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, |
114f9c96 | 3 | 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 |
8cabe764 | 4 | Free Software Foundation, Inc. |
b45433b3 JB |
5 | |
6 | This file is part of GNU Emacs. | |
7 | ||
9ec0b715 | 8 | GNU Emacs is free software: you can redistribute it and/or modify |
b45433b3 | 9 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
10 | the Free Software Foundation, either version 3 of the License, or |
11 | (at your option) any later version. | |
b45433b3 JB |
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 | |
9ec0b715 | 19 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
b45433b3 JB |
20 | |
21 | ||
18160b98 | 22 | #include <config.h> |
d7306fe6 | 23 | #include <setjmp.h> |
b45433b3 | 24 | #include "lisp.h" |
679194a6 | 25 | #include "intervals.h" |
b45433b3 | 26 | #include "buffer.h" |
811f7370 | 27 | #include "character.h" |
b45433b3 | 28 | #include "window.h" |
d014bf88 | 29 | #include "blockinput.h" |
dfcf069d | 30 | #include "region-cache.h" |
b45433b3 | 31 | |
d206af14 RS |
32 | #ifndef NULL |
33 | #define NULL 0 | |
34 | #endif | |
35 | ||
ae19ba7c SM |
36 | static void insert_from_string_1 (Lisp_Object string, |
37 | EMACS_INT pos, EMACS_INT pos_byte, | |
38 | EMACS_INT nchars, EMACS_INT nbytes, | |
39 | int inherit, int before_markers); | |
40 | static void insert_from_buffer_1 (struct buffer *buf, | |
41 | EMACS_INT from, EMACS_INT nchars, | |
42 | int inherit); | |
43 | static void gap_left (EMACS_INT charpos, EMACS_INT bytepos, int newgap); | |
44 | static void gap_right (EMACS_INT charpos, EMACS_INT bytepos); | |
45 | static void adjust_markers_gap_motion (EMACS_INT from, EMACS_INT to, | |
46 | EMACS_INT amount); | |
47 | static void adjust_markers_for_insert (EMACS_INT from, EMACS_INT from_byte, | |
48 | EMACS_INT to, EMACS_INT to_byte, | |
49 | int before_markers); | |
50 | static void adjust_markers_for_replace (EMACS_INT, EMACS_INT, EMACS_INT, | |
51 | EMACS_INT, EMACS_INT, EMACS_INT); | |
52 | static void adjust_point (EMACS_INT nchars, EMACS_INT nbytes); | |
395ec62e | 53 | |
971de7fb | 54 | Lisp_Object Fcombine_after_change_execute (void); |
fb2e7d14 RS |
55 | |
56 | /* Non-nil means don't call the after-change-functions right away, | |
ce5b453a | 57 | just record an element in combine_after_change_list. */ |
fb2e7d14 RS |
58 | Lisp_Object Vcombine_after_change_calls; |
59 | ||
60 | /* List of elements of the form (BEG-UNCHANGED END-UNCHANGED CHANGE-AMOUNT) | |
61 | describing changes which happened while combine_after_change_calls | |
62 | was nonzero. We use this to decide how to call them | |
63 | once the deferral ends. | |
64 | ||
65 | In each element. | |
66 | BEG-UNCHANGED is the number of chars before the changed range. | |
67 | END-UNCHANGED is the number of chars after the changed range, | |
68 | and CHANGE-AMOUNT is the number of characters inserted by the change | |
69 | (negative for a deletion). */ | |
70 | Lisp_Object combine_after_change_list; | |
71 | ||
72 | /* Buffer which combine_after_change_list is about. */ | |
73 | Lisp_Object combine_after_change_buffer; | |
27ea0af2 GM |
74 | |
75 | Lisp_Object Qinhibit_modification_hooks; | |
76 | ||
7c23dd44 | 77 | extern Lisp_Object Vselect_active_regions, Vsaved_region_selection, Qonly; |
9852377f | 78 | |
2b083808 | 79 | \f |
60ea6052 RS |
80 | /* Check all markers in the current buffer, looking for something invalid. */ |
81 | ||
82 | static int check_markers_debug_flag; | |
83 | ||
84 | #define CHECK_MARKERS() \ | |
85 | if (check_markers_debug_flag) \ | |
86 | check_markers (); \ | |
87 | else | |
88 | ||
89 | void | |
971de7fb | 90 | check_markers (void) |
60ea6052 | 91 | { |
dab0b04d | 92 | register struct Lisp_Marker *tail; |
9f3ede3c | 93 | int multibyte = ! NILP (current_buffer->enable_multibyte_characters); |
60ea6052 | 94 | |
dab0b04d | 95 | for (tail = BUF_MARKERS (current_buffer); tail; tail = tail->next) |
60ea6052 | 96 | { |
dab0b04d | 97 | if (tail->buffer->text != current_buffer->text) |
60ea6052 | 98 | abort (); |
dab0b04d | 99 | if (tail->charpos > Z) |
60ea6052 | 100 | abort (); |
dab0b04d | 101 | if (tail->bytepos > Z_BYTE) |
60ea6052 | 102 | abort (); |
dab0b04d | 103 | if (multibyte && ! CHAR_HEAD_P (FETCH_BYTE (tail->bytepos))) |
9f3ede3c | 104 | abort (); |
60ea6052 RS |
105 | } |
106 | } | |
107 | \f | |
3be11131 | 108 | /* Move gap to position CHARPOS. |
b45433b3 JB |
109 | Note that this can quit! */ |
110 | ||
c660b094 | 111 | void |
ae19ba7c | 112 | move_gap (EMACS_INT charpos) |
b45433b3 | 113 | { |
3be11131 | 114 | move_gap_both (charpos, charpos_to_bytepos (charpos)); |
b45433b3 JB |
115 | } |
116 | ||
3be11131 RS |
117 | /* Move gap to byte position BYTEPOS, which is also char position CHARPOS. |
118 | Note that this can quit! */ | |
119 | ||
120 | void | |
ae19ba7c | 121 | move_gap_both (EMACS_INT charpos, EMACS_INT bytepos) |
3be11131 RS |
122 | { |
123 | if (bytepos < GPT_BYTE) | |
124 | gap_left (charpos, bytepos, 0); | |
125 | else if (bytepos > GPT_BYTE) | |
126 | gap_right (charpos, bytepos); | |
127 | } | |
128 | ||
129 | /* Move the gap to a position less than the current GPT. | |
130 | BYTEPOS describes the new position as a byte position, | |
131 | and CHARPOS is the corresponding char position. | |
b45433b3 JB |
132 | If NEWGAP is nonzero, then don't update beg_unchanged and end_unchanged. */ |
133 | ||
2bcaed71 | 134 | static void |
ae19ba7c | 135 | gap_left (EMACS_INT charpos, EMACS_INT bytepos, int newgap) |
b45433b3 JB |
136 | { |
137 | register unsigned char *to, *from; | |
ae19ba7c SM |
138 | register EMACS_INT i; |
139 | EMACS_INT new_s1; | |
b45433b3 | 140 | |
b45433b3 | 141 | if (!newgap) |
a50df55b | 142 | BUF_COMPUTE_UNCHANGED (current_buffer, charpos, GPT); |
b45433b3 | 143 | |
3be11131 | 144 | i = GPT_BYTE; |
b45433b3 JB |
145 | to = GAP_END_ADDR; |
146 | from = GPT_ADDR; | |
3be11131 | 147 | new_s1 = GPT_BYTE; |
b45433b3 JB |
148 | |
149 | /* Now copy the characters. To move the gap down, | |
150 | copy characters up. */ | |
151 | ||
152 | while (1) | |
153 | { | |
154 | /* I gets number of characters left to copy. */ | |
3be11131 | 155 | i = new_s1 - bytepos; |
b45433b3 JB |
156 | if (i == 0) |
157 | break; | |
158 | /* If a quit is requested, stop copying now. | |
3be11131 | 159 | Change BYTEPOS to be where we have actually moved the gap to. */ |
b45433b3 JB |
160 | if (QUITP) |
161 | { | |
3be11131 RS |
162 | bytepos = new_s1; |
163 | charpos = BYTE_TO_CHAR (bytepos); | |
b45433b3 JB |
164 | break; |
165 | } | |
166 | /* Move at most 32000 chars before checking again for a quit. */ | |
167 | if (i > 32000) | |
168 | i = 32000; | |
72af86bd AS |
169 | new_s1 -= i; |
170 | from -= i, to -= i; | |
171 | memmove (to, from, i); | |
b45433b3 JB |
172 | } |
173 | ||
3be11131 RS |
174 | /* Adjust markers, and buffer data structure, to put the gap at BYTEPOS. |
175 | BYTEPOS is where the loop above stopped, which may be what was specified | |
b45433b3 | 176 | or may be where a quit was detected. */ |
3be11131 RS |
177 | adjust_markers_gap_motion (bytepos, GPT_BYTE, GAP_SIZE); |
178 | GPT_BYTE = bytepos; | |
179 | GPT = charpos; | |
180 | if (bytepos < charpos) | |
181 | abort (); | |
469ff680 | 182 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
b45433b3 JB |
183 | QUIT; |
184 | } | |
185 | ||
2b34df4e | 186 | /* Move the gap to a position greater than the current GPT. |
3be11131 RS |
187 | BYTEPOS describes the new position as a byte position, |
188 | and CHARPOS is the corresponding char position. */ | |
189 | ||
2bcaed71 | 190 | static void |
ae19ba7c | 191 | gap_right (EMACS_INT charpos, EMACS_INT bytepos) |
b45433b3 JB |
192 | { |
193 | register unsigned char *to, *from; | |
ae19ba7c SM |
194 | register EMACS_INT i; |
195 | EMACS_INT new_s1; | |
b45433b3 | 196 | |
a50df55b | 197 | BUF_COMPUTE_UNCHANGED (current_buffer, charpos, GPT); |
b45433b3 | 198 | |
3be11131 | 199 | i = GPT_BYTE; |
b45433b3 JB |
200 | from = GAP_END_ADDR; |
201 | to = GPT_ADDR; | |
3be11131 | 202 | new_s1 = GPT_BYTE; |
b45433b3 JB |
203 | |
204 | /* Now copy the characters. To move the gap up, | |
205 | copy characters down. */ | |
206 | ||
207 | while (1) | |
208 | { | |
209 | /* I gets number of characters left to copy. */ | |
3be11131 | 210 | i = bytepos - new_s1; |
b45433b3 JB |
211 | if (i == 0) |
212 | break; | |
213 | /* If a quit is requested, stop copying now. | |
3be11131 | 214 | Change BYTEPOS to be where we have actually moved the gap to. */ |
b45433b3 JB |
215 | if (QUITP) |
216 | { | |
3be11131 RS |
217 | bytepos = new_s1; |
218 | charpos = BYTE_TO_CHAR (bytepos); | |
b45433b3 JB |
219 | break; |
220 | } | |
221 | /* Move at most 32000 chars before checking again for a quit. */ | |
222 | if (i > 32000) | |
223 | i = 32000; | |
72af86bd AS |
224 | new_s1 += i; |
225 | memmove (to, from, i); | |
226 | from += i, to += i; | |
b45433b3 JB |
227 | } |
228 | ||
3be11131 RS |
229 | adjust_markers_gap_motion (GPT_BYTE + GAP_SIZE, bytepos + GAP_SIZE, |
230 | - GAP_SIZE); | |
231 | GPT = charpos; | |
232 | GPT_BYTE = bytepos; | |
233 | if (bytepos < charpos) | |
234 | abort (); | |
469ff680 | 235 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
b45433b3 JB |
236 | QUIT; |
237 | } | |
2b083808 | 238 | \f |
3be11131 RS |
239 | /* Add AMOUNT to the byte position of every marker in the current buffer |
240 | whose current byte position is between FROM (exclusive) and TO (inclusive). | |
8948d317 | 241 | |
b45433b3 JB |
242 | Also, any markers past the outside of that interval, in the direction |
243 | of adjustment, are first moved back to the near end of the interval | |
8948d317 RS |
244 | and then adjusted by AMOUNT. |
245 | ||
246 | When the latter adjustment is done, if AMOUNT is negative, | |
247 | we record the adjustment for undo. (This case happens only for | |
3be11131 RS |
248 | deletion.) |
249 | ||
250 | The markers' character positions are not altered, | |
251 | because gap motion does not affect character positions. */ | |
252 | ||
253 | int adjust_markers_test; | |
b45433b3 | 254 | |
2bcaed71 | 255 | static void |
ae19ba7c | 256 | adjust_markers_gap_motion (EMACS_INT from, EMACS_INT to, EMACS_INT amount) |
b45433b3 | 257 | { |
80f6e77c RS |
258 | /* Now that a marker has a bytepos, not counting the gap, |
259 | nothing needs to be done here. */ | |
260 | #if 0 | |
b45433b3 JB |
261 | Lisp_Object marker; |
262 | register struct Lisp_Marker *m; | |
ae19ba7c | 263 | register EMACS_INT mpos; |
b45433b3 | 264 | |
9fbf87cd | 265 | marker = BUF_MARKERS (current_buffer); |
b45433b3 | 266 | |
d427b66a | 267 | while (!NILP (marker)) |
b45433b3 JB |
268 | { |
269 | m = XMARKER (marker); | |
80f6e77c | 270 | mpos = m->bytepos; |
b45433b3 JB |
271 | if (amount > 0) |
272 | { | |
273 | if (mpos > to && mpos < to + amount) | |
3be11131 RS |
274 | { |
275 | if (adjust_markers_test) | |
276 | abort (); | |
277 | mpos = to + amount; | |
278 | } | |
b45433b3 JB |
279 | } |
280 | else | |
281 | { | |
8948d317 RS |
282 | /* Here's the case where a marker is inside text being deleted. |
283 | AMOUNT can be negative for gap motion, too, | |
284 | but then this range contains no markers. */ | |
b45433b3 | 285 | if (mpos > from + amount && mpos <= from) |
8948d317 | 286 | { |
3be11131 RS |
287 | if (adjust_markers_test) |
288 | abort (); | |
289 | mpos = from + amount; | |
8948d317 | 290 | } |
b45433b3 JB |
291 | } |
292 | if (mpos > from && mpos <= to) | |
293 | mpos += amount; | |
294 | m->bufpos = mpos; | |
295 | marker = m->chain; | |
296 | } | |
80f6e77c | 297 | #endif |
b45433b3 | 298 | } |
2b083808 | 299 | \f |
3be11131 RS |
300 | /* Adjust all markers for a deletion |
301 | whose range in bytes is FROM_BYTE to TO_BYTE. | |
302 | The range in charpos is FROM to TO. | |
303 | ||
304 | This function assumes that the gap is adjacent to | |
305 | or inside of the range being deleted. */ | |
beecb55b | 306 | |
809f3d51 | 307 | void |
ae19ba7c SM |
308 | adjust_markers_for_delete (EMACS_INT from, EMACS_INT from_byte, |
309 | EMACS_INT to, EMACS_INT to_byte) | |
3be11131 RS |
310 | { |
311 | Lisp_Object marker; | |
312 | register struct Lisp_Marker *m; | |
ae19ba7c | 313 | register EMACS_INT charpos; |
3be11131 | 314 | |
dab0b04d | 315 | for (m = BUF_MARKERS (current_buffer); m; m = m->next) |
3be11131 | 316 | { |
