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> |
06d6db33 PE |
22 | |
23 | #include <intprops.h> | |
24 | ||
b45433b3 | 25 | #include "lisp.h" |
679194a6 | 26 | #include "intervals.h" |
811f7370 | 27 | #include "character.h" |
e5560ff7 | 28 | #include "buffer.h" |
b45433b3 | 29 | #include "window.h" |
d014bf88 | 30 | #include "blockinput.h" |
dfcf069d | 31 | #include "region-cache.h" |
b45433b3 | 32 | |
a08d4ba7 PE |
33 | static void insert_from_string_1 (Lisp_Object, ptrdiff_t, ptrdiff_t, ptrdiff_t, |
34 | ptrdiff_t, bool, bool); | |
35 | static void insert_from_buffer_1 (struct buffer *, ptrdiff_t, ptrdiff_t, bool); | |
36 | static void gap_left (ptrdiff_t, ptrdiff_t, bool); | |
37 | static void gap_right (ptrdiff_t, ptrdiff_t); | |
395ec62e | 38 | |
fb2e7d14 RS |
39 | /* List of elements of the form (BEG-UNCHANGED END-UNCHANGED CHANGE-AMOUNT) |
40 | describing changes which happened while combine_after_change_calls | |
a08d4ba7 | 41 | was non-nil. We use this to decide how to call them |
fb2e7d14 RS |
42 | once the deferral ends. |
43 | ||
44 | In each element. | |
45 | BEG-UNCHANGED is the number of chars before the changed range. | |
46 | END-UNCHANGED is the number of chars after the changed range, | |
47 | and CHANGE-AMOUNT is the number of characters inserted by the change | |
48 | (negative for a deletion). */ | |
77382fcc | 49 | static Lisp_Object combine_after_change_list; |
fb2e7d14 RS |
50 | |
51 | /* Buffer which combine_after_change_list is about. */ | |
77382fcc | 52 | static Lisp_Object combine_after_change_buffer; |
27ea0af2 GM |
53 | |
54 | Lisp_Object Qinhibit_modification_hooks; | |
4889fc82 | 55 | |
d311d28c | 56 | static void signal_before_change (ptrdiff_t, ptrdiff_t, ptrdiff_t *); |
e2688e4a DA |
57 | |
58 | /* Also used in marker.c to enable expensive marker checks. */ | |
59 | ||
60 | #ifdef MARKER_DEBUG | |
60ea6052 | 61 | |
85876d07 | 62 | static void |
971de7fb | 63 | check_markers (void) |
60ea6052 | 64 | { |
a08d4ba7 PE |
65 | struct Lisp_Marker *tail; |
66 | bool multibyte = ! NILP (BVAR (current_buffer, enable_multibyte_characters)); | |
60ea6052 | 67 | |
dab0b04d | 68 | for (tail = BUF_MARKERS (current_buffer); tail; tail = tail->next) |
60ea6052 | 69 | { |
dab0b04d | 70 | if (tail->buffer->text != current_buffer->text) |
1088b922 | 71 | emacs_abort (); |
dab0b04d | 72 | if (tail->charpos > Z) |
1088b922 | 73 | emacs_abort (); |
dab0b04d | 74 | if (tail->bytepos > Z_BYTE) |
1088b922 | 75 | emacs_abort (); |
dab0b04d | 76 | if (multibyte && ! CHAR_HEAD_P (FETCH_BYTE (tail->bytepos))) |
1088b922 | 77 | emacs_abort (); |
60ea6052 RS |
78 | } |
79 | } | |
e2688e4a DA |
80 | |
81 | #else /* not MARKER_DEBUG */ | |
82 | ||
83 | #define check_markers() do { } while (0) | |
84 | ||
85 | #endif /* MARKER_DEBUG */ | |
86 | ||
3be11131 | 87 | /* Move gap to position CHARPOS. |
b45433b3 JB |
88 | Note that this can quit! */ |
89 | ||
c660b094 | 90 | void |
d311d28c | 91 | move_gap (ptrdiff_t charpos) |
b45433b3 | 92 | { |
3be11131 | 93 | move_gap_both (charpos, charpos_to_bytepos (charpos)); |
b45433b3 JB |
94 | } |
95 | ||
3be11131 RS |
96 | /* Move gap to byte position BYTEPOS, which is also char position CHARPOS. |
97 | Note that this can quit! */ | |
98 | ||
99 | void | |
d311d28c | 100 | move_gap_both (ptrdiff_t charpos, ptrdiff_t bytepos) |
3be11131 RS |
101 | { |
102 | if (bytepos < GPT_BYTE) | |
103 | gap_left (charpos, bytepos, 0); | |
104 | else if (bytepos > GPT_BYTE) | |
105 | gap_right (charpos, bytepos); | |
106 | } | |
107 | ||
108 | /* Move the gap to a position less than the current GPT. | |
109 | BYTEPOS describes the new position as a byte position, | |
110 | and CHARPOS is the corresponding char position. | |
a08d4ba7 | 111 | If NEWGAP, then don't update beg_unchanged and end_unchanged. */ |
b45433b3 | 112 | |
2bcaed71 | 113 | static void |
a08d4ba7 | 114 | gap_left (ptrdiff_t charpos, ptrdiff_t bytepos, bool newgap) |
b45433b3 | 115 | { |
a08d4ba7 PE |
116 | unsigned char *to, *from; |
117 | ptrdiff_t i; | |
d311d28c | 118 | ptrdiff_t new_s1; |
b45433b3 | 119 | |
b45433b3 | 120 | if (!newgap) |
a50df55b | 121 | BUF_COMPUTE_UNCHANGED (current_buffer, charpos, GPT); |
b45433b3 | 122 | |
3be11131 | 123 | i = GPT_BYTE; |
b45433b3 JB |
124 | to = GAP_END_ADDR; |
125 | from = GPT_ADDR; | |
3be11131 | 126 | new_s1 = GPT_BYTE; |
b45433b3 JB |
127 | |
128 | /* Now copy the characters. To move the gap down, | |
129 | copy characters up. */ | |
130 | ||
131 | while (1) | |
132 | { | |
133 | /* I gets number of characters left to copy. */ | |
3be11131 | 134 | i = new_s1 - bytepos; |
b45433b3 JB |
135 | if (i == 0) |
136 | break; | |
137 | /* If a quit is requested, stop copying now. | |
3be11131 | 138 | Change BYTEPOS to be where we have actually moved the gap to. */ |
b45433b3 JB |
139 | if (QUITP) |
140 | { | |
3be11131 RS |
141 | bytepos = new_s1; |
142 | charpos = BYTE_TO_CHAR (bytepos); | |
b45433b3 JB |
143 | break; |
144 | } | |
145 | /* Move at most 32000 chars before checking again for a quit. */ | |
146 | if (i > 32000) | |
147 | i = 32000; | |
72af86bd AS |
148 | new_s1 -= i; |
149 | from -= i, to -= i; | |
150 | memmove (to, from, i); | |
b45433b3 JB |
151 | } |
152 | ||
f868cd8a JB |
153 | /* Adjust buffer data structure, to put the gap at BYTEPOS. |
154 | BYTEPOS is where the loop above stopped, which may be what | |
155 | was specified or may be where a quit was detected. */ | |
3be11131 RS |
156 | GPT_BYTE = bytepos; |
157 | GPT = charpos; | |
e2688e4a | 158 | eassert (charpos <= bytepos); |
469ff680 | 159 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
b45433b3 JB |
160 | QUIT; |
161 | } | |
162 | ||
2b34df4e | 163 | /* Move the gap to a position greater than the current GPT. |
3be11131 RS |
164 | BYTEPOS describes the new position as a byte position, |
165 | and CHARPOS is the corresponding char position. */ | |
166 | ||
2bcaed71 | 167 | static void |
d311d28c | 168 | gap_right (ptrdiff_t charpos, ptrdiff_t bytepos) |
b45433b3 JB |
169 | { |
170 | register unsigned char *to, *from; | |
d311d28c PE |
171 | register ptrdiff_t i; |
172 | ptrdiff_t new_s1; | |
b45433b3 | 173 | |
a50df55b | 174 | BUF_COMPUTE_UNCHANGED (current_buffer, charpos, GPT); |
b45433b3 | 175 | |
3be11131 | 176 | i = GPT_BYTE; |
b45433b3 JB |
177 | from = GAP_END_ADDR; |
178 | to = GPT_ADDR; | |
3be11131 | 179 | new_s1 = GPT_BYTE; |
b45433b3 JB |
180 | |
181 | /* Now copy the characters. To move the gap up, | |
182 | copy characters down. */ | |
183 | ||
184 | while (1) | |
185 | { | |
186 | /* I gets number of characters left to copy. */ | |
3be11131 | 187 | i = bytepos - new_s1; |
b45433b3 JB |
188 | if (i == 0) |
189 | break; | |
190 | /* If a quit is requested, stop copying now. | |
3be11131 | 191 | Change BYTEPOS to be where we have actually moved the gap to. */ |
b45433b3 JB |
192 | if (QUITP) |
193 | { | |
3be11131 RS |
194 | bytepos = new_s1; |
195 | charpos = BYTE_TO_CHAR (bytepos); | |
b45433b3 JB |
196 | break; |
197 | } | |
198 | /* Move at most 32000 chars before checking again for a quit. */ | |
199 | if (i > 32000) | |
200 | i = 32000; | |
72af86bd AS |
201 | new_s1 += i; |
202 | memmove (to, from, i); | |
203 | from += i, to += i; | |
b45433b3 JB |
204 | } |
205 | ||
3be11131 RS |
206 | GPT = charpos; |
207 | GPT_BYTE = bytepos; | |
e2688e4a | 208 | eassert (charpos <= bytepos); |
469ff680 | 209 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
b45433b3 JB |
210 | QUIT; |
211 | } | |
2b083808 | 212 | \f |
3be11131 RS |
213 | /* Adjust all markers for a deletion |
214 | whose range in bytes is FROM_BYTE to TO_BYTE. | |
215 | The range in charpos is FROM to TO. | |
216 | ||
217 | This function assumes that the gap is adjacent to | |
218 | or inside of the range being deleted. */ | |
beecb55b | 219 | |
809f3d51 | 220 | void |
d311d28c PE |
221 | adjust_markers_for_delete (ptrdiff_t from, ptrdiff_t from_byte, |
222 | ptrdiff_t to, ptrdiff_t to_byte) | |
3be11131 RS |
223 | { |
224 | Lisp_Object marker; | |
225 | register struct Lisp_Marker *m; | |
d311d28c | 226 | register ptrdiff_t charpos; |
3be11131 | 227 | |
dab0b04d | 228 | for (m = BUF_MARKERS (current_buffer); m; m = m->next) |
3be11131 | 229 | { |
3be11131 | 230 | charpos = m->charpos; |
e2688e4a | 231 | eassert (charpos <= Z); |
