Commit | Line | Data |
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b45433b3 | 1 | /* Buffer insertion/deletion and gap motion for GNU Emacs. |
0b5538bd | 2 | Copyright (C) 1985, 1986, 1993, 1994, 1995, 1997, 1998, 1999, 2000, 2001, |
8cabe764 GM |
3 | 2002, 2003, 2004, 2005, 2006, 2007, 2008 |
4 | Free Software Foundation, Inc. | |
b45433b3 JB |
5 | |
6 | This file is part of GNU Emacs. | |
7 | ||
8 | GNU Emacs is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
684d6f5b | 10 | the Free Software Foundation; either version 3, or (at your option) |
b45433b3 JB |
11 | any later version. |
12 | ||
13 | GNU Emacs is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with GNU Emacs; see the file COPYING. If not, write to | |
4fc5845f LK |
20 | the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
21 | Boston, MA 02110-1301, USA. */ | |
b45433b3 JB |
22 | |
23 | ||
18160b98 | 24 | #include <config.h> |
b45433b3 | 25 | #include "lisp.h" |
679194a6 | 26 | #include "intervals.h" |
b45433b3 | 27 | #include "buffer.h" |
811f7370 | 28 | #include "character.h" |
b45433b3 | 29 | #include "window.h" |
d014bf88 | 30 | #include "blockinput.h" |
dfcf069d | 31 | #include "region-cache.h" |
b45433b3 | 32 | |
d206af14 RS |
33 | #ifndef NULL |
34 | #define NULL 0 | |
35 | #endif | |
36 | ||
2b083808 | 37 | static void insert_from_string_1 P_ ((Lisp_Object, int, int, int, int, int, int)); |
ef29f213 | 38 | static void insert_from_buffer_1 (); |
3be11131 RS |
39 | static void gap_left P_ ((int, int, int)); |
40 | static void gap_right P_ ((int, int)); | |
41 | static void adjust_markers_gap_motion P_ ((int, int, int)); | |
b16afa45 | 42 | static void adjust_markers_for_insert P_ ((int, int, int, int, int)); |
809f3d51 | 43 | void adjust_markers_for_delete P_ ((int, int, int, int)); |
b16afa45 | 44 | static void adjust_markers_for_replace P_ ((int, int, int, int, int, int)); |
3be11131 | 45 | static void adjust_point P_ ((int, int)); |
395ec62e | 46 | |
fb2e7d14 RS |
47 | Lisp_Object Fcombine_after_change_execute (); |
48 | ||
49 | /* Non-nil means don't call the after-change-functions right away, | |
50 | just record an element in Vcombine_after_change_calls_list. */ | |
51 | Lisp_Object Vcombine_after_change_calls; | |
52 | ||
53 | /* List of elements of the form (BEG-UNCHANGED END-UNCHANGED CHANGE-AMOUNT) | |
54 | describing changes which happened while combine_after_change_calls | |
55 | was nonzero. We use this to decide how to call them | |
56 | once the deferral ends. | |
57 | ||
58 | In each element. | |
59 | BEG-UNCHANGED is the number of chars before the changed range. | |
60 | END-UNCHANGED is the number of chars after the changed range, | |
61 | and CHANGE-AMOUNT is the number of characters inserted by the change | |
62 | (negative for a deletion). */ | |
63 | Lisp_Object combine_after_change_list; | |
64 | ||
65 | /* Buffer which combine_after_change_list is about. */ | |
66 | Lisp_Object combine_after_change_buffer; | |
27ea0af2 GM |
67 | |
68 | Lisp_Object Qinhibit_modification_hooks; | |
69 | ||
2b083808 | 70 | \f |
60ea6052 RS |
71 | /* Check all markers in the current buffer, looking for something invalid. */ |
72 | ||
73 | static int check_markers_debug_flag; | |
74 | ||
75 | #define CHECK_MARKERS() \ | |
76 | if (check_markers_debug_flag) \ | |
77 | check_markers (); \ | |
78 | else | |
79 | ||
80 | void | |
81 | check_markers () | |
82 | { | |
dab0b04d | 83 | register struct Lisp_Marker *tail; |
9f3ede3c | 84 | int multibyte = ! NILP (current_buffer->enable_multibyte_characters); |
60ea6052 | 85 | |
dab0b04d | 86 | for (tail = BUF_MARKERS (current_buffer); tail; tail = tail->next) |
60ea6052 | 87 | { |
dab0b04d | 88 | if (tail->buffer->text != current_buffer->text) |
60ea6052 | 89 | abort (); |
dab0b04d | 90 | if (tail->charpos > Z) |
60ea6052 | 91 | abort (); |
dab0b04d | 92 | if (tail->bytepos > Z_BYTE) |
60ea6052 | 93 | abort (); |
dab0b04d | 94 | if (multibyte && ! CHAR_HEAD_P (FETCH_BYTE (tail->bytepos))) |
9f3ede3c | 95 | abort (); |
60ea6052 RS |
96 | } |
97 | } | |
98 | \f | |
3be11131 | 99 | /* Move gap to position CHARPOS. |
b45433b3 JB |
100 | Note that this can quit! */ |
101 | ||
c660b094 | 102 | void |
3be11131 RS |
103 | move_gap (charpos) |
104 | int charpos; | |
b45433b3 | 105 | { |
3be11131 | 106 | move_gap_both (charpos, charpos_to_bytepos (charpos)); |
b45433b3 JB |
107 | } |
108 | ||
3be11131 RS |
109 | /* Move gap to byte position BYTEPOS, which is also char position CHARPOS. |
110 | Note that this can quit! */ | |
111 | ||
112 | void | |
113 | move_gap_both (charpos, bytepos) | |
114 | int charpos, bytepos; | |
115 | { | |
116 | if (bytepos < GPT_BYTE) | |
117 | gap_left (charpos, bytepos, 0); | |
118 | else if (bytepos > GPT_BYTE) | |
119 | gap_right (charpos, bytepos); | |
120 | } | |
121 | ||
122 | /* Move the gap to a position less than the current GPT. | |
123 | BYTEPOS describes the new position as a byte position, | |
124 | and CHARPOS is the corresponding char position. | |
b45433b3 JB |
125 | If NEWGAP is nonzero, then don't update beg_unchanged and end_unchanged. */ |
126 | ||
2bcaed71 | 127 | static void |
3be11131 RS |
128 | gap_left (charpos, bytepos, newgap) |
129 | register int charpos, bytepos; | |
b45433b3 JB |
130 | int newgap; |
131 | { | |
132 | register unsigned char *to, *from; | |
133 | register int i; | |
134 | int new_s1; | |
135 | ||
b45433b3 | 136 | if (!newgap) |
a50df55b | 137 | BUF_COMPUTE_UNCHANGED (current_buffer, charpos, GPT); |
b45433b3 | 138 | |
3be11131 | 139 | i = GPT_BYTE; |
b45433b3 JB |
140 | to = GAP_END_ADDR; |
141 | from = GPT_ADDR; | |
3be11131 | 142 | new_s1 = GPT_BYTE; |
b45433b3 JB |
143 | |
144 | /* Now copy the characters. To move the gap down, | |
145 | copy characters up. */ | |
146 | ||
147 | while (1) | |
148 | { | |
149 | /* I gets number of characters left to copy. */ | |
3be11131 | 150 | i = new_s1 - bytepos; |
b45433b3 JB |
151 | if (i == 0) |
152 | break; | |
153 | /* If a quit is requested, stop copying now. | |
3be11131 | 154 | Change BYTEPOS to be where we have actually moved the gap to. */ |
b45433b3 JB |
155 | if (QUITP) |
156 | { | |
3be11131 RS |
157 | bytepos = new_s1; |
158 | charpos = BYTE_TO_CHAR (bytepos); | |
b45433b3 JB |
159 | break; |
160 | } | |
161 | /* Move at most 32000 chars before checking again for a quit. */ | |
162 | if (i > 32000) | |
163 | i = 32000; | |
164 | #ifdef GAP_USE_BCOPY | |
165 | if (i >= 128 | |
166 | /* bcopy is safe if the two areas of memory do not overlap | |
167 | or on systems where bcopy is always safe for moving upward. */ | |
168 | && (BCOPY_UPWARD_SAFE | |
169 | || to - from >= 128)) | |
170 | { | |
171 | /* If overlap is not safe, avoid it by not moving too many | |
172 | characters at once. */ | |
173 | if (!BCOPY_UPWARD_SAFE && i > to - from) | |
174 | i = to - from; | |
175 | new_s1 -= i; | |
176 | from -= i, to -= i; | |
177 | bcopy (from, to, i); | |
178 | } | |
179 | else | |
180 | #endif | |
181 | { | |
182 | new_s1 -= i; | |
183 | while (--i >= 0) | |
184 | *--to = *--from; | |
185 | } | |
186 | } | |
187 | ||
3be11131 RS |
188 | /* Adjust markers, and buffer data structure, to put the gap at BYTEPOS. |
189 | BYTEPOS is where the loop above stopped, which may be what was specified | |
b45433b3 | 190 | or may be where a quit was detected. */ |
3be11131 RS |
191 | adjust_markers_gap_motion (bytepos, GPT_BYTE, GAP_SIZE); |
192 | GPT_BYTE = bytepos; | |
193 | GPT = charpos; | |
194 | if (bytepos < charpos) | |
195 | abort (); | |
469ff680 | 196 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
b45433b3 JB |
197 | QUIT; |
198 | } | |
199 | ||
3be11131 RS |
200 | /* Move the gap to a position greater than than the current GPT. |
201 | BYTEPOS describes the new position as a byte position, | |
202 | and CHARPOS is the corresponding char position. */ | |
203 | ||
2bcaed71 | 204 | static void |
3be11131 RS |
205 | gap_right (charpos, bytepos) |
206 | register int charpos, bytepos; | |
b45433b3 JB |
207 | { |
208 | register unsigned char *to, *from; | |
209 | register int i; | |
210 | int new_s1; | |
211 | ||
a50df55b | 212 | BUF_COMPUTE_UNCHANGED (current_buffer, charpos, GPT); |
b45433b3 | 213 | |
3be11131 | 214 | i = GPT_BYTE; |
b45433b3 JB |
215 | from = GAP_END_ADDR; |
216 | to = GPT_ADDR; | |
3be11131 | 217 | new_s1 = GPT_BYTE; |
b45433b3 JB |
218 | |
219 | /* Now copy the characters. To move the gap up, | |
220 | copy characters down. */ | |
221 | ||
222 | while (1) | |
223 | { | |
224 | /* I gets number of characters left to copy. */ | |
3be11131 | 225 | i = bytepos - new_s1; |
b45433b3 JB |
226 | if (i == 0) |
227 | break; | |
228 | /* If a quit is requested, stop copying now. | |
3be11131 | 229 | Change BYTEPOS to be where we have actually moved the gap to. */ |
b45433b3 JB |
230 | if (QUITP) |
231 | { | |
3be11131 RS |
232 | bytepos = new_s1; |
233 | charpos = BYTE_TO_CHAR (bytepos); | |
b45433b3 JB |
234 | break; |
235 | } | |
236 | /* Move at most 32000 chars before checking again for a quit. */ | |
237 | if (i > 32000) | |
238 | i = 32000; | |
239 | #ifdef GAP_USE_BCOPY | |
240 | if (i >= 128 | |
241 | /* bcopy is safe if the two areas of memory do not overlap | |
242 | or on systems where bcopy is always safe for moving downward. */ | |
243 | && (BCOPY_DOWNWARD_SAFE | |
244 | || from - to >= 128)) | |
245 | { | |
246 | /* If overlap is not safe, avoid it by not moving too many | |
247 | characters at once. */ | |
248 | if (!BCOPY_DOWNWARD_SAFE && i > from - to) | |
249 | i = from - to; | |
250 | new_s1 += i; | |
251 | bcopy (from, to, i); | |
252 | from += i, to += i; | |
253 | } | |
254 | else | |
255 | #endif | |
256 | { | |
257 | new_s1 += i; | |
258 | while (--i >= 0) | |
259 | *to++ = *from++; | |
260 | } | |
261 | } | |
262 | ||
3be11131 RS |
263 | adjust_markers_gap_motion (GPT_BYTE + GAP_SIZE, bytepos + GAP_SIZE, |
264 | - GAP_SIZE); | |
265 | GPT = charpos; | |
266 | GPT_BYTE = bytepos; | |
267 | if (bytepos < charpos) | |
268 | abort (); | |
469ff680 | 269 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
b45433b3 JB |
270 | QUIT; |
271 | } | |
2b083808 | 272 | \f |
3be11131 RS |
273 | /* Add AMOUNT to the byte position of every marker in the current buffer |
274 | whose current byte position is between FROM (exclusive) and TO (inclusive). | |
8948d317 | 275 | |
b45433b3 JB |
276 | Also, any markers past the outside of that interval, in the direction |
277 | of adjustment, are first moved back to the near end of the interval | |
8948d317 RS |
278 | and then adjusted by AMOUNT. |
279 | ||
280 | When the latter adjustment is done, if AMOUNT is negative, | |
281 | we record the adjustment for undo. (This case happens only for | |
3be11131 RS |
282 | deletion.) |
283 | ||
284 | The markers' character positions are not altered, | |
285 | because gap motion does not affect character positions. */ | |
286 | ||
287 | int adjust_markers_test; | |
b45433b3 | 288 | |
2bcaed71 | 289 | static void |
3be11131 | 290 | adjust_markers_gap_motion (from, to, amount) |
b45433b3 JB |
291 | register int from, to, amount; |
292 | { | |
80f6e77c RS |
293 | /* Now that a marker has a bytepos, not counting the gap, |
294 | nothing needs to be done here. */ | |
295 | #if 0 | |
b45433b3 JB |
296 | Lisp_Object marker; |
297 | register struct Lisp_Marker *m; | |
298 | register int mpos; | |
299 | ||
9fbf87cd | 300 | marker = BUF_MARKERS (current_buffer); |
b45433b3 | 301 | |
d427b66a | 302 | while (!NILP (marker)) |
b45433b3 JB |
303 | { |
304 | m = XMARKER (marker); | |
80f6e77c | 305 | mpos = m->bytepos; |
b45433b3 JB |
306 | if (amount > 0) |
307 | { | |
308 | if (mpos > to && mpos < to + amount) | |
3be11131 RS |
309 | { |
310 | if (adjust_markers_test) | |
311 | abort (); | |
312 | mpos = to + amount; | |
313 | } | |
b45433b3 JB |
314 | } |
315 | else | |
316 | { | |
8948d317 RS |
317 | /* Here's the case where a marker is inside text being deleted. |
318 | AMOUNT can be negative for gap motion, too, | |
319 | but then this range contains no markers. */ | |
b45433b3 | 320 | if (mpos > from + amount && mpos <= from) |
8948d317 | 321 | { |
3be11131 RS |
322 | if (adjust_markers_test) |
323 | abort (); | |
324 | mpos = from + amount; | |
8948d317 | 325 | } |
b45433b3 JB |
326 | } |
327 | if (mpos > from && mpos <= to) | |
328 | mpos += amount; | |
329 | m->bufpos = mpos; | |
330 | marker = m->chain; | |
