Commit | Line | Data |
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b45433b3 | 1 | /* Buffer insertion/deletion and gap motion for GNU Emacs. |
acaf905b | 2 | Copyright (C) 1985-1986, 1993-1995, 1997-2012 |
8cabe764 | 3 | Free Software Foundation, Inc. |
b45433b3 JB |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
9ec0b715 | 7 | GNU Emacs is free software: you can redistribute it and/or modify |
b45433b3 | 8 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
9 | the Free Software Foundation, either version 3 of the License, or |
10 | (at your option) any later version. | |
b45433b3 JB |
11 | |
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
9ec0b715 | 18 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
b45433b3 JB |
19 | |
20 | ||
18160b98 | 21 | #include <config.h> |
d7306fe6 | 22 | #include <setjmp.h> |
06d6db33 PE |
23 | |
24 | #include <intprops.h> | |
25 | ||
b45433b3 | 26 | #include "lisp.h" |
679194a6 | 27 | #include "intervals.h" |
b45433b3 | 28 | #include "buffer.h" |
811f7370 | 29 | #include "character.h" |
b45433b3 | 30 | #include "window.h" |
d014bf88 | 31 | #include "blockinput.h" |
dfcf069d | 32 | #include "region-cache.h" |
b45433b3 | 33 | |
ae19ba7c SM |
34 | static void insert_from_string_1 (Lisp_Object string, |
35 | EMACS_INT pos, EMACS_INT pos_byte, | |
36 | EMACS_INT nchars, EMACS_INT nbytes, | |
37 | int inherit, int before_markers); | |
38 | static void insert_from_buffer_1 (struct buffer *buf, | |
39 | EMACS_INT from, EMACS_INT nchars, | |
40 | int inherit); | |
41 | static void gap_left (EMACS_INT charpos, EMACS_INT bytepos, int newgap); | |
42 | static void gap_right (EMACS_INT charpos, EMACS_INT bytepos); | |
395ec62e | 43 | |
cd64ea1d | 44 | static Lisp_Object Fcombine_after_change_execute (void); |
fb2e7d14 | 45 | |
fb2e7d14 RS |
46 | /* List of elements of the form (BEG-UNCHANGED END-UNCHANGED CHANGE-AMOUNT) |
47 | describing changes which happened while combine_after_change_calls | |
48 | was nonzero. We use this to decide how to call them | |
49 | once the deferral ends. | |
50 | ||
51 | In each element. | |
52 | BEG-UNCHANGED is the number of chars before the changed range. | |
53 | END-UNCHANGED is the number of chars after the changed range, | |
54 | and CHANGE-AMOUNT is the number of characters inserted by the change | |
55 | (negative for a deletion). */ | |
77382fcc | 56 | static Lisp_Object combine_after_change_list; |
fb2e7d14 RS |
57 | |
58 | /* Buffer which combine_after_change_list is about. */ | |
77382fcc | 59 | static Lisp_Object combine_after_change_buffer; |
27ea0af2 GM |
60 | |
61 | Lisp_Object Qinhibit_modification_hooks; | |
4889fc82 PE |
62 | |
63 | static void signal_before_change (EMACS_INT, EMACS_INT, EMACS_INT *); | |
2b083808 | 64 | \f |
60ea6052 | 65 | #define CHECK_MARKERS() \ |
f0cb4a60 PE |
66 | do \ |
67 | { \ | |
68 | if (check_markers_debug_flag) \ | |
69 | check_markers (); \ | |
70 | } \ | |
71 | while (0) | |
60ea6052 | 72 | |
85876d07 | 73 | static void |
971de7fb | 74 | check_markers (void) |
60ea6052 | 75 | { |
dab0b04d | 76 | register struct Lisp_Marker *tail; |
4b4deea2 | 77 | int multibyte = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); |
60ea6052 | 78 | |
dab0b04d | 79 | for (tail = BUF_MARKERS (current_buffer); tail; tail = tail->next) |
60ea6052 | 80 | { |
dab0b04d | 81 | if (tail->buffer->text != current_buffer->text) |
60ea6052 | 82 | abort (); |
dab0b04d | 83 | if (tail->charpos > Z) |
60ea6052 | 84 | abort (); |
dab0b04d | 85 | if (tail->bytepos > Z_BYTE) |
60ea6052 | 86 | abort (); |
dab0b04d | 87 | if (multibyte && ! CHAR_HEAD_P (FETCH_BYTE (tail->bytepos))) |
9f3ede3c | 88 | abort (); |
60ea6052 RS |
89 | } |
90 | } | |
91 | \f | |
3be11131 | 92 | /* Move gap to position CHARPOS. |
b45433b3 JB |
93 | Note that this can quit! */ |
94 | ||
c660b094 | 95 | void |
ae19ba7c | 96 | move_gap (EMACS_INT charpos) |
b45433b3 | 97 | { |
3be11131 | 98 | move_gap_both (charpos, charpos_to_bytepos (charpos)); |
b45433b3 JB |
99 | } |
100 | ||
3be11131 RS |
101 | /* Move gap to byte position BYTEPOS, which is also char position CHARPOS. |
102 | Note that this can quit! */ | |
103 | ||
104 | void | |
ae19ba7c | 105 | move_gap_both (EMACS_INT charpos, EMACS_INT bytepos) |
3be11131 RS |
106 | { |
107 | if (bytepos < GPT_BYTE) | |
108 | gap_left (charpos, bytepos, 0); | |
109 | else if (bytepos > GPT_BYTE) | |
110 | gap_right (charpos, bytepos); | |
111 | } | |
112 | ||
113 | /* Move the gap to a position less than the current GPT. | |
114 | BYTEPOS describes the new position as a byte position, | |
115 | and CHARPOS is the corresponding char position. | |
b45433b3 JB |
116 | If NEWGAP is nonzero, then don't update beg_unchanged and end_unchanged. */ |
117 | ||
2bcaed71 | 118 | static void |
ae19ba7c | 119 | gap_left (EMACS_INT charpos, EMACS_INT bytepos, int newgap) |
b45433b3 JB |
120 | { |
121 | register unsigned char *to, *from; | |
ae19ba7c SM |
122 | register EMACS_INT i; |
123 | EMACS_INT new_s1; | |
b45433b3 | 124 | |
b45433b3 | 125 | if (!newgap) |
a50df55b | 126 | BUF_COMPUTE_UNCHANGED (current_buffer, charpos, GPT); |
b45433b3 | 127 | |
3be11131 | 128 | i = GPT_BYTE; |
b45433b3 JB |
129 | to = GAP_END_ADDR; |
130 | from = GPT_ADDR; | |
3be11131 | 131 | new_s1 = GPT_BYTE; |
b45433b3 JB |
132 | |
133 | /* Now copy the characters. To move the gap down, | |
134 | copy characters up. */ | |
135 | ||
136 | while (1) | |
137 | { | |
138 | /* I gets number of characters left to copy. */ | |
3be11131 | 139 | i = new_s1 - bytepos; |
b45433b3 JB |
140 | if (i == 0) |
141 | break; | |
142 | /* If a quit is requested, stop copying now. | |
3be11131 | 143 | Change BYTEPOS to be where we have actually moved the gap to. */ |
b45433b3 JB |
144 | if (QUITP) |
145 | { | |
3be11131 RS |
146 | bytepos = new_s1; |
147 | charpos = BYTE_TO_CHAR (bytepos); | |
b45433b3 JB |
148 | break; |
149 | } | |
150 | /* Move at most 32000 chars before checking again for a quit. */ | |
151 | if (i > 32000) | |
152 | i = 32000; | |
72af86bd AS |
153 | new_s1 -= i; |
154 | from -= i, to -= i; | |
155 | memmove (to, from, i); | |
b45433b3 JB |
156 | } |
157 | ||
f868cd8a JB |
158 | /* Adjust buffer data structure, to put the gap at BYTEPOS. |
159 | BYTEPOS is where the loop above stopped, which may be what | |
160 | was specified or may be where a quit was detected. */ | |
3be11131 RS |
161 | GPT_BYTE = bytepos; |
162 | GPT = charpos; | |
163 | if (bytepos < charpos) | |
164 | abort (); | |
469ff680 | 165 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
b45433b3 JB |
166 | QUIT; |
167 | } | |
168 | ||
2b34df4e | 169 | /* Move the gap to a position greater than the current GPT. |
3be11131 RS |
170 | BYTEPOS describes the new position as a byte position, |
171 | and CHARPOS is the corresponding char position. */ | |
172 | ||
2bcaed71 | 173 | static void |
ae19ba7c | 174 | gap_right (EMACS_INT charpos, EMACS_INT bytepos) |
b45433b3 JB |
175 | { |
176 | register unsigned char *to, *from; | |
ae19ba7c SM |
177 | register EMACS_INT i; |
178 | EMACS_INT new_s1; | |
b45433b3 | 179 | |
a50df55b | 180 | BUF_COMPUTE_UNCHANGED (current_buffer, charpos, GPT); |
b45433b3 | 181 | |
3be11131 | 182 | i = GPT_BYTE; |
b45433b3 JB |
183 | from = GAP_END_ADDR; |
184 | to = GPT_ADDR; | |
3be11131 | 185 | new_s1 = GPT_BYTE; |
b45433b3 JB |
186 | |
187 | /* Now copy the characters. To move the gap up, | |
188 | copy characters down. */ | |
189 | ||
190 | while (1) | |
191 | { | |
192 | /* I gets number of characters left to copy. */ | |
3be11131 | 193 | i = bytepos - new_s1; |
b45433b3 JB |
194 | if (i == 0) |
195 | break; | |
196 | /* If a quit is requested, stop copying now. | |
3be11131 | 197 | Change BYTEPOS to be where we have actually moved the gap to. */ |
b45433b3 JB |
198 | if (QUITP) |
199 | { | |
3be11131 RS |
200 | bytepos = new_s1; |
201 | charpos = BYTE_TO_CHAR (bytepos); | |
b45433b3 JB |
202 | break; |
203 | } | |
204 | /* Move at most 32000 chars before checking again for a quit. */ | |
205 | if (i > 32000) | |
206 | i = 32000; | |
72af86bd AS |
207 | new_s1 += i; |
208 | memmove (to, from, i); | |
209 | from += i, to += i; | |
b45433b3 JB |
210 | } |
211 | ||
3be11131 RS |
212 | GPT = charpos; |
213 | GPT_BYTE = bytepos; | |
214 | if (bytepos < charpos) | |
215 | abort (); | |
469ff680 | 216 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
b45433b3 JB |
217 | QUIT; |
218 | } | |
2b083808 | 219 | \f |
3be11131 RS |
220 | /* Adjust all markers for a deletion |
221 | whose range in bytes is FROM_BYTE to TO_BYTE. | |
222 | The range in charpos is FROM to TO. | |
223 | ||
224 | This function assumes that the gap is adjacent to | |
225 | or inside of the range being deleted. */ | |
beecb55b | 226 | |
809f3d51 | 227 | void |
ae19ba7c SM |
228 | adjust_markers_for_delete (EMACS_INT from, EMACS_INT from_byte, |
229 | EMACS_INT to, EMACS_INT to_byte) | |
3be11131 RS |
230 | { |
231 | Lisp_Object marker; | |
232 | register struct Lisp_Marker *m; | |
ae19ba7c | 233 | register EMACS_INT charpos; |
3be11131 | 234 | |
dab0b04d | 235 | for (m = BUF_MARKERS (current_buffer); m; m = m->next) |
3be11131 | 236 | { |
3be11131 RS |
237 | charpos = m->charpos; |
238 | ||
239 | if (charpos > Z) | |
240 | abort (); | |
241 | ||
242 | /* If the marker is after the deletion, | |
80f6e77c | 243 | relocate by number of chars / bytes deleted. */ |
3be11131 | 244 | if (charpos > to) |
80f6e77c RS |
245 | { |
246 | m->charpos -= to - from; | |
247 | m->bytepos -= to_byte - from_byte; | |
248 | } | |
80f6e77c | 249 | /* Here's the case where a marker is inside text being deleted. */ |
3be11131 RS |
250 | else if (charpos > from) |
251 | { | |
00de2987 | 252 | if (! m->insertion_type) |
dab0b04d | 253 | { /* Normal markers will end up at the beginning of the |
00de2987 | 254 | re-inserted text after undoing a deletion, and must be |
177c0ea7 | 255 | adjusted to move them to the correct place. */ |
dab0b04d | 256 | XSETMISC (marker, m); |
28259cac | 257 | record_marker_adjustment (marker, from - charpos); |
dab0b04d | 258 | } |
00de2987 | 259 | else if (charpos < to) |
dab0b04d | 260 | { /* Before-insertion markers will automatically move forward |
00de2987 MB |
261 | upon re-inserting the deleted text, so we have to arrange |
262 | for them to move backward to the correct position. */ | |
dab0b04d | 263 | XSETMISC (marker, m); |
28259cac | 264 | record_marker_adjustment (marker, to - charpos); |
dab0b04d | 265 | } |
3be11131 | 266 | m->charpos = from; |
80f6e77c | 267 | m->bytepos = from_byte; |
3be11131 | 268 | } |
00de2987 MB |
269 | /* Here's the case where a before-insertion marker is immediately |
270 | before the deleted region. */ | |
271 | else if (charpos == from && m->insertion_type) | |
272 | { | |
273 | /* Undoing the change uses normal insertion, which will | |
274 | incorrectly make MARKER move forward, so we arrange for it | |
275 | to then move backward to the correct place at the beginning | |
276 | of the deleted region. */ | |
dab0b04d | 277 | XSETMISC (marker, m); |
00de2987 MB |
278 | record_marker_adjustment (marker, to - from); |
279 | } | |
3be11131 RS |
280 | } |
281 | } | |
23b20a70 | 282 | |
2b083808 | 283 | \f |
432f78d2 RS |
284 | /* Adjust markers for an insertion that stretches from FROM / FROM_BYTE |
285 | to TO / TO_BYTE. We have to relocate the charpos of every marker | |
286 | that points after the insertion (but not their bytepos). | |
3be11131 | 287 | |
3be11131 RS |
288 | When a marker points at the insertion point, |