3be11131 RS |
232 | |
233 | /* If the marker is after the deletion, | |
80f6e77c | 234 | relocate by number of chars / bytes deleted. */ |
3be11131 | 235 | if (charpos > to) |
80f6e77c RS |
236 | { |
237 | m->charpos -= to - from; | |
238 | m->bytepos -= to_byte - from_byte; | |
239 | } | |
80f6e77c | 240 | /* Here's the case where a marker is inside text being deleted. */ |
3be11131 RS |
241 | else if (charpos > from) |
242 | { | |
00de2987 | 243 | if (! m->insertion_type) |
dab0b04d | 244 | { /* Normal markers will end up at the beginning of the |
00de2987 | 245 | re-inserted text after undoing a deletion, and must be |
177c0ea7 | 246 | adjusted to move them to the correct place. */ |
dab0b04d | 247 | XSETMISC (marker, m); |
28259cac | 248 | record_marker_adjustment (marker, from - charpos); |
dab0b04d | 249 | } |
00de2987 | 250 | else if (charpos < to) |
dab0b04d | 251 | { /* Before-insertion markers will automatically move forward |
00de2987 MB |
252 | upon re-inserting the deleted text, so we have to arrange |
253 | for them to move backward to the correct position. */ | |
dab0b04d | 254 | XSETMISC (marker, m); |
28259cac | 255 | record_marker_adjustment (marker, to - charpos); |
dab0b04d | 256 | } |
3be11131 | 257 | m->charpos = from; |
80f6e77c | 258 | m->bytepos = from_byte; |
3be11131 | 259 | } |
00de2987 MB |
260 | /* Here's the case where a before-insertion marker is immediately |
261 | before the deleted region. */ | |
262 | else if (charpos == from && m->insertion_type) | |
263 | { | |
264 | /* Undoing the change uses normal insertion, which will | |
265 | incorrectly make MARKER move forward, so we arrange for it | |
266 | to then move backward to the correct place at the beginning | |
267 | of the deleted region. */ | |
dab0b04d | 268 | XSETMISC (marker, m); |
00de2987 MB |
269 | record_marker_adjustment (marker, to - from); |
270 | } | |
3be11131 RS |
271 | } |
272 | } | |
23b20a70 | 273 | |
2b083808 | 274 | \f |
432f78d2 RS |
275 | /* Adjust markers for an insertion that stretches from FROM / FROM_BYTE |
276 | to TO / TO_BYTE. We have to relocate the charpos of every marker | |
277 | that points after the insertion (but not their bytepos). | |
3be11131 | 278 | |
3be11131 RS |
279 | When a marker points at the insertion point, |
280 | we advance it if either its insertion-type is t | |
281 | or BEFORE_MARKERS is true. */ | |
282 | ||
283 | static void | |
d311d28c | 284 | adjust_markers_for_insert (ptrdiff_t from, ptrdiff_t from_byte, |
a08d4ba7 | 285 | ptrdiff_t to, ptrdiff_t to_byte, bool before_markers) |
beecb55b | 286 | { |
dab0b04d | 287 | struct Lisp_Marker *m; |
a08d4ba7 | 288 | bool adjusted = 0; |
d311d28c PE |
289 | ptrdiff_t nchars = to - from; |
290 | ptrdiff_t nbytes = to_byte - from_byte; | |
beecb55b | 291 | |
dab0b04d | 292 | for (m = BUF_MARKERS (current_buffer); m; m = m->next) |
beecb55b | 293 | { |
86a56ef3 SM |
294 | eassert (m->bytepos >= m->charpos |
295 | && m->bytepos - m->charpos <= Z_BYTE - Z); | |
1f90a790 | 296 | |
432f78d2 | 297 | if (m->bytepos == from_byte) |
469ff680 | 298 | { |
432f78d2 RS |
299 | if (m->insertion_type || before_markers) |
300 | { | |
b16afa45 KH |
301 | m->bytepos = to_byte; |
302 | m->charpos = to; | |
432f78d2 RS |
303 | if (m->insertion_type) |
304 | adjusted = 1; | |
305 | } | |
ce97a2d7 | 306 | } |
80f6e77c RS |
307 | else if (m->bytepos > from_byte) |
308 | { | |
309 | m->bytepos += nbytes; | |
b16afa45 | 310 | m->charpos += nchars; |
80f6e77c | 311 | } |
beecb55b | 312 | } |
3be11131 RS |
313 | |
314 | /* Adjusting only markers whose insertion-type is t may result in | |
409f2919 | 315 | - disordered start and end in overlays, and |
6b61353c | 316 | - disordered overlays in the slot `overlays_before' of current_buffer. */ |
469ff680 | 317 | if (adjusted) |
6b61353c | 318 | { |
5e617bc2 | 319 | fix_start_end_in_overlays (from, to); |
6b61353c KH |
320 | fix_overlays_before (current_buffer, from, to); |
321 | } | |
beecb55b RS |
322 | } |
323 | ||
3be11131 RS |
324 | /* Adjust point for an insertion of NBYTES bytes, which are NCHARS characters. |
325 | ||
326 | This is used only when the value of point changes due to an insert | |
327 | or delete; it does not represent a conceptual change in point as a | |
328 | marker. In particular, point is not crossing any interval | |
329 | boundaries, so there's no need to use the usual SET_PT macro. In | |
330 | fact it would be incorrect to do so, because either the old or the | |
331 | new value of point is out of sync with the current set of | |
332 | intervals. */ | |
333 | ||
a27a38d8 | 334 | static void |
d311d28c | 335 | adjust_point (ptrdiff_t nchars, ptrdiff_t nbytes) |
a27a38d8 | 336 | { |
cffc6f3b | 337 | SET_BUF_PT_BOTH (current_buffer, PT + nchars, PT_BYTE + nbytes); |
3be11131 | 338 | /* In a single-byte buffer, the two positions must be equal. */ |
86a56ef3 | 339 | eassert (PT_BYTE >= PT && PT_BYTE - PT <= ZV_BYTE - ZV); |
a27a38d8 | 340 | } |
b45433b3 | 341 | \f |
652838b5 KH |
342 | /* Adjust markers for a replacement of a text at FROM (FROM_BYTE) of |
343 | length OLD_CHARS (OLD_BYTES) to a new text of length NEW_CHARS | |
adee4f91 KH |
344 | (NEW_BYTES). It is assumed that OLD_CHARS > 0, i.e., this is not |
345 | an insertion. */ | |
652838b5 KH |
346 | |
347 | static void | |
d311d28c PE |
348 | adjust_markers_for_replace (ptrdiff_t from, ptrdiff_t from_byte, |
349 | ptrdiff_t old_chars, ptrdiff_t old_bytes, | |
350 | ptrdiff_t new_chars, ptrdiff_t new_bytes) | |
652838b5 | 351 | { |
dab0b04d | 352 | register struct Lisp_Marker *m; |
d311d28c PE |
353 | ptrdiff_t prev_to_byte = from_byte + old_bytes; |
354 | ptrdiff_t diff_chars = new_chars - old_chars; | |
355 | ptrdiff_t diff_bytes = new_bytes - old_bytes; | |
652838b5 | 356 | |
dab0b04d | 357 | for (m = BUF_MARKERS (current_buffer); m; m = m->next) |
652838b5 | 358 | { |
adee4f91 | 359 | if (m->bytepos >= prev_to_byte) |
652838b5 | 360 | { |
adee4f91 KH |
361 | m->charpos += diff_chars; |
362 | m->bytepos += diff_bytes; | |
652838b5 | 363 | } |
adee4f91 | 364 | else if (m->bytepos > from_byte) |
652838b5 | 365 | { |
652838b5 | 366 | m->charpos = from; |
b16afa45 | 367 | m->bytepos = from_byte; |
652838b5 | 368 | } |
652838b5 | 369 | } |
3019692c | 370 | |
e2688e4a | 371 | check_markers (); |
652838b5 KH |
372 | } |
373 | ||
374 | \f | |
99561444 PE |
375 | void |
376 | buffer_overflow (void) | |
377 | { | |
378 | error ("Maximum buffer size exceeded"); | |
379 | } | |
380 | ||
3be11131 | 381 | /* Make the gap NBYTES_ADDED bytes longer. */ |
b45433b3 | 382 | |
85876d07 | 383 | static void |
d311d28c | 384 | make_gap_larger (ptrdiff_t nbytes_added) |
b45433b3 | 385 | { |
b45433b3 | 386 | Lisp_Object tem; |
d311d28c PE |
387 | ptrdiff_t real_gap_loc; |
388 | ptrdiff_t real_gap_loc_byte; | |
389 | ptrdiff_t old_gap_size; | |
390 | ptrdiff_t current_size = Z_BYTE - BEG_BYTE + GAP_SIZE; | |
1c8e352f | 391 | enum { enough_for_a_while = 2000 }; |
b45433b3 | 392 | |
1c8e352f PE |
393 | if (BUF_BYTES_MAX - current_size < nbytes_added) |
394 | buffer_overflow (); | |
b45433b3 | 395 | |
1c8e352f PE |
396 | /* If we have to get more space, get enough to last a while; |
397 | but do not exceed the maximum buffer size. */ | |
398 | nbytes_added = min (nbytes_added + enough_for_a_while, | |
399 | BUF_BYTES_MAX - current_size); | |
94056516 | 400 | |
71a7bfa7 | 401 | enlarge_buffer_text (current_buffer, nbytes_added); |
b45433b3 JB |
402 | |
403 | /* Prevent quitting in move_gap. */ | |
404 | tem = Vinhibit_quit; | |
405 | Vinhibit_quit = Qt; | |
406 | ||
407 | real_gap_loc = GPT; | |
3be11131 | 408 | real_gap_loc_byte = GPT_BYTE; |
b45433b3 JB |
409 | old_gap_size = GAP_SIZE; |
410 | ||
411 | /* Call the newly allocated space a gap at the end of the whole space. */ | |
412 | GPT = Z + GAP_SIZE; | |
7d92db58 | 413 | GPT_BYTE = Z_BYTE + GAP_SIZE; |
3be11131 | 414 | GAP_SIZE = nbytes_added; |
b45433b3 JB |
415 | |
416 | /* Move the new gap down to be consecutive with the end of the old one. | |
417 | This adjusts the markers properly too. */ | |
3be11131 | 418 | gap_left (real_gap_loc + old_gap_size, real_gap_loc_byte + old_gap_size, 1); |
b45433b3 JB |
419 | |
420 | /* Now combine the two into one large gap. */ | |
421 | GAP_SIZE += old_gap_size; | |
