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, |
5df4f04c | 3 | 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 |
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 | 55 | |
fb2e7d14 RS |
56 | /* List of elements of the form (BEG-UNCHANGED END-UNCHANGED CHANGE-AMOUNT) |
57 | describing changes which happened while combine_after_change_calls | |
58 | was nonzero. We use this to decide how to call them | |
59 | once the deferral ends. | |
60 | ||
61 | In each element. | |
62 | BEG-UNCHANGED is the number of chars before the changed range. | |
63 | END-UNCHANGED is the number of chars after the changed range, | |
64 | and CHANGE-AMOUNT is the number of characters inserted by the change | |
65 | (negative for a deletion). */ | |
66 | Lisp_Object combine_after_change_list; | |
67 | ||
68 | /* Buffer which combine_after_change_list is about. */ | |
69 | Lisp_Object combine_after_change_buffer; | |
27ea0af2 GM |
70 | |
71 | Lisp_Object Qinhibit_modification_hooks; | |
2b083808 | 72 | \f |
60ea6052 RS |
73 | #define CHECK_MARKERS() \ |
74 | if (check_markers_debug_flag) \ | |
75 | check_markers (); \ | |
76 | else | |
77 | ||
78 | void | |
971de7fb | 79 | check_markers (void) |
60ea6052 | 80 | { |
dab0b04d | 81 | register struct Lisp_Marker *tail; |
9f3ede3c | 82 | int multibyte = ! NILP (current_buffer->enable_multibyte_characters); |
60ea6052 | 83 | |
dab0b04d | 84 | for (tail = BUF_MARKERS (current_buffer); tail; tail = tail->next) |
60ea6052 | 85 | { |
dab0b04d | 86 | if (tail->buffer->text != current_buffer->text) |
60ea6052 | 87 | abort (); |
dab0b04d | 88 | if (tail->charpos > Z) |
60ea6052 | 89 | abort (); |
dab0b04d | 90 | if (tail->bytepos > Z_BYTE) |
60ea6052 | 91 | abort (); |
dab0b04d | 92 | if (multibyte && ! CHAR_HEAD_P (FETCH_BYTE (tail->bytepos))) |
9f3ede3c | 93 | abort (); |
60ea6052 RS |
94 | } |
95 | } | |
96 | \f | |
3be11131 | 97 | /* Move gap to position CHARPOS. |
b45433b3 JB |
98 | Note that this can quit! */ |
99 | ||
c660b094 | 100 | void |
ae19ba7c | 101 | move_gap (EMACS_INT charpos) |
b45433b3 | 102 | { |
3be11131 | 103 | move_gap_both (charpos, charpos_to_bytepos (charpos)); |
b45433b3 JB |
104 | } |
105 | ||
3be11131 RS |
106 | /* Move gap to byte position BYTEPOS, which is also char position CHARPOS. |
107 | Note that this can quit! */ | |
108 | ||
109 | void | |
ae19ba7c | 110 | move_gap_both (EMACS_INT charpos, EMACS_INT bytepos) |
3be11131 RS |
111 | { |
112 | if (bytepos < GPT_BYTE) | |
113 | gap_left (charpos, bytepos, 0); | |
114 | else if (bytepos > GPT_BYTE) | |
115 | gap_right (charpos, bytepos); | |
116 | } | |
117 | ||
118 | /* Move the gap to a position less than the current GPT. | |
119 | BYTEPOS describes the new position as a byte position, | |
120 | and CHARPOS is the corresponding char position. | |
b45433b3 JB |
121 | If NEWGAP is nonzero, then don't update beg_unchanged and end_unchanged. */ |
122 | ||
2bcaed71 | 123 | static void |
ae19ba7c | 124 | gap_left (EMACS_INT charpos, EMACS_INT bytepos, int newgap) |
b45433b3 JB |
125 | { |
126 | register unsigned char *to, *from; | |
ae19ba7c SM |
127 | register EMACS_INT i; |
128 | EMACS_INT new_s1; | |
b45433b3 | 129 | |
b45433b3 | 130 | if (!newgap) |
a50df55b | 131 | BUF_COMPUTE_UNCHANGED (current_buffer, charpos, GPT); |
b45433b3 | 132 | |
3be11131 | 133 | i = GPT_BYTE; |
b45433b3 JB |
134 | to = GAP_END_ADDR; |
135 | from = GPT_ADDR; | |
3be11131 | 136 | new_s1 = GPT_BYTE; |
b45433b3 JB |
137 | |
138 | /* Now copy the characters. To move the gap down, | |
139 | copy characters up. */ | |
140 | ||
141 | while (1) | |
142 | { | |
143 | /* I gets number of characters left to copy. */ | |
3be11131 | 144 | i = new_s1 - bytepos; |
b45433b3 JB |
145 | if (i == 0) |
146 | break; | |
147 | /* If a quit is requested, stop copying now. | |
3be11131 | 148 | Change BYTEPOS to be where we have actually moved the gap to. */ |
b45433b3 JB |
149 | if (QUITP) |
150 | { | |
3be11131 RS |
151 | bytepos = new_s1; |
152 | charpos = BYTE_TO_CHAR (bytepos); | |
b45433b3 JB |
153 | break; |
154 | } | |
155 | /* Move at most 32000 chars before checking again for a quit. */ | |
156 | if (i > 32000) | |
157 | i = 32000; | |
72af86bd AS |
158 | new_s1 -= i; |
159 | from -= i, to -= i; | |
160 | memmove (to, from, i); | |
b45433b3 JB |
161 | } |
162 | ||
3be11131 RS |
163 | /* Adjust markers, and buffer data structure, to put the gap at BYTEPOS. |
164 | BYTEPOS is where the loop above stopped, which may be what was specified | |
b45433b3 | 165 | or may be where a quit was detected. */ |
3be11131 RS |
166 | adjust_markers_gap_motion (bytepos, GPT_BYTE, GAP_SIZE); |
167 | GPT_BYTE = bytepos; | |
168 | GPT = charpos; | |
169 | if (bytepos < charpos) | |
170 | abort (); | |
469ff680 | 171 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
b45433b3 JB |
172 | QUIT; |
173 | } | |
174 | ||
2b34df4e | 175 | /* Move the gap to a position greater than the current GPT. |
3be11131 RS |
176 | BYTEPOS describes the new position as a byte position, |
177 | and CHARPOS is the corresponding char position. */ | |
178 | ||
2bcaed71 | 179 | static void |
ae19ba7c | 180 | gap_right (EMACS_INT charpos, EMACS_INT bytepos) |
b45433b3 JB |
181 | { |
182 | register unsigned char *to, *from; | |
ae19ba7c SM |
183 | register EMACS_INT i; |
184 | EMACS_INT new_s1; | |
b45433b3 | 185 | |
a50df55b | 186 | BUF_COMPUTE_UNCHANGED (current_buffer, charpos, GPT); |
b45433b3 | 187 | |
3be11131 | 188 | i = GPT_BYTE; |
b45433b3 JB |
189 | from = GAP_END_ADDR; |
190 | to = GPT_ADDR; | |
3be11131 | 191 | new_s1 = GPT_BYTE; |
b45433b3 JB |
192 | |
193 | /* Now copy the characters. To move the gap up, | |
194 | copy characters down. */ | |
195 | ||
196 | while (1) | |
197 | { | |
198 | /* I gets number of characters left to copy. */ | |
3be11131 | 199 | i = bytepos - new_s1; |
b45433b3 JB |
200 | if (i == 0) |
201 | break; | |
202 | /* If a quit is requested, stop copying now. | |
3be11131 | 203 | Change BYTEPOS to be where we have actually moved the gap to. */ |
b45433b3 JB |
204 | if (QUITP) |
205 | { | |
3be11131 RS |
206 | bytepos = new_s1; |
207 | charpos = BYTE_TO_CHAR (bytepos); | |
b45433b3 JB |
208 | break; |
209 | } | |
210 | /* Move at most 32000 chars before checking again for a quit. */ | |
211 | if (i > 32000) | |
212 | i = 32000; | |
72af86bd AS |
213 | new_s1 += i; |
214 | memmove (to, from, i); | |
215 | from += i, to += i; | |
b45433b3 JB |
216 | } |
217 | ||
3be11131 RS |
218 | adjust_markers_gap_motion (GPT_BYTE + GAP_SIZE, bytepos + GAP_SIZE, |
219 | - GAP_SIZE); | |
220 | GPT = charpos; | |
221 | GPT_BYTE = bytepos; | |
222 | if (bytepos < charpos) | |
223 | abort (); | |
469ff680 | 224 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
b45433b3 JB |
225 | QUIT; |
226 | } | |
2b083808 | 227 | \f |
3be11131 RS |
228 | /* Add AMOUNT to the byte position of every marker in the current buffer |
229 | whose current byte position is between FROM (exclusive) and TO (inclusive). | |
8948d317 | 230 | |
b45433b3 JB |
231 | Also, any markers past the outside of that interval, in the direction |
232 | of adjustment, are first moved back to the near end of the interval | |
8948d317 RS |
233 | and then adjusted by AMOUNT. |
234 | ||
235 | When the latter adjustment is done, if AMOUNT is negative, | |
236 | we record the adjustment for undo. (This case happens only for | |
3be11131 RS |
237 | deletion.) |
238 | ||
239 | The markers' character positions are not altered, | |
240 | because gap motion does not affect character positions. */ | |
241 | ||
242 | int adjust_markers_test; | |
b45433b3 | 243 | |
2bcaed71 | 244 | static void |
ae19ba7c | 245 | adjust_markers_gap_motion (EMACS_INT from, EMACS_INT to, EMACS_INT amount) |
b45433b3 | 246 | { |
80f6e77c RS |
247 | /* Now that a marker has a bytepos, not counting the gap, |
248 | nothing needs to be done here. */ | |
249 | #if 0 | |
b45433b3 JB |
250 | Lisp_Object marker; |
251 | register struct Lisp_Marker *m; | |
ae19ba7c | 252 | register EMACS_INT mpos; |
b45433b3 | 253 | |
9fbf87cd | 254 | marker = BUF_MARKERS (current_buffer); |
b45433b3 | 255 | |
d427b66a | 256 | while (!NILP (marker)) |
b45433b3 JB |
257 | { |
258 | m = XMARKER (marker); | |
80f6e77c | 259 | mpos = m->bytepos; |
b45433b3 JB |
260 | if (amount > 0) |
261 | { | |
262 | if (mpos > to && mpos < to + amount) | |
3be11131 RS |
263 | { |
264 | if (adjust_markers_test) | |
265 | abort (); | |
266 | mpos = to + amount; | |
267 | } | |
b45433b3 JB |
268 | } |
269 | else | |
270 | { | |
8948d317 RS |
271 | /* Here's the case where a marker is inside text being deleted. |
272 | AMOUNT can be negative for gap motion, too, | |
273 | but then this range contains no markers. */ | |
b45433b3 | 274 | if (mpos > from + amount && mpos <= from) |
8948d317 | 275 | { |
3be11131 RS |
276 | if (adjust_markers_test) |
277 | abort (); | |
278 | mpos = from + amount; | |
8948d317 | 279 | } |
b45433b3 JB |
280 | } |
281 | if (mpos > from && mpos <= to) | |
282 | mpos += amount; | |
283 | m->bufpos = mpos; | |
284 | marker = m->chain; | |
285 | } | |
80f6e77c | 286 | #endif |
b45433b3 | 287 | } |
2b083808 | 288 | \f |
3be11131 RS |
289 | /* Adjust all markers for a deletion |
290 | whose range in bytes is FROM_BYTE to TO_BYTE. | |
291 | The range in charpos is FROM to TO. | |
292 | ||
293 | This function assumes that the gap is adjacent to | |
294 | or inside of the range being deleted. */ | |
beecb55b | 295 | |
809f3d51 | 296 | void |
ae19ba7c SM |
297 | adjust_markers_for_delete (EMACS_INT from, EMACS_INT from_byte, |
298 | EMACS_INT to, EMACS_INT to_byte) | |
3be11131 RS |
299 | { |
300 | Lisp_Object marker; | |
301 | register struct Lisp_Marker *m; | |
ae19ba7c | 302 | register EMACS_INT charpos; |
3be11131 | 303 | |
dab0b04d | 304 | for (m = BUF_MARKERS (current_buffer); m; m = m->next) |
3be11131 | 305 | { |
3be11131 RS |
306 | charpos = m->charpos; |
307 | ||
308 | if (charpos > Z) | |
309 | abort (); | |
310 | ||
311 | /* If the marker is after the deletion, | |
80f6e77c | 312 | relocate by number of chars / bytes deleted. */ |
3be11131 | 313 | if (charpos > to) |
80f6e77c RS |
314 | { |
315 | m->charpos -= to - from; | |
316 | m->bytepos -= to_byte - from_byte; | |
317 | } | |
80f6e77c | 318 | /* Here's the case where a marker is inside text being deleted. */ |
3be11131 RS |
319 | else if (charpos > from) |
320 | { | |
00de2987 | 321 | if (! m->insertion_type) |
dab0b04d | 322 | { /* Normal markers will end up at the beginning of the |
00de2987 | 323 | re-inserted text after undoing a deletion, and must be |
177c0ea7 | 324 | adjusted to move them to the correct place. */ |
dab0b04d | 325 | XSETMISC (marker, m); |
28259cac | 326 | record_marker_adjustment (marker, from - charpos); |
dab0b04d | 327 | } |
00de2987 | 328 | else if (charpos < to) |
dab0b04d | 329 | { /* Before-insertion markers will automatically move forward |
00de2987 MB |
330 | upon re-inserting the deleted text, so we have to arrange |
331 | for them to move backward to the correct position. */ | |
dab0b04d | 332 | XSETMISC (marker, m); |
28259cac | 333 | record_marker_adjustment (marker, to - charpos); |
dab0b04d | 334 | } |
3be11131 | 335 | m->charpos = from; |
80f6e77c | 336 | m->bytepos = from_byte; |
3be11131 | 337 | } |
00de2987 MB |
338 | /* Here's the case where a before-insertion marker is immediately |
339 | before the deleted region. */ | |
340 | else if (charpos == from && m->insertion_type) | |
341 | { | |
342 | /* Undoing the change uses normal insertion, which will | |
343 | incorrectly make MARKER move forward, so we arrange for it | |
344 | to then move backward to the correct place at the beginning | |
345 | of the deleted region. */ | |
dab0b04d | 346 | XSETMISC (marker, m); |
00de2987 MB |
347 | record_marker_adjustment (marker, to - from); |
348 | } | |
3be11131 RS |
349 | } |
350 | } | |
23b20a70 | 351 | |
2b083808 | 352 | \f |
432f78d2 RS |
353 | /* Adjust markers for an insertion that stretches from FROM / FROM_BYTE |
354 | to TO / TO_BYTE. We have to relocate the charpos of every marker | |
