5 | Free Software Foundation, Inc. |
1ab256cb RM |
6 | |
7 | This file is part of GNU Emacs. | |
8 | ||
9ec0b715 | 9 | GNU Emacs is free software: you can redistribute it and/or modify |
1ab256cb | 10 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
11 | the Free Software Foundation, either version 3 of the License, or |
12 | (at your option) any later version. | |
1ab256cb RM |
13 | |
14 | GNU Emacs is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 20 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
1ab256cb | 21 | |
68c45bf0 | 22 | #include <config.h> |
1ab256cb | 23 | |
2381d133 JB |
24 | #include <sys/types.h> |
25 | #include <sys/stat.h> | |
1ab256cb | 26 | #include <sys/param.h> |
9dde47f5 | 27 | #include <errno.h> |
15e7873a | 28 | #include <stdio.h> |
d7306fe6 | 29 | #include <setjmp.h> |
9dde47f5 | 30 | |
dfcf069d AS |
31 | #ifdef HAVE_UNISTD_H |
32 | #include <unistd.h> | |
33 | #endif | |
7ee72033 | 34 | |
1ab256cb | 35 | #include "lisp.h" |
21cf4cf8 | 36 | #include "intervals.h" |
1ab256cb RM |
37 | #include "window.h" |
38 | #include "commands.h" | |
39 | #include "buffer.h" | |
8f348ed5 | 40 | #include "character.h" |
28e969dd | 41 | #include "region-cache.h" |
1ab256cb | 42 | #include "indent.h" |
d014bf88 | 43 | #include "blockinput.h" |
2538fae4 | 44 | #include "keyboard.h" |
e35f6ff7 | 45 | #include "keymap.h" |
08460cd4 | 46 | #include "frame.h" |
1ab256cb RM |
47 | |
48 | struct buffer *current_buffer; /* the current buffer */ | |
49 | ||
50 | /* First buffer in chain of all buffers (in reverse order of creation). | |
51 | Threaded through ->next. */ | |
52 | ||
53 | struct buffer *all_buffers; | |
54 | ||
55 | /* This structure holds the default values of the buffer-local variables | |
56 | defined with DEFVAR_PER_BUFFER, that have special slots in each buffer. | |
57 | The default value occupies the same slot in this structure | |
58 | as an individual buffer's value occupies in that buffer. | |
59 | Setting the default value also goes through the alist of buffers | |
60 | and stores into each buffer that does not say it has a local value. */ | |
61 | ||
6b61353c | 62 | DECL_ALIGN (struct buffer, buffer_defaults); |
1ab256cb RM |
63 | |
64 | /* A Lisp_Object pointer to the above, used for staticpro */ | |
65 | ||
66 | static Lisp_Object Vbuffer_defaults; | |
67 | ||
68 | /* This structure marks which slots in a buffer have corresponding | |
69 | default values in buffer_defaults. | |
70 | Each such slot has a nonzero value in this structure. | |
71 | The value has only one nonzero bit. | |
72 | ||
73 | When a buffer has its own local value for a slot, | |
7c02e886 GM |
74 | the entry for that slot (found in the same slot in this structure) |
75 | is turned on in the buffer's local_flags array. | |
1ab256cb RM |
76 | |
77 | If a slot in this structure is -1, then even though there may | |
78 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
79 | and the corresponding slot in buffer_defaults is not used. | |
80 | ||
1ab256cb RM |
81 | If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is |
82 | zero, that is a bug */ | |
83 | ||
84 | struct buffer buffer_local_flags; | |
85 | ||
86 | /* This structure holds the names of symbols whose values may be | |
87 | buffer-local. It is indexed and accessed in the same way as the above. */ | |
88 | ||
6b61353c KH |
89 | DECL_ALIGN (struct buffer, buffer_local_symbols); |
90 | ||
1ab256cb RM |
91 | /* A Lisp_Object pointer to the above, used for staticpro */ |
92 | static Lisp_Object Vbuffer_local_symbols; | |
93 | ||
ce5b453a SM |
94 | /* Return the symbol of the per-buffer variable at offset OFFSET in |
95 | the buffer structure. */ | |
96 | ||
97 | #define PER_BUFFER_SYMBOL(OFFSET) \ | |
98 | (*(Lisp_Object *)((OFFSET) + (char *) &buffer_local_symbols)) | |
99 | ||
13de9290 RS |
100 | /* Flags indicating which built-in buffer-local variables |
101 | are permanent locals. */ | |
7313acd0 | 102 | static char buffer_permanent_local_flags[MAX_PER_BUFFER_VARS]; |
7c02e886 GM |
103 | |
104 | /* Number of per-buffer variables used. */ | |
105 | ||
7313acd0 | 106 | int last_per_buffer_idx; |
13de9290 | 107 | |
3709505e | 108 | EXFUN (Fset_buffer, 1); |
f57e2426 J |
109 | void set_buffer_internal (struct buffer *b); |
110 | void set_buffer_internal_1 (struct buffer *b); | |
111 | static void call_overlay_mod_hooks (Lisp_Object list, Lisp_Object overlay, | |
112 | int after, Lisp_Object arg1, | |
113 | Lisp_Object arg2, Lisp_Object arg3); | |
114 | static void swap_out_buffer_local_variables (struct buffer *b); | |
115 | static void reset_buffer_local_variables (struct buffer *b, int permanent_too); | |
1ab256cb RM |
116 | |
117 | /* Alist of all buffer names vs the buffers. */ | |
118 | /* This used to be a variable, but is no longer, | |
119 | to prevent lossage due to user rplac'ing this alist or its elements. */ | |
120 | Lisp_Object Vbuffer_alist; | |
121 | ||
122 | /* Functions to call before and after each text change. */ | |
5f079267 RS |
123 | Lisp_Object Vbefore_change_functions; |
124 | Lisp_Object Vafter_change_functions; | |
1ab256cb | 125 | |
c48f61ef RS |
126 | Lisp_Object Vtransient_mark_mode; |
127 | ||
a96b68f1 RS |
128 | /* t means ignore all read-only text properties. |
129 | A list means ignore such a property if its value is a member of the list. | |
130 | Any non-nil value means ignore buffer-read-only. */ | |
131 | Lisp_Object Vinhibit_read_only; | |
132 | ||
dcdffbf6 RS |
133 | /* List of functions to call that can query about killing a buffer. |
134 | If any of these functions returns nil, we don't kill it. */ | |
135 | Lisp_Object Vkill_buffer_query_functions; | |
5b20caf0 | 136 | Lisp_Object Qkill_buffer_query_functions; |
dcdffbf6 | 137 | |
43ed3b8d CY |
138 | /* Hook run before changing a major mode. */ |
139 | Lisp_Object Vchange_major_mode_hook, Qchange_major_mode_hook; | |
140 | ||
dbc4e1c1 JB |
141 | /* List of functions to call before changing an unmodified buffer. */ |
142 | Lisp_Object Vfirst_change_hook; | |
22378665 | 143 | |
dbc4e1c1 | 144 | Lisp_Object Qfirst_change_hook; |
22378665 RS |
145 | Lisp_Object Qbefore_change_functions; |
146 | Lisp_Object Qafter_change_functions; | |
48265e61 | 147 | Lisp_Object Qucs_set_table_for_input; |
1ab256cb | 148 | |
7775635d KH |
149 | /* If nonzero, all modification hooks are suppressed. */ |
150 | int inhibit_modification_hooks; | |
151 | ||
1ab256cb | 152 | Lisp_Object Qfundamental_mode, Qmode_class, Qpermanent_local; |
2f7a359d | 153 | Lisp_Object Qpermanent_local_hook; |
1ab256cb RM |
154 | |
155 | Lisp_Object Qprotected_field; | |
156 | ||
157 | Lisp_Object QSFundamental; /* A string "Fundamental" */ | |
158 | ||
159 | Lisp_Object Qkill_buffer_hook; | |
160 | ||
5fe0b67e RS |
161 | Lisp_Object Qget_file_buffer; |
162 | ||
52f8ec73 JB |
163 | Lisp_Object Qoverlayp; |
164 | ||
2c09a58f | 165 | Lisp_Object Qpriority, Qevaporate, Qbefore_string, Qafter_string; |
5985d248 | 166 | |
294d215f RS |
167 | Lisp_Object Qmodification_hooks; |
168 | Lisp_Object Qinsert_in_front_hooks; | |
169 | Lisp_Object Qinsert_behind_hooks; | |
170 | ||
f57e2426 J |
171 | static void alloc_buffer_text (struct buffer *, size_t); |
172 | static void free_buffer_text (struct buffer *b); | |
173 | static struct Lisp_Overlay * copy_overlays (struct buffer *, struct Lisp_Overlay *); | |
174 | static void modify_overlay (struct buffer *, EMACS_INT, EMACS_INT); | |
175 | static Lisp_Object buffer_lisp_local_variables (struct buffer *); | |
b86af064 | 176 | |
1ab256cb RM |
177 | /* For debugging; temporary. See set_buffer_internal. */ |
178 | /* Lisp_Object Qlisp_mode, Vcheck_symbol; */ | |
179 | ||
01136e9b | 180 | void |
d3da34e0 | 181 | nsberror (Lisp_Object spec) |
1ab256cb | 182 | { |
a7a60ce9 | 183 | if (STRINGP (spec)) |
d5db4077 | 184 | error ("No buffer named %s", SDATA (spec)); |
1ab256cb RM |
185 | error ("Invalid buffer argument"); |
186 | } | |
187 | \f | |
0dc88e60 | 188 | DEFUN ("buffer-live-p", Fbuffer_live_p, Sbuffer_live_p, 1, 1, 0, |
7ee72033 MB |
189 | doc: /* Return non-nil if OBJECT is a buffer which has not been killed. |
190 | Value is nil if OBJECT is not a buffer or if it has been killed. */) | |
5842a27b | 191 | (Lisp_Object object) |
0dc88e60 RS |
192 | { |
193 | return ((BUFFERP (object) && ! NILP (XBUFFER (object)->name)) | |
194 | ? Qt : Qnil); | |
195 | } | |
196 | ||
08460cd4 | 197 | DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 1, 0, |
7ee72033 | 198 | doc: /* Return a list of all existing live buffers. |
aef466d5 RS |
199 | If the optional arg FRAME is a frame, we return the buffer list |
200 | in the proper order for that frame: the buffers in FRAME's `buffer-list' | |
201 | frame parameter come first, followed by the rest of the buffers. */) | |
5842a27b | 202 | (Lisp_Object frame) |
1ab256cb | 203 | { |
a18b8cb5 | 204 | Lisp_Object general; |
08460cd4 RS |
205 | general = Fmapcar (Qcdr, Vbuffer_alist); |
206 | ||
207 | if (FRAMEP (frame)) | |
208 | { | |
a18b8cb5 KL |
209 | Lisp_Object framelist, prevlist, tail; |
210 | Lisp_Object args[3]; | |
08460cd4 | 211 | |
b7826503 | 212 | CHECK_FRAME (frame); |
08460cd4 RS |
213 | |
214 | framelist = Fcopy_sequence (XFRAME (frame)->buffer_list); | |
a18b8cb5 | 215 | prevlist = Fnreverse (Fcopy_sequence (XFRAME (frame)->buried_buffer_list)); |
08460cd4 | 216 | |
a18b8cb5 KL |
217 | /* Remove from GENERAL any buffer that duplicates one in |
218 | FRAMELIST or PREVLIST. */ | |
08460cd4 | 219 | tail = framelist; |
a18b8cb5 | 220 | while (CONSP (tail)) |
08460cd4 | 221 | { |
7539e11f KR |
222 | general = Fdelq (XCAR (tail), general); |
223 | tail = XCDR (tail); | |
08460cd4 | 224 | } |
a18b8cb5 KL |
225 | tail = prevlist; |
226 | while (CONSP (tail)) | |
227 | { | |
228 | general = Fdelq (XCAR (tail), general); | |
229 | tail = XCDR (tail); | |
230 | } | |
231 | ||
232 | args[0] = framelist; | |
233 | args[1] = general; | |
234 | args[2] = prevlist; | |
235 | return Fnconc (3, args); | |
08460cd4 RS |
236 | } |
237 | ||
238 | return general; | |
1ab256cb RM |
239 | } |
240 | ||
04ae1b48 RS |
241 | /* Like Fassoc, but use Fstring_equal to compare |
242 | (which ignores text properties), | |
243 | and don't ever QUIT. */ | |
244 | ||
245 | static Lisp_Object | |
d3da34e0 | 246 | assoc_ignore_text_properties (register Lisp_Object key, Lisp_Object list) |
04ae1b48 RS |
247 | { |
248 | register Lisp_Object tail; | |
6d70a280 | 249 | for (tail = list; CONSP (tail); tail = XCDR (tail)) |
04ae1b48 RS |
250 | { |
251 | register Lisp_Object elt, tem; | |
6d70a280 | 252 | elt = XCAR (tail); |
04ae1b48 RS |
253 | tem = Fstring_equal (Fcar (elt), key); |
254 | if (!NILP (tem)) | |
255 | return elt; | |
256 | } | |
257 | return Qnil; | |
258 | } | |
259 | ||
1ab256cb | 260 | DEFUN ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0, |
c8804c4f MR |
261 | doc: /* Return the buffer named BUFFER-OR-NAME. |
262 | BUFFER-OR-NAME must be either a string or a buffer. If BUFFER-OR-NAME | |
263 | is a string and there is no buffer with that name, return nil. If | |
264 | BUFFER-OR-NAME is a buffer, return it as given. */) | |
5842a27b | 265 | (register Lisp_Object buffer_or_name) |
1ab256cb | 266 | { |
c8804c4f MR |
267 | if (BUFFERP (buffer_or_name)) |
268 | return buffer_or_name; | |
269 | CHECK_STRING (buffer_or_name); | |
1ab256cb | 270 | |
c8804c4f | 271 | return Fcdr (assoc_ignore_text_properties (buffer_or_name, Vbuffer_alist)); |
1ab256cb RM |
272 | } |
273 | ||
274 | DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0, | |
7ee72033 | 275 | doc: /* Return the buffer visiting file FILENAME (a string). |
018ba359 PJ |
276 | The buffer's `buffer-file-name' must match exactly the expansion of FILENAME. |
277 | If there is no such live buffer, return nil. | |
7ee72033 | 278 | See also `find-buffer-visiting'. */) |
5842a27b | 279 | (register Lisp_Object filename) |
1ab256cb RM |
280 | { |
281 | register Lisp_Object tail, buf, tem; | |
5fe0b67e RS |
282 | Lisp_Object handler; |
283 | ||
b7826503 | 284 | CHECK_STRING (filename); |
1ab256cb RM |
285 | filename = Fexpand_file_name (filename, Qnil); |
286 | ||
5fe0b67e RS |
287 | /* If the file name has special constructs in it, |
288 | call the corresponding file handler. */ | |
a617e913 | 289 | handler = Ffind_file_name_handler (filename, Qget_file_buffer); |
5fe0b67e RS |
290 | if (!NILP (handler)) |
291 | return call2 (handler, Qget_file_buffer, filename); | |
292 | ||
7539e11f | 293 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 294 | { |
7539e11f | 295 | buf = Fcdr (XCAR (tail)); |
a7a60ce9 KH |
296 | if (!BUFFERP (buf)) continue; |
297 | if (!STRINGP (XBUFFER (buf)->filename)) continue; | |
1ab256cb | 298 | tem = Fstring_equal (XBUFFER (buf)->filename, filename); |
265a9e55 | 299 | if (!NILP (tem)) |
1ab256cb RM |
300 | return buf; |
301 | } | |
302 | return Qnil; | |
303 | } | |
304 | ||
52e01189 | 305 | Lisp_Object |
d3da34e0 | 306 | get_truename_buffer (register Lisp_Object filename) |
52e01189 RS |
307 | { |
308 | register Lisp_Object tail, buf, tem; | |
309 | ||
7539e11f | 310 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
52e01189 | 311 | { |
7539e11f | 312 | buf = Fcdr (XCAR (tail)); |
52e01189 RS |
313 | if (!BUFFERP (buf)) continue; |
314 | if (!STRINGP (XBUFFER (buf)->file_truename)) continue; | |
315 | tem = Fstring_equal (XBUFFER (buf)->file_truename, filename); | |
316 | if (!NILP (tem)) | |
317 | return buf; | |
318 | } | |
319 | return Qnil; | |
320 | } | |
321 | ||
1ab256cb RM |
322 | /* Incremented for each buffer created, to assign the buffer number. */ |
323 | int buffer_count; | |
324 | ||
325 | DEFUN ("get-buffer-create", Fget_buffer_create, Sget_buffer_create, 1, 1, 0, | |
cd265ca6 MR |
326 | doc: /* Return the buffer specified by BUFFER-OR-NAME, creating a new one if needed. |
327 | If BUFFER-OR-NAME is a string and a live buffer with that name exists, | |
328 | return that buffer. If no such buffer exists, create a new buffer with | |
329 | that name and return it. If BUFFER-OR-NAME starts with a space, the new | |
330 | buffer does not keep undo information. | |
331 | ||
332 | If BUFFER-OR-NAME is a buffer instead of a string, return it as given, | |
333 | even if it is dead. The return value is never nil. */) | |
5842a27b | 334 | (register Lisp_Object buffer_or_name) |
1ab256cb | 335 | { |
cd265ca6 | 336 | register Lisp_Object buffer, name; |
1ab256cb RM |
337 | register struct buffer *b; |
338 | ||
cd265ca6 MR |
339 | buffer = Fget_buffer (buffer_or_name); |
340 | if (!NILP (buffer)) | |
341 | return buffer; | |
1ab256cb | 342 | |
cd265ca6 | 343 | if (SCHARS (buffer_or_name) == 0) |
31cd83e9 KH |
344 | error ("Empty string for buffer name is not allowed"); |
345 | ||
cc648cef | 346 | b = allocate_buffer (); |
1ab256cb | 347 | |
336cd056 RS |
348 | /* An ordinary buffer uses its own struct buffer_text. */ |
349 | b->text = &b->own_text; | |
350 | b->base_buffer = 0; | |
351 | ||
1ab256cb | 352 | BUF_GAP_SIZE (b) = 20; |
9ac0d9e0 | 353 | BLOCK_INPUT; |
3b06f880 KH |
354 | /* We allocate extra 1-byte at the tail and keep it always '\0' for |
355 | anchoring a search. */ | |
b86af064 | 356 | alloc_buffer_text (b, BUF_GAP_SIZE (b) + 1); |
9ac0d9e0 | 357 | UNBLOCK_INPUT; |
1ab256cb | 358 | if (! BUF_BEG_ADDR (b)) |
81841847 | 359 | buffer_memory_full (); |
1ab256cb | 360 | |
6d70a280 SM |
361 | BUF_PT (b) = BEG; |
362 | BUF_GPT (b) = BEG; | |
363 | BUF_BEGV (b) = BEG; | |
364 | BUF_ZV (b) = BEG; | |
365 | BUF_Z (b) = BEG; | |
366 | BUF_PT_BYTE (b) = BEG_BYTE; | |
367 | BUF_GPT_BYTE (b) = BEG_BYTE; | |
368 | BUF_BEGV_BYTE (b) = BEG_BYTE; | |
369 | BUF_ZV_BYTE (b) = BEG_BYTE; | |
370 | BUF_Z_BYTE (b) = BEG_BYTE; | |
1ab256cb | 371 | BUF_MODIFF (b) = 1; |
3e145152 | 372 | BUF_CHARS_MODIFF (b) = 1; |
2509d356 | 373 | BUF_OVERLAY_MODIFF (b) = 1; |
336cd056 RS |
374 | BUF_SAVE_MODIFF (b) = 1; |
375 | BUF_INTERVALS (b) = 0; | |
b5a225b4 GM |
376 | BUF_UNCHANGED_MODIFIED (b) = 1; |
377 | BUF_OVERLAY_UNCHANGED_MODIFIED (b) = 1; | |
378 | BUF_END_UNCHANGED (b) = 0; | |
379 | BUF_BEG_UNCHANGED (b) = 0; | |
3b06f880 | 380 | *(BUF_GPT_ADDR (b)) = *(BUF_Z_ADDR (b)) = 0; /* Put an anchor '\0'. */ |
1ab256cb | 381 | |
28e969dd JB |
382 | b->newline_cache = 0; |
383 | b->width_run_cache = 0; | |
384 | b->width_table = Qnil; | |
b5a225b4 | 385 | b->prevent_redisplay_optimizations_p = 1; |
28e969dd | 386 | |
1ab256cb RM |
387 | /* Put this on the chain of all buffers including killed ones. */ |
388 | b->next = all_buffers; | |
389 | all_buffers = b; | |
390 | ||
336cd056 RS |
391 | /* An ordinary buffer normally doesn't need markers |
392 | to handle BEGV and ZV. */ | |
393 | b->pt_marker = Qnil; | |
394 | b->begv_marker = Qnil; | |
395 | b->zv_marker = Qnil; | |
04ae1b48 | 396 | |
cd265ca6 | 397 | name = Fcopy_sequence (buffer_or_name); |
ab77f05c | 398 | STRING_SET_INTERVALS (name, NULL_INTERVAL); |
1ab256cb | 399 | b->name = name; |
04ae1b48 | 400 | |
67ee9f6e | 401 | b->undo_list = (SREF (name, 0) != ' ') ? Qnil : Qt; |
1ab256cb RM |
402 | |
403 | reset_buffer (b); | |
13de9290 | 404 | reset_buffer_local_variables (b, 1); |
1ab256cb | 405 | |
1f57cb74 | 406 | b->mark = Fmake_marker (); |
65745fad | 407 | BUF_MARKERS (b) = NULL; |
1f57cb74 RS |
408 | b->name = name; |
409 | ||
1ab256cb | 410 | /* Put this in the alist of all live buffers. */ |
cd265ca6 MR |
411 | XSETBUFFER (buffer, b); |
412 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buffer), Qnil)); | |
1ab256cb | 413 | |
2f064abf | 414 | /* An error in calling the function here (should someone redefine it) |
d36b182f DL |
415 | can lead to infinite regress until you run out of stack. rms |
416 | says that's not worth protecting against. */ | |
48265e61 | 417 | if (!NILP (Ffboundp (Qucs_set_table_for_input))) |
cd265ca6 MR |
418 | /* buffer is on buffer-alist, so no gcpro. */ |
419 | call1 (Qucs_set_table_for_input, buffer); | |
48265e61 | 420 | |
cd265ca6 | 421 | return buffer; |
336cd056 RS |
422 | } |
423 | ||
7e9d5818 | 424 | |
04e4cb3a GM |
425 | /* Return a list of overlays which is a copy of the overlay list |
426 | LIST, but for buffer B. */ | |
427 | ||
2410d73a | 428 | static struct Lisp_Overlay * |
d3da34e0 | 429 | copy_overlays (struct buffer *b, struct Lisp_Overlay *list) |
04e4cb3a | 430 | { |
2410d73a SM |
431 | Lisp_Object buffer; |
432 | struct Lisp_Overlay *result = NULL, *tail = NULL; | |
04e4cb3a GM |
433 | |
434 | XSETBUFFER (buffer, b); | |
435 | ||
2410d73a | 436 | for (; list; list = list->next) |
04e4cb3a GM |
437 | { |
438 | Lisp_Object overlay, start, end, old_overlay; | |
27c6b98e | 439 | EMACS_INT charpos; |
04e4cb3a | 440 | |
2410d73a | 441 | XSETMISC (old_overlay, list); |
04e4cb3a GM |
442 | charpos = marker_position (OVERLAY_START (old_overlay)); |
443 | start = Fmake_marker (); | |
db3a49a6 | 444 | Fset_marker (start, make_number (charpos), buffer); |
04e4cb3a GM |
445 | XMARKER (start)->insertion_type |
446 | = XMARKER (OVERLAY_START (old_overlay))->insertion_type; | |
447 | ||
448 | charpos = marker_position (OVERLAY_END (old_overlay)); | |
449 | end = Fmake_marker (); | |
db3a49a6 | 450 | Fset_marker (end, make_number (charpos), buffer); |
04e4cb3a GM |
451 | XMARKER (end)->insertion_type |
452 | = XMARKER (OVERLAY_END (old_overlay))->insertion_type; | |
453 | ||
454 | overlay = allocate_misc (); | |
455 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; | |
456 | OVERLAY_START (overlay) = start; | |
457 | OVERLAY_END (overlay) = end; | |
458 | OVERLAY_PLIST (overlay) = Fcopy_sequence (OVERLAY_PLIST (old_overlay)); | |
2410d73a | 459 | XOVERLAY (overlay)->next = NULL; |
177c0ea7 | 460 | |
2410d73a SM |
461 | if (tail) |
462 | tail = tail->next = XOVERLAY (overlay); | |
463 | else | |
464 | result = tail = XOVERLAY (overlay); | |
04e4cb3a GM |
465 | } |
466 | ||
2410d73a | 467 | return result; |
04e4cb3a | 468 | } |
177c0ea7 | 469 | |
04e4cb3a | 470 | |
7e9d5818 GM |
471 | /* Clone per-buffer values of buffer FROM. |
472 | ||
473 | Buffer TO gets the same per-buffer values as FROM, with the | |
474 | following exceptions: (1) TO's name is left untouched, (2) markers | |
475 | are copied and made to refer to TO, and (3) overlay lists are | |
476 | copied. */ | |
477 | ||
478 | static void | |
d3da34e0 | 479 | clone_per_buffer_values (struct buffer *from, struct buffer *to) |
7e9d5818 | 480 | { |
54622f33 | 481 | Lisp_Object to_buffer; |
7e9d5818 GM |
482 | int offset; |
483 | ||
484 | XSETBUFFER (to_buffer, to); | |
177c0ea7 | 485 | |
3ee24aec SM |
486 | /* buffer-local Lisp variables start at `undo_list', |
487 | tho only the ones from `name' on are GC'd normally. */ | |
4b7cdc0e | 488 | for (offset = PER_BUFFER_VAR_OFFSET (undo_list); |
7e9d5818 GM |
489 | offset < sizeof *to; |
490 | offset += sizeof (Lisp_Object)) | |
491 | { | |
492 | Lisp_Object obj; | |
493 | ||
4b7cdc0e SM |
494 | /* Don't touch the `name' which should be unique for every buffer. */ |
495 | if (offset == PER_BUFFER_VAR_OFFSET (name)) | |
496 | continue; | |
497 | ||
7e9d5818 | 498 | obj = PER_BUFFER_VALUE (from, offset); |
ce5b453a | 499 | if (MARKERP (obj) && XMARKER (obj)->buffer == from) |
7e9d5818 GM |
500 | { |
501 | struct Lisp_Marker *m = XMARKER (obj); | |
502 | obj = Fmake_marker (); | |
503 | XMARKER (obj)->insertion_type = m->insertion_type; | |
504 | set_marker_both (obj, to_buffer, m->charpos, m->bytepos); | |
505 | } | |
506 | ||
507 | PER_BUFFER_VALUE (to, offset) = obj; | |
508 | } | |
509 | ||
72af86bd | 510 | memcpy (to->local_flags, from->local_flags, sizeof to->local_flags); |
177c0ea7 | 511 | |
04e4cb3a GM |
512 | to->overlays_before = copy_overlays (to, from->overlays_before); |
513 | to->overlays_after = copy_overlays (to, from->overlays_after); | |
02f28bbd | 514 | |
e1688f54 RS |
515 | /* Get (a copy of) the alist of Lisp-level local variables of FROM |
516 | and install that in TO. */ | |
517 | to->local_var_alist = buffer_lisp_local_variables (from); | |
7e9d5818 GM |
518 | } |
519 | ||
7e9d5818 GM |
520 | DEFUN ("make-indirect-buffer", Fmake_indirect_buffer, Smake_indirect_buffer, |
521 | 2, 3, | |
193c3837 | 522 | "bMake indirect buffer (to buffer): \nBName of indirect buffer: ", |
7ee72033 | 523 | doc: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME. |
6b61353c | 524 | BASE-BUFFER should be a live buffer, or the name of an existing buffer. |
018ba359 PJ |
525 | NAME should be a string which is not the name of an existing buffer. |
526 | Optional argument CLONE non-nil means preserve BASE-BUFFER's state, | |
527 | such as major and minor modes, in the indirect buffer. | |
7ee72033 | 528 | CLONE nil means the indirect buffer's state is reset to default values. */) |
5842a27b | 529 | (Lisp_Object base_buffer, Lisp_Object name, Lisp_Object clone) |
336cd056 | 530 | { |
6b61353c | 531 | Lisp_Object buf, tem; |
7e9d5818 | 532 | struct buffer *b; |
336cd056 | 533 | |
6b61353c | 534 | CHECK_STRING (name); |
336cd056 RS |
535 | buf = Fget_buffer (name); |
536 | if (!NILP (buf)) | |
d5db4077 | 537 | error ("Buffer name `%s' is in use", SDATA (name)); |
336cd056 | 538 | |
6b61353c | 539 | tem = base_buffer; |
336cd056 RS |
540 | base_buffer = Fget_buffer (base_buffer); |
541 | if (NILP (base_buffer)) | |
6b61353c KH |
542 | error ("No such buffer: `%s'", SDATA (tem)); |
543 | if (NILP (XBUFFER (base_buffer)->name)) | |
544 | error ("Base buffer has been killed"); | |
336cd056 | 545 | |
d5db4077 | 546 | if (SCHARS (name) == 0) |
336cd056 RS |
547 | error ("Empty string for buffer name is not allowed"); |
548 | ||
cc648cef | 549 | b = allocate_buffer (); |
336cd056 | 550 | |
67ee9f6e SM |
551 | b->base_buffer = (XBUFFER (base_buffer)->base_buffer |
552 | ? XBUFFER (base_buffer)->base_buffer | |
553 | : XBUFFER (base_buffer)); | |
336cd056 RS |
554 | |
555 | /* Use the base buffer's text object. */ | |
556 | b->text = b->base_buffer->text; | |
557 | ||
558 | BUF_BEGV (b) = BUF_BEGV (b->base_buffer); | |
559 | BUF_ZV (b) = BUF_ZV (b->base_buffer); | |
560 | BUF_PT (b) = BUF_PT (b->base_buffer); | |
3f236a40 RS |
561 | BUF_BEGV_BYTE (b) = BUF_BEGV_BYTE (b->base_buffer); |
562 | BUF_ZV_BYTE (b) = BUF_ZV_BYTE (b->base_buffer); | |
563 | BUF_PT_BYTE (b) = BUF_PT_BYTE (b->base_buffer); | |
336cd056 RS |
564 | |
565 | b->newline_cache = 0; | |
566 | b->width_run_cache = 0; | |
567 | b->width_table = Qnil; | |
568 | ||
569 | /* Put this on the chain of all buffers including killed ones. */ | |
570 | b->next = all_buffers; | |
571 | all_buffers = b; | |
572 | ||
573 | name = Fcopy_sequence (name); | |
ab77f05c | 574 | STRING_SET_INTERVALS (name, NULL_INTERVAL); |
336cd056 RS |
575 | b->name = name; |
576 | ||
577 | reset_buffer (b); | |
13de9290 | 578 | reset_buffer_local_variables (b, 1); |
336cd056 RS |
579 | |
580 | /* Put this in the alist of all live buffers. */ | |
581 | XSETBUFFER (buf, b); | |
582 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); | |
583 | ||
584 | b->mark = Fmake_marker (); | |
1ab256cb | 585 | b->name = name; |
336cd056 | 586 | |
abc9d959 RS |
587 | /* The multibyte status belongs to the base buffer. */ |
588 | b->enable_multibyte_characters = b->base_buffer->enable_multibyte_characters; | |
589 | ||
336cd056 RS |
590 | /* Make sure the base buffer has markers for its narrowing. */ |
591 | if (NILP (b->base_buffer->pt_marker)) | |
592 | { | |
593 | b->base_buffer->pt_marker = Fmake_marker (); | |
3f236a40 RS |
594 | set_marker_both (b->base_buffer->pt_marker, base_buffer, |
595 | BUF_PT (b->base_buffer), | |
596 | BUF_PT_BYTE (b->base_buffer)); | |
336cd056 RS |
597 | } |
598 | if (NILP (b->base_buffer->begv_marker)) | |
599 | { | |
600 | b->base_buffer->begv_marker = Fmake_marker (); | |
3f236a40 RS |
601 | set_marker_both (b->base_buffer->begv_marker, base_buffer, |
602 | BUF_BEGV (b->base_buffer), | |
603 | BUF_BEGV_BYTE (b->base_buffer)); | |
336cd056 RS |
604 | } |
605 | if (NILP (b->base_buffer->zv_marker)) | |
606 | { | |
607 | b->base_buffer->zv_marker = Fmake_marker (); | |
3f236a40 RS |
608 | set_marker_both (b->base_buffer->zv_marker, base_buffer, |
609 | BUF_ZV (b->base_buffer), | |
610 | BUF_ZV_BYTE (b->base_buffer)); | |
26d84681 | 611 | XMARKER (b->base_buffer->zv_marker)->insertion_type = 1; |
336cd056 RS |
612 | } |
613 | ||
7e9d5818 GM |
614 | if (NILP (clone)) |
615 | { | |
616 | /* Give the indirect buffer markers for its narrowing. */ | |
617 | b->pt_marker = Fmake_marker (); | |
618 | set_marker_both (b->pt_marker, buf, BUF_PT (b), BUF_PT_BYTE (b)); | |
619 | b->begv_marker = Fmake_marker (); | |
620 | set_marker_both (b->begv_marker, buf, BUF_BEGV (b), BUF_BEGV_BYTE (b)); | |
621 | b->zv_marker = Fmake_marker (); | |
622 | set_marker_both (b->zv_marker, buf, BUF_ZV (b), BUF_ZV_BYTE (b)); | |
623 | XMARKER (b->zv_marker)->insertion_type = 1; | |
624 | } | |
625 | else | |
7fa57e45 RS |
626 | { |
627 | struct buffer *old_b = current_buffer; | |
628 | ||
629 | clone_per_buffer_values (b->base_buffer, b); | |
630 | b->filename = Qnil; | |
631 | b->file_truename = Qnil; | |
632 | b->display_count = make_number (0); | |
633 | b->backed_up = Qnil; | |
634 | b->auto_save_file_name = Qnil; | |
635 | set_buffer_internal_1 (b); | |
636 | Fset (intern ("buffer-save-without-query"), Qnil); | |
637 | Fset (intern ("buffer-file-number"), Qnil); | |
638 | Fset (intern ("buffer-stale-function"), Qnil); | |
639 | set_buffer_internal_1 (old_b); | |
640 | } | |
336cd056 | 641 | |
a9ee7a59 | 642 | return buf; |
1ab256cb RM |
643 | } |
644 | ||
d4f5719a | 645 | void |
d3da34e0 | 646 | delete_all_overlays (struct buffer *b) |
d4f5719a SM |
647 | { |
648 | Lisp_Object overlay; | |
649 | ||
650 | /* `reset_buffer' blindly sets the list of overlays to NULL, so we | |
651 | have to empty the list, otherwise we end up with overlays that | |
652 | think they belong to this buffer while the buffer doesn't know about | |
653 | them any more. */ | |
654 | while (b->overlays_before) | |
655 | { | |
656 | XSETMISC (overlay, b->overlays_before); | |
657 | Fdelete_overlay (overlay); | |
658 | } | |
659 | while (b->overlays_after) | |
660 | { | |
661 | XSETMISC (overlay, b->overlays_after); | |
662 | Fdelete_overlay (overlay); | |
663 | } | |
664 | eassert (b->overlays_before == NULL); | |
665 | eassert (b->overlays_after == NULL); | |
666 | } | |
667 | ||
bcd40520 | 668 | /* Reinitialize everything about a buffer except its name and contents |
6b61353c | 669 | and local variables. |
d4f5719a SM |
670 | If called on an already-initialized buffer, the list of overlays |
671 | should be deleted before calling this function, otherwise we end up | |
672 | with overlays that claim to belong to the buffer but the buffer | |
673 | claims it doesn't belong to it. */ | |
1ab256cb RM |
674 | |
675 | void | |
d3da34e0 | 676 | reset_buffer (register struct buffer *b) |
1ab256cb RM |
677 | { |
678 | b->filename = Qnil; | |
f6ed2e84 | 679 | b->file_truename = Qnil; |
1ab256cb RM |
680 | b->directory = (current_buffer) ? current_buffer->directory : Qnil; |
681 | b->modtime = 0; | |
58b963f7 | 682 | b->modtime_size = -1; |
8d7a4592 | 683 | XSETFASTINT (b->save_length, 0); |
1ab256cb | 684 | b->last_window_start = 1; |
8b264726 | 685 | /* It is more conservative to start out "changed" than "unchanged". */ |
b5a225b4 GM |
686 | b->clip_changed = 0; |
687 | b->prevent_redisplay_optimizations_p = 1; | |
1ab256cb | 688 | b->backed_up = Qnil; |
0b5397c2 | 689 | BUF_AUTOSAVE_MODIFF (b) = 0; |
84f6bcba | 690 | b->auto_save_failure_time = -1; |
1ab256cb RM |
691 | b->auto_save_file_name = Qnil; |
692 | b->read_only = Qnil; | |
2410d73a SM |
693 | b->overlays_before = NULL; |
694 | b->overlays_after = NULL; | |
c2d5b10f | 695 | b->overlay_center = BEG; |
dfda7a7f | 696 | b->mark_active = Qnil; |
943e065b | 697 | b->point_before_scroll = Qnil; |
be9aafdd | 698 | b->file_format = Qnil; |
71ed49fa | 699 | b->auto_save_file_format = Qt; |
0dc6f165 | 700 | b->last_selected_window = Qnil; |
7962a441 | 701 | XSETINT (b->display_count, 0); |
3fd364db | 702 | b->display_time = Qnil; |
1bf08baf | 703 | b->enable_multibyte_characters = buffer_defaults.enable_multibyte_characters; |
bb2ec976 | 704 | b->cursor_type = buffer_defaults.cursor_type; |
a3bbced0 | 705 | b->extra_line_spacing = buffer_defaults.extra_line_spacing; |
0522997d RS |
706 | |
707 | b->display_error_modiff = 0; | |
1ab256cb RM |
708 | } |
709 | ||
bcd40520 RS |
710 | /* Reset buffer B's local variables info. |
711 | Don't use this on a buffer that has already been in use; | |
712 | it does not treat permanent locals consistently. | |
13de9290 RS |
713 | Instead, use Fkill_all_local_variables. |
714 | ||
3709505e | 715 | If PERMANENT_TOO is 1, then we reset permanent |
13de9290 RS |
716 | buffer-local variables. If PERMANENT_TOO is 0, |
717 | we preserve those. */ | |
bcd40520 | 718 | |
13de9290 | 719 | static void |
d3da34e0 | 720 | reset_buffer_local_variables (register struct buffer *b, int permanent_too) |
1ab256cb RM |
721 | { |
722 | register int offset; | |
7c02e886 | 723 | int i; |
1ab256cb RM |
724 | |
725 | /* Reset the major mode to Fundamental, together with all the | |
726 | things that depend on the major mode. | |
727 | default-major-mode is handled at a higher level. | |
728 | We ignore it here. */ | |
729 | b->major_mode = Qfundamental_mode; | |
730 | b->keymap = Qnil; | |
1ab256cb RM |
731 | b->mode_name = QSFundamental; |
732 | b->minor_modes = Qnil; | |
3446af9c RS |
733 | |
734 | /* If the standard case table has been altered and invalidated, | |
735 | fix up its insides first. */ | |
736 | if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[0]) | |
737 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[1]) | |
738 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[2]))) | |
739 | Fset_standard_case_table (Vascii_downcase_table); | |
740 | ||
1ab256cb | 741 | b->downcase_table = Vascii_downcase_table; |
1e9b6335 RS |
742 | b->upcase_table = XCHAR_TABLE (Vascii_downcase_table)->extras[0]; |
743 | b->case_canon_table = XCHAR_TABLE (Vascii_downcase_table)->extras[1]; | |
744 | b->case_eqv_table = XCHAR_TABLE (Vascii_downcase_table)->extras[2]; | |
3cb719bd | 745 | b->invisibility_spec = Qt; |
2e716096 RS |
746 | #ifndef DOS_NT |
747 | b->buffer_file_type = Qnil; | |
748 | #endif | |
3cb719bd | 749 | |
13de9290 | 750 | /* Reset all (or most) per-buffer variables to their defaults. */ |
3709505e SM |
751 | if (permanent_too) |
752 | b->local_var_alist = Qnil; | |
753 | else | |
754 | { | |
2f7a359d | 755 | Lisp_Object tmp, prop, last = Qnil; |
3709505e | 756 | for (tmp = b->local_var_alist; CONSP (tmp); tmp = XCDR (tmp)) |
ce5b453a | 757 | if (!NILP (prop = Fget (XCAR (XCAR (tmp)), Qpermanent_local))) |
2f7a359d RS |
758 | { |
759 | /* If permanent-local, keep it. */ | |
760 | last = tmp; | |
761 | if (EQ (prop, Qpermanent_local_hook)) | |
762 | { | |
763 | /* This is a partially permanent hook variable. | |
764 | Preserve only the elements that want to be preserved. */ | |
765 | Lisp_Object list, newlist; | |
766 | list = XCDR (XCAR (tmp)); | |
767 | if (!CONSP (list)) | |
768 | newlist = list; | |
769 | else | |
770 | for (newlist = Qnil; CONSP (list); list = XCDR (list)) | |
771 | { | |
772 | Lisp_Object elt = XCAR (list); | |
773 | /* Preserve element ELT if it's t, | |
774 | if it is a function with a `permanent-local-hook' property, | |
775 | or if it's not a symbol. */ | |
776 | if (! SYMBOLP (elt) | |
777 | || EQ (elt, Qt) | |
778 | || !NILP (Fget (elt, Qpermanent_local_hook))) | |
779 | newlist = Fcons (elt, newlist); | |
780 | } | |
781 | XSETCDR (XCAR (tmp), Fnreverse (newlist)); | |
782 | } | |
783 | } | |
784 | /* Delete this local variable. */ | |
3709505e SM |
785 | else if (NILP (last)) |
786 | b->local_var_alist = XCDR (tmp); | |
787 | else | |
788 | XSETCDR (last, XCDR (tmp)); | |
789 | } | |
790 | ||
7313acd0 | 791 | for (i = 0; i < last_per_buffer_idx; ++i) |
7c02e886 | 792 | if (permanent_too || buffer_permanent_local_flags[i] == 0) |
7313acd0 | 793 | SET_PER_BUFFER_VALUE_P (b, i, 0); |
1ab256cb RM |
794 | |
795 | /* For each slot that has a default value, | |
796 | copy that into the slot. */ | |
797 | ||
3ee24aec SM |
798 | /* buffer-local Lisp variables start at `undo_list', |
799 | tho only the ones from `name' on are GC'd normally. */ | |
800 | for (offset = PER_BUFFER_VAR_OFFSET (undo_list); | |
7c02e886 GM |
801 | offset < sizeof *b; |
802 | offset += sizeof (Lisp_Object)) | |
aab80822 | 803 | { |
7313acd0 | 804 | int idx = PER_BUFFER_IDX (offset); |
7c02e886 GM |
805 | if ((idx > 0 |
806 | && (permanent_too | |
ce5b453a | 807 | || buffer_permanent_local_flags[idx] == 0))) |