289 | we advance it if either its insertion-type is t | |
290 | or BEFORE_MARKERS is true. */ | |
291 | ||
292 | static void | |
ae19ba7c SM |
293 | adjust_markers_for_insert (EMACS_INT from, EMACS_INT from_byte, |
294 | EMACS_INT to, EMACS_INT to_byte, int before_markers) | |
beecb55b | 295 | { |
dab0b04d | 296 | struct Lisp_Marker *m; |
469ff680 | 297 | int adjusted = 0; |
ae19ba7c SM |
298 | EMACS_INT nchars = to - from; |
299 | EMACS_INT nbytes = to_byte - from_byte; | |
beecb55b | 300 | |
dab0b04d | 301 | for (m = BUF_MARKERS (current_buffer); m; m = m->next) |
beecb55b | 302 | { |
86a56ef3 SM |
303 | eassert (m->bytepos >= m->charpos |
304 | && m->bytepos - m->charpos <= Z_BYTE - Z); | |
1f90a790 | 305 | |
432f78d2 | 306 | if (m->bytepos == from_byte) |
469ff680 | 307 | { |
432f78d2 RS |
308 | if (m->insertion_type || before_markers) |
309 | { | |
b16afa45 KH |
310 | m->bytepos = to_byte; |
311 | m->charpos = to; | |
432f78d2 RS |
312 | if (m->insertion_type) |
313 | adjusted = 1; | |
314 | } | |
ce97a2d7 | 315 | } |
80f6e77c RS |
316 | else if (m->bytepos > from_byte) |
317 | { | |
318 | m->bytepos += nbytes; | |
b16afa45 | 319 | m->charpos += nchars; |
80f6e77c | 320 | } |
beecb55b | 321 | } |
3be11131 RS |
322 | |
323 | /* Adjusting only markers whose insertion-type is t may result in | |
409f2919 | 324 | - disordered start and end in overlays, and |
6b61353c | 325 | - disordered overlays in the slot `overlays_before' of current_buffer. */ |
469ff680 | 326 | if (adjusted) |
6b61353c | 327 | { |
5e617bc2 | 328 | fix_start_end_in_overlays (from, to); |
6b61353c KH |
329 | fix_overlays_before (current_buffer, from, to); |
330 | } | |
beecb55b RS |
331 | } |
332 | ||
3be11131 RS |
333 | /* Adjust point for an insertion of NBYTES bytes, which are NCHARS characters. |
334 | ||
335 | This is used only when the value of point changes due to an insert | |
336 | or delete; it does not represent a conceptual change in point as a | |
337 | marker. In particular, point is not crossing any interval | |
338 | boundaries, so there's no need to use the usual SET_PT macro. In | |
339 | fact it would be incorrect to do so, because either the old or the | |
340 | new value of point is out of sync with the current set of | |
341 | intervals. */ | |
342 | ||
a27a38d8 | 343 | static void |
ae19ba7c | 344 | adjust_point (EMACS_INT nchars, EMACS_INT nbytes) |
a27a38d8 | 345 | { |
cffc6f3b | 346 | SET_BUF_PT_BOTH (current_buffer, PT + nchars, PT_BYTE + nbytes); |
3be11131 | 347 | /* In a single-byte buffer, the two positions must be equal. */ |
86a56ef3 | 348 | eassert (PT_BYTE >= PT && PT_BYTE - PT <= ZV_BYTE - ZV); |
a27a38d8 | 349 | } |
b45433b3 | 350 | \f |
652838b5 KH |
351 | /* Adjust markers for a replacement of a text at FROM (FROM_BYTE) of |
352 | length OLD_CHARS (OLD_BYTES) to a new text of length NEW_CHARS | |
adee4f91 KH |
353 | (NEW_BYTES). It is assumed that OLD_CHARS > 0, i.e., this is not |
354 | an insertion. */ | |
652838b5 KH |
355 | |
356 | static void | |
ae19ba7c SM |
357 | adjust_markers_for_replace (EMACS_INT from, EMACS_INT from_byte, |
358 | EMACS_INT old_chars, EMACS_INT old_bytes, | |
359 | EMACS_INT new_chars, EMACS_INT new_bytes) | |
652838b5 | 360 | { |
dab0b04d | 361 | register struct Lisp_Marker *m; |
ae19ba7c SM |
362 | EMACS_INT prev_to_byte = from_byte + old_bytes; |
363 | EMACS_INT diff_chars = new_chars - old_chars; | |
364 | EMACS_INT diff_bytes = new_bytes - old_bytes; | |
652838b5 | 365 | |
dab0b04d | 366 | for (m = BUF_MARKERS (current_buffer); m; m = m->next) |
652838b5 | 367 | { |
adee4f91 | 368 | if (m->bytepos >= prev_to_byte) |
652838b5 | 369 | { |
adee4f91 KH |
370 | m->charpos += diff_chars; |
371 | m->bytepos += diff_bytes; | |
652838b5 | 372 | } |
adee4f91 | 373 | else if (m->bytepos > from_byte) |
652838b5 | 374 | { |
652838b5 | 375 | m->charpos = from; |
b16afa45 | 376 | m->bytepos = from_byte; |
652838b5 | 377 | } |
652838b5 | 378 | } |
3019692c KH |
379 | |
380 | CHECK_MARKERS (); | |
652838b5 KH |
381 | } |
382 | ||
383 | \f | |
99561444 PE |
384 | void |
385 | buffer_overflow (void) | |
386 | { | |
387 | error ("Maximum buffer size exceeded"); | |
388 | } | |
389 | ||
3be11131 | 390 | /* Make the gap NBYTES_ADDED bytes longer. */ |
b45433b3 | 391 | |
85876d07 | 392 | static void |
ae19ba7c | 393 | make_gap_larger (EMACS_INT nbytes_added) |
b45433b3 | 394 | { |
b45433b3 | 395 | Lisp_Object tem; |
ae19ba7c SM |
396 | EMACS_INT real_gap_loc; |
397 | EMACS_INT real_gap_loc_byte; | |
398 | EMACS_INT old_gap_size; | |
1c8e352f PE |
399 | EMACS_INT current_size = Z_BYTE - BEG_BYTE + GAP_SIZE; |
400 | enum { enough_for_a_while = 2000 }; | |
b45433b3 | 401 | |
1c8e352f PE |
402 | if (BUF_BYTES_MAX - current_size < nbytes_added) |
403 | buffer_overflow (); | |
b45433b3 | 404 | |
1c8e352f PE |
405 | /* If we have to get more space, get enough to last a while; |
406 | but do not exceed the maximum buffer size. */ | |
407 | nbytes_added = min (nbytes_added + enough_for_a_while, | |
408 | BUF_BYTES_MAX - current_size); | |
94056516 | 409 | |
71a7bfa7 | 410 | enlarge_buffer_text (current_buffer, nbytes_added); |
b45433b3 JB |
411 | |
412 | /* Prevent quitting in move_gap. */ | |
413 | tem = Vinhibit_quit; | |
414 | Vinhibit_quit = Qt; | |
415 | ||
416 | real_gap_loc = GPT; | |
3be11131 | 417 | real_gap_loc_byte = GPT_BYTE; |
b45433b3 JB |
418 | old_gap_size = GAP_SIZE; |
419 | ||
420 | /* Call the newly allocated space a gap at the end of the whole space. */ | |
421 | GPT = Z + GAP_SIZE; | |
7d92db58 | 422 | GPT_BYTE = Z_BYTE + GAP_SIZE; |
3be11131 | 423 | GAP_SIZE = nbytes_added; |
b45433b3 JB |
424 | |
425 | /* Move the new gap down to be consecutive with the end of the old one. | |
426 | This adjusts the markers properly too. */ | |
3be11131 | 427 | gap_left (real_gap_loc + old_gap_size, real_gap_loc_byte + old_gap_size, 1); |
b45433b3 JB |
428 | |
429 | /* Now combine the two into one large gap. */ | |
430 | GAP_SIZE += old_gap_size; | |
431 | GPT = real_gap_loc; | |
3be11131 | 432 | GPT_BYTE = real_gap_loc_byte; |
b45433b3 | 433 | |
469ff680 KH |
434 | /* Put an anchor. */ |
435 | *(Z_ADDR) = 0; | |
436 | ||
b45433b3 JB |
437 | Vinhibit_quit = tem; |
438 | } | |
8af5b8e7 | 439 | |
b58c5c4a | 440 | #if defined USE_MMAP_FOR_BUFFERS || defined REL_ALLOC || defined DOUG_LEA_MALLOC |
8af5b8e7 | 441 | |
7273faa1 | 442 | /* Make the gap NBYTES_REMOVED bytes shorter. */ |
8af5b8e7 | 443 | |
85876d07 | 444 | static void |
ae19ba7c | 445 | make_gap_smaller (EMACS_INT nbytes_removed) |
8af5b8e7 AI |
446 | { |
447 | Lisp_Object tem; | |
ae19ba7c SM |
448 | EMACS_INT real_gap_loc; |
449 | EMACS_INT real_gap_loc_byte; | |
450 | EMACS_INT real_Z; | |
451 | EMACS_INT real_Z_byte; | |
452 | EMACS_INT real_beg_unchanged; | |
453 | EMACS_INT new_gap_size; | |
8af5b8e7 AI |
454 | |
455 | /* Make sure the gap is at least 20 bytes. */ | |
456 | if (GAP_SIZE - nbytes_removed < 20) | |
457 | nbytes_removed = GAP_SIZE - 20; | |
458 | ||
459 | /* Prevent quitting in move_gap. */ | |
460 | tem = Vinhibit_quit; | |
461 | Vinhibit_quit = Qt; | |
462 | ||
463 | real_gap_loc = GPT; | |
464 | real_gap_loc_byte = GPT_BYTE; | |
73df3b72 | 465 | new_gap_size = GAP_SIZE - nbytes_removed; |
8af5b8e7 AI |
466 | real_Z = Z; |
467 | real_Z_byte = Z_BYTE; | |
73df3b72 | 468 | real_beg_unchanged = BEG_UNCHANGED; |
8af5b8e7 AI |
469 | |
470 | /* Pretend that the last unwanted part of the gap is the entire gap, | |
471 | and that the first desired part of the gap is part of the buffer | |
472 | text. */ | |
72af86bd | 473 | memset (GPT_ADDR, 0, new_gap_size); |
73df3b72 KS |
474 | GPT += new_gap_size; |
475 | GPT_BYTE += new_gap_size; | |
476 | Z += new_gap_size; | |
477 | Z_BYTE += new_gap_size; | |
8af5b8e7 AI |
478 | GAP_SIZE = nbytes_removed; |
479 | ||
480 | /* Move the unwanted pretend gap to the end of the buffer. This | |
481 | adjusts the markers properly too. */ | |
482 | gap_right (Z, Z_BYTE); | |
483 | ||
484 | enlarge_buffer_text (current_buffer, -nbytes_removed); | |
485 | ||
486 | /* Now restore the desired gap. */ | |
73df3b72 | 487 | GAP_SIZE = new_gap_size; |
8af5b8e7 AI |
488 | GPT = real_gap_loc; |
489 | GPT_BYTE = real_gap_loc_byte; | |
490 | Z = real_Z; | |
491 | Z_BYTE = real_Z_byte; | |
73df3b72 | 492 | BEG_UNCHANGED = real_beg_unchanged; |
8af5b8e7 AI |
493 | |
494 | /* Put an anchor. */ | |
495 | *(Z_ADDR) = 0; | |
496 | ||
497 | Vinhibit_quit = tem; | |
498 | } | |
499 | ||
b58c5c4a PE |
500 | #endif /* USE_MMAP_FOR_BUFFERS || REL_ALLOC || DOUG_LEA_MALLOC */ |
501 | ||
8af5b8e7 | 502 | void |
ae19ba7c | 503 | make_gap (EMACS_INT nbytes_added) |
8af5b8e7 AI |
504 | { |
505 | if (nbytes_added >= 0) | |
506 | make_gap_larger (nbytes_added); | |
d77fbc16 | 507 | #if defined USE_MMAP_FOR_BUFFERS || defined REL_ALLOC || defined DOUG_LEA_MALLOC |
8af5b8e7 AI |
508 | else |
509 | make_gap_smaller (-nbytes_added); | |
510 | #endif | |
511 | } | |
b45433b3 | 512 | \f |
2b083808 RS |
513 | /* Copy NBYTES bytes of text from FROM_ADDR to TO_ADDR. |
514 | FROM_MULTIBYTE says whether the incoming text is multibyte. | |
515 | TO_MULTIBYTE says whether to store the text as multibyte. | |
516 | If FROM_MULTIBYTE != TO_MULTIBYTE, we convert. | |
517 | ||
518 | Return the number of bytes stored at TO_ADDR. */ | |
519 | ||
ae19ba7c SM |
520 | EMACS_INT |
521 | copy_text (const unsigned char *from_addr, unsigned char *to_addr, | |
522 | EMACS_INT nbytes, int from_multibyte, int to_multibyte) | |
2b083808 RS |
523 | { |
524 | if (from_multibyte == to_multibyte) | |
525 | { | |
72af86bd | 526 | memcpy (to_addr, from_addr, nbytes); |
2b083808 RS |
527 | return nbytes; |
528 | } | |
529 | else if (from_multibyte) | |
530 | { | |
ae19ba7c SM |
531 | EMACS_INT nchars = 0; |
532 | EMACS_INT bytes_left = nbytes; | |
f44cbcd8 | 533 | |
2b083808 RS |
534 | while (bytes_left > 0) |
535 | { | |
b16afa45 | 536 | int thislen, c; |
62a6e103 | 537 | c = STRING_CHAR_AND_LENGTH (from_addr, thislen); |
1ede3eb6 KH |
538 | if (! ASCII_CHAR_P (c)) |
539 | c &= 0xFF; | |
f44cbcd8 | 540 | *to_addr++ = c; |
2b083808 | 541 | from_addr += thislen; |
7e79b8e0 | 542 | bytes_left -= thislen; |
2b083808 RS |
543 | nchars++; |
544 | } | |
545 | return nchars; | |
546 | } | |
547 | else | |
548 | { | |
549 | unsigned char *initial_to_addr = to_addr; | |
550 | ||
551 | /* Convert single-byte to multibyte. */ | |
552 | while (nbytes > 0) | |
553 | { | |
554 | int c = *from_addr++; | |
2b083808 | 555 | |
4c0354d7 | 556 | if (!ASCII_CHAR_P (c)) |
2b083808 | 557 | { |
4c0354d7 | 558 | c = BYTE8_TO_CHAR (c); |
0ef71121 | 559 | to_addr += CHAR_STRING (c, to_addr); |
2b083808 RS |
560 | nbytes--; |
561 | } | |
562 | else | |
563 | /* Special case for speed. */ | |
564 | *to_addr++ = c, nbytes--; | |
565 | } | |
566 | return to_addr - initial_to_addr; | |
567 | } | |
568 | } | |
2b083808 | 569 | \f |
b45433b3 | 570 | /* Insert a string of specified length before point. |
2b083808 RS |
571 | This function judges multibyteness based on |
572 | enable_multibyte_characters in the current buffer; | |
573 | it never converts between single-byte and multibyte. | |
574 | ||
ef29f213 KH |
575 | DO NOT use this for the contents of a Lisp string or a Lisp buffer! |
576 | prepare_to_modify_buffer could relocate the text. */ | |
b45433b3 | 577 | |
c660b094 | 578 | void |
b68864e5 | 579 | insert (const char *string, EMACS_INT nbytes) |
b45433b3 | 580 | { |
3be11131 | 581 | if (nbytes > 0) |
395ec62e | 582 | { |
b68864e5 | 583 | EMACS_INT len = chars_in_text ((unsigned char *) string, nbytes), opoint; |