3be11131 RS |
317 | charpos = m->charpos; |
318 | ||
319 | if (charpos > Z) | |
320 | abort (); | |
321 | ||
322 | /* If the marker is after the deletion, | |
80f6e77c | 323 | relocate by number of chars / bytes deleted. */ |
3be11131 | 324 | if (charpos > to) |
80f6e77c RS |
325 | { |
326 | m->charpos -= to - from; | |
327 | m->bytepos -= to_byte - from_byte; | |
328 | } | |
80f6e77c | 329 | /* Here's the case where a marker is inside text being deleted. */ |
3be11131 RS |
330 | else if (charpos > from) |
331 | { | |
00de2987 | 332 | if (! m->insertion_type) |
dab0b04d | 333 | { /* Normal markers will end up at the beginning of the |
00de2987 | 334 | re-inserted text after undoing a deletion, and must be |
177c0ea7 | 335 | adjusted to move them to the correct place. */ |
dab0b04d | 336 | XSETMISC (marker, m); |
28259cac | 337 | record_marker_adjustment (marker, from - charpos); |
dab0b04d | 338 | } |
00de2987 | 339 | else if (charpos < to) |
dab0b04d | 340 | { /* Before-insertion markers will automatically move forward |
00de2987 MB |
341 | upon re-inserting the deleted text, so we have to arrange |
342 | for them to move backward to the correct position. */ | |
dab0b04d | 343 | XSETMISC (marker, m); |
28259cac | 344 | record_marker_adjustment (marker, to - charpos); |
dab0b04d | 345 | } |
3be11131 | 346 | m->charpos = from; |
80f6e77c | 347 | m->bytepos = from_byte; |
3be11131 | 348 | } |
00de2987 MB |
349 | /* Here's the case where a before-insertion marker is immediately |
350 | before the deleted region. */ | |
351 | else if (charpos == from && m->insertion_type) | |
352 | { | |
353 | /* Undoing the change uses normal insertion, which will | |
354 | incorrectly make MARKER move forward, so we arrange for it | |
355 | to then move backward to the correct place at the beginning | |
356 | of the deleted region. */ | |
dab0b04d | 357 | XSETMISC (marker, m); |
00de2987 MB |
358 | record_marker_adjustment (marker, to - from); |
359 | } | |
3be11131 RS |
360 | } |
361 | } | |
23b20a70 | 362 | |
2b083808 | 363 | \f |
432f78d2 RS |
364 | /* Adjust markers for an insertion that stretches from FROM / FROM_BYTE |
365 | to TO / TO_BYTE. We have to relocate the charpos of every marker | |
366 | that points after the insertion (but not their bytepos). | |
3be11131 | 367 | |
3be11131 RS |
368 | When a marker points at the insertion point, |
369 | we advance it if either its insertion-type is t | |
370 | or BEFORE_MARKERS is true. */ | |
371 | ||
372 | static void | |
ae19ba7c SM |
373 | adjust_markers_for_insert (EMACS_INT from, EMACS_INT from_byte, |
374 | EMACS_INT to, EMACS_INT to_byte, int before_markers) | |
beecb55b | 375 | { |
dab0b04d | 376 | struct Lisp_Marker *m; |
469ff680 | 377 | int adjusted = 0; |
ae19ba7c SM |
378 | EMACS_INT nchars = to - from; |
379 | EMACS_INT nbytes = to_byte - from_byte; | |
beecb55b | 380 | |
dab0b04d | 381 | for (m = BUF_MARKERS (current_buffer); m; m = m->next) |
beecb55b | 382 | { |
86a56ef3 SM |
383 | eassert (m->bytepos >= m->charpos |
384 | && m->bytepos - m->charpos <= Z_BYTE - Z); | |
1f90a790 | 385 | |
432f78d2 | 386 | if (m->bytepos == from_byte) |
469ff680 | 387 | { |
432f78d2 RS |
388 | if (m->insertion_type || before_markers) |
389 | { | |
b16afa45 KH |
390 | m->bytepos = to_byte; |
391 | m->charpos = to; | |
432f78d2 RS |
392 | if (m->insertion_type) |
393 | adjusted = 1; | |
394 | } | |
ce97a2d7 | 395 | } |
80f6e77c RS |
396 | else if (m->bytepos > from_byte) |
397 | { | |
398 | m->bytepos += nbytes; | |
b16afa45 | 399 | m->charpos += nchars; |
80f6e77c | 400 | } |
beecb55b | 401 | } |
3be11131 RS |
402 | |
403 | /* Adjusting only markers whose insertion-type is t may result in | |
409f2919 | 404 | - disordered start and end in overlays, and |
6b61353c | 405 | - disordered overlays in the slot `overlays_before' of current_buffer. */ |
469ff680 | 406 | if (adjusted) |
6b61353c KH |
407 | { |
408 | fix_start_end_in_overlays(from, to); | |
409 | fix_overlays_before (current_buffer, from, to); | |
410 | } | |
beecb55b RS |
411 | } |
412 | ||
3be11131 RS |
413 | /* Adjust point for an insertion of NBYTES bytes, which are NCHARS characters. |
414 | ||
415 | This is used only when the value of point changes due to an insert | |
416 | or delete; it does not represent a conceptual change in point as a | |
417 | marker. In particular, point is not crossing any interval | |
418 | boundaries, so there's no need to use the usual SET_PT macro. In | |
419 | fact it would be incorrect to do so, because either the old or the | |
420 | new value of point is out of sync with the current set of | |
421 | intervals. */ | |
422 | ||
a27a38d8 | 423 | static void |
ae19ba7c | 424 | adjust_point (EMACS_INT nchars, EMACS_INT nbytes) |
a27a38d8 | 425 | { |
3be11131 RS |
426 | BUF_PT (current_buffer) += nchars; |
427 | BUF_PT_BYTE (current_buffer) += nbytes; | |
428 | ||
429 | /* In a single-byte buffer, the two positions must be equal. */ | |
86a56ef3 | 430 | eassert (PT_BYTE >= PT && PT_BYTE - PT <= ZV_BYTE - ZV); |
a27a38d8 | 431 | } |
b45433b3 | 432 | \f |
652838b5 KH |
433 | /* Adjust markers for a replacement of a text at FROM (FROM_BYTE) of |
434 | length OLD_CHARS (OLD_BYTES) to a new text of length NEW_CHARS | |
adee4f91 KH |
435 | (NEW_BYTES). It is assumed that OLD_CHARS > 0, i.e., this is not |
436 | an insertion. */ | |
652838b5 KH |
437 | |
438 | static void | |
ae19ba7c SM |
439 | adjust_markers_for_replace (EMACS_INT from, EMACS_INT from_byte, |
440 | EMACS_INT old_chars, EMACS_INT old_bytes, | |
441 | EMACS_INT new_chars, EMACS_INT new_bytes) | |
652838b5 | 442 | { |
dab0b04d | 443 | register struct Lisp_Marker *m; |
ae19ba7c SM |
444 | EMACS_INT prev_to_byte = from_byte + old_bytes; |
445 | EMACS_INT diff_chars = new_chars - old_chars; | |
446 | EMACS_INT diff_bytes = new_bytes - old_bytes; | |
652838b5 | 447 | |
dab0b04d | 448 | for (m = BUF_MARKERS (current_buffer); m; m = m->next) |
652838b5 | 449 | { |
adee4f91 | 450 | if (m->bytepos >= prev_to_byte) |
652838b5 | 451 | { |
adee4f91 KH |
452 | m->charpos += diff_chars; |
453 | m->bytepos += diff_bytes; | |
652838b5 | 454 | } |
adee4f91 | 455 | else if (m->bytepos > from_byte) |
652838b5 | 456 | { |
652838b5 | 457 | m->charpos = from; |
b16afa45 | 458 | m->bytepos = from_byte; |
652838b5 | 459 | } |
652838b5 | 460 | } |
3019692c KH |
461 | |
462 | CHECK_MARKERS (); | |
652838b5 KH |
463 | } |
464 | ||
465 | \f | |
3be11131 | 466 | /* Make the gap NBYTES_ADDED bytes longer. */ |
b45433b3 | 467 | |
c660b094 | 468 | void |
ae19ba7c | 469 | make_gap_larger (EMACS_INT nbytes_added) |
b45433b3 | 470 | { |
b45433b3 | 471 | Lisp_Object tem; |
ae19ba7c SM |
472 | EMACS_INT real_gap_loc; |
473 | EMACS_INT real_gap_loc_byte; | |
474 | EMACS_INT old_gap_size; | |
b45433b3 JB |
475 | |
476 | /* If we have to get more space, get enough to last a while. */ | |
3be11131 | 477 | nbytes_added += 2000; |
b45433b3 | 478 | |
87e32266 SM |
479 | { EMACS_INT total_size = Z_BYTE - BEG_BYTE + GAP_SIZE + nbytes_added; |
480 | if (total_size < 0 | |
481 | /* Don't allow a buffer size that won't fit in a Lisp integer. */ | |
482 | || total_size != XINT (make_number (total_size)) | |
483 | /* Don't allow a buffer size that won't fit in an int | |
484 | even if it will fit in a Lisp integer. | |
485 | That won't work because so many places still use `int'. */ | |
486 | || total_size != (EMACS_INT) (int) total_size) | |
487 | error ("Buffer exceeds maximum size"); | |
488 | } | |
94056516 | 489 | |
71a7bfa7 | 490 | enlarge_buffer_text (current_buffer, nbytes_added); |
b45433b3 JB |
491 | |
492 | /* Prevent quitting in move_gap. */ | |
493 | tem = Vinhibit_quit; | |
494 | Vinhibit_quit = Qt; | |
495 | ||
496 | real_gap_loc = GPT; | |
3be11131 | 497 | real_gap_loc_byte = GPT_BYTE; |
b45433b3 JB |
498 | old_gap_size = GAP_SIZE; |
499 | ||
500 | /* Call the newly allocated space a gap at the end of the whole space. */ | |
501 | GPT = Z + GAP_SIZE; | |
7d92db58 | 502 | GPT_BYTE = Z_BYTE + GAP_SIZE; |
3be11131 | 503 | GAP_SIZE = nbytes_added; |
b45433b3 JB |
504 | |
505 | /* Move the new gap down to be consecutive with the end of the old one. | |
506 | This adjusts the markers properly too. */ | |
3be11131 | 507 | gap_left (real_gap_loc + old_gap_size, real_gap_loc_byte + old_gap_size, 1); |
b45433b3 JB |
508 | |
509 | /* Now combine the two into one large gap. */ | |
510 | GAP_SIZE += old_gap_size; | |
511 | GPT = real_gap_loc; | |
3be11131 | 512 | GPT_BYTE = real_gap_loc_byte; |
b45433b3 | 513 | |
469ff680 KH |
514 | /* Put an anchor. */ |
515 | *(Z_ADDR) = 0; | |
516 | ||
b45433b3 JB |
517 | Vinhibit_quit = tem; |
518 | } | |
8af5b8e7 AI |
519 | |
520 | ||
7273faa1 | 521 | /* Make the gap NBYTES_REMOVED bytes shorter. */ |
8af5b8e7 AI |
522 | |
523 | void | |
ae19ba7c | 524 | make_gap_smaller (EMACS_INT nbytes_removed) |
8af5b8e7 AI |
525 | { |
526 | Lisp_Object tem; | |
ae19ba7c SM |
527 | EMACS_INT real_gap_loc; |
528 | EMACS_INT real_gap_loc_byte; | |
529 | EMACS_INT real_Z; | |
530 | EMACS_INT real_Z_byte; | |
531 | EMACS_INT real_beg_unchanged; | |
532 | EMACS_INT new_gap_size; | |
8af5b8e7 AI |
533 | |
534 | /* Make sure the gap is at least 20 bytes. */ | |
535 | if (GAP_SIZE - nbytes_removed < 20) | |
536 | nbytes_removed = GAP_SIZE - 20; | |
537 | ||
538 | /* Prevent quitting in move_gap. */ | |
539 | tem = Vinhibit_quit; | |
540 | Vinhibit_quit = Qt; | |
541 | ||
542 | real_gap_loc = GPT; | |
543 | real_gap_loc_byte = GPT_BYTE; | |
73df3b72 | 544 | new_gap_size = GAP_SIZE - nbytes_removed; |
8af5b8e7 AI |
545 | real_Z = Z; |
546 | real_Z_byte = Z_BYTE; | |
73df3b72 | 547 | real_beg_unchanged = BEG_UNCHANGED; |
8af5b8e7 AI |
548 | |
549 | /* Pretend that the last unwanted part of the gap is the entire gap, | |
550 | and that the first desired part of the gap is part of the buffer | |
551 | text. */ | |
72af86bd | 552 | memset (GPT_ADDR, 0, new_gap_size); |
73df3b72 KS |
553 | GPT += new_gap_size; |
554 | GPT_BYTE += new_gap_size; | |
555 | Z += new_gap_size; | |
556 | Z_BYTE += new_gap_size; | |
8af5b8e7 AI |
557 | GAP_SIZE = nbytes_removed; |
558 | ||
559 | /* Move the unwanted pretend gap to the end of the buffer. This | |
560 | adjusts the markers properly too. */ | |
561 | gap_right (Z, Z_BYTE); | |
562 | ||
563 | enlarge_buffer_text (current_buffer, -nbytes_removed); | |
564 | ||
565 | /* Now restore the desired gap. */ | |
73df3b72 | 566 | GAP_SIZE = new_gap_size; |
8af5b8e7 AI |
567 | GPT = real_gap_loc; |
568 | GPT_BYTE = real_gap_loc_byte; | |
569 | Z = real_Z; | |
570 | Z_BYTE = real_Z_byte; | |
73df3b72 | 571 | BEG_UNCHANGED = real_beg_unchanged; |
8af5b8e7 AI |
572 | |
573 | /* Put an anchor. */ | |
574 | *(Z_ADDR) = 0; | |
575 | ||
576 | Vinhibit_quit = tem; | |
577 | } | |
578 | ||
579 | void | |
ae19ba7c | 580 | make_gap (EMACS_INT nbytes_added) |
8af5b8e7 AI |
581 | { |
582 | if (nbytes_added >= 0) | |
583 | make_gap_larger (nbytes_added); | |
d77fbc16 | 584 | #if defined USE_MMAP_FOR_BUFFERS || defined REL_ALLOC || defined DOUG_LEA_MALLOC |
8af5b8e7 AI |
585 | else |
586 | make_gap_smaller (-nbytes_added); | |
587 | #endif | |
588 | } | |
b45433b3 | 589 | \f |
2b083808 RS |
590 | /* Copy NBYTES bytes of text from FROM_ADDR to TO_ADDR. |
591 | FROM_MULTIBYTE says whether the incoming text is multibyte. | |
592 | TO_MULTIBYTE says whether to store the text as multibyte. | |
593 | If FROM_MULTIBYTE != TO_MULTIBYTE, we convert. | |
594 | ||
595 | Return the number of bytes stored at TO_ADDR. */ | |
596 | ||
ae19ba7c SM |
597 | EMACS_INT |
598 | copy_text (const unsigned char *from_addr, unsigned char *to_addr, | |
599 | EMACS_INT nbytes, int from_multibyte, int to_multibyte) | |
2b083808 RS |
600 | { |
601 | if (from_multibyte == to_multibyte) | |
602 | { | |
72af86bd | 603 | memcpy (to_addr, from_addr, nbytes); |
2b083808 RS |
604 | return nbytes; |
605 | } | |
606 | else if (from_multibyte) | |
607 | { | |
ae19ba7c SM |
608 | EMACS_INT nchars = 0; |
609 | EMACS_INT bytes_left = nbytes; | |
6021f7c5 | 610 | Lisp_Object tbl = Qnil; |
f44cbcd8 | 611 | |
2b083808 RS |
612 | while (bytes_left > 0) |
613 | { | |
b16afa45 | 614 | int thislen, c; |
62a6e103 | 615 | c = STRING_CHAR_AND_LENGTH (from_addr, thislen); |
1ede3eb6 KH |
616 | if (! ASCII_CHAR_P (c)) |
617 | c &= 0xFF; | |
f44cbcd8 | 618 | *to_addr++ = c; |
2b083808 | 619 | from_addr += thislen; |