355 | that points after the insertion (but not their bytepos). | |
3be11131 | 356 | |
3be11131 RS |
357 | When a marker points at the insertion point, |
358 | we advance it if either its insertion-type is t | |
359 | or BEFORE_MARKERS is true. */ | |
360 | ||
361 | static void | |
ae19ba7c SM |
362 | adjust_markers_for_insert (EMACS_INT from, EMACS_INT from_byte, |
363 | EMACS_INT to, EMACS_INT to_byte, int before_markers) | |
beecb55b | 364 | { |
dab0b04d | 365 | struct Lisp_Marker *m; |
469ff680 | 366 | int adjusted = 0; |
ae19ba7c SM |
367 | EMACS_INT nchars = to - from; |
368 | EMACS_INT nbytes = to_byte - from_byte; | |
beecb55b | 369 | |
dab0b04d | 370 | for (m = BUF_MARKERS (current_buffer); m; m = m->next) |
beecb55b | 371 | { |
86a56ef3 SM |
372 | eassert (m->bytepos >= m->charpos |
373 | && m->bytepos - m->charpos <= Z_BYTE - Z); | |
1f90a790 | 374 | |
432f78d2 | 375 | if (m->bytepos == from_byte) |
469ff680 | 376 | { |
432f78d2 RS |
377 | if (m->insertion_type || before_markers) |
378 | { | |
b16afa45 KH |
379 | m->bytepos = to_byte; |
380 | m->charpos = to; | |
432f78d2 RS |
381 | if (m->insertion_type) |
382 | adjusted = 1; | |
383 | } | |
ce97a2d7 | 384 | } |
80f6e77c RS |
385 | else if (m->bytepos > from_byte) |
386 | { | |
387 | m->bytepos += nbytes; | |
b16afa45 | 388 | m->charpos += nchars; |
80f6e77c | 389 | } |
beecb55b | 390 | } |
3be11131 RS |
391 | |
392 | /* Adjusting only markers whose insertion-type is t may result in | |
409f2919 | 393 | - disordered start and end in overlays, and |
6b61353c | 394 | - disordered overlays in the slot `overlays_before' of current_buffer. */ |
469ff680 | 395 | if (adjusted) |
6b61353c KH |
396 | { |
397 | fix_start_end_in_overlays(from, to); | |
398 | fix_overlays_before (current_buffer, from, to); | |
399 | } | |
beecb55b RS |
400 | } |
401 | ||
3be11131 RS |
402 | /* Adjust point for an insertion of NBYTES bytes, which are NCHARS characters. |
403 | ||
404 | This is used only when the value of point changes due to an insert | |
405 | or delete; it does not represent a conceptual change in point as a | |
406 | marker. In particular, point is not crossing any interval | |
407 | boundaries, so there's no need to use the usual SET_PT macro. In | |
408 | fact it would be incorrect to do so, because either the old or the | |
409 | new value of point is out of sync with the current set of | |
410 | intervals. */ | |
411 | ||
a27a38d8 | 412 | static void |
ae19ba7c | 413 | adjust_point (EMACS_INT nchars, EMACS_INT nbytes) |
a27a38d8 | 414 | { |
3be11131 RS |
415 | BUF_PT (current_buffer) += nchars; |
416 | BUF_PT_BYTE (current_buffer) += nbytes; | |
417 | ||
418 | /* In a single-byte buffer, the two positions must be equal. */ | |
86a56ef3 | 419 | eassert (PT_BYTE >= PT && PT_BYTE - PT <= ZV_BYTE - ZV); |
a27a38d8 | 420 | } |
b45433b3 | 421 | \f |
652838b5 KH |
422 | /* Adjust markers for a replacement of a text at FROM (FROM_BYTE) of |
423 | length OLD_CHARS (OLD_BYTES) to a new text of length NEW_CHARS | |
adee4f91 KH |
424 | (NEW_BYTES). It is assumed that OLD_CHARS > 0, i.e., this is not |
425 | an insertion. */ | |
652838b5 KH |
426 | |
427 | static void | |
ae19ba7c SM |
428 | adjust_markers_for_replace (EMACS_INT from, EMACS_INT from_byte, |
429 | EMACS_INT old_chars, EMACS_INT old_bytes, | |
430 | EMACS_INT new_chars, EMACS_INT new_bytes) | |
652838b5 | 431 | { |
dab0b04d | 432 | register struct Lisp_Marker *m; |
ae19ba7c SM |
433 | EMACS_INT prev_to_byte = from_byte + old_bytes; |
434 | EMACS_INT diff_chars = new_chars - old_chars; | |
435 | EMACS_INT diff_bytes = new_bytes - old_bytes; | |
652838b5 | 436 | |
dab0b04d | 437 | for (m = BUF_MARKERS (current_buffer); m; m = m->next) |
652838b5 | 438 | { |
adee4f91 | 439 | if (m->bytepos >= prev_to_byte) |
652838b5 | 440 | { |
adee4f91 KH |
441 | m->charpos += diff_chars; |
442 | m->bytepos += diff_bytes; | |
652838b5 | 443 | } |
adee4f91 | 444 | else if (m->bytepos > from_byte) |
652838b5 | 445 | { |
652838b5 | 446 | m->charpos = from; |
b16afa45 | 447 | m->bytepos = from_byte; |
652838b5 | 448 | } |
652838b5 | 449 | } |
3019692c KH |
450 | |
451 | CHECK_MARKERS (); | |
652838b5 KH |
452 | } |
453 | ||
454 | \f | |
3be11131 | 455 | /* Make the gap NBYTES_ADDED bytes longer. */ |
b45433b3 | 456 | |
c660b094 | 457 | void |
ae19ba7c | 458 | make_gap_larger (EMACS_INT nbytes_added) |
b45433b3 | 459 | { |
b45433b3 | 460 | Lisp_Object tem; |
ae19ba7c SM |
461 | EMACS_INT real_gap_loc; |
462 | EMACS_INT real_gap_loc_byte; | |
463 | EMACS_INT old_gap_size; | |
b45433b3 JB |
464 | |
465 | /* If we have to get more space, get enough to last a while. */ | |
3be11131 | 466 | nbytes_added += 2000; |
b45433b3 | 467 | |
87e32266 SM |
468 | { EMACS_INT total_size = Z_BYTE - BEG_BYTE + GAP_SIZE + nbytes_added; |
469 | if (total_size < 0 | |
470 | /* Don't allow a buffer size that won't fit in a Lisp integer. */ | |
471 | || total_size != XINT (make_number (total_size)) | |
472 | /* Don't allow a buffer size that won't fit in an int | |
473 | even if it will fit in a Lisp integer. | |
474 | That won't work because so many places still use `int'. */ | |
475 | || total_size != (EMACS_INT) (int) total_size) | |
476 | error ("Buffer exceeds maximum size"); | |
477 | } | |
94056516 | 478 | |
71a7bfa7 | 479 | enlarge_buffer_text (current_buffer, nbytes_added); |
b45433b3 JB |
480 | |
481 | /* Prevent quitting in move_gap. */ | |
482 | tem = Vinhibit_quit; | |
483 | Vinhibit_quit = Qt; | |
484 | ||
485 | real_gap_loc = GPT; | |
3be11131 | 486 | real_gap_loc_byte = GPT_BYTE; |
b45433b3 JB |
487 | old_gap_size = GAP_SIZE; |
488 | ||
489 | /* Call the newly allocated space a gap at the end of the whole space. */ | |
490 | GPT = Z + GAP_SIZE; | |
7d92db58 | 491 | GPT_BYTE = Z_BYTE + GAP_SIZE; |
3be11131 | 492 | GAP_SIZE = nbytes_added; |
b45433b3 JB |
493 | |
494 | /* Move the new gap down to be consecutive with the end of the old one. | |
495 | This adjusts the markers properly too. */ | |
3be11131 | 496 | gap_left (real_gap_loc + old_gap_size, real_gap_loc_byte + old_gap_size, 1); |
b45433b3 JB |
497 | |
498 | /* Now combine the two into one large gap. */ | |
499 | GAP_SIZE += old_gap_size; | |
500 | GPT = real_gap_loc; | |
3be11131 | 501 | GPT_BYTE = real_gap_loc_byte; |
b45433b3 | 502 | |
469ff680 KH |
503 | /* Put an anchor. */ |
504 | *(Z_ADDR) = 0; | |
505 | ||
b45433b3 JB |
506 | Vinhibit_quit = tem; |
507 | } | |
8af5b8e7 AI |
508 | |
509 | ||
7273faa1 | 510 | /* Make the gap NBYTES_REMOVED bytes shorter. */ |
8af5b8e7 AI |
511 | |
512 | void | |
ae19ba7c | 513 | make_gap_smaller (EMACS_INT nbytes_removed) |
8af5b8e7 AI |
514 | { |
515 | Lisp_Object tem; | |
ae19ba7c SM |
516 | EMACS_INT real_gap_loc; |
517 | EMACS_INT real_gap_loc_byte; | |
518 | EMACS_INT real_Z; | |
519 | EMACS_INT real_Z_byte; | |
520 | EMACS_INT real_beg_unchanged; | |
521 | EMACS_INT new_gap_size; | |
8af5b8e7 AI |
522 | |
523 | /* Make sure the gap is at least 20 bytes. */ | |
524 | if (GAP_SIZE - nbytes_removed < 20) | |
525 | nbytes_removed = GAP_SIZE - 20; | |
526 | ||
527 | /* Prevent quitting in move_gap. */ | |
528 | tem = Vinhibit_quit; | |
529 | Vinhibit_quit = Qt; | |
530 | ||
531 | real_gap_loc = GPT; | |
532 | real_gap_loc_byte = GPT_BYTE; | |
73df3b72 | 533 | new_gap_size = GAP_SIZE - nbytes_removed; |
8af5b8e7 AI |
534 | real_Z = Z; |
535 | real_Z_byte = Z_BYTE; | |
73df3b72 | 536 | real_beg_unchanged = BEG_UNCHANGED; |
8af5b8e7 AI |
537 | |
538 | /* Pretend that the last unwanted part of the gap is the entire gap, | |
539 | and that the first desired part of the gap is part of the buffer | |
540 | text. */ | |
72af86bd | 541 | memset (GPT_ADDR, 0, new_gap_size); |
73df3b72 KS |
542 | GPT += new_gap_size; |
543 | GPT_BYTE += new_gap_size; | |
544 | Z += new_gap_size; | |
545 | Z_BYTE += new_gap_size; | |
8af5b8e7 AI |
546 | GAP_SIZE = nbytes_removed; |
547 | ||
548 | /* Move the unwanted pretend gap to the end of the buffer. This | |
549 | adjusts the markers properly too. */ | |
550 | gap_right (Z, Z_BYTE); | |
551 | ||
552 | enlarge_buffer_text (current_buffer, -nbytes_removed); | |
553 | ||
554 | /* Now restore the desired gap. */ | |
73df3b72 | 555 | GAP_SIZE = new_gap_size; |
8af5b8e7 AI |
556 | GPT = real_gap_loc; |
557 | GPT_BYTE = real_gap_loc_byte; | |
558 | Z = real_Z; | |
559 | Z_BYTE = real_Z_byte; | |
73df3b72 | 560 | BEG_UNCHANGED = real_beg_unchanged; |
8af5b8e7 AI |
561 | |
562 | /* Put an anchor. */ | |
563 | *(Z_ADDR) = 0; | |
564 | ||
565 | Vinhibit_quit = tem; | |
566 | } | |
567 | ||
568 | void | |
ae19ba7c | 569 | make_gap (EMACS_INT nbytes_added) |
8af5b8e7 AI |
570 | { |
571 | if (nbytes_added >= 0) | |
572 | make_gap_larger (nbytes_added); | |
d77fbc16 | 573 | #if defined USE_MMAP_FOR_BUFFERS || defined REL_ALLOC || defined DOUG_LEA_MALLOC |
8af5b8e7 AI |
574 | else |
575 | make_gap_smaller (-nbytes_added); | |
576 | #endif | |
577 | } | |
b45433b3 | 578 | \f |
2b083808 RS |
579 | /* Copy NBYTES bytes of text from FROM_ADDR to TO_ADDR. |
580 | FROM_MULTIBYTE says whether the incoming text is multibyte. | |
581 | TO_MULTIBYTE says whether to store the text as multibyte. | |
582 | If FROM_MULTIBYTE != TO_MULTIBYTE, we convert. | |
583 | ||
584 | Return the number of bytes stored at TO_ADDR. */ | |
585 | ||
ae19ba7c SM |
586 | EMACS_INT |
587 | copy_text (const unsigned char *from_addr, unsigned char *to_addr, | |
588 | EMACS_INT nbytes, int from_multibyte, int to_multibyte) | |
2b083808 RS |
589 | { |
590 | if (from_multibyte == to_multibyte) | |
591 | { | |
72af86bd | 592 | memcpy (to_addr, from_addr, nbytes); |
2b083808 RS |
593 | return nbytes; |
594 | } | |
595 | else if (from_multibyte) | |
596 | { | |
ae19ba7c SM |
597 | EMACS_INT nchars = 0; |
598 | EMACS_INT bytes_left = nbytes; | |
6021f7c5 | 599 | Lisp_Object tbl = Qnil; |
f44cbcd8 | 600 | |
2b083808 RS |
601 | while (bytes_left > 0) |
602 | { | |
b16afa45 | 603 | int thislen, c; |
62a6e103 | 604 | c = STRING_CHAR_AND_LENGTH (from_addr, thislen); |
1ede3eb6 KH |
605 | if (! ASCII_CHAR_P (c)) |
606 | c &= 0xFF; | |
f44cbcd8 | 607 | *to_addr++ = c; |
2b083808 | 608 | from_addr += thislen; |
7e79b8e0 | 609 | bytes_left -= thislen; |
2b083808 RS |
610 | nchars++; |
611 | } | |
612 | return nchars; | |
613 | } | |
614 | else | |
615 | { | |
616 | unsigned char *initial_to_addr = to_addr; | |
617 | ||
618 | /* Convert single-byte to multibyte. */ | |
619 | while (nbytes > 0) | |
620 | { | |
621 | int c = *from_addr++; | |
2b083808 | 622 | |
4c0354d7 | 623 | if (!ASCII_CHAR_P (c)) |
2b083808 | 624 | { |
4c0354d7 | 625 | c = BYTE8_TO_CHAR (c); |
0ef71121 | 626 | to_addr += CHAR_STRING (c, to_addr); |
2b083808 RS |
627 | nbytes--; |
628 | } | |
629 | else | |
630 | /* Special case for speed. */ | |
631 | *to_addr++ = c, nbytes--; | |
632 | } | |
633 | return to_addr - initial_to_addr; | |
634 | } | |
635 | } | |
636 | ||
637 | /* Return the number of bytes it would take | |
638 | to convert some single-byte text to multibyte. | |
639 | The single-byte text consists of NBYTES bytes at PTR. */ | |
640 | ||
ae19ba7c SM |
641 | EMACS_INT |
642 | count_size_as_multibyte (const unsigned char *ptr, EMACS_INT nbytes) | |
2b083808 | 643 | { |
ae19ba7c SM |
644 | EMACS_INT i; |
645 | EMACS_INT outgoing_nbytes = 0; | |
2b083808 RS |
646 | |
647 | for (i = 0; i < nbytes; i++) | |
648 | { | |
649 | unsigned int c = *ptr++; | |
59a52d50 | 650 | |
4c0354d7 | 651 | if (ASCII_CHAR_P (c)) |
59a52d50 KH |
652 | outgoing_nbytes++; |
653 | else | |
2b083808 | 654 | { |
4c0354d7 | 655 | c = BYTE8_TO_CHAR (c); |
643044eb | 656 | outgoing_nbytes += CHAR_BYTES (c); |
2b083808 | 657 | } |
2b083808 RS |
658 | } |
659 | ||
660 | return outgoing_nbytes; | |
661 | } | |
662 | \f | |
b45433b3 | 663 | /* Insert a string of specified length before point. |
2b083808 RS |
664 | This function judges multibyteness based on |
665 | enable_multibyte_characters in the current buffer; | |
666 | it never converts between single-byte and multibyte. | |
667 | ||