bab3eee1 EZ |
584 | insert_1_both (string, len, nbytes, 0, 1, 0); |
585 | opoint = PT - len; | |
586 | signal_after_change (opoint, 0, len); | |
0ef71121 | 587 | update_compositions (opoint, PT, CHECK_BORDER); |
cd11ef31 RS |
588 | } |
589 | } | |
590 | ||
2b083808 RS |
591 | /* Likewise, but inherit text properties from neighboring characters. */ |
592 | ||
c660b094 | 593 | void |
b68864e5 | 594 | insert_and_inherit (const char *string, EMACS_INT nbytes) |
cd11ef31 | 595 | { |
3be11131 | 596 | if (nbytes > 0) |
cd11ef31 | 597 | { |
b68864e5 | 598 | EMACS_INT len = chars_in_text ((unsigned char *) string, nbytes), opoint; |
bab3eee1 EZ |
599 | insert_1_both (string, len, nbytes, 1, 1, 0); |
600 | opoint = PT - len; | |
601 | signal_after_change (opoint, 0, len); | |
0ef71121 | 602 | update_compositions (opoint, PT, CHECK_BORDER); |
395ec62e KH |
603 | } |
604 | } | |
b45433b3 | 605 | |
2b083808 | 606 | /* Insert the character C before point. Do not inherit text properties. */ |
3be11131 | 607 | |
c660b094 | 608 | void |
ae19ba7c | 609 | insert_char (int c) |
3be11131 | 610 | { |
0ef71121 | 611 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
2b083808 RS |
612 | int len; |
613 | ||
4b4deea2 | 614 | if (! NILP (BVAR (current_buffer, enable_multibyte_characters))) |
0ef71121 | 615 | len = CHAR_STRING (c, str); |
2b083808 RS |
616 | else |
617 | { | |
618 | len = 1; | |
0ef71121 | 619 | str[0] = c; |
2b083808 | 620 | } |
3be11131 | 621 | |
b68864e5 | 622 | insert ((char *) str, len); |
3be11131 RS |
623 | } |
624 | ||
2b083808 | 625 | /* Insert the null-terminated string S before point. */ |
3be11131 RS |
626 | |
627 | void | |
ae19ba7c | 628 | insert_string (const char *s) |
3be11131 RS |
629 | { |
630 | insert (s, strlen (s)); | |
631 | } | |
632 | ||
633 | /* Like `insert' except that all markers pointing at the place where | |
634 | the insertion happens are adjusted to point after it. | |
635 | Don't use this function to insert part of a Lisp string, | |
636 | since gc could happen and relocate it. */ | |
637 | ||
638 | void | |
b68864e5 | 639 | insert_before_markers (const char *string, EMACS_INT nbytes) |
3be11131 RS |
640 | { |
641 | if (nbytes > 0) | |
642 | { | |
b68864e5 | 643 | EMACS_INT len = chars_in_text ((unsigned char *) string, nbytes), opoint; |
bab3eee1 EZ |
644 | insert_1_both (string, len, nbytes, 0, 1, 1); |
645 | opoint = PT - len; | |
646 | signal_after_change (opoint, 0, len); | |
0ef71121 | 647 | update_compositions (opoint, PT, CHECK_BORDER); |
3be11131 RS |
648 | } |
649 | } | |
650 | ||
2b083808 RS |
651 | /* Likewise, but inherit text properties from neighboring characters. */ |
652 | ||
3be11131 | 653 | void |
b68864e5 | 654 | insert_before_markers_and_inherit (const char *string, |
ae19ba7c | 655 | EMACS_INT nbytes) |
3be11131 RS |
656 | { |
657 | if (nbytes > 0) | |
658 | { | |
b68864e5 | 659 | EMACS_INT len = chars_in_text ((unsigned char *) string, nbytes), opoint; |
bab3eee1 EZ |
660 | insert_1_both (string, len, nbytes, 1, 1, 1); |
661 | opoint = PT - len; | |
662 | signal_after_change (opoint, 0, len); | |
0ef71121 | 663 | update_compositions (opoint, PT, CHECK_BORDER); |
3be11131 RS |
664 | } |
665 | } | |
1f90a790 | 666 | |
3be11131 RS |
667 | /* Subroutine used by the insert functions above. */ |
668 | ||
669 | void | |
b68864e5 | 670 | insert_1 (const char *string, EMACS_INT nbytes, |
ae19ba7c | 671 | int inherit, int prepare, int before_markers) |
395ec62e | 672 | { |
b68864e5 PE |
673 | insert_1_both (string, chars_in_text ((unsigned char *) string, nbytes), |
674 | nbytes, inherit, prepare, before_markers); | |
432f78d2 | 675 | } |
b16afa45 | 676 | |
1f90a790 | 677 | \f |
b16afa45 KH |
678 | #ifdef BYTE_COMBINING_DEBUG |
679 | ||
432f78d2 RS |
680 | /* See if the bytes before POS/POS_BYTE combine with bytes |
681 | at the start of STRING to form a single character. | |
ce97a2d7 | 682 | If so, return the number of bytes at the start of STRING |
432f78d2 | 683 | which combine in this way. Otherwise, return 0. */ |
b45433b3 | 684 | |
432f78d2 | 685 | int |
ae19ba7c SM |
686 | count_combining_before (const unsigned char *string, EMACS_INT length, |
687 | EMACS_INT pos, EMACS_INT pos_byte) | |
432f78d2 | 688 | { |
cae184f2 | 689 | int len, combining_bytes; |
641a26d2 | 690 | const unsigned char *p; |
b45433b3 | 691 | |
432f78d2 RS |
692 | if (NILP (current_buffer->enable_multibyte_characters)) |
693 | return 0; | |
cae184f2 KH |
694 | |
695 | /* At first, we can exclude the following cases: | |
696 | (1) STRING[0] can't be a following byte of multibyte sequence. | |
697 | (2) POS is the start of the current buffer. | |
698 | (3) A character before POS is not a multibyte character. */ | |
699 | if (length == 0 || CHAR_HEAD_P (*string)) /* case (1) */ | |
432f78d2 | 700 | return 0; |
cae184f2 | 701 | if (pos_byte == BEG_BYTE) /* case (2) */ |
432f78d2 | 702 | return 0; |
cae184f2 KH |
703 | len = 1; |
704 | p = BYTE_POS_ADDR (pos_byte - 1); | |
705 | while (! CHAR_HEAD_P (*p)) p--, len++; | |
409f2919 | 706 | if (! LEADING_CODE_P (*p)) /* case (3) */ |
432f78d2 | 707 | return 0; |
cae184f2 | 708 | |
cae184f2 KH |
709 | combining_bytes = BYTES_BY_CHAR_HEAD (*p) - len; |
710 | if (combining_bytes <= 0) | |
711 | /* The character preceding POS is, complete and no room for | |
712 | combining bytes (combining_bytes == 0), or an independent 8-bit | |
713 | character (combining_bytes < 0). */ | |
432f78d2 | 714 | return 0; |
ce97a2d7 | 715 | |
cae184f2 KH |
716 | /* We have a combination situation. Count the bytes at STRING that |
717 | may combine. */ | |
718 | p = string + 1; | |
ce97a2d7 RS |
719 | while (!CHAR_HEAD_P (*p) && p < string + length) |
720 | p++; | |
721 | ||
cae184f2 | 722 | return (combining_bytes < p - string ? combining_bytes : p - string); |
432f78d2 | 723 | } |
b45433b3 | 724 | |
432f78d2 RS |
725 | /* See if the bytes after POS/POS_BYTE combine with bytes |
726 | at the end of STRING to form a single character. | |
727 | If so, return the number of bytes after POS/POS_BYTE | |
728 | which combine in this way. Otherwise, return 0. */ | |
679194a6 | 729 | |
432f78d2 | 730 | int |
ae19ba7c SM |
731 | count_combining_after (const unsigned char *string, |
732 | EMACS_INT length, EMACS_INT pos, EMACS_INT pos_byte) | |
432f78d2 | 733 | { |
ae19ba7c SM |
734 | EMACS_INT opos_byte = pos_byte; |
735 | EMACS_INT i; | |
736 | EMACS_INT bytes; | |
cae184f2 | 737 | unsigned char *bufp; |
3be11131 | 738 | |
432f78d2 RS |
739 | if (NILP (current_buffer->enable_multibyte_characters)) |
740 | return 0; | |
cae184f2 KH |
741 | |
742 | /* At first, we can exclude the following cases: | |
743 | (1) The last byte of STRING is an ASCII. | |
744 | (2) POS is the last of the current buffer. | |
745 | (3) A character at POS can't be a following byte of multibyte | |
746 | character. */ | |
747 | if (length > 0 && ASCII_BYTE_P (string[length - 1])) /* case (1) */ | |
748 | return 0; | |
749 | if (pos_byte == Z_BYTE) /* case (2) */ | |
432f78d2 | 750 | return 0; |
cae184f2 KH |
751 | bufp = BYTE_POS_ADDR (pos_byte); |
752 | if (CHAR_HEAD_P (*bufp)) /* case (3) */ | |
753 | return 0; | |
754 | ||
432f78d2 | 755 | i = length - 1; |
b57a7b0b | 756 | while (i >= 0 && ! CHAR_HEAD_P (string[i])) |
432f78d2 RS |
757 | { |
758 | i--; | |
759 | } | |
b57a7b0b KH |
760 | if (i < 0) |
761 | { | |
cae184f2 KH |
762 | /* All characters in STRING are not character head. We must |
763 | check also preceding bytes at POS. We are sure that the gap | |
764 | is at POS. */ | |
765 | unsigned char *p = BEG_ADDR; | |
b57a7b0b | 766 | i = pos_byte - 2; |
cae184f2 | 767 | while (i >= 0 && ! CHAR_HEAD_P (p[i])) |
b57a7b0b | 768 | i--; |
409f2919 | 769 | if (i < 0 || !LEADING_CODE_P (p[i])) |
b57a7b0b | 770 | return 0; |
0ef71121 | 771 | |
cae184f2 KH |
772 | bytes = BYTES_BY_CHAR_HEAD (p[i]); |
773 | return (bytes <= pos_byte - 1 - i + length | |
774 | ? 0 | |
775 | : bytes - (pos_byte - 1 - i + length)); | |
b57a7b0b | 776 | } |
409f2919 | 777 | if (!LEADING_CODE_P (string[i])) |
432f78d2 RS |
778 | return 0; |
779 | ||
cae184f2 KH |
780 | bytes = BYTES_BY_CHAR_HEAD (string[i]) - (length - i); |
781 | bufp++, pos_byte++; | |
782 | while (!CHAR_HEAD_P (*bufp)) bufp++, pos_byte++; | |
cd11ef31 | 783 | |
cae184f2 | 784 | return (bytes <= pos_byte - opos_byte ? bytes : pos_byte - opos_byte); |
b45433b3 | 785 | } |
2b083808 | 786 | |
b16afa45 | 787 | #endif |
9f3ede3c | 788 | |
1f90a790 | 789 | \f |
2b083808 RS |
790 | /* Insert a sequence of NCHARS chars which occupy NBYTES bytes |
791 | starting at STRING. INHERIT, PREPARE and BEFORE_MARKERS | |
792 | are the same as in insert_1. */ | |
793 | ||
794 | void | |
b68864e5 | 795 | insert_1_both (const char *string, |
ae19ba7c SM |
796 | EMACS_INT nchars, EMACS_INT nbytes, |
797 | int inherit, int prepare, int before_markers) | |
2b083808 | 798 | { |
da80a8d5 GM |
799 | if (nchars == 0) |
800 | return; | |
177c0ea7 | 801 | |
4b4deea2 | 802 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
57404188 KH |
803 | nchars = nbytes; |
804 | ||
35d63725 RS |
805 | if (prepare) |
806 | /* Do this before moving and increasing the gap, | |
807 | because the before-change hooks might move the gap | |
808 | or make it smaller. */ | |
809 | prepare_to_modify_buffer (PT, PT, NULL); | |
810 | ||
2b083808 RS |
811 | if (PT != GPT) |
812 | move_gap_both (PT, PT_BYTE); | |
813 | if (GAP_SIZE < nbytes) | |
814 | make_gap (nbytes - GAP_SIZE); | |
815 | ||
b16afa45 KH |
816 | #ifdef BYTE_COMBINING_DEBUG |
817 | if (count_combining_before (string, nbytes, PT, PT_BYTE) | |
818 | || count_combining_after (string, nbytes, PT, PT_BYTE)) | |
819 | abort (); | |
820 | #endif | |
432f78d2 RS |
821 | |
822 | /* Record deletion of the surrounding text that combines with | |
823 | the insertion. This, together with recording the insertion, | |
b16afa45 KH |
824 | will add up to the right stuff in the undo list. */ |
825 | record_insert (PT, nchars); | |
2b083808 | 826 | MODIFF++; |
3e145152 | 827 | CHARS_MODIFF = MODIFF; |
2b083808 | 828 | |
72af86bd | 829 | memcpy (GPT_ADDR, string, nbytes); |
2b083808 | 830 | |
2b083808 | 831 | GAP_SIZE -= nbytes; |
1f90a790 RS |
832 | GPT += nchars; |
833 | ZV += nchars; | |
834 | Z += nchars; | |
2b083808 RS |
835 | GPT_BYTE += nbytes; |
836 | ZV_BYTE += nbytes; | |
837 | Z_BYTE += nbytes; | |
838 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ | |
1f90a790 | 839 | |
1f90a790 RS |
840 | if (GPT_BYTE < GPT) |
841 | abort (); | |
842 | ||
9dde4e0c KS |
843 | /* The insert may have been in the unchanged region, so check again. */ |
844 | if (Z - GPT < END_UNCHANGED) | |
845 | END_UNCHANGED = Z - GPT; | |
846 | ||
1f90a790 | 847 | adjust_overlays_for_insert (PT, nchars); |
432f78d2 | 848 | adjust_markers_for_insert (PT, PT_BYTE, |
1f90a790 | 849 | PT + nchars, PT_BYTE + nbytes, |
2b083808 | 850 | before_markers); |
ce97a2d7 | 851 | |
1f90a790 | 852 | if (BUF_INTERVALS (current_buffer) != 0) |
1f90a790 RS |
853 | offset_intervals (current_buffer, PT, nchars); |
854 | ||
ce97a2d7 | 855 | if (!inherit && BUF_INTERVALS (current_buffer) != 0) |
f2cab2ea GM |
856 | set_text_properties (make_number (PT), make_number (PT + nchars), |
857 | Qnil, Qnil, Qnil); | |
ce97a2d7 | 858 | |
b16afa45 | 859 | adjust_point (nchars, nbytes); |
828f1ed3 KH |
860 | |
861 | CHECK_MARKERS (); | |
2b083808 | 862 | } |
3be11131 | 863 | \f |
679194a6 | 864 | /* Insert the part of the text of STRING, a Lisp object assumed to be |
2b083808 RS |
