Commit | Line | Data |
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1ab256cb | 1 | /* Buffer manipulation primitives for GNU Emacs. |
0b5538bd TTN |
2 | Copyright (C) 1985, 1986, 1987, 1988, 1989, 1993, 1994, |
3 | 1995, 1997, 1998, 1999, 2000, 2001, 2002, | |
8cabe764 GM |
4 | 2003, 2004, 2005, 2006, 2007, 2008 |
5 | Free Software Foundation, Inc. | |
1ab256cb RM |
6 | |
7 | This file is part of GNU Emacs. | |
8 | ||
9 | GNU Emacs is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
684d6f5b | 11 | the Free Software Foundation; either version 3, or (at your option) |
1ab256cb RM |
12 | any later version. |
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 | |
20 | along with GNU Emacs; see the file COPYING. If not, write to | |
4fc5845f LK |
21 | the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
22 | Boston, MA 02110-1301, USA. */ | |
1ab256cb | 23 | |
68c45bf0 | 24 | #include <config.h> |
1ab256cb | 25 | |
2381d133 JB |
26 | #include <sys/types.h> |
27 | #include <sys/stat.h> | |
1ab256cb | 28 | #include <sys/param.h> |
9dde47f5 | 29 | #include <errno.h> |
15e7873a | 30 | #include <stdio.h> |
9dde47f5 | 31 | |
2538fae4 | 32 | #ifndef USE_CRT_DLL |
9dde47f5 | 33 | extern int errno; |
2538fae4 | 34 | #endif |
1ab256cb | 35 | |
1ab256cb | 36 | |
dfcf069d AS |
37 | #ifdef HAVE_UNISTD_H |
38 | #include <unistd.h> | |
39 | #endif | |
7ee72033 | 40 | |
1ab256cb | 41 | #include "lisp.h" |
21cf4cf8 | 42 | #include "intervals.h" |
1ab256cb RM |
43 | #include "window.h" |
44 | #include "commands.h" | |
45 | #include "buffer.h" | |
8f348ed5 | 46 | #include "character.h" |
28e969dd | 47 | #include "region-cache.h" |
1ab256cb | 48 | #include "indent.h" |
d014bf88 | 49 | #include "blockinput.h" |
2538fae4 | 50 | #include "keyboard.h" |
e35f6ff7 | 51 | #include "keymap.h" |
08460cd4 | 52 | #include "frame.h" |
1ab256cb RM |
53 | |
54 | struct buffer *current_buffer; /* the current buffer */ | |
55 | ||
56 | /* First buffer in chain of all buffers (in reverse order of creation). | |
57 | Threaded through ->next. */ | |
58 | ||
59 | struct buffer *all_buffers; | |
60 | ||
61 | /* This structure holds the default values of the buffer-local variables | |
62 | defined with DEFVAR_PER_BUFFER, that have special slots in each buffer. | |
63 | The default value occupies the same slot in this structure | |
64 | as an individual buffer's value occupies in that buffer. | |
65 | Setting the default value also goes through the alist of buffers | |
66 | and stores into each buffer that does not say it has a local value. */ | |
67 | ||
6b61353c | 68 | DECL_ALIGN (struct buffer, buffer_defaults); |
1ab256cb RM |
69 | |
70 | /* A Lisp_Object pointer to the above, used for staticpro */ | |
71 | ||
72 | static Lisp_Object Vbuffer_defaults; | |
73 | ||
74 | /* This structure marks which slots in a buffer have corresponding | |
75 | default values in buffer_defaults. | |
76 | Each such slot has a nonzero value in this structure. | |
77 | The value has only one nonzero bit. | |
78 | ||
79 | When a buffer has its own local value for a slot, | |
7c02e886 GM |
80 | the entry for that slot (found in the same slot in this structure) |
81 | is turned on in the buffer's local_flags array. | |
1ab256cb RM |
82 | |
83 | If a slot in this structure is -1, then even though there may | |
84 | be a DEFVAR_PER_BUFFER for the slot, there is no default value for it; | |
85 | and the corresponding slot in buffer_defaults is not used. | |
86 | ||
87 | If a slot is -2, then there is no DEFVAR_PER_BUFFER for it, | |
88 | but there is a default value which is copied into each buffer. | |
89 | ||
1ab256cb RM |
90 | If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is |
91 | zero, that is a bug */ | |
92 | ||
93 | struct buffer buffer_local_flags; | |
94 | ||
95 | /* This structure holds the names of symbols whose values may be | |
96 | buffer-local. It is indexed and accessed in the same way as the above. */ | |
97 | ||
6b61353c KH |
98 | DECL_ALIGN (struct buffer, buffer_local_symbols); |
99 | ||
1ab256cb RM |
100 | /* A Lisp_Object pointer to the above, used for staticpro */ |
101 | static Lisp_Object Vbuffer_local_symbols; | |
102 | ||
13de9290 RS |
103 | /* Flags indicating which built-in buffer-local variables |
104 | are permanent locals. */ | |
7313acd0 | 105 | static char buffer_permanent_local_flags[MAX_PER_BUFFER_VARS]; |
7c02e886 GM |
106 | |
107 | /* Number of per-buffer variables used. */ | |
108 | ||
7313acd0 | 109 | int last_per_buffer_idx; |
13de9290 | 110 | |
3709505e SM |
111 | EXFUN (Fset_buffer, 1); |
112 | void set_buffer_internal P_ ((struct buffer *b)); | |
113 | void set_buffer_internal_1 P_ ((struct buffer *b)); | |
114 | static void call_overlay_mod_hooks P_ ((Lisp_Object list, Lisp_Object overlay, | |
115 | int after, Lisp_Object arg1, | |
116 | Lisp_Object arg2, Lisp_Object arg3)); | |
117 | static void swap_out_buffer_local_variables P_ ((struct buffer *b)); | |
118 | static void reset_buffer_local_variables P_ ((struct buffer *b, int permanent_too)); | |
1ab256cb RM |
119 | |
120 | /* Alist of all buffer names vs the buffers. */ | |
121 | /* This used to be a variable, but is no longer, | |
122 | to prevent lossage due to user rplac'ing this alist or its elements. */ | |
123 | Lisp_Object Vbuffer_alist; | |
124 | ||
125 | /* Functions to call before and after each text change. */ | |
5f079267 RS |
126 | Lisp_Object Vbefore_change_functions; |
127 | Lisp_Object Vafter_change_functions; | |
1ab256cb | 128 | |
c48f61ef RS |
129 | Lisp_Object Vtransient_mark_mode; |
130 | ||
a96b68f1 RS |
131 | /* t means ignore all read-only text properties. |
132 | A list means ignore such a property if its value is a member of the list. | |
133 | Any non-nil value means ignore buffer-read-only. */ | |
134 | Lisp_Object Vinhibit_read_only; | |
135 | ||
dcdffbf6 RS |
136 | /* List of functions to call that can query about killing a buffer. |
137 | If any of these functions returns nil, we don't kill it. */ | |
138 | Lisp_Object Vkill_buffer_query_functions; | |
5b20caf0 | 139 | Lisp_Object Qkill_buffer_query_functions; |
dcdffbf6 | 140 | |
43ed3b8d CY |
141 | /* Hook run before changing a major mode. */ |
142 | Lisp_Object Vchange_major_mode_hook, Qchange_major_mode_hook; | |
143 | ||
dbc4e1c1 JB |
144 | /* List of functions to call before changing an unmodified buffer. */ |
145 | Lisp_Object Vfirst_change_hook; | |
22378665 | 146 | |
dbc4e1c1 | 147 | Lisp_Object Qfirst_change_hook; |
22378665 RS |
148 | Lisp_Object Qbefore_change_functions; |
149 | Lisp_Object Qafter_change_functions; | |
48265e61 | 150 | Lisp_Object Qucs_set_table_for_input; |
1ab256cb | 151 | |
7775635d KH |
152 | /* If nonzero, all modification hooks are suppressed. */ |
153 | int inhibit_modification_hooks; | |
154 | ||
1ab256cb | 155 | Lisp_Object Qfundamental_mode, Qmode_class, Qpermanent_local; |
2f7a359d | 156 | Lisp_Object Qpermanent_local_hook; |
1ab256cb RM |
157 | |
158 | Lisp_Object Qprotected_field; | |
159 | ||
160 | Lisp_Object QSFundamental; /* A string "Fundamental" */ | |
161 | ||
162 | Lisp_Object Qkill_buffer_hook; | |
163 | ||
5fe0b67e RS |
164 | Lisp_Object Qget_file_buffer; |
165 | ||
52f8ec73 JB |
166 | Lisp_Object Qoverlayp; |
167 | ||
bbbe9545 | 168 | Lisp_Object Qpriority, Qwindow, Qevaporate, Qbefore_string, Qafter_string; |
5985d248 | 169 | |
294d215f RS |
170 | Lisp_Object Qmodification_hooks; |
171 | Lisp_Object Qinsert_in_front_hooks; | |
172 | Lisp_Object Qinsert_behind_hooks; | |
173 | ||
b86af064 GM |
174 | static void alloc_buffer_text P_ ((struct buffer *, size_t)); |
175 | static void free_buffer_text P_ ((struct buffer *b)); | |
2410d73a | 176 | static struct Lisp_Overlay * copy_overlays P_ ((struct buffer *, struct Lisp_Overlay *)); |
2e293742 | 177 | static void modify_overlay P_ ((struct buffer *, EMACS_INT, EMACS_INT)); |
e1688f54 | 178 | static Lisp_Object buffer_lisp_local_variables P_ ((struct buffer *)); |
b86af064 | 179 | |
cab1603f | 180 | extern char * emacs_strerror P_ ((int)); |
b86af064 | 181 | |
1ab256cb RM |
182 | /* For debugging; temporary. See set_buffer_internal. */ |
183 | /* Lisp_Object Qlisp_mode, Vcheck_symbol; */ | |
184 | ||
01136e9b | 185 | void |
1ab256cb RM |
186 | nsberror (spec) |
187 | Lisp_Object spec; | |
188 | { | |
a7a60ce9 | 189 | if (STRINGP (spec)) |
d5db4077 | 190 | error ("No buffer named %s", SDATA (spec)); |
1ab256cb RM |
191 | error ("Invalid buffer argument"); |
192 | } | |
193 | \f | |
0dc88e60 | 194 | DEFUN ("buffer-live-p", Fbuffer_live_p, Sbuffer_live_p, 1, 1, 0, |
7ee72033 MB |
195 | doc: /* Return non-nil if OBJECT is a buffer which has not been killed. |
196 | Value is nil if OBJECT is not a buffer or if it has been killed. */) | |
197 | (object) | |
0dc88e60 RS |
198 | Lisp_Object object; |
199 | { | |
200 | return ((BUFFERP (object) && ! NILP (XBUFFER (object)->name)) | |
201 | ? Qt : Qnil); | |
202 | } | |
203 | ||
08460cd4 | 204 | DEFUN ("buffer-list", Fbuffer_list, Sbuffer_list, 0, 1, 0, |
7ee72033 | 205 | doc: /* Return a list of all existing live buffers. |
aef466d5 RS |
206 | If the optional arg FRAME is a frame, we return the buffer list |
207 | in the proper order for that frame: the buffers in FRAME's `buffer-list' | |
208 | frame parameter come first, followed by the rest of the buffers. */) | |
7ee72033 | 209 | (frame) |
08460cd4 | 210 | Lisp_Object frame; |
1ab256cb | 211 | { |
a18b8cb5 | 212 | Lisp_Object general; |
08460cd4 RS |
213 | general = Fmapcar (Qcdr, Vbuffer_alist); |
214 | ||
215 | if (FRAMEP (frame)) | |
216 | { | |
a18b8cb5 KL |
217 | Lisp_Object framelist, prevlist, tail; |
218 | Lisp_Object args[3]; | |
08460cd4 | 219 | |
b7826503 | 220 | CHECK_FRAME (frame); |
08460cd4 RS |
221 | |
222 | framelist = Fcopy_sequence (XFRAME (frame)->buffer_list); | |
a18b8cb5 | 223 | prevlist = Fnreverse (Fcopy_sequence (XFRAME (frame)->buried_buffer_list)); |
08460cd4 | 224 | |
a18b8cb5 KL |
225 | /* Remove from GENERAL any buffer that duplicates one in |
226 | FRAMELIST or PREVLIST. */ | |
08460cd4 | 227 | tail = framelist; |
a18b8cb5 | 228 | while (CONSP (tail)) |
08460cd4 | 229 | { |
7539e11f KR |
230 | general = Fdelq (XCAR (tail), general); |
231 | tail = XCDR (tail); | |
08460cd4 | 232 | } |
a18b8cb5 KL |
233 | tail = prevlist; |
234 | while (CONSP (tail)) | |
235 | { | |
236 | general = Fdelq (XCAR (tail), general); | |
237 | tail = XCDR (tail); | |
238 | } | |
239 | ||
240 | args[0] = framelist; | |
241 | args[1] = general; | |
242 | args[2] = prevlist; | |
243 | return Fnconc (3, args); | |
08460cd4 RS |
244 | } |
245 | ||
246 | return general; | |
1ab256cb RM |
247 | } |
248 | ||
04ae1b48 RS |
249 | /* Like Fassoc, but use Fstring_equal to compare |
250 | (which ignores text properties), | |
251 | and don't ever QUIT. */ | |
252 | ||
253 | static Lisp_Object | |
254 | assoc_ignore_text_properties (key, list) | |
255 | register Lisp_Object key; | |
256 | Lisp_Object list; | |
257 | { | |
258 | register Lisp_Object tail; | |
6d70a280 | 259 | for (tail = list; CONSP (tail); tail = XCDR (tail)) |
04ae1b48 RS |
260 | { |
261 | register Lisp_Object elt, tem; | |
6d70a280 | 262 | elt = XCAR (tail); |
04ae1b48 RS |
263 | tem = Fstring_equal (Fcar (elt), key); |
264 | if (!NILP (tem)) | |
265 | return elt; | |
266 | } | |
267 | return Qnil; | |
268 | } | |
269 | ||
1ab256cb | 270 | DEFUN ("get-buffer", Fget_buffer, Sget_buffer, 1, 1, 0, |
7ee72033 | 271 | doc: /* Return the buffer named NAME (a string). |
018ba359 | 272 | If there is no live buffer named NAME, return nil. |
7ee72033 MB |
273 | NAME may also be a buffer; if so, the value is that buffer. */) |
274 | (name) | |
1ab256cb RM |
275 | register Lisp_Object name; |
276 | { | |
a7a60ce9 | 277 | if (BUFFERP (name)) |
1ab256cb | 278 | return name; |
b7826503 | 279 | CHECK_STRING (name); |
1ab256cb | 280 | |
04ae1b48 | 281 | return Fcdr (assoc_ignore_text_properties (name, Vbuffer_alist)); |
1ab256cb RM |
282 | } |
283 | ||
284 | DEFUN ("get-file-buffer", Fget_file_buffer, Sget_file_buffer, 1, 1, 0, | |
7ee72033 | 285 | doc: /* Return the buffer visiting file FILENAME (a string). |
018ba359 PJ |
286 | The buffer's `buffer-file-name' must match exactly the expansion of FILENAME. |
287 | If there is no such live buffer, return nil. | |
7ee72033 MB |
288 | See also `find-buffer-visiting'. */) |
289 | (filename) | |
1ab256cb RM |
290 | register Lisp_Object filename; |
291 | { | |
292 | register Lisp_Object tail, buf, tem; | |
5fe0b67e RS |
293 | Lisp_Object handler; |
294 | ||
b7826503 | 295 | CHECK_STRING (filename); |
1ab256cb RM |
296 | filename = Fexpand_file_name (filename, Qnil); |
297 | ||
5fe0b67e RS |
298 | /* If the file name has special constructs in it, |
299 | call the corresponding file handler. */ | |
a617e913 | 300 | handler = Ffind_file_name_handler (filename, Qget_file_buffer); |
5fe0b67e RS |
301 | if (!NILP (handler)) |
302 | return call2 (handler, Qget_file_buffer, filename); | |
303 | ||
7539e11f | 304 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 305 | { |
7539e11f | 306 | buf = Fcdr (XCAR (tail)); |
a7a60ce9 KH |
307 | if (!BUFFERP (buf)) continue; |
308 | if (!STRINGP (XBUFFER (buf)->filename)) continue; | |
1ab256cb | 309 | tem = Fstring_equal (XBUFFER (buf)->filename, filename); |
265a9e55 | 310 | if (!NILP (tem)) |
1ab256cb RM |
311 | return buf; |
312 | } | |
313 | return Qnil; | |
314 | } | |
315 | ||
52e01189 RS |
316 | Lisp_Object |
317 | get_truename_buffer (filename) | |
318 | register Lisp_Object filename; | |
319 | { | |
320 | register Lisp_Object tail, buf, tem; | |
321 | ||
7539e11f | 322 | for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail)) |
52e01189 | 323 | { |
7539e11f | 324 | buf = Fcdr (XCAR (tail)); |
52e01189 RS |
325 | if (!BUFFERP (buf)) continue; |
326 | if (!STRINGP (XBUFFER (buf)->file_truename)) continue; | |
327 | tem = Fstring_equal (XBUFFER (buf)->file_truename, filename); | |
328 | if (!NILP (tem)) | |
329 | return buf; | |
330 | } | |
331 | return Qnil; | |
332 | } | |
333 | ||
1ab256cb RM |
334 | /* Incremented for each buffer created, to assign the buffer number. */ |
335 | int buffer_count; | |
336 | ||
337 | DEFUN ("get-buffer-create", Fget_buffer_create, Sget_buffer_create, 1, 1, 0, | |
7ee72033 | 338 | doc: /* Return the buffer named NAME, or create such a buffer and return it. |
018ba359 PJ |
339 | A new buffer is created if there is no live buffer named NAME. |
340 | If NAME starts with a space, the new buffer does not keep undo information. | |
341 | If NAME is a buffer instead of a string, then it is the value returned. | |
7ee72033 MB |
342 | The value is never nil. */) |
343 | (name) | |
1ab256cb RM |
344 | register Lisp_Object name; |
345 | { | |
a9ee7a59 | 346 | register Lisp_Object buf; |
1ab256cb RM |
347 | register struct buffer *b; |
348 | ||
349 | buf = Fget_buffer (name); | |
265a9e55 | 350 | if (!NILP (buf)) |
1ab256cb RM |
351 | return buf; |
352 | ||
d5db4077 | 353 | if (SCHARS (name) == 0) |
31cd83e9 KH |
354 | error ("Empty string for buffer name is not allowed"); |
355 | ||
cc648cef | 356 | b = allocate_buffer (); |
1ab256cb | 357 | |
336cd056 RS |
358 | /* An ordinary buffer uses its own struct buffer_text. */ |
359 | b->text = &b->own_text; | |
360 | b->base_buffer = 0; | |
361 | ||
1ab256cb | 362 | BUF_GAP_SIZE (b) = 20; |
9ac0d9e0 | 363 | BLOCK_INPUT; |
3b06f880 KH |
364 | /* We allocate extra 1-byte at the tail and keep it always '\0' for |
365 | anchoring a search. */ | |
b86af064 | 366 | alloc_buffer_text (b, BUF_GAP_SIZE (b) + 1); |
9ac0d9e0 | 367 | UNBLOCK_INPUT; |
1ab256cb | 368 | if (! BUF_BEG_ADDR (b)) |
81841847 | 369 | buffer_memory_full (); |
1ab256cb | 370 | |
6d70a280 SM |
371 | BUF_PT (b) = BEG; |
372 | BUF_GPT (b) = BEG; | |
373 | BUF_BEGV (b) = BEG; | |
374 | BUF_ZV (b) = BEG; | |
375 | BUF_Z (b) = BEG; | |
376 | BUF_PT_BYTE (b) = BEG_BYTE; | |
377 | BUF_GPT_BYTE (b) = BEG_BYTE; | |
378 | BUF_BEGV_BYTE (b) = BEG_BYTE; | |
379 | BUF_ZV_BYTE (b) = BEG_BYTE; | |
380 | BUF_Z_BYTE (b) = BEG_BYTE; | |
1ab256cb | 381 | BUF_MODIFF (b) = 1; |
3e145152 | 382 | BUF_CHARS_MODIFF (b) = 1; |
2509d356 | 383 | BUF_OVERLAY_MODIFF (b) = 1; |
336cd056 RS |
384 | BUF_SAVE_MODIFF (b) = 1; |
385 | BUF_INTERVALS (b) = 0; | |
b5a225b4 GM |
386 | BUF_UNCHANGED_MODIFIED (b) = 1; |
387 | BUF_OVERLAY_UNCHANGED_MODIFIED (b) = 1; | |
388 | BUF_END_UNCHANGED (b) = 0; | |
389 | BUF_BEG_UNCHANGED (b) = 0; | |
3b06f880 | 390 | *(BUF_GPT_ADDR (b)) = *(BUF_Z_ADDR (b)) = 0; /* Put an anchor '\0'. */ |
1ab256cb | 391 | |
28e969dd JB |
392 | b->newline_cache = 0; |
393 | b->width_run_cache = 0; | |
394 | b->width_table = Qnil; | |
b5a225b4 | 395 | b->prevent_redisplay_optimizations_p = 1; |
28e969dd | 396 | |
1ab256cb RM |
397 | /* Put this on the chain of all buffers including killed ones. */ |
398 | b->next = all_buffers; | |
399 | all_buffers = b; | |
400 | ||
336cd056 RS |
401 | /* An ordinary buffer normally doesn't need markers |
402 | to handle BEGV and ZV. */ | |
403 | b->pt_marker = Qnil; | |
404 | b->begv_marker = Qnil; | |
405 | b->zv_marker = Qnil; | |
04ae1b48 RS |
406 | |
407 | name = Fcopy_sequence (name); | |
ab77f05c | 408 | STRING_SET_INTERVALS (name, NULL_INTERVAL); |
1ab256cb | 409 | b->name = name; |
04ae1b48 | 410 | |
67ee9f6e | 411 | b->undo_list = (SREF (name, 0) != ' ') ? Qnil : Qt; |
1ab256cb RM |
412 | |
413 | reset_buffer (b); | |
13de9290 | 414 | reset_buffer_local_variables (b, 1); |
1ab256cb | 415 | |
1f57cb74 | 416 | b->mark = Fmake_marker (); |
65745fad | 417 | BUF_MARKERS (b) = NULL; |
1f57cb74 RS |
418 | b->name = name; |
419 | ||
1ab256cb | 420 | /* Put this in the alist of all live buffers. */ |
67180c6a | 421 | XSETBUFFER (buf, b); |
1ab256cb RM |
422 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); |
423 | ||
2f064abf | 424 | /* An error in calling the function here (should someone redefine it) |
d36b182f DL |
425 | can lead to infinite regress until you run out of stack. rms |
426 | says that's not worth protecting against. */ | |
48265e61 | 427 | if (!NILP (Ffboundp (Qucs_set_table_for_input))) |
d36b182f | 428 | /* buf is on buffer-alist, so no gcpro. */ |
48265e61 DL |
429 | call1 (Qucs_set_table_for_input, buf); |
430 | ||
336cd056 RS |
431 | return buf; |
432 | } | |
433 | ||
7e9d5818 | 434 | |
04e4cb3a GM |
435 | /* Return a list of overlays which is a copy of the overlay list |
436 | LIST, but for buffer B. */ | |
437 | ||
2410d73a | 438 | static struct Lisp_Overlay * |
04e4cb3a GM |
439 | copy_overlays (b, list) |
440 | struct buffer *b; | |
2410d73a | 441 | struct Lisp_Overlay *list; |
04e4cb3a | 442 | { |
2410d73a SM |
443 | Lisp_Object buffer; |
444 | struct Lisp_Overlay *result = NULL, *tail = NULL; | |
04e4cb3a GM |
445 | |
446 | XSETBUFFER (buffer, b); | |
447 | ||
2410d73a | 448 | for (; list; list = list->next) |
04e4cb3a GM |
449 | { |
450 | Lisp_Object overlay, start, end, old_overlay; | |
27c6b98e | 451 | EMACS_INT charpos; |
04e4cb3a | 452 | |
2410d73a | 453 | XSETMISC (old_overlay, list); |
04e4cb3a GM |
454 | charpos = marker_position (OVERLAY_START (old_overlay)); |
455 | start = Fmake_marker (); | |
db3a49a6 | 456 | Fset_marker (start, make_number (charpos), buffer); |
04e4cb3a GM |
457 | XMARKER (start)->insertion_type |
458 | = XMARKER (OVERLAY_START (old_overlay))->insertion_type; | |
459 | ||
460 | charpos = marker_position (OVERLAY_END (old_overlay)); | |
461 | end = Fmake_marker (); | |
db3a49a6 | 462 | Fset_marker (end, make_number (charpos), buffer); |
04e4cb3a GM |
463 | XMARKER (end)->insertion_type |
464 | = XMARKER (OVERLAY_END (old_overlay))->insertion_type; | |
465 | ||
466 | overlay = allocate_misc (); | |
467 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; | |
468 | OVERLAY_START (overlay) = start; | |
469 | OVERLAY_END (overlay) = end; | |
470 | OVERLAY_PLIST (overlay) = Fcopy_sequence (OVERLAY_PLIST (old_overlay)); | |
2410d73a | 471 | XOVERLAY (overlay)->next = NULL; |
177c0ea7 | 472 | |
2410d73a SM |
473 | if (tail) |
474 | tail = tail->next = XOVERLAY (overlay); | |
475 | else | |
476 | result = tail = XOVERLAY (overlay); | |
04e4cb3a GM |
477 | } |
478 | ||
2410d73a | 479 | return result; |
04e4cb3a | 480 | } |
177c0ea7 | 481 | |
04e4cb3a | 482 | |
7e9d5818 GM |
483 | /* Clone per-buffer values of buffer FROM. |
484 | ||
485 | Buffer TO gets the same per-buffer values as FROM, with the | |
486 | following exceptions: (1) TO's name is left untouched, (2) markers | |
487 | are copied and made to refer to TO, and (3) overlay lists are | |
488 | copied. */ | |
489 | ||
490 | static void | |
491 | clone_per_buffer_values (from, to) | |
492 | struct buffer *from, *to; | |
493 | { | |
54622f33 | 494 | Lisp_Object to_buffer; |
7e9d5818 GM |
495 | int offset; |
496 | ||
497 | XSETBUFFER (to_buffer, to); | |
177c0ea7 | 498 | |
3ee24aec SM |
499 | /* buffer-local Lisp variables start at `undo_list', |
500 | tho only the ones from `name' on are GC'd normally. */ | |
501 | for (offset = PER_BUFFER_VAR_OFFSET (undo_list) + sizeof (Lisp_Object); | |
7e9d5818 GM |
502 | offset < sizeof *to; |
503 | offset += sizeof (Lisp_Object)) | |
504 | { | |
505 | Lisp_Object obj; | |
506 | ||
507 | obj = PER_BUFFER_VALUE (from, offset); | |
508 | if (MARKERP (obj)) | |
509 | { | |
510 | struct Lisp_Marker *m = XMARKER (obj); | |
511 | obj = Fmake_marker (); | |
512 | XMARKER (obj)->insertion_type = m->insertion_type; | |
513 | set_marker_both (obj, to_buffer, m->charpos, m->bytepos); | |
514 | } | |
515 | ||
516 | PER_BUFFER_VALUE (to, offset) = obj; | |
517 | } | |
518 | ||
7e9d5818 | 519 | bcopy (from->local_flags, to->local_flags, sizeof to->local_flags); |
177c0ea7 | 520 | |
04e4cb3a GM |
521 | to->overlays_before = copy_overlays (to, from->overlays_before); |
522 | to->overlays_after = copy_overlays (to, from->overlays_after); | |
02f28bbd | 523 | |
e1688f54 RS |
524 | /* Get (a copy of) the alist of Lisp-level local variables of FROM |
525 | and install that in TO. */ | |
526 | to->local_var_alist = buffer_lisp_local_variables (from); | |
7e9d5818 GM |
527 | } |
528 | ||
7e9d5818 GM |
529 | DEFUN ("make-indirect-buffer", Fmake_indirect_buffer, Smake_indirect_buffer, |
530 | 2, 3, | |
193c3837 | 531 | "bMake indirect buffer (to buffer): \nBName of indirect buffer: ", |
7ee72033 | 532 | doc: /* Create and return an indirect buffer for buffer BASE-BUFFER, named NAME. |
6b61353c | 533 | BASE-BUFFER should be a live buffer, or the name of an existing buffer. |
018ba359 PJ |
534 | NAME should be a string which is not the name of an existing buffer. |
535 | Optional argument CLONE non-nil means preserve BASE-BUFFER's state, | |
536 | such as major and minor modes, in the indirect buffer. | |
7ee72033 MB |
537 | CLONE nil means the indirect buffer's state is reset to default values. */) |
538 | (base_buffer, name, clone) | |
7e9d5818 | 539 | Lisp_Object base_buffer, name, clone; |
336cd056 | 540 | { |
6b61353c | 541 | Lisp_Object buf, tem; |
7e9d5818 | 542 | struct buffer *b; |
336cd056 | 543 | |
6b61353c | 544 | CHECK_STRING (name); |
336cd056 RS |
545 | buf = Fget_buffer (name); |
546 | if (!NILP (buf)) | |
d5db4077 | 547 | error ("Buffer name `%s' is in use", SDATA (name)); |
336cd056 | 548 | |
6b61353c | 549 | tem = base_buffer; |
336cd056 RS |
550 | base_buffer = Fget_buffer (base_buffer); |
551 | if (NILP (base_buffer)) | |
6b61353c KH |
552 | error ("No such buffer: `%s'", SDATA (tem)); |
553 | if (NILP (XBUFFER (base_buffer)->name)) | |
554 | error ("Base buffer has been killed"); | |
336cd056 | 555 | |
d5db4077 | 556 | if (SCHARS (name) == 0) |
336cd056 RS |
557 | error ("Empty string for buffer name is not allowed"); |
558 | ||
cc648cef | 559 | b = allocate_buffer (); |
336cd056 | 560 | |
67ee9f6e SM |
561 | b->base_buffer = (XBUFFER (base_buffer)->base_buffer |
562 | ? XBUFFER (base_buffer)->base_buffer | |
563 | : XBUFFER (base_buffer)); | |
336cd056 RS |
564 | |
565 | /* Use the base buffer's text object. */ | |
566 | b->text = b->base_buffer->text; | |
567 | ||
568 | BUF_BEGV (b) = BUF_BEGV (b->base_buffer); | |
569 | BUF_ZV (b) = BUF_ZV (b->base_buffer); | |
570 | BUF_PT (b) = BUF_PT (b->base_buffer); | |
3f236a40 RS |
571 | BUF_BEGV_BYTE (b) = BUF_BEGV_BYTE (b->base_buffer); |
572 | BUF_ZV_BYTE (b) = BUF_ZV_BYTE (b->base_buffer); | |
573 | BUF_PT_BYTE (b) = BUF_PT_BYTE (b->base_buffer); | |
336cd056 RS |
574 | |
575 | b->newline_cache = 0; | |
576 | b->width_run_cache = 0; | |
577 | b->width_table = Qnil; | |
578 | ||
579 | /* Put this on the chain of all buffers including killed ones. */ | |
580 | b->next = all_buffers; | |
581 | all_buffers = b; | |
582 | ||
583 | name = Fcopy_sequence (name); | |
ab77f05c | 584 | STRING_SET_INTERVALS (name, NULL_INTERVAL); |
336cd056 RS |
585 | b->name = name; |
586 | ||
587 | reset_buffer (b); | |
13de9290 | 588 | reset_buffer_local_variables (b, 1); |
336cd056 RS |
589 | |
590 | /* Put this in the alist of all live buffers. */ | |
591 | XSETBUFFER (buf, b); | |
592 | Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (Fcons (name, buf), Qnil)); | |
593 | ||
594 | b->mark = Fmake_marker (); | |
1ab256cb | 595 | b->name = name; |
336cd056 | 596 | |
abc9d959 RS |
597 | /* The multibyte status belongs to the base buffer. */ |
598 | b->enable_multibyte_characters = b->base_buffer->enable_multibyte_characters; | |
599 | ||
336cd056 RS |
600 | /* Make sure the base buffer has markers for its narrowing. */ |
601 | if (NILP (b->base_buffer->pt_marker)) | |
602 | { | |
603 | b->base_buffer->pt_marker = Fmake_marker (); | |
3f236a40 RS |
604 | set_marker_both (b->base_buffer->pt_marker, base_buffer, |
605 | BUF_PT (b->base_buffer), | |
606 | BUF_PT_BYTE (b->base_buffer)); | |
336cd056 RS |
607 | } |
608 | if (NILP (b->base_buffer->begv_marker)) | |
609 | { | |
610 | b->base_buffer->begv_marker = Fmake_marker (); | |
3f236a40 RS |
611 | set_marker_both (b->base_buffer->begv_marker, base_buffer, |
612 | BUF_BEGV (b->base_buffer), | |
613 | BUF_BEGV_BYTE (b->base_buffer)); | |
336cd056 RS |
614 | } |
615 | if (NILP (b->base_buffer->zv_marker)) | |
616 | { | |
617 | b->base_buffer->zv_marker = Fmake_marker (); | |
3f236a40 RS |
618 | set_marker_both (b->base_buffer->zv_marker, base_buffer, |
619 | BUF_ZV (b->base_buffer), | |
620 | BUF_ZV_BYTE (b->base_buffer)); | |
26d84681 | 621 | XMARKER (b->base_buffer->zv_marker)->insertion_type = 1; |
336cd056 RS |
622 | } |
623 | ||
7e9d5818 GM |
624 | if (NILP (clone)) |
625 | { | |
626 | /* Give the indirect buffer markers for its narrowing. */ | |
627 | b->pt_marker = Fmake_marker (); | |
628 | set_marker_both (b->pt_marker, buf, BUF_PT (b), BUF_PT_BYTE (b)); | |
629 | b->begv_marker = Fmake_marker (); | |
630 | set_marker_both (b->begv_marker, buf, BUF_BEGV (b), BUF_BEGV_BYTE (b)); | |
631 | b->zv_marker = Fmake_marker (); | |
632 | set_marker_both (b->zv_marker, buf, BUF_ZV (b), BUF_ZV_BYTE (b)); | |
633 | XMARKER (b->zv_marker)->insertion_type = 1; | |
634 | } | |
635 | else | |
7fa57e45 RS |
636 | { |
637 | struct buffer *old_b = current_buffer; | |
638 | ||
639 | clone_per_buffer_values (b->base_buffer, b); | |
640 | b->filename = Qnil; | |
641 | b->file_truename = Qnil; | |
642 | b->display_count = make_number (0); | |
643 | b->backed_up = Qnil; | |
644 | b->auto_save_file_name = Qnil; | |
645 | set_buffer_internal_1 (b); | |
646 | Fset (intern ("buffer-save-without-query"), Qnil); | |
647 | Fset (intern ("buffer-file-number"), Qnil); | |
648 | Fset (intern ("buffer-stale-function"), Qnil); | |
649 | set_buffer_internal_1 (old_b); | |
650 | } | |
336cd056 | 651 | |
a9ee7a59 | 652 | return buf; |
1ab256cb RM |
653 | } |
654 | ||
d4f5719a SM |
655 | void |
656 | delete_all_overlays (b) | |
657 | struct buffer *b; | |
658 | { | |
659 | Lisp_Object overlay; | |
660 | ||
661 | /* `reset_buffer' blindly sets the list of overlays to NULL, so we | |
662 | have to empty the list, otherwise we end up with overlays that | |
663 | think they belong to this buffer while the buffer doesn't know about | |
664 | them any more. */ | |
665 | while (b->overlays_before) | |
666 | { | |
667 | XSETMISC (overlay, b->overlays_before); | |
668 | Fdelete_overlay (overlay); | |
669 | } | |
670 | while (b->overlays_after) | |
671 | { | |
672 | XSETMISC (overlay, b->overlays_after); | |
673 | Fdelete_overlay (overlay); | |
674 | } | |
675 | eassert (b->overlays_before == NULL); | |
676 | eassert (b->overlays_after == NULL); | |
677 | } | |
678 | ||
bcd40520 | 679 | /* Reinitialize everything about a buffer except its name and contents |
6b61353c | 680 | and local variables. |
d4f5719a SM |
681 | If called on an already-initialized buffer, the list of overlays |
682 | should be deleted before calling this function, otherwise we end up | |
683 | with overlays that claim to belong to the buffer but the buffer | |
684 | claims it doesn't belong to it. */ | |
1ab256cb RM |
685 | |
686 | void | |
687 | reset_buffer (b) | |
688 | register struct buffer *b; | |
689 | { | |
690 | b->filename = Qnil; | |
f6ed2e84 | 691 | b->file_truename = Qnil; |
1ab256cb RM |
692 | b->directory = (current_buffer) ? current_buffer->directory : Qnil; |
693 | b->modtime = 0; | |
8d7a4592 | 694 | XSETFASTINT (b->save_length, 0); |
1ab256cb | 695 | b->last_window_start = 1; |
8b264726 | 696 | /* It is more conservative to start out "changed" than "unchanged". */ |
b5a225b4 GM |
697 | b->clip_changed = 0; |
698 | b->prevent_redisplay_optimizations_p = 1; | |
1ab256cb RM |
699 | b->backed_up = Qnil; |
700 | b->auto_save_modified = 0; | |
84f6bcba | 701 | b->auto_save_failure_time = -1; |
1ab256cb RM |
702 | b->auto_save_file_name = Qnil; |
703 | b->read_only = Qnil; | |
2410d73a SM |
704 | b->overlays_before = NULL; |
705 | b->overlays_after = NULL; | |
c2d5b10f | 706 | b->overlay_center = BEG; |
dfda7a7f | 707 | b->mark_active = Qnil; |
943e065b | 708 | b->point_before_scroll = Qnil; |
be9aafdd | 709 | b->file_format = Qnil; |
71ed49fa | 710 | b->auto_save_file_format = Qt; |
0dc6f165 | 711 | b->last_selected_window = Qnil; |
7962a441 | 712 | XSETINT (b->display_count, 0); |
3fd364db | 713 | b->display_time = Qnil; |
1bf08baf | 714 | b->enable_multibyte_characters = buffer_defaults.enable_multibyte_characters; |
bb2ec976 | 715 | b->cursor_type = buffer_defaults.cursor_type; |
a3bbced0 | 716 | b->extra_line_spacing = buffer_defaults.extra_line_spacing; |
0522997d RS |
717 | |
718 | b->display_error_modiff = 0; | |
1ab256cb RM |
719 | } |
720 | ||
bcd40520 RS |
721 | /* Reset buffer B's local variables info. |
722 | Don't use this on a buffer that has already been in use; | |
723 | it does not treat permanent locals consistently. | |
13de9290 RS |
724 | Instead, use Fkill_all_local_variables. |
725 | ||
3709505e | 726 | If PERMANENT_TOO is 1, then we reset permanent |
13de9290 RS |
727 | buffer-local variables. If PERMANENT_TOO is 0, |
728 | we preserve those. */ | |
bcd40520 | 729 | |
13de9290 RS |
730 | static void |
731 | reset_buffer_local_variables (b, permanent_too) | |
1ab256cb | 732 | register struct buffer *b; |
13de9290 | 733 | int permanent_too; |
1ab256cb RM |
734 | { |
735 | register int offset; | |
7c02e886 | 736 | int i; |
1ab256cb RM |
737 | |
738 | /* Reset the major mode to Fundamental, together with all the | |
739 | things that depend on the major mode. | |
740 | default-major-mode is handled at a higher level. | |
741 | We ignore it here. */ | |
742 | b->major_mode = Qfundamental_mode; | |
743 | b->keymap = Qnil; | |
1ab256cb RM |
744 | b->mode_name = QSFundamental; |
745 | b->minor_modes = Qnil; | |
3446af9c RS |
746 | |
747 | /* If the standard case table has been altered and invalidated, | |
748 | fix up its insides first. */ | |
749 | if (! (CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[0]) | |
750 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[1]) | |
751 | && CHAR_TABLE_P (XCHAR_TABLE (Vascii_downcase_table)->extras[2]))) | |
752 | Fset_standard_case_table (Vascii_downcase_table); | |
753 | ||
1ab256cb | 754 | b->downcase_table = Vascii_downcase_table; |
1e9b6335 RS |
755 | b->upcase_table = XCHAR_TABLE (Vascii_downcase_table)->extras[0]; |
756 | b->case_canon_table = XCHAR_TABLE (Vascii_downcase_table)->extras[1]; | |
757 | b->case_eqv_table = XCHAR_TABLE (Vascii_downcase_table)->extras[2]; | |
3cb719bd | 758 | b->invisibility_spec = Qt; |
2e716096 RS |
759 | #ifndef DOS_NT |
760 | b->buffer_file_type = Qnil; | |
761 | #endif | |
3cb719bd | 762 | |
13de9290 | 763 | /* Reset all (or most) per-buffer variables to their defaults. */ |
3709505e SM |
764 | if (permanent_too) |
765 | b->local_var_alist = Qnil; | |
766 | else | |
767 | { | |
2f7a359d | 768 | Lisp_Object tmp, prop, last = Qnil; |
3709505e SM |
769 | for (tmp = b->local_var_alist; CONSP (tmp); tmp = XCDR (tmp)) |
770 | if (CONSP (XCAR (tmp)) | |
771 | && SYMBOLP (XCAR (XCAR (tmp))) | |
2f7a359d RS |
772 | && !NILP (prop = Fget (XCAR (XCAR (tmp)), Qpermanent_local))) |
773 | { | |
774 | /* If permanent-local, keep it. */ | |
775 | last = tmp; | |
776 | if (EQ (prop, Qpermanent_local_hook)) | |
777 | { | |
778 | /* This is a partially permanent hook variable. | |
779 | Preserve only the elements that want to be preserved. */ | |
780 | Lisp_Object list, newlist; | |
781 | list = XCDR (XCAR (tmp)); | |
782 | if (!CONSP (list)) | |
783 | newlist = list; | |
784 | else | |
785 | for (newlist = Qnil; CONSP (list); list = XCDR (list)) | |
786 | { | |
787 | Lisp_Object elt = XCAR (list); | |
788 | /* Preserve element ELT if it's t, | |
789 | if it is a function with a `permanent-local-hook' property, | |
790 | or if it's not a symbol. */ | |
791 | if (! SYMBOLP (elt) | |
792 | || EQ (elt, Qt) | |
793 | || !NILP (Fget (elt, Qpermanent_local_hook))) | |
794 | newlist = Fcons (elt, newlist); | |
795 | } | |