7313acd0 | 808 | PER_BUFFER_VALUE (b, offset) = PER_BUFFER_DEFAULT (offset); |
aab80822 | 809 | } |
1ab256cb RM |
810 | } |
811 | ||
01050cb5 RM |
812 | /* We split this away from generate-new-buffer, because rename-buffer |
813 | and set-visited-file-name ought to be able to use this to really | |
814 | rename the buffer properly. */ | |
815 | ||
816 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, Sgenerate_new_buffer_name, | |
efc7e75f | 817 | 1, 2, 0, |
7ee72033 | 818 | doc: /* Return a string that is the name of no existing buffer based on NAME. |
018ba359 PJ |
819 | If there is no live buffer named NAME, then return NAME. |
820 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER | |
6b61353c | 821 | \(starting at 2) until an unused name is found, and then return that name. |
2f064abf JB |
822 | Optional second argument IGNORE specifies a name that is okay to use (if |
823 | it is in the sequence to be tried) even if a buffer with that name exists. */) | |
5842a27b | 824 | (register Lisp_Object name, Lisp_Object ignore) |
1ab256cb RM |
825 | { |
826 | register Lisp_Object gentemp, tem; | |
827 | int count; | |
828 | char number[10]; | |
829 | ||
b7826503 | 830 | CHECK_STRING (name); |
1ab256cb | 831 | |
6b61353c KH |
832 | tem = Fstring_equal (name, ignore); |
833 | if (!NILP (tem)) | |
834 | return name; | |
1ab256cb | 835 | tem = Fget_buffer (name); |
265a9e55 | 836 | if (NILP (tem)) |
01050cb5 | 837 | return name; |
1ab256cb RM |
838 | |
839 | count = 1; | |
840 | while (1) | |
841 | { | |
842 | sprintf (number, "<%d>", ++count); | |
843 | gentemp = concat2 (name, build_string (number)); | |
638e4fc3 | 844 | tem = Fstring_equal (gentemp, ignore); |
c273e647 RS |
845 | if (!NILP (tem)) |
846 | return gentemp; | |
1ab256cb | 847 | tem = Fget_buffer (gentemp); |
265a9e55 | 848 | if (NILP (tem)) |
01050cb5 | 849 | return gentemp; |
1ab256cb RM |
850 | } |
851 | } | |
852 | ||
853 | \f | |
854 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, | |
7ee72033 | 855 | doc: /* Return the name of BUFFER, as a string. |
35f5c1d2 JB |
856 | BUFFER defaults to the current buffer. |
857 | Return nil if BUFFER has been killed. */) | |
5842a27b | 858 | (register Lisp_Object buffer) |
1ab256cb | 859 | { |
265a9e55 | 860 | if (NILP (buffer)) |
1ab256cb | 861 | return current_buffer->name; |
b7826503 | 862 | CHECK_BUFFER (buffer); |
1ab256cb RM |
863 | return XBUFFER (buffer)->name; |
864 | } | |
865 | ||
866 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, | |
7ee72033 MB |
867 | doc: /* Return name of file BUFFER is visiting, or nil if none. |
868 | No argument or nil as argument means use the current buffer. */) | |
5842a27b | 869 | (register Lisp_Object buffer) |
1ab256cb | 870 | { |
265a9e55 | 871 | if (NILP (buffer)) |
1ab256cb | 872 | return current_buffer->filename; |
b7826503 | 873 | CHECK_BUFFER (buffer); |
1ab256cb RM |
874 | return XBUFFER (buffer)->filename; |
875 | } | |
876 | ||
336cd056 RS |
877 | DEFUN ("buffer-base-buffer", Fbuffer_base_buffer, Sbuffer_base_buffer, |
878 | 0, 1, 0, | |
7ee72033 | 879 | doc: /* Return the base buffer of indirect buffer BUFFER. |
5a72efd4 LT |
880 | If BUFFER is not indirect, return nil. |
881 | BUFFER defaults to the current buffer. */) | |
5842a27b | 882 | (register Lisp_Object buffer) |
336cd056 RS |
883 | { |
884 | struct buffer *base; | |
885 | Lisp_Object base_buffer; | |
886 | ||
887 | if (NILP (buffer)) | |
888 | base = current_buffer->base_buffer; | |
889 | else | |
890 | { | |
b7826503 | 891 | CHECK_BUFFER (buffer); |
336cd056 RS |
892 | base = XBUFFER (buffer)->base_buffer; |
893 | } | |
894 | ||
895 | if (! base) | |
896 | return Qnil; | |
897 | XSETBUFFER (base_buffer, base); | |
898 | return base_buffer; | |
899 | } | |
900 | ||
79aa712d | 901 | DEFUN ("buffer-local-value", Fbuffer_local_value, |
177c0ea7 | 902 | Sbuffer_local_value, 2, 2, 0, |
79aa712d RS |
903 | doc: /* Return the value of VARIABLE in BUFFER. |
904 | If VARIABLE does not have a buffer-local binding in BUFFER, the value | |
5e2ad10b | 905 | is the default binding of the variable. */) |
5842a27b | 906 | (register Lisp_Object variable, register Lisp_Object buffer) |
79aa712d RS |
907 | { |
908 | register struct buffer *buf; | |
909 | register Lisp_Object result; | |
ad97b375 | 910 | struct Lisp_Symbol *sym; |
79aa712d | 911 | |
5e2ad10b | 912 | CHECK_SYMBOL (variable); |
ae69175b | 913 | CHECK_BUFFER (buffer); |
79aa712d | 914 | buf = XBUFFER (buffer); |
ce5b453a | 915 | sym = XSYMBOL (variable); |
79aa712d | 916 | |
ce5b453a SM |
917 | start: |
918 | switch (sym->redirect) | |
f0bac7de | 919 | { |
ce5b453a SM |
920 | case SYMBOL_VARALIAS: sym = indirect_variable (sym); goto start; |
921 | case SYMBOL_PLAINVAL: result = SYMBOL_VAL (sym); break; | |
922 | case SYMBOL_LOCALIZED: | |
923 | { /* Look in local_var_alist. */ | |
924 | struct Lisp_Buffer_Local_Value *blv = SYMBOL_BLV (sym); | |
925 | XSETSYMBOL (variable, sym); /* Update In case of aliasing. */ | |
926 | result = Fassoc (variable, buf->local_var_alist); | |
927 | if (!NILP (result)) | |
928 | { | |
929 | if (blv->fwd) | |
930 | { /* What binding is loaded right now? */ | |
931 | Lisp_Object current_alist_element = blv->valcell; | |
f0bac7de | 932 | |
ce5b453a SM |
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. */ | |
f0bac7de | 937 | |
ce5b453a SM |
938 | XSETCDR (current_alist_element, |
939 | do_symval_forwarding (blv->fwd)); | |
940 | } | |
941 | /* Now get the (perhaps updated) value out of the binding. */ | |
942 | result = XCDR (result); | |
943 | } | |
944 | else | |
945 | result = Fdefault_value (variable); | |
946 | break; | |
947 | } | |
948 | case SYMBOL_FORWARDED: | |
949 | { | |
950 | union Lisp_Fwd *fwd = SYMBOL_FWD (sym); | |
951 | if (BUFFER_OBJFWDP (fwd)) | |
952 | result = PER_BUFFER_VALUE (buf, XBUFFER_OBJFWD (fwd)->offset); | |
953 | else | |
954 | result = Fdefault_value (variable); | |
955 | break; | |
956 | } | |
957 | default: abort (); | |
f0bac7de | 958 | } |
79aa712d | 959 | |
4c4dc0b0 KS |
960 | if (!EQ (result, Qunbound)) |
961 | return result; | |
79aa712d | 962 | |
4c4dc0b0 | 963 | xsignal1 (Qvoid_variable, variable); |
79aa712d RS |
964 | } |
965 | ||
e1688f54 | 966 | /* Return an alist of the Lisp-level buffer-local bindings of |
7fa57e45 | 967 | buffer BUF. That is, don't include the variables maintained |
e1688f54 RS |
968 | in special slots in the buffer object. */ |
969 | ||
970 | static Lisp_Object | |
d3da34e0 | 971 | buffer_lisp_local_variables (struct buffer *buf) |
e1688f54 RS |
972 | { |
973 | Lisp_Object result = Qnil; | |
974 | register Lisp_Object tail; | |
975 | for (tail = buf->local_var_alist; CONSP (tail); tail = XCDR (tail)) | |
976 | { | |
977 | Lisp_Object val, elt; | |
978 | ||
979 | elt = XCAR (tail); | |
980 | ||
981 | /* Reference each variable in the alist in buf. | |
982 | If inquiring about the current buffer, this gets the current values, | |
983 | so store them into the alist so the alist is up to date. | |
984 | If inquiring about some other buffer, this swaps out any values | |
985 | for that buffer, making the alist up to date automatically. */ | |
986 | val = find_symbol_value (XCAR (elt)); | |
987 | /* Use the current buffer value only if buf is the current buffer. */ | |
988 | if (buf != current_buffer) | |
989 | val = XCDR (elt); | |
990 | ||
ce5b453a | 991 | result = Fcons (Fcons (XCAR (elt), val), result); |
e1688f54 RS |
992 | } |
993 | ||
994 | return result; | |
995 | } | |
996 | ||
1ab256cb | 997 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, |
efc7e75f | 998 | Sbuffer_local_variables, 0, 1, 0, |
7ee72033 | 999 | doc: /* Return an alist of variables that are buffer-local in BUFFER. |
018ba359 PJ |
1000 | Most elements look like (SYMBOL . VALUE), describing one variable. |
1001 | For a symbol that is locally unbound, just the symbol appears in the value. | |
1002 | Note that storing new VALUEs in these elements doesn't change the variables. | |
7ee72033 | 1003 | No argument or nil as argument means use current buffer as BUFFER. */) |
5842a27b | 1004 | (register Lisp_Object buffer) |
1ab256cb RM |
1005 | { |
1006 | register struct buffer *buf; | |
553defa4 | 1007 | register Lisp_Object result; |
1ab256cb | 1008 | |
265a9e55 | 1009 | if (NILP (buffer)) |
1ab256cb RM |
1010 | buf = current_buffer; |
1011 | else | |
1012 | { | |
b7826503 | 1013 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1014 | buf = XBUFFER (buffer); |
1015 | } | |
1016 | ||
e1688f54 | 1017 | result = buffer_lisp_local_variables (buf); |
1ab256cb | 1018 | |
1ab256cb RM |
1019 | /* Add on all the variables stored in special slots. */ |
1020 | { | |
7c02e886 | 1021 | int offset, idx; |
1ab256cb | 1022 | |
3ee24aec SM |
1023 | /* buffer-local Lisp variables start at `undo_list', |
1024 | tho only the ones from `name' on are GC'd normally. */ | |
1025 | for (offset = PER_BUFFER_VAR_OFFSET (undo_list); | |
1ab256cb | 1026 | offset < sizeof (struct buffer); |
7c02e886 GM |
1027 | /* sizeof EMACS_INT == sizeof Lisp_Object */ |
1028 | offset += (sizeof (EMACS_INT))) | |
1ab256cb | 1029 | { |
7313acd0 GM |
1030 | idx = PER_BUFFER_IDX (offset); |
1031 | if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx)) | |
1032 | && SYMBOLP (PER_BUFFER_SYMBOL (offset))) | |
1033 | result = Fcons (Fcons (PER_BUFFER_SYMBOL (offset), | |
1034 | PER_BUFFER_VALUE (buf, offset)), | |
7c02e886 | 1035 | result); |
1ab256cb RM |
1036 | } |
1037 | } | |
553defa4 RS |
1038 | |
1039 | return result; | |
1ab256cb | 1040 | } |
1ab256cb RM |
1041 | \f |
1042 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, | |
efc7e75f | 1043 | 0, 1, 0, |
7ee72033 MB |
1044 | doc: /* Return t if BUFFER was modified since its file was last read or saved. |
1045 | No argument or nil as argument means use current buffer as BUFFER. */) | |
5842a27b | 1046 | (register Lisp_Object buffer) |
1ab256cb RM |
1047 | { |
1048 | register struct buffer *buf; | |
265a9e55 | 1049 | if (NILP (buffer)) |
1ab256cb RM |
1050 | buf = current_buffer; |
1051 | else | |
1052 | { | |
b7826503 | 1053 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1054 | buf = XBUFFER (buffer); |
1055 | } | |
1056 | ||
336cd056 | 1057 | return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil; |
1ab256cb RM |
1058 | } |
1059 | ||
1060 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, | |
efc7e75f | 1061 | 1, 1, 0, |
7ee72033 MB |
1062 | doc: /* Mark current buffer as modified or unmodified according to FLAG. |
1063 | A non-nil FLAG means mark the buffer modified. */) | |
5842a27b | 1064 | (register Lisp_Object flag) |
1ab256cb RM |
1065 | { |
1066 | register int already; | |
1067 | register Lisp_Object fn; | |
8ec01c70 | 1068 | Lisp_Object buffer, window; |
1ab256cb RM |
1069 | |
1070 | #ifdef CLASH_DETECTION | |
1071 | /* If buffer becoming modified, lock the file. | |
1072 | If buffer becoming unmodified, unlock the file. */ | |
1073 | ||
60f4dd23 | 1074 | fn = current_buffer->file_truename; |
90d456d2 KH |
1075 | /* Test buffer-file-name so that binding it to nil is effective. */ |
1076 | if (!NILP (fn) && ! NILP (current_buffer->filename)) | |
1ab256cb | 1077 | { |
336cd056 | 1078 | already = SAVE_MODIFF < MODIFF; |
265a9e55 | 1079 | if (!already && !NILP (flag)) |
1ab256cb | 1080 | lock_file (fn); |
265a9e55 | 1081 | else if (already && NILP (flag)) |
1ab256cb RM |
1082 | unlock_file (fn); |
1083 | } | |
1084 | #endif /* CLASH_DETECTION */ | |
1085 | ||
0b5397c2 SM |
1086 | /* Here we have a problem. SAVE_MODIFF is used here to encode |
1087 | buffer-modified-p (as SAVE_MODIFF<MODIFF) as well as | |
1088 | recent-auto-save-p (as SAVE_MODIFF<auto_save_modified). So if we | |
1089 | modify SAVE_MODIFF to affect one, we may affect the other | |
1090 | as well. | |
1091 | E.g. if FLAG is nil we need to set SAVE_MODIFF to MODIFF, but | |
1092 | if SAVE_MODIFF<auto_save_modified that means we risk changing | |
1093 | recent-auto-save-p from t to nil. | |
1094 | Vice versa, if FLAG is non-nil and SAVE_MODIFF>=auto_save_modified | |
1095 | we risk changing recent-auto-save-p from nil to t. */ | |
1096 | SAVE_MODIFF = (NILP (flag) | |
1097 | /* FIXME: This unavoidably sets recent-auto-save-p to nil. */ | |
1098 | ? MODIFF | |
1099 | /* Let's try to preserve recent-auto-save-p. */ | |
1100 | : SAVE_MODIFF < MODIFF ? SAVE_MODIFF | |
1101 | /* If SAVE_MODIFF == auto_save_modified == MODIFF, | |
1102 | we can either decrease SAVE_MODIFF and auto_save_modified | |
1103 | or increase MODIFF. */ | |
1104 | : MODIFF++); | |
177c0ea7 | 1105 | |
8ec01c70 GM |
1106 | /* Set update_mode_lines only if buffer is displayed in some window. |
1107 | Packages like jit-lock or lazy-lock preserve a buffer's modified | |
1108 | state by recording/restoring the state around blocks of code. | |
1109 | Setting update_mode_lines makes redisplay consider all windows | |
1110 | (on all frames). Stealth fontification of buffers not displayed | |
1111 | would incur additional redisplay costs if we'd set | |
1112 | update_modes_lines unconditionally. | |
1113 | ||
1114 | Ideally, I think there should be another mechanism for fontifying | |
1115 | buffers without "modifying" buffers, or redisplay should be | |
1116 | smarter about updating the `*' in mode lines. --gerd */ | |
1117 | XSETBUFFER (buffer, current_buffer); | |
1118 | window = Fget_buffer_window (buffer, Qt); | |
1119 | if (WINDOWP (window)) | |
d57b83b3 GM |
1120 | { |
1121 | ++update_mode_lines; | |
1122 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
1123 | } | |
177c0ea7 | 1124 | |
1ab256cb RM |
1125 | return flag; |
1126 | } | |
1127 | ||
a8c21b48 GM |
1128 | DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p, |
1129 | Srestore_buffer_modified_p, 1, 1, 0, | |
42f47086 | 1130 | doc: /* Like `set-buffer-modified-p', with a difference concerning redisplay. |
018ba359 | 1131 | It is not ensured that mode lines will be updated to show the modified |
7ee72033 | 1132 | state of the current buffer. Use with care. */) |
5842a27b | 1133 | (Lisp_Object flag) |
a8c21b48 GM |
1134 | { |
1135 | #ifdef CLASH_DETECTION | |
1136 | Lisp_Object fn; | |
177c0ea7 | 1137 | |
a8c21b48 GM |
1138 | /* If buffer becoming modified, lock the file. |
1139 | If buffer becoming unmodified, unlock the file. */ | |
1140 | ||
1141 | fn = current_buffer->file_truename; | |
1142 | /* Test buffer-file-name so that binding it to nil is effective. */ | |
1143 | if (!NILP (fn) && ! NILP (current_buffer->filename)) | |
1144 | { | |
1145 | int already = SAVE_MODIFF < MODIFF; | |
1146 | if (!already && !NILP (flag)) | |
1147 | lock_file (fn); | |
1148 | else if (already && NILP (flag)) | |
1149 | unlock_file (fn); | |
1150 | } | |
1151 | #endif /* CLASH_DETECTION */ | |
177c0ea7 | 1152 | |
a8c21b48 GM |
1153 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
1154 | return flag; | |
1155 | } | |
1156 | ||
1ab256cb | 1157 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, |
efc7e75f | 1158 | 0, 1, 0, |
7ee72033 | 1159 | doc: /* Return BUFFER's tick counter, incremented for each change in text. |
2f064abf JB |
1160 | Each buffer has a tick counter which is incremented each time the |
1161 | text in that buffer is changed. It wraps around occasionally. | |
7ee72033 | 1162 | No argument or nil as argument means use current buffer as BUFFER. */) |
5842a27b | 1163 | (register Lisp_Object buffer) |
1ab256cb RM |
1164 | { |
1165 | register struct buffer *buf; | |
265a9e55 | 1166 | if (NILP (buffer)) |
1ab256cb RM |
1167 | buf = current_buffer; |
1168 | else | |
1169 | { | |
b7826503 | 1170 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1171 | buf = XBUFFER (buffer); |
1172 | } | |
1173 | ||
1174 | return make_number (BUF_MODIFF (buf)); | |
1175 | } | |
3e145152 CY |
1176 | |
1177 | DEFUN ("buffer-chars-modified-tick", Fbuffer_chars_modified_tick, | |
1178 | Sbuffer_chars_modified_tick, 0, 1, 0, | |
1179 | doc: /* Return BUFFER's character-change tick counter. | |
1180 | Each buffer has a character-change tick counter, which is set to the | |
1181 | value of the buffer's tick counter \(see `buffer-modified-tick'), each | |
1182 | time text in that buffer is inserted or deleted. By comparing the | |
12bd42be | 1183 | values returned by two individual calls of `buffer-chars-modified-tick', |
3e145152 CY |
1184 | you can tell whether a character change occurred in that buffer in |
1185 | between these calls. No argument or nil as argument means use current | |
1186 | buffer as BUFFER. */) | |
5842a27b | 1187 | (register Lisp_Object buffer) |
3e145152 CY |
1188 | { |
1189 | register struct buffer *buf; | |
1190 | if (NILP (buffer)) | |
1191 | buf = current_buffer; | |
1192 | else | |
1193 | { | |
1194 | CHECK_BUFFER (buffer); | |
1195 | buf = XBUFFER (buffer); | |
1196 | } | |
1197 | ||
1198 | return make_number (BUF_CHARS_MODIFF (buf)); | |
1199 | } | |
1ab256cb | 1200 | \f |
01050cb5 | 1201 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
c7d97628 JL |
1202 | "(list (read-string \"Rename buffer (to new name): \" \ |
1203 | nil 'buffer-name-history (buffer-name (current-buffer))) \ | |
1204 | current-prefix-arg)", | |
7ee72033 | 1205 | doc: /* Change current buffer's name to NEWNAME (a string). |
018ba359 PJ |
1206 | If second arg UNIQUE is nil or omitted, it is an error if a |
1207 | buffer named NEWNAME already exists. | |
1208 | If UNIQUE is non-nil, come up with a new name using | |
1209 | `generate-new-buffer-name'. | |
1210 | Interactively, you can set UNIQUE with a prefix argument. | |
1211 | We return the name we actually gave the buffer. | |
7ee72033 | 1212 | This does not change the name of the visited file (if any). */) |
5842a27b | 1213 | (register Lisp_Object newname, Lisp_Object unique) |
1ab256cb RM |
1214 | { |
1215 | register Lisp_Object tem, buf; | |
1216 | ||
b7826503 | 1217 | CHECK_STRING (newname); |
d59698c4 | 1218 | |
d5db4077 | 1219 | if (SCHARS (newname) == 0) |
d59698c4 RS |
1220 | error ("Empty string is invalid as a buffer name"); |
1221 | ||
489c043a | 1222 | tem = Fget_buffer (newname); |
265a9e55 | 1223 | if (!NILP (tem)) |
01050cb5 | 1224 | { |
8801a864 KR |
1225 | /* Don't short-circuit if UNIQUE is t. That is a useful way to |
1226 | rename the buffer automatically so you can create another | |
1227 | with the original name. It makes UNIQUE equivalent to | |
1228 | (rename-buffer (generate-new-buffer-name NEWNAME)). */ | |
1229 | if (NILP (unique) && XBUFFER (tem) == current_buffer) | |
1230 | return current_buffer->name; | |
3bd779aa | 1231 | if (!NILP (unique)) |
489c043a | 1232 | newname = Fgenerate_new_buffer_name (newname, current_buffer->name); |
01050cb5 | 1233 | else |
d5db4077 | 1234 | error ("Buffer name `%s' is in use", SDATA (newname)); |
01050cb5 | 1235 | } |
1ab256cb | 1236 | |
489c043a | 1237 | current_buffer->name = newname; |
76f590d7 JB |
1238 | |
1239 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
1240 | any windows displaying current_buffer will stay unchanged. */ | |
1241 | update_mode_lines++; | |
1242 | ||
67180c6a | 1243 | XSETBUFFER (buf, current_buffer); |
489c043a | 1244 | Fsetcar (Frassq (buf, Vbuffer_alist), newname); |
cf058e49 KH |
1245 | if (NILP (current_buffer->filename) |
1246 | && !NILP (current_buffer->auto_save_file_name)) | |
1ab256cb | 1247 | call0 (intern ("rename-auto-save-file")); |
fb5eba9c RS |
1248 | /* Refetch since that last call may have done GC. */ |
1249 | return current_buffer->name; | |
1ab256cb RM |
1250 | } |
1251 | ||
773fbdb9 | 1252 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 3, 0, |
7ee72033 | 1253 | doc: /* Return most recently selected buffer other than BUFFER. |
018ba359 PJ |
1254 | Buffers not visible in windows are preferred to visible buffers, |
1255 | unless optional second argument VISIBLE-OK is non-nil. | |
1256 | If the optional third argument FRAME is non-nil, use that frame's | |
1257 | buffer list instead of the selected frame's buffer list. | |
1258 | If no other buffer exists, the buffer `*scratch*' is returned. | |
7ee72033 | 1259 | If BUFFER is omitted or nil, some interesting buffer is returned. */) |
5842a27b | 1260 | (register Lisp_Object buffer, Lisp_Object visible_ok, Lisp_Object frame) |
1ab256cb | 1261 | { |
d3da34e0 | 1262 | Lisp_Object Fset_buffer_major_mode (Lisp_Object buffer); |
7962a441 | 1263 | register Lisp_Object tail, buf, notsogood, tem, pred, add_ons; |
1ab256cb RM |
1264 | notsogood = Qnil; |
1265 | ||
773fbdb9 | 1266 | if (NILP (frame)) |
9ba9623d | 1267 | frame = selected_frame; |
773fbdb9 | 1268 | |
d234d13e JL |
1269 | CHECK_FRAME (frame); |
1270 | ||
7962a441 | 1271 | tail = Vbuffer_alist; |
773fbdb9 | 1272 | pred = frame_buffer_predicate (frame); |
7962a441 RS |
1273 | |
1274 | /* Consider buffers that have been seen in the selected frame | |
1275 | before other buffers. */ | |
177c0ea7 | 1276 | |
773fbdb9 | 1277 | tem = frame_buffer_list (frame); |
7962a441 RS |
1278 | add_ons = Qnil; |
1279 | while (CONSP (tem)) | |
1280 | { | |
7539e11f KR |
1281 | if (BUFFERP (XCAR (tem))) |
1282 | add_ons = Fcons (Fcons (Qnil, XCAR (tem)), add_ons); | |
1283 | tem = XCDR (tem); | |
7962a441 RS |
1284 | } |
1285 | tail = nconc2 (Fnreverse (add_ons), tail); | |
1286 | ||
6d70a280 | 1287 | for (; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1288 | { |
6d70a280 | 1289 | buf = Fcdr (XCAR (tail)); |
1ab256cb RM |
1290 | if (EQ (buf, buffer)) |
1291 | continue; | |
6b61353c KH |
1292 | if (NILP (buf)) |
1293 | continue; | |
1294 | if (NILP (XBUFFER (buf)->name)) | |
1295 | continue; | |
10ceceb8 | 1296 | if (SREF (XBUFFER (buf)->name, 0) == ' ') |
1ab256cb | 1297 | continue; |
04ae1b48 RS |
1298 | /* If the selected frame has a buffer_predicate, |
1299 | disregard buffers that don't fit the predicate. */ | |
7962a441 | 1300 | if (!NILP (pred)) |
04ae1b48 | 1301 | { |
7962a441 | 1302 | tem = call1 (pred, buf); |
04ae1b48 RS |
1303 | if (NILP (tem)) |
1304 | continue; | |
1305 | } | |
04ae1b48 | 1306 | |
a0ebb746 | 1307 | if (NILP (visible_ok)) |
66ffe51c | 1308 | tem = Fget_buffer_window (buf, Qvisible); |
a0ebb746 JB |
1309 | else |
1310 | tem = Qnil; | |
265a9e55 | 1311 | if (NILP (tem)) |
1ab256cb | 1312 | return buf; |
265a9e55 | 1313 | if (NILP (notsogood)) |
1ab256cb RM |
1314 | notsogood = buf; |
1315 | } | |
265a9e55 | 1316 | if (!NILP (notsogood)) |
1ab256cb | 1317 | return notsogood; |
dba1a30a GM |
1318 | buf = Fget_buffer (build_string ("*scratch*")); |
1319 | if (NILP (buf)) | |
1320 | { | |
1321 | buf = Fget_buffer_create (build_string ("*scratch*")); | |
1322 | Fset_buffer_major_mode (buf); | |
1323 | } | |
89132f25 | 1324 | return buf; |
1ab256cb RM |
1325 | } |
1326 | \f | |
1ab256cb RM |
1327 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, |
1328 | 0, 1, "", | |
7ee72033 MB |
1329 | doc: /* Start keeping undo information for buffer BUFFER. |
1330 | No argument or nil as argument means do this for the current buffer. */) | |
5842a27b | 1331 | (register Lisp_Object buffer) |
1ab256cb | 1332 | { |
ffd56f97 | 1333 | Lisp_Object real_buffer; |
1ab256cb | 1334 | |
ffd56f97 | 1335 | if (NILP (buffer)) |
67180c6a | 1336 | XSETBUFFER (real_buffer, current_buffer); |
1ab256cb RM |
1337 | else |
1338 | { | |
ffd56f97 JB |
1339 | real_buffer = Fget_buffer (buffer); |
1340 | if (NILP (real_buffer)) | |
1341 | nsberror (buffer); | |
1ab256cb RM |
1342 | } |
1343 | ||
ffd56f97 JB |
1344 | if (EQ (XBUFFER (real_buffer)->undo_list, Qt)) |
1345 | XBUFFER (real_buffer)->undo_list = Qnil; | |
1ab256cb RM |
1346 | |
1347 | return Qnil; | |
1348 | } | |
1349 | ||
1350 | /* | |
1351 | DEFVAR_LISP ("kill-buffer-hook", no_cell, "\ | |
1352 | Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\ | |
1353 | The buffer being killed will be current while the hook is running.\n\ | |
1354 | See `kill-buffer'." | |
1355 | */ | |
c8804c4f MR |
1356 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 0, 1, "bKill buffer: ", |
1357 | doc: /* Kill buffer BUFFER-OR-NAME. | |
1358 | The argument may be a buffer or the name of an existing buffer. | |
1359 | Argument nil or omitted means kill the current buffer. Return t if the | |
1360 | buffer is actually killed, nil otherwise. | |
1361 | ||
1362 | This function calls `replace-buffer-in-windows' for cleaning up all | |
1363 | windows currently displaying the buffer to be killed. The functions in | |
1364 | `kill-buffer-query-functions' are called with the buffer to be killed as | |
1365 | the current buffer. If any of them returns nil, the buffer is not | |
1366 | killed. The hook `kill-buffer-hook' is run before the buffer is | |
1367 | actually killed. The buffer being killed will be current while the hook | |
1368 | is running. | |
018ba359 PJ |
1369 | |
1370 | Any processes that have this buffer as the `process-buffer' are killed | |
7ee72033 | 1371 | with SIGHUP. */) |
5842a27b | 1372 | (Lisp_Object buffer_or_name) |
1ab256cb | 1373 | { |
c8804c4f | 1374 | Lisp_Object buffer; |
1ab256cb RM |
1375 | register struct buffer *b; |
1376 | register Lisp_Object tem; | |
1377 | register struct Lisp_Marker *m; | |
6af718a4 | 1378 | struct gcpro gcpro1; |
1ab256cb | 1379 | |
c8804c4f MR |
1380 | if (NILP (buffer_or_name)) |
1381 | buffer = Fcurrent_buffer (); | |
1ab256cb | 1382 | else |
c8804c4f MR |
1383 | buffer = Fget_buffer (buffer_or_name); |
1384 | if (NILP (buffer)) | |
1385 | nsberror (buffer_or_name); | |
1ab256cb | 1386 | |
c8804c4f | 1387 | b = XBUFFER (buffer); |
1ab256cb | 1388 | |
4a4a9db5 KH |
1389 | /* Avoid trouble for buffer already dead. */ |
1390 | if (NILP (b->name)) | |
1391 | return Qnil; | |
1392 | ||
1ab256cb | 1393 | /* Query if the buffer is still modified. */ |
265a9e55 | 1394 | if (INTERACTIVE && !NILP (b->filename) |
336cd056 | 1395 | && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) |
1ab256cb | 1396 | { |
c8804c4f | 1397 | GCPRO1 (buffer); |
5c4930b0 RS |
1398 | tem = do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ", |
1399 | b->name, make_number (0))); | |
1ab256cb | 1400 | UNGCPRO; |
265a9e55 | 1401 | if (NILP (tem)) |
1ab256cb RM |
1402 | return Qnil; |
1403 | } | |
1404 | ||
dcdffbf6 | 1405 | /* Run hooks with the buffer to be killed the current buffer. */ |
1ab256cb | 1406 | { |
aed13378 | 1407 | int count = SPECPDL_INDEX (); |
5b20caf0 | 1408 | Lisp_Object arglist[1]; |
1ab256cb RM |
1409 | |
1410 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1411 | set_buffer_internal (b); | |
dcdffbf6 RS |
1412 | |
1413 | /* First run the query functions; if any query is answered no, | |
1414 | don't kill the buffer. */ | |
5b20caf0 | 1415 | arglist[0] = Qkill_buffer_query_functions; |
09706e1f KR |
1416 | tem = Frun_hook_with_args_until_failure (1, arglist); |
1417 | if (NILP (tem)) | |
5b20caf0 | 1418 | return unbind_to (count, Qnil); |
dcdffbf6 RS |
1419 | |
1420 | /* Then run the hooks. */ | |
f1597a3a | 1421 | Frun_hooks (1, &Qkill_buffer_hook); |
1ab256cb RM |
1422 | unbind_to (count, Qnil); |
1423 | } | |
1424 | ||
1425 | /* We have no more questions to ask. Verify that it is valid | |
1426 | to kill the buffer. This must be done after the questions | |
1427 | since anything can happen within do_yes_or_no_p. */ | |
1428 | ||
1429 | /* Don't kill the minibuffer now current. */ | |
c8804c4f | 1430 | if (EQ (buffer, XWINDOW (minibuf_window)->buffer)) |
1ab256cb RM |
1431 | return Qnil; |
1432 | ||
265a9e55 | 1433 | if (NILP (b->name)) |
1ab256cb RM |
1434 | return Qnil; |
1435 | ||
336cd056 RS |
1436 | /* When we kill a base buffer, kill all its indirect buffers. |
1437 | We do it at this stage so nothing terrible happens if they | |
1438 | ask questions or their hooks get errors. */ | |
1439 | if (! b->base_buffer) | |
1440 | { | |
1441 | struct buffer *other; | |
1442 | ||
c8804c4f | 1443 | GCPRO1 (buffer); |
336cd056 RS |
1444 | |
1445 | for (other = all_buffers; other; other = other->next) | |
4a4a9db5 KH |
1446 | /* all_buffers contains dead buffers too; |
1447 | don't re-kill them. */ | |
1448 | if (other->base_buffer == b && !NILP (other->name)) | |
336cd056 | 1449 | { |
c8804c4f MR |
1450 | Lisp_Object buffer; |
1451 | XSETBUFFER (buffer, other); | |
1452 | Fkill_buffer (buffer); | |
336cd056 RS |
1453 | } |
1454 | ||
1455 | UNGCPRO; | |
1456 | } | |
177c0ea7 | 1457 | |
1ab256cb RM |
1458 | /* Make this buffer not be current. |
1459 | In the process, notice if this is the sole visible buffer | |
1460 | and give up if so. */ | |
1461 | if (b == current_buffer) | |
1462 | { | |
c8804c4f | 1463 | tem = Fother_buffer (buffer, Qnil, Qnil); |
1ab256cb RM |
1464 | Fset_buffer (tem); |
1465 | if (b == current_buffer) | |
1466 | return Qnil; | |
1467 | } | |
1468 | ||
77270fac GM |
1469 | /* Notice if the buffer to kill is the sole visible buffer |
1470 | when we're currently in the mini-buffer, and give up if so. */ | |
1471 | XSETBUFFER (tem, current_buffer); | |
1472 | if (EQ (tem, XWINDOW (minibuf_window)->buffer)) | |
1473 | { | |
c8804c4f MR |
1474 | tem = Fother_buffer (buffer, Qnil, Qnil); |
1475 | if (EQ (buffer, tem)) | |
77270fac GM |
1476 | return Qnil; |
1477 | } | |
1478 | ||
1ab256cb RM |
1479 | /* Now there is no question: we can kill the buffer. */ |
1480 | ||
1481 | #ifdef CLASH_DETECTION | |
1482 | /* Unlock this buffer's file, if it is locked. */ | |
1483 | unlock_buffer (b); | |
1484 | #endif /* CLASH_DETECTION */ | |
1485 | ||
c8804c4f MR |
1486 | GCPRO1 (buffer); |
1487 | kill_buffer_processes (buffer); | |
49da74e6 KS |
1488 | UNGCPRO; |
1489 | ||
1490 | /* Killing buffer processes may run sentinels which may | |
1491 | have called kill-buffer. */ | |
1492 | ||
1493 | if (NILP (b->name)) | |
1494 | return Qnil; | |
1495 | ||
b93fb365 | 1496 | clear_charpos_cache (b); |
1ab256cb RM |
1497 | |
1498 | tem = Vinhibit_quit; | |
1499 | Vinhibit_quit = Qt; | |
c8804c4f MR |
1500 | replace_buffer_in_all_windows (buffer); |
1501 | Vbuffer_alist = Fdelq (Frassq (buffer, Vbuffer_alist), Vbuffer_alist); | |
1502 | frames_discard_buffer (buffer); | |
1ab256cb RM |
1503 | Vinhibit_quit = tem; |
1504 | ||
9cf712eb RS |
1505 | /* Delete any auto-save file, if we saved it in this session. |
1506 | But not if the buffer is modified. */ | |
a7a60ce9 | 1507 | if (STRINGP (b->auto_save_file_name) |
0b5397c2 SM |
1508 | && BUF_AUTOSAVE_MODIFF (b) != 0 |
1509 | && BUF_SAVE_MODIFF (b) < BUF_AUTOSAVE_MODIFF (b) | |
6b61353c KH |
1510 | && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b) |
1511 | && NILP (Fsymbol_value (intern ("auto-save-visited-file-name")))) | |
1ab256cb RM |
1512 | { |
1513 | Lisp_Object tem; | |
1514 | tem = Fsymbol_value (intern ("delete-auto-save-files")); | |
265a9e55 | 1515 | if (! NILP (tem)) |
f1a5d776 | 1516 | internal_delete_file (b->auto_save_file_name); |
1ab256cb RM |
1517 | } |
1518 | ||
4a4a9db5 KH |
1519 | if (b->base_buffer) |
1520 | { | |
1521 | /* Unchain all markers that belong to this indirect buffer. | |
1522 | Don't unchain the markers that belong to the base buffer | |
1523 | or its other indirect buffers. */ | |
65745fad | 1524 | for (m = BUF_MARKERS (b); m; ) |
4a4a9db5 | 1525 | { |
65745fad | 1526 | struct Lisp_Marker *next = m->next; |
4a4a9db5 | 1527 | if (m->buffer == b) |
65745fad SM |
1528 | unchain_marker (m); |
1529 | m = next; | |
4a4a9db5 KH |
1530 | } |
1531 | } | |
1532 | else | |
1ab256cb | 1533 | { |
4a4a9db5 | 1534 | /* Unchain all markers of this buffer and its indirect buffers. |
336cd056 | 1535 | and leave them pointing nowhere. */ |
65745fad | 1536 | for (m = BUF_MARKERS (b); m; ) |
336cd056 | 1537 | { |
65745fad | 1538 | struct Lisp_Marker *next = m->next; |
336cd056 | 1539 | m->buffer = 0; |
65745fad SM |
1540 | m->next = NULL; |
1541 | m = next; | |
336cd056 | 1542 | } |
65745fad | 1543 | BUF_MARKERS (b) = NULL; |
336cd056 | 1544 | BUF_INTERVALS (b) = NULL_INTERVAL; |
336cd056 RS |
1545 | |
1546 | /* Perhaps we should explicitly free the interval tree here... */ | |
1547 | } | |
33f7013e | 1548 | |
2f3f993b RS |
1549 | /* Reset the local variables, so that this buffer's local values |
1550 | won't be protected from GC. They would be protected | |
1551 | if they happened to remain encached in their symbols. | |
1552 | This gets rid of them for certain. */ | |
1553 | swap_out_buffer_local_variables (b); | |
13de9290 | 1554 | reset_buffer_local_variables (b, 1); |
2f3f993b | 1555 | |
1ab256cb | 1556 | b->name = Qnil; |
336cd056 | 1557 | |
9ac0d9e0 | 1558 | BLOCK_INPUT; |
336cd056 | 1559 | if (! b->base_buffer) |
b86af064 | 1560 | free_buffer_text (b); |
336cd056 | 1561 | |
28e969dd JB |
1562 | if (b->newline_cache) |
1563 | { | |
1564 | free_region_cache (b->newline_cache); | |
1565 | b->newline_cache = 0; | |
1566 | } | |
1567 | if (b->width_run_cache) | |
1568 | { | |
1569 | free_region_cache (b->width_run_cache); | |
1570 | b->width_run_cache = 0; | |
1571 | } | |
1572 | b->width_table = Qnil; | |
9ac0d9e0 | 1573 | UNBLOCK_INPUT; |
1ab256cb RM |
1574 | b->undo_list = Qnil; |
1575 | ||
1576 | return Qt; | |
1577 | } | |
1578 | \f | |
36a8c287 JB |
1579 | /* Move the assoc for buffer BUF to the front of buffer-alist. Since |
1580 | we do this each time BUF is selected visibly, the more recently | |
1581 | selected buffers are always closer to the front of the list. This | |
1582 | means that other_buffer is more likely to choose a relevant buffer. */ | |
1ab256cb | 1583 | |
01136e9b | 1584 | void |
d3da34e0 | 1585 | record_buffer (Lisp_Object buf) |
1ab256cb RM |
1586 | { |
1587 | register Lisp_Object link, prev; | |
773fbdb9 | 1588 | Lisp_Object frame; |
9ba9623d | 1589 | frame = selected_frame; |
1ab256cb RM |
1590 | |
1591 | prev = Qnil; | |
7539e11f | 1592 | for (link = Vbuffer_alist; CONSP (link); link = XCDR (link)) |
1ab256cb | 1593 | { |
7539e11f | 1594 | if (EQ (XCDR (XCAR (link)), buf)) |
1ab256cb RM |
1595 | break; |
1596 | prev = link; | |
1597 | } | |
1598 | ||
36a8c287 JB |
1599 | /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist); |
1600 | we cannot use Fdelq itself here because it allows quitting. */ | |
1ab256cb | 1601 | |
265a9e55 | 1602 | if (NILP (prev)) |
7539e11f | 1603 | Vbuffer_alist = XCDR (Vbuffer_alist); |
1ab256cb | 1604 | else |
f3fbd155 | 1605 | XSETCDR (prev, XCDR (XCDR (prev))); |
177c0ea7 | 1606 | |
f3fbd155 | 1607 | XSETCDR (link, Vbuffer_alist); |
1ab256cb | 1608 | Vbuffer_alist = link; |
7962a441 | 1609 | |
a18b8cb5 | 1610 | /* Effectively do a delq on buried_buffer_list. */ |
7723e095 | 1611 | |
a18b8cb5 KL |
1612 | prev = Qnil; |
1613 | for (link = XFRAME (frame)->buried_buffer_list; CONSP (link); | |
1614 | link = XCDR (link)) | |
1615 | { | |
1616 | if (EQ (XCAR (link), buf)) | |
1617 | { | |
1618 | if (NILP (prev)) | |