7e79b8e0 | 620 | bytes_left -= thislen; |
2b083808 RS |
621 | nchars++; |
622 | } | |
623 | return nchars; | |
624 | } | |
625 | else | |
626 | { | |
627 | unsigned char *initial_to_addr = to_addr; | |
628 | ||
629 | /* Convert single-byte to multibyte. */ | |
630 | while (nbytes > 0) | |
631 | { | |
632 | int c = *from_addr++; | |
2b083808 | 633 | |
4c0354d7 | 634 | if (!ASCII_CHAR_P (c)) |
2b083808 | 635 | { |
4c0354d7 | 636 | c = BYTE8_TO_CHAR (c); |
0ef71121 | 637 | to_addr += CHAR_STRING (c, to_addr); |
2b083808 RS |
638 | nbytes--; |
639 | } | |
640 | else | |
641 | /* Special case for speed. */ | |
642 | *to_addr++ = c, nbytes--; | |
643 | } | |
644 | return to_addr - initial_to_addr; | |
645 | } | |
646 | } | |
647 | ||
648 | /* Return the number of bytes it would take | |
649 | to convert some single-byte text to multibyte. | |
650 | The single-byte text consists of NBYTES bytes at PTR. */ | |
651 | ||
ae19ba7c SM |
652 | EMACS_INT |
653 | count_size_as_multibyte (const unsigned char *ptr, EMACS_INT nbytes) | |
2b083808 | 654 | { |
ae19ba7c SM |
655 | EMACS_INT i; |
656 | EMACS_INT outgoing_nbytes = 0; | |
2b083808 RS |
657 | |
658 | for (i = 0; i < nbytes; i++) | |
659 | { | |
660 | unsigned int c = *ptr++; | |
59a52d50 | 661 | |
4c0354d7 | 662 | if (ASCII_CHAR_P (c)) |
59a52d50 KH |
663 | outgoing_nbytes++; |
664 | else | |
2b083808 | 665 | { |
4c0354d7 | 666 | c = BYTE8_TO_CHAR (c); |
643044eb | 667 | outgoing_nbytes += CHAR_BYTES (c); |
2b083808 | 668 | } |
2b083808 RS |
669 | } |
670 | ||
671 | return outgoing_nbytes; | |
672 | } | |
673 | \f | |
b45433b3 | 674 | /* Insert a string of specified length before point. |
2b083808 RS |
675 | This function judges multibyteness based on |
676 | enable_multibyte_characters in the current buffer; | |
677 | it never converts between single-byte and multibyte. | |
678 | ||
ef29f213 KH |
679 | DO NOT use this for the contents of a Lisp string or a Lisp buffer! |
680 | prepare_to_modify_buffer could relocate the text. */ | |
b45433b3 | 681 | |
c660b094 | 682 | void |
ae19ba7c | 683 | insert (const unsigned char *string, EMACS_INT nbytes) |
b45433b3 | 684 | { |
3be11131 | 685 | if (nbytes > 0) |
395ec62e | 686 | { |
ae19ba7c | 687 | EMACS_INT len = chars_in_text (string, nbytes), opoint; |
bab3eee1 EZ |
688 | insert_1_both (string, len, nbytes, 0, 1, 0); |
689 | opoint = PT - len; | |
690 | signal_after_change (opoint, 0, len); | |
0ef71121 | 691 | update_compositions (opoint, PT, CHECK_BORDER); |
cd11ef31 RS |
692 | } |
693 | } | |
694 | ||
2b083808 RS |
695 | /* Likewise, but inherit text properties from neighboring characters. */ |
696 | ||
c660b094 | 697 | void |
ae19ba7c | 698 | insert_and_inherit (const unsigned char *string, EMACS_INT nbytes) |
cd11ef31 | 699 | { |
3be11131 | 700 | if (nbytes > 0) |
cd11ef31 | 701 | { |
ae19ba7c | 702 | EMACS_INT len = chars_in_text (string, nbytes), opoint; |
bab3eee1 EZ |
703 | insert_1_both (string, len, nbytes, 1, 1, 0); |
704 | opoint = PT - len; | |
705 | signal_after_change (opoint, 0, len); | |
0ef71121 | 706 | update_compositions (opoint, PT, CHECK_BORDER); |
395ec62e KH |
707 | } |
708 | } | |
b45433b3 | 709 | |
2b083808 | 710 | /* Insert the character C before point. Do not inherit text properties. */ |
3be11131 | 711 | |
c660b094 | 712 | void |
ae19ba7c | 713 | insert_char (int c) |
3be11131 | 714 | { |
0ef71121 | 715 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
2b083808 RS |
716 | int len; |
717 | ||
718 | if (! NILP (current_buffer->enable_multibyte_characters)) | |
0ef71121 | 719 | len = CHAR_STRING (c, str); |
2b083808 RS |
720 | else |
721 | { | |
722 | len = 1; | |
0ef71121 | 723 | str[0] = c; |
2b083808 | 724 | } |
3be11131 RS |
725 | |
726 | insert (str, len); | |
727 | } | |
728 | ||
2b083808 | 729 | /* Insert the null-terminated string S before point. */ |
3be11131 RS |
730 | |
731 | void | |
ae19ba7c | 732 | insert_string (const char *s) |
3be11131 RS |
733 | { |
734 | insert (s, strlen (s)); | |
735 | } | |
736 | ||
737 | /* Like `insert' except that all markers pointing at the place where | |
738 | the insertion happens are adjusted to point after it. | |
739 | Don't use this function to insert part of a Lisp string, | |
740 | since gc could happen and relocate it. */ | |
741 | ||
742 | void | |
ae19ba7c | 743 | insert_before_markers (const unsigned char *string, EMACS_INT nbytes) |
3be11131 RS |
744 | { |
745 | if (nbytes > 0) | |
746 | { | |
ae19ba7c | 747 | EMACS_INT len = chars_in_text (string, nbytes), opoint; |
bab3eee1 EZ |
748 | insert_1_both (string, len, nbytes, 0, 1, 1); |
749 | opoint = PT - len; | |
750 | signal_after_change (opoint, 0, len); | |
0ef71121 | 751 | update_compositions (opoint, PT, CHECK_BORDER); |
3be11131 RS |
752 | } |
753 | } | |
754 | ||
2b083808 RS |
755 | /* Likewise, but inherit text properties from neighboring characters. */ |
756 | ||
3be11131 | 757 | void |
ae19ba7c SM |
758 | insert_before_markers_and_inherit (const unsigned char *string, |
759 | EMACS_INT nbytes) | |
3be11131 RS |
760 | { |
761 | if (nbytes > 0) | |
762 | { | |
ae19ba7c | 763 | EMACS_INT len = chars_in_text (string, nbytes), opoint; |
bab3eee1 EZ |
764 | insert_1_both (string, len, nbytes, 1, 1, 1); |
765 | opoint = PT - len; | |
766 | signal_after_change (opoint, 0, len); | |
0ef71121 | 767 | update_compositions (opoint, PT, CHECK_BORDER); |
3be11131 RS |
768 | } |
769 | } | |
1f90a790 | 770 | |
3be11131 RS |
771 | /* Subroutine used by the insert functions above. */ |
772 | ||
773 | void | |
ae19ba7c SM |
774 | insert_1 (const unsigned char *string, EMACS_INT nbytes, |
775 | int inherit, int prepare, int before_markers) | |
395ec62e | 776 | { |
432f78d2 RS |
777 | insert_1_both (string, chars_in_text (string, nbytes), nbytes, |
778 | inherit, prepare, before_markers); | |
779 | } | |
b16afa45 | 780 | |
1f90a790 | 781 | \f |
b16afa45 KH |
782 | #ifdef BYTE_COMBINING_DEBUG |
783 | ||
432f78d2 RS |
784 | /* See if the bytes before POS/POS_BYTE combine with bytes |
785 | at the start of STRING to form a single character. | |
ce97a2d7 | 786 | If so, return the number of bytes at the start of STRING |
432f78d2 | 787 | which combine in this way. Otherwise, return 0. */ |
b45433b3 | 788 | |
432f78d2 | 789 | int |
ae19ba7c SM |
790 | count_combining_before (const unsigned char *string, EMACS_INT length, |
791 | EMACS_INT pos, EMACS_INT pos_byte) | |
432f78d2 | 792 | { |
cae184f2 | 793 | int len, combining_bytes; |
641a26d2 | 794 | const unsigned char *p; |
b45433b3 | 795 | |
432f78d2 RS |
796 | if (NILP (current_buffer->enable_multibyte_characters)) |
797 | return 0; | |
cae184f2 KH |
798 | |
799 | /* At first, we can exclude the following cases: | |
800 | (1) STRING[0] can't be a following byte of multibyte sequence. | |
801 | (2) POS is the start of the current buffer. | |
802 | (3) A character before POS is not a multibyte character. */ | |
803 | if (length == 0 || CHAR_HEAD_P (*string)) /* case (1) */ | |
432f78d2 | 804 | return 0; |
cae184f2 | 805 | if (pos_byte == BEG_BYTE) /* case (2) */ |
432f78d2 | 806 | return 0; |
cae184f2 KH |
807 | len = 1; |
808 | p = BYTE_POS_ADDR (pos_byte - 1); | |
809 | while (! CHAR_HEAD_P (*p)) p--, len++; | |
409f2919 | 810 | if (! LEADING_CODE_P (*p)) /* case (3) */ |
432f78d2 | 811 | return 0; |
cae184f2 | 812 | |
cae184f2 KH |
813 | combining_bytes = BYTES_BY_CHAR_HEAD (*p) - len; |
814 | if (combining_bytes <= 0) | |
815 | /* The character preceding POS is, complete and no room for | |
816 | combining bytes (combining_bytes == 0), or an independent 8-bit | |
817 | character (combining_bytes < 0). */ | |
432f78d2 | 818 | return 0; |
ce97a2d7 | 819 | |
cae184f2 KH |
820 | /* We have a combination situation. Count the bytes at STRING that |
821 | may combine. */ | |
822 | p = string + 1; | |
ce97a2d7 RS |
823 | while (!CHAR_HEAD_P (*p) && p < string + length) |
824 | p++; | |
825 | ||
cae184f2 | 826 | return (combining_bytes < p - string ? combining_bytes : p - string); |
432f78d2 | 827 | } |
b45433b3 | 828 | |
432f78d2 RS |
829 | /* See if the bytes after POS/POS_BYTE combine with bytes |
830 | at the end of STRING to form a single character. | |
831 | If so, return the number of bytes after POS/POS_BYTE | |
832 | which combine in this way. Otherwise, return 0. */ | |
679194a6 | 833 | |
432f78d2 | 834 | int |
ae19ba7c SM |
835 | count_combining_after (const unsigned char *string, |
836 | EMACS_INT length, EMACS_INT pos, EMACS_INT pos_byte) | |
432f78d2 | 837 | { |
ae19ba7c SM |
838 | EMACS_INT opos_byte = pos_byte; |
839 | EMACS_INT i; | |
840 | EMACS_INT bytes; | |
cae184f2 | 841 | unsigned char *bufp; |
3be11131 | 842 | |
432f78d2 RS |
843 | if (NILP (current_buffer->enable_multibyte_characters)) |
844 | return 0; | |
cae184f2 KH |
845 | |
846 | /* At first, we can exclude the following cases: | |
847 | (1) The last byte of STRING is an ASCII. | |
848 | (2) POS is the last of the current buffer. | |
849 | (3) A character at POS can't be a following byte of multibyte | |
850 | character. */ | |
851 | if (length > 0 && ASCII_BYTE_P (string[length - 1])) /* case (1) */ | |
852 | return 0; | |
853 | if (pos_byte == Z_BYTE) /* case (2) */ | |
432f78d2 | 854 | return 0; |
cae184f2 KH |
855 | bufp = BYTE_POS_ADDR (pos_byte); |
856 | if (CHAR_HEAD_P (*bufp)) /* case (3) */ | |
857 | return 0; | |
858 | ||
432f78d2 | 859 | i = length - 1; |
b57a7b0b | 860 | while (i >= 0 && ! CHAR_HEAD_P (string[i])) |
432f78d2 RS |
861 | { |
862 | i--; | |
863 | } | |
b57a7b0b KH |
864 | if (i < 0) |
865 | { | |
cae184f2 KH |
866 | /* All characters in STRING are not character head. We must |
867 | check also preceding bytes at POS. We are sure that the gap | |
868 | is at POS. */ | |
869 | unsigned char *p = BEG_ADDR; | |
b57a7b0b | 870 | i = pos_byte - 2; |
cae184f2 | 871 | while (i >= 0 && ! CHAR_HEAD_P (p[i])) |
b57a7b0b | 872 | i--; |
409f2919 | 873 | if (i < 0 || !LEADING_CODE_P (p[i])) |
b57a7b0b | 874 | return 0; |
0ef71121 | 875 | |
cae184f2 KH |
876 | bytes = BYTES_BY_CHAR_HEAD (p[i]); |
877 | return (bytes <= pos_byte - 1 - i + length | |
878 | ? 0 | |
879 | : bytes - (pos_byte - 1 - i + length)); | |
b57a7b0b | 880 | } |
409f2919 | 881 | if (!LEADING_CODE_P (string[i])) |
432f78d2 RS |
882 | return 0; |
883 | ||
cae184f2 KH |
884 | bytes = BYTES_BY_CHAR_HEAD (string[i]) - (length - i); |
885 | bufp++, pos_byte++; | |
886 | while (!CHAR_HEAD_P (*bufp)) bufp++, pos_byte++; | |
cd11ef31 | 887 | |
cae184f2 | 888 | return (bytes <= pos_byte - opos_byte ? bytes : pos_byte - opos_byte); |
b45433b3 | 889 | } |
2b083808 | 890 | |
b16afa45 | 891 | #endif |
9f3ede3c | 892 | |
1f90a790 | 893 | \f |
2b083808 RS |
894 | /* Insert a sequence of NCHARS chars which occupy NBYTES bytes |
895 | starting at STRING. INHERIT, PREPARE and BEFORE_MARKERS | |
896 | are the same as in insert_1. */ | |
897 | ||
898 | void | |
ae19ba7c SM |
899 | insert_1_both (const unsigned char *string, |
900 | EMACS_INT nchars, EMACS_INT nbytes, | |
901 | int inherit, int prepare, int before_markers) | |
2b083808 | 902 | { |
da80a8d5 GM |
903 | if (nchars == 0) |
904 | return; | |
177c0ea7 | 905 | |
57404188 KH |
906 | if (NILP (current_buffer->enable_multibyte_characters)) |
907 | nchars = nbytes; | |
908 | ||
35d63725 RS |
909 | if (prepare) |
910 | /* Do this before moving and increasing the gap, | |
911 | because the before-change hooks might move the gap | |
912 | or make it smaller. */ | |
913 | prepare_to_modify_buffer (PT, PT, NULL); | |
914 | ||
2b083808 RS |
915 | if (PT != GPT) |
916 | move_gap_both (PT, PT_BYTE); | |
917 | if (GAP_SIZE < nbytes) | |
918 | make_gap (nbytes - GAP_SIZE); | |
919 | ||
b16afa45 KH |
920 | #ifdef BYTE_COMBINING_DEBUG |
921 | if (count_combining_before (string, nbytes, PT, PT_BYTE) | |
922 | || count_combining_after (string, nbytes, PT, PT_BYTE)) | |
923 | abort (); | |
924 | #endif | |
432f78d2 RS |
925 | |
926 | /* Record deletion of the surrounding text that combines with | |
927 | the insertion. This, together with recording the insertion, | |
b16afa45 KH |
928 | will add up to the right stuff in the undo list. */ |
929 | record_insert (PT, nchars); | |
2b083808 | 930 | MODIFF++; |
3e145152 | 931 | CHARS_MODIFF = MODIFF; |
2b083808 | 932 | |
72af86bd | 933 | memcpy (GPT_ADDR, string, nbytes); |
2b083808 | 934 | |
2b083808 | 935 | GAP_SIZE -= nbytes; |