796 | XSETCDR (XCAR (tmp), Fnreverse (newlist)); | |
797 | } | |
798 | } | |
799 | /* Delete this local variable. */ | |
3709505e SM |
800 | else if (NILP (last)) |
801 | b->local_var_alist = XCDR (tmp); | |
802 | else | |
803 | XSETCDR (last, XCDR (tmp)); | |
804 | } | |
805 | ||
7313acd0 | 806 | for (i = 0; i < last_per_buffer_idx; ++i) |
7c02e886 | 807 | if (permanent_too || buffer_permanent_local_flags[i] == 0) |
7313acd0 | 808 | SET_PER_BUFFER_VALUE_P (b, i, 0); |
1ab256cb RM |
809 | |
810 | /* For each slot that has a default value, | |
811 | copy that into the slot. */ | |
812 | ||
3ee24aec SM |
813 | /* buffer-local Lisp variables start at `undo_list', |
814 | tho only the ones from `name' on are GC'd normally. */ | |
815 | for (offset = PER_BUFFER_VAR_OFFSET (undo_list); | |
7c02e886 GM |
816 | offset < sizeof *b; |
817 | offset += sizeof (Lisp_Object)) | |
aab80822 | 818 | { |
7313acd0 | 819 | int idx = PER_BUFFER_IDX (offset); |
7c02e886 GM |
820 | if ((idx > 0 |
821 | && (permanent_too | |
822 | || buffer_permanent_local_flags[idx] == 0)) | |
823 | /* Is -2 used anywhere? */ | |
824 | || idx == -2) | |
7313acd0 | 825 | PER_BUFFER_VALUE (b, offset) = PER_BUFFER_DEFAULT (offset); |
aab80822 | 826 | } |
1ab256cb RM |
827 | } |
828 | ||
01050cb5 RM |
829 | /* We split this away from generate-new-buffer, because rename-buffer |
830 | and set-visited-file-name ought to be able to use this to really | |
831 | rename the buffer properly. */ | |
832 | ||
833 | DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, Sgenerate_new_buffer_name, | |
efc7e75f | 834 | 1, 2, 0, |
7ee72033 | 835 | doc: /* Return a string that is the name of no existing buffer based on NAME. |
018ba359 PJ |
836 | If there is no live buffer named NAME, then return NAME. |
837 | Otherwise modify name by appending `<NUMBER>', incrementing NUMBER | |
6b61353c | 838 | \(starting at 2) until an unused name is found, and then return that name. |
2f064abf JB |
839 | Optional second argument IGNORE specifies a name that is okay to use (if |
840 | it is in the sequence to be tried) even if a buffer with that name exists. */) | |
7ee72033 | 841 | (name, ignore) |
c273e647 | 842 | register Lisp_Object name, ignore; |
1ab256cb RM |
843 | { |
844 | register Lisp_Object gentemp, tem; | |
845 | int count; | |
846 | char number[10]; | |
847 | ||
b7826503 | 848 | CHECK_STRING (name); |
1ab256cb | 849 | |
6b61353c KH |
850 | tem = Fstring_equal (name, ignore); |
851 | if (!NILP (tem)) | |
852 | return name; | |
1ab256cb | 853 | tem = Fget_buffer (name); |
265a9e55 | 854 | if (NILP (tem)) |
01050cb5 | 855 | return name; |
1ab256cb RM |
856 | |
857 | count = 1; | |
858 | while (1) | |
859 | { | |
860 | sprintf (number, "<%d>", ++count); | |
861 | gentemp = concat2 (name, build_string (number)); | |
638e4fc3 | 862 | tem = Fstring_equal (gentemp, ignore); |
c273e647 RS |
863 | if (!NILP (tem)) |
864 | return gentemp; | |
1ab256cb | 865 | tem = Fget_buffer (gentemp); |
265a9e55 | 866 | if (NILP (tem)) |
01050cb5 | 867 | return gentemp; |
1ab256cb RM |
868 | } |
869 | } | |
870 | ||
871 | \f | |
872 | DEFUN ("buffer-name", Fbuffer_name, Sbuffer_name, 0, 1, 0, | |
7ee72033 MB |
873 | doc: /* Return the name of BUFFER, as a string. |
874 | With no argument or nil as argument, return the name of the current buffer. */) | |
875 | (buffer) | |
1ab256cb RM |
876 | register Lisp_Object buffer; |
877 | { | |
265a9e55 | 878 | if (NILP (buffer)) |
1ab256cb | 879 | return current_buffer->name; |
b7826503 | 880 | CHECK_BUFFER (buffer); |
1ab256cb RM |
881 | return XBUFFER (buffer)->name; |
882 | } | |
883 | ||
884 | DEFUN ("buffer-file-name", Fbuffer_file_name, Sbuffer_file_name, 0, 1, 0, | |
7ee72033 MB |
885 | doc: /* Return name of file BUFFER is visiting, or nil if none. |
886 | No argument or nil as argument means use the current buffer. */) | |
887 | (buffer) | |
1ab256cb RM |
888 | register Lisp_Object buffer; |
889 | { | |
265a9e55 | 890 | if (NILP (buffer)) |
1ab256cb | 891 | return current_buffer->filename; |
b7826503 | 892 | CHECK_BUFFER (buffer); |
1ab256cb RM |
893 | return XBUFFER (buffer)->filename; |
894 | } | |
895 | ||
336cd056 RS |
896 | DEFUN ("buffer-base-buffer", Fbuffer_base_buffer, Sbuffer_base_buffer, |
897 | 0, 1, 0, | |
7ee72033 | 898 | doc: /* Return the base buffer of indirect buffer BUFFER. |
5a72efd4 LT |
899 | If BUFFER is not indirect, return nil. |
900 | BUFFER defaults to the current buffer. */) | |
7ee72033 | 901 | (buffer) |
336cd056 RS |
902 | register Lisp_Object buffer; |
903 | { | |
904 | struct buffer *base; | |
905 | Lisp_Object base_buffer; | |
906 | ||
907 | if (NILP (buffer)) | |
908 | base = current_buffer->base_buffer; | |
909 | else | |
910 | { | |
b7826503 | 911 | CHECK_BUFFER (buffer); |
336cd056 RS |
912 | base = XBUFFER (buffer)->base_buffer; |
913 | } | |
914 | ||
915 | if (! base) | |
916 | return Qnil; | |
917 | XSETBUFFER (base_buffer, base); | |
918 | return base_buffer; | |
919 | } | |
920 | ||
79aa712d | 921 | DEFUN ("buffer-local-value", Fbuffer_local_value, |
177c0ea7 | 922 | Sbuffer_local_value, 2, 2, 0, |
79aa712d RS |
923 | doc: /* Return the value of VARIABLE in BUFFER. |
924 | If VARIABLE does not have a buffer-local binding in BUFFER, the value | |
5e2ad10b JB |
925 | is the default binding of the variable. */) |
926 | (variable, buffer) | |
927 | register Lisp_Object variable; | |
79aa712d RS |
928 | register Lisp_Object buffer; |
929 | { | |
930 | register struct buffer *buf; | |
931 | register Lisp_Object result; | |
932 | ||
5e2ad10b | 933 | CHECK_SYMBOL (variable); |
ae69175b | 934 | CHECK_BUFFER (buffer); |
79aa712d RS |
935 | buf = XBUFFER (buffer); |
936 | ||
e7c10f83 | 937 | variable = indirect_variable (variable); |
0e4d0c9a | 938 | |
79aa712d | 939 | /* Look in local_var_list */ |
5e2ad10b | 940 | result = Fassoc (variable, buf->local_var_alist); |
177c0ea7 | 941 | if (NILP (result)) |
79aa712d RS |
942 | { |
943 | int offset, idx; | |
944 | int found = 0; | |
945 | ||
946 | /* Look in special slots */ | |
3ee24aec SM |
947 | /* buffer-local Lisp variables start at `undo_list', |
948 | tho only the ones from `name' on are GC'd normally. */ | |
949 | for (offset = PER_BUFFER_VAR_OFFSET (undo_list); | |
79aa712d RS |
950 | offset < sizeof (struct buffer); |
951 | /* sizeof EMACS_INT == sizeof Lisp_Object */ | |
952 | offset += (sizeof (EMACS_INT))) | |
953 | { | |
954 | idx = PER_BUFFER_IDX (offset); | |
955 | if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx)) | |
177c0ea7 | 956 | && SYMBOLP (PER_BUFFER_SYMBOL (offset)) |
5e2ad10b | 957 | && EQ (PER_BUFFER_SYMBOL (offset), variable)) |
79aa712d RS |
958 | { |
959 | result = PER_BUFFER_VALUE (buf, offset); | |
960 | found = 1; | |
961 | break; | |
962 | } | |
963 | } | |
964 | ||
965 | if (!found) | |
5e2ad10b | 966 | result = Fdefault_value (variable); |
79aa712d RS |
967 | } |
968 | else | |
f0bac7de RS |
969 | { |
970 | Lisp_Object valcontents; | |
971 | Lisp_Object current_alist_element; | |
972 | ||
973 | /* What binding is loaded right now? */ | |
5e2ad10b | 974 | valcontents = SYMBOL_VALUE (variable); |
f0bac7de RS |
975 | current_alist_element |
976 | = XCAR (XBUFFER_LOCAL_VALUE (valcontents)->cdr); | |
977 | ||
978 | /* The value of the currently loaded binding is not | |
979 | stored in it, but rather in the realvalue slot. | |
980 | Store that value into the binding it belongs to | |
981 | in case that is the one we are about to use. */ | |
982 | ||
983 | Fsetcdr (current_alist_element, | |
984 | do_symval_forwarding (XBUFFER_LOCAL_VALUE (valcontents)->realvalue)); | |
985 | ||
986 | /* Now get the (perhaps updated) value out of the binding. */ | |
987 | result = XCDR (result); | |
988 | } | |
79aa712d | 989 | |
4c4dc0b0 KS |
990 | if (!EQ (result, Qunbound)) |
991 | return result; | |
79aa712d | 992 | |
4c4dc0b0 | 993 | xsignal1 (Qvoid_variable, variable); |
79aa712d RS |
994 | } |
995 | ||
e1688f54 | 996 | /* Return an alist of the Lisp-level buffer-local bindings of |
7fa57e45 | 997 | buffer BUF. That is, don't include the variables maintained |
e1688f54 RS |
998 | in special slots in the buffer object. */ |
999 | ||
1000 | static Lisp_Object | |
1001 | buffer_lisp_local_variables (buf) | |
1002 | struct buffer *buf; | |
1003 | { | |
1004 | Lisp_Object result = Qnil; | |
1005 | register Lisp_Object tail; | |
1006 | for (tail = buf->local_var_alist; CONSP (tail); tail = XCDR (tail)) | |
1007 | { | |
1008 | Lisp_Object val, elt; | |
1009 | ||
1010 | elt = XCAR (tail); | |
1011 | ||
1012 | /* Reference each variable in the alist in buf. | |
1013 | If inquiring about the current buffer, this gets the current values, | |
1014 | so store them into the alist so the alist is up to date. | |
1015 | If inquiring about some other buffer, this swaps out any values | |
1016 | for that buffer, making the alist up to date automatically. */ | |
1017 | val = find_symbol_value (XCAR (elt)); | |
1018 | /* Use the current buffer value only if buf is the current buffer. */ | |
1019 | if (buf != current_buffer) | |
1020 | val = XCDR (elt); | |
1021 | ||
1022 | /* If symbol is unbound, put just the symbol in the list. */ | |
1023 | if (EQ (val, Qunbound)) | |
1024 | result = Fcons (XCAR (elt), result); | |
1025 | /* Otherwise, put (symbol . value) in the list. */ | |
1026 | else | |
1027 | result = Fcons (Fcons (XCAR (elt), val), result); | |
1028 | } | |
1029 | ||
1030 | return result; | |
1031 | } | |
1032 | ||
1ab256cb | 1033 | DEFUN ("buffer-local-variables", Fbuffer_local_variables, |
efc7e75f | 1034 | Sbuffer_local_variables, 0, 1, 0, |
7ee72033 | 1035 | doc: /* Return an alist of variables that are buffer-local in BUFFER. |
018ba359 PJ |
1036 | Most elements look like (SYMBOL . VALUE), describing one variable. |
1037 | For a symbol that is locally unbound, just the symbol appears in the value. | |
1038 | Note that storing new VALUEs in these elements doesn't change the variables. | |
7ee72033 MB |
1039 | No argument or nil as argument means use current buffer as BUFFER. */) |
1040 | (buffer) | |
1ab256cb RM |
1041 | register Lisp_Object buffer; |
1042 | { | |
1043 | register struct buffer *buf; | |
553defa4 | 1044 | register Lisp_Object result; |
1ab256cb | 1045 | |
265a9e55 | 1046 | if (NILP (buffer)) |
1ab256cb RM |
1047 | buf = current_buffer; |
1048 | else | |
1049 | { | |
b7826503 | 1050 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1051 | buf = XBUFFER (buffer); |
1052 | } | |
1053 | ||
e1688f54 | 1054 | result = buffer_lisp_local_variables (buf); |
1ab256cb | 1055 | |
1ab256cb RM |
1056 | /* Add on all the variables stored in special slots. */ |
1057 | { | |
7c02e886 | 1058 | int offset, idx; |
1ab256cb | 1059 | |
3ee24aec SM |
1060 | /* buffer-local Lisp variables start at `undo_list', |
1061 | tho only the ones from `name' on are GC'd normally. */ | |
1062 | for (offset = PER_BUFFER_VAR_OFFSET (undo_list); | |
1ab256cb | 1063 | offset < sizeof (struct buffer); |
7c02e886 GM |
1064 | /* sizeof EMACS_INT == sizeof Lisp_Object */ |
1065 | offset += (sizeof (EMACS_INT))) | |
1ab256cb | 1066 | { |
7313acd0 GM |
1067 | idx = PER_BUFFER_IDX (offset); |
1068 | if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx)) | |
1069 | && SYMBOLP (PER_BUFFER_SYMBOL (offset))) | |
1070 | result = Fcons (Fcons (PER_BUFFER_SYMBOL (offset), | |
1071 | PER_BUFFER_VALUE (buf, offset)), | |
7c02e886 | 1072 | result); |
1ab256cb RM |
1073 | } |
1074 | } | |
553defa4 RS |
1075 | |
1076 | return result; | |
1ab256cb | 1077 | } |
1ab256cb RM |
1078 | \f |
1079 | DEFUN ("buffer-modified-p", Fbuffer_modified_p, Sbuffer_modified_p, | |
efc7e75f | 1080 | 0, 1, 0, |
7ee72033 MB |
1081 | doc: /* Return t if BUFFER was modified since its file was last read or saved. |
1082 | No argument or nil as argument means use current buffer as BUFFER. */) | |
1083 | (buffer) | |
1ab256cb RM |
1084 | register Lisp_Object buffer; |
1085 | { | |
1086 | register struct buffer *buf; | |
265a9e55 | 1087 | if (NILP (buffer)) |
1ab256cb RM |
1088 | buf = current_buffer; |
1089 | else | |
1090 | { | |
b7826503 | 1091 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1092 | buf = XBUFFER (buffer); |
1093 | } | |
1094 | ||
336cd056 | 1095 | return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil; |
1ab256cb RM |
1096 | } |
1097 | ||
1098 | DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, Sset_buffer_modified_p, | |
efc7e75f | 1099 | 1, 1, 0, |
7ee72033 MB |
1100 | doc: /* Mark current buffer as modified or unmodified according to FLAG. |
1101 | A non-nil FLAG means mark the buffer modified. */) | |
1102 | (flag) | |
1ab256cb RM |
1103 | register Lisp_Object flag; |
1104 | { | |
1105 | register int already; | |
1106 | register Lisp_Object fn; | |
8ec01c70 | 1107 | Lisp_Object buffer, window; |
1ab256cb RM |
1108 | |
1109 | #ifdef CLASH_DETECTION | |
1110 | /* If buffer becoming modified, lock the file. | |
1111 | If buffer becoming unmodified, unlock the file. */ | |
1112 | ||
60f4dd23 | 1113 | fn = current_buffer->file_truename; |
90d456d2 KH |
1114 | /* Test buffer-file-name so that binding it to nil is effective. */ |
1115 | if (!NILP (fn) && ! NILP (current_buffer->filename)) | |
1ab256cb | 1116 | { |
336cd056 | 1117 | already = SAVE_MODIFF < MODIFF; |
265a9e55 | 1118 | if (!already && !NILP (flag)) |
1ab256cb | 1119 | lock_file (fn); |
265a9e55 | 1120 | else if (already && NILP (flag)) |
1ab256cb RM |
1121 | unlock_file (fn); |
1122 | } | |
1123 | #endif /* CLASH_DETECTION */ | |
1124 | ||
336cd056 | 1125 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
177c0ea7 | 1126 | |
8ec01c70 GM |
1127 | /* Set update_mode_lines only if buffer is displayed in some window. |
1128 | Packages like jit-lock or lazy-lock preserve a buffer's modified | |
1129 | state by recording/restoring the state around blocks of code. | |
1130 | Setting update_mode_lines makes redisplay consider all windows | |
1131 | (on all frames). Stealth fontification of buffers not displayed | |
1132 | would incur additional redisplay costs if we'd set | |
1133 | update_modes_lines unconditionally. | |
1134 | ||
1135 | Ideally, I think there should be another mechanism for fontifying | |
1136 | buffers without "modifying" buffers, or redisplay should be | |
1137 | smarter about updating the `*' in mode lines. --gerd */ | |
1138 | XSETBUFFER (buffer, current_buffer); | |
1139 | window = Fget_buffer_window (buffer, Qt); | |
1140 | if (WINDOWP (window)) | |
d57b83b3 GM |
1141 | { |
1142 | ++update_mode_lines; | |
1143 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
1144 | } | |
177c0ea7 | 1145 | |
1ab256cb RM |
1146 | return flag; |
1147 | } | |
1148 | ||
a8c21b48 GM |
1149 | DEFUN ("restore-buffer-modified-p", Frestore_buffer_modified_p, |
1150 | Srestore_buffer_modified_p, 1, 1, 0, | |
42f47086 | 1151 | doc: /* Like `set-buffer-modified-p', with a difference concerning redisplay. |
018ba359 | 1152 | It is not ensured that mode lines will be updated to show the modified |
7ee72033 MB |
1153 | state of the current buffer. Use with care. */) |
1154 | (flag) | |
a8c21b48 GM |
1155 | Lisp_Object flag; |
1156 | { | |
1157 | #ifdef CLASH_DETECTION | |
1158 | Lisp_Object fn; | |
177c0ea7 | 1159 | |
a8c21b48 GM |
1160 | /* If buffer becoming modified, lock the file. |
1161 | If buffer becoming unmodified, unlock the file. */ | |
1162 | ||
1163 | fn = current_buffer->file_truename; | |
1164 | /* Test buffer-file-name so that binding it to nil is effective. */ | |
1165 | if (!NILP (fn) && ! NILP (current_buffer->filename)) | |
1166 | { | |
1167 | int already = SAVE_MODIFF < MODIFF; | |
1168 | if (!already && !NILP (flag)) | |
1169 | lock_file (fn); | |
1170 | else if (already && NILP (flag)) | |
1171 | unlock_file (fn); | |
1172 | } | |
1173 | #endif /* CLASH_DETECTION */ | |
177c0ea7 | 1174 | |
a8c21b48 GM |
1175 | SAVE_MODIFF = NILP (flag) ? MODIFF : 0; |
1176 | return flag; | |
1177 | } | |
1178 | ||
1ab256cb | 1179 | DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, Sbuffer_modified_tick, |
efc7e75f | 1180 | 0, 1, 0, |
7ee72033 | 1181 | doc: /* Return BUFFER's tick counter, incremented for each change in text. |
2f064abf JB |
1182 | Each buffer has a tick counter which is incremented each time the |
1183 | text in that buffer is changed. It wraps around occasionally. | |
7ee72033 MB |
1184 | No argument or nil as argument means use current buffer as BUFFER. */) |
1185 | (buffer) | |
1ab256cb RM |
1186 | register Lisp_Object buffer; |
1187 | { | |
1188 | register struct buffer *buf; | |
265a9e55 | 1189 | if (NILP (buffer)) |
1ab256cb RM |
1190 | buf = current_buffer; |
1191 | else | |
1192 | { | |
b7826503 | 1193 | CHECK_BUFFER (buffer); |
1ab256cb RM |
1194 | buf = XBUFFER (buffer); |
1195 | } | |
1196 | ||
1197 | return make_number (BUF_MODIFF (buf)); | |
1198 | } | |
3e145152 CY |
1199 | |
1200 | DEFUN ("buffer-chars-modified-tick", Fbuffer_chars_modified_tick, | |
1201 | Sbuffer_chars_modified_tick, 0, 1, 0, | |
1202 | doc: /* Return BUFFER's character-change tick counter. | |
1203 | Each buffer has a character-change tick counter, which is set to the | |
1204 | value of the buffer's tick counter \(see `buffer-modified-tick'), each | |
1205 | time text in that buffer is inserted or deleted. By comparing the | |
12bd42be | 1206 | values returned by two individual calls of `buffer-chars-modified-tick', |
3e145152 CY |
1207 | you can tell whether a character change occurred in that buffer in |
1208 | between these calls. No argument or nil as argument means use current | |
1209 | buffer as BUFFER. */) | |
1210 | (buffer) | |
1211 | register Lisp_Object buffer; | |
1212 | { | |
1213 | register struct buffer *buf; | |
1214 | if (NILP (buffer)) | |
1215 | buf = current_buffer; | |
1216 | else | |
1217 | { | |
1218 | CHECK_BUFFER (buffer); | |
1219 | buf = XBUFFER (buffer); | |
1220 | } | |
1221 | ||
1222 | return make_number (BUF_CHARS_MODIFF (buf)); | |
1223 | } | |
1ab256cb | 1224 | \f |
01050cb5 | 1225 | DEFUN ("rename-buffer", Frename_buffer, Srename_buffer, 1, 2, |
c7d97628 JL |
1226 | "(list (read-string \"Rename buffer (to new name): \" \ |
1227 | nil 'buffer-name-history (buffer-name (current-buffer))) \ | |
1228 | current-prefix-arg)", | |
7ee72033 | 1229 | doc: /* Change current buffer's name to NEWNAME (a string). |
018ba359 PJ |
1230 | If second arg UNIQUE is nil or omitted, it is an error if a |
1231 | buffer named NEWNAME already exists. | |
1232 | If UNIQUE is non-nil, come up with a new name using | |
1233 | `generate-new-buffer-name'. | |
1234 | Interactively, you can set UNIQUE with a prefix argument. | |
1235 | We return the name we actually gave the buffer. | |
7ee72033 MB |
1236 | This does not change the name of the visited file (if any). */) |
1237 | (newname, unique) | |
489c043a | 1238 | register Lisp_Object newname, unique; |
1ab256cb RM |
1239 | { |
1240 | register Lisp_Object tem, buf; | |
1241 | ||
b7826503 | 1242 | CHECK_STRING (newname); |
d59698c4 | 1243 | |
d5db4077 | 1244 | if (SCHARS (newname) == 0) |
d59698c4 RS |
1245 | error ("Empty string is invalid as a buffer name"); |
1246 | ||
489c043a | 1247 | tem = Fget_buffer (newname); |
265a9e55 | 1248 | if (!NILP (tem)) |
01050cb5 | 1249 | { |
8801a864 KR |
1250 | /* Don't short-circuit if UNIQUE is t. That is a useful way to |
1251 | rename the buffer automatically so you can create another | |
1252 | with the original name. It makes UNIQUE equivalent to | |
1253 | (rename-buffer (generate-new-buffer-name NEWNAME)). */ | |
1254 | if (NILP (unique) && XBUFFER (tem) == current_buffer) | |
1255 | return current_buffer->name; | |
3bd779aa | 1256 | if (!NILP (unique)) |
489c043a | 1257 | newname = Fgenerate_new_buffer_name (newname, current_buffer->name); |
01050cb5 | 1258 | else |
d5db4077 | 1259 | error ("Buffer name `%s' is in use", SDATA (newname)); |
01050cb5 | 1260 | } |
1ab256cb | 1261 | |
489c043a | 1262 | current_buffer->name = newname; |
76f590d7 JB |
1263 | |
1264 | /* Catch redisplay's attention. Unless we do this, the mode lines for | |
1265 | any windows displaying current_buffer will stay unchanged. */ | |
1266 | update_mode_lines++; | |
1267 | ||
67180c6a | 1268 | XSETBUFFER (buf, current_buffer); |
489c043a | 1269 | Fsetcar (Frassq (buf, Vbuffer_alist), newname); |
cf058e49 KH |
1270 | if (NILP (current_buffer->filename) |
1271 | && !NILP (current_buffer->auto_save_file_name)) | |
1ab256cb | 1272 | call0 (intern ("rename-auto-save-file")); |
fb5eba9c RS |
1273 | /* Refetch since that last call may have done GC. */ |
1274 | return current_buffer->name; | |
1ab256cb RM |
1275 | } |
1276 | ||
773fbdb9 | 1277 | DEFUN ("other-buffer", Fother_buffer, Sother_buffer, 0, 3, 0, |
7ee72033 | 1278 | doc: /* Return most recently selected buffer other than BUFFER. |
018ba359 PJ |
1279 | Buffers not visible in windows are preferred to visible buffers, |
1280 | unless optional second argument VISIBLE-OK is non-nil. | |
1281 | If the optional third argument FRAME is non-nil, use that frame's | |
1282 | buffer list instead of the selected frame's buffer list. | |
1283 | If no other buffer exists, the buffer `*scratch*' is returned. | |
7ee72033 MB |
1284 | If BUFFER is omitted or nil, some interesting buffer is returned. */) |
1285 | (buffer, visible_ok, frame) | |
773fbdb9 | 1286 | register Lisp_Object buffer, visible_ok, frame; |
1ab256cb | 1287 | { |
89132f25 | 1288 | Lisp_Object Fset_buffer_major_mode (); |
7962a441 | 1289 | register Lisp_Object tail, buf, notsogood, tem, pred, add_ons; |
1ab256cb RM |
1290 | notsogood = Qnil; |
1291 | ||
773fbdb9 | 1292 | if (NILP (frame)) |
9ba9623d | 1293 | frame = selected_frame; |
773fbdb9 | 1294 | |
7962a441 | 1295 | tail = Vbuffer_alist; |
773fbdb9 | 1296 | pred = frame_buffer_predicate (frame); |
7962a441 RS |
1297 | |
1298 | /* Consider buffers that have been seen in the selected frame | |
1299 | before other buffers. */ | |
177c0ea7 | 1300 | |
773fbdb9 | 1301 | tem = frame_buffer_list (frame); |
7962a441 RS |
1302 | add_ons = Qnil; |
1303 | while (CONSP (tem)) | |
1304 | { | |
7539e11f KR |
1305 | if (BUFFERP (XCAR (tem))) |
1306 | add_ons = Fcons (Fcons (Qnil, XCAR (tem)), add_ons); | |
1307 | tem = XCDR (tem); | |
7962a441 RS |
1308 | } |
1309 | tail = nconc2 (Fnreverse (add_ons), tail); | |
1310 | ||
6d70a280 | 1311 | for (; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1312 | { |
6d70a280 | 1313 | buf = Fcdr (XCAR (tail)); |
1ab256cb RM |
1314 | if (EQ (buf, buffer)) |
1315 | continue; | |
6b61353c KH |
1316 | if (NILP (buf)) |
1317 | continue; | |
1318 | if (NILP (XBUFFER (buf)->name)) | |
1319 | continue; | |
10ceceb8 | 1320 | if (SREF (XBUFFER (buf)->name, 0) == ' ') |
1ab256cb | 1321 | continue; |
04ae1b48 RS |
1322 | /* If the selected frame has a buffer_predicate, |
1323 | disregard buffers that don't fit the predicate. */ | |
7962a441 | 1324 | if (!NILP (pred)) |
04ae1b48 | 1325 | { |
7962a441 | 1326 | tem = call1 (pred, buf); |
04ae1b48 RS |
1327 | if (NILP (tem)) |
1328 | continue; | |
1329 | } | |
04ae1b48 | 1330 | |
a0ebb746 | 1331 | if (NILP (visible_ok)) |
66ffe51c | 1332 | tem = Fget_buffer_window (buf, Qvisible); |
a0ebb746 JB |
1333 | else |
1334 | tem = Qnil; | |
265a9e55 | 1335 | if (NILP (tem)) |
1ab256cb | 1336 | return buf; |
265a9e55 | 1337 | if (NILP (notsogood)) |
1ab256cb RM |
1338 | notsogood = buf; |
1339 | } | |
265a9e55 | 1340 | if (!NILP (notsogood)) |
1ab256cb | 1341 | return notsogood; |
dba1a30a GM |
1342 | buf = Fget_buffer (build_string ("*scratch*")); |
1343 | if (NILP (buf)) | |
1344 | { | |
1345 | buf = Fget_buffer_create (build_string ("*scratch*")); | |
1346 | Fset_buffer_major_mode (buf); | |
1347 | } | |
89132f25 | 1348 | return buf; |
1ab256cb RM |
1349 | } |
1350 | \f | |
1ab256cb RM |
1351 | DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, Sbuffer_enable_undo, |
1352 | 0, 1, "", | |
7ee72033 MB |
1353 | doc: /* Start keeping undo information for buffer BUFFER. |
1354 | No argument or nil as argument means do this for the current buffer. */) | |
1355 | (buffer) | |
ffd56f97 | 1356 | register Lisp_Object buffer; |
1ab256cb | 1357 | { |
ffd56f97 | 1358 | Lisp_Object real_buffer; |
1ab256cb | 1359 | |
ffd56f97 | 1360 | if (NILP (buffer)) |
67180c6a | 1361 | XSETBUFFER (real_buffer, current_buffer); |
1ab256cb RM |
1362 | else |
1363 | { | |
ffd56f97 JB |
1364 | real_buffer = Fget_buffer (buffer); |
1365 | if (NILP (real_buffer)) | |
1366 | nsberror (buffer); | |
1ab256cb RM |
1367 | } |
1368 | ||
ffd56f97 JB |
1369 | if (EQ (XBUFFER (real_buffer)->undo_list, Qt)) |
1370 | XBUFFER (real_buffer)->undo_list = Qnil; | |
1ab256cb RM |
1371 | |
1372 | return Qnil; | |
1373 | } | |
1374 | ||
1375 | /* | |
1376 | DEFVAR_LISP ("kill-buffer-hook", no_cell, "\ | |
1377 | Hook to be run (by `run-hooks', which see) when a buffer is killed.\n\ | |
1378 | The buffer being killed will be current while the hook is running.\n\ | |
1379 | See `kill-buffer'." | |
1380 | */ | |
1381 | DEFUN ("kill-buffer", Fkill_buffer, Skill_buffer, 1, 1, "bKill buffer: ", | |
7ee72033 | 1382 | doc: /* Kill the buffer BUFFER. |
f6e22881 JB |
1383 | The argument may be a buffer or the name of a buffer. |
1384 | With a nil argument, kill the current buffer. | |
018ba359 | 1385 | |
f6e22881 | 1386 | Value is t if the buffer is actually killed, nil otherwise. |
018ba359 | 1387 | |
f6e22881 JB |
1388 | The functions in `kill-buffer-query-functions' are called with BUFFER as |
1389 | the current buffer. If any of them returns nil, the buffer is not killed. | |
1390 | ||
1391 | The hook `kill-buffer-hook' is run before the buffer is actually killed. | |
1392 | The buffer being killed will be current while the hook is running. | |
018ba359 PJ |
1393 | |
1394 | Any processes that have this buffer as the `process-buffer' are killed | |
7ee72033 MB |
1395 | with SIGHUP. */) |
1396 | (buffer) | |
a25f13ae | 1397 | Lisp_Object buffer; |
1ab256cb RM |
1398 | { |
1399 | Lisp_Object buf; | |
1400 | register struct buffer *b; | |
1401 | register Lisp_Object tem; | |
1402 | register struct Lisp_Marker *m; | |
6af718a4 | 1403 | struct gcpro gcpro1; |
1ab256cb | 1404 | |
a25f13ae | 1405 | if (NILP (buffer)) |
1ab256cb RM |
1406 | buf = Fcurrent_buffer (); |
1407 | else | |
a25f13ae | 1408 | buf = Fget_buffer (buffer); |
265a9e55 | 1409 | if (NILP (buf)) |
a25f13ae | 1410 | nsberror (buffer); |
1ab256cb RM |
1411 | |
1412 | b = XBUFFER (buf); | |
1413 | ||
4a4a9db5 KH |
1414 | /* Avoid trouble for buffer already dead. */ |
1415 | if (NILP (b->name)) | |
1416 | return Qnil; | |
1417 | ||
1ab256cb | 1418 | /* Query if the buffer is still modified. */ |
265a9e55 | 1419 | if (INTERACTIVE && !NILP (b->filename) |
336cd056 | 1420 | && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b)) |
1ab256cb | 1421 | { |
a25f13ae | 1422 | GCPRO1 (buf); |
5c4930b0 RS |
1423 | tem = do_yes_or_no_p (format2 ("Buffer %s modified; kill anyway? ", |
1424 | b->name, make_number (0))); | |
1ab256cb | 1425 | UNGCPRO; |
265a9e55 | 1426 | if (NILP (tem)) |
1ab256cb RM |
1427 | return Qnil; |
1428 | } | |
1429 | ||
dcdffbf6 | 1430 | /* Run hooks with the buffer to be killed the current buffer. */ |
1ab256cb | 1431 | { |
aed13378 | 1432 | int count = SPECPDL_INDEX (); |
5b20caf0 | 1433 | Lisp_Object arglist[1]; |
1ab256cb RM |
1434 | |
1435 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1436 | set_buffer_internal (b); | |
dcdffbf6 RS |
1437 | |
1438 | /* First run the query functions; if any query is answered no, | |
1439 | don't kill the buffer. */ | |
5b20caf0 | 1440 | arglist[0] = Qkill_buffer_query_functions; |
09706e1f KR |
1441 | tem = Frun_hook_with_args_until_failure (1, arglist); |
1442 | if (NILP (tem)) | |
5b20caf0 | 1443 | return unbind_to (count, Qnil); |
dcdffbf6 RS |
1444 | |
1445 | /* Then run the hooks. */ | |
f1597a3a | 1446 | Frun_hooks (1, &Qkill_buffer_hook); |
1ab256cb RM |
1447 | unbind_to (count, Qnil); |
1448 | } | |
1449 | ||
1450 | /* We have no more questions to ask. Verify that it is valid | |
1451 | to kill the buffer. This must be done after the questions | |
1452 | since anything can happen within do_yes_or_no_p. */ | |
1453 | ||
1454 | /* Don't kill the minibuffer now current. */ | |
1455 | if (EQ (buf, XWINDOW (minibuf_window)->buffer)) | |
1456 | return Qnil; | |
1457 | ||
265a9e55 | 1458 | if (NILP (b->name)) |
1ab256cb RM |
1459 | return Qnil; |
1460 | ||
336cd056 RS |
1461 | /* When we kill a base buffer, kill all its indirect buffers. |
1462 | We do it at this stage so nothing terrible happens if they | |
1463 | ask questions or their hooks get errors. */ | |
1464 | if (! b->base_buffer) | |
1465 | { | |
1466 | struct buffer *other; | |
1467 | ||
1468 | GCPRO1 (buf); | |
1469 | ||
1470 | for (other = all_buffers; other; other = other->next) | |
4a4a9db5 KH |
1471 | /* all_buffers contains dead buffers too; |
1472 | don't re-kill them. */ | |
1473 | if (other->base_buffer == b && !NILP (other->name)) | |
336cd056 RS |
1474 | { |
1475 | Lisp_Object buf; | |
1476 | XSETBUFFER (buf, other); | |
1477 | Fkill_buffer (buf); | |
1478 | } | |
1479 | ||
1480 | UNGCPRO; | |
1481 | } | |
177c0ea7 | 1482 | |
1ab256cb RM |
1483 | /* Make this buffer not be current. |
1484 | In the process, notice if this is the sole visible buffer | |
1485 | and give up if so. */ | |
1486 | if (b == current_buffer) | |
1487 | { | |
773fbdb9 | 1488 | tem = Fother_buffer (buf, Qnil, Qnil); |
1ab256cb RM |
1489 | Fset_buffer (tem); |
1490 | if (b == current_buffer) | |
1491 | return Qnil; | |
1492 | } | |
1493 | ||
77270fac GM |
1494 | /* Notice if the buffer to kill is the sole visible buffer |
1495 | when we're currently in the mini-buffer, and give up if so. */ | |
1496 | XSETBUFFER (tem, current_buffer); | |
1497 | if (EQ (tem, XWINDOW (minibuf_window)->buffer)) | |
1498 | { | |
1499 | tem = Fother_buffer (buf, Qnil, Qnil); | |
77270fac GM |
1500 | if (EQ (buf, tem)) |
1501 | return Qnil; | |
1502 | } | |
1503 | ||
1ab256cb RM |
1504 | /* Now there is no question: we can kill the buffer. */ |
1505 | ||
1506 | #ifdef CLASH_DETECTION | |
1507 | /* Unlock this buffer's file, if it is locked. */ | |
1508 | unlock_buffer (b); | |
1509 | #endif /* CLASH_DETECTION */ | |
1510 | ||
49da74e6 | 1511 | GCPRO1 (buf); |
1ab256cb | 1512 | kill_buffer_processes (buf); |
49da74e6 KS |
1513 | UNGCPRO; |
1514 | ||
1515 | /* Killing buffer processes may run sentinels which may | |
1516 | have called kill-buffer. */ | |
1517 | ||
1518 | if (NILP (b->name)) | |
1519 | return Qnil; | |
1520 | ||
b93fb365 | 1521 | clear_charpos_cache (b); |
1ab256cb RM |
1522 | |
1523 | tem = Vinhibit_quit; | |
1524 | Vinhibit_quit = Qt; | |
00550f94 | 1525 | replace_buffer_in_all_windows (buf); |
b26dd9cb | 1526 | Vbuffer_alist = Fdelq (Frassq (buf, Vbuffer_alist), Vbuffer_alist); |
7962a441 | 1527 | frames_discard_buffer (buf); |
1ab256cb RM |
1528 | Vinhibit_quit = tem; |
1529 | ||
9cf712eb RS |
1530 | /* Delete any auto-save file, if we saved it in this session. |
1531 | But not if the buffer is modified. */ | |
a7a60ce9 | 1532 | if (STRINGP (b->auto_save_file_name) |
e95a0b39 | 1533 | && b->auto_save_modified != 0 |
9cf712eb | 1534 | && BUF_SAVE_MODIFF (b) < b->auto_save_modified |
6b61353c KH |
1535 | && BUF_SAVE_MODIFF (b) < BUF_MODIFF (b) |
1536 | && NILP (Fsymbol_value (intern ("auto-save-visited-file-name")))) | |
1ab256cb RM |
1537 | { |
1538 | Lisp_Object tem; | |
1539 | tem = Fsymbol_value (intern ("delete-auto-save-files")); | |
265a9e55 | 1540 | if (! NILP (tem)) |
cbb6a418 | 1541 | internal_delete_file (b->auto_save_file_name); |
1ab256cb RM |
1542 | } |
1543 | ||
4a4a9db5 KH |
1544 | if (b->base_buffer) |
1545 | { | |
1546 | /* Unchain all markers that belong to this indirect buffer. | |
1547 | Don't unchain the markers that belong to the base buffer | |
1548 | or its other indirect buffers. */ | |
65745fad | 1549 | for (m = BUF_MARKERS (b); m; ) |
4a4a9db5 | 1550 | { |
65745fad | 1551 | struct Lisp_Marker *next = m->next; |
4a4a9db5 | 1552 | if (m->buffer == b) |
65745fad SM |
1553 | unchain_marker (m); |
1554 | m = next; | |
4a4a9db5 KH |
1555 | } |
1556 | } | |
1557 | else | |
1ab256cb | 1558 | { |
4a4a9db5 | 1559 | /* Unchain all markers of this buffer and its indirect buffers. |
336cd056 | 1560 | and leave them pointing nowhere. */ |
65745fad | 1561 | for (m = BUF_MARKERS (b); m; ) |
336cd056 | 1562 | { |
65745fad | 1563 | struct Lisp_Marker *next = m->next; |
336cd056 | 1564 | m->buffer = 0; |
65745fad SM |
1565 | m->next = NULL; |
1566 | m = next; | |
336cd056 | 1567 | } |
65745fad | 1568 | BUF_MARKERS (b) = NULL; |
336cd056 | 1569 | BUF_INTERVALS (b) = NULL_INTERVAL; |
336cd056 RS |
1570 | |
1571 | /* Perhaps we should explicitly free the interval tree here... */ | |
1572 | } | |
33f7013e | 1573 | |
2f3f993b RS |
1574 | /* Reset the local variables, so that this buffer's local values |
1575 | won't be protected from GC. They would be protected | |
1576 | if they happened to remain encached in their symbols. | |
1577 | This gets rid of them for certain. */ | |
1578 | swap_out_buffer_local_variables (b); | |
13de9290 | 1579 | reset_buffer_local_variables (b, 1); |
2f3f993b | 1580 | |
1ab256cb | 1581 | b->name = Qnil; |
336cd056 | 1582 | |
9ac0d9e0 | 1583 | BLOCK_INPUT; |
336cd056 | 1584 | if (! b->base_buffer) |
b86af064 | 1585 | free_buffer_text (b); |
336cd056 | 1586 | |
28e969dd JB |
1587 | if (b->newline_cache) |
1588 | { | |
1589 | free_region_cache (b->newline_cache); | |
1590 | b->newline_cache = 0; | |
1591 | } | |
1592 | if (b->width_run_cache) | |
1593 | { | |
1594 | free_region_cache (b->width_run_cache); | |
1595 | b->width_run_cache = 0; | |
1596 | } | |
1597 | b->width_table = Qnil; | |
9ac0d9e0 | 1598 | UNBLOCK_INPUT; |
1ab256cb RM |
1599 | b->undo_list = Qnil; |