1619 | XFRAME (frame)->buried_buffer_list = XCDR (link); | |
1620 | else | |
1621 | XSETCDR (prev, XCDR (XCDR (prev))); | |
1622 | break; | |
1623 | } | |
1624 | prev = link; | |
1625 | } | |
1626 | ||
7962a441 RS |
1627 | /* Now move this buffer to the front of frame_buffer_list also. */ |
1628 | ||
1629 | prev = Qnil; | |
773fbdb9 | 1630 | for (link = frame_buffer_list (frame); CONSP (link); |
7539e11f | 1631 | link = XCDR (link)) |
7962a441 | 1632 | { |
7539e11f | 1633 | if (EQ (XCAR (link), buf)) |
7962a441 RS |
1634 | break; |
1635 | prev = link; | |
1636 | } | |
1637 | ||
1638 | /* Effectively do delq. */ | |
1639 | ||
1640 | if (CONSP (link)) | |
1641 | { | |
1642 | if (NILP (prev)) | |
773fbdb9 | 1643 | set_frame_buffer_list (frame, |
7539e11f | 1644 | XCDR (frame_buffer_list (frame))); |
7962a441 | 1645 | else |
f3fbd155 | 1646 | XSETCDR (prev, XCDR (XCDR (prev))); |
177c0ea7 | 1647 | |
f3fbd155 | 1648 | XSETCDR (link, frame_buffer_list (frame)); |
773fbdb9 | 1649 | set_frame_buffer_list (frame, link); |
7962a441 RS |
1650 | } |
1651 | else | |
773fbdb9 | 1652 | set_frame_buffer_list (frame, Fcons (buf, frame_buffer_list (frame))); |
1ab256cb RM |
1653 | } |
1654 | ||
a9ee7a59 | 1655 | DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode, Sset_buffer_major_mode, 1, 1, 0, |
7ee72033 | 1656 | doc: /* Set an appropriate major mode for BUFFER. |
864b90c9 | 1657 | For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode |
71a0f2c6 | 1658 | according to `default-major-mode'. |
018ba359 | 1659 | Use this function before selecting the buffer, since it may need to inspect |
7ee72033 | 1660 | the current buffer's major mode. */) |
5842a27b | 1661 | (Lisp_Object buffer) |
a9ee7a59 KH |
1662 | { |
1663 | int count; | |
1664 | Lisp_Object function; | |
1665 | ||
ea4fddd8 JB |
1666 | CHECK_BUFFER (buffer); |
1667 | ||
71a0f2c6 | 1668 | if (STRINGP (XBUFFER (buffer)->name) |
d5db4077 | 1669 | && strcmp (SDATA (XBUFFER (buffer)->name), "*scratch*") == 0) |
71a0f2c6 GM |
1670 | function = find_symbol_value (intern ("initial-major-mode")); |
1671 | else | |
1672 | { | |
1673 | function = buffer_defaults.major_mode; | |
1674 | if (NILP (function) | |
1675 | && NILP (Fget (current_buffer->major_mode, Qmode_class))) | |
1676 | function = current_buffer->major_mode; | |
1677 | } | |
177c0ea7 | 1678 | |
48265e61 DL |
1679 | if (NILP (function) || EQ (function, Qfundamental_mode)) |
1680 | return Qnil; | |
1681 | ||
aed13378 | 1682 | count = SPECPDL_INDEX (); |
a9ee7a59 | 1683 | |
48265e61 DL |
1684 | /* To select a nonfundamental mode, |
1685 | select the buffer temporarily and then call the mode function. */ | |
a9ee7a59 KH |
1686 | |
1687 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1688 | ||
a2428fa2 | 1689 | Fset_buffer (buffer); |
48265e61 | 1690 | call0 (function); |
a9ee7a59 KH |
1691 | |
1692 | return unbind_to (count, Qnil); | |
1693 | } | |
1694 | ||
2594e0fd RS |
1695 | /* Switch to buffer BUFFER in the selected window. |
1696 | If NORECORD is non-nil, don't call record_buffer. */ | |
1697 | ||
1698 | Lisp_Object | |
d3da34e0 | 1699 | switch_to_buffer_1 (Lisp_Object buffer_or_name, Lisp_Object norecord) |
2594e0fd | 1700 | { |
c8804c4f | 1701 | register Lisp_Object buffer; |
1ab256cb | 1702 | |
c8804c4f MR |
1703 | if (NILP (buffer_or_name)) |
1704 | buffer = Fother_buffer (Fcurrent_buffer (), Qnil, Qnil); | |
1ab256cb | 1705 | else |
a9ee7a59 | 1706 | { |
c8804c4f MR |
1707 | buffer = Fget_buffer (buffer_or_name); |
1708 | if (NILP (buffer)) | |
a9ee7a59 | 1709 | { |
c8804c4f MR |
1710 | buffer = Fget_buffer_create (buffer_or_name); |
1711 | Fset_buffer_major_mode (buffer); | |
a9ee7a59 KH |
1712 | } |
1713 | } | |
c8804c4f | 1714 | Fset_buffer (buffer); |
265a9e55 | 1715 | if (NILP (norecord)) |
c8804c4f | 1716 | record_buffer (buffer); |
1ab256cb RM |
1717 | |
1718 | Fset_window_buffer (EQ (selected_window, minibuf_window) | |
5fcd022d JB |
1719 | ? Fnext_window (minibuf_window, Qnil, Qnil) |
1720 | : selected_window, | |
c8804c4f | 1721 | buffer, Qnil); |
1ab256cb | 1722 | |
c8804c4f | 1723 | return buffer; |
1ab256cb RM |
1724 | } |
1725 | ||
88970542 JL |
1726 | DEFUN ("switch-to-buffer", Fswitch_to_buffer, Sswitch_to_buffer, 1, 2, |
1727 | "(list (read-buffer-to-switch \"Switch to buffer: \"))", | |
ee50ff07 MR |
1728 | doc: /* Make BUFFER-OR-NAME current and display it in selected window. |
1729 | BUFFER-OR-NAME may be a buffer, a string \(a buffer name), or | |
1730 | nil. Return the buffer switched to. | |
a6dced2a | 1731 | |
ee50ff07 MR |
1732 | If BUFFER-OR-NAME is a string and does not identify an existing |
1733 | buffer, create a new buffer with that name. Interactively, if | |
1734 | `confirm-nonexistent-file-or-buffer' is non-nil, request | |
1735 | confirmation before creating a new buffer. If BUFFER-OR-NAME is | |
1736 | nil, switch to buffer returned by `other-buffer'. | |
c8804c4f | 1737 | |
ee50ff07 MR |
1738 | Optional second arg NORECORD non-nil means do not put this buffer |
1739 | at the front of the list of recently selected ones. This | |
1740 | function returns the buffer it switched to as a Lisp object. | |
1741 | ||
1742 | If the selected window is the minibuffer window or dedicated to | |
1743 | its buffer, use `pop-to-buffer' for displaying the buffer. | |
018ba359 PJ |
1744 | |
1745 | WARNING: This is NOT the way to work on another buffer temporarily | |
ee50ff07 MR |
1746 | within a Lisp program! Use `set-buffer' instead. That avoids |
1747 | messing with the window-buffer correspondences. */) | |
5842a27b | 1748 | (Lisp_Object buffer_or_name, Lisp_Object norecord) |
2594e0fd | 1749 | { |
c8804c4f | 1750 | if (EQ (buffer_or_name, Fwindow_buffer (selected_window))) |
fab45703 | 1751 | { |
611ac521 RS |
1752 | /* Basically a NOP. Avoid signalling an error in the case where |
1753 | the selected window is dedicated, or a minibuffer. */ | |
1754 | ||
c8804c4f MR |
1755 | /* But do put this buffer at the front of the buffer list, unless |
1756 | that has been inhibited. Note that even if BUFFER-OR-NAME is | |
1757 | at the front of the main buffer-list already, we still want to | |
1758 | move it to the front of the frame's buffer list. */ | |
611ac521 | 1759 | if (NILP (norecord)) |
c8804c4f MR |
1760 | record_buffer (buffer_or_name); |
1761 | return Fset_buffer (buffer_or_name); | |
fab45703 | 1762 | } |
61313fa3 SM |
1763 | else if (EQ (minibuf_window, selected_window) |
1764 | /* If `dedicated' is neither nil nor t, it means it's | |
1765 | dedicatedness can be overridden by an explicit request | |
1766 | such as a call to switch-to-buffer. */ | |
1767 | || EQ (Fwindow_dedicated_p (selected_window), Qt)) | |
c8804c4f MR |
1768 | /* We can't use the selected window so let `pop-to-buffer' try some |
1769 | other window. */ | |
1770 | return call3 (intern ("pop-to-buffer"), buffer_or_name, Qnil, norecord); | |
1771 | else | |
1772 | return switch_to_buffer_1 (buffer_or_name, norecord); | |
2594e0fd RS |
1773 | } |
1774 | ||
1ab256cb | 1775 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, |
7ee72033 | 1776 | doc: /* Return the current buffer as a Lisp object. */) |
5842a27b | 1777 | (void) |
1ab256cb RM |
1778 | { |
1779 | register Lisp_Object buf; | |
67180c6a | 1780 | XSETBUFFER (buf, current_buffer); |
1ab256cb RM |
1781 | return buf; |
1782 | } | |
1783 | \f | |
7ec44ec6 GM |
1784 | /* Set the current buffer to B. |
1785 | ||
1786 | We previously set windows_or_buffers_changed here to invalidate | |
1787 | global unchanged information in beg_unchanged and end_unchanged. | |
1788 | This is no longer necessary because we now compute unchanged | |
1789 | information on a buffer-basis. Every action affecting other | |
1790 | windows than the selected one requires a select_window at some | |
1791 | time, and that increments windows_or_buffers_changed. */ | |
1ab256cb RM |
1792 | |
1793 | void | |
d3da34e0 | 1794 | set_buffer_internal (register struct buffer *b) |
1ab256cb | 1795 | { |
b5a225b4 | 1796 | if (current_buffer != b) |
7ec44ec6 | 1797 | set_buffer_internal_1 (b); |
c7aa5005 KH |
1798 | } |
1799 | ||
1800 | /* Set the current buffer to B, and do not set windows_or_buffers_changed. | |
1801 | This is used by redisplay. */ | |
1802 | ||
1803 | void | |
d3da34e0 | 1804 | set_buffer_internal_1 (register struct buffer *b) |
c7aa5005 KH |
1805 | { |
1806 | register struct buffer *old_buf; | |
ce5b453a | 1807 | register Lisp_Object tail; |
c7aa5005 | 1808 | |
b86af064 | 1809 | #ifdef USE_MMAP_FOR_BUFFERS |
684b01ee | 1810 | if (b->text->beg == NULL) |
b86af064 GM |
1811 | enlarge_buffer_text (b, 0); |
1812 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
177c0ea7 | 1813 | |
c7aa5005 KH |
1814 | if (current_buffer == b) |
1815 | return; | |
1816 | ||
1ab256cb RM |
1817 | old_buf = current_buffer; |
1818 | current_buffer = b; | |
1819 | last_known_column_point = -1; /* invalidate indentation cache */ | |
1820 | ||
336cd056 RS |
1821 | if (old_buf) |
1822 | { | |
1823 | /* Put the undo list back in the base buffer, so that it appears | |
1824 | that an indirect buffer shares the undo list of its base. */ | |
1825 | if (old_buf->base_buffer) | |
1826 | old_buf->base_buffer->undo_list = old_buf->undo_list; | |
1827 | ||
1828 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1829 | when it is not current, update them now. */ | |
1830 | if (! NILP (old_buf->pt_marker)) | |
1831 | { | |
1832 | Lisp_Object obuf; | |
1833 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1834 | set_marker_both (old_buf->pt_marker, obuf, |
1835 | BUF_PT (old_buf), BUF_PT_BYTE (old_buf)); | |
336cd056 RS |
1836 | } |
1837 | if (! NILP (old_buf->begv_marker)) | |
1838 | { | |
1839 | Lisp_Object obuf; | |
1840 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1841 | set_marker_both (old_buf->begv_marker, obuf, |
1842 | BUF_BEGV (old_buf), BUF_BEGV_BYTE (old_buf)); | |
336cd056 RS |
1843 | } |
1844 | if (! NILP (old_buf->zv_marker)) | |
1845 | { | |
1846 | Lisp_Object obuf; | |
1847 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1848 | set_marker_both (old_buf->zv_marker, obuf, |
1849 | BUF_ZV (old_buf), BUF_ZV_BYTE (old_buf)); | |
336cd056 RS |
1850 | } |
1851 | } | |
1852 | ||
1853 | /* Get the undo list from the base buffer, so that it appears | |
1854 | that an indirect buffer shares the undo list of its base. */ | |
1855 | if (b->base_buffer) | |
1856 | b->undo_list = b->base_buffer->undo_list; | |
1857 | ||
1858 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1859 | when it is not current, fetch them now. */ | |
1860 | if (! NILP (b->pt_marker)) | |
3f236a40 RS |
1861 | { |
1862 | BUF_PT (b) = marker_position (b->pt_marker); | |
1863 | BUF_PT_BYTE (b) = marker_byte_position (b->pt_marker); | |
1864 | } | |
336cd056 | 1865 | if (! NILP (b->begv_marker)) |
3f236a40 RS |
1866 | { |
1867 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1868 | BUF_BEGV_BYTE (b) = marker_byte_position (b->begv_marker); | |
1869 | } | |
336cd056 | 1870 | if (! NILP (b->zv_marker)) |
3f236a40 RS |
1871 | { |
1872 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1873 | BUF_ZV_BYTE (b) = marker_byte_position (b->zv_marker); | |
1874 | } | |
336cd056 | 1875 | |
1ab256cb RM |
1876 | /* Look down buffer's list of local Lisp variables |
1877 | to find and update any that forward into C variables. */ | |
1878 | ||
ce5b453a | 1879 | do |
1ab256cb | 1880 | { |
ce5b453a SM |
1881 | for (tail = b->local_var_alist; CONSP (tail); tail = XCDR (tail)) |
1882 | { | |
1883 | Lisp_Object var = XCAR (XCAR (tail)); | |
1884 | struct Lisp_Symbol *sym = XSYMBOL (var); | |
1885 | if (sym->redirect == SYMBOL_LOCALIZED /* Just to be sure. */ | |
1886 | && SYMBOL_BLV (sym)->fwd) | |
1887 | /* Just reference the variable | |
1888 | to cause it to become set for this buffer. */ | |
1889 | Fsymbol_value (var); | |
1890 | } | |
1ab256cb | 1891 | } |
1ab256cb | 1892 | /* Do the same with any others that were local to the previous buffer */ |
ce5b453a | 1893 | while (b != old_buf && (b = old_buf, b)); |
1ab256cb RM |
1894 | } |
1895 | ||
336cd056 | 1896 | /* Switch to buffer B temporarily for redisplay purposes. |
bbbe9545 | 1897 | This avoids certain things that don't need to be done within redisplay. */ |
336cd056 RS |
1898 | |
1899 | void | |
d3da34e0 | 1900 | set_buffer_temp (struct buffer *b) |
336cd056 RS |
1901 | { |
1902 | register struct buffer *old_buf; | |
1903 | ||
1904 | if (current_buffer == b) | |
1905 | return; | |
1906 | ||
1907 | old_buf = current_buffer; | |
1908 | current_buffer = b; | |
1909 | ||
1910 | if (old_buf) | |
1911 | { | |
1912 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1913 | when it is not current, update them now. */ | |
1914 | if (! NILP (old_buf->pt_marker)) | |
1915 | { | |
1916 | Lisp_Object obuf; | |
1917 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1918 | set_marker_both (old_buf->pt_marker, obuf, |
1919 | BUF_PT (old_buf), BUF_PT_BYTE (old_buf)); | |
336cd056 RS |
1920 | } |
1921 | if (! NILP (old_buf->begv_marker)) | |
1922 | { | |
1923 | Lisp_Object obuf; | |
1924 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1925 | set_marker_both (old_buf->begv_marker, obuf, |
1926 | BUF_BEGV (old_buf), BUF_BEGV_BYTE (old_buf)); | |
336cd056 RS |
1927 | } |
1928 | if (! NILP (old_buf->zv_marker)) | |
1929 | { | |
1930 | Lisp_Object obuf; | |
1931 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1932 | set_marker_both (old_buf->zv_marker, obuf, |
1933 | BUF_ZV (old_buf), BUF_ZV_BYTE (old_buf)); | |
336cd056 RS |
1934 | } |
1935 | } | |
1936 | ||
1937 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1938 | when it is not current, fetch them now. */ | |
1939 | if (! NILP (b->pt_marker)) | |
3f236a40 RS |
1940 | { |
1941 | BUF_PT (b) = marker_position (b->pt_marker); | |
1942 | BUF_PT_BYTE (b) = marker_byte_position (b->pt_marker); | |
1943 | } | |
336cd056 | 1944 | if (! NILP (b->begv_marker)) |
3f236a40 RS |
1945 | { |
1946 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1947 | BUF_BEGV_BYTE (b) = marker_byte_position (b->begv_marker); | |
1948 | } | |
336cd056 | 1949 | if (! NILP (b->zv_marker)) |
3f236a40 RS |
1950 | { |
1951 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1952 | BUF_ZV_BYTE (b) = marker_byte_position (b->zv_marker); | |
1953 | } | |
336cd056 RS |
1954 | } |
1955 | ||
1ab256cb | 1956 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, |
c8804c4f MR |
1957 | doc: /* Make buffer BUFFER-OR-NAME current for editing operations. |
1958 | BUFFER-OR-NAME may be a buffer or the name of an existing buffer. See | |
1959 | also `save-excursion' when you want to make a buffer current | |
1960 | temporarily. This function does not display the buffer, so its effect | |
1961 | ends when the current command terminates. Use `switch-to-buffer' or | |
1962 | `pop-to-buffer' to switch buffers permanently. */) | |
5842a27b | 1963 | (register Lisp_Object buffer_or_name) |
1ab256cb | 1964 | { |
c8804c4f MR |
1965 | register Lisp_Object buffer; |
1966 | buffer = Fget_buffer (buffer_or_name); | |
1967 | if (NILP (buffer)) | |
1968 | nsberror (buffer_or_name); | |
1969 | if (NILP (XBUFFER (buffer)->name)) | |
1ab256cb | 1970 | error ("Selecting deleted buffer"); |
c8804c4f MR |
1971 | set_buffer_internal (XBUFFER (buffer)); |
1972 | return buffer; | |
1ab256cb | 1973 | } |
d0628b06 RS |
1974 | |
1975 | /* Set the current buffer to BUFFER provided it is alive. */ | |
1976 | ||
1977 | Lisp_Object | |
d3da34e0 | 1978 | set_buffer_if_live (Lisp_Object buffer) |
d0628b06 RS |
1979 | { |
1980 | if (! NILP (XBUFFER (buffer)->name)) | |
1981 | Fset_buffer (buffer); | |
1982 | return Qnil; | |
1983 | } | |
1ab256cb RM |
1984 | \f |
1985 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, | |
1986 | Sbarf_if_buffer_read_only, 0, 0, 0, | |
7ee72033 | 1987 | doc: /* Signal a `buffer-read-only' error if the current buffer is read-only. */) |
5842a27b | 1988 | (void) |
1ab256cb | 1989 | { |
a96b68f1 RS |
1990 | if (!NILP (current_buffer->read_only) |
1991 | && NILP (Vinhibit_read_only)) | |
4c4dc0b0 | 1992 | xsignal1 (Qbuffer_read_only, Fcurrent_buffer ()); |
1ab256cb RM |
1993 | return Qnil; |
1994 | } | |
1995 | ||
1996 | DEFUN ("bury-buffer", Fbury_buffer, Sbury_buffer, 0, 1, "", | |
c8804c4f | 1997 | doc: /* Put BUFFER-OR-NAME at the end of the list of all buffers. |
018ba359 | 1998 | There it is the least likely candidate for `other-buffer' to return; |
c8804c4f MR |
1999 | thus, the least likely buffer for \\[switch-to-buffer] to select by |
2000 | default. | |
2001 | ||
2002 | The argument may be a buffer name or an actual buffer object. If | |
2003 | BUFFER-OR-NAME is nil or omitted, bury the current buffer and remove it | |
cd265ca6 MR |
2004 | from the selected window if it is displayed there. If the selected |
2005 | window is dedicated to its buffer, delete that window if there are other | |
2006 | windows on the same frame. If the selected window is the only window on | |
2007 | its frame, iconify that frame. */) | |
5842a27b | 2008 | (register Lisp_Object buffer_or_name) |
1ab256cb | 2009 | { |
c8804c4f MR |
2010 | Lisp_Object buffer; |
2011 | ||
b271272a | 2012 | /* Figure out what buffer we're going to bury. */ |
c8804c4f | 2013 | if (NILP (buffer_or_name)) |
a5611885 | 2014 | { |
c58dab63 | 2015 | Lisp_Object tem; |
a2428fa2 | 2016 | XSETBUFFER (buffer, current_buffer); |
0a63b212 | 2017 | |
c58dab63 | 2018 | tem = Fwindow_buffer (selected_window); |
0a63b212 | 2019 | /* If we're burying the current buffer, unshow it. */ |
c58dab63 | 2020 | if (EQ (buffer, tem)) |
a78e0303 PJ |
2021 | { |
2022 | if (NILP (Fwindow_dedicated_p (selected_window))) | |
2023 | Fswitch_to_buffer (Fother_buffer (buffer, Qnil, Qnil), Qnil); | |
2024 | else if (NILP (XWINDOW (selected_window)->parent)) | |
2025 | Ficonify_frame (Fwindow_frame (selected_window)); | |
2026 | else | |
2027 | Fdelete_window (selected_window); | |
2028 | } | |
a5611885 | 2029 | } |
1ab256cb RM |
2030 | else |
2031 | { | |
c8804c4f MR |
2032 | buffer = Fget_buffer (buffer_or_name); |
2033 | if (NILP (buffer)) | |
2034 | nsberror (buffer_or_name); | |
b271272a JB |
2035 | } |
2036 | ||
a1a8b28e GM |
2037 | /* Move buffer to the end of the buffer list. Do nothing if the |
2038 | buffer is killed. */ | |
2039 | if (!NILP (XBUFFER (buffer)->name)) | |
2040 | { | |
2041 | Lisp_Object aelt, link; | |
b271272a | 2042 | |
a1a8b28e GM |
2043 | aelt = Frassq (buffer, Vbuffer_alist); |
2044 | link = Fmemq (aelt, Vbuffer_alist); | |
2045 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); | |
f3fbd155 | 2046 | XSETCDR (link, Qnil); |
a1a8b28e | 2047 | Vbuffer_alist = nconc2 (Vbuffer_alist, link); |
1ab256cb | 2048 | |
a18b8cb5 KL |
2049 | XFRAME (selected_frame)->buffer_list |
2050 | = Fdelq (buffer, XFRAME (selected_frame)->buffer_list); | |
2051 | XFRAME (selected_frame)->buried_buffer_list | |
2052 | = Fcons (buffer, Fdelq (buffer, XFRAME (selected_frame)->buried_buffer_list)); | |
a1a8b28e | 2053 | } |
dec989eb | 2054 | |
1ab256cb RM |
2055 | return Qnil; |
2056 | } | |
2057 | \f | |
c922bc55 | 2058 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
7ee72033 | 2059 | doc: /* Delete the entire contents of the current buffer. |
018ba359 | 2060 | Any narrowing restriction in effect (see `narrow-to-region') is removed, |
7ee72033 | 2061 | so the buffer is truly empty after this. */) |
5842a27b | 2062 | (void) |
1ab256cb RM |
2063 | { |
2064 | Fwiden (); | |
c0d9a0c3 GM |
2065 | |
2066 | del_range (BEG, Z); | |
c280bc6a | 2067 | |
1ab256cb RM |
2068 | current_buffer->last_window_start = 1; |
2069 | /* Prevent warnings, or suspension of auto saving, that would happen | |
2070 | if future size is less than past size. Use of erase-buffer | |
2071 | implies that the future text is not really related to the past text. */ | |
8d7a4592 | 2072 | XSETFASTINT (current_buffer->save_length, 0); |
1ab256cb RM |
2073 | return Qnil; |
2074 | } | |
2075 | ||
01136e9b | 2076 | void |
d3da34e0 | 2077 | validate_region (register Lisp_Object *b, register Lisp_Object *e) |
1ab256cb | 2078 | { |
b7826503 PJ |
2079 | CHECK_NUMBER_COERCE_MARKER (*b); |
2080 | CHECK_NUMBER_COERCE_MARKER (*e); | |
1ab256cb RM |
2081 | |
2082 | if (XINT (*b) > XINT (*e)) | |
2083 | { | |
03192067 KH |
2084 | Lisp_Object tem; |
2085 | tem = *b; *b = *e; *e = tem; | |
1ab256cb RM |
2086 | } |
2087 | ||
2088 | if (!(BEGV <= XINT (*b) && XINT (*b) <= XINT (*e) | |
2089 | && XINT (*e) <= ZV)) | |
2090 | args_out_of_range (*b, *e); | |
2091 | } | |
2092 | \f | |
b05525fa RS |
2093 | /* Advance BYTE_POS up to a character boundary |
2094 | and return the adjusted position. */ | |
2095 | ||
2096 | static int | |
d3da34e0 | 2097 | advance_to_char_boundary (int byte_pos) |
b05525fa | 2098 | { |
f8449323 | 2099 | int c; |
b05525fa | 2100 | |
f8449323 RS |
2101 | if (byte_pos == BEG) |
2102 | /* Beginning of buffer is always a character boundary. */ | |
6d70a280 | 2103 | return BEG; |
f8449323 RS |
2104 | |
2105 | c = FETCH_BYTE (byte_pos); | |
2106 | if (! CHAR_HEAD_P (c)) | |
b05525fa | 2107 | { |
1be6387d | 2108 | /* We should advance BYTE_POS only when C is a constituent of a |
f8449323 | 2109 | multibyte sequence. */ |
a9bcded1 KH |
2110 | int orig_byte_pos = byte_pos; |
2111 | ||
2112 | do | |
2113 | { | |
2114 | byte_pos--; | |
2115 | c = FETCH_BYTE (byte_pos); | |
2116 | } | |
2117 | while (! CHAR_HEAD_P (c) && byte_pos > BEG); | |
f8449323 | 2118 | INC_POS (byte_pos); |
a9bcded1 KH |
2119 | if (byte_pos < orig_byte_pos) |
2120 | byte_pos = orig_byte_pos; | |
f8449323 RS |
2121 | /* If C is a constituent of a multibyte sequence, BYTE_POS was |
2122 | surely advance to the correct character boundary. If C is | |
2123 | not, BYTE_POS was unchanged. */ | |
b05525fa RS |
2124 | } |
2125 | ||
20773569 | 2126 | return byte_pos; |
b05525fa RS |
2127 | } |
2128 | ||
baae5c2d | 2129 | #ifdef REL_ALLOC |
f57e2426 | 2130 | extern void r_alloc_reset_variable (POINTER_TYPE *, POINTER_TYPE *); |
baae5c2d JR |
2131 | #endif /* REL_ALLOC */ |
2132 | ||
13cda5f9 SM |
2133 | DEFUN ("buffer-swap-text", Fbuffer_swap_text, Sbuffer_swap_text, |
2134 | 1, 1, 0, | |
2135 | doc: /* Swap the text between current buffer and BUFFER. */) | |
5842a27b | 2136 | (Lisp_Object buffer) |
13cda5f9 SM |
2137 | { |
2138 | struct buffer *other_buffer; | |
2139 | CHECK_BUFFER (buffer); | |
2140 | other_buffer = XBUFFER (buffer); | |
2141 | ||
dc9cc574 | 2142 | if (NILP (other_buffer->name)) |
409f2919 | 2143 | error ("Cannot swap a dead buffer's text"); |
dc9cc574 | 2144 | |
13cda5f9 SM |
2145 | /* Actually, it probably works just fine. |
2146 | * if (other_buffer == current_buffer) | |
2147 | * error ("Cannot swap a buffer's text with itself"); */ | |
2148 | ||
2149 | /* Actually, this may be workable as well, tho probably only if they're | |
2150 | *both* indirect. */ | |
2151 | if (other_buffer->base_buffer | |
2152 | || current_buffer->base_buffer) | |
2153 | error ("Cannot swap indirect buffers's text"); | |
2154 | ||
2155 | { /* This is probably harder to make work. */ | |
2156 | struct buffer *other; | |
2157 | for (other = all_buffers; other; other = other->next) | |
2158 | if (other->base_buffer == other_buffer | |
2159 | || other->base_buffer == current_buffer) | |
2160 | error ("One of the buffers to swap has indirect buffers"); | |
2161 | } | |
2162 | ||
2163 | #define swapfield(field, type) \ | |
2164 | do { \ | |
2165 | type tmp##field = other_buffer->field; \ | |
2166 | other_buffer->field = current_buffer->field; \ | |
2167 | current_buffer->field = tmp##field; \ | |
2168 | } while (0) | |
2169 | ||
2170 | swapfield (own_text, struct buffer_text); | |
2171 | eassert (current_buffer->text == ¤t_buffer->own_text); | |
2172 | eassert (other_buffer->text == &other_buffer->own_text); | |
baae5c2d | 2173 | #ifdef REL_ALLOC |
40b615d6 JR |
2174 | r_alloc_reset_variable ((POINTER_TYPE **) ¤t_buffer->own_text.beg, |
2175 | (POINTER_TYPE **) &other_buffer->own_text.beg); | |
2176 | r_alloc_reset_variable ((POINTER_TYPE **) &other_buffer->own_text.beg, | |
2177 | (POINTER_TYPE **) ¤t_buffer->own_text.beg); | |
baae5c2d JR |
2178 | #endif /* REL_ALLOC */ |
2179 | ||
13cda5f9 SM |
2180 | swapfield (pt, EMACS_INT); |
2181 | swapfield (pt_byte, EMACS_INT); | |
2182 | swapfield (begv, EMACS_INT); | |
2183 | swapfield (begv_byte, EMACS_INT); | |
2184 | swapfield (zv, EMACS_INT); | |
2185 | swapfield (zv_byte, EMACS_INT); | |
2186 | eassert (!current_buffer->base_buffer); | |
2187 | eassert (!other_buffer->base_buffer); | |
2188 | current_buffer->clip_changed = 1; other_buffer->clip_changed = 1; | |
2189 | swapfield (newline_cache, struct region_cache *); | |
2190 | swapfield (width_run_cache, struct region_cache *); | |
2191 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2192 | other_buffer->prevent_redisplay_optimizations_p = 1; | |
2193 | swapfield (overlays_before, struct Lisp_Overlay *); | |
2194 | swapfield (overlays_after, struct Lisp_Overlay *); | |
2195 | swapfield (overlay_center, EMACS_INT); | |
2196 | swapfield (undo_list, Lisp_Object); | |
2197 | swapfield (mark, Lisp_Object); | |
13cda5f9 | 2198 | swapfield (enable_multibyte_characters, Lisp_Object); |
bc5a45f3 EZ |
2199 | swapfield (bidi_display_reordering, Lisp_Object); |
2200 | swapfield (bidi_paragraph_direction, Lisp_Object); | |
13cda5f9 SM |
2201 | /* FIXME: Not sure what we should do with these *_marker fields. |
2202 | Hopefully they're just nil anyway. */ | |
2203 | swapfield (pt_marker, Lisp_Object); | |
2204 | swapfield (begv_marker, Lisp_Object); | |
2205 | swapfield (zv_marker, Lisp_Object); | |
2206 | current_buffer->point_before_scroll = Qnil; | |
2207 | other_buffer->point_before_scroll = Qnil; | |
2208 | ||
2209 | current_buffer->text->modiff++; other_buffer->text->modiff++; | |
2210 | current_buffer->text->chars_modiff++; other_buffer->text->chars_modiff++; | |
2211 | current_buffer->text->overlay_modiff++; other_buffer->text->overlay_modiff++; | |
2212 | current_buffer->text->beg_unchanged = current_buffer->text->gpt; | |
2213 | current_buffer->text->end_unchanged = current_buffer->text->gpt; | |
b8ff72fa SM |
2214 | other_buffer->text->beg_unchanged = other_buffer->text->gpt; |
2215 | other_buffer->text->end_unchanged = other_buffer->text->gpt; | |
13cda5f9 SM |
2216 | { |
2217 | struct Lisp_Marker *m; | |
2218 | for (m = BUF_MARKERS (current_buffer); m; m = m->next) | |
2219 | if (m->buffer == other_buffer) | |
2220 | m->buffer = current_buffer; | |
b8ff72fa SM |
2221 | else |
2222 | /* Since there's no indirect buffer in sight, markers on | |
2223 | BUF_MARKERS(buf) should either be for `buf' or dead. */ | |
2224 | eassert (!m->buffer); | |
13cda5f9 SM |
2225 | for (m = BUF_MARKERS (other_buffer); m; m = m->next) |
2226 | if (m->buffer == current_buffer) | |
2227 | m->buffer = other_buffer; | |
b8ff72fa SM |
2228 | else |
2229 | /* Since there's no indirect buffer in sight, markers on | |
2230 | BUF_MARKERS(buf) should either be for `buf' or dead. */ | |
2231 | eassert (!m->buffer); | |
13cda5f9 | 2232 | } |
126f1fc1 SM |
2233 | { /* Some of the C code expects that w->buffer == w->pointm->buffer. |
2234 | So since we just swapped the markers between the two buffers, we need | |
2235 | to undo the effect of this swap for window markers. */ | |
2236 | Lisp_Object w = Fselected_window (), ws = Qnil; | |
2237 | Lisp_Object buf1, buf2; | |
2238 | XSETBUFFER (buf1, current_buffer); XSETBUFFER (buf2, other_buffer); | |
2239 | ||
2240 | while (NILP (Fmemq (w, ws))) | |
2241 | { | |
2242 | ws = Fcons (w, ws); | |
2243 | if (MARKERP (XWINDOW (w)->pointm) | |
2244 | && (EQ (XWINDOW (w)->buffer, buf1) | |
2245 | || EQ (XWINDOW (w)->buffer, buf2))) | |
2246 | Fset_marker (XWINDOW (w)->pointm, | |
2247 | make_number (BUF_BEGV (XBUFFER (XWINDOW (w)->buffer))), | |
2248 | XWINDOW (w)->buffer); | |
2249 | w = Fnext_window (w, Qt, Qt); | |
2250 | } | |
2251 | } | |
2252 | ||
13cda5f9 SM |
2253 | if (current_buffer->text->intervals) |
2254 | (eassert (EQ (current_buffer->text->intervals->up.obj, buffer)), | |
2255 | XSETBUFFER (current_buffer->text->intervals->up.obj, current_buffer)); | |
2256 | if (other_buffer->text->intervals) | |
2257 | (eassert (EQ (other_buffer->text->intervals->up.obj, Fcurrent_buffer ())), | |
2258 | XSETBUFFER (other_buffer->text->intervals->up.obj, other_buffer)); | |
2259 | ||
2260 | return Qnil; | |
2261 | } | |
2262 | ||
3ac81adb RS |
2263 | DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte, Sset_buffer_multibyte, |
2264 | 1, 1, 0, | |
7ee72033 | 2265 | doc: /* Set the multibyte flag of the current buffer to FLAG. |
018ba359 PJ |
2266 | If FLAG is t, this makes the buffer a multibyte buffer. |
2267 | If FLAG is nil, this makes the buffer a single-byte buffer. | |
8f924df7 KH |
2268 | In these cases, the buffer contents remain unchanged as a sequence of |
2269 | bytes but the contents viewed as characters do change. | |
2270 | If FLAG is `to', this makes the buffer a multibyte buffer by changing | |
6b61353c KH |
2271 | all eight-bit bytes to eight-bit characters. |
2272 | If the multibyte flag was really changed, undo information of the | |
2273 | current buffer is cleared. */) | |
5842a27b | 2274 | (Lisp_Object flag) |
3ac81adb | 2275 | { |
65745fad | 2276 | struct Lisp_Marker *tail, *markers; |
abc9d959 | 2277 | struct buffer *other; |
458c8af4 | 2278 | int begv, zv; |
8d1203ea | 2279 | int narrowed = (BEG != BEGV || Z != ZV); |
ed00559d | 2280 | int modified_p = !NILP (Fbuffer_modified_p (Qnil)); |
38babc07 KS |
2281 | Lisp_Object old_undo = current_buffer->undo_list; |
2282 | struct gcpro gcpro1; | |
3ac81adb | 2283 | |
6e553d5e RS |
2284 | if (current_buffer->base_buffer) |
2285 | error ("Cannot do `set-buffer-multibyte' on an indirect buffer"); | |
2286 | ||
70e77119 AS |
2287 | /* Do nothing if nothing actually changes. */ |
2288 | if (NILP (flag) == NILP (current_buffer->enable_multibyte_characters)) | |
2289 | return flag; | |
2290 | ||
38babc07 KS |
2291 | GCPRO1 (old_undo); |
2292 | ||
2293 | /* Don't record these buffer changes. We will put a special undo entry | |
2294 | instead. */ | |
2295 | current_buffer->undo_list = Qt; | |
b05525fa | 2296 | |
3ac81adb RS |
2297 | /* If the cached position is for this buffer, clear it out. */ |
2298 | clear_charpos_cache (current_buffer); | |
2299 | ||
458c8af4 KH |
2300 | if (NILP (flag)) |
2301 | begv = BEGV_BYTE, zv = ZV_BYTE; | |
2302 | else | |
2303 | begv = BEGV, zv = ZV; | |
2304 | ||
a9bcded1 KH |
2305 | if (narrowed) |
2306 | Fwiden (); | |
2307 | ||
3ac81adb RS |
2308 | if (NILP (flag)) |
2309 | { | |
a9bcded1 KH |
2310 | int pos, stop; |
2311 | unsigned char *p; | |
2312 | ||
3ac81adb RS |
2313 | /* Do this first, so it can use CHAR_TO_BYTE |
2314 | to calculate the old correspondences. */ | |
2315 | set_intervals_multibyte (0); | |
2316 | ||
2317 | current_buffer->enable_multibyte_characters = Qnil; | |
2318 | ||
2319 | Z = Z_BYTE; | |
2320 | BEGV = BEGV_BYTE; | |
2321 | ZV = ZV_BYTE; | |
2322 | GPT = GPT_BYTE; | |
2323 | TEMP_SET_PT_BOTH (PT_BYTE, PT_BYTE); | |
2324 | ||
60ebfdf3 | 2325 | |
65745fad SM |
2326 | for (tail = BUF_MARKERS (current_buffer); tail; tail = tail->next) |
2327 | tail->charpos = tail->bytepos; | |
a9bcded1 KH |
2328 | |
2329 | /* Convert multibyte form of 8-bit characters to unibyte. */ | |
2330 | pos = BEG; | |
2331 | stop = GPT; | |
2332 | p = BEG_ADDR; | |
2333 | while (1) | |
2334 | { | |
2335 | int c, bytes; | |
2336 | ||
2337 | if (pos == stop) | |
2338 | { | |
2339 | if (pos == Z) | |
2340 | break; | |
2341 | p = GAP_END_ADDR; | |
2342 | stop = Z; | |
2343 | } | |
8f348ed5 KH |
2344 | if (ASCII_BYTE_P (*p)) |
2345 | p++, pos++; | |
2346 | else if (CHAR_BYTE8_HEAD_P (*p)) | |
a9bcded1 | 2347 | { |
62a6e103 | 2348 | c = STRING_CHAR_AND_LENGTH (p, bytes); |
a9bcded1 KH |
2349 | /* Delete all bytes for this 8-bit character but the |
2350 | last one, and change the last one to the charcter | |
2351 | code. */ | |
2352 | bytes--; | |
2353 | del_range_2 (pos, pos, pos + bytes, pos + bytes, 0); | |
2354 | p = GAP_END_ADDR; | |
2355 | *p++ = c; | |
2356 | pos++; | |
2357 | if (begv > pos) | |
2358 | begv -= bytes; | |
2359 | if (zv > pos) | |
2360 | zv -= bytes; | |
2361 | stop = Z; | |
2362 | } | |
8f924df7 | 2363 | else |
8f348ed5 KH |
2364 | { |
2365 | bytes = BYTES_BY_CHAR_HEAD (*p); | |
2366 | p += bytes, pos += bytes; | |
2367 | } | |
a9bcded1 KH |
2368 | } |
2369 | if (narrowed) | |
2370 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
3ac81adb RS |
2371 | } |
2372 | else | |
2373 | { | |
a9bcded1 KH |
2374 | int pt = PT; |
2375 | int pos, stop; | |
8f348ed5 | 2376 | unsigned char *p, *pend; |
a9bcded1 | 2377 | |
673c57d2 | 2378 | /* Be sure not to have a multibyte sequence striding over the GAP. |
8f348ed5 KH |
2379 | Ex: We change this: "...abc\302 _GAP_ \241def..." |
2380 | to: "...abc _GAP_ \302\241def..." */ | |
673c57d2 | 2381 | |
8f924df7 | 2382 | if (EQ (flag, Qt) |
a3a303df | 2383 | && GPT_BYTE > 1 && GPT_BYTE < Z_BYTE |
673c57d2 KH |
2384 | && ! CHAR_HEAD_P (*(GAP_END_ADDR))) |
2385 | { | |
2386 | unsigned char *p = GPT_ADDR - 1; | |
2387 | ||
2388 | while (! CHAR_HEAD_P (*p) && p > BEG_ADDR) p--; | |
409f2919 | 2389 | if (LEADING_CODE_P (*p)) |
673c57d2 KH |
2390 | { |
2391 | int new_gpt = GPT_BYTE - (GPT_ADDR - p); | |
2392 | ||
2393 | move_gap_both (new_gpt, new_gpt); | |
2394 | } | |
2395 | } | |
2396 | ||
a9bcded1 KH |
2397 | /* Make the buffer contents valid as multibyte by converting |
2398 | 8-bit characters to multibyte form. */ | |
2399 | pos = BEG; | |
2400 | stop = GPT; | |
2401 | p = BEG_ADDR; | |
8f348ed5 | 2402 | pend = GPT_ADDR; |
a9bcded1 KH |
2403 | while (1) |
2404 | { | |
2405 | int bytes; | |
2406 | ||
2407 | if (pos == stop) | |
2408 | { | |
2409 | if (pos == Z) | |
2410 | break; | |
2411 | p = GAP_END_ADDR; | |
8f348ed5 | 2412 | pend = Z_ADDR; |
a9bcded1 KH |
2413 | stop = Z; |
2414 | } | |
177c0ea7 | 2415 | |
a3a303df KH |
2416 | if (ASCII_BYTE_P (*p)) |
2417 | p++, pos++; | |
dcfb9bc4 KH |
2418 | else if (EQ (flag, Qt) |
2419 | && ! CHAR_BYTE8_HEAD_P (*p) | |
2420 | && (bytes = MULTIBYTE_LENGTH (p, pend)) > 0) | |
a9bcded1 KH |
2421 | p += bytes, pos += bytes; |
2422 | else | |
2423 | { | |
2424 | unsigned char tmp[MAX_MULTIBYTE_LENGTH]; | |
a3a303df | 2425 | int c; |
a9bcded1 | 2426 | |
8f924df7 | 2427 | c = BYTE8_TO_CHAR (*p); |
8c2fc311 | 2428 | bytes = CHAR_STRING (c, tmp); |
a9bcded1 KH |
2429 | *p = tmp[0]; |
2430 | TEMP_SET_PT_BOTH (pos + 1, pos + 1); | |
2431 | bytes--; | |
2432 | insert_1_both (tmp + 1, bytes, bytes, 1, 0, 0); | |
2433 | /* Now the gap is after the just inserted data. */ | |