422 | GPT = real_gap_loc; | |
3be11131 | 423 | GPT_BYTE = real_gap_loc_byte; |
b45433b3 | 424 | |
469ff680 KH |
425 | /* Put an anchor. */ |
426 | *(Z_ADDR) = 0; | |
427 | ||
b45433b3 JB |
428 | Vinhibit_quit = tem; |
429 | } | |
8af5b8e7 | 430 | |
b58c5c4a | 431 | #if defined USE_MMAP_FOR_BUFFERS || defined REL_ALLOC || defined DOUG_LEA_MALLOC |
8af5b8e7 | 432 | |
7273faa1 | 433 | /* Make the gap NBYTES_REMOVED bytes shorter. */ |
8af5b8e7 | 434 | |
85876d07 | 435 | static void |
d311d28c | 436 | make_gap_smaller (ptrdiff_t nbytes_removed) |
8af5b8e7 AI |
437 | { |
438 | Lisp_Object tem; | |
d311d28c PE |
439 | ptrdiff_t real_gap_loc; |
440 | ptrdiff_t real_gap_loc_byte; | |
441 | ptrdiff_t real_Z; | |
442 | ptrdiff_t real_Z_byte; | |
443 | ptrdiff_t real_beg_unchanged; | |
444 | ptrdiff_t new_gap_size; | |
8af5b8e7 AI |
445 | |
446 | /* Make sure the gap is at least 20 bytes. */ | |
447 | if (GAP_SIZE - nbytes_removed < 20) | |
448 | nbytes_removed = GAP_SIZE - 20; | |
449 | ||
450 | /* Prevent quitting in move_gap. */ | |
451 | tem = Vinhibit_quit; | |
452 | Vinhibit_quit = Qt; | |
453 | ||
454 | real_gap_loc = GPT; | |
455 | real_gap_loc_byte = GPT_BYTE; | |
73df3b72 | 456 | new_gap_size = GAP_SIZE - nbytes_removed; |
8af5b8e7 AI |
457 | real_Z = Z; |
458 | real_Z_byte = Z_BYTE; | |
73df3b72 | 459 | real_beg_unchanged = BEG_UNCHANGED; |
8af5b8e7 AI |
460 | |
461 | /* Pretend that the last unwanted part of the gap is the entire gap, | |
462 | and that the first desired part of the gap is part of the buffer | |
463 | text. */ | |
72af86bd | 464 | memset (GPT_ADDR, 0, new_gap_size); |
73df3b72 KS |
465 | GPT += new_gap_size; |
466 | GPT_BYTE += new_gap_size; | |
467 | Z += new_gap_size; | |
468 | Z_BYTE += new_gap_size; | |
8af5b8e7 AI |
469 | GAP_SIZE = nbytes_removed; |
470 | ||
471 | /* Move the unwanted pretend gap to the end of the buffer. This | |
472 | adjusts the markers properly too. */ | |
473 | gap_right (Z, Z_BYTE); | |
474 | ||
475 | enlarge_buffer_text (current_buffer, -nbytes_removed); | |
476 | ||
477 | /* Now restore the desired gap. */ | |
73df3b72 | 478 | GAP_SIZE = new_gap_size; |
8af5b8e7 AI |
479 | GPT = real_gap_loc; |
480 | GPT_BYTE = real_gap_loc_byte; | |
481 | Z = real_Z; | |
482 | Z_BYTE = real_Z_byte; | |
73df3b72 | 483 | BEG_UNCHANGED = real_beg_unchanged; |
8af5b8e7 AI |
484 | |
485 | /* Put an anchor. */ | |
486 | *(Z_ADDR) = 0; | |
487 | ||
488 | Vinhibit_quit = tem; | |
489 | } | |
490 | ||
b58c5c4a PE |
491 | #endif /* USE_MMAP_FOR_BUFFERS || REL_ALLOC || DOUG_LEA_MALLOC */ |
492 | ||
8af5b8e7 | 493 | void |
d311d28c | 494 | make_gap (ptrdiff_t nbytes_added) |
8af5b8e7 AI |
495 | { |
496 | if (nbytes_added >= 0) | |
497 | make_gap_larger (nbytes_added); | |
d77fbc16 | 498 | #if defined USE_MMAP_FOR_BUFFERS || defined REL_ALLOC || defined DOUG_LEA_MALLOC |
8af5b8e7 AI |
499 | else |
500 | make_gap_smaller (-nbytes_added); | |
501 | #endif | |
502 | } | |
b45433b3 | 503 | \f |
2b083808 RS |
504 | /* Copy NBYTES bytes of text from FROM_ADDR to TO_ADDR. |
505 | FROM_MULTIBYTE says whether the incoming text is multibyte. | |
506 | TO_MULTIBYTE says whether to store the text as multibyte. | |
507 | If FROM_MULTIBYTE != TO_MULTIBYTE, we convert. | |
508 | ||
509 | Return the number of bytes stored at TO_ADDR. */ | |
510 | ||
d311d28c | 511 | ptrdiff_t |
ae19ba7c | 512 | copy_text (const unsigned char *from_addr, unsigned char *to_addr, |
a08d4ba7 | 513 | ptrdiff_t nbytes, bool from_multibyte, bool to_multibyte) |
2b083808 RS |
514 | { |
515 | if (from_multibyte == to_multibyte) | |
516 | { | |
72af86bd | 517 | memcpy (to_addr, from_addr, nbytes); |
2b083808 RS |
518 | return nbytes; |
519 | } | |
520 | else if (from_multibyte) | |
521 | { | |
d311d28c PE |
522 | ptrdiff_t nchars = 0; |
523 | ptrdiff_t bytes_left = nbytes; | |
f44cbcd8 | 524 | |
2b083808 RS |
525 | while (bytes_left > 0) |
526 | { | |
b16afa45 | 527 | int thislen, c; |
62a6e103 | 528 | c = STRING_CHAR_AND_LENGTH (from_addr, thislen); |
1ede3eb6 KH |
529 | if (! ASCII_CHAR_P (c)) |
530 | c &= 0xFF; | |
f44cbcd8 | 531 | *to_addr++ = c; |
2b083808 | 532 | from_addr += thislen; |
7e79b8e0 | 533 | bytes_left -= thislen; |
2b083808 RS |
534 | nchars++; |
535 | } | |
536 | return nchars; | |
537 | } | |
538 | else | |
539 | { | |
540 | unsigned char *initial_to_addr = to_addr; | |
541 | ||
542 | /* Convert single-byte to multibyte. */ | |
543 | while (nbytes > 0) | |
544 | { | |
545 | int c = *from_addr++; | |
2b083808 | 546 | |
4c0354d7 | 547 | if (!ASCII_CHAR_P (c)) |
2b083808 | 548 | { |
4c0354d7 | 549 | c = BYTE8_TO_CHAR (c); |
0ef71121 | 550 | to_addr += CHAR_STRING (c, to_addr); |
2b083808 RS |
551 | nbytes--; |
552 | } | |
553 | else | |
554 | /* Special case for speed. */ | |
555 | *to_addr++ = c, nbytes--; | |
556 | } | |
557 | return to_addr - initial_to_addr; | |
558 | } | |
559 | } | |
2b083808 | 560 | \f |
b45433b3 | 561 | /* Insert a string of specified length before point. |
2b083808 RS |
562 | This function judges multibyteness based on |
563 | enable_multibyte_characters in the current buffer; | |
564 | it never converts between single-byte and multibyte. | |
565 | ||
ef29f213 KH |
566 | DO NOT use this for the contents of a Lisp string or a Lisp buffer! |
567 | prepare_to_modify_buffer could relocate the text. */ | |
b45433b3 | 568 | |
c660b094 | 569 | void |
d311d28c | 570 | insert (const char *string, ptrdiff_t nbytes) |
b45433b3 | 571 | { |
3be11131 | 572 | if (nbytes > 0) |
395ec62e | 573 | { |
d311d28c | 574 | ptrdiff_t len = chars_in_text ((unsigned char *) string, nbytes), opoint; |
bab3eee1 EZ |
575 | insert_1_both (string, len, nbytes, 0, 1, 0); |
576 | opoint = PT - len; | |
577 | signal_after_change (opoint, 0, len); | |
0ef71121 | 578 | update_compositions (opoint, PT, CHECK_BORDER); |
cd11ef31 RS |
579 | } |
580 | } | |
581 | ||
2b083808 RS |
582 | /* Likewise, but inherit text properties from neighboring characters. */ |
583 | ||
c660b094 | 584 | void |
d311d28c | 585 | insert_and_inherit (const char *string, ptrdiff_t nbytes) |
cd11ef31 | 586 | { |
3be11131 | 587 | if (nbytes > 0) |
cd11ef31 | 588 | { |
d311d28c | 589 | ptrdiff_t len = chars_in_text ((unsigned char *) string, nbytes), opoint; |
bab3eee1 EZ |
590 | insert_1_both (string, len, nbytes, 1, 1, 0); |
591 | opoint = PT - len; | |
592 | signal_after_change (opoint, 0, len); | |
0ef71121 | 593 | update_compositions (opoint, PT, CHECK_BORDER); |
395ec62e KH |
594 | } |
595 | } | |
b45433b3 | 596 | |
2b083808 | 597 | /* Insert the character C before point. Do not inherit text properties. */ |
3be11131 | 598 | |
c660b094 | 599 | void |
ae19ba7c | 600 | insert_char (int c) |
3be11131 | 601 | { |
0ef71121 | 602 | unsigned char str[MAX_MULTIBYTE_LENGTH]; |
2b083808 RS |
603 | int len; |
604 | ||
4b4deea2 | 605 | if (! NILP (BVAR (current_buffer, enable_multibyte_characters))) |
0ef71121 | 606 | len = CHAR_STRING (c, str); |
2b083808 RS |
607 | else |
608 | { | |
609 | len = 1; | |
0ef71121 | 610 | str[0] = c; |
2b083808 | 611 | } |
3be11131 | 612 | |
b68864e5 | 613 | insert ((char *) str, len); |
3be11131 RS |
614 | } |
615 | ||
2b083808 | 616 | /* Insert the null-terminated string S before point. */ |
3be11131 RS |
617 | |
618 | void | |
ae19ba7c | 619 | insert_string (const char *s) |
3be11131 RS |
620 | { |
621 | insert (s, strlen (s)); | |
622 | } | |
623 | ||
624 | /* Like `insert' except that all markers pointing at the place where | |
625 | the insertion happens are adjusted to point after it. | |
626 | Don't use this function to insert part of a Lisp string, | |
627 | since gc could happen and relocate it. */ | |
628 | ||
629 | void | |
d311d28c | 630 | insert_before_markers (const char *string, ptrdiff_t nbytes) |
3be11131 RS |
631 | { |
632 | if (nbytes > 0) | |
633 | { | |
d311d28c | 634 | ptrdiff_t len = chars_in_text ((unsigned char *) string, nbytes), opoint; |
bab3eee1 EZ |
635 | insert_1_both (string, len, nbytes, 0, 1, 1); |
636 | opoint = PT - len; | |
637 | signal_after_change (opoint, 0, len); | |
0ef71121 | 638 | update_compositions (opoint, PT, CHECK_BORDER); |
3be11131 RS |
639 | } |
640 | } | |
641 | ||
2b083808 RS |
642 | /* Likewise, but inherit text properties from neighboring characters. */ |
643 | ||
