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" |
811f7370 | 28 | #include "character.h" |
e5560ff7 | 29 | #include "buffer.h" |
b45433b3 | 30 | #include "window.h" |
d014bf88 | 31 | #include "blockinput.h" |
dfcf069d | 32 | #include "region-cache.h" |
b45433b3 | 33 | |
ae19ba7c | 34 | static void insert_from_string_1 (Lisp_Object string, |
d311d28c PE |
35 | ptrdiff_t pos, ptrdiff_t pos_byte, |
36 | ptrdiff_t nchars, ptrdiff_t nbytes, | |
ae19ba7c SM |
37 | int inherit, int before_markers); |
38 | static void insert_from_buffer_1 (struct buffer *buf, | |
d311d28c | 39 | ptrdiff_t from, ptrdiff_t nchars, |
ae19ba7c | 40 | int inherit); |
d311d28c PE |
41 | static void gap_left (ptrdiff_t charpos, ptrdiff_t bytepos, int newgap); |
42 | static void gap_right (ptrdiff_t charpos, ptrdiff_t bytepos); | |
395ec62e | 43 | |
fb2e7d14 RS |
44 | /* List of elements of the form (BEG-UNCHANGED END-UNCHANGED CHANGE-AMOUNT) |
45 | describing changes which happened while combine_after_change_calls | |
46 | was nonzero. We use this to decide how to call them | |
47 | once the deferral ends. | |
48 | ||
49 | In each element. | |
50 | BEG-UNCHANGED is the number of chars before the changed range. | |
51 | END-UNCHANGED is the number of chars after the changed range, | |
52 | and CHANGE-AMOUNT is the number of characters inserted by the change | |
53 | (negative for a deletion). */ | |
77382fcc | 54 | static Lisp_Object combine_after_change_list; |
fb2e7d14 RS |
55 | |
56 | /* Buffer which combine_after_change_list is about. */ | |
77382fcc | 57 | static Lisp_Object combine_after_change_buffer; |
27ea0af2 GM |
58 | |
59 | Lisp_Object Qinhibit_modification_hooks; | |
4889fc82 | 60 | |
d311d28c | 61 | static void signal_before_change (ptrdiff_t, ptrdiff_t, ptrdiff_t *); |
e2688e4a DA |
62 | |
63 | /* Also used in marker.c to enable expensive marker checks. */ | |
64 | ||
65 | #ifdef MARKER_DEBUG | |
60ea6052 | 66 | |
85876d07 | 67 | static void |
971de7fb | 68 | check_markers (void) |
60ea6052 | 69 | { |
dab0b04d | 70 | register struct Lisp_Marker *tail; |
4b4deea2 | 71 | int multibyte = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); |
60ea6052 | 72 | |
dab0b04d | 73 | for (tail = BUF_MARKERS (current_buffer); tail; tail = tail->next) |
60ea6052 | 74 | { |
dab0b04d | 75 | if (tail->buffer->text != current_buffer->text) |
60ea6052 | 76 | abort (); |
dab0b04d | 77 | if (tail->charpos > Z) |
60ea6052 | 78 | abort (); |
dab0b04d | 79 | if (tail->bytepos > Z_BYTE) |
60ea6052 | 80 | abort (); |
dab0b04d | 81 | if (multibyte && ! CHAR_HEAD_P (FETCH_BYTE (tail->bytepos))) |
9f3ede3c | 82 | abort (); |
60ea6052 RS |
83 | } |
84 | } | |
e2688e4a DA |
85 | |
86 | #else /* not MARKER_DEBUG */ | |
87 | ||
88 | #define check_markers() do { } while (0) | |
89 | ||
90 | #endif /* MARKER_DEBUG */ | |
91 | ||
3be11131 | 92 | /* Move gap to position CHARPOS. |
b45433b3 JB |
93 | Note that this can quit! */ |
94 | ||
c660b094 | 95 | void |
d311d28c | 96 | move_gap (ptrdiff_t 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 | |
d311d28c | 105 | move_gap_both (ptrdiff_t charpos, ptrdiff_t 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 |
d311d28c | 119 | gap_left (ptrdiff_t charpos, ptrdiff_t bytepos, int newgap) |
b45433b3 JB |
120 | { |
121 | register unsigned char *to, *from; | |
d311d28c PE |
122 | register ptrdiff_t i; |
123 | ptrdiff_t 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; | |
e2688e4a | 163 | eassert (charpos <= bytepos); |
469ff680 | 164 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
b45433b3 JB |
165 | QUIT; |
166 | } | |
167 | ||
2b34df4e | 168 | /* Move the gap to a position greater than the current GPT. |
3be11131 RS |
169 | BYTEPOS describes the new position as a byte position, |
170 | and CHARPOS is the corresponding char position. */ | |
171 | ||
2bcaed71 | 172 | static void |
d311d28c | 173 | gap_right (ptrdiff_t charpos, ptrdiff_t bytepos) |
b45433b3 JB |
174 | { |
175 | register unsigned char *to, *from; | |
d311d28c PE |
176 | register ptrdiff_t i; |
177 | ptrdiff_t new_s1; | |
b45433b3 | 178 | |
a50df55b | 179 | BUF_COMPUTE_UNCHANGED (current_buffer, charpos, GPT); |
b45433b3 | 180 | |
3be11131 | 181 | i = GPT_BYTE; |
b45433b3 JB |
182 | from = GAP_END_ADDR; |
183 | to = GPT_ADDR; | |
3be11131 | 184 | new_s1 = GPT_BYTE; |
b45433b3 JB |
185 | |
186 | /* Now copy the characters. To move the gap up, | |
187 | copy characters down. */ | |
188 | ||
189 | while (1) | |
190 | { | |
191 | /* I gets number of characters left to copy. */ | |
3be11131 | 192 | i = bytepos - new_s1; |
b45433b3 JB |
193 | if (i == 0) |
194 | break; | |
195 | /* If a quit is requested, stop copying now. | |
3be11131 | 196 | Change BYTEPOS to be where we have actually moved the gap to. */ |
b45433b3 JB |
197 | if (QUITP) |
198 | { | |
3be11131 RS |
199 | bytepos = new_s1; |
200 | charpos = BYTE_TO_CHAR (bytepos); | |
b45433b3 JB |
201 | break; |
202 | } | |
203 | /* Move at most 32000 chars before checking again for a quit. */ | |
204 | if (i > 32000) | |
205 | i = 32000; | |
72af86bd AS |
206 | new_s1 += i; |
207 | memmove (to, from, i); | |
208 | from += i, to += i; | |
b45433b3 JB |
209 | } |
210 | ||
3be11131 RS |
211 | GPT = charpos; |
212 | GPT_BYTE = bytepos; | |
e2688e4a | 213 | eassert (charpos <= bytepos); |
469ff680 | 214 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
b45433b3 JB |
215 | QUIT; |
216 | } | |
2b083808 | 217 | \f |
3be11131 RS |
218 | /* Adjust all markers for a deletion |
219 | whose range in bytes is FROM_BYTE to TO_BYTE. | |
220 | The range in charpos is FROM to TO. | |
221 | ||
222 | This function assumes that the gap is adjacent to | |
223 | or inside of the range being deleted. */ | |
beecb55b | 224 | |
809f3d51 | 225 | void |
d311d28c PE |
226 | adjust_markers_for_delete (ptrdiff_t from, ptrdiff_t from_byte, |
227 | ptrdiff_t to, ptrdiff_t to_byte) | |
3be11131 RS |
228 | { |
229 | Lisp_Object marker; | |
230 | register struct Lisp_Marker *m; | |
d311d28c | 231 | register ptrdiff_t charpos; |
3be11131 | 232 | |
dab0b04d | 233 | for (m = BUF_MARKERS (current_buffer); m; m = m->next) |
3be11131 | 234 | { |
3be11131 | 235 | charpos = m->charpos; |
e2688e4a | 236 | eassert (charpos <= Z); |
3be11131 RS |
237 | |
238 | /* If the marker is after the deletion, | |
80f6e77c | 239 | relocate by number of chars / bytes deleted. */ |
3be11131 | 240 | if (charpos > to) |
80f6e77c RS |
241 | { |
242 | m->charpos -= to - from; | |
243 | m->bytepos -= to_byte - from_byte; | |
244 | } | |
80f6e77c | 245 | /* Here's the case where a marker is inside text being deleted. */ |
3be11131 RS |
246 | else if (charpos > from) |
247 | { | |
00de2987 | 248 | if (! m->insertion_type) |
dab0b04d | 249 | { /* Normal markers will end up at the beginning of the |
00de2987 | 250 | re-inserted text after undoing a deletion, and must be |
177c0ea7 | 251 | adjusted to move them to the correct place. */ |
dab0b04d | 252 | XSETMISC (marker, m); |
28259cac | 253 | record_marker_adjustment (marker, from - charpos); |
dab0b04d | 254 | } |
00de2987 | 255 | else if (charpos < to) |
dab0b04d | 256 | { /* Before-insertion markers will automatically move forward |
00de2987 MB |
257 | upon re-inserting the deleted text, so we have to arrange |
258 | for them to move backward to the correct position. */ | |
dab0b04d | 259 | XSETMISC (marker, m); |
28259cac | 260 | record_marker_adjustment (marker, to - charpos); |
dab0b04d | 261 | } |
3be11131 | 262 | m->charpos = from; |
80f6e77c | 263 | m->bytepos = from_byte; |
3be11131 | 264 | } |
00de2987 MB |
265 | /* Here's the case where a before-insertion marker is immediately |
266 | before the deleted region. */ | |
267 | else if (charpos == from && m->insertion_type) | |
268 | { | |
269 | /* Undoing the change uses normal insertion, which will | |
270 | incorrectly make MARKER move forward, so we arrange for it | |
271 | to then move backward to the correct place at the beginning | |
272 | of the deleted region. */ | |
dab0b04d | 273 | XSETMISC (marker, m); |
00de2987 MB |
274 | record_marker_adjustment (marker, to - from); |
275 | } | |
3be11131 RS |
276 | } |
277 | } | |
23b20a70 | 278 | |
2b083808 | 279 | \f |
432f78d2 RS |
280 | /* Adjust markers for an insertion that stretches from FROM / FROM_BYTE |
281 | to TO / TO_BYTE. We have to relocate the charpos of every marker | |
282 | that points after the insertion (but not their bytepos). | |
3be11131 | 283 | |
3be11131 RS |
284 | When a marker points at the insertion point, |
285 | we advance it if either its insertion-type is t | |
286 | or BEFORE_MARKERS is true. */ | |
287 | ||
288 | static void | |
d311d28c PE |
289 | adjust_markers_for_insert (ptrdiff_t from, ptrdiff_t from_byte, |
290 | ptrdiff_t to, ptrdiff_t to_byte, int before_markers) | |
beecb55b | 291 | { |
dab0b04d | 292 | struct Lisp_Marker *m; |
469ff680 | 293 | int adjusted = 0; |
d311d28c PE |
294 | ptrdiff_t nchars = to - from; |
295 | ptrdiff_t nbytes = to_byte - from_byte; | |
beecb55b | 296 | |
dab0b04d | 297 | for (m = BUF_MARKERS (current_buffer); m; m = m->next) |
beecb55b | 298 | { |
86a56ef3 SM |
299 | eassert (m->bytepos >= m->charpos |
300 | && m->bytepos - m->charpos <= Z_BYTE - Z); | |
1f90a790 | 301 | |
432f78d2 | 302 | if (m->bytepos == from_byte) |
469ff680 | 303 | { |
432f78d2 RS |
304 | if (m->insertion_type || before_markers) |
305 | { | |
b16afa45 KH |
306 | m->bytepos = to_byte; |
307 | m->charpos = to; | |
432f78d2 RS |
308 | if (m->insertion_type) |
309 | adjusted = 1; | |
310 | } | |
ce97a2d7 | 311 | } |
80f6e77c RS |
312 | else if (m->bytepos > from_byte) |
313 | { | |
314 | m->bytepos += nbytes; | |
b16afa45 | 315 | m->charpos += nchars; |
80f6e77c | 316 | } |
beecb55b | 317 | } |
3be11131 RS |
318 | |
319 | /* Adjusting only markers whose insertion-type is t may result in | |
409f2919 | 320 | - disordered start and end in overlays, and |
6b61353c | 321 | - disordered overlays in the slot `overlays_before' of current_buffer. */ |
469ff680 | 322 | if (adjusted) |
6b61353c | 323 | { |
5e617bc2 | 324 | fix_start_end_in_overlays (from, to); |
6b61353c KH |
325 | fix_overlays_before (current_buffer, from, to); |
326 | } | |
beecb55b RS |
327 | } |
328 | ||
3be11131 RS |
329 | /* Adjust point for an insertion of NBYTES bytes, which are NCHARS characters. |
330 | ||
331 | This is used only when the value of point changes due to an insert | |
332 | or delete; it does not represent a conceptual change in point as a | |
333 | marker. In particular, point is not crossing any interval | |
334 | boundaries, so there's no need to use the usual SET_PT macro. In | |
335 | fact it would be incorrect to do so, because either the old or the | |
336 | new value of point is out of sync with the current set of | |
337 | intervals. */ | |
338 | ||
a27a38d8 | 339 | static void |
d311d28c | 340 | adjust_point (ptrdiff_t nchars, ptrdiff_t nbytes) |
a27a38d8 | 341 | { |
cffc6f3b | 342 | SET_BUF_PT_BOTH (current_buffer, PT + nchars, PT_BYTE + nbytes); |
3be11131 | 343 | /* In a single-byte buffer, the two positions must be equal. */ |
86a56ef3 | 344 | eassert (PT_BYTE >= PT && PT_BYTE - PT <= ZV_BYTE - ZV); |