1600 | ||
1601 | return Qt; | |
1602 | } | |
1603 | \f | |
36a8c287 JB |
1604 | /* Move the assoc for buffer BUF to the front of buffer-alist. Since |
1605 | we do this each time BUF is selected visibly, the more recently | |
1606 | selected buffers are always closer to the front of the list. This | |
1607 | means that other_buffer is more likely to choose a relevant buffer. */ | |
1ab256cb | 1608 | |
01136e9b | 1609 | void |
1ab256cb RM |
1610 | record_buffer (buf) |
1611 | Lisp_Object buf; | |
1612 | { | |
1613 | register Lisp_Object link, prev; | |
773fbdb9 | 1614 | Lisp_Object frame; |
9ba9623d | 1615 | frame = selected_frame; |
1ab256cb RM |
1616 | |
1617 | prev = Qnil; | |
7539e11f | 1618 | for (link = Vbuffer_alist; CONSP (link); link = XCDR (link)) |
1ab256cb | 1619 | { |
7539e11f | 1620 | if (EQ (XCDR (XCAR (link)), buf)) |
1ab256cb RM |
1621 | break; |
1622 | prev = link; | |
1623 | } | |
1624 | ||
36a8c287 JB |
1625 | /* Effectively do Vbuffer_alist = Fdelq (link, Vbuffer_alist); |
1626 | we cannot use Fdelq itself here because it allows quitting. */ | |
1ab256cb | 1627 | |
265a9e55 | 1628 | if (NILP (prev)) |
7539e11f | 1629 | Vbuffer_alist = XCDR (Vbuffer_alist); |
1ab256cb | 1630 | else |
f3fbd155 | 1631 | XSETCDR (prev, XCDR (XCDR (prev))); |
177c0ea7 | 1632 | |
f3fbd155 | 1633 | XSETCDR (link, Vbuffer_alist); |
1ab256cb | 1634 | Vbuffer_alist = link; |
7962a441 | 1635 | |
a18b8cb5 KL |
1636 | /* Effectively do a delq on buried_buffer_list. */ |
1637 | ||
1638 | prev = Qnil; | |
1639 | for (link = XFRAME (frame)->buried_buffer_list; CONSP (link); | |
1640 | link = XCDR (link)) | |
1641 | { | |
1642 | if (EQ (XCAR (link), buf)) | |
1643 | { | |
1644 | if (NILP (prev)) | |
1645 | XFRAME (frame)->buried_buffer_list = XCDR (link); | |
1646 | else | |
1647 | XSETCDR (prev, XCDR (XCDR (prev))); | |
1648 | break; | |
1649 | } | |
1650 | prev = link; | |
1651 | } | |
1652 | ||
7962a441 RS |
1653 | /* Now move this buffer to the front of frame_buffer_list also. */ |
1654 | ||
1655 | prev = Qnil; | |
773fbdb9 | 1656 | for (link = frame_buffer_list (frame); CONSP (link); |
7539e11f | 1657 | link = XCDR (link)) |
7962a441 | 1658 | { |
7539e11f | 1659 | if (EQ (XCAR (link), buf)) |
7962a441 RS |
1660 | break; |
1661 | prev = link; | |
1662 | } | |
1663 | ||
1664 | /* Effectively do delq. */ | |
1665 | ||
1666 | if (CONSP (link)) | |
1667 | { | |
1668 | if (NILP (prev)) | |
773fbdb9 | 1669 | set_frame_buffer_list (frame, |
7539e11f | 1670 | XCDR (frame_buffer_list (frame))); |
7962a441 | 1671 | else |
f3fbd155 | 1672 | XSETCDR (prev, XCDR (XCDR (prev))); |
177c0ea7 | 1673 | |
f3fbd155 | 1674 | XSETCDR (link, frame_buffer_list (frame)); |
773fbdb9 | 1675 | set_frame_buffer_list (frame, link); |
7962a441 RS |
1676 | } |
1677 | else | |
773fbdb9 | 1678 | set_frame_buffer_list (frame, Fcons (buf, frame_buffer_list (frame))); |
1ab256cb RM |
1679 | } |
1680 | ||
a9ee7a59 | 1681 | DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode, Sset_buffer_major_mode, 1, 1, 0, |
7ee72033 | 1682 | doc: /* Set an appropriate major mode for BUFFER. |
864b90c9 | 1683 | For the *scratch* buffer, use `initial-major-mode', otherwise choose a mode |
71a0f2c6 | 1684 | according to `default-major-mode'. |
018ba359 | 1685 | Use this function before selecting the buffer, since it may need to inspect |
7ee72033 MB |
1686 | the current buffer's major mode. */) |
1687 | (buffer) | |
a2428fa2 | 1688 | Lisp_Object buffer; |
a9ee7a59 KH |
1689 | { |
1690 | int count; | |
1691 | Lisp_Object function; | |
1692 | ||
ea4fddd8 JB |
1693 | CHECK_BUFFER (buffer); |
1694 | ||
71a0f2c6 | 1695 | if (STRINGP (XBUFFER (buffer)->name) |
d5db4077 | 1696 | && strcmp (SDATA (XBUFFER (buffer)->name), "*scratch*") == 0) |
71a0f2c6 GM |
1697 | function = find_symbol_value (intern ("initial-major-mode")); |
1698 | else | |
1699 | { | |
1700 | function = buffer_defaults.major_mode; | |
1701 | if (NILP (function) | |
1702 | && NILP (Fget (current_buffer->major_mode, Qmode_class))) | |
1703 | function = current_buffer->major_mode; | |
1704 | } | |
177c0ea7 | 1705 | |
48265e61 DL |
1706 | if (NILP (function) || EQ (function, Qfundamental_mode)) |
1707 | return Qnil; | |
1708 | ||
aed13378 | 1709 | count = SPECPDL_INDEX (); |
a9ee7a59 | 1710 | |
48265e61 DL |
1711 | /* To select a nonfundamental mode, |
1712 | select the buffer temporarily and then call the mode function. */ | |
a9ee7a59 KH |
1713 | |
1714 | record_unwind_protect (save_excursion_restore, save_excursion_save ()); | |
1715 | ||
a2428fa2 | 1716 | Fset_buffer (buffer); |
48265e61 | 1717 | call0 (function); |
a9ee7a59 KH |
1718 | |
1719 | return unbind_to (count, Qnil); | |
1720 | } | |
1721 | ||
2594e0fd RS |
1722 | /* If switching buffers in WINDOW would be an error, return |
1723 | a C string saying what the error would be. */ | |
1724 | ||
1725 | char * | |
1726 | no_switch_window (window) | |
1727 | Lisp_Object window; | |
1ab256cb | 1728 | { |
1ab256cb | 1729 | Lisp_Object tem; |
2594e0fd RS |
1730 | if (EQ (minibuf_window, window)) |
1731 | return "Cannot switch buffers in minibuffer window"; | |
1732 | tem = Fwindow_dedicated_p (window); | |
c01d0677 | 1733 | if (EQ (tem, Qt)) |
2594e0fd RS |
1734 | return "Cannot switch buffers in a dedicated window"; |
1735 | return NULL; | |
1736 | } | |
1737 | ||
1738 | /* Switch to buffer BUFFER in the selected window. | |
1739 | If NORECORD is non-nil, don't call record_buffer. */ | |
1740 | ||
1741 | Lisp_Object | |
1742 | switch_to_buffer_1 (buffer, norecord) | |
1743 | Lisp_Object buffer, norecord; | |
1744 | { | |
1745 | register Lisp_Object buf; | |
1ab256cb | 1746 | |
a25f13ae | 1747 | if (NILP (buffer)) |
773fbdb9 | 1748 | buf = Fother_buffer (Fcurrent_buffer (), Qnil, Qnil); |
1ab256cb | 1749 | else |
a9ee7a59 | 1750 | { |
a25f13ae | 1751 | buf = Fget_buffer (buffer); |
a9ee7a59 KH |
1752 | if (NILP (buf)) |
1753 | { | |
a25f13ae | 1754 | buf = Fget_buffer_create (buffer); |
a9ee7a59 KH |
1755 | Fset_buffer_major_mode (buf); |
1756 | } | |
1757 | } | |
1ab256cb | 1758 | Fset_buffer (buf); |
265a9e55 | 1759 | if (NILP (norecord)) |
1ab256cb RM |
1760 | record_buffer (buf); |
1761 | ||
1762 | Fset_window_buffer (EQ (selected_window, minibuf_window) | |
5fcd022d JB |
1763 | ? Fnext_window (minibuf_window, Qnil, Qnil) |
1764 | : selected_window, | |
2ad8731a | 1765 | buf, Qnil); |
1ab256cb | 1766 | |
cd0c235a | 1767 | return buf; |
1ab256cb RM |
1768 | } |
1769 | ||
2594e0fd | 1770 | DEFUN ("switch-to-buffer", Fswitch_to_buffer, Sswitch_to_buffer, 1, 2, "BSwitch to buffer: ", |
7ee72033 | 1771 | doc: /* Select buffer BUFFER in the current window. |
a6dced2a LT |
1772 | If BUFFER does not identify an existing buffer, |
1773 | then this function creates a buffer with that name. | |
1774 | ||
1775 | When called from Lisp, BUFFER may be a buffer, a string \(a buffer name), | |
1776 | or nil. If BUFFER is nil, then this function chooses a buffer | |
1777 | using `other-buffer'. | |
018ba359 PJ |
1778 | Optional second arg NORECORD non-nil means |
1779 | do not put this buffer at the front of the list of recently selected ones. | |
a6dced2a | 1780 | This function returns the buffer it switched to. |
018ba359 PJ |
1781 | |
1782 | WARNING: This is NOT the way to work on another buffer temporarily | |
1783 | within a Lisp program! Use `set-buffer' instead. That avoids messing with | |
7ee72033 MB |
1784 | the window-buffer correspondences. */) |
1785 | (buffer, norecord) | |
2594e0fd RS |
1786 | Lisp_Object buffer, norecord; |
1787 | { | |
1788 | char *err; | |
1789 | ||
27c6b98e | 1790 | if (EQ (buffer, Fwindow_buffer (selected_window))) |
fab45703 | 1791 | { |
611ac521 RS |
1792 | /* Basically a NOP. Avoid signalling an error in the case where |
1793 | the selected window is dedicated, or a minibuffer. */ | |
1794 | ||
1795 | /* But do put this buffer at the front of the buffer list, | |
1796 | unless that has been inhibited. Note that even if | |
1797 | BUFFER is at the front of the main buffer-list already, | |
1798 | we still want to move it to the front of the frame's buffer list. */ | |
1799 | if (NILP (norecord)) | |
fab45703 | 1800 | record_buffer (buffer); |
fab45703 NR |
1801 | return Fset_buffer (buffer); |
1802 | } | |
27c6b98e | 1803 | |
2594e0fd RS |
1804 | err = no_switch_window (selected_window); |
1805 | if (err) error (err); | |
1806 | ||
1807 | return switch_to_buffer_1 (buffer, norecord); | |
1808 | } | |
1809 | ||
cd0c235a | 1810 | DEFUN ("pop-to-buffer", Fpop_to_buffer, Spop_to_buffer, 1, 3, 0, |
7ee72033 | 1811 | doc: /* Select buffer BUFFER in some window, preferably a different one. |
a6dced2a LT |
1812 | BUFFER may be a buffer, a string \(a buffer name), or nil. |
1813 | If BUFFER is a string which is not the name of an existing buffer, | |
1814 | then this function creates a buffer with that name. | |
1815 | If BUFFER is nil, then it chooses some other buffer. | |
018ba359 | 1816 | If `pop-up-windows' is non-nil, windows can be split to do this. |
e198ba87 | 1817 | If optional second arg OTHER-WINDOW is non-nil, insist on finding another |
6b61353c KH |
1818 | window even if BUFFER is already visible in the selected window, |
1819 | and ignore `same-window-regexps' and `same-window-buffer-names'. | |
a6dced2a | 1820 | This function returns the buffer it switched to. |
018ba359 PJ |
1821 | This uses the function `display-buffer' as a subroutine; see the documentation |
1822 | of `display-buffer' for additional customization information. | |
1823 | ||
1824 | Optional third arg NORECORD non-nil means | |
7ee72033 MB |
1825 | do not put this buffer at the front of the list of recently selected ones. */) |
1826 | (buffer, other_window, norecord) | |
6d12711f | 1827 | Lisp_Object buffer, other_window, norecord; |
1ab256cb RM |
1828 | { |
1829 | register Lisp_Object buf; | |
a25f13ae | 1830 | if (NILP (buffer)) |
773fbdb9 | 1831 | buf = Fother_buffer (Fcurrent_buffer (), Qnil, Qnil); |
1ab256cb | 1832 | else |
7c2087ee | 1833 | { |
a25f13ae | 1834 | buf = Fget_buffer (buffer); |
7c2087ee RS |
1835 | if (NILP (buf)) |
1836 | { | |
a25f13ae | 1837 | buf = Fget_buffer_create (buffer); |
7c2087ee RS |
1838 | Fset_buffer_major_mode (buf); |
1839 | } | |
1840 | } | |
1ab256cb | 1841 | Fset_buffer (buf); |
f1321dc3 | 1842 | Fselect_window (Fdisplay_buffer (buf, other_window, Qnil), norecord); |
e8b3a22d | 1843 | return buf; |
1ab256cb RM |
1844 | } |
1845 | ||
1846 | DEFUN ("current-buffer", Fcurrent_buffer, Scurrent_buffer, 0, 0, 0, | |
7ee72033 MB |
1847 | doc: /* Return the current buffer as a Lisp object. */) |
1848 | () | |
1ab256cb RM |
1849 | { |
1850 | register Lisp_Object buf; | |
67180c6a | 1851 | XSETBUFFER (buf, current_buffer); |
1ab256cb RM |
1852 | return buf; |
1853 | } | |
1854 | \f | |
7ec44ec6 GM |
1855 | /* Set the current buffer to B. |
1856 | ||
1857 | We previously set windows_or_buffers_changed here to invalidate | |
1858 | global unchanged information in beg_unchanged and end_unchanged. | |
1859 | This is no longer necessary because we now compute unchanged | |
1860 | information on a buffer-basis. Every action affecting other | |
1861 | windows than the selected one requires a select_window at some | |
1862 | time, and that increments windows_or_buffers_changed. */ | |
1ab256cb RM |
1863 | |
1864 | void | |
1865 | set_buffer_internal (b) | |
1866 | register struct buffer *b; | |
1867 | { | |
b5a225b4 | 1868 | if (current_buffer != b) |
7ec44ec6 | 1869 | set_buffer_internal_1 (b); |
c7aa5005 KH |
1870 | } |
1871 | ||
1872 | /* Set the current buffer to B, and do not set windows_or_buffers_changed. | |
1873 | This is used by redisplay. */ | |
1874 | ||
1875 | void | |
1876 | set_buffer_internal_1 (b) | |
1877 | register struct buffer *b; | |
1878 | { | |
1879 | register struct buffer *old_buf; | |
1880 | register Lisp_Object tail, valcontents; | |
1881 | Lisp_Object tem; | |
1882 | ||
b86af064 | 1883 | #ifdef USE_MMAP_FOR_BUFFERS |
684b01ee | 1884 | if (b->text->beg == NULL) |
b86af064 GM |
1885 | enlarge_buffer_text (b, 0); |
1886 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
177c0ea7 | 1887 | |
c7aa5005 KH |
1888 | if (current_buffer == b) |
1889 | return; | |
1890 | ||
1ab256cb RM |
1891 | old_buf = current_buffer; |
1892 | current_buffer = b; | |
1893 | last_known_column_point = -1; /* invalidate indentation cache */ | |
1894 | ||
336cd056 RS |
1895 | if (old_buf) |
1896 | { | |
1897 | /* Put the undo list back in the base buffer, so that it appears | |
1898 | that an indirect buffer shares the undo list of its base. */ | |
1899 | if (old_buf->base_buffer) | |
1900 | old_buf->base_buffer->undo_list = old_buf->undo_list; | |
1901 | ||
1902 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1903 | when it is not current, update them now. */ | |
1904 | if (! NILP (old_buf->pt_marker)) | |
1905 | { | |
1906 | Lisp_Object obuf; | |
1907 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1908 | set_marker_both (old_buf->pt_marker, obuf, |
1909 | BUF_PT (old_buf), BUF_PT_BYTE (old_buf)); | |
336cd056 RS |
1910 | } |
1911 | if (! NILP (old_buf->begv_marker)) | |
1912 | { | |
1913 | Lisp_Object obuf; | |
1914 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1915 | set_marker_both (old_buf->begv_marker, obuf, |
1916 | BUF_BEGV (old_buf), BUF_BEGV_BYTE (old_buf)); | |
336cd056 RS |
1917 | } |
1918 | if (! NILP (old_buf->zv_marker)) | |
1919 | { | |
1920 | Lisp_Object obuf; | |
1921 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
1922 | set_marker_both (old_buf->zv_marker, obuf, |
1923 | BUF_ZV (old_buf), BUF_ZV_BYTE (old_buf)); | |
336cd056 RS |
1924 | } |
1925 | } | |
1926 | ||
1927 | /* Get the undo list from the base buffer, so that it appears | |
1928 | that an indirect buffer shares the undo list of its base. */ | |
1929 | if (b->base_buffer) | |
1930 | b->undo_list = b->base_buffer->undo_list; | |
1931 | ||
1932 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
1933 | when it is not current, fetch them now. */ | |
1934 | if (! NILP (b->pt_marker)) | |
3f236a40 RS |
1935 | { |
1936 | BUF_PT (b) = marker_position (b->pt_marker); | |
1937 | BUF_PT_BYTE (b) = marker_byte_position (b->pt_marker); | |
1938 | } | |
336cd056 | 1939 | if (! NILP (b->begv_marker)) |
3f236a40 RS |
1940 | { |
1941 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
1942 | BUF_BEGV_BYTE (b) = marker_byte_position (b->begv_marker); | |
1943 | } | |
336cd056 | 1944 | if (! NILP (b->zv_marker)) |
3f236a40 RS |
1945 | { |
1946 | BUF_ZV (b) = marker_position (b->zv_marker); | |
1947 | BUF_ZV_BYTE (b) = marker_byte_position (b->zv_marker); | |
1948 | } | |
336cd056 | 1949 | |
1ab256cb RM |
1950 | /* Look down buffer's list of local Lisp variables |
1951 | to find and update any that forward into C variables. */ | |
1952 | ||
65745fad | 1953 | for (tail = b->local_var_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1954 | { |
f5c1dd0d | 1955 | valcontents = SYMBOL_VALUE (XCAR (XCAR (tail))); |
67ee9f6e | 1956 | if ((BUFFER_LOCAL_VALUEP (valcontents)) |
3d871c85 | 1957 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->realvalue, |
a7a60ce9 | 1958 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
1ab256cb RM |
1959 | /* Just reference the variable |
1960 | to cause it to become set for this buffer. */ | |
7539e11f | 1961 | Fsymbol_value (XCAR (XCAR (tail))); |
1ab256cb RM |
1962 | } |
1963 | ||
1964 | /* Do the same with any others that were local to the previous buffer */ | |
1965 | ||
1966 | if (old_buf) | |
65745fad | 1967 | for (tail = old_buf->local_var_alist; CONSP (tail); tail = XCDR (tail)) |
1ab256cb | 1968 | { |
f5c1dd0d | 1969 | valcontents = SYMBOL_VALUE (XCAR (XCAR (tail))); |
67ee9f6e | 1970 | if ((BUFFER_LOCAL_VALUEP (valcontents)) |
3d871c85 | 1971 | && (tem = XBUFFER_LOCAL_VALUE (valcontents)->realvalue, |
a7a60ce9 | 1972 | (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem)))) |
1ab256cb RM |
1973 | /* Just reference the variable |
1974 | to cause it to become set for this buffer. */ | |
7539e11f | 1975 | Fsymbol_value (XCAR (XCAR (tail))); |
1ab256cb RM |
1976 | } |
1977 | } | |
1978 | ||
336cd056 | 1979 | /* Switch to buffer B temporarily for redisplay purposes. |
bbbe9545 | 1980 | This avoids certain things that don't need to be done within redisplay. */ |
336cd056 RS |
1981 | |
1982 | void | |
1983 | set_buffer_temp (b) | |
1984 | struct buffer *b; | |
1985 | { | |
1986 | register struct buffer *old_buf; | |
1987 | ||
1988 | if (current_buffer == b) | |
1989 | return; | |
1990 | ||
1991 | old_buf = current_buffer; | |
1992 | current_buffer = b; | |
1993 | ||
1994 | if (old_buf) | |
1995 | { | |
1996 | /* If the old current buffer has markers to record PT, BEGV and ZV | |
1997 | when it is not current, update them now. */ | |
1998 | if (! NILP (old_buf->pt_marker)) | |
1999 | { | |
2000 | Lisp_Object obuf; | |
2001 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
2002 | set_marker_both (old_buf->pt_marker, obuf, |
2003 | BUF_PT (old_buf), BUF_PT_BYTE (old_buf)); | |
336cd056 RS |
2004 | } |
2005 | if (! NILP (old_buf->begv_marker)) | |
2006 | { | |
2007 | Lisp_Object obuf; | |
2008 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
2009 | set_marker_both (old_buf->begv_marker, obuf, |
2010 | BUF_BEGV (old_buf), BUF_BEGV_BYTE (old_buf)); | |
336cd056 RS |
2011 | } |
2012 | if (! NILP (old_buf->zv_marker)) | |
2013 | { | |
2014 | Lisp_Object obuf; | |
2015 | XSETBUFFER (obuf, old_buf); | |
3f236a40 RS |
2016 | set_marker_both (old_buf->zv_marker, obuf, |
2017 | BUF_ZV (old_buf), BUF_ZV_BYTE (old_buf)); | |
336cd056 RS |
2018 | } |
2019 | } | |
2020 | ||
2021 | /* If the new current buffer has markers to record PT, BEGV and ZV | |
2022 | when it is not current, fetch them now. */ | |
2023 | if (! NILP (b->pt_marker)) | |
3f236a40 RS |
2024 | { |
2025 | BUF_PT (b) = marker_position (b->pt_marker); | |
2026 | BUF_PT_BYTE (b) = marker_byte_position (b->pt_marker); | |
2027 | } | |
336cd056 | 2028 | if (! NILP (b->begv_marker)) |
3f236a40 RS |
2029 | { |
2030 | BUF_BEGV (b) = marker_position (b->begv_marker); | |
2031 | BUF_BEGV_BYTE (b) = marker_byte_position (b->begv_marker); | |
2032 | } | |
336cd056 | 2033 | if (! NILP (b->zv_marker)) |
3f236a40 RS |
2034 | { |
2035 | BUF_ZV (b) = marker_position (b->zv_marker); | |
2036 | BUF_ZV_BYTE (b) = marker_byte_position (b->zv_marker); | |
2037 | } | |
336cd056 RS |
2038 | } |
2039 | ||
1ab256cb | 2040 | DEFUN ("set-buffer", Fset_buffer, Sset_buffer, 1, 1, 0, |
7ee72033 | 2041 | doc: /* Make the buffer BUFFER current for editing operations. |
018ba359 PJ |
2042 | BUFFER may be a buffer or the name of an existing buffer. |
2043 | See also `save-excursion' when you want to make a buffer current temporarily. | |
2044 | This function does not display the buffer, so its effect ends | |
2045 | when the current command terminates. | |
7ee72033 MB |
2046 | Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently. */) |
2047 | (buffer) | |
a25f13ae | 2048 | register Lisp_Object buffer; |
1ab256cb | 2049 | { |
a25f13ae KH |
2050 | register Lisp_Object buf; |
2051 | buf = Fget_buffer (buffer); | |
2052 | if (NILP (buf)) | |
2053 | nsberror (buffer); | |
2054 | if (NILP (XBUFFER (buf)->name)) | |
1ab256cb | 2055 | error ("Selecting deleted buffer"); |
a25f13ae KH |
2056 | set_buffer_internal (XBUFFER (buf)); |
2057 | return buf; | |
1ab256cb | 2058 | } |
d0628b06 RS |
2059 | |
2060 | /* Set the current buffer to BUFFER provided it is alive. */ | |
2061 | ||
2062 | Lisp_Object | |
2063 | set_buffer_if_live (buffer) | |
2064 | Lisp_Object buffer; | |
2065 | { | |
2066 | if (! NILP (XBUFFER (buffer)->name)) | |
2067 | Fset_buffer (buffer); | |
2068 | return Qnil; | |
2069 | } | |
1ab256cb RM |
2070 | \f |
2071 | DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, | |
2072 | Sbarf_if_buffer_read_only, 0, 0, 0, | |
7ee72033 MB |
2073 | doc: /* Signal a `buffer-read-only' error if the current buffer is read-only. */) |
2074 | () | |
1ab256cb | 2075 | { |
a96b68f1 RS |
2076 | if (!NILP (current_buffer->read_only) |
2077 | && NILP (Vinhibit_read_only)) | |
4c4dc0b0 | 2078 | xsignal1 (Qbuffer_read_only, Fcurrent_buffer ()); |
1ab256cb RM |
2079 | return Qnil; |
2080 | } | |
2081 | ||
2082 | DEFUN ("bury-buffer", Fbury_buffer, Sbury_buffer, 0, 1, "", | |
7ee72033 | 2083 | doc: /* Put BUFFER at the end of the list of all buffers. |
018ba359 PJ |
2084 | There it is the least likely candidate for `other-buffer' to return; |
2085 | thus, the least likely buffer for \\[switch-to-buffer] to select by default. | |
39971188 | 2086 | You can specify a buffer name as BUFFER, or an actual buffer object. |
018ba359 PJ |
2087 | If BUFFER is nil or omitted, bury the current buffer. |
2088 | Also, if BUFFER is nil or omitted, remove the current buffer from the | |
7ee72033 MB |
2089 | selected window if it is displayed there. */) |
2090 | (buffer) | |
a2428fa2 | 2091 | register Lisp_Object buffer; |
1ab256cb | 2092 | { |
b271272a | 2093 | /* Figure out what buffer we're going to bury. */ |
a2428fa2 | 2094 | if (NILP (buffer)) |
a5611885 | 2095 | { |
c58dab63 | 2096 | Lisp_Object tem; |
a2428fa2 | 2097 | XSETBUFFER (buffer, current_buffer); |
0a63b212 | 2098 | |
c58dab63 | 2099 | tem = Fwindow_buffer (selected_window); |
0a63b212 | 2100 | /* If we're burying the current buffer, unshow it. */ |
c58dab63 | 2101 | if (EQ (buffer, tem)) |
a78e0303 PJ |
2102 | { |
2103 | if (NILP (Fwindow_dedicated_p (selected_window))) | |
2104 | Fswitch_to_buffer (Fother_buffer (buffer, Qnil, Qnil), Qnil); | |
2105 | else if (NILP (XWINDOW (selected_window)->parent)) | |
2106 | Ficonify_frame (Fwindow_frame (selected_window)); | |
2107 | else | |
2108 | Fdelete_window (selected_window); | |
2109 | } | |
a5611885 | 2110 | } |
1ab256cb RM |
2111 | else |
2112 | { | |
2113 | Lisp_Object buf1; | |
177c0ea7 | 2114 | |
a2428fa2 | 2115 | buf1 = Fget_buffer (buffer); |
265a9e55 | 2116 | if (NILP (buf1)) |
a2428fa2 EN |
2117 | nsberror (buffer); |
2118 | buffer = buf1; | |
b271272a JB |
2119 | } |
2120 | ||
a1a8b28e GM |
2121 | /* Move buffer to the end of the buffer list. Do nothing if the |
2122 | buffer is killed. */ | |
2123 | if (!NILP (XBUFFER (buffer)->name)) | |
2124 | { | |
2125 | Lisp_Object aelt, link; | |
b271272a | 2126 | |
a1a8b28e GM |
2127 | aelt = Frassq (buffer, Vbuffer_alist); |
2128 | link = Fmemq (aelt, Vbuffer_alist); | |
2129 | Vbuffer_alist = Fdelq (aelt, Vbuffer_alist); | |
f3fbd155 | 2130 | XSETCDR (link, Qnil); |
a1a8b28e | 2131 | Vbuffer_alist = nconc2 (Vbuffer_alist, link); |
1ab256cb | 2132 | |
a18b8cb5 KL |
2133 | XFRAME (selected_frame)->buffer_list |
2134 | = Fdelq (buffer, XFRAME (selected_frame)->buffer_list); | |
2135 | XFRAME (selected_frame)->buried_buffer_list | |
2136 | = Fcons (buffer, Fdelq (buffer, XFRAME (selected_frame)->buried_buffer_list)); | |
a1a8b28e | 2137 | } |
dec989eb | 2138 | |
1ab256cb RM |
2139 | return Qnil; |
2140 | } | |
2141 | \f | |
c922bc55 | 2142 | DEFUN ("erase-buffer", Ferase_buffer, Serase_buffer, 0, 0, "*", |
7ee72033 | 2143 | doc: /* Delete the entire contents of the current buffer. |
018ba359 | 2144 | Any narrowing restriction in effect (see `narrow-to-region') is removed, |
7ee72033 MB |
2145 | so the buffer is truly empty after this. */) |
2146 | () | |
1ab256cb RM |
2147 | { |
2148 | Fwiden (); | |
c0d9a0c3 GM |
2149 | |
2150 | del_range (BEG, Z); | |
c280bc6a | 2151 | |
1ab256cb RM |
2152 | current_buffer->last_window_start = 1; |
2153 | /* Prevent warnings, or suspension of auto saving, that would happen | |
2154 | if future size is less than past size. Use of erase-buffer | |
2155 | implies that the future text is not really related to the past text. */ | |
8d7a4592 | 2156 | XSETFASTINT (current_buffer->save_length, 0); |
1ab256cb RM |
2157 | return Qnil; |
2158 | } | |
2159 | ||
01136e9b | 2160 | void |
1ab256cb RM |
2161 | validate_region (b, e) |
2162 | register Lisp_Object *b, *e; | |
2163 | { | |
b7826503 PJ |
2164 | CHECK_NUMBER_COERCE_MARKER (*b); |
2165 | CHECK_NUMBER_COERCE_MARKER (*e); | |
1ab256cb RM |
2166 | |
2167 | if (XINT (*b) > XINT (*e)) | |
2168 | { | |
03192067 KH |
2169 | Lisp_Object tem; |
2170 | tem = *b; *b = *e; *e = tem; | |
1ab256cb RM |
2171 | } |
2172 | ||
2173 | if (!(BEGV <= XINT (*b) && XINT (*b) <= XINT (*e) | |
2174 | && XINT (*e) <= ZV)) | |
2175 | args_out_of_range (*b, *e); | |
2176 | } | |
2177 | \f | |
b05525fa RS |
2178 | /* Advance BYTE_POS up to a character boundary |
2179 | and return the adjusted position. */ | |
2180 | ||
2181 | static int | |
2182 | advance_to_char_boundary (byte_pos) | |
2183 | int byte_pos; | |
2184 | { | |
f8449323 | 2185 | int c; |
b05525fa | 2186 | |
f8449323 RS |
2187 | if (byte_pos == BEG) |
2188 | /* Beginning of buffer is always a character boundary. */ | |
6d70a280 | 2189 | return BEG; |
f8449323 RS |
2190 | |
2191 | c = FETCH_BYTE (byte_pos); | |
2192 | if (! CHAR_HEAD_P (c)) | |
b05525fa | 2193 | { |
1be6387d | 2194 | /* We should advance BYTE_POS only when C is a constituent of a |
f8449323 | 2195 | multibyte sequence. */ |
a9bcded1 KH |
2196 | int orig_byte_pos = byte_pos; |
2197 | ||
2198 | do | |
2199 | { | |
2200 | byte_pos--; | |
2201 | c = FETCH_BYTE (byte_pos); | |
2202 | } | |
2203 | while (! CHAR_HEAD_P (c) && byte_pos > BEG); | |
f8449323 | 2204 | INC_POS (byte_pos); |
a9bcded1 KH |
2205 | if (byte_pos < orig_byte_pos) |
2206 | byte_pos = orig_byte_pos; | |
f8449323 RS |
2207 | /* If C is a constituent of a multibyte sequence, BYTE_POS was |
2208 | surely advance to the correct character boundary. If C is | |
2209 | not, BYTE_POS was unchanged. */ | |
b05525fa RS |
2210 | } |
2211 | ||
20773569 | 2212 | return byte_pos; |
b05525fa RS |
2213 | } |
2214 | ||
3ac81adb RS |
2215 | DEFUN ("set-buffer-multibyte", Fset_buffer_multibyte, Sset_buffer_multibyte, |
2216 | 1, 1, 0, | |
7ee72033 | 2217 | doc: /* Set the multibyte flag of the current buffer to FLAG. |
018ba359 PJ |
2218 | If FLAG is t, this makes the buffer a multibyte buffer. |
2219 | If FLAG is nil, this makes the buffer a single-byte buffer. | |
8f924df7 KH |
2220 | In these cases, the buffer contents remain unchanged as a sequence of |
2221 | bytes but the contents viewed as characters do change. | |
2222 | If FLAG is `to', this makes the buffer a multibyte buffer by changing | |
6b61353c KH |
2223 | all eight-bit bytes to eight-bit characters. |
2224 | If the multibyte flag was really changed, undo information of the | |
2225 | current buffer is cleared. */) | |
7ee72033 | 2226 | (flag) |
3ac81adb RS |
2227 | Lisp_Object flag; |
2228 | { | |
65745fad | 2229 | struct Lisp_Marker *tail, *markers; |
abc9d959 | 2230 | struct buffer *other; |
458c8af4 | 2231 | int begv, zv; |
8d1203ea | 2232 | int narrowed = (BEG != BEGV || Z != ZV); |
ed00559d | 2233 | int modified_p = !NILP (Fbuffer_modified_p (Qnil)); |
38babc07 KS |
2234 | Lisp_Object old_undo = current_buffer->undo_list; |
2235 | struct gcpro gcpro1; | |
3ac81adb | 2236 | |
6e553d5e RS |
2237 | if (current_buffer->base_buffer) |
2238 | error ("Cannot do `set-buffer-multibyte' on an indirect buffer"); | |
2239 | ||
70e77119 AS |
2240 | /* Do nothing if nothing actually changes. */ |
2241 | if (NILP (flag) == NILP (current_buffer->enable_multibyte_characters)) | |
2242 | return flag; | |
2243 | ||
38babc07 KS |
2244 | GCPRO1 (old_undo); |
2245 | ||
2246 | /* Don't record these buffer changes. We will put a special undo entry | |
2247 | instead. */ | |
2248 | current_buffer->undo_list = Qt; | |
b05525fa | 2249 | |
3ac81adb RS |
2250 | /* If the cached position is for this buffer, clear it out. */ |
2251 | clear_charpos_cache (current_buffer); | |
2252 | ||
458c8af4 KH |
2253 | if (NILP (flag)) |
2254 | begv = BEGV_BYTE, zv = ZV_BYTE; | |
2255 | else | |
2256 | begv = BEGV, zv = ZV; | |
2257 | ||
a9bcded1 KH |
2258 | if (narrowed) |
2259 | Fwiden (); | |
2260 | ||
3ac81adb RS |
2261 | if (NILP (flag)) |
2262 | { | |
a9bcded1 KH |
2263 | int pos, stop; |
2264 | unsigned char *p; | |
2265 | ||
3ac81adb RS |
2266 | /* Do this first, so it can use CHAR_TO_BYTE |
2267 | to calculate the old correspondences. */ | |
2268 | set_intervals_multibyte (0); | |
2269 | ||
2270 | current_buffer->enable_multibyte_characters = Qnil; | |
2271 | ||
2272 | Z = Z_BYTE; | |
2273 | BEGV = BEGV_BYTE; | |
2274 | ZV = ZV_BYTE; | |
2275 | GPT = GPT_BYTE; | |
2276 | TEMP_SET_PT_BOTH (PT_BYTE, PT_BYTE); | |
2277 | ||
60ebfdf3 | 2278 | |
65745fad SM |
2279 | for (tail = BUF_MARKERS (current_buffer); tail; tail = tail->next) |
2280 | tail->charpos = tail->bytepos; | |
a9bcded1 KH |
2281 | |
2282 | /* Convert multibyte form of 8-bit characters to unibyte. */ | |
2283 | pos = BEG; | |
2284 | stop = GPT; | |
2285 | p = BEG_ADDR; | |
2286 | while (1) | |
2287 | { | |
2288 | int c, bytes; | |
2289 | ||
2290 | if (pos == stop) | |
2291 | { | |
2292 | if (pos == Z) | |
2293 | break; | |
2294 | p = GAP_END_ADDR; | |
2295 | stop = Z; | |
2296 | } | |
8f348ed5 KH |
2297 | if (ASCII_BYTE_P (*p)) |
2298 | p++, pos++; | |
2299 | else if (CHAR_BYTE8_HEAD_P (*p)) | |
a9bcded1 | 2300 | { |
31285a8f | 2301 | c = STRING_CHAR_AND_LENGTH (p, stop - pos, bytes); |
a9bcded1 KH |
2302 | /* Delete all bytes for this 8-bit character but the |
2303 | last one, and change the last one to the charcter | |
2304 | code. */ | |
2305 | bytes--; | |
2306 | del_range_2 (pos, pos, pos + bytes, pos + bytes, 0); | |
2307 | p = GAP_END_ADDR; | |
2308 | *p++ = c; | |
2309 | pos++; | |
2310 | if (begv > pos) | |
2311 | begv -= bytes; | |
2312 | if (zv > pos) | |
2313 | zv -= bytes; | |
2314 | stop = Z; | |
2315 | } | |
8f924df7 | 2316 | else |
8f348ed5 KH |
2317 | { |
2318 | bytes = BYTES_BY_CHAR_HEAD (*p); | |
2319 | p += bytes, pos += bytes; | |
2320 | } | |
a9bcded1 KH |
2321 | } |
2322 | if (narrowed) | |
2323 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
3ac81adb RS |
2324 | } |
2325 | else | |
2326 | { | |
a9bcded1 KH |
2327 | int pt = PT; |
2328 | int pos, stop; | |
8f348ed5 | 2329 | unsigned char *p, *pend; |
a9bcded1 | 2330 | |
673c57d2 | 2331 | /* Be sure not to have a multibyte sequence striding over the GAP. |
8f348ed5 KH |
2332 | Ex: We change this: "...abc\302 _GAP_ \241def..." |
2333 | to: "...abc _GAP_ \302\241def..." */ | |
673c57d2 | 2334 | |
8f924df7 | 2335 | if (EQ (flag, Qt) |
a3a303df | 2336 | && GPT_BYTE > 1 && GPT_BYTE < Z_BYTE |
673c57d2 KH |
2337 | && ! CHAR_HEAD_P (*(GAP_END_ADDR))) |
2338 | { | |
2339 | unsigned char *p = GPT_ADDR - 1; | |
2340 | ||
2341 | while (! CHAR_HEAD_P (*p) && p > BEG_ADDR) p--; | |
2342 | if (BASE_LEADING_CODE_P (*p)) | |
2343 | { | |
2344 | int new_gpt = GPT_BYTE - (GPT_ADDR - p); | |
2345 | ||
2346 | move_gap_both (new_gpt, new_gpt); | |
2347 | } | |
2348 | } | |
2349 | ||
a9bcded1 KH |
2350 | /* Make the buffer contents valid as multibyte by converting |
2351 | 8-bit characters to multibyte form. */ | |
2352 | pos = BEG; | |
2353 | stop = GPT; | |
2354 | p = BEG_ADDR; | |
8f348ed5 | 2355 | pend = GPT_ADDR; |
a9bcded1 KH |
2356 | while (1) |
2357 | { | |
2358 | int bytes; | |
2359 | ||
2360 | if (pos == stop) | |
2361 | { | |
2362 | if (pos == Z) | |
2363 | break; | |
2364 | p = GAP_END_ADDR; | |
8f348ed5 | 2365 | pend = Z_ADDR; |
a9bcded1 KH |
2366 | stop = Z; |
2367 | } | |
177c0ea7 | 2368 | |
a3a303df KH |
2369 | if (ASCII_BYTE_P (*p)) |
2370 | p++, pos++; | |
8f924df7 | 2371 | else if (EQ (flag, Qt) && (bytes = MULTIBYTE_LENGTH (p, pend)) > 0) |
a9bcded1 KH |
2372 | p += bytes, pos += bytes; |
2373 | else | |
2374 | { | |
2375 | unsigned char tmp[MAX_MULTIBYTE_LENGTH]; | |
a3a303df | 2376 | int c; |
a9bcded1 | 2377 | |
8f924df7 | 2378 | c = BYTE8_TO_CHAR (*p); |
8c2fc311 | 2379 | bytes = CHAR_STRING (c, tmp); |
a9bcded1 KH |
2380 | *p = tmp[0]; |
2381 | TEMP_SET_PT_BOTH (pos + 1, pos + 1); | |
2382 | bytes--; | |
2383 | insert_1_both (tmp + 1, bytes, bytes, 1, 0, 0); | |
2384 | /* Now the gap is after the just inserted data. */ | |
2385 | pos = GPT; | |
2386 | p = GAP_END_ADDR; | |
2387 | if (pos <= begv) | |
2388 | begv += bytes; | |
2389 | if (pos <= zv) | |
2390 | zv += bytes; | |
2391 | if (pos <= pt) | |
2392 | pt += bytes; | |
31285a8f | 2393 | pend = Z_ADDR; |
a9bcded1 KH |
2394 | stop = Z; |
2395 | } | |
2396 | } | |
2397 | ||
2398 | if (pt != PT) | |
2399 | TEMP_SET_PT (pt); | |
2400 | ||
2401 | if (narrowed) | |
2402 | Fnarrow_to_region (make_number (begv), make_number (zv)); | |
2403 | ||
3ac81adb RS |
2404 | /* Do this first, so that chars_in_text asks the right question. |
2405 | set_intervals_multibyte needs it too. */ | |
2406 | current_buffer->enable_multibyte_characters = Qt; | |
2407 | ||
b05525fa | 2408 | GPT_BYTE = advance_to_char_boundary (GPT_BYTE); |
3ac81adb | 2409 | GPT = chars_in_text (BEG_ADDR, GPT_BYTE - BEG_BYTE) + BEG; |
b05525fa | 2410 | |
673c57d2 | 2411 | Z = chars_in_text (GAP_END_ADDR, Z_BYTE - GPT_BYTE) + GPT; |
b05525fa RS |
2412 | |
2413 | BEGV_BYTE = advance_to_char_boundary (BEGV_BYTE); | |
3ac81adb | 2414 | if (BEGV_BYTE > GPT_BYTE) |
673c57d2 | 2415 | BEGV = chars_in_text (GAP_END_ADDR, BEGV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2416 | else |
2417 | BEGV = chars_in_text (BEG_ADDR, BEGV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2418 | |
2419 | ZV_BYTE = advance_to_char_boundary (ZV_BYTE); | |
3ac81adb | 2420 | if (ZV_BYTE > GPT_BYTE) |
673c57d2 | 2421 | ZV = chars_in_text (GAP_END_ADDR, ZV_BYTE - GPT_BYTE) + GPT; |
3ac81adb RS |
2422 | else |
2423 | ZV = chars_in_text (BEG_ADDR, ZV_BYTE - BEG_BYTE) + BEG; | |
b05525fa RS |
2424 | |
2425 | { | |
2426 | int pt_byte = advance_to_char_boundary (PT_BYTE); | |
2427 | int pt; | |
2428 | ||
2429 | if (pt_byte > GPT_BYTE) | |
673c57d2 | 2430 | pt = chars_in_text (GAP_END_ADDR, pt_byte - GPT_BYTE) + GPT; |