1f90a790 RS |
936 | GPT += nchars; |
937 | ZV += nchars; | |
938 | Z += nchars; | |
2b083808 RS |
939 | GPT_BYTE += nbytes; |
940 | ZV_BYTE += nbytes; | |
941 | Z_BYTE += nbytes; | |
942 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ | |
1f90a790 | 943 | |
1f90a790 RS |
944 | if (GPT_BYTE < GPT) |
945 | abort (); | |
946 | ||
9dde4e0c KS |
947 | /* The insert may have been in the unchanged region, so check again. */ |
948 | if (Z - GPT < END_UNCHANGED) | |
949 | END_UNCHANGED = Z - GPT; | |
950 | ||
1f90a790 | 951 | adjust_overlays_for_insert (PT, nchars); |
432f78d2 | 952 | adjust_markers_for_insert (PT, PT_BYTE, |
1f90a790 | 953 | PT + nchars, PT_BYTE + nbytes, |
2b083808 | 954 | before_markers); |
ce97a2d7 | 955 | |
1f90a790 | 956 | if (BUF_INTERVALS (current_buffer) != 0) |
1f90a790 RS |
957 | offset_intervals (current_buffer, PT, nchars); |
958 | ||
ce97a2d7 | 959 | if (!inherit && BUF_INTERVALS (current_buffer) != 0) |
f2cab2ea GM |
960 | set_text_properties (make_number (PT), make_number (PT + nchars), |
961 | Qnil, Qnil, Qnil); | |
ce97a2d7 | 962 | |
b16afa45 | 963 | adjust_point (nchars, nbytes); |
828f1ed3 KH |
964 | |
965 | CHECK_MARKERS (); | |
2b083808 | 966 | } |
3be11131 | 967 | \f |
679194a6 | 968 | /* Insert the part of the text of STRING, a Lisp object assumed to be |
2b083808 RS |
969 | of type string, consisting of the LENGTH characters (LENGTH_BYTE bytes) |
970 | starting at position POS / POS_BYTE. If the text of STRING has properties, | |
971 | copy them into the buffer. | |
679194a6 JA |
972 | |
973 | It does not work to use `insert' for this, because a GC could happen | |
72af86bd | 974 | before we copy the stuff into the buffer, and relocate the string |
7e1ea612 | 975 | without insert noticing. */ |
679194a6 | 976 | |
c660b094 | 977 | void |
ae19ba7c SM |
978 | insert_from_string (Lisp_Object string, EMACS_INT pos, EMACS_INT pos_byte, |
979 | EMACS_INT length, EMACS_INT length_byte, int inherit) | |
395ec62e | 980 | { |
ae19ba7c | 981 | EMACS_INT opoint = PT; |
d8bf4256 RS |
982 | |
983 | if (SCHARS (string) == 0) | |
984 | return; | |
985 | ||
62b82678 RS |
986 | insert_from_string_1 (string, pos, pos_byte, length, length_byte, |
987 | inherit, 0); | |
988 | signal_after_change (opoint, 0, PT - opoint); | |
0ef71121 | 989 | update_compositions (opoint, PT, CHECK_BORDER); |
395ec62e KH |
990 | } |
991 | ||
2b083808 RS |
992 | /* Like `insert_from_string' except that all markers pointing |
993 | at the place where the insertion happens are adjusted to point after it. */ | |
3be11131 RS |
994 | |
995 | void | |
ae19ba7c SM |
996 | insert_from_string_before_markers (Lisp_Object string, |
997 | EMACS_INT pos, EMACS_INT pos_byte, | |
998 | EMACS_INT length, EMACS_INT length_byte, | |
999 | int inherit) | |
3be11131 | 1000 | { |
ae19ba7c | 1001 | EMACS_INT opoint = PT; |
d8bf4256 RS |
1002 | |
1003 | if (SCHARS (string) == 0) | |
1004 | return; | |
1005 | ||
62b82678 RS |
1006 | insert_from_string_1 (string, pos, pos_byte, length, length_byte, |
1007 | inherit, 1); | |
1008 | signal_after_change (opoint, 0, PT - opoint); | |
0ef71121 | 1009 | update_compositions (opoint, PT, CHECK_BORDER); |
3be11131 RS |
1010 | } |
1011 | ||
1012 | /* Subroutine of the insertion functions above. */ | |
1013 | ||
1014 | static void | |
ae19ba7c SM |
1015 | insert_from_string_1 (Lisp_Object string, EMACS_INT pos, EMACS_INT pos_byte, |
1016 | EMACS_INT nchars, EMACS_INT nbytes, | |
1017 | int inherit, int before_markers) | |
b45433b3 | 1018 | { |
b45433b3 | 1019 | struct gcpro gcpro1; |
ae19ba7c | 1020 | EMACS_INT outgoing_nbytes = nbytes; |
ce97a2d7 | 1021 | INTERVAL intervals; |
2b083808 RS |
1022 | |
1023 | /* Make OUTGOING_NBYTES describe the text | |
1024 | as it will be inserted in this buffer. */ | |
1025 | ||
1026 | if (NILP (current_buffer->enable_multibyte_characters)) | |
1027 | outgoing_nbytes = nchars; | |
2a1d8be0 | 1028 | else if (! STRING_MULTIBYTE (string)) |
2b083808 | 1029 | outgoing_nbytes |
f7e233a8 | 1030 | = count_size_as_multibyte (SDATA (string) + pos_byte, |
2b083808 | 1031 | nbytes); |
b45433b3 | 1032 | |
b45433b3 | 1033 | GCPRO1 (string); |
35d63725 RS |
1034 | /* Do this before moving and increasing the gap, |
1035 | because the before-change hooks might move the gap | |
1036 | or make it smaller. */ | |
d206af14 | 1037 | prepare_to_modify_buffer (PT, PT, NULL); |
b45433b3 | 1038 | |
2bcaed71 | 1039 | if (PT != GPT) |
3be11131 | 1040 | move_gap_both (PT, PT_BYTE); |
534b9840 | 1041 | if (GAP_SIZE < outgoing_nbytes) |
2b083808 | 1042 | make_gap (outgoing_nbytes - GAP_SIZE); |
b45433b3 JB |
1043 | UNGCPRO; |
1044 | ||
2b083808 RS |
1045 | /* Copy the string text into the buffer, perhaps converting |
1046 | between single-byte and multibyte. */ | |
d5db4077 | 1047 | copy_text (SDATA (string) + pos_byte, GPT_ADDR, nbytes, |
2a1d8be0 | 1048 | STRING_MULTIBYTE (string), |
2b083808 | 1049 | ! NILP (current_buffer->enable_multibyte_characters)); |
b45433b3 | 1050 | |
b16afa45 | 1051 | #ifdef BYTE_COMBINING_DEBUG |
432f78d2 RS |
1052 | /* We have copied text into the gap, but we have not altered |
1053 | PT or PT_BYTE yet. So we can pass PT and PT_BYTE | |
1054 | to these functions and get the same results as we would | |
1055 | have got earlier on. Meanwhile, PT_ADDR does point to | |
1056 | the text that has been stored by copy_text. */ | |
b16afa45 KH |
1057 | if (count_combining_before (GPT_ADDR, outgoing_nbytes, PT, PT_BYTE) |
1058 | || count_combining_after (GPT_ADDR, outgoing_nbytes, PT, PT_BYTE)) | |
1059 | abort (); | |
1060 | #endif | |
432f78d2 | 1061 | |
b16afa45 | 1062 | record_insert (PT, nchars); |
432f78d2 | 1063 | MODIFF++; |
3e145152 | 1064 | CHARS_MODIFF = MODIFF; |
432f78d2 | 1065 | |
7792090e | 1066 | GAP_SIZE -= outgoing_nbytes; |
1f90a790 RS |
1067 | GPT += nchars; |
1068 | ZV += nchars; | |
1069 | Z += nchars; | |
2b083808 RS |
1070 | GPT_BYTE += outgoing_nbytes; |
1071 | ZV_BYTE += outgoing_nbytes; | |
1072 | Z_BYTE += outgoing_nbytes; | |
469ff680 | 1073 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
3be11131 RS |
1074 | |
1075 | if (GPT_BYTE < GPT) | |
1076 | abort (); | |
679194a6 | 1077 | |
9dde4e0c KS |
1078 | /* The insert may have been in the unchanged region, so check again. */ |
1079 | if (Z - GPT < END_UNCHANGED) | |
1080 | END_UNCHANGED = Z - GPT; | |
1081 | ||
1f90a790 RS |
1082 | adjust_overlays_for_insert (PT, nchars); |
1083 | adjust_markers_for_insert (PT, PT_BYTE, PT + nchars, | |
1084 | PT_BYTE + outgoing_nbytes, | |
1f90a790 | 1085 | before_markers); |
ce97a2d7 | 1086 | |
1f90a790 RS |
1087 | offset_intervals (current_buffer, PT, nchars); |
1088 | ||
d5db4077 | 1089 | intervals = STRING_INTERVALS (string); |
b16afa45 | 1090 | /* Get the intervals for the part of the string we are inserting. */ |
d5db4077 | 1091 | if (nbytes < SBYTES (string)) |
1f90a790 | 1092 | intervals = copy_intervals (intervals, pos, nchars); |
177c0ea7 | 1093 | |
ce97a2d7 | 1094 | /* Insert those intervals. */ |
1f90a790 | 1095 | graft_intervals_into_buffer (intervals, PT, nchars, |
9391e591 | 1096 | current_buffer, inherit); |
ce97a2d7 | 1097 | |
b16afa45 | 1098 | adjust_point (nchars, outgoing_nbytes); |
8f924df7 KH |
1099 | |
1100 | CHECK_MARKERS (); | |
1101 | } | |
1102 | \f | |
1103 | /* Insert a sequence of NCHARS chars which occupy NBYTES bytes | |
1104 | starting at GPT_ADDR. */ | |
1105 | ||
1106 | void | |
ae19ba7c | 1107 | insert_from_gap (EMACS_INT nchars, EMACS_INT nbytes) |
8f924df7 KH |
1108 | { |
1109 | if (NILP (current_buffer->enable_multibyte_characters)) | |
1110 | nchars = nbytes; | |
1111 | ||
1112 | record_insert (GPT, nchars); | |
1113 | MODIFF++; | |
1114 | ||
1115 | GAP_SIZE -= nbytes; | |
1116 | GPT += nchars; | |
1117 | ZV += nchars; | |
1118 | Z += nchars; | |
1119 | GPT_BYTE += nbytes; | |
1120 | ZV_BYTE += nbytes; | |
1121 | Z_BYTE += nbytes; | |
1122 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ | |
1123 | ||
1124 | if (GPT_BYTE < GPT) | |
1125 | abort (); | |
1126 | ||
c669988b KH |
1127 | adjust_overlays_for_insert (GPT - nchars, nchars); |
1128 | adjust_markers_for_insert (GPT - nchars, GPT_BYTE - nbytes, | |
1129 | GPT, GPT_BYTE, 0); | |
8f924df7 KH |
1130 | |
1131 | if (BUF_INTERVALS (current_buffer) != 0) | |
c669988b KH |
1132 | { |
1133 | offset_intervals (current_buffer, GPT - nchars, nchars); | |
1134 | graft_intervals_into_buffer (NULL_INTERVAL, GPT - nchars, nchars, | |
1135 | current_buffer, 0); | |
1136 | } | |
8f924df7 KH |
1137 | |
1138 | if (GPT - nchars < PT) | |
1139 | adjust_point (nchars, nbytes); | |
1140 | ||
1141 | CHECK_MARKERS (); | |
b45433b3 | 1142 | } |
3be11131 RS |
1143 | \f |
1144 | /* Insert text from BUF, NCHARS characters starting at CHARPOS, into the | |
ef29f213 KH |
1145 | current buffer. If the text in BUF has properties, they are absorbed |
1146 | into the current buffer. | |
1147 | ||
1148 | It does not work to use `insert' for this, because a malloc could happen | |
72af86bd | 1149 | and relocate BUF's text before the copy happens. */ |
ef29f213 KH |
1150 | |
1151 | void | |
ae19ba7c SM |
1152 | insert_from_buffer (struct buffer *buf, |
1153 | EMACS_INT charpos, EMACS_INT nchars, int inherit) | |
ef29f213 | 1154 | { |
ae19ba7c | 1155 | EMACS_INT opoint = PT; |
3be11131 | 1156 | |
62b82678 RS |
1157 | insert_from_buffer_1 (buf, charpos, nchars, inherit); |
1158 | signal_after_change (opoint, 0, PT - opoint); | |
0ef71121 | 1159 | update_compositions (opoint, PT, CHECK_BORDER); |
ef29f213 KH |
1160 | } |
1161 | ||
1162 | static void | |
ae19ba7c SM |
1163 | insert_from_buffer_1 (struct buffer *buf, |
1164 | EMACS_INT from, EMACS_INT nchars, int inherit) | |
ef29f213 | 1165 | { |
0aa8c4b2 | 1166 | register Lisp_Object temp; |
ae19ba7c SM |
1167 | EMACS_INT chunk, chunk_expanded; |
1168 | EMACS_INT from_byte = buf_charpos_to_bytepos (buf, from); | |
1169 | EMACS_INT to_byte = buf_charpos_to_bytepos (buf, from + nchars); | |
1170 | EMACS_INT incoming_nbytes = to_byte - from_byte; | |
1171 | EMACS_INT outgoing_nbytes = incoming_nbytes; | |
ce97a2d7 | 1172 | INTERVAL intervals; |
2b083808 RS |
1173 | |
1174 | /* Make OUTGOING_NBYTES describe the text | |
1175 | as it will be inserted in this buffer. */ | |
1176 | ||
1177 | if (NILP (current_buffer->enable_multibyte_characters)) | |
1178 | outgoing_nbytes = nchars; | |
1179 | else if (NILP (buf->enable_multibyte_characters)) | |
4468c4f1 | 1180 | { |
ae19ba7c SM |
1181 | EMACS_INT outgoing_before_gap = 0; |
1182 | EMACS_INT outgoing_after_gap = 0; | |
ef29f213 | 1183 | |
4468c4f1 KH |
1184 | if (from < BUF_GPT (buf)) |
1185 | { | |
1186 | chunk = BUF_GPT_BYTE (buf) - from_byte; | |
1187 | if (chunk > incoming_nbytes) | |
1188 | chunk = incoming_nbytes; | |
1189 | outgoing_before_gap | |
1190 | = count_size_as_multibyte (BUF_BYTE_ADDRESS (buf, from_byte), | |
1191 | chunk); | |
1192 | } | |
1193 | else | |
1194 | chunk = 0; | |
1195 | ||
1196 | if (chunk < incoming_nbytes) | |
1197 | outgoing_after_gap | |
177c0ea7 | 1198 | = count_size_as_multibyte (BUF_BYTE_ADDRESS (buf, |
4468c4f1 KH |
1199 | from_byte + chunk), |
1200 | incoming_nbytes - chunk); | |
1201 | ||
1202 | outgoing_nbytes = outgoing_before_gap + outgoing_after_gap; | |
1203 | } | |
177c0ea7 | 1204 | |
ef29f213 | 1205 | /* Make sure point-max won't overflow after this insertion. */ |
2b083808 RS |
1206 | XSETINT (temp, outgoing_nbytes + Z); |
1207 | if (outgoing_nbytes + Z != XINT (temp)) | |
3be11131 | 1208 | error ("Maximum buffer size exceeded"); |
ef29f213 | 1209 | |
35d63725 RS |
1210 | /* Do this before moving and increasing the gap, |
1211 | because the before-change hooks might move the gap | |
1212 | or make it smaller. */ | |
d206af14 | 1213 | prepare_to_modify_buffer (PT, PT, NULL); |
ef29f213 KH |
1214 | |
1215 | if (PT != GPT) | |
3be11131 | 1216 | move_gap_both (PT, PT_BYTE); |
2b083808 RS |
1217 | if (GAP_SIZE < outgoing_nbytes) |
1218 | make_gap (outgoing_nbytes - GAP_SIZE); | |
ef29f213 | 1219 | |
3be11131 | 1220 | if (from < BUF_GPT (buf)) |
ef29f213 | 1221 | { |
3be11131 | 1222 | chunk = BUF_GPT_BYTE (buf) - from_byte; |
2b083808 RS |
1223 | if (chunk > incoming_nbytes) |
1224 | chunk = incoming_nbytes; | |
4468c4f1 KH |
1225 | /* Record number of output bytes, so we know where |
1226 | to put the output from the second copy_text. */ | |