ef29f213 KH |
668 | DO NOT use this for the contents of a Lisp string or a Lisp buffer! |
669 | prepare_to_modify_buffer could relocate the text. */ | |
b45433b3 | 670 | |
c660b094 | 671 | void |
ae19ba7c | 672 | insert (const unsigned char *string, EMACS_INT nbytes) |
b45433b3 | 673 | { |
3be11131 | 674 | if (nbytes > 0) |
395ec62e | 675 | { |
ae19ba7c | 676 | EMACS_INT len = chars_in_text (string, nbytes), opoint; |
bab3eee1 EZ |
677 | insert_1_both (string, len, nbytes, 0, 1, 0); |
678 | opoint = PT - len; | |
679 | signal_after_change (opoint, 0, len); | |
0ef71121 | 680 | update_compositions (opoint, PT, CHECK_BORDER); |
cd11ef31 RS |
681 | } |
682 | } | |
683 | ||
2b083808 RS |
684 | /* Likewise, but inherit text properties from neighboring characters. */ |
685 | ||
c660b094 | 686 | void |
ae19ba7c | 687 | insert_and_inherit (const unsigned char *string, EMACS_INT nbytes) |
cd11ef31 | 688 | { |
3be11131 | 689 | if (nbytes > 0) |
cd11ef31 | 690 | { |
ae19ba7c | 691 | EMACS_INT len = chars_in_text (string, nbytes), opoint; |
bab3eee1 EZ |
692 | insert_1_both (string, len, nbytes, 1, 1, 0); |
693 | opoint = PT - len; | |
694 | signal_after_change (opoint, 0, len); | |
0ef71121 | 695 | update_compositions (opoint, PT, CHECK_BORDER); |
395ec62e KH |
696 | } |
697 | } | |
b45433b3 | 698 | |
2b083808 | 699 | /* Insert the character C before point. Do not inherit text properties. */ |
3be11131 | 700 | |
c660b094 | 701 | void |
ae19ba7c | 702 | insert_char (int c) |
3be11131 | 703 | { |
0ef71121 | 704 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
2b083808 RS |
705 | int len; |
706 | ||
707 | if (! NILP (current_buffer->enable_multibyte_characters)) | |
0ef71121 | 708 | len = CHAR_STRING (c, str); |
2b083808 RS |
709 | else |
710 | { | |
711 | len = 1; | |
0ef71121 | 712 | str[0] = c; |
2b083808 | 713 | } |
3be11131 RS |
714 | |
715 | insert (str, len); | |
716 | } | |
717 | ||
2b083808 | 718 | /* Insert the null-terminated string S before point. */ |
3be11131 RS |
719 | |
720 | void | |
ae19ba7c | 721 | insert_string (const char *s) |
3be11131 RS |
722 | { |
723 | insert (s, strlen (s)); | |
724 | } | |
725 | ||
726 | /* Like `insert' except that all markers pointing at the place where | |
727 | the insertion happens are adjusted to point after it. | |
728 | Don't use this function to insert part of a Lisp string, | |
729 | since gc could happen and relocate it. */ | |
730 | ||
731 | void | |
ae19ba7c | 732 | insert_before_markers (const unsigned char *string, EMACS_INT nbytes) |
3be11131 RS |
733 | { |
734 | if (nbytes > 0) | |
735 | { | |
ae19ba7c | 736 | EMACS_INT len = chars_in_text (string, nbytes), opoint; |
bab3eee1 EZ |
737 | insert_1_both (string, len, nbytes, 0, 1, 1); |
738 | opoint = PT - len; | |
739 | signal_after_change (opoint, 0, len); | |
0ef71121 | 740 | update_compositions (opoint, PT, CHECK_BORDER); |
3be11131 RS |
741 | } |
742 | } | |
743 | ||
2b083808 RS |
744 | /* Likewise, but inherit text properties from neighboring characters. */ |
745 | ||
3be11131 | 746 | void |
ae19ba7c SM |
747 | insert_before_markers_and_inherit (const unsigned char *string, |
748 | EMACS_INT nbytes) | |
3be11131 RS |
749 | { |
750 | if (nbytes > 0) | |
751 | { | |
ae19ba7c | 752 | EMACS_INT len = chars_in_text (string, nbytes), opoint; |
bab3eee1 EZ |
753 | insert_1_both (string, len, nbytes, 1, 1, 1); |
754 | opoint = PT - len; | |
755 | signal_after_change (opoint, 0, len); | |
0ef71121 | 756 | update_compositions (opoint, PT, CHECK_BORDER); |
3be11131 RS |
757 | } |
758 | } | |
1f90a790 | 759 | |
3be11131 RS |
760 | /* Subroutine used by the insert functions above. */ |
761 | ||
762 | void | |
ae19ba7c SM |
763 | insert_1 (const unsigned char *string, EMACS_INT nbytes, |
764 | int inherit, int prepare, int before_markers) | |
395ec62e | 765 | { |
432f78d2 RS |
766 | insert_1_both (string, chars_in_text (string, nbytes), nbytes, |
767 | inherit, prepare, before_markers); | |
768 | } | |
b16afa45 | 769 | |
1f90a790 | 770 | \f |
b16afa45 KH |
771 | #ifdef BYTE_COMBINING_DEBUG |
772 | ||
432f78d2 RS |
773 | /* See if the bytes before POS/POS_BYTE combine with bytes |
774 | at the start of STRING to form a single character. | |
ce97a2d7 | 775 | If so, return the number of bytes at the start of STRING |
432f78d2 | 776 | which combine in this way. Otherwise, return 0. */ |
b45433b3 | 777 | |
432f78d2 | 778 | int |
ae19ba7c SM |
779 | count_combining_before (const unsigned char *string, EMACS_INT length, |
780 | EMACS_INT pos, EMACS_INT pos_byte) | |
432f78d2 | 781 | { |
cae184f2 | 782 | int len, combining_bytes; |
641a26d2 | 783 | const unsigned char *p; |
b45433b3 | 784 | |
432f78d2 RS |
785 | if (NILP (current_buffer->enable_multibyte_characters)) |
786 | return 0; | |
cae184f2 KH |
787 | |
788 | /* At first, we can exclude the following cases: | |
789 | (1) STRING[0] can't be a following byte of multibyte sequence. | |
790 | (2) POS is the start of the current buffer. | |
791 | (3) A character before POS is not a multibyte character. */ | |
792 | if (length == 0 || CHAR_HEAD_P (*string)) /* case (1) */ | |
432f78d2 | 793 | return 0; |
cae184f2 | 794 | if (pos_byte == BEG_BYTE) /* case (2) */ |
432f78d2 | 795 | return 0; |
cae184f2 KH |
796 | len = 1; |
797 | p = BYTE_POS_ADDR (pos_byte - 1); | |
798 | while (! CHAR_HEAD_P (*p)) p--, len++; | |
409f2919 | 799 | if (! LEADING_CODE_P (*p)) /* case (3) */ |
432f78d2 | 800 | return 0; |
cae184f2 | 801 | |
cae184f2 KH |
802 | combining_bytes = BYTES_BY_CHAR_HEAD (*p) - len; |
803 | if (combining_bytes <= 0) | |
804 | /* The character preceding POS is, complete and no room for | |
805 | combining bytes (combining_bytes == 0), or an independent 8-bit | |
806 | character (combining_bytes < 0). */ | |
432f78d2 | 807 | return 0; |
ce97a2d7 | 808 | |
cae184f2 KH |
809 | /* We have a combination situation. Count the bytes at STRING that |
810 | may combine. */ | |
811 | p = string + 1; | |
ce97a2d7 RS |
812 | while (!CHAR_HEAD_P (*p) && p < string + length) |
813 | p++; | |
814 | ||
cae184f2 | 815 | return (combining_bytes < p - string ? combining_bytes : p - string); |
432f78d2 | 816 | } |
b45433b3 | 817 | |
432f78d2 RS |
818 | /* See if the bytes after POS/POS_BYTE combine with bytes |
819 | at the end of STRING to form a single character. | |
820 | If so, return the number of bytes after POS/POS_BYTE | |
821 | which combine in this way. Otherwise, return 0. */ | |
679194a6 | 822 | |
432f78d2 | 823 | int |
ae19ba7c SM |
824 | count_combining_after (const unsigned char *string, |
825 | EMACS_INT length, EMACS_INT pos, EMACS_INT pos_byte) | |
432f78d2 | 826 | { |
ae19ba7c SM |
827 | EMACS_INT opos_byte = pos_byte; |
828 | EMACS_INT i; | |
829 | EMACS_INT bytes; | |
cae184f2 | 830 | unsigned char *bufp; |
3be11131 | 831 | |
432f78d2 RS |
832 | if (NILP (current_buffer->enable_multibyte_characters)) |
833 | return 0; | |
cae184f2 KH |
834 | |
835 | /* At first, we can exclude the following cases: | |
836 | (1) The last byte of STRING is an ASCII. | |
837 | (2) POS is the last of the current buffer. | |
838 | (3) A character at POS can't be a following byte of multibyte | |
839 | character. */ | |
840 | if (length > 0 && ASCII_BYTE_P (string[length - 1])) /* case (1) */ | |
841 | return 0; | |
842 | if (pos_byte == Z_BYTE) /* case (2) */ | |
432f78d2 | 843 | return 0; |
cae184f2 KH |
844 | bufp = BYTE_POS_ADDR (pos_byte); |
845 | if (CHAR_HEAD_P (*bufp)) /* case (3) */ | |
846 | return 0; | |
847 | ||
432f78d2 | 848 | i = length - 1; |
b57a7b0b | 849 | while (i >= 0 && ! CHAR_HEAD_P (string[i])) |
432f78d2 RS |
850 | { |
851 | i--; | |
852 | } | |
b57a7b0b KH |
853 | if (i < 0) |
854 | { | |
cae184f2 KH |
855 | /* All characters in STRING are not character head. We must |
856 | check also preceding bytes at POS. We are sure that the gap | |
857 | is at POS. */ | |
858 | unsigned char *p = BEG_ADDR; | |
b57a7b0b | 859 | i = pos_byte - 2; |
cae184f2 | 860 | while (i >= 0 && ! CHAR_HEAD_P (p[i])) |
b57a7b0b | 861 | i--; |
409f2919 | 862 | if (i < 0 || !LEADING_CODE_P (p[i])) |
b57a7b0b | 863 | return 0; |
0ef71121 | 864 | |
cae184f2 KH |
865 | bytes = BYTES_BY_CHAR_HEAD (p[i]); |
866 | return (bytes <= pos_byte - 1 - i + length | |
867 | ? 0 | |
868 | : bytes - (pos_byte - 1 - i + length)); | |
b57a7b0b | 869 | } |
409f2919 | 870 | if (!LEADING_CODE_P (string[i])) |
432f78d2 RS |
871 | return 0; |
872 | ||
cae184f2 KH |
873 | bytes = BYTES_BY_CHAR_HEAD (string[i]) - (length - i); |
874 | bufp++, pos_byte++; | |
875 | while (!CHAR_HEAD_P (*bufp)) bufp++, pos_byte++; | |
cd11ef31 | 876 | |
cae184f2 | 877 | return (bytes <= pos_byte - opos_byte ? bytes : pos_byte - opos_byte); |
b45433b3 | 878 | } |
2b083808 | 879 | |
b16afa45 | 880 | #endif |
9f3ede3c | 881 | |
1f90a790 | 882 | \f |
2b083808 RS |
883 | /* Insert a sequence of NCHARS chars which occupy NBYTES bytes |
884 | starting at STRING. INHERIT, PREPARE and BEFORE_MARKERS | |
885 | are the same as in insert_1. */ | |
886 | ||
887 | void | |
ae19ba7c SM |
888 | insert_1_both (const unsigned char *string, |
889 | EMACS_INT nchars, EMACS_INT nbytes, | |
890 | int inherit, int prepare, int before_markers) | |
2b083808 | 891 | { |
da80a8d5 GM |
892 | if (nchars == 0) |
893 | return; | |
177c0ea7 | 894 | |
57404188 KH |
895 | if (NILP (current_buffer->enable_multibyte_characters)) |
896 | nchars = nbytes; | |
897 | ||
35d63725 RS |
898 | if (prepare) |
899 | /* Do this before moving and increasing the gap, | |
900 | because the before-change hooks might move the gap | |
901 | or make it smaller. */ | |
902 | prepare_to_modify_buffer (PT, PT, NULL); | |
903 | ||
2b083808 RS |
904 | if (PT != GPT) |
905 | move_gap_both (PT, PT_BYTE); | |
906 | if (GAP_SIZE < nbytes) | |
907 | make_gap (nbytes - GAP_SIZE); | |
908 | ||
b16afa45 KH |
909 | #ifdef BYTE_COMBINING_DEBUG |
910 | if (count_combining_before (string, nbytes, PT, PT_BYTE) | |
911 | || count_combining_after (string, nbytes, PT, PT_BYTE)) | |
912 | abort (); | |
913 | #endif | |
432f78d2 RS |
914 | |
915 | /* Record deletion of the surrounding text that combines with | |
916 | the insertion. This, together with recording the insertion, | |
b16afa45 KH |
917 | will add up to the right stuff in the undo list. */ |
918 | record_insert (PT, nchars); | |
2b083808 | 919 | MODIFF++; |
3e145152 | 920 | CHARS_MODIFF = MODIFF; |
2b083808 | 921 | |
72af86bd | 922 | memcpy (GPT_ADDR, string, nbytes); |
2b083808 | 923 | |
2b083808 | 924 | GAP_SIZE -= nbytes; |
1f90a790 RS |
925 | GPT += nchars; |
926 | ZV += nchars; | |
927 | Z += nchars; | |
2b083808 RS |
928 | GPT_BYTE += nbytes; |
929 | ZV_BYTE += nbytes; | |
930 | Z_BYTE += nbytes; | |
931 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ | |
1f90a790 | 932 | |
1f90a790 RS |
933 | if (GPT_BYTE < GPT) |
934 | abort (); | |
935 | ||
9dde4e0c KS |
936 | /* The insert may have been in the unchanged region, so check again. */ |
937 | if (Z - GPT < END_UNCHANGED) | |
938 | END_UNCHANGED = Z - GPT; | |
939 | ||
1f90a790 | 940 | adjust_overlays_for_insert (PT, nchars); |
432f78d2 | 941 | adjust_markers_for_insert (PT, PT_BYTE, |
1f90a790 | 942 | PT + nchars, PT_BYTE + nbytes, |
2b083808 | 943 | before_markers); |
ce97a2d7 | 944 | |
1f90a790 | 945 | if (BUF_INTERVALS (current_buffer) != 0) |
1f90a790 RS |
946 | offset_intervals (current_buffer, PT, nchars); |
947 | ||
ce97a2d7 | 948 | if (!inherit && BUF_INTERVALS (current_buffer) != 0) |
f2cab2ea GM |
949 | set_text_properties (make_number (PT), make_number (PT + nchars), |
950 | Qnil, Qnil, Qnil); | |
ce97a2d7 | 951 | |
b16afa45 | 952 | adjust_point (nchars, nbytes); |
828f1ed3 KH |
953 | |
954 | CHECK_MARKERS (); | |
2b083808 | 955 | } |
3be11131 | 956 | \f |
679194a6 | 957 | /* Insert the part of the text of STRING, a Lisp object assumed to be |
2b083808 RS |
958 | of type string, consisting of the LENGTH characters (LENGTH_BYTE bytes) |
959 | starting at position POS / POS_BYTE. If the text of STRING has properties, | |
960 | copy them into the buffer. | |
679194a6 JA |