b05525fa RS |
2431 | else |
2432 | pt = chars_in_text (BEG_ADDR, pt_byte - BEG_BYTE) + BEG; | |
2433 | TEMP_SET_PT_BOTH (pt, pt_byte); | |
2434 | } | |
3ac81adb RS |
2435 | |
2436 | tail = markers = BUF_MARKERS (current_buffer); | |
95fb069b RS |
2437 | |
2438 | /* This prevents BYTE_TO_CHAR (that is, buf_bytepos_to_charpos) from | |
2439 | getting confused by the markers that have not yet been updated. | |
2440 | It is also a signal that it should never create a marker. */ | |
65745fad | 2441 | BUF_MARKERS (current_buffer) = NULL; |
3ac81adb | 2442 | |
65745fad | 2443 | for (; tail; tail = tail->next) |
3ac81adb | 2444 | { |
65745fad SM |
2445 | tail->bytepos = advance_to_char_boundary (tail->bytepos); |
2446 | tail->charpos = BYTE_TO_CHAR (tail->bytepos); | |
3ac81adb | 2447 | } |
b69f9797 RS |
2448 | |
2449 | /* Make sure no markers were put on the chain | |
2450 | while the chain value was incorrect. */ | |
65745fad | 2451 | if (BUF_MARKERS (current_buffer)) |
b69f9797 RS |
2452 | abort (); |
2453 | ||
3ac81adb RS |
2454 | BUF_MARKERS (current_buffer) = markers; |
2455 | ||
2456 | /* Do this last, so it can calculate the new correspondences | |
2457 | between chars and bytes. */ | |
2458 | set_intervals_multibyte (1); | |
2459 | } | |
2460 | ||
38babc07 KS |
2461 | if (!EQ (old_undo, Qt)) |
2462 | { | |
2463 | /* Represent all the above changes by a special undo entry. */ | |
2464 | extern Lisp_Object Qapply; | |
8929fd87 KS |
2465 | current_buffer->undo_list = Fcons (list3 (Qapply, |
2466 | intern ("set-buffer-multibyte"), | |
2467 | NILP (flag) ? Qt : Qnil), | |
2468 | old_undo); | |
38babc07 KS |
2469 | } |
2470 | ||
2471 | UNGCPRO; | |
a9bcded1 | 2472 | |
724b203f GM |
2473 | /* Changing the multibyteness of a buffer means that all windows |
2474 | showing that buffer must be updated thoroughly. */ | |
2475 | current_buffer->prevent_redisplay_optimizations_p = 1; | |
2476 | ++windows_or_buffers_changed; | |
2477 | ||
abc9d959 RS |
2478 | /* Copy this buffer's new multibyte status |
2479 | into all of its indirect buffers. */ | |
2480 | for (other = all_buffers; other; other = other->next) | |
2481 | if (other->base_buffer == current_buffer && !NILP (other->name)) | |
724b203f GM |
2482 | { |
2483 | other->enable_multibyte_characters | |
2484 | = current_buffer->enable_multibyte_characters; | |
2485 | other->prevent_redisplay_optimizations_p = 1; | |
2486 | } | |
abc9d959 | 2487 | |
ed00559d KH |
2488 | /* Restore the modifiedness of the buffer. */ |
2489 | if (!modified_p && !NILP (Fbuffer_modified_p (Qnil))) | |
2490 | Fset_buffer_modified_p (Qnil); | |
2491 | ||
2a2b50a9 | 2492 | #ifdef subprocesses |
172f9454 KH |
2493 | /* Update coding systems of this buffer's process (if any). */ |
2494 | { | |
2495 | Lisp_Object process; | |
2496 | ||
2497 | process = Fget_buffer_process (Fcurrent_buffer ()); | |
2498 | if (PROCESSP (process)) | |
2499 | setup_process_coding_systems (process); | |
2500 | } | |
2a2b50a9 | 2501 | #endif /* subprocesses */ |
172f9454 | 2502 | |
3ac81adb RS |
2503 | return flag; |
2504 | } | |
2505 | \f | |
1ab256cb | 2506 | DEFUN ("kill-all-local-variables", Fkill_all_local_variables, Skill_all_local_variables, |
efc7e75f | 2507 | 0, 0, 0, |
7ee72033 | 2508 | doc: /* Switch to Fundamental mode by killing current buffer's local variables. |
018ba359 PJ |
2509 | Most local variable bindings are eliminated so that the default values |
2510 | become effective once more. Also, the syntax table is set from | |
2511 | `standard-syntax-table', the local keymap is set to nil, | |
2512 | and the abbrev table from `fundamental-mode-abbrev-table'. | |
2513 | This function also forces redisplay of the mode line. | |
2514 | ||
2515 | Every function to select a new major mode starts by | |
2516 | calling this function. | |
2517 | ||
2518 | As a special exception, local variables whose names have | |
2519 | a non-nil `permanent-local' property are not eliminated by this function. | |
2520 | ||
2521 | The first thing this function does is run | |
7ee72033 MB |
2522 | the normal hook `change-major-mode-hook'. */) |
2523 | () | |
1ab256cb | 2524 | { |
fd186f07 | 2525 | if (!NILP (Vrun_hooks)) |
43ed3b8d | 2526 | call1 (Vrun_hooks, Qchange_major_mode_hook); |
1ab256cb | 2527 | |
3709505e | 2528 | /* Make sure none of the bindings in local_var_alist |
2f3f993b | 2529 | remain swapped in, in their symbols. */ |
1ab256cb | 2530 | |
2f3f993b | 2531 | swap_out_buffer_local_variables (current_buffer); |
1ab256cb RM |
2532 | |
2533 | /* Actually eliminate all local bindings of this buffer. */ | |
2534 | ||
13de9290 | 2535 | reset_buffer_local_variables (current_buffer, 0); |
1ab256cb | 2536 | |
1ab256cb RM |
2537 | /* Force mode-line redisplay. Useful here because all major mode |
2538 | commands call this function. */ | |
2539 | update_mode_lines++; | |
2540 | ||
2541 | return Qnil; | |
2542 | } | |
2f3f993b RS |
2543 | |
2544 | /* Make sure no local variables remain set up with buffer B | |
2545 | for their current values. */ | |
2546 | ||
2547 | static void | |
2548 | swap_out_buffer_local_variables (b) | |
2549 | struct buffer *b; | |
2550 | { | |
2551 | Lisp_Object oalist, alist, sym, tem, buffer; | |
2552 | ||
2553 | XSETBUFFER (buffer, b); | |
2554 | oalist = b->local_var_alist; | |
2555 | ||
67ee9f6e | 2556 | for (alist = oalist; CONSP (alist); alist = XCDR (alist)) |
2f3f993b | 2557 | { |
7539e11f | 2558 | sym = XCAR (XCAR (alist)); |
2f3f993b RS |
2559 | |
2560 | /* Need not do anything if some other buffer's binding is now encached. */ | |
f5c1dd0d | 2561 | tem = XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym))->buffer; |
e7c10f83 | 2562 | if (EQ (tem, buffer)) |
2f3f993b | 2563 | { |
e7c10f83 SM |
2564 | /* Symbol is set up for this buffer's old local value: |
2565 | swap it out! */ | |
2566 | swap_in_global_binding (sym); | |
2f3f993b RS |
2567 | } |
2568 | } | |
2569 | } | |
1ab256cb | 2570 | \f |
2eec3b4e | 2571 | /* Find all the overlays in the current buffer that contain position POS. |
177c0ea7 | 2572 | Return the number found, and store them in a vector in *VEC_PTR. |
2eec3b4e | 2573 | Store in *LEN_PTR the size allocated for the vector. |
52f8ec73 | 2574 | Store in *NEXT_PTR the next position after POS where an overlay starts, |
624d2678 | 2575 | or ZV if there are no more overlays between POS and ZV. |
bbbe9545 | 2576 | Store in *PREV_PTR the previous position before POS where an overlay ends, |
413e06a4 | 2577 | or where an overlay starts which ends at or after POS; |
624d2678 | 2578 | or BEGV if there are no such overlays from BEGV to POS. |
239c932b | 2579 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. |
2eec3b4e RS |
2580 | |
2581 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
61d54cd5 RS |
2582 | when this function is called. |
2583 | ||
2584 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2585 | If EXTEND is zero, we never extend the vector, | |
2586 | and we store only as many overlays as will fit. | |
ac869cf7 MB |
2587 | But we still return the total number of overlays. |
2588 | ||
2589 | If CHANGE_REQ is true, then any position written into *PREV_PTR or | |
2590 | *NEXT_PTR is guaranteed to be not equal to POS, unless it is the | |
2591 | default (BEGV or ZV). */ | |
2eec3b4e RS |
2592 | |
2593 | int | |
ac869cf7 | 2594 | overlays_at (pos, extend, vec_ptr, len_ptr, next_ptr, prev_ptr, change_req) |
c2d5b10f | 2595 | EMACS_INT pos; |
61d54cd5 | 2596 | int extend; |
2eec3b4e RS |
2597 | Lisp_Object **vec_ptr; |
2598 | int *len_ptr; | |
2599 | int *next_ptr; | |
239c932b | 2600 | int *prev_ptr; |
ac869cf7 | 2601 | int change_req; |
1ab256cb | 2602 | { |
2410d73a SM |
2603 | Lisp_Object overlay, start, end; |
2604 | struct Lisp_Overlay *tail; | |
2eec3b4e RS |
2605 | int idx = 0; |
2606 | int len = *len_ptr; | |
2607 | Lisp_Object *vec = *vec_ptr; | |
2608 | int next = ZV; | |
239c932b | 2609 | int prev = BEGV; |
61d54cd5 RS |
2610 | int inhibit_storing = 0; |
2611 | ||
2410d73a | 2612 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
2eec3b4e | 2613 | { |
239c932b | 2614 | int startpos, endpos; |
52f8ec73 | 2615 | |
2410d73a | 2616 | XSETMISC (overlay, tail); |
1ab256cb | 2617 | |
2eec3b4e RS |
2618 | start = OVERLAY_START (overlay); |
2619 | end = OVERLAY_END (overlay); | |
239c932b RS |
2620 | endpos = OVERLAY_POSITION (end); |
2621 | if (endpos < pos) | |
2622 | { | |
2623 | if (prev < endpos) | |
2624 | prev = endpos; | |
2625 | break; | |
2626 | } | |
413e06a4 RS |
2627 | startpos = OVERLAY_POSITION (start); |
2628 | /* This one ends at or after POS | |
daa1c109 | 2629 | so its start counts for PREV_PTR if it's before POS. */ |
413e06a4 RS |
2630 | if (prev < startpos && startpos < pos) |
2631 | prev = startpos; | |
239c932b RS |
2632 | if (endpos == pos) |
2633 | continue; | |
2eec3b4e RS |
2634 | if (startpos <= pos) |
2635 | { | |
2636 | if (idx == len) | |
2637 | { | |
61d54cd5 RS |
2638 | /* The supplied vector is full. |
2639 | Either make it bigger, or don't store any more in it. */ | |
2640 | if (extend) | |
2641 | { | |
0552666b GM |
2642 | /* Make it work with an initial len == 0. */ |
2643 | len *= 2; | |
2644 | if (len == 0) | |
2645 | len = 4; | |
2646 | *len_ptr = len; | |
61d54cd5 RS |
2647 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2648 | *vec_ptr = vec; | |
2649 | } | |
2650 | else | |
2651 | inhibit_storing = 1; | |
2eec3b4e | 2652 | } |
61d54cd5 RS |
2653 | |
2654 | if (!inhibit_storing) | |
2655 | vec[idx] = overlay; | |
2656 | /* Keep counting overlays even if we can't return them all. */ | |
2657 | idx++; | |
2eec3b4e RS |
2658 | } |
2659 | else if (startpos < next) | |
2660 | next = startpos; | |
2661 | } | |
2662 | ||
2410d73a | 2663 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
1ab256cb | 2664 | { |
239c932b | 2665 | int startpos, endpos; |
52f8ec73 | 2666 | |
2410d73a | 2667 | XSETMISC (overlay, tail); |
2eec3b4e RS |
2668 | |
2669 | start = OVERLAY_START (overlay); | |
2670 | end = OVERLAY_END (overlay); | |
2671 | startpos = OVERLAY_POSITION (start); | |
52f8ec73 | 2672 | if (pos < startpos) |
2eec3b4e RS |
2673 | { |
2674 | if (startpos < next) | |
2675 | next = startpos; | |
2676 | break; | |
2677 | } | |
239c932b RS |
2678 | endpos = OVERLAY_POSITION (end); |
2679 | if (pos < endpos) | |
2eec3b4e RS |
2680 | { |
2681 | if (idx == len) | |
2682 | { | |
61d54cd5 RS |
2683 | if (extend) |
2684 | { | |
4b0e44fc RS |
2685 | /* Make it work with an initial len == 0. */ |
2686 | len *= 2; | |
0552666b | 2687 | if (len == 0) |
4b0e44fc RS |
2688 | len = 4; |
2689 | *len_ptr = len; | |
61d54cd5 RS |
2690 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2691 | *vec_ptr = vec; | |
2692 | } | |
2693 | else | |
2694 | inhibit_storing = 1; | |
2eec3b4e | 2695 | } |
61d54cd5 RS |
2696 | |
2697 | if (!inhibit_storing) | |
2698 | vec[idx] = overlay; | |
2699 | idx++; | |
413e06a4 RS |
2700 | |
2701 | if (startpos < pos && startpos > prev) | |
2702 | prev = startpos; | |
2eec3b4e | 2703 | } |
239c932b RS |
2704 | else if (endpos < pos && endpos > prev) |
2705 | prev = endpos; | |
1d5f4c1d MB |
2706 | else if (endpos == pos && startpos > prev |
2707 | && (!change_req || startpos < pos)) | |
413e06a4 | 2708 | prev = startpos; |
1ab256cb RM |
2709 | } |
2710 | ||
239c932b RS |
2711 | if (next_ptr) |
2712 | *next_ptr = next; | |
2713 | if (prev_ptr) | |
2714 | *prev_ptr = prev; | |
2eec3b4e RS |
2715 | return idx; |
2716 | } | |
74514898 RS |
2717 | \f |
2718 | /* Find all the overlays in the current buffer that overlap the range BEG-END | |
2a3eeee7 RS |
2719 | or are empty at BEG. |
2720 | ||
177c0ea7 | 2721 | Return the number found, and store them in a vector in *VEC_PTR. |
74514898 RS |
2722 | Store in *LEN_PTR the size allocated for the vector. |
2723 | Store in *NEXT_PTR the next position after POS where an overlay starts, | |
2724 | or ZV if there are no more overlays. | |
2725 | Store in *PREV_PTR the previous position before POS where an overlay ends, | |
2726 | or BEGV if there are no previous overlays. | |
2727 | NEXT_PTR and/or PREV_PTR may be 0, meaning don't store that info. | |
2728 | ||
2729 | *VEC_PTR and *LEN_PTR should contain a valid vector and size | |
2730 | when this function is called. | |
2731 | ||
2732 | If EXTEND is non-zero, we make the vector bigger if necessary. | |
2733 | If EXTEND is zero, we never extend the vector, | |
2734 | and we store only as many overlays as will fit. | |
2735 | But we still return the total number of overlays. */ | |
2736 | ||
a9b9a780 | 2737 | static int |
74514898 RS |
2738 | overlays_in (beg, end, extend, vec_ptr, len_ptr, next_ptr, prev_ptr) |
2739 | int beg, end; | |
2740 | int extend; | |
2741 | Lisp_Object **vec_ptr; | |
2742 | int *len_ptr; | |
2743 | int *next_ptr; | |
2744 | int *prev_ptr; | |
2745 | { | |
2410d73a SM |
2746 | Lisp_Object overlay, ostart, oend; |
2747 | struct Lisp_Overlay *tail; | |
74514898 RS |
2748 | int idx = 0; |
2749 | int len = *len_ptr; | |
2750 | Lisp_Object *vec = *vec_ptr; | |
2751 | int next = ZV; | |
2752 | int prev = BEGV; | |
2753 | int inhibit_storing = 0; | |
2754 | ||
2410d73a | 2755 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
74514898 RS |
2756 | { |
2757 | int startpos, endpos; | |
2758 | ||
2410d73a | 2759 | XSETMISC (overlay, tail); |
74514898 RS |
2760 | |
2761 | ostart = OVERLAY_START (overlay); | |
2762 | oend = OVERLAY_END (overlay); | |
2763 | endpos = OVERLAY_POSITION (oend); | |
2764 | if (endpos < beg) | |
2765 | { | |
2766 | if (prev < endpos) | |
2767 | prev = endpos; | |
2768 | break; | |
2769 | } | |
2770 | startpos = OVERLAY_POSITION (ostart); | |
2771 | /* Count an interval if it either overlaps the range | |
2a3eeee7 | 2772 | or is empty at the start of the range. */ |
74514898 | 2773 | if ((beg < endpos && startpos < end) |
2a3eeee7 | 2774 | || (startpos == endpos && beg == endpos)) |
74514898 RS |
2775 | { |
2776 | if (idx == len) | |
2777 | { | |
2778 | /* The supplied vector is full. | |
2779 | Either make it bigger, or don't store any more in it. */ | |
2780 | if (extend) | |
2781 | { | |
4b0e44fc RS |
2782 | /* Make it work with an initial len == 0. */ |
2783 | len *= 2; | |
2784 | if (len == 0) | |
2785 | len = 4; | |
2786 | *len_ptr = len; | |
74514898 RS |
2787 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2788 | *vec_ptr = vec; | |
2789 | } | |
2790 | else | |
2791 | inhibit_storing = 1; | |
2792 | } | |
2793 | ||
2794 | if (!inhibit_storing) | |
2795 | vec[idx] = overlay; | |
2796 | /* Keep counting overlays even if we can't return them all. */ | |
2797 | idx++; | |
2798 | } | |
2799 | else if (startpos < next) | |
2800 | next = startpos; | |
2801 | } | |
2802 | ||
2410d73a | 2803 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
74514898 RS |
2804 | { |
2805 | int startpos, endpos; | |
2806 | ||
2410d73a | 2807 | XSETMISC (overlay, tail); |
74514898 RS |
2808 | |
2809 | ostart = OVERLAY_START (overlay); | |
2810 | oend = OVERLAY_END (overlay); | |
2811 | startpos = OVERLAY_POSITION (ostart); | |
2812 | if (end < startpos) | |
2813 | { | |
2814 | if (startpos < next) | |
2815 | next = startpos; | |
2816 | break; | |
2817 | } | |
2818 | endpos = OVERLAY_POSITION (oend); | |
2a3eeee7 RS |
2819 | /* Count an interval if it either overlaps the range |
2820 | or is empty at the start of the range. */ | |
74514898 | 2821 | if ((beg < endpos && startpos < end) |
2a3eeee7 | 2822 | || (startpos == endpos && beg == endpos)) |
74514898 RS |
2823 | { |
2824 | if (idx == len) | |
2825 | { | |
2826 | if (extend) | |
2827 | { | |
4b0e44fc RS |
2828 | /* Make it work with an initial len == 0. */ |
2829 | len *= 2; | |
2830 | if (len == 0) | |
2831 | len = 4; | |
2832 | *len_ptr = len; | |
74514898 RS |
2833 | vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object)); |
2834 | *vec_ptr = vec; | |
2835 | } | |
2836 | else | |
2837 | inhibit_storing = 1; | |
2838 | } | |
2839 | ||
2840 | if (!inhibit_storing) | |
2841 | vec[idx] = overlay; | |
2842 | idx++; | |
2843 | } | |
2844 | else if (endpos < beg && endpos > prev) | |
2845 | prev = endpos; | |
2846 | } | |
fc04fa47 | 2847 | |
74514898 RS |
2848 | if (next_ptr) |
2849 | *next_ptr = next; | |
2850 | if (prev_ptr) | |
2851 | *prev_ptr = prev; | |
2852 | return idx; | |
2853 | } | |
09a22085 GM |
2854 | |
2855 | ||
2856 | /* Return non-zero if there exists an overlay with a non-nil | |
2857 | `mouse-face' property overlapping OVERLAY. */ | |
2858 | ||
2859 | int | |
2860 | mouse_face_overlay_overlaps (overlay) | |
2861 | Lisp_Object overlay; | |
2862 | { | |
2863 | int start = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2864 | int end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
bfd8410f | 2865 | int n, i, size; |
09a22085 | 2866 | Lisp_Object *v, tem; |
177c0ea7 | 2867 | |
bfd8410f GM |
2868 | size = 10; |
2869 | v = (Lisp_Object *) alloca (size * sizeof *v); | |
2870 | n = overlays_in (start, end, 0, &v, &size, NULL, NULL); | |
2871 | if (n > size) | |
09a22085 | 2872 | { |
09a22085 GM |
2873 | v = (Lisp_Object *) alloca (n * sizeof *v); |
2874 | overlays_in (start, end, 0, &v, &n, NULL, NULL); | |
2875 | } | |
2876 | ||
2877 | for (i = 0; i < n; ++i) | |
2878 | if (!EQ (v[i], overlay) | |
2879 | && (tem = Foverlay_get (overlay, Qmouse_face), | |
2880 | !NILP (tem))) | |
2881 | break; | |
2882 | ||
2883 | return i < n; | |
2884 | } | |
2885 | ||
2886 | ||
74514898 | 2887 | \f |
fc04fa47 KH |
2888 | /* Fast function to just test if we're at an overlay boundary. */ |
2889 | int | |
2890 | overlay_touches_p (pos) | |
2891 | int pos; | |
2892 | { | |
2410d73a SM |
2893 | Lisp_Object overlay; |
2894 | struct Lisp_Overlay *tail; | |
fc04fa47 | 2895 | |
2410d73a | 2896 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
fc04fa47 KH |
2897 | { |
2898 | int endpos; | |
2899 | ||
2410d73a | 2900 | XSETMISC (overlay ,tail); |
8e50cc2d | 2901 | if (!OVERLAYP (overlay)) |
fc04fa47 KH |
2902 | abort (); |
2903 | ||
2904 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2905 | if (endpos < pos) | |
2906 | break; | |
2907 | if (endpos == pos || OVERLAY_POSITION (OVERLAY_START (overlay)) == pos) | |
2908 | return 1; | |
2909 | } | |
2910 | ||
2410d73a | 2911 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
fc04fa47 KH |
2912 | { |
2913 | int startpos; | |
2914 | ||
2410d73a | 2915 | XSETMISC (overlay, tail); |
8e50cc2d | 2916 | if (!OVERLAYP (overlay)) |
fc04fa47 KH |
2917 | abort (); |
2918 | ||
2919 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2920 | if (pos < startpos) | |
2921 | break; | |
2922 | if (startpos == pos || OVERLAY_POSITION (OVERLAY_END (overlay)) == pos) | |
2923 | return 1; | |
2924 | } | |
2925 | return 0; | |
2926 | } | |
2eec3b4e | 2927 | \f |
5985d248 KH |
2928 | struct sortvec |
2929 | { | |
2930 | Lisp_Object overlay; | |
2931 | int beg, end; | |
2932 | int priority; | |
2933 | }; | |
2934 | ||
2935 | static int | |
dfcf069d AS |
2936 | compare_overlays (v1, v2) |
2937 | const void *v1, *v2; | |
5985d248 | 2938 | { |
dfcf069d AS |
2939 | const struct sortvec *s1 = (const struct sortvec *) v1; |
2940 | const struct sortvec *s2 = (const struct sortvec *) v2; | |
5985d248 KH |
2941 | if (s1->priority != s2->priority) |
2942 | return s1->priority - s2->priority; | |
2943 | if (s1->beg != s2->beg) | |
2944 | return s1->beg - s2->beg; | |
2945 | if (s1->end != s2->end) | |
2946 | return s2->end - s1->end; | |
2947 | return 0; | |
2948 | } | |
2949 | ||
2950 | /* Sort an array of overlays by priority. The array is modified in place. | |
2951 | The return value is the new size; this may be smaller than the original | |
2952 | size if some of the overlays were invalid or were window-specific. */ | |
2953 | int | |
2954 | sort_overlays (overlay_vec, noverlays, w) | |
2955 | Lisp_Object *overlay_vec; | |
2956 | int noverlays; | |
2957 | struct window *w; | |
2958 | { | |
2959 | int i, j; | |
2960 | struct sortvec *sortvec; | |
2961 | sortvec = (struct sortvec *) alloca (noverlays * sizeof (struct sortvec)); | |
2962 | ||
2963 | /* Put the valid and relevant overlays into sortvec. */ | |
2964 | ||
2965 | for (i = 0, j = 0; i < noverlays; i++) | |
2966 | { | |
0fa767e7 | 2967 | Lisp_Object tem; |
c99fc30f | 2968 | Lisp_Object overlay; |
5985d248 | 2969 | |
c99fc30f | 2970 | overlay = overlay_vec[i]; |
5985d248 KH |
2971 | if (OVERLAY_VALID (overlay) |
2972 | && OVERLAY_POSITION (OVERLAY_START (overlay)) > 0 | |
2973 | && OVERLAY_POSITION (OVERLAY_END (overlay)) > 0) | |
2974 | { | |
0fa767e7 KH |
2975 | /* If we're interested in a specific window, then ignore |
2976 | overlays that are limited to some other window. */ | |
2977 | if (w) | |
5985d248 | 2978 | { |
0fa767e7 KH |
2979 | Lisp_Object window; |
2980 | ||
2981 | window = Foverlay_get (overlay, Qwindow); | |
a7a60ce9 | 2982 | if (WINDOWP (window) && XWINDOW (window) != w) |
0fa767e7 | 2983 | continue; |
5985d248 | 2984 | } |
0fa767e7 KH |
2985 | |
2986 | /* This overlay is good and counts: put it into sortvec. */ | |
2987 | sortvec[j].overlay = overlay; | |
2988 | sortvec[j].beg = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
2989 | sortvec[j].end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
2990 | tem = Foverlay_get (overlay, Qpriority); | |
2991 | if (INTEGERP (tem)) | |
2992 | sortvec[j].priority = XINT (tem); | |
2993 | else | |
2994 | sortvec[j].priority = 0; | |
2995 | j++; | |
5985d248 KH |
2996 | } |
2997 | } | |
2998 | noverlays = j; | |
2999 | ||
3000 | /* Sort the overlays into the proper order: increasing priority. */ | |
3001 | ||
3002 | if (noverlays > 1) | |
3003 | qsort (sortvec, noverlays, sizeof (struct sortvec), compare_overlays); | |
3004 | ||
3005 | for (i = 0; i < noverlays; i++) | |
3006 | overlay_vec[i] = sortvec[i].overlay; | |
3007 | return (noverlays); | |
3008 | } | |
3009 | \f | |
bbbe9545 KH |
3010 | struct sortstr |
3011 | { | |
cb26008f | 3012 | Lisp_Object string, string2; |
bbbe9545 KH |
3013 | int size; |
3014 | int priority; | |
3015 | }; | |
3016 | ||
e8185fa8 KH |
3017 | struct sortstrlist |
3018 | { | |
3019 | struct sortstr *buf; /* An array that expands as needed; never freed. */ | |
3020 | int size; /* Allocated length of that array. */ | |
3021 | int used; /* How much of the array is currently in use. */ | |
3022 | int bytes; /* Total length of the strings in buf. */ | |
3023 | }; | |
3024 | ||
3025 | /* Buffers for storing information about the overlays touching a given | |
3026 | position. These could be automatic variables in overlay_strings, but | |
3027 | it's more efficient to hold onto the memory instead of repeatedly | |
3028 | allocating and freeing it. */ | |
3029 | static struct sortstrlist overlay_heads, overlay_tails; | |
9492daf2 | 3030 | static unsigned char *overlay_str_buf; |
e8185fa8 KH |
3031 | |
3032 | /* Allocated length of overlay_str_buf. */ | |
3033 | static int overlay_str_len; | |
3034 | ||
bbbe9545 KH |
3035 | /* A comparison function suitable for passing to qsort. */ |
3036 | static int | |
3037 | cmp_for_strings (as1, as2) | |
3038 | char *as1, *as2; | |
3039 | { | |
3040 | struct sortstr *s1 = (struct sortstr *)as1; | |
3041 | struct sortstr *s2 = (struct sortstr *)as2; | |
3042 | if (s1->size != s2->size) | |
3043 | return s2->size - s1->size; | |
3044 | if (s1->priority != s2->priority) | |
3045 | return s1->priority - s2->priority; | |
3046 | return 0; | |
3047 | } | |
3048 | ||
e8185fa8 | 3049 | static void |
cb26008f | 3050 | record_overlay_string (ssl, str, str2, pri, size) |
e8185fa8 | 3051 | struct sortstrlist *ssl; |
cb26008f | 3052 | Lisp_Object str, str2, pri; |
e8185fa8 KH |
3053 | int size; |
3054 | { | |
43d27a72 RS |
3055 | int nbytes; |
3056 | ||
e8185fa8 KH |
3057 | if (ssl->used == ssl->size) |
3058 | { | |
3059 | if (ssl->buf) | |
3060 | ssl->size *= 2; | |
3061 | else | |
3062 | ssl->size = 5; | |
3063 | ssl->buf = ((struct sortstr *) | |
3064 | xrealloc (ssl->buf, ssl->size * sizeof (struct sortstr))); | |
3065 | } | |
3066 | ssl->buf[ssl->used].string = str; | |
cb26008f | 3067 | ssl->buf[ssl->used].string2 = str2; |
e8185fa8 KH |
3068 | ssl->buf[ssl->used].size = size; |
3069 | ssl->buf[ssl->used].priority = (INTEGERP (pri) ? XINT (pri) : 0); | |
3070 | ssl->used++; | |
43d27a72 RS |
3071 | |
3072 | if (NILP (current_buffer->enable_multibyte_characters)) | |
d5db4077 | 3073 | nbytes = SCHARS (str); |
43d27a72 | 3074 | else if (! STRING_MULTIBYTE (str)) |
d5db4077 KR |
3075 | nbytes = count_size_as_multibyte (SDATA (str), |
3076 | SBYTES (str)); | |
43d27a72 | 3077 | else |
d5db4077 | 3078 | nbytes = SBYTES (str); |
43d27a72 RS |
3079 | |
3080 | ssl->bytes += nbytes; | |
3081 | ||
cb26008f | 3082 | if (STRINGP (str2)) |
43d27a72 RS |
3083 | { |
3084 | if (NILP (current_buffer->enable_multibyte_characters)) | |
d5db4077 | 3085 | nbytes = SCHARS (str2); |
43d27a72 | 3086 | else if (! STRING_MULTIBYTE (str2)) |
d5db4077 KR |
3087 | nbytes = count_size_as_multibyte (SDATA (str2), |
3088 | SBYTES (str2)); | |
43d27a72 | 3089 | else |
d5db4077 | 3090 | nbytes = SBYTES (str2); |
43d27a72 RS |
3091 | |
3092 | ssl->bytes += nbytes; | |
3093 | } | |
e8185fa8 | 3094 | } |
bbbe9545 KH |
3095 | |
3096 | /* Return the concatenation of the strings associated with overlays that | |
3097 | begin or end at POS, ignoring overlays that are specific to a window | |
3098 | other than W. The strings are concatenated in the appropriate order: | |
3099 | shorter overlays nest inside longer ones, and higher priority inside | |
cb26008f KH |
3100 | lower. Normally all of the after-strings come first, but zero-sized |
3101 | overlays have their after-strings ride along with the before-strings | |
3102 | because it would look strange to print them inside-out. | |
3103 | ||
3104 | Returns the string length, and stores the contents indirectly through | |
3105 | PSTR, if that variable is non-null. The string may be overwritten by | |
3106 | subsequent calls. */ | |
6b5d3b89 | 3107 | |
bbbe9545 KH |
3108 | int |
3109 | overlay_strings (pos, w, pstr) | |
c2d5b10f | 3110 | EMACS_INT pos; |
bbbe9545 | 3111 | struct window *w; |
6b5d3b89 | 3112 | unsigned char **pstr; |
bbbe9545 | 3113 | { |
2410d73a SM |
3114 | Lisp_Object overlay, window, str; |
3115 | struct Lisp_Overlay *ov; | |
bbbe9545 | 3116 | int startpos, endpos; |
43d27a72 | 3117 | int multibyte = ! NILP (current_buffer->enable_multibyte_characters); |
bbbe9545 | 3118 | |
e8185fa8 KH |
3119 | overlay_heads.used = overlay_heads.bytes = 0; |
3120 | overlay_tails.used = overlay_tails.bytes = 0; | |
2410d73a | 3121 | for (ov = current_buffer->overlays_before; ov; ov = ov->next) |
bbbe9545 | 3122 | { |
2410d73a | 3123 | XSETMISC (overlay, ov); |
c2d5b10f | 3124 | eassert (OVERLAYP (overlay)); |
bbbe9545 KH |
3125 | |
3126 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3127 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3128 | if (endpos < pos) | |
3129 | break; | |
3130 | if (endpos != pos && startpos != pos) | |
3131 | continue; | |
3132 | window = Foverlay_get (overlay, Qwindow); | |
3133 | if (WINDOWP (window) && XWINDOW (window) != w) | |
3134 | continue; | |
e8185fa8 KH |
3135 | if (startpos == pos |
3136 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3137 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3138 | (startpos == endpos |
3139 | ? Foverlay_get (overlay, Qafter_string) | |
3140 | : Qnil), | |
3141 | Foverlay_get (overlay, Qpriority), | |
3142 | endpos - startpos); | |
3143 | else if (endpos == pos | |
3144 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3145 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3146 | Foverlay_get (overlay, Qpriority), |
3147 | endpos - startpos); | |
bbbe9545 | 3148 | } |
2410d73a | 3149 | for (ov = current_buffer->overlays_after; ov; ov = ov->next) |
bbbe9545 | 3150 | { |
2410d73a SM |
3151 | XSETMISC (overlay, ov); |
3152 | eassert (OVERLAYP (overlay)); | |
bbbe9545 KH |
3153 | |
3154 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); | |
3155 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
3156 | if (startpos > pos) | |
3157 | break; | |
e8185fa8 KH |
3158 | if (endpos != pos && startpos != pos) |
3159 | continue; | |
3160 | window = Foverlay_get (overlay, Qwindow); | |
3161 | if (WINDOWP (window) && XWINDOW (window) != w) | |
3162 | continue; | |
e8185fa8 KH |
3163 | if (startpos == pos |
3164 | && (str = Foverlay_get (overlay, Qbefore_string), STRINGP (str))) | |
3165 | record_overlay_string (&overlay_heads, str, | |
cb26008f KH |
3166 | (startpos == endpos |
3167 | ? Foverlay_get (overlay, Qafter_string) | |
3168 | : Qnil), | |
3169 | Foverlay_get (overlay, Qpriority), | |
3170 | endpos - startpos); | |
3171 | else if (endpos == pos | |
3172 | && (str = Foverlay_get (overlay, Qafter_string), STRINGP (str))) | |
3173 | record_overlay_string (&overlay_tails, str, Qnil, | |
e8185fa8 KH |
3174 | Foverlay_get (overlay, Qpriority), |
3175 | endpos - startpos); | |
bbbe9545 | 3176 | } |
e8185fa8 KH |
3177 | if (overlay_tails.used > 1) |
3178 | qsort (overlay_tails.buf, overlay_tails.used, sizeof (struct sortstr), | |
3179 | cmp_for_strings); | |
3180 | if (overlay_heads.used > 1) | |
3181 | qsort (overlay_heads.buf, overlay_heads.used, sizeof (struct sortstr), | |
3182 | cmp_for_strings); | |
3183 | if (overlay_heads.bytes || overlay_tails.bytes) | |
bbbe9545 | 3184 | { |
e8185fa8 | 3185 | Lisp_Object tem; |
bbbe9545 | 3186 | int i; |
9f4d7cde | 3187 | unsigned char *p; |
e8185fa8 | 3188 | int total = overlay_heads.bytes + overlay_tails.bytes; |
bbbe9545 KH |
3189 | |
3190 | if (total > overlay_str_len) | |
9f4d7cde RS |
3191 | { |
3192 | overlay_str_len = total; | |
3193 | overlay_str_buf = (unsigned char *)xrealloc (overlay_str_buf, | |
3194 | total); | |
3195 | } | |
bbbe9545 | 3196 | p = overlay_str_buf; |
e8185fa8 | 3197 | for (i = overlay_tails.used; --i >= 0;) |
bbbe9545 | 3198 | { |
43d27a72 | 3199 | int nbytes; |
e8185fa8 | 3200 | tem = overlay_tails.buf[i].string; |
d5db4077 KR |
3201 | nbytes = copy_text (SDATA (tem), p, |
3202 | SBYTES (tem), | |
43d27a72 RS |
3203 | STRING_MULTIBYTE (tem), multibyte); |
3204 | p += nbytes; | |
bbbe9545 | 3205 | } |
e8185fa8 | 3206 | for (i = 0; i < overlay_heads.used; ++i) |
bbbe9545 | 3207 | { |
43d27a72 | 3208 | int nbytes; |
e8185fa8 | 3209 | tem = overlay_heads.buf[i].string; |
d5db4077 KR |
3210 | nbytes = copy_text (SDATA (tem), p, |
3211 | SBYTES (tem), | |
43d27a72 RS |
3212 | STRING_MULTIBYTE (tem), multibyte); |
3213 | p += nbytes; | |
cb26008f KH |
3214 | tem = overlay_heads.buf[i].string2; |
3215 | if (STRINGP (tem)) | |
3216 | { | |
d5db4077 KR |
3217 | nbytes = copy_text (SDATA (tem), p, |
3218 | SBYTES (tem), | |
43d27a72 RS |
3219 | STRING_MULTIBYTE (tem), multibyte); |
3220 | p += nbytes; | |
cb26008f | 3221 | } |
bbbe9545 | 3222 | } |
cb26008f KH |
3223 | if (p != overlay_str_buf + total) |
3224 | abort (); | |
bbbe9545 KH |
3225 | if (pstr) |
3226 | *pstr = overlay_str_buf; | |
e8185fa8 | 3227 | return total; |
bbbe9545 | 3228 | } |
e8185fa8 | 3229 | return 0; |
bbbe9545 KH |
3230 | } |
3231 | \f | |
5c4f68f1 | 3232 | /* Shift overlays in BUF's overlay lists, to center the lists at POS. */ |
1ab256cb | 3233 | |
2eec3b4e | 3234 | void |
5c4f68f1 JB |
3235 | recenter_overlay_lists (buf, pos) |
3236 | struct buffer *buf; | |
c2d5b10f | 3237 | EMACS_INT pos; |
2eec3b4e | 3238 | { |
2410d73a SM |
3239 | Lisp_Object overlay, beg, end; |
3240 | struct Lisp_Overlay *prev, *tail, *next; | |
2eec3b4e RS |
3241 | |
3242 | /* See if anything in overlays_before should move to overlays_after. */ | |
3243 | ||
3244 | /* We don't strictly need prev in this loop; it should always be nil. | |
3245 | But we use it for symmetry and in case that should cease to be true | |
3246 | with some future change. */ | |
2410d73a SM |
3247 | prev = NULL; |
3248 | for (tail = buf->overlays_before; tail; prev = tail, tail = next) | |
1ab256cb | 3249 | { |
2410d73a SM |
3250 | next = tail->next; |
3251 | XSETMISC (overlay, tail); | |
2eec3b4e RS |
3252 | |
3253 | /* If the overlay is not valid, get rid of it. */ | |
3254 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3255 | #if 1 |
3256 | abort (); | |
3257 | #else | |
2eec3b4e RS |
3258 | { |
3259 | /* Splice the cons cell TAIL out of overlays_before. */ | |
3260 | if (!NILP (prev)) | |
7539e11f | 3261 | XCDR (prev) = next; |
2eec3b4e | 3262 | else |
5c4f68f1 | 3263 | buf->overlays_before = next; |
2eec3b4e RS |
3264 | tail = prev; |
3265 | continue; | |
3266 | } | |
52f8ec73 | 3267 | #endif |
1ab256cb | 3268 | |
2eec3b4e RS |
3269 | beg = OVERLAY_START (overlay); |
3270 | end = OVERLAY_END (overlay); | |
1ab256cb | 3271 | |
2eec3b4e | 3272 | if (OVERLAY_POSITION (end) > pos) |
1ab256cb | 3273 | { |
2eec3b4e RS |
3274 | /* OVERLAY needs to be moved. */ |
3275 | int where = OVERLAY_POSITION (beg); | |
2410d73a | 3276 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3277 | |
3278 | /* Splice the cons cell TAIL out of overlays_before. */ | |
2410d73a SM |
3279 | if (prev) |
3280 | prev->next = next; | |
2eec3b4e | 3281 | else |
5c4f68f1 | 3282 | buf->overlays_before = next; |
2eec3b4e RS |
3283 | |
3284 | /* Search thru overlays_after for where to put it. */ | |
2410d73a SM |
3285 | other_prev = NULL; |
3286 | for (other = buf->overlays_after; other; | |
3287 | other_prev = other, other = other->next) | |
1ab256cb | 3288 | { |
6af718a4 | 3289 | Lisp_Object otherbeg, otheroverlay; |
2eec3b4e | 3290 | |
2410d73a SM |
3291 | XSETMISC (otheroverlay, other); |
3292 | eassert (OVERLAY_VALID (otheroverlay)); | |
2eec3b4e RS |
3293 | |
3294 | otherbeg = OVERLAY_START (otheroverlay); | |
3295 | if (OVERLAY_POSITION (otherbeg) >= where) | |
3296 | break; | |
1ab256cb | 3297 | } |
2eec3b4e RS |
3298 | |