a27a38d8 | 345 | } |
b45433b3 | 346 | \f |
652838b5 KH |
347 | /* Adjust markers for a replacement of a text at FROM (FROM_BYTE) of |
348 | length OLD_CHARS (OLD_BYTES) to a new text of length NEW_CHARS | |
adee4f91 KH |
349 | (NEW_BYTES). It is assumed that OLD_CHARS > 0, i.e., this is not |
350 | an insertion. */ | |
652838b5 KH |
351 | |
352 | static void | |
d311d28c PE |
353 | adjust_markers_for_replace (ptrdiff_t from, ptrdiff_t from_byte, |
354 | ptrdiff_t old_chars, ptrdiff_t old_bytes, | |
355 | ptrdiff_t new_chars, ptrdiff_t new_bytes) | |
652838b5 | 356 | { |
dab0b04d | 357 | register struct Lisp_Marker *m; |
d311d28c PE |
358 | ptrdiff_t prev_to_byte = from_byte + old_bytes; |
359 | ptrdiff_t diff_chars = new_chars - old_chars; | |
360 | ptrdiff_t diff_bytes = new_bytes - old_bytes; | |
652838b5 | 361 | |
dab0b04d | 362 | for (m = BUF_MARKERS (current_buffer); m; m = m->next) |
652838b5 | 363 | { |
adee4f91 | 364 | if (m->bytepos >= prev_to_byte) |
652838b5 | 365 | { |
adee4f91 KH |
366 | m->charpos += diff_chars; |
367 | m->bytepos += diff_bytes; | |
652838b5 | 368 | } |
adee4f91 | 369 | else if (m->bytepos > from_byte) |
652838b5 | 370 | { |
652838b5 | 371 | m->charpos = from; |
b16afa45 | 372 | m->bytepos = from_byte; |
652838b5 | 373 | } |
652838b5 | 374 | } |
3019692c | 375 | |
e2688e4a | 376 | check_markers (); |
652838b5 KH |
377 | } |
378 | ||
379 | \f | |
99561444 PE |
380 | void |
381 | buffer_overflow (void) | |
382 | { | |
383 | error ("Maximum buffer size exceeded"); | |
384 | } | |
385 | ||
3be11131 | 386 | /* Make the gap NBYTES_ADDED bytes longer. */ |
b45433b3 | 387 | |
85876d07 | 388 | static void |
d311d28c | 389 | make_gap_larger (ptrdiff_t nbytes_added) |
b45433b3 | 390 | { |
b45433b3 | 391 | Lisp_Object tem; |
d311d28c PE |
392 | ptrdiff_t real_gap_loc; |
393 | ptrdiff_t real_gap_loc_byte; | |
394 | ptrdiff_t old_gap_size; | |
395 | ptrdiff_t current_size = Z_BYTE - BEG_BYTE + GAP_SIZE; | |
1c8e352f | 396 | enum { enough_for_a_while = 2000 }; |
b45433b3 | 397 | |
1c8e352f PE |
398 | if (BUF_BYTES_MAX - current_size < nbytes_added) |
399 | buffer_overflow (); | |
b45433b3 | 400 | |
1c8e352f PE |
401 | /* If we have to get more space, get enough to last a while; |
402 | but do not exceed the maximum buffer size. */ | |
403 | nbytes_added = min (nbytes_added + enough_for_a_while, | |
404 | BUF_BYTES_MAX - current_size); | |
94056516 | 405 | |
71a7bfa7 | 406 | enlarge_buffer_text (current_buffer, nbytes_added); |
b45433b3 JB |
407 | |
408 | /* Prevent quitting in move_gap. */ | |
409 | tem = Vinhibit_quit; | |
410 | Vinhibit_quit = Qt; | |
411 | ||
412 | real_gap_loc = GPT; | |
3be11131 | 413 | real_gap_loc_byte = GPT_BYTE; |
b45433b3 JB |
414 | old_gap_size = GAP_SIZE; |
415 | ||
416 | /* Call the newly allocated space a gap at the end of the whole space. */ | |
417 | GPT = Z + GAP_SIZE; | |
7d92db58 | 418 | GPT_BYTE = Z_BYTE + GAP_SIZE; |
3be11131 | 419 | GAP_SIZE = nbytes_added; |
b45433b3 JB |
420 | |
421 | /* Move the new gap down to be consecutive with the end of the old one. | |
422 | This adjusts the markers properly too. */ | |
3be11131 | 423 | gap_left (real_gap_loc + old_gap_size, real_gap_loc_byte + old_gap_size, 1); |
b45433b3 JB |
424 | |
425 | /* Now combine the two into one large gap. */ | |
426 | GAP_SIZE += old_gap_size; | |
427 | GPT = real_gap_loc; | |
3be11131 | 428 | GPT_BYTE = real_gap_loc_byte; |
b45433b3 | 429 | |
469ff680 KH |
430 | /* Put an anchor. */ |
431 | *(Z_ADDR) = 0; | |
432 | ||
b45433b3 JB |
433 | Vinhibit_quit = tem; |
434 | } | |
8af5b8e7 | 435 | |
b58c5c4a | 436 | #if defined USE_MMAP_FOR_BUFFERS || defined REL_ALLOC || defined DOUG_LEA_MALLOC |
8af5b8e7 | 437 | |
7273faa1 | 438 | /* Make the gap NBYTES_REMOVED bytes shorter. */ |
8af5b8e7 | 439 | |
85876d07 | 440 | static void |
d311d28c | 441 | make_gap_smaller (ptrdiff_t nbytes_removed) |
8af5b8e7 AI |
442 | { |
443 | Lisp_Object tem; | |
d311d28c PE |
444 | ptrdiff_t real_gap_loc; |
445 | ptrdiff_t real_gap_loc_byte; | |
446 | ptrdiff_t real_Z; | |
447 | ptrdiff_t real_Z_byte; | |
448 | ptrdiff_t real_beg_unchanged; | |
449 | ptrdiff_t new_gap_size; | |
8af5b8e7 AI |
450 | |
451 | /* Make sure the gap is at least 20 bytes. */ | |
452 | if (GAP_SIZE - nbytes_removed < 20) | |
453 | nbytes_removed = GAP_SIZE - 20; | |
454 | ||
455 | /* Prevent quitting in move_gap. */ | |
456 | tem = Vinhibit_quit; | |
457 | Vinhibit_quit = Qt; | |
458 | ||
459 | real_gap_loc = GPT; | |
460 | real_gap_loc_byte = GPT_BYTE; | |
73df3b72 | 461 | new_gap_size = GAP_SIZE - nbytes_removed; |
8af5b8e7 AI |
462 | real_Z = Z; |
463 | real_Z_byte = Z_BYTE; | |
73df3b72 | 464 | real_beg_unchanged = BEG_UNCHANGED; |
8af5b8e7 AI |
465 | |
466 | /* Pretend that the last unwanted part of the gap is the entire gap, | |
467 | and that the first desired part of the gap is part of the buffer | |
468 | text. */ | |
72af86bd | 469 | memset (GPT_ADDR, 0, new_gap_size); |
73df3b72 KS |
470 | GPT += new_gap_size; |
471 | GPT_BYTE += new_gap_size; | |
472 | Z += new_gap_size; | |
473 | Z_BYTE += new_gap_size; | |
8af5b8e7 AI |
474 | GAP_SIZE = nbytes_removed; |
475 | ||
476 | /* Move the unwanted pretend gap to the end of the buffer. This | |
477 | adjusts the markers properly too. */ | |
478 | gap_right (Z, Z_BYTE); | |
479 | ||
480 | enlarge_buffer_text (current_buffer, -nbytes_removed); | |
481 | ||
482 | /* Now restore the desired gap. */ | |
73df3b72 | 483 | GAP_SIZE = new_gap_size; |
8af5b8e7 AI |
484 | GPT = real_gap_loc; |
485 | GPT_BYTE = real_gap_loc_byte; | |
486 | Z = real_Z; | |
487 | Z_BYTE = real_Z_byte; | |
73df3b72 | 488 | BEG_UNCHANGED = real_beg_unchanged; |
8af5b8e7 AI |
489 | |
490 | /* Put an anchor. */ | |
491 | *(Z_ADDR) = 0; | |
492 | ||
493 | Vinhibit_quit = tem; | |
494 | } | |
495 | ||
b58c5c4a PE |
496 | #endif /* USE_MMAP_FOR_BUFFERS || REL_ALLOC || DOUG_LEA_MALLOC */ |
497 | ||
8af5b8e7 | 498 | void |
d311d28c | 499 | make_gap (ptrdiff_t nbytes_added) |
8af5b8e7 AI |
500 | { |
501 | if (nbytes_added >= 0) | |
502 | make_gap_larger (nbytes_added); | |
d77fbc16 | 503 | #if defined USE_MMAP_FOR_BUFFERS || defined REL_ALLOC || defined DOUG_LEA_MALLOC |
8af5b8e7 AI |
504 | else |
505 | make_gap_smaller (-nbytes_added); | |
506 | #endif | |
507 | } | |
b45433b3 | 508 | \f |
2b083808 RS |
509 | /* Copy NBYTES bytes of text from FROM_ADDR to TO_ADDR. |
510 | FROM_MULTIBYTE says whether the incoming text is multibyte. | |
511 | TO_MULTIBYTE says whether to store the text as multibyte. | |
512 | If FROM_MULTIBYTE != TO_MULTIBYTE, we convert. | |
513 | ||
514 | Return the number of bytes stored at TO_ADDR. */ | |
515 | ||
d311d28c | 516 | ptrdiff_t |
ae19ba7c | 517 | copy_text (const unsigned char *from_addr, unsigned char *to_addr, |
d311d28c | 518 | ptrdiff_t nbytes, int from_multibyte, int to_multibyte) |
2b083808 RS |
519 | { |
520 | if (from_multibyte == to_multibyte) | |
521 | { | |
72af86bd | 522 | memcpy (to_addr, from_addr, nbytes); |
2b083808 RS |
523 | return nbytes; |
524 | } | |
525 | else if (from_multibyte) | |
526 | { | |
d311d28c PE |
527 | ptrdiff_t nchars = 0; |
528 | ptrdiff_t bytes_left = nbytes; | |
f44cbcd8 | 529 | |
2b083808 RS |
530 | while (bytes_left > 0) |
531 | { | |
b16afa45 | 532 | int thislen, c; |
62a6e103 | 533 | c = STRING_CHAR_AND_LENGTH (from_addr, thislen); |
1ede3eb6 KH |
534 | if (! ASCII_CHAR_P (c)) |
535 | c &= 0xFF; | |
f44cbcd8 | 536 | *to_addr++ = c; |
2b083808 | 537 | from_addr += thislen; |
7e79b8e0 | 538 | bytes_left -= thislen; |
2b083808 RS |
539 | nchars++; |
540 | } | |
541 | return nchars; | |
542 | } | |
543 | else | |
544 | { | |
545 | unsigned char *initial_to_addr = to_addr; | |
546 | ||
547 | /* Convert single-byte to multibyte. */ | |
548 | while (nbytes > 0) | |
549 | { | |
550 | int c = *from_addr++; | |
2b083808 | 551 | |
4c0354d7 | 552 | if (!ASCII_CHAR_P (c)) |
2b083808 | 553 | { |
4c0354d7 | 554 | c = BYTE8_TO_CHAR (c); |
0ef71121 | 555 | to_addr += CHAR_STRING (c, to_addr); |
2b083808 RS |
556 | nbytes--; |
557 | } | |
558 | else | |
559 | /* Special case for speed. */ | |
560 | *to_addr++ = c, nbytes--; | |
561 | } | |
562 | return to_addr - initial_to_addr; | |
563 | } | |
564 | } | |
2b083808 | 565 | \f |
b45433b3 | 566 | /* Insert a string of specified length before point. |
2b083808 RS |
567 | This function judges multibyteness based on |
568 | enable_multibyte_characters in the current buffer; | |
569 | it never converts between single-byte and multibyte. | |
570 | ||
ef29f213 KH |
571 | DO NOT use this for the contents of a Lisp string or a Lisp buffer! |
572 | prepare_to_modify_buffer could relocate the text. */ | |
b45433b3 | 573 | |
c660b094 | 574 | void |
d311d28c | 575 | insert (const char *string, ptrdiff_t nbytes) |
b45433b3 | 576 | { |
3be11131 | 577 | if (nbytes > 0) |
395ec62e | 578 | { |
d311d28c | 579 | ptrdiff_t len = chars_in_text ((unsigned char *) string, nbytes), opoint; |
bab3eee1 EZ |
580 | insert_1_both (string, len, nbytes, 0, 1, 0); |
581 | opoint = PT - len; | |
582 | signal_after_change (opoint, 0, len); | |
0ef71121 | 583 | update_compositions (opoint, PT, CHECK_BORDER); |
cd11ef31 RS |
584 | } |
585 | } | |
586 | ||
2b083808 RS |
587 | /* Likewise, but inherit text properties from neighboring characters. */ |
588 | ||
c660b094 | 589 | void |
d311d28c | 590 | insert_and_inherit (const char *string, ptrdiff_t nbytes) |
cd11ef31 | 591 | { |
3be11131 | 592 | if (nbytes > 0) |
cd11ef31 | 593 | { |
d311d28c | 594 | ptrdiff_t len = chars_in_text ((unsigned char *) string, nbytes), opoint; |
bab3eee1 EZ |
595 | insert_1_both (string, len, nbytes, 1, 1, 0); |
596 | opoint = PT - len; | |
597 | signal_after_change (opoint, 0, len); | |
0ef71121 | 598 | update_compositions (opoint, PT, CHECK_BORDER); |
395ec62e KH |
599 | } |
600 | } | |
b45433b3 | 601 | |
2b083808 | 602 | /* Insert the character C before point. Do not inherit text properties. */ |
3be11131 | 603 | |
c660b094 | 604 | void |
ae19ba7c | 605 | insert_char (int c) |
3be11131 | 606 | { |
0ef71121 | 607 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
2b083808 RS |
608 | int len; |
609 | ||
4b4deea2 | 610 | if (! NILP (BVAR (current_buffer, enable_multibyte_characters))) |
0ef71121 | 611 | len = CHAR_STRING (c, str); |
2b083808 RS |
612 | else |
613 | { | |
614 | len = 1; | |
0ef71121 | 615 | str[0] = c; |
2b083808 | 616 | } |
3be11131 | 617 | |
b68864e5 | 618 | insert ((char *) str, len); |
3be11131 RS |
619 | } |
620 | ||
2b083808 | 621 | /* Insert the null-terminated string S before point. */ |
3be11131 RS |
622 | |
623 | void | |
ae19ba7c | 624 | insert_string (const char *s) |
3be11131 RS |
625 | { |
626 | insert (s, strlen (s)); | |
627 | } | |
628 | ||
629 | /* Like `insert' except that all markers pointing at the place where | |
630 | the insertion happens are adjusted to point after it. | |
631 | Don't use this function to insert part of a Lisp string, | |
632 | since gc could happen and relocate it. */ | |
633 | ||
634 | void | |
d311d28c | 635 | insert_before_markers (const char *string, ptrdiff_t nbytes) |
3be11131 RS |
636 | { |