961 | |
962 | It does not work to use `insert' for this, because a GC could happen | |
72af86bd | 963 | before we copy the stuff into the buffer, and relocate the string |
7e1ea612 | 964 | without insert noticing. */ |
679194a6 | 965 | |
c660b094 | 966 | void |
ae19ba7c SM |
967 | insert_from_string (Lisp_Object string, EMACS_INT pos, EMACS_INT pos_byte, |
968 | EMACS_INT length, EMACS_INT length_byte, int inherit) | |
395ec62e | 969 | { |
ae19ba7c | 970 | EMACS_INT opoint = PT; |
d8bf4256 RS |
971 | |
972 | if (SCHARS (string) == 0) | |
973 | return; | |
974 | ||
62b82678 RS |
975 | insert_from_string_1 (string, pos, pos_byte, length, length_byte, |
976 | inherit, 0); | |
977 | signal_after_change (opoint, 0, PT - opoint); | |
0ef71121 | 978 | update_compositions (opoint, PT, CHECK_BORDER); |
395ec62e KH |
979 | } |
980 | ||
2b083808 RS |
981 | /* Like `insert_from_string' except that all markers pointing |
982 | at the place where the insertion happens are adjusted to point after it. */ | |
3be11131 RS |
983 | |
984 | void | |
ae19ba7c SM |
985 | insert_from_string_before_markers (Lisp_Object string, |
986 | EMACS_INT pos, EMACS_INT pos_byte, | |
987 | EMACS_INT length, EMACS_INT length_byte, | |
988 | int inherit) | |
3be11131 | 989 | { |
ae19ba7c | 990 | EMACS_INT opoint = PT; |
d8bf4256 RS |
991 | |
992 | if (SCHARS (string) == 0) | |
993 | return; | |
994 | ||
62b82678 RS |
995 | insert_from_string_1 (string, pos, pos_byte, length, length_byte, |
996 | inherit, 1); | |
997 | signal_after_change (opoint, 0, PT - opoint); | |
0ef71121 | 998 | update_compositions (opoint, PT, CHECK_BORDER); |
3be11131 RS |
999 | } |
1000 | ||
1001 | /* Subroutine of the insertion functions above. */ | |
1002 | ||
1003 | static void | |
ae19ba7c SM |
1004 | insert_from_string_1 (Lisp_Object string, EMACS_INT pos, EMACS_INT pos_byte, |
1005 | EMACS_INT nchars, EMACS_INT nbytes, | |
1006 | int inherit, int before_markers) | |
b45433b3 | 1007 | { |
b45433b3 | 1008 | struct gcpro gcpro1; |
ae19ba7c | 1009 | EMACS_INT outgoing_nbytes = nbytes; |
ce97a2d7 | 1010 | INTERVAL intervals; |
2b083808 RS |
1011 | |
1012 | /* Make OUTGOING_NBYTES describe the text | |
1013 | as it will be inserted in this buffer. */ | |
1014 | ||
1015 | if (NILP (current_buffer->enable_multibyte_characters)) | |
1016 | outgoing_nbytes = nchars; | |
2a1d8be0 | 1017 | else if (! STRING_MULTIBYTE (string)) |
2b083808 | 1018 | outgoing_nbytes |
f7e233a8 | 1019 | = count_size_as_multibyte (SDATA (string) + pos_byte, |
2b083808 | 1020 | nbytes); |
b45433b3 | 1021 | |
b45433b3 | 1022 | GCPRO1 (string); |
35d63725 RS |
1023 | /* Do this before moving and increasing the gap, |
1024 | because the before-change hooks might move the gap | |
1025 | or make it smaller. */ | |
d206af14 | 1026 | prepare_to_modify_buffer (PT, PT, NULL); |
b45433b3 | 1027 | |
2bcaed71 | 1028 | if (PT != GPT) |
3be11131 | 1029 | move_gap_both (PT, PT_BYTE); |
534b9840 | 1030 | if (GAP_SIZE < outgoing_nbytes) |
2b083808 | 1031 | make_gap (outgoing_nbytes - GAP_SIZE); |
b45433b3 JB |
1032 | UNGCPRO; |
1033 | ||
2b083808 RS |
1034 | /* Copy the string text into the buffer, perhaps converting |
1035 | between single-byte and multibyte. */ | |
d5db4077 | 1036 | copy_text (SDATA (string) + pos_byte, GPT_ADDR, nbytes, |
2a1d8be0 | 1037 | STRING_MULTIBYTE (string), |
2b083808 | 1038 | ! NILP (current_buffer->enable_multibyte_characters)); |
b45433b3 | 1039 | |
b16afa45 | 1040 | #ifdef BYTE_COMBINING_DEBUG |
432f78d2 RS |
1041 | /* We have copied text into the gap, but we have not altered |
1042 | PT or PT_BYTE yet. So we can pass PT and PT_BYTE | |
1043 | to these functions and get the same results as we would | |
1044 | have got earlier on. Meanwhile, PT_ADDR does point to | |
1045 | the text that has been stored by copy_text. */ | |
b16afa45 KH |
1046 | if (count_combining_before (GPT_ADDR, outgoing_nbytes, PT, PT_BYTE) |
1047 | || count_combining_after (GPT_ADDR, outgoing_nbytes, PT, PT_BYTE)) | |
1048 | abort (); | |
1049 | #endif | |
432f78d2 | 1050 | |
b16afa45 | 1051 | record_insert (PT, nchars); |
432f78d2 | 1052 | MODIFF++; |
3e145152 | 1053 | CHARS_MODIFF = MODIFF; |
432f78d2 | 1054 | |
7792090e | 1055 | GAP_SIZE -= outgoing_nbytes; |
1f90a790 RS |
1056 | GPT += nchars; |
1057 | ZV += nchars; | |
1058 | Z += nchars; | |
2b083808 RS |
1059 | GPT_BYTE += outgoing_nbytes; |
1060 | ZV_BYTE += outgoing_nbytes; | |
1061 | Z_BYTE += outgoing_nbytes; | |
469ff680 | 1062 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
3be11131 RS |
1063 | |
1064 | if (GPT_BYTE < GPT) | |
1065 | abort (); | |
679194a6 | 1066 | |
9dde4e0c KS |
1067 | /* The insert may have been in the unchanged region, so check again. */ |
1068 | if (Z - GPT < END_UNCHANGED) | |
1069 | END_UNCHANGED = Z - GPT; | |
1070 | ||
1f90a790 RS |
1071 | adjust_overlays_for_insert (PT, nchars); |
1072 | adjust_markers_for_insert (PT, PT_BYTE, PT + nchars, | |
1073 | PT_BYTE + outgoing_nbytes, | |
1f90a790 | 1074 | before_markers); |
ce97a2d7 | 1075 | |
1f90a790 RS |
1076 | offset_intervals (current_buffer, PT, nchars); |
1077 | ||
d5db4077 | 1078 | intervals = STRING_INTERVALS (string); |
b16afa45 | 1079 | /* Get the intervals for the part of the string we are inserting. */ |
d5db4077 | 1080 | if (nbytes < SBYTES (string)) |
1f90a790 | 1081 | intervals = copy_intervals (intervals, pos, nchars); |
177c0ea7 | 1082 | |
ce97a2d7 | 1083 | /* Insert those intervals. */ |
1f90a790 | 1084 | graft_intervals_into_buffer (intervals, PT, nchars, |
9391e591 | 1085 | current_buffer, inherit); |
ce97a2d7 | 1086 | |
b16afa45 | 1087 | adjust_point (nchars, outgoing_nbytes); |
8f924df7 KH |
1088 | |
1089 | CHECK_MARKERS (); | |
1090 | } | |
1091 | \f | |
1092 | /* Insert a sequence of NCHARS chars which occupy NBYTES bytes | |
1093 | starting at GPT_ADDR. */ | |
1094 | ||
1095 | void | |
ae19ba7c | 1096 | insert_from_gap (EMACS_INT nchars, EMACS_INT nbytes) |
8f924df7 KH |
1097 | { |
1098 | if (NILP (current_buffer->enable_multibyte_characters)) | |
1099 | nchars = nbytes; | |
1100 | ||
1101 | record_insert (GPT, nchars); | |
1102 | MODIFF++; | |
1103 | ||
1104 | GAP_SIZE -= nbytes; | |
1105 | GPT += nchars; | |
1106 | ZV += nchars; | |
1107 | Z += nchars; | |
1108 | GPT_BYTE += nbytes; | |
1109 | ZV_BYTE += nbytes; | |
1110 | Z_BYTE += nbytes; | |
1111 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ | |
1112 | ||
1113 | if (GPT_BYTE < GPT) | |
1114 | abort (); | |
1115 | ||
c669988b KH |
1116 | adjust_overlays_for_insert (GPT - nchars, nchars); |
1117 | adjust_markers_for_insert (GPT - nchars, GPT_BYTE - nbytes, | |
1118 | GPT, GPT_BYTE, 0); | |
8f924df7 KH |
1119 | |
1120 | if (BUF_INTERVALS (current_buffer) != 0) | |
c669988b KH |
1121 | { |
1122 | offset_intervals (current_buffer, GPT - nchars, nchars); | |
1123 | graft_intervals_into_buffer (NULL_INTERVAL, GPT - nchars, nchars, | |
1124 | current_buffer, 0); | |
1125 | } | |
8f924df7 KH |
1126 | |
1127 | if (GPT - nchars < PT) | |
1128 | adjust_point (nchars, nbytes); | |
1129 | ||
1130 | CHECK_MARKERS (); | |
b45433b3 | 1131 | } |
3be11131 RS |
1132 | \f |
1133 | /* Insert text from BUF, NCHARS characters starting at CHARPOS, into the | |
ef29f213 KH |
1134 | current buffer. If the text in BUF has properties, they are absorbed |
1135 | into the current buffer. | |
1136 | ||
1137 | It does not work to use `insert' for this, because a malloc could happen | |
72af86bd | 1138 | and relocate BUF's text before the copy happens. */ |
ef29f213 KH |
1139 | |
1140 | void | |
ae19ba7c SM |
1141 | insert_from_buffer (struct buffer *buf, |
1142 | EMACS_INT charpos, EMACS_INT nchars, int inherit) | |
ef29f213 | 1143 | { |
ae19ba7c | 1144 | EMACS_INT opoint = PT; |
3be11131 | 1145 | |
62b82678 RS |
1146 | insert_from_buffer_1 (buf, charpos, nchars, inherit); |
1147 | signal_after_change (opoint, 0, PT - opoint); | |
0ef71121 | 1148 | update_compositions (opoint, PT, CHECK_BORDER); |
ef29f213 KH |
1149 | } |
1150 | ||
1151 | static void | |
ae19ba7c SM |
1152 | insert_from_buffer_1 (struct buffer *buf, |
1153 | EMACS_INT from, EMACS_INT nchars, int inherit) | |
ef29f213 | 1154 | { |
0aa8c4b2 | 1155 | register Lisp_Object temp; |
ae19ba7c SM |
1156 | EMACS_INT chunk, chunk_expanded; |
1157 | EMACS_INT from_byte = buf_charpos_to_bytepos (buf, from); | |
1158 | EMACS_INT to_byte = buf_charpos_to_bytepos (buf, from + nchars); | |
1159 | EMACS_INT incoming_nbytes = to_byte - from_byte; | |
1160 | EMACS_INT outgoing_nbytes = incoming_nbytes; | |
ce97a2d7 | 1161 | INTERVAL intervals; |
2b083808 RS |
1162 | |
1163 | /* Make OUTGOING_NBYTES describe the text | |
1164 | as it will be inserted in this buffer. */ | |
1165 | ||
1166 | if (NILP (current_buffer->enable_multibyte_characters)) | |
1167 | outgoing_nbytes = nchars; | |
1168 | else if (NILP (buf->enable_multibyte_characters)) | |
4468c4f1 | 1169 | { |
ae19ba7c SM |
1170 | EMACS_INT outgoing_before_gap = 0; |
1171 | EMACS_INT outgoing_after_gap = 0; | |
ef29f213 | 1172 | |
4468c4f1 KH |
1173 | if (from < BUF_GPT (buf)) |
1174 | { | |
1175 | chunk = BUF_GPT_BYTE (buf) - from_byte; | |
1176 | if (chunk > incoming_nbytes) | |
1177 | chunk = incoming_nbytes; | |
1178 | outgoing_before_gap | |
1179 | = count_size_as_multibyte (BUF_BYTE_ADDRESS (buf, from_byte), | |
1180 | chunk); | |
1181 | } | |
1182 | else | |
1183 | chunk = 0; | |
1184 | ||
1185 | if (chunk < incoming_nbytes) | |
1186 | outgoing_after_gap | |
177c0ea7 | 1187 | = count_size_as_multibyte (BUF_BYTE_ADDRESS (buf, |
4468c4f1 KH |
1188 | from_byte + chunk), |
1189 | incoming_nbytes - chunk); | |
1190 | ||
1191 | outgoing_nbytes = outgoing_before_gap + outgoing_after_gap; | |
1192 | } | |
177c0ea7 | 1193 | |
ef29f213 | 1194 | /* Make sure point-max won't overflow after this insertion. */ |
2b083808 RS |
1195 | XSETINT (temp, outgoing_nbytes + Z); |
1196 | if (outgoing_nbytes + Z != XINT (temp)) | |
3be11131 | 1197 | error ("Maximum buffer size exceeded"); |
ef29f213 | 1198 | |
35d63725 RS |
1199 | /* Do this before moving and increasing the gap, |
1200 | because the before-change hooks might move the gap | |
1201 | or make it smaller. */ | |
d206af14 | 1202 | prepare_to_modify_buffer (PT, PT, NULL); |
ef29f213 KH |
1203 | |
1204 | if (PT != GPT) | |
3be11131 | 1205 | move_gap_both (PT, PT_BYTE); |
2b083808 RS |
1206 | if (GAP_SIZE < outgoing_nbytes) |
1207 | make_gap (outgoing_nbytes - GAP_SIZE); | |
ef29f213 | 1208 | |
3be11131 | 1209 | if (from < BUF_GPT (buf)) |
ef29f213 | 1210 | { |
3be11131 | 1211 | chunk = BUF_GPT_BYTE (buf) - from_byte; |
2b083808 RS |
1212 | if (chunk > incoming_nbytes) |
1213 | chunk = incoming_nbytes; | |
4468c4f1 KH |
1214 | /* Record number of output bytes, so we know where |
1215 | to put the output from the second copy_text. */ | |
1216 | chunk_expanded | |
1217 | = copy_text (BUF_BYTE_ADDRESS (buf, from_byte), | |
1218 | GPT_ADDR, chunk, | |
1219 | ! NILP (buf->enable_multibyte_characters), | |
1220 | ! NILP (current_buffer->enable_multibyte_characters)); | |
ef29f213 KH |
1221 | } |
1222 | else | |
4468c4f1 KH |
1223 | chunk_expanded = chunk = 0; |
1224 | ||
2b083808 RS |
1225 | if (chunk < incoming_nbytes) |
1226 | copy_text (BUF_BYTE_ADDRESS (buf, from_byte + chunk), | |
4468c4f1 | 1227 | GPT_ADDR + chunk_expanded, incoming_nbytes - chunk, |
2b083808 RS |
1228 | ! NILP (buf->enable_multibyte_characters), |
1229 | ! NILP (current_buffer->enable_multibyte_characters)); | |
ef29f213 | 1230 | |
b16afa45 | 1231 | #ifdef BYTE_COMBINING_DEBUG |
432f78d2 RS |
1232 | /* We have copied text into the gap, but we have not altered |
1233 | PT or PT_BYTE yet. So we can pass PT and PT_BYTE | |
1234 | to these functions and get the same results as we would | |
1f90a790 | 1235 | have got earlier on. Meanwhile, GPT_ADDR does point to |
432f78d2 | 1236 | the text that has been stored by copy_text. */ |
b16afa45 KH |
1237 | if (count_combining_before (GPT_ADDR, outgoing_nbytes, PT, PT_BYTE) |
1238 | || count_combining_after (GPT_ADDR, outgoing_nbytes, PT, PT_BYTE)) | |
1239 | abort (); | |