3be11131 | 644 | void |
b68864e5 | 645 | insert_before_markers_and_inherit (const char *string, |
d311d28c | 646 | ptrdiff_t nbytes) |
3be11131 RS |
647 | { |
648 | if (nbytes > 0) | |
649 | { | |
d311d28c | 650 | ptrdiff_t len = chars_in_text ((unsigned char *) string, nbytes), opoint; |
bab3eee1 EZ |
651 | insert_1_both (string, len, nbytes, 1, 1, 1); |
652 | opoint = PT - len; | |
653 | signal_after_change (opoint, 0, len); | |
0ef71121 | 654 | update_compositions (opoint, PT, CHECK_BORDER); |
3be11131 RS |
655 | } |
656 | } | |
1f90a790 | 657 | |
3be11131 RS |
658 | /* Subroutine used by the insert functions above. */ |
659 | ||
660 | void | |
d311d28c | 661 | insert_1 (const char *string, ptrdiff_t nbytes, |
a08d4ba7 | 662 | bool inherit, bool prepare, bool before_markers) |
395ec62e | 663 | { |
b68864e5 PE |
664 | insert_1_both (string, chars_in_text ((unsigned char *) string, nbytes), |
665 | nbytes, inherit, prepare, before_markers); | |
432f78d2 | 666 | } |
b16afa45 | 667 | |
1f90a790 | 668 | \f |
b16afa45 KH |
669 | #ifdef BYTE_COMBINING_DEBUG |
670 | ||
432f78d2 RS |
671 | /* See if the bytes before POS/POS_BYTE combine with bytes |
672 | at the start of STRING to form a single character. | |
ce97a2d7 | 673 | If so, return the number of bytes at the start of STRING |
432f78d2 | 674 | which combine in this way. Otherwise, return 0. */ |
b45433b3 | 675 | |
432f78d2 | 676 | int |
d311d28c PE |
677 | count_combining_before (const unsigned char *string, ptrdiff_t length, |
678 | ptrdiff_t pos, ptrdiff_t pos_byte) | |
432f78d2 | 679 | { |
cae184f2 | 680 | int len, combining_bytes; |
641a26d2 | 681 | const unsigned char *p; |
b45433b3 | 682 | |
432f78d2 RS |
683 | if (NILP (current_buffer->enable_multibyte_characters)) |
684 | return 0; | |
cae184f2 KH |
685 | |
686 | /* At first, we can exclude the following cases: | |
687 | (1) STRING[0] can't be a following byte of multibyte sequence. | |
688 | (2) POS is the start of the current buffer. | |
689 | (3) A character before POS is not a multibyte character. */ | |
690 | if (length == 0 || CHAR_HEAD_P (*string)) /* case (1) */ | |
432f78d2 | 691 | return 0; |
cae184f2 | 692 | if (pos_byte == BEG_BYTE) /* case (2) */ |
432f78d2 | 693 | return 0; |
cae184f2 KH |
694 | len = 1; |
695 | p = BYTE_POS_ADDR (pos_byte - 1); | |
696 | while (! CHAR_HEAD_P (*p)) p--, len++; | |
409f2919 | 697 | if (! LEADING_CODE_P (*p)) /* case (3) */ |
432f78d2 | 698 | return 0; |
cae184f2 | 699 | |
cae184f2 KH |
700 | combining_bytes = BYTES_BY_CHAR_HEAD (*p) - len; |
701 | if (combining_bytes <= 0) | |
702 | /* The character preceding POS is, complete and no room for | |
703 | combining bytes (combining_bytes == 0), or an independent 8-bit | |
704 | character (combining_bytes < 0). */ | |
432f78d2 | 705 | return 0; |
ce97a2d7 | 706 | |
cae184f2 KH |
707 | /* We have a combination situation. Count the bytes at STRING that |
708 | may combine. */ | |
709 | p = string + 1; | |
ce97a2d7 RS |
710 | while (!CHAR_HEAD_P (*p) && p < string + length) |
711 | p++; | |
712 | ||
cae184f2 | 713 | return (combining_bytes < p - string ? combining_bytes : p - string); |
432f78d2 | 714 | } |
b45433b3 | 715 | |
432f78d2 RS |
716 | /* See if the bytes after POS/POS_BYTE combine with bytes |
717 | at the end of STRING to form a single character. | |
718 | If so, return the number of bytes after POS/POS_BYTE | |
719 | which combine in this way. Otherwise, return 0. */ | |
679194a6 | 720 | |
432f78d2 | 721 | int |
ae19ba7c | 722 | count_combining_after (const unsigned char *string, |
d311d28c | 723 | ptrdiff_t length, ptrdiff_t pos, ptrdiff_t pos_byte) |
432f78d2 | 724 | { |
d311d28c PE |
725 | ptrdiff_t opos_byte = pos_byte; |
726 | ptrdiff_t i; | |
727 | ptrdiff_t bytes; | |
cae184f2 | 728 | unsigned char *bufp; |
3be11131 | 729 | |
432f78d2 RS |
730 | if (NILP (current_buffer->enable_multibyte_characters)) |
731 | return 0; | |
cae184f2 KH |
732 | |
733 | /* At first, we can exclude the following cases: | |
734 | (1) The last byte of STRING is an ASCII. | |
735 | (2) POS is the last of the current buffer. | |
736 | (3) A character at POS can't be a following byte of multibyte | |
737 | character. */ | |
738 | if (length > 0 && ASCII_BYTE_P (string[length - 1])) /* case (1) */ | |
739 | return 0; | |
740 | if (pos_byte == Z_BYTE) /* case (2) */ | |
432f78d2 | 741 | return 0; |
cae184f2 KH |
742 | bufp = BYTE_POS_ADDR (pos_byte); |
743 | if (CHAR_HEAD_P (*bufp)) /* case (3) */ | |
744 | return 0; | |
745 | ||
432f78d2 | 746 | i = length - 1; |
b57a7b0b | 747 | while (i >= 0 && ! CHAR_HEAD_P (string[i])) |
432f78d2 RS |
748 | { |
749 | i--; | |
750 | } | |
b57a7b0b KH |
751 | if (i < 0) |
752 | { | |
cae184f2 KH |
753 | /* All characters in STRING are not character head. We must |
754 | check also preceding bytes at POS. We are sure that the gap | |
755 | is at POS. */ | |
756 | unsigned char *p = BEG_ADDR; | |
b57a7b0b | 757 | i = pos_byte - 2; |
cae184f2 | 758 | while (i >= 0 && ! CHAR_HEAD_P (p[i])) |
b57a7b0b | 759 | i--; |
409f2919 | 760 | if (i < 0 || !LEADING_CODE_P (p[i])) |
b57a7b0b | 761 | return 0; |
0ef71121 | 762 | |
cae184f2 KH |
763 | bytes = BYTES_BY_CHAR_HEAD (p[i]); |
764 | return (bytes <= pos_byte - 1 - i + length | |
765 | ? 0 | |
766 | : bytes - (pos_byte - 1 - i + length)); | |
b57a7b0b | 767 | } |
409f2919 | 768 | if (!LEADING_CODE_P (string[i])) |
432f78d2 RS |
769 | return 0; |
770 | ||
cae184f2 KH |
771 | bytes = BYTES_BY_CHAR_HEAD (string[i]) - (length - i); |
772 | bufp++, pos_byte++; | |
773 | while (!CHAR_HEAD_P (*bufp)) bufp++, pos_byte++; | |
cd11ef31 | 774 | |
cae184f2 | 775 | return (bytes <= pos_byte - opos_byte ? bytes : pos_byte - opos_byte); |
b45433b3 | 776 | } |
2b083808 | 777 | |
b16afa45 | 778 | #endif |
9f3ede3c | 779 | |
1f90a790 | 780 | \f |
2b083808 RS |
781 | /* Insert a sequence of NCHARS chars which occupy NBYTES bytes |
782 | starting at STRING. INHERIT, PREPARE and BEFORE_MARKERS | |
783 | are the same as in insert_1. */ | |
784 | ||
785 | void | |
b68864e5 | 786 | insert_1_both (const char *string, |
d311d28c | 787 | ptrdiff_t nchars, ptrdiff_t nbytes, |
a08d4ba7 | 788 | bool inherit, bool prepare, bool before_markers) |
2b083808 | 789 | { |
da80a8d5 GM |
790 | if (nchars == 0) |
791 | return; | |
177c0ea7 | 792 | |
4b4deea2 | 793 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
57404188 KH |
794 | nchars = nbytes; |
795 | ||
35d63725 RS |
796 | if (prepare) |
797 | /* Do this before moving and increasing the gap, | |
798 | because the before-change hooks might move the gap | |
799 | or make it smaller. */ | |
800 | prepare_to_modify_buffer (PT, PT, NULL); | |
801 | ||
2b083808 RS |
802 | if (PT != GPT) |
803 | move_gap_both (PT, PT_BYTE); | |
804 | if (GAP_SIZE < nbytes) | |
805 | make_gap (nbytes - GAP_SIZE); | |
806 | ||
b16afa45 KH |
807 | #ifdef BYTE_COMBINING_DEBUG |
808 | if (count_combining_before (string, nbytes, PT, PT_BYTE) | |
809 | || count_combining_after (string, nbytes, PT, PT_BYTE)) | |
1088b922 | 810 | emacs_abort (); |
b16afa45 | 811 | #endif |
432f78d2 RS |
812 | |
813 | /* Record deletion of the surrounding text that combines with | |
814 | the insertion. This, together with recording the insertion, | |
b16afa45 KH |
815 | will add up to the right stuff in the undo list. */ |
816 | record_insert (PT, nchars); | |
2b083808 | 817 | MODIFF++; |
3e145152 | 818 | CHARS_MODIFF = MODIFF; |
2b083808 | 819 | |
72af86bd | 820 | memcpy (GPT_ADDR, string, nbytes); |
2b083808 | 821 | |
2b083808 | 822 | GAP_SIZE -= nbytes; |
1f90a790 RS |
823 | GPT += nchars; |
824 | ZV += nchars; | |
825 | Z += nchars; | |
2b083808 RS |
826 | GPT_BYTE += nbytes; |
827 | ZV_BYTE += nbytes; | |
828 | Z_BYTE += nbytes; | |
829 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ | |
1f90a790 | 830 | |
e2688e4a | 831 | eassert (GPT <= GPT_BYTE); |
1f90a790 | 832 | |
9dde4e0c KS |
833 | /* The insert may have been in the unchanged region, so check again. */ |
834 | if (Z - GPT < END_UNCHANGED) | |
835 | END_UNCHANGED = Z - GPT; | |
836 | ||
1f90a790 | 837 | adjust_overlays_for_insert (PT, nchars); |
432f78d2 | 838 | adjust_markers_for_insert (PT, PT_BYTE, |
1f90a790 | 839 | PT + nchars, PT_BYTE + nbytes, |
2b083808 | 840 | before_markers); |
ce97a2d7 | 841 | |