1227 | chunk_expanded | |
1228 | = copy_text (BUF_BYTE_ADDRESS (buf, from_byte), | |
1229 | GPT_ADDR, chunk, | |
1230 | ! NILP (buf->enable_multibyte_characters), | |
1231 | ! NILP (current_buffer->enable_multibyte_characters)); | |
ef29f213 KH |
1232 | } |
1233 | else | |
4468c4f1 KH |
1234 | chunk_expanded = chunk = 0; |
1235 | ||
2b083808 RS |
1236 | if (chunk < incoming_nbytes) |
1237 | copy_text (BUF_BYTE_ADDRESS (buf, from_byte + chunk), | |
4468c4f1 | 1238 | GPT_ADDR + chunk_expanded, incoming_nbytes - chunk, |
2b083808 RS |
1239 | ! NILP (buf->enable_multibyte_characters), |
1240 | ! NILP (current_buffer->enable_multibyte_characters)); | |
ef29f213 | 1241 | |
b16afa45 | 1242 | #ifdef BYTE_COMBINING_DEBUG |
432f78d2 RS |
1243 | /* We have copied text into the gap, but we have not altered |
1244 | PT or PT_BYTE yet. So we can pass PT and PT_BYTE | |
1245 | to these functions and get the same results as we would | |
1f90a790 | 1246 | have got earlier on. Meanwhile, GPT_ADDR does point to |
432f78d2 | 1247 | the text that has been stored by copy_text. */ |
b16afa45 KH |
1248 | if (count_combining_before (GPT_ADDR, outgoing_nbytes, PT, PT_BYTE) |
1249 | || count_combining_after (GPT_ADDR, outgoing_nbytes, PT, PT_BYTE)) | |
1250 | abort (); | |
1251 | #endif | |
432f78d2 | 1252 | |
b16afa45 | 1253 | record_insert (PT, nchars); |
432f78d2 | 1254 | MODIFF++; |
3e145152 | 1255 | CHARS_MODIFF = MODIFF; |
432f78d2 | 1256 | |
2b083808 | 1257 | GAP_SIZE -= outgoing_nbytes; |
1f90a790 RS |
1258 | GPT += nchars; |
1259 | ZV += nchars; | |
1260 | Z += nchars; | |
2b083808 RS |
1261 | GPT_BYTE += outgoing_nbytes; |
1262 | ZV_BYTE += outgoing_nbytes; | |
1263 | Z_BYTE += outgoing_nbytes; | |
469ff680 | 1264 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
1f90a790 | 1265 | |
1f90a790 RS |
1266 | if (GPT_BYTE < GPT) |
1267 | abort (); | |
1268 | ||
9dde4e0c KS |
1269 | /* The insert may have been in the unchanged region, so check again. */ |
1270 | if (Z - GPT < END_UNCHANGED) | |
1271 | END_UNCHANGED = Z - GPT; | |
1272 | ||
1f90a790 RS |
1273 | adjust_overlays_for_insert (PT, nchars); |
1274 | adjust_markers_for_insert (PT, PT_BYTE, PT + nchars, | |
432f78d2 | 1275 | PT_BYTE + outgoing_nbytes, |
b16afa45 | 1276 | 0); |
ce97a2d7 | 1277 | |
1f90a790 RS |
1278 | if (BUF_INTERVALS (current_buffer) != 0) |
1279 | offset_intervals (current_buffer, PT, nchars); | |
ce97a2d7 | 1280 | |
b16afa45 | 1281 | /* Get the intervals for the part of the string we are inserting. */ |
ce97a2d7 | 1282 | intervals = BUF_INTERVALS (buf); |
f1a6b216 | 1283 | if (nchars < BUF_Z (buf) - BUF_BEG (buf)) |
06d8227a GM |
1284 | { |
1285 | if (buf == current_buffer && PT <= from) | |
1286 | from += nchars; | |
1287 | intervals = copy_intervals (intervals, from, nchars); | |
1288 | } | |
177c0ea7 | 1289 | |
ce97a2d7 | 1290 | /* Insert those intervals. */ |
1f90a790 | 1291 | graft_intervals_into_buffer (intervals, PT, nchars, current_buffer, inherit); |
ce97a2d7 | 1292 | |
b16afa45 | 1293 | adjust_point (nchars, outgoing_nbytes); |
b45433b3 JB |
1294 | } |
1295 | \f | |
652838b5 KH |
1296 | /* Record undo information and adjust markers and position keepers for |
1297 | a replacement of a text PREV_TEXT at FROM to a new text of LEN | |
1298 | chars (LEN_BYTE bytes) which resides in the gap just after | |
1299 | GPT_ADDR. | |
1300 | ||
1301 | PREV_TEXT nil means the new text was just inserted. */ | |
2d9eea44 | 1302 | |
1e9c7b7d | 1303 | void |
ae19ba7c SM |
1304 | adjust_after_replace (EMACS_INT from, EMACS_INT from_byte, |
1305 | Lisp_Object prev_text, EMACS_INT len, EMACS_INT len_byte) | |
1e9c7b7d | 1306 | { |
ae19ba7c | 1307 | EMACS_INT nchars_del = 0, nbytes_del = 0; |
61415a25 | 1308 | |
b16afa45 KH |
1309 | #ifdef BYTE_COMBINING_DEBUG |
1310 | if (count_combining_before (GPT_ADDR, len_byte, from, from_byte) | |
1311 | || count_combining_after (GPT_ADDR, len_byte, from, from_byte)) | |
1312 | abort (); | |
1313 | #endif | |
1314 | ||
828f1ed3 KH |
1315 | if (STRINGP (prev_text)) |
1316 | { | |
d5db4077 KR |
1317 | nchars_del = SCHARS (prev_text); |
1318 | nbytes_del = SBYTES (prev_text); | |
828f1ed3 KH |
1319 | } |
1320 | ||
61415a25 KH |
1321 | /* Update various buffer positions for the new text. */ |
1322 | GAP_SIZE -= len_byte; | |
1323 | ZV += len; Z+= len; | |
1324 | ZV_BYTE += len_byte; Z_BYTE += len_byte; | |
1325 | GPT += len; GPT_BYTE += len_byte; | |
1326 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ | |
1327 | ||
adee4f91 KH |
1328 | if (nchars_del > 0) |
1329 | adjust_markers_for_replace (from, from_byte, nchars_del, nbytes_del, | |
1330 | len, len_byte); | |
1331 | else | |
1332 | adjust_markers_for_insert (from, from_byte, | |
1333 | from + len, from_byte + len_byte, 0); | |
b16afa45 | 1334 | |
828f1ed3 KH |
1335 | if (! EQ (current_buffer->undo_list, Qt)) |
1336 | { | |
828f1ed3 | 1337 | if (nchars_del > 0) |
b16afa45 KH |
1338 | record_delete (from, prev_text); |
1339 | record_insert (from, len); | |
828f1ed3 | 1340 | } |
652838b5 KH |
1341 | |
1342 | if (len > nchars_del) | |
1343 | adjust_overlays_for_insert (from, len - nchars_del); | |
1344 | else if (len < nchars_del) | |
1345 | adjust_overlays_for_delete (from, nchars_del - len); | |
61415a25 | 1346 | if (BUF_INTERVALS (current_buffer) != 0) |
4a7cf15f KH |
1347 | { |
1348 | offset_intervals (current_buffer, from, len - nchars_del); | |
4a7cf15f | 1349 | } |
61415a25 | 1350 | |
b16afa45 KH |
1351 | if (from < PT) |
1352 | adjust_point (len - nchars_del, len_byte - nbytes_del); | |
61415a25 | 1353 | |
9f3ede3c | 1354 | /* As byte combining will decrease Z, we must check this again. */ |
a50df55b GM |
1355 | if (Z - GPT < END_UNCHANGED) |
1356 | END_UNCHANGED = Z - GPT; | |
9f3ede3c | 1357 | |
60ea6052 RS |
1358 | CHECK_MARKERS (); |
1359 | ||
1e9c7b7d | 1360 | if (len == 0) |
b58e3ca1 RS |
1361 | evaporate_overlays (from); |
1362 | MODIFF++; | |
3e145152 | 1363 | CHARS_MODIFF = MODIFF; |
b58e3ca1 RS |
1364 | } |
1365 | ||
1366 | /* Like adjust_after_replace, but doesn't require PREV_TEXT. | |
1367 | This is for use when undo is not enabled in the current buffer. */ | |
1368 | ||
1369 | void | |
ae19ba7c SM |
1370 | adjust_after_replace_noundo (EMACS_INT from, EMACS_INT from_byte, |
1371 | EMACS_INT nchars_del, EMACS_INT nbytes_del, | |
1372 | EMACS_INT len, EMACS_INT len_byte) | |
b58e3ca1 RS |
1373 | { |
1374 | #ifdef BYTE_COMBINING_DEBUG | |
1375 | if (count_combining_before (GPT_ADDR, len_byte, from, from_byte) | |
1376 | || count_combining_after (GPT_ADDR, len_byte, from, from_byte)) | |
1377 | abort (); | |
1378 | #endif | |
1379 | ||
1380 | /* Update various buffer positions for the new text. */ | |
1381 | GAP_SIZE -= len_byte; | |
1382 | ZV += len; Z+= len; | |
1383 | ZV_BYTE += len_byte; Z_BYTE += len_byte; | |
1384 | GPT += len; GPT_BYTE += len_byte; | |
1385 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ | |
1386 | ||
1387 | if (nchars_del > 0) | |
1388 | adjust_markers_for_replace (from, from_byte, nchars_del, nbytes_del, | |
1389 | len, len_byte); | |
1390 | else | |
1391 | adjust_markers_for_insert (from, from_byte, | |
1392 | from + len, from_byte + len_byte, 0); | |
1393 | ||
1394 | if (len > nchars_del) | |
1395 | adjust_overlays_for_insert (from, len - nchars_del); | |
1396 | else if (len < nchars_del) | |
1397 | adjust_overlays_for_delete (from, nchars_del - len); | |
1398 | if (BUF_INTERVALS (current_buffer) != 0) | |
1399 | { | |
1400 | offset_intervals (current_buffer, from, len - nchars_del); | |
1401 | } | |
1402 | ||
1403 | if (from < PT) | |
1404 | adjust_point (len - nchars_del, len_byte - nbytes_del); | |
1405 | ||
1406 | /* As byte combining will decrease Z, we must check this again. */ | |
1407 | if (Z - GPT < END_UNCHANGED) | |
1408 | END_UNCHANGED = Z - GPT; | |
1409 | ||
1410 | CHECK_MARKERS (); | |
1411 | ||
1412 | if (len == 0) | |
1e9c7b7d KH |
1413 | evaporate_overlays (from); |
1414 | MODIFF++; | |
3e145152 | 1415 | CHARS_MODIFF = MODIFF; |
1e9c7b7d KH |
1416 | } |
1417 | ||
652838b5 KH |
1418 | /* Record undo information, adjust markers and position keepers for an |
1419 | insertion of a text from FROM (FROM_BYTE) to TO (TO_BYTE). The | |
1420 | text already exists in the current buffer but character length (TO | |
1421 | - FROM) may be incorrect, the correct length is NEWLEN. */ | |
1422 | ||
1423 | void | |
ae19ba7c SM |
1424 | adjust_after_insert (EMACS_INT from, EMACS_INT from_byte, |
1425 | EMACS_INT to, EMACS_INT to_byte, EMACS_INT newlen) | |
652838b5 | 1426 | { |
ae19ba7c | 1427 | EMACS_INT len = to - from, len_byte = to_byte - from_byte; |
652838b5 KH |
1428 | |
1429 | if (GPT != to) | |
1430 | move_gap_both (to, to_byte); | |
1431 | GAP_SIZE += len_byte; | |
1432 | GPT -= len; GPT_BYTE -= len_byte; | |
1433 | ZV -= len; ZV_BYTE -= len_byte; | |
1434 | Z -= len; Z_BYTE -= len_byte; | |
1435 | adjust_after_replace (from, from_byte, Qnil, newlen, len_byte); | |
1436 | } | |
085db7de | 1437 | \f |
3be11131 | 1438 | /* Replace the text from character positions FROM to TO with NEW, |
c5ca4d3a RS |
1439 | If PREPARE is nonzero, call prepare_to_modify_buffer. |
1440 | If INHERIT, the newly inserted text should inherit text properties | |
1441 | from the surrounding non-deleted text. */ | |
1442 | ||
1443 | /* Note that this does not yet handle markers quite right. | |
1444 | Also it needs to record a single undo-entry that does a replacement | |
1445 | rather than a separate delete and insert. | |
60aa777a RS |
1446 | That way, undo will also handle markers properly. |
1447 | ||
1448 | But if MARKERS is 0, don't relocate markers. */ | |
c5ca4d3a RS |
1449 | |
1450 | void | |
ae19ba7c SM |
1451 | replace_range (EMACS_INT from, EMACS_INT to, Lisp_Object new, |
1452 | int prepare, int inherit, int markers) | |
c5ca4d3a | 1453 | { |
ae19ba7c SM |
1454 | EMACS_INT inschars = SCHARS (new); |
1455 | EMACS_INT insbytes = SBYTES (new); | |
1456 | EMACS_INT from_byte, to_byte; | |
1457 | EMACS_INT nbytes_del, nchars_del; | |
c5ca4d3a RS |
1458 | register Lisp_Object temp; |
1459 | struct gcpro gcpro1; | |
ce97a2d7 | 1460 | INTERVAL intervals; |
ae19ba7c | 1461 | EMACS_INT outgoing_insbytes = insbytes; |
23b20a70 | 1462 | Lisp_Object deletion; |
c5ca4d3a | 1463 | |
60ea6052 RS |
1464 | CHECK_MARKERS (); |
1465 | ||
c5ca4d3a | 1466 | GCPRO1 (new); |
6bbd7a29 | 1467 | deletion = Qnil; |
c5ca4d3a RS |
1468 | |
1469 | if (prepare) | |
1470 | { | |
ae19ba7c | 1471 | EMACS_INT range_length = to - from; |
c5ca4d3a RS |
1472 | prepare_to_modify_buffer (from, to, &from); |
1473 | to = from + range_length; | |
1474 | } | |
1475 | ||
3be11131 RS |
1476 | UNGCPRO; |
1477 | ||
c5ca4d3a RS |
1478 | /* Make args be valid */ |
1479 | if (from < BEGV) | |
1480 | from = BEGV; | |
1481 | if (to > ZV) | |
1482 | to = ZV; | |
1483 | ||
3be11131 RS |
1484 | from_byte = CHAR_TO_BYTE (from); |
1485 | to_byte = CHAR_TO_BYTE (to); | |
c5ca4d3a | 1486 | |
3be11131 RS |
1487 | nchars_del = to - from; |
1488 | nbytes_del = to_byte - from_byte; | |
1489 | ||
1490 | if (nbytes_del <= 0 && insbytes == 0) | |
1491 | return; | |
c5ca4d3a | 1492 | |
1f90a790 RS |
1493 | /* Make OUTGOING_INSBYTES describe the text |
1494 | as it will be inserted in this buffer. */ | |
1495 | ||
1496 | if (NILP (current_buffer->enable_multibyte_characters)) | |
1497 | outgoing_insbytes = inschars; | |
2a1d8be0 | 1498 | else if (! STRING_MULTIBYTE (new)) |
1f90a790 | 1499 | outgoing_insbytes |
d5db4077 | 1500 | = count_size_as_multibyte (SDATA (new), insbytes); |
1f90a790 | 1501 | |
c5ca4d3a | 1502 | /* Make sure point-max won't overflow after this insertion. */ |
3be11131 RS |
1503 | XSETINT (temp, Z_BYTE - nbytes_del + insbytes); |
1504 | if (Z_BYTE - nbytes_del + insbytes != XINT (temp)) | |
1505 | error ("Maximum buffer size exceeded"); | |
c5ca4d3a | 1506 | |
c5ca4d3a RS |
1507 | GCPRO1 (new); |
1508 | ||
1509 | /* Make sure the gap is somewhere in or next to what we are deleting. */ | |
1510 | if (from > GPT) | |
3be11131 | 1511 | gap_right (from, from_byte); |
c5ca4d3a | 1512 | if (to < GPT) |
3be11131 | 1513 | gap_left (to, to_byte, 0); |
c5ca4d3a | 1514 | |
039af53a KH |
1515 | /* Even if we don't record for undo, we must keep the original text |
1516 | because we may have to recover it because of inappropriate byte | |
1517 | combining. */ | |
b16afa45 KH |