3299 | /* Add TAIL to overlays_after before OTHER. */ | |
2410d73a SM |
3300 | tail->next = other; |
3301 | if (other_prev) | |
3302 | other_prev->next = tail; | |
1ab256cb | 3303 | else |
5c4f68f1 | 3304 | buf->overlays_after = tail; |
2eec3b4e | 3305 | tail = prev; |
1ab256cb | 3306 | } |
2eec3b4e RS |
3307 | else |
3308 | /* We've reached the things that should stay in overlays_before. | |
3309 | All the rest of overlays_before must end even earlier, | |
3310 | so stop now. */ | |
3311 | break; | |
3312 | } | |
3313 | ||
3314 | /* See if anything in overlays_after should be in overlays_before. */ | |
2410d73a SM |
3315 | prev = NULL; |
3316 | for (tail = buf->overlays_after; tail; prev = tail, tail = next) | |
2eec3b4e | 3317 | { |
2410d73a SM |
3318 | next = tail->next; |
3319 | XSETMISC (overlay, tail); | |
2eec3b4e RS |
3320 | |
3321 | /* If the overlay is not valid, get rid of it. */ | |
3322 | if (!OVERLAY_VALID (overlay)) | |
52f8ec73 JB |
3323 | #if 1 |
3324 | abort (); | |
3325 | #else | |
2eec3b4e RS |
3326 | { |
3327 | /* Splice the cons cell TAIL out of overlays_after. */ | |
3328 | if (!NILP (prev)) | |
7539e11f | 3329 | XCDR (prev) = next; |
2eec3b4e | 3330 | else |
5c4f68f1 | 3331 | buf->overlays_after = next; |
2eec3b4e RS |
3332 | tail = prev; |
3333 | continue; | |
3334 | } | |
52f8ec73 | 3335 | #endif |
2eec3b4e RS |
3336 | |
3337 | beg = OVERLAY_START (overlay); | |
3338 | end = OVERLAY_END (overlay); | |
3339 | ||
3340 | /* Stop looking, when we know that nothing further | |
3341 | can possibly end before POS. */ | |
3342 | if (OVERLAY_POSITION (beg) > pos) | |
3343 | break; | |
3344 | ||
3345 | if (OVERLAY_POSITION (end) <= pos) | |
3346 | { | |
3347 | /* OVERLAY needs to be moved. */ | |
3348 | int where = OVERLAY_POSITION (end); | |
2410d73a | 3349 | struct Lisp_Overlay *other, *other_prev; |
2eec3b4e RS |
3350 | |
3351 | /* Splice the cons cell TAIL out of overlays_after. */ | |
2410d73a SM |
3352 | if (prev) |
3353 | prev->next = next; | |
2eec3b4e | 3354 | else |
5c4f68f1 | 3355 | buf->overlays_after = next; |
2eec3b4e RS |
3356 | |
3357 | /* Search thru overlays_before for where to put it. */ | |
2410d73a SM |
3358 | other_prev = NULL; |
3359 | for (other = buf->overlays_before; other; | |
3360 | other_prev = other, other = other->next) | |
2eec3b4e RS |
3361 | { |
3362 | Lisp_Object otherend, otheroverlay; | |
2eec3b4e | 3363 | |
2410d73a SM |
3364 | XSETMISC (otheroverlay, other); |
3365 | eassert (OVERLAY_VALID (otheroverlay)); | |
2eec3b4e RS |
3366 | |
3367 | otherend = OVERLAY_END (otheroverlay); | |
3368 | if (OVERLAY_POSITION (otherend) <= where) | |
3369 | break; | |
3370 | } | |
3371 | ||
3372 | /* Add TAIL to overlays_before before OTHER. */ | |
2410d73a SM |
3373 | tail->next = other; |
3374 | if (other_prev) | |
3375 | other_prev->next = tail; | |
2eec3b4e | 3376 | else |
5c4f68f1 | 3377 | buf->overlays_before = tail; |
2eec3b4e RS |
3378 | tail = prev; |
3379 | } | |
3380 | } | |
3381 | ||
c2d5b10f | 3382 | buf->overlay_center = pos; |
2eec3b4e | 3383 | } |
2b1bdf65 | 3384 | |
423cdb46 KH |
3385 | void |
3386 | adjust_overlays_for_insert (pos, length) | |
c2d5b10f SM |
3387 | EMACS_INT pos; |
3388 | EMACS_INT length; | |
423cdb46 KH |
3389 | { |
3390 | /* After an insertion, the lists are still sorted properly, | |
3391 | but we may need to update the value of the overlay center. */ | |
c2d5b10f SM |
3392 | if (current_buffer->overlay_center >= pos) |
3393 | current_buffer->overlay_center += length; | |
423cdb46 KH |
3394 | } |
3395 | ||
3396 | void | |
3397 | adjust_overlays_for_delete (pos, length) | |
c2d5b10f SM |
3398 | EMACS_INT pos; |
3399 | EMACS_INT length; | |
423cdb46 | 3400 | { |
c2d5b10f | 3401 | if (current_buffer->overlay_center < pos) |
423cdb46 KH |
3402 | /* The deletion was to our right. No change needed; the before- and |
3403 | after-lists are still consistent. */ | |
3404 | ; | |
c2d5b10f | 3405 | else if (current_buffer->overlay_center > pos + length) |
423cdb46 KH |
3406 | /* The deletion was to our left. We need to adjust the center value |
3407 | to account for the change in position, but the lists are consistent | |
3408 | given the new value. */ | |
c2d5b10f | 3409 | current_buffer->overlay_center -= length; |
423cdb46 KH |
3410 | else |
3411 | /* We're right in the middle. There might be things on the after-list | |
3412 | that now belong on the before-list. Recentering will move them, | |
3413 | and also update the center point. */ | |
3414 | recenter_overlay_lists (current_buffer, pos); | |
3415 | } | |
3416 | ||
2b1bdf65 KH |
3417 | /* Fix up overlays that were garbled as a result of permuting markers |
3418 | in the range START through END. Any overlay with at least one | |
3419 | endpoint in this range will need to be unlinked from the overlay | |
3420 | list and reinserted in its proper place. | |
3421 | Such an overlay might even have negative size at this point. | |
6b61353c | 3422 | If so, we'll make the overlay empty. */ |
2b1bdf65 | 3423 | void |
6b61353c | 3424 | fix_start_end_in_overlays (start, end) |
2b1bdf65 KH |
3425 | register int start, end; |
3426 | { | |
6af718a4 | 3427 | Lisp_Object overlay; |
2410d73a | 3428 | struct Lisp_Overlay *before_list, *after_list; |
1138e742 KR |
3429 | /* These are either nil, indicating that before_list or after_list |
3430 | should be assigned, or the cons cell the cdr of which should be | |
3431 | assigned. */ | |
2410d73a | 3432 | struct Lisp_Overlay *beforep = NULL, *afterp = NULL; |
1138e742 KR |
3433 | /* 'Parent', likewise, indicates a cons cell or |
3434 | current_buffer->overlays_before or overlays_after, depending | |
3435 | which loop we're in. */ | |
2410d73a | 3436 | struct Lisp_Overlay *tail, *parent; |
2b1bdf65 KH |
3437 | int startpos, endpos; |
3438 | ||
3439 | /* This algorithm shifts links around instead of consing and GCing. | |
3440 | The loop invariant is that before_list (resp. after_list) is a | |
1138e742 KR |
3441 | well-formed list except that its last element, the CDR of beforep |
3442 | (resp. afterp) if beforep (afterp) isn't nil or before_list | |
3443 | (after_list) if it is, is still uninitialized. So it's not a bug | |
3444 | that before_list isn't initialized, although it may look | |
3445 | strange. */ | |
2410d73a | 3446 | for (parent = NULL, tail = current_buffer->overlays_before; tail;) |
2b1bdf65 | 3447 | { |
2410d73a | 3448 | XSETMISC (overlay, tail); |
6b61353c | 3449 | |
2b1bdf65 | 3450 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
6b61353c KH |
3451 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3452 | ||
3453 | /* If the overlay is backwards, make it empty. */ | |
3454 | if (endpos < startpos) | |
3455 | { | |
3456 | startpos = endpos; | |
3457 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
3458 | Qnil); | |
3459 | } | |
3460 | ||
2b1bdf65 KH |
3461 | if (endpos < start) |
3462 | break; | |
60ebfdf3 | 3463 | |
2b1bdf65 KH |
3464 | if (endpos < end |
3465 | || (startpos >= start && startpos < end)) | |
3466 | { | |
2b1bdf65 KH |
3467 | /* Add it to the end of the wrong list. Later on, |
3468 | recenter_overlay_lists will move it to the right place. */ | |
c2d5b10f | 3469 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3470 | { |
2410d73a | 3471 | if (!afterp) |
1138e742 KR |
3472 | after_list = tail; |
3473 | else | |
2410d73a | 3474 | afterp->next = tail; |
1138e742 | 3475 | afterp = tail; |
2b1bdf65 KH |
3476 | } |
3477 | else | |
3478 | { | |
2410d73a | 3479 | if (!beforep) |
1138e742 KR |
3480 | before_list = tail; |
3481 | else | |
2410d73a | 3482 | beforep->next = tail; |
1138e742 | 3483 | beforep = tail; |
2b1bdf65 | 3484 | } |
2410d73a SM |
3485 | if (!parent) |
3486 | current_buffer->overlays_before = tail->next; | |
1138e742 | 3487 | else |
2410d73a SM |
3488 | parent->next = tail->next; |
3489 | tail = tail->next; | |
2b1bdf65 KH |
3490 | } |
3491 | else | |
2410d73a | 3492 | parent = tail, tail = parent->next; |
2b1bdf65 | 3493 | } |
2410d73a | 3494 | for (parent = NULL, tail = current_buffer->overlays_after; tail;) |
2b1bdf65 | 3495 | { |
2410d73a | 3496 | XSETMISC (overlay, tail); |
6b61353c | 3497 | |
2b1bdf65 | 3498 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
6b61353c KH |
3499 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
3500 | ||
3501 | /* If the overlay is backwards, make it empty. */ | |
3502 | if (endpos < startpos) | |
3503 | { | |
3504 | startpos = endpos; | |
3505 | Fset_marker (OVERLAY_START (overlay), make_number (startpos), | |
60ebfdf3 | 3506 | Qnil); |
6b61353c KH |
3507 | } |
3508 | ||
2b1bdf65 KH |
3509 | if (startpos >= end) |
3510 | break; | |
6b61353c | 3511 | |
2b1bdf65 KH |
3512 | if (startpos >= start |
3513 | || (endpos >= start && endpos < end)) | |
3514 | { | |
c2d5b10f | 3515 | if (endpos < current_buffer->overlay_center) |
2b1bdf65 | 3516 | { |
2410d73a | 3517 | if (!afterp) |
1138e742 KR |
3518 | after_list = tail; |
3519 | else | |
2410d73a | 3520 | afterp->next = tail; |
1138e742 | 3521 | afterp = tail; |
2b1bdf65 KH |
3522 | } |
3523 | else | |
3524 | { | |
2410d73a | 3525 | if (!beforep) |
1138e742 KR |
3526 | before_list = tail; |
3527 | else | |
2410d73a | 3528 | beforep->next = tail; |
1138e742 | 3529 | beforep = tail; |
2b1bdf65 | 3530 | } |
2410d73a SM |
3531 | if (!parent) |
3532 | current_buffer->overlays_after = tail->next; | |
1138e742 | 3533 | else |
2410d73a SM |
3534 | parent->next = tail->next; |
3535 | tail = tail->next; | |
2b1bdf65 KH |
3536 | } |
3537 | else | |
2410d73a | 3538 | parent = tail, tail = parent->next; |
2b1bdf65 KH |
3539 | } |
3540 | ||
3541 | /* Splice the constructed (wrong) lists into the buffer's lists, | |
3542 | and let the recenter function make it sane again. */ | |
2410d73a | 3543 | if (beforep) |
1138e742 | 3544 | { |
2410d73a | 3545 | beforep->next = current_buffer->overlays_before; |
1138e742 KR |
3546 | current_buffer->overlays_before = before_list; |
3547 | } | |
c2d5b10f | 3548 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3549 | |
2410d73a | 3550 | if (afterp) |
1138e742 | 3551 | { |
2410d73a | 3552 | afterp->next = current_buffer->overlays_after; |
1138e742 KR |
3553 | current_buffer->overlays_after = after_list; |
3554 | } | |
c2d5b10f | 3555 | recenter_overlay_lists (current_buffer, current_buffer->overlay_center); |
2b1bdf65 | 3556 | } |
3b06f880 KH |
3557 | |
3558 | /* We have two types of overlay: the one whose ending marker is | |
3559 | after-insertion-marker (this is the usual case) and the one whose | |
3560 | ending marker is before-insertion-marker. When `overlays_before' | |
3561 | contains overlays of the latter type and the former type in this | |
3562 | order and both overlays end at inserting position, inserting a text | |
3563 | increases only the ending marker of the latter type, which results | |
3564 | in incorrect ordering of `overlays_before'. | |
3565 | ||
3566 | This function fixes ordering of overlays in the slot | |
3567 | `overlays_before' of the buffer *BP. Before the insertion, `point' | |
3568 | was at PREV, and now is at POS. */ | |
3569 | ||
01136e9b | 3570 | void |
3b06f880 KH |
3571 | fix_overlays_before (bp, prev, pos) |
3572 | struct buffer *bp; | |
c2d5b10f | 3573 | EMACS_INT prev, pos; |
3b06f880 | 3574 | { |
2410d73a SM |
3575 | /* If parent is nil, replace overlays_before; otherwise, parent->next. */ |
3576 | struct Lisp_Overlay *tail = bp->overlays_before, *parent = NULL, *right_pair; | |
3577 | Lisp_Object tem; | |
c2d5b10f | 3578 | EMACS_INT end; |
3b06f880 KH |
3579 | |
3580 | /* After the insertion, the several overlays may be in incorrect | |
3581 | order. The possibility is that, in the list `overlays_before', | |
3582 | an overlay which ends at POS appears after an overlay which ends | |
3583 | at PREV. Since POS is greater than PREV, we must fix the | |
3584 | ordering of these overlays, by moving overlays ends at POS before | |
3585 | the overlays ends at PREV. */ | |
3586 | ||
3587 | /* At first, find a place where disordered overlays should be linked | |
3588 | in. It is where an overlay which end before POS exists. (i.e. an | |
3589 | overlay whose ending marker is after-insertion-marker if disorder | |
3590 | exists). */ | |
2410d73a SM |
3591 | while (tail |
3592 | && (XSETMISC (tem, tail), | |
3593 | (end = OVERLAY_POSITION (OVERLAY_END (tem))) >= pos)) | |
1138e742 KR |
3594 | { |
3595 | parent = tail; | |
2410d73a | 3596 | tail = tail->next; |
1138e742 | 3597 | } |
3b06f880 KH |
3598 | |
3599 | /* If we don't find such an overlay, | |
3600 | or the found one ends before PREV, | |
3601 | or the found one is the last one in the list, | |
3602 | we don't have to fix anything. */ | |
f93ad4cf | 3603 | if (!tail || end < prev || !tail->next) |
3b06f880 KH |
3604 | return; |
3605 | ||
1138e742 KR |
3606 | right_pair = parent; |
3607 | parent = tail; | |
2410d73a | 3608 | tail = tail->next; |
3b06f880 | 3609 | |
1138e742 | 3610 | /* Now, end position of overlays in the list TAIL should be before |
3b06f880 | 3611 | or equal to PREV. In the loop, an overlay which ends at POS is |
1138e742 KR |
3612 | moved ahead to the place indicated by the CDR of RIGHT_PAIR. If |
3613 | we found an overlay which ends before PREV, the remaining | |
3614 | overlays are in correct order. */ | |
2410d73a | 3615 | while (tail) |
3b06f880 | 3616 | { |
2410d73a SM |
3617 | XSETMISC (tem, tail); |
3618 | end = OVERLAY_POSITION (OVERLAY_END (tem)); | |
3b06f880 KH |
3619 | |
3620 | if (end == pos) | |
3621 | { /* This overlay is disordered. */ | |
2410d73a | 3622 | struct Lisp_Overlay *found = tail; |
3b06f880 KH |
3623 | |
3624 | /* Unlink the found overlay. */ | |
2410d73a SM |
3625 | tail = found->next; |
3626 | parent->next = tail; | |
1138e742 KR |
3627 | /* Move an overlay at RIGHT_PLACE to the next of the found one, |
3628 | and link it into the right place. */ | |
2410d73a | 3629 | if (!right_pair) |
1138e742 | 3630 | { |
2410d73a | 3631 | found->next = bp->overlays_before; |
1138e742 KR |
3632 | bp->overlays_before = found; |
3633 | } | |
3634 | else | |
3635 | { | |
2410d73a SM |
3636 | found->next = right_pair->next; |
3637 | right_pair->next = found; | |
1138e742 | 3638 | } |
3b06f880 KH |
3639 | } |
3640 | else if (end == prev) | |
1138e742 KR |
3641 | { |
3642 | parent = tail; | |
2410d73a | 3643 | tail = tail->next; |
1138e742 | 3644 | } |
3b06f880 KH |
3645 | else /* No more disordered overlay. */ |
3646 | break; | |
3647 | } | |
3648 | } | |
2eec3b4e | 3649 | \f |
52f8ec73 | 3650 | DEFUN ("overlayp", Foverlayp, Soverlayp, 1, 1, 0, |
7ee72033 MB |
3651 | doc: /* Return t if OBJECT is an overlay. */) |
3652 | (object) | |
52f8ec73 JB |
3653 | Lisp_Object object; |
3654 | { | |
3655 | return (OVERLAYP (object) ? Qt : Qnil); | |
3656 | } | |
3657 | ||
acac2700 | 3658 | DEFUN ("make-overlay", Fmake_overlay, Smake_overlay, 2, 5, 0, |
7ee72033 | 3659 | doc: /* Create a new overlay with range BEG to END in BUFFER. |
018ba359 PJ |
3660 | If omitted, BUFFER defaults to the current buffer. |
3661 | BEG and END may be integers or markers. | |
a625ee20 RS |
3662 | The fourth arg FRONT-ADVANCE, if non-nil, makes the marker |
3663 | for the front of the overlay advance when text is inserted there | |
63af6055 | 3664 | \(which means the text *is not* included in the overlay). |
a625ee20 RS |
3665 | The fifth arg REAR-ADVANCE, if non-nil, makes the marker |
3666 | for the rear of the overlay advance when text is inserted there | |
63af6055 | 3667 | \(which means the text *is* included in the overlay). */) |
7ee72033 | 3668 | (beg, end, buffer, front_advance, rear_advance) |
5c4f68f1 | 3669 | Lisp_Object beg, end, buffer; |
acac2700 | 3670 | Lisp_Object front_advance, rear_advance; |
2eec3b4e RS |
3671 | { |
3672 | Lisp_Object overlay; | |
5c4f68f1 | 3673 | struct buffer *b; |
2eec3b4e | 3674 | |
5c4f68f1 | 3675 | if (NILP (buffer)) |
67180c6a | 3676 | XSETBUFFER (buffer, current_buffer); |
883047b9 | 3677 | else |
b7826503 | 3678 | CHECK_BUFFER (buffer); |
883047b9 JB |
3679 | if (MARKERP (beg) |
3680 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3681 | error ("Marker points into wrong buffer"); | |
3682 | if (MARKERP (end) | |
3683 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3684 | error ("Marker points into wrong buffer"); | |
2eec3b4e | 3685 | |
b7826503 PJ |
3686 | CHECK_NUMBER_COERCE_MARKER (beg); |
3687 | CHECK_NUMBER_COERCE_MARKER (end); | |
5c4f68f1 | 3688 | |
883047b9 | 3689 | if (XINT (beg) > XINT (end)) |
5c4f68f1 | 3690 | { |
c99fc30f KH |
3691 | Lisp_Object temp; |
3692 | temp = beg; beg = end; end = temp; | |
5c4f68f1 | 3693 | } |
883047b9 JB |
3694 | |
3695 | b = XBUFFER (buffer); | |
3696 | ||
3697 | beg = Fset_marker (Fmake_marker (), beg, buffer); | |
3698 | end = Fset_marker (Fmake_marker (), end, buffer); | |
5c4f68f1 | 3699 | |
acac2700 RS |
3700 | if (!NILP (front_advance)) |
3701 | XMARKER (beg)->insertion_type = 1; | |
3702 | if (!NILP (rear_advance)) | |
3703 | XMARKER (end)->insertion_type = 1; | |
597dd755 | 3704 | |
48e2e3ba | 3705 | overlay = allocate_misc (); |
89ca3e1b | 3706 | XMISCTYPE (overlay) = Lisp_Misc_Overlay; |
48e2e3ba KH |
3707 | XOVERLAY (overlay)->start = beg; |
3708 | XOVERLAY (overlay)->end = end; | |
3709 | XOVERLAY (overlay)->plist = Qnil; | |
2410d73a | 3710 | XOVERLAY (overlay)->next = NULL; |
2eec3b4e | 3711 | |
177c0ea7 | 3712 | /* Put the new overlay on the wrong list. */ |
2eec3b4e | 3713 | end = OVERLAY_END (overlay); |
c2d5b10f | 3714 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a SM |
3715 | { |
3716 | if (b->overlays_after) | |
3717 | XOVERLAY (overlay)->next = b->overlays_after; | |
3718 | b->overlays_after = XOVERLAY (overlay); | |
3719 | } | |
2eec3b4e | 3720 | else |
2410d73a SM |
3721 | { |
3722 | if (b->overlays_before) | |
3723 | XOVERLAY (overlay)->next = b->overlays_before; | |
3724 | b->overlays_before = XOVERLAY (overlay); | |
3725 | } | |
2eec3b4e RS |
3726 | |
3727 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3728 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3729 | |
b61982dd JB |
3730 | /* We don't need to redisplay the region covered by the overlay, because |
3731 | the overlay has no properties at the moment. */ | |
3732 | ||
2eec3b4e RS |
3733 | return overlay; |
3734 | } | |
876aa27c RS |
3735 | \f |
3736 | /* Mark a section of BUF as needing redisplay because of overlays changes. */ | |
3737 | ||
3738 | static void | |
3739 | modify_overlay (buf, start, end) | |
3740 | struct buffer *buf; | |
c2d5b10f | 3741 | EMACS_INT start, end; |
876aa27c | 3742 | { |
876aa27c RS |
3743 | if (start > end) |
3744 | { | |
3745 | int temp = start; | |
26f545d7 GM |
3746 | start = end; |
3747 | end = temp; | |
876aa27c RS |
3748 | } |
3749 | ||
481b5054 | 3750 | BUF_COMPUTE_UNCHANGED (buf, start, end); |
177c0ea7 | 3751 | |
876aa27c RS |
3752 | /* If this is a buffer not in the selected window, |
3753 | we must do other windows. */ | |
3754 | if (buf != XBUFFER (XWINDOW (selected_window)->buffer)) | |
3755 | windows_or_buffers_changed = 1; | |
876aa27c RS |
3756 | /* If multiple windows show this buffer, we must do other windows. */ |
3757 | else if (buffer_shared > 1) | |
3758 | windows_or_buffers_changed = 1; | |
18700091 KS |
3759 | /* If we modify an overlay at the end of the buffer, we cannot |
3760 | be sure that window end is still valid. */ | |
3761 | else if (end >= ZV && start <= ZV) | |
3762 | windows_or_buffers_changed = 1; | |
876aa27c | 3763 | |
d8b9150f | 3764 | ++BUF_OVERLAY_MODIFF (buf); |
876aa27c | 3765 | } |
2eec3b4e | 3766 | |
018ba359 | 3767 | \f |
2e34157c RS |
3768 | Lisp_Object Fdelete_overlay (); |
3769 | ||
2410d73a SM |
3770 | static struct Lisp_Overlay * |
3771 | unchain_overlay (list, overlay) | |
3772 | struct Lisp_Overlay *list, *overlay; | |
3773 | { | |
3774 | struct Lisp_Overlay *tmp, *prev; | |
3775 | for (tmp = list, prev = NULL; tmp; prev = tmp, tmp = tmp->next) | |
3776 | if (tmp == overlay) | |
3777 | { | |
3778 | if (prev) | |
3779 | prev->next = tmp->next; | |
3780 | else | |
3781 | list = tmp->next; | |
3782 | overlay->next = NULL; | |
3783 | break; | |
3784 | } | |
3785 | return list; | |
3786 | } | |
3787 | ||
5c4f68f1 | 3788 | DEFUN ("move-overlay", Fmove_overlay, Smove_overlay, 3, 4, 0, |
7ee72033 | 3789 | doc: /* Set the endpoints of OVERLAY to BEG and END in BUFFER. |
018ba359 PJ |
3790 | If BUFFER is omitted, leave OVERLAY in the same buffer it inhabits now. |
3791 | If BUFFER is omitted, and OVERLAY is in no buffer, put it in the current | |
7ee72033 MB |
3792 | buffer. */) |
3793 | (overlay, beg, end, buffer) | |
5c4f68f1 | 3794 | Lisp_Object overlay, beg, end, buffer; |
2eec3b4e | 3795 | { |
0a4469c9 RS |
3796 | struct buffer *b, *ob; |
3797 | Lisp_Object obuffer; | |
aed13378 | 3798 | int count = SPECPDL_INDEX (); |
5c4f68f1 | 3799 | |
b7826503 | 3800 | CHECK_OVERLAY (overlay); |
5c4f68f1 JB |
3801 | if (NILP (buffer)) |
3802 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); | |
3ece337a | 3803 | if (NILP (buffer)) |
67180c6a | 3804 | XSETBUFFER (buffer, current_buffer); |
b7826503 | 3805 | CHECK_BUFFER (buffer); |
883047b9 JB |
3806 | |
3807 | if (MARKERP (beg) | |
3808 | && ! EQ (Fmarker_buffer (beg), buffer)) | |
3809 | error ("Marker points into wrong buffer"); | |
3810 | if (MARKERP (end) | |
3811 | && ! EQ (Fmarker_buffer (end), buffer)) | |
3812 | error ("Marker points into wrong buffer"); | |
3813 | ||
b7826503 PJ |
3814 | CHECK_NUMBER_COERCE_MARKER (beg); |
3815 | CHECK_NUMBER_COERCE_MARKER (end); | |
b61982dd | 3816 | |
9d7608b7 KH |
3817 | if (XINT (beg) == XINT (end) && ! NILP (Foverlay_get (overlay, Qevaporate))) |
3818 | return Fdelete_overlay (overlay); | |
0a4469c9 | 3819 | |
b61982dd JB |
3820 | if (XINT (beg) > XINT (end)) |
3821 | { | |
c99fc30f KH |
3822 | Lisp_Object temp; |
3823 | temp = beg; beg = end; end = temp; | |
b61982dd JB |
3824 | } |
3825 | ||
9d7608b7 KH |
3826 | specbind (Qinhibit_quit, Qt); |
3827 | ||
0a4469c9 | 3828 | obuffer = Fmarker_buffer (OVERLAY_START (overlay)); |
5c4f68f1 | 3829 | b = XBUFFER (buffer); |
8801a864 | 3830 | ob = BUFFERP (obuffer) ? XBUFFER (obuffer) : (struct buffer *) 0; |
2eec3b4e | 3831 | |
c82ed728 | 3832 | /* If the overlay has changed buffers, do a thorough redisplay. */ |
0a4469c9 | 3833 | if (!EQ (buffer, obuffer)) |
50760c4a RS |
3834 | { |
3835 | /* Redisplay where the overlay was. */ | |
3836 | if (!NILP (obuffer)) | |
3837 | { | |
2e34157c RS |
3838 | int o_beg; |
3839 | int o_end; | |
50760c4a | 3840 | |
80509f2f RS |
3841 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3842 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
50760c4a | 3843 | |
2e34157c | 3844 | modify_overlay (ob, o_beg, o_end); |
50760c4a RS |
3845 | } |
3846 | ||
3847 | /* Redisplay where the overlay is going to be. */ | |
876aa27c | 3848 | modify_overlay (b, XINT (beg), XINT (end)); |
50760c4a | 3849 | } |
c82ed728 JB |
3850 | else |
3851 | /* Redisplay the area the overlay has just left, or just enclosed. */ | |
3852 | { | |
2e34157c | 3853 | int o_beg, o_end; |
c82ed728 | 3854 | |
80509f2f RS |
3855 | o_beg = OVERLAY_POSITION (OVERLAY_START (overlay)); |
3856 | o_end = OVERLAY_POSITION (OVERLAY_END (overlay)); | |
c82ed728 | 3857 | |
2e34157c RS |
3858 | if (o_beg == XINT (beg)) |
3859 | modify_overlay (b, o_end, XINT (end)); | |
3860 | else if (o_end == XINT (end)) | |
3861 | modify_overlay (b, o_beg, XINT (beg)); | |
c82ed728 JB |
3862 | else |
3863 | { | |
2e34157c RS |
3864 | if (XINT (beg) < o_beg) o_beg = XINT (beg); |
3865 | if (XINT (end) > o_end) o_end = XINT (end); | |
3866 | modify_overlay (b, o_beg, o_end); | |
c82ed728 JB |
3867 | } |
3868 | } | |
b61982dd | 3869 | |
0a4469c9 RS |
3870 | if (!NILP (obuffer)) |
3871 | { | |
2410d73a SM |
3872 | ob->overlays_before |
3873 | = unchain_overlay (ob->overlays_before, XOVERLAY (overlay)); | |
3874 | ob->overlays_after | |
3875 | = unchain_overlay (ob->overlays_after, XOVERLAY (overlay)); | |
3876 | eassert (XOVERLAY (overlay)->next == NULL); | |
0a4469c9 | 3877 | } |
5c4f68f1 JB |
3878 | |
3879 | Fset_marker (OVERLAY_START (overlay), beg, buffer); | |
3880 | Fset_marker (OVERLAY_END (overlay), end, buffer); | |
2eec3b4e | 3881 | |
177c0ea7 | 3882 | /* Put the overlay on the wrong list. */ |
2eec3b4e | 3883 | end = OVERLAY_END (overlay); |
c2d5b10f | 3884 | if (OVERLAY_POSITION (end) < b->overlay_center) |
2410d73a | 3885 | { |
8f924df7 KH |
3886 | XOVERLAY (overlay)->next = b->overlays_after; |
3887 | b->overlays_after = XOVERLAY (overlay); | |
2410d73a | 3888 | } |
2eec3b4e | 3889 | else |
2410d73a | 3890 | { |
8f924df7 KH |
3891 | XOVERLAY (overlay)->next = b->overlays_before; |
3892 | b->overlays_before = XOVERLAY (overlay); | |
2410d73a | 3893 | } |
2eec3b4e RS |
3894 | |
3895 | /* This puts it in the right list, and in the right order. */ | |
c2d5b10f | 3896 | recenter_overlay_lists (b, b->overlay_center); |
2eec3b4e | 3897 | |
0a4469c9 | 3898 | return unbind_to (count, overlay); |
2eec3b4e RS |
3899 | } |
3900 | ||
3901 | DEFUN ("delete-overlay", Fdelete_overlay, Sdelete_overlay, 1, 1, 0, | |
7ee72033 MB |
3902 | doc: /* Delete the overlay OVERLAY from its buffer. */) |
3903 | (overlay) | |
5c4f68f1 | 3904 | Lisp_Object overlay; |
2eec3b4e | 3905 | { |
0a4469c9 | 3906 | Lisp_Object buffer; |
5c4f68f1 | 3907 | struct buffer *b; |
aed13378 | 3908 | int count = SPECPDL_INDEX (); |
5c4f68f1 | 3909 | |
b7826503 | 3910 | CHECK_OVERLAY (overlay); |
52f8ec73 | 3911 | |
0a4469c9 RS |
3912 | buffer = Fmarker_buffer (OVERLAY_START (overlay)); |
3913 | if (NILP (buffer)) | |
3914 | return Qnil; | |
3915 | ||
3916 | b = XBUFFER (buffer); | |
0a4469c9 | 3917 | specbind (Qinhibit_quit, Qt); |
177c0ea7 | 3918 | |
2410d73a SM |
3919 | b->overlays_before = unchain_overlay (b->overlays_before,XOVERLAY (overlay)); |
3920 | b->overlays_after = unchain_overlay (b->overlays_after, XOVERLAY (overlay)); | |
3921 | eassert (XOVERLAY (overlay)->next == NULL); | |
876aa27c | 3922 | modify_overlay (b, |
8231a9aa RS |
3923 | marker_position (OVERLAY_START (overlay)), |
3924 | marker_position (OVERLAY_END (overlay))); | |
3ece337a JB |
3925 | Fset_marker (OVERLAY_START (overlay), Qnil, Qnil); |
3926 | Fset_marker (OVERLAY_END (overlay), Qnil, Qnil); | |
3927 | ||
e58c389d | 3928 | /* When deleting an overlay with before or after strings, turn off |
26f545d7 GM |
3929 | display optimizations for the affected buffer, on the basis that |
3930 | these strings may contain newlines. This is easier to do than to | |
3931 | check for that situation during redisplay. */ | |
3932 | if (!windows_or_buffers_changed | |
3933 | && (!NILP (Foverlay_get (overlay, Qbefore_string)) | |
3934 | || !NILP (Foverlay_get (overlay, Qafter_string)))) | |
3935 | b->prevent_redisplay_optimizations_p = 1; | |
3936 | ||
0a4469c9 | 3937 | return unbind_to (count, Qnil); |
2eec3b4e RS |
3938 | } |
3939 | \f | |
8ebafa8d JB |
3940 | /* Overlay dissection functions. */ |
3941 | ||
3942 | DEFUN ("overlay-start", Foverlay_start, Soverlay_start, 1, 1, 0, | |
7ee72033 MB |
3943 | doc: /* Return the position at which OVERLAY starts. */) |
3944 | (overlay) | |
8ebafa8d JB |
3945 | Lisp_Object overlay; |
3946 | { | |
b7826503 | 3947 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3948 | |
3949 | return (Fmarker_position (OVERLAY_START (overlay))); | |
3950 | } | |
3951 | ||
3952 | DEFUN ("overlay-end", Foverlay_end, Soverlay_end, 1, 1, 0, | |
7ee72033 MB |
3953 | doc: /* Return the position at which OVERLAY ends. */) |
3954 | (overlay) | |
8ebafa8d JB |
3955 | Lisp_Object overlay; |
3956 | { | |
b7826503 | 3957 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3958 | |
3959 | return (Fmarker_position (OVERLAY_END (overlay))); | |
3960 | } | |
3961 | ||
3962 | DEFUN ("overlay-buffer", Foverlay_buffer, Soverlay_buffer, 1, 1, 0, | |
563f7128 LK |
3963 | doc: /* Return the buffer OVERLAY belongs to. |
3964 | Return nil if OVERLAY has been deleted. */) | |
7ee72033 | 3965 | (overlay) |
8ebafa8d JB |
3966 | Lisp_Object overlay; |
3967 | { | |
b7826503 | 3968 | CHECK_OVERLAY (overlay); |
8ebafa8d JB |
3969 | |
3970 | return Fmarker_buffer (OVERLAY_START (overlay)); | |
3971 | } | |
3972 | ||
3973 | DEFUN ("overlay-properties", Foverlay_properties, Soverlay_properties, 1, 1, 0, | |
7ee72033 | 3974 | doc: /* Return a list of the properties on OVERLAY. |
018ba359 | 3975 | This is a copy of OVERLAY's plist; modifying its conses has no effect on |
7ee72033 MB |
3976 | OVERLAY. */) |
3977 | (overlay) | |
8ebafa8d JB |
3978 | Lisp_Object overlay; |
3979 | { | |
b7826503 | 3980 | CHECK_OVERLAY (overlay); |
8ebafa8d | 3981 | |
48e2e3ba | 3982 | return Fcopy_sequence (XOVERLAY (overlay)->plist); |
8ebafa8d JB |
3983 | } |
3984 | ||
3985 | \f | |
2eec3b4e | 3986 | DEFUN ("overlays-at", Foverlays_at, Soverlays_at, 1, 1, 0, |
aabc29c8 | 3987 | doc: /* Return a list of the overlays that contain the character at POS. */) |
7ee72033 | 3988 | (pos) |
2eec3b4e RS |
3989 | Lisp_Object pos; |
3990 | { | |
3991 | int noverlays; | |
2eec3b4e RS |
3992 | Lisp_Object *overlay_vec; |
3993 | int len; | |
3994 | Lisp_Object result; | |
3995 | ||
b7826503 | 3996 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
3997 | |
3998 | len = 10; | |
a9800ae8 | 3999 | /* We can't use alloca here because overlays_at can call xrealloc. */ |
2eec3b4e RS |
4000 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); |
4001 | ||
4002 | /* Put all the overlays we want in a vector in overlay_vec. | |
4003 | Store the length in len. */ | |
2a77a7d7 | 4004 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
ac869cf7 | 4005 | (int *) 0, (int *) 0, 0); |
2eec3b4e RS |
4006 | |
4007 | /* Make a list of them all. */ | |
4008 | result = Flist (noverlays, overlay_vec); | |
4009 | ||
9ac0d9e0 | 4010 | xfree (overlay_vec); |
2eec3b4e RS |
4011 | return result; |
4012 | } | |
4013 | ||
74514898 | 4014 | DEFUN ("overlays-in", Foverlays_in, Soverlays_in, 2, 2, 0, |
7ee72033 | 4015 | doc: /* Return a list of the overlays that overlap the region BEG ... END. |
018ba359 PJ |
4016 | Overlap means that at least one character is contained within the overlay |
4017 | and also contained within the specified region. | |
4018 | Empty overlays are included in the result if they are located at BEG | |
7ee72033 MB |
4019 | or between BEG and END. */) |
4020 | (beg, end) | |
74514898 RS |
4021 | Lisp_Object beg, end; |
4022 | { | |
4023 | int noverlays; | |
4024 | Lisp_Object *overlay_vec; | |
4025 | int len; | |
4026 | Lisp_Object result; | |
4027 | ||
b7826503 PJ |
4028 | CHECK_NUMBER_COERCE_MARKER (beg); |
4029 | CHECK_NUMBER_COERCE_MARKER (end); | |
74514898 RS |
4030 | |
4031 | len = 10; | |
4032 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
4033 | ||
4034 | /* Put all the overlays we want in a vector in overlay_vec. | |
4035 | Store the length in len. */ | |
4036 | noverlays = overlays_in (XINT (beg), XINT (end), 1, &overlay_vec, &len, | |
4037 | (int *) 0, (int *) 0); | |
4038 | ||
4039 | /* Make a list of them all. */ | |
4040 | result = Flist (noverlays, overlay_vec); | |
4041 | ||
4042 | xfree (overlay_vec); | |
4043 | return result; | |
4044 | } | |
4045 | ||
2eec3b4e | 4046 | DEFUN ("next-overlay-change", Fnext_overlay_change, Snext_overlay_change, |
efc7e75f | 4047 | 1, 1, 0, |
7ee72033 | 4048 | doc: /* Return the next position after POS where an overlay starts or ends. |
624d2678 RS |
4049 | If there are no overlay boundaries from POS to (point-max), |
4050 | the value is (point-max). */) | |
7ee72033 | 4051 | (pos) |
2eec3b4e RS |
4052 | Lisp_Object pos; |
4053 | { | |
4054 | int noverlays; | |
4055 | int endpos; | |
4056 | Lisp_Object *overlay_vec; | |
4057 | int len; | |
2eec3b4e RS |
4058 | int i; |
4059 | ||
b7826503 | 4060 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e RS |
4061 | |
4062 | len = 10; | |
4063 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
4064 | ||
4065 | /* Put all the overlays we want in a vector in overlay_vec. | |
4066 | Store the length in len. | |
4067 | endpos gets the position where the next overlay starts. */ | |
2a77a7d7 | 4068 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
ac869cf7 | 4069 | &endpos, (int *) 0, 1); |
2eec3b4e RS |
4070 | |
4071 | /* If any of these overlays ends before endpos, | |
4072 | use its ending point instead. */ | |
4073 | for (i = 0; i < noverlays; i++) | |
4074 | { | |
4075 | Lisp_Object oend; | |
4076 | int oendpos; | |
4077 | ||
4078 | oend = OVERLAY_END (overlay_vec[i]); | |
4079 | oendpos = OVERLAY_POSITION (oend); | |
4080 | if (oendpos < endpos) | |
4081 | endpos = oendpos; | |
1ab256cb RM |
4082 | } |
4083 | ||
9ac0d9e0 | 4084 | xfree (overlay_vec); |
2eec3b4e RS |
4085 | return make_number (endpos); |
4086 | } | |
239c932b RS |
4087 | |
4088 | DEFUN ("previous-overlay-change", Fprevious_overlay_change, | |
4089 | Sprevious_overlay_change, 1, 1, 0, | |
7ee72033 | 4090 | doc: /* Return the previous position before POS where an overlay starts or ends. |
624d2678 RS |
4091 | If there are no overlay boundaries from (point-min) to POS, |
4092 | the value is (point-min). */) | |
7ee72033 | 4093 | (pos) |
239c932b RS |
4094 | Lisp_Object pos; |
4095 | { | |
4096 | int noverlays; | |
4097 | int prevpos; | |
4098 | Lisp_Object *overlay_vec; | |
4099 | int len; | |
239c932b | 4100 | |
b7826503 | 4101 | CHECK_NUMBER_COERCE_MARKER (pos); |
239c932b | 4102 | |
624bbdc4 RS |
4103 | /* At beginning of buffer, we know the answer; |
4104 | avoid bug subtracting 1 below. */ | |
4105 | if (XINT (pos) == BEGV) | |
4106 | return pos; | |
4107 | ||
017f0539 GM |
4108 | len = 10; |
4109 | overlay_vec = (Lisp_Object *) xmalloc (len * sizeof (Lisp_Object)); | |
4110 | ||
239c932b RS |
4111 | /* Put all the overlays we want in a vector in overlay_vec. |