2f294edf | 842 | offset_intervals (current_buffer, PT, nchars); |
1f90a790 | 843 | |
0c94c8d6 | 844 | if (!inherit && buffer_intervals (current_buffer)) |
f2cab2ea GM |
845 | set_text_properties (make_number (PT), make_number (PT + nchars), |
846 | Qnil, Qnil, Qnil); | |
ce97a2d7 | 847 | |
b16afa45 | 848 | adjust_point (nchars, nbytes); |
828f1ed3 | 849 | |
e2688e4a | 850 | check_markers (); |
2b083808 | 851 | } |
3be11131 | 852 | \f |
679194a6 | 853 | /* Insert the part of the text of STRING, a Lisp object assumed to be |
2b083808 RS |
854 | of type string, consisting of the LENGTH characters (LENGTH_BYTE bytes) |
855 | starting at position POS / POS_BYTE. If the text of STRING has properties, | |
856 | copy them into the buffer. | |
679194a6 JA |
857 | |
858 | It does not work to use `insert' for this, because a GC could happen | |
72af86bd | 859 | before we copy the stuff into the buffer, and relocate the string |
7e1ea612 | 860 | without insert noticing. */ |
679194a6 | 861 | |
c660b094 | 862 | void |
d311d28c | 863 | insert_from_string (Lisp_Object string, ptrdiff_t pos, ptrdiff_t pos_byte, |
a08d4ba7 | 864 | ptrdiff_t length, ptrdiff_t length_byte, bool inherit) |
395ec62e | 865 | { |
d311d28c | 866 | ptrdiff_t opoint = PT; |
d8bf4256 RS |
867 | |
868 | if (SCHARS (string) == 0) | |
869 | return; | |
870 | ||
62b82678 RS |
871 | insert_from_string_1 (string, pos, pos_byte, length, length_byte, |
872 | inherit, 0); | |
873 | signal_after_change (opoint, 0, PT - opoint); | |
0ef71121 | 874 | update_compositions (opoint, PT, CHECK_BORDER); |
395ec62e KH |
875 | } |
876 | ||
2b083808 RS |
877 | /* Like `insert_from_string' except that all markers pointing |
878 | at the place where the insertion happens are adjusted to point after it. */ | |
3be11131 RS |
879 | |
880 | void | |
ae19ba7c | 881 | insert_from_string_before_markers (Lisp_Object string, |
d311d28c PE |
882 | ptrdiff_t pos, ptrdiff_t pos_byte, |
883 | ptrdiff_t length, ptrdiff_t length_byte, | |
a08d4ba7 | 884 | bool inherit) |
3be11131 | 885 | { |
d311d28c | 886 | ptrdiff_t opoint = PT; |
d8bf4256 RS |
887 | |
888 | if (SCHARS (string) == 0) | |
889 | return; | |
890 | ||
62b82678 RS |
891 | insert_from_string_1 (string, pos, pos_byte, length, length_byte, |
892 | inherit, 1); | |
893 | signal_after_change (opoint, 0, PT - opoint); | |
0ef71121 | 894 | update_compositions (opoint, PT, CHECK_BORDER); |
3be11131 RS |
895 | } |
896 | ||
897 | /* Subroutine of the insertion functions above. */ | |
898 | ||
899 | static void | |
d311d28c PE |
900 | insert_from_string_1 (Lisp_Object string, ptrdiff_t pos, ptrdiff_t pos_byte, |
901 | ptrdiff_t nchars, ptrdiff_t nbytes, | |
a08d4ba7 | 902 | bool inherit, bool before_markers) |
b45433b3 | 903 | { |
b45433b3 | 904 | struct gcpro gcpro1; |
d311d28c | 905 | ptrdiff_t outgoing_nbytes = nbytes; |
ce97a2d7 | 906 | INTERVAL intervals; |
2b083808 RS |
907 | |
908 | /* Make OUTGOING_NBYTES describe the text | |
909 | as it will be inserted in this buffer. */ | |
910 | ||
4b4deea2 | 911 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
2b083808 | 912 | outgoing_nbytes = nchars; |
2a1d8be0 | 913 | else if (! STRING_MULTIBYTE (string)) |
2b083808 | 914 | outgoing_nbytes |
f7e233a8 | 915 | = count_size_as_multibyte (SDATA (string) + pos_byte, |
2b083808 | 916 | nbytes); |
b45433b3 | 917 | |
b45433b3 | 918 | GCPRO1 (string); |
35d63725 RS |
919 | /* Do this before moving and increasing the gap, |
920 | because the before-change hooks might move the gap | |
921 | or make it smaller. */ | |
d206af14 | 922 | prepare_to_modify_buffer (PT, PT, NULL); |
b45433b3 | 923 | |
2bcaed71 | 924 | if (PT != GPT) |
3be11131 | 925 | move_gap_both (PT, PT_BYTE); |
534b9840 | 926 | if (GAP_SIZE < outgoing_nbytes) |
2b083808 | 927 | make_gap (outgoing_nbytes - GAP_SIZE); |
b45433b3 JB |
928 | UNGCPRO; |
929 | ||
2b083808 RS |
930 | /* Copy the string text into the buffer, perhaps converting |
931 | between single-byte and multibyte. */ | |
d5db4077 | 932 | copy_text (SDATA (string) + pos_byte, GPT_ADDR, nbytes, |
2a1d8be0 | 933 | STRING_MULTIBYTE (string), |
4b4deea2 | 934 | ! NILP (BVAR (current_buffer, enable_multibyte_characters))); |
b45433b3 | 935 | |
b16afa45 | 936 | #ifdef BYTE_COMBINING_DEBUG |
432f78d2 RS |
937 | /* We have copied text into the gap, but we have not altered |
938 | PT or PT_BYTE yet. So we can pass PT and PT_BYTE | |
939 | to these functions and get the same results as we would | |
940 | have got earlier on. Meanwhile, PT_ADDR does point to | |
941 | the text that has been stored by copy_text. */ | |
b16afa45 KH |
942 | if (count_combining_before (GPT_ADDR, outgoing_nbytes, PT, PT_BYTE) |
943 | || count_combining_after (GPT_ADDR, outgoing_nbytes, PT, PT_BYTE)) | |
1088b922 | 944 | emacs_abort (); |
b16afa45 | 945 | #endif |
432f78d2 | 946 | |
b16afa45 | 947 | record_insert (PT, nchars); |
432f78d2 | 948 | MODIFF++; |
3e145152 | 949 | CHARS_MODIFF = MODIFF; |
432f78d2 | 950 | |
7792090e | 951 | GAP_SIZE -= outgoing_nbytes; |
1f90a790 RS |
952 | GPT += nchars; |
953 | ZV += nchars; | |
954 | Z += nchars; | |
2b083808 RS |
955 | GPT_BYTE += outgoing_nbytes; |
956 | ZV_BYTE += outgoing_nbytes; | |
957 | Z_BYTE += outgoing_nbytes; | |
469ff680 | 958 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
3be11131 | 959 | |
e2688e4a | 960 | eassert (GPT <= GPT_BYTE); |
679194a6 | 961 | |
9dde4e0c KS |
962 | /* The insert may have been in the unchanged region, so check again. */ |
963 | if (Z - GPT < END_UNCHANGED) | |
964 | END_UNCHANGED = Z - GPT; | |
965 | ||
1f90a790 RS |
966 | adjust_overlays_for_insert (PT, nchars); |
967 | adjust_markers_for_insert (PT, PT_BYTE, PT + nchars, | |
968 | PT_BYTE + outgoing_nbytes, | |
1f90a790 | 969 | before_markers); |
ce97a2d7 | 970 | |
1f90a790 RS |
971 | offset_intervals (current_buffer, PT, nchars); |
972 | ||
0c94c8d6 | 973 | intervals = string_intervals (string); |
b16afa45 | 974 | /* Get the intervals for the part of the string we are inserting. */ |
d5db4077 | 975 | if (nbytes < SBYTES (string)) |
1f90a790 | 976 | intervals = copy_intervals (intervals, pos, nchars); |
177c0ea7 | 977 | |
ce97a2d7 | 978 | /* Insert those intervals. */ |
1f90a790 | 979 | graft_intervals_into_buffer (intervals, PT, nchars, |
9391e591 | 980 | current_buffer, inherit); |
ce97a2d7 | 981 | |
b16afa45 | 982 | adjust_point (nchars, outgoing_nbytes); |
8f924df7 | 983 | |
e2688e4a | 984 | check_markers (); |
8f924df7 KH |
985 | } |
986 | \f | |
987 | /* Insert a sequence of NCHARS chars which occupy NBYTES bytes | |
988 | starting at GPT_ADDR. */ | |
989 | ||
990 | void | |
d311d28c | 991 | insert_from_gap (ptrdiff_t nchars, ptrdiff_t nbytes) |
8f924df7 | 992 | { |
4b4deea2 | 993 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
8f924df7 KH |
994 | nchars = nbytes; |
995 | ||
996 | record_insert (GPT, nchars); | |
997 | MODIFF++; | |
998 | ||
999 | GAP_SIZE -= nbytes; | |
1000 | GPT += nchars; | |
1001 | ZV += nchars; | |
1002 | Z += nchars; | |
1003 | GPT_BYTE += nbytes; | |
1004 | ZV_BYTE += nbytes; | |
1005 | Z_BYTE += nbytes; | |
1006 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ | |
1007 | ||
e2688e4a | 1008 | eassert (GPT <= GPT_BYTE); |
8f924df7 | 1009 | |
c669988b KH |
1010 | adjust_overlays_for_insert (GPT - nchars, nchars); |
1011 | adjust_markers_for_insert (GPT - nchars, GPT_BYTE - nbytes, | |
1012 | GPT, GPT_BYTE, 0); | |
8f924df7 | 1013 | |
0c94c8d6 | 1014 | if (buffer_intervals (current_buffer)) |
c669988b KH |
1015 | { |
1016 | offset_intervals (current_buffer, GPT - nchars, nchars); | |
77c7bcb1 | 1017 | graft_intervals_into_buffer (NULL, GPT - nchars, nchars, |
c669988b KH |
1018 | current_buffer, 0); |
1019 | } | |
8f924df7 KH |
1020 | |
1021 | if (GPT - nchars < PT) | |
1022 | adjust_point (nchars, nbytes); | |
1023 | ||
e2688e4a | 1024 | check_markers (); |
b45433b3 | 1025 | } |
3be11131 RS |
1026 | \f |
1027 | /* Insert text from BUF, NCHARS characters starting at CHARPOS, into the | |
ef29f213 KH |
1028 | current buffer. If the text in BUF has properties, they are absorbed |
1029 | into the current buffer. | |
1030 | ||
1031 | It does not work to use `insert' for this, because a malloc could happen | |
72af86bd | 1032 | and relocate BUF's text before the copy happens. */ |
ef29f213 KH |