1240 | #endif | |
432f78d2 | 1241 | |
b16afa45 | 1242 | record_insert (PT, nchars); |
432f78d2 | 1243 | MODIFF++; |
3e145152 | 1244 | CHARS_MODIFF = MODIFF; |
432f78d2 | 1245 | |
2b083808 | 1246 | GAP_SIZE -= outgoing_nbytes; |
1f90a790 RS |
1247 | GPT += nchars; |
1248 | ZV += nchars; | |
1249 | Z += nchars; | |
2b083808 RS |
1250 | GPT_BYTE += outgoing_nbytes; |
1251 | ZV_BYTE += outgoing_nbytes; | |
1252 | Z_BYTE += outgoing_nbytes; | |
469ff680 | 1253 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
1f90a790 | 1254 | |
1f90a790 RS |
1255 | if (GPT_BYTE < GPT) |
1256 | abort (); | |
1257 | ||
9dde4e0c KS |
1258 | /* The insert may have been in the unchanged region, so check again. */ |
1259 | if (Z - GPT < END_UNCHANGED) | |
1260 | END_UNCHANGED = Z - GPT; | |
1261 | ||
1f90a790 RS |
1262 | adjust_overlays_for_insert (PT, nchars); |
1263 | adjust_markers_for_insert (PT, PT_BYTE, PT + nchars, | |
432f78d2 | 1264 | PT_BYTE + outgoing_nbytes, |
b16afa45 | 1265 | 0); |
ce97a2d7 | 1266 | |
1f90a790 RS |
1267 | if (BUF_INTERVALS (current_buffer) != 0) |
1268 | offset_intervals (current_buffer, PT, nchars); | |
ce97a2d7 | 1269 | |
b16afa45 | 1270 | /* Get the intervals for the part of the string we are inserting. */ |
ce97a2d7 | 1271 | intervals = BUF_INTERVALS (buf); |
f1a6b216 | 1272 | if (nchars < BUF_Z (buf) - BUF_BEG (buf)) |
06d8227a GM |
1273 | { |
1274 | if (buf == current_buffer && PT <= from) | |
1275 | from += nchars; | |
1276 | intervals = copy_intervals (intervals, from, nchars); | |
1277 | } | |
177c0ea7 | 1278 | |
ce97a2d7 | 1279 | /* Insert those intervals. */ |
1f90a790 | 1280 | graft_intervals_into_buffer (intervals, PT, nchars, current_buffer, inherit); |
ce97a2d7 | 1281 | |
b16afa45 | 1282 | adjust_point (nchars, outgoing_nbytes); |
b45433b3 JB |
1283 | } |
1284 | \f | |
652838b5 KH |
1285 | /* Record undo information and adjust markers and position keepers for |
1286 | a replacement of a text PREV_TEXT at FROM to a new text of LEN | |
1287 | chars (LEN_BYTE bytes) which resides in the gap just after | |
1288 | GPT_ADDR. | |
1289 | ||
1290 | PREV_TEXT nil means the new text was just inserted. */ | |
2d9eea44 | 1291 | |
1e9c7b7d | 1292 | void |
ae19ba7c SM |
1293 | adjust_after_replace (EMACS_INT from, EMACS_INT from_byte, |
1294 | Lisp_Object prev_text, EMACS_INT len, EMACS_INT len_byte) | |
1e9c7b7d | 1295 | { |
ae19ba7c | 1296 | EMACS_INT nchars_del = 0, nbytes_del = 0; |
61415a25 | 1297 | |
b16afa45 KH |
1298 | #ifdef BYTE_COMBINING_DEBUG |
1299 | if (count_combining_before (GPT_ADDR, len_byte, from, from_byte) | |
1300 | || count_combining_after (GPT_ADDR, len_byte, from, from_byte)) | |
1301 | abort (); | |
1302 | #endif | |
1303 | ||
828f1ed3 KH |
1304 | if (STRINGP (prev_text)) |
1305 | { | |
d5db4077 KR |
1306 | nchars_del = SCHARS (prev_text); |
1307 | nbytes_del = SBYTES (prev_text); | |
828f1ed3 KH |
1308 | } |
1309 | ||
61415a25 KH |
1310 | /* Update various buffer positions for the new text. */ |
1311 | GAP_SIZE -= len_byte; | |
1312 | ZV += len; Z+= len; | |
1313 | ZV_BYTE += len_byte; Z_BYTE += len_byte; | |
1314 | GPT += len; GPT_BYTE += len_byte; | |
1315 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ | |
1316 | ||
adee4f91 KH |
1317 | if (nchars_del > 0) |
1318 | adjust_markers_for_replace (from, from_byte, nchars_del, nbytes_del, | |
1319 | len, len_byte); | |
1320 | else | |
1321 | adjust_markers_for_insert (from, from_byte, | |
1322 | from + len, from_byte + len_byte, 0); | |
b16afa45 | 1323 | |
828f1ed3 KH |
1324 | if (! EQ (current_buffer->undo_list, Qt)) |
1325 | { | |
828f1ed3 | 1326 | if (nchars_del > 0) |
b16afa45 KH |
1327 | record_delete (from, prev_text); |
1328 | record_insert (from, len); | |
828f1ed3 | 1329 | } |
652838b5 KH |
1330 | |
1331 | if (len > nchars_del) | |
1332 | adjust_overlays_for_insert (from, len - nchars_del); | |
1333 | else if (len < nchars_del) | |
1334 | adjust_overlays_for_delete (from, nchars_del - len); | |
61415a25 | 1335 | if (BUF_INTERVALS (current_buffer) != 0) |
4a7cf15f KH |
1336 | { |
1337 | offset_intervals (current_buffer, from, len - nchars_del); | |
4a7cf15f | 1338 | } |
61415a25 | 1339 | |
b16afa45 KH |
1340 | if (from < PT) |
1341 | adjust_point (len - nchars_del, len_byte - nbytes_del); | |
61415a25 | 1342 | |
9f3ede3c | 1343 | /* As byte combining will decrease Z, we must check this again. */ |
a50df55b GM |
1344 | if (Z - GPT < END_UNCHANGED) |
1345 | END_UNCHANGED = Z - GPT; | |
9f3ede3c | 1346 | |
60ea6052 RS |
1347 | CHECK_MARKERS (); |
1348 | ||
1e9c7b7d | 1349 | if (len == 0) |
b58e3ca1 RS |
1350 | evaporate_overlays (from); |
1351 | MODIFF++; | |
3e145152 | 1352 | CHARS_MODIFF = MODIFF; |
b58e3ca1 RS |
1353 | } |
1354 | ||
1355 | /* Like adjust_after_replace, but doesn't require PREV_TEXT. | |
1356 | This is for use when undo is not enabled in the current buffer. */ | |
1357 | ||
1358 | void | |
ae19ba7c SM |
1359 | adjust_after_replace_noundo (EMACS_INT from, EMACS_INT from_byte, |
1360 | EMACS_INT nchars_del, EMACS_INT nbytes_del, | |
1361 | EMACS_INT len, EMACS_INT len_byte) | |
b58e3ca1 RS |
1362 | { |
1363 | #ifdef BYTE_COMBINING_DEBUG | |
1364 | if (count_combining_before (GPT_ADDR, len_byte, from, from_byte) | |
1365 | || count_combining_after (GPT_ADDR, len_byte, from, from_byte)) | |
1366 | abort (); | |
1367 | #endif | |
1368 | ||
1369 | /* Update various buffer positions for the new text. */ | |
1370 | GAP_SIZE -= len_byte; | |
1371 | ZV += len; Z+= len; | |
1372 | ZV_BYTE += len_byte; Z_BYTE += len_byte; | |
1373 | GPT += len; GPT_BYTE += len_byte; | |
1374 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ | |
1375 | ||
1376 | if (nchars_del > 0) | |
1377 | adjust_markers_for_replace (from, from_byte, nchars_del, nbytes_del, | |
1378 | len, len_byte); | |
1379 | else | |
1380 | adjust_markers_for_insert (from, from_byte, | |
1381 | from + len, from_byte + len_byte, 0); | |
1382 | ||
1383 | if (len > nchars_del) | |
1384 | adjust_overlays_for_insert (from, len - nchars_del); | |
1385 | else if (len < nchars_del) | |
1386 | adjust_overlays_for_delete (from, nchars_del - len); | |
1387 | if (BUF_INTERVALS (current_buffer) != 0) | |
1388 | { | |
1389 | offset_intervals (current_buffer, from, len - nchars_del); | |
1390 | } | |
1391 | ||
1392 | if (from < PT) | |
1393 | adjust_point (len - nchars_del, len_byte - nbytes_del); | |
1394 | ||
1395 | /* As byte combining will decrease Z, we must check this again. */ | |
1396 | if (Z - GPT < END_UNCHANGED) | |
1397 | END_UNCHANGED = Z - GPT; | |
1398 | ||
1399 | CHECK_MARKERS (); | |
1400 | ||
1401 | if (len == 0) | |
1e9c7b7d KH |
1402 | evaporate_overlays (from); |
1403 | MODIFF++; | |
3e145152 | 1404 | CHARS_MODIFF = MODIFF; |
1e9c7b7d KH |
1405 | } |
1406 | ||
652838b5 KH |
1407 | /* Record undo information, adjust markers and position keepers for an |
1408 | insertion of a text from FROM (FROM_BYTE) to TO (TO_BYTE). The | |
1409 | text already exists in the current buffer but character length (TO | |
1410 | - FROM) may be incorrect, the correct length is NEWLEN. */ | |
1411 | ||
1412 | void | |
ae19ba7c SM |
1413 | adjust_after_insert (EMACS_INT from, EMACS_INT from_byte, |
1414 | EMACS_INT to, EMACS_INT to_byte, EMACS_INT newlen) | |
652838b5 | 1415 | { |
ae19ba7c | 1416 | EMACS_INT len = to - from, len_byte = to_byte - from_byte; |
652838b5 KH |
1417 | |
1418 | if (GPT != to) | |
1419 | move_gap_both (to, to_byte); | |
1420 | GAP_SIZE += len_byte; | |
1421 | GPT -= len; GPT_BYTE -= len_byte; | |
1422 | ZV -= len; ZV_BYTE -= len_byte; | |
1423 | Z -= len; Z_BYTE -= len_byte; | |
1424 | adjust_after_replace (from, from_byte, Qnil, newlen, len_byte); | |
1425 | } | |
085db7de | 1426 | \f |
3be11131 | 1427 | /* Replace the text from character positions FROM to TO with NEW, |
c5ca4d3a RS |
1428 | If PREPARE is nonzero, call prepare_to_modify_buffer. |
1429 | If INHERIT, the newly inserted text should inherit text properties | |
1430 | from the surrounding non-deleted text. */ | |
1431 | ||
1432 | /* Note that this does not yet handle markers quite right. | |
1433 | Also it needs to record a single undo-entry that does a replacement | |
1434 | rather than a separate delete and insert. | |
60aa777a RS |
1435 | That way, undo will also handle markers properly. |
1436 | ||
1437 | But if MARKERS is 0, don't relocate markers. */ | |
c5ca4d3a RS |
1438 | |
1439 | void | |
ae19ba7c SM |
1440 | replace_range (EMACS_INT from, EMACS_INT to, Lisp_Object new, |
1441 | int prepare, int inherit, int markers) | |
c5ca4d3a | 1442 | { |
ae19ba7c SM |
1443 | EMACS_INT inschars = SCHARS (new); |
1444 | EMACS_INT insbytes = SBYTES (new); | |
1445 | EMACS_INT from_byte, to_byte; | |
1446 | EMACS_INT nbytes_del, nchars_del; | |
c5ca4d3a RS |
1447 | register Lisp_Object temp; |
1448 | struct gcpro gcpro1; | |
ce97a2d7 | 1449 | INTERVAL intervals; |
ae19ba7c | 1450 | EMACS_INT outgoing_insbytes = insbytes; |
23b20a70 | 1451 | Lisp_Object deletion; |
c5ca4d3a | 1452 | |
60ea6052 RS |
1453 | CHECK_MARKERS (); |
1454 | ||
c5ca4d3a | 1455 | GCPRO1 (new); |
6bbd7a29 | 1456 | deletion = Qnil; |
c5ca4d3a RS |
1457 | |
1458 | if (prepare) | |
1459 | { | |
ae19ba7c | 1460 | EMACS_INT range_length = to - from; |
c5ca4d3a RS |
1461 | prepare_to_modify_buffer (from, to, &from); |
1462 | to = from + range_length; | |
1463 | } | |
1464 | ||
3be11131 RS |
1465 | UNGCPRO; |
1466 | ||
c5ca4d3a RS |
1467 | /* Make args be valid */ |
1468 | if (from < BEGV) | |
1469 | from = BEGV; | |
1470 | if (to > ZV) | |
1471 | to = ZV; | |
1472 | ||
3be11131 RS |
1473 | from_byte = CHAR_TO_BYTE (from); |
1474 | to_byte = CHAR_TO_BYTE (to); | |
c5ca4d3a | 1475 | |
3be11131 RS |
1476 | nchars_del = to - from; |
1477 | nbytes_del = to_byte - from_byte; | |
1478 | ||
1479 | if (nbytes_del <= 0 && insbytes == 0) | |
1480 | return; | |
c5ca4d3a | 1481 | |
1f90a790 RS |
1482 | /* Make OUTGOING_INSBYTES describe the text |
1483 | as it will be inserted in this buffer. */ | |
1484 | ||
1485 | if (NILP (current_buffer->enable_multibyte_characters)) | |
1486 | outgoing_insbytes = inschars; | |
2a1d8be0 | 1487 | else if (! STRING_MULTIBYTE (new)) |
1f90a790 | 1488 | outgoing_insbytes |
d5db4077 | 1489 | = count_size_as_multibyte (SDATA (new), insbytes); |
1f90a790 | 1490 | |
c5ca4d3a | 1491 | /* Make sure point-max won't overflow after this insertion. */ |
3be11131 RS |
1492 | XSETINT (temp, Z_BYTE - nbytes_del + insbytes); |
1493 | if (Z_BYTE - nbytes_del + insbytes != XINT (temp)) | |
1494 | error ("Maximum buffer size exceeded"); | |
c5ca4d3a | 1495 | |
c5ca4d3a RS |
1496 | GCPRO1 (new); |
1497 | ||
1498 | /* Make sure the gap is somewhere in or next to what we are deleting. */ | |
1499 | if (from > GPT) | |
3be11131 | 1500 | gap_right (from, from_byte); |
c5ca4d3a | 1501 | if (to < GPT) |
3be11131 | 1502 | gap_left (to, to_byte, 0); |
c5ca4d3a | 1503 | |
039af53a KH |
1504 | /* Even if we don't record for undo, we must keep the original text |
1505 | because we may have to recover it because of inappropriate byte | |
1506 | combining. */ | |
b16afa45 KH |
1507 | if (! EQ (current_buffer->undo_list, Qt)) |
1508 | deletion = make_buffer_string_both (from, from_byte, to, to_byte, 1); | |
c5ca4d3a | 1509 | |
3be11131 RS |
1510 | GAP_SIZE += nbytes_del; |
1511 | ZV -= nchars_del; | |
1512 | Z -= nchars_del; | |
1513 | ZV_BYTE -= nbytes_del; | |
1514 | Z_BYTE -= nbytes_del; | |
c5ca4d3a | 1515 | GPT = from; |
3be11131 | 1516 | GPT_BYTE = from_byte; |
017e09ac | 1517 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
c5ca4d3a | 1518 | |
3be11131 RS |
1519 | if (GPT_BYTE < GPT) |
1520 | abort (); | |
1521 | ||
a50df55b GM |
1522 | if (GPT - BEG < BEG_UNCHANGED) |
1523 | BEG_UNCHANGED = GPT - BEG; | |
1524 | if (Z - GPT < END_UNCHANGED) | |
1525 | END_UNCHANGED = Z - GPT; | |
c5ca4d3a | 1526 | |
3be11131 RS |
1527 | if (GAP_SIZE < insbytes) |
1528 | make_gap (insbytes - GAP_SIZE); | |
c5ca4d3a | 1529 | |
1f90a790 RS |
1530 | /* Copy the string text into the buffer, perhaps converting |