637 | if (nbytes > 0) | |
638 | { | |
d311d28c | 639 | ptrdiff_t len = chars_in_text ((unsigned char *) string, nbytes), opoint; |
bab3eee1 EZ |
640 | insert_1_both (string, len, nbytes, 0, 1, 1); |
641 | opoint = PT - len; | |
642 | signal_after_change (opoint, 0, len); | |
0ef71121 | 643 | update_compositions (opoint, PT, CHECK_BORDER); |
3be11131 RS |
644 | } |
645 | } | |
646 | ||
2b083808 RS |
647 | /* Likewise, but inherit text properties from neighboring characters. */ |
648 | ||
3be11131 | 649 | void |
b68864e5 | 650 | insert_before_markers_and_inherit (const char *string, |
d311d28c | 651 | ptrdiff_t nbytes) |
3be11131 RS |
652 | { |
653 | if (nbytes > 0) | |
654 | { | |
d311d28c | 655 | ptrdiff_t len = chars_in_text ((unsigned char *) string, nbytes), opoint; |
bab3eee1 EZ |
656 | insert_1_both (string, len, nbytes, 1, 1, 1); |
657 | opoint = PT - len; | |
658 | signal_after_change (opoint, 0, len); | |
0ef71121 | 659 | update_compositions (opoint, PT, CHECK_BORDER); |
3be11131 RS |
660 | } |
661 | } | |
1f90a790 | 662 | |
3be11131 RS |
663 | /* Subroutine used by the insert functions above. */ |
664 | ||
665 | void | |
d311d28c | 666 | insert_1 (const char *string, ptrdiff_t nbytes, |
ae19ba7c | 667 | int inherit, int prepare, int before_markers) |
395ec62e | 668 | { |
b68864e5 PE |
669 | insert_1_both (string, chars_in_text ((unsigned char *) string, nbytes), |
670 | nbytes, inherit, prepare, before_markers); | |
432f78d2 | 671 | } |
b16afa45 | 672 | |
1f90a790 | 673 | \f |
b16afa45 KH |
674 | #ifdef BYTE_COMBINING_DEBUG |
675 | ||
432f78d2 RS |
676 | /* See if the bytes before POS/POS_BYTE combine with bytes |
677 | at the start of STRING to form a single character. | |
ce97a2d7 | 678 | If so, return the number of bytes at the start of STRING |
432f78d2 | 679 | which combine in this way. Otherwise, return 0. */ |
b45433b3 | 680 | |
432f78d2 | 681 | int |
d311d28c PE |
682 | count_combining_before (const unsigned char *string, ptrdiff_t length, |
683 | ptrdiff_t pos, ptrdiff_t pos_byte) | |
432f78d2 | 684 | { |
cae184f2 | 685 | int len, combining_bytes; |
641a26d2 | 686 | const unsigned char *p; |
b45433b3 | 687 | |
432f78d2 RS |
688 | if (NILP (current_buffer->enable_multibyte_characters)) |
689 | return 0; | |
cae184f2 KH |
690 | |
691 | /* At first, we can exclude the following cases: | |
692 | (1) STRING[0] can't be a following byte of multibyte sequence. | |
693 | (2) POS is the start of the current buffer. | |
694 | (3) A character before POS is not a multibyte character. */ | |
695 | if (length == 0 || CHAR_HEAD_P (*string)) /* case (1) */ | |
432f78d2 | 696 | return 0; |
cae184f2 | 697 | if (pos_byte == BEG_BYTE) /* case (2) */ |
432f78d2 | 698 | return 0; |
cae184f2 KH |
699 | len = 1; |
700 | p = BYTE_POS_ADDR (pos_byte - 1); | |
701 | while (! CHAR_HEAD_P (*p)) p--, len++; | |
409f2919 | 702 | if (! LEADING_CODE_P (*p)) /* case (3) */ |
432f78d2 | 703 | return 0; |
cae184f2 | 704 | |
cae184f2 KH |
705 | combining_bytes = BYTES_BY_CHAR_HEAD (*p) - len; |
706 | if (combining_bytes <= 0) | |
707 | /* The character preceding POS is, complete and no room for | |
708 | combining bytes (combining_bytes == 0), or an independent 8-bit | |
709 | character (combining_bytes < 0). */ | |
432f78d2 | 710 | return 0; |
ce97a2d7 | 711 | |
cae184f2 KH |
712 | /* We have a combination situation. Count the bytes at STRING that |
713 | may combine. */ | |
714 | p = string + 1; | |
ce97a2d7 RS |
715 | while (!CHAR_HEAD_P (*p) && p < string + length) |
716 | p++; | |
717 | ||
cae184f2 | 718 | return (combining_bytes < p - string ? combining_bytes : p - string); |
432f78d2 | 719 | } |
b45433b3 | 720 | |
432f78d2 RS |
721 | /* See if the bytes after POS/POS_BYTE combine with bytes |
722 | at the end of STRING to form a single character. | |
723 | If so, return the number of bytes after POS/POS_BYTE | |
724 | which combine in this way. Otherwise, return 0. */ | |
679194a6 | 725 | |
432f78d2 | 726 | int |
ae19ba7c | 727 | count_combining_after (const unsigned char *string, |
d311d28c | 728 | ptrdiff_t length, ptrdiff_t pos, ptrdiff_t pos_byte) |
432f78d2 | 729 | { |
d311d28c PE |
730 | ptrdiff_t opos_byte = pos_byte; |
731 | ptrdiff_t i; | |
732 | ptrdiff_t bytes; | |
cae184f2 | 733 | unsigned char *bufp; |
3be11131 | 734 | |
432f78d2 RS |
735 | if (NILP (current_buffer->enable_multibyte_characters)) |
736 | return 0; | |
cae184f2 KH |
737 | |
738 | /* At first, we can exclude the following cases: | |
739 | (1) The last byte of STRING is an ASCII. | |
740 | (2) POS is the last of the current buffer. | |
741 | (3) A character at POS can't be a following byte of multibyte | |
742 | character. */ | |
743 | if (length > 0 && ASCII_BYTE_P (string[length - 1])) /* case (1) */ | |
744 | return 0; | |
745 | if (pos_byte == Z_BYTE) /* case (2) */ | |
432f78d2 | 746 | return 0; |
cae184f2 KH |
747 | bufp = BYTE_POS_ADDR (pos_byte); |
748 | if (CHAR_HEAD_P (*bufp)) /* case (3) */ | |
749 | return 0; | |
750 | ||
432f78d2 | 751 | i = length - 1; |
b57a7b0b | 752 | while (i >= 0 && ! CHAR_HEAD_P (string[i])) |
432f78d2 RS |
753 | { |
754 | i--; | |
755 | } | |
b57a7b0b KH |
756 | if (i < 0) |
757 | { | |
cae184f2 KH |
758 | /* All characters in STRING are not character head. We must |
759 | check also preceding bytes at POS. We are sure that the gap | |
760 | is at POS. */ | |
761 | unsigned char *p = BEG_ADDR; | |
b57a7b0b | 762 | i = pos_byte - 2; |
cae184f2 | 763 | while (i >= 0 && ! CHAR_HEAD_P (p[i])) |
b57a7b0b | 764 | i--; |
409f2919 | 765 | if (i < 0 || !LEADING_CODE_P (p[i])) |
b57a7b0b | 766 | return 0; |
0ef71121 | 767 | |
cae184f2 KH |
768 | bytes = BYTES_BY_CHAR_HEAD (p[i]); |
769 | return (bytes <= pos_byte - 1 - i + length | |
770 | ? 0 | |
771 | : bytes - (pos_byte - 1 - i + length)); | |
b57a7b0b | 772 | } |
409f2919 | 773 | if (!LEADING_CODE_P (string[i])) |
432f78d2 RS |
774 | return 0; |
775 | ||
cae184f2 KH |
776 | bytes = BYTES_BY_CHAR_HEAD (string[i]) - (length - i); |
777 | bufp++, pos_byte++; | |
778 | while (!CHAR_HEAD_P (*bufp)) bufp++, pos_byte++; | |
cd11ef31 | 779 | |
cae184f2 | 780 | return (bytes <= pos_byte - opos_byte ? bytes : pos_byte - opos_byte); |
b45433b3 | 781 | } |
2b083808 | 782 | |
b16afa45 | 783 | #endif |
9f3ede3c | 784 | |
1f90a790 | 785 | \f |
2b083808 RS |
786 | /* Insert a sequence of NCHARS chars which occupy NBYTES bytes |
787 | starting at STRING. INHERIT, PREPARE and BEFORE_MARKERS | |
788 | are the same as in insert_1. */ | |
789 | ||
790 | void | |
b68864e5 | 791 | insert_1_both (const char *string, |
d311d28c | 792 | ptrdiff_t nchars, ptrdiff_t nbytes, |
ae19ba7c | 793 | int inherit, int prepare, int before_markers) |
2b083808 | 794 | { |
da80a8d5 GM |
795 | if (nchars == 0) |
796 | return; | |
177c0ea7 | 797 | |
4b4deea2 | 798 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
57404188 KH |
799 | nchars = nbytes; |
800 | ||
35d63725 RS |
801 | if (prepare) |
802 | /* Do this before moving and increasing the gap, | |
803 | because the before-change hooks might move the gap | |
804 | or make it smaller. */ | |
805 | prepare_to_modify_buffer (PT, PT, NULL); | |
806 | ||
2b083808 RS |
807 | if (PT != GPT) |
808 | move_gap_both (PT, PT_BYTE); | |
809 | if (GAP_SIZE < nbytes) | |
810 | make_gap (nbytes - GAP_SIZE); | |
811 | ||
b16afa45 KH |
812 | #ifdef BYTE_COMBINING_DEBUG |
813 | if (count_combining_before (string, nbytes, PT, PT_BYTE) | |
814 | || count_combining_after (string, nbytes, PT, PT_BYTE)) | |
815 | abort (); | |
816 | #endif | |
432f78d2 RS |
817 | |
818 | /* Record deletion of the surrounding text that combines with | |
819 | the insertion. This, together with recording the insertion, | |
b16afa45 KH |
820 | will add up to the right stuff in the undo list. */ |
821 | record_insert (PT, nchars); | |
2b083808 | 822 | MODIFF++; |
3e145152 | 823 | CHARS_MODIFF = MODIFF; |
2b083808 | 824 | |
72af86bd | 825 | memcpy (GPT_ADDR, string, nbytes); |
2b083808 | 826 | |
2b083808 | 827 | GAP_SIZE -= nbytes; |
1f90a790 RS |
828 | GPT += nchars; |
829 | ZV += nchars; | |
830 | Z += nchars; | |
2b083808 RS |
831 | GPT_BYTE += nbytes; |
832 | ZV_BYTE += nbytes; | |
833 | Z_BYTE += nbytes; | |
834 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ | |
1f90a790 | 835 | |
e2688e4a | 836 | eassert (GPT <= GPT_BYTE); |
1f90a790 | 837 | |
9dde4e0c KS |
838 | /* The insert may have been in the unchanged region, so check again. */ |
839 | if (Z - GPT < END_UNCHANGED) | |
840 | END_UNCHANGED = Z - GPT; | |
841 | ||
1f90a790 | 842 | adjust_overlays_for_insert (PT, nchars); |
432f78d2 | 843 | adjust_markers_for_insert (PT, PT_BYTE, |
1f90a790 | 844 | PT + nchars, PT_BYTE + nbytes, |
2b083808 | 845 | before_markers); |
ce97a2d7 | 846 | |
1f90a790 | 847 | if (BUF_INTERVALS (current_buffer) != 0) |
1f90a790 RS |
848 | offset_intervals (current_buffer, PT, nchars); |
849 | ||
ce97a2d7 | 850 | if (!inherit && BUF_INTERVALS (current_buffer) != 0) |
f2cab2ea GM |
851 | set_text_properties (make_number (PT), make_number (PT + nchars), |
852 | Qnil, Qnil, Qnil); | |
ce97a2d7 | 853 | |
b16afa45 | 854 | adjust_point (nchars, nbytes); |
828f1ed3 | 855 | |
e2688e4a | 856 | check_markers (); |
2b083808 | 857 | } |
3be11131 | 858 | \f |
679194a6 | 859 | /* Insert the part of the text of STRING, a Lisp object assumed to be |
2b083808 RS |
860 | of type string, consisting of the LENGTH characters (LENGTH_BYTE bytes) |
861 | starting at position POS / POS_BYTE. If the text of STRING has properties, | |
862 | copy them into the buffer. | |
679194a6 JA |
863 | |
864 | It does not work to use `insert' for this, because a GC could happen | |
72af86bd | 865 | before we copy the stuff into the buffer, and relocate the string |
7e1ea612 | 866 | without insert noticing. */ |
679194a6 | 867 | |
c660b094 | 868 | void |
d311d28c PE |
869 | insert_from_string (Lisp_Object string, ptrdiff_t pos, ptrdiff_t pos_byte, |
870 | ptrdiff_t length, ptrdiff_t length_byte, int inherit) | |
395ec62e | 871 | { |
d311d28c | 872 | ptrdiff_t opoint = PT; |
d8bf4256 RS |
873 | |
874 | if (SCHARS (string) == 0) | |
875 | return; | |
876 | ||
62b82678 RS |
877 | insert_from_string_1 (string, pos, pos_byte, length, length_byte, |
878 | inherit, 0); | |
879 | signal_after_change (opoint, 0, PT - opoint); | |
0ef71121 | 880 | update_compositions (opoint, PT, CHECK_BORDER); |
395ec62e KH |
881 | } |
882 | ||
2b083808 RS |
883 | /* Like `insert_from_string' except that all markers pointing |
884 | at the place where the insertion happens are adjusted to point after it. */ | |
3be11131 RS |
885 | |
886 | void | |
ae19ba7c | 887 | insert_from_string_before_markers (Lisp_Object string, |
d311d28c PE |
888 | ptrdiff_t pos, ptrdiff_t pos_byte, |
889 | ptrdiff_t length, ptrdiff_t length_byte, | |
ae19ba7c | 890 | int inherit) |
3be11131 | 891 | { |
d311d28c | 892 | ptrdiff_t opoint = PT; |
d8bf4256 RS |
893 | |
894 | if (SCHARS (string) == 0) | |
895 | return; | |
896 | ||
62b82678 RS |
897 | insert_from_string_1 (string, pos, pos_byte, length, length_byte, |
898 | inherit, 1); | |
899 | signal_after_change (opoint, 0, PT - opoint); | |
0ef71121 | 900 | update_compositions (opoint, PT, CHECK_BORDER); |