2434 | pos = GPT; | |
2435 | p = GAP_END_ADDR; | |
2436 | if (pos <= begv) | |
2437 | begv += bytes; | |
2438 | if (pos <= zv) | |
2439 | zv += bytes; | |
2440 | if (pos <= pt) | |
2441 | pt += bytes; | |
31285a8f | 2442 | pend = Z_ADDR; |
a9bcded1 KH |
2443 | stop = Z; |
2444 | } | |
2445 | } | |
2446 | ||
2447 | if (pt != PT) | |
2448 | TEMP_SET_PT (pt); | |
2449 | ||
2450 | if (narrowed) | |
2451 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
2452 | ||
3ac81adb RS |
2453 | /* Do this first, so that chars_in_text asks the right question. |
2454 | set_intervals_multibyte needs it too. */ | |
2455 | current_buffer->enable_multibyte_characters = Qt; | |
2456 | ||
b05525fa | 2457 | GPT_BYTE = advance_to_char_boundary (GPT_BYTE); |
3ac81adb | 2458 | GPT = chars_in_text (BEG_ADDR, GPT_BYTE - BEG_BYTE) + BEG; |
b05525fa | 2459 | |
673c57d2 | 2460 | Z = chars_in_text (GAP_END_ADDR, Z_BYTE - GPT_BYTE) + GPT; |
b05525fa RS |
2461 | |
2462 | BEGV_BYTE = advance_to_char_boundary (BEGV_BYTE); | |
3ac81adb | 2463 | if (BEGV_BYTE > GPT_BYTE) |
673c57d2 | 2464 | BEGV = chars_in_text (GAP_END_ADDR, BEGV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2465 | else |
2466 | BEGV = chars_in_text (BEG_ADDR, BEGV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2467 | |
2468 | ZV_BYTE = advance_to_char_boundary (ZV_BYTE); | |
3ac81adb | 2469 | if (ZV_BYTE > GPT_BYTE) |
673c57d2 | 2470 | ZV = chars_in_text (GAP_END_ADDR, ZV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2471 | else |
2472 | ZV = chars_in_text (BEG_ADDR, ZV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2473 | |
2474 | { | |
2475 | int pt_byte = advance_to_char_boundary (PT_BYTE); | |
2476 | int pt; | |
2477 | ||
2478 | if (pt_byte > GPT_BYTE) | |
673c57d2 | 2479 | pt = chars_in_text (GAP_END_ADDR, pt_byte - GPT_BYTE) + GPT; |
b05525fa RS |
2480 | else |
2481 | pt = chars_in_text (BEG_ADDR, pt_byte - BEG_BYTE) + BEG; | |
2482 | TEMP_SET_PT_BOTH (pt, pt_byte); | |
2483 | } | |
3ac81adb RS |
2484 | |
2485 | tail = markers = BUF_MARKERS (current_buffer); | |
95fb069b RS |
2486 | |
2487 | /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from | |
2488 | getting confused by the markers that have not yet been updated. | |
2489 | It is also a signal that it should never create a marker. */ | |
65745fad | 2490 | BUF_MARKERS (current_buffer) = NULL; |
3ac81adb | 2491 | |
65745fad | 2492 | for (; tail; tail = tail->next) |
3ac81adb | 2493 | { |
65745fad SM |
2494 | tail->bytepos = advance_to_char_boundary (tail->bytepos); |
2495 | tail->charpos = BYTE_TO_CHAR (tail->bytepos); | |
3ac81adb | 2496 | } |
b69f9797 RS |
2497 | |
2498 | /* Make sure no markers were put on the chain | |
2499 | while the chain value was incorrect. */ | |
65745fad | 2500 | if (BUF_MARKERS (current_buffer)) |
b69f9797 RS |
2501 | abort (); |
2502 | ||
3ac81adb RS |
2503 | BUF_MARKERS (current_buffer) = markers; |
2504 | ||
2505 | /* Do this last, so it can calculate the new correspondences | |
2506 | between chars and bytes. */ | |
2507 | set_intervals_multibyte (1); | |
2508 | } | |
2509 | ||
38babc07 KS |
2510 | if (!EQ (old_undo, Qt)) |
2511 | { | |
2512 | /* Represent all the above changes by a special undo entry. */ | |
8929fd87 KS |
2513 | current_buffer->undo_list = Fcons (list3 (Qapply, |
2514 | intern ("set-buffer-multibyte"), | |
2515 | NILP (flag) ? Qt : Qnil), | |
2516 | old_undo); | |
38babc07 KS |
2517 | } |
2518 | ||
2519 | UNGCPRO; | |
a9bcded1 | 2520 | |
724b203f GM |
2521 | /* Changing the multibyteness of a buffer means that all windows |
2522 | showing that buffer must be updated thoroughly. */ | |
2523 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2524 | ++windows_or_buffers_changed; | |
2525 | ||
abc9d959 RS |
2526 | /* Copy this buffer's new multibyte status |
2527 | into all of its indirect buffers. */ | |
2528 | for (other = all_buffers; other; other = other->next) | |
2529 | if (other->base_buffer == current_buffer && !NILP (other->name)) | |
724b203f GM |
2530 | { |
2531 | other->enable_multibyte_characters | |
2532 | = current_buffer->enable_multibyte_characters; | |
2533 | other->prevent_redisplay_optimizations_p = 1; | |
2534 | } | |
abc9d959 | 2535 | |
ed00559d KH |
2536 | /* Restore the modifiedness of the buffer. */ |
2537 | if (!modified_p && !NILP (Fbuffer_modified_p (Qnil))) | |
2538 | Fset_buffer_modified_p (Qnil); | |
2539 | ||
172f9454 KH |
2540 | /* Update coding systems of this buffer's process (if any). */ |
2541 | { | |
2542 | Lisp_Object process; | |
2543 | ||
2544 | process = Fget_buffer_process (Fcurrent_buffer ()); | |
2545 | if (PROCESSP (process)) | |
2546 | setup_process_coding_systems (process); | |
2547 | } | |
2548 | ||
3ac81adb RS |
2549 | return flag; |
2550 | } | |
2551 | \f | |
1ab256cb | 2552 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, Skill_all_local_variables, |
efc7e75f | 2553 | 0, 0, 0, |
7ee72033 | 2554 | doc: /* Switch to Fundamental mode by killing current buffer's local variables. |
018ba359 PJ |
2555 | Most local variable bindings are eliminated so that the default values |
2556 | become effective once more. Also, the syntax table is set from | |
2557 | `standard-syntax-table', the local keymap is set to nil, | |
2558 | and the abbrev table from `fundamental-mode-abbrev-table'. | |
2559 | This function also forces redisplay of the mode line. | |
2560 | ||
2561 | Every function to select a new major mode starts by | |
2562 | calling this function. | |
2563 | ||
2564 | As a special exception, local variables whose names have | |
2565 | a non-nil `permanent-local' property are not eliminated by this function. | |
2566 | ||
2567 | The first thing this function does is run | |
7ee72033 | 2568 | the normal hook `change-major-mode-hook'. */) |
5842a27b | 2569 | (void) |
1ab256cb | 2570 | { |
fd186f07 | 2571 | if (!NILP (Vrun_hooks)) |
43ed3b8d | 2572 | call1 (Vrun_hooks, Qchange_major_mode_hook); |
1ab256cb | 2573 | |
3709505e | 2574 | /* Make sure none of the bindings in local_var_alist |
2f3f993b | 2575 | remain swapped in, in their symbols. */ |
1ab256cb | 2576 | |
2f3f993b | 2577 | swap_out_buffer_local_variables (current_buffer); |
1ab256cb RM |
2578 | |
2579 | /* Actually eliminate all local bindings of this buffer. */ | |
2580 | ||
13de9290 | 2581 | reset_buffer_local_variables (current_buffer, 0); |
1ab256cb | 2582 | |
1ab256cb RM |
2583 | /* Force mode-line redisplay. Useful here because all major mode |
2584 | commands call this function. */ | |
2585 | update_mode_lines++; | |
2586 | ||
2587 | return Qnil; | |
2588 | } | |
2f3f993b RS |
2589 | |
2590 | /* Make sure no local variables remain set up with buffer B | |
2591 | for their current values. */ | |
2592 | ||
2593 | static void | |
d3da34e0 | 2594 | swap_out_buffer_local_variables (struct buffer *b) |
2f3f993b | 2595 | { |
ce5b453a | 2596 | Lisp_Object oalist, alist, buffer; |
2f3f993b RS |
2597 | |
2598 | XSETBUFFER (buffer, b); | |
2599 | oalist = b->local_var_alist; | |
2600 | ||
67ee9f6e | 2601 | for (alist = oalist; CONSP (alist); alist = XCDR (alist)) |
2f3f993b | 2602 | { |
ce5b453a SM |
2603 | Lisp_Object sym = XCAR (XCAR (alist)); |
2604 | eassert (XSYMBOL (sym)->redirect == SYMBOL_LOCALIZED); | |
2605 | /* Need not do anything if some other buffer's binding is | |
2606 | now encached. */ | |
2607 | if (EQ (SYMBOL_BLV (XSYMBOL (sym))->where, buffer)) | |
2f3f993b | 2608 | { |
e7c10f83 SM |
2609 | /* Symbol is set up for this buffer's old local value: |
2610 | swap it out! */ | |
ce5b453a | 2611 | swap_in_global_binding (XSYMBOL (sym)); |
2f3f993b RS |
2612 | } |
2613 | } | |
2614 | } | |
1ab256cb | 2615 | \f |
2eec3b4e | 2616 | /* Find all the overlays in the current buffer that contain position POS. |
177c0ea7 | 2617 | Return the number found, and store them in a vector in *VEC_PTR. |
2eec3b4e | 2618 | Store in *LEN_PTR the size allocated for the vector. |
52f8ec73 | 2619 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
624d2678 | 2620 | or ZV if there are no more overlays between POS and ZV. |
bbbe9545 | 2621 | Store in *PREV_PTR the previous position before POS where an overlay ends, |
413e06a4 | 2622 | or where an overlay starts which ends at or after POS; |
624d2678 | 2623 | or BEGV if there are no such overlays from BEGV to POS. |
239c932b | 2624 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. |
2eec3b4e RS |
2625 | |
2626 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
2627 | when this function is called. |
2628 | ||
2629 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2630 | If EXTEND is zero, we never extend the vector, | |
2631 | and we store only as many overlays as will fit. | |
ac869cf7 MB |
2632 | But we still return the total number of overlays. |
2633 | ||
2634 | If CHANGE_REQ is true, then any position written into *PREV_PTR or | |
2635 | *NEXT_PTR is guaranteed to be not equal to POS, unless it is the | |
2636 | default (BEGV or ZV). */ | |
2eec3b4e RS |
2637 | |
2638 | int | |
d3da34e0 JB |
2639 | overlays_at (EMACS_INT pos, int extend, Lisp_Object **vec_ptr, int *len_ptr, |
2640 | EMACS_INT *next_ptr, EMACS_INT *prev_ptr, int change_req) | |
1ab256cb | 2641 | { |
2410d73a SM |
2642 | Lisp_Object overlay, start, end; |
2643 | struct Lisp_Overlay *tail; | |
2eec3b4e RS |
2644 | int idx = 0; |
2645 | int len = *len_ptr; | |
2646 | Lisp_Object *vec = *vec_ptr; | |
2647 | int next = ZV; | |
239c932b | 2648 | int prev = BEGV; |
61d54cd5 RS |
2649 | int inhibit_storing = 0; |
2650 | ||
2410d73a | 2651 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
2eec3b4e | 2652 | { |
239c932b | 2653 | int startpos, endpos; |
52f8ec73 | 2654 | |
2410d73a | 2655 | XSETMISC (overlay, tail); |
1ab256cb | 2656 | |
2eec3b4e RS |
2657 | start = OVERLAY_START (overlay); |
2658 | end = OVERLAY_END (overlay); | |
239c932b RS |
2659 | endpos = OVERLAY_POSITION (end); |
2660 | if (endpos < pos) | |
2661 | { | |
2662 | if (prev < endpos) | |
2663 | prev = endpos; | |
2664 | break; | |
2665 | } | |
413e06a4 RS |
2666 | startpos = OVERLAY_POSITION (start); |
2667 | /* This one ends at or after POS | |
daa1c109 | 2668 | so its start counts for PREV_PTR if it's before POS. */ |
413e06a4 RS |
2669 | if (prev < startpos && startpos < pos) |
2670 | prev = startpos; | |
239c932b RS |
2671 | if (endpos == pos) |
2672 | continue; | |
2eec3b4e RS |
2673 | if (startpos <= pos) |
2674 | { | |
2675 | if (idx == len) | |
2676 | { | |
61d54cd5 RS |
2677 | /* The supplied vector is full. |
2678 | Either make it bigger, or don't store any more in it. */ | |
2679 | if (extend) | |
2680 | { | |
0552666b GM |
2681 | /* Make it work with an initial len == 0. */ |
2682 | len *= 2; | |
2683 | if (len == 0) | |
2684 | len = 4; | |
2685 | *len_ptr = len; | |
61d54cd5 RS |
2686 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2687 | *vec_ptr = vec; | |
2688 | } | |
2689 | else | |
2690 | inhibit_storing = 1; | |
2eec3b4e | 2691 | } |
61d54cd5 RS |
2692 | |
2693 | if (!inhibit_storing) | |
2694 | vec[idx] = overlay; | |
2695 | /* Keep counting overlays even if we can't return them all. */ | |
2696 | idx++; | |
2eec3b4e RS |
2697 | } |
2698 | else if (startpos < next) | |
2699 | next = startpos; | |
2700 | } | |
2701 | ||
2410d73a | 2702 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
1ab256cb | 2703 | { |
239c932b | 2704 | int startpos, endpos; |
52f8ec73 | 2705 | |
2410d73a | 2706 | XSETMISC (overlay, tail); |
2eec3b4e RS |
2707 | |
2708 | start = OVERLAY_START (overlay); | |
2709 | end = OVERLAY_END (overlay); | |
2710 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 2711 | if (pos < startpos) |
2eec3b4e RS |
2712 | { |
2713 | if (startpos < next) | |
2714 | next = startpos; | |
2715 | break; | |
2716 | } | |
239c932b RS |
2717 | endpos = OVERLAY_POSITION (end); |
2718 | if (pos < endpos) | |
2eec3b4e RS |
2719 | { |
2720 | if (idx == len) | |
2721 | { | |
61d54cd5 RS |
2722 | if (extend) |
2723 | { | |
4b0e44fc RS |
2724 | /* Make it work with an initial len == 0. */ |
2725 | len *= 2; | |
0552666b | 2726 | if (len == 0) |
4b0e44fc RS |
2727 | len = 4; |
2728 | *len_ptr = len; | |
61d54cd5 RS |
2729 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2730 | *vec_ptr = vec; | |
2731 | } | |
2732 | else | |
2733 | inhibit_storing = 1; | |
2eec3b4e | 2734 | } |
61d54cd5 RS |
2735 | |
2736 | if (!inhibit_storing) | |
2737 | vec[idx] = overlay; | |
2738 | idx++; | |
413e06a4 RS |
2739 | |
2740 | if (startpos < pos && startpos > prev) | |
2741 | prev = startpos; | |
2eec3b4e | 2742 | } |
239c932b RS |
2743 | else if (endpos < pos && endpos > prev) |
2744 | prev = endpos; | |
1d5f4c1d MB |
2745 | else if (endpos == pos && startpos > prev |
2746 | && (!change_req || startpos < pos)) | |
413e06a4 | 2747 | prev = startpos; |
1ab256cb RM |
2748 | } |
2749 | ||
239c932b RS |
2750 | if (next_ptr) |
2751 | *next_ptr = next; | |
2752 | if (prev_ptr) | |
2753 | *prev_ptr = prev; | |
2eec3b4e RS |
2754 | return idx; |
2755 | } | |
74514898 | 2756 | \f |
7723e095 MR |
2757 | /* Find all the overlays in the current buffer that overlap the range |
2758 | BEG-END, or are empty at BEG, or are empty at END provided END | |
2759 | denotes the position at the end of the current buffer. | |
2a3eeee7 | 2760 | |
177c0ea7 | 2761 | Return the number found, and store them in a vector in *VEC_PTR. |
74514898 RS |
2762 | Store in *LEN_PTR the size allocated for the vector. |
2763 | Store in *NEXT_PTR the next position after POS where an overlay starts, | |
2764 | or ZV if there are no more overlays. | |
2765 | Store in *PREV_PTR the previous position before POS where an overlay ends, | |
2766 | or BEGV if there are no previous overlays. | |
2767 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
2768 | ||
2769 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
2770 | when this function is called. | |
2771 | ||
2772 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2773 | If EXTEND is zero, we never extend the vector, | |
2774 | and we store only as many overlays as will fit. | |
2775 | But we still return the total number of overlays. */ | |
2776 | ||
a9b9a780 | 2777 | static int |
d3da34e0 JB |
2778 | overlays_in (int beg, int end, int extend, Lisp_Object **vec_ptr, int *len_ptr, |
2779 | int *next_ptr, int *prev_ptr) | |
74514898 | 2780 | { |
2410d73a SM |
2781 | Lisp_Object overlay, ostart, oend; |
2782 | struct Lisp_Overlay *tail; | |
74514898 RS |
2783 | int idx = 0; |
2784 | int len = *len_ptr; | |
2785 | Lisp_Object *vec = *vec_ptr; | |
2786 | int next = ZV; | |
2787 | int prev = BEGV; | |
2788 | int inhibit_storing = 0; | |
7723e095 | 2789 | int end_is_Z = end == Z; |
74514898 | 2790 | |
2410d73a | 2791 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
74514898 RS |
2792 | { |
2793 | int startpos, endpos; | |
2794 | ||
2410d73a | 2795 | XSETMISC (overlay, tail); |
74514898 RS |
2796 | |
2797 | ostart = OVERLAY_START (overlay); | |
2798 | oend = OVERLAY_END (overlay); | |
2799 | endpos = OVERLAY_POSITION (oend); | |
2800 | if (endpos < beg) | |
2801 | { | |
2802 | if (prev < endpos) | |
2803 | prev = endpos; | |
2804 | break; | |
2805 | } | |
2806 | startpos = OVERLAY_POSITION (ostart); | |
7723e095 MR |
2807 | /* Count an interval if it overlaps the range, is empty at the |
2808 | start of the range, or is empty at END provided END denotes the | |
2809 | end of the buffer. */ | |
74514898 | 2810 | if ((beg < endpos && startpos < end) |
7723e095 MR |
2811 | || (startpos == endpos |
2812 | && (beg == endpos || (end_is_Z && endpos == end)))) | |
74514898 RS |
2813 | { |
2814 | if (idx == len) | |
2815 | { | |
2816 | /* The supplied vector is full. | |
2817 | Either make it bigger, or don't store any more in it. */ | |
2818 | if (extend) | |
2819 | { | |
4b0e44fc RS |
2820 | /* Make it work with an initial len == 0. */ |
2821 | len *= 2; | |
2822 | if (len == 0) | |
2823 | len = 4; | |
2824 | *len_ptr = len; | |
74514898 RS |
2825 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2826 | *vec_ptr = vec; | |
2827 | } | |
2828 | else | |
2829 | inhibit_storing = 1; | |
2830 | } | |
2831 | ||
2832 | if (!inhibit_storing) | |
2833 | vec[idx] = overlay; | |
2834 | /* Keep counting overlays even if we can't return them all. */ | |
2835 | idx++; | |
2836 | } | |
2837 | else if (startpos < next) | |
2838 | next = startpos; | |
2839 | } | |
2840 | ||
2410d73a | 2841 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
74514898 RS |
2842 | { |
2843 | int startpos, endpos; | |
2844 | ||
2410d73a | 2845 | XSETMISC (overlay, tail); |
74514898 RS |
2846 | |
2847 | ostart = OVERLAY_START (overlay); | |
2848 | oend = OVERLAY_END (overlay); | |
2849 | startpos = OVERLAY_POSITION (ostart); | |
2850 | if (end < startpos) | |
2851 | { | |
2852 | if (startpos < next) | |
2853 | next = startpos; | |
2854 | break; | |
2855 | } | |
2856 | endpos = OVERLAY_POSITION (oend); | |
7723e095 MR |
2857 | /* Count an interval if it overlaps the range, is empty at the |
2858 | start of the range, or is empty at END provided END denotes the | |
2859 | end of the buffer. */ | |
74514898 | 2860 | if ((beg < endpos && startpos < end) |
7723e095 MR |
2861 | || (startpos == endpos |
2862 | && (beg == endpos || (end_is_Z && endpos == end)))) | |
74514898 RS |
2863 | { |
2864 | if (idx == len) | |
2865 | { | |
2866 | if (extend) | |
2867 | { | |
4b0e44fc RS |
2868 | /* Make it work with an initial len == 0. */ |
2869 | len *= 2; | |
2870 | if (len == 0) | |
2871 | len = 4; | |
2872 | *len_ptr = len; | |
74514898 RS |
2873 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2874 | *vec_ptr = vec; | |
2875 | } | |
2876 | else | |
2877 | inhibit_storing = 1; | |
2878 | } | |
2879 | ||
2880 | if (!inhibit_storing) | |
2881 | vec[idx] = overlay; | |
2882 | idx++; | |
2883 | } | |
2884 | else if (endpos < beg && endpos > prev) | |
2885 | prev = endpos; | |
2886 | } | |
fc04fa47 | 2887 | |
74514898 RS |
2888 | if (next_ptr) |
2889 | *next_ptr = next; | |
2890 | if (prev_ptr) | |
2891 | *prev_ptr = prev; | |
2892 | return idx; | |
2893 | } | |
09a22085 GM |
2894 | |
2895 | ||
2896 | /* Return non-zero if there exists an overlay with a non-nil | |
2897 | `mouse-face' property overlapping OVERLAY. */ | |
2898 | ||
2899 | int | |
d3da34e0 | 2900 | mouse_face_overlay_overlaps (Lisp_Object overlay) |
09a22085 GM |
2901 | { |
2902 | int start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2903 | int end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
bfd8410f | 2904 | int n, i, size; |
09a22085 | 2905 | Lisp_Object *v, tem; |
177c0ea7 | 2906 | |
bfd8410f GM |
2907 | size = 10; |
2908 | v = (Lisp_Object *) alloca (size * sizeof *v); | |
2909 | n = overlays_in (start, end, 0, &v, &size, NULL, NULL); | |
2910 | if (n > size) | |
09a22085 | 2911 | { |
09a22085 GM |
2912 | v = (Lisp_Object *) alloca (n * sizeof *v); |
2913 | overlays_in (start, end, 0, &v, &n, NULL, NULL); | |
2914 | } | |
2915 | ||
2916 | for (i = 0; i < n; ++i) | |
2917 | if (!EQ (v[i], overlay) | |
2918 | && (tem = Foverlay_get (overlay, Qmouse_face), | |
2919 | !NILP (tem))) | |
2920 | break; | |
2921 | ||
2922 | return i < n; | |
2923 | } | |
2924 | ||
2925 | ||
74514898 | 2926 | \f |
fc04fa47 KH |
2927 | /* Fast function to just test if we're at an overlay boundary. */ |
2928 | int | |
d3da34e0 | 2929 | overlay_touches_p (int pos) |
fc04fa47 | 2930 | { |
2410d73a SM |
2931 | Lisp_Object overlay; |
2932 | struct Lisp_Overlay *tail; | |
fc04fa47 | 2933 | |
2410d73a | 2934 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
fc04fa47 KH |
2935 | { |
2936 | int endpos; | |
2937 | ||
2410d73a | 2938 | XSETMISC (overlay ,tail); |
8e50cc2d | 2939 | if (!OVERLAYP (overlay)) |
fc04fa47 KH |
2940 | abort (); |
2941 | ||
2942 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2943 | if (endpos < pos) | |
2944 | break; | |
2945 | if (endpos == pos || OVERLAY_POSITION (OVERLAY_START (overlay)) == pos) | |
2946 | return 1; | |
2947 | } | |
2948 | ||
2410d73a | 2949 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
fc04fa47 KH |
2950 | { |
2951 | int startpos; | |
2952 | ||
2410d73a | 2953 | XSETMISC (overlay, tail); |
8e50cc2d | 2954 | if (!OVERLAYP (overlay)) |
fc04fa47 KH |
2955 | abort (); |
2956 | ||
2957 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2958 | if (pos < startpos) | |
2959 | break; | |
2960 | if (startpos == pos || OVERLAY_POSITION (OVERLAY_END (overlay)) == pos) | |
2961 | return 1; | |
2962 | } | |
2963 | return 0; | |
2964 | } | |
2eec3b4e | 2965 | \f |
5985d248 KH |
2966 | struct sortvec |
2967 | { | |
2968 | Lisp_Object overlay; | |
2969 | int beg, end; | |
2970 | int priority; | |
2971 | }; | |
2972 | ||
2973 | static int | |
d3da34e0 | 2974 | compare_overlays (const void *v1, const void *v2) |
5985d248 | 2975 | { |
dfcf069d AS |
2976 | const struct sortvec *s1 = (const struct sortvec *) v1; |
2977 | const struct sortvec *s2 = (const struct sortvec *) v2; | |
5985d248 KH |
2978 | if (s1->priority != s2->priority) |
2979 | return s1->priority - s2->priority; | |
2980 | if (s1->beg != s2->beg) | |
2981 | return s1->beg - s2->beg; | |
2982 | if (s1->end != s2->end) | |
2983 | return s2->end - s1->end; | |
2984 | return 0; | |
2985 | } | |
2986 | ||
2987 | /* Sort an array of overlays by priority. The array is modified in place. | |
2988 | The return value is the new size; this may be smaller than the original | |
2989 | size if some of the overlays were invalid or were window-specific. */ | |
2990 | int | |
d3da34e0 | 2991 | sort_overlays (Lisp_Object *overlay_vec, int noverlays, struct window *w) |
5985d248 KH |
2992 | { |
2993 | int i, j; | |
2994 | struct sortvec *sortvec; | |
2995 | sortvec = (struct sortvec *) alloca (noverlays * sizeof (struct sortvec)); | |
2996 | ||
2997 | /* Put the valid and relevant overlays into sortvec. */ | |
2998 | ||
2999 | for (i = 0, j = 0; i < noverlays; i++) | |
3000 | { | |
0fa767e7 | 3001 | Lisp_Object tem; |
c99fc30f | 3002 | Lisp_Object overlay; |
5985d248 | 3003 | |
c99fc30f | 3004 | overlay = overlay_vec[i]; |
5985d248 KH |
3005 | if (OVERLAY_VALID (overlay) |
3006 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 | |
3007 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
3008 | { | |
0fa767e7 KH |
3009 | /* If we're interested in a specific window, then ignore |
3010 | overlays that are limited to some other window. */ | |
3011 | if (w) | |
5985d248 | 3012 | { |
0fa767e7 KH |
3013 | Lisp_Object window; |
3014 | ||
3015 | window = Foverlay_get (overlay, Qwindow); | |
a7a60ce9 | 3016 | if (WINDOWP (window) && XWINDOW (window) != w) |
0fa767e7 | 3017 | continue; |
5985d248 | 3018 | } |
0fa767e7 KH |
3019 | |
3020 | /* This overlay is good and counts: put it into sortvec. */ | |
3021 | sortvec[j].overlay = overlay; | |
3022 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3023 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3024 | tem = Foverlay_get (overlay, Qpriority); | |
3025 | if (INTEGERP (tem)) | |
3026 | sortvec[j].priority = XINT (tem); | |
3027 | else | |
3028 | sortvec[j].priority = 0; | |
3029 | j++; | |
5985d248 KH |
3030 | } |
3031 | } | |
3032 | noverlays = j; | |
3033 | ||
3034 | /* Sort the overlays into the proper order: increasing priority. */ | |
3035 | ||
3036 | if (noverlays > 1) | |
3037 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
3038 | ||
3039 | for (i = 0; i < noverlays; i++) | |
3040 | overlay_vec[i] = sortvec[i].overlay; | |
3041 | return (noverlays); | |
3042 | } | |
3043 | \f | |
bbbe9545 KH |
3044 | struct sortstr |
3045 | { | |
cb26008f | 3046 | Lisp_Object string, string2; |
bbbe9545 KH |
3047 | int size; |
3048 | int priority; | |
3049 | }; | |
3050 | ||
e8185fa8 KH |
3051 | struct sortstrlist |
3052 | { | |
3053 | struct sortstr *buf; /* An array that expands as needed; never freed. */ | |
3054 | int size; /* Allocated length of that array. */ | |
3055 | int used; /* How much of the array is currently in use. */ | |
3056 | int bytes; /* Total length of the strings in buf. */ | |
3057 | }; | |
3058 | ||
3059 | /* Buffers for storing information about the overlays touching a given | |
3060 | position. These could be automatic variables in overlay_strings, but | |
3061 | it's more efficient to hold onto the memory instead of repeatedly | |
3062 | allocating and freeing it. */ | |
3063 | static struct sortstrlist overlay_heads, overlay_tails; | |
9492daf2 | 3064 | static unsigned char *overlay_str_buf; |
e8185fa8 KH |
3065 | |
3066 | /* Allocated length of overlay_str_buf. */ | |
3067 | static int overlay_str_len; | |
3068 | ||
bbbe9545 KH |
3069 | /* A comparison function suitable for passing to qsort. */ |
3070 | static int | |
d3da34e0 | 3071 | cmp_for_strings (const void *as1, const void *as2) |
bbbe9545 KH |
3072 | { |
3073 | struct sortstr *s1 = (struct sortstr *)as1; | |
3074 | struct sortstr *s2 = (struct sortstr *)as2; | |
3075 | if (s1->size != s2->size) | |
3076 | return s2->size - s1->size; | |
3077 | if (s1->priority != s2->priority) | |
3078 | return s1->priority - s2->priority; | |
3079 | return 0; | |
3080 | } | |
3081 | ||
e8185fa8 | 3082 | static void |
d3da34e0 | 3083 | record_overlay_string (struct sortstrlist *ssl, Lisp_Object str, Lisp_Object str2, Lisp_Object pri, int size) |
e8185fa8 | 3084 | { |
43d27a72 RS |
3085 | int nbytes; |
3086 | ||
e8185fa8 KH |
3087 | if (ssl->used == ssl->size) |
3088 | { | |
3089 | if (ssl->buf) | |
3090 | ssl->size *= 2; | |
3091 | else | |
3092 | ssl->size = 5; | |
3093 | ssl->buf = ((struct sortstr *) | |
3094 | xrealloc (ssl->buf, ssl->size * sizeof (struct sortstr))); | |
3095 | } | |
3096 | ssl->buf[ssl->used].string = str; | |
cb26008f | 3097 | ssl->buf[ssl->used].string2 = str2; |
e8185fa8 KH |
3098 | ssl->buf[ssl->used].size = size; |
3099 | ssl->buf[ssl->used].priority = (INTEGERP (pri) ? XINT (pri) : 0); | |
3100 | ssl->used++; | |
43d27a72 RS |
3101 | |
3102 | if (NILP (current_buffer->enable_multibyte_characters)) | |
d5db4077 | 3103 | nbytes = SCHARS (str); |
43d27a72 | 3104 | else if (! STRING_MULTIBYTE (str)) |
d5db4077 KR |
3105 | nbytes = count_size_as_multibyte (SDATA (str), |
3106 | SBYTES (str)); | |
43d27a72 | 3107 | else |
d5db4077 | 3108 | nbytes = SBYTES (str); |
43d27a72 RS |
3109 | |
3110 | ssl->bytes += nbytes; | |
3111 | ||
cb26008f | 3112 | if (STRINGP (str2)) |
43d27a72 RS |
3113 | { |
3114 | if (NILP (current_buffer->enable_multibyte_characters)) | |
d5db4077 | 3115 | nbytes = SCHARS (str2); |
43d27a72 | 3116 | else if (! STRING_MULTIBYTE (str2)) |
d5db4077 KR |
3117 | nbytes = count_size_as_multibyte (SDATA (str2), |
3118 | SBYTES (str2)); | |
43d27a72 | 3119 | else |
d5db4077 | 3120 | nbytes = SBYTES (str2); |
43d27a72 RS |
3121 | |
3122 | ssl->bytes += nbytes; | |
3123 | } | |
e8185fa8 | 3124 | } |
bbbe9545 KH |
3125 | |
3126 | /* Return the concatenation of the strings associated with overlays that | |
3127 | begin or end at POS, ignoring overlays that are specific to a window | |
3128 | other than W. The strings are concatenated in the appropriate order: | |
3129 | shorter overlays nest inside longer ones, and higher priority inside | |
cb26008f KH |
3130 | lower. Normally all of the after-strings come first, but zero-sized |
3131 | overlays have their after-strings ride along with the before-strings | |
3132 | because it would look strange to print them inside-out. | |
3133 | ||
3134 | Returns the string length, and stores the contents indirectly through | |
3135 | PSTR, if that variable is non-null. The string may be overwritten by | |
3136 | subsequent calls. */ | |
6b5d3b89 | 3137 | |
bbbe9545 | 3138 | int |
d3da34e0 | 3139 | overlay_strings (EMACS_INT pos, struct window *w, unsigned char **pstr) |
bbbe9545 | 3140 | { |
2410d73a SM |
3141 | Lisp_Object overlay, window, str; |
3142 | struct Lisp_Overlay *ov; | |
bbbe9545 | 3143 | int startpos, endpos; |
43d27a72 | 3144 | int multibyte = ! NILP (current_buffer->enable_multibyte_characters); |
bbbe9545 | 3145 | |
e8185fa8 KH |
3146 | overlay_heads.used = overlay_heads.bytes = 0; |
3147 | overlay_tails.used = overlay_tails.bytes = 0; | |
2410d73a | 3148 | for (ov = current_buffer->overlays_before; ov; ov = ov->next) |
bbbe9545 | 3149 | { |
2410d73a | 3150 | XSETMISC (overlay, ov); |
c2d5b10f | 3151 | eassert (OVERLAYP (overlay)); |
bbbe9545 KH |
3152 | |
3153 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3154 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3155 | if (endpos < pos) | |
3156 | break; | |
3157 | if (endpos != pos && startpos != pos) | |
3158 | continue; | |
3159 | window = Foverlay_get (overlay, Qwindow); | |
3160 | if (WINDOWP (window) && XWINDOW (window) != w) | |
3161 | continue; | |
e8185fa8 KH |
3162 | if (startpos == pos |
3163 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3164 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3165 | (startpos == endpos |
3166 | ? Foverlay_get (overlay, Qafter_string) | |
3167 | : Qnil), | |
3168 | Foverlay_get (overlay, Qpriority), | |
3169 | endpos - startpos); | |
3170 | else if (endpos == pos | |
3171 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3172 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3173 | Foverlay_get (overlay, Qpriority), |
3174 | endpos - startpos); | |
bbbe9545 | 3175 | } |
2410d73a | 3176 | for (ov = current_buffer->overlays_after; ov; ov = ov->next) |
bbbe9545 | 3177 | { |
2410d73a SM |
3178 | XSETMISC (overlay, ov); |
3179 | eassert (OVERLAYP (overlay)); | |
bbbe9545 KH |
3180 | |
3181 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3182 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3183 | if (startpos > pos) | |
3184 | break; | |
e8185fa8 KH |
3185 | if (endpos != pos && startpos != pos) |
3186 | continue; | |
3187 | window = Foverlay_get (overlay, Qwindow); | |
3188 | if (WINDOWP (window) && XWINDOW (window) != w) | |
3189 | continue; | |
e8185fa8 KH |
3190 | if (startpos == pos |
3191 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3192 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3193 | (startpos == endpos |
3194 | ? Foverlay_get (overlay, Qafter_string) | |
3195 | : Qnil), | |
3196 | Foverlay_get (overlay, Qpriority), | |
3197 | endpos - startpos); | |
3198 | else if (endpos == pos | |
3199 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3200 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3201 | Foverlay_get (overlay, Qpriority), |
3202 | endpos - startpos); | |
bbbe9545 | 3203 | } |
e8185fa8 KH |
3204 | if (overlay_tails.used > 1) |
3205 | qsort (overlay_tails.buf, overlay_tails.used, sizeof (struct sortstr), | |
3206 | cmp_for_strings); | |
3207 | if (overlay_heads.used > 1) | |
3208 | qsort (overlay_heads.buf, overlay_heads.used, sizeof (struct sortstr), | |
3209 | cmp_for_strings); | |
3210 | if (overlay_heads.bytes || overlay_tails.bytes) | |
bbbe9545 | 3211 | { |
e8185fa8 | 3212 | Lisp_Object tem; |
bbbe9545 | 3213 | int i; |
9f4d7cde | 3214 | unsigned char *p; |
e8185fa8 | 3215 | int total = overlay_heads.bytes + overlay_tails.bytes; |
bbbe9545 KH |
3216 | |
3217 | if (total > overlay_str_len) | |
9f4d7cde RS |
3218 | { |
3219 | overlay_str_len = total; | |
3220 | overlay_str_buf = (unsigned char *)xrealloc (overlay_str_buf, | |
3221 | total); | |
3222 | } | |
bbbe9545 | 3223 | p = overlay_str_buf; |
e8185fa8 | 3224 | for (i = overlay_tails.used; --i >= 0;) |
bbbe9545 | 3225 | { |
43d27a72 | 3226 | int nbytes; |
e8185fa8 | 3227 | tem = overlay_tails.buf[i].string; |
d5db4077 KR |
3228 | nbytes = copy_text (SDATA (tem), p, |
3229 | SBYTES (tem), | |
43d27a72 RS |
3230 | STRING_MULTIBYTE (tem), multibyte); |
3231 | p += nbytes; | |
bbbe9545 | 3232 | } |
e8185fa8 | 3233 | for (i = 0; i < overlay_heads.used; ++i) |
bbbe9545 | 3234 | { |
43d27a72 | 3235 | int nbytes; |
e8185fa8 | 3236 | tem = overlay_heads.buf[i].string; |
d5db4077 KR |
3237 | nbytes = copy_text (SDATA (tem), p, |
3238 | SBYTES (tem), | |
43d27a72 RS |
3239 | STRING_MULTIBYTE (tem), multibyte); |
3240 | p += nbytes; | |
cb26008f KH |
3241 | tem = overlay_heads.buf[i].string2; |
3242 | if (STRINGP (tem)) | |
3243 | { | |
d5db4077 KR |
3244 | nbytes = copy_text (SDATA (tem), p, |
3245 | SBYTES (tem), | |
43d27a72 RS |
3246 | STRING_MULTIBYTE (tem), multibyte); |
3247 | p += nbytes; | |
cb26008f | 3248 | } |
bbbe9545 | 3249 | } |
cb26008f KH |
3250 | if (p != overlay_str_buf + total) |
3251 | abort (); | |
bbbe9545 KH |
3252 | if (pstr) |
3253 | *pstr = overlay_str_buf; | |
e8185fa8 | 3254 | return total; |
bbbe9545 | 3255 | } |
e8185fa8 | 3256 | return 0; |
bbbe9545 KH |
3257 | } |
3258 | \f | |
5c4f68f1 | 3259 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 3260 | |
2eec3b4e | 3261 | void |
d3da34e0 | 3262 | recenter_overlay_lists (struct buffer *buf, EMACS_INT pos) |
2eec3b4e | 3263 | { |
2410d73a SM |
3264 | Lisp_Object overlay, beg, end; |
3265 | struct Lisp_Overlay *prev, *tail, *next; | |
2eec3b4e RS |
3266 | |
3267 | /* See if anything in overlays_before should move to overlays_after. */ | |
3268 | ||
3269 | /* We don't strictly need prev in this loop; it should always be nil. | |
3270 | But we use it for symmetry and in case that should cease to be true | |
3271 | with some future change. */ | |
2410d73a SM |
3272 | prev = NULL; |
3273 | for (tail = buf->overlays_before; tail; prev = tail, tail = next) | |
1ab256cb | 3274 | { |
2410d73a SM |
3275 | next = tail->next; |
3276 | XSETMISC (overlay, tail); | |
2eec3b4e RS |
3277 | |
3278 | /* If the overlay is not valid, get rid of it. */ | |
3279 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3280 | #if 1 |
3281 | abort (); | |
3282 | #else | |
2eec3b4e RS |
3283 | { |
3284 | /* Splice the cons cell TAIL out of overlays_before. */ | |
3285 | if (!NILP (prev)) | |
7539e11f | 3286 | XCDR (prev) = next; |
2eec3b4e | 3287 | else |
5c4f68f1 | 3288 | buf->overlays_before = next; |
2eec3b4e RS |
3289 | tail = prev; |
3290 | continue; | |
3291 | } | |
52f8ec73 | 3292 | #endif |
1ab256cb | 3293 | |
2eec3b4e RS |
3294 | beg = OVERLAY_START (overlay); |
3295 | end = OVERLAY_END (overlay); | |
1ab256cb | 3296 | |
2eec3b4e | 3297 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 3298 | { |
2eec3b4e RS |
3299 | /* OVERLAY needs to be moved. */ |
3300 | int where = OVERLAY_POSITION (beg); | |
2410d73a | 3301 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3302 | |
3303 | /* Splice the cons cell TAIL out of overlays_before. */ | |
2410d73a SM |
3304 | if (prev) |
3305 | prev->next = next; | |
2eec3b4e | 3306 | else |
5c4f68f1 | 3307 | buf->overlays_before = next; |
2eec3b4e RS |
3308 | |
3309 | /* Search thru overlays_after for where to put it. */ | |
2410d73a SM |
3310 | other_prev = NULL; |