1518 | if (! EQ (current_buffer->undo_list, Qt)) |
1519 | deletion = make_buffer_string_both (from, from_byte, to, to_byte, 1); | |
c5ca4d3a | 1520 | |
3be11131 RS |
1521 | GAP_SIZE += nbytes_del; |
1522 | ZV -= nchars_del; | |
1523 | Z -= nchars_del; | |
1524 | ZV_BYTE -= nbytes_del; | |
1525 | Z_BYTE -= nbytes_del; | |
c5ca4d3a | 1526 | GPT = from; |
3be11131 | 1527 | GPT_BYTE = from_byte; |
017e09ac | 1528 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
c5ca4d3a | 1529 | |
3be11131 RS |
1530 | if (GPT_BYTE < GPT) |
1531 | abort (); | |
1532 | ||
a50df55b GM |
1533 | if (GPT - BEG < BEG_UNCHANGED) |
1534 | BEG_UNCHANGED = GPT - BEG; | |
1535 | if (Z - GPT < END_UNCHANGED) | |
1536 | END_UNCHANGED = Z - GPT; | |
c5ca4d3a | 1537 | |
3be11131 RS |
1538 | if (GAP_SIZE < insbytes) |
1539 | make_gap (insbytes - GAP_SIZE); | |
c5ca4d3a | 1540 | |
1f90a790 RS |
1541 | /* Copy the string text into the buffer, perhaps converting |
1542 | between single-byte and multibyte. */ | |
d5db4077 | 1543 | copy_text (SDATA (new), GPT_ADDR, insbytes, |
2a1d8be0 | 1544 | STRING_MULTIBYTE (new), |
1f90a790 RS |
1545 | ! NILP (current_buffer->enable_multibyte_characters)); |
1546 | ||
b16afa45 | 1547 | #ifdef BYTE_COMBINING_DEBUG |
255c7dae RS |
1548 | /* We have copied text into the gap, but we have not marked |
1549 | it as part of the buffer. So we can use the old FROM and FROM_BYTE | |
1550 | here, for both the previous text and the following text. | |
1551 | Meanwhile, GPT_ADDR does point to | |
432f78d2 | 1552 | the text that has been stored by copy_text. */ |
b16afa45 KH |
1553 | if (count_combining_before (GPT_ADDR, outgoing_insbytes, from, from_byte) |
1554 | || count_combining_after (GPT_ADDR, outgoing_insbytes, from, from_byte)) | |
1555 | abort (); | |
1556 | #endif | |
432f78d2 | 1557 | |
23b20a70 KH |
1558 | if (! EQ (current_buffer->undo_list, Qt)) |
1559 | { | |
bec1aca2 RS |
1560 | /* Record the insertion first, so that when we undo, |
1561 | the deletion will be undone first. Thus, undo | |
1562 | will insert before deleting, and thus will keep | |
1563 | the markers before and after this text separate. */ | |
1564 | record_insert (from + SCHARS (deletion), inschars); | |
b16afa45 | 1565 | record_delete (from, deletion); |
23b20a70 | 1566 | } |
c5ca4d3a | 1567 | |
1f90a790 RS |
1568 | GAP_SIZE -= outgoing_insbytes; |
1569 | GPT += inschars; | |
1570 | ZV += inschars; | |
1571 | Z += inschars; | |
1572 | GPT_BYTE += outgoing_insbytes; | |
1573 | ZV_BYTE += outgoing_insbytes; | |
1574 | Z_BYTE += outgoing_insbytes; | |
c5ca4d3a RS |
1575 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
1576 | ||
3be11131 RS |
1577 | if (GPT_BYTE < GPT) |
1578 | abort (); | |
1579 | ||
c5ca4d3a RS |
1580 | /* Adjust the overlay center as needed. This must be done after |
1581 | adjusting the markers that bound the overlays. */ | |
3be11131 | 1582 | adjust_overlays_for_delete (from, nchars_del); |
1f90a790 | 1583 | adjust_overlays_for_insert (from, inschars); |
048a0fbb RS |
1584 | |
1585 | /* Adjust markers for the deletion and the insertion. */ | |
60aa777a | 1586 | if (markers) |
048a0fbb RS |
1587 | adjust_markers_for_replace (from, from_byte, nchars_del, nbytes_del, |
1588 | inschars, outgoing_insbytes); | |
c5ca4d3a | 1589 | |
255c7dae | 1590 | offset_intervals (current_buffer, from, inschars - nchars_del); |
ce97a2d7 RS |
1591 | |
1592 | /* Get the intervals for the part of the string we are inserting-- | |
1593 | not including the combined-before bytes. */ | |
d5db4077 | 1594 | intervals = STRING_INTERVALS (new); |
ce97a2d7 | 1595 | /* Insert those intervals. */ |
1f90a790 | 1596 | graft_intervals_into_buffer (intervals, from, inschars, |
ce97a2d7 | 1597 | current_buffer, inherit); |
c5ca4d3a | 1598 | |
1f90a790 RS |
1599 | /* Relocate point as if it were a marker. */ |
1600 | if (from < PT) | |
8bedbe9d | 1601 | adjust_point ((from + inschars - (PT < to ? PT : to)), |
1f90a790 | 1602 | (from_byte + outgoing_insbytes |
8bedbe9d | 1603 | - (PT_BYTE < to_byte ? PT_BYTE : to_byte))); |
c5ca4d3a | 1604 | |
1f90a790 RS |
1605 | if (outgoing_insbytes == 0) |
1606 | evaporate_overlays (from); | |
93b882e8 | 1607 | |
60ea6052 RS |
1608 | CHECK_MARKERS (); |
1609 | ||
c5ca4d3a | 1610 | MODIFF++; |
3e145152 | 1611 | CHARS_MODIFF = MODIFF; |
c5ca4d3a RS |
1612 | UNGCPRO; |
1613 | ||
255c7dae | 1614 | signal_after_change (from, nchars_del, GPT - from); |
0ef71121 | 1615 | update_compositions (from, GPT, CHECK_BORDER); |
c5ca4d3a RS |
1616 | } |
1617 | \f | |
085db7de RS |
1618 | /* Replace the text from character positions FROM to TO with |
1619 | the text in INS of length INSCHARS. | |
1620 | Keep the text properties that applied to the old characters | |
1621 | (extending them to all the new chars if there are more new chars). | |
1622 | ||
1623 | Note that this does not yet handle markers quite right. | |
1624 | ||
1625 | If MARKERS is nonzero, relocate markers. | |
1626 | ||
1627 | Unlike most functions at this level, never call | |
1628 | prepare_to_modify_buffer and never call signal_after_change. */ | |
1629 | ||
1630 | void | |
ae19ba7c SM |
1631 | replace_range_2 (EMACS_INT from, EMACS_INT from_byte, |
1632 | EMACS_INT to, EMACS_INT to_byte, | |
a8fe7202 | 1633 | const char *ins, EMACS_INT inschars, EMACS_INT insbytes, |
ae19ba7c | 1634 | int markers) |
085db7de | 1635 | { |
ae19ba7c | 1636 | EMACS_INT nbytes_del, nchars_del; |
085db7de RS |
1637 | Lisp_Object temp; |
1638 | ||
1639 | CHECK_MARKERS (); | |
1640 | ||
1641 | nchars_del = to - from; | |
1642 | nbytes_del = to_byte - from_byte; | |
1643 | ||
1644 | if (nbytes_del <= 0 && insbytes == 0) | |
1645 | return; | |
1646 | ||
1647 | /* Make sure point-max won't overflow after this insertion. */ | |
1648 | XSETINT (temp, Z_BYTE - nbytes_del + insbytes); | |
1649 | if (Z_BYTE - nbytes_del + insbytes != XINT (temp)) | |
1650 | error ("Maximum buffer size exceeded"); | |
1651 | ||
1652 | /* Make sure the gap is somewhere in or next to what we are deleting. */ | |
1653 | if (from > GPT) | |
1654 | gap_right (from, from_byte); | |
1655 | if (to < GPT) | |
1656 | gap_left (to, to_byte, 0); | |
1657 | ||
1658 | GAP_SIZE += nbytes_del; | |
1659 | ZV -= nchars_del; | |
1660 | Z -= nchars_del; | |
1661 | ZV_BYTE -= nbytes_del; | |
1662 | Z_BYTE -= nbytes_del; | |
1663 | GPT = from; | |
1664 | GPT_BYTE = from_byte; | |
1665 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ | |
1666 | ||
1667 | if (GPT_BYTE < GPT) | |
1668 | abort (); | |
1669 | ||
1670 | if (GPT - BEG < BEG_UNCHANGED) | |
1671 | BEG_UNCHANGED = GPT - BEG; | |
1672 | if (Z - GPT < END_UNCHANGED) | |
1673 | END_UNCHANGED = Z - GPT; | |
1674 | ||
1675 | if (GAP_SIZE < insbytes) | |
1676 | make_gap (insbytes - GAP_SIZE); | |
1677 | ||
1678 | /* Copy the replacement text into the buffer. */ | |
72af86bd | 1679 | memcpy (GPT_ADDR, ins, insbytes); |
085db7de RS |
1680 | |
1681 | #ifdef BYTE_COMBINING_DEBUG | |
1682 | /* We have copied text into the gap, but we have not marked | |
1683 | it as part of the buffer. So we can use the old FROM and FROM_BYTE | |
1684 | here, for both the previous text and the following text. | |
1685 | Meanwhile, GPT_ADDR does point to | |
1686 | the text that has been stored by copy_text. */ | |
1687 | if (count_combining_before (GPT_ADDR, insbytes, from, from_byte) | |
1688 | || count_combining_after (GPT_ADDR, insbytes, from, from_byte)) | |
1689 | abort (); | |
1690 | #endif | |
1691 | ||
1692 | GAP_SIZE -= insbytes; | |
1693 | GPT += inschars; | |
1694 | ZV += inschars; | |
1695 | Z += inschars; | |
1696 | GPT_BYTE += insbytes; | |
1697 | ZV_BYTE += insbytes; | |
1698 | Z_BYTE += insbytes; | |
1699 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ | |
1700 | ||
1701 | if (GPT_BYTE < GPT) | |
1702 | abort (); | |
1703 | ||
1704 | /* Adjust the overlay center as needed. This must be done after | |
1705 | adjusting the markers that bound the overlays. */ | |
1706 | if (nchars_del != inschars) | |
1707 | { | |
1708 | adjust_overlays_for_insert (from, inschars); | |
1709 | adjust_overlays_for_delete (from + inschars, nchars_del); | |
1710 | } | |
1711 | ||
1712 | /* Adjust markers for the deletion and the insertion. */ | |
1713 | if (markers | |
7077904e | 1714 | && ! (nchars_del == 1 && inschars == 1 && nbytes_del == insbytes)) |
085db7de RS |
1715 | adjust_markers_for_replace (from, from_byte, nchars_del, nbytes_del, |
1716 | inschars, insbytes); | |
1717 | ||
1718 | offset_intervals (current_buffer, from, inschars - nchars_del); | |
1719 | ||
1720 | /* Relocate point as if it were a marker. */ | |
7077904e KH |
1721 | if (from < PT && (nchars_del != inschars || nbytes_del != insbytes)) |
1722 | { | |
1723 | if (PT < to) | |
1724 | /* PT was within the deleted text. Move it to FROM. */ | |
1725 | adjust_point (from - PT, from_byte - PT_BYTE); | |
1726 | else | |
1727 | adjust_point (inschars - nchars_del, insbytes - nbytes_del); | |
1728 | } | |
085db7de RS |
1729 | |
1730 | if (insbytes == 0) | |
1731 | evaporate_overlays (from); | |
1732 | ||
1733 | CHECK_MARKERS (); | |
1734 | ||
1735 | MODIFF++; | |
3e145152 | 1736 | CHARS_MODIFF = MODIFF; |
085db7de RS |
1737 | } |
1738 | \f | |
b45433b3 | 1739 | /* Delete characters in current buffer |
3be11131 RS |
1740 | from FROM up to (but not including) TO. |
1741 | If TO comes before FROM, we delete nothing. */ | |
b45433b3 | 1742 | |
c660b094 | 1743 | void |
ae19ba7c | 1744 | del_range (EMACS_INT from, EMACS_INT to) |
47c64747 | 1745 | { |
7dae4502 | 1746 | del_range_1 (from, to, 1, 0); |
47c64747 RS |
1747 | } |
1748 | ||
7dae4502 SM |
1749 | /* Like del_range; PREPARE says whether to call prepare_to_modify_buffer. |
1750 | RET_STRING says to return the deleted text. */ | |
47c64747 | 1751 | |
7dae4502 | 1752 | Lisp_Object |
ae19ba7c | 1753 | del_range_1 (EMACS_INT from, EMACS_INT to, int prepare, int ret_string) |
b45433b3 | 1754 | { |
ae19ba7c | 1755 | EMACS_INT from_byte, to_byte; |
7dae4502 SM |
1756 | Lisp_Object deletion; |
1757 | struct gcpro gcpro1; | |
3be11131 RS |
1758 | |
1759 | /* Make args be valid */ | |
1760 | if (from < BEGV) | |
1761 | from = BEGV; | |
1762 | if (to > ZV) | |
1763 | to = ZV; | |
1764 | ||
1765 | if (to <= from) | |
7dae4502 | 1766 | return Qnil; |
3be11131 RS |
1767 | |
1768 | if (prepare) | |
1769 | { | |
ae19ba7c | 1770 | EMACS_INT range_length = to - from; |
3be11131 | 1771 | prepare_to_modify_buffer (from, to, &from); |
0a411995 | 1772 | to = min (ZV, from + range_length); |
3be11131 RS |
1773 | } |
1774 | ||
1775 | from_byte = CHAR_TO_BYTE (from); | |
1776 | to_byte = CHAR_TO_BYTE (to); | |
1777 | ||
7dae4502 SM |
1778 | deletion = del_range_2 (from, from_byte, to, to_byte, ret_string); |
1779 | GCPRO1(deletion); | |
9c36993a | 1780 | signal_after_change (from, to - from, 0); |
233cc02d | 1781 | update_compositions (from, from, CHECK_HEAD); |
7dae4502 SM |
1782 | UNGCPRO; |
1783 | return deletion; | |
3be11131 RS |
1784 | } |
1785 | ||
1786 | /* Like del_range_1 but args are byte positions, not char positions. */ | |
1787 | ||
1788 | void | |
ae19ba7c | 1789 | del_range_byte (EMACS_INT from_byte, EMACS_INT to_byte, int prepare) |
3be11131 | 1790 | { |
ae19ba7c | 1791 | EMACS_INT from, to; |
3be11131 RS |
1792 | |
1793 | /* Make args be valid */ | |
1794 | if (from_byte < BEGV_BYTE) | |
1795 | from_byte = BEGV_BYTE; | |
1796 | if (to_byte > ZV_BYTE) | |
1797 | to_byte = ZV_BYTE; | |
1798 | ||
1799 | if (to_byte <= from_byte) | |
1800 | return; | |
1801 | ||
1802 | from = BYTE_TO_CHAR (from_byte); | |
1803 | to = BYTE_TO_CHAR (to_byte); | |
b45433b3 | 1804 | |
d206af14 RS |
1805 | if (prepare) |
1806 | { | |
ae19ba7c SM |
1807 | EMACS_INT old_from = from, old_to = Z - to; |
1808 | EMACS_INT range_length = to - from; | |
d206af14 RS |
1809 | prepare_to_modify_buffer (from, to, &from); |
1810 | to = from + range_length; | |
3be11131 RS |
1811 | |
1812 | if (old_from != from) | |
1813 | from_byte = CHAR_TO_BYTE (from); | |
0a411995 GM |
1814 | if (to > ZV) |
1815 | { | |
1816 | to = ZV; | |
1817 | to_byte = ZV_BYTE; | |
1818 | } | |
1819 | else if (old_to == Z - to) | |
3be11131 | 1820 | to_byte = CHAR_TO_BYTE (to); |
d206af14 RS |
1821 | } |
1822 | ||
7dae4502 | 1823 | del_range_2 (from, from_byte, to, to_byte, 0); |
9c36993a | 1824 | signal_after_change (from, to - from, 0); |