331 | } | |
80f6e77c | 332 | #endif |
b45433b3 | 333 | } |
2b083808 | 334 | \f |
3be11131 RS |
335 | /* Adjust all markers for a deletion |
336 | whose range in bytes is FROM_BYTE to TO_BYTE. | |
337 | The range in charpos is FROM to TO. | |
338 | ||
339 | This function assumes that the gap is adjacent to | |
340 | or inside of the range being deleted. */ | |
beecb55b | 341 | |
809f3d51 | 342 | void |
3be11131 RS |
343 | adjust_markers_for_delete (from, from_byte, to, to_byte) |
344 | register int from, from_byte, to, to_byte; | |
345 | { | |
346 | Lisp_Object marker; | |
347 | register struct Lisp_Marker *m; | |
348 | register int charpos; | |
3be11131 | 349 | |
dab0b04d | 350 | for (m = BUF_MARKERS (current_buffer); m; m = m->next) |
3be11131 | 351 | { |
3be11131 RS |
352 | charpos = m->charpos; |
353 | ||
354 | if (charpos > Z) | |
355 | abort (); | |
356 | ||
357 | /* If the marker is after the deletion, | |
80f6e77c | 358 | relocate by number of chars / bytes deleted. */ |
3be11131 | 359 | if (charpos > to) |
80f6e77c RS |
360 | { |
361 | m->charpos -= to - from; | |
362 | m->bytepos -= to_byte - from_byte; | |
363 | } | |
80f6e77c | 364 | /* Here's the case where a marker is inside text being deleted. */ |
3be11131 RS |
365 | else if (charpos > from) |
366 | { | |
00de2987 | 367 | if (! m->insertion_type) |
dab0b04d | 368 | { /* Normal markers will end up at the beginning of the |
00de2987 | 369 | re-inserted text after undoing a deletion, and must be |
177c0ea7 | 370 | adjusted to move them to the correct place. */ |
dab0b04d | 371 | XSETMISC (marker, m); |
00de2987 | 372 | record_marker_adjustment (marker, from - charpos); |
dab0b04d | 373 | } |
00de2987 | 374 | else if (charpos < to) |
dab0b04d | 375 | { /* Before-insertion markers will automatically move forward |
00de2987 MB |
376 | upon re-inserting the deleted text, so we have to arrange |
377 | for them to move backward to the correct position. */ | |
dab0b04d | 378 | XSETMISC (marker, m); |
00de2987 | 379 | record_marker_adjustment (marker, charpos - to); |
dab0b04d | 380 | } |
3be11131 | 381 | m->charpos = from; |
80f6e77c | 382 | m->bytepos = from_byte; |
3be11131 | 383 | } |
00de2987 MB |
384 | /* Here's the case where a before-insertion marker is immediately |
385 | before the deleted region. */ | |
386 | else if (charpos == from && m->insertion_type) | |
387 | { | |
388 | /* Undoing the change uses normal insertion, which will | |
389 | incorrectly make MARKER move forward, so we arrange for it | |
390 | to then move backward to the correct place at the beginning | |
391 | of the deleted region. */ | |
dab0b04d | 392 | XSETMISC (marker, m); |
00de2987 MB |
393 | record_marker_adjustment (marker, to - from); |
394 | } | |
3be11131 RS |
395 | } |
396 | } | |
23b20a70 | 397 | |
2b083808 | 398 | \f |
432f78d2 RS |
399 | /* Adjust markers for an insertion that stretches from FROM / FROM_BYTE |
400 | to TO / TO_BYTE. We have to relocate the charpos of every marker | |
401 | that points after the insertion (but not their bytepos). | |
3be11131 | 402 | |
3be11131 RS |
403 | When a marker points at the insertion point, |
404 | we advance it if either its insertion-type is t | |
405 | or BEFORE_MARKERS is true. */ | |
406 | ||
407 | static void | |
b16afa45 | 408 | adjust_markers_for_insert (from, from_byte, to, to_byte, before_markers) |
432f78d2 | 409 | register int from, from_byte, to, to_byte; |
b16afa45 | 410 | int before_markers; |
beecb55b | 411 | { |
dab0b04d | 412 | struct Lisp_Marker *m; |
469ff680 | 413 | int adjusted = 0; |
3be11131 RS |
414 | int nchars = to - from; |
415 | int nbytes = to_byte - from_byte; | |
beecb55b | 416 | |
dab0b04d | 417 | for (m = BUF_MARKERS (current_buffer); m; m = m->next) |
beecb55b | 418 | { |
86a56ef3 SM |
419 | eassert (m->bytepos >= m->charpos |
420 | && m->bytepos - m->charpos <= Z_BYTE - Z); | |
1f90a790 | 421 | |
432f78d2 | 422 | if (m->bytepos == from_byte) |
469ff680 | 423 | { |
432f78d2 RS |
424 | if (m->insertion_type || before_markers) |
425 | { | |
b16afa45 KH |
426 | m->bytepos = to_byte; |
427 | m->charpos = to; | |
432f78d2 RS |
428 | if (m->insertion_type) |
429 | adjusted = 1; | |
430 | } | |
ce97a2d7 | 431 | } |
80f6e77c RS |
432 | else if (m->bytepos > from_byte) |
433 | { | |
434 | m->bytepos += nbytes; | |
b16afa45 | 435 | m->charpos += nchars; |
80f6e77c | 436 | } |
beecb55b | 437 | } |
3be11131 RS |
438 | |
439 | /* Adjusting only markers whose insertion-type is t may result in | |
6b61353c KH |
440 | - disordered start and end in overlays, and |
441 | - disordered overlays in the slot `overlays_before' of current_buffer. */ | |
469ff680 | 442 | if (adjusted) |
6b61353c KH |
443 | { |
444 | fix_start_end_in_overlays(from, to); | |
445 | fix_overlays_before (current_buffer, from, to); | |
446 | } | |
beecb55b RS |
447 | } |
448 | ||
3be11131 RS |
449 | /* Adjust point for an insertion of NBYTES bytes, which are NCHARS characters. |
450 | ||
451 | This is used only when the value of point changes due to an insert | |
452 | or delete; it does not represent a conceptual change in point as a | |
453 | marker. In particular, point is not crossing any interval | |
454 | boundaries, so there's no need to use the usual SET_PT macro. In | |
455 | fact it would be incorrect to do so, because either the old or the | |
456 | new value of point is out of sync with the current set of | |
457 | intervals. */ | |
458 | ||
a27a38d8 | 459 | static void |
3be11131 RS |
460 | adjust_point (nchars, nbytes) |
461 | int nchars, nbytes; | |
a27a38d8 | 462 | { |
3be11131 RS |
463 | BUF_PT (current_buffer) += nchars; |
464 | BUF_PT_BYTE (current_buffer) += nbytes; | |
465 | ||
466 | /* In a single-byte buffer, the two positions must be equal. */ | |
86a56ef3 | 467 | eassert (PT_BYTE >= PT && PT_BYTE - PT <= ZV_BYTE - ZV); |
a27a38d8 | 468 | } |
b45433b3 | 469 | \f |
652838b5 KH |
470 | /* Adjust markers for a replacement of a text at FROM (FROM_BYTE) of |
471 | length OLD_CHARS (OLD_BYTES) to a new text of length NEW_CHARS | |
adee4f91 KH |
472 | (NEW_BYTES). It is assumed that OLD_CHARS > 0, i.e., this is not |
473 | an insertion. */ | |
652838b5 KH |
474 | |
475 | static void | |
476 | adjust_markers_for_replace (from, from_byte, old_chars, old_bytes, | |
b16afa45 | 477 | new_chars, new_bytes) |
652838b5 | 478 | int from, from_byte, old_chars, old_bytes, new_chars, new_bytes; |
652838b5 | 479 | { |
dab0b04d | 480 | register struct Lisp_Marker *m; |
652838b5 | 481 | int prev_to_byte = from_byte + old_bytes; |
b16afa45 | 482 | int diff_chars = new_chars - old_chars; |
652838b5 KH |
483 | int diff_bytes = new_bytes - old_bytes; |
484 | ||
dab0b04d | 485 | for (m = BUF_MARKERS (current_buffer); m; m = m->next) |
652838b5 | 486 | { |
adee4f91 | 487 | if (m->bytepos >= prev_to_byte) |
652838b5 | 488 | { |
adee4f91 KH |
489 | m->charpos += diff_chars; |
490 | m->bytepos += diff_bytes; | |
652838b5 | 491 | } |
adee4f91 | 492 | else if (m->bytepos > from_byte) |
652838b5 | 493 | { |
652838b5 | 494 | m->charpos = from; |
b16afa45 | 495 | m->bytepos = from_byte; |
652838b5 | 496 | } |
652838b5 | 497 | } |
3019692c KH |
498 | |
499 | CHECK_MARKERS (); | |
652838b5 KH |
500 | } |
501 | ||
502 | \f | |
3be11131 | 503 | /* Make the gap NBYTES_ADDED bytes longer. */ |
b45433b3 | 504 | |
c660b094 | 505 | void |
8af5b8e7 | 506 | make_gap_larger (nbytes_added) |
3be11131 | 507 | int nbytes_added; |
b45433b3 | 508 | { |
b45433b3 JB |
509 | Lisp_Object tem; |
510 | int real_gap_loc; | |
3be11131 | 511 | int real_gap_loc_byte; |
b45433b3 JB |
512 | int old_gap_size; |
513 | ||
514 | /* If we have to get more space, get enough to last a while. */ | |
3be11131 | 515 | nbytes_added += 2000; |
b45433b3 | 516 | |
94056516 RS |
517 | /* Don't allow a buffer size that won't fit in an int |
518 | even if it will fit in a Lisp integer. | |
e17144de AS |
519 | That won't work because so many places use `int'. |
520 | ||
521 | Make sure we don't introduce overflows in the calculation. */ | |
177c0ea7 | 522 | |
e17144de AS |
523 | if (Z_BYTE - BEG_BYTE + GAP_SIZE |
524 | >= (((EMACS_INT) 1 << (min (VALBITS, BITS_PER_INT) - 1)) - 1 | |
525 | - nbytes_added)) | |
14f6194b | 526 | error ("Buffer exceeds maximum size"); |
94056516 | 527 | |
71a7bfa7 | 528 | enlarge_buffer_text (current_buffer, nbytes_added); |
b45433b3 JB |
529 | |
530 | /* Prevent quitting in move_gap. */ | |
531 | tem = Vinhibit_quit; | |
532 | Vinhibit_quit = Qt; | |
533 | ||
534 | real_gap_loc = GPT; | |
3be11131 | 535 | real_gap_loc_byte = GPT_BYTE; |
b45433b3 JB |
536 | old_gap_size = GAP_SIZE; |
537 | ||
538 | /* Call the newly allocated space a gap at the end of the whole space. */ | |
539 | GPT = Z + GAP_SIZE; | |
7d92db58 | 540 | GPT_BYTE = Z_BYTE + GAP_SIZE; |
3be11131 | 541 | GAP_SIZE = nbytes_added; |
b45433b3 JB |
542 | |
543 | /* Move the new gap down to be consecutive with the end of the old one. | |
544 | This adjusts the markers properly too. */ | |
3be11131 | 545 | gap_left (real_gap_loc + old_gap_size, real_gap_loc_byte + old_gap_size, 1); |
b45433b3 JB |
546 | |
547 | /* Now combine the two into one large gap. */ | |
548 | GAP_SIZE += old_gap_size; | |
549 | GPT = real_gap_loc; | |
3be11131 | 550 | GPT_BYTE = real_gap_loc_byte; |
b45433b3 | 551 | |
469ff680 KH |
552 | /* Put an anchor. */ |
553 | *(Z_ADDR) = 0; | |
554 | ||
b45433b3 JB |
555 | Vinhibit_quit = tem; |
556 | } | |
8af5b8e7 AI |
557 | |
558 | ||
7273faa1 | 559 | /* Make the gap NBYTES_REMOVED bytes shorter. */ |
8af5b8e7 AI |
560 | |
561 | void | |
562 | make_gap_smaller (nbytes_removed) | |
563 | int nbytes_removed; | |
564 | { | |
565 | Lisp_Object tem; | |
566 | int real_gap_loc; | |
567 | int real_gap_loc_byte; | |
568 | int real_Z; | |
569 | int real_Z_byte; | |
73df3b72 KS |
570 | int real_beg_unchanged; |
571 | int new_gap_size; | |
8af5b8e7 AI |
572 | |
573 | /* Make sure the gap is at least 20 bytes. */ | |
574 | if (GAP_SIZE - nbytes_removed < 20) | |
575 | nbytes_removed = GAP_SIZE - 20; | |
576 | ||
577 | /* Prevent quitting in move_gap. */ | |
578 | tem = Vinhibit_quit; | |
579 | Vinhibit_quit = Qt; | |
580 | ||
581 | real_gap_loc = GPT; | |
582 | real_gap_loc_byte = GPT_BYTE; | |
73df3b72 | 583 | new_gap_size = GAP_SIZE - nbytes_removed; |
8af5b8e7 AI |
584 | real_Z = Z; |
585 | real_Z_byte = Z_BYTE; | |
73df3b72 | 586 | real_beg_unchanged = BEG_UNCHANGED; |
8af5b8e7 AI |
587 | |
588 | /* Pretend that the last unwanted part of the gap is the entire gap, | |
589 | and that the first desired part of the gap is part of the buffer | |
590 | text. */ | |
73df3b72 KS |
591 | bzero (GPT_ADDR, new_gap_size); |
592 | GPT += new_gap_size; | |
593 | GPT_BYTE += new_gap_size; | |
594 | Z += new_gap_size; | |
595 | Z_BYTE += new_gap_size; | |
8af5b8e7 AI |
596 | GAP_SIZE = nbytes_removed; |
597 | ||
598 | /* Move the unwanted pretend gap to the end of the buffer. This | |
599 | adjusts the markers properly too. */ | |
600 | gap_right (Z, Z_BYTE); | |
601 | ||
602 | enlarge_buffer_text (current_buffer, -nbytes_removed); | |
603 | ||
604 | /* Now restore the desired gap. */ | |
73df3b72 | 605 | GAP_SIZE = new_gap_size; |
8af5b8e7 AI |
606 | GPT = real_gap_loc; |
607 | GPT_BYTE = real_gap_loc_byte; | |
608 | Z = real_Z; | |
609 | Z_BYTE = real_Z_byte; | |
73df3b72 | 610 | BEG_UNCHANGED = real_beg_unchanged; |
8af5b8e7 AI |
611 | |
612 | /* Put an anchor. */ | |
613 | *(Z_ADDR) = 0; | |
614 | ||
615 | Vinhibit_quit = tem; | |
616 | } | |
617 | ||
618 | void | |
619 | make_gap (nbytes_added) | |
620 | int nbytes_added; | |
621 | { | |
622 | if (nbytes_added >= 0) | |
623 | make_gap_larger (nbytes_added); | |
d77fbc16 | 624 | #if defined USE_MMAP_FOR_BUFFERS || defined REL_ALLOC || defined DOUG_LEA_MALLOC |
8af5b8e7 AI |
625 | else |
626 | make_gap_smaller (-nbytes_added); | |
627 | #endif | |
628 | } | |
b45433b3 | 629 | \f |
2b083808 RS |
630 | /* Copy NBYTES bytes of text from FROM_ADDR to TO_ADDR. |
631 | FROM_MULTIBYTE says whether the incoming text is multibyte. | |
632 | TO_MULTIBYTE says whether to store the text as multibyte. | |
633 | If FROM_MULTIBYTE != TO_MULTIBYTE, we convert. | |
634 | ||
635 | Return the number of bytes stored at TO_ADDR. */ | |
636 | ||
637 | int | |
638 | copy_text (from_addr, to_addr, nbytes, | |
639 | from_multibyte, to_multibyte) | |
641a26d2 | 640 | const unsigned char *from_addr; |
2b083808 RS |