3be11131 RS |
901 | } |
902 | ||
903 | /* Subroutine of the insertion functions above. */ | |
904 | ||
905 | static void | |
d311d28c PE |
906 | insert_from_string_1 (Lisp_Object string, ptrdiff_t pos, ptrdiff_t pos_byte, |
907 | ptrdiff_t nchars, ptrdiff_t nbytes, | |
ae19ba7c | 908 | int inherit, int before_markers) |
b45433b3 | 909 | { |
b45433b3 | 910 | struct gcpro gcpro1; |
d311d28c | 911 | ptrdiff_t outgoing_nbytes = nbytes; |
ce97a2d7 | 912 | INTERVAL intervals; |
2b083808 RS |
913 | |
914 | /* Make OUTGOING_NBYTES describe the text | |
915 | as it will be inserted in this buffer. */ | |
916 | ||
4b4deea2 | 917 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
2b083808 | 918 | outgoing_nbytes = nchars; |
2a1d8be0 | 919 | else if (! STRING_MULTIBYTE (string)) |
2b083808 | 920 | outgoing_nbytes |
f7e233a8 | 921 | = count_size_as_multibyte (SDATA (string) + pos_byte, |
2b083808 | 922 | nbytes); |
b45433b3 | 923 | |
b45433b3 | 924 | GCPRO1 (string); |
35d63725 RS |
925 | /* Do this before moving and increasing the gap, |
926 | because the before-change hooks might move the gap | |
927 | or make it smaller. */ | |
d206af14 | 928 | prepare_to_modify_buffer (PT, PT, NULL); |
b45433b3 | 929 | |
2bcaed71 | 930 | if (PT != GPT) |
3be11131 | 931 | move_gap_both (PT, PT_BYTE); |
534b9840 | 932 | if (GAP_SIZE < outgoing_nbytes) |
2b083808 | 933 | make_gap (outgoing_nbytes - GAP_SIZE); |
b45433b3 JB |
934 | UNGCPRO; |
935 | ||
2b083808 RS |
936 | /* Copy the string text into the buffer, perhaps converting |
937 | between single-byte and multibyte. */ | |
d5db4077 | 938 | copy_text (SDATA (string) + pos_byte, GPT_ADDR, nbytes, |
2a1d8be0 | 939 | STRING_MULTIBYTE (string), |
4b4deea2 | 940 | ! NILP (BVAR (current_buffer, enable_multibyte_characters))); |
b45433b3 | 941 | |
b16afa45 | 942 | #ifdef BYTE_COMBINING_DEBUG |
432f78d2 RS |
943 | /* We have copied text into the gap, but we have not altered |
944 | PT or PT_BYTE yet. So we can pass PT and PT_BYTE | |
945 | to these functions and get the same results as we would | |
946 | have got earlier on. Meanwhile, PT_ADDR does point to | |
947 | the text that has been stored by copy_text. */ | |
b16afa45 KH |
948 | if (count_combining_before (GPT_ADDR, outgoing_nbytes, PT, PT_BYTE) |
949 | || count_combining_after (GPT_ADDR, outgoing_nbytes, PT, PT_BYTE)) | |
950 | abort (); | |
951 | #endif | |
432f78d2 | 952 | |
b16afa45 | 953 | record_insert (PT, nchars); |
432f78d2 | 954 | MODIFF++; |
3e145152 | 955 | CHARS_MODIFF = MODIFF; |
432f78d2 | 956 | |
7792090e | 957 | GAP_SIZE -= outgoing_nbytes; |
1f90a790 RS |
958 | GPT += nchars; |
959 | ZV += nchars; | |
960 | Z += nchars; | |
2b083808 RS |
961 | GPT_BYTE += outgoing_nbytes; |
962 | ZV_BYTE += outgoing_nbytes; | |
963 | Z_BYTE += outgoing_nbytes; | |
469ff680 | 964 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
3be11131 | 965 | |
e2688e4a | 966 | eassert (GPT <= GPT_BYTE); |
679194a6 | 967 | |
9dde4e0c KS |
968 | /* The insert may have been in the unchanged region, so check again. */ |
969 | if (Z - GPT < END_UNCHANGED) | |
970 | END_UNCHANGED = Z - GPT; | |
971 | ||
1f90a790 RS |
972 | adjust_overlays_for_insert (PT, nchars); |
973 | adjust_markers_for_insert (PT, PT_BYTE, PT + nchars, | |
974 | PT_BYTE + outgoing_nbytes, | |
1f90a790 | 975 | before_markers); |
ce97a2d7 | 976 | |
1f90a790 RS |
977 | offset_intervals (current_buffer, PT, nchars); |
978 | ||
d5db4077 | 979 | intervals = STRING_INTERVALS (string); |
b16afa45 | 980 | /* Get the intervals for the part of the string we are inserting. */ |
d5db4077 | 981 | if (nbytes < SBYTES (string)) |
1f90a790 | 982 | intervals = copy_intervals (intervals, pos, nchars); |
177c0ea7 | 983 | |
ce97a2d7 | 984 | /* Insert those intervals. */ |
1f90a790 | 985 | graft_intervals_into_buffer (intervals, PT, nchars, |
9391e591 | 986 | current_buffer, inherit); |
ce97a2d7 | 987 | |
b16afa45 | 988 | adjust_point (nchars, outgoing_nbytes); |
8f924df7 | 989 | |
e2688e4a | 990 | check_markers (); |
8f924df7 KH |
991 | } |
992 | \f | |
993 | /* Insert a sequence of NCHARS chars which occupy NBYTES bytes | |
994 | starting at GPT_ADDR. */ | |
995 | ||
996 | void | |
d311d28c | 997 | insert_from_gap (ptrdiff_t nchars, ptrdiff_t nbytes) |
8f924df7 | 998 | { |
4b4deea2 | 999 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
8f924df7 KH |
1000 | nchars = nbytes; |
1001 | ||
1002 | record_insert (GPT, nchars); | |
1003 | MODIFF++; | |
1004 | ||
1005 | GAP_SIZE -= nbytes; | |
1006 | GPT += nchars; | |
1007 | ZV += nchars; | |
1008 | Z += nchars; | |
1009 | GPT_BYTE += nbytes; | |
1010 | ZV_BYTE += nbytes; | |
1011 | Z_BYTE += nbytes; | |
1012 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ | |
1013 | ||
e2688e4a | 1014 | eassert (GPT <= GPT_BYTE); |
8f924df7 | 1015 | |
c669988b KH |
1016 | adjust_overlays_for_insert (GPT - nchars, nchars); |
1017 | adjust_markers_for_insert (GPT - nchars, GPT_BYTE - nbytes, | |
1018 | GPT, GPT_BYTE, 0); | |
8f924df7 KH |
1019 | |
1020 | if (BUF_INTERVALS (current_buffer) != 0) | |
c669988b KH |
1021 | { |
1022 | offset_intervals (current_buffer, GPT - nchars, nchars); | |
1023 | graft_intervals_into_buffer (NULL_INTERVAL, GPT - nchars, nchars, | |
1024 | current_buffer, 0); | |
1025 | } | |
8f924df7 KH |
1026 | |
1027 | if (GPT - nchars < PT) | |
1028 | adjust_point (nchars, nbytes); | |
1029 | ||
e2688e4a | 1030 | check_markers (); |
b45433b3 | 1031 | } |
3be11131 RS |
1032 | \f |
1033 | /* Insert text from BUF, NCHARS characters starting at CHARPOS, into the | |
ef29f213 KH |
1034 | current buffer. If the text in BUF has properties, they are absorbed |
1035 | into the current buffer. | |
1036 | ||
1037 | It does not work to use `insert' for this, because a malloc could happen | |
72af86bd | 1038 | and relocate BUF's text before the copy happens. */ |
ef29f213 KH |
1039 | |
1040 | void | |
ae19ba7c | 1041 | insert_from_buffer (struct buffer *buf, |
d311d28c | 1042 | ptrdiff_t charpos, ptrdiff_t nchars, int inherit) |
ef29f213 | 1043 | { |
d311d28c | 1044 | ptrdiff_t opoint = PT; |
3be11131 | 1045 | |
62b82678 RS |
1046 | insert_from_buffer_1 (buf, charpos, nchars, inherit); |
1047 | signal_after_change (opoint, 0, PT - opoint); | |
0ef71121 | 1048 | update_compositions (opoint, PT, CHECK_BORDER); |
ef29f213 KH |
1049 | } |
1050 | ||
1051 | static void | |
ae19ba7c | 1052 | insert_from_buffer_1 (struct buffer *buf, |
d311d28c | 1053 | ptrdiff_t from, ptrdiff_t nchars, int inherit) |
ef29f213 | 1054 | { |
d311d28c PE |
1055 | ptrdiff_t chunk, chunk_expanded; |
1056 | ptrdiff_t from_byte = buf_charpos_to_bytepos (buf, from); | |
1057 | ptrdiff_t to_byte = buf_charpos_to_bytepos (buf, from + nchars); | |
1058 | ptrdiff_t incoming_nbytes = to_byte - from_byte; | |
1059 | ptrdiff_t outgoing_nbytes = incoming_nbytes; | |
ce97a2d7 | 1060 | INTERVAL intervals; |
2b083808 RS |
1061 | |
1062 | /* Make OUTGOING_NBYTES describe the text | |
1063 | as it will be inserted in this buffer. */ | |
1064 | ||
4b4deea2 | 1065 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
2b083808 | 1066 | outgoing_nbytes = nchars; |
4b4deea2 | 1067 | else if (NILP (BVAR (buf, enable_multibyte_characters))) |
4468c4f1 | 1068 | { |
d311d28c PE |
1069 | ptrdiff_t outgoing_before_gap = 0; |
1070 | ptrdiff_t outgoing_after_gap = 0; | |
ef29f213 | 1071 | |
4468c4f1 KH |
1072 | if (from < BUF_GPT (buf)) |
1073 | { | |
1074 | chunk = BUF_GPT_BYTE (buf) - from_byte; | |
1075 | if (chunk > incoming_nbytes) | |
1076 | chunk = incoming_nbytes; | |
1077 | outgoing_before_gap | |
1078 | = count_size_as_multibyte (BUF_BYTE_ADDRESS (buf, from_byte), | |
1079 | chunk); | |
1080 | } | |
1081 | else | |
1082 | chunk = 0; | |
1083 | ||
1084 | if (chunk < incoming_nbytes) | |
1085 | outgoing_after_gap | |
177c0ea7 | 1086 | = count_size_as_multibyte (BUF_BYTE_ADDRESS (buf, |
4468c4f1 KH |
1087 | from_byte + chunk), |
1088 | incoming_nbytes - chunk); | |
1089 | ||
1090 | outgoing_nbytes = outgoing_before_gap + outgoing_after_gap; | |
1091 | } | |
177c0ea7 | 1092 | |
35d63725 RS |
1093 | /* Do this before moving and increasing the gap, |
1094 | because the before-change hooks might move the gap | |
1095 | or make it smaller. */ | |
d206af14 | 1096 | prepare_to_modify_buffer (PT, PT, NULL); |
ef29f213 KH |
1097 | |
1098 | if (PT != GPT) | |
3be11131 | 1099 | move_gap_both (PT, PT_BYTE); |
2b083808 RS |
1100 | if (GAP_SIZE < outgoing_nbytes) |
1101 | make_gap (outgoing_nbytes - GAP_SIZE); | |
ef29f213 | 1102 | |
3be11131 | 1103 | if (from < BUF_GPT (buf)) |
ef29f213 | 1104 | { |
3be11131 | 1105 | chunk = BUF_GPT_BYTE (buf) - from_byte; |
2b083808 RS |
1106 | if (chunk > incoming_nbytes) |
1107 | chunk = incoming_nbytes; | |
4468c4f1 KH |
1108 | /* Record number of output bytes, so we know where |
1109 | to put the output from the second copy_text. */ | |
1110 | chunk_expanded | |
1111 | = copy_text (BUF_BYTE_ADDRESS (buf, from_byte), | |
1112 | GPT_ADDR, chunk, | |
4b4deea2 TT |
1113 | ! NILP (BVAR (buf, enable_multibyte_characters)), |
1114 | ! NILP (BVAR (current_buffer, enable_multibyte_characters))); | |
ef29f213 KH |
1115 | } |
1116 | else | |
4468c4f1 KH |
1117 | chunk_expanded = chunk = 0; |
1118 | ||
2b083808 RS |
1119 | if (chunk < incoming_nbytes) |
1120 | copy_text (BUF_BYTE_ADDRESS (buf, from_byte + chunk), | |
4468c4f1 | 1121 | GPT_ADDR + chunk_expanded, incoming_nbytes - chunk, |
4b4deea2 TT |
1122 | ! NILP (BVAR (buf, enable_multibyte_characters)), |
1123 | ! NILP (BVAR (current_buffer, enable_multibyte_characters))); | |
ef29f213 | 1124 | |
b16afa45 | 1125 | #ifdef BYTE_COMBINING_DEBUG |
432f78d2 RS |
1126 | /* We have copied text into the gap, but we have not altered |
1127 | PT or PT_BYTE yet. So we can pass PT and PT_BYTE | |
1128 | to these functions and get the same results as we would | |
1f90a790 | 1129 | have got earlier on. Meanwhile, GPT_ADDR does point to |
432f78d2 | 1130 | the text that has been stored by copy_text. */ |
b16afa45 KH |
1131 | if (count_combining_before (GPT_ADDR, outgoing_nbytes, PT, PT_BYTE) |
1132 | || count_combining_after (GPT_ADDR, outgoing_nbytes, PT, PT_BYTE)) | |
1133 | abort (); | |
1134 | #endif | |
432f78d2 | 1135 | |
b16afa45 | 1136 | record_insert (PT, nchars); |
432f78d2 | 1137 | MODIFF++; |
3e145152 | 1138 | CHARS_MODIFF = MODIFF; |
432f78d2 | 1139 | |
2b083808 | 1140 | GAP_SIZE -= outgoing_nbytes; |
1f90a790 RS |
1141 | GPT += nchars; |
1142 | ZV += nchars; | |
1143 | Z += nchars; | |
2b083808 RS |
1144 | GPT_BYTE += outgoing_nbytes; |
1145 | ZV_BYTE += outgoing_nbytes; | |
1146 | Z_BYTE += outgoing_nbytes; | |
469ff680 | 1147 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
1f90a790 | 1148 | |
e2688e4a | 1149 | eassert (GPT <= GPT_BYTE); |
1f90a790 | 1150 | |
9dde4e0c KS |
1151 | /* The insert may have been in the unchanged region, so check again. */ |
1152 | if (Z - GPT < END_UNCHANGED) | |
1153 | END_UNCHANGED = Z - GPT; | |
1154 | ||
1f90a790 RS |
1155 | adjust_overlays_for_insert (PT, nchars); |
1156 | adjust_markers_for_insert (PT, PT_BYTE, PT + nchars, | |
432f78d2 | 1157 | PT_BYTE + outgoing_nbytes, |
b16afa45 | 1158 | 0); |