0ef71121 | 1825 | update_compositions (from, from, CHECK_HEAD); |
3be11131 RS |
1826 | } |
1827 | ||
1828 | /* Like del_range_1, but positions are specified both as charpos | |
1829 | and bytepos. */ | |
1830 | ||
1831 | void | |
ae19ba7c SM |
1832 | del_range_both (EMACS_INT from, EMACS_INT from_byte, |
1833 | EMACS_INT to, EMACS_INT to_byte, int prepare) | |
3be11131 | 1834 | { |
b45433b3 | 1835 | /* Make args be valid */ |
3be11131 RS |
1836 | if (from_byte < BEGV_BYTE) |
1837 | from_byte = BEGV_BYTE; | |
1838 | if (to_byte > ZV_BYTE) | |
1839 | to_byte = ZV_BYTE; | |
1840 | ||
1841 | if (to_byte <= from_byte) | |
1842 | return; | |
1843 | ||
b45433b3 JB |
1844 | if (from < BEGV) |
1845 | from = BEGV; | |
1846 | if (to > ZV) | |
1847 | to = ZV; | |
1848 | ||
3be11131 RS |
1849 | if (prepare) |
1850 | { | |
ae19ba7c SM |
1851 | EMACS_INT old_from = from, old_to = Z - to; |
1852 | EMACS_INT range_length = to - from; | |
3be11131 RS |
1853 | prepare_to_modify_buffer (from, to, &from); |
1854 | to = from + range_length; | |
1855 | ||
1856 | if (old_from != from) | |
1857 | from_byte = CHAR_TO_BYTE (from); | |
0a411995 GM |
1858 | if (to > ZV) |
1859 | { | |
1860 | to = ZV; | |
1861 | to_byte = ZV_BYTE; | |
1862 | } | |
1863 | else if (old_to == Z - to) | |
3be11131 RS |
1864 | to_byte = CHAR_TO_BYTE (to); |
1865 | } | |
1866 | ||
7dae4502 | 1867 | del_range_2 (from, from_byte, to, to_byte, 0); |
9c36993a | 1868 | signal_after_change (from, to - from, 0); |
0ef71121 | 1869 | update_compositions (from, from, CHECK_HEAD); |
3be11131 RS |
1870 | } |
1871 | ||
1872 | /* Delete a range of text, specified both as character positions | |
1873 | and byte positions. FROM and TO are character positions, | |
7dae4502 SM |
1874 | while FROM_BYTE and TO_BYTE are byte positions. |
1875 | If RET_STRING is true, the deleted area is returned as a string. */ | |
3be11131 | 1876 | |
7dae4502 | 1877 | Lisp_Object |
ae19ba7c SM |
1878 | del_range_2 (EMACS_INT from, EMACS_INT from_byte, |
1879 | EMACS_INT to, EMACS_INT to_byte, int ret_string) | |
3be11131 | 1880 | { |
ae19ba7c | 1881 | register EMACS_INT nbytes_del, nchars_del; |
628cea90 | 1882 | Lisp_Object deletion; |
3be11131 | 1883 | |
60ea6052 RS |
1884 | CHECK_MARKERS (); |
1885 | ||
3be11131 RS |
1886 | nchars_del = to - from; |
1887 | nbytes_del = to_byte - from_byte; | |
b45433b3 JB |
1888 | |
1889 | /* Make sure the gap is somewhere in or next to what we are deleting. */ | |
1890 | if (from > GPT) | |
3be11131 | 1891 | gap_right (from, from_byte); |
b45433b3 | 1892 | if (to < GPT) |
3be11131 | 1893 | gap_left (to, to_byte, 0); |
b45433b3 | 1894 | |
b16afa45 KH |
1895 | #ifdef BYTE_COMBINING_DEBUG |
1896 | if (count_combining_before (BUF_BYTE_ADDRESS (current_buffer, to_byte), | |
1897 | Z_BYTE - to_byte, from, from_byte)) | |
1898 | abort (); | |
1899 | #endif | |
628cea90 | 1900 | |
7dae4502 | 1901 | if (ret_string || ! EQ (current_buffer->undo_list, Qt)) |
b16afa45 | 1902 | deletion = make_buffer_string_both (from, from_byte, to, to_byte, 1); |
7dae4502 SM |
1903 | else |
1904 | deletion = Qnil; | |
1905 | ||
8948d317 RS |
1906 | /* Relocate all markers pointing into the new, larger gap |
1907 | to point at the end of the text before the gap. | |
3be11131 RS |
1908 | Do this before recording the deletion, |
1909 | so that undo handles this after reinserting the text. */ | |
1910 | adjust_markers_for_delete (from, from_byte, to, to_byte); | |
b16afa45 | 1911 | |
0aa8c4b2 | 1912 | if (! EQ (current_buffer->undo_list, Qt)) |
b16afa45 | 1913 | record_delete (from, deletion); |
be09561e | 1914 | MODIFF++; |
3e145152 | 1915 | CHARS_MODIFF = MODIFF; |
be09561e | 1916 | |
b45433b3 | 1917 | /* Relocate point as if it were a marker. */ |
2bcaed71 | 1918 | if (from < PT) |
3be11131 RS |
1919 | adjust_point (from - (PT < to ? PT : to), |
1920 | from_byte - (PT_BYTE < to_byte ? PT_BYTE : to_byte)); | |
b45433b3 | 1921 | |
3be11131 | 1922 | offset_intervals (current_buffer, from, - nchars_del); |
16032db6 | 1923 | |
adde4858 | 1924 | /* Adjust the overlay center as needed. This must be done after |
a7f38d28 | 1925 | adjusting the markers that bound the overlays. */ |
e3a87305 | 1926 | adjust_overlays_for_delete (from, nchars_del); |
adde4858 | 1927 | |
3be11131 RS |
1928 | GAP_SIZE += nbytes_del; |
1929 | ZV_BYTE -= nbytes_del; | |
1930 | Z_BYTE -= nbytes_del; | |
1931 | ZV -= nchars_del; | |
1932 | Z -= nchars_del; | |
b45433b3 | 1933 | GPT = from; |
3be11131 | 1934 | GPT_BYTE = from_byte; |
b3b58c01 AS |
1935 | if (GAP_SIZE > 0 && !current_buffer->text->inhibit_shrinking) |
1936 | /* Put an anchor, unless called from decode_coding_object which | |
1937 | needs to access the previous gap contents. */ | |
1938 | *(GPT_ADDR) = 0; | |
e3a87305 | 1939 | |
3be11131 RS |
1940 | if (GPT_BYTE < GPT) |
1941 | abort (); | |
1942 | ||
a50df55b GM |
1943 | if (GPT - BEG < BEG_UNCHANGED) |
1944 | BEG_UNCHANGED = GPT - BEG; | |
1945 | if (Z - GPT < END_UNCHANGED) | |
1946 | END_UNCHANGED = Z - GPT; | |
b45433b3 | 1947 | |
60ea6052 RS |
1948 | CHECK_MARKERS (); |
1949 | ||
d386034e | 1950 | evaporate_overlays (from); |
7dae4502 SM |
1951 | |
1952 | return deletion; | |
b45433b3 JB |
1953 | } |
1954 | \f | |
3be11131 RS |
1955 | /* Call this if you're about to change the region of BUFFER from |
1956 | character positions START to END. This checks the read-only | |
1957 | properties of the region, calls the necessary modification hooks, | |
1958 | and warns the next redisplay that it should pay attention to that | |
3e145152 CY |
1959 | area. |
1960 | ||
1961 | If PRESERVE_CHARS_MODIFF is non-zero, do not update CHARS_MODIFF. | |
1962 | Otherwise set CHARS_MODIFF to the new value of MODIFF. */ | |
3be11131 | 1963 | |
c660b094 | 1964 | void |
ae19ba7c SM |
1965 | modify_region (struct buffer *buffer, EMACS_INT start, EMACS_INT end, |
1966 | int preserve_chars_modiff) | |
b45433b3 | 1967 | { |
04a759c8 JB |
1968 | struct buffer *old_buffer = current_buffer; |
1969 | ||
1970 | if (buffer != old_buffer) | |
1971 | set_buffer_internal (buffer); | |
1972 | ||
d206af14 | 1973 | prepare_to_modify_buffer (start, end, NULL); |
b45433b3 | 1974 | |
a50df55b | 1975 | BUF_COMPUTE_UNCHANGED (buffer, start - 1, end); |
83010cd6 | 1976 | |
9fbf87cd | 1977 | if (MODIFF <= SAVE_MODIFF) |
83010cd6 | 1978 | record_first_change (); |
b45433b3 | 1979 | MODIFF++; |
3e145152 CY |
1980 | if (! preserve_chars_modiff) |
1981 | CHARS_MODIFF = MODIFF; | |
04a759c8 | 1982 | |
069cdc4f RS |
1983 | buffer->point_before_scroll = Qnil; |
1984 | ||
04a759c8 JB |
1985 | if (buffer != old_buffer) |
1986 | set_buffer_internal (old_buffer); | |
b45433b3 | 1987 | } |
d206af14 | 1988 | \f |
3be11131 RS |
1989 | /* Check that it is okay to modify the buffer between START and END, |
1990 | which are char positions. | |
1991 | ||
679194a6 JA |
1992 | Run the before-change-function, if any. If intervals are in use, |
1993 | verify that the text to be modified is not read-only, and call | |
d206af14 RS |
1994 | any modification properties the text may have. |
1995 | ||
1996 | If PRESERVE_PTR is nonzero, we relocate *PRESERVE_PTR | |
1997 | by holding its value temporarily in a marker. */ | |
b45433b3 | 1998 | |
c660b094 | 1999 | void |
9628fed7 SM |
2000 | prepare_to_modify_buffer (EMACS_INT start, EMACS_INT end, |
2001 | EMACS_INT *preserve_ptr) | |
b45433b3 | 2002 | { |
234fb773 CY |
2003 | struct buffer *base_buffer; |
2004 | ||
d427b66a | 2005 | if (!NILP (current_buffer->read_only)) |
b45433b3 JB |
2006 | Fbarf_if_buffer_read_only (); |
2007 | ||
2e9f55fd GM |
2008 | /* Let redisplay consider other windows than selected_window |
2009 | if modifying another buffer. */ | |
2010 | if (XBUFFER (XWINDOW (selected_window)->buffer) != current_buffer) | |
2011 | ++windows_or_buffers_changed; | |
2012 | ||
9fbf87cd | 2013 | if (BUF_INTERVALS (current_buffer) != 0) |
d206af14 RS |
2014 | { |
2015 | if (preserve_ptr) | |
2016 | { | |
2017 | Lisp_Object preserve_marker; | |
2018 | struct gcpro gcpro1; | |
2019 | preserve_marker = Fcopy_marker (make_number (*preserve_ptr), Qnil); | |
2020 | GCPRO1 (preserve_marker); | |
2021 | verify_interval_modification (current_buffer, start, end); | |
2022 | *preserve_ptr = marker_position (preserve_marker); | |
dab0b04d | 2023 | unchain_marker (XMARKER (preserve_marker)); |
d206af14 RS |
2024 | UNGCPRO; |
2025 | } | |
2026 | else | |
2027 | verify_interval_modification (current_buffer, start, end); | |
2028 | } | |
b45433b3 | 2029 | |
234fb773 CY |
2030 | /* For indirect buffers, use the base buffer to check clashes. */ |
2031 | if (current_buffer->base_buffer != 0) | |
2032 | base_buffer = current_buffer->base_buffer; | |
2033 | else | |
2034 | base_buffer = current_buffer; | |
2035 | ||
b45433b3 | 2036 | #ifdef CLASH_DETECTION |
234fb773 | 2037 | if (!NILP (base_buffer->file_truename) |
ab6c5c0c | 2038 | /* Make binding buffer-file-name to nil effective. */ |
234fb773 | 2039 | && !NILP (base_buffer->filename) |
9fbf87cd | 2040 | && SAVE_MODIFF >= MODIFF) |
234fb773 | 2041 | lock_file (base_buffer->file_truename); |
b45433b3 JB |
2042 | #else |
2043 | /* At least warn if this file has changed on disk since it was visited. */ | |
234fb773 | 2044 | if (!NILP (base_buffer->filename) |
9fbf87cd | 2045 | && SAVE_MODIFF >= MODIFF |
d427b66a | 2046 | && NILP (Fverify_visited_file_modtime (Fcurrent_buffer ())) |
234fb773 | 2047 | && !NILP (Ffile_exists_p (base_buffer->filename))) |
b45433b3 | 2048 | call1 (intern ("ask-user-about-supersession-threat"), |
234fb773 | 2049 | base_buffer->filename); |
b45433b3 JB |
2050 | #endif /* not CLASH_DETECTION */ |
2051 | ||
9852377f | 2052 | /* If `select-active-regions' is non-nil, save the region text. */ |
7c23dd44 CY |
2053 | if (!NILP (current_buffer->mark_active) |
2054 | && NILP (Vsaved_region_selection) | |
2055 | && (EQ (Vselect_active_regions, Qonly) | |
2056 | ? EQ (CAR_SAFE (Vtransient_mark_mode), Qonly) | |
2057 | : (!NILP (Vselect_active_regions) | |
2058 | && !NILP (Vtransient_mark_mode)))) | |
9852377f | 2059 | { |
746812d9 CY |
2060 | int b = XINT (Fmarker_position (current_buffer->mark)); |
2061 | int e = XINT (make_number (PT)); | |
2062 | if (b < e) | |
2063 | Vsaved_region_selection = make_buffer_string (b, e, 0); | |
2064 | else if (b > e) | |
2065 | Vsaved_region_selection = make_buffer_string (e, b, 0); | |
9852377f CY |
2066 | } |
2067 | ||
d206af14 | 2068 | signal_before_change (start, end, preserve_ptr); |
2f545eea | 2069 | |
56e1065e JB |
2070 | if (current_buffer->newline_cache) |
2071 | invalidate_region_cache (current_buffer, | |
2072 | current_buffer->newline_cache, | |
2073 | start - BEG, Z - end); | |
2074 | if (current_buffer->width_run_cache) | |
2075 | invalidate_region_cache (current_buffer, | |
2076 | current_buffer->width_run_cache, | |
2077 | start - BEG, Z - end); | |
2078 | ||
2f545eea | 2079 | Vdeactivate_mark = Qt; |
b45433b3 JB |
2080 | } |
2081 | \f | |
d206af14 RS |
2082 | /* These macros work with an argument named `preserve_ptr' |
2083 | and a local variable named `preserve_marker'. */ | |
2084 | ||
2085 | #define PRESERVE_VALUE \ | |
2086 | if (preserve_ptr && NILP (preserve_marker)) \ | |
2087 | preserve_marker = Fcopy_marker (make_number (*preserve_ptr), Qnil) | |
2088 | ||
2089 | #define RESTORE_VALUE \ | |
2090 | if (! NILP (preserve_marker)) \ | |
2091 | { \ | |
2092 | *preserve_ptr = marker_position (preserve_marker); \ | |
dab0b04d | 2093 | unchain_marker (XMARKER (preserve_marker)); \ |
d206af14 RS |
2094 | } |
2095 | ||
b86e0aaf RS |
2096 | #define PRESERVE_START_END \ |
2097 | if (NILP (start_marker)) \ | |
2098 | start_marker = Fcopy_marker (start, Qnil); \ | |
2099 | if (NILP (end_marker)) \ | |
2100 | end_marker = Fcopy_marker (end, Qnil); | |
2101 | ||
2102 | #define FETCH_START \ | |
2103 | (! NILP (start_marker) ? Fmarker_position (start_marker) : start) | |
2104 | ||
2105 | #define FETCH_END \ | |
2106 | (! NILP (end_marker) ? Fmarker_position (end_marker) : end) | |
2107 | ||
4a181359 | 2108 | /* Set a variable to nil if an error occurred. |
e6d3f090 SM |
2109 | Don't change the variable if there was no error. |
2110 | VAL is a cons-cell (VARIABLE . NO-ERROR-FLAG). | |
2111 | VARIABLE is the variable to maybe set to nil. | |
2112 | NO-ERROR-FLAG is nil if there was an error, | |
2113 | anything else meaning no error (so this function does nothing). */ | |