641 | unsigned char *to_addr; |
642 | int nbytes; | |
643 | int from_multibyte, to_multibyte; | |
644 | { | |
645 | if (from_multibyte == to_multibyte) | |
646 | { | |
647 | bcopy (from_addr, to_addr, nbytes); | |
648 | return nbytes; | |
649 | } | |
650 | else if (from_multibyte) | |
651 | { | |
652 | int nchars = 0; | |
653 | int bytes_left = nbytes; | |
6021f7c5 | 654 | Lisp_Object tbl = Qnil; |
f44cbcd8 | 655 | |
2b083808 RS |
656 | while (bytes_left > 0) |
657 | { | |
b16afa45 KH |
658 | int thislen, c; |
659 | c = STRING_CHAR_AND_LENGTH (from_addr, bytes_left, thislen); | |
47e20ea4 | 660 | if (!ASCII_CHAR_P (c)) |
4ec36780 | 661 | c = multibyte_char_to_unibyte (c, tbl); |
f44cbcd8 | 662 | *to_addr++ = c; |
2b083808 | 663 | from_addr += thislen; |
7e79b8e0 | 664 | bytes_left -= thislen; |
2b083808 RS |
665 | nchars++; |
666 | } | |
667 | return nchars; | |
668 | } | |
669 | else | |
670 | { | |
671 | unsigned char *initial_to_addr = to_addr; | |
672 | ||
673 | /* Convert single-byte to multibyte. */ | |
674 | while (nbytes > 0) | |
675 | { | |
676 | int c = *from_addr++; | |
2b083808 | 677 | |
b16afa45 | 678 | if (c >= 0200) |
2b083808 | 679 | { |
59a52d50 | 680 | c = unibyte_char_to_multibyte (c); |
0ef71121 | 681 | to_addr += CHAR_STRING (c, to_addr); |
2b083808 RS |
682 | nbytes--; |
683 | } | |
684 | else | |
685 | /* Special case for speed. */ | |
686 | *to_addr++ = c, nbytes--; | |
687 | } | |
688 | return to_addr - initial_to_addr; | |
689 | } | |
690 | } | |
691 | ||
692 | /* Return the number of bytes it would take | |
693 | to convert some single-byte text to multibyte. | |
694 | The single-byte text consists of NBYTES bytes at PTR. */ | |
695 | ||
696 | int | |
697 | count_size_as_multibyte (ptr, nbytes) | |
641a26d2 | 698 | const unsigned char *ptr; |
2b083808 RS |
699 | int nbytes; |
700 | { | |
701 | int i; | |
702 | int outgoing_nbytes = 0; | |
703 | ||
704 | for (i = 0; i < nbytes; i++) | |
705 | { | |
706 | unsigned int c = *ptr++; | |
59a52d50 | 707 | |
b16afa45 | 708 | if (c < 0200) |
59a52d50 KH |
709 | outgoing_nbytes++; |
710 | else | |
2b083808 | 711 | { |
59a52d50 | 712 | c = unibyte_char_to_multibyte (c); |
643044eb | 713 | outgoing_nbytes += CHAR_BYTES (c); |
2b083808 | 714 | } |
2b083808 RS |
715 | } |
716 | ||
717 | return outgoing_nbytes; | |
718 | } | |
719 | \f | |
b45433b3 | 720 | /* Insert a string of specified length before point. |
2b083808 RS |
721 | This function judges multibyteness based on |
722 | enable_multibyte_characters in the current buffer; | |
723 | it never converts between single-byte and multibyte. | |
724 | ||
ef29f213 KH |
725 | DO NOT use this for the contents of a Lisp string or a Lisp buffer! |
726 | prepare_to_modify_buffer could relocate the text. */ | |
b45433b3 | 727 | |
c660b094 | 728 | void |
3be11131 | 729 | insert (string, nbytes) |
641a26d2 | 730 | register const unsigned char *string; |
dfcf069d | 731 | register int nbytes; |
b45433b3 | 732 | { |
3be11131 | 733 | if (nbytes > 0) |
395ec62e | 734 | { |
bab3eee1 EZ |
735 | int len = chars_in_text (string, nbytes), opoint; |
736 | insert_1_both (string, len, nbytes, 0, 1, 0); | |
737 | opoint = PT - len; | |
738 | signal_after_change (opoint, 0, len); | |
0ef71121 | 739 | update_compositions (opoint, PT, CHECK_BORDER); |
cd11ef31 RS |
740 | } |
741 | } | |
742 | ||
2b083808 RS |
743 | /* Likewise, but inherit text properties from neighboring characters. */ |
744 | ||
c660b094 | 745 | void |
3be11131 | 746 | insert_and_inherit (string, nbytes) |
641a26d2 | 747 | register const unsigned char *string; |
dfcf069d | 748 | register int nbytes; |
cd11ef31 | 749 | { |
3be11131 | 750 | if (nbytes > 0) |
cd11ef31 | 751 | { |
bab3eee1 EZ |
752 | int len = chars_in_text (string, nbytes), opoint; |
753 | insert_1_both (string, len, nbytes, 1, 1, 0); | |
754 | opoint = PT - len; | |
755 | signal_after_change (opoint, 0, len); | |
0ef71121 | 756 | update_compositions (opoint, PT, CHECK_BORDER); |
395ec62e KH |
757 | } |
758 | } | |
b45433b3 | 759 | |
2b083808 | 760 | /* Insert the character C before point. Do not inherit text properties. */ |
3be11131 | 761 | |
c660b094 | 762 | void |
3be11131 RS |
763 | insert_char (c) |
764 | int c; | |
765 | { | |
0ef71121 | 766 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
2b083808 RS |
767 | int len; |
768 | ||
769 | if (! NILP (current_buffer->enable_multibyte_characters)) | |
0ef71121 | 770 | len = CHAR_STRING (c, str); |
2b083808 RS |
771 | else |
772 | { | |
773 | len = 1; | |
0ef71121 | 774 | str[0] = c; |
2b083808 | 775 | } |
3be11131 RS |
776 | |
777 | insert (str, len); | |
778 | } | |
779 | ||
2b083808 | 780 | /* Insert the null-terminated string S before point. */ |
3be11131 RS |
781 | |
782 | void | |
783 | insert_string (s) | |
641a26d2 | 784 | const char *s; |
3be11131 RS |
785 | { |
786 | insert (s, strlen (s)); | |
787 | } | |
788 | ||
789 | /* Like `insert' except that all markers pointing at the place where | |
790 | the insertion happens are adjusted to point after it. | |
791 | Don't use this function to insert part of a Lisp string, | |
792 | since gc could happen and relocate it. */ | |
793 | ||
794 | void | |
795 | insert_before_markers (string, nbytes) | |
641a26d2 | 796 | const unsigned char *string; |
3be11131 RS |
797 | register int nbytes; |
798 | { | |
799 | if (nbytes > 0) | |
800 | { | |
bab3eee1 EZ |
801 | int len = chars_in_text (string, nbytes), opoint; |
802 | insert_1_both (string, len, nbytes, 0, 1, 1); | |
803 | opoint = PT - len; | |
804 | signal_after_change (opoint, 0, len); | |
0ef71121 | 805 | update_compositions (opoint, PT, CHECK_BORDER); |
3be11131 RS |
806 | } |
807 | } | |
808 | ||
2b083808 RS |
809 | /* Likewise, but inherit text properties from neighboring characters. */ |
810 | ||
3be11131 RS |
811 | void |
812 | insert_before_markers_and_inherit (string, nbytes) | |
641a26d2 | 813 | const unsigned char *string; |
3be11131 RS |
814 | register int nbytes; |
815 | { | |
816 | if (nbytes > 0) | |
817 | { | |
bab3eee1 EZ |
818 | int len = chars_in_text (string, nbytes), opoint; |
819 | insert_1_both (string, len, nbytes, 1, 1, 1); | |
820 | opoint = PT - len; | |
821 | signal_after_change (opoint, 0, len); | |
0ef71121 | 822 | update_compositions (opoint, PT, CHECK_BORDER); |
3be11131 RS |
823 | } |
824 | } | |
1f90a790 | 825 | |
3be11131 RS |
826 | /* Subroutine used by the insert functions above. */ |
827 | ||
828 | void | |
829 | insert_1 (string, nbytes, inherit, prepare, before_markers) | |
641a26d2 | 830 | register const unsigned char *string; |
3be11131 RS |
831 | register int nbytes; |
832 | int inherit, prepare, before_markers; | |
395ec62e | 833 | { |
432f78d2 RS |
834 | insert_1_both (string, chars_in_text (string, nbytes), nbytes, |
835 | inherit, prepare, before_markers); | |
836 | } | |
b16afa45 | 837 | |
1f90a790 | 838 | \f |
b16afa45 KH |
839 | #ifdef BYTE_COMBINING_DEBUG |
840 | ||
432f78d2 RS |
841 | /* See if the bytes before POS/POS_BYTE combine with bytes |
842 | at the start of STRING to form a single character. | |
ce97a2d7 | 843 | If so, return the number of bytes at the start of STRING |
432f78d2 | 844 | which combine in this way. Otherwise, return 0. */ |
b45433b3 | 845 | |
432f78d2 RS |
846 | int |
847 | count_combining_before (string, length, pos, pos_byte) | |
641a26d2 | 848 | const unsigned char *string; |
432f78d2 RS |
849 | int length; |
850 | int pos, pos_byte; | |
851 | { | |
cae184f2 | 852 | int len, combining_bytes; |
641a26d2 | 853 | const unsigned char *p; |
b45433b3 | 854 | |
432f78d2 RS |
855 | if (NILP (current_buffer->enable_multibyte_characters)) |
856 | return 0; | |
cae184f2 KH |
857 | |
858 | /* At first, we can exclude the following cases: | |
859 | (1) STRING[0] can't be a following byte of multibyte sequence. | |
860 | (2) POS is the start of the current buffer. | |
861 | (3) A character before POS is not a multibyte character. */ | |
862 | if (length == 0 || CHAR_HEAD_P (*string)) /* case (1) */ | |
432f78d2 | 863 | return 0; |
cae184f2 | 864 | if (pos_byte == BEG_BYTE) /* case (2) */ |
432f78d2 | 865 | return 0; |
cae184f2 KH |
866 | len = 1; |
867 | p = BYTE_POS_ADDR (pos_byte - 1); | |
868 | while (! CHAR_HEAD_P (*p)) p--, len++; | |
869 | if (! BASE_LEADING_CODE_P (*p)) /* case (3) */ | |
432f78d2 | 870 | return 0; |
cae184f2 | 871 | |
cae184f2 KH |
872 | combining_bytes = BYTES_BY_CHAR_HEAD (*p) - len; |
873 | if (combining_bytes <= 0) | |
874 | /* The character preceding POS is, complete and no room for | |
875 | combining bytes (combining_bytes == 0), or an independent 8-bit | |
876 | character (combining_bytes < 0). */ | |
432f78d2 | 877 | return 0; |
ce97a2d7 | 878 | |
cae184f2 KH |
879 | /* We have a combination situation. Count the bytes at STRING that |
880 | may combine. */ | |
881 | p = string + 1; | |
ce97a2d7 RS |
882 | while (!CHAR_HEAD_P (*p) && p < string + length) |
883 | p++; | |
884 | ||
cae184f2 | 885 | return (combining_bytes < p - string ? combining_bytes : p - string); |
432f78d2 | 886 | } |
b45433b3 | 887 | |
432f78d2 RS |
888 | /* See if the bytes after POS/POS_BYTE combine with bytes |
889 | at the end of STRING to form a single character. | |
890 | If so, return the number of bytes after POS/POS_BYTE | |
891 | which combine in this way. Otherwise, return 0. */ | |
679194a6 | 892 | |
432f78d2 RS |
893 | int |
894 | count_combining_after (string, length, pos, pos_byte) | |
641a26d2 | 895 | const unsigned char *string; |
432f78d2 RS |
896 | int length; |
897 | int pos, pos_byte; | |
898 | { | |
6021f7c5 | 899 | int opos_byte = pos_byte; |
432f78d2 | 900 | int i; |
6021f7c5 | 901 | int bytes; |
cae184f2 | 902 | unsigned char *bufp; |
3be11131 | 903 | |
432f78d2 RS |
904 | if (NILP (current_buffer->enable_multibyte_characters)) |
905 | return 0; | |
cae184f2 KH |
906 | |
907 | /* At first, we can exclude the following cases: | |
908 | (1) The last byte of STRING is an ASCII. | |
909 | (2) POS is the last of the current buffer. | |
910 | (3) A character at POS can't be a following byte of multibyte | |
911 | character. */ | |
912 | if (length > 0 && ASCII_BYTE_P (string[length - 1])) /* case (1) */ | |
913 | return 0; | |
914 | if (pos_byte == Z_BYTE) /* case (2) */ | |
432f78d2 | 915 | return 0; |
cae184f2 KH |
916 | bufp = BYTE_POS_ADDR (pos_byte); |
917 | if (CHAR_HEAD_P (*bufp)) /* case (3) */ | |
918 | return 0; | |
919 | ||
432f78d2 | 920 | i = length - 1; |
b57a7b0b | 921 | while (i >= 0 && ! CHAR_HEAD_P (string[i])) |
432f78d2 RS |
922 | { |
923 | i--; | |
924 | } | |
b57a7b0b KH |
925 | if (i < 0) |
926 | { | |
cae184f2 KH |
927 | /* All characters in STRING are not character head. We must |
928 | check also preceding bytes at POS. We are sure that the gap | |
929 | is at POS. */ | |
930 | unsigned char *p = BEG_ADDR; | |
b57a7b0b | 931 | i = pos_byte - 2; |
cae184f2 | 932 | while (i >= 0 && ! CHAR_HEAD_P (p[i])) |
b57a7b0b | 933 | i--; |
cae184f2 | 934 | if (i < 0 || !BASE_LEADING_CODE_P (p[i])) |
b57a7b0b | 935 | return 0; |
0ef71121 | 936 | |
cae184f2 KH |
937 | bytes = BYTES_BY_CHAR_HEAD (p[i]); |
938 | return (bytes <= pos_byte - 1 - i + length | |
939 | ? 0 | |
940 | : bytes - (pos_byte - 1 - i + length)); | |
b57a7b0b | 941 | } |
cae184f2 | 942 | if (!BASE_LEADING_CODE_P (string[i])) |
432f78d2 RS |
943 | return 0; |
944 | ||
cae184f2 KH |
945 | bytes = BYTES_BY_CHAR_HEAD (string[i]) - (length - i); |
946 | bufp++, pos_byte++; | |
947 | while (!CHAR_HEAD_P (*bufp)) bufp++, pos_byte++; | |
cd11ef31 | 948 | |
cae184f2 | 949 | return (bytes <= pos_byte - opos_byte ? bytes : pos_byte - opos_byte); |
b45433b3 | 950 | } |
2b083808 | 951 | |
b16afa45 | 952 | #endif |
9f3ede3c | 953 | |
1f90a790 | 954 | \f |
2b083808 RS |
955 | /* Insert a sequence of NCHARS chars which occupy NBYTES bytes |
956 | starting at STRING. INHERIT, PREPARE and BEFORE_MARKERS | |
957 | are the same as in insert_1. */ | |
958 | ||
959 | void | |
960 | insert_1_both (string, nchars, nbytes, inherit, prepare, before_markers) | |
641a26d2 | 961 | register const unsigned char *string; |
2b083808 RS |
962 | register int nchars, nbytes; |
963 | int inherit, prepare, before_markers; | |
964 | { | |
da80a8d5 GM |
965 | if (nchars == 0) |
966 | return; | |
177c0ea7 | 967 | |
57404188 KH |
968 | if (NILP (current_buffer->enable_multibyte_characters)) |
969 | nchars = nbytes; | |
970 | ||
35d63725 RS |
971 | if (prepare) |