1033 | |
1034 | void | |
ae19ba7c | 1035 | insert_from_buffer (struct buffer *buf, |
a08d4ba7 | 1036 | ptrdiff_t charpos, ptrdiff_t nchars, bool inherit) |
ef29f213 | 1037 | { |
d311d28c | 1038 | ptrdiff_t opoint = PT; |
3be11131 | 1039 | |
62b82678 RS |
1040 | insert_from_buffer_1 (buf, charpos, nchars, inherit); |
1041 | signal_after_change (opoint, 0, PT - opoint); | |
0ef71121 | 1042 | update_compositions (opoint, PT, CHECK_BORDER); |
ef29f213 KH |
1043 | } |
1044 | ||
1045 | static void | |
ae19ba7c | 1046 | insert_from_buffer_1 (struct buffer *buf, |
a08d4ba7 | 1047 | ptrdiff_t from, ptrdiff_t nchars, bool inherit) |
ef29f213 | 1048 | { |
d311d28c PE |
1049 | ptrdiff_t chunk, chunk_expanded; |
1050 | ptrdiff_t from_byte = buf_charpos_to_bytepos (buf, from); | |
1051 | ptrdiff_t to_byte = buf_charpos_to_bytepos (buf, from + nchars); | |
1052 | ptrdiff_t incoming_nbytes = to_byte - from_byte; | |
1053 | ptrdiff_t outgoing_nbytes = incoming_nbytes; | |
ce97a2d7 | 1054 | INTERVAL intervals; |
2b083808 RS |
1055 | |
1056 | /* Make OUTGOING_NBYTES describe the text | |
1057 | as it will be inserted in this buffer. */ | |
1058 | ||
4b4deea2 | 1059 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
2b083808 | 1060 | outgoing_nbytes = nchars; |
4b4deea2 | 1061 | else if (NILP (BVAR (buf, enable_multibyte_characters))) |
4468c4f1 | 1062 | { |
d311d28c PE |
1063 | ptrdiff_t outgoing_before_gap = 0; |
1064 | ptrdiff_t outgoing_after_gap = 0; | |
ef29f213 | 1065 | |
4468c4f1 KH |
1066 | if (from < BUF_GPT (buf)) |
1067 | { | |
1068 | chunk = BUF_GPT_BYTE (buf) - from_byte; | |
1069 | if (chunk > incoming_nbytes) | |
1070 | chunk = incoming_nbytes; | |
1071 | outgoing_before_gap | |
1072 | = count_size_as_multibyte (BUF_BYTE_ADDRESS (buf, from_byte), | |
1073 | chunk); | |
1074 | } | |
1075 | else | |
1076 | chunk = 0; | |
1077 | ||
1078 | if (chunk < incoming_nbytes) | |
1079 | outgoing_after_gap | |
177c0ea7 | 1080 | = count_size_as_multibyte (BUF_BYTE_ADDRESS (buf, |
4468c4f1 KH |
1081 | from_byte + chunk), |
1082 | incoming_nbytes - chunk); | |
1083 | ||
1084 | outgoing_nbytes = outgoing_before_gap + outgoing_after_gap; | |
1085 | } | |
177c0ea7 | 1086 | |
35d63725 RS |
1087 | /* Do this before moving and increasing the gap, |
1088 | because the before-change hooks might move the gap | |
1089 | or make it smaller. */ | |
d206af14 | 1090 | prepare_to_modify_buffer (PT, PT, NULL); |
ef29f213 KH |
1091 | |
1092 | if (PT != GPT) | |
3be11131 | 1093 | move_gap_both (PT, PT_BYTE); |
2b083808 RS |
1094 | if (GAP_SIZE < outgoing_nbytes) |
1095 | make_gap (outgoing_nbytes - GAP_SIZE); | |
ef29f213 | 1096 | |
3be11131 | 1097 | if (from < BUF_GPT (buf)) |
ef29f213 | 1098 | { |
3be11131 | 1099 | chunk = BUF_GPT_BYTE (buf) - from_byte; |
2b083808 RS |
1100 | if (chunk > incoming_nbytes) |
1101 | chunk = incoming_nbytes; | |
4468c4f1 KH |
1102 | /* Record number of output bytes, so we know where |
1103 | to put the output from the second copy_text. */ | |
1104 | chunk_expanded | |
1105 | = copy_text (BUF_BYTE_ADDRESS (buf, from_byte), | |
1106 | GPT_ADDR, chunk, | |
4b4deea2 TT |
1107 | ! NILP (BVAR (buf, enable_multibyte_characters)), |
1108 | ! NILP (BVAR (current_buffer, enable_multibyte_characters))); | |
ef29f213 KH |
1109 | } |
1110 | else | |
4468c4f1 KH |
1111 | chunk_expanded = chunk = 0; |
1112 | ||
2b083808 RS |
1113 | if (chunk < incoming_nbytes) |
1114 | copy_text (BUF_BYTE_ADDRESS (buf, from_byte + chunk), | |
4468c4f1 | 1115 | GPT_ADDR + chunk_expanded, incoming_nbytes - chunk, |
4b4deea2 TT |
1116 | ! NILP (BVAR (buf, enable_multibyte_characters)), |
1117 | ! NILP (BVAR (current_buffer, enable_multibyte_characters))); | |
ef29f213 | 1118 | |
b16afa45 | 1119 | #ifdef BYTE_COMBINING_DEBUG |
432f78d2 RS |
1120 | /* We have copied text into the gap, but we have not altered |
1121 | PT or PT_BYTE yet. So we can pass PT and PT_BYTE | |
1122 | to these functions and get the same results as we would | |
1f90a790 | 1123 | have got earlier on. Meanwhile, GPT_ADDR does point to |
432f78d2 | 1124 | the text that has been stored by copy_text. */ |
b16afa45 KH |
1125 | if (count_combining_before (GPT_ADDR, outgoing_nbytes, PT, PT_BYTE) |
1126 | || count_combining_after (GPT_ADDR, outgoing_nbytes, PT, PT_BYTE)) | |
1088b922 | 1127 | emacs_abort (); |
b16afa45 | 1128 | #endif |
432f78d2 | 1129 | |
b16afa45 | 1130 | record_insert (PT, nchars); |
432f78d2 | 1131 | MODIFF++; |
3e145152 | 1132 | CHARS_MODIFF = MODIFF; |
432f78d2 | 1133 | |
2b083808 | 1134 | GAP_SIZE -= outgoing_nbytes; |
1f90a790 RS |
1135 | GPT += nchars; |
1136 | ZV += nchars; | |
1137 | Z += nchars; | |
2b083808 RS |
1138 | GPT_BYTE += outgoing_nbytes; |
1139 | ZV_BYTE += outgoing_nbytes; | |
1140 | Z_BYTE += outgoing_nbytes; | |
469ff680 | 1141 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
1f90a790 | 1142 | |
e2688e4a | 1143 | eassert (GPT <= GPT_BYTE); |
1f90a790 | 1144 | |
9dde4e0c KS |
1145 | /* The insert may have been in the unchanged region, so check again. */ |
1146 | if (Z - GPT < END_UNCHANGED) | |
1147 | END_UNCHANGED = Z - GPT; | |
1148 | ||
1f90a790 RS |
1149 | adjust_overlays_for_insert (PT, nchars); |
1150 | adjust_markers_for_insert (PT, PT_BYTE, PT + nchars, | |
432f78d2 | 1151 | PT_BYTE + outgoing_nbytes, |
b16afa45 | 1152 | 0); |
ce97a2d7 | 1153 | |
2f294edf | 1154 | offset_intervals (current_buffer, PT, nchars); |
ce97a2d7 | 1155 | |
b16afa45 | 1156 | /* Get the intervals for the part of the string we are inserting. */ |
0c94c8d6 | 1157 | intervals = buffer_intervals (buf); |
f1a6b216 | 1158 | if (nchars < BUF_Z (buf) - BUF_BEG (buf)) |
06d8227a GM |
1159 | { |
1160 | if (buf == current_buffer && PT <= from) | |
1161 | from += nchars; | |
1162 | intervals = copy_intervals (intervals, from, nchars); | |
1163 | } | |
177c0ea7 | 1164 | |
ce97a2d7 | 1165 | /* Insert those intervals. */ |
1f90a790 | 1166 | graft_intervals_into_buffer (intervals, PT, nchars, current_buffer, inherit); |
ce97a2d7 | 1167 | |
b16afa45 | 1168 | adjust_point (nchars, outgoing_nbytes); |
b45433b3 JB |
1169 | } |
1170 | \f | |
652838b5 KH |
1171 | /* Record undo information and adjust markers and position keepers for |
1172 | a replacement of a text PREV_TEXT at FROM to a new text of LEN | |
1173 | chars (LEN_BYTE bytes) which resides in the gap just after | |
1174 | GPT_ADDR. | |
1175 | ||
1176 | PREV_TEXT nil means the new text was just inserted. */ | |
2d9eea44 | 1177 | |
77382fcc | 1178 | static void |
d311d28c PE |
1179 | adjust_after_replace (ptrdiff_t from, ptrdiff_t from_byte, |
1180 | Lisp_Object prev_text, ptrdiff_t len, ptrdiff_t len_byte) | |
1e9c7b7d | 1181 | { |
d311d28c | 1182 | ptrdiff_t nchars_del = 0, nbytes_del = 0; |
61415a25 | 1183 | |
b16afa45 KH |
1184 | #ifdef BYTE_COMBINING_DEBUG |
1185 | if (count_combining_before (GPT_ADDR, len_byte, from, from_byte) | |
1186 | || count_combining_after (GPT_ADDR, len_byte, from, from_byte)) | |
1088b922 | 1187 | emacs_abort (); |
b16afa45 KH |
1188 | #endif |
1189 | ||
828f1ed3 KH |
1190 | if (STRINGP (prev_text)) |
1191 | { | |
d5db4077 KR |
1192 | nchars_del = SCHARS (prev_text); |
1193 | nbytes_del = SBYTES (prev_text); | |
828f1ed3 KH |
1194 | } |
1195 | ||
61415a25 KH |
1196 | /* Update various buffer positions for the new text. */ |
1197 | GAP_SIZE -= len_byte; | |
1198 | ZV += len; Z+= len; | |
1199 | ZV_BYTE += len_byte; Z_BYTE += len_byte; | |
1200 | GPT += len; GPT_BYTE += len_byte; | |
1201 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ | |
1202 | ||
adee4f91 KH |
1203 | if (nchars_del > 0) |
1204 | adjust_markers_for_replace (from, from_byte, nchars_del, nbytes_del, | |
1205 | len, len_byte); | |
1206 | else | |
1207 | adjust_markers_for_insert (from, from_byte, | |
1208 | from + len, from_byte + len_byte, 0); | |
b16afa45 | 1209 | |
4b4deea2 | 1210 | if (! EQ (BVAR (current_buffer, undo_list), Qt)) |
828f1ed3 | 1211 | { |
828f1ed3 | 1212 | if (nchars_del > 0) |
b16afa45 KH |
1213 | record_delete (from, prev_text); |
1214 | record_insert (from, len); | |
828f1ed3 | 1215 | } |
652838b5 KH |
1216 | |
1217 | if (len > nchars_del) | |
1218 | adjust_overlays_for_insert (from, len - nchars_del); | |
1219 | else if (len < nchars_del) | |
1220 | adjust_overlays_for_delete (from, nchars_del - len); | |