865 | of type string, consisting of the LENGTH characters (LENGTH_BYTE bytes) |
866 | starting at position POS / POS_BYTE. If the text of STRING has properties, | |
867 | copy them into the buffer. | |
679194a6 JA |
868 | |
869 | It does not work to use `insert' for this, because a GC could happen | |
72af86bd | 870 | before we copy the stuff into the buffer, and relocate the string |
7e1ea612 | 871 | without insert noticing. */ |
679194a6 | 872 | |
c660b094 | 873 | void |
ae19ba7c SM |
874 | insert_from_string (Lisp_Object string, EMACS_INT pos, EMACS_INT pos_byte, |
875 | EMACS_INT length, EMACS_INT length_byte, int inherit) | |
395ec62e | 876 | { |
ae19ba7c | 877 | EMACS_INT opoint = PT; |
d8bf4256 RS |
878 | |
879 | if (SCHARS (string) == 0) | |
880 | return; | |
881 | ||
62b82678 RS |
882 | insert_from_string_1 (string, pos, pos_byte, length, length_byte, |
883 | inherit, 0); | |
884 | signal_after_change (opoint, 0, PT - opoint); | |
0ef71121 | 885 | update_compositions (opoint, PT, CHECK_BORDER); |
395ec62e KH |
886 | } |
887 | ||
2b083808 RS |
888 | /* Like `insert_from_string' except that all markers pointing |
889 | at the place where the insertion happens are adjusted to point after it. */ | |
3be11131 RS |
890 | |
891 | void | |
ae19ba7c SM |
892 | insert_from_string_before_markers (Lisp_Object string, |
893 | EMACS_INT pos, EMACS_INT pos_byte, | |
894 | EMACS_INT length, EMACS_INT length_byte, | |
895 | int inherit) | |
3be11131 | 896 | { |
ae19ba7c | 897 | EMACS_INT opoint = PT; |
d8bf4256 RS |
898 | |
899 | if (SCHARS (string) == 0) | |
900 | return; | |
901 | ||
62b82678 RS |
902 | insert_from_string_1 (string, pos, pos_byte, length, length_byte, |
903 | inherit, 1); | |
904 | signal_after_change (opoint, 0, PT - opoint); | |
0ef71121 | 905 | update_compositions (opoint, PT, CHECK_BORDER); |
3be11131 RS |
906 | } |
907 | ||
908 | /* Subroutine of the insertion functions above. */ | |
909 | ||
910 | static void | |
ae19ba7c SM |
911 | insert_from_string_1 (Lisp_Object string, EMACS_INT pos, EMACS_INT pos_byte, |
912 | EMACS_INT nchars, EMACS_INT nbytes, | |
913 | int inherit, int before_markers) | |
b45433b3 | 914 | { |
b45433b3 | 915 | struct gcpro gcpro1; |
ae19ba7c | 916 | EMACS_INT outgoing_nbytes = nbytes; |
ce97a2d7 | 917 | INTERVAL intervals; |
2b083808 RS |
918 | |
919 | /* Make OUTGOING_NBYTES describe the text | |
920 | as it will be inserted in this buffer. */ | |
921 | ||
4b4deea2 | 922 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
2b083808 | 923 | outgoing_nbytes = nchars; |
2a1d8be0 | 924 | else if (! STRING_MULTIBYTE (string)) |
2b083808 | 925 | outgoing_nbytes |
f7e233a8 | 926 | = count_size_as_multibyte (SDATA (string) + pos_byte, |
2b083808 | 927 | nbytes); |
b45433b3 | 928 | |
b45433b3 | 929 | GCPRO1 (string); |
35d63725 RS |
930 | /* Do this before moving and increasing the gap, |
931 | because the before-change hooks might move the gap | |
932 | or make it smaller. */ | |
d206af14 | 933 | prepare_to_modify_buffer (PT, PT, NULL); |
b45433b3 | 934 | |
2bcaed71 | 935 | if (PT != GPT) |
3be11131 | 936 | move_gap_both (PT, PT_BYTE); |
534b9840 | 937 | if (GAP_SIZE < outgoing_nbytes) |
2b083808 | 938 | make_gap (outgoing_nbytes - GAP_SIZE); |
b45433b3 JB |
939 | UNGCPRO; |
940 | ||
2b083808 RS |
941 | /* Copy the string text into the buffer, perhaps converting |
942 | between single-byte and multibyte. */ | |
d5db4077 | 943 | copy_text (SDATA (string) + pos_byte, GPT_ADDR, nbytes, |
2a1d8be0 | 944 | STRING_MULTIBYTE (string), |
4b4deea2 | 945 | ! NILP (BVAR (current_buffer, enable_multibyte_characters))); |
b45433b3 | 946 | |
b16afa45 | 947 | #ifdef BYTE_COMBINING_DEBUG |
432f78d2 RS |
948 | /* We have copied text into the gap, but we have not altered |
949 | PT or PT_BYTE yet. So we can pass PT and PT_BYTE | |
950 | to these functions and get the same results as we would | |
951 | have got earlier on. Meanwhile, PT_ADDR does point to | |
952 | the text that has been stored by copy_text. */ | |
b16afa45 KH |
953 | if (count_combining_before (GPT_ADDR, outgoing_nbytes, PT, PT_BYTE) |
954 | || count_combining_after (GPT_ADDR, outgoing_nbytes, PT, PT_BYTE)) | |
955 | abort (); | |
956 | #endif | |
432f78d2 | 957 | |
b16afa45 | 958 | record_insert (PT, nchars); |
432f78d2 | 959 | MODIFF++; |
3e145152 | 960 | CHARS_MODIFF = MODIFF; |
432f78d2 | 961 | |
7792090e | 962 | GAP_SIZE -= outgoing_nbytes; |
1f90a790 RS |
963 | GPT += nchars; |
964 | ZV += nchars; | |
965 | Z += nchars; | |
2b083808 RS |
966 | GPT_BYTE += outgoing_nbytes; |
967 | ZV_BYTE += outgoing_nbytes; | |
968 | Z_BYTE += outgoing_nbytes; | |
469ff680 | 969 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
3be11131 RS |
970 | |
971 | if (GPT_BYTE < GPT) | |
972 | abort (); | |
679194a6 | 973 | |
9dde4e0c KS |
974 | /* The insert may have been in the unchanged region, so check again. */ |
975 | if (Z - GPT < END_UNCHANGED) | |
976 | END_UNCHANGED = Z - GPT; | |
977 | ||
1f90a790 RS |
978 | adjust_overlays_for_insert (PT, nchars); |
979 | adjust_markers_for_insert (PT, PT_BYTE, PT + nchars, | |
980 | PT_BYTE + outgoing_nbytes, | |
1f90a790 | 981 | before_markers); |
ce97a2d7 | 982 | |
1f90a790 RS |
983 | offset_intervals (current_buffer, PT, nchars); |
984 | ||
d5db4077 | 985 | intervals = STRING_INTERVALS (string); |
b16afa45 | 986 | /* Get the intervals for the part of the string we are inserting. */ |
d5db4077 | 987 | if (nbytes < SBYTES (string)) |
1f90a790 | 988 | intervals = copy_intervals (intervals, pos, nchars); |
177c0ea7 | 989 | |
ce97a2d7 | 990 | /* Insert those intervals. */ |
1f90a790 | 991 | graft_intervals_into_buffer (intervals, PT, nchars, |
9391e591 | 992 | current_buffer, inherit); |
ce97a2d7 | 993 | |
b16afa45 | 994 | adjust_point (nchars, outgoing_nbytes); |
8f924df7 KH |
995 | |
996 | CHECK_MARKERS (); | |
997 | } | |
998 | \f | |
999 | /* Insert a sequence of NCHARS chars which occupy NBYTES bytes | |
1000 | starting at GPT_ADDR. */ | |
1001 | ||
1002 | void | |
ae19ba7c | 1003 | insert_from_gap (EMACS_INT nchars, EMACS_INT nbytes) |
8f924df7 | 1004 | { |
4b4deea2 | 1005 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
8f924df7 KH |
1006 | nchars = nbytes; |
1007 | ||
1008 | record_insert (GPT, nchars); | |
1009 | MODIFF++; | |
1010 | ||
1011 | GAP_SIZE -= nbytes; | |
1012 | GPT += nchars; | |
1013 | ZV += nchars; | |
1014 | Z += nchars; | |
1015 | GPT_BYTE += nbytes; | |
1016 | ZV_BYTE += nbytes; | |
1017 | Z_BYTE += nbytes; | |
1018 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ | |
1019 | ||
1020 | if (GPT_BYTE < GPT) | |
1021 | abort (); | |
1022 | ||
c669988b KH |
1023 | adjust_overlays_for_insert (GPT - nchars, nchars); |
1024 | adjust_markers_for_insert (GPT - nchars, GPT_BYTE - nbytes, | |
1025 | GPT, GPT_BYTE, 0); | |
8f924df7 KH |
1026 | |
1027 | if (BUF_INTERVALS (current_buffer) != 0) | |
c669988b KH |
1028 | { |
1029 | offset_intervals (current_buffer, GPT - nchars, nchars); | |
1030 | graft_intervals_into_buffer (NULL_INTERVAL, GPT - nchars, nchars, | |
1031 | current_buffer, 0); | |
1032 | } | |
8f924df7 KH |
1033 | |
1034 | if (GPT - nchars < PT) | |
1035 | adjust_point (nchars, nbytes); | |
1036 | ||
1037 | CHECK_MARKERS (); | |
b45433b3 | 1038 | } |
3be11131 RS |
1039 | \f |
1040 | /* Insert text from BUF, NCHARS characters starting at CHARPOS, into the | |
ef29f213 KH |
1041 | current buffer. If the text in BUF has properties, they are absorbed |
1042 | into the current buffer. | |
1043 | ||
1044 | It does not work to use `insert' for this, because a malloc could happen | |
72af86bd | 1045 | and relocate BUF's text before the copy happens. */ |
ef29f213 KH |
1046 | |
1047 | void | |
ae19ba7c SM |
1048 | insert_from_buffer (struct buffer *buf, |
1049 | EMACS_INT charpos, EMACS_INT nchars, int inherit) | |
ef29f213 | 1050 | { |
ae19ba7c | 1051 | EMACS_INT opoint = PT; |
3be11131 | 1052 | |
62b82678 RS |
1053 | insert_from_buffer_1 (buf, charpos, nchars, inherit); |
1054 | signal_after_change (opoint, 0, PT - opoint); | |
0ef71121 | 1055 | update_compositions (opoint, PT, CHECK_BORDER); |
ef29f213 KH |
1056 | } |
1057 | ||
1058 | static void | |
ae19ba7c SM |
1059 | insert_from_buffer_1 (struct buffer *buf, |
1060 | EMACS_INT from, EMACS_INT nchars, int inherit) | |
ef29f213 | 1061 | { |
ae19ba7c SM |
1062 | EMACS_INT chunk, chunk_expanded; |
1063 | EMACS_INT from_byte = buf_charpos_to_bytepos (buf, from); | |
1064 | EMACS_INT to_byte = buf_charpos_to_bytepos (buf, from + nchars); | |
1065 | EMACS_INT incoming_nbytes = to_byte - from_byte; | |
1066 | EMACS_INT outgoing_nbytes = incoming_nbytes; | |
ce97a2d7 | 1067 | INTERVAL intervals; |
2b083808 RS |
1068 | |
1069 | /* Make OUTGOING_NBYTES describe the text | |
1070 | as it will be inserted in this buffer. */ | |
1071 | ||
4b4deea2 | 1072 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
2b083808 | 1073 | outgoing_nbytes = nchars; |
4b4deea2 | 1074 | else if (NILP (BVAR (buf, enable_multibyte_characters))) |
4468c4f1 | 1075 | { |
ae19ba7c SM |
1076 | EMACS_INT outgoing_before_gap = 0; |
1077 | EMACS_INT outgoing_after_gap = 0; | |
ef29f213 | 1078 | |
4468c4f1 KH |
1079 | if (from < BUF_GPT (buf)) |
1080 | { | |
1081 | chunk = BUF_GPT_BYTE (buf) - from_byte; | |
1082 | if (chunk > incoming_nbytes) | |
1083 | chunk = incoming_nbytes; | |
1084 | outgoing_before_gap | |
1085 | = count_size_as_multibyte (BUF_BYTE_ADDRESS (buf, from_byte), | |
1086 | chunk); | |
1087 | } | |
1088 | else | |
1089 | chunk = 0; | |
1090 | ||
1091 | if (chunk < incoming_nbytes) | |
1092 | outgoing_after_gap | |
177c0ea7 | 1093 | = count_size_as_multibyte (BUF_BYTE_ADDRESS (buf, |
4468c4f1 KH |
1094 | from_byte + chunk), |
1095 | incoming_nbytes - chunk); | |
1096 | ||
1097 | outgoing_nbytes = outgoing_before_gap + outgoing_after_gap; | |
1098 | } | |
177c0ea7 | 1099 | |
35d63725 RS |
1100 | /* Do this before moving and increasing the gap, |
1101 | because the before-change hooks might move the gap | |
1102 | or make it smaller. */ | |
d206af14 | 1103 | prepare_to_modify_buffer (PT, PT, NULL); |
ef29f213 KH |
1104 | |
1105 | if (PT != GPT) | |
3be11131 | 1106 | move_gap_both (PT, PT_BYTE); |
2b083808 RS |
1107 | if (GAP_SIZE < outgoing_nbytes) |
1108 | make_gap (outgoing_nbytes - GAP_SIZE); | |
ef29f213 | 1109 | |
3be11131 | 1110 | if (from < BUF_GPT (buf)) |
ef29f213 | 1111 | { |
3be11131 | 1112 | chunk = BUF_GPT_BYTE (buf) - from_byte; |
2b083808 RS |
1113 | if (chunk > incoming_nbytes) |
1114 | chunk = incoming_nbytes; | |
4468c4f1 KH |
1115 | /* Record number of output bytes, so we know where |
1116 | to put the output from the second copy_text. */ | |
1117 | chunk_expanded | |
1118 | = copy_text (BUF_BYTE_ADDRESS (buf, from_byte), | |
1119 | GPT_ADDR, chunk, | |
4b4deea2 TT |
1120 | ! NILP (BVAR (buf, enable_multibyte_characters)), |
1121 | ! NILP (BVAR (current_buffer, enable_multibyte_characters))); | |
ef29f213 KH |
1122 | } |
1123 | else | |
4468c4f1 KH |
1124 | chunk_expanded = chunk = 0; |
1125 | ||
2b083808 RS |
1126 | if (chunk < incoming_nbytes) |
1127 | copy_text (BUF_BYTE_ADDRESS (buf, from_byte + chunk), | |
4468c4f1 | 1128 | GPT_ADDR + chunk_expanded, incoming_nbytes - chunk, |
4b4deea2 TT |
1129 | ! NILP (BVAR (buf, enable_multibyte_characters)), |
1130 | ! NILP (BVAR (current_buffer, enable_multibyte_characters))); | |
ef29f213 | 1131 | |
b16afa45 | 1132 | #ifdef BYTE_COMBINING_DEBUG |
432f78d2 RS |
1133 | /* We have copied text into the gap, but we have not altered |
1134 | PT or PT_BYTE yet. So we can pass PT and PT_BYTE | |