972 | /* Do this before moving and increasing the gap, | |
973 | because the before-change hooks might move the gap | |
974 | or make it smaller. */ | |
975 | prepare_to_modify_buffer (PT, PT, NULL); | |
976 | ||
2b083808 RS |
977 | if (PT != GPT) |
978 | move_gap_both (PT, PT_BYTE); | |
979 | if (GAP_SIZE < nbytes) | |
980 | make_gap (nbytes - GAP_SIZE); | |
981 | ||
b16afa45 KH |
982 | #ifdef BYTE_COMBINING_DEBUG |
983 | if (count_combining_before (string, nbytes, PT, PT_BYTE) | |
984 | || count_combining_after (string, nbytes, PT, PT_BYTE)) | |
985 | abort (); | |
986 | #endif | |
432f78d2 RS |
987 | |
988 | /* Record deletion of the surrounding text that combines with | |
989 | the insertion. This, together with recording the insertion, | |
b16afa45 KH |
990 | will add up to the right stuff in the undo list. */ |
991 | record_insert (PT, nchars); | |
2b083808 | 992 | MODIFF++; |
3e145152 | 993 | CHARS_MODIFF = MODIFF; |
2b083808 RS |
994 | |
995 | bcopy (string, GPT_ADDR, nbytes); | |
996 | ||
2b083808 | 997 | GAP_SIZE -= nbytes; |
1f90a790 RS |
998 | GPT += nchars; |
999 | ZV += nchars; | |
1000 | Z += nchars; | |
2b083808 RS |
1001 | GPT_BYTE += nbytes; |
1002 | ZV_BYTE += nbytes; | |
1003 | Z_BYTE += nbytes; | |
1004 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ | |
1f90a790 | 1005 | |
1f90a790 RS |
1006 | if (GPT_BYTE < GPT) |
1007 | abort (); | |
1008 | ||
9dde4e0c KS |
1009 | /* The insert may have been in the unchanged region, so check again. */ |
1010 | if (Z - GPT < END_UNCHANGED) | |
1011 | END_UNCHANGED = Z - GPT; | |
1012 | ||
1f90a790 | 1013 | adjust_overlays_for_insert (PT, nchars); |
432f78d2 | 1014 | adjust_markers_for_insert (PT, PT_BYTE, |
1f90a790 | 1015 | PT + nchars, PT_BYTE + nbytes, |
2b083808 | 1016 | before_markers); |
ce97a2d7 | 1017 | |
1f90a790 | 1018 | if (BUF_INTERVALS (current_buffer) != 0) |
1f90a790 RS |
1019 | offset_intervals (current_buffer, PT, nchars); |
1020 | ||
ce97a2d7 | 1021 | if (!inherit && BUF_INTERVALS (current_buffer) != 0) |
f2cab2ea GM |
1022 | set_text_properties (make_number (PT), make_number (PT + nchars), |
1023 | Qnil, Qnil, Qnil); | |
ce97a2d7 | 1024 | |
b16afa45 | 1025 | adjust_point (nchars, nbytes); |
828f1ed3 KH |
1026 | |
1027 | CHECK_MARKERS (); | |
2b083808 | 1028 | } |
3be11131 | 1029 | \f |
679194a6 | 1030 | /* Insert the part of the text of STRING, a Lisp object assumed to be |
2b083808 RS |
1031 | of type string, consisting of the LENGTH characters (LENGTH_BYTE bytes) |
1032 | starting at position POS / POS_BYTE. If the text of STRING has properties, | |
1033 | copy them into the buffer. | |
679194a6 JA |
1034 | |
1035 | It does not work to use `insert' for this, because a GC could happen | |
7e1ea612 JB |
1036 | before we bcopy the stuff into the buffer, and relocate the string |
1037 | without insert noticing. */ | |
679194a6 | 1038 | |
c660b094 | 1039 | void |
2b083808 | 1040 | insert_from_string (string, pos, pos_byte, length, length_byte, inherit) |
b45433b3 | 1041 | Lisp_Object string; |
2b083808 | 1042 | register int pos, pos_byte, length, length_byte; |
9391e591 | 1043 | int inherit; |
395ec62e | 1044 | { |
62b82678 | 1045 | int opoint = PT; |
d8bf4256 RS |
1046 | |
1047 | if (SCHARS (string) == 0) | |
1048 | return; | |
1049 | ||
62b82678 RS |
1050 | insert_from_string_1 (string, pos, pos_byte, length, length_byte, |
1051 | inherit, 0); | |
1052 | signal_after_change (opoint, 0, PT - opoint); | |
0ef71121 | 1053 | update_compositions (opoint, PT, CHECK_BORDER); |
395ec62e KH |
1054 | } |
1055 | ||
2b083808 RS |
1056 | /* Like `insert_from_string' except that all markers pointing |
1057 | at the place where the insertion happens are adjusted to point after it. */ | |
3be11131 RS |
1058 | |
1059 | void | |
2b083808 RS |
1060 | insert_from_string_before_markers (string, pos, pos_byte, |
1061 | length, length_byte, inherit) | |
395ec62e | 1062 | Lisp_Object string; |
2b083808 | 1063 | register int pos, pos_byte, length, length_byte; |
395ec62e | 1064 | int inherit; |
3be11131 | 1065 | { |
62b82678 | 1066 | int opoint = PT; |
d8bf4256 RS |
1067 | |
1068 | if (SCHARS (string) == 0) | |
1069 | return; | |
1070 | ||
62b82678 RS |
1071 | insert_from_string_1 (string, pos, pos_byte, length, length_byte, |
1072 | inherit, 1); | |
1073 | signal_after_change (opoint, 0, PT - opoint); | |
0ef71121 | 1074 | update_compositions (opoint, PT, CHECK_BORDER); |
3be11131 RS |
1075 | } |
1076 | ||
1077 | /* Subroutine of the insertion functions above. */ | |
1078 | ||
1079 | static void | |
2b083808 RS |
1080 | insert_from_string_1 (string, pos, pos_byte, nchars, nbytes, |
1081 | inherit, before_markers) | |
3be11131 | 1082 | Lisp_Object string; |
2b083808 | 1083 | register int pos, pos_byte, nchars, nbytes; |
3be11131 | 1084 | int inherit, before_markers; |
b45433b3 | 1085 | { |
b45433b3 | 1086 | struct gcpro gcpro1; |
2b083808 | 1087 | int outgoing_nbytes = nbytes; |
ce97a2d7 | 1088 | INTERVAL intervals; |
2b083808 RS |
1089 | |
1090 | /* Make OUTGOING_NBYTES describe the text | |
1091 | as it will be inserted in this buffer. */ | |
1092 | ||
1093 | if (NILP (current_buffer->enable_multibyte_characters)) | |
1094 | outgoing_nbytes = nchars; | |
2a1d8be0 | 1095 | else if (! STRING_MULTIBYTE (string)) |
2b083808 | 1096 | outgoing_nbytes |
f7e233a8 | 1097 | = count_size_as_multibyte (SDATA (string) + pos_byte, |
2b083808 | 1098 | nbytes); |
b45433b3 | 1099 | |
b45433b3 | 1100 | GCPRO1 (string); |
35d63725 RS |
1101 | /* Do this before moving and increasing the gap, |
1102 | because the before-change hooks might move the gap | |
1103 | or make it smaller. */ | |
d206af14 | 1104 | prepare_to_modify_buffer (PT, PT, NULL); |
b45433b3 | 1105 | |
2bcaed71 | 1106 | if (PT != GPT) |
3be11131 | 1107 | move_gap_both (PT, PT_BYTE); |
534b9840 | 1108 | if (GAP_SIZE < outgoing_nbytes) |
2b083808 | 1109 | make_gap (outgoing_nbytes - GAP_SIZE); |
b45433b3 JB |
1110 | UNGCPRO; |
1111 | ||
2b083808 RS |
1112 | /* Copy the string text into the buffer, perhaps converting |
1113 | between single-byte and multibyte. */ | |
d5db4077 | 1114 | copy_text (SDATA (string) + pos_byte, GPT_ADDR, nbytes, |
2a1d8be0 | 1115 | STRING_MULTIBYTE (string), |
2b083808 | 1116 | ! NILP (current_buffer->enable_multibyte_characters)); |
b45433b3 | 1117 | |
b16afa45 | 1118 | #ifdef BYTE_COMBINING_DEBUG |
432f78d2 RS |
1119 | /* We have copied text into the gap, but we have not altered |
1120 | PT or PT_BYTE yet. So we can pass PT and PT_BYTE | |
1121 | to these functions and get the same results as we would | |
1122 | have got earlier on. Meanwhile, PT_ADDR does point to | |
1123 | the text that has been stored by copy_text. */ | |
b16afa45 KH |
1124 | if (count_combining_before (GPT_ADDR, outgoing_nbytes, PT, PT_BYTE) |
1125 | || count_combining_after (GPT_ADDR, outgoing_nbytes, PT, PT_BYTE)) | |
1126 | abort (); | |
1127 | #endif | |
432f78d2 | 1128 | |
b16afa45 | 1129 | record_insert (PT, nchars); |
432f78d2 | 1130 | MODIFF++; |
3e145152 | 1131 | CHARS_MODIFF = MODIFF; |
432f78d2 | 1132 | |
7792090e | 1133 | GAP_SIZE -= outgoing_nbytes; |
1f90a790 RS |
1134 | GPT += nchars; |
1135 | ZV += nchars; | |
1136 | Z += nchars; | |
2b083808 RS |
1137 | GPT_BYTE += outgoing_nbytes; |
1138 | ZV_BYTE += outgoing_nbytes; | |
1139 | Z_BYTE += outgoing_nbytes; | |
469ff680 | 1140 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
3be11131 RS |
1141 | |
1142 | if (GPT_BYTE < GPT) | |
1143 | abort (); | |
679194a6 | 1144 | |
9dde4e0c KS |
1145 | /* The insert may have been in the unchanged region, so check again. */ |
1146 | if (Z - GPT < END_UNCHANGED) | |
1147 | END_UNCHANGED = Z - GPT; | |
1148 | ||
1f90a790 RS |
1149 | adjust_overlays_for_insert (PT, nchars); |
1150 | adjust_markers_for_insert (PT, PT_BYTE, PT + nchars, | |
1151 | PT_BYTE + outgoing_nbytes, | |
1f90a790 | 1152 | before_markers); |
ce97a2d7 | 1153 | |
1f90a790 RS |
1154 | offset_intervals (current_buffer, PT, nchars); |
1155 | ||
d5db4077 | 1156 | intervals = STRING_INTERVALS (string); |
b16afa45 | 1157 | /* Get the intervals for the part of the string we are inserting. */ |
d5db4077 | 1158 | if (nbytes < SBYTES (string)) |
1f90a790 | 1159 | intervals = copy_intervals (intervals, pos, nchars); |
177c0ea7 | 1160 | |
ce97a2d7 | 1161 | /* Insert those intervals. */ |
1f90a790 | 1162 | graft_intervals_into_buffer (intervals, PT, nchars, |
9391e591 | 1163 | current_buffer, inherit); |
ce97a2d7 | 1164 | |
b16afa45 | 1165 | adjust_point (nchars, outgoing_nbytes); |
8f924df7 KH |
1166 | |
1167 | CHECK_MARKERS (); | |
1168 | } | |
1169 | \f | |
1170 | /* Insert a sequence of NCHARS chars which occupy NBYTES bytes | |
1171 | starting at GPT_ADDR. */ | |
1172 | ||
1173 | void | |
1174 | insert_from_gap (nchars, nbytes) | |
13818c30 | 1175 | register EMACS_INT nchars, nbytes; |
8f924df7 KH |
1176 | { |
1177 | if (NILP (current_buffer->enable_multibyte_characters)) | |
1178 | nchars = nbytes; | |
1179 | ||
1180 | record_insert (GPT, nchars); | |
1181 | MODIFF++; | |
1182 | ||
1183 | GAP_SIZE -= nbytes; | |
1184 | GPT += nchars; | |
1185 | ZV += nchars; | |
1186 | Z += nchars; | |
1187 | GPT_BYTE += nbytes; | |
1188 | ZV_BYTE += nbytes; | |
1189 | Z_BYTE += nbytes; | |
1190 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ | |
1191 | ||
1192 | if (GPT_BYTE < GPT) | |
1193 | abort (); | |
1194 | ||
c669988b KH |
1195 | adjust_overlays_for_insert (GPT - nchars, nchars); |
1196 | adjust_markers_for_insert (GPT - nchars, GPT_BYTE - nbytes, | |
1197 | GPT, GPT_BYTE, 0); | |
8f924df7 KH |
1198 | |
1199 | if (BUF_INTERVALS (current_buffer) != 0) | |
c669988b KH |
1200 | { |
1201 | offset_intervals (current_buffer, GPT - nchars, nchars); | |
1202 | graft_intervals_into_buffer (NULL_INTERVAL, GPT - nchars, nchars, | |
1203 | current_buffer, 0); | |
1204 | } | |
8f924df7 KH |
1205 | |
1206 | if (GPT - nchars < PT) | |
1207 | adjust_point (nchars, nbytes); | |
1208 | ||
1209 | CHECK_MARKERS (); | |
b45433b3 | 1210 | } |
3be11131 RS |
1211 | \f |
1212 | /* Insert text from BUF, NCHARS characters starting at CHARPOS, into the | |
ef29f213 KH |
1213 | current buffer. If the text in BUF has properties, they are absorbed |
1214 | into the current buffer. | |
1215 | ||
1216 | It does not work to use `insert' for this, because a malloc could happen | |
1217 | and relocate BUF's text before the bcopy happens. */ | |
1218 | ||
1219 | void | |
3be11131 | 1220 | insert_from_buffer (buf, charpos, nchars, inherit) |
ef29f213 | 1221 | struct buffer *buf; |
3be11131 | 1222 | int charpos, nchars; |
ef29f213 KH |
1223 | int inherit; |
1224 | { | |
62b82678 | 1225 | int opoint = PT; |
3be11131 | 1226 | |
62b82678 RS |
1227 | insert_from_buffer_1 (buf, charpos, nchars, inherit); |
1228 | signal_after_change (opoint, 0, PT - opoint); | |
0ef71121 | 1229 | update_compositions (opoint, PT, CHECK_BORDER); |
ef29f213 KH |
1230 | } |
1231 | ||
1232 | static void | |
3be11131 | 1233 | insert_from_buffer_1 (buf, from, nchars, inherit) |
ef29f213 | 1234 | struct buffer *buf; |
3be11131 | 1235 | int from, nchars; |
ef29f213 KH |
1236 | int inherit; |
1237 | { | |
0aa8c4b2 | 1238 | register Lisp_Object temp; |
4468c4f1 | 1239 | int chunk, chunk_expanded; |
3be11131 RS |
1240 | int from_byte = buf_charpos_to_bytepos (buf, from); |
1241 | int to_byte = buf_charpos_to_bytepos (buf, from + nchars); | |
2b083808 RS |
1242 | int incoming_nbytes = to_byte - from_byte; |
1243 | int outgoing_nbytes = incoming_nbytes; | |
ce97a2d7 | 1244 | INTERVAL intervals; |
2b083808 RS |
1245 | |
1246 | /* Make OUTGOING_NBYTES describe the text | |
1247 | as it will be inserted in this buffer. */ | |
1248 | ||
1249 | if (NILP (current_buffer->enable_multibyte_characters)) | |
1250 | outgoing_nbytes = nchars; | |
1251 | else if (NILP (buf->enable_multibyte_characters)) | |
4468c4f1 KH |
1252 | { |
1253 | int outgoing_before_gap = 0; | |
1254 | int outgoing_after_gap = 0; | |
ef29f213 | 1255 | |
4468c4f1 KH |
1256 | if (from < BUF_GPT (buf)) |
1257 | { | |
1258 | chunk = BUF_GPT_BYTE (buf) - from_byte; | |
1259 | if (chunk > incoming_nbytes) | |
1260 | chunk = incoming_nbytes; | |
1261 | outgoing_before_gap | |
1262 | = count_size_as_multibyte (BUF_BYTE_ADDRESS (buf, from_byte), | |
1263 | chunk); | |
1264 | } | |
1265 | else | |
1266 | chunk = 0; | |
1267 | ||
1268 | if (chunk < incoming_nbytes) | |
1269 | outgoing_after_gap | |