ce97a2d7 | 1159 | |
1f90a790 RS |
1160 | if (BUF_INTERVALS (current_buffer) != 0) |
1161 | offset_intervals (current_buffer, PT, nchars); | |
ce97a2d7 | 1162 | |
b16afa45 | 1163 | /* Get the intervals for the part of the string we are inserting. */ |
ce97a2d7 | 1164 | intervals = BUF_INTERVALS (buf); |
f1a6b216 | 1165 | if (nchars < BUF_Z (buf) - BUF_BEG (buf)) |
06d8227a GM |
1166 | { |
1167 | if (buf == current_buffer && PT <= from) | |
1168 | from += nchars; | |
1169 | intervals = copy_intervals (intervals, from, nchars); | |
1170 | } | |
177c0ea7 | 1171 | |
ce97a2d7 | 1172 | /* Insert those intervals. */ |
1f90a790 | 1173 | graft_intervals_into_buffer (intervals, PT, nchars, current_buffer, inherit); |
ce97a2d7 | 1174 | |
b16afa45 | 1175 | adjust_point (nchars, outgoing_nbytes); |
b45433b3 JB |
1176 | } |
1177 | \f | |
652838b5 KH |
1178 | /* Record undo information and adjust markers and position keepers for |
1179 | a replacement of a text PREV_TEXT at FROM to a new text of LEN | |
1180 | chars (LEN_BYTE bytes) which resides in the gap just after | |
1181 | GPT_ADDR. | |
1182 | ||
1183 | PREV_TEXT nil means the new text was just inserted. */ | |
2d9eea44 | 1184 | |
77382fcc | 1185 | static void |
d311d28c PE |
1186 | adjust_after_replace (ptrdiff_t from, ptrdiff_t from_byte, |
1187 | Lisp_Object prev_text, ptrdiff_t len, ptrdiff_t len_byte) | |
1e9c7b7d | 1188 | { |
d311d28c | 1189 | ptrdiff_t nchars_del = 0, nbytes_del = 0; |
61415a25 | 1190 | |
b16afa45 KH |
1191 | #ifdef BYTE_COMBINING_DEBUG |
1192 | if (count_combining_before (GPT_ADDR, len_byte, from, from_byte) | |
1193 | || count_combining_after (GPT_ADDR, len_byte, from, from_byte)) | |
1194 | abort (); | |
1195 | #endif | |
1196 | ||
828f1ed3 KH |
1197 | if (STRINGP (prev_text)) |
1198 | { | |
d5db4077 KR |
1199 | nchars_del = SCHARS (prev_text); |
1200 | nbytes_del = SBYTES (prev_text); | |
828f1ed3 KH |
1201 | } |
1202 | ||
61415a25 KH |
1203 | /* Update various buffer positions for the new text. */ |
1204 | GAP_SIZE -= len_byte; | |
1205 | ZV += len; Z+= len; | |
1206 | ZV_BYTE += len_byte; Z_BYTE += len_byte; | |
1207 | GPT += len; GPT_BYTE += len_byte; | |
1208 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ | |
1209 | ||
adee4f91 KH |
1210 | if (nchars_del > 0) |
1211 | adjust_markers_for_replace (from, from_byte, nchars_del, nbytes_del, | |
1212 | len, len_byte); | |
1213 | else | |
1214 | adjust_markers_for_insert (from, from_byte, | |
1215 | from + len, from_byte + len_byte, 0); | |
b16afa45 | 1216 | |
4b4deea2 | 1217 | if (! EQ (BVAR (current_buffer, undo_list), Qt)) |
828f1ed3 | 1218 | { |
828f1ed3 | 1219 | if (nchars_del > 0) |
b16afa45 KH |
1220 | record_delete (from, prev_text); |
1221 | record_insert (from, len); | |
828f1ed3 | 1222 | } |
652838b5 KH |
1223 | |
1224 | if (len > nchars_del) | |
1225 | adjust_overlays_for_insert (from, len - nchars_del); | |
1226 | else if (len < nchars_del) | |
1227 | adjust_overlays_for_delete (from, nchars_del - len); | |
61415a25 | 1228 | if (BUF_INTERVALS (current_buffer) != 0) |
4a7cf15f KH |
1229 | { |
1230 | offset_intervals (current_buffer, from, len - nchars_del); | |
4a7cf15f | 1231 | } |
61415a25 | 1232 | |
b16afa45 KH |
1233 | if (from < PT) |
1234 | adjust_point (len - nchars_del, len_byte - nbytes_del); | |
61415a25 | 1235 | |
9f3ede3c | 1236 | /* As byte combining will decrease Z, we must check this again. */ |
a50df55b GM |
1237 | if (Z - GPT < END_UNCHANGED) |
1238 | END_UNCHANGED = Z - GPT; | |
9f3ede3c | 1239 | |
e2688e4a | 1240 | check_markers (); |
60ea6052 | 1241 | |
1e9c7b7d | 1242 | if (len == 0) |
b58e3ca1 RS |
1243 | evaporate_overlays (from); |
1244 | MODIFF++; | |
3e145152 | 1245 | CHARS_MODIFF = MODIFF; |
b58e3ca1 RS |
1246 | } |
1247 | ||
652838b5 KH |
1248 | /* Record undo information, adjust markers and position keepers for an |
1249 | insertion of a text from FROM (FROM_BYTE) to TO (TO_BYTE). The | |
1250 | text already exists in the current buffer but character length (TO | |
1251 | - FROM) may be incorrect, the correct length is NEWLEN. */ | |
1252 | ||
1253 | void | |
d311d28c PE |
1254 | adjust_after_insert (ptrdiff_t from, ptrdiff_t from_byte, |
1255 | ptrdiff_t to, ptrdiff_t to_byte, ptrdiff_t newlen) | |
652838b5 | 1256 | { |
d311d28c | 1257 | ptrdiff_t len = to - from, len_byte = to_byte - from_byte; |
652838b5 KH |
1258 | |
1259 | if (GPT != to) | |
1260 | move_gap_both (to, to_byte); | |
1261 | GAP_SIZE += len_byte; | |
1262 | GPT -= len; GPT_BYTE -= len_byte; | |
1263 | ZV -= len; ZV_BYTE -= len_byte; | |
1264 | Z -= len; Z_BYTE -= len_byte; | |
1265 | adjust_after_replace (from, from_byte, Qnil, newlen, len_byte); | |
1266 | } | |
085db7de | 1267 | \f |
3be11131 | 1268 | /* Replace the text from character positions FROM to TO with NEW, |
c5ca4d3a RS |
1269 | If PREPARE is nonzero, call prepare_to_modify_buffer. |
1270 | If INHERIT, the newly inserted text should inherit text properties | |
1271 | from the surrounding non-deleted text. */ | |
1272 | ||
1273 | /* Note that this does not yet handle markers quite right. | |
1274 | Also it needs to record a single undo-entry that does a replacement | |
1275 | rather than a separate delete and insert. | |
60aa777a RS |
1276 | That way, undo will also handle markers properly. |
1277 | ||
1278 | But if MARKERS is 0, don't relocate markers. */ | |
c5ca4d3a RS |
1279 | |
1280 | void | |
d311d28c | 1281 | replace_range (ptrdiff_t from, ptrdiff_t to, Lisp_Object new, |
ae19ba7c | 1282 | int prepare, int inherit, int markers) |
c5ca4d3a | 1283 | { |
d311d28c PE |
1284 | ptrdiff_t inschars = SCHARS (new); |
1285 | ptrdiff_t insbytes = SBYTES (new); | |
1286 | ptrdiff_t from_byte, to_byte; | |
1287 | ptrdiff_t nbytes_del, nchars_del; | |
c5ca4d3a | 1288 | struct gcpro gcpro1; |
ce97a2d7 | 1289 | INTERVAL intervals; |
d311d28c | 1290 | ptrdiff_t outgoing_insbytes = insbytes; |
23b20a70 | 1291 | Lisp_Object deletion; |
c5ca4d3a | 1292 | |
e2688e4a | 1293 | check_markers (); |
60ea6052 | 1294 | |
c5ca4d3a | 1295 | GCPRO1 (new); |
6bbd7a29 | 1296 | deletion = Qnil; |
c5ca4d3a RS |
1297 | |
1298 | if (prepare) | |
1299 | { | |
d311d28c | 1300 | ptrdiff_t range_length = to - from; |
c5ca4d3a RS |
1301 | prepare_to_modify_buffer (from, to, &from); |
1302 | to = from + range_length; | |
1303 | } | |
1304 | ||
3be11131 RS |
1305 | UNGCPRO; |
1306 | ||
b50a28de | 1307 | /* Make args be valid. */ |
c5ca4d3a RS |
1308 | if (from < BEGV) |
1309 | from = BEGV; | |
1310 | if (to > ZV) | |
1311 | to = ZV; | |
1312 | ||
3be11131 RS |
1313 | from_byte = CHAR_TO_BYTE (from); |
1314 | to_byte = CHAR_TO_BYTE (to); | |
c5ca4d3a | 1315 | |
3be11131 RS |
1316 | nchars_del = to - from; |
1317 | nbytes_del = to_byte - from_byte; | |
1318 | ||
1319 | if (nbytes_del <= 0 && insbytes == 0) | |
1320 | return; | |
c5ca4d3a | 1321 | |
1f90a790 RS |
1322 | /* Make OUTGOING_INSBYTES describe the text |
1323 | as it will be inserted in this buffer. */ | |
1324 | ||
4b4deea2 | 1325 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
1f90a790 | 1326 | outgoing_insbytes = inschars; |
2a1d8be0 | 1327 | else if (! STRING_MULTIBYTE (new)) |
1f90a790 | 1328 | outgoing_insbytes |
d5db4077 | 1329 | = count_size_as_multibyte (SDATA (new), insbytes); |
1f90a790 | 1330 | |
c5ca4d3a RS |
1331 | GCPRO1 (new); |
1332 | ||
1333 | /* Make sure the gap is somewhere in or next to what we are deleting. */ | |
1334 | if (from > GPT) | |
3be11131 | 1335 | gap_right (from, from_byte); |
c5ca4d3a | 1336 | if (to < GPT) |
3be11131 | 1337 | gap_left (to, to_byte, 0); |
c5ca4d3a | 1338 | |
039af53a KH |
1339 | /* Even if we don't record for undo, we must keep the original text |
1340 | because we may have to recover it because of inappropriate byte | |
1341 | combining. */ | |
4b4deea2 | 1342 | if (! EQ (BVAR (current_buffer, undo_list), Qt)) |
b16afa45 | 1343 | deletion = make_buffer_string_both (from, from_byte, to, to_byte, 1); |
c5ca4d3a | 1344 | |
3be11131 RS |
1345 | GAP_SIZE += nbytes_del; |
1346 | ZV -= nchars_del; | |
1347 | Z -= nchars_del; | |
1348 | ZV_BYTE -= nbytes_del; | |
1349 | Z_BYTE -= nbytes_del; | |
c5ca4d3a | 1350 | GPT = from; |
3be11131 | 1351 | GPT_BYTE = from_byte; |
017e09ac | 1352 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
c5ca4d3a | 1353 | |
e2688e4a | 1354 | eassert (GPT <= GPT_BYTE); |
3be11131 | 1355 | |
a50df55b GM |
1356 | if (GPT - BEG < BEG_UNCHANGED) |
1357 | BEG_UNCHANGED = GPT - BEG; | |
1358 | if (Z - GPT < END_UNCHANGED) | |
1359 | END_UNCHANGED = Z - GPT; | |
c5ca4d3a | 1360 | |
599a9e4f PE |
1361 | if (GAP_SIZE < outgoing_insbytes) |
1362 | make_gap (outgoing_insbytes - GAP_SIZE); | |
c5ca4d3a | 1363 | |
1f90a790 RS |
1364 | /* Copy the string text into the buffer, perhaps converting |
1365 | between single-byte and multibyte. */ | |
d5db4077 | 1366 | copy_text (SDATA (new), GPT_ADDR, insbytes, |
2a1d8be0 | 1367 | STRING_MULTIBYTE (new), |
4b4deea2 | 1368 | ! NILP (BVAR (current_buffer, enable_multibyte_characters))); |
1f90a790 | 1369 | |
b16afa45 | 1370 | #ifdef BYTE_COMBINING_DEBUG |
255c7dae RS |
1371 | /* We have copied text into the gap, but we have not marked |
1372 | it as part of the buffer. So we can use the old FROM and FROM_BYTE | |
1373 | here, for both the previous text and the following text. | |
1374 | Meanwhile, GPT_ADDR does point to | |
432f78d2 | 1375 | the text that has been stored by copy_text. */ |
b16afa45 KH |
1376 | if (count_combining_before (GPT_ADDR, outgoing_insbytes, from, from_byte) |
1377 | || count_combining_after (GPT_ADDR, outgoing_insbytes, from, from_byte)) | |
1378 | abort (); | |
1379 | #endif | |
432f78d2 | 1380 | |
4b4deea2 | 1381 | if (! EQ (BVAR (current_buffer, undo_list), Qt)) |
23b20a70 | 1382 | { |
bec1aca2 RS |
1383 | /* Record the insertion first, so that when we undo, |
1384 | the deletion will be undone first. Thus, undo | |
1385 | will insert before deleting, and thus will keep | |
1386 | the markers before and after this text separate. */ | |
1387 | record_insert (from + SCHARS (deletion), inschars); | |
b16afa45 | 1388 | record_delete (from, deletion); |
23b20a70 | 1389 | } |
c5ca4d3a | 1390 | |
1f90a790 RS |
1391 | GAP_SIZE -= outgoing_insbytes; |
1392 | GPT += inschars; | |
1393 | ZV += inschars; | |
1394 | Z += inschars; | |
1395 | GPT_BYTE += outgoing_insbytes; | |
1396 | ZV_BYTE += outgoing_insbytes; | |
1397 | Z_BYTE += outgoing_insbytes; | |
c5ca4d3a RS |
1398 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
1399 | ||
e2688e4a | 1400 | eassert (GPT <= GPT_BYTE); |
3be11131 | 1401 | |
c5ca4d3a RS |
1402 | /* Adjust the overlay center as needed. This must be done after |
1403 | adjusting the markers that bound the overlays. */ | |
3be11131 | 1404 | adjust_overlays_for_delete (from, nchars_del); |
1f90a790 | 1405 | adjust_overlays_for_insert (from, inschars); |
048a0fbb RS |
1406 | |
1407 | /* Adjust markers for the deletion and the insertion. */ | |
60aa777a | 1408 | if (markers) |
048a0fbb RS |
1409 | adjust_markers_for_replace (from, from_byte, nchars_del, nbytes_del, |
1410 | inschars, outgoing_insbytes); | |
c5ca4d3a | 1411 | |