1531 | between single-byte and multibyte. */ | |
d5db4077 | 1532 | copy_text (SDATA (new), GPT_ADDR, insbytes, |
2a1d8be0 | 1533 | STRING_MULTIBYTE (new), |
1f90a790 RS |
1534 | ! NILP (current_buffer->enable_multibyte_characters)); |
1535 | ||
b16afa45 | 1536 | #ifdef BYTE_COMBINING_DEBUG |
255c7dae RS |
1537 | /* We have copied text into the gap, but we have not marked |
1538 | it as part of the buffer. So we can use the old FROM and FROM_BYTE | |
1539 | here, for both the previous text and the following text. | |
1540 | Meanwhile, GPT_ADDR does point to | |
432f78d2 | 1541 | the text that has been stored by copy_text. */ |
b16afa45 KH |
1542 | if (count_combining_before (GPT_ADDR, outgoing_insbytes, from, from_byte) |
1543 | || count_combining_after (GPT_ADDR, outgoing_insbytes, from, from_byte)) | |
1544 | abort (); | |
1545 | #endif | |
432f78d2 | 1546 | |
23b20a70 KH |
1547 | if (! EQ (current_buffer->undo_list, Qt)) |
1548 | { | |
bec1aca2 RS |
1549 | /* Record the insertion first, so that when we undo, |
1550 | the deletion will be undone first. Thus, undo | |
1551 | will insert before deleting, and thus will keep | |
1552 | the markers before and after this text separate. */ | |
1553 | record_insert (from + SCHARS (deletion), inschars); | |
b16afa45 | 1554 | record_delete (from, deletion); |
23b20a70 | 1555 | } |
c5ca4d3a | 1556 | |
1f90a790 RS |
1557 | GAP_SIZE -= outgoing_insbytes; |
1558 | GPT += inschars; | |
1559 | ZV += inschars; | |
1560 | Z += inschars; | |
1561 | GPT_BYTE += outgoing_insbytes; | |
1562 | ZV_BYTE += outgoing_insbytes; | |
1563 | Z_BYTE += outgoing_insbytes; | |
c5ca4d3a RS |
1564 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
1565 | ||
3be11131 RS |
1566 | if (GPT_BYTE < GPT) |
1567 | abort (); | |
1568 | ||
c5ca4d3a RS |
1569 | /* Adjust the overlay center as needed. This must be done after |
1570 | adjusting the markers that bound the overlays. */ | |
3be11131 | 1571 | adjust_overlays_for_delete (from, nchars_del); |
1f90a790 | 1572 | adjust_overlays_for_insert (from, inschars); |
048a0fbb RS |
1573 | |
1574 | /* Adjust markers for the deletion and the insertion. */ | |
60aa777a | 1575 | if (markers) |
048a0fbb RS |
1576 | adjust_markers_for_replace (from, from_byte, nchars_del, nbytes_del, |
1577 | inschars, outgoing_insbytes); | |
c5ca4d3a | 1578 | |
255c7dae | 1579 | offset_intervals (current_buffer, from, inschars - nchars_del); |
ce97a2d7 RS |
1580 | |
1581 | /* Get the intervals for the part of the string we are inserting-- | |
1582 | not including the combined-before bytes. */ | |
d5db4077 | 1583 | intervals = STRING_INTERVALS (new); |
ce97a2d7 | 1584 | /* Insert those intervals. */ |
1f90a790 | 1585 | graft_intervals_into_buffer (intervals, from, inschars, |
ce97a2d7 | 1586 | current_buffer, inherit); |
c5ca4d3a | 1587 | |
1f90a790 RS |
1588 | /* Relocate point as if it were a marker. */ |
1589 | if (from < PT) | |
8bedbe9d | 1590 | adjust_point ((from + inschars - (PT < to ? PT : to)), |
1f90a790 | 1591 | (from_byte + outgoing_insbytes |
8bedbe9d | 1592 | - (PT_BYTE < to_byte ? PT_BYTE : to_byte))); |
c5ca4d3a | 1593 | |
1f90a790 RS |
1594 | if (outgoing_insbytes == 0) |
1595 | evaporate_overlays (from); | |
93b882e8 | 1596 | |
60ea6052 RS |
1597 | CHECK_MARKERS (); |
1598 | ||
c5ca4d3a | 1599 | MODIFF++; |
3e145152 | 1600 | CHARS_MODIFF = MODIFF; |
c5ca4d3a RS |
1601 | UNGCPRO; |
1602 | ||
255c7dae | 1603 | signal_after_change (from, nchars_del, GPT - from); |
0ef71121 | 1604 | update_compositions (from, GPT, CHECK_BORDER); |
c5ca4d3a RS |
1605 | } |
1606 | \f | |
085db7de RS |
1607 | /* Replace the text from character positions FROM to TO with |
1608 | the text in INS of length INSCHARS. | |
1609 | Keep the text properties that applied to the old characters | |
1610 | (extending them to all the new chars if there are more new chars). | |
1611 | ||
1612 | Note that this does not yet handle markers quite right. | |
1613 | ||
1614 | If MARKERS is nonzero, relocate markers. | |
1615 | ||
1616 | Unlike most functions at this level, never call | |
1617 | prepare_to_modify_buffer and never call signal_after_change. */ | |
1618 | ||
1619 | void | |
ae19ba7c SM |
1620 | replace_range_2 (EMACS_INT from, EMACS_INT from_byte, |
1621 | EMACS_INT to, EMACS_INT to_byte, | |
a8fe7202 | 1622 | const char *ins, EMACS_INT inschars, EMACS_INT insbytes, |
ae19ba7c | 1623 | int markers) |
085db7de | 1624 | { |
ae19ba7c | 1625 | EMACS_INT nbytes_del, nchars_del; |
085db7de RS |
1626 | Lisp_Object temp; |
1627 | ||
1628 | CHECK_MARKERS (); | |
1629 | ||
1630 | nchars_del = to - from; | |
1631 | nbytes_del = to_byte - from_byte; | |
1632 | ||
1633 | if (nbytes_del <= 0 && insbytes == 0) | |
1634 | return; | |
1635 | ||
1636 | /* Make sure point-max won't overflow after this insertion. */ | |
1637 | XSETINT (temp, Z_BYTE - nbytes_del + insbytes); | |
1638 | if (Z_BYTE - nbytes_del + insbytes != XINT (temp)) | |
1639 | error ("Maximum buffer size exceeded"); | |
1640 | ||
1641 | /* Make sure the gap is somewhere in or next to what we are deleting. */ | |
1642 | if (from > GPT) | |
1643 | gap_right (from, from_byte); | |
1644 | if (to < GPT) | |
1645 | gap_left (to, to_byte, 0); | |
1646 | ||
1647 | GAP_SIZE += nbytes_del; | |
1648 | ZV -= nchars_del; | |
1649 | Z -= nchars_del; | |
1650 | ZV_BYTE -= nbytes_del; | |
1651 | Z_BYTE -= nbytes_del; | |
1652 | GPT = from; | |
1653 | GPT_BYTE = from_byte; | |
1654 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ | |
1655 | ||
1656 | if (GPT_BYTE < GPT) | |
1657 | abort (); | |
1658 | ||
1659 | if (GPT - BEG < BEG_UNCHANGED) | |
1660 | BEG_UNCHANGED = GPT - BEG; | |
1661 | if (Z - GPT < END_UNCHANGED) | |
1662 | END_UNCHANGED = Z - GPT; | |
1663 | ||
1664 | if (GAP_SIZE < insbytes) | |
1665 | make_gap (insbytes - GAP_SIZE); | |
1666 | ||
1667 | /* Copy the replacement text into the buffer. */ | |
72af86bd | 1668 | memcpy (GPT_ADDR, ins, insbytes); |
085db7de RS |
1669 | |
1670 | #ifdef BYTE_COMBINING_DEBUG | |
1671 | /* We have copied text into the gap, but we have not marked | |
1672 | it as part of the buffer. So we can use the old FROM and FROM_BYTE | |
1673 | here, for both the previous text and the following text. | |
1674 | Meanwhile, GPT_ADDR does point to | |
1675 | the text that has been stored by copy_text. */ | |
1676 | if (count_combining_before (GPT_ADDR, insbytes, from, from_byte) | |
1677 | || count_combining_after (GPT_ADDR, insbytes, from, from_byte)) | |
1678 | abort (); | |
1679 | #endif | |
1680 | ||
1681 | GAP_SIZE -= insbytes; | |
1682 | GPT += inschars; | |
1683 | ZV += inschars; | |
1684 | Z += inschars; | |
1685 | GPT_BYTE += insbytes; | |
1686 | ZV_BYTE += insbytes; | |
1687 | Z_BYTE += insbytes; | |
1688 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ | |
1689 | ||
1690 | if (GPT_BYTE < GPT) | |
1691 | abort (); | |
1692 | ||
1693 | /* Adjust the overlay center as needed. This must be done after | |
1694 | adjusting the markers that bound the overlays. */ | |
1695 | if (nchars_del != inschars) | |
1696 | { | |
1697 | adjust_overlays_for_insert (from, inschars); | |
1698 | adjust_overlays_for_delete (from + inschars, nchars_del); | |
1699 | } | |
1700 | ||
1701 | /* Adjust markers for the deletion and the insertion. */ | |
1702 | if (markers | |
7077904e | 1703 | && ! (nchars_del == 1 && inschars == 1 && nbytes_del == insbytes)) |
085db7de RS |
1704 | adjust_markers_for_replace (from, from_byte, nchars_del, nbytes_del, |
1705 | inschars, insbytes); | |
1706 | ||
1707 | offset_intervals (current_buffer, from, inschars - nchars_del); | |
1708 | ||
1709 | /* Relocate point as if it were a marker. */ | |
7077904e KH |
1710 | if (from < PT && (nchars_del != inschars || nbytes_del != insbytes)) |
1711 | { | |
1712 | if (PT < to) | |
1713 | /* PT was within the deleted text. Move it to FROM. */ | |
1714 | adjust_point (from - PT, from_byte - PT_BYTE); | |
1715 | else | |
1716 | adjust_point (inschars - nchars_del, insbytes - nbytes_del); | |
1717 | } | |
085db7de RS |
1718 | |
1719 | if (insbytes == 0) | |
1720 | evaporate_overlays (from); | |
1721 | ||
1722 | CHECK_MARKERS (); | |
1723 | ||
1724 | MODIFF++; | |
3e145152 | 1725 | CHARS_MODIFF = MODIFF; |
085db7de RS |
1726 | } |
1727 | \f | |
b45433b3 | 1728 | /* Delete characters in current buffer |
3be11131 RS |
1729 | from FROM up to (but not including) TO. |
1730 | If TO comes before FROM, we delete nothing. */ | |
b45433b3 | 1731 | |
c660b094 | 1732 | void |
ae19ba7c | 1733 | del_range (EMACS_INT from, EMACS_INT to) |
47c64747 | 1734 | { |
7dae4502 | 1735 | del_range_1 (from, to, 1, 0); |
47c64747 RS |
1736 | } |
1737 | ||
7dae4502 SM |
1738 | /* Like del_range; PREPARE says whether to call prepare_to_modify_buffer. |
1739 | RET_STRING says to return the deleted text. */ | |
47c64747 | 1740 | |
7dae4502 | 1741 | Lisp_Object |
ae19ba7c | 1742 | del_range_1 (EMACS_INT from, EMACS_INT to, int prepare, int ret_string) |
b45433b3 | 1743 | { |
ae19ba7c | 1744 | EMACS_INT from_byte, to_byte; |
7dae4502 SM |
1745 | Lisp_Object deletion; |
1746 | struct gcpro gcpro1; | |
3be11131 RS |
1747 | |
1748 | /* Make args be valid */ | |
1749 | if (from < BEGV) | |
1750 | from = BEGV; | |
1751 | if (to > ZV) | |
1752 | to = ZV; | |
1753 | ||
1754 | if (to <= from) | |
7dae4502 | 1755 | return Qnil; |
3be11131 RS |
1756 | |
1757 | if (prepare) | |
1758 | { | |
ae19ba7c | 1759 | EMACS_INT range_length = to - from; |
3be11131 | 1760 | prepare_to_modify_buffer (from, to, &from); |
0a411995 | 1761 | to = min (ZV, from + range_length); |
3be11131 RS |
1762 | } |
1763 | ||
1764 | from_byte = CHAR_TO_BYTE (from); | |
1765 | to_byte = CHAR_TO_BYTE (to); | |
1766 | ||
7dae4502 SM |
1767 | deletion = del_range_2 (from, from_byte, to, to_byte, ret_string); |
1768 | GCPRO1(deletion); | |
9c36993a | 1769 | signal_after_change (from, to - from, 0); |
233cc02d | 1770 | update_compositions (from, from, CHECK_HEAD); |
7dae4502 SM |
1771 | UNGCPRO; |
1772 | return deletion; | |
3be11131 RS |
1773 | } |
1774 | ||
1775 | /* Like del_range_1 but args are byte positions, not char positions. */ | |
1776 | ||
1777 | void | |
ae19ba7c | 1778 | del_range_byte (EMACS_INT from_byte, EMACS_INT to_byte, int prepare) |
3be11131 | 1779 | { |
ae19ba7c | 1780 | EMACS_INT from, to; |
3be11131 RS |
1781 | |
1782 | /* Make args be valid */ | |
1783 | if (from_byte < BEGV_BYTE) | |
1784 | from_byte = BEGV_BYTE; | |
1785 | if (to_byte > ZV_BYTE) | |
1786 | to_byte = ZV_BYTE; | |
1787 | ||
1788 | if (to_byte <= from_byte) | |
1789 | return; | |
1790 | ||
1791 | from = BYTE_TO_CHAR (from_byte); | |
1792 | to = BYTE_TO_CHAR (to_byte); | |
b45433b3 | 1793 | |
d206af14 RS |
1794 | if (prepare) |
1795 | { | |
ae19ba7c SM |
1796 | EMACS_INT old_from = from, old_to = Z - to; |
1797 | EMACS_INT range_length = to - from; | |
d206af14 RS |
1798 | prepare_to_modify_buffer (from, to, &from); |
1799 | to = from + range_length; | |
3be11131 RS |
1800 | |
1801 | if (old_from != from) | |
1802 | from_byte = CHAR_TO_BYTE (from); | |
0a411995 GM |
1803 | if (to > ZV) |
1804 | { | |
1805 | to = ZV; | |
1806 | to_byte = ZV_BYTE; | |
1807 | } | |
1808 | else if (old_to == Z - to) | |
3be11131 | 1809 | to_byte = CHAR_TO_BYTE (to); |
d206af14 RS |
1810 | } |
1811 | ||
7dae4502 | 1812 | del_range_2 (from, from_byte, to, to_byte, 0); |
9c36993a | 1813 | signal_after_change (from, to - from, 0); |
0ef71121 | 1814 | update_compositions (from, from, CHECK_HEAD); |
3be11131 RS |
1815 | } |
1816 | ||
1817 | /* Like del_range_1, but positions are specified both as charpos | |
1818 | and bytepos. */ | |
1819 | ||
1820 | void | |
ae19ba7c SM |
1821 | del_range_both (EMACS_INT from, EMACS_INT from_byte, |
1822 | EMACS_INT to, EMACS_INT to_byte, int prepare) | |
3be11131 | 1823 | { |
b45433b3 | 1824 | /* Make args be valid */ |
3be11131 RS |
1825 | if (from_byte < BEGV_BYTE) |
1826 | from_byte = BEGV_BYTE; | |
1827 | if (to_byte > ZV_BYTE) | |
1828 | to_byte = ZV_BYTE; | |
1829 | ||
1830 | if (to_byte <= from_byte) | |
1831 | return; | |
1832 | ||