177c0ea7 | 1270 | = count_size_as_multibyte (BUF_BYTE_ADDRESS (buf, |
4468c4f1 KH |
1271 | from_byte + chunk), |
1272 | incoming_nbytes - chunk); | |
1273 | ||
1274 | outgoing_nbytes = outgoing_before_gap + outgoing_after_gap; | |
1275 | } | |
177c0ea7 | 1276 | |
ef29f213 | 1277 | /* Make sure point-max won't overflow after this insertion. */ |
2b083808 RS |
1278 | XSETINT (temp, outgoing_nbytes + Z); |
1279 | if (outgoing_nbytes + Z != XINT (temp)) | |
3be11131 | 1280 | error ("Maximum buffer size exceeded"); |
ef29f213 | 1281 | |
35d63725 RS |
1282 | /* Do this before moving and increasing the gap, |
1283 | because the before-change hooks might move the gap | |
1284 | or make it smaller. */ | |
d206af14 | 1285 | prepare_to_modify_buffer (PT, PT, NULL); |
ef29f213 KH |
1286 | |
1287 | if (PT != GPT) | |
3be11131 | 1288 | move_gap_both (PT, PT_BYTE); |
2b083808 RS |
1289 | if (GAP_SIZE < outgoing_nbytes) |
1290 | make_gap (outgoing_nbytes - GAP_SIZE); | |
ef29f213 | 1291 | |
3be11131 | 1292 | if (from < BUF_GPT (buf)) |
ef29f213 | 1293 | { |
3be11131 | 1294 | chunk = BUF_GPT_BYTE (buf) - from_byte; |
2b083808 RS |
1295 | if (chunk > incoming_nbytes) |
1296 | chunk = incoming_nbytes; | |
4468c4f1 KH |
1297 | /* Record number of output bytes, so we know where |
1298 | to put the output from the second copy_text. */ | |
1299 | chunk_expanded | |
1300 | = copy_text (BUF_BYTE_ADDRESS (buf, from_byte), | |
1301 | GPT_ADDR, chunk, | |
1302 | ! NILP (buf->enable_multibyte_characters), | |
1303 | ! NILP (current_buffer->enable_multibyte_characters)); | |
ef29f213 KH |
1304 | } |
1305 | else | |
4468c4f1 KH |
1306 | chunk_expanded = chunk = 0; |
1307 | ||
2b083808 RS |
1308 | if (chunk < incoming_nbytes) |
1309 | copy_text (BUF_BYTE_ADDRESS (buf, from_byte + chunk), | |
4468c4f1 | 1310 | GPT_ADDR + chunk_expanded, incoming_nbytes - chunk, |
2b083808 RS |
1311 | ! NILP (buf->enable_multibyte_characters), |
1312 | ! NILP (current_buffer->enable_multibyte_characters)); | |
ef29f213 | 1313 | |
b16afa45 | 1314 | #ifdef BYTE_COMBINING_DEBUG |
432f78d2 RS |
1315 | /* We have copied text into the gap, but we have not altered |
1316 | PT or PT_BYTE yet. So we can pass PT and PT_BYTE | |
1317 | to these functions and get the same results as we would | |
1f90a790 | 1318 | have got earlier on. Meanwhile, GPT_ADDR does point to |
432f78d2 | 1319 | the text that has been stored by copy_text. */ |
b16afa45 KH |
1320 | if (count_combining_before (GPT_ADDR, outgoing_nbytes, PT, PT_BYTE) |
1321 | || count_combining_after (GPT_ADDR, outgoing_nbytes, PT, PT_BYTE)) | |
1322 | abort (); | |
1323 | #endif | |
432f78d2 | 1324 | |
b16afa45 | 1325 | record_insert (PT, nchars); |
432f78d2 | 1326 | MODIFF++; |
3e145152 | 1327 | CHARS_MODIFF = MODIFF; |
432f78d2 | 1328 | |
2b083808 | 1329 | GAP_SIZE -= outgoing_nbytes; |
1f90a790 RS |
1330 | GPT += nchars; |
1331 | ZV += nchars; | |
1332 | Z += nchars; | |
2b083808 RS |
1333 | GPT_BYTE += outgoing_nbytes; |
1334 | ZV_BYTE += outgoing_nbytes; | |
1335 | Z_BYTE += outgoing_nbytes; | |
469ff680 | 1336 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
1f90a790 | 1337 | |
1f90a790 RS |
1338 | if (GPT_BYTE < GPT) |
1339 | abort (); | |
1340 | ||
9dde4e0c KS |
1341 | /* The insert may have been in the unchanged region, so check again. */ |
1342 | if (Z - GPT < END_UNCHANGED) | |
1343 | END_UNCHANGED = Z - GPT; | |
1344 | ||
1f90a790 RS |
1345 | adjust_overlays_for_insert (PT, nchars); |
1346 | adjust_markers_for_insert (PT, PT_BYTE, PT + nchars, | |
432f78d2 | 1347 | PT_BYTE + outgoing_nbytes, |
b16afa45 | 1348 | 0); |
ce97a2d7 | 1349 | |
1f90a790 RS |
1350 | if (BUF_INTERVALS (current_buffer) != 0) |
1351 | offset_intervals (current_buffer, PT, nchars); | |
ce97a2d7 | 1352 | |
b16afa45 | 1353 | /* Get the intervals for the part of the string we are inserting. */ |
ce97a2d7 | 1354 | intervals = BUF_INTERVALS (buf); |
f1a6b216 | 1355 | if (nchars < BUF_Z (buf) - BUF_BEG (buf)) |
06d8227a GM |
1356 | { |
1357 | if (buf == current_buffer && PT <= from) | |
1358 | from += nchars; | |
1359 | intervals = copy_intervals (intervals, from, nchars); | |
1360 | } | |
177c0ea7 | 1361 | |
ce97a2d7 | 1362 | /* Insert those intervals. */ |
1f90a790 | 1363 | graft_intervals_into_buffer (intervals, PT, nchars, current_buffer, inherit); |
ce97a2d7 | 1364 | |
b16afa45 | 1365 | adjust_point (nchars, outgoing_nbytes); |
b45433b3 JB |
1366 | } |
1367 | \f | |
652838b5 KH |
1368 | /* Record undo information and adjust markers and position keepers for |
1369 | a replacement of a text PREV_TEXT at FROM to a new text of LEN | |
1370 | chars (LEN_BYTE bytes) which resides in the gap just after | |
1371 | GPT_ADDR. | |
1372 | ||
1373 | PREV_TEXT nil means the new text was just inserted. */ | |
2d9eea44 | 1374 | |
1e9c7b7d | 1375 | void |
652838b5 KH |
1376 | adjust_after_replace (from, from_byte, prev_text, len, len_byte) |
1377 | int from, from_byte, len, len_byte; | |
1378 | Lisp_Object prev_text; | |
1e9c7b7d | 1379 | { |
652838b5 | 1380 | int nchars_del = 0, nbytes_del = 0; |
61415a25 | 1381 | |
b16afa45 KH |
1382 | #ifdef BYTE_COMBINING_DEBUG |
1383 | if (count_combining_before (GPT_ADDR, len_byte, from, from_byte) | |
1384 | || count_combining_after (GPT_ADDR, len_byte, from, from_byte)) | |
1385 | abort (); | |
1386 | #endif | |
1387 | ||
828f1ed3 KH |
1388 | if (STRINGP (prev_text)) |
1389 | { | |
d5db4077 KR |
1390 | nchars_del = SCHARS (prev_text); |
1391 | nbytes_del = SBYTES (prev_text); | |
828f1ed3 KH |
1392 | } |
1393 | ||
61415a25 KH |
1394 | /* Update various buffer positions for the new text. */ |
1395 | GAP_SIZE -= len_byte; | |
1396 | ZV += len; Z+= len; | |
1397 | ZV_BYTE += len_byte; Z_BYTE += len_byte; | |
1398 | GPT += len; GPT_BYTE += len_byte; | |
1399 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ | |
1400 | ||
adee4f91 KH |
1401 | if (nchars_del > 0) |
1402 | adjust_markers_for_replace (from, from_byte, nchars_del, nbytes_del, | |
1403 | len, len_byte); | |
1404 | else | |
1405 | adjust_markers_for_insert (from, from_byte, | |
1406 | from + len, from_byte + len_byte, 0); | |
b16afa45 | 1407 | |
828f1ed3 KH |
1408 | if (! EQ (current_buffer->undo_list, Qt)) |
1409 | { | |
828f1ed3 | 1410 | if (nchars_del > 0) |
b16afa45 KH |
1411 | record_delete (from, prev_text); |
1412 | record_insert (from, len); | |
828f1ed3 | 1413 | } |
652838b5 KH |
1414 | |
1415 | if (len > nchars_del) | |
1416 | adjust_overlays_for_insert (from, len - nchars_del); | |
1417 | else if (len < nchars_del) | |
1418 | adjust_overlays_for_delete (from, nchars_del - len); | |
61415a25 | 1419 | if (BUF_INTERVALS (current_buffer) != 0) |
4a7cf15f KH |
1420 | { |
1421 | offset_intervals (current_buffer, from, len - nchars_del); | |
4a7cf15f | 1422 | } |
61415a25 | 1423 | |
b16afa45 KH |
1424 | if (from < PT) |
1425 | adjust_point (len - nchars_del, len_byte - nbytes_del); | |
61415a25 | 1426 | |
9f3ede3c | 1427 | /* As byte combining will decrease Z, we must check this again. */ |
a50df55b GM |
1428 | if (Z - GPT < END_UNCHANGED) |
1429 | END_UNCHANGED = Z - GPT; | |
9f3ede3c | 1430 | |
60ea6052 RS |
1431 | CHECK_MARKERS (); |
1432 | ||
1e9c7b7d | 1433 | if (len == 0) |
b58e3ca1 RS |
1434 | evaporate_overlays (from); |
1435 | MODIFF++; | |
3e145152 | 1436 | CHARS_MODIFF = MODIFF; |
b58e3ca1 RS |
1437 | } |
1438 | ||
1439 | /* Like adjust_after_replace, but doesn't require PREV_TEXT. | |
1440 | This is for use when undo is not enabled in the current buffer. */ | |
1441 | ||
1442 | void | |
1443 | adjust_after_replace_noundo (from, from_byte, nchars_del, nbytes_del, len, len_byte) | |
1444 | int from, from_byte, nchars_del, nbytes_del, len, len_byte; | |
1445 | { | |
1446 | #ifdef BYTE_COMBINING_DEBUG | |
1447 | if (count_combining_before (GPT_ADDR, len_byte, from, from_byte) | |
1448 | || count_combining_after (GPT_ADDR, len_byte, from, from_byte)) | |
1449 | abort (); | |
1450 | #endif | |
1451 | ||
1452 | /* Update various buffer positions for the new text. */ | |
1453 | GAP_SIZE -= len_byte; | |
1454 | ZV += len; Z+= len; | |
1455 | ZV_BYTE += len_byte; Z_BYTE += len_byte; | |
1456 | GPT += len; GPT_BYTE += len_byte; | |
1457 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ | |
1458 | ||
1459 | if (nchars_del > 0) | |
1460 | adjust_markers_for_replace (from, from_byte, nchars_del, nbytes_del, | |
1461 | len, len_byte); | |
1462 | else | |
1463 | adjust_markers_for_insert (from, from_byte, | |
1464 | from + len, from_byte + len_byte, 0); | |
1465 | ||
1466 | if (len > nchars_del) | |
1467 | adjust_overlays_for_insert (from, len - nchars_del); | |
1468 | else if (len < nchars_del) | |
1469 | adjust_overlays_for_delete (from, nchars_del - len); | |
1470 | if (BUF_INTERVALS (current_buffer) != 0) | |
1471 | { | |
1472 | offset_intervals (current_buffer, from, len - nchars_del); | |
1473 | } | |
1474 | ||
1475 | if (from < PT) | |
1476 | adjust_point (len - nchars_del, len_byte - nbytes_del); | |
1477 | ||
1478 | /* As byte combining will decrease Z, we must check this again. */ | |
1479 | if (Z - GPT < END_UNCHANGED) | |
1480 | END_UNCHANGED = Z - GPT; | |
1481 | ||
1482 | CHECK_MARKERS (); | |
1483 | ||
1484 | if (len == 0) | |
1e9c7b7d KH |
1485 | evaporate_overlays (from); |
1486 | MODIFF++; | |
3e145152 | 1487 | CHARS_MODIFF = MODIFF; |
1e9c7b7d KH |
1488 | } |
1489 | ||
652838b5 KH |
1490 | /* Record undo information, adjust markers and position keepers for an |
1491 | insertion of a text from FROM (FROM_BYTE) to TO (TO_BYTE). The | |
1492 | text already exists in the current buffer but character length (TO | |
1493 | - FROM) may be incorrect, the correct length is NEWLEN. */ | |
1494 | ||
1495 | void | |
1496 | adjust_after_insert (from, from_byte, to, to_byte, newlen) | |
1497 | int from, from_byte, to, to_byte, newlen; | |
1498 | { | |
1499 | int len = to - from, len_byte = to_byte - from_byte; | |
1500 | ||
1501 | if (GPT != to) | |
1502 | move_gap_both (to, to_byte); | |
1503 | GAP_SIZE += len_byte; | |
1504 | GPT -= len; GPT_BYTE -= len_byte; | |
1505 | ZV -= len; ZV_BYTE -= len_byte; | |
1506 | Z -= len; Z_BYTE -= len_byte; | |
1507 | adjust_after_replace (from, from_byte, Qnil, newlen, len_byte); | |
1508 | } | |
085db7de | 1509 | \f |
3be11131 | 1510 | /* Replace the text from character positions FROM to TO with NEW, |
c5ca4d3a RS |
1511 | If PREPARE is nonzero, call prepare_to_modify_buffer. |
1512 | If INHERIT, the newly inserted text should inherit text properties | |
1513 | from the surrounding non-deleted text. */ | |
1514 | ||
1515 | /* Note that this does not yet handle markers quite right. | |
1516 | Also it needs to record a single undo-entry that does a replacement | |
1517 | rather than a separate delete and insert. | |
60aa777a RS |
1518 | That way, undo will also handle markers properly. |
1519 | ||
1520 | But if MARKERS is 0, don't relocate markers. */ | |
c5ca4d3a RS |
1521 | |
1522 | void | |
60aa777a | 1523 | replace_range (from, to, new, prepare, inherit, markers) |
c5ca4d3a | 1524 | Lisp_Object new; |
60aa777a | 1525 | int from, to, prepare, inherit, markers; |
c5ca4d3a | 1526 | { |
d5db4077 KR |
1527 | int inschars = SCHARS (new); |
1528 | int insbytes = SBYTES (new); | |
3be11131 RS |
1529 | int from_byte, to_byte; |
1530 | int nbytes_del, nchars_del; | |
c5ca4d3a RS |
1531 | register Lisp_Object temp; |
1532 | struct gcpro gcpro1; | |
ce97a2d7 | 1533 | INTERVAL intervals; |
1f90a790 | 1534 | int outgoing_insbytes = insbytes; |
23b20a70 | 1535 | Lisp_Object deletion; |
c5ca4d3a | 1536 | |
60ea6052 RS |
1537 | CHECK_MARKERS (); |
1538 | ||
c5ca4d3a | 1539 | GCPRO1 (new); |
6bbd7a29 | 1540 | deletion = Qnil; |
c5ca4d3a RS |
1541 | |
1542 | if (prepare) | |
1543 | { | |
1544 | int range_length = to - from; | |
1545 | prepare_to_modify_buffer (from, to, &from); | |
1546 | to = from + range_length; | |
1547 | } | |
1548 | ||
3be11131 RS |
1549 | UNGCPRO; |
1550 | ||
c5ca4d3a RS |
1551 | /* Make args be valid */ |
1552 | if (from < BEGV) | |
1553 | from = BEGV; | |
1554 | if (to > ZV) | |
1555 | to = ZV; | |
1556 | ||
3be11131 RS |
1557 | from_byte = CHAR_TO_BYTE (from); |
1558 | to_byte = CHAR_TO_BYTE (to); | |
c5ca4d3a | 1559 | |
3be11131 RS |
1560 | nchars_del = to - from; |
1561 | nbytes_del = to_byte - from_byte; | |
1562 | ||
1563 | if (nbytes_del <= 0 && insbytes == 0) | |
1564 | return; | |
c5ca4d3a | 1565 | |
1f90a790 RS |