4112 | Store the length in len. | |
daa1c109 | 4113 | prevpos gets the position of the previous change. */ |
2a77a7d7 | 4114 | noverlays = overlays_at (XINT (pos), 1, &overlay_vec, &len, |
ac869cf7 | 4115 | (int *) 0, &prevpos, 1); |
239c932b | 4116 | |
239c932b RS |
4117 | xfree (overlay_vec); |
4118 | return make_number (prevpos); | |
4119 | } | |
2eec3b4e RS |
4120 | \f |
4121 | /* These functions are for debugging overlays. */ | |
4122 | ||
4123 | DEFUN ("overlay-lists", Foverlay_lists, Soverlay_lists, 0, 0, 0, | |
7ee72033 | 4124 | doc: /* Return a pair of lists giving all the overlays of the current buffer. |
018ba359 PJ |
4125 | The car has all the overlays before the overlay center; |
4126 | the cdr has all the overlays after the overlay center. | |
4127 | Recentering overlays moves overlays between these lists. | |
4128 | The lists you get are copies, so that changing them has no effect. | |
7ee72033 MB |
4129 | However, the overlays you get are the real objects that the buffer uses. */) |
4130 | () | |
2eec3b4e | 4131 | { |
2410d73a SM |
4132 | struct Lisp_Overlay *ol; |
4133 | Lisp_Object before = Qnil, after = Qnil, tmp; | |
4134 | for (ol = current_buffer->overlays_before; ol; ol = ol->next) | |
4135 | { | |
4136 | XSETMISC (tmp, ol); | |
4137 | before = Fcons (tmp, before); | |
4138 | } | |
4139 | for (ol = current_buffer->overlays_after; ol; ol = ol->next) | |
4140 | { | |
4141 | XSETMISC (tmp, ol); | |
4142 | after = Fcons (tmp, after); | |
4143 | } | |
4144 | return Fcons (Fnreverse (before), Fnreverse (after)); | |
2eec3b4e RS |
4145 | } |
4146 | ||
4147 | DEFUN ("overlay-recenter", Foverlay_recenter, Soverlay_recenter, 1, 1, 0, | |
c87426c5 RS |
4148 | doc: /* Recenter the overlays of the current buffer around position POS. |
4149 | That makes overlay lookup faster for positions near POS (but perhaps slower | |
4150 | for positions far away from POS). */) | |
7ee72033 | 4151 | (pos) |
2eec3b4e RS |
4152 | Lisp_Object pos; |
4153 | { | |
b7826503 | 4154 | CHECK_NUMBER_COERCE_MARKER (pos); |
2eec3b4e | 4155 | |
5c4f68f1 | 4156 | recenter_overlay_lists (current_buffer, XINT (pos)); |
2eec3b4e RS |
4157 | return Qnil; |
4158 | } | |
4159 | \f | |
4160 | DEFUN ("overlay-get", Foverlay_get, Soverlay_get, 2, 2, 0, | |
7ee72033 MB |
4161 | doc: /* Get the property of overlay OVERLAY with property name PROP. */) |
4162 | (overlay, prop) | |
2eec3b4e RS |
4163 | Lisp_Object overlay, prop; |
4164 | { | |
b7826503 | 4165 | CHECK_OVERLAY (overlay); |
9a593927 | 4166 | return lookup_char_property (XOVERLAY (overlay)->plist, prop, 0); |
2eec3b4e RS |
4167 | } |
4168 | ||
4169 | DEFUN ("overlay-put", Foverlay_put, Soverlay_put, 3, 3, 0, | |
7ee72033 MB |
4170 | doc: /* Set one property of overlay OVERLAY: give property PROP value VALUE. */) |
4171 | (overlay, prop, value) | |
2eec3b4e RS |
4172 | Lisp_Object overlay, prop, value; |
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 | |
4230 | add_overlay_mod_hooklist (functionlist, overlay) | |
4231 | Lisp_Object functionlist, overlay; | |
4232 | { | |
4233 | int oldsize = XVECTOR (last_overlay_modification_hooks)->size; | |
4234 | ||
4235 | if (last_overlay_modification_hooks_used == oldsize) | |
de0280a2 EZ |
4236 | last_overlay_modification_hooks = larger_vector |
4237 | (last_overlay_modification_hooks, oldsize * 2, Qnil); | |
3ae565b3 SM |
4238 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, |
4239 | functionlist); last_overlay_modification_hooks_used++; | |
4240 | ASET (last_overlay_modification_hooks, last_overlay_modification_hooks_used, | |
4241 | overlay); last_overlay_modification_hooks_used++; | |
9115729e KH |
4242 | } |
4243 | \f | |
173f2a64 RS |
4244 | /* Run the modification-hooks of overlays that include |
4245 | any part of the text in START to END. | |
9115729e KH |
4246 | If this change is an insertion, also |
4247 | run the insert-before-hooks of overlay starting at END, | |
930a9140 RS |
4248 | and the insert-after-hooks of overlay ending at START. |
4249 | ||
4250 | This is called both before and after the modification. | |
4251 | AFTER is nonzero when we call after the modification. | |
4252 | ||
9115729e KH |
4253 | ARG1, ARG2, ARG3 are arguments to pass to the hook functions. |
4254 | When AFTER is nonzero, they are the start position, | |
4255 | the position after the inserted new text, | |
4256 | and the length of deleted or replaced old text. */ | |
173f2a64 RS |
4257 | |
4258 | void | |
930a9140 | 4259 | report_overlay_modification (start, end, after, arg1, arg2, arg3) |
173f2a64 | 4260 | Lisp_Object start, end; |
930a9140 RS |
4261 | int after; |
4262 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 | 4263 | { |
2410d73a SM |
4264 | Lisp_Object prop, overlay; |
4265 | struct Lisp_Overlay *tail; | |
9115729e KH |
4266 | /* 1 if this change is an insertion. */ |
4267 | int insertion = (after ? XFASTINT (arg3) == 0 : EQ (start, end)); | |
a615c6dc | 4268 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
55b48893 RS |
4269 | |
4270 | overlay = Qnil; | |
2410d73a | 4271 | tail = NULL; |
9115729e | 4272 | |
27c6b98e SM |
4273 | /* We used to run the functions as soon as we found them and only register |
4274 | them in last_overlay_modification_hooks for the purpose of the `after' | |
4275 | case. But running elisp code as we traverse the list of overlays is | |
4276 | painful because the list can be modified by the elisp code so we had to | |
4277 | copy at several places. We now simply do a read-only traversal that | |
4278 | only collects the functions to run and we run them afterwards. It's | |
4279 | simpler, especially since all the code was already there. -stef */ | |
4280 | ||
a615c6dc | 4281 | if (!after) |
173f2a64 | 4282 | { |
a615c6dc SM |
4283 | /* We are being called before a change. |
4284 | Scan the overlays to find the functions to call. */ | |
4285 | last_overlay_modification_hooks_used = 0; | |
2410d73a | 4286 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
173f2a64 | 4287 | { |
a615c6dc SM |
4288 | int startpos, endpos; |
4289 | Lisp_Object ostart, oend; | |
4290 | ||
2410d73a | 4291 | XSETMISC (overlay, tail); |
a615c6dc SM |
4292 | |
4293 | ostart = OVERLAY_START (overlay); | |
4294 | oend = OVERLAY_END (overlay); | |
4295 | endpos = OVERLAY_POSITION (oend); | |
4296 | if (XFASTINT (start) > endpos) | |
4297 | break; | |
4298 | startpos = OVERLAY_POSITION (ostart); | |
4299 | if (insertion && (XFASTINT (start) == startpos | |
4300 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4301 | { |
a615c6dc SM |
4302 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4303 | if (!NILP (prop)) | |
4304 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4305 | } |
a615c6dc SM |
4306 | if (insertion && (XFASTINT (start) == endpos |
4307 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4308 | { |
a615c6dc SM |
4309 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4310 | if (!NILP (prop)) | |
4311 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4312 | } |
a615c6dc SM |
4313 | /* Test for intersecting intervals. This does the right thing |
4314 | for both insertion and deletion. */ | |
4315 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4316 | { |
a615c6dc SM |
4317 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4318 | if (!NILP (prop)) | |
4319 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4320 | } |
173f2a64 | 4321 | } |
60ebfdf3 | 4322 | |
2410d73a | 4323 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
173f2a64 | 4324 | { |
a615c6dc SM |
4325 | int startpos, endpos; |
4326 | Lisp_Object ostart, oend; | |
4327 | ||
2410d73a | 4328 | XSETMISC (overlay, tail); |
a615c6dc SM |
4329 | |
4330 | ostart = OVERLAY_START (overlay); | |
4331 | oend = OVERLAY_END (overlay); | |
4332 | startpos = OVERLAY_POSITION (ostart); | |
4333 | endpos = OVERLAY_POSITION (oend); | |
4334 | if (XFASTINT (end) < startpos) | |
4335 | break; | |
4336 | if (insertion && (XFASTINT (start) == startpos | |
4337 | || XFASTINT (end) == startpos)) | |
5fb5aa33 | 4338 | { |
a615c6dc SM |
4339 | prop = Foverlay_get (overlay, Qinsert_in_front_hooks); |
4340 | if (!NILP (prop)) | |
4341 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4342 | } |
a615c6dc SM |
4343 | if (insertion && (XFASTINT (start) == endpos |
4344 | || XFASTINT (end) == endpos)) | |
5fb5aa33 | 4345 | { |
a615c6dc SM |
4346 | prop = Foverlay_get (overlay, Qinsert_behind_hooks); |
4347 | if (!NILP (prop)) | |
4348 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4349 | } |
a615c6dc SM |
4350 | /* Test for intersecting intervals. This does the right thing |
4351 | for both insertion and deletion. */ | |
4352 | if (XFASTINT (end) > startpos && XFASTINT (start) < endpos) | |
5fb5aa33 | 4353 | { |
a615c6dc SM |
4354 | prop = Foverlay_get (overlay, Qmodification_hooks); |
4355 | if (!NILP (prop)) | |
4356 | add_overlay_mod_hooklist (prop, overlay); | |
5fb5aa33 | 4357 | } |
173f2a64 RS |
4358 | } |
4359 | } | |
55b48893 | 4360 | |
a615c6dc SM |
4361 | GCPRO4 (overlay, arg1, arg2, arg3); |
4362 | { | |
4363 | /* Call the functions recorded in last_overlay_modification_hooks. | |
4364 | First copy the vector contents, in case some of these hooks | |
4365 | do subsequent modification of the buffer. */ | |
4366 | int size = last_overlay_modification_hooks_used; | |
4367 | Lisp_Object *copy = (Lisp_Object *) alloca (size * sizeof (Lisp_Object)); | |
4368 | int i; | |
4369 | ||
4370 | bcopy (XVECTOR (last_overlay_modification_hooks)->contents, | |
4371 | copy, size * sizeof (Lisp_Object)); | |
4372 | gcpro1.var = copy; | |
4373 | gcpro1.nvars = size; | |
4374 | ||
4375 | for (i = 0; i < size;) | |
4376 | { | |
4377 | Lisp_Object prop, overlay; | |
4378 | prop = copy[i++]; | |
4379 | overlay = copy[i++]; | |
4380 | call_overlay_mod_hooks (prop, overlay, after, arg1, arg2, arg3); | |
4381 | } | |
4382 | } | |
55b48893 | 4383 | UNGCPRO; |
173f2a64 RS |
4384 | } |
4385 | ||
4386 | static void | |
930a9140 RS |
4387 | call_overlay_mod_hooks (list, overlay, after, arg1, arg2, arg3) |
4388 | Lisp_Object list, overlay; | |
4389 | int after; | |
4390 | Lisp_Object arg1, arg2, arg3; | |
173f2a64 | 4391 | { |
930a9140 | 4392 | struct gcpro gcpro1, gcpro2, gcpro3, gcpro4; |
9115729e | 4393 | |
930a9140 | 4394 | GCPRO4 (list, arg1, arg2, arg3); |
9115729e | 4395 | |
6d70a280 | 4396 | while (CONSP (list)) |
173f2a64 | 4397 | { |
930a9140 | 4398 | if (NILP (arg3)) |
6d70a280 | 4399 | call4 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2); |
930a9140 | 4400 | else |
6d70a280 SM |
4401 | call5 (XCAR (list), overlay, after ? Qt : Qnil, arg1, arg2, arg3); |
4402 | list = XCDR (list); | |
173f2a64 RS |
4403 | } |
4404 | UNGCPRO; | |
4405 | } | |
9d7608b7 KH |
4406 | |
4407 | /* Delete any zero-sized overlays at position POS, if the `evaporate' | |
4408 | property is set. */ | |
4409 | void | |
4410 | evaporate_overlays (pos) | |
c2d5b10f | 4411 | EMACS_INT pos; |
9d7608b7 | 4412 | { |
2410d73a SM |
4413 | Lisp_Object overlay, hit_list; |
4414 | struct Lisp_Overlay *tail; | |
9d7608b7 KH |
4415 | |
4416 | hit_list = Qnil; | |
c2d5b10f | 4417 | if (pos <= current_buffer->overlay_center) |
2410d73a | 4418 | for (tail = current_buffer->overlays_before; tail; tail = tail->next) |
9d7608b7 KH |
4419 | { |
4420 | int endpos; | |
2410d73a | 4421 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4422 | endpos = OVERLAY_POSITION (OVERLAY_END (overlay)); |
4423 | if (endpos < pos) | |
4424 | break; | |
4425 | if (endpos == pos && OVERLAY_POSITION (OVERLAY_START (overlay)) == pos | |
c3935f9d | 4426 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4427 | hit_list = Fcons (overlay, hit_list); |
4428 | } | |
4429 | else | |
2410d73a | 4430 | for (tail = current_buffer->overlays_after; tail; tail = tail->next) |
9d7608b7 KH |
4431 | { |
4432 | int startpos; | |
2410d73a | 4433 | XSETMISC (overlay, tail); |
9d7608b7 KH |
4434 | startpos = OVERLAY_POSITION (OVERLAY_START (overlay)); |
4435 | if (startpos > pos) | |
4436 | break; | |
4437 | if (startpos == pos && OVERLAY_POSITION (OVERLAY_END (overlay)) == pos | |
c3935f9d | 4438 | && ! NILP (Foverlay_get (overlay, Qevaporate))) |
9d7608b7 KH |
4439 | hit_list = Fcons (overlay, hit_list); |
4440 | } | |
7539e11f KR |
4441 | for (; CONSP (hit_list); hit_list = XCDR (hit_list)) |
4442 | Fdelete_overlay (XCAR (hit_list)); | |
9d7608b7 | 4443 | } |
173f2a64 | 4444 | \f |
54dfdeb0 | 4445 | /* Somebody has tried to store a value with an unacceptable type |
1bf08baf KH |
4446 | in the slot with offset OFFSET. */ |
4447 | ||
0fa3ba92 | 4448 | void |
64e16c3c SM |
4449 | buffer_slot_type_mismatch (sym, type) |
4450 | Lisp_Object sym; | |
4451 | int type; | |
0fa3ba92 | 4452 | { |
0fa3ba92 | 4453 | char *type_name; |
177c0ea7 | 4454 | |
64e16c3c | 4455 | switch (type) |
0fa3ba92 | 4456 | { |
7c02e886 GM |
4457 | case Lisp_Int: |
4458 | type_name = "integers"; | |
4459 | break; | |
177c0ea7 | 4460 | |
7c02e886 GM |
4461 | case Lisp_String: |
4462 | type_name = "strings"; | |
4463 | break; | |
177c0ea7 | 4464 | |
7c02e886 GM |
4465 | case Lisp_Symbol: |
4466 | type_name = "symbols"; | |
4467 | break; | |
177c0ea7 | 4468 | |
0fa3ba92 JB |
4469 | default: |
4470 | abort (); | |
4471 | } | |
4472 | ||
1bf08baf | 4473 | error ("Only %s should be stored in the buffer-local variable %s", |
d5db4077 | 4474 | type_name, SDATA (SYMBOL_NAME (sym))); |
0fa3ba92 | 4475 | } |
7c02e886 | 4476 | |
0fa3ba92 | 4477 | \f |
b86af064 GM |
4478 | /*********************************************************************** |
4479 | Allocation with mmap | |
4480 | ***********************************************************************/ | |
4481 | ||
4482 | #ifdef USE_MMAP_FOR_BUFFERS | |
4483 | ||
4484 | #include <sys/types.h> | |
4485 | #include <sys/mman.h> | |
4486 | ||
4487 | #ifndef MAP_ANON | |
4488 | #ifdef MAP_ANONYMOUS | |
4489 | #define MAP_ANON MAP_ANONYMOUS | |
4490 | #else | |
4491 | #define MAP_ANON 0 | |
4492 | #endif | |
4493 | #endif | |
4494 | ||
09dfdf85 GM |
4495 | #ifndef MAP_FAILED |
4496 | #define MAP_FAILED ((void *) -1) | |
4497 | #endif | |
4498 | ||
b86af064 GM |
4499 | #include <stdio.h> |
4500 | #include <errno.h> | |
4501 | ||
4502 | #if MAP_ANON == 0 | |
4503 | #include <fcntl.h> | |
4504 | #endif | |
4505 | ||
4506 | #include "coding.h" | |
4507 | ||
4508 | ||
4509 | /* Memory is allocated in regions which are mapped using mmap(2). | |
4510 | The current implementation lets the system select mapped | |
4511 | addresses; we're not using MAP_FIXED in general, except when | |
4512 | trying to enlarge regions. | |
4513 | ||
4514 | Each mapped region starts with a mmap_region structure, the user | |
4515 | area starts after that structure, aligned to MEM_ALIGN. | |
4516 | ||
4517 | +-----------------------+ | |
4518 | | struct mmap_info + | | |
4519 | | padding | | |
4520 | +-----------------------+ | |
4521 | | user data | | |
4522 | | | | |
4523 | | | | |
4524 | +-----------------------+ */ | |
4525 | ||
4526 | struct mmap_region | |
4527 | { | |
4528 | /* User-specified size. */ | |
4529 | size_t nbytes_specified; | |
177c0ea7 | 4530 | |
b86af064 GM |
4531 | /* Number of bytes mapped */ |
4532 | size_t nbytes_mapped; | |
4533 | ||
4534 | /* Pointer to the location holding the address of the memory | |
4535 | allocated with the mmap'd block. The variable actually points | |
4536 | after this structure. */ | |
4537 | POINTER_TYPE **var; | |
4538 | ||
4539 | /* Next and previous in list of all mmap'd regions. */ | |
4540 | struct mmap_region *next, *prev; | |
4541 | }; | |
4542 | ||
4543 | /* Doubly-linked list of mmap'd regions. */ | |
4544 | ||
4545 | static struct mmap_region *mmap_regions; | |
4546 | ||
4547 | /* File descriptor for mmap. If we don't have anonymous mapping, | |
4548 | /dev/zero will be opened on it. */ | |
4549 | ||
4550 | static int mmap_fd; | |
4551 | ||
4552 | /* Temporary storage for mmap_set_vars, see there. */ | |
4553 | ||
4554 | static struct mmap_region *mmap_regions_1; | |
4555 | static int mmap_fd_1; | |
4556 | ||
4557 | /* Page size on this system. */ | |
4558 | ||
4559 | static int mmap_page_size; | |
4560 | ||
4561 | /* 1 means mmap has been intialized. */ | |
4562 | ||
4563 | static int mmap_initialized_p; | |
4564 | ||
4565 | /* Value is X rounded up to the next multiple of N. */ | |
4566 | ||
4567 | #define ROUND(X, N) (((X) + (N) - 1) / (N) * (N)) | |
4568 | ||
4569 | /* Size of mmap_region structure plus padding. */ | |
4570 | ||
4571 | #define MMAP_REGION_STRUCT_SIZE \ | |
4572 | ROUND (sizeof (struct mmap_region), MEM_ALIGN) | |
4573 | ||
4574 | /* Given a pointer P to the start of the user-visible part of a mapped | |
4575 | region, return a pointer to the start of the region. */ | |
4576 | ||
4577 | #define MMAP_REGION(P) \ | |
4578 | ((struct mmap_region *) ((char *) (P) - MMAP_REGION_STRUCT_SIZE)) | |
4579 | ||
4580 | /* Given a pointer P to the start of a mapped region, return a pointer | |
4581 | to the start of the user-visible part of the region. */ | |
4582 | ||
4583 | #define MMAP_USER_AREA(P) \ | |
4584 | ((POINTER_TYPE *) ((char *) (P) + MMAP_REGION_STRUCT_SIZE)) | |
4585 | ||
4586 | #define MEM_ALIGN sizeof (double) | |
4587 | ||
7273faa1 DL |
4588 | /* Predicate returning true if part of the address range [START .. END] |
4589 | is currently mapped. Used to prevent overwriting an existing | |
08327b22 GM |
4590 | memory mapping. |
4591 | ||
4592 | Default is to conservativly assume the address range is occupied by | |
4593 | something else. This can be overridden by system configuration | |
4594 | files if system-specific means to determine this exists. */ | |
4595 | ||
4596 | #ifndef MMAP_ALLOCATED_P | |
4597 | #define MMAP_ALLOCATED_P(start, end) 1 | |
4598 | #endif | |
4599 | ||
b86af064 GM |
4600 | /* Function prototypes. */ |
4601 | ||
4602 | static int mmap_free_1 P_ ((struct mmap_region *)); | |
4603 | static int mmap_enlarge P_ ((struct mmap_region *, int)); | |
4604 | static struct mmap_region *mmap_find P_ ((POINTER_TYPE *, POINTER_TYPE *)); | |
4605 | static POINTER_TYPE *mmap_alloc P_ ((POINTER_TYPE **, size_t)); | |
4606 | static POINTER_TYPE *mmap_realloc P_ ((POINTER_TYPE **, size_t)); | |
4607 | static void mmap_free P_ ((POINTER_TYPE **ptr)); | |
4608 | static void mmap_init P_ ((void)); | |
4609 | ||
4610 | ||
4611 | /* Return a region overlapping address range START...END, or null if | |
4612 | none. END is not including, i.e. the last byte in the range | |
4613 | is at END - 1. */ | |
4614 | ||
4615 | static struct mmap_region * | |
4616 | mmap_find (start, end) | |
4617 | POINTER_TYPE *start, *end; | |
4618 | { | |
4619 | struct mmap_region *r; | |
4620 | char *s = (char *) start, *e = (char *) end; | |
177c0ea7 | 4621 | |
b86af064 GM |
4622 | for (r = mmap_regions; r; r = r->next) |
4623 | { | |
4624 | char *rstart = (char *) r; | |
4625 | char *rend = rstart + r->nbytes_mapped; | |
4626 | ||
4627 | if (/* First byte of range, i.e. START, in this region? */ | |
4628 | (s >= rstart && s < rend) | |
4629 | /* Last byte of range, i.e. END - 1, in this region? */ | |
4630 | || (e > rstart && e <= rend) | |
4631 | /* First byte of this region in the range? */ | |
4632 | || (rstart >= s && rstart < e) | |
4633 | /* Last byte of this region in the range? */ | |
4634 | || (rend > s && rend <= e)) | |
4635 | break; | |
4636 | } | |
4637 | ||
4638 | return r; | |
4639 | } | |
4640 | ||
4641 | ||
4642 | /* Unmap a region. P is a pointer to the start of the user-araa of | |
4643 | the region. Value is non-zero if successful. */ | |
4644 | ||
4645 | static int | |
4646 | mmap_free_1 (r) | |
4647 | struct mmap_region *r; | |
4648 | { | |
4649 | if (r->next) | |
4650 | r->next->prev = r->prev; | |
4651 | if (r->prev) | |
4652 | r->prev->next = r->next; | |
4653 | else | |
4654 | mmap_regions = r->next; | |
177c0ea7 | 4655 | |
1a15cca0 | 4656 | if (munmap ((POINTER_TYPE *) r, r->nbytes_mapped) == -1) |
b86af064 GM |
4657 | { |
4658 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4659 | return 0; | |
4660 | } | |
4661 | ||
4662 | return 1; | |
4663 | } | |
4664 | ||
4665 | ||
4666 | /* Enlarge region R by NPAGES pages. NPAGES < 0 means shrink R. | |
4667 | Value is non-zero if successful. */ | |
4668 | ||
4669 | static int | |
4670 | mmap_enlarge (r, npages) | |
4671 | struct mmap_region *r; | |
4672 | int npages; | |
4673 | { | |
4674 | char *region_end = (char *) r + r->nbytes_mapped; | |
4675 | size_t nbytes; | |
4676 | int success = 0; | |
4677 | ||
4678 | if (npages < 0) | |
4679 | { | |
4680 | /* Unmap pages at the end of the region. */ | |
4681 | nbytes = - npages * mmap_page_size; | |
4682 | if (munmap (region_end - nbytes, nbytes) == -1) | |
4683 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4684 | else | |
4685 | { | |
4686 | r->nbytes_mapped -= nbytes; | |
4687 | success = 1; | |
4688 | } | |
4689 | } | |
4690 | else if (npages > 0) | |
4691 | { | |
b86af064 | 4692 | nbytes = npages * mmap_page_size; |
177c0ea7 | 4693 | |
b86af064 GM |
4694 | /* Try to map additional pages at the end of the region. We |
4695 | cannot do this if the address range is already occupied by | |
4696 | something else because mmap deletes any previous mapping. | |
4697 | I'm not sure this is worth doing, let's see. */ | |
08327b22 | 4698 | if (!MMAP_ALLOCATED_P (region_end, region_end + nbytes)) |
b86af064 GM |
4699 | { |
4700 | POINTER_TYPE *p; | |
177c0ea7 | 4701 | |
b86af064 GM |
4702 | p = mmap (region_end, nbytes, PROT_READ | PROT_WRITE, |
4703 | MAP_ANON | MAP_PRIVATE | MAP_FIXED, mmap_fd, 0); | |
4704 | if (p == MAP_FAILED) | |
edaa9aed | 4705 | ; /* fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); */ |
b86af064 GM |
4706 | else if (p != (POINTER_TYPE *) region_end) |
4707 | { | |
4708 | /* Kernels are free to choose a different address. In | |
4709 | that case, unmap what we've mapped above; we have | |
4710 | no use for it. */ | |
4711 | if (munmap (p, nbytes) == -1) | |
4712 | fprintf (stderr, "munmap: %s\n", emacs_strerror (errno)); | |
4713 | } | |
4714 | else | |
4715 | { | |
4716 | r->nbytes_mapped += nbytes; | |
4717 | success = 1; | |
4718 | } | |
4719 | } | |
4720 | } | |
4721 | ||
4722 | return success; | |
4723 | } | |
4724 | ||
4725 | ||
4726 | /* Set or reset variables holding references to mapped regions. If | |
4727 | RESTORE_P is zero, set all variables to null. If RESTORE_P is | |
4728 | non-zero, set all variables to the start of the user-areas | |
4729 | of mapped regions. | |
4730 | ||
4731 | This function is called from Fdump_emacs to ensure that the dumped | |
4732 | Emacs doesn't contain references to memory that won't be mapped | |
4733 | when Emacs starts. */ | |
4734 | ||
4735 | void | |
4736 | mmap_set_vars (restore_p) | |
4737 | int restore_p; | |
4738 | { | |
4739 | struct mmap_region *r; | |
4740 | ||
4741 | if (restore_p) | |
4742 | { | |
4743 | mmap_regions = mmap_regions_1; | |
4744 | mmap_fd = mmap_fd_1; | |
4745 | for (r = mmap_regions; r; r = r->next) | |
4746 | *r->var = MMAP_USER_AREA (r); | |
4747 | } | |
4748 | else | |
4749 | { | |
4750 | for (r = mmap_regions; r; r = r->next) | |
4751 | *r->var = NULL; | |
4752 | mmap_regions_1 = mmap_regions; | |
4753 | mmap_regions = NULL; | |
4754 | mmap_fd_1 = mmap_fd; | |
4755 | mmap_fd = -1; | |
4756 | } | |
4757 | } | |
4758 | ||
4759 | ||
4760 | /* Allocate a block of storage large enough to hold NBYTES bytes of | |
4761 | data. A pointer to the data is returned in *VAR. VAR is thus the | |
4762 | address of some variable which will use the data area. | |
4763 | ||
4764 | The allocation of 0 bytes is valid. | |
4765 | ||
4766 | If we can't allocate the necessary memory, set *VAR to null, and | |
4767 | return null. */ | |
4768 | ||
4769 | static POINTER_TYPE * | |
4770 | mmap_alloc (var, nbytes) | |
4771 | POINTER_TYPE **var; | |
4772 | size_t nbytes; | |
4773 | { | |
4774 | void *p; | |
4775 | size_t map; | |
4776 | ||
4777 | mmap_init (); | |
4778 | ||
4779 | map = ROUND (nbytes + MMAP_REGION_STRUCT_SIZE, mmap_page_size); | |
4780 | p = mmap (NULL, map, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, | |
4781 | mmap_fd, 0); | |
177c0ea7 | 4782 | |
b86af064 GM |
4783 | if (p == MAP_FAILED) |
4784 | { | |
4785 | if (errno != ENOMEM) | |
4786 | fprintf (stderr, "mmap: %s\n", emacs_strerror (errno)); | |
4787 | p = NULL; | |
4788 | } | |
4789 | else | |
4790 | { | |
4791 | struct mmap_region *r = (struct mmap_region *) p; | |
177c0ea7 | 4792 | |
b86af064 GM |
4793 | r->nbytes_specified = nbytes; |
4794 | r->nbytes_mapped = map; | |
4795 | r->var = var; | |
4796 | r->prev = NULL; | |
4797 | r->next = mmap_regions; | |
4798 | if (r->next) | |
4799 | r->next->prev = r; | |
4800 | mmap_regions = r; | |
177c0ea7 | 4801 | |
b86af064 GM |
4802 | p = MMAP_USER_AREA (p); |
4803 | } | |
177c0ea7 | 4804 | |
b86af064 GM |
4805 | return *var = p; |
4806 | } | |
4807 | ||
4808 | ||
4809 | /* Given a pointer at address VAR to data allocated with mmap_alloc, | |
4810 | resize it to size NBYTES. Change *VAR to reflect the new block, | |
4811 | and return this value. If more memory cannot be allocated, then | |
4812 | leave *VAR unchanged, and return null. */ | |
4813 | ||
4814 | static POINTER_TYPE * | |
4815 | mmap_realloc (var, nbytes) | |
4816 | POINTER_TYPE **var; | |
4817 | size_t nbytes; | |
4818 | { | |
4819 | POINTER_TYPE *result; | |
177c0ea7 | 4820 | |
b86af064 GM |
4821 | mmap_init (); |
4822 | ||
4823 | if (*var == NULL) | |
4824 | result = mmap_alloc (var, nbytes); | |
177c0ea7 | 4825 | else if (nbytes == 0) |
b86af064 GM |
4826 | { |
4827 | mmap_free (var); | |
4828 | result = mmap_alloc (var, nbytes); | |
4829 | } | |
4830 | else | |
4831 | { | |
4832 | struct mmap_region *r = MMAP_REGION (*var); | |
4833 | size_t room = r->nbytes_mapped - MMAP_REGION_STRUCT_SIZE; | |
177c0ea7 | 4834 | |
b86af064 GM |
4835 | if (room < nbytes) |
4836 | { | |
4837 | /* Must enlarge. */ | |
4838 | POINTER_TYPE *old_ptr = *var; | |
4839 | ||
4840 | /* Try to map additional pages at the end of the region. | |
4841 | If that fails, allocate a new region, copy data | |
4842 | from the old region, then free it. */ | |
4843 | if (mmap_enlarge (r, (ROUND (nbytes - room, mmap_page_size) | |
4844 | / mmap_page_size))) | |
4845 | { | |
4846 | r->nbytes_specified = nbytes; | |
4847 | *var = result = old_ptr; | |
4848 | } | |
4849 | else if (mmap_alloc (var, nbytes)) | |
4850 | { | |
4851 | bcopy (old_ptr, *var, r->nbytes_specified); | |
4852 | mmap_free_1 (MMAP_REGION (old_ptr)); | |
4853 | result = *var; | |
4854 | r = MMAP_REGION (result); | |
4855 | r->nbytes_specified = nbytes; | |
4856 | } | |
4857 | else | |
4858 | { | |
4859 | *var = old_ptr; | |
4860 | result = NULL; | |
4861 | } | |
4862 | } | |
4863 | else if (room - nbytes >= mmap_page_size) | |
4864 | { | |
4865 | /* Shrinking by at least a page. Let's give some | |
6bcdeb8c KR |
4866 | memory back to the system. |
4867 | ||
4868 | The extra parens are to make the division happens first, | |
4869 | on positive values, so we know it will round towards | |
4870 | zero. */ | |
bb63c5c9 | 4871 | mmap_enlarge (r, - ((room - nbytes) / mmap_page_size)); |
b86af064 GM |
4872 | result = *var; |
4873 | r->nbytes_specified = nbytes; | |
4874 | } | |
4875 | else | |
4876 | { | |
4877 | /* Leave it alone. */ | |
4878 | result = *var; | |
4879 | r->nbytes_specified = nbytes; | |
4880 | } | |
4881 | } | |
4882 | ||
4883 | return result; | |
4884 | } | |
4885 | ||
4886 | ||
4887 | /* Free a block of relocatable storage whose data is pointed to by | |
4888 | PTR. Store 0 in *PTR to show there's no block allocated. */ | |
4889 | ||
4890 | static void | |
4891 | mmap_free (var) | |
4892 | POINTER_TYPE **var; | |
4893 | { | |
4894 | mmap_init (); | |
177c0ea7 | 4895 | |
b86af064 GM |
4896 | if (*var) |
4897 | { | |
4898 | mmap_free_1 (MMAP_REGION (*var)); | |
4899 | *var = NULL; | |
4900 | } | |
4901 | } | |
4902 | ||
4903 | ||
4904 | /* Perform necessary intializations for the use of mmap. */ | |
4905 | ||
4906 | static void | |
4907 | mmap_init () | |
4908 | { | |
4909 | #if MAP_ANON == 0 | |
4910 | /* The value of mmap_fd is initially 0 in temacs, and -1 | |
4911 | in a dumped Emacs. */ | |
4912 | if (mmap_fd <= 0) | |
4913 | { | |
4914 | /* No anonymous mmap -- we need the file descriptor. */ | |
4915 | mmap_fd = open ("/dev/zero", O_RDONLY); | |
4916 | if (mmap_fd == -1) | |
4917 | fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno)); | |
4918 | } | |
4919 | #endif /* MAP_ANON == 0 */ | |
4920 | ||
4921 | if (mmap_initialized_p) | |
4922 | return; | |
4923 | mmap_initialized_p = 1; | |
177c0ea7 | 4924 | |
b86af064 GM |
4925 | #if MAP_ANON != 0 |
4926 | mmap_fd = -1; | |
4927 | #endif | |
177c0ea7 | 4928 | |
b86af064 GM |
4929 | mmap_page_size = getpagesize (); |
4930 | } | |
4931 | ||
4932 | #endif /* USE_MMAP_FOR_BUFFERS */ | |
4933 | ||
4934 | ||
4935 | \f | |
4936 | /*********************************************************************** | |
4937 | Buffer-text Allocation | |
4938 | ***********************************************************************/ | |
4939 | ||
4940 | #ifdef REL_ALLOC | |
4941 | extern POINTER_TYPE *r_alloc P_ ((POINTER_TYPE **, size_t)); | |
4942 | extern POINTER_TYPE *r_re_alloc P_ ((POINTER_TYPE **, size_t)); | |
4943 | extern void r_alloc_free P_ ((POINTER_TYPE **ptr)); | |
4944 | #endif /* REL_ALLOC */ | |
4945 | ||
4946 | ||
4947 | /* Allocate NBYTES bytes for buffer B's text buffer. */ | |
4948 | ||
4949 | static void | |
4950 | alloc_buffer_text (b, nbytes) | |
4951 | struct buffer *b; | |
4952 | size_t nbytes; | |
4953 | { | |
4954 | POINTER_TYPE *p; | |
177c0ea7 | 4955 | |
b86af064 GM |
4956 | BLOCK_INPUT; |
4957 | #if defined USE_MMAP_FOR_BUFFERS | |
4958 | p = mmap_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4959 | #elif defined REL_ALLOC | |
4960 | p = r_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4961 | #else | |
815add84 | 4962 | p = xmalloc (nbytes); |
b86af064 | 4963 | #endif |
177c0ea7 | 4964 | |
b86af064 GM |
4965 | if (p == NULL) |
4966 | { | |
4967 | UNBLOCK_INPUT; | |
4968 | memory_full (); | |
4969 | } | |
4970 | ||
4971 | b->text->beg = (unsigned char *) p; | |
4972 | UNBLOCK_INPUT; | |
4973 | } | |
4974 | ||
4975 | /* Enlarge buffer B's text buffer by DELTA bytes. DELTA < 0 means | |
4976 | shrink it. */ | |
4977 | ||
4978 | void | |
4979 | enlarge_buffer_text (b, delta) | |
4980 | struct buffer *b; | |
4981 | int delta; | |
4982 | { | |
4983 | POINTER_TYPE *p; | |
4984 | size_t nbytes = (BUF_Z_BYTE (b) - BUF_BEG_BYTE (b) + BUF_GAP_SIZE (b) + 1 | |
4985 | + delta); | |
4986 | BLOCK_INPUT; | |
4987 | #if defined USE_MMAP_FOR_BUFFERS | |
4988 | p = mmap_realloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4989 | #elif defined REL_ALLOC | |
4990 | p = r_re_alloc ((POINTER_TYPE **) &b->text->beg, nbytes); | |
4991 | #else | |
4992 | p = xrealloc (b->text->beg, nbytes); | |
4993 | #endif | |
177c0ea7 | 4994 | |
b86af064 GM |
4995 | if (p == NULL) |
4996 | { | |
4997 | UNBLOCK_INPUT; | |
4998 | memory_full (); | |
4999 | } | |
5000 | ||
5001 | BUF_BEG_ADDR (b) = (unsigned char *) p; | |
5002 | UNBLOCK_INPUT; | |
5003 | } | |
5004 | ||
5005 | ||
5006 | /* Free buffer B's text buffer. */ | |
5007 | ||
5008 | static void | |
5009 | free_buffer_text (b) | |
5010 | struct buffer *b; | |
5011 | { | |
5012 | BLOCK_INPUT; | |
5013 | ||
5014 | #if defined USE_MMAP_FOR_BUFFERS | |
5015 | mmap_free ((POINTER_TYPE **) &b->text->beg); | |
5016 | #elif defined REL_ALLOC | |
5017 | r_alloc_free ((POINTER_TYPE **) &b->text->beg); | |
5018 | #else | |
5019 | xfree (b->text->beg); | |
5020 | #endif | |
177c0ea7 | 5021 | |
b86af064 GM |
5022 | BUF_BEG_ADDR (b) = NULL; |
5023 | UNBLOCK_INPUT; | |
5024 | } | |
5025 | ||
5026 | ||
5027 | \f | |
5028 | /*********************************************************************** | |
5029 | Initialization | |
5030 | ***********************************************************************/ | |
5031 | ||
dfcf069d | 5032 | void |
1ab256cb RM |
5033 | init_buffer_once () |
5034 | { | |
7c02e886 GM |
5035 | int idx; |
5036 | ||
5037 | bzero (buffer_permanent_local_flags, sizeof buffer_permanent_local_flags); | |
13de9290 | 5038 | |
1ab256cb RM |
5039 | /* Make sure all markable slots in buffer_defaults |
5040 | are initialized reasonably, so mark_buffer won't choke. */ | |
5041 | reset_buffer (&buffer_defaults); | |
13de9290 | 5042 | reset_buffer_local_variables (&buffer_defaults, 1); |
1ab256cb | 5043 | reset_buffer (&buffer_local_symbols); |
13de9290 | 5044 | reset_buffer_local_variables (&buffer_local_symbols, 1); |
336cd056 RS |
5045 | /* Prevent GC from getting confused. */ |
5046 | buffer_defaults.text = &buffer_defaults.own_text; | |
5047 | buffer_local_symbols.text = &buffer_local_symbols.own_text; | |
336cd056 RS |
5048 | BUF_INTERVALS (&buffer_defaults) = 0; |
5049 | BUF_INTERVALS (&buffer_local_symbols) = 0; | |
cf00e751 | 5050 | XSETPVECTYPE (&buffer_defaults, PVEC_BUFFER); |
67180c6a | 5051 | XSETBUFFER (Vbuffer_defaults, &buffer_defaults); |
cf00e751 | 5052 | XSETPVECTYPE (&buffer_local_symbols, PVEC_BUFFER); |
67180c6a | 5053 | XSETBUFFER (Vbuffer_local_symbols, &buffer_local_symbols); |
1ab256cb RM |
5054 | |
5055 | /* Set up the default values of various buffer slots. */ | |
5056 | /* Must do these before making the first buffer! */ | |
5057 | ||
f532dca0 | 5058 | /* real setup is done in bindings.el */ |
1ab256cb | 5059 | buffer_defaults.mode_line_format = build_string ("%-"); |
045dee35 | 5060 | buffer_defaults.header_line_format = Qnil; |
1ab256cb RM |
5061 | buffer_defaults.abbrev_mode = Qnil; |
5062 | buffer_defaults.overwrite_mode = Qnil; | |
5063 | buffer_defaults.case_fold_search = Qt; | |