8707c1e5 | 1221 | |
2f294edf | 1222 | offset_intervals (current_buffer, from, len - nchars_del); |
61415a25 | 1223 | |
b16afa45 KH |
1224 | if (from < PT) |
1225 | adjust_point (len - nchars_del, len_byte - nbytes_del); | |
61415a25 | 1226 | |
9f3ede3c | 1227 | /* As byte combining will decrease Z, we must check this again. */ |
a50df55b GM |
1228 | if (Z - GPT < END_UNCHANGED) |
1229 | END_UNCHANGED = Z - GPT; | |
9f3ede3c | 1230 | |
e2688e4a | 1231 | check_markers (); |
60ea6052 | 1232 | |
1e9c7b7d | 1233 | if (len == 0) |
b58e3ca1 RS |
1234 | evaporate_overlays (from); |
1235 | MODIFF++; | |
3e145152 | 1236 | CHARS_MODIFF = MODIFF; |
b58e3ca1 RS |
1237 | } |
1238 | ||
652838b5 KH |
1239 | /* Record undo information, adjust markers and position keepers for an |
1240 | insertion of a text from FROM (FROM_BYTE) to TO (TO_BYTE). The | |
1241 | text already exists in the current buffer but character length (TO | |
1242 | - FROM) may be incorrect, the correct length is NEWLEN. */ | |
1243 | ||
1244 | void | |
d311d28c PE |
1245 | adjust_after_insert (ptrdiff_t from, ptrdiff_t from_byte, |
1246 | ptrdiff_t to, ptrdiff_t to_byte, ptrdiff_t newlen) | |
652838b5 | 1247 | { |
d311d28c | 1248 | ptrdiff_t len = to - from, len_byte = to_byte - from_byte; |
652838b5 KH |
1249 | |
1250 | if (GPT != to) | |
1251 | move_gap_both (to, to_byte); | |
1252 | GAP_SIZE += len_byte; | |
1253 | GPT -= len; GPT_BYTE -= len_byte; | |
1254 | ZV -= len; ZV_BYTE -= len_byte; | |
1255 | Z -= len; Z_BYTE -= len_byte; | |
1256 | adjust_after_replace (from, from_byte, Qnil, newlen, len_byte); | |
1257 | } | |
085db7de | 1258 | \f |
3be11131 | 1259 | /* Replace the text from character positions FROM to TO with NEW, |
a08d4ba7 | 1260 | If PREPARE, call prepare_to_modify_buffer. |
c5ca4d3a RS |
1261 | If INHERIT, the newly inserted text should inherit text properties |
1262 | from the surrounding non-deleted text. */ | |
1263 | ||
1264 | /* Note that this does not yet handle markers quite right. | |
1265 | Also it needs to record a single undo-entry that does a replacement | |
1266 | rather than a separate delete and insert. | |
60aa777a RS |
1267 | That way, undo will also handle markers properly. |
1268 | ||
1269 | But if MARKERS is 0, don't relocate markers. */ | |
c5ca4d3a RS |
1270 | |
1271 | void | |
d311d28c | 1272 | replace_range (ptrdiff_t from, ptrdiff_t to, Lisp_Object new, |
a08d4ba7 | 1273 | bool prepare, bool inherit, bool markers) |
c5ca4d3a | 1274 | { |
d311d28c PE |
1275 | ptrdiff_t inschars = SCHARS (new); |
1276 | ptrdiff_t insbytes = SBYTES (new); | |
1277 | ptrdiff_t from_byte, to_byte; | |
1278 | ptrdiff_t nbytes_del, nchars_del; | |
c5ca4d3a | 1279 | struct gcpro gcpro1; |
ce97a2d7 | 1280 | INTERVAL intervals; |
d311d28c | 1281 | ptrdiff_t outgoing_insbytes = insbytes; |
23b20a70 | 1282 | Lisp_Object deletion; |
c5ca4d3a | 1283 | |
e2688e4a | 1284 | check_markers (); |
60ea6052 | 1285 | |
c5ca4d3a | 1286 | GCPRO1 (new); |
6bbd7a29 | 1287 | deletion = Qnil; |
c5ca4d3a RS |
1288 | |
1289 | if (prepare) | |
1290 | { | |
d311d28c | 1291 | ptrdiff_t range_length = to - from; |
c5ca4d3a RS |
1292 | prepare_to_modify_buffer (from, to, &from); |
1293 | to = from + range_length; | |
1294 | } | |
1295 | ||
3be11131 RS |
1296 | UNGCPRO; |
1297 | ||
b50a28de | 1298 | /* Make args be valid. */ |
c5ca4d3a RS |
1299 | if (from < BEGV) |
1300 | from = BEGV; | |
1301 | if (to > ZV) | |
1302 | to = ZV; | |
1303 | ||
3be11131 RS |
1304 | from_byte = CHAR_TO_BYTE (from); |
1305 | to_byte = CHAR_TO_BYTE (to); | |
c5ca4d3a | 1306 | |
3be11131 RS |
1307 | nchars_del = to - from; |
1308 | nbytes_del = to_byte - from_byte; | |
1309 | ||
1310 | if (nbytes_del <= 0 && insbytes == 0) | |
1311 | return; | |
c5ca4d3a | 1312 | |
1f90a790 RS |
1313 | /* Make OUTGOING_INSBYTES describe the text |
1314 | as it will be inserted in this buffer. */ | |
1315 | ||
4b4deea2 | 1316 | if (NILP (BVAR (current_buffer, enable_multibyte_characters))) |
1f90a790 | 1317 | outgoing_insbytes = inschars; |
2a1d8be0 | 1318 | else if (! STRING_MULTIBYTE (new)) |
1f90a790 | 1319 | outgoing_insbytes |
d5db4077 | 1320 | = count_size_as_multibyte (SDATA (new), insbytes); |
1f90a790 | 1321 | |
c5ca4d3a RS |
1322 | GCPRO1 (new); |
1323 | ||
1324 | /* Make sure the gap is somewhere in or next to what we are deleting. */ | |
1325 | if (from > GPT) | |
3be11131 | 1326 | gap_right (from, from_byte); |
c5ca4d3a | 1327 | if (to < GPT) |
3be11131 | 1328 | gap_left (to, to_byte, 0); |
c5ca4d3a | 1329 | |
039af53a KH |
1330 | /* Even if we don't record for undo, we must keep the original text |
1331 | because we may have to recover it because of inappropriate byte | |
1332 | combining. */ | |
4b4deea2 | 1333 | if (! EQ (BVAR (current_buffer, undo_list), Qt)) |
b16afa45 | 1334 | deletion = make_buffer_string_both (from, from_byte, to, to_byte, 1); |
c5ca4d3a | 1335 | |
3be11131 RS |
1336 | GAP_SIZE += nbytes_del; |
1337 | ZV -= nchars_del; | |
1338 | Z -= nchars_del; | |
1339 | ZV_BYTE -= nbytes_del; | |
1340 | Z_BYTE -= nbytes_del; | |
c5ca4d3a | 1341 | GPT = from; |
3be11131 | 1342 | GPT_BYTE = from_byte; |
017e09ac | 1343 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
c5ca4d3a | 1344 | |
e2688e4a | 1345 | eassert (GPT <= GPT_BYTE); |
3be11131 | 1346 | |
a50df55b GM |
1347 | if (GPT - BEG < BEG_UNCHANGED) |
1348 | BEG_UNCHANGED = GPT - BEG; | |
1349 | if (Z - GPT < END_UNCHANGED) | |
1350 | END_UNCHANGED = Z - GPT; | |
c5ca4d3a | 1351 | |
599a9e4f PE |
1352 | if (GAP_SIZE < outgoing_insbytes) |
1353 | make_gap (outgoing_insbytes - GAP_SIZE); | |
c5ca4d3a | 1354 | |
1f90a790 RS |
1355 | /* Copy the string text into the buffer, perhaps converting |
1356 | between single-byte and multibyte. */ | |
d5db4077 | 1357 | copy_text (SDATA (new), GPT_ADDR, insbytes, |
2a1d8be0 | 1358 | STRING_MULTIBYTE (new), |
4b4deea2 | 1359 | ! NILP (BVAR (current_buffer, enable_multibyte_characters))); |
1f90a790 | 1360 | |
b16afa45 | 1361 | #ifdef BYTE_COMBINING_DEBUG |
255c7dae RS |
1362 | /* We have copied text into the gap, but we have not marked |
1363 | it as part of the buffer. So we can use the old FROM and FROM_BYTE | |
1364 | here, for both the previous text and the following text. | |
1365 | Meanwhile, GPT_ADDR does point to | |
432f78d2 | 1366 | the text that has been stored by copy_text. */ |
b16afa45 KH |
1367 | if (count_combining_before (GPT_ADDR, outgoing_insbytes, from, from_byte) |
1368 | || count_combining_after (GPT_ADDR, outgoing_insbytes, from, from_byte)) | |
1088b922 | 1369 | emacs_abort (); |
b16afa45 | 1370 | #endif |
432f78d2 | 1371 | |
4b4deea2 | 1372 | if (! EQ (BVAR (current_buffer, undo_list), Qt)) |
23b20a70 | 1373 | { |
bec1aca2 RS |
1374 | /* Record the insertion first, so that when we undo, |
1375 | the deletion will be undone first. Thus, undo | |
1376 | will insert before deleting, and thus will keep | |
1377 | the markers before and after this text separate. */ | |
1378 | record_insert (from + SCHARS (deletion), inschars); | |
b16afa45 | 1379 | record_delete (from, deletion); |
23b20a70 | 1380 | } |
c5ca4d3a | 1381 | |
1f90a790 RS |
1382 | GAP_SIZE -= outgoing_insbytes; |
1383 | GPT += inschars; | |
1384 | ZV += inschars; | |
1385 | Z += inschars; | |
1386 | GPT_BYTE += outgoing_insbytes; | |
1387 | ZV_BYTE += outgoing_insbytes; | |
1388 | Z_BYTE += outgoing_insbytes; | |
c5ca4d3a RS |
1389 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
1390 | ||
e2688e4a | 1391 | eassert (GPT <= GPT_BYTE); |
3be11131 | 1392 | |
048a0fbb | 1393 | /* Adjust markers for the deletion and the insertion. */ |
60aa777a | 1394 | if (markers) |
048a0fbb RS |
1395 | adjust_markers_for_replace (from, from_byte, nchars_del, nbytes_del, |
1396 | inschars, outgoing_insbytes); | |
c5ca4d3a | 1397 | |
2f294edf DA |
1398 | /* Adjust the overlay center as needed. This must be done after |
1399 | adjusting the markers that bound the overlays. */ | |
1400 | adjust_overlays_for_delete (from, nchars_del); | |
1401 | adjust_overlays_for_insert (from, inschars); | |
1402 | ||
255c7dae | 1403 | offset_intervals (current_buffer, from, inschars - nchars_del); |
ce97a2d7 RS |
1404 | |
1405 | /* Get the intervals for the part of the string we are inserting-- | |
1406 | not including the combined-before bytes. */ | |