b45433b3 JB |
1833 | if (from < BEGV) |
1834 | from = BEGV; | |
1835 | if (to > ZV) | |
1836 | to = ZV; | |
1837 | ||
3be11131 RS |
1838 | if (prepare) |
1839 | { | |
ae19ba7c SM |
1840 | EMACS_INT old_from = from, old_to = Z - to; |
1841 | EMACS_INT range_length = to - from; | |
3be11131 RS |
1842 | prepare_to_modify_buffer (from, to, &from); |
1843 | to = from + range_length; | |
1844 | ||
1845 | if (old_from != from) | |
1846 | from_byte = CHAR_TO_BYTE (from); | |
0a411995 GM |
1847 | if (to > ZV) |
1848 | { | |
1849 | to = ZV; | |
1850 | to_byte = ZV_BYTE; | |
1851 | } | |
1852 | else if (old_to == Z - to) | |
3be11131 RS |
1853 | to_byte = CHAR_TO_BYTE (to); |
1854 | } | |
1855 | ||
7dae4502 | 1856 | del_range_2 (from, from_byte, to, to_byte, 0); |
9c36993a | 1857 | signal_after_change (from, to - from, 0); |
0ef71121 | 1858 | update_compositions (from, from, CHECK_HEAD); |
3be11131 RS |
1859 | } |
1860 | ||
1861 | /* Delete a range of text, specified both as character positions | |
1862 | and byte positions. FROM and TO are character positions, | |
7dae4502 SM |
1863 | while FROM_BYTE and TO_BYTE are byte positions. |
1864 | If RET_STRING is true, the deleted area is returned as a string. */ | |
3be11131 | 1865 | |
7dae4502 | 1866 | Lisp_Object |
ae19ba7c SM |
1867 | del_range_2 (EMACS_INT from, EMACS_INT from_byte, |
1868 | EMACS_INT to, EMACS_INT to_byte, int ret_string) | |
3be11131 | 1869 | { |
ae19ba7c | 1870 | register EMACS_INT nbytes_del, nchars_del; |
628cea90 | 1871 | Lisp_Object deletion; |
3be11131 | 1872 | |
60ea6052 RS |
1873 | CHECK_MARKERS (); |
1874 | ||
3be11131 RS |
1875 | nchars_del = to - from; |
1876 | nbytes_del = to_byte - from_byte; | |
b45433b3 JB |
1877 | |
1878 | /* Make sure the gap is somewhere in or next to what we are deleting. */ | |
1879 | if (from > GPT) | |
3be11131 | 1880 | gap_right (from, from_byte); |
b45433b3 | 1881 | if (to < GPT) |
3be11131 | 1882 | gap_left (to, to_byte, 0); |
b45433b3 | 1883 | |
b16afa45 KH |
1884 | #ifdef BYTE_COMBINING_DEBUG |
1885 | if (count_combining_before (BUF_BYTE_ADDRESS (current_buffer, to_byte), | |
1886 | Z_BYTE - to_byte, from, from_byte)) | |
1887 | abort (); | |
1888 | #endif | |
628cea90 | 1889 | |
7dae4502 | 1890 | if (ret_string || ! EQ (current_buffer->undo_list, Qt)) |
b16afa45 | 1891 | deletion = make_buffer_string_both (from, from_byte, to, to_byte, 1); |
7dae4502 SM |
1892 | else |
1893 | deletion = Qnil; | |
1894 | ||
8948d317 RS |
1895 | /* Relocate all markers pointing into the new, larger gap |
1896 | to point at the end of the text before the gap. | |
3be11131 RS |
1897 | Do this before recording the deletion, |
1898 | so that undo handles this after reinserting the text. */ | |
1899 | adjust_markers_for_delete (from, from_byte, to, to_byte); | |
b16afa45 | 1900 | |
0aa8c4b2 | 1901 | if (! EQ (current_buffer->undo_list, Qt)) |
b16afa45 | 1902 | record_delete (from, deletion); |
be09561e | 1903 | MODIFF++; |
3e145152 | 1904 | CHARS_MODIFF = MODIFF; |
be09561e | 1905 | |
b45433b3 | 1906 | /* Relocate point as if it were a marker. */ |
2bcaed71 | 1907 | if (from < PT) |
3be11131 RS |
1908 | adjust_point (from - (PT < to ? PT : to), |
1909 | from_byte - (PT_BYTE < to_byte ? PT_BYTE : to_byte)); | |
b45433b3 | 1910 | |
3be11131 | 1911 | offset_intervals (current_buffer, from, - nchars_del); |
16032db6 | 1912 | |
adde4858 | 1913 | /* Adjust the overlay center as needed. This must be done after |
a7f38d28 | 1914 | adjusting the markers that bound the overlays. */ |
e3a87305 | 1915 | adjust_overlays_for_delete (from, nchars_del); |
adde4858 | 1916 | |
3be11131 RS |
1917 | GAP_SIZE += nbytes_del; |
1918 | ZV_BYTE -= nbytes_del; | |
1919 | Z_BYTE -= nbytes_del; | |
1920 | ZV -= nchars_del; | |
1921 | Z -= nchars_del; | |
b45433b3 | 1922 | GPT = from; |
3be11131 | 1923 | GPT_BYTE = from_byte; |
b3b58c01 AS |
1924 | if (GAP_SIZE > 0 && !current_buffer->text->inhibit_shrinking) |
1925 | /* Put an anchor, unless called from decode_coding_object which | |
1926 | needs to access the previous gap contents. */ | |
1927 | *(GPT_ADDR) = 0; | |
e3a87305 | 1928 | |
3be11131 RS |
1929 | if (GPT_BYTE < GPT) |
1930 | abort (); | |
1931 | ||
a50df55b GM |
1932 | if (GPT - BEG < BEG_UNCHANGED) |
1933 | BEG_UNCHANGED = GPT - BEG; | |
1934 | if (Z - GPT < END_UNCHANGED) | |
1935 | END_UNCHANGED = Z - GPT; | |
b45433b3 | 1936 | |
60ea6052 RS |
1937 | CHECK_MARKERS (); |
1938 | ||
d386034e | 1939 | evaporate_overlays (from); |
7dae4502 SM |
1940 | |
1941 | return deletion; | |
b45433b3 JB |
1942 | } |
1943 | \f | |
3be11131 RS |
1944 | /* Call this if you're about to change the region of BUFFER from |
1945 | character positions START to END. This checks the read-only | |
1946 | properties of the region, calls the necessary modification hooks, | |
1947 | and warns the next redisplay that it should pay attention to that | |
3e145152 CY |
1948 | area. |
1949 | ||
1950 | If PRESERVE_CHARS_MODIFF is non-zero, do not update CHARS_MODIFF. | |
1951 | Otherwise set CHARS_MODIFF to the new value of MODIFF. */ | |
3be11131 | 1952 | |
c660b094 | 1953 | void |
ae19ba7c SM |
1954 | modify_region (struct buffer *buffer, EMACS_INT start, EMACS_INT end, |
1955 | int preserve_chars_modiff) | |
b45433b3 | 1956 | { |
04a759c8 JB |
1957 | struct buffer *old_buffer = current_buffer; |
1958 | ||
1959 | if (buffer != old_buffer) | |
1960 | set_buffer_internal (buffer); | |
1961 | ||
d206af14 | 1962 | prepare_to_modify_buffer (start, end, NULL); |
b45433b3 | 1963 | |
a50df55b | 1964 | BUF_COMPUTE_UNCHANGED (buffer, start - 1, end); |
83010cd6 | 1965 | |
9fbf87cd | 1966 | if (MODIFF <= SAVE_MODIFF) |
83010cd6 | 1967 | record_first_change (); |
b45433b3 | 1968 | MODIFF++; |
3e145152 CY |
1969 | if (! preserve_chars_modiff) |
1970 | CHARS_MODIFF = MODIFF; | |
04a759c8 | 1971 | |
069cdc4f RS |
1972 | buffer->point_before_scroll = Qnil; |
1973 | ||
04a759c8 JB |
1974 | if (buffer != old_buffer) |
1975 | set_buffer_internal (old_buffer); | |
b45433b3 | 1976 | } |
d206af14 | 1977 | \f |
3be11131 RS |
1978 | /* Check that it is okay to modify the buffer between START and END, |
1979 | which are char positions. | |
1980 | ||
679194a6 JA |
1981 | Run the before-change-function, if any. If intervals are in use, |
1982 | verify that the text to be modified is not read-only, and call | |
d206af14 RS |
1983 | any modification properties the text may have. |
1984 | ||
1985 | If PRESERVE_PTR is nonzero, we relocate *PRESERVE_PTR | |
1986 | by holding its value temporarily in a marker. */ | |
b45433b3 | 1987 | |
c660b094 | 1988 | void |
9628fed7 SM |
1989 | prepare_to_modify_buffer (EMACS_INT start, EMACS_INT end, |
1990 | EMACS_INT *preserve_ptr) | |
b45433b3 | 1991 | { |
234fb773 CY |
1992 | struct buffer *base_buffer; |
1993 | ||
d427b66a | 1994 | if (!NILP (current_buffer->read_only)) |
b45433b3 JB |
1995 | Fbarf_if_buffer_read_only (); |
1996 | ||
2e9f55fd GM |
1997 | /* Let redisplay consider other windows than selected_window |
1998 | if modifying another buffer. */ | |
1999 | if (XBUFFER (XWINDOW (selected_window)->buffer) != current_buffer) | |
2000 | ++windows_or_buffers_changed; | |
2001 | ||
9fbf87cd | 2002 | if (BUF_INTERVALS (current_buffer) != 0) |
d206af14 RS |
2003 | { |
2004 | if (preserve_ptr) | |
2005 | { | |
2006 | Lisp_Object preserve_marker; | |
2007 | struct gcpro gcpro1; | |
2008 | preserve_marker = Fcopy_marker (make_number (*preserve_ptr), Qnil); | |
2009 | GCPRO1 (preserve_marker); | |
2010 | verify_interval_modification (current_buffer, start, end); | |
2011 | *preserve_ptr = marker_position (preserve_marker); | |
dab0b04d | 2012 | unchain_marker (XMARKER (preserve_marker)); |
d206af14 RS |
2013 | UNGCPRO; |
2014 | } | |
2015 | else | |
2016 | verify_interval_modification (current_buffer, start, end); | |
2017 | } | |
b45433b3 | 2018 | |
234fb773 CY |
2019 | /* For indirect buffers, use the base buffer to check clashes. */ |
2020 | if (current_buffer->base_buffer != 0) | |
2021 | base_buffer = current_buffer->base_buffer; | |
2022 | else | |
2023 | base_buffer = current_buffer; | |
2024 | ||
b45433b3 | 2025 | #ifdef CLASH_DETECTION |
234fb773 | 2026 | if (!NILP (base_buffer->file_truename) |
ab6c5c0c | 2027 | /* Make binding buffer-file-name to nil effective. */ |
234fb773 | 2028 | && !NILP (base_buffer->filename) |
9fbf87cd | 2029 | && SAVE_MODIFF >= MODIFF) |
234fb773 | 2030 | lock_file (base_buffer->file_truename); |
b45433b3 JB |
2031 | #else |
2032 | /* At least warn if this file has changed on disk since it was visited. */ | |
234fb773 | 2033 | if (!NILP (base_buffer->filename) |
9fbf87cd | 2034 | && SAVE_MODIFF >= MODIFF |
d427b66a | 2035 | && NILP (Fverify_visited_file_modtime (Fcurrent_buffer ())) |
234fb773 | 2036 | && !NILP (Ffile_exists_p (base_buffer->filename))) |
b45433b3 | 2037 | call1 (intern ("ask-user-about-supersession-threat"), |
234fb773 | 2038 | base_buffer->filename); |
b45433b3 JB |
2039 | #endif /* not CLASH_DETECTION */ |
2040 | ||
9852377f | 2041 | /* If `select-active-regions' is non-nil, save the region text. */ |
7c23dd44 | 2042 | if (!NILP (current_buffer->mark_active) |
8b78d5e3 | 2043 | && !inhibit_modification_hooks |
d24ec09a | 2044 | && XMARKER (current_buffer->mark)->buffer |
7c23dd44 CY |
2045 | && NILP (Vsaved_region_selection) |
2046 | && (EQ (Vselect_active_regions, Qonly) | |
2047 | ? EQ (CAR_SAFE (Vtransient_mark_mode), Qonly) | |
2048 | : (!NILP (Vselect_active_regions) | |
2049 | && !NILP (Vtransient_mark_mode)))) | |
9852377f | 2050 | { |
d24ec09a | 2051 | EMACS_INT b = XMARKER (current_buffer->mark)->charpos; |
413d18e7 | 2052 | EMACS_INT e = PT; |
746812d9 CY |
2053 | if (b < e) |
2054 | Vsaved_region_selection = make_buffer_string (b, e, 0); | |
2055 | else if (b > e) | |
2056 | Vsaved_region_selection = make_buffer_string (e, b, 0); | |
9852377f CY |
2057 | } |
2058 | ||
d206af14 | 2059 | signal_before_change (start, end, preserve_ptr); |
2f545eea | 2060 | |
56e1065e JB |
2061 | if (current_buffer->newline_cache) |
2062 | invalidate_region_cache (current_buffer, | |
2063 | current_buffer->newline_cache, | |
2064 | start - BEG, Z - end); | |
2065 | if (current_buffer->width_run_cache) | |
2066 | invalidate_region_cache (current_buffer, | |
2067 | current_buffer->width_run_cache, | |
2068 | start - BEG, Z - end); | |
2069 | ||
2f545eea | 2070 | Vdeactivate_mark = Qt; |
b45433b3 JB |
2071 | } |
2072 | \f | |
d206af14 RS |
2073 | /* These macros work with an argument named `preserve_ptr' |
2074 | and a local variable named `preserve_marker'. */ | |
2075 | ||
2076 | #define PRESERVE_VALUE \ | |
2077 | if (preserve_ptr && NILP (preserve_marker)) \ | |
2078 | preserve_marker = Fcopy_marker (make_number (*preserve_ptr), Qnil) | |
2079 | ||
2080 | #define RESTORE_VALUE \ | |
2081 | if (! NILP (preserve_marker)) \ | |
2082 | { \ | |
2083 | *preserve_ptr = marker_position (preserve_marker); \ | |
dab0b04d | 2084 | unchain_marker (XMARKER (preserve_marker)); \ |
d206af14 RS |
2085 | } |
2086 | ||
b86e0aaf RS |
2087 | #define PRESERVE_START_END \ |
2088 | if (NILP (start_marker)) \ | |
2089 | start_marker = Fcopy_marker (start, Qnil); \ | |
2090 | if (NILP (end_marker)) \ | |
2091 | end_marker = Fcopy_marker (end, Qnil); | |
2092 | ||
2093 | #define FETCH_START \ | |
2094 | (! NILP (start_marker) ? Fmarker_position (start_marker) : start) | |
2095 | ||
2096 | #define FETCH_END \ | |
2097 | (! NILP (end_marker) ? Fmarker_position (end_marker) : end) | |
2098 | ||
4a181359 | 2099 | /* Set a variable to nil if an error occurred. |
e6d3f090 SM |
2100 | Don't change the variable if there was no error. |
2101 | VAL is a cons-cell (VARIABLE . NO-ERROR-FLAG). | |
2102 | VARIABLE is the variable to maybe set to nil. | |
2103 | NO-ERROR-FLAG is nil if there was an error, | |
2104 | anything else meaning no error (so this function does nothing). */ | |
4a181359 | 2105 | Lisp_Object |
971de7fb | 2106 | reset_var_on_error (Lisp_Object val) |
4a181359 SM |
2107 | { |
2108 | if (NILP (XCDR (val))) | |
2109 | Fset (XCAR (val), Qnil); | |