1135 | to these functions and get the same results as we would | |
1f90a790 | 1136 | have got earlier on. Meanwhile, GPT_ADDR does point to |
432f78d2 | 1137 | the text that has been stored by copy_text. */ |
b16afa45 KH |
1138 | if (count_combining_before (GPT_ADDR, outgoing_nbytes, PT, PT_BYTE) |
1139 | || count_combining_after (GPT_ADDR, outgoing_nbytes, PT, PT_BYTE)) | |
1140 | abort (); | |
1141 | #endif | |
432f78d2 | 1142 | |
b16afa45 | 1143 | record_insert (PT, nchars); |
432f78d2 | 1144 | MODIFF++; |
3e145152 | 1145 | CHARS_MODIFF = MODIFF; |
432f78d2 | 1146 | |
2b083808 | 1147 | GAP_SIZE -= outgoing_nbytes; |
1f90a790 RS |
1148 | GPT += nchars; |
1149 | ZV += nchars; | |
1150 | Z += nchars; | |
2b083808 RS |
1151 | GPT_BYTE += outgoing_nbytes; |
1152 | ZV_BYTE += outgoing_nbytes; | |
1153 | Z_BYTE += outgoing_nbytes; | |
469ff680 | 1154 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
1f90a790 | 1155 | |
1f90a790 RS |
1156 | if (GPT_BYTE < GPT) |
1157 | abort (); | |
1158 | ||
9dde4e0c KS |
1159 | /* The insert may have been in the unchanged region, so check again. */ |
1160 | if (Z - GPT < END_UNCHANGED) | |
1161 | END_UNCHANGED = Z - GPT; | |
1162 | ||
1f90a790 RS |
1163 | adjust_overlays_for_insert (PT, nchars); |
1164 | adjust_markers_for_insert (PT, PT_BYTE, PT + nchars, | |
432f78d2 | 1165 | PT_BYTE + outgoing_nbytes, |
b16afa45 | 1166 | 0); |
ce97a2d7 | 1167 | |
1f90a790 RS |
1168 | if (BUF_INTERVALS (current_buffer) != 0) |
1169 | offset_intervals (current_buffer, PT, nchars); | |
ce97a2d7 | 1170 | |
b16afa45 | 1171 | /* Get the intervals for the part of the string we are inserting. */ |
ce97a2d7 | 1172 | intervals = BUF_INTERVALS (buf); |
f1a6b216 | 1173 | if (nchars < BUF_Z (buf) - BUF_BEG (buf)) |
06d8227a GM |
1174 | { |
1175 | if (buf == current_buffer && PT <= from) | |
1176 | from += nchars; | |
1177 | intervals = copy_intervals (intervals, from, nchars); | |
1178 | } | |
177c0ea7 | 1179 | |
ce97a2d7 | 1180 | /* Insert those intervals. */ |
1f90a790 | 1181 | graft_intervals_into_buffer (intervals, PT, nchars, current_buffer, inherit); |
ce97a2d7 | 1182 | |
b16afa45 | 1183 | adjust_point (nchars, outgoing_nbytes); |
b45433b3 JB |
1184 | } |
1185 | \f | |
652838b5 KH |
1186 | /* Record undo information and adjust markers and position keepers for |
1187 | a replacement of a text PREV_TEXT at FROM to a new text of LEN | |
1188 | chars (LEN_BYTE bytes) which resides in the gap just after | |
1189 | GPT_ADDR. | |
1190 | ||
1191 | PREV_TEXT nil means the new text was just inserted. */ | |
2d9eea44 | 1192 | |
77382fcc | 1193 | static void |
ae19ba7c SM |
1194 | adjust_after_replace (EMACS_INT from, EMACS_INT from_byte, |
1195 | Lisp_Object prev_text, EMACS_INT len, EMACS_INT len_byte) | |
1e9c7b7d | 1196 | { |
ae19ba7c | 1197 | EMACS_INT nchars_del = 0, nbytes_del = 0; |
61415a25 | 1198 | |
b16afa45 KH |
1199 | #ifdef BYTE_COMBINING_DEBUG |
1200 | if (count_combining_before (GPT_ADDR, len_byte, from, from_byte) | |
1201 | || count_combining_after (GPT_ADDR, len_byte, from, from_byte)) | |
1202 | abort (); | |
1203 | #endif | |
1204 | ||
828f1ed3 KH |
1205 | if (STRINGP (prev_text)) |
1206 | { | |
d5db4077 KR |
1207 | nchars_del = SCHARS (prev_text); |
1208 | nbytes_del = SBYTES (prev_text); | |
828f1ed3 KH |
1209 | } |
1210 | ||
61415a25 KH |
1211 | /* Update various buffer positions for the new text. */ |
1212 | GAP_SIZE -= len_byte; | |
1213 | ZV += len; Z+= len; | |
1214 | ZV_BYTE += len_byte; Z_BYTE += len_byte; | |
1215 | GPT += len; GPT_BYTE += len_byte; | |
1216 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ | |
1217 | ||
adee4f91 KH |
1218 | if (nchars_del > 0) |
1219 | adjust_markers_for_replace (from, from_byte, nchars_del, nbytes_del, | |
1220 | len, len_byte); | |
1221 | else | |
1222 | adjust_markers_for_insert (from, from_byte, | |
1223 | from + len, from_byte + len_byte, 0); | |
b16afa45 | 1224 | |
4b4deea2 | 1225 | if (! EQ (BVAR (current_buffer, undo_list), Qt)) |
828f1ed3 | 1226 | { |
828f1ed3 | 1227 | if (nchars_del > 0) |
b16afa45 KH |
1228 | record_delete (from, prev_text); |
1229 | record_insert (from, len); | |
828f1ed3 | 1230 | } |
652838b5 KH |
1231 | |
1232 | if (len > nchars_del) | |
1233 | adjust_overlays_for_insert (from, len - nchars_del); | |
1234 | else if (len < nchars_del) | |
1235 | adjust_overlays_for_delete (from, nchars_del - len); | |
61415a25 | 1236 | if (BUF_INTERVALS (current_buffer) != 0) |
4a7cf15f KH |
1237 | { |
1238 | offset_intervals (current_buffer, from, len - nchars_del); | |
4a7cf15f | 1239 | } |
61415a25 | 1240 | |
b16afa45 KH |
1241 | if (from < PT) |
1242 | adjust_point (len - nchars_del, len_byte - nbytes_del); | |
61415a25 | 1243 | |
9f3ede3c | 1244 | /* As byte combining will decrease Z, we must check this again. */ |
a50df55b GM |
1245 | if (Z - GPT < END_UNCHANGED) |
1246 | END_UNCHANGED = Z - GPT; | |
9f3ede3c | 1247 | |
60ea6052 RS |
1248 | CHECK_MARKERS (); |
1249 | ||
1e9c7b7d | 1250 | if (len == 0) |
b58e3ca1 RS |
1251 | evaporate_overlays (from); |
1252 | MODIFF++; | |
3e145152 | 1253 | CHARS_MODIFF = MODIFF; |
b58e3ca1 RS |
1254 | } |
1255 | ||
652838b5 KH |
1256 | /* Record undo information, adjust markers and position keepers for an |
1257 | insertion of a text from FROM (FROM_BYTE) to TO (TO_BYTE). The | |
1258 | text already exists in the current buffer but character length (TO | |
1259 | - FROM) may be incorrect, the correct length is NEWLEN. */ | |
1260 | ||
1261 | void | |
ae19ba7c SM |
1262 | adjust_after_insert (EMACS_INT from, EMACS_INT from_byte, |
1263 | EMACS_INT to, EMACS_INT to_byte, EMACS_INT newlen) | |
652838b5 | 1264 | { |
ae19ba7c | 1265 | EMACS_INT len = to - from, len_byte = to_byte - from_byte; |
652838b5 KH |
1266 | |
1267 | if (GPT != to) | |
1268 | move_gap_both (to, to_byte); | |
1269 | GAP_SIZE += len_byte; | |
1270 | GPT -= len; GPT_BYTE -= len_byte; | |
1271 | ZV -= len; ZV_BYTE -= len_byte; | |
1272 | Z -= len; Z_BYTE -= len_byte; | |
1273 | adjust_after_replace (from, from_byte, Qnil, newlen, len_byte); | |
1274 | } | |
085db7de | 1275 | \f |
3be11131 | 1276 | /* Replace the text from character positions FROM to TO with NEW, |
c5ca4d3a RS |
1277 | If PREPARE is nonzero, call prepare_to_modify_buffer. |
1278 | If INHERIT, the newly inserted text should inherit text properties | |
1279 | from the surrounding non-deleted text. */ | |
1280 | ||
1281 | /* Note that this does not yet handle markers quite right. | |
1282 | Also it needs to record a single undo-entry that does a replacement | |
1283 | rather than a separate delete and insert. | |
60aa777a RS |
1284 | That way, undo will also handle markers properly. |
1285 | ||
1286 | But if MARKERS is 0, don't relocate markers. */ | |
c5ca4d3a RS |
1287 | |
1288 | void | |
ae19ba7c SM |
1289 | replace_range (EMACS_INT from, EMACS_INT to, Lisp_Object new, |
1290 | int prepare, int inherit, int markers) | |
c5ca4d3a | 1291 | { |
ae19ba7c SM |
1292 | EMACS_INT inschars = SCHARS (new); |
1293 | EMACS_INT insbytes = SBYTES (new); | |
1294 | EMACS_INT from_byte, to_byte; | |
1295 | EMACS_INT nbytes_del, nchars_del; | |
c5ca4d3a | 1296 | struct gcpro gcpro1; |
ce97a2d7 | 1297 | INTERVAL intervals; |
ae19ba7c | 1298 | EMACS_INT outgoing_insbytes = insbytes; |
23b20a70 | 1299 | Lisp_Object deletion; |
c5ca4d3a | 1300 | |
60ea6052 RS |
1301 | CHECK_MARKERS (); |
1302 | ||
c5ca4d3a | 1303 | GCPRO1 (new); |
6bbd7a29 | 1304 | deletion = Qnil; |
c5ca4d3a RS |
1305 | |
1306 | if (prepare) | |
1307 | { | |
ae19ba7c | 1308 | EMACS_INT range_length = to - from; |
c5ca4d3a RS |
1309 | prepare_to_modify_buffer (from, to, &from); |
1310 | to = from + range_length; | |
1311 | } | |
1312 | ||
3be11131 RS |
1313 | UNGCPRO; |
1314 | ||
b50a28de | 1315 | /* Make args be valid. */ |
c5ca4d3a RS |
1316 | if (from < BEGV) |
1317 | from = BEGV; | |
1318 | if (to > ZV) | |
1319 | to = ZV; | |
1320 | ||
3be11131 RS |
1321 | from_byte = CHAR_TO_BYTE (from); |
1322 | to_byte = CHAR_TO_BYTE (to); | |
c5ca4d3a | 1323 | |
3be11131 RS |
1324 | nchars_del = to - from; |
1325 | nbytes_del = to_byte - from_byte; | |
1326 | ||
1327 | if (nbytes_del <= 0 && insbytes == 0) | |
1328 | return; | |
c5ca4d3a | 1329 | |
1f90a790 RS |
1330 | /* Make OUTGOING_INSBYTES describe the text |
1331 | as it will be inserted in this buffer. */ | |
1332 | ||
4b4deea2 | 1333 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
1f90a790 | 1334 | outgoing_insbytes = inschars; |
2a1d8be0 | 1335 | else if (! STRING_MULTIBYTE (new)) |
1f90a790 | 1336 | outgoing_insbytes |
d5db4077 | 1337 | = count_size_as_multibyte (SDATA (new), insbytes); |
1f90a790 | 1338 | |
c5ca4d3a RS |
1339 | GCPRO1 (new); |
1340 | ||
1341 | /* Make sure the gap is somewhere in or next to what we are deleting. */ | |
1342 | if (from > GPT) | |
3be11131 | 1343 | gap_right (from, from_byte); |
c5ca4d3a | 1344 | if (to < GPT) |
3be11131 | 1345 | gap_left (to, to_byte, 0); |
c5ca4d3a | 1346 | |
039af53a KH |
1347 | /* Even if we don't record for undo, we must keep the original text |
1348 | because we may have to recover it because of inappropriate byte | |
1349 | combining. */ | |
4b4deea2 | 1350 | if (! EQ (BVAR (current_buffer, undo_list), Qt)) |
b16afa45 | 1351 | deletion = make_buffer_string_both (from, from_byte, to, to_byte, 1); |
c5ca4d3a | 1352 | |
3be11131 RS |
1353 | GAP_SIZE += nbytes_del; |
1354 | ZV -= nchars_del; | |
1355 | Z -= nchars_del; | |
1356 | ZV_BYTE -= nbytes_del; | |
1357 | Z_BYTE -= nbytes_del; | |
c5ca4d3a | 1358 | GPT = from; |
3be11131 | 1359 | GPT_BYTE = from_byte; |
017e09ac | 1360 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
c5ca4d3a | 1361 | |
3be11131 RS |
1362 | if (GPT_BYTE < GPT) |
1363 | abort (); | |
1364 | ||
a50df55b GM |
1365 | if (GPT - BEG < BEG_UNCHANGED) |
1366 | BEG_UNCHANGED = GPT - BEG; | |
1367 | if (Z - GPT < END_UNCHANGED) | |
1368 | END_UNCHANGED = Z - GPT; | |
c5ca4d3a | 1369 | |
599a9e4f PE |
1370 | if (GAP_SIZE < outgoing_insbytes) |
1371 | make_gap (outgoing_insbytes - GAP_SIZE); | |
c5ca4d3a | 1372 | |
1f90a790 RS |
1373 | /* Copy the string text into the buffer, perhaps converting |
1374 | between single-byte and multibyte. */ | |
d5db4077 | 1375 | copy_text (SDATA (new), GPT_ADDR, insbytes, |
2a1d8be0 | 1376 | STRING_MULTIBYTE (new), |
4b4deea2 | 1377 | ! NILP (BVAR (current_buffer, enable_multibyte_characters))); |
1f90a790 | 1378 | |
b16afa45 | 1379 | #ifdef BYTE_COMBINING_DEBUG |
255c7dae RS |
1380 | /* We have copied text into the gap, but we have not marked |
1381 | it as part of the buffer. So we can use the old FROM and FROM_BYTE | |
1382 | here, for both the previous text and the following text. | |
1383 | Meanwhile, GPT_ADDR does point to | |
432f78d2 | 1384 | the text that has been stored by copy_text. */ |
b16afa45 KH |
1385 | if (count_combining_before (GPT_ADDR, outgoing_insbytes, from, from_byte) |
1386 | || count_combining_after (GPT_ADDR, outgoing_insbytes, from, from_byte)) | |
1387 | abort (); | |
1388 | #endif | |
432f78d2 | 1389 | |
4b4deea2 | 1390 | if (! EQ (BVAR (current_buffer, undo_list), Qt)) |
23b20a70 | 1391 | { |
bec1aca2 RS |
1392 | /* Record the insertion first, so that when we undo, |
1393 | the deletion will be undone first. Thus, undo | |
1394 | will insert before deleting, and thus will keep | |
1395 | the markers before and after this text separate. */ | |
1396 | record_insert (from + SCHARS (deletion), inschars); | |
b16afa45 | 1397 | record_delete (from, deletion); |
23b20a70 | 1398 | } |
c5ca4d3a | 1399 | |