5064 | buffer_defaults.auto_fill_function = Qnil; | |
5065 | buffer_defaults.selective_display = Qnil; | |
5066 | #ifndef old | |
5067 | buffer_defaults.selective_display_ellipses = Qt; | |
5068 | #endif | |
5069 | buffer_defaults.abbrev_table = Qnil; | |
5070 | buffer_defaults.display_table = Qnil; | |
1ab256cb | 5071 | buffer_defaults.undo_list = Qnil; |
c48f61ef | 5072 | buffer_defaults.mark_active = Qnil; |
be9aafdd | 5073 | buffer_defaults.file_format = Qnil; |
71ed49fa | 5074 | buffer_defaults.auto_save_file_format = Qt; |
2410d73a SM |
5075 | buffer_defaults.overlays_before = NULL; |
5076 | buffer_defaults.overlays_after = NULL; | |
c2d5b10f | 5077 | buffer_defaults.overlay_center = BEG; |
1ab256cb | 5078 | |
8d7a4592 | 5079 | XSETFASTINT (buffer_defaults.tab_width, 8); |
1ab256cb RM |
5080 | buffer_defaults.truncate_lines = Qnil; |
5081 | buffer_defaults.ctl_arrow = Qt; | |
3b06f880 | 5082 | buffer_defaults.direction_reversed = Qnil; |
bb2ec976 | 5083 | buffer_defaults.cursor_type = Qt; |
a3bbced0 | 5084 | buffer_defaults.extra_line_spacing = Qnil; |
187ccf49 | 5085 | buffer_defaults.cursor_in_non_selected_windows = Qt; |
1ab256cb | 5086 | |
f7975d07 | 5087 | #ifdef DOS_NT |
0776cb1b | 5088 | buffer_defaults.buffer_file_type = Qnil; /* TEXT */ |
54ad07d3 | 5089 | #endif |
a1a17b61 | 5090 | buffer_defaults.enable_multibyte_characters = Qt; |
c71b5d9b | 5091 | buffer_defaults.buffer_file_coding_system = Qnil; |
8d7a4592 KH |
5092 | XSETFASTINT (buffer_defaults.fill_column, 70); |
5093 | XSETFASTINT (buffer_defaults.left_margin, 0); | |
28e969dd | 5094 | buffer_defaults.cache_long_line_scans = Qnil; |
f6ed2e84 | 5095 | buffer_defaults.file_truename = Qnil; |
7962a441 | 5096 | XSETFASTINT (buffer_defaults.display_count, 0); |
2ad8731a KS |
5097 | XSETFASTINT (buffer_defaults.left_margin_cols, 0); |
5098 | XSETFASTINT (buffer_defaults.right_margin_cols, 0); | |
5099 | buffer_defaults.left_fringe_width = Qnil; | |
5100 | buffer_defaults.right_fringe_width = Qnil; | |
5101 | buffer_defaults.fringes_outside_margins = Qnil; | |
5102 | buffer_defaults.scroll_bar_width = Qnil; | |
5103 | buffer_defaults.vertical_scroll_bar_type = Qt; | |
0552666b | 5104 | buffer_defaults.indicate_empty_lines = Qnil; |
6b61353c | 5105 | buffer_defaults.indicate_buffer_boundaries = Qnil; |
c6a46372 KS |
5106 | buffer_defaults.fringe_indicator_alist = Qnil; |
5107 | buffer_defaults.fringe_cursor_alist = Qnil; | |
0552666b GM |
5108 | buffer_defaults.scroll_up_aggressively = Qnil; |
5109 | buffer_defaults.scroll_down_aggressively = Qnil; | |
3fd364db | 5110 | buffer_defaults.display_time = Qnil; |
1ab256cb RM |
5111 | |
5112 | /* Assign the local-flags to the slots that have default values. | |
5113 | The local flag is a bit that is used in the buffer | |
5114 | to say that it has its own local value for the slot. | |
5115 | The local flag bits are in the local_var_flags slot of the buffer. */ | |
5116 | ||
5117 | /* Nothing can work if this isn't true */ | |
4d2f1389 | 5118 | if (sizeof (EMACS_INT) != sizeof (Lisp_Object)) abort (); |
1ab256cb RM |
5119 | |
5120 | /* 0 means not a lisp var, -1 means always local, else mask */ | |
5121 | bzero (&buffer_local_flags, sizeof buffer_local_flags); | |
aab80822 KH |
5122 | XSETINT (buffer_local_flags.filename, -1); |
5123 | XSETINT (buffer_local_flags.directory, -1); | |
5124 | XSETINT (buffer_local_flags.backed_up, -1); | |
5125 | XSETINT (buffer_local_flags.save_length, -1); | |
5126 | XSETINT (buffer_local_flags.auto_save_file_name, -1); | |
5127 | XSETINT (buffer_local_flags.read_only, -1); | |
5128 | XSETINT (buffer_local_flags.major_mode, -1); | |
5129 | XSETINT (buffer_local_flags.mode_name, -1); | |
5130 | XSETINT (buffer_local_flags.undo_list, -1); | |
5131 | XSETINT (buffer_local_flags.mark_active, -1); | |
943e065b | 5132 | XSETINT (buffer_local_flags.point_before_scroll, -1); |
f6ed2e84 | 5133 | XSETINT (buffer_local_flags.file_truename, -1); |
3cb719bd | 5134 | XSETINT (buffer_local_flags.invisibility_spec, -1); |
55ac8536 | 5135 | XSETINT (buffer_local_flags.file_format, -1); |
71ed49fa | 5136 | XSETINT (buffer_local_flags.auto_save_file_format, -1); |
7962a441 | 5137 | XSETINT (buffer_local_flags.display_count, -1); |
3fd364db | 5138 | XSETINT (buffer_local_flags.display_time, -1); |
1bf08baf | 5139 | XSETINT (buffer_local_flags.enable_multibyte_characters, -1); |
8d7a4592 | 5140 | |
7c02e886 GM |
5141 | idx = 1; |
5142 | XSETFASTINT (buffer_local_flags.mode_line_format, idx); ++idx; | |
5143 | XSETFASTINT (buffer_local_flags.abbrev_mode, idx); ++idx; | |
5144 | XSETFASTINT (buffer_local_flags.overwrite_mode, idx); ++idx; | |
5145 | XSETFASTINT (buffer_local_flags.case_fold_search, idx); ++idx; | |
5146 | XSETFASTINT (buffer_local_flags.auto_fill_function, idx); ++idx; | |
5147 | XSETFASTINT (buffer_local_flags.selective_display, idx); ++idx; | |
1ab256cb | 5148 | #ifndef old |
7c02e886 | 5149 | XSETFASTINT (buffer_local_flags.selective_display_ellipses, idx); ++idx; |
1ab256cb | 5150 | #endif |
7c02e886 GM |
5151 | XSETFASTINT (buffer_local_flags.tab_width, idx); ++idx; |
5152 | XSETFASTINT (buffer_local_flags.truncate_lines, idx); ++idx; | |
5153 | XSETFASTINT (buffer_local_flags.ctl_arrow, idx); ++idx; | |
5154 | XSETFASTINT (buffer_local_flags.fill_column, idx); ++idx; | |
5155 | XSETFASTINT (buffer_local_flags.left_margin, idx); ++idx; | |
5156 | XSETFASTINT (buffer_local_flags.abbrev_table, idx); ++idx; | |
5157 | XSETFASTINT (buffer_local_flags.display_table, idx); ++idx; | |
f7975d07 | 5158 | #ifdef DOS_NT |
7c02e886 | 5159 | XSETFASTINT (buffer_local_flags.buffer_file_type, idx); |
13de9290 | 5160 | /* Make this one a permanent local. */ |
7c02e886 | 5161 | buffer_permanent_local_flags[idx++] = 1; |
54ad07d3 | 5162 | #endif |
7c02e886 GM |
5163 | XSETFASTINT (buffer_local_flags.syntax_table, idx); ++idx; |
5164 | XSETFASTINT (buffer_local_flags.cache_long_line_scans, idx); ++idx; | |
5165 | XSETFASTINT (buffer_local_flags.category_table, idx); ++idx; | |
5166 | XSETFASTINT (buffer_local_flags.direction_reversed, idx); ++idx; | |
177c0ea7 | 5167 | XSETFASTINT (buffer_local_flags.buffer_file_coding_system, idx); |
a1a17b61 | 5168 | /* Make this one a permanent local. */ |
7c02e886 | 5169 | buffer_permanent_local_flags[idx++] = 1; |
2ad8731a KS |
5170 | XSETFASTINT (buffer_local_flags.left_margin_cols, idx); ++idx; |
5171 | XSETFASTINT (buffer_local_flags.right_margin_cols, idx); ++idx; | |
5172 | XSETFASTINT (buffer_local_flags.left_fringe_width, idx); ++idx; | |
5173 | XSETFASTINT (buffer_local_flags.right_fringe_width, idx); ++idx; | |
5174 | XSETFASTINT (buffer_local_flags.fringes_outside_margins, idx); ++idx; | |
5175 | XSETFASTINT (buffer_local_flags.scroll_bar_width, idx); ++idx; | |
5176 | XSETFASTINT (buffer_local_flags.vertical_scroll_bar_type, idx); ++idx; | |
7c02e886 | 5177 | XSETFASTINT (buffer_local_flags.indicate_empty_lines, idx); ++idx; |
6b61353c | 5178 | XSETFASTINT (buffer_local_flags.indicate_buffer_boundaries, idx); ++idx; |
c6a46372 KS |
5179 | XSETFASTINT (buffer_local_flags.fringe_indicator_alist, idx); ++idx; |
5180 | XSETFASTINT (buffer_local_flags.fringe_cursor_alist, idx); ++idx; | |
7c02e886 GM |
5181 | XSETFASTINT (buffer_local_flags.scroll_up_aggressively, idx); ++idx; |
5182 | XSETFASTINT (buffer_local_flags.scroll_down_aggressively, idx); ++idx; | |
5183 | XSETFASTINT (buffer_local_flags.header_line_format, idx); ++idx; | |
bd96bd79 | 5184 | XSETFASTINT (buffer_local_flags.cursor_type, idx); ++idx; |
a3bbced0 | 5185 | XSETFASTINT (buffer_local_flags.extra_line_spacing, idx); ++idx; |
0124c5bd | 5186 | XSETFASTINT (buffer_local_flags.cursor_in_non_selected_windows, idx); ++idx; |
7c02e886 GM |
5187 | |
5188 | /* Need more room? */ | |
7313acd0 | 5189 | if (idx >= MAX_PER_BUFFER_VARS) |
7c02e886 | 5190 | abort (); |
7313acd0 | 5191 | last_per_buffer_idx = idx; |
177c0ea7 | 5192 | |
1ab256cb RM |
5193 | Vbuffer_alist = Qnil; |
5194 | current_buffer = 0; | |
5195 | all_buffers = 0; | |
5196 | ||
5197 | QSFundamental = build_string ("Fundamental"); | |
5198 | ||
5199 | Qfundamental_mode = intern ("fundamental-mode"); | |
5200 | buffer_defaults.major_mode = Qfundamental_mode; | |
5201 | ||
5202 | Qmode_class = intern ("mode-class"); | |
5203 | ||
5204 | Qprotected_field = intern ("protected-field"); | |
5205 | ||
5206 | Qpermanent_local = intern ("permanent-local"); | |
5207 | ||
5208 | Qkill_buffer_hook = intern ("kill-buffer-hook"); | |
fd6cfe11 | 5209 | Fput (Qkill_buffer_hook, Qpermanent_local, Qt); |
1ab256cb | 5210 | |
48265e61 DL |
5211 | Qucs_set_table_for_input = intern ("ucs-set-table-for-input"); |
5212 | ||
1ab256cb | 5213 | Vprin1_to_string_buffer = Fget_buffer_create (build_string (" prin1")); |
000f8083 | 5214 | |
1ab256cb RM |
5215 | /* super-magic invisible buffer */ |
5216 | Vbuffer_alist = Qnil; | |
5217 | ||
ffd56f97 | 5218 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
7775635d KH |
5219 | |
5220 | inhibit_modification_hooks = 0; | |
1ab256cb RM |
5221 | } |
5222 | ||
dfcf069d | 5223 | void |
1ab256cb RM |
5224 | init_buffer () |
5225 | { | |
2381d133 | 5226 | char *pwd; |
136351b7 | 5227 | Lisp_Object temp; |
b639c9be | 5228 | int len; |
1ab256cb | 5229 | |
b86af064 | 5230 | #ifdef USE_MMAP_FOR_BUFFERS |
93c27ef1 GM |
5231 | { |
5232 | /* When using the ralloc implementation based on mmap(2), buffer | |
5233 | text pointers will have been set to null in the dumped Emacs. | |
5234 | Map new memory. */ | |
5235 | struct buffer *b; | |
177c0ea7 | 5236 | |
93c27ef1 GM |
5237 | for (b = all_buffers; b; b = b->next) |
5238 | if (b->text->beg == NULL) | |
b86af064 | 5239 | enlarge_buffer_text (b, 0); |
93c27ef1 | 5240 | } |
b86af064 | 5241 | #endif /* USE_MMAP_FOR_BUFFERS */ |
177c0ea7 | 5242 | |
1ab256cb | 5243 | Fset_buffer (Fget_buffer_create (build_string ("*scratch*"))); |
3d871c85 RS |
5244 | if (NILP (buffer_defaults.enable_multibyte_characters)) |
5245 | Fset_buffer_multibyte (Qnil); | |
2381d133 | 5246 | |
01537133 | 5247 | pwd = get_current_dir_name (); |
a17b5ed1 | 5248 | |
156bdb41 | 5249 | if (!pwd) |
a17b5ed1 | 5250 | fatal ("`get_current_dir_name' failed: %s\n", strerror (errno)); |
1ab256cb RM |
5251 | |
5252 | #ifndef VMS | |
5253 | /* Maybe this should really use some standard subroutine | |
5254 | whose definition is filename syntax dependent. */ | |
b639c9be RF |
5255 | len = strlen (pwd); |
5256 | if (!(IS_DIRECTORY_SEP (pwd[len - 1]))) | |
f7975d07 | 5257 | { |
156bdb41 | 5258 | /* Grow buffer to add directory separator and '\0'. */ |
b639c9be RF |
5259 | pwd = (char *) xrealloc (pwd, len + 2); |
5260 | pwd[len] = DIRECTORY_SEP; | |
5261 | pwd[len + 1] = '\0'; | |
f7975d07 | 5262 | } |
1ab256cb | 5263 | #endif /* not VMS */ |
0995fa35 | 5264 | |
01537133 | 5265 | current_buffer->directory = make_unibyte_string (pwd, strlen (pwd)); |
dcd74c5f | 5266 | if (! NILP (buffer_defaults.enable_multibyte_characters)) |
f9962371 | 5267 | /* At this moment, we still don't know how to decode the |
156bdb41 | 5268 | directory name. So, we keep the bytes in multibyte form so |
dcd74c5f KH |
5269 | that ENCODE_FILE correctly gets the original bytes. */ |
5270 | current_buffer->directory | |
5271 | = string_to_multibyte (current_buffer->directory); | |
136351b7 | 5272 | |
0995fa35 RS |
5273 | /* Add /: to the front of the name |
5274 | if it would otherwise be treated as magic. */ | |
5275 | temp = Ffind_file_name_handler (current_buffer->directory, Qt); | |
81ab2e07 KH |
5276 | if (! NILP (temp) |
5277 | /* If the default dir is just /, TEMP is non-nil | |
5278 | because of the ange-ftp completion handler. | |
5279 | However, it is not necessary to turn / into /:/. | |
5280 | So avoid doing that. */ | |
d5db4077 | 5281 | && strcmp ("/", SDATA (current_buffer->directory))) |
0995fa35 RS |
5282 | current_buffer->directory |
5283 | = concat2 (build_string ("/:"), current_buffer->directory); | |
5284 | ||
136351b7 RS |
5285 | temp = get_minibuffer (0); |
5286 | XBUFFER (temp)->directory = current_buffer->directory; | |
01537133 EZ |
5287 | |
5288 | free (pwd); | |
1ab256cb RM |
5289 | } |
5290 | ||
d6aa1876 SM |
5291 | /* Similar to defvar_lisp but define a variable whose value is the Lisp |
5292 | Object stored in the current buffer. address is the address of the slot | |
5293 | in the buffer that is current now. */ | |
5294 | ||
5295 | /* TYPE is nil for a general Lisp variable. | |
5296 | An integer specifies a type; then only LIsp values | |
5297 | with that type code are allowed (except that nil is allowed too). | |
5298 | LNAME is the LIsp-level variable name. | |
5299 | VNAME is the name of the buffer slot. | |
5300 | DOC is a dummy where you write the doc string as a comment. */ | |
5301 | #define DEFVAR_PER_BUFFER(lname, vname, type, doc) \ | |
5302 | defvar_per_buffer (lname, vname, type, 0) | |
5303 | ||
5304 | static void | |
5305 | defvar_per_buffer (namestring, address, type, doc) | |
5306 | char *namestring; | |
5307 | Lisp_Object *address; | |
5308 | Lisp_Object type; | |
5309 | char *doc; | |
5310 | { | |
5311 | Lisp_Object sym, val; | |
5312 | int offset; | |
5313 | ||
5314 | sym = intern (namestring); | |
5315 | val = allocate_misc (); | |
5316 | offset = (char *)address - (char *)current_buffer; | |
5317 | ||
5318 | XMISCTYPE (val) = Lisp_Misc_Buffer_Objfwd; | |
5319 | XBUFFER_OBJFWD (val)->offset = offset; | |
64e16c3c | 5320 | XBUFFER_OBJFWD (val)->slottype = type; |
d6aa1876 SM |
5321 | SET_SYMBOL_VALUE (sym, val); |
5322 | PER_BUFFER_SYMBOL (offset) = sym; | |
d6aa1876 SM |
5323 | |
5324 | if (PER_BUFFER_IDX (offset) == 0) | |
5325 | /* Did a DEFVAR_PER_BUFFER without initializing the corresponding | |
5326 | slot of buffer_local_flags */ | |
5327 | abort (); | |
5328 | } | |
5329 | ||
5330 | ||
1ab256cb | 5331 | /* initialize the buffer routines */ |
dfcf069d | 5332 | void |
1ab256cb RM |
5333 | syms_of_buffer () |
5334 | { | |
9115729e KH |
5335 | staticpro (&last_overlay_modification_hooks); |
5336 | last_overlay_modification_hooks | |
5337 | = Fmake_vector (make_number (10), Qnil); | |
5338 | ||
1ab256cb RM |
5339 | staticpro (&Vbuffer_defaults); |
5340 | staticpro (&Vbuffer_local_symbols); | |
5341 | staticpro (&Qfundamental_mode); | |
5342 | staticpro (&Qmode_class); | |
5343 | staticpro (&QSFundamental); | |
5344 | staticpro (&Vbuffer_alist); | |
5345 | staticpro (&Qprotected_field); | |
5346 | staticpro (&Qpermanent_local); | |
2f7a359d RS |
5347 | Qpermanent_local_hook = intern ("permanent-local-hook"); |
5348 | staticpro (&Qpermanent_local_hook); | |
1ab256cb | 5349 | staticpro (&Qkill_buffer_hook); |
22378665 | 5350 | Qoverlayp = intern ("overlayp"); |
52f8ec73 | 5351 | staticpro (&Qoverlayp); |
9d7608b7 KH |
5352 | Qevaporate = intern ("evaporate"); |
5353 | staticpro (&Qevaporate); | |
294d215f | 5354 | Qmodification_hooks = intern ("modification-hooks"); |
22378665 | 5355 | staticpro (&Qmodification_hooks); |
294d215f | 5356 | Qinsert_in_front_hooks = intern ("insert-in-front-hooks"); |
22378665 | 5357 | staticpro (&Qinsert_in_front_hooks); |
294d215f | 5358 | Qinsert_behind_hooks = intern ("insert-behind-hooks"); |
22378665 | 5359 | staticpro (&Qinsert_behind_hooks); |
5fe0b67e | 5360 | Qget_file_buffer = intern ("get-file-buffer"); |
22378665 | 5361 | staticpro (&Qget_file_buffer); |
5985d248 KH |
5362 | Qpriority = intern ("priority"); |
5363 | staticpro (&Qpriority); | |
5364 | Qwindow = intern ("window"); | |
5365 | staticpro (&Qwindow); | |
bbbe9545 KH |
5366 | Qbefore_string = intern ("before-string"); |
5367 | staticpro (&Qbefore_string); | |
5368 | Qafter_string = intern ("after-string"); | |
5369 | staticpro (&Qafter_string); | |
22378665 RS |
5370 | Qfirst_change_hook = intern ("first-change-hook"); |
5371 | staticpro (&Qfirst_change_hook); | |
5372 | Qbefore_change_functions = intern ("before-change-functions"); | |
5373 | staticpro (&Qbefore_change_functions); | |
5374 | Qafter_change_functions = intern ("after-change-functions"); | |
5375 | staticpro (&Qafter_change_functions); | |
2f7a359d | 5376 | /* The next one is initialized in init_buffer_once. */ |
48265e61 | 5377 | staticpro (&Qucs_set_table_for_input); |
1ab256cb | 5378 | |
5b20caf0 RS |
5379 | Qkill_buffer_query_functions = intern ("kill-buffer-query-functions"); |
5380 | staticpro (&Qkill_buffer_query_functions); | |
5381 | ||
1ab256cb RM |
5382 | Fput (Qprotected_field, Qerror_conditions, |
5383 | Fcons (Qprotected_field, Fcons (Qerror, Qnil))); | |
5384 | Fput (Qprotected_field, Qerror_message, | |
5385 | build_string ("Attempt to modify a protected field")); | |
5386 | ||
5387 | /* All these use DEFVAR_LISP_NOPRO because the slots in | |
5388 | buffer_defaults will all be marked via Vbuffer_defaults. */ | |
5389 | ||
5390 | DEFVAR_LISP_NOPRO ("default-mode-line-format", | |
7ee72033 MB |
5391 | &buffer_defaults.mode_line_format, |
5392 | doc: /* Default value of `mode-line-format' for buffers that don't override it. | |
018ba359 | 5393 | This is the same as (default-value 'mode-line-format). */); |
1ab256cb | 5394 | |
045dee35 | 5395 | DEFVAR_LISP_NOPRO ("default-header-line-format", |
7ee72033 MB |
5396 | &buffer_defaults.header_line_format, |
5397 | doc: /* Default value of `header-line-format' for buffers that don't override it. | |
018ba359 | 5398 | This is the same as (default-value 'header-line-format). */); |
0552666b | 5399 | |
7ee72033 MB |
5400 | DEFVAR_LISP_NOPRO ("default-cursor-type", &buffer_defaults.cursor_type, |
5401 | doc: /* Default value of `cursor-type' for buffers that don't override it. | |
018ba359 | 5402 | This is the same as (default-value 'cursor-type). */); |
bd96bd79 | 5403 | |
a3bbced0 | 5404 | DEFVAR_LISP_NOPRO ("default-line-spacing", |
7ee72033 MB |
5405 | &buffer_defaults.extra_line_spacing, |
5406 | doc: /* Default value of `line-spacing' for buffers that don't override it. | |
018ba359 | 5407 | This is the same as (default-value 'line-spacing). */); |
a3bbced0 | 5408 | |
187ccf49 KS |
5409 | DEFVAR_LISP_NOPRO ("default-cursor-in-non-selected-windows", |
5410 | &buffer_defaults.cursor_in_non_selected_windows, | |
5411 | doc: /* Default value of `cursor-in-non-selected-windows'. | |
5412 | This is the same as (default-value 'cursor-in-non-selected-windows). */); | |
5413 | ||
1ab256cb | 5414 | DEFVAR_LISP_NOPRO ("default-abbrev-mode", |
efc7e75f | 5415 | &buffer_defaults.abbrev_mode, |
7ee72033 | 5416 | doc: /* Default value of `abbrev-mode' for buffers that do not override it. |
018ba359 | 5417 | This is the same as (default-value 'abbrev-mode). */); |
1ab256cb RM |
5418 | |
5419 | DEFVAR_LISP_NOPRO ("default-ctl-arrow", | |
efc7e75f | 5420 | &buffer_defaults.ctl_arrow, |
7ee72033 | 5421 | doc: /* Default value of `ctl-arrow' for buffers that do not override it. |
018ba359 | 5422 | This is the same as (default-value 'ctl-arrow). */); |
1ab256cb | 5423 | |
5e2ad10b JB |
5424 | DEFVAR_LISP_NOPRO ("default-direction-reversed", |
5425 | &buffer_defaults.direction_reversed, | |
5426 | doc: /* Default value of `direction-reversed' for buffers that do not override it. | |
018ba359 | 5427 | This is the same as (default-value 'direction-reversed). */); |
177c0ea7 | 5428 | |
5e2ad10b JB |
5429 | DEFVAR_LISP_NOPRO ("default-enable-multibyte-characters", |
5430 | &buffer_defaults.enable_multibyte_characters, | |
5431 | doc: /* *Default value of `enable-multibyte-characters' for buffers not overriding it. | |
018ba359 | 5432 | This is the same as (default-value 'enable-multibyte-characters). */); |
177c0ea7 | 5433 | |
5e2ad10b JB |
5434 | DEFVAR_LISP_NOPRO ("default-buffer-file-coding-system", |
5435 | &buffer_defaults.buffer_file_coding_system, | |
5436 | doc: /* Default value of `buffer-file-coding-system' for buffers not overriding it. | |
018ba359 | 5437 | This is the same as (default-value 'buffer-file-coding-system). */); |
177c0ea7 | 5438 | |
1ab256cb | 5439 | DEFVAR_LISP_NOPRO ("default-truncate-lines", |
efc7e75f PJ |
5440 | &buffer_defaults.truncate_lines, |
5441 | doc: /* Default value of `truncate-lines' for buffers that do not override it. | |
018ba359 | 5442 | This is the same as (default-value 'truncate-lines). */); |
1ab256cb RM |
5443 | |
5444 | DEFVAR_LISP_NOPRO ("default-fill-column", | |
efc7e75f PJ |
5445 | &buffer_defaults.fill_column, |
5446 | doc: /* Default value of `fill-column' for buffers that do not override it. | |
018ba359 | 5447 | This is the same as (default-value 'fill-column). */); |
1ab256cb RM |
5448 | |
5449 | DEFVAR_LISP_NOPRO ("default-left-margin", | |
efc7e75f PJ |
5450 | &buffer_defaults.left_margin, |
5451 | doc: /* Default value of `left-margin' for buffers that do not override it. | |
018ba359 | 5452 | This is the same as (default-value 'left-margin). */); |
1ab256cb RM |
5453 | |
5454 | DEFVAR_LISP_NOPRO ("default-tab-width", | |
bc0ede35 | 5455 | &buffer_defaults.tab_width, |
23625946 | 5456 | doc: /* Default value of `tab-width' for buffers that do not override it. |
018ba359 | 5457 | This is the same as (default-value 'tab-width). */); |
1ab256cb RM |
5458 | |
5459 | DEFVAR_LISP_NOPRO ("default-case-fold-search", | |
efc7e75f PJ |
5460 | &buffer_defaults.case_fold_search, |
5461 | doc: /* Default value of `case-fold-search' for buffers that don't override it. | |
018ba359 | 5462 | This is the same as (default-value 'case-fold-search). */); |
1ab256cb | 5463 | |
f7975d07 | 5464 | #ifdef DOS_NT |
177c0ea7 | 5465 | DEFVAR_LISP_NOPRO ("default-buffer-file-type", |
7ee72033 | 5466 | &buffer_defaults.buffer_file_type, |
efc7e75f | 5467 | doc: /* Default file type for buffers that do not override it. |
018ba359 PJ |
5468 | This is the same as (default-value 'buffer-file-type). |
5469 | The file type is nil for text, t for binary. */); | |
54ad07d3 RS |
5470 | #endif |
5471 | ||
0552666b | 5472 | DEFVAR_LISP_NOPRO ("default-left-margin-width", |
2ad8731a | 5473 | &buffer_defaults.left_margin_cols, |
efc7e75f | 5474 | doc: /* Default value of `left-margin-width' for buffers that don't override it. |
018ba359 | 5475 | This is the same as (default-value 'left-margin-width). */); |
0552666b GM |
5476 | |
5477 | DEFVAR_LISP_NOPRO ("default-right-margin-width", | |
2ad8731a KS |
5478 | &buffer_defaults.right_margin_cols, |
5479 | doc: /* Default value of `right-margin-width' for buffers that don't override it. | |
018ba359 | 5480 | This is the same as (default-value 'right-margin-width). */); |
177c0ea7 | 5481 | |
2ad8731a KS |
5482 | DEFVAR_LISP_NOPRO ("default-left-fringe-width", |
5483 | &buffer_defaults.left_fringe_width, | |
5484 | doc: /* Default value of `left-fringe-width' for buffers that don't override it. | |
5485 | This is the same as (default-value 'left-fringe-width). */); | |
5486 | ||
5487 | DEFVAR_LISP_NOPRO ("default-right-fringe-width", | |
5488 | &buffer_defaults.right_fringe_width, | |
5489 | doc: /* Default value of `right-fringe-width' for buffers that don't override it. | |
5490 | This is the same as (default-value 'right-fringe-width). */); | |
5491 | ||
5492 | DEFVAR_LISP_NOPRO ("default-fringes-outside-margins", | |
5493 | &buffer_defaults.fringes_outside_margins, | |
5494 | doc: /* Default value of `fringes-outside-margins' for buffers that don't override it. | |
5495 | This is the same as (default-value 'fringes-outside-margins). */); | |
5496 | ||
5497 | DEFVAR_LISP_NOPRO ("default-scroll-bar-width", | |
5498 | &buffer_defaults.scroll_bar_width, | |
5499 | doc: /* Default value of `scroll-bar-width' for buffers that don't override it. | |
5500 | This is the same as (default-value 'scroll-bar-width). */); | |
5501 | ||
5502 | DEFVAR_LISP_NOPRO ("default-vertical-scroll-bar", | |
5503 | &buffer_defaults.vertical_scroll_bar_type, | |
5504 | doc: /* Default value of `vertical-scroll-bar' for buffers that don't override it. | |
5505 | This is the same as (default-value 'vertical-scroll-bar). */); | |
5506 | ||
0552666b | 5507 | DEFVAR_LISP_NOPRO ("default-indicate-empty-lines", |
efc7e75f PJ |
5508 | &buffer_defaults.indicate_empty_lines, |
5509 | doc: /* Default value of `indicate-empty-lines' for buffers that don't override it. | |
018ba359 | 5510 | This is the same as (default-value 'indicate-empty-lines). */); |
177c0ea7 | 5511 | |
6b61353c KH |
5512 | DEFVAR_LISP_NOPRO ("default-indicate-buffer-boundaries", |
5513 | &buffer_defaults.indicate_buffer_boundaries, | |
5514 | doc: /* Default value of `indicate-buffer-boundaries' for buffers that don't override it. | |
5515 | This is the same as (default-value 'indicate-buffer-boundaries). */); | |
5516 | ||
c6a46372 KS |
5517 | DEFVAR_LISP_NOPRO ("default-fringe-indicator-alist", |
5518 | &buffer_defaults.fringe_indicator_alist, | |
5519 | doc: /* Default value of `fringe-indicator-alist' for buffers that don't override it. | |
5520 | This is the same as (default-value 'fringe-indicator-alist'). */); | |
5521 | ||
5522 | DEFVAR_LISP_NOPRO ("default-fringe-cursor-alist", | |
5523 | &buffer_defaults.fringe_cursor_alist, | |
5524 | doc: /* Default value of `fringe-cursor-alist' for buffers that don't override it. | |
5525 | This is the same as (default-value 'fringe-cursor-alist'). */); | |
5526 | ||
0552666b | 5527 | DEFVAR_LISP_NOPRO ("default-scroll-up-aggressively", |
efc7e75f | 5528 | &buffer_defaults.scroll_up_aggressively, |
7614d762 RS |
5529 | doc: /* Default value of `scroll-up-aggressively'. |
5530 | This value applies in buffers that don't have their own local values. | |
fc961256 | 5531 | This is the same as (default-value 'scroll-up-aggressively). */); |
177c0ea7 | 5532 | |
0552666b | 5533 | DEFVAR_LISP_NOPRO ("default-scroll-down-aggressively", |
efc7e75f | 5534 | &buffer_defaults.scroll_down_aggressively, |
7614d762 RS |
5535 | doc: /* Default value of `scroll-down-aggressively'. |
5536 | This value applies in buffers that don't have their own local values. | |
fc961256 | 5537 | This is the same as (default-value 'scroll-down-aggressively). */); |
177c0ea7 | 5538 | |
045dee35 | 5539 | DEFVAR_PER_BUFFER ("header-line-format", |
018ba359 | 5540 | ¤t_buffer->header_line_format, |
7ee72033 | 5541 | Qnil, |
7614d762 RS |
5542 | doc: /* Analogous to `mode-line-format', but controls the header line. |
5543 | The header line appears, optionally, at the top of a window; | |
5544 | the mode line appears at the bottom. */); | |
177c0ea7 | 5545 | |
1ab256cb | 5546 | DEFVAR_PER_BUFFER ("mode-line-format", ¤t_buffer->mode_line_format, |
efc7e75f PJ |
5547 | Qnil, |
5548 | doc: /* Template for displaying mode line for current buffer. | |
018ba359 PJ |
5549 | Each buffer has its own value of this variable. |
5550 | Value may be nil, a string, a symbol or a list or cons cell. | |
5551 | A value of nil means don't display a mode line. | |
5552 | For a symbol, its value is used (but it is ignored if t or nil). | |
5553 | A string appearing directly as the value of a symbol is processed verbatim | |
5554 | in that the %-constructs below are not recognized. | |
ed463255 | 5555 | Note that unless the symbol is marked as a `risky-local-variable', all |
177c0ea7 | 5556 | properties in any strings, as well as all :eval and :propertize forms |
ed463255 | 5557 | in the value of that symbol will be ignored. |
018ba359 | 5558 | For a list of the form `(:eval FORM)', FORM is evaluated and the result |
9c3eecf3 RS |
5559 | is used as a mode line element. Be careful--FORM should not load any files, |
5560 | because that can cause an infinite recursion. | |
ed463255 KS |
5561 | For a list of the form `(:propertize ELT PROPS...)', ELT is displayed |
5562 | with the specified properties PROPS applied. | |
018ba359 PJ |
5563 | For a list whose car is a symbol, the symbol's value is taken, |
5564 | and if that is non-nil, the cadr of the list is processed recursively. | |
5565 | Otherwise, the caddr of the list (if there is one) is processed. | |
5566 | For a list whose car is a string or list, each element is processed | |
5567 | recursively and the results are effectively concatenated. | |
5568 | For a list whose car is an integer, the cdr of the list is processed | |
5569 | and padded (if the number is positive) or truncated (if negative) | |
5570 | to the width specified by that number. | |
5571 | A string is printed verbatim in the mode line except for %-constructs: | |
5572 | (%-constructs are allowed when the string is the entire mode-line-format | |
5573 | or when it is found in a cons-cell or a list) | |
5574 | %b -- print buffer name. %f -- print visited file name. | |
5575 | %F -- print frame name. | |
5576 | %* -- print %, * or hyphen. %+ -- print *, % or hyphen. | |
5577 | %& is like %*, but ignore read-only-ness. | |
5578 | % means buffer is read-only and * means it is modified. | |
5579 | For a modified read-only buffer, %* gives % and %+ gives *. | |
5580 | %s -- print process status. %l -- print the current line number. | |
5581 | %c -- print the current column number (this makes editing slower). | |
5582 | To make the column number update correctly in all cases, | |
5583 | `column-number-mode' must be non-nil. | |
6b61353c KH |
5584 | %i -- print the size of the buffer. |
5585 | %I -- like %i, but use k, M, G, etc., to abbreviate. | |
018ba359 PJ |
5586 | %p -- print percent of buffer above top of window, or Top, Bot or All. |
5587 | %P -- print percent of buffer above bottom of window, perhaps plus Top, | |
5588 | or print Bottom or All. | |
018ba359 | 5589 | %n -- print Narrow if appropriate. |
dafbe726 | 5590 | %t -- visited file is text or binary (if OS supports this distinction). |
47419860 | 5591 | %z -- print mnemonics of keyboard, terminal, and buffer coding systems. |
018ba359 | 5592 | %Z -- like %z, but including the end-of-line format. |
dafbe726 | 5593 | %e -- print error message about full memory. |
f7165034 NR |
5594 | %@ -- print @ or hyphen. @ means that default-directory is on a |
5595 | remote machine. | |
018ba359 PJ |
5596 | %[ -- print one [ for each recursive editing level. %] similar. |
5597 | %% -- print %. %- -- print infinitely many dashes. | |
5598 | Decimal digits after the % specify field width to which to pad. */); | |
5599 | ||
7ee72033 | 5600 | DEFVAR_LISP_NOPRO ("default-major-mode", &buffer_defaults.major_mode, |
efc7e75f | 5601 | doc: /* *Major mode for new buffers. Defaults to `fundamental-mode'. |
0493af6f JB |
5602 | A value of nil means use current buffer's major mode, |
5603 | provided it is not marked as "special". | |
557ca2c1 RS |
5604 | |
5605 | When a mode is used by default, `find-file' switches to it | |
5606 | before it reads the contents into the buffer and before | |
5607 | it finishes setting up the buffer. Thus, the mode and | |
5608 | its hooks should not expect certain variables such as | |
5609 | `buffer-read-only' and `buffer-file-coding-system' to be set up. */); | |
1ab256cb RM |
5610 | |
5611 | DEFVAR_PER_BUFFER ("major-mode", ¤t_buffer->major_mode, | |
7ee72033 | 5612 | make_number (Lisp_Symbol), |
efc7e75f | 5613 | doc: /* Symbol for current buffer's major mode. */); |
1ab256cb RM |
5614 | |
5615 | DEFVAR_PER_BUFFER ("mode-name", ¤t_buffer->mode_name, | |
c01d0677 | 5616 | Qnil, |
64a7c220 | 5617 | doc: /* Pretty name of current buffer's major mode. |
d224e8c2 GM |
5618 | Usually a string. See `mode-line-format' for other possible forms. |
5619 | Use the function `format-mode-line' to get the value as a string. */); | |
1ab256cb | 5620 | |
d6aa1876 SM |
5621 | DEFVAR_PER_BUFFER ("local-abbrev-table", ¤t_buffer->abbrev_table, Qnil, |
5622 | doc: /* Local (mode-specific) abbrev table of current buffer. */); | |
5623 | ||
7ee72033 | 5624 | DEFVAR_PER_BUFFER ("abbrev-mode", ¤t_buffer->abbrev_mode, Qnil, |
efc7e75f | 5625 | doc: /* Non-nil turns on automatic expansion of abbrevs as they are inserted. */); |
1ab256cb RM |
5626 | |
5627 | DEFVAR_PER_BUFFER ("case-fold-search", ¤t_buffer->case_fold_search, | |
7ee72033 | 5628 | Qnil, |
efc7e75f | 5629 | doc: /* *Non-nil if searches and matches should ignore case. */); |
1ab256cb RM |
5630 | |
5631 | DEFVAR_PER_BUFFER ("fill-column", ¤t_buffer->fill_column, | |
7ee72033 | 5632 | make_number (Lisp_Int), |
1ac5826d | 5633 | doc: /* *Column beyond which automatic line-wrapping should happen. |
f1ccb329 | 5634 | Interactively, you can set the buffer local value using \\[set-fill-column]. */); |
1ab256cb RM |
5635 | |
5636 | DEFVAR_PER_BUFFER ("left-margin", ¤t_buffer->left_margin, | |
7ee72033 | 5637 | make_number (Lisp_Int), |
fc961256 | 5638 | doc: /* *Column for the default `indent-line-function' to indent to. |
018ba359 | 5639 | Linefeed indents to this column in Fundamental mode. */); |
1ab256cb RM |
5640 | |
5641 | DEFVAR_PER_BUFFER ("tab-width", ¤t_buffer->tab_width, | |
7ee72033 | 5642 | make_number (Lisp_Int), |
efc7e75f | 5643 | doc: /* *Distance between tab stops (for display of tab characters), in columns. */); |
1ab256cb | 5644 | |
7ee72033 | 5645 | DEFVAR_PER_BUFFER ("ctl-arrow", ¤t_buffer->ctl_arrow, Qnil, |
efc7e75f | 5646 | doc: /* *Non-nil means display control chars with uparrow. |
018ba359 PJ |
5647 | A value of nil means use backslash and octal digits. |
5648 | This variable does not apply to characters whose display is specified | |
5649 | in the current display table (if there is one). */); | |
1ab256cb | 5650 | |
3b06f880 | 5651 | DEFVAR_PER_BUFFER ("enable-multibyte-characters", |
1bf08baf | 5652 | ¤t_buffer->enable_multibyte_characters, |
a9b9a780 | 5653 | Qnil, |
efc7e75f | 5654 | doc: /* Non-nil means the buffer contents are regarded as multi-byte characters. |
018ba359 PJ |
5655 | Otherwise they are regarded as unibyte. This affects the display, |
5656 | file I/O and the behavior of various editing commands. | |
5657 | ||
5658 | This variable is buffer-local but you cannot set it directly; | |