2110 | return Qnil; | |
2111 | } | |
2112 | ||
eb8c3be9 | 2113 | /* Signal a change to the buffer immediately before it happens. |
d206af14 RS |
2114 | START_INT and END_INT are the bounds of the text to be changed. |
2115 | ||
2116 | If PRESERVE_PTR is nonzero, we relocate *PRESERVE_PTR | |
2117 | by holding its value temporarily in a marker. */ | |
b45433b3 | 2118 | |
c660b094 | 2119 | void |
ae19ba7c | 2120 | signal_before_change (EMACS_INT start_int, EMACS_INT end_int, |
9628fed7 | 2121 | EMACS_INT *preserve_ptr) |
b45433b3 | 2122 | { |
fb4ee5cd | 2123 | Lisp_Object start, end; |
b86e0aaf | 2124 | Lisp_Object start_marker, end_marker; |
d206af14 | 2125 | Lisp_Object preserve_marker; |
b86e0aaf | 2126 | struct gcpro gcpro1, gcpro2, gcpro3; |
4a181359 | 2127 | int count = SPECPDL_INDEX (); |
fb4ee5cd | 2128 | |
fd16a4c6 KH |
2129 | if (inhibit_modification_hooks) |
2130 | return; | |
2131 | ||
fb4ee5cd RS |
2132 | start = make_number (start_int); |
2133 | end = make_number (end_int); | |
d206af14 | 2134 | preserve_marker = Qnil; |
b86e0aaf RS |
2135 | start_marker = Qnil; |
2136 | end_marker = Qnil; | |
2137 | GCPRO3 (preserve_marker, start_marker, end_marker); | |
fb4ee5cd | 2138 | |
4a181359 SM |
2139 | specbind (Qinhibit_modification_hooks, Qt); |
2140 | ||
b45433b3 | 2141 | /* If buffer is unmodified, run a special hook for that case. */ |
9fbf87cd | 2142 | if (SAVE_MODIFF >= MODIFF |
dbc4e1c1 JB |
2143 | && !NILP (Vfirst_change_hook) |
2144 | && !NILP (Vrun_hooks)) | |
d206af14 RS |
2145 | { |
2146 | PRESERVE_VALUE; | |
b86e0aaf | 2147 | PRESERVE_START_END; |
d206af14 RS |
2148 | call1 (Vrun_hooks, Qfirst_change_hook); |
2149 | } | |
dbc4e1c1 | 2150 | |
3d1e2d9c | 2151 | /* Now run the before-change-functions if any. */ |
e45fb8bf RS |
2152 | if (!NILP (Vbefore_change_functions)) |
2153 | { | |
3d1e2d9c | 2154 | Lisp_Object args[3]; |
4a181359 | 2155 | Lisp_Object rvoe_arg = Fcons (Qbefore_change_functions, Qnil); |
3d1e2d9c | 2156 | |
d206af14 | 2157 | PRESERVE_VALUE; |
b86e0aaf | 2158 | PRESERVE_START_END; |
d206af14 | 2159 | |
4a181359 SM |
2160 | /* Mark before-change-functions to be reset to nil in case of error. */ |
2161 | record_unwind_protect (reset_var_on_error, rvoe_arg); | |
3d1e2d9c RS |
2162 | |
2163 | /* Actually run the hook functions. */ | |
2164 | args[0] = Qbefore_change_functions; | |
b86e0aaf RS |
2165 | args[1] = FETCH_START; |
2166 | args[2] = FETCH_END; | |
4a181359 | 2167 | Frun_hook_with_args (3, args); |
3d1e2d9c | 2168 | |
4a181359 SM |
2169 | /* There was no error: unarm the reset_on_error. */ |
2170 | XSETCDR (rvoe_arg, Qt); | |
e45fb8bf | 2171 | } |
d07c0804 | 2172 | |
fbebdf81 | 2173 | if (current_buffer->overlays_before || current_buffer->overlays_after) |
d206af14 RS |
2174 | { |
2175 | PRESERVE_VALUE; | |
b86e0aaf RS |
2176 | report_overlay_modification (FETCH_START, FETCH_END, 0, |
2177 | FETCH_START, FETCH_END, Qnil); | |
d206af14 RS |
2178 | } |
2179 | ||
b86e0aaf RS |
2180 | if (! NILP (start_marker)) |
2181 | free_marker (start_marker); | |
2182 | if (! NILP (end_marker)) | |
2183 | free_marker (end_marker); | |
d206af14 RS |
2184 | RESTORE_VALUE; |
2185 | UNGCPRO; | |
4a181359 SM |
2186 | |
2187 | unbind_to (count, Qnil); | |
b45433b3 JB |
2188 | } |
2189 | ||
eb8c3be9 | 2190 | /* Signal a change immediately after it happens. |
3be11131 | 2191 | CHARPOS is the character position of the start of the changed text. |
b45433b3 JB |
2192 | LENDEL is the number of characters of the text before the change. |
2193 | (Not the whole buffer; just the part that was changed.) | |
8b09e5d0 RS |
2194 | LENINS is the number of characters in that part of the text |
2195 | after the change. */ | |
b45433b3 | 2196 | |
c660b094 | 2197 | void |
ae19ba7c | 2198 | signal_after_change (EMACS_INT charpos, EMACS_INT lendel, EMACS_INT lenins) |
b45433b3 | 2199 | { |
4a181359 | 2200 | int count = SPECPDL_INDEX (); |
fd16a4c6 KH |
2201 | if (inhibit_modification_hooks) |
2202 | return; | |
2203 | ||
fb2e7d14 RS |
2204 | /* If we are deferring calls to the after-change functions |
2205 | and there are no before-change functions, | |
2206 | just record the args that we were going to use. */ | |
2207 | if (! NILP (Vcombine_after_change_calls) | |
1675d086 | 2208 | && NILP (Vbefore_change_functions) |
fbebdf81 SM |
2209 | && !current_buffer->overlays_before |
2210 | && !current_buffer->overlays_after) | |
fb2e7d14 RS |
2211 | { |
2212 | Lisp_Object elt; | |
2213 | ||
2214 | if (!NILP (combine_after_change_list) | |
2215 | && current_buffer != XBUFFER (combine_after_change_buffer)) | |
2216 | Fcombine_after_change_execute (); | |
2217 | ||
3be11131 RS |
2218 | elt = Fcons (make_number (charpos - BEG), |
2219 | Fcons (make_number (Z - (charpos - lendel + lenins)), | |
fb2e7d14 RS |
2220 | Fcons (make_number (lenins - lendel), Qnil))); |
2221 | combine_after_change_list | |
2222 | = Fcons (elt, combine_after_change_list); | |
2223 | combine_after_change_buffer = Fcurrent_buffer (); | |
2224 | ||
2225 | return; | |
2226 | } | |
2227 | ||
177c0ea7 | 2228 | if (!NILP (combine_after_change_list)) |
fb2e7d14 RS |
2229 | Fcombine_after_change_execute (); |
2230 | ||
4a181359 SM |
2231 | specbind (Qinhibit_modification_hooks, Qt); |
2232 | ||
e45fb8bf RS |
2233 | if (!NILP (Vafter_change_functions)) |
2234 | { | |
3d1e2d9c | 2235 | Lisp_Object args[4]; |
4a181359 SM |
2236 | Lisp_Object rvoe_arg = Fcons (Qafter_change_functions, Qnil); |
2237 | ||
2238 | /* Mark after-change-functions to be reset to nil in case of error. */ | |
2239 | record_unwind_protect (reset_var_on_error, rvoe_arg); | |
3d1e2d9c RS |
2240 | |
2241 | /* Actually run the hook functions. */ | |
2242 | args[0] = Qafter_change_functions; | |
3be11131 RS |
2243 | XSETFASTINT (args[1], charpos); |
2244 | XSETFASTINT (args[2], charpos + lenins); | |
3d1e2d9c | 2245 | XSETFASTINT (args[3], lendel); |
4a181359 | 2246 | Frun_hook_with_args (4, args); |
3d1e2d9c | 2247 | |
4a181359 SM |
2248 | /* There was no error: unarm the reset_on_error. */ |
2249 | XSETCDR (rvoe_arg, Qt); | |
e45fb8bf | 2250 | } |
d07c0804 | 2251 | |
fbebdf81 | 2252 | if (current_buffer->overlays_before || current_buffer->overlays_after) |
3be11131 RS |
2253 | report_overlay_modification (make_number (charpos), |
2254 | make_number (charpos + lenins), | |
d07c0804 | 2255 | 1, |
3be11131 RS |
2256 | make_number (charpos), |
2257 | make_number (charpos + lenins), | |
d07c0804 | 2258 | make_number (lendel)); |
c5ca0786 RS |
2259 | |
2260 | /* After an insertion, call the text properties | |
2261 | insert-behind-hooks or insert-in-front-hooks. */ | |
2262 | if (lendel == 0) | |
d6b81c0f AS |
2263 | report_interval_modification (make_number (charpos), |
2264 | make_number (charpos + lenins)); | |
4a181359 SM |
2265 | |
2266 | unbind_to (count, Qnil); | |
b45433b3 | 2267 | } |
fb2e7d14 RS |
2268 | |
2269 | Lisp_Object | |
971de7fb | 2270 | Fcombine_after_change_execute_1 (Lisp_Object val) |
fb2e7d14 RS |
2271 | { |
2272 | Vcombine_after_change_calls = val; | |
2273 | return val; | |
2274 | } | |
2275 | ||
2276 | DEFUN ("combine-after-change-execute", Fcombine_after_change_execute, | |
335c5470 PJ |
2277 | Scombine_after_change_execute, 0, 0, 0, |
2278 | doc: /* This function is for use internally in `combine-after-change-calls'. */) | |
5842a27b | 2279 | (void) |
fb2e7d14 | 2280 | { |
aed13378 | 2281 | int count = SPECPDL_INDEX (); |
ae19ba7c SM |
2282 | EMACS_INT beg, end, change; |
2283 | EMACS_INT begpos, endpos; | |
fb2e7d14 RS |
2284 | Lisp_Object tail; |
2285 | ||
101e446f KH |
2286 | if (NILP (combine_after_change_list)) |
2287 | return Qnil; | |
2288 | ||
c47a9ed1 CY |
2289 | /* It is rare for combine_after_change_buffer to be invalid, but |
2290 | possible. It can happen when combine-after-change-calls is | |
2291 | non-nil, and insertion calls a file handler (e.g. through | |
2292 | lock_file) which scribbles into a temp file -- cyd */ | |
2293 | if (!BUFFERP (combine_after_change_buffer) | |
2294 | || NILP (XBUFFER (combine_after_change_buffer)->name)) | |
2295 | { | |
2296 | combine_after_change_list = Qnil; | |
2297 | return Qnil; | |
2298 | } | |
2299 | ||
fb2e7d14 RS |
2300 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); |
2301 | ||
2302 | Fset_buffer (combine_after_change_buffer); | |
2303 | ||
2304 | /* # chars unchanged at beginning of buffer. */ | |
2305 | beg = Z - BEG; | |
2306 | /* # chars unchanged at end of buffer. */ | |
2307 | end = beg; | |
2308 | /* Total amount of insertion (negative for deletion). */ | |
2309 | change = 0; | |
2310 | ||
2311 | /* Scan the various individual changes, | |
2312 | accumulating the range info in BEG, END and CHANGE. */ | |
2313 | for (tail = combine_after_change_list; CONSP (tail); | |
03699b14 | 2314 | tail = XCDR (tail)) |
fb2e7d14 | 2315 | { |
e688a080 | 2316 | Lisp_Object elt; |
ae19ba7c | 2317 | EMACS_INT thisbeg, thisend, thischange; |
fb2e7d14 RS |
2318 | |
2319 | /* Extract the info from the next element. */ | |
03699b14 | 2320 | elt = XCAR (tail); |
fb2e7d14 RS |
2321 | if (! CONSP (elt)) |
2322 | continue; | |
03699b14 | 2323 | thisbeg = XINT (XCAR (elt)); |
fb2e7d14 | 2324 | |
03699b14 | 2325 | elt = XCDR (elt); |
fb2e7d14 RS |
2326 | if (! CONSP (elt)) |
2327 | continue; | |
03699b14 | 2328 | thisend = XINT (XCAR (elt)); |
fb2e7d14 | 2329 | |
03699b14 | 2330 | elt = XCDR (elt); |
fb2e7d14 RS |
2331 | if (! CONSP (elt)) |
2332 | continue; | |
03699b14 | 2333 | thischange = XINT (XCAR (elt)); |
fb2e7d14 RS |
2334 | |
2335 | /* Merge this range into the accumulated range. */ | |
2336 | change += thischange; | |
2337 | if (thisbeg < beg) | |
2338 | beg = thisbeg; | |
2339 | if (thisend < end) | |
2340 | end = thisend; | |
2341 | } | |
2342 | ||
2343 | /* Get the current start and end positions of the range | |
2344 | that was changed. */ | |
2345 | begpos = BEG + beg; | |
2346 | endpos = Z - end; | |
177c0ea7 | 2347 | |
fb2e7d14 RS |
2348 | /* We are about to handle these, so discard them. */ |
2349 | combine_after_change_list = Qnil; | |
2350 | ||
2351 | /* Now run the after-change functions for real. | |
2352 | Turn off the flag that defers them. */ | |
2353 | record_unwind_protect (Fcombine_after_change_execute_1, | |
2354 | Vcombine_after_change_calls); | |
2355 | signal_after_change (begpos, endpos - begpos - change, endpos - begpos); | |
0ef71121 | 2356 | update_compositions (begpos, endpos, CHECK_ALL); |
fb2e7d14 | 2357 | |
101e446f | 2358 | return unbind_to (count, Qnil); |
fb2e7d14 RS |
2359 | } |
2360 | \f | |
dfcf069d | 2361 | void |
971de7fb | 2362 | syms_of_insdel (void) |
fb2e7d14 RS |
2363 | { |
2364 | staticpro (&combine_after_change_list); | |
bf0bf758 | 2365 | staticpro (&combine_after_change_buffer); |
fb2e7d14 | 2366 | combine_after_change_list = Qnil; |
101e446f | 2367 | combine_after_change_buffer = Qnil; |
fb2e7d14 | 2368 | |
29208e82 | 2369 | DEFVAR_BOOL ("check-markers-debug-flag", check_markers_debug_flag, |
335c5470 | 2370 | doc: /* Non-nil means enable debugging checks for invalid marker positions. */); |
60ea6052 | 2371 | check_markers_debug_flag = 0; |
29208e82 | 2372 | DEFVAR_LISP ("combine-after-change-calls", Vcombine_after_change_calls, |
335c5470 | 2373 | doc: /* Used internally by the `combine-after-change-calls' macro. */); |
fb2e7d14 RS |
2374 | Vcombine_after_change_calls = Qnil; |
2375 | ||
29208e82 | 2376 | DEFVAR_BOOL ("inhibit-modification-hooks", inhibit_modification_hooks, |
335c5470 PJ |
2377 | doc: /* Non-nil means don't run any of the hooks that respond to buffer changes. |
2378 | This affects `before-change-functions' and `after-change-functions', | |
2379 | as well as hooks attached to text properties and overlays. */); | |
7baf49cf | 2380 | inhibit_modification_hooks = 0; |
d67b4f80 | 2381 | Qinhibit_modification_hooks = intern_c_string ("inhibit-modification-hooks"); |
27ea0af2 | 2382 | staticpro (&Qinhibit_modification_hooks); |
7baf49cf | 2383 | |
fb2e7d14 RS |
2384 | defsubr (&Scombine_after_change_execute); |
2385 | } | |
6b61353c | 2386 |