3311 | for (other = buf->overlays_after; other; | |
3312 | other_prev = other, other = other->next) | |
1ab256cb | 3313 | { |
6af718a4 | 3314 | Lisp_Object otherbeg, otheroverlay; |
2eec3b4e | 3315 | |
2410d73a SM |
3316 | XSETMISC (otheroverlay, other); |
3317 | eassert (OVERLAY_VALID (otheroverlay)); | |
2eec3b4e RS |
3318 | |
3319 | otherbeg = OVERLAY_START (otheroverlay); | |
3320 | if (OVERLAY_POSITION (otherbeg) >= where) | |
3321 | break; | |
1ab256cb | 3322 | } |
2eec3b4e RS |
3323 | |
3324 | /* Add TAIL to overlays_after before OTHER. */ | |
2410d73a SM |
3325 | tail->next = other; |
3326 | if (other_prev) | |
3327 | other_prev->next = tail; | |
1ab256cb | 3328 | else |
5c4f68f1 | 3329 | buf->overlays_after = tail; |
2eec3b4e | 3330 | tail = prev; |
1ab256cb | 3331 | } |
2eec3b4e RS |
3332 | else |
3333 | /* We've reached the things that should stay in overlays_before. | |
3334 | All the rest of overlays_before must end even earlier, | |
3335 | so stop now. */ | |
3336 | break; | |
3337 | } | |
3338 | ||
3339 | /* See if anything in overlays_after should be in overlays_before. */ | |
2410d73a SM |
3340 | prev = NULL; |
3341 | for (tail = buf->overlays_after; tail; prev = tail, tail = next) | |
2eec3b4e | 3342 | { |
2410d73a SM |
3343 | next = tail->next; |
3344 | XSETMISC (overlay, tail); | |
2eec3b4e RS |
3345 | |
3346 | /* If the overlay is not valid, get rid of it. */ | |
3347 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3348 | #if 1 |
3349 | abort (); | |
3350 | #else | |
2eec3b4e RS |
3351 | { |
3352 | /* Splice the cons cell TAIL out of overlays_after. */ | |
3353 | if (!NILP (prev)) | |
7539e11f | 3354 | XCDR (prev) = next; |
2eec3b4e | 3355 | else |
5c4f68f1 | 3356 | buf->overlays_after = next; |
2eec3b4e RS |
3357 | tail = prev; |
3358 | continue; | |
3359 | } | |
52f8ec73 | 3360 | #endif |
2eec3b4e RS |
3361 | |
3362 | beg = OVERLAY_START (overlay); | |
3363 | end = OVERLAY_END (overlay); | |
3364 | ||
3365 | /* Stop looking, when we know that nothing further | |
3366 | can possibly end before POS. */ | |
3367 | if (OVERLAY_POSITION (beg) > pos) | |
3368 | break; | |
3369 | ||
3370 | if (OVERLAY_POSITION (end) <= pos) | |
3371 | { | |
3372 | /* OVERLAY needs to be moved. */ | |
3373 | int where = OVERLAY_POSITION (end); | |
2410d73a | 3374 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3375 | |
3376 | /* Splice the cons cell TAIL out of overlays_after. */ | |
2410d73a SM |
3377 | if (prev) |
3378 | prev->next = next; | |
2eec3b4e | 3379 | else |
5c4f68f1 | 3380 | buf->overlays_after = next; |
2eec3b4e RS |
3381 | |
3382 | /* Search thru overlays_before for where to put it. */ | |
2410d73a SM |
3383 | other_prev = NULL; |
3384 | for (other = buf->overlays_before; other; | |
3385 | other_prev = other, other = other->next) | |
2eec3b4e RS |
3386 | { |
3387 | Lisp_Object otherend, otheroverlay; | |
2eec3b4e | 3388 | |
2410d73a SM |
3389 | XSETMISC (otheroverlay, other); |
3390 | eassert (OVERLAY_VALID (otheroverlay)); | |
2eec3b4e RS |
3391 | |
3392 | otherend = OVERLAY_END (otheroverlay); | |
3393 | if (OVERLAY_POSITION (otherend) <= where) | |
3394 | break; | |
3395 | } | |
3396 | ||
3397 | /* Add TAIL to overlays_before before OTHER. */ | |
2410d73a SM |
3398 | tail->next = other; |
3399 | if (other_prev) | |
3400 | other_prev->next = tail; | |
2eec3b4e | 3401 | else |
5c4f68f1 | 3402 | buf->overlays_before = tail; |
2eec3b4e RS |
3403 | tail = prev; |
3404 | } | |
3405 | } | |
3406 | ||
c2d5b10f | 3407 | buf->overlay_center = pos; |
2eec3b4e | 3408 | } |
2b1bdf65 | 3409 | |
423cdb46 | 3410 | void |
d3da34e0 | 3411 | adjust_overlays_for_insert (EMACS_INT pos, EMACS_INT length) |
423cdb46 KH |
3412 | { |
3413 | /* After an insertion, the lists are still sorted properly, | |
3414 | but we may need to update the value of the overlay center. */ | |
c2d5b10f SM |
3415 | if (current_buffer->overlay_center >= pos) |
3416 | current_buffer->overlay_center += length; | |
423cdb46 KH |
3417 | } |
3418 | ||
3419 | void | |
d3da34e0 | 3420 | adjust_overlays_for_delete (EMACS_INT pos, EMACS_INT length) |
423cdb46 | 3421 | { |
c2d5b10f | 3422 | if (current_buffer->overlay_center < pos) |
423cdb46 KH |
3423 | /* The deletion was to our right. No change needed; the before- and |
3424 | after-lists are still consistent. */ | |
3425 | ; | |
c2d5b10f | 3426 | else if (current_buffer->overlay_center > pos + length) |
423cdb46 KH |
3427 | /* The deletion was to our left. We need to adjust the center value |
3428 | to account for the change in position, but the lists are consistent | |
3429 | given the new value. */ | |
c2d5b10f | 3430 | current_buffer->overlay_center -= length; |
423cdb46 KH |
3431 | else |
3432 | /* We're right in the middle. There might be things on the after-list | |
3433 | that now belong on the before-list. Recentering will move them, | |
3434 | and also update the center point. */ | |
3435 | recenter_overlay_lists (current_buffer, pos); | |
3436 | } | |
3437 | ||
2b1bdf65 KH |
3438 | /* Fix up overlays that were garbled as a result of permuting markers |
3439 | in the range START through END. Any overlay with at least one | |
3440 | endpoint in this range will need to be unlinked from the overlay | |
3441 | list and reinserted in its proper place. | |
3442 | Such an overlay might even have negative size at this point. | |
6b61353c | 3443 | If so, we'll make the overlay empty. */ |
2b1bdf65 | 3444 | void |
d3da34e0 | 3445 | fix_start_end_in_overlays (register int start, register int end) |
2b1bdf65 | 3446 | { |
6af718a4 | 3447 | Lisp_Object overlay; |
2410d73a | 3448 | struct Lisp_Overlay *before_list, *after_list; |
1138e742 KR |
3449 | /* These are either nil, indicating that before_list or after_list |
3450 | should be assigned, or the cons cell the cdr of which should be | |
3451 | assigned. */ | |
2410d73a | 3452 | struct Lisp_Overlay *beforep = NULL, *afterp = NULL; |
1138e742 KR |
3453 | /* 'Parent', likewise, indicates a cons cell or |
3454 | current_buffer->overlays_before or overlays_after, depending | |
3455 | which loop we're in. */ | |
2410d73a | 3456 | struct Lisp_Overlay *tail, *parent; |
2b1bdf65 KH |
3457 | int startpos, endpos; |
3458 | ||
3459 | /* This algorithm shifts links around instead of consing and GCing. | |
3460 | The loop invariant is that before_list (resp. after_list) is a | |
1138e742 KR |
3461 | well-formed list except that its last element, the CDR of beforep |
3462 | (resp. afterp) if beforep (afterp) isn't nil or before_list | |
3463 | (after_list) if it is, is still uninitialized. So it's not a bug | |
3464 | that before_list isn't initialized, although it may look | |
3465 | strange. */ | |
2410d73a | 3466 | for (parent = NULL, tail = current_buffer->overlays_before; tail;) |
2b1bdf65 | 3467 | { |
2410d73a | 3468 | XSETMISC (overlay, tail); |
6b61353c | 3469 | |
2b1bdf65 | 3470 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
6b61353c KH |
3471 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3472 | ||
3473 | /* If the overlay is backwards, make it empty. */ | |
3474 | if (endpos < startpos) | |
3475 | { | |
3476 | startpos = endpos; | |
3477 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
3478 | Qnil); | |
3479 | } | |
3480 | ||
2b1bdf65 KH |
3481 | if (endpos < start) |
3482 | break; | |
60ebfdf3 | 3483 | |
2b1bdf65 KH |
3484 | if (endpos < end |
3485 | || (startpos >= start && startpos < end)) | |
3486 | { | |
2b1bdf65 KH |
3487 | /* Add it to the end of the wrong list. Later on, |
3488 | recenter_overlay_lists will move it to the right place. */ | |
c2d5b10f | 3489 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3490 | { |
2410d73a | 3491 | if (!afterp) |
1138e742 KR |
3492 | after_list = tail; |
3493 | else | |
2410d73a | 3494 | afterp->next = tail; |
1138e742 | 3495 | afterp = tail; |
2b1bdf65 KH |
3496 | } |
3497 | else | |
3498 | { | |
2410d73a | 3499 | if (!beforep) |
1138e742 KR |
3500 | before_list = tail; |
3501 | else | |
2410d73a | 3502 | beforep->next = tail; |
1138e742 | 3503 | beforep = tail; |
2b1bdf65 | 3504 | } |
2410d73a SM |
3505 | if (!parent) |
3506 | current_buffer->overlays_before = tail->next; | |
1138e742 | 3507 | else |
2410d73a SM |
3508 | parent->next = tail->next; |
3509 | tail = tail->next; | |
2b1bdf65 KH |
3510 | } |
3511 | else | |
2410d73a | 3512 | parent = tail, tail = parent->next; |
2b1bdf65 | 3513 | } |
2410d73a | 3514 | for (parent = NULL, tail = current_buffer->overlays_after; tail;) |
2b1bdf65 | 3515 | { |
2410d73a | 3516 | XSETMISC (overlay, tail); |
6b61353c | 3517 | |
2b1bdf65 | 3518 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
6b61353c KH |
3519 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
3520 | ||
3521 | /* If the overlay is backwards, make it empty. */ | |
3522 | if (endpos < startpos) | |
3523 | { | |
3524 | startpos = endpos; | |
3525 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
60ebfdf3 | 3526 | Qnil); |
6b61353c KH |
3527 | } |
3528 | ||
2b1bdf65 KH |
3529 | if (startpos >= end) |
3530 | break; | |
6b61353c | 3531 | |
2b1bdf65 KH |
3532 | if (startpos >= start |
3533 | || (endpos >= start && endpos < end)) | |
3534 | { | |
c2d5b10f | 3535 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3536 | { |
2410d73a | 3537 | if (!afterp) |
1138e742 KR |
3538 | after_list = tail; |
3539 | else | |
2410d73a | 3540 | afterp->next = tail; |
1138e742 | 3541 | afterp = tail; |
2b1bdf65 KH |
3542 | } |
3543 | else | |
3544 | { | |
2410d73a | 3545 | if (!beforep) |
1138e742 KR |
3546 | before_list = tail; |
3547 | else | |
2410d73a | 3548 | beforep->next = tail; |
1138e742 | 3549 | beforep = tail; |
2b1bdf65 | 3550 | } |
2410d73a SM |
3551 | if (!parent) |
3552 | current_buffer->overlays_after = tail->next; | |
1138e742 | 3553 | else |
2410d73a SM |
3554 | parent->next = tail->next; |
3555 | tail = tail->next; | |
2b1bdf65 KH |
3556 | } |
3557 | else | |
2410d73a | 3558 | parent = tail, tail = parent->next; |
2b1bdf65 KH |
3559 | } |
3560 | ||
3561 | /* Splice the constructed (wrong) lists into the buffer's lists, | |
3562 | and let the recenter function make it sane again. */ | |
2410d73a | 3563 | if (beforep) |
1138e742 | 3564 | { |
2410d73a | 3565 | beforep->next = current_buffer->overlays_before; |
1138e742 KR |
3566 | current_buffer->overlays_before = before_list; |
3567 | } | |
c2d5b10f | 3568 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3569 | |
2410d73a | 3570 | if (afterp) |
1138e742 | 3571 | { |
2410d73a | 3572 | afterp->next = current_buffer->overlays_after; |
1138e742 KR |
3573 | current_buffer->overlays_after = after_list; |
3574 | } | |
c2d5b10f | 3575 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3576 | } |
3b06f880 KH |
3577 | |
3578 | /* We have two types of overlay: the one whose ending marker is | |
3579 | after-insertion-marker (this is the usual case) and the one whose | |
3580 | ending marker is before-insertion-marker. When `overlays_before' | |
3581 | contains overlays of the latter type and the former type in this | |
3582 | order and both overlays end at inserting position, inserting a text | |
3583 | increases only the ending marker of the latter type, which results | |
3584 | in incorrect ordering of `overlays_before'. | |
3585 | ||
3586 | This function fixes ordering of overlays in the slot | |
3587 | `overlays_before' of the buffer *BP. Before the insertion, `point' | |
3588 | was at PREV, and now is at POS. */ | |
3589 | ||
01136e9b | 3590 | void |
d3da34e0 | 3591 | fix_overlays_before (struct buffer *bp, EMACS_INT prev, EMACS_INT pos) |
3b06f880 | 3592 | { |
2410d73a SM |
3593 | /* If parent is nil, replace overlays_before; otherwise, parent->next. */ |
3594 | struct Lisp_Overlay *tail = bp->overlays_before, *parent = NULL, *right_pair; | |
3595 | Lisp_Object tem; | |
c2d5b10f | 3596 | EMACS_INT end; |
3b06f880 KH |
3597 | |
3598 | /* After the insertion, the several overlays may be in incorrect | |
3599 | order. The possibility is that, in the list `overlays_before', | |
3600 | an overlay which ends at POS appears after an overlay which ends | |
3601 | at PREV. Since POS is greater than PREV, we must fix the | |
3602 | ordering of these overlays, by moving overlays ends at POS before | |
3603 | the overlays ends at PREV. */ | |
3604 | ||
3605 | /* At first, find a place where disordered overlays should be linked | |
3606 | in. It is where an overlay which end before POS exists. (i.e. an | |
3607 | overlay whose ending marker is after-insertion-marker if disorder | |
3608 | exists). */ | |
2410d73a SM |
3609 | while (tail |
3610 | && (XSETMISC (tem, tail), | |
3611 | (end = OVERLAY_POSITION (OVERLAY_END (tem))) >= pos)) | |
1138e742 KR |
3612 | { |
3613 | parent = tail; | |
2410d73a | 3614 | tail = tail->next; |
1138e742 | 3615 | } |
3b06f880 KH |
3616 | |
3617 | /* If we don't find such an overlay, | |
3618 | or the found one ends before PREV, | |
3619 | or the found one is the last one in the list, | |
3620 | we don't have to fix anything. */ | |
f93ad4cf | 3621 | if (!tail || end < prev || !tail->next) |
3b06f880 KH |
3622 | return; |
3623 | ||
1138e742 KR |
3624 | right_pair = parent; |
3625 | parent = tail; | |
2410d73a | 3626 | tail = tail->next; |
3b06f880 | 3627 | |
1138e742 | 3628 | /* Now, end position of overlays in the list TAIL should be before |
3b06f880 | 3629 | or equal to PREV. In the loop, an overlay which ends at POS is |
1138e742 KR |
3630 | moved ahead to the place indicated by the CDR of RIGHT_PAIR. If |
3631 | we found an overlay which ends before PREV, the remaining | |
3632 | overlays are in correct order. */ | |
2410d73a | 3633 | while (tail) |
3b06f880 | 3634 | { |
2410d73a SM |
3635 | XSETMISC (tem, tail); |
3636 | end = OVERLAY_POSITION (OVERLAY_END (tem)); | |
3b06f880 KH |
3637 | |
3638 | if (end == pos) | |
3639 | { /* This overlay is disordered. */ | |
2410d73a | 3640 | struct Lisp_Overlay *found = tail; |
3b06f880 KH |
3641 | |
3642 | /* Unlink the found overlay. */ | |
2410d73a SM |
3643 | tail = found->next; |
3644 | parent->next = tail; | |
1138e742 KR |
3645 | /* Move an overlay at RIGHT_PLACE to the next of the found one, |
3646 | and link it into the right place. */ | |
2410d73a | 3647 | if (!right_pair) |
1138e742 | 3648 | { |
2410d73a | 3649 | found->next = bp->overlays_before; |
1138e742 KR |
3650 | bp->overlays_before = found; |
3651 | } | |
3652 | else | |
3653 | { | |
2410d73a SM |
3654 | found->next = right_pair->next; |
3655 | right_pair->next = found; | |
1138e742 | 3656 | } |
3b06f880 KH |
3657 | } |
3658 | else if (end == prev) | |
1138e742 KR |
3659 | { |
3660 | parent = tail; | |
2410d73a | 3661 | tail = tail->next; |
1138e742 | 3662 | } |
3b06f880 KH |
3663 | else /* No more disordered overlay. */ |
3664 | break; | |
3665 | } | |
3666 | } | |
2eec3b4e | 3667 | \f |
52f8ec73 | 3668 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
7ee72033 | 3669 | doc: /* Return t if OBJECT is an overlay. */) |
5842a27b | 3670 | (Lisp_Object object) |
52f8ec73 JB |
3671 | { |
3672 | return (OVERLAYP (object) ? Qt : Qnil); | |
3673 | } | |
3674 | ||
acac2700 | 3675 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 5, 0, |
7ee72033 | 3676 | doc: /* Create a new overlay with range BEG to END in BUFFER. |
018ba359 PJ |
3677 | If omitted, BUFFER defaults to the current buffer. |
3678 | BEG and END may be integers or markers. | |
a625ee20 RS |
3679 | The fourth arg FRONT-ADVANCE, if non-nil, makes the marker |
3680 | for the front of the overlay advance when text is inserted there | |
63af6055 | 3681 | \(which means the text *is not* included in the overlay). |
a625ee20 RS |
3682 | The fifth arg REAR-ADVANCE, if non-nil, makes the marker |
3683 | for the rear of the overlay advance when text is inserted there | |
63af6055 | 3684 | \(which means the text *is* included in the overlay). */) |
5842a27b | 3685 | (Lisp_Object beg, Lisp_Object end, Lisp_Object buffer, Lisp_Object front_advance, Lisp_Object rear_advance) |
2eec3b4e RS |
3686 | { |
3687 | Lisp_Object overlay; | |
5c4f68f1 | 3688 | struct buffer *b; |
2eec3b4e | 3689 | |
5c4f68f1 | 3690 | if (NILP (buffer)) |
67180c6a | 3691 | XSETBUFFER (buffer, current_buffer); |
883047b9 | 3692 | else |
b7826503 | 3693 | CHECK_BUFFER (buffer); |
883047b9 JB |
3694 | if (MARKERP (beg) |
3695 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3696 | error ("Marker points into wrong buffer"); | |
3697 | if (MARKERP (end) | |
3698 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3699 | error ("Marker points into wrong buffer"); | |
2eec3b4e | 3700 | |
b7826503 PJ |
3701 | CHECK_NUMBER_COERCE_MARKER (beg); |
3702 | CHECK_NUMBER_COERCE_MARKER (end); | |
5c4f68f1 | 3703 | |
883047b9 | 3704 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 3705 | { |
c99fc30f KH |
3706 | Lisp_Object temp; |
3707 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 3708 | } |
883047b9 JB |
3709 | |
3710 | b = XBUFFER (buffer); | |
3711 | ||
3712 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
3713 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 | 3714 | |
acac2700 RS |
3715 | if (!NILP (front_advance)) |
3716 | XMARKER (beg)->insertion_type = 1; | |
3717 | if (!NILP (rear_advance)) | |
3718 | XMARKER (end)->insertion_type = 1; | |
597dd755 | 3719 | |
48e2e3ba | 3720 | overlay = allocate_misc (); |
89ca3e1b | 3721 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; |
48e2e3ba KH |
3722 | XOVERLAY (overlay)->start = beg; |
3723 | XOVERLAY (overlay)->end = end; | |
3724 | XOVERLAY (overlay)->plist = Qnil; | |
2410d73a | 3725 | XOVERLAY (overlay)->next = NULL; |
2eec3b4e | 3726 | |
177c0ea7 | 3727 | /* Put the new overlay on the wrong list. */ |
2eec3b4e | 3728 | end = OVERLAY_END (overlay); |
c2d5b10f | 3729 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a SM |
3730 | { |
3731 | if (b->overlays_after) | |
3732 | XOVERLAY (overlay)->next = b->overlays_after; | |
3733 | b->overlays_after = XOVERLAY (overlay); | |
3734 | } | |
2eec3b4e | 3735 | else |
2410d73a SM |
3736 | { |
3737 | if (b->overlays_before) | |
3738 | XOVERLAY (overlay)->next = b->overlays_before; | |
3739 | b->overlays_before = XOVERLAY (overlay); | |
3740 | } | |
2eec3b4e RS |
3741 | |
3742 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3743 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3744 | |
b61982dd JB |
3745 | /* We don't need to redisplay the region covered by the overlay, because |
3746 | the overlay has no properties at the moment. */ | |
3747 | ||
2eec3b4e RS |
3748 | return overlay; |
3749 | } | |
876aa27c RS |
3750 | \f |
3751 | /* Mark a section of BUF as needing redisplay because of overlays changes. */ | |
3752 | ||
3753 | static void | |
d3da34e0 | 3754 | modify_overlay (struct buffer *buf, EMACS_INT start, EMACS_INT end) |
876aa27c | 3755 | { |
876aa27c RS |
3756 | if (start > end) |
3757 | { | |
3758 | int temp = start; | |
26f545d7 GM |
3759 | start = end; |
3760 | end = temp; | |
876aa27c RS |
3761 | } |
3762 | ||
481b5054 | 3763 | BUF_COMPUTE_UNCHANGED (buf, start, end); |
177c0ea7 | 3764 | |
876aa27c RS |
3765 | /* If this is a buffer not in the selected window, |
3766 | we must do other windows. */ | |
3767 | if (buf != XBUFFER (XWINDOW (selected_window)->buffer)) | |
3768 | windows_or_buffers_changed = 1; | |
876aa27c RS |
3769 | /* If multiple windows show this buffer, we must do other windows. */ |
3770 | else if (buffer_shared > 1) | |
3771 | windows_or_buffers_changed = 1; | |
18700091 KS |
3772 | /* If we modify an overlay at the end of the buffer, we cannot |
3773 | be sure that window end is still valid. */ | |
3774 | else if (end >= ZV && start <= ZV) | |
3775 | windows_or_buffers_changed = 1; | |
876aa27c | 3776 | |
d8b9150f | 3777 | ++BUF_OVERLAY_MODIFF (buf); |
876aa27c | 3778 | } |
2eec3b4e | 3779 | |
018ba359 | 3780 | \f |
d3da34e0 | 3781 | Lisp_Object Fdelete_overlay (Lisp_Object overlay); |
2e34157c | 3782 | |
2410d73a | 3783 | static struct Lisp_Overlay * |
d3da34e0 | 3784 | unchain_overlay (struct Lisp_Overlay *list, struct Lisp_Overlay *overlay) |
2410d73a SM |
3785 | { |
3786 | struct Lisp_Overlay *tmp, *prev; | |
3787 | for (tmp = list, prev = NULL; tmp; prev = tmp, tmp = tmp->next) | |
3788 | if (tmp == overlay) | |
3789 | { | |
3790 | if (prev) | |
3791 | prev->next = tmp->next; | |
3792 | else | |
3793 | list = tmp->next; | |
3794 | overlay->next = NULL; | |
3795 | break; | |
3796 | } | |
3797 | return list; | |
3798 | } | |
3799 | ||
5c4f68f1 | 3800 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
7ee72033 | 3801 | doc: /* Set the endpoints of OVERLAY to BEG and END in BUFFER. |
018ba359 PJ |
3802 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now. |
3803 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current | |
7ee72033 | 3804 | buffer. */) |
5842a27b | 3805 | (Lisp_Object overlay, Lisp_Object beg, Lisp_Object end, Lisp_Object buffer) |
2eec3b4e | 3806 | { |
0a4469c9 RS |
3807 | struct buffer *b, *ob; |
3808 | Lisp_Object obuffer; | |
aed13378 | 3809 | int count = SPECPDL_INDEX (); |
5c4f68f1 | 3810 | |
b7826503 | 3811 | CHECK_OVERLAY (overlay); |
5c4f68f1 JB |
3812 | if (NILP (buffer)) |
3813 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a | 3814 | if (NILP (buffer)) |
67180c6a | 3815 | XSETBUFFER (buffer, current_buffer); |
b7826503 | 3816 | CHECK_BUFFER (buffer); |
883047b9 JB |
3817 | |
3818 | if (MARKERP (beg) | |
3819 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3820 | error ("Marker points into wrong buffer"); | |
3821 | if (MARKERP (end) | |
3822 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3823 | error ("Marker points into wrong buffer"); | |
3824 | ||
b7826503 PJ |
3825 | CHECK_NUMBER_COERCE_MARKER (beg); |
3826 | CHECK_NUMBER_COERCE_MARKER (end); | |
b61982dd | 3827 | |
9d7608b7 KH |
3828 | if (XINT (beg) == XINT (end) && ! NILP (Foverlay_get (overlay, Qevaporate))) |
3829 | return Fdelete_overlay (overlay); | |
0a4469c9 | 3830 | |
b61982dd JB |
3831 | if (XINT (beg) > XINT (end)) |
3832 | { | |
c99fc30f KH |
3833 | Lisp_Object temp; |
3834 | temp = beg; beg = end; end = temp; | |
b61982dd JB |
3835 | } |
3836 | ||
9d7608b7 KH |
3837 | specbind (Qinhibit_quit, Qt); |
3838 | ||
0a4469c9 | 3839 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
5c4f68f1 | 3840 | b = XBUFFER (buffer); |
8801a864 | 3841 | ob = BUFFERP (obuffer) ? XBUFFER (obuffer) : (struct buffer *) 0; |
2eec3b4e | 3842 | |
c82ed728 | 3843 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 3844 | if (!EQ (buffer, obuffer)) |
50760c4a RS |
3845 | { |
3846 | /* Redisplay where the overlay was. */ | |
3847 | if (!NILP (obuffer)) | |
3848 | { | |
2e34157c RS |
3849 | int o_beg; |
3850 | int o_end; | |
50760c4a | 3851 | |
80509f2f RS |
3852 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3853 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
50760c4a | 3854 | |
2e34157c | 3855 | modify_overlay (ob, o_beg, o_end); |
50760c4a RS |
3856 | } |
3857 | ||
3858 | /* Redisplay where the overlay is going to be. */ | |
876aa27c | 3859 | modify_overlay (b, XINT (beg), XINT (end)); |
50760c4a | 3860 | } |
c82ed728 JB |
3861 | else |
3862 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
3863 | { | |
2e34157c | 3864 | int o_beg, o_end; |
c82ed728 | 3865 | |
80509f2f RS |
3866 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3867 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
c82ed728 | 3868 | |
2e34157c RS |
3869 | if (o_beg == XINT (beg)) |
3870 | modify_overlay (b, o_end, XINT (end)); | |
3871 | else if (o_end == XINT (end)) | |
3872 | modify_overlay (b, o_beg, XINT (beg)); | |
c82ed728 JB |
3873 | else |
3874 | { | |
2e34157c RS |
3875 | if (XINT (beg) < o_beg) o_beg = XINT (beg); |
3876 | if (XINT (end) > o_end) o_end = XINT (end); | |
3877 | modify_overlay (b, o_beg, o_end); | |
c82ed728 JB |
3878 | } |
3879 | } | |
b61982dd | 3880 | |
0a4469c9 RS |
3881 | if (!NILP (obuffer)) |
3882 | { | |
2410d73a SM |
3883 | ob->overlays_before |
3884 | = unchain_overlay (ob->overlays_before, XOVERLAY (overlay)); | |
3885 | ob->overlays_after | |
3886 | = unchain_overlay (ob->overlays_after, XOVERLAY (overlay)); | |
3887 | eassert (XOVERLAY (overlay)->next == NULL); | |
0a4469c9 | 3888 | } |
5c4f68f1 JB |
3889 | |
3890 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
3891 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
2eec3b4e | 3892 | |
177c0ea7 | 3893 | /* Put the overlay on the wrong list. */ |
2eec3b4e | 3894 | end = OVERLAY_END (overlay); |
c2d5b10f | 3895 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a | 3896 | { |
8f924df7 KH |
3897 | XOVERLAY (overlay)->next = b->overlays_after; |
3898 | b->overlays_after = XOVERLAY (overlay); | |
2410d73a | 3899 | } |
2eec3b4e | 3900 | else |
2410d73a | 3901 | { |
8f924df7 KH |
3902 | XOVERLAY (overlay)->next = b->overlays_before; |
3903 | b->overlays_before = XOVERLAY (overlay); | |
2410d73a | 3904 | } |
2eec3b4e RS |
3905 | |
3906 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3907 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3908 | |
0a4469c9 | 3909 | return unbind_to (count, overlay); |
2eec3b4e RS |
3910 | } |
3911 | ||
3912 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
7ee72033 | 3913 | doc: /* Delete the overlay OVERLAY from its buffer. */) |
5842a27b | 3914 | (Lisp_Object overlay) |
2eec3b4e | 3915 | { |
0a4469c9 | 3916 | Lisp_Object buffer; |
5c4f68f1 | 3917 | struct buffer *b; |
aed13378 | 3918 | int count = SPECPDL_INDEX (); |
5c4f68f1 | 3919 | |
b7826503 | 3920 | CHECK_OVERLAY (overlay); |
52f8ec73 | 3921 | |
0a4469c9 RS |
3922 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
3923 | if (NILP (buffer)) | |
3924 | return Qnil; | |
3925 | ||
3926 | b = XBUFFER (buffer); | |
0a4469c9 | 3927 | specbind (Qinhibit_quit, Qt); |
177c0ea7 | 3928 | |
2410d73a SM |
3929 | b->overlays_before = unchain_overlay (b->overlays_before,XOVERLAY (overlay)); |
3930 | b->overlays_after = unchain_overlay (b->overlays_after, XOVERLAY (overlay)); | |
3931 | eassert (XOVERLAY (overlay)->next == NULL); | |
876aa27c | 3932 | modify_overlay (b, |
8231a9aa RS |
3933 | marker_position (OVERLAY_START (overlay)), |
3934 | marker_position (OVERLAY_END (overlay))); | |
3ece337a JB |
3935 | Fset_marker (OVERLAY_START (overlay), Qnil, Qnil); |
3936 | Fset_marker (OVERLAY_END (overlay), Qnil, Qnil); | |
3937 | ||
e58c389d | 3938 | /* When deleting an overlay with before or after strings, turn off |
26f545d7 GM |
3939 | display optimizations for the affected buffer, on the basis that |
3940 | these strings may contain newlines. This is easier to do than to | |
3941 | check for that situation during redisplay. */ | |
3942 | if (!windows_or_buffers_changed | |
3943 | && (!NILP (Foverlay_get (overlay, Qbefore_string)) | |
3944 | || !NILP (Foverlay_get (overlay, Qafter_string)))) | |
3945 | b->prevent_redisplay_optimizations_p = 1; | |
3946 | ||
0a4469c9 | 3947 | return unbind_to (count, Qnil); |
2eec3b4e RS |
3948 | } |
3949 | \f | |
8ebafa8d JB |
3950 | /* Overlay dissection functions. */ |
3951 | ||
3952 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, | |
7ee72033 | 3953 | doc: /* Return the position at which OVERLAY starts. */) |
5842a27b | 3954 | (Lisp_Object overlay) |
8ebafa8d | 3955 | { |
b7826503 | 3956 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3957 | |
3958 | return (Fmarker_position (OVERLAY_START (overlay))); | |
3959 | } | |
3960 | ||
3961 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, | |
7ee72033 | 3962 | doc: /* Return the position at which OVERLAY ends. */) |
5842a27b | 3963 | (Lisp_Object overlay) |
8ebafa8d | 3964 | { |
b7826503 | 3965 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3966 | |
3967 | return (Fmarker_position (OVERLAY_END (overlay))); | |
3968 | } | |
3969 | ||
3970 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
563f7128 LK |
3971 | doc: /* Return the buffer OVERLAY belongs to. |
3972 | Return nil if OVERLAY has been deleted. */) | |
5842a27b | 3973 | (Lisp_Object overlay) |
8ebafa8d | 3974 | { |
b7826503 | 3975 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3976 | |
3977 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
3978 | } | |
3979 | ||
3980 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
7ee72033 | 3981 | doc: /* Return a list of the properties on OVERLAY. |
018ba359 | 3982 | This is a copy of OVERLAY's plist; modifying its conses has no effect on |
7ee72033 | 3983 | OVERLAY. */) |
5842a27b | 3984 | (Lisp_Object overlay) |
8ebafa8d | 3985 | { |
b7826503 | 3986 | CHECK_OVERLAY (overlay); |
8ebafa8d | 3987 | |
48e2e3ba | 3988 | return Fcopy_sequence (XOVERLAY (overlay)->plist); |
8ebafa8d JB |
3989 | } |
3990 | ||
3991 | \f | |
2eec3b4e | 3992 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
aabc29c8 | 3993 | doc: /* Return a list of the overlays that contain the character at POS. */) |
5842a27b | 3994 | (Lisp_Object pos) |
2eec3b4e RS |
3995 | { |
3996 | int noverlays; | |
2eec3b4e RS |
3997 | Lisp_Object *overlay_vec; |
3998 | int len; | |
3999 | Lisp_Object result; | |
4000 | ||
b7826503 | 4001 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
4002 | |
4003 | len = 10; | |
a9800ae8 | 4004 | /* We can't use alloca here because overlays_at can call xrealloc. */ |
2eec3b4e RS |
4005 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); |
4006 | ||
4007 | /* Put all the overlays we want in a vector in overlay_vec. | |
4008 | Store the length in len. */ | |
2a77a7d7 | 4009 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
0f8b27ea | 4010 | (EMACS_INT *) 0, (EMACS_INT *) 0, 0); |
2eec3b4e RS |
4011 | |
4012 | /* Make a list of them all. */ | |
4013 | result = Flist (noverlays, overlay_vec); | |
4014 | ||
9ac0d9e0 | 4015 | xfree (overlay_vec); |
2eec3b4e RS |
4016 | return result; |
4017 | } | |
4018 | ||
74514898 | 4019 | DEFUN ("overlays-in", Foverlays_in, Soverlays_in, 2, 2, 0, |
7ee72033 | 4020 | doc: /* Return a list of the overlays that overlap the region BEG ... END. |
018ba359 PJ |
4021 | Overlap means that at least one character is contained within the overlay |
4022 | and also contained within the specified region. | |
7723e095 MR |
4023 | Empty overlays are included in the result if they are located at BEG, |
4024 | between BEG and END, or at END provided END denotes the position at the | |
4025 | end of the buffer. */) | |
5842a27b | 4026 | (Lisp_Object beg, Lisp_Object end) |
74514898 RS |
4027 | { |
4028 | int noverlays; | |
4029 | Lisp_Object *overlay_vec; | |
4030 | int len; | |
4031 | Lisp_Object result; | |
4032 | ||
b7826503 PJ |
4033 | CHECK_NUMBER_COERCE_MARKER (beg); |
4034 | CHECK_NUMBER_COERCE_MARKER (end); | |
74514898 RS |
4035 | |
4036 | len = 10; | |
4037 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
4038 | ||
4039 | /* Put all the overlays we want in a vector in overlay_vec. | |
4040 | Store the length in len. */ | |
4041 | noverlays = overlays_in (XINT (beg), XINT (end), 1, &overlay_vec, &len, | |
4042 | (int *) 0, (int *) 0); | |
4043 | ||
4044 | /* Make a list of them all. */ | |
4045 | result = Flist (noverlays, overlay_vec); | |
4046 | ||
4047 | xfree (overlay_vec); | |
4048 | return result; | |
4049 | } | |
4050 | ||
2eec3b4e | 4051 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, |
efc7e75f | 4052 | 1, 1, 0, |
7ee72033 | 4053 | doc: /* Return the next position after POS where an overlay starts or ends. |
624d2678 RS |
4054 | If there are no overlay boundaries from POS to (point-max), |
4055 | the value is (point-max). */) | |
5842a27b | 4056 | (Lisp_Object pos) |
2eec3b4e RS |
4057 | { |
4058 | int noverlays; | |
0f8b27ea | 4059 | EMACS_INT endpos; |
2eec3b4e RS |
4060 | Lisp_Object *overlay_vec; |
4061 | int len; | |
2eec3b4e RS |
4062 | int i; |
4063 | ||
b7826503 | 4064 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
4065 | |
4066 | len = 10; | |
4067 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
4068 | ||
4069 | /* Put all the overlays we want in a vector in overlay_vec. | |
4070 | Store the length in len. | |
4071 | endpos gets the position where the next overlay starts. */ | |
2a77a7d7 | 4072 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
0f8b27ea | 4073 | &endpos, (EMACS_INT *) 0, 1); |
2eec3b4e RS |
4074 | |
4075 | /* If any of these overlays ends before endpos, | |
4076 | use its ending point instead. */ | |
4077 | for (i = 0; i < noverlays; i++) | |
4078 | { | |
4079 | Lisp_Object oend; | |
0f8b27ea | 4080 | EMACS_INT oendpos; |
2eec3b4e RS |
4081 | |
4082 | oend = OVERLAY_END (overlay_vec[i]); | |
4083 | oendpos = OVERLAY_POSITION (oend); | |
4084 | if (oendpos < endpos) | |
4085 | endpos = oendpos; | |
1ab256cb RM |
4086 | } |
4087 | ||
9ac0d9e0 | 4088 | xfree (overlay_vec); |
2eec3b4e RS |
4089 | return make_number (endpos); |
4090 | } | |
239c932b RS |
4091 | |
4092 | DEFUN ("previous-overlay-change", Fprevious_overlay_change, | |
4093 | Sprevious_overlay_change, 1, 1, 0, | |
7ee72033 | 4094 | doc: /* Return the previous position before POS where an overlay starts or ends. |
624d2678 RS |
4095 | If there are no overlay boundaries from (point-min) to POS, |
4096 | the value is (point-min). */) | |
5842a27b | 4097 | (Lisp_Object pos) |
239c932b RS |
4098 | { |
4099 | int noverlays; | |
0f8b27ea | 4100 | EMACS_INT prevpos; |
239c932b RS |
4101 | Lisp_Object *overlay_vec; |
4102 | int len; | |
239c932b | 4103 | |
b7826503 | 4104 | CHECK_NUMBER_COERCE_MARKER (pos); |
239c932b | 4105 | |
624bbdc4 RS |
4106 | /* At beginning of buffer, we know the answer; |
4107 | avoid bug subtracting 1 below. */ | |
4108 | if (XINT (pos) == BEGV) | |
4109 | return pos; | |
4110 | ||
017f0539 GM |
4111 | len = 10; |
4112 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
4113 | ||
239c932b RS |
4114 | /* Put all the overlays we want in a vector in overlay_vec. |
4115 | Store the length in len. | |
daa1c109 | 4116 | prevpos gets the position of the previous change. */ |
2a77a7d7 | 4117 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
0f8b27ea | 4118 | (EMACS_INT *) 0, &prevpos, 1); |
239c932b | 4119 | |
239c932b RS |
4120 | xfree (overlay_vec); |
4121 | return make_number (prevpos); | |
4122 | } | |
2eec3b4e RS |
4123 | \f |
4124 | /* These functions are for debugging overlays. */ | |
4125 | ||
4126 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
7ee72033 | 4127 | doc: /* Return a pair of lists giving all the overlays of the current buffer. |
018ba359 PJ |
4128 | The car has all the overlays before the overlay center; |
4129 | the cdr has all the overlays after the overlay center. | |
4130 | Recentering overlays moves overlays between these lists. | |
4131 | The lists you get are copies, so that changing them has no effect. | |