255c7dae | 1412 | offset_intervals (current_buffer, from, inschars - nchars_del); |
ce97a2d7 RS |
1413 | |
1414 | /* Get the intervals for the part of the string we are inserting-- | |
1415 | not including the combined-before bytes. */ | |
d5db4077 | 1416 | intervals = STRING_INTERVALS (new); |
ce97a2d7 | 1417 | /* Insert those intervals. */ |
1f90a790 | 1418 | graft_intervals_into_buffer (intervals, from, inschars, |
ce97a2d7 | 1419 | current_buffer, inherit); |
c5ca4d3a | 1420 | |
1f90a790 RS |
1421 | /* Relocate point as if it were a marker. */ |
1422 | if (from < PT) | |
8bedbe9d | 1423 | adjust_point ((from + inschars - (PT < to ? PT : to)), |
1f90a790 | 1424 | (from_byte + outgoing_insbytes |
8bedbe9d | 1425 | - (PT_BYTE < to_byte ? PT_BYTE : to_byte))); |
c5ca4d3a | 1426 | |
1f90a790 RS |
1427 | if (outgoing_insbytes == 0) |
1428 | evaporate_overlays (from); | |
93b882e8 | 1429 | |
e2688e4a | 1430 | check_markers (); |
60ea6052 | 1431 | |
c5ca4d3a | 1432 | MODIFF++; |
3e145152 | 1433 | CHARS_MODIFF = MODIFF; |
c5ca4d3a RS |
1434 | UNGCPRO; |
1435 | ||
255c7dae | 1436 | signal_after_change (from, nchars_del, GPT - from); |
0ef71121 | 1437 | update_compositions (from, GPT, CHECK_BORDER); |
c5ca4d3a RS |
1438 | } |
1439 | \f | |
085db7de RS |
1440 | /* Replace the text from character positions FROM to TO with |
1441 | the text in INS of length INSCHARS. | |
1442 | Keep the text properties that applied to the old characters | |
1443 | (extending them to all the new chars if there are more new chars). | |
1444 | ||
1445 | Note that this does not yet handle markers quite right. | |
1446 | ||
1447 | If MARKERS is nonzero, relocate markers. | |
1448 | ||
1449 | Unlike most functions at this level, never call | |
1450 | prepare_to_modify_buffer and never call signal_after_change. */ | |
1451 | ||
1452 | void | |
d311d28c PE |
1453 | replace_range_2 (ptrdiff_t from, ptrdiff_t from_byte, |
1454 | ptrdiff_t to, ptrdiff_t to_byte, | |
1455 | const char *ins, ptrdiff_t inschars, ptrdiff_t insbytes, | |
ae19ba7c | 1456 | int markers) |
085db7de | 1457 | { |
d311d28c | 1458 | ptrdiff_t nbytes_del, nchars_del; |
085db7de | 1459 | |
e2688e4a | 1460 | check_markers (); |
085db7de RS |
1461 | |
1462 | nchars_del = to - from; | |
1463 | nbytes_del = to_byte - from_byte; | |
1464 | ||
1465 | if (nbytes_del <= 0 && insbytes == 0) | |
1466 | return; | |
1467 | ||
085db7de RS |
1468 | /* Make sure the gap is somewhere in or next to what we are deleting. */ |
1469 | if (from > GPT) | |
1470 | gap_right (from, from_byte); | |
1471 | if (to < GPT) | |
1472 | gap_left (to, to_byte, 0); | |
1473 | ||
1474 | GAP_SIZE += nbytes_del; | |
1475 | ZV -= nchars_del; | |
1476 | Z -= nchars_del; | |
1477 | ZV_BYTE -= nbytes_del; | |
1478 | Z_BYTE -= nbytes_del; | |
1479 | GPT = from; | |
1480 | GPT_BYTE = from_byte; | |
1481 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ | |
1482 | ||
e2688e4a | 1483 | eassert (GPT <= GPT_BYTE); |
085db7de RS |
1484 | |
1485 | if (GPT - BEG < BEG_UNCHANGED) | |
1486 | BEG_UNCHANGED = GPT - BEG; | |
1487 | if (Z - GPT < END_UNCHANGED) | |
1488 | END_UNCHANGED = Z - GPT; | |
1489 | ||
1490 | if (GAP_SIZE < insbytes) | |
1491 | make_gap (insbytes - GAP_SIZE); | |
1492 | ||
1493 | /* Copy the replacement text into the buffer. */ | |
72af86bd | 1494 | memcpy (GPT_ADDR, ins, insbytes); |
085db7de RS |
1495 | |
1496 | #ifdef BYTE_COMBINING_DEBUG | |
1497 | /* We have copied text into the gap, but we have not marked | |
1498 | it as part of the buffer. So we can use the old FROM and FROM_BYTE | |
1499 | here, for both the previous text and the following text. | |
1500 | Meanwhile, GPT_ADDR does point to | |
1501 | the text that has been stored by copy_text. */ | |
1502 | if (count_combining_before (GPT_ADDR, insbytes, from, from_byte) | |
1503 | || count_combining_after (GPT_ADDR, insbytes, from, from_byte)) | |
1504 | abort (); | |
1505 | #endif | |
1506 | ||
1507 | GAP_SIZE -= insbytes; | |
1508 | GPT += inschars; | |
1509 | ZV += inschars; | |
1510 | Z += inschars; | |
1511 | GPT_BYTE += insbytes; | |
1512 | ZV_BYTE += insbytes; | |
1513 | Z_BYTE += insbytes; | |
1514 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ | |
1515 | ||
e2688e4a | 1516 | eassert (GPT <= GPT_BYTE); |
085db7de RS |
1517 | |
1518 | /* Adjust the overlay center as needed. This must be done after | |
1519 | adjusting the markers that bound the overlays. */ | |
1520 | if (nchars_del != inschars) | |
1521 | { | |
1522 | adjust_overlays_for_insert (from, inschars); | |
1523 | adjust_overlays_for_delete (from + inschars, nchars_del); | |
1524 | } | |
1525 | ||
1526 | /* Adjust markers for the deletion and the insertion. */ | |
1527 | if (markers | |
7077904e | 1528 | && ! (nchars_del == 1 && inschars == 1 && nbytes_del == insbytes)) |
085db7de RS |
1529 | adjust_markers_for_replace (from, from_byte, nchars_del, nbytes_del, |
1530 | inschars, insbytes); | |
1531 | ||
1532 | offset_intervals (current_buffer, from, inschars - nchars_del); | |
1533 | ||
1534 | /* Relocate point as if it were a marker. */ | |
7077904e KH |
1535 | if (from < PT && (nchars_del != inschars || nbytes_del != insbytes)) |
1536 | { | |
1537 | if (PT < to) | |
1538 | /* PT was within the deleted text. Move it to FROM. */ | |
1539 | adjust_point (from - PT, from_byte - PT_BYTE); | |
1540 | else | |
1541 | adjust_point (inschars - nchars_del, insbytes - nbytes_del); | |
1542 | } | |
085db7de RS |
1543 | |
1544 | if (insbytes == 0) | |
1545 | evaporate_overlays (from); | |
1546 | ||
e2688e4a | 1547 | check_markers (); |
085db7de RS |
1548 | |
1549 | MODIFF++; | |
3e145152 | 1550 | CHARS_MODIFF = MODIFF; |
085db7de RS |
1551 | } |
1552 | \f | |
b45433b3 | 1553 | /* Delete characters in current buffer |
3be11131 RS |
1554 | from FROM up to (but not including) TO. |
1555 | If TO comes before FROM, we delete nothing. */ | |
b45433b3 | 1556 | |
c660b094 | 1557 | void |
d311d28c | 1558 | del_range (ptrdiff_t from, ptrdiff_t to) |
47c64747 | 1559 | { |
7dae4502 | 1560 | del_range_1 (from, to, 1, 0); |
47c64747 RS |
1561 | } |
1562 | ||
7dae4502 SM |
1563 | /* Like del_range; PREPARE says whether to call prepare_to_modify_buffer. |
1564 | RET_STRING says to return the deleted text. */ | |
47c64747 | 1565 | |
7dae4502 | 1566 | Lisp_Object |
d311d28c | 1567 | del_range_1 (ptrdiff_t from, ptrdiff_t to, int prepare, int ret_string) |
b45433b3 | 1568 | { |
d311d28c | 1569 | ptrdiff_t from_byte, to_byte; |
7dae4502 SM |
1570 | Lisp_Object deletion; |
1571 | struct gcpro gcpro1; | |
3be11131 RS |
1572 | |
1573 | /* Make args be valid */ | |
1574 | if (from < BEGV) | |
1575 | from = BEGV; | |
1576 | if (to > ZV) | |
1577 | to = ZV; | |
1578 | ||
1579 | if (to <= from) | |
7dae4502 | 1580 | return Qnil; |
3be11131 RS |
1581 | |
1582 | if (prepare) | |
1583 | { | |
d311d28c | 1584 | ptrdiff_t range_length = to - from; |
3be11131 | 1585 | prepare_to_modify_buffer (from, to, &from); |
0a411995 | 1586 | to = min (ZV, from + range_length); |
3be11131 RS |
1587 | } |
1588 | ||
1589 | from_byte = CHAR_TO_BYTE (from); | |
1590 | to_byte = CHAR_TO_BYTE (to); | |
1591 | ||
7dae4502 | 1592 | deletion = del_range_2 (from, from_byte, to, to_byte, ret_string); |
5e617bc2 | 1593 | GCPRO1 (deletion); |
9c36993a | 1594 | signal_after_change (from, to - from, 0); |
233cc02d | 1595 | update_compositions (from, from, CHECK_HEAD); |
7dae4502 SM |
1596 | UNGCPRO; |
1597 | return deletion; | |
3be11131 RS |
1598 | } |
1599 | ||
1600 | /* Like del_range_1 but args are byte positions, not char positions. */ | |
1601 | ||
1602 | void | |
d311d28c | 1603 | del_range_byte (ptrdiff_t from_byte, ptrdiff_t to_byte, int prepare) |
3be11131 | 1604 | { |
d311d28c | 1605 | ptrdiff_t from, to; |
3be11131 RS |
1606 | |
1607 | /* Make args be valid */ | |
1608 | if (from_byte < BEGV_BYTE) | |
1609 | from_byte = BEGV_BYTE; | |
1610 | if (to_byte > ZV_BYTE) | |
1611 | to_byte = ZV_BYTE; | |
1612 | ||
1613 | if (to_byte <= from_byte) | |
1614 | return; | |
1615 | ||
1616 | from = BYTE_TO_CHAR (from_byte); | |
1617 | to = BYTE_TO_CHAR (to_byte); | |
b45433b3 | 1618 | |
d206af14 RS |
1619 | if (prepare) |
1620 | { | |
d311d28c PE |
1621 | ptrdiff_t old_from = from, old_to = Z - to; |
1622 | ptrdiff_t range_length = to - from; | |
d206af14 RS |
1623 | prepare_to_modify_buffer (from, to, &from); |
1624 | to = from + range_length; | |
3be11131 RS |
1625 | |
1626 | if (old_from != from) | |
1627 | from_byte = CHAR_TO_BYTE (from); | |
0a411995 GM |
1628 | if (to > ZV) |
1629 | { | |
1630 | to = ZV; | |
1631 | to_byte = ZV_BYTE; | |
1632 | } | |
1633 | else if (old_to == Z - to) | |
3be11131 | 1634 | to_byte = CHAR_TO_BYTE (to); |
d206af14 RS |
1635 | } |
1636 | ||
7dae4502 | 1637 | del_range_2 (from, from_byte, to, to_byte, 0); |
9c36993a | 1638 | signal_after_change (from, to - from, 0); |
0ef71121 | 1639 | update_compositions (from, from, CHECK_HEAD); |
3be11131 RS |
1640 | } |
1641 | ||
1642 | /* Like del_range_1, but positions are specified both as charpos | |
1643 | and bytepos. */ | |
1644 | ||
1645 | void | |
d311d28c PE |
1646 | del_range_both (ptrdiff_t from, ptrdiff_t from_byte, |
1647 | ptrdiff_t to, ptrdiff_t to_byte, int prepare) | |
3be11131 | 1648 | { |
b45433b3 | 1649 | /* Make args be valid */ |
3be11131 RS |
1650 | if (from_byte < BEGV_BYTE) |
1651 | from_byte = BEGV_BYTE; | |
1652 | if (to_byte > ZV_BYTE) | |
1653 | to_byte = ZV_BYTE; | |
1654 | ||
1655 | if (to_byte <= from_byte) | |
1656 | return; | |
1657 | ||
b45433b3 JB |
1658 | if (from < BEGV) |
1659 | from = BEGV; | |
1660 | if (to > ZV) | |
1661 | to = ZV; | |
1662 | ||
3be11131 RS |
1663 | if (prepare) |
1664 | { | |
d311d28c PE |
1665 | ptrdiff_t old_from = from, old_to = Z - to; |
1666 | ptrdiff_t range_length = to - from; | |
3be11131 RS |
1667 | prepare_to_modify_buffer (from, to, &from); |
1668 | to = from + range_length; | |
1669 | ||
1670 | if (old_from != from) | |
1671 | from_byte = CHAR_TO_BYTE (from); | |
0a411995 GM |
1672 | if (to > ZV) |
1673 | { | |
1674 | to = ZV; | |
1675 | to_byte = ZV_BYTE; | |
1676 | } | |
1677 | else if (old_to == Z - to) | |
3be11131 RS |
1678 | to_byte = CHAR_TO_BYTE (to); |
1679 | } | |
1680 | ||
7dae4502 | 1681 | del_range_2 (from, from_byte, to, to_byte, 0); |
9c36993a | 1682 | signal_after_change (from, to - from, 0); |
0ef71121 | 1683 | update_compositions (from, from, CHECK_HEAD); |
3be11131 RS |
1684 | } |
1685 | ||
1686 | /* Delete a range of text, specified both as character positions | |
1687 | and byte positions. FROM and TO are character positions, | |
7dae4502 SM |
1688 | while FROM_BYTE and TO_BYTE are byte positions. |
1689 | If RET_STRING is true, the deleted area is returned as a string. */ | |
3be11131 | 1690 | |
7dae4502 | 1691 | Lisp_Object |
d311d28c PE |
1692 | del_range_2 (ptrdiff_t from, ptrdiff_t from_byte, |
1693 | ptrdiff_t to, ptrdiff_t to_byte, int ret_string) | |
3be11131 | 1694 | { |
d311d28c | 1695 | register ptrdiff_t nbytes_del, nchars_del; |
628cea90 | 1696 | Lisp_Object deletion; |
3be11131 | 1697 | |
e2688e4a | 1698 | check_markers (); |
60ea6052 | 1699 | |
3be11131 RS |
1700 | nchars_del = to - from; |
1701 | nbytes_del = to_byte - from_byte; | |