1f90a790 RS |
1400 | GAP_SIZE -= outgoing_insbytes; |
1401 | GPT += inschars; | |
1402 | ZV += inschars; | |
1403 | Z += inschars; | |
1404 | GPT_BYTE += outgoing_insbytes; | |
1405 | ZV_BYTE += outgoing_insbytes; | |
1406 | Z_BYTE += outgoing_insbytes; | |
c5ca4d3a RS |
1407 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
1408 | ||
3be11131 RS |
1409 | if (GPT_BYTE < GPT) |
1410 | abort (); | |
1411 | ||
c5ca4d3a RS |
1412 | /* Adjust the overlay center as needed. This must be done after |
1413 | adjusting the markers that bound the overlays. */ | |
3be11131 | 1414 | adjust_overlays_for_delete (from, nchars_del); |
1f90a790 | 1415 | adjust_overlays_for_insert (from, inschars); |
048a0fbb RS |
1416 | |
1417 | /* Adjust markers for the deletion and the insertion. */ | |
60aa777a | 1418 | if (markers) |
048a0fbb RS |
1419 | adjust_markers_for_replace (from, from_byte, nchars_del, nbytes_del, |
1420 | inschars, outgoing_insbytes); | |
c5ca4d3a | 1421 | |
255c7dae | 1422 | offset_intervals (current_buffer, from, inschars - nchars_del); |
ce97a2d7 RS |
1423 | |
1424 | /* Get the intervals for the part of the string we are inserting-- | |
1425 | not including the combined-before bytes. */ | |
d5db4077 | 1426 | intervals = STRING_INTERVALS (new); |
ce97a2d7 | 1427 | /* Insert those intervals. */ |
1f90a790 | 1428 | graft_intervals_into_buffer (intervals, from, inschars, |
ce97a2d7 | 1429 | current_buffer, inherit); |
c5ca4d3a | 1430 | |
1f90a790 RS |
1431 | /* Relocate point as if it were a marker. */ |
1432 | if (from < PT) | |
8bedbe9d | 1433 | adjust_point ((from + inschars - (PT < to ? PT : to)), |
1f90a790 | 1434 | (from_byte + outgoing_insbytes |
8bedbe9d | 1435 | - (PT_BYTE < to_byte ? PT_BYTE : to_byte))); |
c5ca4d3a | 1436 | |
1f90a790 RS |
1437 | if (outgoing_insbytes == 0) |
1438 | evaporate_overlays (from); | |
93b882e8 | 1439 | |
60ea6052 RS |
1440 | CHECK_MARKERS (); |
1441 | ||
c5ca4d3a | 1442 | MODIFF++; |
3e145152 | 1443 | CHARS_MODIFF = MODIFF; |
c5ca4d3a RS |
1444 | UNGCPRO; |
1445 | ||
255c7dae | 1446 | signal_after_change (from, nchars_del, GPT - from); |
0ef71121 | 1447 | update_compositions (from, GPT, CHECK_BORDER); |
c5ca4d3a RS |
1448 | } |
1449 | \f | |
085db7de RS |
1450 | /* Replace the text from character positions FROM to TO with |
1451 | the text in INS of length INSCHARS. | |
1452 | Keep the text properties that applied to the old characters | |
1453 | (extending them to all the new chars if there are more new chars). | |
1454 | ||
1455 | Note that this does not yet handle markers quite right. | |
1456 | ||
1457 | If MARKERS is nonzero, relocate markers. | |
1458 | ||
1459 | Unlike most functions at this level, never call | |
1460 | prepare_to_modify_buffer and never call signal_after_change. */ | |
1461 | ||
1462 | void | |
ae19ba7c SM |
1463 | replace_range_2 (EMACS_INT from, EMACS_INT from_byte, |
1464 | EMACS_INT to, EMACS_INT to_byte, | |
a8fe7202 | 1465 | const char *ins, EMACS_INT inschars, EMACS_INT insbytes, |
ae19ba7c | 1466 | int markers) |
085db7de | 1467 | { |
ae19ba7c | 1468 | EMACS_INT nbytes_del, nchars_del; |
085db7de RS |
1469 | |
1470 | CHECK_MARKERS (); | |
1471 | ||
1472 | nchars_del = to - from; | |
1473 | nbytes_del = to_byte - from_byte; | |
1474 | ||
1475 | if (nbytes_del <= 0 && insbytes == 0) | |
1476 | return; | |
1477 | ||
085db7de RS |
1478 | /* Make sure the gap is somewhere in or next to what we are deleting. */ |
1479 | if (from > GPT) | |
1480 | gap_right (from, from_byte); | |
1481 | if (to < GPT) | |
1482 | gap_left (to, to_byte, 0); | |
1483 | ||
1484 | GAP_SIZE += nbytes_del; | |
1485 | ZV -= nchars_del; | |
1486 | Z -= nchars_del; | |
1487 | ZV_BYTE -= nbytes_del; | |
1488 | Z_BYTE -= nbytes_del; | |
1489 | GPT = from; | |
1490 | GPT_BYTE = from_byte; | |
1491 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ | |
1492 | ||
1493 | if (GPT_BYTE < GPT) | |
1494 | abort (); | |
1495 | ||
1496 | if (GPT - BEG < BEG_UNCHANGED) | |
1497 | BEG_UNCHANGED = GPT - BEG; | |
1498 | if (Z - GPT < END_UNCHANGED) | |
1499 | END_UNCHANGED = Z - GPT; | |
1500 | ||
1501 | if (GAP_SIZE < insbytes) | |
1502 | make_gap (insbytes - GAP_SIZE); | |
1503 | ||
1504 | /* Copy the replacement text into the buffer. */ | |
72af86bd | 1505 | memcpy (GPT_ADDR, ins, insbytes); |
085db7de RS |
1506 | |
1507 | #ifdef BYTE_COMBINING_DEBUG | |
1508 | /* We have copied text into the gap, but we have not marked | |
1509 | it as part of the buffer. So we can use the old FROM and FROM_BYTE | |
1510 | here, for both the previous text and the following text. | |
1511 | Meanwhile, GPT_ADDR does point to | |
1512 | the text that has been stored by copy_text. */ | |
1513 | if (count_combining_before (GPT_ADDR, insbytes, from, from_byte) | |
1514 | || count_combining_after (GPT_ADDR, insbytes, from, from_byte)) | |
1515 | abort (); | |
1516 | #endif | |
1517 | ||
1518 | GAP_SIZE -= insbytes; | |
1519 | GPT += inschars; | |
1520 | ZV += inschars; | |
1521 | Z += inschars; | |
1522 | GPT_BYTE += insbytes; | |
1523 | ZV_BYTE += insbytes; | |
1524 | Z_BYTE += insbytes; | |
1525 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ | |
1526 | ||
1527 | if (GPT_BYTE < GPT) | |
1528 | abort (); | |
1529 | ||
1530 | /* Adjust the overlay center as needed. This must be done after | |
1531 | adjusting the markers that bound the overlays. */ | |
1532 | if (nchars_del != inschars) | |
1533 | { | |
1534 | adjust_overlays_for_insert (from, inschars); | |
1535 | adjust_overlays_for_delete (from + inschars, nchars_del); | |
1536 | } | |
1537 | ||
1538 | /* Adjust markers for the deletion and the insertion. */ | |
1539 | if (markers | |
7077904e | 1540 | && ! (nchars_del == 1 && inschars == 1 && nbytes_del == insbytes)) |
085db7de RS |
1541 | adjust_markers_for_replace (from, from_byte, nchars_del, nbytes_del, |
1542 | inschars, insbytes); | |
1543 | ||
1544 | offset_intervals (current_buffer, from, inschars - nchars_del); | |
1545 | ||
1546 | /* Relocate point as if it were a marker. */ | |
7077904e KH |
1547 | if (from < PT && (nchars_del != inschars || nbytes_del != insbytes)) |
1548 | { | |
1549 | if (PT < to) | |
1550 | /* PT was within the deleted text. Move it to FROM. */ | |
1551 | adjust_point (from - PT, from_byte - PT_BYTE); | |
1552 | else | |
1553 | adjust_point (inschars - nchars_del, insbytes - nbytes_del); | |
1554 | } | |
085db7de RS |
1555 | |
1556 | if (insbytes == 0) | |
1557 | evaporate_overlays (from); | |
1558 | ||
1559 | CHECK_MARKERS (); | |
1560 | ||
1561 | MODIFF++; | |
3e145152 | 1562 | CHARS_MODIFF = MODIFF; |
085db7de RS |
1563 | } |
1564 | \f | |
b45433b3 | 1565 | /* Delete characters in current buffer |
3be11131 RS |
1566 | from FROM up to (but not including) TO. |
1567 | If TO comes before FROM, we delete nothing. */ | |
b45433b3 | 1568 | |
c660b094 | 1569 | void |
ae19ba7c | 1570 | del_range (EMACS_INT from, EMACS_INT to) |
47c64747 | 1571 | { |
7dae4502 | 1572 | del_range_1 (from, to, 1, 0); |
47c64747 RS |
1573 | } |
1574 | ||
7dae4502 SM |
1575 | /* Like del_range; PREPARE says whether to call prepare_to_modify_buffer. |
1576 | RET_STRING says to return the deleted text. */ | |
47c64747 | 1577 | |
7dae4502 | 1578 | Lisp_Object |
ae19ba7c | 1579 | del_range_1 (EMACS_INT from, EMACS_INT to, int prepare, int ret_string) |
b45433b3 | 1580 | { |
ae19ba7c | 1581 | EMACS_INT from_byte, to_byte; |
7dae4502 SM |
1582 | Lisp_Object deletion; |
1583 | struct gcpro gcpro1; | |
3be11131 RS |
1584 | |
1585 | /* Make args be valid */ | |
1586 | if (from < BEGV) | |
1587 | from = BEGV; | |
1588 | if (to > ZV) | |
1589 | to = ZV; | |
1590 | ||
1591 | if (to <= from) | |
7dae4502 | 1592 | return Qnil; |
3be11131 RS |
1593 | |
1594 | if (prepare) | |
1595 | { | |
ae19ba7c | 1596 | EMACS_INT range_length = to - from; |
3be11131 | 1597 | prepare_to_modify_buffer (from, to, &from); |
0a411995 | 1598 | to = min (ZV, from + range_length); |
3be11131 RS |
1599 | } |
1600 | ||
1601 | from_byte = CHAR_TO_BYTE (from); | |
1602 | to_byte = CHAR_TO_BYTE (to); | |
1603 | ||
7dae4502 | 1604 | deletion = del_range_2 (from, from_byte, to, to_byte, ret_string); |
5e617bc2 | 1605 | GCPRO1 (deletion); |
9c36993a | 1606 | signal_after_change (from, to - from, 0); |
233cc02d | 1607 | update_compositions (from, from, CHECK_HEAD); |
7dae4502 SM |
1608 | UNGCPRO; |
1609 | return deletion; | |
3be11131 RS |
1610 | } |
1611 | ||
1612 | /* Like del_range_1 but args are byte positions, not char positions. */ | |
1613 | ||
1614 | void | |
ae19ba7c | 1615 | del_range_byte (EMACS_INT from_byte, EMACS_INT to_byte, int prepare) |
3be11131 | 1616 | { |
ae19ba7c | 1617 | EMACS_INT from, to; |
3be11131 RS |
1618 | |
1619 | /* Make args be valid */ | |
1620 | if (from_byte < BEGV_BYTE) | |
1621 | from_byte = BEGV_BYTE; | |
1622 | if (to_byte > ZV_BYTE) | |
1623 | to_byte = ZV_BYTE; | |
1624 | ||
1625 | if (to_byte <= from_byte) | |
1626 | return; | |
1627 | ||
1628 | from = BYTE_TO_CHAR (from_byte); | |
1629 | to = BYTE_TO_CHAR (to_byte); | |
b45433b3 | 1630 | |
d206af14 RS |
1631 | if (prepare) |
1632 | { | |
ae19ba7c SM |
1633 | EMACS_INT old_from = from, old_to = Z - to; |
1634 | EMACS_INT range_length = to - from; | |
d206af14 RS |
1635 | prepare_to_modify_buffer (from, to, &from); |
1636 | to = from + range_length; | |
3be11131 RS |
1637 | |
1638 | if (old_from != from) | |
1639 | from_byte = CHAR_TO_BYTE (from); | |
0a411995 GM |
1640 | if (to > ZV) |
1641 | { | |
1642 | to = ZV; | |
1643 | to_byte = ZV_BYTE; | |
1644 | } | |
1645 | else if (old_to == Z - to) | |
3be11131 | 1646 | to_byte = CHAR_TO_BYTE (to); |
d206af14 RS |
1647 | } |
1648 | ||
7dae4502 | 1649 | del_range_2 (from, from_byte, to, to_byte, 0); |
9c36993a | 1650 | signal_after_change (from, to - from, 0); |
0ef71121 | 1651 | update_compositions (from, from, CHECK_HEAD); |
3be11131 RS |
1652 | } |
1653 | ||
1654 | /* Like del_range_1, but positions are specified both as charpos | |
1655 | and bytepos. */ | |
1656 | ||
1657 | void | |
ae19ba7c SM |
1658 | del_range_both (EMACS_INT from, EMACS_INT from_byte, |
1659 | EMACS_INT to, EMACS_INT to_byte, int prepare) | |
3be11131 | 1660 | { |
b45433b3 | 1661 | /* Make args be valid */ |
3be11131 RS |
1662 | if (from_byte < BEGV_BYTE) |
1663 | from_byte = BEGV_BYTE; | |
1664 | if (to_byte > ZV_BYTE) | |
1665 | to_byte = ZV_BYTE; | |
1666 | ||
1667 | if (to_byte <= from_byte) | |
1668 | return; | |
1669 | ||
b45433b3 JB |
1670 | if (from < BEGV) |
1671 | from = BEGV; | |
1672 | if (to > ZV) | |
1673 | to = ZV; | |
1674 | ||
3be11131 RS |
1675 | if (prepare) |
1676 | { | |
ae19ba7c SM |
1677 | EMACS_INT old_from = from, old_to = Z - to; |
1678 | EMACS_INT range_length = to - from; | |
3be11131 RS |
1679 | prepare_to_modify_buffer (from, to, &from); |
1680 | to = from + range_length; | |
1681 | ||
1682 | if (old_from != from) | |
1683 | from_byte = CHAR_TO_BYTE (from); | |
0a411995 GM |
1684 | if (to > ZV) |
1685 | { | |
1686 | to = ZV; | |
1687 | to_byte = ZV_BYTE; | |
1688 | } | |
1689 | else if (old_to == Z - to) | |
3be11131 RS |
1690 | to_byte = CHAR_TO_BYTE (to); |
1691 | } | |
1692 | ||
7dae4502 | 1693 | del_range_2 (from, from_byte, to, to_byte, 0); |
9c36993a | 1694 | signal_after_change (from, to - from, 0); |
0ef71121 | 1695 | update_compositions (from, from, CHECK_HEAD); |
3be11131 RS |
1696 | } |
1697 | ||
1698 | /* Delete a range of text, specified both as character positions | |
1699 | and byte positions. FROM and TO are character positions, | |
7dae4502 SM |
1700 | while FROM_BYTE and TO_BYTE are byte positions. |