7ee72033 | 4132 | However, the overlays you get are the real objects that the buffer uses. */) |
5842a27b | 4133 | (void) |
2eec3b4e | 4134 | { |
2410d73a SM |
4135 | struct Lisp_Overlay *ol; |
4136 | Lisp_Object before = Qnil, after = Qnil, tmp; | |
4137 | for (ol = current_buffer->overlays_before; ol; ol = ol->next) | |
4138 | { | |
4139 | XSETMISC (tmp, ol); | |
4140 | before = Fcons (tmp, before); | |
4141 | } | |
4142 | for (ol = current_buffer->overlays_after; ol; ol = ol->next) | |
4143 | { | |
4144 | XSETMISC (tmp, ol); | |
4145 | after = Fcons (tmp, after); | |
4146 | } | |
4147 | return Fcons (Fnreverse (before), Fnreverse (after)); | |
2eec3b4e RS |
4148 | } |
4149 | ||
4150 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
c87426c5 RS |
4151 | doc: /* Recenter the overlays of the current buffer around position POS. |
4152 | That makes overlay lookup faster for positions near POS (but perhaps slower | |
4153 | for positions far away from POS). */) | |
5842a27b | 4154 | (Lisp_Object pos) |
2eec3b4e | 4155 | { |
b7826503 | 4156 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e | 4157 | |
5c4f68f1 | 4158 | recenter_overlay_lists (current_buffer, XINT (pos)); |
2eec3b4e RS |
4159 | return Qnil; |
4160 | } | |
4161 | \f | |
4162 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, | |
7ee72033 | 4163 | doc: /* Get the property of overlay OVERLAY with property name PROP. */) |
5842a27b | 4164 | (Lisp_Object overlay, Lisp_Object prop) |
2eec3b4e | 4165 | { |
b7826503 | 4166 | CHECK_OVERLAY (overlay); |
9a593927 | 4167 | return lookup_char_property (XOVERLAY (overlay)->plist, prop, 0); |
2eec3b4e RS |
4168 | } |
4169 | ||
4170 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
7ee72033 | 4171 | doc: /* Set one property of overlay OVERLAY: give property PROP value VALUE. */) |
5842a27b | 4172 | (Lisp_Object overlay, Lisp_Object prop, Lisp_Object value) |
2eec3b4e | 4173 | { |
48e2e3ba | 4174 | Lisp_Object tail, buffer; |
9d7608b7 | 4175 | int changed; |
2eec3b4e | 4176 | |
b7826503 | 4177 | CHECK_OVERLAY (overlay); |
b61982dd | 4178 | |
274a9425 RS |
4179 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
4180 | ||
48e2e3ba | 4181 | for (tail = XOVERLAY (overlay)->plist; |
7539e11f KR |
4182 | CONSP (tail) && CONSP (XCDR (tail)); |
4183 | tail = XCDR (XCDR (tail))) | |
4184 | if (EQ (XCAR (tail), prop)) | |
274a9425 | 4185 | { |
7539e11f | 4186 | changed = !EQ (XCAR (XCDR (tail)), value); |
f3fbd155 | 4187 | XSETCAR (XCDR (tail), value); |
9d7608b7 | 4188 | goto found; |
274a9425 | 4189 | } |
9d7608b7 KH |
4190 | /* It wasn't in the list, so add it to the front. */ |
4191 | changed = !NILP (value); | |
48e2e3ba KH |
4192 | XOVERLAY (overlay)->plist |
4193 | = Fcons (prop, Fcons (value, XOVERLAY (overlay)->plist)); | |
9d7608b7 KH |
4194 | found: |
4195 | if (! NILP (buffer)) | |
4196 | { | |
4197 | if (changed) | |
876aa27c | 4198 | modify_overlay (XBUFFER (buffer), |
26f545d7 GM |
4199 | marker_position (OVERLAY_START (overlay)), |
4200 | marker_position (OVERLAY_END (overlay))); | |
9d7608b7 KH |
4201 | if (EQ (prop, Qevaporate) && ! NILP (value) |
4202 | && (OVERLAY_POSITION (OVERLAY_START (overlay)) | |
4203 | == OVERLAY_POSITION (OVERLAY_END (overlay)))) | |
4204 | Fdelete_overlay (overlay); | |
4205 | } | |
7d63db98 | 4206 | |
2eec3b4e | 4207 | return value; |
1ab256cb RM |
4208 | } |
4209 | \f | |
9115729e KH |
4210 | /* Subroutine of report_overlay_modification. */ |
4211 | ||
4212 | /* Lisp vector holding overlay hook functions to call. | |
4213 | Vector elements come in pairs. | |
4214 | Each even-index element is a list of hook functions. | |
4215 | The following odd-index element is the overlay they came from. | |
4216 | ||
4217 | Before the buffer change, we fill in this vector | |
4218 | as we call overlay hook functions. | |
4219 | After the buffer change, we get the functions to call from this vector. | |
4220 | This way we always call the same functions before and after the change. */ | |
4221 | static Lisp_Object last_overlay_modification_hooks; | |
4222 | ||
4223 | /* Number of elements actually used in last_overlay_modification_hooks. */ | |
4224 | static int last_overlay_modification_hooks_used; | |
4225 | ||
4226 | /* Add one functionlist/overlay pair | |
4227 | to the end of last_overlay_modification_hooks. */ | |
4228 | ||
4229 | static void | |
d3da34e0 | 4230 | add_overlay_mod_hooklist (Lisp_Object functionlist, Lisp_Object overlay) |
9115729e KH |
4231 | { |
4232 | int oldsize = XVECTOR (last_overlay_modification_hooks)->size; | |
4233 | ||
4234 | if (last_overlay_modification_hooks_used == oldsize) | |
409f2919 | 4235 | last_overlay_modification_hooks = larger_vector |
de0280a2 | 4236 | (last_overlay_modification_hooks, oldsize * 2, Qnil); |
3ae565b3 SM |
4237 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, |
4238 | functionlist); last_overlay_modification_hooks_used++; | |
4239 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, | |
4240 | overlay); last_overlay_modification_hooks_used++; | |
9115729e KH |
4241 | } |
4242 | \f | |
173f2a64 RS |
4243 | /* Run the modification-hooks of overlays that include |
4244 | any part of the text in START to END. | |
9115729e KH |
4245 | If this change is an insertion, also |
4246 | run the insert-before-hooks of overlay starting at END, | |
930a9140 RS |
4247 | and the insert-after-hooks of overlay ending at START. |
4248 | ||
4249 | This is called both before and after the modification. | |
4250 | AFTER is nonzero when we call after the modification. | |
4251 | ||
9115729e KH |
4252 | ARG1, ARG2, ARG3 are arguments to pass to the hook functions. |
4253 | When AFTER is nonzero, they are the start position, | |
4254 | the position after the inserted new text, | |
4255 | and the length of deleted or replaced old text. */ | |
173f2a64 RS |
4256 | |
4257 | void | |
d3da34e0 JB |
4258 | report_overlay_modification (Lisp_Object start, Lisp_Object end, int after, |
4259 | Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3) | |
173f2a64 | 4260 | { |
2410d73a SM |
4261 | Lisp_Object prop, overlay; |
4262 | struct Lisp_Overlay *tail; | |
9115729e KH |
4263 | /* 1 if this change is an insertion. */ |
4264 | int insertion = (after ? XFASTINT (arg3) == 0 : EQ (start, end)); | |
a615c6dc | 4265 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
55b48893 RS |
4266 | |
4267 | overlay = Qnil; | |
2410d73a | 4268 | tail = NULL; |
9115729e | 4269 | |
27c6b98e SM |
4270 | /* We used to run the functions as soon as we found them and only register |
4271 | them in last_overlay_modification_hooks for the purpose of the `after' | |
4272 | case. But running elisp code as we traverse the list of overlays is | |
4273 | painful because the list can be modified by the elisp code so we had to | |
4274 | copy at several places. We now simply do a read-only traversal that | |
4275 | only collects the functions to run and we run them afterwards. It's | |
4276 | simpler, especially since all the code was already there. -stef */ | |
4277 | ||
a615c6dc | 4278 | if (!after) |
173f2a64 | 4279 | { |
a615c6dc SM |
4280 | /* We are being called before a change. |
4281 | Scan the overlays to find the functions to call. */ | |
4282 | last_overlay_modification_hooks_used = 0; | |
2410d73a | 4283 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
173f2a64 | 4284 | { |
a615c6dc SM |
4285 | int startpos, endpos; |
4286 | Lisp_Object ostart, oend; | |
4287 | ||
2410d73a | 4288 | XSETMISC (overlay, tail); |
a615c6dc SM |
4289 | |
4290 | ostart = OVERLAY_START (overlay); | |
4291 | oend = OVERLAY_END (overlay); | |
4292 | endpos = OVERLAY_POSITION (oend); | |
4293 | if (XFASTINT (start) > endpos) | |
4294 | break; | |
4295 | startpos = OVERLAY_POSITION (ostart); | |
4296 | if (insertion && (XFASTINT (start) == startpos | |
4297 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4298 | { |
a615c6dc SM |
4299 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4300 | if (!NILP (prop)) | |
4301 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4302 | } |
a615c6dc SM |
4303 | if (insertion && (XFASTINT (start) == endpos |
4304 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4305 | { |
a615c6dc SM |
4306 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4307 | if (!NILP (prop)) | |
4308 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4309 | } |
a615c6dc SM |
4310 | /* Test for intersecting intervals. This does the right thing |
4311 | for both insertion and deletion. */ | |
4312 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4313 | { |
a615c6dc SM |
4314 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4315 | if (!NILP (prop)) | |
4316 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4317 | } |
173f2a64 | 4318 | } |
60ebfdf3 | 4319 | |
2410d73a | 4320 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
173f2a64 | 4321 | { |
a615c6dc SM |
4322 | int startpos, endpos; |
4323 | Lisp_Object ostart, oend; | |
4324 | ||
2410d73a | 4325 | XSETMISC (overlay, tail); |
a615c6dc SM |
4326 | |
4327 | ostart = OVERLAY_START (overlay); | |
4328 | oend = OVERLAY_END (overlay); | |
4329 | startpos = OVERLAY_POSITION (ostart); | |
4330 | endpos = OVERLAY_POSITION (oend); | |
4331 | if (XFASTINT (end) < startpos) | |
4332 | break; | |
4333 | if (insertion && (XFASTINT (start) == startpos | |
4334 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4335 | { |
a615c6dc SM |
4336 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4337 | if (!NILP (prop)) | |
4338 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4339 | } |
a615c6dc SM |
4340 | if (insertion && (XFASTINT (start) == endpos |
4341 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4342 | { |
a615c6dc SM |
4343 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4344 | if (!NILP (prop)) | |
4345 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4346 | } |
a615c6dc SM |
4347 | /* Test for intersecting intervals. This does the right thing |
4348 | for both insertion and deletion. */ | |
4349 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4350 | { |
a615c6dc SM |
4351 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4352 | if (!NILP (prop)) | |
4353 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4354 | } |
173f2a64 RS |
4355 | } |
4356 | } | |
55b48893 | 4357 | |
a615c6dc SM |
4358 | GCPRO4 (overlay, arg1, arg2, arg3); |
4359 | { | |
4360 | /* Call the functions recorded in last_overlay_modification_hooks. | |
4361 | First copy the vector contents, in case some of these hooks | |
4362 | do subsequent modification of the buffer. */ | |
4363 | int size = last_overlay_modification_hooks_used; | |
4364 | Lisp_Object *copy = (Lisp_Object *) alloca (size * sizeof (Lisp_Object)); | |
4365 | int i; | |
4366 | ||
72af86bd AS |
4367 | memcpy (copy, XVECTOR (last_overlay_modification_hooks)->contents, |
4368 | size * sizeof (Lisp_Object)); | |
a615c6dc SM |
4369 | gcpro1.var = copy; |
4370 | gcpro1.nvars = size; | |
4371 | ||
4372 | for (i = 0; i < size;) | |
4373 | { | |
4374 | Lisp_Object prop, overlay; | |
4375 | prop = copy[i++]; | |
4376 | overlay = copy[i++]; | |
4377 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); | |
4378 | } | |
4379 | } | |
55b48893 | 4380 | UNGCPRO; |
173f2a64 RS |
4381 | } |
4382 | ||
4383 | static void | |
d3da34e0 JB |
4384 | call_overlay_mod_hooks (Lisp_Object list, Lisp_Object overlay, int after, |
4385 | Lisp_Object arg1, Lisp_Object arg2, Lisp_Object arg3) | |
173f2a64 | 4386 | { |
930a9140 | 4387 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
9115729e | 4388 | |
930a9140 | 4389 | GCPRO4 (list, arg1, arg2, arg3); |
9115729e | 4390 | |
6d70a280 | 4391 | while (CONSP (list)) |
173f2a64 | 4392 | { |
930a9140 | 4393 | if (NILP (arg3)) |
6d70a280 | 4394 | call4 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2); |
930a9140 | 4395 | else |
6d70a280 SM |
4396 | call5 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2, arg3); |
4397 | list = XCDR (list); | |
173f2a64 RS |
4398 | } |
4399 | UNGCPRO; | |
4400 | } | |
9d7608b7 KH |
4401 | |
4402 | /* Delete any zero-sized overlays at position POS, if the `evaporate' | |
4403 | property is set. */ | |
4404 | void | |
d3da34e0 | 4405 | evaporate_overlays (EMACS_INT pos) |
9d7608b7 | 4406 | { |
2410d73a SM |
4407 | Lisp_Object overlay, hit_list; |
4408 | struct Lisp_Overlay *tail; | |
9d7608b7 KH |
4409 | |
4410 | hit_list = Qnil; | |
c2d5b10f | 4411 | if (pos <= current_buffer->overlay_center) |
2410d73a | 4412 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
9d7608b7 KH |
4413 | { |
4414 | int endpos; | |
2410d73a | 4415 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4416 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
4417 | if (endpos < pos) | |
4418 | break; | |
4419 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos | |
c3935f9d | 4420 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4421 | hit_list = Fcons (overlay, hit_list); |
4422 | } | |
4423 | else | |
2410d73a | 4424 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
9d7608b7 KH |
4425 | { |
4426 | int startpos; | |
2410d73a | 4427 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4428 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
4429 | if (startpos > pos) | |
4430 | break; | |
4431 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos | |
c3935f9d | 4432 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4433 | hit_list = Fcons (overlay, hit_list); |
4434 | } | |
7539e11f KR |
4435 | for (; CONSP (hit_list); hit_list = XCDR (hit_list)) |
4436 | Fdelete_overlay (XCAR (hit_list)); | |
9d7608b7 | 4437 | } |
173f2a64 | 4438 | \f |
54dfdeb0 | 4439 | /* Somebody has tried to store a value with an unacceptable type |
1bf08baf KH |
4440 | in the slot with offset OFFSET. */ |
4441 | ||
0fa3ba92 | 4442 | void |
d3da34e0 | 4443 | buffer_slot_type_mismatch (Lisp_Object newval, int type) |
0fa3ba92 | 4444 | { |
ad97b375 | 4445 | Lisp_Object predicate; |
177c0ea7 | 4446 | |
64e16c3c | 4447 | switch (type) |
0fa3ba92 | 4448 | { |
2de9f71c | 4449 | case_Lisp_Int: predicate = Qintegerp; break; |
ad97b375 SM |
4450 | case Lisp_String: predicate = Qstringp; break; |
4451 | case Lisp_Symbol: predicate = Qsymbolp; break; | |
4452 | default: abort (); | |
0fa3ba92 JB |
4453 | } |
4454 | ||
ad97b375 | 4455 | wrong_type_argument (predicate, newval); |
0fa3ba92 | 4456 | } |
7c02e886 | 4457 | |
0fa3ba92 | 4458 | \f |
b86af064 GM |
4459 | /*********************************************************************** |
4460 | Allocation with mmap | |
4461 | ***********************************************************************/ | |
4462 | ||
4463 | #ifdef USE_MMAP_FOR_BUFFERS | |
4464 | ||
4465 | #include <sys/types.h> | |
4466 | #include <sys/mman.h> | |
4467 | ||
4468 | #ifndef MAP_ANON | |
4469 | #ifdef MAP_ANONYMOUS | |
4470 | #define MAP_ANON MAP_ANONYMOUS | |
4471 | #else | |
4472 | #define MAP_ANON 0 | |
4473 | #endif | |
4474 | #endif | |
4475 | ||
09dfdf85 GM |
4476 | #ifndef MAP_FAILED |
4477 | #define MAP_FAILED ((void *) -1) | |
4478 | #endif | |
4479 | ||
b86af064 | 4480 | #include <stdio.h> |
b86af064 GM |
4481 | |
4482 | #if MAP_ANON == 0 | |
4483 | #include <fcntl.h> | |
4484 | #endif | |
4485 | ||
4486 | #include "coding.h" | |
4487 | ||
4488 | ||
4489 | /* Memory is allocated in regions which are mapped using mmap(2). | |
4490 | The current implementation lets the system select mapped | |
4491 | addresses; we're not using MAP_FIXED in general, except when | |
4492 | trying to enlarge regions. | |
4493 | ||
4494 | Each mapped region starts with a mmap_region structure, the user | |
4495 | area starts after that structure, aligned to MEM_ALIGN. | |
4496 | ||
4497 | +-----------------------+ | |
4498 | | struct mmap_info + | | |
4499 | | padding | | |
4500 | +-----------------------+ | |
4501 | | user data | | |
4502 | | | | |
4503 | | | | |
4504 | +-----------------------+ */ | |
4505 | ||
4506 | struct mmap_region | |
4507 | { | |
4508 | /* User-specified size. */ | |
4509 | size_t nbytes_specified; | |
177c0ea7 | 4510 | |
b86af064 GM |
4511 | /* Number of bytes mapped */ |
4512 | size_t nbytes_mapped; | |
4513 | ||
4514 | /* Pointer to the location holding the address of the memory | |
4515 | allocated with the mmap'd block. The variable actually points | |
4516 | after this structure. */ | |
4517 | POINTER_TYPE **var; | |
4518 | ||
4519 | /* Next and previous in list of all mmap'd regions. */ | |
4520 | struct mmap_region *next, *prev; | |
4521 | }; | |
4522 | ||
4523 | /* Doubly-linked list of mmap'd regions. */ | |
4524 | ||
4525 | static struct mmap_region *mmap_regions; | |
4526 | ||
4527 | /* File descriptor for mmap. If we don't have anonymous mapping, | |
4528 | /dev/zero will be opened on it. */ | |
4529 | ||
4530 | static int mmap_fd; | |
4531 | ||
4532 | /* Temporary storage for mmap_set_vars, see there. */ | |
4533 | ||
4534 | static struct mmap_region *mmap_regions_1; | |
4535 | static int mmap_fd_1; | |
4536 | ||
4537 | /* Page size on this system. */ | |
4538 | ||
4539 | static int mmap_page_size; | |
4540 | ||
4541 | /* 1 means mmap has been intialized. */ | |
4542 | ||
4543 | static int mmap_initialized_p; | |
4544 | ||
4545 | /* Value is X rounded up to the next multiple of N. */ | |
4546 | ||
4547 | #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N)) | |
4548 | ||
4549 | /* Size of mmap_region structure plus padding. */ | |
4550 | ||
4551 | #define MMAP_REGION_STRUCT_SIZE \ | |
4552 | ROUND (sizeof (struct mmap_region), MEM_ALIGN) | |
4553 | ||
4554 | /* Given a pointer P to the start of the user-visible part of a mapped | |
4555 | region, return a pointer to the start of the region. */ | |
4556 | ||
4557 | #define MMAP_REGION(P) \ | |
4558 | ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE)) | |
4559 | ||
4560 | /* Given a pointer P to the start of a mapped region, return a pointer | |
4561 | to the start of the user-visible part of the region. */ | |
4562 | ||
4563 | #define MMAP_USER_AREA(P) \ | |
4564 | ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE)) | |
4565 | ||
4566 | #define MEM_ALIGN sizeof (double) | |
4567 | ||
7273faa1 DL |
4568 | /* Predicate returning true if part of the address range [START .. END] |
4569 | is currently mapped. Used to prevent overwriting an existing | |
08327b22 GM |
4570 | memory mapping. |
4571 | ||
4572 | Default is to conservativly assume the address range is occupied by | |
4573 | something else. This can be overridden by system configuration | |
4574 | files if system-specific means to determine this exists. */ | |
4575 | ||
4576 | #ifndef MMAP_ALLOCATED_P | |
4577 | #define MMAP_ALLOCATED_P(start, end) 1 | |
4578 | #endif | |
4579 | ||
b86af064 GM |
4580 | /* Function prototypes. */ |
4581 | ||
f57e2426 J |
4582 | static int mmap_free_1 (struct mmap_region *); |
4583 | static int mmap_enlarge (struct mmap_region *, int); | |
4584 | static struct mmap_region *mmap_find (POINTER_TYPE *, POINTER_TYPE *); | |
4585 | static POINTER_TYPE *mmap_alloc (POINTER_TYPE **, size_t); | |
4586 | static POINTER_TYPE *mmap_realloc (POINTER_TYPE **, size_t); | |
4587 | static void mmap_free (POINTER_TYPE **ptr); | |
4588 | static void mmap_init (void); | |
b86af064 GM |
4589 | |
4590 | ||
4591 | /* Return a region overlapping address range START...END, or null if | |
4592 | none. END is not including, i.e. the last byte in the range | |
4593 | is at END - 1. */ | |
4594 | ||
4595 | static struct mmap_region * | |
4596 | mmap_find (start, end) | |
4597 | POINTER_TYPE *start, *end; | |
4598 | { | |
4599 | struct mmap_region *r; | |
4600 | char *s = (char *) start, *e = (char *) end; | |
177c0ea7 | 4601 | |
b86af064 GM |
4602 | for (r = mmap_regions; r; r = r->next) |
4603 | { | |
4604 | char *rstart = (char *) r; | |
4605 | char *rend = rstart + r->nbytes_mapped; | |
4606 | ||
4607 | if (/* First byte of range, i.e. START, in this region? */ | |
4608 | (s >= rstart && s < rend) | |
4609 | /* Last byte of range, i.e. END - 1, in this region? */ | |
4610 | || (e > rstart && e <= rend) | |
4611 | /* First byte of this region in the range? */ | |
4612 | || (rstart >= s && rstart < e) | |
4613 | /* Last byte of this region in the range? */ | |
4614 | || (rend > s && rend <= e)) | |
4615 | break; | |
4616 | } | |
4617 | ||
4618 | return r; | |
4619 | } | |
4620 | ||
4621 | ||
4622 | /* Unmap a region. P is a pointer to the start of the user-araa of | |
4623 | the region. Value is non-zero if successful. */ | |
4624 | ||
4625 | static int | |
4626 | mmap_free_1 (r) | |
4627 | struct mmap_region *r; | |
4628 | { | |
4629 | if (r->next) | |
4630 | r->next->prev = r->prev; | |
4631 | if (r->prev) | |
4632 | r->prev->next = r->next; | |
4633 | else | |
4634 | mmap_regions = r->next; | |
177c0ea7 | 4635 | |
1a15cca0 | 4636 | if (munmap ((POINTER_TYPE *) r, r->nbytes_mapped) == -1) |
b86af064 GM |
4637 | { |
4638 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4639 | return 0; | |
4640 | } | |
4641 | ||
4642 | return 1; | |
4643 | } | |
4644 | ||
4645 | ||
4646 | /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R. | |
4647 | Value is non-zero if successful. */ | |
4648 | ||
4649 | static int | |
4650 | mmap_enlarge (r, npages) | |
4651 | struct mmap_region *r; | |
4652 | int npages; | |
4653 | { | |
4654 | char *region_end = (char *) r + r->nbytes_mapped; | |
4655 | size_t nbytes; | |
4656 | int success = 0; | |
4657 | ||
4658 | if (npages < 0) | |
4659 | { | |
4660 | /* Unmap pages at the end of the region. */ | |
4661 | nbytes = - npages * mmap_page_size; | |
4662 | if (munmap (region_end - nbytes, nbytes) == -1) | |
4663 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4664 | else | |
4665 | { | |
4666 | r->nbytes_mapped -= nbytes; | |
4667 | success = 1; | |
4668 | } | |
4669 | } | |
4670 | else if (npages > 0) | |
4671 | { | |
b86af064 | 4672 | nbytes = npages * mmap_page_size; |
177c0ea7 | 4673 | |
b86af064 GM |
4674 | /* Try to map additional pages at the end of the region. We |
4675 | cannot do this if the address range is already occupied by | |
4676 | something else because mmap deletes any previous mapping. | |
4677 | I'm not sure this is worth doing, let's see. */ | |
08327b22 | 4678 | if (!MMAP_ALLOCATED_P (region_end, region_end + nbytes)) |
b86af064 GM |
4679 | { |
4680 | POINTER_TYPE *p; | |
177c0ea7 | 4681 | |
b86af064 GM |
4682 | p = mmap (region_end, nbytes, PROT_READ | PROT_WRITE, |
4683 | MAP_ANON | MAP_PRIVATE | MAP_FIXED, mmap_fd, 0); | |
4684 | if (p == MAP_FAILED) | |
edaa9aed | 4685 | ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */ |
b86af064 GM |
4686 | else if (p != (POINTER_TYPE *) region_end) |
4687 | { | |
4688 | /* Kernels are free to choose a different address. In | |
4689 | that case, unmap what we've mapped above; we have | |
4690 | no use for it. */ | |
4691 | if (munmap (p, nbytes) == -1) | |
4692 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4693 | } | |
4694 | else | |
4695 | { | |
4696 | r->nbytes_mapped += nbytes; | |
4697 | success = 1; | |
4698 | } | |
4699 | } | |
4700 | } | |
4701 | ||
4702 | return success; | |
4703 | } | |
4704 | ||
4705 | ||
4706 | /* Set or reset variables holding references to mapped regions. If | |
4707 | RESTORE_P is zero, set all variables to null. If RESTORE_P is | |
4708 | non-zero, set all variables to the start of the user-areas | |
4709 | of mapped regions. | |
4710 | ||
4711 | This function is called from Fdump_emacs to ensure that the dumped | |
4712 | Emacs doesn't contain references to memory that won't be mapped | |
4713 | when Emacs starts. */ | |
4714 | ||
4715 | void | |
4716 | mmap_set_vars (restore_p) | |
4717 | int restore_p; | |
4718 | { | |
4719 | struct mmap_region *r; | |
4720 | ||
4721 | if (restore_p) | |
4722 | { | |
4723 | mmap_regions = mmap_regions_1; | |
4724 | mmap_fd = mmap_fd_1; | |
4725 | for (r = mmap_regions; r; r = r->next) | |
4726 | *r->var = MMAP_USER_AREA (r); | |
4727 | } | |
4728 | else | |
4729 | { | |
4730 | for (r = mmap_regions; r; r = r->next) | |
4731 | *r->var = NULL; | |
4732 | mmap_regions_1 = mmap_regions; | |
4733 | mmap_regions = NULL; | |
4734 | mmap_fd_1 = mmap_fd; | |
4735 | mmap_fd = -1; | |
4736 | } | |
4737 | } | |
4738 | ||
4739 | ||
4740 | /* Allocate a block of storage large enough to hold NBYTES bytes of | |
4741 | data. A pointer to the data is returned in *VAR. VAR is thus the | |
4742 | address of some variable which will use the data area. | |
4743 | ||
4744 | The allocation of 0 bytes is valid. | |
4745 | ||
4746 | If we can't allocate the necessary memory, set *VAR to null, and | |
4747 | return null. */ | |
4748 | ||
4749 | static POINTER_TYPE * | |
4750 | mmap_alloc (var, nbytes) | |
4751 | POINTER_TYPE **var; | |
4752 | size_t nbytes; | |
4753 | { | |
4754 | void *p; | |
4755 | size_t map; | |
4756 | ||
4757 | mmap_init (); | |
4758 | ||
4759 | map = ROUND (nbytes + MMAP_REGION_STRUCT_SIZE, mmap_page_size); | |
4760 | p = mmap (NULL, map, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, | |
4761 | mmap_fd, 0); | |
177c0ea7 | 4762 | |
b86af064 GM |
4763 | if (p == MAP_FAILED) |
4764 | { | |
4765 | if (errno != ENOMEM) | |
4766 | fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); | |
4767 | p = NULL; | |
4768 | } | |
4769 | else | |
4770 | { | |
4771 | struct mmap_region *r = (struct mmap_region *) p; | |
177c0ea7 | 4772 | |
b86af064 GM |
4773 | r->nbytes_specified = nbytes; |
4774 | r->nbytes_mapped = map; | |
4775 | r->var = var; | |
4776 | r->prev = NULL; | |
4777 | r->next = mmap_regions; | |
4778 | if (r->next) | |
4779 | r->next->prev = r; | |
4780 | mmap_regions = r; | |
177c0ea7 | 4781 | |
b86af064 GM |
4782 | p = MMAP_USER_AREA (p); |
4783 | } | |
177c0ea7 | 4784 | |
b86af064 GM |
4785 | return *var = p; |
4786 | } | |
4787 | ||
4788 | ||
4789 | /* Given a pointer at address VAR to data allocated with mmap_alloc, | |
4790 | resize it to size NBYTES. Change *VAR to reflect the new block, | |
4791 | and return this value. If more memory cannot be allocated, then | |
4792 | leave *VAR unchanged, and return null. */ | |
4793 | ||
4794 | static POINTER_TYPE * | |
4795 | mmap_realloc (var, nbytes) | |
4796 | POINTER_TYPE **var; | |
4797 | size_t nbytes; | |
4798 | { | |
4799 | POINTER_TYPE *result; | |
177c0ea7 | 4800 | |
b86af064 GM |
4801 | mmap_init (); |
4802 | ||
4803 | if (*var == NULL) | |
4804 | result = mmap_alloc (var, nbytes); | |
177c0ea7 | 4805 | else if (nbytes == 0) |
b86af064 GM |
4806 | { |
4807 | mmap_free (var); | |
4808 | result = mmap_alloc (var, nbytes); | |
4809 | } | |
4810 | else | |
4811 | { | |
4812 | struct mmap_region *r = MMAP_REGION (*var); | |
4813 | size_t room = r->nbytes_mapped - MMAP_REGION_STRUCT_SIZE; | |
177c0ea7 | 4814 | |
b86af064 GM |
4815 | if (room < nbytes) |
4816 | { | |
4817 | /* Must enlarge. */ | |
4818 | POINTER_TYPE *old_ptr = *var; | |
4819 | ||
4820 | /* Try to map additional pages at the end of the region. | |
4821 | If that fails, allocate a new region, copy data | |
4822 | from the old region, then free it. */ | |
4823 | if (mmap_enlarge (r, (ROUND (nbytes - room, mmap_page_size) | |
4824 | / mmap_page_size))) | |
4825 | { | |
4826 | r->nbytes_specified = nbytes; | |
4827 | *var = result = old_ptr; | |
4828 | } | |
4829 | else if (mmap_alloc (var, nbytes)) | |
4830 | { | |
72af86bd | 4831 | memcpy (*var, old_ptr, r->nbytes_specified); |
b86af064 GM |
4832 | mmap_free_1 (MMAP_REGION (old_ptr)); |
4833 | result = *var; | |
4834 | r = MMAP_REGION (result); | |
4835 | r->nbytes_specified = nbytes; | |
4836 | } | |
4837 | else | |
4838 | { | |
4839 | *var = old_ptr; | |
4840 | result = NULL; | |
4841 | } | |
4842 | } | |
4843 | else if (room - nbytes >= mmap_page_size) | |
4844 | { | |
4845 | /* Shrinking by at least a page. Let's give some | |
6bcdeb8c KR |
4846 | memory back to the system. |
4847 | ||
4848 | The extra parens are to make the division happens first, | |
4849 | on positive values, so we know it will round towards | |
4850 | zero. */ | |
bb63c5c9 | 4851 | mmap_enlarge (r, - ((room - nbytes) / mmap_page_size)); |
b86af064 GM |
4852 | result = *var; |
4853 | r->nbytes_specified = nbytes; | |
4854 | } | |
4855 | else | |
4856 | { | |
4857 | /* Leave it alone. */ | |
4858 | result = *var; | |
4859 | r->nbytes_specified = nbytes; | |
4860 | } | |
4861 | } | |
4862 | ||
4863 | return result; | |
4864 | } | |
4865 | ||
4866 | ||
4867 | /* Free a block of relocatable storage whose data is pointed to by | |
4868 | PTR. Store 0 in *PTR to show there's no block allocated. */ | |
4869 | ||
4870 | static void | |
4871 | mmap_free (var) | |
4872 | POINTER_TYPE **var; | |
4873 | { | |
4874 | mmap_init (); | |
177c0ea7 | 4875 | |
b86af064 GM |
4876 | if (*var) |
4877 | { | |
4878 | mmap_free_1 (MMAP_REGION (*var)); | |
4879 | *var = NULL; | |
4880 | } | |
4881 | } | |
4882 | ||
4883 | ||
4884 | /* Perform necessary intializations for the use of mmap. */ | |
4885 | ||
4886 | static void | |
4887 | mmap_init () | |
4888 | { | |
4889 | #if MAP_ANON == 0 | |
4890 | /* The value of mmap_fd is initially 0 in temacs, and -1 | |
4891 | in a dumped Emacs. */ | |
4892 | if (mmap_fd <= 0) | |
4893 | { | |
4894 | /* No anonymous mmap -- we need the file descriptor. */ | |
4895 | mmap_fd = open ("/dev/zero", O_RDONLY); | |
4896 | if (mmap_fd == -1) | |
4897 | fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno)); | |
4898 | } | |
4899 | #endif /* MAP_ANON == 0 */ | |
4900 | ||
4901 | if (mmap_initialized_p) | |
4902 | return; | |
4903 | mmap_initialized_p = 1; | |
177c0ea7 | 4904 | |
b86af064 GM |
4905 | #if MAP_ANON != 0 |
4906 | mmap_fd = -1; | |
4907 | #endif | |
177c0ea7 | 4908 | |
b86af064 GM |
4909 | mmap_page_size = getpagesize (); |
4910 | } | |
4911 | ||
4912 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
4913 | ||
4914 | ||
4915 | \f | |
4916 | /*********************************************************************** | |
4917 | Buffer-text Allocation | |
4918 | ***********************************************************************/ | |
4919 | ||
4920 | #ifdef REL_ALLOC | |
f57e2426 J |
4921 | extern POINTER_TYPE *r_alloc (POINTER_TYPE **, size_t); |
4922 | extern POINTER_TYPE *r_re_alloc (POINTER_TYPE **, size_t); | |
4923 | extern void r_alloc_free (POINTER_TYPE **ptr); | |
b86af064 GM |
4924 | #endif /* REL_ALLOC */ |
4925 | ||
4926 | ||
4927 | /* Allocate NBYTES bytes for buffer B's text buffer. */ | |
4928 | ||
4929 | static void | |
d3da34e0 | 4930 | alloc_buffer_text (struct buffer *b, size_t nbytes) |
b86af064 GM |
4931 | { |
4932 | POINTER_TYPE *p; | |
177c0ea7 | 4933 | |
b86af064 GM |
4934 | BLOCK_INPUT; |
4935 | #if defined USE_MMAP_FOR_BUFFERS | |
4936 | p = mmap_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4937 | #elif defined REL_ALLOC | |
4938 | p = r_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4939 | #else | |
815add84 | 4940 | p = xmalloc (nbytes); |
b86af064 | 4941 | #endif |
177c0ea7 | 4942 | |
b86af064 GM |
4943 | if (p == NULL) |
4944 | { | |
4945 | UNBLOCK_INPUT; | |
4946 | memory_full (); | |
4947 | } | |
4948 | ||
4949 | b->text->beg = (unsigned char *) p; | |
4950 | UNBLOCK_INPUT; | |
4951 | } | |
4952 | ||
4953 | /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means | |
4954 | shrink it. */ | |
4955 | ||
4956 | void | |
5371d722 | 4957 | enlarge_buffer_text (struct buffer *b, EMACS_INT delta) |
b86af064 GM |
4958 | { |
4959 | POINTER_TYPE *p; | |
4960 | size_t nbytes = (BUF_Z_BYTE (b) - BUF_BEG_BYTE (b) + BUF_GAP_SIZE (b) + 1 | |
4961 | + delta); | |
4962 | BLOCK_INPUT; | |
4963 | #if defined USE_MMAP_FOR_BUFFERS | |
4964 | p = mmap_realloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4965 | #elif defined REL_ALLOC | |
4966 | p = r_re_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4967 | #else | |
4968 | p = xrealloc (b->text->beg, nbytes); | |
4969 | #endif | |
177c0ea7 | 4970 | |
b86af064 GM |
4971 | if (p == NULL) |
4972 | { | |
4973 | UNBLOCK_INPUT; | |
4974 | memory_full (); | |
4975 | } | |
4976 | ||
4977 | BUF_BEG_ADDR (b) = (unsigned char *) p; | |
4978 | UNBLOCK_INPUT; | |
4979 | } | |
4980 | ||
4981 | ||
4982 | /* Free buffer B's text buffer. */ | |
4983 | ||
4984 | static void | |
d3da34e0 | 4985 | free_buffer_text (struct buffer *b) |
b86af064 GM |
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 |
d3da34e0 | 5008 | init_buffer_once (void) |
1ab256cb | 5009 | { |
7c02e886 GM |
5010 | int idx; |
5011 | ||
72af86bd | 5012 | memset (buffer_permanent_local_flags, 0, 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); | |
ce5b453a | 5017 | eassert (EQ (buffer_defaults.name, make_number (0))); |
13de9290 | 5018 | reset_buffer_local_variables (&buffer_defaults, 1); |
ce5b453a | 5019 | eassert (EQ (buffer_local_symbols.name, make_number (0))); |
1ab256cb | 5020 | reset_buffer (&buffer_local_symbols); |
13de9290 | 5021 | reset_buffer_local_variables (&buffer_local_symbols, 1); |
336cd056 RS |
5022 | /* Prevent GC from getting confused. */ |
5023 | buffer_defaults.text = &buffer_defaults.own_text; | |
5024 | buffer_local_symbols.text = &buffer_local_symbols.own_text; | |
336cd056 RS |
5025 | BUF_INTERVALS (&buffer_defaults) = 0; |
5026 | BUF_INTERVALS (&buffer_local_symbols) = 0; | |
cf00e751 | 5027 | XSETPVECTYPE (&buffer_defaults, PVEC_BUFFER); |
67180c6a | 5028 | XSETBUFFER (Vbuffer_defaults, &buffer_defaults); |
cf00e751 | 5029 | XSETPVECTYPE (&buffer_local_symbols, PVEC_BUFFER); |
67180c6a | 5030 | XSETBUFFER (Vbuffer_local_symbols, &buffer_local_symbols); |
1ab256cb RM |
5031 | |
5032 | /* Set up the default values of various buffer slots. */ | |
5033 | /* Must do these before making the first buffer! */ | |
5034 | ||
f532dca0 | 5035 | /* real setup is done in bindings.el */ |
d67b4f80 | 5036 | buffer_defaults.mode_line_format = make_pure_c_string ("%-"); |
045dee35 | 5037 | buffer_defaults.header_line_format = Qnil; |
1ab256cb RM |
5038 | buffer_defaults.abbrev_mode = Qnil; |
5039 | buffer_defaults.overwrite_mode = Qnil; | |
5040 | buffer_defaults.case_fold_search = Qt; | |
5041 | buffer_defaults.auto_fill_function = Qnil; | |
5042 | buffer_defaults.selective_display = Qnil; | |
5043 | #ifndef old | |
5044 | buffer_defaults.selective_display_ellipses = Qt; | |
5045 | #endif | |
5046 | buffer_defaults.abbrev_table = Qnil; | |
5047 | buffer_defaults.display_table = Qnil; | |
1ab256cb | 5048 | buffer_defaults.undo_list = Qnil; |
c48f61ef | 5049 | buffer_defaults.mark_active = Qnil; |
be9aafdd | 5050 | buffer_defaults.file_format = Qnil; |
71ed49fa | 5051 | buffer_defaults.auto_save_file_format = Qt; |
2410d73a SM |