5659 | use the function `set-buffer-multibyte' to change a buffer's representation. | |
5660 | Changing its default value with `setq-default' is supported. | |
5661 | See also variable `default-enable-multibyte-characters' and Info node | |
5662 | `(elisp)Text Representations'. */); | |
a9b9a780 | 5663 | XSYMBOL (intern ("enable-multibyte-characters"))->constant = 1; |
3b06f880 | 5664 | |
c71b5d9b | 5665 | DEFVAR_PER_BUFFER ("buffer-file-coding-system", |
7ee72033 | 5666 | ¤t_buffer->buffer_file_coding_system, Qnil, |
efc7e75f | 5667 | doc: /* Coding system to be used for encoding the buffer contents on saving. |
018ba359 PJ |
5668 | This variable applies to saving the buffer, and also to `write-region' |
5669 | and other functions that use `write-region'. | |
5670 | It does not apply to sending output to subprocesses, however. | |
5671 | ||
5672 | If this is nil, the buffer is saved without any code conversion | |
5673 | unless some coding system is specified in `file-coding-system-alist' | |
5674 | for the buffer file. | |
5675 | ||
31a6cb06 EZ |
5676 | If the text to be saved cannot be encoded as specified by this variable, |
5677 | an alternative encoding is selected by `select-safe-coding-system', which see. | |
5678 | ||
018ba359 PJ |
5679 | The variable `coding-system-for-write', if non-nil, overrides this variable. |
5680 | ||
5681 | This variable is never applied to a way of decoding a file while reading it. */); | |
c71b5d9b | 5682 | |
3b06f880 | 5683 | DEFVAR_PER_BUFFER ("direction-reversed", ¤t_buffer->direction_reversed, |
7ee72033 | 5684 | Qnil, |
efc7e75f | 5685 | doc: /* *Non-nil means lines in the buffer are displayed right to left. */); |
3b06f880 | 5686 | |
7ee72033 | 5687 | DEFVAR_PER_BUFFER ("truncate-lines", ¤t_buffer->truncate_lines, Qnil, |
7614d762 RS |
5688 | doc: /* *Non-nil means do not display continuation lines. |
5689 | Instead, give each line of text just one screen line. | |
018ba359 PJ |
5690 | |
5691 | Note that this is overridden by the variable | |
5692 | `truncate-partial-width-windows' if that variable is non-nil | |
5693 | and this buffer is not full-frame width. */); | |
1ab256cb | 5694 | |
f7975d07 | 5695 | #ifdef DOS_NT |
54ad07d3 | 5696 | DEFVAR_PER_BUFFER ("buffer-file-type", ¤t_buffer->buffer_file_type, |
7ee72033 | 5697 | Qnil, |
efc7e75f | 5698 | doc: /* Non-nil if the visited file is a binary file. |
018ba359 PJ |
5699 | This variable is meaningful on MS-DOG and Windows NT. |
5700 | On those systems, it is automatically local in every buffer. | |
5701 | On other systems, this variable is normally always nil. */); | |
54ad07d3 RS |
5702 | #endif |
5703 | ||
1ab256cb | 5704 | DEFVAR_PER_BUFFER ("default-directory", ¤t_buffer->directory, |
7ee72033 | 5705 | make_number (Lisp_String), |
efc7e75f | 5706 | doc: /* Name of default directory of current buffer. Should end with slash. |
018ba359 | 5707 | To interactively change the default directory, use command `cd'. */); |
1ab256cb RM |
5708 | |
5709 | DEFVAR_PER_BUFFER ("auto-fill-function", ¤t_buffer->auto_fill_function, | |
7ee72033 | 5710 | Qnil, |
efc7e75f | 5711 | doc: /* Function called (if non-nil) to perform auto-fill. |
018ba359 PJ |
5712 | It is called after self-inserting any character specified in |
5713 | the `auto-fill-chars' table. | |
5714 | NOTE: This variable is not a hook; | |
5715 | its value may not be a list of functions. */); | |
1ab256cb RM |
5716 | |
5717 | DEFVAR_PER_BUFFER ("buffer-file-name", ¤t_buffer->filename, | |
7ee72033 | 5718 | make_number (Lisp_String), |
efc7e75f | 5719 | doc: /* Name of file visited in current buffer, or nil if not visiting a file. */); |
1ab256cb | 5720 | |
f6ed2e84 | 5721 | DEFVAR_PER_BUFFER ("buffer-file-truename", ¤t_buffer->file_truename, |
7ee72033 | 5722 | make_number (Lisp_String), |
efc7e75f | 5723 | doc: /* Abbreviated truename of file visited in current buffer, or nil if none. |
018ba359 PJ |
5724 | The truename of a file is calculated by `file-truename' |
5725 | and then abbreviated with `abbreviate-file-name'. */); | |
f6ed2e84 | 5726 | |
1ab256cb | 5727 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-name", |
3f5fcd47 | 5728 | ¤t_buffer->auto_save_file_name, |
7ee72033 | 5729 | make_number (Lisp_String), |
7614d762 RS |
5730 | doc: /* Name of file for auto-saving current buffer. |
5731 | If it is nil, that means don't auto-save this buffer. */); | |
1ab256cb | 5732 | |
7ee72033 | 5733 | DEFVAR_PER_BUFFER ("buffer-read-only", ¤t_buffer->read_only, Qnil, |
efc7e75f | 5734 | doc: /* Non-nil if this buffer is read-only. */); |
1ab256cb | 5735 | |
7ee72033 | 5736 | DEFVAR_PER_BUFFER ("buffer-backed-up", ¤t_buffer->backed_up, Qnil, |
efc7e75f | 5737 | doc: /* Non-nil if this buffer's file has been backed up. |
018ba359 | 5738 | Backing up is done before the first time the file is saved. */); |
1ab256cb RM |
5739 | |
5740 | DEFVAR_PER_BUFFER ("buffer-saved-size", ¤t_buffer->save_length, | |
7ee72033 | 5741 | make_number (Lisp_Int), |
efc7e75f | 5742 | doc: /* Length of current buffer when last read in, saved or auto-saved. |
018ba359 | 5743 | 0 initially. */); |
1ab256cb RM |
5744 | |
5745 | DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer->selective_display, | |
7ee72033 | 5746 | Qnil, |
7614d762 | 5747 | doc: /* Non-nil enables selective display. |
a66f285a JB |
5748 | An integer N as value means display only lines |
5749 | that start with less than N columns of space. | |
7614d762 RS |
5750 | A value of t means that the character ^M makes itself and |
5751 | all the rest of the line invisible; also, when saving the buffer | |
5752 | in a file, save the ^M as a newline. */); | |
1ab256cb RM |
5753 | |
5754 | #ifndef old | |
5755 | DEFVAR_PER_BUFFER ("selective-display-ellipses", | |
5756 | ¤t_buffer->selective_display_ellipses, | |
7ee72033 | 5757 | Qnil, |
3f676284 | 5758 | doc: /* Non-nil means display ... on previous line when a line is invisible. */); |
1ab256cb RM |
5759 | #endif |
5760 | ||
7ee72033 | 5761 | DEFVAR_PER_BUFFER ("overwrite-mode", ¤t_buffer->overwrite_mode, Qnil, |
efc7e75f | 5762 | doc: /* Non-nil if self-insertion should replace existing text. |
018ba359 PJ |
5763 | The value should be one of `overwrite-mode-textual', |
5764 | `overwrite-mode-binary', or nil. | |
5765 | If it is `overwrite-mode-textual', self-insertion still | |
5766 | inserts at the end of a line, and inserts when point is before a tab, | |
5767 | until the tab is filled in. | |
5768 | If `overwrite-mode-binary', self-insertion replaces newlines and tabs too. */); | |
5769 | ||
54939090 | 5770 | DEFVAR_PER_BUFFER ("buffer-display-table", ¤t_buffer->display_table, |
7ee72033 | 5771 | Qnil, |
efc7e75f | 5772 | doc: /* Display table that controls display of the contents of current buffer. |
018ba359 PJ |
5773 | |
5774 | If this variable is nil, the value of `standard-display-table' is used. | |
5775 | Each window can have its own, overriding display table, see | |
5776 | `set-window-display-table' and `window-display-table'. | |
5777 | ||
5778 | The display table is a char-table created with `make-display-table'. | |
5779 | A char-table is an array indexed by character codes. Normal array | |
5780 | primitives `aref' and `aset' can be used to access elements of a char-table. | |
5781 | ||
5782 | Each of the char-table elements control how to display the corresponding | |
5783 | text character: the element at index C in the table says how to display | |
5784 | the character whose code is C. Each element should be a vector of | |
426a9163 JB |
5785 | characters or nil. The value nil means display the character in the |
5786 | default fashion; otherwise, the characters from the vector are delivered | |
5787 | to the screen instead of the original character. | |
018ba359 | 5788 | |
5fd11dc8 | 5789 | For example, (aset buffer-display-table ?X [?Y]) tells Emacs |
adbb3b05 | 5790 | to display a capital Y instead of each X character. |
018ba359 PJ |
5791 | |
5792 | In addition, a char-table has six extra slots to control the display of: | |
5793 | ||
5794 | the end of a truncated screen line (extra-slot 0, a single character); | |
5795 | the end of a continued line (extra-slot 1, a single character); | |
5796 | the escape character used to display character codes in octal | |
5797 | (extra-slot 2, a single character); | |
5798 | the character used as an arrow for control characters (extra-slot 3, | |
5799 | a single character); | |
5800 | the decoration indicating the presence of invisible lines (extra-slot 4, | |
5801 | a vector of characters); | |
5802 | the character used to draw the border between side-by-side windows | |
5803 | (extra-slot 5, a single character). | |
5804 | ||
5805 | See also the functions `display-table-slot' and `set-display-table-slot'. */); | |
1ab256cb | 5806 | |
2ad8731a | 5807 | DEFVAR_PER_BUFFER ("left-margin-width", ¤t_buffer->left_margin_cols, |
7ee72033 | 5808 | Qnil, |
efc7e75f | 5809 | doc: /* *Width of left marginal area for display of a buffer. |
018ba359 | 5810 | A value of nil means no marginal area. */); |
177c0ea7 | 5811 | |
2ad8731a | 5812 | DEFVAR_PER_BUFFER ("right-margin-width", ¤t_buffer->right_margin_cols, |
7ee72033 | 5813 | Qnil, |
efc7e75f | 5814 | doc: /* *Width of right marginal area for display of a buffer. |
018ba359 | 5815 | A value of nil means no marginal area. */); |
177c0ea7 | 5816 | |
2ad8731a KS |
5817 | DEFVAR_PER_BUFFER ("left-fringe-width", ¤t_buffer->left_fringe_width, |
5818 | Qnil, | |
5819 | doc: /* *Width of this buffer's left fringe (in pixels). | |
5820 | A value of 0 means no left fringe is shown in this buffer's window. | |
5821 | A value of nil means to use the left fringe width from the window's frame. */); | |
5822 | ||
5823 | DEFVAR_PER_BUFFER ("right-fringe-width", ¤t_buffer->right_fringe_width, | |
5824 | Qnil, | |
5825 | doc: /* *Width of this buffer's right fringe (in pixels). | |
5826 | A value of 0 means no right fringe is shown in this buffer's window. | |
5827 | A value of nil means to use the right fringe width from the window's frame. */); | |
5828 | ||
5829 | DEFVAR_PER_BUFFER ("fringes-outside-margins", ¤t_buffer->fringes_outside_margins, | |
5830 | Qnil, | |
5831 | doc: /* *Non-nil means to display fringes outside display margins. | |
5832 | A value of nil means to display fringes between margins and buffer text. */); | |
5833 | ||
5834 | DEFVAR_PER_BUFFER ("scroll-bar-width", ¤t_buffer->scroll_bar_width, | |
5835 | Qnil, | |
5836 | doc: /* *Width of this buffer's scroll bars in pixels. | |
5837 | A value of nil means to use the scroll bar width from the window's frame. */); | |
5838 | ||
5839 | DEFVAR_PER_BUFFER ("vertical-scroll-bar", ¤t_buffer->vertical_scroll_bar_type, | |
5840 | Qnil, | |
5841 | doc: /* *Position of this buffer's vertical scroll bar. | |
7c6b2007 | 5842 | The value takes effect whenever you tell a window to display this buffer; |
188577ce | 5843 | for instance, with `set-window-buffer' or when `display-buffer' displays it. |
7c6b2007 | 5844 | |
fc2c8887 RS |
5845 | A value of `left' or `right' means put the vertical scroll bar at that side |
5846 | of the window; a value of nil means don't show any vertical scroll bars. | |
5847 | A value of t (the default) means do whatever the window's frame specifies. */); | |
2ad8731a | 5848 | |
0552666b | 5849 | DEFVAR_PER_BUFFER ("indicate-empty-lines", |
7ee72033 | 5850 | ¤t_buffer->indicate_empty_lines, Qnil, |
efc7e75f | 5851 | doc: /* *Visually indicate empty lines after the buffer end. |
018ba359 PJ |
5852 | If non-nil, a bitmap is displayed in the left fringe of a window on |
5853 | window-systems. */); | |
177c0ea7 | 5854 | |
6b61353c KH |
5855 | DEFVAR_PER_BUFFER ("indicate-buffer-boundaries", |
5856 | ¤t_buffer->indicate_buffer_boundaries, Qnil, | |
5857 | doc: /* *Visually indicate buffer boundaries and scrolling. | |
5858 | If non-nil, the first and last line of the buffer are marked in the fringe | |
5859 | of a window on window-systems with angle bitmaps, or if the window can be | |
5860 | scrolled, the top and bottom line of the window are marked with up and down | |
5861 | arrow bitmaps. | |
b2229037 KS |
5862 | |
5863 | If value is a symbol `left' or `right', both angle and arrow bitmaps | |
79e3497d | 5864 | are displayed in the left or right fringe, resp. Any other value |
845a78b4 | 5865 | that doesn't look like an alist means display the angle bitmaps in |
79e3497d | 5866 | the left fringe but no arrows. |
b2229037 | 5867 | |
79e3497d RS |
5868 | You can exercise more precise control by using an alist as the |
5869 | value. Each alist element (INDICATOR . POSITION) specifies | |
5870 | where to show one of the indicators. INDICATOR is one of `top', | |
b2229037 KS |
5871 | `bottom', `up', `down', or t, which specifies the default position, |
5872 | and POSITION is one of `left', `right', or nil, meaning do not show | |
5873 | this indicator. | |
5874 | ||
5875 | For example, ((top . left) (t . right)) places the top angle bitmap in | |
5876 | left fringe, the bottom angle bitmap in right fringe, and both arrow | |
6b61353c | 5877 | bitmaps in right fringe. To show just the angle bitmaps in the left |
b2229037 | 5878 | fringe, but no arrow bitmaps, use ((top . left) (bottom . left)). */); |
6b61353c | 5879 | |
c6a46372 KS |
5880 | DEFVAR_PER_BUFFER ("fringe-indicator-alist", |
5881 | ¤t_buffer->fringe_indicator_alist, Qnil, | |
5882 | doc: /* *Mapping from logical to physical fringe indicator bitmaps. | |
5883 | The value is an alist where each element (INDICATOR . BITMAPS) | |
5884 | specifies the fringe bitmaps used to display a specific logical | |
5885 | fringe indicator. | |
5886 | ||
5887 | INDICATOR specifies the logical indicator type which is one of the | |
5888 | following symbols: `truncation' , `continuation', `overlay-arrow', | |
5889 | `top', `bottom', `up', `down', `one-line', `empty-line', or `unknown'. | |
5890 | ||
5891 | BITMAPS is list of symbols (LEFT RIGHT [LEFT1 RIGHT1]) which specifies | |
5892 | the actual bitmap shown in the left or right fringe for the logical | |
5893 | indicator. LEFT and RIGHT are the bitmaps shown in the left and/or | |
5894 | right fringe for the specific indicator. The LEFT1 or RIGHT1 bitmaps | |
5895 | are used only for the `bottom' and `one-line' indicators when the last | |
63af6055 | 5896 | \(only) line in has no final newline. BITMAPS may also be a single |
c6a46372 KS |
5897 | symbol which is used in both left and right fringes. */); |
5898 | ||
5899 | DEFVAR_PER_BUFFER ("fringe-cursor-alist", | |
5900 | ¤t_buffer->fringe_cursor_alist, Qnil, | |
5901 | doc: /* *Mapping from logical to physical fringe cursor bitmaps. | |
5902 | The value is an alist where each element (CURSOR . BITMAP) | |
5903 | specifies the fringe bitmaps used to display a specific logical | |
5904 | cursor type in the fringe. | |
5905 | ||
5906 | CURSOR specifies the logical cursor type which is one of the following | |
5907 | symbols: `box' , `hollow', `bar', `hbar', or `hollow-small'. The last | |
5908 | one is used to show a hollow cursor on narrow lines display lines | |
5909 | where the normal hollow cursor will not fit. | |
5910 | ||
5911 | BITMAP is the corresponding fringe bitmap shown for the logical | |
5912 | cursor type. */); | |
5913 | ||
0552666b | 5914 | DEFVAR_PER_BUFFER ("scroll-up-aggressively", |
7ee72033 | 5915 | ¤t_buffer->scroll_up_aggressively, Qnil, |
4e0692c1 RS |
5916 | doc: /* How far to scroll windows upward. |
5917 | If you move point off the bottom, the window scrolls automatically. | |
426a9163 | 5918 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
5919 | means scroll to center point. A fraction means scroll to put point |
5920 | that fraction of the window's height from the bottom of the window. | |
5921 | When the value is 0.0, point goes at the bottom line, which in the simple | |
5922 | case that you moved off with C-f means scrolling just one line. 1.0 means | |
5923 | point goes at the top, so that in that simple case, the window | |
e5f95d5c | 5924 | scrolls by a full window height. Meaningful values are |
175e9712 | 5925 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 5926 | |
0552666b | 5927 | DEFVAR_PER_BUFFER ("scroll-down-aggressively", |
7ee72033 | 5928 | ¤t_buffer->scroll_down_aggressively, Qnil, |
4e0692c1 RS |
5929 | doc: /* How far to scroll windows downward. |
5930 | If you move point off the top, the window scrolls automatically. | |
426a9163 | 5931 | This variable controls how far it scrolls. The value nil, the default, |
4e0692c1 RS |
5932 | means scroll to center point. A fraction means scroll to put point |
5933 | that fraction of the window's height from the top of the window. | |
5934 | When the value is 0.0, point goes at the top line, which in the simple | |
5935 | case that you moved off with C-b means scrolling just one line. 1.0 means | |
5936 | point goes at the bottom, so that in that simple case, the window | |
e5f95d5c | 5937 | scrolls by a full window height. Meaningful values are |
175e9712 | 5938 | between 0.0 and 1.0, inclusive. */); |
177c0ea7 | 5939 | |
1ab256cb RM |
5940 | /*DEFVAR_LISP ("debug-check-symbol", &Vcheck_symbol, |
5941 | "Don't ask."); | |
5942 | */ | |
1ab256cb | 5943 | |
7ee72033 MB |
5944 | DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions, |
5945 | doc: /* List of functions to call before each text change. | |
018ba359 PJ |
5946 | Two arguments are passed to each function: the positions of |
5947 | the beginning and end of the range of old text to be changed. | |
5948 | \(For an insertion, the beginning and end are at the same place.) | |
5949 | No information is given about the length of the text after the change. | |
5950 | ||
5951 | Buffer changes made while executing the `before-change-functions' | |
5952 | don't call any before-change or after-change functions. | |
5953 | That's because these variables are temporarily set to nil. | |
5954 | As a result, a hook function cannot straightforwardly alter the value of | |
5955 | these variables. See the Emacs Lisp manual for a way of | |
5956 | accomplishing an equivalent result by using other variables. | |
5957 | ||
5958 | If an unhandled error happens in running these functions, | |
5959 | the variable's value remains nil. That prevents the error | |
5960 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
5961 | Vbefore_change_functions = Qnil; |
5962 | ||
7ee72033 | 5963 | DEFVAR_LISP ("after-change-functions", &Vafter_change_functions, |
eacdfade | 5964 | doc: /* List of functions to call after each text change. |
018ba359 PJ |
5965 | Three arguments are passed to each function: the positions of |
5966 | the beginning and end of the range of changed text, | |
5967 | and the length in bytes of the pre-change text replaced by that range. | |
5968 | \(For an insertion, the pre-change length is zero; | |
5969 | for a deletion, that length is the number of bytes deleted, | |
5970 | and the post-change beginning and end are at the same place.) | |
5971 | ||
5972 | Buffer changes made while executing the `after-change-functions' | |
5973 | don't call any before-change or after-change functions. | |
5974 | That's because these variables are temporarily set to nil. | |
5975 | As a result, a hook function cannot straightforwardly alter the value of | |
5976 | these variables. See the Emacs Lisp manual for a way of | |
5977 | accomplishing an equivalent result by using other variables. | |
5978 | ||
5979 | If an unhandled error happens in running these functions, | |
5980 | the variable's value remains nil. That prevents the error | |
5981 | from happening repeatedly and making Emacs nonfunctional. */); | |
5f079267 RS |
5982 | Vafter_change_functions = Qnil; |
5983 | ||
7ee72033 | 5984 | DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook, |
efc7e75f | 5985 | doc: /* A list of functions to call before changing a buffer which is unmodified. |
018ba359 | 5986 | The functions are run using the `run-hooks' function. */); |
dbc4e1c1 | 5987 | Vfirst_change_hook = Qnil; |
1ab256cb | 5988 | |
7ee72033 MB |
5989 | DEFVAR_PER_BUFFER ("buffer-undo-list", ¤t_buffer->undo_list, Qnil, |
5990 | doc: /* List of undo entries in current buffer. | |
018ba359 PJ |
5991 | Recent changes come first; older changes follow newer. |
5992 | ||
5993 | An entry (BEG . END) represents an insertion which begins at | |
5994 | position BEG and ends at position END. | |
5995 | ||
5996 | An entry (TEXT . POSITION) represents the deletion of the string TEXT | |
5997 | from (abs POSITION). If POSITION is positive, point was at the front | |
5998 | of the text being deleted; if negative, point was at the end. | |
5999 | ||
6000 | An entry (t HIGH . LOW) indicates that the buffer previously had | |
6001 | \"unmodified\" status. HIGH and LOW are the high and low 16-bit portions | |
6002 | of the visited file's modification time, as of that time. If the | |
6003 | modification time of the most recent save is different, this entry is | |
6004 | obsolete. | |
6005 | ||
6006 | An entry (nil PROPERTY VALUE BEG . END) indicates that a text property | |
6007 | was modified between BEG and END. PROPERTY is the property name, | |
6008 | and VALUE is the old value. | |
6009 | ||
7405f386 KS |
6010 | An entry (apply FUN-NAME . ARGS) means undo the change with |
6011 | \(apply FUN-NAME ARGS). | |
6012 | ||
6013 | An entry (apply DELTA BEG END FUN-NAME . ARGS) supports selective undo | |
6014 | in the active region. BEG and END is the range affected by this entry | |
6015 | and DELTA is the number of bytes added or deleted in that range by | |
6016 | this change. | |
c6c7dc03 | 6017 | |
018ba359 PJ |
6018 | An entry (MARKER . DISTANCE) indicates that the marker MARKER |
6019 | was adjusted in position by the offset DISTANCE (an integer). | |
6020 | ||
6021 | An entry of the form POSITION indicates that point was at the buffer | |
6022 | location given by the integer. Undoing an entry of this form places | |
6023 | point at POSITION. | |
6024 | ||
b4c4f2f4 JB |
6025 | Entries with value `nil' mark undo boundaries. The undo command treats |
6026 | the changes between two undo boundaries as a single step to be undone. | |
018ba359 PJ |
6027 | |
6028 | If the value of the variable is t, undo information is not recorded. */); | |
6029 | ||
7ee72033 MB |
6030 | DEFVAR_PER_BUFFER ("mark-active", ¤t_buffer->mark_active, Qnil, |
6031 | doc: /* Non-nil means the mark and region are currently active in this buffer. */); | |
018ba359 | 6032 | |
7ee72033 MB |
6033 | DEFVAR_PER_BUFFER ("cache-long-line-scans", ¤t_buffer->cache_long_line_scans, Qnil, |
6034 | doc: /* Non-nil means that Emacs should use caches to handle long lines more quickly. | |
018ba359 PJ |
6035 | |
6036 | Normally, the line-motion functions work by scanning the buffer for | |
5629f29b DK |
6037 | newlines. Columnar operations (like `move-to-column' and |
6038 | `compute-motion') also work by scanning the buffer, summing character | |
018ba359 PJ |
6039 | widths as they go. This works well for ordinary text, but if the |
6040 | buffer's lines are very long (say, more than 500 characters), these | |
6041 | motion functions will take longer to execute. Emacs may also take | |
6042 | longer to update the display. | |
6043 | ||
5629f29b | 6044 | If `cache-long-line-scans' is non-nil, these motion functions cache the |
018ba359 PJ |
6045 | results of their scans, and consult the cache to avoid rescanning |
6046 | regions of the buffer until the text is modified. The caches are most | |
6047 | beneficial when they prevent the most searching---that is, when the | |
6048 | buffer contains long lines and large regions of characters with the | |
6049 | same, fixed screen width. | |
6050 | ||
5629f29b | 6051 | When `cache-long-line-scans' is non-nil, processing short lines will |
018ba359 PJ |
6052 | become slightly slower (because of the overhead of consulting the |
6053 | cache), and the caches will use memory roughly proportional to the | |
6054 | number of newlines and characters whose screen width varies. | |
6055 | ||
6056 | The caches require no explicit maintenance; their accuracy is | |
6057 | maintained internally by the Emacs primitives. Enabling or disabling | |
6058 | the cache should not affect the behavior of any of the motion | |
6059 | functions; it should only affect their performance. */); | |
6060 | ||
7ee72033 MB |
6061 | DEFVAR_PER_BUFFER ("point-before-scroll", ¤t_buffer->point_before_scroll, Qnil, |
6062 | doc: /* Value of point before the last series of scroll operations, or nil. */); | |
018ba359 | 6063 | |
7ee72033 MB |
6064 | DEFVAR_PER_BUFFER ("buffer-file-format", ¤t_buffer->file_format, Qnil, |
6065 | doc: /* List of formats to use when saving this buffer. | |
018ba359 | 6066 | Formats are defined by `format-alist'. This variable is |
a9b9a780 | 6067 | set when a file is visited. */); |
be9aafdd | 6068 | |
71ed49fa LT |
6069 | DEFVAR_PER_BUFFER ("buffer-auto-save-file-format", |
6070 | ¤t_buffer->auto_save_file_format, Qnil, | |
6071 | doc: /* *Format in which to write auto-save files. | |
6072 | Should be a list of symbols naming formats that are defined in `format-alist'. | |
6073 | If it is t, which is the default, auto-save files are written in the | |
6074 | same format as a regular save would use. */); | |
6075 | ||
3cb719bd | 6076 | DEFVAR_PER_BUFFER ("buffer-invisibility-spec", |
7ee72033 MB |
6077 | ¤t_buffer->invisibility_spec, Qnil, |
6078 | doc: /* Invisibility spec of this buffer. | |
018ba359 PJ |
6079 | The default is t, which means that text is invisible |
6080 | if it has a non-nil `invisible' property. | |
6081 | If the value is a list, a text character is invisible if its `invisible' | |
b49dd850 | 6082 | property is an element in that list (or is a list with members in common). |
018ba359 PJ |
6083 | If an element is a cons cell of the form (PROP . ELLIPSIS), |
6084 | then characters with property value PROP are invisible, | |
6085 | and they have an ellipsis as well if ELLIPSIS is non-nil. */); | |
3cb719bd | 6086 | |
7962a441 | 6087 | DEFVAR_PER_BUFFER ("buffer-display-count", |
7ee72033 MB |
6088 | ¤t_buffer->display_count, Qnil, |
6089 | doc: /* A number incremented each time this buffer is displayed in a window. | |
018ba359 | 6090 | The function `set-window-buffer' increments it. */); |
3fd364db RS |
6091 | |
6092 | DEFVAR_PER_BUFFER ("buffer-display-time", | |
7ee72033 MB |
6093 | ¤t_buffer->display_time, Qnil, |
6094 | doc: /* Time stamp updated each time this buffer is displayed in a window. | |
018ba359 PJ |
6095 | The function `set-window-buffer' updates this variable |
6096 | to the value obtained by calling `current-time'. | |
6097 | If the buffer has never been shown in a window, the value is nil. */); | |
6098 | ||
7ee72033 MB |
6099 | DEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode, |
6100 | doc: /* *Non-nil means deactivate the mark when the buffer contents change. | |
018ba359 PJ |
6101 | Non-nil also enables highlighting of the region whenever the mark is active. |
6102 | The variable `highlight-nonselected-windows' controls whether to highlight | |
5a39b770 RS |
6103 | all windows or just the selected window. |
6104 | ||
6105 | If the value is `lambda', that enables Transient Mark mode temporarily | |
6106 | until the next buffer modification. If a command sets the value to `only', | |
b3264fd2 RS |
6107 | that enables Transient Mark mode for the following command only. |
6108 | During that following command, the value of `transient-mark-mode' | |
6109 | is `identity'. If it is still `identity' at the end of that command, | |
6110 | it changes to nil. */); | |
c48f61ef RS |
6111 | Vtransient_mark_mode = Qnil; |
6112 | ||
7ee72033 MB |
6113 | DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only, |
6114 | doc: /* *Non-nil means disregard read-only status of buffers or characters. | |
018ba359 PJ |
6115 | If the value is t, disregard `buffer-read-only' and all `read-only' |
6116 | text properties. If the value is a list, disregard `buffer-read-only' | |
6117 | and disregard a `read-only' text property if the property value | |
6118 | is a member of the list. */); | |
a96b68f1 RS |
6119 | Vinhibit_read_only = Qnil; |
6120 | ||
7ee72033 | 6121 | DEFVAR_PER_BUFFER ("cursor-type", ¤t_buffer->cursor_type, Qnil, |
f6e22881 | 6122 | doc: /* Cursor to use when this buffer is in the selected window. |
018ba359 PJ |
6123 | Values are interpreted as follows: |
6124 | ||
b8dc613f JB |
6125 | t use the cursor specified for the frame |
6126 | nil don't display a cursor | |
6127 | box display a filled box cursor | |
6128 | hollow display a hollow box cursor | |
6129 | bar display a vertical bar cursor with default width | |
6130 | (bar . WIDTH) display a vertical bar cursor with width WIDTH | |
6131 | hbar display a horizontal bar cursor with default height | |
b4234f4c | 6132 | (hbar . HEIGHT) display a horizontal bar cursor with height HEIGHT |
b8dc613f | 6133 | ANYTHING ELSE display a hollow box cursor |
cd8d5236 RS |
6134 | |
6135 | When the buffer is displayed in a nonselected window, | |
6136 | this variable has no effect; the cursor appears as a hollow box. */); | |
bb2ec976 | 6137 | |
a3bbced0 | 6138 | DEFVAR_PER_BUFFER ("line-spacing", |
7ee72033 MB |
6139 | ¤t_buffer->extra_line_spacing, Qnil, |
6140 | doc: /* Additional space to put between lines when displaying a buffer. | |
60ebfdf3 KS |
6141 | The space is measured in pixels, and put below lines on window systems. |
6142 | If value is a floating point number, it specifies the spacing relative | |
fc961256 | 6143 | to the default frame line height. A value of nil means add no extra space. */); |
a3bbced0 | 6144 | |
0124c5bd | 6145 | DEFVAR_PER_BUFFER ("cursor-in-non-selected-windows", |
187ccf49 | 6146 | ¤t_buffer->cursor_in_non_selected_windows, Qnil, |
f6e22881 | 6147 | doc: /* *Cursor type to display in non-selected windows. |
fc961256 | 6148 | The value t means to use hollow box cursor. See `cursor-type' for other values. */); |
0124c5bd | 6149 | |
7ee72033 | 6150 | DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions, |
f6e22881 JB |
6151 | doc: /* List of functions called with no args to query before killing a buffer. |
6152 | The buffer being killed will be current while the functions are running. | |
6153 | If any of them returns nil, the buffer is not killed. */); | |
dcdffbf6 RS |
6154 | Vkill_buffer_query_functions = Qnil; |
6155 | ||
43ed3b8d CY |
6156 | DEFVAR_LISP ("change-major-mode-hook", &Vchange_major_mode_hook, |
6157 | doc: /* Normal hook run before changing the major mode of a buffer. | |
6158 | The function `kill-all-local-variables' runs this before doing anything else. */); | |
6159 | Vchange_major_mode_hook = Qnil; | |
6160 | Qchange_major_mode_hook = intern ("change-major-mode-hook"); | |
6161 | staticpro (&Qchange_major_mode_hook); | |
6162 | ||
0dc88e60 | 6163 | defsubr (&Sbuffer_live_p); |
1ab256cb RM |
6164 | defsubr (&Sbuffer_list); |
6165 | defsubr (&Sget_buffer); | |
6166 | defsubr (&Sget_file_buffer); | |
6167 | defsubr (&Sget_buffer_create); | |
336cd056 | 6168 | defsubr (&Smake_indirect_buffer); |
01050cb5 | 6169 | defsubr (&Sgenerate_new_buffer_name); |
1ab256cb RM |
6170 | defsubr (&Sbuffer_name); |
6171 | /*defsubr (&Sbuffer_number);*/ | |
6172 | defsubr (&Sbuffer_file_name); | |
336cd056 | 6173 | defsubr (&Sbuffer_base_buffer); |
79aa712d | 6174 | defsubr (&Sbuffer_local_value); |
1ab256cb RM |
6175 | defsubr (&Sbuffer_local_variables); |
6176 | defsubr (&Sbuffer_modified_p); | |
6177 | defsubr (&Sset_buffer_modified_p); | |
6178 | defsubr (&Sbuffer_modified_tick); | |
3e145152 | 6179 | defsubr (&Sbuffer_chars_modified_tick); |
1ab256cb RM |
6180 | defsubr (&Srename_buffer); |
6181 | defsubr (&Sother_buffer); | |
1ab256cb RM |
6182 | defsubr (&Sbuffer_enable_undo); |
6183 | defsubr (&Skill_buffer); | |
a9ee7a59 | 6184 | defsubr (&Sset_buffer_major_mode); |
1ab256cb RM |
6185 | defsubr (&Sswitch_to_buffer); |
6186 | defsubr (&Spop_to_buffer); | |
6187 | defsubr (&Scurrent_buffer); | |
6188 | defsubr (&Sset_buffer); | |
6189 | defsubr (&Sbarf_if_buffer_read_only); | |
6190 | defsubr (&Sbury_buffer); | |
3ac81adb RS |
6191 | defsubr (&Serase_buffer); |
6192 | defsubr (&Sset_buffer_multibyte); | |
1ab256cb | 6193 | defsubr (&Skill_all_local_variables); |
2eec3b4e | 6194 | |
52f8ec73 | 6195 | defsubr (&Soverlayp); |
2eec3b4e RS |
6196 | defsubr (&Smake_overlay); |
6197 | defsubr (&Sdelete_overlay); | |
6198 | defsubr (&Smove_overlay); | |
8ebafa8d JB |
6199 | defsubr (&Soverlay_start); |
6200 | defsubr (&Soverlay_end); | |
6201 | defsubr (&Soverlay_buffer); | |
6202 | defsubr (&Soverlay_properties); | |
2eec3b4e | 6203 | defsubr (&Soverlays_at); |
74514898 | 6204 | defsubr (&Soverlays_in); |
2eec3b4e | 6205 | defsubr (&Snext_overlay_change); |
239c932b | 6206 | defsubr (&Sprevious_overlay_change); |
2eec3b4e RS |
6207 | defsubr (&Soverlay_recenter); |
6208 | defsubr (&Soverlay_lists); | |
6209 | defsubr (&Soverlay_get); | |
6210 | defsubr (&Soverlay_put); | |
a8c21b48 | 6211 | defsubr (&Srestore_buffer_modified_p); |
1ab256cb RM |
6212 | } |
6213 | ||
dfcf069d | 6214 | void |
1ab256cb RM |
6215 | keys_of_buffer () |
6216 | { | |
6217 | initial_define_key (control_x_map, 'b', "switch-to-buffer"); | |
6218 | initial_define_key (control_x_map, 'k', "kill-buffer"); | |
4158c17d RM |
6219 | |
6220 | /* This must not be in syms_of_buffer, because Qdisabled is not | |
6221 | initialized when that function gets called. */ | |
6222 | Fput (intern ("erase-buffer"), Qdisabled, Qt); | |
1ab256cb | 6223 | } |
6b61353c KH |
6224 | |
6225 | /* arch-tag: e48569bf-69a9-4b65-a23b-8e68769436e1 | |
6226 | (do not change this comment) */ |