1566 | /* Make OUTGOING_INSBYTES describe the text |
1567 | as it will be inserted in this buffer. */ | |
1568 | ||
1569 | if (NILP (current_buffer->enable_multibyte_characters)) | |
1570 | outgoing_insbytes = inschars; | |
2a1d8be0 | 1571 | else if (! STRING_MULTIBYTE (new)) |
1f90a790 | 1572 | outgoing_insbytes |
d5db4077 | 1573 | = count_size_as_multibyte (SDATA (new), insbytes); |
1f90a790 | 1574 | |
c5ca4d3a | 1575 | /* Make sure point-max won't overflow after this insertion. */ |
3be11131 RS |
1576 | XSETINT (temp, Z_BYTE - nbytes_del + insbytes); |
1577 | if (Z_BYTE - nbytes_del + insbytes != XINT (temp)) | |
1578 | error ("Maximum buffer size exceeded"); | |
c5ca4d3a | 1579 | |
c5ca4d3a RS |
1580 | GCPRO1 (new); |
1581 | ||
1582 | /* Make sure the gap is somewhere in or next to what we are deleting. */ | |
1583 | if (from > GPT) | |
3be11131 | 1584 | gap_right (from, from_byte); |
c5ca4d3a | 1585 | if (to < GPT) |
3be11131 | 1586 | gap_left (to, to_byte, 0); |
c5ca4d3a | 1587 | |
039af53a KH |
1588 | /* Even if we don't record for undo, we must keep the original text |
1589 | because we may have to recover it because of inappropriate byte | |
1590 | combining. */ | |
b16afa45 KH |
1591 | if (! EQ (current_buffer->undo_list, Qt)) |
1592 | deletion = make_buffer_string_both (from, from_byte, to, to_byte, 1); | |
c5ca4d3a | 1593 | |
3be11131 RS |
1594 | GAP_SIZE += nbytes_del; |
1595 | ZV -= nchars_del; | |
1596 | Z -= nchars_del; | |
1597 | ZV_BYTE -= nbytes_del; | |
1598 | Z_BYTE -= nbytes_del; | |
c5ca4d3a | 1599 | GPT = from; |
3be11131 | 1600 | GPT_BYTE = from_byte; |
017e09ac | 1601 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
c5ca4d3a | 1602 | |
3be11131 RS |
1603 | if (GPT_BYTE < GPT) |
1604 | abort (); | |
1605 | ||
a50df55b GM |
1606 | if (GPT - BEG < BEG_UNCHANGED) |
1607 | BEG_UNCHANGED = GPT - BEG; | |
1608 | if (Z - GPT < END_UNCHANGED) | |
1609 | END_UNCHANGED = Z - GPT; | |
c5ca4d3a | 1610 | |
3be11131 RS |
1611 | if (GAP_SIZE < insbytes) |
1612 | make_gap (insbytes - GAP_SIZE); | |
c5ca4d3a | 1613 | |
1f90a790 RS |
1614 | /* Copy the string text into the buffer, perhaps converting |
1615 | between single-byte and multibyte. */ | |
d5db4077 | 1616 | copy_text (SDATA (new), GPT_ADDR, insbytes, |
2a1d8be0 | 1617 | STRING_MULTIBYTE (new), |
1f90a790 RS |
1618 | ! NILP (current_buffer->enable_multibyte_characters)); |
1619 | ||
b16afa45 | 1620 | #ifdef BYTE_COMBINING_DEBUG |
255c7dae RS |
1621 | /* We have copied text into the gap, but we have not marked |
1622 | it as part of the buffer. So we can use the old FROM and FROM_BYTE | |
1623 | here, for both the previous text and the following text. | |
1624 | Meanwhile, GPT_ADDR does point to | |
432f78d2 | 1625 | the text that has been stored by copy_text. */ |
b16afa45 KH |
1626 | if (count_combining_before (GPT_ADDR, outgoing_insbytes, from, from_byte) |
1627 | || count_combining_after (GPT_ADDR, outgoing_insbytes, from, from_byte)) | |
1628 | abort (); | |
1629 | #endif | |
432f78d2 | 1630 | |
23b20a70 KH |
1631 | if (! EQ (current_buffer->undo_list, Qt)) |
1632 | { | |
bec1aca2 RS |
1633 | /* Record the insertion first, so that when we undo, |
1634 | the deletion will be undone first. Thus, undo | |
1635 | will insert before deleting, and thus will keep | |
1636 | the markers before and after this text separate. */ | |
1637 | record_insert (from + SCHARS (deletion), inschars); | |
b16afa45 | 1638 | record_delete (from, deletion); |
23b20a70 | 1639 | } |
c5ca4d3a | 1640 | |
1f90a790 RS |
1641 | GAP_SIZE -= outgoing_insbytes; |
1642 | GPT += inschars; | |
1643 | ZV += inschars; | |
1644 | Z += inschars; | |
1645 | GPT_BYTE += outgoing_insbytes; | |
1646 | ZV_BYTE += outgoing_insbytes; | |
1647 | Z_BYTE += outgoing_insbytes; | |
c5ca4d3a RS |
1648 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
1649 | ||
3be11131 RS |
1650 | if (GPT_BYTE < GPT) |
1651 | abort (); | |
1652 | ||
c5ca4d3a RS |
1653 | /* Adjust the overlay center as needed. This must be done after |
1654 | adjusting the markers that bound the overlays. */ | |
3be11131 | 1655 | adjust_overlays_for_delete (from, nchars_del); |
1f90a790 | 1656 | adjust_overlays_for_insert (from, inschars); |
048a0fbb RS |
1657 | |
1658 | /* Adjust markers for the deletion and the insertion. */ | |
60aa777a | 1659 | if (markers) |
048a0fbb RS |
1660 | adjust_markers_for_replace (from, from_byte, nchars_del, nbytes_del, |
1661 | inschars, outgoing_insbytes); | |
c5ca4d3a | 1662 | |
255c7dae | 1663 | offset_intervals (current_buffer, from, inschars - nchars_del); |
ce97a2d7 RS |
1664 | |
1665 | /* Get the intervals for the part of the string we are inserting-- | |
1666 | not including the combined-before bytes. */ | |
d5db4077 | 1667 | intervals = STRING_INTERVALS (new); |
ce97a2d7 | 1668 | /* Insert those intervals. */ |
1f90a790 | 1669 | graft_intervals_into_buffer (intervals, from, inschars, |
ce97a2d7 | 1670 | current_buffer, inherit); |
c5ca4d3a | 1671 | |
1f90a790 RS |
1672 | /* Relocate point as if it were a marker. */ |
1673 | if (from < PT) | |
8bedbe9d | 1674 | adjust_point ((from + inschars - (PT < to ? PT : to)), |
1f90a790 | 1675 | (from_byte + outgoing_insbytes |
8bedbe9d | 1676 | - (PT_BYTE < to_byte ? PT_BYTE : to_byte))); |
c5ca4d3a | 1677 | |
1f90a790 RS |
1678 | if (outgoing_insbytes == 0) |
1679 | evaporate_overlays (from); | |
93b882e8 | 1680 | |
60ea6052 RS |
1681 | CHECK_MARKERS (); |
1682 | ||
c5ca4d3a | 1683 | MODIFF++; |
3e145152 | 1684 | CHARS_MODIFF = MODIFF; |
c5ca4d3a RS |
1685 | UNGCPRO; |
1686 | ||
255c7dae | 1687 | signal_after_change (from, nchars_del, GPT - from); |
0ef71121 | 1688 | update_compositions (from, GPT, CHECK_BORDER); |
c5ca4d3a RS |
1689 | } |
1690 | \f | |
085db7de RS |
1691 | /* Replace the text from character positions FROM to TO with |
1692 | the text in INS of length INSCHARS. | |
1693 | Keep the text properties that applied to the old characters | |
1694 | (extending them to all the new chars if there are more new chars). | |
1695 | ||
1696 | Note that this does not yet handle markers quite right. | |
1697 | ||
1698 | If MARKERS is nonzero, relocate markers. | |
1699 | ||
1700 | Unlike most functions at this level, never call | |
1701 | prepare_to_modify_buffer and never call signal_after_change. */ | |
1702 | ||
1703 | void | |
1704 | replace_range_2 (from, from_byte, to, to_byte, ins, inschars, insbytes, markers) | |
1705 | int from, from_byte, to, to_byte; | |
1706 | char *ins; | |
1707 | int inschars, insbytes, markers; | |
1708 | { | |
1709 | int nbytes_del, nchars_del; | |
1710 | Lisp_Object temp; | |
1711 | ||
1712 | CHECK_MARKERS (); | |
1713 | ||
1714 | nchars_del = to - from; | |
1715 | nbytes_del = to_byte - from_byte; | |
1716 | ||
1717 | if (nbytes_del <= 0 && insbytes == 0) | |
1718 | return; | |
1719 | ||
1720 | /* Make sure point-max won't overflow after this insertion. */ | |
1721 | XSETINT (temp, Z_BYTE - nbytes_del + insbytes); | |
1722 | if (Z_BYTE - nbytes_del + insbytes != XINT (temp)) | |
1723 | error ("Maximum buffer size exceeded"); | |
1724 | ||
1725 | /* Make sure the gap is somewhere in or next to what we are deleting. */ | |
1726 | if (from > GPT) | |
1727 | gap_right (from, from_byte); | |
1728 | if (to < GPT) | |
1729 | gap_left (to, to_byte, 0); | |
1730 | ||
1731 | GAP_SIZE += nbytes_del; | |
1732 | ZV -= nchars_del; | |
1733 | Z -= nchars_del; | |
1734 | ZV_BYTE -= nbytes_del; | |
1735 | Z_BYTE -= nbytes_del; | |
1736 | GPT = from; | |
1737 | GPT_BYTE = from_byte; | |
1738 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ | |
1739 | ||
1740 | if (GPT_BYTE < GPT) | |
1741 | abort (); | |
1742 | ||
1743 | if (GPT - BEG < BEG_UNCHANGED) | |
1744 | BEG_UNCHANGED = GPT - BEG; | |
1745 | if (Z - GPT < END_UNCHANGED) | |
1746 | END_UNCHANGED = Z - GPT; | |
1747 | ||
1748 | if (GAP_SIZE < insbytes) | |
1749 | make_gap (insbytes - GAP_SIZE); | |
1750 | ||
1751 | /* Copy the replacement text into the buffer. */ | |
1752 | bcopy (ins, GPT_ADDR, insbytes); | |
1753 | ||
1754 | #ifdef BYTE_COMBINING_DEBUG | |
1755 | /* We have copied text into the gap, but we have not marked | |
1756 | it as part of the buffer. So we can use the old FROM and FROM_BYTE | |
1757 | here, for both the previous text and the following text. | |
1758 | Meanwhile, GPT_ADDR does point to | |
1759 | the text that has been stored by copy_text. */ | |
1760 | if (count_combining_before (GPT_ADDR, insbytes, from, from_byte) | |
1761 | || count_combining_after (GPT_ADDR, insbytes, from, from_byte)) | |
1762 | abort (); | |
1763 | #endif | |
1764 | ||
1765 | GAP_SIZE -= insbytes; | |
1766 | GPT += inschars; | |
1767 | ZV += inschars; | |
1768 | Z += inschars; | |
1769 | GPT_BYTE += insbytes; | |
1770 | ZV_BYTE += insbytes; | |
1771 | Z_BYTE += insbytes; | |
1772 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ | |
1773 | ||
1774 | if (GPT_BYTE < GPT) | |
1775 | abort (); | |
1776 | ||
1777 | /* Adjust the overlay center as needed. This must be done after | |
1778 | adjusting the markers that bound the overlays. */ | |
1779 | if (nchars_del != inschars) | |
1780 | { | |
1781 | adjust_overlays_for_insert (from, inschars); | |
1782 | adjust_overlays_for_delete (from + inschars, nchars_del); | |
1783 | } | |
1784 | ||
1785 | /* Adjust markers for the deletion and the insertion. */ | |
1786 | if (markers | |
7077904e | 1787 | && ! (nchars_del == 1 && inschars == 1 && nbytes_del == insbytes)) |
085db7de RS |
1788 | adjust_markers_for_replace (from, from_byte, nchars_del, nbytes_del, |
1789 | inschars, insbytes); | |
1790 | ||
1791 | offset_intervals (current_buffer, from, inschars - nchars_del); | |
1792 | ||
1793 | /* Relocate point as if it were a marker. */ | |
7077904e KH |
1794 | if (from < PT && (nchars_del != inschars || nbytes_del != insbytes)) |
1795 | { | |
1796 | if (PT < to) | |
1797 | /* PT was within the deleted text. Move it to FROM. */ | |
1798 | adjust_point (from - PT, from_byte - PT_BYTE); | |
1799 | else | |
1800 | adjust_point (inschars - nchars_del, insbytes - nbytes_del); | |
1801 | } | |
085db7de RS |
1802 | |
1803 | if (insbytes == 0) | |
1804 | evaporate_overlays (from); | |
1805 | ||
1806 | CHECK_MARKERS (); | |
1807 | ||
1808 | MODIFF++; | |
3e145152 | 1809 | CHARS_MODIFF = MODIFF; |
085db7de RS |
1810 | } |
1811 | \f | |
b45433b3 | 1812 | /* Delete characters in current buffer |
3be11131 RS |
1813 | from FROM up to (but not including) TO. |
1814 | If TO comes before FROM, we delete nothing. */ | |
b45433b3 | 1815 | |
c660b094 | 1816 | void |
b45433b3 JB |
1817 | del_range (from, to) |
1818 | register int from, to; | |
47c64747 | 1819 | { |
7dae4502 | 1820 | del_range_1 (from, to, 1, 0); |
47c64747 RS |
1821 | } |
1822 | ||
7dae4502 SM |
1823 | /* Like del_range; PREPARE says whether to call prepare_to_modify_buffer. |
1824 | RET_STRING says to return the deleted text. */ | |
47c64747 | 1825 | |
7dae4502 SM |
1826 | Lisp_Object |
1827 | del_range_1 (from, to, prepare, ret_string) | |
1828 | int from, to, prepare, ret_string; | |
b45433b3 | 1829 | { |
3be11131 | 1830 | int from_byte, to_byte; |
7dae4502 SM |
1831 | Lisp_Object deletion; |
1832 | struct gcpro gcpro1; | |
3be11131 RS |
1833 | |
1834 | /* Make args be valid */ | |
1835 | if (from < BEGV) | |
1836 | from = BEGV; | |
1837 | if (to > ZV) | |
1838 | to = ZV; | |
1839 | ||
1840 | if (to <= from) | |
7dae4502 | 1841 | return Qnil; |
3be11131 RS |
1842 | |
1843 | if (prepare) | |
1844 | { | |
1845 | int range_length = to - from; | |
1846 | prepare_to_modify_buffer (from, to, &from); | |
0a411995 | 1847 | to = min (ZV, from + range_length); |
3be11131 RS |
1848 | } |
1849 | ||
1850 | from_byte = CHAR_TO_BYTE (from); | |
1851 | to_byte = CHAR_TO_BYTE (to); | |
1852 | ||
7dae4502 SM |
1853 | deletion = del_range_2 (from, from_byte, to, to_byte, ret_string); |
1854 | GCPRO1(deletion); | |
9c36993a | 1855 | signal_after_change (from, to - from, 0); |
233cc02d | 1856 | update_compositions (from, from, CHECK_HEAD); |
7dae4502 SM |
1857 | UNGCPRO; |
1858 | return deletion; | |
3be11131 RS |
1859 | } |
1860 | ||
1861 | /* Like del_range_1 but args are byte positions, not char positions. */ | |
1862 | ||
1863 | void | |
1864 | del_range_byte (from_byte, to_byte, prepare) | |
1865 | int from_byte, to_byte, prepare; | |
1866 | { | |
1867 | int from, to; | |
1868 | ||
1869 | /* Make args be valid */ | |
1870 | if (from_byte < BEGV_BYTE) | |