5052 | buffer_defaults.overlays_before = NULL; |
5053 | buffer_defaults.overlays_after = NULL; | |
c2d5b10f | 5054 | buffer_defaults.overlay_center = BEG; |
1ab256cb | 5055 | |
8d7a4592 | 5056 | XSETFASTINT (buffer_defaults.tab_width, 8); |
1ab256cb | 5057 | buffer_defaults.truncate_lines = Qnil; |
0858cd02 | 5058 | buffer_defaults.word_wrap = Qnil; |
1ab256cb | 5059 | buffer_defaults.ctl_arrow = Qt; |
f44e260c | 5060 | buffer_defaults.bidi_display_reordering = Qnil; |
6c0cf218 | 5061 | buffer_defaults.bidi_paragraph_direction = Qnil; |
bb2ec976 | 5062 | buffer_defaults.cursor_type = Qt; |
a3bbced0 | 5063 | buffer_defaults.extra_line_spacing = Qnil; |
187ccf49 | 5064 | buffer_defaults.cursor_in_non_selected_windows = Qt; |
1ab256cb | 5065 | |
f7975d07 | 5066 | #ifdef DOS_NT |
0776cb1b | 5067 | buffer_defaults.buffer_file_type = Qnil; /* TEXT */ |
54ad07d3 | 5068 | #endif |
a1a17b61 | 5069 | buffer_defaults.enable_multibyte_characters = Qt; |
c71b5d9b | 5070 | buffer_defaults.buffer_file_coding_system = Qnil; |
8d7a4592 KH |
5071 | XSETFASTINT (buffer_defaults.fill_column, 70); |
5072 | XSETFASTINT (buffer_defaults.left_margin, 0); | |
28e969dd | 5073 | buffer_defaults.cache_long_line_scans = Qnil; |
f6ed2e84 | 5074 | buffer_defaults.file_truename = Qnil; |
7962a441 | 5075 | XSETFASTINT (buffer_defaults.display_count, 0); |
2ad8731a KS |
5076 | XSETFASTINT (buffer_defaults.left_margin_cols, 0); |
5077 | XSETFASTINT (buffer_defaults.right_margin_cols, 0); | |
5078 | buffer_defaults.left_fringe_width = Qnil; | |
5079 | buffer_defaults.right_fringe_width = Qnil; | |
5080 | buffer_defaults.fringes_outside_margins = Qnil; | |
5081 | buffer_defaults.scroll_bar_width = Qnil; | |
5082 | buffer_defaults.vertical_scroll_bar_type = Qt; | |
0552666b | 5083 | buffer_defaults.indicate_empty_lines = Qnil; |
6b61353c | 5084 | buffer_defaults.indicate_buffer_boundaries = Qnil; |
c6a46372 KS |
5085 | buffer_defaults.fringe_indicator_alist = Qnil; |
5086 | buffer_defaults.fringe_cursor_alist = Qnil; | |
0552666b GM |
5087 | buffer_defaults.scroll_up_aggressively = Qnil; |
5088 | buffer_defaults.scroll_down_aggressively = Qnil; | |
3fd364db | 5089 | buffer_defaults.display_time = Qnil; |
1ab256cb RM |
5090 | |
5091 | /* Assign the local-flags to the slots that have default values. | |
5092 | The local flag is a bit that is used in the buffer | |
5093 | to say that it has its own local value for the slot. | |
5094 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
5095 | ||
5096 | /* Nothing can work if this isn't true */ | |
4d2f1389 | 5097 | if (sizeof (EMACS_INT) != sizeof (Lisp_Object)) abort (); |
1ab256cb RM |
5098 | |
5099 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
72af86bd | 5100 | memset (&buffer_local_flags, 0, sizeof buffer_local_flags); |
aab80822 KH |
5101 | XSETINT (buffer_local_flags.filename, -1); |
5102 | XSETINT (buffer_local_flags.directory, -1); | |
5103 | XSETINT (buffer_local_flags.backed_up, -1); | |
5104 | XSETINT (buffer_local_flags.save_length, -1); | |
5105 | XSETINT (buffer_local_flags.auto_save_file_name, -1); | |
5106 | XSETINT (buffer_local_flags.read_only, -1); | |
5107 | XSETINT (buffer_local_flags.major_mode, -1); | |
5108 | XSETINT (buffer_local_flags.mode_name, -1); | |
5109 | XSETINT (buffer_local_flags.undo_list, -1); | |
5110 | XSETINT (buffer_local_flags.mark_active, -1); | |
943e065b | 5111 | XSETINT (buffer_local_flags.point_before_scroll, -1); |
f6ed2e84 | 5112 | XSETINT (buffer_local_flags.file_truename, -1); |
3cb719bd | 5113 | XSETINT (buffer_local_flags.invisibility_spec, -1); |
55ac8536 | 5114 | XSETINT (buffer_local_flags.file_format, -1); |
71ed49fa | 5115 | XSETINT (buffer_local_flags.auto_save_file_format, -1); |
7962a441 | 5116 | XSETINT (buffer_local_flags.display_count, -1); |
3fd364db | 5117 | XSETINT (buffer_local_flags.display_time, -1); |
1bf08baf | 5118 | XSETINT (buffer_local_flags.enable_multibyte_characters, -1); |
8d7a4592 | 5119 | |
7c02e886 GM |
5120 | idx = 1; |
5121 | XSETFASTINT (buffer_local_flags.mode_line_format, idx); ++idx; | |
5122 | XSETFASTINT (buffer_local_flags.abbrev_mode, idx); ++idx; | |
5123 | XSETFASTINT (buffer_local_flags.overwrite_mode, idx); ++idx; | |
5124 | XSETFASTINT (buffer_local_flags.case_fold_search, idx); ++idx; | |
5125 | XSETFASTINT (buffer_local_flags.auto_fill_function, idx); ++idx; | |
5126 | XSETFASTINT (buffer_local_flags.selective_display, idx); ++idx; | |
1ab256cb | 5127 | #ifndef old |
7c02e886 | 5128 | XSETFASTINT (buffer_local_flags.selective_display_ellipses, idx); ++idx; |
1ab256cb | 5129 | #endif |
7c02e886 GM |
5130 | XSETFASTINT (buffer_local_flags.tab_width, idx); ++idx; |
5131 | XSETFASTINT (buffer_local_flags.truncate_lines, idx); ++idx; | |
0858cd02 | 5132 | XSETFASTINT (buffer_local_flags.word_wrap, idx); ++idx; |
7c02e886 GM |
5133 | XSETFASTINT (buffer_local_flags.ctl_arrow, idx); ++idx; |
5134 | XSETFASTINT (buffer_local_flags.fill_column, idx); ++idx; | |
5135 | XSETFASTINT (buffer_local_flags.left_margin, idx); ++idx; | |
5136 | XSETFASTINT (buffer_local_flags.abbrev_table, idx); ++idx; | |
5137 | XSETFASTINT (buffer_local_flags.display_table, idx); ++idx; | |
f7975d07 | 5138 | #ifdef DOS_NT |
7c02e886 | 5139 | XSETFASTINT (buffer_local_flags.buffer_file_type, idx); |
13de9290 | 5140 | /* Make this one a permanent local. */ |
7c02e886 | 5141 | buffer_permanent_local_flags[idx++] = 1; |
54ad07d3 | 5142 | #endif |
7c02e886 GM |
5143 | XSETFASTINT (buffer_local_flags.syntax_table, idx); ++idx; |
5144 | XSETFASTINT (buffer_local_flags.cache_long_line_scans, idx); ++idx; | |
5145 | XSETFASTINT (buffer_local_flags.category_table, idx); ++idx; | |
f44e260c | 5146 | XSETFASTINT (buffer_local_flags.bidi_display_reordering, idx); ++idx; |
6c0cf218 | 5147 | XSETFASTINT (buffer_local_flags.bidi_paragraph_direction, idx); ++idx; |
177c0ea7 | 5148 | XSETFASTINT (buffer_local_flags.buffer_file_coding_system, idx); |
a1a17b61 | 5149 | /* Make this one a permanent local. */ |
7c02e886 | 5150 | buffer_permanent_local_flags[idx++] = 1; |
2ad8731a KS |
5151 | XSETFASTINT (buffer_local_flags.left_margin_cols, idx); ++idx; |
5152 | XSETFASTINT (buffer_local_flags.right_margin_cols, idx); ++idx; | |
5153 | XSETFASTINT (buffer_local_flags.left_fringe_width, idx); ++idx; | |
5154 | XSETFASTINT (buffer_local_flags.right_fringe_width, idx); ++idx; | |
5155 | XSETFASTINT (buffer_local_flags.fringes_outside_margins, idx); ++idx; | |
5156 | XSETFASTINT (buffer_local_flags.scroll_bar_width, idx); ++idx; | |
5157 | XSETFASTINT (buffer_local_flags.vertical_scroll_bar_type, idx); ++idx; | |
7c02e886 | 5158 | XSETFASTINT (buffer_local_flags.indicate_empty_lines, idx); ++idx; |
6b61353c | 5159 | XSETFASTINT (buffer_local_flags.indicate_buffer_boundaries, idx); ++idx; |
c6a46372 KS |
5160 | XSETFASTINT (buffer_local_flags.fringe_indicator_alist, idx); ++idx; |
5161 | XSETFASTINT (buffer_local_flags.fringe_cursor_alist, idx); ++idx; | |
7c02e886 GM |
5162 | XSETFASTINT (buffer_local_flags.scroll_up_aggressively, idx); ++idx; |
5163 | XSETFASTINT (buffer_local_flags.scroll_down_aggressively, idx); ++idx; | |
5164 | XSETFASTINT (buffer_local_flags.header_line_format, idx); ++idx; | |
bd96bd79 | 5165 | XSETFASTINT (buffer_local_flags.cursor_type, idx); ++idx; |
a3bbced0 | 5166 | XSETFASTINT (buffer_local_flags.extra_line_spacing, idx); ++idx; |
0124c5bd | 5167 | XSETFASTINT (buffer_local_flags.cursor_in_non_selected_windows, idx); ++idx; |
7c02e886 GM |
5168 | |
5169 | /* Need more room? */ | |
7313acd0 | 5170 | if (idx >= MAX_PER_BUFFER_VARS) |
7c02e886 | 5171 | abort (); |
7313acd0 | 5172 | last_per_buffer_idx = idx; |
177c0ea7 | 5173 | |
1ab256cb RM |
5174 | Vbuffer_alist = Qnil; |
5175 | current_buffer = 0; | |
5176 | all_buffers = 0; | |
5177 | ||
f4265f6c | 5178 | QSFundamental = make_pure_c_string ("Fundamental"); |
1ab256cb | 5179 | |
d67b4f80 | 5180 | Qfundamental_mode = intern_c_string ("fundamental-mode"); |
1ab256cb RM |
5181 | buffer_defaults.major_mode = Qfundamental_mode; |
5182 | ||
d67b4f80 | 5183 | Qmode_class = intern_c_string ("mode-class"); |
1ab256cb | 5184 | |
d67b4f80 | 5185 | Qprotected_field = intern_c_string ("protected-field"); |
1ab256cb | 5186 | |
d67b4f80 | 5187 | Qpermanent_local = intern_c_string ("permanent-local"); |
1ab256cb | 5188 | |
d67b4f80 | 5189 | Qkill_buffer_hook = intern_c_string ("kill-buffer-hook"); |
fd6cfe11 | 5190 | Fput (Qkill_buffer_hook, Qpermanent_local, Qt); |
1ab256cb | 5191 | |
d67b4f80 | 5192 | Qucs_set_table_for_input = intern_c_string ("ucs-set-table-for-input"); |
48265e61 | 5193 | |
1ab256cb | 5194 | /* super-magic invisible buffer */ |
d67b4f80 | 5195 | Vprin1_to_string_buffer = Fget_buffer_create (make_pure_c_string (" prin1")); |
1ab256cb RM |
5196 | Vbuffer_alist = Qnil; |
5197 | ||
d67b4f80 | 5198 | Fset_buffer (Fget_buffer_create (make_pure_c_string ("*scratch*"))); |
7775635d KH |
5199 | |
5200 | inhibit_modification_hooks = 0; | |
1ab256cb RM |
5201 | } |
5202 | ||
dfcf069d | 5203 | void |
d3da34e0 | 5204 | init_buffer (void) |
1ab256cb | 5205 | { |
2381d133 | 5206 | char *pwd; |
136351b7 | 5207 | Lisp_Object temp; |
b639c9be | 5208 | int len; |
1ab256cb | 5209 | |
b86af064 | 5210 | #ifdef USE_MMAP_FOR_BUFFERS |
93c27ef1 GM |
5211 | { |
5212 | /* When using the ralloc implementation based on mmap(2), buffer | |
5213 | text pointers will have been set to null in the dumped Emacs. | |
5214 | Map new memory. */ | |
5215 | struct buffer *b; | |
177c0ea7 | 5216 | |
93c27ef1 GM |
5217 | for (b = all_buffers; b; b = b->next) |
5218 | if (b->text->beg == NULL) | |
b86af064 | 5219 | enlarge_buffer_text (b, 0); |
93c27ef1 | 5220 | } |
b86af064 | 5221 | #endif /* USE_MMAP_FOR_BUFFERS */ |
177c0ea7 | 5222 | |
1ab256cb | 5223 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
3d871c85 RS |
5224 | if (NILP (buffer_defaults.enable_multibyte_characters)) |
5225 | Fset_buffer_multibyte (Qnil); | |
2381d133 | 5226 | |
01537133 | 5227 | pwd = get_current_dir_name (); |
a17b5ed1 | 5228 | |
156bdb41 | 5229 | if (!pwd) |
a17b5ed1 | 5230 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); |
1ab256cb | 5231 | |
1ab256cb RM |
5232 | /* Maybe this should really use some standard subroutine |
5233 | whose definition is filename syntax dependent. */ | |
b639c9be RF |
5234 | len = strlen (pwd); |
5235 | if (!(IS_DIRECTORY_SEP (pwd[len - 1]))) | |
f7975d07 | 5236 | { |
156bdb41 | 5237 | /* Grow buffer to add directory separator and '\0'. */ |
8b146312 AS |
5238 | pwd = (char *) realloc (pwd, len + 2); |
5239 | if (!pwd) | |
5240 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); | |
b639c9be RF |
5241 | pwd[len] = DIRECTORY_SEP; |
5242 | pwd[len + 1] = '\0'; | |
f7975d07 | 5243 | } |
0995fa35 | 5244 | |
01537133 | 5245 | current_buffer->directory = make_unibyte_string (pwd, strlen (pwd)); |
dcd74c5f | 5246 | if (! NILP (buffer_defaults.enable_multibyte_characters)) |
f9962371 | 5247 | /* At this moment, we still don't know how to decode the |
156bdb41 | 5248 | directory name. So, we keep the bytes in multibyte form so |
dcd74c5f KH |
5249 | that ENCODE_FILE correctly gets the original bytes. */ |
5250 | current_buffer->directory | |
5251 | = string_to_multibyte (current_buffer->directory); | |
136351b7 | 5252 | |
0995fa35 RS |
5253 | /* Add /: to the front of the name |
5254 | if it would otherwise be treated as magic. */ | |
5255 | temp = Ffind_file_name_handler (current_buffer->directory, Qt); | |
81ab2e07 KH |
5256 | if (! NILP (temp) |
5257 | /* If the default dir is just /, TEMP is non-nil | |
5258 | because of the ange-ftp completion handler. | |
5259 | However, it is not necessary to turn / into /:/. | |
5260 | So avoid doing that. */ | |
d5db4077 | 5261 | && strcmp ("/", SDATA (current_buffer->directory))) |
0995fa35 RS |
5262 | current_buffer->directory |
5263 | = concat2 (build_string ("/:"), current_buffer->directory); | |
5264 | ||
136351b7 RS |
5265 | temp = get_minibuffer (0); |
5266 | XBUFFER (temp)->directory = current_buffer->directory; | |
01537133 EZ |
5267 | |
5268 | free (pwd); | |
1ab256cb RM |
5269 | } |
5270 | ||
d6aa1876 SM |
5271 | /* Similar to defvar_lisp but define a variable whose value is the Lisp |
5272 | Object stored in the current buffer. address is the address of the slot | |
5273 | in the buffer that is current now. */ | |
5274 | ||
5275 | /* TYPE is nil for a general Lisp variable. | |
ce5b453a | 5276 | An integer specifies a type; then only Lisp values |
d6aa1876 | 5277 | with that type code are allowed (except that nil is allowed too). |
ce5b453a | 5278 | LNAME is the Lisp-level variable name. |
d6aa1876 SM |
5279 | VNAME is the name of the buffer slot. |
5280 | DOC is a dummy where you write the doc string as a comment. */ | |
ce5b453a SM |
5281 | #define DEFVAR_PER_BUFFER(lname, vname, type, doc) \ |
5282 | do { \ | |
5283 | static struct Lisp_Buffer_Objfwd bo_fwd; \ | |
5284 | defvar_per_buffer (&bo_fwd, lname, vname, type, 0); \ | |
5285 | } while (0) | |
d6aa1876 SM |
5286 | |
5287 | static void | |
d3da34e0 JB |
5288 | defvar_per_buffer (struct Lisp_Buffer_Objfwd *bo_fwd, char *namestring, |
5289 | Lisp_Object *address, Lisp_Object type, char *doc) | |
d6aa1876 | 5290 | { |
ce5b453a | 5291 | struct Lisp_Symbol *sym; |
d6aa1876 SM |
5292 | int offset; |
5293 | ||
ce5b453a | 5294 | sym = XSYMBOL (intern (namestring)); |
d6aa1876 SM |
5295 | offset = (char *)address - (char *)current_buffer; |
5296 | ||
ce5b453a SM |
5297 | bo_fwd->type = Lisp_Fwd_Buffer_Obj; |
5298 | bo_fwd->offset = offset; | |
5299 | bo_fwd->slottype = type; | |
5300 | sym->redirect = SYMBOL_FORWARDED; | |
5301 | { | |
5302 | /* I tried to do the job without a cast, but it seems impossible. | |
5303 | union Lisp_Fwd *fwd; &(fwd->u_buffer_objfwd) = bo_fwd; */ | |
5304 | SET_SYMBOL_FWD (sym, (union Lisp_Fwd *)bo_fwd); | |
5305 | } | |
5306 | XSETSYMBOL (PER_BUFFER_SYMBOL (offset), sym); | |
d6aa1876 SM |
5307 | |
5308 | if (PER_BUFFER_IDX (offset) == 0) | |
5309 | /* Did a DEFVAR_PER_BUFFER without initializing the corresponding | |
5310 | slot of buffer_local_flags */ | |
5311 | abort (); | |
5312 | } | |
5313 | ||
5314 | ||
1ab256cb | 5315 | /* initialize the buffer routines */ |
dfcf069d | 5316 | void |
d3da34e0 | 5317 | syms_of_buffer (void) |
1ab256cb | 5318 | { |
9115729e KH |
5319 | staticpro (&last_overlay_modification_hooks); |
5320 | last_overlay_modification_hooks | |
5321 | = Fmake_vector (make_number (10), Qnil); | |
5322 | ||
1ab256cb RM |
5323 | staticpro (&Vbuffer_defaults); |
5324 | staticpro (&Vbuffer_local_symbols); | |
5325 | staticpro (&Qfundamental_mode); | |
5326 | staticpro (&Qmode_class); | |
5327 | staticpro (&QSFundamental); | |
5328 | staticpro (&Vbuffer_alist); | |
5329 | staticpro (&Qprotected_field); | |
5330 | staticpro (&Qpermanent_local); | |
d67b4f80 | 5331 | Qpermanent_local_hook = intern_c_string ("permanent-local-hook"); |
2f7a359d | 5332 | staticpro (&Qpermanent_local_hook); |
1ab256cb | 5333 | staticpro (&Qkill_buffer_hook); |
d67b4f80 | 5334 | Qoverlayp = intern_c_string ("overlayp"); |
52f8ec73 | 5335 | staticpro (&Qoverlayp); |
d67b4f80 | 5336 | Qevaporate = intern_c_string ("evaporate"); |
9d7608b7 | 5337 | staticpro (&Qevaporate); |
d67b4f80 | 5338 | Qmodification_hooks = intern_c_string ("modification-hooks"); |
22378665 | 5339 | staticpro (&Qmodification_hooks); |
d67b4f80 | 5340 | Qinsert_in_front_hooks = intern_c_string ("insert-in-front-hooks"); |
22378665 | 5341 | staticpro (&Qinsert_in_front_hooks); |
d67b4f80 | 5342 | Qinsert_behind_hooks = intern_c_string ("insert-behind-hooks"); |
22378665 | 5343 | staticpro (&Qinsert_behind_hooks); |
d67b4f80 | 5344 | Qget_file_buffer = intern_c_string ("get-file-buffer"); |
22378665 | 5345 | staticpro (&Qget_file_buffer); |
d67b4f80 | 5346 | Qpriority = intern_c_string ("priority"); |
5985d248 | 5347 | staticpro (&Qpriority); |
d67b4f80 | 5348 | Qbefore_string = intern_c_string ("before-string"); |
bbbe9545 | 5349 | staticpro (&Qbefore_string); |
d67b4f80 | 5350 | Qafter_string = intern_c_string ("after-string"); |
bbbe9545 | 5351 | staticpro (&Qafter_string); |
d67b4f80 | 5352 | Qfirst_change_hook = intern_c_string ("first-change-hook"); |
22378665 | 5353 | staticpro (&Qfirst_change_hook); |
d67b4f80 | 5354 | Qbefore_change_functions = intern_c_string ("before-change-functions"); |
22378665 | 5355 | staticpro (&Qbefore_change_functions); |
d67b4f80 | 5356 | Qafter_change_functions = intern_c_string ("after-change-functions"); |
22378665 | 5357 | staticpro (&Qafter_change_functions); |
2f7a359d | 5358 | /* The next one is initialized in init_buffer_once. */ |
48265e61 | 5359 | staticpro (&Qucs_set_table_for_input); |
1ab256cb | 5360 | |
d67b4f80 | 5361 | Qkill_buffer_query_functions = intern_c_string ("kill-buffer-query-functions"); |
5b20caf0 RS |
5362 | staticpro (&Qkill_buffer_query_functions); |
5363 | ||
1ab256cb | 5364 | Fput (Qprotected_field, Qerror_conditions, |
d67b4f80 | 5365 | pure_cons (Qprotected_field, pure_cons (Qerror, Qnil))); |
1ab256cb | 5366 | Fput (Qprotected_field, Qerror_message, |
d67b4f80 | 5367 | make_pure_c_string ("Attempt to modify a protected field")); |
1ab256cb RM |
5368 | |
5369 | /* All these use DEFVAR_LISP_NOPRO because the slots in | |
5370 | buffer_defaults will all be marked via Vbuffer_defaults. */ | |
5371 | ||
5372 | DEFVAR_LISP_NOPRO ("default-mode-line-format", | |
7ee72033 MB |
5373 | &buffer_defaults.mode_line_format, |
5374 | doc: /* Default value of `mode-line-format' for buffers that don't override it. | |
018ba359 | 5375 | This is the same as (default-value 'mode-line-format). */); |
1ab256cb | 5376 | |
045dee35 | 5377 | DEFVAR_LISP_NOPRO ("default-header-line-format", |
7ee72033 MB |
5378 | &buffer_defaults.header_line_format, |
5379 | doc: /* Default value of `header-line-format' for buffers that don't override it. | |
018ba359 | 5380 | This is the same as (default-value 'header-line-format). */); |
0552666b | 5381 | |
7ee72033 MB |
5382 | DEFVAR_LISP_NOPRO ("default-cursor-type", &buffer_defaults.cursor_type, |
5383 | doc: /* Default value of `cursor-type' for buffers that don't override it. | |
018ba359 | 5384 | This is the same as (default-value 'cursor-type). */); |
bd96bd79 | 5385 | |
a3bbced0 | 5386 | DEFVAR_LISP_NOPRO ("default-line-spacing", |
7ee72033 MB |
5387 | &buffer_defaults.extra_line_spacing, |
5388 | doc: /* Default value of `line-spacing' for buffers that don't override it. | |
018ba359 | 5389 | This is the same as (default-value 'line-spacing). */); |
a3bbced0 | 5390 | |
187ccf49 KS |
5391 | DEFVAR_LISP_NOPRO ("default-cursor-in-non-selected-windows", |
5392 | &buffer_defaults.cursor_in_non_selected_windows, | |
5393 | doc: /* Default value of `cursor-in-non-selected-windows'. | |
5394 | This is the same as (default-value 'cursor-in-non-selected-windows). */); | |
5395 | ||
1ab256cb | 5396 | DEFVAR_LISP_NOPRO ("default-abbrev-mode", |
efc7e75f | 5397 | &buffer_defaults.abbrev_mode, |
7ee72033 | 5398 | doc: /* Default value of `abbrev-mode' for buffers that do not override it. |
018ba359 | 5399 | This is the same as (default-value 'abbrev-mode). */); |
1ab256cb RM |
5400 | |
5401 | DEFVAR_LISP_NOPRO ("default-ctl-arrow", | |
efc7e75f | 5402 | &buffer_defaults.ctl_arrow, |
7ee72033 | 5403 | doc: /* Default value of `ctl-arrow' for buffers that do not override it. |
018ba359 | 5404 | This is the same as (default-value 'ctl-arrow). */); |
1ab256cb | 5405 | |
5e2ad10b JB |
5406 | DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters", |
5407 | &buffer_defaults.enable_multibyte_characters, | |
5408 | doc: /* *Default value of `enable-multibyte-characters' for buffers not overriding it. | |
018ba359 | 5409 | This is the same as (default-value 'enable-multibyte-characters). */); |
177c0ea7 | 5410 | |
5e2ad10b JB |
5411 | DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system", |
5412 | &buffer_defaults.buffer_file_coding_system, | |
5413 | doc: /* Default value of `buffer-file-coding-system' for buffers not overriding it. | |
018ba359 | 5414 | This is the same as (default-value 'buffer-file-coding-system). */); |
177c0ea7 | 5415 | |
1ab256cb | 5416 | DEFVAR_LISP_NOPRO ("default-truncate-lines", |
efc7e75f PJ |
5417 | &buffer_defaults.truncate_lines, |
5418 | doc: /* Default value of `truncate-lines' for buffers that do not override it. | |
018ba359 | 5419 | This is the same as (default-value 'truncate-lines). */); |
1ab256cb RM |
5420 | |
5421 | DEFVAR_LISP_NOPRO ("default-fill-column", | |
efc7e75f PJ |
5422 | &buffer_defaults.fill_column, |
5423 | doc: /* Default value of `fill-column' for buffers that do not override it. | |
018ba359 | 5424 | This is the same as (default-value 'fill-column). */); |
1ab256cb RM |
5425 | |
5426 | DEFVAR_LISP_NOPRO ("default-left-margin", | |
efc7e75f PJ |
5427 | &buffer_defaults.left_margin, |
5428 | doc: /* Default value of `left-margin' for buffers that do not override it. | |
018ba359 | 5429 | This is the same as (default-value 'left-margin). */); |
1ab256cb RM |
5430 | |
5431 | DEFVAR_LISP_NOPRO ("default-tab-width", | |
bc0ede35 | 5432 | &buffer_defaults.tab_width, |
23625946 | 5433 | doc: /* Default value of `tab-width' for buffers that do not override it. |
018ba359 | 5434 | This is the same as (default-value 'tab-width). */); |
1ab256cb RM |
5435 | |
5436 | DEFVAR_LISP_NOPRO ("default-case-fold-search", | |
efc7e75f PJ |
5437 | &buffer_defaults.case_fold_search, |
5438 | doc: /* Default value of `case-fold-search' for buffers that don't override it. | |
018ba359 | 5439 | This is the same as (default-value 'case-fold-search). */); |
1ab256cb | 5440 | |
f7975d07 | 5441 | #ifdef DOS_NT |
177c0ea7 | 5442 | DEFVAR_LISP_NOPRO ("default-buffer-file-type", |
7ee72033 | 5443 | &buffer_defaults.buffer_file_type, |
efc7e75f | 5444 | doc: /* Default file type for buffers that do not override it. |
018ba359 PJ |
5445 | This is the same as (default-value 'buffer-file-type). |
5446 | The file type is nil for text, t for binary. */); | |
54ad07d3 RS |
5447 | #endif |
5448 | ||
0552666b | 5449 | DEFVAR_LISP_NOPRO ("default-left-margin-width", |
2ad8731a | 5450 | &buffer_defaults.left_margin_cols, |
efc7e75f | 5451 | doc: /* Default value of `left-margin-width' for buffers that don't override it. |
018ba359 | 5452 | This is the same as (default-value 'left-margin-width). */); |
0552666b GM |
5453 | |
5454 | DEFVAR_LISP_NOPRO ("default-right-margin-width", | |
2ad8731a KS |
5455 | &buffer_defaults.right_margin_cols, |
5456 | doc: /* Default value of `right-margin-width' for buffers that don't override it. | |
018ba359 | 5457 | This is the same as (default-value 'right-margin-width). */); |
177c0ea7 | 5458 | |
2ad8731a KS |
5459 | DEFVAR_LISP_NOPRO ("default-left-fringe-width", |
5460 | &buffer_defaults.left_fringe_width, | |
5461 | doc: /* Default value of `left-fringe-width' for buffers that don't override it. | |
5462 | This is the same as (default-value 'left-fringe-width). */); | |
5463 | ||
5464 | DEFVAR_LISP_NOPRO ("default-right-fringe-width", | |
5465 | &buffer_defaults.right_fringe_width, | |
5466 | doc: /* Default value of `right-fringe-width' for buffers that don't override it. | |
5467 | This is the same as (default-value 'right-fringe-width). */); | |
5468 | ||
5469 | DEFVAR_LISP_NOPRO ("default-fringes-outside-margins", | |
5470 | &buffer_defaults.fringes_outside_margins, | |
5471 | doc: /* Default value of `fringes-outside-margins' for buffers that don't override it. | |
5472 | This is the same as (default-value 'fringes-outside-margins). */); | |
5473 | ||
5474 | DEFVAR_LISP_NOPRO ("default-scroll-bar-width", | |
5475 | &buffer_defaults.scroll_bar_width, | |
5476 | doc: /* Default value of `scroll-bar-width' for buffers that don't override it. | |
5477 | This is the same as (default-value 'scroll-bar-width). */); | |
5478 | ||
5479 | DEFVAR_LISP_NOPRO ("default-vertical-scroll-bar", | |
5480 | &buffer_defaults.vertical_scroll_bar_type, | |
5481 | doc: /* Default value of `vertical-scroll-bar' for buffers that don't override it. | |
5482 | This is the same as (default-value 'vertical-scroll-bar). */); | |
5483 | ||
0552666b | 5484 | DEFVAR_LISP_NOPRO ("default-indicate-empty-lines", |
efc7e75f PJ |
5485 | &buffer_defaults.indicate_empty_lines, |
5486 | doc: /* Default value of `indicate-empty-lines' for buffers that don't override it. | |
018ba359 | 5487 | This is the same as (default-value 'indicate-empty-lines). */); |
177c0ea7 | 5488 | |
6b61353c KH |
5489 | DEFVAR_LISP_NOPRO ("default-indicate-buffer-boundaries", |
5490 | &buffer_defaults.indicate_buffer_boundaries, | |
5491 | doc: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it. | |
5492 | This is the same as (default-value 'indicate-buffer-boundaries). */); | |
5493 | ||
c6a46372 KS |
5494 | DEFVAR_LISP_NOPRO ("default-fringe-indicator-alist", |
5495 | &buffer_defaults.fringe_indicator_alist, | |
5496 | doc: /* Default value of `fringe-indicator-alist' for buffers that don't override it. | |
5497 | This is the same as (default-value 'fringe-indicator-alist'). */); | |
5498 | ||
5499 | DEFVAR_LISP_NOPRO ("default-fringe-cursor-alist", | |
5500 | &buffer_defaults.fringe_cursor_alist, | |
5501 | doc: /* Default value of `fringe-cursor-alist' for buffers that don't override it. | |
5502 | This is the same as (default-value 'fringe-cursor-alist'). */); | |
5503 | ||
0552666b | 5504 | DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively", |
efc7e75f | 5505 | &buffer_defaults.scroll_up_aggressively, |
7614d762 RS |
5506 | doc: /* Default value of `scroll-up-aggressively'. |
5507 | This value applies in buffers that don't have their own local values. | |
fc961256 | 5508 | This is the same as (default-value 'scroll-up-aggressively). */); |
177c0ea7 | 5509 | |
0552666b | 5510 | DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively", |
efc7e75f | 5511 | &buffer_defaults.scroll_down_aggressively, |
7614d762 RS |
5512 | doc: /* Default value of `scroll-down-aggressively'. |
5513 | This value applies in buffers that don't have their own local values. | |
fc961256 | 5514 | This is the same as (default-value 'scroll-down-aggressively). */); |
177c0ea7 | 5515 | |
045dee35 | 5516 | DEFVAR_PER_BUFFER ("header-line-format", |
018ba359 | 5517 | ¤t_buffer->header_line_format, |
7ee72033 | 5518 | Qnil, |
7614d762 RS |
5519 | doc: /* Analogous to `mode-line-format', but controls the header line. |
5520 | The header line appears, optionally, at the top of a window; | |
5521 | the mode line appears at the bottom. */); | |
177c0ea7 | 5522 | |
1ab256cb | 5523 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, |
efc7e75f PJ |
5524 | Qnil, |
5525 | doc: /* Template for displaying mode line for current buffer. | |
018ba359 PJ |
5526 | Each buffer has its own value of this variable. |
5527 | Value may be nil, a string, a symbol or a list or cons cell. | |
5528 | A value of nil means don't display a mode line. | |
5529 | For a symbol, its value is used (but it is ignored if t or nil). | |
5530 | A string appearing directly as the value of a symbol is processed verbatim | |
5531 | in that the %-constructs below are not recognized. | |
ed463255 | 5532 | Note that unless the symbol is marked as a `risky-local-variable', all |
177c0ea7 | 5533 | properties in any strings, as well as all :eval and :propertize forms |
ed463255 | 5534 | in the value of that symbol will be ignored. |
018ba359 | 5535 | For a list of the form `(:eval FORM)', FORM is evaluated and the result |
9c3eecf3 RS |
5536 | is used as a mode line element. Be careful--FORM should not load any files, |
5537 | because that can cause an infinite recursion. | |
ed463255 KS |
5538 | For a list of the form `(:propertize ELT PROPS...)', ELT is displayed |
5539 | with the specified properties PROPS applied. | |
018ba359 PJ |
5540 | For a list whose car is a symbol, the symbol's value is taken, |
5541 | and if that is non-nil, the cadr of the list is processed recursively. | |
5542 | Otherwise, the caddr of the list (if there is one) is processed. | |
5543 | For a list whose car is a string or list, each element is processed | |
5544 | recursively and the results are effectively concatenated. | |
5545 | For a list whose car is an integer, the cdr of the list is processed | |
5546 | and padded (if the number is positive) or truncated (if negative) | |
5547 | to the width specified by that number. | |
5548 | A string is printed verbatim in the mode line except for %-constructs: | |
5549 | (%-constructs are allowed when the string is the entire mode-line-format | |
5550 | or when it is found in a cons-cell or a list) | |
5551 | %b -- print buffer name. %f -- print visited file name. | |
5552 | %F -- print frame name. | |
5553 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen. | |
5554 | %& is like %*, but ignore read-only-ness. | |
5555 | % means buffer is read-only and * means it is modified. | |
5556 | For a modified read-only buffer, %* gives % and %+ gives *. | |
5557 | %s -- print process status. %l -- print the current line number. | |
5558 | %c -- print the current column number (this makes editing slower). | |
5559 | To make the column number update correctly in all cases, | |
5560 | `column-number-mode' must be non-nil. | |
6b61353c KH |
5561 | %i -- print the size of the buffer. |
5562 | %I -- like %i, but use k, M, G, etc., to abbreviate. | |
018ba359 PJ |
5563 | %p -- print percent of buffer above top of window, or Top, Bot or All. |
5564 | %P -- print percent of buffer above bottom of window, perhaps plus Top, | |
5565 | or print Bottom or All. | |
018ba359 | 5566 | %n -- print Narrow if appropriate. |
dafbe726 | 5567 | %t -- visited file is text or binary (if OS supports this distinction). |
47419860 | 5568 | %z -- print mnemonics of keyboard, terminal, and buffer coding systems. |
018ba359 | 5569 | %Z -- like %z, but including the end-of-line format. |
dafbe726 | 5570 | %e -- print error message about full memory. |
f7165034 NR |
5571 | %@ -- print @ or hyphen. @ means that default-directory is on a |
5572 | remote machine. | |
018ba359 PJ |
5573 | %[ -- print one [ for each recursive editing level. %] similar. |
5574 | %% -- print %. %- -- print infinitely many dashes. | |
5575 | Decimal digits after the % specify field width to which to pad. */); | |
5576 | ||
7ee72033 | 5577 | DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults.major_mode, |
5a021dd0 | 5578 | doc: /* *Value of `major-mode' for new buffers. */); |
1ab256cb RM |
5579 | |
5580 | DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer->major_mode, | |
7ee72033 | 5581 | make_number (Lisp_Symbol), |
5a021dd0 GM |
5582 | doc: /* Symbol for current buffer's major mode. |
5583 | The default value (normally `fundamental-mode') affects new buffers. | |
5584 | A value of nil means to use the current buffer's major mode, provided | |
5585 | it is not marked as "special". | |
5586 | ||
5587 | When a mode is used by default, `find-file' switches to it before it | |
5588 | reads the contents into the buffer and before it finishes setting up | |
5589 | the buffer. Thus, the mode and its hooks should not expect certain | |
5590 | variables such as `buffer-read-only' and `buffer-file-coding-system' | |
5591 | to be set up. */); | |
1ab256cb RM |
5592 | |
5593 | DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer->mode_name, | |
c01d0677 | 5594 | Qnil, |
64a7c220 | 5595 | doc: /* Pretty name of current buffer's major mode. |
7cb70974 EZ |
5596 | Usually a string, but can use any of the constructs for `mode-line-format', |
5597 | which see. | |
5598 | Format with `format-mode-line' to produce a string value. */); | |
1ab256cb | 5599 | |
d6aa1876 SM |
5600 | DEFVAR_PER_BUFFER ("local-abbrev-table", ¤t_buffer->abbrev_table, Qnil, |
5601 | doc: /* Local (mode-specific) abbrev table of current buffer. */); | |
5602 | ||
7ee72033 | 5603 | DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer->abbrev_mode, Qnil, |
efc7e75f | 5604 | doc: /* Non-nil turns on automatic expansion of abbrevs as they are inserted. */); |
1ab256cb RM |
5605 | |
5606 | DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer->case_fold_search, | |
7ee72033 | 5607 | Qnil, |
efc7e75f | 5608 | doc: /* *Non-nil if searches and matches should ignore case. */); |
1ab256cb RM |
5609 | |
5610 | DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer->fill_column, | |
2de9f71c | 5611 | make_number (LISP_INT_TAG), |
1ac5826d | 5612 | doc: /* *Column beyond which automatic line-wrapping should happen. |
f1ccb329 | 5613 | Interactively, you can set the buffer local value using \\[set-fill-column]. */); |
1ab256cb RM |
5614 | |
5615 | DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer->left_margin, | |
2de9f71c | 5616 | make_number (LISP_INT_TAG), |
fc961256 | 5617 | doc: /* *Column for the default `indent-line-function' to indent to. |
018ba359 | 5618 | Linefeed indents to this column in Fundamental mode. */); |
1ab256cb RM |
5619 | |
5620 | DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer->tab_width, | |
2de9f71c | 5621 | make_number (LISP_INT_TAG), |
efc7e75f | 5622 | doc: /* *Distance between tab stops (for display of tab characters), in columns. */); |
1ab256cb | 5623 | |
7ee72033 | 5624 | DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer->ctl_arrow, Qnil, |
efc7e75f | 5625 | doc: /* *Non-nil means display control chars with uparrow. |
018ba359 PJ |
5626 | A value of nil means use backslash and octal digits. |
5627 | This variable does not apply to characters whose display is specified | |
5628 | in the current display table (if there is one). */); | |
1ab256cb | 5629 | |
3b06f880 | 5630 | DEFVAR_PER_BUFFER ("enable-multibyte-characters", |
1bf08baf | 5631 | ¤t_buffer->enable_multibyte_characters, |
a9b9a780 | 5632 | Qnil, |
efc7e75f | 5633 | doc: /* Non-nil means the buffer contents are regarded as multi-byte characters. |
018ba359 PJ |
5634 | Otherwise they are regarded as unibyte. This affects the display, |
5635 | file I/O and the behavior of various editing commands. | |
5636 | ||
5637 | This variable is buffer-local but you cannot set it directly; | |
5638 | use the function `set-buffer-multibyte' to change a buffer's representation. | |
5639 | Changing its default value with `setq-default' is supported. | |
5640 | See also variable `default-enable-multibyte-characters' and Info node | |
5641 | `(elisp)Text Representations'. */); | |
d67b4f80 | 5642 | XSYMBOL (intern_c_string ("enable-multibyte-characters"))->constant = 1; |
3b06f880 | 5643 | |
c71b5d9b | 5644 | DEFVAR_PER_BUFFER ("buffer-file-coding-system", |
7ee72033 | 5645 | ¤t_buffer->buffer_file_coding_system, Qnil, |