4a181359 | 2114 | Lisp_Object |
971de7fb | 2115 | reset_var_on_error (Lisp_Object val) |
4a181359 SM |
2116 | { |
2117 | if (NILP (XCDR (val))) | |
2118 | Fset (XCAR (val), Qnil); | |
2119 | return Qnil; | |
2120 | } | |
2121 | ||
eb8c3be9 | 2122 | /* Signal a change to the buffer immediately before it happens. |
d206af14 RS |
2123 | START_INT and END_INT are the bounds of the text to be changed. |
2124 | ||
2125 | If PRESERVE_PTR is nonzero, we relocate *PRESERVE_PTR | |
2126 | by holding its value temporarily in a marker. */ | |
b45433b3 | 2127 | |
c660b094 | 2128 | void |
ae19ba7c | 2129 | signal_before_change (EMACS_INT start_int, EMACS_INT end_int, |
9628fed7 | 2130 | EMACS_INT *preserve_ptr) |
b45433b3 | 2131 | { |
fb4ee5cd | 2132 | Lisp_Object start, end; |
b86e0aaf | 2133 | Lisp_Object start_marker, end_marker; |
d206af14 | 2134 | Lisp_Object preserve_marker; |
b86e0aaf | 2135 | struct gcpro gcpro1, gcpro2, gcpro3; |
4a181359 | 2136 | int count = SPECPDL_INDEX (); |
fb4ee5cd | 2137 | |
fd16a4c6 KH |
2138 | if (inhibit_modification_hooks) |
2139 | return; | |
2140 | ||
fb4ee5cd RS |
2141 | start = make_number (start_int); |
2142 | end = make_number (end_int); | |
d206af14 | 2143 | preserve_marker = Qnil; |
b86e0aaf RS |
2144 | start_marker = Qnil; |
2145 | end_marker = Qnil; | |
2146 | GCPRO3 (preserve_marker, start_marker, end_marker); | |
fb4ee5cd | 2147 | |
4a181359 SM |
2148 | specbind (Qinhibit_modification_hooks, Qt); |
2149 | ||
b45433b3 | 2150 | /* If buffer is unmodified, run a special hook for that case. */ |
9fbf87cd | 2151 | if (SAVE_MODIFF >= MODIFF |
dbc4e1c1 JB |
2152 | && !NILP (Vfirst_change_hook) |
2153 | && !NILP (Vrun_hooks)) | |
d206af14 RS |
2154 | { |
2155 | PRESERVE_VALUE; | |
b86e0aaf | 2156 | PRESERVE_START_END; |
d206af14 RS |
2157 | call1 (Vrun_hooks, Qfirst_change_hook); |
2158 | } | |
dbc4e1c1 | 2159 | |
3d1e2d9c | 2160 | /* Now run the before-change-functions if any. */ |
e45fb8bf RS |
2161 | if (!NILP (Vbefore_change_functions)) |
2162 | { | |
3d1e2d9c | 2163 | Lisp_Object args[3]; |
4a181359 | 2164 | Lisp_Object rvoe_arg = Fcons (Qbefore_change_functions, Qnil); |
3d1e2d9c | 2165 | |
d206af14 | 2166 | PRESERVE_VALUE; |
b86e0aaf | 2167 | PRESERVE_START_END; |
d206af14 | 2168 | |
4a181359 SM |
2169 | /* Mark before-change-functions to be reset to nil in case of error. */ |
2170 | record_unwind_protect (reset_var_on_error, rvoe_arg); | |
3d1e2d9c RS |
2171 | |
2172 | /* Actually run the hook functions. */ | |
2173 | args[0] = Qbefore_change_functions; | |
b86e0aaf RS |
2174 | args[1] = FETCH_START; |
2175 | args[2] = FETCH_END; | |
4a181359 | 2176 | Frun_hook_with_args (3, args); |
3d1e2d9c | 2177 | |
4a181359 SM |
2178 | /* There was no error: unarm the reset_on_error. */ |
2179 | XSETCDR (rvoe_arg, Qt); | |
e45fb8bf | 2180 | } |
d07c0804 | 2181 | |
fbebdf81 | 2182 | if (current_buffer->overlays_before || current_buffer->overlays_after) |
d206af14 RS |
2183 | { |
2184 | PRESERVE_VALUE; | |
b86e0aaf RS |
2185 | report_overlay_modification (FETCH_START, FETCH_END, 0, |
2186 | FETCH_START, FETCH_END, Qnil); | |
d206af14 RS |
2187 | } |
2188 | ||
b86e0aaf RS |
2189 | if (! NILP (start_marker)) |
2190 | free_marker (start_marker); | |
2191 | if (! NILP (end_marker)) | |
2192 | free_marker (end_marker); | |
d206af14 RS |
2193 | RESTORE_VALUE; |
2194 | UNGCPRO; | |
4a181359 SM |
2195 | |
2196 | unbind_to (count, Qnil); | |
b45433b3 JB |
2197 | } |
2198 | ||
eb8c3be9 | 2199 | /* Signal a change immediately after it happens. |
3be11131 | 2200 | CHARPOS is the character position of the start of the changed text. |
b45433b3 JB |
2201 | LENDEL is the number of characters of the text before the change. |
2202 | (Not the whole buffer; just the part that was changed.) | |
8b09e5d0 RS |
2203 | LENINS is the number of characters in that part of the text |
2204 | after the change. */ | |
b45433b3 | 2205 | |
c660b094 | 2206 | void |
ae19ba7c | 2207 | signal_after_change (EMACS_INT charpos, EMACS_INT lendel, EMACS_INT lenins) |
b45433b3 | 2208 | { |
4a181359 | 2209 | int count = SPECPDL_INDEX (); |
fd16a4c6 KH |
2210 | if (inhibit_modification_hooks) |
2211 | return; | |
2212 | ||
fb2e7d14 RS |
2213 | /* If we are deferring calls to the after-change functions |
2214 | and there are no before-change functions, | |
2215 | just record the args that we were going to use. */ | |
2216 | if (! NILP (Vcombine_after_change_calls) | |
1675d086 | 2217 | && NILP (Vbefore_change_functions) |
fbebdf81 SM |
2218 | && !current_buffer->overlays_before |
2219 | && !current_buffer->overlays_after) | |
fb2e7d14 RS |
2220 | { |
2221 | Lisp_Object elt; | |
2222 | ||
2223 | if (!NILP (combine_after_change_list) | |
2224 | && current_buffer != XBUFFER (combine_after_change_buffer)) | |
2225 | Fcombine_after_change_execute (); | |
2226 | ||
3be11131 RS |
2227 | elt = Fcons (make_number (charpos - BEG), |
2228 | Fcons (make_number (Z - (charpos - lendel + lenins)), | |
fb2e7d14 RS |
2229 | Fcons (make_number (lenins - lendel), Qnil))); |
2230 | combine_after_change_list | |
2231 | = Fcons (elt, combine_after_change_list); | |
2232 | combine_after_change_buffer = Fcurrent_buffer (); | |
2233 | ||
2234 | return; | |
2235 | } | |
2236 | ||
177c0ea7 | 2237 | if (!NILP (combine_after_change_list)) |
fb2e7d14 RS |
2238 | Fcombine_after_change_execute (); |
2239 | ||
4a181359 SM |
2240 | specbind (Qinhibit_modification_hooks, Qt); |
2241 | ||
e45fb8bf RS |
2242 | if (!NILP (Vafter_change_functions)) |
2243 | { | |
3d1e2d9c | 2244 | Lisp_Object args[4]; |
4a181359 SM |
2245 | Lisp_Object rvoe_arg = Fcons (Qafter_change_functions, Qnil); |
2246 | ||
2247 | /* Mark after-change-functions to be reset to nil in case of error. */ | |
2248 | record_unwind_protect (reset_var_on_error, rvoe_arg); | |
3d1e2d9c RS |
2249 | |
2250 | /* Actually run the hook functions. */ | |
2251 | args[0] = Qafter_change_functions; | |
3be11131 RS |
2252 | XSETFASTINT (args[1], charpos); |
2253 | XSETFASTINT (args[2], charpos + lenins); | |
3d1e2d9c | 2254 | XSETFASTINT (args[3], lendel); |
4a181359 | 2255 | Frun_hook_with_args (4, args); |
3d1e2d9c | 2256 | |
4a181359 SM |
2257 | /* There was no error: unarm the reset_on_error. */ |
2258 | XSETCDR (rvoe_arg, Qt); | |
e45fb8bf | 2259 | } |
d07c0804 | 2260 | |
fbebdf81 | 2261 | if (current_buffer->overlays_before || current_buffer->overlays_after) |
3be11131 RS |
2262 | report_overlay_modification (make_number (charpos), |
2263 | make_number (charpos + lenins), | |
d07c0804 | 2264 | 1, |
3be11131 RS |
2265 | make_number (charpos), |
2266 | make_number (charpos + lenins), | |
d07c0804 | 2267 | make_number (lendel)); |
c5ca0786 RS |
2268 | |
2269 | /* After an insertion, call the text properties | |
2270 | insert-behind-hooks or insert-in-front-hooks. */ | |
2271 | if (lendel == 0) | |
d6b81c0f AS |
2272 | report_interval_modification (make_number (charpos), |
2273 | make_number (charpos + lenins)); | |
4a181359 SM |
2274 | |
2275 | unbind_to (count, Qnil); | |
b45433b3 | 2276 | } |
fb2e7d14 RS |
2277 | |
2278 | Lisp_Object | |
971de7fb | 2279 | Fcombine_after_change_execute_1 (Lisp_Object val) |
fb2e7d14 RS |
2280 | { |
2281 | Vcombine_after_change_calls = val; | |
2282 | return val; | |
2283 | } | |
2284 | ||
2285 | DEFUN ("combine-after-change-execute", Fcombine_after_change_execute, | |
335c5470 PJ |
2286 | Scombine_after_change_execute, 0, 0, 0, |
2287 | doc: /* This function is for use internally in `combine-after-change-calls'. */) | |
5842a27b | 2288 | (void) |
fb2e7d14 | 2289 | { |
aed13378 | 2290 | int count = SPECPDL_INDEX (); |
ae19ba7c SM |
2291 | EMACS_INT beg, end, change; |
2292 | EMACS_INT begpos, endpos; | |
fb2e7d14 RS |
2293 | Lisp_Object tail; |
2294 | ||
101e446f KH |
2295 | if (NILP (combine_after_change_list)) |
2296 | return Qnil; | |
2297 | ||
c47a9ed1 CY |
2298 | /* It is rare for combine_after_change_buffer to be invalid, but |
2299 | possible. It can happen when combine-after-change-calls is | |
2300 | non-nil, and insertion calls a file handler (e.g. through | |
2301 | lock_file) which scribbles into a temp file -- cyd */ | |
2302 | if (!BUFFERP (combine_after_change_buffer) | |
2303 | || NILP (XBUFFER (combine_after_change_buffer)->name)) | |
2304 | { | |
2305 | combine_after_change_list = Qnil; | |
2306 | return Qnil; | |
2307 | } | |
2308 | ||
fb2e7d14 RS |
2309 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); |
2310 | ||
2311 | Fset_buffer (combine_after_change_buffer); | |
2312 | ||
2313 | /* # chars unchanged at beginning of buffer. */ | |
2314 | beg = Z - BEG; | |
2315 | /* # chars unchanged at end of buffer. */ | |
2316 | end = beg; | |
2317 | /* Total amount of insertion (negative for deletion). */ | |
2318 | change = 0; | |
2319 | ||
2320 | /* Scan the various individual changes, | |
2321 | accumulating the range info in BEG, END and CHANGE. */ | |
2322 | for (tail = combine_after_change_list; CONSP (tail); | |
03699b14 | 2323 | tail = XCDR (tail)) |
fb2e7d14 | 2324 | { |
e688a080 | 2325 | Lisp_Object elt; |
ae19ba7c | 2326 | EMACS_INT thisbeg, thisend, thischange; |
fb2e7d14 RS |
2327 | |
2328 | /* Extract the info from the next element. */ | |
03699b14 | 2329 | elt = XCAR (tail); |
fb2e7d14 RS |
2330 | if (! CONSP (elt)) |
2331 | continue; | |
03699b14 | 2332 | thisbeg = XINT (XCAR (elt)); |
fb2e7d14 | 2333 | |
03699b14 | 2334 | elt = XCDR (elt); |
fb2e7d14 RS |
2335 | if (! CONSP (elt)) |
2336 | continue; | |
03699b14 | 2337 | thisend = XINT (XCAR (elt)); |
fb2e7d14 | 2338 | |
03699b14 | 2339 | elt = XCDR (elt); |
fb2e7d14 RS |
2340 | if (! CONSP (elt)) |
2341 | continue; | |
03699b14 | 2342 | thischange = XINT (XCAR (elt)); |
fb2e7d14 RS |
2343 | |
2344 | /* Merge this range into the accumulated range. */ | |
2345 | change += thischange; | |
2346 | if (thisbeg < beg) | |
2347 | beg = thisbeg; | |
2348 | if (thisend < end) | |
2349 | end = thisend; | |
2350 | } | |
2351 | ||
2352 | /* Get the current start and end positions of the range | |
2353 | that was changed. */ | |
2354 | begpos = BEG + beg; | |
2355 | endpos = Z - end; | |
177c0ea7 | 2356 | |
fb2e7d14 RS |
2357 | /* We are about to handle these, so discard them. */ |
2358 | combine_after_change_list = Qnil; | |
2359 | ||
2360 | /* Now run the after-change functions for real. | |
2361 | Turn off the flag that defers them. */ | |
2362 | record_unwind_protect (Fcombine_after_change_execute_1, | |
2363 | Vcombine_after_change_calls); | |
2364 | signal_after_change (begpos, endpos - begpos - change, endpos - begpos); | |
0ef71121 | 2365 | update_compositions (begpos, endpos, CHECK_ALL); |
fb2e7d14 | 2366 | |
101e446f | 2367 | return unbind_to (count, Qnil); |
fb2e7d14 RS |
2368 | } |
2369 | \f | |
dfcf069d | 2370 | void |
971de7fb | 2371 | syms_of_insdel (void) |
fb2e7d14 RS |
2372 | { |
2373 | staticpro (&combine_after_change_list); | |
bf0bf758 | 2374 | staticpro (&combine_after_change_buffer); |
fb2e7d14 | 2375 | combine_after_change_list = Qnil; |
101e446f | 2376 | combine_after_change_buffer = Qnil; |
fb2e7d14 | 2377 | |
60ea6052 | 2378 | DEFVAR_BOOL ("check-markers-debug-flag", &check_markers_debug_flag, |
335c5470 | 2379 | doc: /* Non-nil means enable debugging checks for invalid marker positions. */); |
60ea6052 | 2380 | check_markers_debug_flag = 0; |
fb2e7d14 | 2381 | DEFVAR_LISP ("combine-after-change-calls", &Vcombine_after_change_calls, |
335c5470 | 2382 | doc: /* Used internally by the `combine-after-change-calls' macro. */); |
fb2e7d14 RS |
2383 | Vcombine_after_change_calls = Qnil; |
2384 | ||
7baf49cf | 2385 | DEFVAR_BOOL ("inhibit-modification-hooks", &inhibit_modification_hooks, |
335c5470 PJ |
2386 | doc: /* Non-nil means don't run any of the hooks that respond to buffer changes. |
2387 | This affects `before-change-functions' and `after-change-functions', | |
2388 | as well as hooks attached to text properties and overlays. */); | |
7baf49cf | 2389 | inhibit_modification_hooks = 0; |
d67b4f80 | 2390 | Qinhibit_modification_hooks = intern_c_string ("inhibit-modification-hooks"); |
27ea0af2 | 2391 | staticpro (&Qinhibit_modification_hooks); |
7baf49cf | 2392 | |
fb2e7d14 RS |
2393 | defsubr (&Scombine_after_change_execute); |
2394 | } | |
6b61353c KH |
2395 | |
2396 | /* arch-tag: 9b34b886-47d7-465e-a234-299af411b23d | |
2397 | (do not change this comment) */ |