1701 | If RET_STRING is true, the deleted area is returned as a string. */ | |
3be11131 | 1702 | |
7dae4502 | 1703 | Lisp_Object |
ae19ba7c SM |
1704 | del_range_2 (EMACS_INT from, EMACS_INT from_byte, |
1705 | EMACS_INT to, EMACS_INT to_byte, int ret_string) | |
3be11131 | 1706 | { |
ae19ba7c | 1707 | register EMACS_INT nbytes_del, nchars_del; |
628cea90 | 1708 | Lisp_Object deletion; |
3be11131 | 1709 | |
60ea6052 RS |
1710 | CHECK_MARKERS (); |
1711 | ||
3be11131 RS |
1712 | nchars_del = to - from; |
1713 | nbytes_del = to_byte - from_byte; | |
b45433b3 JB |
1714 | |
1715 | /* Make sure the gap is somewhere in or next to what we are deleting. */ | |
1716 | if (from > GPT) | |
3be11131 | 1717 | gap_right (from, from_byte); |
b45433b3 | 1718 | if (to < GPT) |
3be11131 | 1719 | gap_left (to, to_byte, 0); |
b45433b3 | 1720 | |
b16afa45 KH |
1721 | #ifdef BYTE_COMBINING_DEBUG |
1722 | if (count_combining_before (BUF_BYTE_ADDRESS (current_buffer, to_byte), | |
1723 | Z_BYTE - to_byte, from, from_byte)) | |
1724 | abort (); | |
1725 | #endif | |
628cea90 | 1726 | |
4b4deea2 | 1727 | if (ret_string || ! EQ (BVAR (current_buffer, undo_list), Qt)) |
b16afa45 | 1728 | deletion = make_buffer_string_both (from, from_byte, to, to_byte, 1); |
7dae4502 SM |
1729 | else |
1730 | deletion = Qnil; | |
1731 | ||
8948d317 RS |
1732 | /* Relocate all markers pointing into the new, larger gap |
1733 | to point at the end of the text before the gap. | |
3be11131 RS |
1734 | Do this before recording the deletion, |
1735 | so that undo handles this after reinserting the text. */ | |
1736 | adjust_markers_for_delete (from, from_byte, to, to_byte); | |
b16afa45 | 1737 | |
4b4deea2 | 1738 | if (! EQ (BVAR (current_buffer, undo_list), Qt)) |
b16afa45 | 1739 | record_delete (from, deletion); |
be09561e | 1740 | MODIFF++; |
3e145152 | 1741 | CHARS_MODIFF = MODIFF; |
be09561e | 1742 | |
b45433b3 | 1743 | /* Relocate point as if it were a marker. */ |
2bcaed71 | 1744 | if (from < PT) |
3be11131 RS |
1745 | adjust_point (from - (PT < to ? PT : to), |
1746 | from_byte - (PT_BYTE < to_byte ? PT_BYTE : to_byte)); | |
b45433b3 | 1747 | |
3be11131 | 1748 | offset_intervals (current_buffer, from, - nchars_del); |
16032db6 | 1749 | |
adde4858 | 1750 | /* Adjust the overlay center as needed. This must be done after |
a7f38d28 | 1751 | adjusting the markers that bound the overlays. */ |
e3a87305 | 1752 | adjust_overlays_for_delete (from, nchars_del); |
adde4858 | 1753 | |
3be11131 RS |
1754 | GAP_SIZE += nbytes_del; |
1755 | ZV_BYTE -= nbytes_del; | |
1756 | Z_BYTE -= nbytes_del; | |
1757 | ZV -= nchars_del; | |
1758 | Z -= nchars_del; | |
b45433b3 | 1759 | GPT = from; |
3be11131 | 1760 | GPT_BYTE = from_byte; |
b3b58c01 AS |
1761 | if (GAP_SIZE > 0 && !current_buffer->text->inhibit_shrinking) |
1762 | /* Put an anchor, unless called from decode_coding_object which | |
1763 | needs to access the previous gap contents. */ | |
1764 | *(GPT_ADDR) = 0; | |
e3a87305 | 1765 | |
3be11131 RS |
1766 | if (GPT_BYTE < GPT) |
1767 | abort (); | |
1768 | ||
a50df55b GM |
1769 | if (GPT - BEG < BEG_UNCHANGED) |
1770 | BEG_UNCHANGED = GPT - BEG; | |
1771 | if (Z - GPT < END_UNCHANGED) | |
1772 | END_UNCHANGED = Z - GPT; | |
b45433b3 | 1773 | |
60ea6052 RS |
1774 | CHECK_MARKERS (); |
1775 | ||
d386034e | 1776 | evaporate_overlays (from); |
7dae4502 SM |
1777 | |
1778 | return deletion; | |
b45433b3 JB |
1779 | } |
1780 | \f | |
3be11131 RS |
1781 | /* Call this if you're about to change the region of BUFFER from |
1782 | character positions START to END. This checks the read-only | |
1783 | properties of the region, calls the necessary modification hooks, | |
1784 | and warns the next redisplay that it should pay attention to that | |
3e145152 CY |
1785 | area. |
1786 | ||
1787 | If PRESERVE_CHARS_MODIFF is non-zero, do not update CHARS_MODIFF. | |
1788 | Otherwise set CHARS_MODIFF to the new value of MODIFF. */ | |
3be11131 | 1789 | |
c660b094 | 1790 | void |
ae19ba7c SM |
1791 | modify_region (struct buffer *buffer, EMACS_INT start, EMACS_INT end, |
1792 | int preserve_chars_modiff) | |
b45433b3 | 1793 | { |
04a759c8 JB |
1794 | struct buffer *old_buffer = current_buffer; |
1795 | ||
1796 | if (buffer != old_buffer) | |
1797 | set_buffer_internal (buffer); | |
1798 | ||
d206af14 | 1799 | prepare_to_modify_buffer (start, end, NULL); |
b45433b3 | 1800 | |
a50df55b | 1801 | BUF_COMPUTE_UNCHANGED (buffer, start - 1, end); |
83010cd6 | 1802 | |
9fbf87cd | 1803 | if (MODIFF <= SAVE_MODIFF) |
83010cd6 | 1804 | record_first_change (); |
b45433b3 | 1805 | MODIFF++; |
3e145152 CY |
1806 | if (! preserve_chars_modiff) |
1807 | CHARS_MODIFF = MODIFF; | |
04a759c8 | 1808 | |
4b4deea2 | 1809 | BVAR (buffer, point_before_scroll) = Qnil; |
069cdc4f | 1810 | |
04a759c8 JB |
1811 | if (buffer != old_buffer) |
1812 | set_buffer_internal (old_buffer); | |
b45433b3 | 1813 | } |
d206af14 | 1814 | \f |
3be11131 RS |
1815 | /* Check that it is okay to modify the buffer between START and END, |
1816 | which are char positions. | |
1817 | ||
679194a6 JA |
1818 | Run the before-change-function, if any. If intervals are in use, |
1819 | verify that the text to be modified is not read-only, and call | |
d206af14 RS |
1820 | any modification properties the text may have. |
1821 | ||
1822 | If PRESERVE_PTR is nonzero, we relocate *PRESERVE_PTR | |
1823 | by holding its value temporarily in a marker. */ | |
b45433b3 | 1824 | |
c660b094 | 1825 | void |
9628fed7 SM |
1826 | prepare_to_modify_buffer (EMACS_INT start, EMACS_INT end, |
1827 | EMACS_INT *preserve_ptr) | |
b45433b3 | 1828 | { |
234fb773 CY |
1829 | struct buffer *base_buffer; |
1830 | ||
4b4deea2 | 1831 | if (!NILP (BVAR (current_buffer, read_only))) |
b45433b3 JB |
1832 | Fbarf_if_buffer_read_only (); |
1833 | ||
2e9f55fd GM |
1834 | /* Let redisplay consider other windows than selected_window |
1835 | if modifying another buffer. */ | |
1836 | if (XBUFFER (XWINDOW (selected_window)->buffer) != current_buffer) | |
1837 | ++windows_or_buffers_changed; | |
1838 | ||
9fbf87cd | 1839 | if (BUF_INTERVALS (current_buffer) != 0) |
d206af14 RS |
1840 | { |
1841 | if (preserve_ptr) | |
1842 | { | |
1843 | Lisp_Object preserve_marker; | |
1844 | struct gcpro gcpro1; | |
1845 | preserve_marker = Fcopy_marker (make_number (*preserve_ptr), Qnil); | |
1846 | GCPRO1 (preserve_marker); | |
1847 | verify_interval_modification (current_buffer, start, end); | |
1848 | *preserve_ptr = marker_position (preserve_marker); | |
dab0b04d | 1849 | unchain_marker (XMARKER (preserve_marker)); |
d206af14 RS |
1850 | UNGCPRO; |
1851 | } | |
1852 | else | |
1853 | verify_interval_modification (current_buffer, start, end); | |
1854 | } | |
b45433b3 | 1855 | |
234fb773 CY |
1856 | /* For indirect buffers, use the base buffer to check clashes. */ |
1857 | if (current_buffer->base_buffer != 0) | |
1858 | base_buffer = current_buffer->base_buffer; | |
1859 | else | |
1860 | base_buffer = current_buffer; | |
1861 | ||
b45433b3 | 1862 | #ifdef CLASH_DETECTION |
4b4deea2 | 1863 | if (!NILP (BVAR (base_buffer, file_truename)) |
ab6c5c0c | 1864 | /* Make binding buffer-file-name to nil effective. */ |
4b4deea2 | 1865 | && !NILP (BVAR (base_buffer, filename)) |
9fbf87cd | 1866 | && SAVE_MODIFF >= MODIFF) |
4b4deea2 | 1867 | lock_file (BVAR (base_buffer, file_truename)); |
b45433b3 JB |
1868 | #else |
1869 | /* At least warn if this file has changed on disk since it was visited. */ | |
4b4deea2 | 1870 | if (!NILP (BVAR (base_buffer, filename)) |
9fbf87cd | 1871 | && SAVE_MODIFF >= MODIFF |
d427b66a | 1872 | && NILP (Fverify_visited_file_modtime (Fcurrent_buffer ())) |
4b4deea2 | 1873 | && !NILP (Ffile_exists_p (BVAR (base_buffer, filename)))) |
b45433b3 | 1874 | call1 (intern ("ask-user-about-supersession-threat"), |
4b4deea2 | 1875 | BVAR (base_buffer,filename)); |
b45433b3 JB |
1876 | #endif /* not CLASH_DETECTION */ |
1877 | ||
9852377f | 1878 | /* If `select-active-regions' is non-nil, save the region text. */ |
4b4deea2 | 1879 | if (!NILP (BVAR (current_buffer, mark_active)) |
8b78d5e3 | 1880 | && !inhibit_modification_hooks |
4b4deea2 | 1881 | && XMARKER (BVAR (current_buffer, mark))->buffer |
7c23dd44 CY |
1882 | && NILP (Vsaved_region_selection) |
1883 | && (EQ (Vselect_active_regions, Qonly) | |
1884 | ? EQ (CAR_SAFE (Vtransient_mark_mode), Qonly) | |
1885 | : (!NILP (Vselect_active_regions) | |
1886 | && !NILP (Vtransient_mark_mode)))) | |
9852377f | 1887 | { |
4b4deea2 | 1888 | EMACS_INT b = XMARKER (BVAR (current_buffer, mark))->charpos; |
413d18e7 | 1889 | EMACS_INT e = PT; |
746812d9 CY |
1890 | if (b < e) |
1891 | Vsaved_region_selection = make_buffer_string (b, e, 0); | |
1892 | else if (b > e) | |
1893 | Vsaved_region_selection = make_buffer_string (e, b, 0); | |
9852377f CY |
1894 | } |
1895 | ||
d206af14 | 1896 | signal_before_change (start, end, preserve_ptr); |
2f545eea | 1897 | |
56e1065e JB |
1898 | if (current_buffer->newline_cache) |
1899 | invalidate_region_cache (current_buffer, | |
1900 | current_buffer->newline_cache, | |
1901 | start - BEG, Z - end); | |
1902 | if (current_buffer->width_run_cache) | |
1903 | invalidate_region_cache (current_buffer, | |
1904 | current_buffer->width_run_cache, | |
1905 | start - BEG, Z - end); | |
1906 | ||
2f545eea | 1907 | Vdeactivate_mark = Qt; |
b45433b3 JB |
1908 | } |
1909 | \f | |
d206af14 RS |
1910 | /* These macros work with an argument named `preserve_ptr' |
1911 | and a local variable named `preserve_marker'. */ | |
1912 | ||
1913 | #define PRESERVE_VALUE \ | |
1914 | if (preserve_ptr && NILP (preserve_marker)) \ | |
1915 | preserve_marker = Fcopy_marker (make_number (*preserve_ptr), Qnil) | |
1916 | ||
1917 | #define RESTORE_VALUE \ | |
1918 | if (! NILP (preserve_marker)) \ | |
1919 | { \ | |
1920 | *preserve_ptr = marker_position (preserve_marker); \ | |
dab0b04d | 1921 | unchain_marker (XMARKER (preserve_marker)); \ |
d206af14 RS |
1922 | } |
1923 | ||
b86e0aaf RS |
1924 | #define PRESERVE_START_END \ |
1925 | if (NILP (start_marker)) \ | |
1926 | start_marker = Fcopy_marker (start, Qnil); \ | |
1927 | if (NILP (end_marker)) \ | |
1928 | end_marker = Fcopy_marker (end, Qnil); | |
1929 | ||
1930 | #define FETCH_START \ | |
1931 | (! NILP (start_marker) ? Fmarker_position (start_marker) : start) | |
1932 | ||
1933 | #define FETCH_END \ | |
1934 | (! NILP (end_marker) ? Fmarker_position (end_marker) : end) | |
1935 | ||
4a181359 | 1936 | /* Set a variable to nil if an error occurred. |
e6d3f090 SM |
1937 | Don't change the variable if there was no error. |
1938 | VAL is a cons-cell (VARIABLE . NO-ERROR-FLAG). | |
1939 | VARIABLE is the variable to maybe set to nil. | |
1940 | NO-ERROR-FLAG is nil if there was an error, | |
1941 | anything else meaning no error (so this function does nothing). */ | |
85876d07 | 1942 | static Lisp_Object |
971de7fb | 1943 | reset_var_on_error (Lisp_Object val) |
4a181359 SM |
1944 | { |
1945 | if (NILP (XCDR (val))) | |
1946 | Fset (XCAR (val), Qnil); | |
1947 | return Qnil; | |
1948 | } | |
1949 | ||
eb8c3be9 | 1950 | /* Signal a change to the buffer immediately before it happens. |
d206af14 RS |
1951 | START_INT and END_INT are the bounds of the text to be changed. |
1952 | ||
1953 | If PRESERVE_PTR is nonzero, we relocate *PRESERVE_PTR | |
1954 | by holding its value temporarily in a marker. */ | |
b45433b3 | 1955 | |
4889fc82 | 1956 | static void |
ae19ba7c | 1957 | signal_before_change (EMACS_INT start_int, EMACS_INT end_int, |