efc7e75f | 5646 | doc: /* Coding system to be used for encoding the buffer contents on saving. |
018ba359 PJ |
5647 | This variable applies to saving the buffer, and also to `write-region' |
5648 | and other functions that use `write-region'. | |
5649 | It does not apply to sending output to subprocesses, however. | |
5650 | ||
5651 | If this is nil, the buffer is saved without any code conversion | |
5652 | unless some coding system is specified in `file-coding-system-alist' | |
5653 | for the buffer file. | |
5654 | ||
31a6cb06 EZ |
5655 | If the text to be saved cannot be encoded as specified by this variable, |
5656 | an alternative encoding is selected by `select-safe-coding-system', which see. | |
5657 | ||
018ba359 PJ |
5658 | The variable `coding-system-for-write', if non-nil, overrides this variable. |
5659 | ||
5660 | This variable is never applied to a way of decoding a file while reading it. */); | |
c71b5d9b | 5661 | |
f44e260c EZ |
5662 | DEFVAR_PER_BUFFER ("bidi-display-reordering", |
5663 | ¤t_buffer->bidi_display_reordering, Qnil, | |
938efb77 | 5664 | doc: /* Non-nil means reorder bidirectional text for display in the visual order. */); |
3b06f880 | 5665 | |
6c0cf218 EZ |
5666 | DEFVAR_PER_BUFFER ("bidi-paragraph-direction", |
5667 | ¤t_buffer->bidi_paragraph_direction, Qnil, | |
b44d9321 | 5668 | doc: /* *If non-nil, forces directionality of text paragraphs in the buffer. |
b4bf28b7 | 5669 | |
b44d9321 EZ |
5670 | If this is nil (the default), the direction of each paragraph is |
5671 | determined by the first strong directional character of its text. | |
5672 | The values of `right-to-left' and `left-to-right' override that. | |
5673 | Any other value is treated as nil. | |
b4bf28b7 | 5674 | |
b44d9321 EZ |
5675 | This variable has no effect unless the buffer's value of |
5676 | \`bidi-display-reordering' is non-nil. */); | |
5677 | ||
b7b65b15 | 5678 | DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer->truncate_lines, Qnil, |
7614d762 RS |
5679 | doc: /* *Non-nil means do not display continuation lines. |
5680 | Instead, give each line of text just one screen line. | |
018ba359 PJ |
5681 | |
5682 | Note that this is overridden by the variable | |
5683 | `truncate-partial-width-windows' if that variable is non-nil | |
5684 | and this buffer is not full-frame width. */); | |
1ab256cb | 5685 | |
0858cd02 CY |
5686 | DEFVAR_PER_BUFFER ("word-wrap", ¤t_buffer->word_wrap, Qnil, |
5687 | doc: /* *Non-nil means to use word-wrapping for continuation lines. | |
5688 | When word-wrapping is on, continuation lines are wrapped at the space | |
5689 | or tab character nearest to the right window edge. | |
5690 | If nil, continuation lines are wrapped at the right screen edge. | |
5691 | ||
5692 | This variable has no effect if long lines are truncated (see | |
eb577e27 GM |
5693 | `truncate-lines' and `truncate-partial-width-windows'). If you use |
5694 | word-wrapping, you might want to reduce the value of | |
5695 | `truncate-partial-width-windows', since wrapping can make text readable | |
5696 | in narrower windows. */); | |
0858cd02 | 5697 | |
f7975d07 | 5698 | #ifdef DOS_NT |
54ad07d3 | 5699 | DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer->buffer_file_type, |
7ee72033 | 5700 | Qnil, |
efc7e75f | 5701 | doc: /* Non-nil if the visited file is a binary file. |
018ba359 PJ |
5702 | This variable is meaningful on MS-DOG and Windows NT. |
5703 | On those systems, it is automatically local in every buffer. | |
5704 | On other systems, this variable is normally always nil. */); | |
54ad07d3 RS |
5705 | #endif |
5706 | ||
1ab256cb | 5707 | DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer->directory, |
7ee72033 | 5708 | make_number (Lisp_String), |
efc7e75f | 5709 | doc: /* Name of default directory of current buffer. Should end with slash. |
018ba359 | 5710 | To interactively change the default directory, use command `cd'. */); |
1ab256cb RM |
5711 | |
5712 | DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer->auto_fill_function, | |
7ee72033 | 5713 | Qnil, |
efc7e75f | 5714 | doc: /* Function called (if non-nil) to perform auto-fill. |
018ba359 PJ |
5715 | It is called after self-inserting any character specified in |
5716 | the `auto-fill-chars' table. | |
5717 | NOTE: This variable is not a hook; | |
5718 | its value may not be a list of functions. */); | |
1ab256cb RM |
5719 | |
5720 | DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer->filename, | |
7ee72033 | 5721 | make_number (Lisp_String), |
efc7e75f | 5722 | doc: /* Name of file visited in current buffer, or nil if not visiting a file. */); |
1ab256cb | 5723 | |
f6ed2e84 | 5724 | DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer->file_truename, |
7ee72033 | 5725 | make_number (Lisp_String), |
efc7e75f | 5726 | doc: /* Abbreviated truename of file visited in current buffer, or nil if none. |
018ba359 PJ |
5727 | The truename of a file is calculated by `file-truename' |
5728 | and then abbreviated with `abbreviate-file-name'. */); | |
f6ed2e84 | 5729 | |
1ab256cb | 5730 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", |
3f5fcd47 | 5731 | ¤t_buffer->auto_save_file_name, |
7ee72033 | 5732 | make_number (Lisp_String), |
7614d762 RS |
5733 | doc: /* Name of file for auto-saving current buffer. |
5734 | If it is nil, that means don't auto-save this buffer. */); | |
1ab256cb | 5735 | |
7ee72033 | 5736 | DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer->read_only, Qnil, |
efc7e75f | 5737 | doc: /* Non-nil if this buffer is read-only. */); |
1ab256cb | 5738 | |
7ee72033 | 5739 | DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer->backed_up, Qnil, |
efc7e75f | 5740 | doc: /* Non-nil if this buffer's file has been backed up. |
018ba359 | 5741 | Backing up is done before the first time the file is saved. */); |
1ab256cb RM |
5742 | |
5743 | DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer->save_length, | |
2de9f71c | 5744 | make_number (LISP_INT_TAG), |
efc7e75f | 5745 | doc: /* Length of current buffer when last read in, saved or auto-saved. |
4be941e3 RS |
5746 | 0 initially. |
5747 | -1 means auto-saving turned off until next real save. | |
5748 | ||
5749 | If you set this to -2, that means don't turn off auto-saving in this buffer | |
5750 | if its text size shrinks. If you use `buffer-swap-text' on a buffer, | |
5751 | you probably should set this to -2 in that buffer. */); | |
1ab256cb RM |
5752 | |
5753 | DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer->selective_display, | |
7ee72033 | 5754 | Qnil, |
7614d762 | 5755 | doc: /* Non-nil enables selective display. |
a66f285a JB |
5756 | An integer N as value means display only lines |
5757 | that start with less than N columns of space. | |
7614d762 RS |
5758 | A value of t means that the character ^M makes itself and |
5759 | all the rest of the line invisible; also, when saving the buffer | |
5760 | in a file, save the ^M as a newline. */); | |
1ab256cb RM |
5761 | |
5762 | #ifndef old | |
5763 | DEFVAR_PER_BUFFER ("selective-display-ellipses", | |
d765e3a3 | 5764 | ¤t_buffer->selective_display_ellipses, |
7ee72033 | 5765 | Qnil, |
3f676284 | 5766 | doc: /* Non-nil means display ... on previous line when a line is invisible. */); |
1ab256cb RM |
5767 | #endif |
5768 | ||
7ee72033 | 5769 | DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer->overwrite_mode, Qnil, |
efc7e75f | 5770 | doc: /* Non-nil if self-insertion should replace existing text. |
018ba359 PJ |
5771 | The value should be one of `overwrite-mode-textual', |
5772 | `overwrite-mode-binary', or nil. | |
5773 | If it is `overwrite-mode-textual', self-insertion still | |
5774 | inserts at the end of a line, and inserts when point is before a tab, | |
5775 | until the tab is filled in. | |
5776 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */); | |
5777 | ||
54939090 | 5778 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, |
7ee72033 | 5779 | Qnil, |
efc7e75f | 5780 | doc: /* Display table that controls display of the contents of current buffer. |
018ba359 PJ |
5781 | |
5782 | If this variable is nil, the value of `standard-display-table' is used. | |
5783 | Each window can have its own, overriding display table, see | |
5784 | `set-window-display-table' and `window-display-table'. | |
5785 | ||
5786 | The display table is a char-table created with `make-display-table'. | |
5787 | A char-table is an array indexed by character codes. Normal array | |
5788 | primitives `aref' and `aset' can be used to access elements of a char-table. | |
5789 | ||
5790 | Each of the char-table elements control how to display the corresponding | |
5791 | text character: the element at index C in the table says how to display | |
5792 | the character whose code is C. Each element should be a vector of | |
426a9163 JB |
5793 | characters or nil. The value nil means display the character in the |
5794 | default fashion; otherwise, the characters from the vector are delivered | |
5795 | to the screen instead of the original character. | |
018ba359 | 5796 | |
5fd11dc8 | 5797 | For example, (aset buffer-display-table ?X [?Y]) tells Emacs |
adbb3b05 | 5798 | to display a capital Y instead of each X character. |
018ba359 PJ |
5799 | |
5800 | In addition, a char-table has six extra slots to control the display of: | |
5801 | ||
5802 | the end of a truncated screen line (extra-slot 0, a single character); | |
5803 | the end of a continued line (extra-slot 1, a single character); | |
5804 | the escape character used to display character codes in octal | |
5805 | (extra-slot 2, a single character); | |
5806 | the character used as an arrow for control characters (extra-slot 3, | |
5807 | a single character); | |
5808 | the decoration indicating the presence of invisible lines (extra-slot 4, | |
5809 | a vector of characters); | |
5810 | the character used to draw the border between side-by-side windows | |
5811 | (extra-slot 5, a single character). | |
5812 | ||
5813 | See also the functions `display-table-slot' and `set-display-table-slot'. */); | |
1ab256cb | 5814 | |
2ad8731a | 5815 | DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer->left_margin_cols, |
7ee72033 | 5816 | Qnil, |
efc7e75f | 5817 | doc: /* *Width of left marginal area for display of a buffer. |
018ba359 | 5818 | A value of nil means no marginal area. */); |
177c0ea7 | 5819 | |
2ad8731a | 5820 | DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer->right_margin_cols, |
7ee72033 | 5821 | Qnil, |
efc7e75f | 5822 | doc: /* *Width of right marginal area for display of a buffer. |
018ba359 | 5823 | A value of nil means no marginal area. */); |
177c0ea7 | 5824 | |
2ad8731a KS |
5825 | DEFVAR_PER_BUFFER ("left-fringe-width", ¤t_buffer->left_fringe_width, |
5826 | Qnil, | |
5827 | doc: /* *Width of this buffer's left fringe (in pixels). | |
5828 | A value of 0 means no left fringe is shown in this buffer's window. | |
5829 | A value of nil means to use the left fringe width from the window's frame. */); | |
5830 | ||
5831 | DEFVAR_PER_BUFFER ("right-fringe-width", ¤t_buffer->right_fringe_width, | |
5832 | Qnil, | |
5833 | doc: /* *Width of this buffer's right fringe (in pixels). | |
5834 | A value of 0 means no right fringe is shown in this buffer's window. | |
5835 | A value of nil means to use the right fringe width from the window's frame. */); | |
5836 | ||
5837 | DEFVAR_PER_BUFFER ("fringes-outside-margins", ¤t_buffer->fringes_outside_margins, | |
5838 | Qnil, | |
5839 | doc: /* *Non-nil means to display fringes outside display margins. | |
5840 | A value of nil means to display fringes between margins and buffer text. */); | |
5841 | ||
5842 | DEFVAR_PER_BUFFER ("scroll-bar-width", ¤t_buffer->scroll_bar_width, | |
5843 | Qnil, | |
5844 | doc: /* *Width of this buffer's scroll bars in pixels. | |
5845 | A value of nil means to use the scroll bar width from the window's frame. */); | |
5846 | ||
5847 | DEFVAR_PER_BUFFER ("vertical-scroll-bar", ¤t_buffer->vertical_scroll_bar_type, | |
5848 | Qnil, | |
5849 | doc: /* *Position of this buffer's vertical scroll bar. | |
7c6b2007 | 5850 | The value takes effect whenever you tell a window to display this buffer; |
188577ce | 5851 | for instance, with `set-window-buffer' or when `display-buffer' displays it. |
7c6b2007 | 5852 | |
fc2c8887 RS |
5853 | A value of `left' or `right' means put the vertical scroll bar at that side |
5854 | of the window; a value of nil means don't show any vertical scroll bars. | |
5855 | A value of t (the default) means do whatever the window's frame specifies. */); | |
2ad8731a | 5856 | |
0552666b | 5857 | DEFVAR_PER_BUFFER ("indicate-empty-lines", |
7ee72033 | 5858 | ¤t_buffer->indicate_empty_lines, Qnil, |
efc7e75f | 5859 | doc: /* *Visually indicate empty lines after the buffer end. |
018ba359 PJ |
5860 | If non-nil, a bitmap is displayed in the left fringe of a window on |
5861 | window-systems. */); | |
177c0ea7 | 5862 | |
6b61353c KH |
5863 | DEFVAR_PER_BUFFER ("indicate-buffer-boundaries", |
5864 | ¤t_buffer->indicate_buffer_boundaries, Qnil, | |
5865 | doc: /* *Visually indicate buffer boundaries and scrolling. | |
5866 | If non-nil, the first and last line of the buffer are marked in the fringe | |
5867 | of a window on window-systems with angle bitmaps, or if the window can be | |
5868 | scrolled, the top and bottom line of the window are marked with up and down | |
5869 | arrow bitmaps. | |
b2229037 KS |
5870 | |
5871 | If value is a symbol `left' or `right', both angle and arrow bitmaps | |
79e3497d | 5872 | are displayed in the left or right fringe, resp. Any other value |
845a78b4 | 5873 | that doesn't look like an alist means display the angle bitmaps in |
79e3497d | 5874 | the left fringe but no arrows. |
b2229037 | 5875 | |
79e3497d RS |
5876 | You can exercise more precise control by using an alist as the |
5877 | value. Each alist element (INDICATOR . POSITION) specifies | |
5878 | where to show one of the indicators. INDICATOR is one of `top', | |
b2229037 KS |
5879 | `bottom', `up', `down', or t, which specifies the default position, |
5880 | and POSITION is one of `left', `right', or nil, meaning do not show | |
5881 | this indicator. | |
5882 | ||
5883 | For example, ((top . left) (t . right)) places the top angle bitmap in | |
5884 | left fringe, the bottom angle bitmap in right fringe, and both arrow | |
6b61353c | 5885 | bitmaps in right fringe. To show just the angle bitmaps in the left |
b2229037 | 5886 | fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */); |
6b61353c | 5887 | |
c6a46372 KS |
5888 | DEFVAR_PER_BUFFER ("fringe-indicator-alist", |
5889 | ¤t_buffer->fringe_indicator_alist, Qnil, | |
5890 | doc: /* *Mapping from logical to physical fringe indicator bitmaps. | |
5891 | The value is an alist where each element (INDICATOR . BITMAPS) | |
5892 | specifies the fringe bitmaps used to display a specific logical | |
5893 | fringe indicator. | |
5894 | ||
5895 | INDICATOR specifies the logical indicator type which is one of the | |
5896 | following symbols: `truncation' , `continuation', `overlay-arrow', | |
14fb5704 | 5897 | `top', `bottom', `top-bottom', `up', `down', empty-line', or `unknown'. |
c6a46372 | 5898 | |
14fb5704 | 5899 | BITMAPS is a list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies |
c6a46372 KS |
5900 | the actual bitmap shown in the left or right fringe for the logical |
5901 | indicator. LEFT and RIGHT are the bitmaps shown in the left and/or | |
5902 | right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps | |
14fb5704 JB |
5903 | are used only for the `bottom' and `top-bottom' indicators when the |
5904 | last (only) line has no final newline. BITMAPS may also be a single | |
c6a46372 KS |
5905 | symbol which is used in both left and right fringes. */); |
5906 | ||
5907 | DEFVAR_PER_BUFFER ("fringe-cursor-alist", | |
5908 | ¤t_buffer->fringe_cursor_alist, Qnil, | |
5909 | doc: /* *Mapping from logical to physical fringe cursor bitmaps. | |
5910 | The value is an alist where each element (CURSOR . BITMAP) | |
5911 | specifies the fringe bitmaps used to display a specific logical | |
5912 | cursor type in the fringe. | |
5913 | ||
5914 | CURSOR specifies the logical cursor type which is one of the following | |
5915 | symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last | |
5916 | one is used to show a hollow cursor on narrow lines display lines | |
5917 | where the normal hollow cursor will not fit. | |
5918 | ||
5919 | BITMAP is the corresponding fringe bitmap shown for the logical | |
5920 | cursor type. */); | |
5921 | ||
0552666b | 5922 | DEFVAR_PER_BUFFER ("scroll-up-aggressively", |
7ee72033 | 5923 | ¤t_buffer->scroll_up_aggressively, Qnil, |
4e0692c1 RS |
5924 | doc: /* How far to scroll windows upward. |
5925 | If you move point off the bottom, the window scrolls automatically. | |
426a9163 | 5926 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
5927 | means scroll to center point. A fraction means scroll to put point |
5928 | that fraction of the window's height from the bottom of the window. | |
d765e3a3 JB |
5929 | When the value is 0.0, point goes at the bottom line, which in the |
5930 | simple case that you moved off with C-f means scrolling just one line. | |
5931 | 1.0 means point goes at the top, so that in that simple case, the | |
5932 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 5933 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 5934 | |
0552666b | 5935 | DEFVAR_PER_BUFFER ("scroll-down-aggressively", |
7ee72033 | 5936 | ¤t_buffer->scroll_down_aggressively, Qnil, |
4e0692c1 RS |
5937 | doc: /* How far to scroll windows downward. |
5938 | If you move point off the top, the window scrolls automatically. | |
426a9163 | 5939 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
5940 | means scroll to center point. A fraction means scroll to put point |
5941 | that fraction of the window's height from the top of the window. | |
d765e3a3 JB |
5942 | When the value is 0.0, point goes at the top line, which in the |
5943 | simple case that you moved off with C-b means scrolling just one line. | |
5944 | 1.0 means point goes at the bottom, so that in that simple case, the | |
5945 | window scrolls by a full window height. Meaningful values are | |
175e9712 | 5946 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 5947 | |
1ab256cb RM |
5948 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
5949 | "Don't ask."); | |
5950 | */ | |
1ab256cb | 5951 | |
7ee72033 MB |
5952 | DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions, |
5953 | doc: /* List of functions to call before each text change. | |
018ba359 PJ |
5954 | Two arguments are passed to each function: the positions of |
5955 | the beginning and end of the range of old text to be changed. | |
5956 | \(For an insertion, the beginning and end are at the same place.) | |
5957 | No information is given about the length of the text after the change. | |
5958 | ||
5959 | Buffer changes made while executing the `before-change-functions' | |
5960 | don't call any before-change or after-change functions. | |
5961 | That's because these variables are temporarily set to nil. | |
d765e3a3 JB |
5962 | As a result, a hook function cannot straightforwardly alter the |
5963 | value of these variables. See the Emacs Lisp manual for a way of | |
018ba359 PJ |
5964 | accomplishing an equivalent result by using other variables. |
5965 | ||
5966 | If an unhandled error happens in running these functions, | |
5967 | the variable's value remains nil. That prevents the error | |
5968 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
5969 | Vbefore_change_functions = Qnil; |
5970 | ||
7ee72033 | 5971 | DEFVAR_LISP ("after-change-functions", &Vafter_change_functions, |
eacdfade | 5972 | doc: /* List of functions to call after each text change. |
018ba359 PJ |
5973 | Three arguments are passed to each function: the positions of |
5974 | the beginning and end of the range of changed text, | |
5975 | and the length in bytes of the pre-change text replaced by that range. | |
5976 | \(For an insertion, the pre-change length is zero; | |
5977 | for a deletion, that length is the number of bytes deleted, | |
5978 | and the post-change beginning and end are at the same place.) | |
5979 | ||
5980 | Buffer changes made while executing the `after-change-functions' | |
5981 | don't call any before-change or after-change functions. | |
5982 | That's because these variables are temporarily set to nil. | |
d765e3a3 JB |
5983 | As a result, a hook function cannot straightforwardly alter the |
5984 | value of these variables. See the Emacs Lisp manual for a way of | |
018ba359 PJ |
5985 | accomplishing an equivalent result by using other variables. |
5986 | ||
5987 | If an unhandled error happens in running these functions, | |
5988 | the variable's value remains nil. That prevents the error | |
5989 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
5990 | Vafter_change_functions = Qnil; |
5991 | ||
7ee72033 | 5992 | DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook, |
efc7e75f | 5993 | doc: /* A list of functions to call before changing a buffer which is unmodified. |
018ba359 | 5994 | The functions are run using the `run-hooks' function. */); |
dbc4e1c1 | 5995 | Vfirst_change_hook = Qnil; |
1ab256cb | 5996 | |
7ee72033 MB |
5997 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, |
5998 | doc: /* List of undo entries in current buffer. | |
018ba359 PJ |
5999 | Recent changes come first; older changes follow newer. |
6000 | ||
6001 | An entry (BEG . END) represents an insertion which begins at | |
6002 | position BEG and ends at position END. | |
6003 | ||
6004 | An entry (TEXT . POSITION) represents the deletion of the string TEXT | |
6005 | from (abs POSITION). If POSITION is positive, point was at the front | |
6006 | of the text being deleted; if negative, point was at the end. | |
6007 | ||
6008 | An entry (t HIGH . LOW) indicates that the buffer previously had | |
6009 | \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions | |
6010 | of the visited file's modification time, as of that time. If the | |
6011 | modification time of the most recent save is different, this entry is | |
6012 | obsolete. | |
6013 | ||
6014 | An entry (nil PROPERTY VALUE BEG . END) indicates that a text property | |
6015 | was modified between BEG and END. PROPERTY is the property name, | |
6016 | and VALUE is the old value. | |
6017 | ||
7405f386 KS |
6018 | An entry (apply FUN-NAME . ARGS) means undo the change with |
6019 | \(apply FUN-NAME ARGS). | |
6020 | ||
6021 | An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo | |
6022 | in the active region. BEG and END is the range affected by this entry | |
6023 | and DELTA is the number of bytes added or deleted in that range by | |
6024 | this change. | |
c6c7dc03 | 6025 | |
018ba359 PJ |
6026 | An entry (MARKER . DISTANCE) indicates that the marker MARKER |
6027 | was adjusted in position by the offset DISTANCE (an integer). | |
6028 | ||
6029 | An entry of the form POSITION indicates that point was at the buffer | |
6030 | location given by the integer. Undoing an entry of this form places | |
6031 | point at POSITION. | |
6032 | ||
b4c4f2f4 JB |
6033 | Entries with value `nil' mark undo boundaries. The undo command treats |
6034 | the changes between two undo boundaries as a single step to be undone. | |
018ba359 PJ |
6035 | |
6036 | If the value of the variable is t, undo information is not recorded. */); | |
6037 | ||
7ee72033 MB |
6038 | DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer->mark_active, Qnil, |
6039 | doc: /* Non-nil means the mark and region are currently active in this buffer. */); | |
018ba359 | 6040 | |
7ee72033 MB |
6041 | DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer->cache_long_line_scans, Qnil, |
6042 | doc: /* Non-nil means that Emacs should use caches to handle long lines more quickly. | |
018ba359 PJ |
6043 | |
6044 | Normally, the line-motion functions work by scanning the buffer for | |
5629f29b DK |
6045 | newlines. Columnar operations (like `move-to-column' and |
6046 | `compute-motion') also work by scanning the buffer, summing character | |
018ba359 PJ |
6047 | widths as they go. This works well for ordinary text, but if the |
6048 | buffer's lines are very long (say, more than 500 characters), these | |
6049 | motion functions will take longer to execute. Emacs may also take | |
6050 | longer to update the display. | |
6051 | ||
5629f29b | 6052 | If `cache-long-line-scans' is non-nil, these motion functions cache the |
018ba359 PJ |
6053 | results of their scans, and consult the cache to avoid rescanning |
6054 | regions of the buffer until the text is modified. The caches are most | |
6055 | beneficial when they prevent the most searching---that is, when the | |
6056 | buffer contains long lines and large regions of characters with the | |
6057 | same, fixed screen width. | |
6058 | ||
5629f29b | 6059 | When `cache-long-line-scans' is non-nil, processing short lines will |
018ba359 PJ |
6060 | become slightly slower (because of the overhead of consulting the |
6061 | cache), and the caches will use memory roughly proportional to the | |
6062 | number of newlines and characters whose screen width varies. | |
6063 | ||
6064 | The caches require no explicit maintenance; their accuracy is | |
6065 | maintained internally by the Emacs primitives. Enabling or disabling | |
6066 | the cache should not affect the behavior of any of the motion | |
6067 | functions; it should only affect their performance. */); | |
6068 | ||
7ee72033 MB |
6069 | DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer->point_before_scroll, Qnil, |
6070 | doc: /* Value of point before the last series of scroll operations, or nil. */); | |
018ba359 | 6071 | |
7ee72033 MB |
6072 | DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer->file_format, Qnil, |
6073 | doc: /* List of formats to use when saving this buffer. | |
018ba359 | 6074 | Formats are defined by `format-alist'. This variable is |
a9b9a780 | 6075 | set when a file is visited. */); |
be9aafdd | 6076 | |
71ed49fa LT |
6077 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-format", |
6078 | ¤t_buffer->auto_save_file_format, Qnil, | |
6079 | doc: /* *Format in which to write auto-save files. | |
6080 | Should be a list of symbols naming formats that are defined in `format-alist'. | |
6081 | If it is t, which is the default, auto-save files are written in the | |
6082 | same format as a regular save would use. */); | |
6083 | ||
3cb719bd | 6084 | DEFVAR_PER_BUFFER ("buffer-invisibility-spec", |
7ee72033 MB |
6085 | ¤t_buffer->invisibility_spec, Qnil, |
6086 | doc: /* Invisibility spec of this buffer. | |
018ba359 PJ |
6087 | The default is t, which means that text is invisible |
6088 | if it has a non-nil `invisible' property. | |
6089 | If the value is a list, a text character is invisible if its `invisible' | |
b49dd850 | 6090 | property is an element in that list (or is a list with members in common). |
018ba359 PJ |
6091 | If an element is a cons cell of the form (PROP . ELLIPSIS), |
6092 | then characters with property value PROP are invisible, | |
6093 | and they have an ellipsis as well if ELLIPSIS is non-nil. */); | |
3cb719bd | 6094 | |
7962a441 | 6095 | DEFVAR_PER_BUFFER ("buffer-display-count", |
7ee72033 MB |
6096 | ¤t_buffer->display_count, Qnil, |
6097 | doc: /* A number incremented each time this buffer is displayed in a window. | |
018ba359 | 6098 | The function `set-window-buffer' increments it. */); |
3fd364db RS |
6099 | |
6100 | DEFVAR_PER_BUFFER ("buffer-display-time", | |
7ee72033 MB |
6101 | ¤t_buffer->display_time, Qnil, |
6102 | doc: /* Time stamp updated each time this buffer is displayed in a window. | |
018ba359 PJ |
6103 | The function `set-window-buffer' updates this variable |
6104 | to the value obtained by calling `current-time'. | |
6105 | If the buffer has never been shown in a window, the value is nil. */); | |
6106 | ||
7ee72033 | 6107 | DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode, |
526c9df9 | 6108 | doc: /* */); |
c48f61ef | 6109 | Vtransient_mark_mode = Qnil; |
526c9df9 CY |
6110 | /* The docstring is in simple.el. If we put it here, it would be |
6111 | overwritten when transient-mark-mode is defined using | |
6112 | define-minor-mode. */ | |
c48f61ef | 6113 | |
7ee72033 MB |
6114 | DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only, |
6115 | doc: /* *Non-nil means disregard read-only status of buffers or characters. | |
018ba359 PJ |
6116 | If the value is t, disregard `buffer-read-only' and all `read-only' |
6117 | text properties. If the value is a list, disregard `buffer-read-only' | |
6118 | and disregard a `read-only' text property if the property value | |
6119 | is a member of the list. */); | |
a96b68f1 RS |
6120 | Vinhibit_read_only = Qnil; |
6121 | ||
7ee72033 | 6122 | DEFVAR_PER_BUFFER ("cursor-type", ¤t_buffer->cursor_type, Qnil, |
f6e22881 | 6123 | doc: /* Cursor to use when this buffer is in the selected window. |
018ba359 PJ |
6124 | Values are interpreted as follows: |
6125 | ||
b8dc613f JB |
6126 | t use the cursor specified for the frame |
6127 | nil don't display a cursor | |
6128 | box display a filled box cursor | |
6129 | hollow display a hollow box cursor | |
6130 | bar display a vertical bar cursor with default width | |
6131 | (bar . WIDTH) display a vertical bar cursor with width WIDTH | |
6132 | hbar display a horizontal bar cursor with default height | |
b4234f4c | 6133 | (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT |
b8dc613f | 6134 | ANYTHING ELSE display a hollow box cursor |
cd8d5236 | 6135 | |
e08b1705 MR |
6136 | When the buffer is displayed in a non-selected window, the |
6137 | cursor's appearance is instead controlled by the variable | |
6138 | `cursor-in-non-selected-windows'. */); | |
bb2ec976 | 6139 | |
a3bbced0 | 6140 | DEFVAR_PER_BUFFER ("line-spacing", |
7ee72033 MB |
6141 | ¤t_buffer->extra_line_spacing, Qnil, |
6142 | doc: /* Additional space to put between lines when displaying a buffer. | |
3ba010e5 EZ |
6143 | The space is measured in pixels, and put below lines on graphic displays, |
6144 | see `display-graphic-p'. | |
60ebfdf3 | 6145 | If value is a floating point number, it specifies the spacing relative |
fc961256 | 6146 | to the default frame line height. A value of nil means add no extra space. */); |
a3bbced0 | 6147 | |
0124c5bd | 6148 | DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows", |
187ccf49 | 6149 | ¤t_buffer->cursor_in_non_selected_windows, Qnil, |
f6e22881 | 6150 | doc: /* *Cursor type to display in non-selected windows. |
fc961256 | 6151 | The value t means to use hollow box cursor. See `cursor-type' for other values. */); |
0124c5bd | 6152 | |
7ee72033 | 6153 | DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions, |
f6e22881 JB |
6154 | doc: /* List of functions called with no args to query before killing a buffer. |
6155 | The buffer being killed will be current while the functions are running. | |
6156 | If any of them returns nil, the buffer is not killed. */); | |
dcdffbf6 RS |
6157 | Vkill_buffer_query_functions = Qnil; |
6158 | ||
43ed3b8d CY |
6159 | DEFVAR_LISP ("change-major-mode-hook", &Vchange_major_mode_hook, |
6160 | doc: /* Normal hook run before changing the major mode of a buffer. | |
6161 | The function `kill-all-local-variables' runs this before doing anything else. */); | |
6162 | Vchange_major_mode_hook = Qnil; | |
d67b4f80 | 6163 | Qchange_major_mode_hook = intern_c_string ("change-major-mode-hook"); |
43ed3b8d CY |
6164 | staticpro (&Qchange_major_mode_hook); |
6165 | ||
0dc88e60 | 6166 | defsubr (&Sbuffer_live_p); |
1ab256cb RM |
6167 | defsubr (&Sbuffer_list); |
6168 | defsubr (&Sget_buffer); | |
6169 | defsubr (&Sget_file_buffer); | |
6170 | defsubr (&Sget_buffer_create); | |
336cd056 | 6171 | defsubr (&Smake_indirect_buffer); |
01050cb5 | 6172 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb RM |
6173 | defsubr (&Sbuffer_name); |
6174 | /*defsubr (&Sbuffer_number);*/ | |
6175 | defsubr (&Sbuffer_file_name); | |
336cd056 | 6176 | defsubr (&Sbuffer_base_buffer); |
79aa712d | 6177 | defsubr (&Sbuffer_local_value); |
1ab256cb RM |
6178 | defsubr (&Sbuffer_local_variables); |
6179 | defsubr (&Sbuffer_modified_p); | |
6180 | defsubr (&Sset_buffer_modified_p); | |
6181 | defsubr (&Sbuffer_modified_tick); | |
3e145152 | 6182 | defsubr (&Sbuffer_chars_modified_tick); |
1ab256cb RM |
6183 | defsubr (&Srename_buffer); |
6184 | defsubr (&Sother_buffer); | |
1ab256cb RM |
6185 | defsubr (&Sbuffer_enable_undo); |
6186 | defsubr (&Skill_buffer); | |
a9ee7a59 | 6187 | defsubr (&Sset_buffer_major_mode); |
1ab256cb | 6188 | defsubr (&Sswitch_to_buffer); |
1ab256cb RM |
6189 | defsubr (&Scurrent_buffer); |
6190 | defsubr (&Sset_buffer); | |
6191 | defsubr (&Sbarf_if_buffer_read_only); | |
6192 | defsubr (&Sbury_buffer); | |
3ac81adb | 6193 | defsubr (&Serase_buffer); |
13cda5f9 | 6194 | defsubr (&Sbuffer_swap_text); |
3ac81adb | 6195 | defsubr (&Sset_buffer_multibyte); |
1ab256cb | 6196 | defsubr (&Skill_all_local_variables); |
2eec3b4e | 6197 | |
52f8ec73 | 6198 | defsubr (&Soverlayp); |
2eec3b4e RS |
6199 | defsubr (&Smake_overlay); |
6200 | defsubr (&Sdelete_overlay); | |
6201 | defsubr (&Smove_overlay); | |
8ebafa8d JB |
6202 | defsubr (&Soverlay_start); |
6203 | defsubr (&Soverlay_end); | |
6204 | defsubr (&Soverlay_buffer); | |
6205 | defsubr (&Soverlay_properties); | |
2eec3b4e | 6206 | defsubr (&Soverlays_at); |
74514898 | 6207 | defsubr (&Soverlays_in); |
2eec3b4e | 6208 | defsubr (&Snext_overlay_change); |
239c932b | 6209 | defsubr (&Sprevious_overlay_change); |
2eec3b4e RS |
6210 | defsubr (&Soverlay_recenter); |
6211 | defsubr (&Soverlay_lists); | |
6212 | defsubr (&Soverlay_get); | |
6213 | defsubr (&Soverlay_put); | |
a8c21b48 | 6214 | defsubr (&Srestore_buffer_modified_p); |
1ab256cb RM |
6215 | } |
6216 | ||
dfcf069d | 6217 | void |
d3da34e0 | 6218 | keys_of_buffer (void) |
1ab256cb RM |
6219 | { |
6220 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
6221 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
4158c17d RM |
6222 | |
6223 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
6224 | initialized when that function gets called. */ | |
d67b4f80 | 6225 | Fput (intern_c_string ("erase-buffer"), Qdisabled, Qt); |
1ab256cb | 6226 | } |
6b61353c KH |
6227 | |
6228 | /* arch-tag: e48569bf-69a9-4b65-a23b-8e68769436e1 | |
6229 | (do not change this comment) */ |