1871 | from_byte = BEGV_BYTE; | |
1872 | if (to_byte > ZV_BYTE) | |
1873 | to_byte = ZV_BYTE; | |
1874 | ||
1875 | if (to_byte <= from_byte) | |
1876 | return; | |
1877 | ||
1878 | from = BYTE_TO_CHAR (from_byte); | |
1879 | to = BYTE_TO_CHAR (to_byte); | |
b45433b3 | 1880 | |
d206af14 RS |
1881 | if (prepare) |
1882 | { | |
3be11131 | 1883 | int old_from = from, old_to = Z - to; |
d206af14 RS |
1884 | int range_length = to - from; |
1885 | prepare_to_modify_buffer (from, to, &from); | |
1886 | to = from + range_length; | |
3be11131 RS |
1887 | |
1888 | if (old_from != from) | |
1889 | from_byte = CHAR_TO_BYTE (from); | |
0a411995 GM |
1890 | if (to > ZV) |
1891 | { | |
1892 | to = ZV; | |
1893 | to_byte = ZV_BYTE; | |
1894 | } | |
1895 | else if (old_to == Z - to) | |
3be11131 | 1896 | to_byte = CHAR_TO_BYTE (to); |
d206af14 RS |
1897 | } |
1898 | ||
7dae4502 | 1899 | del_range_2 (from, from_byte, to, to_byte, 0); |
9c36993a | 1900 | signal_after_change (from, to - from, 0); |
0ef71121 | 1901 | update_compositions (from, from, CHECK_HEAD); |
3be11131 RS |
1902 | } |
1903 | ||
1904 | /* Like del_range_1, but positions are specified both as charpos | |
1905 | and bytepos. */ | |
1906 | ||
1907 | void | |
353800c7 KH |
1908 | del_range_both (from, from_byte, to, to_byte, prepare) |
1909 | int from, from_byte, to, to_byte, prepare; | |
3be11131 | 1910 | { |
b45433b3 | 1911 | /* Make args be valid */ |
3be11131 RS |
1912 | if (from_byte < BEGV_BYTE) |
1913 | from_byte = BEGV_BYTE; | |
1914 | if (to_byte > ZV_BYTE) | |
1915 | to_byte = ZV_BYTE; | |
1916 | ||
1917 | if (to_byte <= from_byte) | |
1918 | return; | |
1919 | ||
b45433b3 JB |
1920 | if (from < BEGV) |
1921 | from = BEGV; | |
1922 | if (to > ZV) | |
1923 | to = ZV; | |
1924 | ||
3be11131 RS |
1925 | if (prepare) |
1926 | { | |
1927 | int old_from = from, old_to = Z - to; | |
1928 | int range_length = to - from; | |
1929 | prepare_to_modify_buffer (from, to, &from); | |
1930 | to = from + range_length; | |
1931 | ||
1932 | if (old_from != from) | |
1933 | from_byte = CHAR_TO_BYTE (from); | |
0a411995 GM |
1934 | if (to > ZV) |
1935 | { | |
1936 | to = ZV; | |
1937 | to_byte = ZV_BYTE; | |
1938 | } | |
1939 | else if (old_to == Z - to) | |
3be11131 RS |
1940 | to_byte = CHAR_TO_BYTE (to); |
1941 | } | |
1942 | ||
7dae4502 | 1943 | del_range_2 (from, from_byte, to, to_byte, 0); |
9c36993a | 1944 | signal_after_change (from, to - from, 0); |
0ef71121 | 1945 | update_compositions (from, from, CHECK_HEAD); |
3be11131 RS |
1946 | } |
1947 | ||
1948 | /* Delete a range of text, specified both as character positions | |
1949 | and byte positions. FROM and TO are character positions, | |
7dae4502 SM |
1950 | while FROM_BYTE and TO_BYTE are byte positions. |
1951 | If RET_STRING is true, the deleted area is returned as a string. */ | |
3be11131 | 1952 | |
7dae4502 SM |
1953 | Lisp_Object |
1954 | del_range_2 (from, from_byte, to, to_byte, ret_string) | |
1955 | int from, from_byte, to, to_byte, ret_string; | |
3be11131 RS |
1956 | { |
1957 | register int nbytes_del, nchars_del; | |
628cea90 | 1958 | Lisp_Object deletion; |
3be11131 | 1959 | |
60ea6052 RS |
1960 | CHECK_MARKERS (); |
1961 | ||
3be11131 RS |
1962 | nchars_del = to - from; |
1963 | nbytes_del = to_byte - from_byte; | |
b45433b3 JB |
1964 | |
1965 | /* Make sure the gap is somewhere in or next to what we are deleting. */ | |
1966 | if (from > GPT) | |
3be11131 | 1967 | gap_right (from, from_byte); |
b45433b3 | 1968 | if (to < GPT) |
3be11131 | 1969 | gap_left (to, to_byte, 0); |
b45433b3 | 1970 | |
b16afa45 KH |
1971 | #ifdef BYTE_COMBINING_DEBUG |
1972 | if (count_combining_before (BUF_BYTE_ADDRESS (current_buffer, to_byte), | |
1973 | Z_BYTE - to_byte, from, from_byte)) | |
1974 | abort (); | |
1975 | #endif | |
628cea90 | 1976 | |
7dae4502 | 1977 | if (ret_string || ! EQ (current_buffer->undo_list, Qt)) |
b16afa45 | 1978 | deletion = make_buffer_string_both (from, from_byte, to, to_byte, 1); |
7dae4502 SM |
1979 | else |
1980 | deletion = Qnil; | |
1981 | ||
8948d317 RS |
1982 | /* Relocate all markers pointing into the new, larger gap |
1983 | to point at the end of the text before the gap. | |
3be11131 RS |
1984 | Do this before recording the deletion, |
1985 | so that undo handles this after reinserting the text. */ | |
1986 | adjust_markers_for_delete (from, from_byte, to, to_byte); | |
b16afa45 | 1987 | |
0aa8c4b2 | 1988 | if (! EQ (current_buffer->undo_list, Qt)) |
b16afa45 | 1989 | record_delete (from, deletion); |
be09561e | 1990 | MODIFF++; |
3e145152 | 1991 | CHARS_MODIFF = MODIFF; |
be09561e | 1992 | |
b45433b3 | 1993 | /* Relocate point as if it were a marker. */ |
2bcaed71 | 1994 | if (from < PT) |
3be11131 RS |
1995 | adjust_point (from - (PT < to ? PT : to), |
1996 | from_byte - (PT_BYTE < to_byte ? PT_BYTE : to_byte)); | |
b45433b3 | 1997 | |
3be11131 | 1998 | offset_intervals (current_buffer, from, - nchars_del); |
16032db6 | 1999 | |
adde4858 | 2000 | /* Adjust the overlay center as needed. This must be done after |
a7f38d28 | 2001 | adjusting the markers that bound the overlays. */ |
e3a87305 | 2002 | adjust_overlays_for_delete (from, nchars_del); |
adde4858 | 2003 | |
3be11131 RS |
2004 | GAP_SIZE += nbytes_del; |
2005 | ZV_BYTE -= nbytes_del; | |
2006 | Z_BYTE -= nbytes_del; | |
2007 | ZV -= nchars_del; | |
2008 | Z -= nchars_del; | |
b45433b3 | 2009 | GPT = from; |
3be11131 | 2010 | GPT_BYTE = from_byte; |
017e09ac | 2011 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
e3a87305 | 2012 | |
3be11131 RS |
2013 | if (GPT_BYTE < GPT) |
2014 | abort (); | |
2015 | ||
a50df55b GM |
2016 | if (GPT - BEG < BEG_UNCHANGED) |
2017 | BEG_UNCHANGED = GPT - BEG; | |
2018 | if (Z - GPT < END_UNCHANGED) | |
2019 | END_UNCHANGED = Z - GPT; | |
b45433b3 | 2020 | |
60ea6052 RS |
2021 | CHECK_MARKERS (); |
2022 | ||
d386034e | 2023 | evaporate_overlays (from); |
7dae4502 SM |
2024 | |
2025 | return deletion; | |
b45433b3 JB |
2026 | } |
2027 | \f | |
3be11131 RS |
2028 | /* Call this if you're about to change the region of BUFFER from |
2029 | character positions START to END. This checks the read-only | |
2030 | properties of the region, calls the necessary modification hooks, | |
2031 | and warns the next redisplay that it should pay attention to that | |
3e145152 CY |
2032 | area. |
2033 | ||
2034 | If PRESERVE_CHARS_MODIFF is non-zero, do not update CHARS_MODIFF. | |
2035 | Otherwise set CHARS_MODIFF to the new value of MODIFF. */ | |
3be11131 | 2036 | |
c660b094 | 2037 | void |
3e145152 | 2038 | modify_region (buffer, start, end, preserve_chars_modiff) |
04a759c8 | 2039 | struct buffer *buffer; |
3e145152 | 2040 | int start, end, preserve_chars_modiff; |
b45433b3 | 2041 | { |
04a759c8 JB |
2042 | struct buffer *old_buffer = current_buffer; |
2043 | ||
2044 | if (buffer != old_buffer) | |
2045 | set_buffer_internal (buffer); | |
2046 | ||
d206af14 | 2047 | prepare_to_modify_buffer (start, end, NULL); |
b45433b3 | 2048 | |
a50df55b | 2049 | BUF_COMPUTE_UNCHANGED (buffer, start - 1, end); |
83010cd6 | 2050 | |
9fbf87cd | 2051 | if (MODIFF <= SAVE_MODIFF) |
83010cd6 | 2052 | record_first_change (); |
b45433b3 | 2053 | MODIFF++; |
3e145152 CY |
2054 | if (! preserve_chars_modiff) |
2055 | CHARS_MODIFF = MODIFF; | |
04a759c8 | 2056 | |
069cdc4f RS |
2057 | buffer->point_before_scroll = Qnil; |
2058 | ||
04a759c8 JB |
2059 | if (buffer != old_buffer) |
2060 | set_buffer_internal (old_buffer); | |
b45433b3 | 2061 | } |
d206af14 | 2062 | \f |
3be11131 RS |
2063 | /* Check that it is okay to modify the buffer between START and END, |
2064 | which are char positions. | |
2065 | ||
679194a6 JA |
2066 | Run the before-change-function, if any. If intervals are in use, |
2067 | verify that the text to be modified is not read-only, and call | |
d206af14 RS |
2068 | any modification properties the text may have. |
2069 | ||
2070 | If PRESERVE_PTR is nonzero, we relocate *PRESERVE_PTR | |
2071 | by holding its value temporarily in a marker. */ | |
b45433b3 | 2072 | |
c660b094 | 2073 | void |
d206af14 | 2074 | prepare_to_modify_buffer (start, end, preserve_ptr) |
fb4ee5cd | 2075 | int start, end; |
d206af14 | 2076 | int *preserve_ptr; |
b45433b3 | 2077 | { |
234fb773 CY |
2078 | struct buffer *base_buffer; |
2079 | ||
d427b66a | 2080 | if (!NILP (current_buffer->read_only)) |
b45433b3 JB |
2081 | Fbarf_if_buffer_read_only (); |
2082 | ||
2e9f55fd GM |
2083 | /* Let redisplay consider other windows than selected_window |
2084 | if modifying another buffer. */ | |
2085 | if (XBUFFER (XWINDOW (selected_window)->buffer) != current_buffer) | |
2086 | ++windows_or_buffers_changed; | |
2087 | ||
9fbf87cd | 2088 | if (BUF_INTERVALS (current_buffer) != 0) |
d206af14 RS |
2089 | { |
2090 | if (preserve_ptr) | |
2091 | { | |
2092 | Lisp_Object preserve_marker; | |
2093 | struct gcpro gcpro1; | |
2094 | preserve_marker = Fcopy_marker (make_number (*preserve_ptr), Qnil); | |
2095 | GCPRO1 (preserve_marker); | |
2096 | verify_interval_modification (current_buffer, start, end); | |
2097 | *preserve_ptr = marker_position (preserve_marker); | |
dab0b04d | 2098 | unchain_marker (XMARKER (preserve_marker)); |
d206af14 RS |
2099 | UNGCPRO; |
2100 | } | |
2101 | else | |
2102 | verify_interval_modification (current_buffer, start, end); | |
2103 | } | |
b45433b3 | 2104 | |
234fb773 CY |
2105 | /* For indirect buffers, use the base buffer to check clashes. */ |
2106 | if (current_buffer->base_buffer != 0) | |
2107 | base_buffer = current_buffer->base_buffer; | |
2108 | else | |
2109 | base_buffer = current_buffer; | |
2110 | ||
b45433b3 | 2111 | #ifdef CLASH_DETECTION |
234fb773 | 2112 | if (!NILP (base_buffer->file_truename) |
ab6c5c0c | 2113 | /* Make binding buffer-file-name to nil effective. */ |
234fb773 | 2114 | && !NILP (base_buffer->filename) |
9fbf87cd | 2115 | && SAVE_MODIFF >= MODIFF) |
234fb773 | 2116 | lock_file (base_buffer->file_truename); |
b45433b3 JB |
2117 | #else |
2118 | /* At least warn if this file has changed on disk since it was visited. */ | |
234fb773 | 2119 | if (!NILP (base_buffer->filename) |
9fbf87cd | 2120 | && SAVE_MODIFF >= MODIFF |
d427b66a | 2121 | && NILP (Fverify_visited_file_modtime (Fcurrent_buffer ())) |
234fb773 | 2122 | && !NILP (Ffile_exists_p (base_buffer->filename))) |
b45433b3 | 2123 | call1 (intern ("ask-user-about-supersession-threat"), |
234fb773 | 2124 | base_buffer->filename); |
b45433b3 JB |
2125 | #endif /* not CLASH_DETECTION */ |
2126 | ||
d206af14 | 2127 | signal_before_change (start, end, preserve_ptr); |
2f545eea | 2128 | |
56e1065e JB |
2129 | if (current_buffer->newline_cache) |
2130 | invalidate_region_cache (current_buffer, | |
2131 | current_buffer->newline_cache, | |
2132 | start - BEG, Z - end); | |
2133 | if (current_buffer->width_run_cache) | |
2134 | invalidate_region_cache (current_buffer, | |
2135 | current_buffer->width_run_cache, | |
2136 | start - BEG, Z - end); | |
2137 | ||
2f545eea | 2138 | Vdeactivate_mark = Qt; |
b45433b3 JB |
2139 | } |
2140 | \f | |
d206af14 RS |
2141 | /* These macros work with an argument named `preserve_ptr' |
2142 | and a local variable named `preserve_marker'. */ | |
2143 | ||
2144 | #define PRESERVE_VALUE \ | |
2145 | if (preserve_ptr && NILP (preserve_marker)) \ | |
2146 | preserve_marker = Fcopy_marker (make_number (*preserve_ptr), Qnil) | |
2147 | ||
2148 | #define RESTORE_VALUE \ | |
2149 | if (! NILP (preserve_marker)) \ | |
2150 | { \ | |
2151 | *preserve_ptr = marker_position (preserve_marker); \ | |
dab0b04d | 2152 | unchain_marker (XMARKER (preserve_marker)); \ |
d206af14 RS |
2153 | } |
2154 | ||
b86e0aaf RS |
2155 | #define PRESERVE_START_END \ |
2156 | if (NILP (start_marker)) \ | |
2157 | start_marker = Fcopy_marker (start, Qnil); \ | |
2158 | if (NILP (end_marker)) \ | |
2159 | end_marker = Fcopy_marker (end, Qnil); | |
2160 | ||
2161 | #define FETCH_START \ | |
2162 | (! NILP (start_marker) ? Fmarker_position (start_marker) : start) | |
2163 | ||
2164 | #define FETCH_END \ | |
2165 | (! NILP (end_marker) ? Fmarker_position (end_marker) : end) | |
2166 | ||
4a181359 | 2167 | /* Set a variable to nil if an error occurred. |
e6d3f090 SM |
2168 | Don't change the variable if there was no error. |
2169 | VAL is a cons-cell (VARIABLE . NO-ERROR-FLAG). | |
2170 | VARIABLE is the variable to maybe set to nil. | |
2171 | NO-ERROR-FLAG is nil if there was an error, | |