9628fed7 | 1958 | EMACS_INT *preserve_ptr) |
b45433b3 | 1959 | { |
fb4ee5cd | 1960 | Lisp_Object start, end; |
b86e0aaf | 1961 | Lisp_Object start_marker, end_marker; |
d206af14 | 1962 | Lisp_Object preserve_marker; |
b86e0aaf | 1963 | struct gcpro gcpro1, gcpro2, gcpro3; |
4a181359 | 1964 | int count = SPECPDL_INDEX (); |
fb4ee5cd | 1965 | |
fd16a4c6 KH |
1966 | if (inhibit_modification_hooks) |
1967 | return; | |
1968 | ||
fb4ee5cd RS |
1969 | start = make_number (start_int); |
1970 | end = make_number (end_int); | |
d206af14 | 1971 | preserve_marker = Qnil; |
b86e0aaf RS |
1972 | start_marker = Qnil; |
1973 | end_marker = Qnil; | |
1974 | GCPRO3 (preserve_marker, start_marker, end_marker); | |
fb4ee5cd | 1975 | |
4a181359 SM |
1976 | specbind (Qinhibit_modification_hooks, Qt); |
1977 | ||
dee091a3 JD |
1978 | /* If buffer is unmodified, run a special hook for that case. The |
1979 | check for Vfirst_change_hook is just a minor optimization. */ | |
9fbf87cd | 1980 | if (SAVE_MODIFF >= MODIFF |
dee091a3 | 1981 | && !NILP (Vfirst_change_hook)) |
d206af14 RS |
1982 | { |
1983 | PRESERVE_VALUE; | |
b86e0aaf | 1984 | PRESERVE_START_END; |
dee091a3 | 1985 | Frun_hooks (1, &Qfirst_change_hook); |
d206af14 | 1986 | } |
dbc4e1c1 | 1987 | |
3d1e2d9c | 1988 | /* Now run the before-change-functions if any. */ |
e45fb8bf RS |
1989 | if (!NILP (Vbefore_change_functions)) |
1990 | { | |
3d1e2d9c | 1991 | Lisp_Object args[3]; |
4a181359 | 1992 | Lisp_Object rvoe_arg = Fcons (Qbefore_change_functions, Qnil); |
3d1e2d9c | 1993 | |
d206af14 | 1994 | PRESERVE_VALUE; |
b86e0aaf | 1995 | PRESERVE_START_END; |
d206af14 | 1996 | |
4a181359 SM |
1997 | /* Mark before-change-functions to be reset to nil in case of error. */ |
1998 | record_unwind_protect (reset_var_on_error, rvoe_arg); | |
3d1e2d9c RS |
1999 | |
2000 | /* Actually run the hook functions. */ | |
2001 | args[0] = Qbefore_change_functions; | |
b86e0aaf RS |
2002 | args[1] = FETCH_START; |
2003 | args[2] = FETCH_END; | |
4a181359 | 2004 | Frun_hook_with_args (3, args); |
3d1e2d9c | 2005 | |
4a181359 SM |
2006 | /* There was no error: unarm the reset_on_error. */ |
2007 | XSETCDR (rvoe_arg, Qt); | |
e45fb8bf | 2008 | } |
d07c0804 | 2009 | |
fbebdf81 | 2010 | if (current_buffer->overlays_before || current_buffer->overlays_after) |
d206af14 RS |
2011 | { |
2012 | PRESERVE_VALUE; | |
b86e0aaf RS |
2013 | report_overlay_modification (FETCH_START, FETCH_END, 0, |
2014 | FETCH_START, FETCH_END, Qnil); | |
d206af14 RS |
2015 | } |
2016 | ||
b86e0aaf RS |
2017 | if (! NILP (start_marker)) |
2018 | free_marker (start_marker); | |
2019 | if (! NILP (end_marker)) | |
2020 | free_marker (end_marker); | |
d206af14 RS |
2021 | RESTORE_VALUE; |
2022 | UNGCPRO; | |
4a181359 SM |
2023 | |
2024 | unbind_to (count, Qnil); | |
b45433b3 JB |
2025 | } |
2026 | ||
eb8c3be9 | 2027 | /* Signal a change immediately after it happens. |
3be11131 | 2028 | CHARPOS is the character position of the start of the changed text. |
b45433b3 JB |
2029 | LENDEL is the number of characters of the text before the change. |
2030 | (Not the whole buffer; just the part that was changed.) | |
8b09e5d0 RS |
2031 | LENINS is the number of characters in that part of the text |
2032 | after the change. */ | |
b45433b3 | 2033 | |
c660b094 | 2034 | void |
ae19ba7c | 2035 | signal_after_change (EMACS_INT charpos, EMACS_INT lendel, EMACS_INT lenins) |
b45433b3 | 2036 | { |
4a181359 | 2037 | int count = SPECPDL_INDEX (); |
fd16a4c6 KH |
2038 | if (inhibit_modification_hooks) |
2039 | return; | |
2040 | ||
fb2e7d14 RS |
2041 | /* If we are deferring calls to the after-change functions |
2042 | and there are no before-change functions, | |
2043 | just record the args that we were going to use. */ | |
2044 | if (! NILP (Vcombine_after_change_calls) | |
1675d086 | 2045 | && NILP (Vbefore_change_functions) |
fbebdf81 SM |
2046 | && !current_buffer->overlays_before |
2047 | && !current_buffer->overlays_after) | |
fb2e7d14 RS |
2048 | { |
2049 | Lisp_Object elt; | |
2050 | ||
2051 | if (!NILP (combine_after_change_list) | |
2052 | && current_buffer != XBUFFER (combine_after_change_buffer)) | |
2053 | Fcombine_after_change_execute (); | |
2054 | ||
3be11131 RS |
2055 | elt = Fcons (make_number (charpos - BEG), |
2056 | Fcons (make_number (Z - (charpos - lendel + lenins)), | |
fb2e7d14 RS |
2057 | Fcons (make_number (lenins - lendel), Qnil))); |
2058 | combine_after_change_list | |
2059 | = Fcons (elt, combine_after_change_list); | |
2060 | combine_after_change_buffer = Fcurrent_buffer (); | |
2061 | ||
2062 | return; | |
2063 | } | |
2064 | ||
177c0ea7 | 2065 | if (!NILP (combine_after_change_list)) |
fb2e7d14 RS |
2066 | Fcombine_after_change_execute (); |
2067 | ||
4a181359 SM |
2068 | specbind (Qinhibit_modification_hooks, Qt); |
2069 | ||
e45fb8bf RS |
2070 | if (!NILP (Vafter_change_functions)) |
2071 | { | |
3d1e2d9c | 2072 | Lisp_Object args[4]; |
4a181359 SM |
2073 | Lisp_Object rvoe_arg = Fcons (Qafter_change_functions, Qnil); |
2074 | ||
2075 | /* Mark after-change-functions to be reset to nil in case of error. */ | |
2076 | record_unwind_protect (reset_var_on_error, rvoe_arg); | |
3d1e2d9c RS |
2077 | |
2078 | /* Actually run the hook functions. */ | |
2079 | args[0] = Qafter_change_functions; | |
3be11131 RS |
2080 | XSETFASTINT (args[1], charpos); |
2081 | XSETFASTINT (args[2], charpos + lenins); | |
3d1e2d9c | 2082 | XSETFASTINT (args[3], lendel); |
4a181359 | 2083 | Frun_hook_with_args (4, args); |
3d1e2d9c | 2084 | |
4a181359 SM |
2085 | /* There was no error: unarm the reset_on_error. */ |
2086 | XSETCDR (rvoe_arg, Qt); | |
e45fb8bf | 2087 | } |
d07c0804 | 2088 | |
fbebdf81 | 2089 | if (current_buffer->overlays_before || current_buffer->overlays_after) |
3be11131 RS |
2090 | report_overlay_modification (make_number (charpos), |
2091 | make_number (charpos + lenins), | |
d07c0804 | 2092 | 1, |
3be11131 RS |
2093 | make_number (charpos), |
2094 | make_number (charpos + lenins), | |
d07c0804 | 2095 | make_number (lendel)); |
c5ca0786 RS |
2096 | |
2097 | /* After an insertion, call the text properties | |
2098 | insert-behind-hooks or insert-in-front-hooks. */ | |
2099 | if (lendel == 0) | |
d6b81c0f AS |
2100 | report_interval_modification (make_number (charpos), |
2101 | make_number (charpos + lenins)); | |
4a181359 SM |
2102 | |
2103 | unbind_to (count, Qnil); | |
b45433b3 | 2104 | } |
fb2e7d14 | 2105 | |
85876d07 | 2106 | static Lisp_Object |
971de7fb | 2107 | Fcombine_after_change_execute_1 (Lisp_Object val) |
fb2e7d14 RS |
2108 | { |
2109 | Vcombine_after_change_calls = val; | |
2110 | return val; | |
2111 | } | |
2112 | ||
2113 | DEFUN ("combine-after-change-execute", Fcombine_after_change_execute, | |
335c5470 PJ |
2114 | Scombine_after_change_execute, 0, 0, 0, |
2115 | doc: /* This function is for use internally in `combine-after-change-calls'. */) | |
5842a27b | 2116 | (void) |
fb2e7d14 | 2117 | { |
aed13378 | 2118 | int count = SPECPDL_INDEX (); |
ae19ba7c SM |
2119 | EMACS_INT beg, end, change; |
2120 | EMACS_INT begpos, endpos; | |
fb2e7d14 RS |
2121 | Lisp_Object tail; |
2122 | ||
101e446f KH |
2123 | if (NILP (combine_after_change_list)) |
2124 | return Qnil; | |
2125 | ||
c47a9ed1 CY |
2126 | /* It is rare for combine_after_change_buffer to be invalid, but |
2127 | possible. It can happen when combine-after-change-calls is | |
2128 | non-nil, and insertion calls a file handler (e.g. through | |
2129 | lock_file) which scribbles into a temp file -- cyd */ | |
2130 | if (!BUFFERP (combine_after_change_buffer) | |
4b4deea2 | 2131 | || NILP (BVAR (XBUFFER (combine_after_change_buffer), name))) |
c47a9ed1 CY |
2132 | { |
2133 | combine_after_change_list = Qnil; | |
2134 | return Qnil; | |
2135 | } | |
2136 | ||
fb2e7d14 RS |
2137 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); |
2138 | ||
2139 | Fset_buffer (combine_after_change_buffer); | |
2140 | ||
2141 | /* # chars unchanged at beginning of buffer. */ | |
2142 | beg = Z - BEG; | |
2143 | /* # chars unchanged at end of buffer. */ | |
2144 | end = beg; | |
2145 | /* Total amount of insertion (negative for deletion). */ | |
2146 | change = 0; | |
2147 | ||
2148 | /* Scan the various individual changes, | |
2149 | accumulating the range info in BEG, END and CHANGE. */ | |
2150 | for (tail = combine_after_change_list; CONSP (tail); | |
03699b14 | 2151 | tail = XCDR (tail)) |
fb2e7d14 | 2152 | { |
e688a080 | 2153 | Lisp_Object elt; |
ae19ba7c | 2154 | EMACS_INT thisbeg, thisend, thischange; |
fb2e7d14 RS |
2155 | |
2156 | /* Extract the info from the next element. */ | |
03699b14 | 2157 | elt = XCAR (tail); |
fb2e7d14 RS |
2158 | if (! CONSP (elt)) |
2159 | continue; | |
03699b14 | 2160 | thisbeg = XINT (XCAR (elt)); |
fb2e7d14 | 2161 | |
03699b14 | 2162 | elt = XCDR (elt); |
fb2e7d14 RS |
2163 | if (! CONSP (elt)) |
2164 | continue; | |
03699b14 | 2165 | thisend = XINT (XCAR (elt)); |
fb2e7d14 | 2166 | |
03699b14 | 2167 | elt = XCDR (elt); |
fb2e7d14 RS |
2168 | if (! CONSP (elt)) |
2169 | continue; | |
03699b14 | 2170 | thischange = XINT (XCAR (elt)); |
fb2e7d14 RS |
2171 | |
2172 | /* Merge this range into the accumulated range. */ | |
2173 | change += thischange; | |
2174 | if (thisbeg < beg) | |
2175 | beg = thisbeg; | |
2176 | if (thisend < end) | |
2177 | end = thisend; | |
2178 | } | |
2179 | ||
2180 | /* Get the current start and end positions of the range | |
2181 | that was changed. */ | |
2182 | begpos = BEG + beg; | |
2183 | endpos = Z - end; | |
177c0ea7 | 2184 | |
fb2e7d14 RS |
2185 | /* We are about to handle these, so discard them. */ |
2186 | combine_after_change_list = Qnil; | |
2187 | ||
2188 | /* Now run the after-change functions for real. | |
2189 | Turn off the flag that defers them. */ | |
2190 | record_unwind_protect (Fcombine_after_change_execute_1, | |
2191 | Vcombine_after_change_calls); | |
2192 | signal_after_change (begpos, endpos - begpos - change, endpos - begpos); | |
0ef71121 | 2193 | update_compositions (begpos, endpos, CHECK_ALL); |
fb2e7d14 | 2194 | |
101e446f | 2195 | return unbind_to (count, Qnil); |
fb2e7d14 RS |
2196 | } |
2197 | \f | |
dfcf069d | 2198 | void |
971de7fb | 2199 | syms_of_insdel (void) |
fb2e7d14 RS |
2200 | { |
2201 | staticpro (&combine_after_change_list); | |
bf0bf758 | 2202 | staticpro (&combine_after_change_buffer); |
fb2e7d14 | 2203 | combine_after_change_list = Qnil; |
101e446f | 2204 | combine_after_change_buffer = Qnil; |
fb2e7d14 | 2205 | |
29208e82 | 2206 | DEFVAR_BOOL ("check-markers-debug-flag", check_markers_debug_flag, |
335c5470 | 2207 | doc: /* Non-nil means enable debugging checks for invalid marker positions. */); |
60ea6052 | 2208 | check_markers_debug_flag = 0; |
29208e82 | 2209 | DEFVAR_LISP ("combine-after-change-calls", Vcombine_after_change_calls, |
335c5470 | 2210 | doc: /* Used internally by the `combine-after-change-calls' macro. */); |
fb2e7d14 RS |
2211 | Vcombine_after_change_calls = Qnil; |
2212 | ||
29208e82 | 2213 | DEFVAR_BOOL ("inhibit-modification-hooks", inhibit_modification_hooks, |
335c5470 PJ |
2214 | doc: /* Non-nil means don't run any of the hooks that respond to buffer changes. |
2215 | This affects `before-change-functions' and `after-change-functions', | |
2216 | as well as hooks attached to text properties and overlays. */); | |
7baf49cf | 2217 | inhibit_modification_hooks = 0; |
cd3520a4 | 2218 | DEFSYM (Qinhibit_modification_hooks, "inhibit-modification-hooks"); |
7baf49cf | 2219 | |
fb2e7d14 RS |
2220 | defsubr (&Scombine_after_change_execute); |
2221 | } |