b45433b3 JB |
1702 | |
1703 | /* Make sure the gap is somewhere in or next to what we are deleting. */ | |
1704 | if (from > GPT) | |
3be11131 | 1705 | gap_right (from, from_byte); |
b45433b3 | 1706 | if (to < GPT) |
3be11131 | 1707 | gap_left (to, to_byte, 0); |
b45433b3 | 1708 | |
b16afa45 KH |
1709 | #ifdef BYTE_COMBINING_DEBUG |
1710 | if (count_combining_before (BUF_BYTE_ADDRESS (current_buffer, to_byte), | |
1711 | Z_BYTE - to_byte, from, from_byte)) | |
1712 | abort (); | |
1713 | #endif | |
628cea90 | 1714 | |
4b4deea2 | 1715 | if (ret_string || ! EQ (BVAR (current_buffer, undo_list), Qt)) |
b16afa45 | 1716 | deletion = make_buffer_string_both (from, from_byte, to, to_byte, 1); |
7dae4502 SM |
1717 | else |
1718 | deletion = Qnil; | |
1719 | ||
8948d317 RS |
1720 | /* Relocate all markers pointing into the new, larger gap |
1721 | to point at the end of the text before the gap. | |
3be11131 RS |
1722 | Do this before recording the deletion, |
1723 | so that undo handles this after reinserting the text. */ | |
1724 | adjust_markers_for_delete (from, from_byte, to, to_byte); | |
b16afa45 | 1725 | |
4b4deea2 | 1726 | if (! EQ (BVAR (current_buffer, undo_list), Qt)) |
b16afa45 | 1727 | record_delete (from, deletion); |
be09561e | 1728 | MODIFF++; |
3e145152 | 1729 | CHARS_MODIFF = MODIFF; |
be09561e | 1730 | |
b45433b3 | 1731 | /* Relocate point as if it were a marker. */ |
2bcaed71 | 1732 | if (from < PT) |
3be11131 RS |
1733 | adjust_point (from - (PT < to ? PT : to), |
1734 | from_byte - (PT_BYTE < to_byte ? PT_BYTE : to_byte)); | |
b45433b3 | 1735 | |
3be11131 | 1736 | offset_intervals (current_buffer, from, - nchars_del); |
16032db6 | 1737 | |
adde4858 | 1738 | /* Adjust the overlay center as needed. This must be done after |
a7f38d28 | 1739 | adjusting the markers that bound the overlays. */ |
e3a87305 | 1740 | adjust_overlays_for_delete (from, nchars_del); |
adde4858 | 1741 | |
3be11131 RS |
1742 | GAP_SIZE += nbytes_del; |
1743 | ZV_BYTE -= nbytes_del; | |
1744 | Z_BYTE -= nbytes_del; | |
1745 | ZV -= nchars_del; | |
1746 | Z -= nchars_del; | |
b45433b3 | 1747 | GPT = from; |
3be11131 | 1748 | GPT_BYTE = from_byte; |
b3b58c01 AS |
1749 | if (GAP_SIZE > 0 && !current_buffer->text->inhibit_shrinking) |
1750 | /* Put an anchor, unless called from decode_coding_object which | |
1751 | needs to access the previous gap contents. */ | |
1752 | *(GPT_ADDR) = 0; | |
e3a87305 | 1753 | |
e2688e4a | 1754 | eassert (GPT <= GPT_BYTE); |
3be11131 | 1755 | |
a50df55b GM |
1756 | if (GPT - BEG < BEG_UNCHANGED) |
1757 | BEG_UNCHANGED = GPT - BEG; | |
1758 | if (Z - GPT < END_UNCHANGED) | |
1759 | END_UNCHANGED = Z - GPT; | |
b45433b3 | 1760 | |
e2688e4a | 1761 | check_markers (); |
60ea6052 | 1762 | |
d386034e | 1763 | evaporate_overlays (from); |
7dae4502 SM |
1764 | |
1765 | return deletion; | |
b45433b3 JB |
1766 | } |
1767 | \f | |
3be11131 RS |
1768 | /* Call this if you're about to change the region of BUFFER from |
1769 | character positions START to END. This checks the read-only | |
1770 | properties of the region, calls the necessary modification hooks, | |
1771 | and warns the next redisplay that it should pay attention to that | |
3e145152 CY |
1772 | area. |
1773 | ||
1774 | If PRESERVE_CHARS_MODIFF is non-zero, do not update CHARS_MODIFF. | |
1775 | Otherwise set CHARS_MODIFF to the new value of MODIFF. */ | |
3be11131 | 1776 | |
c660b094 | 1777 | void |
d311d28c | 1778 | modify_region (struct buffer *buffer, ptrdiff_t start, ptrdiff_t end, |
ae19ba7c | 1779 | int preserve_chars_modiff) |
b45433b3 | 1780 | { |
04a759c8 JB |
1781 | struct buffer *old_buffer = current_buffer; |
1782 | ||
1783 | if (buffer != old_buffer) | |
1784 | set_buffer_internal (buffer); | |
1785 | ||
d206af14 | 1786 | prepare_to_modify_buffer (start, end, NULL); |
b45433b3 | 1787 | |
a50df55b | 1788 | BUF_COMPUTE_UNCHANGED (buffer, start - 1, end); |
83010cd6 | 1789 | |
9fbf87cd | 1790 | if (MODIFF <= SAVE_MODIFF) |
83010cd6 | 1791 | record_first_change (); |
b45433b3 | 1792 | MODIFF++; |
3e145152 CY |
1793 | if (! preserve_chars_modiff) |
1794 | CHARS_MODIFF = MODIFF; | |
04a759c8 | 1795 | |
4b4deea2 | 1796 | BVAR (buffer, point_before_scroll) = Qnil; |
069cdc4f | 1797 | |
04a759c8 JB |
1798 | if (buffer != old_buffer) |
1799 | set_buffer_internal (old_buffer); | |
b45433b3 | 1800 | } |
d206af14 | 1801 | \f |
3be11131 RS |
1802 | /* Check that it is okay to modify the buffer between START and END, |
1803 | which are char positions. | |
1804 | ||
679194a6 JA |
1805 | Run the before-change-function, if any. If intervals are in use, |
1806 | verify that the text to be modified is not read-only, and call | |
d206af14 RS |
1807 | any modification properties the text may have. |
1808 | ||
1809 | If PRESERVE_PTR is nonzero, we relocate *PRESERVE_PTR | |
1810 | by holding its value temporarily in a marker. */ | |
b45433b3 | 1811 | |
c660b094 | 1812 | void |
d311d28c PE |
1813 | prepare_to_modify_buffer (ptrdiff_t start, ptrdiff_t end, |
1814 | ptrdiff_t *preserve_ptr) | |
b45433b3 | 1815 | { |
234fb773 CY |
1816 | struct buffer *base_buffer; |
1817 | ||
4b4deea2 | 1818 | if (!NILP (BVAR (current_buffer, read_only))) |
b45433b3 JB |
1819 | Fbarf_if_buffer_read_only (); |
1820 | ||
2e9f55fd GM |
1821 | /* Let redisplay consider other windows than selected_window |
1822 | if modifying another buffer. */ | |
077288cf | 1823 | if (XBUFFER (WGET (XWINDOW (selected_window), buffer)) != current_buffer) |
2e9f55fd GM |
1824 | ++windows_or_buffers_changed; |
1825 | ||
9fbf87cd | 1826 | if (BUF_INTERVALS (current_buffer) != 0) |
d206af14 RS |
1827 | { |
1828 | if (preserve_ptr) | |
1829 | { | |
1830 | Lisp_Object preserve_marker; | |
1831 | struct gcpro gcpro1; | |
1832 | preserve_marker = Fcopy_marker (make_number (*preserve_ptr), Qnil); | |
1833 | GCPRO1 (preserve_marker); | |
1834 | verify_interval_modification (current_buffer, start, end); | |
1835 | *preserve_ptr = marker_position (preserve_marker); | |
dab0b04d | 1836 | unchain_marker (XMARKER (preserve_marker)); |
d206af14 RS |
1837 | UNGCPRO; |
1838 | } | |
1839 | else | |
1840 | verify_interval_modification (current_buffer, start, end); | |
1841 | } | |
b45433b3 | 1842 | |
234fb773 CY |
1843 | /* For indirect buffers, use the base buffer to check clashes. */ |
1844 | if (current_buffer->base_buffer != 0) | |
1845 | base_buffer = current_buffer->base_buffer; | |
1846 | else | |
1847 | base_buffer = current_buffer; | |
1848 | ||
b45433b3 | 1849 | #ifdef CLASH_DETECTION |
4b4deea2 | 1850 | if (!NILP (BVAR (base_buffer, file_truename)) |
ab6c5c0c | 1851 | /* Make binding buffer-file-name to nil effective. */ |
4b4deea2 | 1852 | && !NILP (BVAR (base_buffer, filename)) |
9fbf87cd | 1853 | && SAVE_MODIFF >= MODIFF) |
4b4deea2 | 1854 | lock_file (BVAR (base_buffer, file_truename)); |
b45433b3 JB |
1855 | #else |
1856 | /* At least warn if this file has changed on disk since it was visited. */ | |
4b4deea2 | 1857 | if (!NILP (BVAR (base_buffer, filename)) |
9fbf87cd | 1858 | && SAVE_MODIFF >= MODIFF |
d427b66a | 1859 | && NILP (Fverify_visited_file_modtime (Fcurrent_buffer ())) |
4b4deea2 | 1860 | && !NILP (Ffile_exists_p (BVAR (base_buffer, filename)))) |
b45433b3 | 1861 | call1 (intern ("ask-user-about-supersession-threat"), |
4b4deea2 | 1862 | BVAR (base_buffer,filename)); |
b45433b3 JB |
1863 | #endif /* not CLASH_DETECTION */ |
1864 | ||
9852377f | 1865 | /* If `select-active-regions' is non-nil, save the region text. */ |
4b4deea2 | 1866 | if (!NILP (BVAR (current_buffer, mark_active)) |
8b78d5e3 | 1867 | && !inhibit_modification_hooks |
4b4deea2 | 1868 | && XMARKER (BVAR (current_buffer, mark))->buffer |
7c23dd44 CY |
1869 | && NILP (Vsaved_region_selection) |
1870 | && (EQ (Vselect_active_regions, Qonly) | |
1871 | ? EQ (CAR_SAFE (Vtransient_mark_mode), Qonly) | |
1872 | : (!NILP (Vselect_active_regions) | |
1873 | && !NILP (Vtransient_mark_mode)))) | |
9852377f | 1874 | { |
d311d28c PE |
1875 | ptrdiff_t b = XMARKER (BVAR (current_buffer, mark))->charpos; |
1876 | ptrdiff_t e = PT; | |
746812d9 CY |
1877 | if (b < e) |
1878 | Vsaved_region_selection = make_buffer_string (b, e, 0); | |
1879 | else if (b > e) | |
1880 | Vsaved_region_selection = make_buffer_string (e, b, 0); | |
9852377f CY |
1881 | } |
1882 | ||
d206af14 | 1883 | signal_before_change (start, end, preserve_ptr); |
2f545eea | 1884 | |
56e1065e JB |
1885 | if (current_buffer->newline_cache) |
1886 | invalidate_region_cache (current_buffer, | |
1887 | current_buffer->newline_cache, | |
1888 | start - BEG, Z - end); | |
1889 | if (current_buffer->width_run_cache) | |
1890 | invalidate_region_cache (current_buffer, | |
1891 | current_buffer->width_run_cache, | |
1892 | start - BEG, Z - end); | |
1893 | ||
2f545eea | 1894 | Vdeactivate_mark = Qt; |
b45433b3 JB |
1895 | } |
1896 | \f | |
d206af14 RS |
1897 | /* These macros work with an argument named `preserve_ptr' |
1898 | and a local variable named `preserve_marker'. */ | |
1899 | ||
1900 | #define PRESERVE_VALUE \ | |
1901 | if (preserve_ptr && NILP (preserve_marker)) \ | |
1902 | preserve_marker = Fcopy_marker (make_number (*preserve_ptr), Qnil) | |
1903 | ||
1904 | #define RESTORE_VALUE \ | |
1905 | if (! NILP (preserve_marker)) \ | |
1906 | { \ | |
1907 | *preserve_ptr = marker_position (preserve_marker); \ | |
dab0b04d | 1908 | unchain_marker (XMARKER (preserve_marker)); \ |
d206af14 RS |
1909 | } |
1910 | ||
b86e0aaf RS |
1911 | #define PRESERVE_START_END \ |
1912 | if (NILP (start_marker)) \ | |
1913 | start_marker = Fcopy_marker (start, Qnil); \ | |
1914 | if (NILP (end_marker)) \ | |
1915 | end_marker = Fcopy_marker (end, Qnil); | |
1916 | ||
1917 | #define FETCH_START \ | |
1918 | (! NILP (start_marker) ? Fmarker_position (start_marker) : start) | |
1919 | ||
1920 | #define FETCH_END \ | |
1921 | (! NILP (end_marker) ? Fmarker_position (end_marker) : end) | |
1922 | ||
4a181359 | 1923 | /* Set a variable to nil if an error occurred. |
e6d3f090 SM |
1924 | Don't change the variable if there was no error. |
1925 | VAL is a cons-cell (VARIABLE . NO-ERROR-FLAG). | |
1926 | VARIABLE is the variable to maybe set to nil. | |
1927 | NO-ERROR-FLAG is nil if there was an error, | |
1928 | anything else meaning no error (so this function does nothing). */ | |
85876d07 | 1929 | static Lisp_Object |
971de7fb | 1930 | reset_var_on_error (Lisp_Object val) |
4a181359 SM |
1931 | { |
1932 | if (NILP (XCDR (val))) | |
1933 | Fset (XCAR (val), Qnil); | |
1934 | return Qnil; | |
1935 | } | |
1936 | ||
eb8c3be9 | 1937 | /* Signal a change to the buffer immediately before it happens. |
d206af14 RS |
1938 | START_INT and END_INT are the bounds of the text to be changed. |
1939 | ||
1940 | If PRESERVE_PTR is nonzero, we relocate *PRESERVE_PTR | |
1941 | by holding its value temporarily in a marker. */ | |
b45433b3 | 1942 | |
4889fc82 | 1943 | static void |
d311d28c PE |
1944 | signal_before_change (ptrdiff_t start_int, ptrdiff_t end_int, |
1945 | ptrdiff_t *preserve_ptr) | |
b45433b3 | 1946 | { |
fb4ee5cd | 1947 | Lisp_Object start, end; |
b86e0aaf | 1948 | Lisp_Object start_marker, end_marker; |