2172 | anything else meaning no error (so this function does nothing). */ | |
4a181359 SM |
2173 | Lisp_Object |
2174 | reset_var_on_error (val) | |
2175 | Lisp_Object val; | |
2176 | { | |
2177 | if (NILP (XCDR (val))) | |
2178 | Fset (XCAR (val), Qnil); | |
2179 | return Qnil; | |
2180 | } | |
2181 | ||
eb8c3be9 | 2182 | /* Signal a change to the buffer immediately before it happens. |
d206af14 RS |
2183 | START_INT and END_INT are the bounds of the text to be changed. |
2184 | ||
2185 | If PRESERVE_PTR is nonzero, we relocate *PRESERVE_PTR | |
2186 | by holding its value temporarily in a marker. */ | |
b45433b3 | 2187 | |
c660b094 | 2188 | void |
d206af14 | 2189 | signal_before_change (start_int, end_int, preserve_ptr) |
6022d493 | 2190 | int start_int, end_int; |
d206af14 | 2191 | int *preserve_ptr; |
b45433b3 | 2192 | { |
fb4ee5cd | 2193 | Lisp_Object start, end; |
b86e0aaf | 2194 | Lisp_Object start_marker, end_marker; |
d206af14 | 2195 | Lisp_Object preserve_marker; |
b86e0aaf | 2196 | struct gcpro gcpro1, gcpro2, gcpro3; |
4a181359 | 2197 | int count = SPECPDL_INDEX (); |
fb4ee5cd | 2198 | |
fd16a4c6 KH |
2199 | if (inhibit_modification_hooks) |
2200 | return; | |
2201 | ||
fb4ee5cd RS |
2202 | start = make_number (start_int); |
2203 | end = make_number (end_int); | |
d206af14 | 2204 | preserve_marker = Qnil; |
b86e0aaf RS |
2205 | start_marker = Qnil; |
2206 | end_marker = Qnil; | |
2207 | GCPRO3 (preserve_marker, start_marker, end_marker); | |
fb4ee5cd | 2208 | |
4a181359 SM |
2209 | specbind (Qinhibit_modification_hooks, Qt); |
2210 | ||
b45433b3 | 2211 | /* If buffer is unmodified, run a special hook for that case. */ |
9fbf87cd | 2212 | if (SAVE_MODIFF >= MODIFF |
dbc4e1c1 JB |
2213 | && !NILP (Vfirst_change_hook) |
2214 | && !NILP (Vrun_hooks)) | |
d206af14 RS |
2215 | { |
2216 | PRESERVE_VALUE; | |
b86e0aaf | 2217 | PRESERVE_START_END; |
d206af14 RS |
2218 | call1 (Vrun_hooks, Qfirst_change_hook); |
2219 | } | |
dbc4e1c1 | 2220 | |
3d1e2d9c | 2221 | /* Now run the before-change-functions if any. */ |
e45fb8bf RS |
2222 | if (!NILP (Vbefore_change_functions)) |
2223 | { | |
3d1e2d9c | 2224 | Lisp_Object args[3]; |
4a181359 | 2225 | Lisp_Object rvoe_arg = Fcons (Qbefore_change_functions, Qnil); |
3d1e2d9c | 2226 | |
d206af14 | 2227 | PRESERVE_VALUE; |
b86e0aaf | 2228 | PRESERVE_START_END; |
d206af14 | 2229 | |
4a181359 SM |
2230 | /* Mark before-change-functions to be reset to nil in case of error. */ |
2231 | record_unwind_protect (reset_var_on_error, rvoe_arg); | |
3d1e2d9c RS |
2232 | |
2233 | /* Actually run the hook functions. */ | |
2234 | args[0] = Qbefore_change_functions; | |
b86e0aaf RS |
2235 | args[1] = FETCH_START; |
2236 | args[2] = FETCH_END; | |
4a181359 | 2237 | Frun_hook_with_args (3, args); |
3d1e2d9c | 2238 | |
4a181359 SM |
2239 | /* There was no error: unarm the reset_on_error. */ |
2240 | XSETCDR (rvoe_arg, Qt); | |
e45fb8bf | 2241 | } |
d07c0804 | 2242 | |
fbebdf81 | 2243 | if (current_buffer->overlays_before || current_buffer->overlays_after) |
d206af14 RS |
2244 | { |
2245 | PRESERVE_VALUE; | |
b86e0aaf RS |
2246 | report_overlay_modification (FETCH_START, FETCH_END, 0, |
2247 | FETCH_START, FETCH_END, Qnil); | |
d206af14 RS |
2248 | } |
2249 | ||
b86e0aaf RS |
2250 | if (! NILP (start_marker)) |
2251 | free_marker (start_marker); | |
2252 | if (! NILP (end_marker)) | |
2253 | free_marker (end_marker); | |
d206af14 RS |
2254 | RESTORE_VALUE; |
2255 | UNGCPRO; | |
4a181359 SM |
2256 | |
2257 | unbind_to (count, Qnil); | |
b45433b3 JB |
2258 | } |
2259 | ||
eb8c3be9 | 2260 | /* Signal a change immediately after it happens. |
3be11131 | 2261 | CHARPOS is the character position of the start of the changed text. |
b45433b3 JB |
2262 | LENDEL is the number of characters of the text before the change. |
2263 | (Not the whole buffer; just the part that was changed.) | |
8b09e5d0 RS |
2264 | LENINS is the number of characters in that part of the text |
2265 | after the change. */ | |
b45433b3 | 2266 | |
c660b094 | 2267 | void |
3be11131 RS |
2268 | signal_after_change (charpos, lendel, lenins) |
2269 | int charpos, lendel, lenins; | |
b45433b3 | 2270 | { |
4a181359 | 2271 | int count = SPECPDL_INDEX (); |
fd16a4c6 KH |
2272 | if (inhibit_modification_hooks) |
2273 | return; | |
2274 | ||
fb2e7d14 RS |
2275 | /* If we are deferring calls to the after-change functions |
2276 | and there are no before-change functions, | |
2277 | just record the args that we were going to use. */ | |
2278 | if (! NILP (Vcombine_after_change_calls) | |
1675d086 | 2279 | && NILP (Vbefore_change_functions) |
fbebdf81 SM |
2280 | && !current_buffer->overlays_before |
2281 | && !current_buffer->overlays_after) | |
fb2e7d14 RS |
2282 | { |
2283 | Lisp_Object elt; | |
2284 | ||
2285 | if (!NILP (combine_after_change_list) | |
2286 | && current_buffer != XBUFFER (combine_after_change_buffer)) | |
2287 | Fcombine_after_change_execute (); | |
2288 | ||
3be11131 RS |
2289 | elt = Fcons (make_number (charpos - BEG), |
2290 | Fcons (make_number (Z - (charpos - lendel + lenins)), | |
fb2e7d14 RS |
2291 | Fcons (make_number (lenins - lendel), Qnil))); |
2292 | combine_after_change_list | |
2293 | = Fcons (elt, combine_after_change_list); | |
2294 | combine_after_change_buffer = Fcurrent_buffer (); | |
2295 | ||
2296 | return; | |
2297 | } | |
2298 | ||
177c0ea7 | 2299 | if (!NILP (combine_after_change_list)) |
fb2e7d14 RS |
2300 | Fcombine_after_change_execute (); |
2301 | ||
4a181359 SM |
2302 | specbind (Qinhibit_modification_hooks, Qt); |
2303 | ||
e45fb8bf RS |
2304 | if (!NILP (Vafter_change_functions)) |
2305 | { | |
3d1e2d9c | 2306 | Lisp_Object args[4]; |
4a181359 SM |
2307 | Lisp_Object rvoe_arg = Fcons (Qafter_change_functions, Qnil); |
2308 | ||
2309 | /* Mark after-change-functions to be reset to nil in case of error. */ | |
2310 | record_unwind_protect (reset_var_on_error, rvoe_arg); | |
3d1e2d9c RS |
2311 | |
2312 | /* Actually run the hook functions. */ | |
2313 | args[0] = Qafter_change_functions; | |
3be11131 RS |
2314 | XSETFASTINT (args[1], charpos); |
2315 | XSETFASTINT (args[2], charpos + lenins); | |
3d1e2d9c | 2316 | XSETFASTINT (args[3], lendel); |
4a181359 | 2317 | Frun_hook_with_args (4, args); |
3d1e2d9c | 2318 | |
4a181359 SM |
2319 | /* There was no error: unarm the reset_on_error. */ |
2320 | XSETCDR (rvoe_arg, Qt); | |
e45fb8bf | 2321 | } |
d07c0804 | 2322 | |
fbebdf81 | 2323 | if (current_buffer->overlays_before || current_buffer->overlays_after) |
3be11131 RS |
2324 | report_overlay_modification (make_number (charpos), |
2325 | make_number (charpos + lenins), | |
d07c0804 | 2326 | 1, |
3be11131 RS |
2327 | make_number (charpos), |
2328 | make_number (charpos + lenins), | |
d07c0804 | 2329 | make_number (lendel)); |
c5ca0786 RS |
2330 | |
2331 | /* After an insertion, call the text properties | |
2332 | insert-behind-hooks or insert-in-front-hooks. */ | |
2333 | if (lendel == 0) | |
d6b81c0f AS |
2334 | report_interval_modification (make_number (charpos), |
2335 | make_number (charpos + lenins)); | |
4a181359 SM |
2336 | |
2337 | unbind_to (count, Qnil); | |
b45433b3 | 2338 | } |
fb2e7d14 RS |
2339 | |
2340 | Lisp_Object | |
2341 | Fcombine_after_change_execute_1 (val) | |
2342 | Lisp_Object val; | |
2343 | { | |
2344 | Vcombine_after_change_calls = val; | |
2345 | return val; | |
2346 | } | |
2347 | ||
2348 | DEFUN ("combine-after-change-execute", Fcombine_after_change_execute, | |
335c5470 PJ |
2349 | Scombine_after_change_execute, 0, 0, 0, |
2350 | doc: /* This function is for use internally in `combine-after-change-calls'. */) | |
2351 | () | |
fb2e7d14 | 2352 | { |
aed13378 | 2353 | int count = SPECPDL_INDEX (); |
fb2e7d14 RS |
2354 | int beg, end, change; |
2355 | int begpos, endpos; | |
2356 | Lisp_Object tail; | |
2357 | ||
101e446f KH |
2358 | if (NILP (combine_after_change_list)) |
2359 | return Qnil; | |
2360 | ||
c47a9ed1 CY |
2361 | /* It is rare for combine_after_change_buffer to be invalid, but |
2362 | possible. It can happen when combine-after-change-calls is | |
2363 | non-nil, and insertion calls a file handler (e.g. through | |
2364 | lock_file) which scribbles into a temp file -- cyd */ | |
2365 | if (!BUFFERP (combine_after_change_buffer) | |
2366 | || NILP (XBUFFER (combine_after_change_buffer)->name)) | |
2367 | { | |
2368 | combine_after_change_list = Qnil; | |
2369 | return Qnil; | |
2370 | } | |
2371 | ||
fb2e7d14 RS |
2372 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); |
2373 | ||
2374 | Fset_buffer (combine_after_change_buffer); | |
2375 | ||
2376 | /* # chars unchanged at beginning of buffer. */ | |
2377 | beg = Z - BEG; | |
2378 | /* # chars unchanged at end of buffer. */ | |
2379 | end = beg; | |
2380 | /* Total amount of insertion (negative for deletion). */ | |
2381 | change = 0; | |
2382 | ||
2383 | /* Scan the various individual changes, | |
2384 | accumulating the range info in BEG, END and CHANGE. */ | |
2385 | for (tail = combine_after_change_list; CONSP (tail); | |
03699b14 | 2386 | tail = XCDR (tail)) |
fb2e7d14 | 2387 | { |
e688a080 KH |
2388 | Lisp_Object elt; |
2389 | int thisbeg, thisend, thischange; | |
fb2e7d14 RS |
2390 | |
2391 | /* Extract the info from the next element. */ | |
03699b14 | 2392 | elt = XCAR (tail); |
fb2e7d14 RS |
2393 | if (! CONSP (elt)) |
2394 | continue; | |
03699b14 | 2395 | thisbeg = XINT (XCAR (elt)); |
fb2e7d14 | 2396 | |
03699b14 | 2397 | elt = XCDR (elt); |
fb2e7d14 RS |
2398 | if (! CONSP (elt)) |
2399 | continue; | |
03699b14 | 2400 | thisend = XINT (XCAR (elt)); |
fb2e7d14 | 2401 | |
03699b14 | 2402 | elt = XCDR (elt); |
fb2e7d14 RS |
2403 | if (! CONSP (elt)) |
2404 | continue; | |
03699b14 | 2405 | thischange = XINT (XCAR (elt)); |
fb2e7d14 RS |
2406 | |
2407 | /* Merge this range into the accumulated range. */ | |
2408 | change += thischange; | |
2409 | if (thisbeg < beg) | |
2410 | beg = thisbeg; | |
2411 | if (thisend < end) | |
2412 | end = thisend; | |
2413 | } | |
2414 | ||
2415 | /* Get the current start and end positions of the range | |
2416 | that was changed. */ | |
2417 | begpos = BEG + beg; | |
2418 | endpos = Z - end; | |
177c0ea7 | 2419 | |
fb2e7d14 RS |
2420 | /* We are about to handle these, so discard them. */ |
2421 | combine_after_change_list = Qnil; | |
2422 | ||
2423 | /* Now run the after-change functions for real. | |
2424 | Turn off the flag that defers them. */ | |
2425 | record_unwind_protect (Fcombine_after_change_execute_1, | |
2426 | Vcombine_after_change_calls); | |
2427 | signal_after_change (begpos, endpos - begpos - change, endpos - begpos); | |
0ef71121 | 2428 | update_compositions (begpos, endpos, CHECK_ALL); |
fb2e7d14 | 2429 | |
101e446f | 2430 | return unbind_to (count, Qnil); |
fb2e7d14 RS |
2431 | } |
2432 | \f | |
dfcf069d | 2433 | void |
fb2e7d14 RS |
2434 | syms_of_insdel () |
2435 | { | |
2436 | staticpro (&combine_after_change_list); | |
bf0bf758 | 2437 | staticpro (&combine_after_change_buffer); |
fb2e7d14 | 2438 | combine_after_change_list = Qnil; |
101e446f | 2439 | combine_after_change_buffer = Qnil; |
fb2e7d14 | 2440 | |
60ea6052 | 2441 | DEFVAR_BOOL ("check-markers-debug-flag", &check_markers_debug_flag, |
335c5470 | 2442 | doc: /* Non-nil means enable debugging checks for invalid marker positions. */); |
60ea6052 | 2443 | check_markers_debug_flag = 0; |
fb2e7d14 | 2444 | DEFVAR_LISP ("combine-after-change-calls", &Vcombine_after_change_calls, |
335c5470 | 2445 | doc: /* Used internally by the `combine-after-change-calls' macro. */); |
fb2e7d14 RS |
2446 | Vcombine_after_change_calls = Qnil; |
2447 | ||
7baf49cf | 2448 | DEFVAR_BOOL ("inhibit-modification-hooks", &inhibit_modification_hooks, |
335c5470 PJ |
2449 | doc: /* Non-nil means don't run any of the hooks that respond to buffer changes. |
2450 | This affects `before-change-functions' and `after-change-functions', | |
2451 | as well as hooks attached to text properties and overlays. */); | |
7baf49cf | 2452 | inhibit_modification_hooks = 0; |
27ea0af2 GM |
2453 | Qinhibit_modification_hooks = intern ("inhibit-modification-hooks"); |
2454 | staticpro (&Qinhibit_modification_hooks); | |
7baf49cf | 2455 | |
fb2e7d14 RS |
2456 | defsubr (&Scombine_after_change_execute); |
2457 | } | |
6b61353c KH |
2458 | |
2459 | /* arch-tag: 9b34b886-47d7-465e-a234-299af411b23d | |
2460 | (do not change this comment) */ |