d206af14 | 1949 | Lisp_Object preserve_marker; |
b86e0aaf | 1950 | struct gcpro gcpro1, gcpro2, gcpro3; |
d311d28c | 1951 | ptrdiff_t count = SPECPDL_INDEX (); |
fb4ee5cd | 1952 | |
fd16a4c6 KH |
1953 | if (inhibit_modification_hooks) |
1954 | return; | |
1955 | ||
fb4ee5cd RS |
1956 | start = make_number (start_int); |
1957 | end = make_number (end_int); | |
d206af14 | 1958 | preserve_marker = Qnil; |
b86e0aaf RS |
1959 | start_marker = Qnil; |
1960 | end_marker = Qnil; | |
1961 | GCPRO3 (preserve_marker, start_marker, end_marker); | |
fb4ee5cd | 1962 | |
4a181359 SM |
1963 | specbind (Qinhibit_modification_hooks, Qt); |
1964 | ||
dee091a3 JD |
1965 | /* If buffer is unmodified, run a special hook for that case. The |
1966 | check for Vfirst_change_hook is just a minor optimization. */ | |
9fbf87cd | 1967 | if (SAVE_MODIFF >= MODIFF |
dee091a3 | 1968 | && !NILP (Vfirst_change_hook)) |
d206af14 RS |
1969 | { |
1970 | PRESERVE_VALUE; | |
b86e0aaf | 1971 | PRESERVE_START_END; |
dee091a3 | 1972 | Frun_hooks (1, &Qfirst_change_hook); |
d206af14 | 1973 | } |
dbc4e1c1 | 1974 | |
3d1e2d9c | 1975 | /* Now run the before-change-functions if any. */ |
e45fb8bf RS |
1976 | if (!NILP (Vbefore_change_functions)) |
1977 | { | |
3d1e2d9c | 1978 | Lisp_Object args[3]; |
4a181359 | 1979 | Lisp_Object rvoe_arg = Fcons (Qbefore_change_functions, Qnil); |
3d1e2d9c | 1980 | |
d206af14 | 1981 | PRESERVE_VALUE; |
b86e0aaf | 1982 | PRESERVE_START_END; |
d206af14 | 1983 | |
4a181359 SM |
1984 | /* Mark before-change-functions to be reset to nil in case of error. */ |
1985 | record_unwind_protect (reset_var_on_error, rvoe_arg); | |
3d1e2d9c RS |
1986 | |
1987 | /* Actually run the hook functions. */ | |
1988 | args[0] = Qbefore_change_functions; | |
b86e0aaf RS |
1989 | args[1] = FETCH_START; |
1990 | args[2] = FETCH_END; | |
4a181359 | 1991 | Frun_hook_with_args (3, args); |
3d1e2d9c | 1992 | |
4a181359 SM |
1993 | /* There was no error: unarm the reset_on_error. */ |
1994 | XSETCDR (rvoe_arg, Qt); | |
e45fb8bf | 1995 | } |
d07c0804 | 1996 | |
fbebdf81 | 1997 | if (current_buffer->overlays_before || current_buffer->overlays_after) |
d206af14 RS |
1998 | { |
1999 | PRESERVE_VALUE; | |
b86e0aaf RS |
2000 | report_overlay_modification (FETCH_START, FETCH_END, 0, |
2001 | FETCH_START, FETCH_END, Qnil); | |
d206af14 RS |
2002 | } |
2003 | ||
b86e0aaf RS |
2004 | if (! NILP (start_marker)) |
2005 | free_marker (start_marker); | |
2006 | if (! NILP (end_marker)) | |
2007 | free_marker (end_marker); | |
d206af14 RS |
2008 | RESTORE_VALUE; |
2009 | UNGCPRO; | |
4a181359 SM |
2010 | |
2011 | unbind_to (count, Qnil); | |
b45433b3 JB |
2012 | } |
2013 | ||
eb8c3be9 | 2014 | /* Signal a change immediately after it happens. |
3be11131 | 2015 | CHARPOS is the character position of the start of the changed text. |
b45433b3 JB |
2016 | LENDEL is the number of characters of the text before the change. |
2017 | (Not the whole buffer; just the part that was changed.) | |
8b09e5d0 RS |
2018 | LENINS is the number of characters in that part of the text |
2019 | after the change. */ | |
b45433b3 | 2020 | |
c660b094 | 2021 | void |
d311d28c | 2022 | signal_after_change (ptrdiff_t charpos, ptrdiff_t lendel, ptrdiff_t lenins) |
b45433b3 | 2023 | { |
d311d28c | 2024 | ptrdiff_t count = SPECPDL_INDEX (); |
fd16a4c6 KH |
2025 | if (inhibit_modification_hooks) |
2026 | return; | |
2027 | ||
fb2e7d14 RS |
2028 | /* If we are deferring calls to the after-change functions |
2029 | and there are no before-change functions, | |
2030 | just record the args that we were going to use. */ | |
2031 | if (! NILP (Vcombine_after_change_calls) | |
1675d086 | 2032 | && NILP (Vbefore_change_functions) |
fbebdf81 SM |
2033 | && !current_buffer->overlays_before |
2034 | && !current_buffer->overlays_after) | |
fb2e7d14 RS |
2035 | { |
2036 | Lisp_Object elt; | |
2037 | ||
2038 | if (!NILP (combine_after_change_list) | |
2039 | && current_buffer != XBUFFER (combine_after_change_buffer)) | |
2040 | Fcombine_after_change_execute (); | |
2041 | ||
3be11131 RS |
2042 | elt = Fcons (make_number (charpos - BEG), |
2043 | Fcons (make_number (Z - (charpos - lendel + lenins)), | |
fb2e7d14 RS |
2044 | Fcons (make_number (lenins - lendel), Qnil))); |
2045 | combine_after_change_list | |
2046 | = Fcons (elt, combine_after_change_list); | |
2047 | combine_after_change_buffer = Fcurrent_buffer (); | |
2048 | ||
2049 | return; | |
2050 | } | |
2051 | ||
177c0ea7 | 2052 | if (!NILP (combine_after_change_list)) |
fb2e7d14 RS |
2053 | Fcombine_after_change_execute (); |
2054 | ||
4a181359 SM |
2055 | specbind (Qinhibit_modification_hooks, Qt); |
2056 | ||
e45fb8bf RS |
2057 | if (!NILP (Vafter_change_functions)) |
2058 | { | |
3d1e2d9c | 2059 | Lisp_Object args[4]; |
4a181359 SM |
2060 | Lisp_Object rvoe_arg = Fcons (Qafter_change_functions, Qnil); |
2061 | ||
2062 | /* Mark after-change-functions to be reset to nil in case of error. */ | |
2063 | record_unwind_protect (reset_var_on_error, rvoe_arg); | |
3d1e2d9c RS |
2064 | |
2065 | /* Actually run the hook functions. */ | |
2066 | args[0] = Qafter_change_functions; | |
3be11131 RS |
2067 | XSETFASTINT (args[1], charpos); |
2068 | XSETFASTINT (args[2], charpos + lenins); | |
3d1e2d9c | 2069 | XSETFASTINT (args[3], lendel); |
4a181359 | 2070 | Frun_hook_with_args (4, args); |
3d1e2d9c | 2071 | |
4a181359 SM |
2072 | /* There was no error: unarm the reset_on_error. */ |
2073 | XSETCDR (rvoe_arg, Qt); | |
e45fb8bf | 2074 | } |
d07c0804 | 2075 | |
fbebdf81 | 2076 | if (current_buffer->overlays_before || current_buffer->overlays_after) |
3be11131 RS |
2077 | report_overlay_modification (make_number (charpos), |
2078 | make_number (charpos + lenins), | |
d07c0804 | 2079 | 1, |
3be11131 RS |
2080 | make_number (charpos), |
2081 | make_number (charpos + lenins), | |
d07c0804 | 2082 | make_number (lendel)); |
c5ca0786 RS |
2083 | |
2084 | /* After an insertion, call the text properties | |
2085 | insert-behind-hooks or insert-in-front-hooks. */ | |
2086 | if (lendel == 0) | |
d6b81c0f AS |
2087 | report_interval_modification (make_number (charpos), |
2088 | make_number (charpos + lenins)); | |
4a181359 SM |
2089 | |
2090 | unbind_to (count, Qnil); | |
b45433b3 | 2091 | } |
fb2e7d14 | 2092 | |
85876d07 | 2093 | static Lisp_Object |
971de7fb | 2094 | Fcombine_after_change_execute_1 (Lisp_Object val) |
fb2e7d14 RS |
2095 | { |
2096 | Vcombine_after_change_calls = val; | |
2097 | return val; | |
2098 | } | |
2099 | ||
2100 | DEFUN ("combine-after-change-execute", Fcombine_after_change_execute, | |
335c5470 PJ |
2101 | Scombine_after_change_execute, 0, 0, 0, |
2102 | doc: /* This function is for use internally in `combine-after-change-calls'. */) | |
5842a27b | 2103 | (void) |
fb2e7d14 | 2104 | { |
d311d28c PE |
2105 | ptrdiff_t count = SPECPDL_INDEX (); |
2106 | ptrdiff_t beg, end, change; | |
2107 | ptrdiff_t begpos, endpos; | |
fb2e7d14 RS |
2108 | Lisp_Object tail; |
2109 | ||
101e446f KH |
2110 | if (NILP (combine_after_change_list)) |
2111 | return Qnil; | |
2112 | ||
c47a9ed1 CY |
2113 | /* It is rare for combine_after_change_buffer to be invalid, but |
2114 | possible. It can happen when combine-after-change-calls is | |
2115 | non-nil, and insertion calls a file handler (e.g. through | |
2116 | lock_file) which scribbles into a temp file -- cyd */ | |
2117 | if (!BUFFERP (combine_after_change_buffer) | |
4b4deea2 | 2118 | || NILP (BVAR (XBUFFER (combine_after_change_buffer), name))) |
c47a9ed1 CY |
2119 | { |
2120 | combine_after_change_list = Qnil; | |
2121 | return Qnil; | |
2122 | } | |
2123 | ||
fb2e7d14 RS |
2124 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); |
2125 | ||
2126 | Fset_buffer (combine_after_change_buffer); | |
2127 | ||
2128 | /* # chars unchanged at beginning of buffer. */ | |
2129 | beg = Z - BEG; | |
2130 | /* # chars unchanged at end of buffer. */ | |
2131 | end = beg; | |
2132 | /* Total amount of insertion (negative for deletion). */ | |
2133 | change = 0; | |
2134 | ||
2135 | /* Scan the various individual changes, | |
2136 | accumulating the range info in BEG, END and CHANGE. */ | |
2137 | for (tail = combine_after_change_list; CONSP (tail); | |
03699b14 | 2138 | tail = XCDR (tail)) |
fb2e7d14 | 2139 | { |
e688a080 | 2140 | Lisp_Object elt; |
d311d28c | 2141 | ptrdiff_t thisbeg, thisend, thischange; |
fb2e7d14 RS |
2142 | |
2143 | /* Extract the info from the next element. */ | |
03699b14 | 2144 | elt = XCAR (tail); |
fb2e7d14 RS |
2145 | if (! CONSP (elt)) |
2146 | continue; | |
03699b14 | 2147 | thisbeg = XINT (XCAR (elt)); |
fb2e7d14 | 2148 | |
03699b14 | 2149 | elt = XCDR (elt); |
fb2e7d14 RS |
2150 | if (! CONSP (elt)) |
2151 | continue; | |
03699b14 | 2152 | thisend = XINT (XCAR (elt)); |
fb2e7d14 | 2153 | |
03699b14 | 2154 | elt = XCDR (elt); |
fb2e7d14 RS |
2155 | if (! CONSP (elt)) |
2156 | continue; | |
03699b14 | 2157 | thischange = XINT (XCAR (elt)); |
fb2e7d14 RS |
2158 | |
2159 | /* Merge this range into the accumulated range. */ | |
2160 | change += thischange; | |
2161 | if (thisbeg < beg) | |
2162 | beg = thisbeg; | |
2163 | if (thisend < end) | |
2164 | end = thisend; | |
2165 | } | |
2166 | ||
2167 | /* Get the current start and end positions of the range | |
2168 | that was changed. */ | |
2169 | begpos = BEG + beg; | |
2170 | endpos = Z - end; | |
177c0ea7 | 2171 | |
fb2e7d14 RS |
2172 | /* We are about to handle these, so discard them. */ |
2173 | combine_after_change_list = Qnil; | |
2174 | ||
2175 | /* Now run the after-change functions for real. | |
2176 | Turn off the flag that defers them. */ | |
2177 | record_unwind_protect (Fcombine_after_change_execute_1, | |
2178 | Vcombine_after_change_calls); | |
2179 | signal_after_change (begpos, endpos - begpos - change, endpos - begpos); | |
0ef71121 | 2180 | update_compositions (begpos, endpos, CHECK_ALL); |
fb2e7d14 | 2181 | |
101e446f | 2182 | return unbind_to (count, Qnil); |
fb2e7d14 RS |
2183 | } |
2184 | \f | |
dfcf069d | 2185 | void |
971de7fb | 2186 | syms_of_insdel (void) |
fb2e7d14 RS |
2187 | { |
2188 | staticpro (&combine_after_change_list); | |
bf0bf758 | 2189 | staticpro (&combine_after_change_buffer); |
fb2e7d14 | 2190 | combine_after_change_list = Qnil; |
101e446f | 2191 | combine_after_change_buffer = Qnil; |
fb2e7d14 | 2192 | |
29208e82 | 2193 | DEFVAR_LISP ("combine-after-change-calls", Vcombine_after_change_calls, |
335c5470 | 2194 | doc: /* Used internally by the `combine-after-change-calls' macro. */); |
fb2e7d14 RS |
2195 | Vcombine_after_change_calls = Qnil; |
2196 | ||
29208e82 | 2197 | DEFVAR_BOOL ("inhibit-modification-hooks", inhibit_modification_hooks, |
335c5470 PJ |
2198 | doc: /* Non-nil means don't run any of the hooks that respond to buffer changes. |
2199 | This affects `before-change-functions' and `after-change-functions', | |
2200 | as well as hooks attached to text properties and overlays. */); | |
7baf49cf | 2201 | inhibit_modification_hooks = 0; |
cd3520a4 | 2202 | DEFSYM (Qinhibit_modification_hooks, "inhibit-modification-hooks"); |
7baf49cf | 2203 | |
fb2e7d14 RS |
2204 | defsubr (&Scombine_after_change_execute); |
2205 | } |