0c94c8d6 | 1407 | intervals = string_intervals (new); |
ce97a2d7 | 1408 | /* Insert those intervals. */ |
1f90a790 | 1409 | graft_intervals_into_buffer (intervals, from, inschars, |
ce97a2d7 | 1410 | current_buffer, inherit); |
c5ca4d3a | 1411 | |
1f90a790 RS |
1412 | /* Relocate point as if it were a marker. */ |
1413 | if (from < PT) | |
8bedbe9d | 1414 | adjust_point ((from + inschars - (PT < to ? PT : to)), |
1f90a790 | 1415 | (from_byte + outgoing_insbytes |
8bedbe9d | 1416 | - (PT_BYTE < to_byte ? PT_BYTE : to_byte))); |
c5ca4d3a | 1417 | |
1f90a790 RS |
1418 | if (outgoing_insbytes == 0) |
1419 | evaporate_overlays (from); | |
93b882e8 | 1420 | |
e2688e4a | 1421 | check_markers (); |
60ea6052 | 1422 | |
c5ca4d3a | 1423 | MODIFF++; |
3e145152 | 1424 | CHARS_MODIFF = MODIFF; |
c5ca4d3a RS |
1425 | UNGCPRO; |
1426 | ||
255c7dae | 1427 | signal_after_change (from, nchars_del, GPT - from); |
0ef71121 | 1428 | update_compositions (from, GPT, CHECK_BORDER); |
c5ca4d3a RS |
1429 | } |
1430 | \f | |
085db7de RS |
1431 | /* Replace the text from character positions FROM to TO with |
1432 | the text in INS of length INSCHARS. | |
1433 | Keep the text properties that applied to the old characters | |
1434 | (extending them to all the new chars if there are more new chars). | |
1435 | ||
1436 | Note that this does not yet handle markers quite right. | |
1437 | ||
a08d4ba7 | 1438 | If MARKERS, relocate markers. |
085db7de RS |
1439 | |
1440 | Unlike most functions at this level, never call | |
1441 | prepare_to_modify_buffer and never call signal_after_change. */ | |
1442 | ||
1443 | void | |
d311d28c PE |
1444 | replace_range_2 (ptrdiff_t from, ptrdiff_t from_byte, |
1445 | ptrdiff_t to, ptrdiff_t to_byte, | |
1446 | const char *ins, ptrdiff_t inschars, ptrdiff_t insbytes, | |
a08d4ba7 | 1447 | bool markers) |
085db7de | 1448 | { |
d311d28c | 1449 | ptrdiff_t nbytes_del, nchars_del; |
085db7de | 1450 | |
e2688e4a | 1451 | check_markers (); |
085db7de RS |
1452 | |
1453 | nchars_del = to - from; | |
1454 | nbytes_del = to_byte - from_byte; | |
1455 | ||
1456 | if (nbytes_del <= 0 && insbytes == 0) | |
1457 | return; | |
1458 | ||
085db7de RS |
1459 | /* Make sure the gap is somewhere in or next to what we are deleting. */ |
1460 | if (from > GPT) | |
1461 | gap_right (from, from_byte); | |
1462 | if (to < GPT) | |
1463 | gap_left (to, to_byte, 0); | |
1464 | ||
1465 | GAP_SIZE += nbytes_del; | |
1466 | ZV -= nchars_del; | |
1467 | Z -= nchars_del; | |
1468 | ZV_BYTE -= nbytes_del; | |
1469 | Z_BYTE -= nbytes_del; | |
1470 | GPT = from; | |
1471 | GPT_BYTE = from_byte; | |
1472 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ | |
1473 | ||
e2688e4a | 1474 | eassert (GPT <= GPT_BYTE); |
085db7de RS |
1475 | |
1476 | if (GPT - BEG < BEG_UNCHANGED) | |
1477 | BEG_UNCHANGED = GPT - BEG; | |
1478 | if (Z - GPT < END_UNCHANGED) | |
1479 | END_UNCHANGED = Z - GPT; | |
1480 | ||
1481 | if (GAP_SIZE < insbytes) | |
1482 | make_gap (insbytes - GAP_SIZE); | |
1483 | ||
1484 | /* Copy the replacement text into the buffer. */ | |
72af86bd | 1485 | memcpy (GPT_ADDR, ins, insbytes); |
085db7de RS |
1486 | |
1487 | #ifdef BYTE_COMBINING_DEBUG | |
1488 | /* We have copied text into the gap, but we have not marked | |
1489 | it as part of the buffer. So we can use the old FROM and FROM_BYTE | |
1490 | here, for both the previous text and the following text. | |
1491 | Meanwhile, GPT_ADDR does point to | |
1492 | the text that has been stored by copy_text. */ | |
1493 | if (count_combining_before (GPT_ADDR, insbytes, from, from_byte) | |
1494 | || count_combining_after (GPT_ADDR, insbytes, from, from_byte)) | |
1088b922 | 1495 | emacs_abort (); |
085db7de RS |
1496 | #endif |
1497 | ||
1498 | GAP_SIZE -= insbytes; | |
1499 | GPT += inschars; | |
1500 | ZV += inschars; | |
1501 | Z += inschars; | |
1502 | GPT_BYTE += insbytes; | |
1503 | ZV_BYTE += insbytes; | |
1504 | Z_BYTE += insbytes; | |
1505 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ | |
1506 | ||
e2688e4a | 1507 | eassert (GPT <= GPT_BYTE); |
085db7de | 1508 | |
2f294edf DA |
1509 | /* Adjust markers for the deletion and the insertion. */ |
1510 | if (markers | |
1511 | && ! (nchars_del == 1 && inschars == 1 && nbytes_del == insbytes)) | |
1512 | adjust_markers_for_replace (from, from_byte, nchars_del, nbytes_del, | |
1513 | inschars, insbytes); | |
1514 | ||
085db7de RS |
1515 | /* Adjust the overlay center as needed. This must be done after |
1516 | adjusting the markers that bound the overlays. */ | |
1517 | if (nchars_del != inschars) | |
1518 | { | |
1519 | adjust_overlays_for_insert (from, inschars); | |
1520 | adjust_overlays_for_delete (from + inschars, nchars_del); | |
1521 | } | |
1522 | ||
085db7de RS |
1523 | offset_intervals (current_buffer, from, inschars - nchars_del); |
1524 | ||
1525 | /* Relocate point as if it were a marker. */ | |
7077904e KH |
1526 | if (from < PT && (nchars_del != inschars || nbytes_del != insbytes)) |
1527 | { | |
1528 | if (PT < to) | |
1529 | /* PT was within the deleted text. Move it to FROM. */ | |
1530 | adjust_point (from - PT, from_byte - PT_BYTE); | |
1531 | else | |
1532 | adjust_point (inschars - nchars_del, insbytes - nbytes_del); | |
1533 | } | |
085db7de RS |
1534 | |
1535 | if (insbytes == 0) | |
1536 | evaporate_overlays (from); | |
1537 | ||
e2688e4a | 1538 | check_markers (); |
085db7de RS |
1539 | |
1540 | MODIFF++; | |
3e145152 | 1541 | CHARS_MODIFF = MODIFF; |
085db7de RS |
1542 | } |
1543 | \f | |
b45433b3 | 1544 | /* Delete characters in current buffer |
3be11131 RS |
1545 | from FROM up to (but not including) TO. |
1546 | If TO comes before FROM, we delete nothing. */ | |
b45433b3 | 1547 | |
c660b094 | 1548 | void |
d311d28c | 1549 | del_range (ptrdiff_t from, ptrdiff_t to) |
47c64747 | 1550 | { |
7dae4502 | 1551 | del_range_1 (from, to, 1, 0); |
47c64747 RS |
1552 | } |
1553 | ||
7dae4502 SM |
1554 | /* Like del_range; PREPARE says whether to call prepare_to_modify_buffer. |
1555 | RET_STRING says to return the deleted text. */ | |
47c64747 | 1556 | |
7dae4502 | 1557 | Lisp_Object |
a08d4ba7 | 1558 | del_range_1 (ptrdiff_t from, ptrdiff_t to, bool prepare, bool ret_string) |
b45433b3 | 1559 | { |
d311d28c | 1560 | ptrdiff_t from_byte, to_byte; |
7dae4502 SM |
1561 | Lisp_Object deletion; |
1562 | struct gcpro gcpro1; | |
3be11131 RS |
1563 | |
1564 | /* Make args be valid */ | |
1565 | if (from < BEGV) | |
1566 | from = BEGV; | |
1567 | if (to > ZV) | |
1568 | to = ZV; | |
1569 | ||
1570 | if (to <= from) | |
7dae4502 | 1571 | return Qnil; |
3be11131 RS |
1572 | |
1573 | if (prepare) | |
1574 | { | |
d311d28c | 1575 | ptrdiff_t range_length = to - from; |
3be11131 | 1576 | prepare_to_modify_buffer (from, to, &from); |
0a411995 | 1577 | to = min (ZV, from + range_length); |
3be11131 RS |
1578 | } |
1579 | ||
1580 | from_byte = CHAR_TO_BYTE (from); | |
1581 | to_byte = CHAR_TO_BYTE (to); | |
1582 | ||
7dae4502 | 1583 | deletion = del_range_2 (from, from_byte, to, to_byte, ret_string); |
5e617bc2 | 1584 | GCPRO1 (deletion); |
9c36993a | 1585 | signal_after_change (from, to - from, 0); |
233cc02d | 1586 | update_compositions (from, from, CHECK_HEAD); |
7dae4502 SM |
1587 | UNGCPRO; |
1588 | return deletion; | |
3be11131 RS |
1589 | } |
1590 | ||
1591 | /* Like del_range_1 but args are byte positions, not char positions. */ | |
1592 | ||
1593 | void | |
a08d4ba7 | 1594 | del_range_byte (ptrdiff_t from_byte, ptrdiff_t to_byte, bool prepare) |
3be11131 | 1595 | { |
d311d28c | 1596 | ptrdiff_t from, to; |
3be11131 RS |
1597 | |
1598 | /* Make args be valid */ | |
1599 | if (from_byte < BEGV_BYTE) | |
1600 | from_byte = BEGV_BYTE; | |
1601 | if (to_byte > ZV_BYTE) | |
1602 | to_byte = ZV_BYTE; | |
1603 | ||
1604 | if (to_byte <= from_byte) | |
1605 | return; | |
1606 | ||
1607 | from = BYTE_TO_CHAR (from_byte); | |
1608 | to = BYTE_TO_CHAR (to_byte); | |
b45433b3 | 1609 | |
d206af14 RS |
1610 | if (prepare) |
1611 | { | |
d311d28c PE |
1612 | ptrdiff_t old_from = from, old_to = Z - to; |
1613 | ptrdiff_t range_length = to - from; | |
d206af14 RS |
1614 | prepare_to_modify_buffer (from, to, &from); |
1615 | to = from + range_length; | |
3be11131 RS |
1616 | |
1617 | if (old_from != from) | |
1618 | from_byte = CHAR_TO_BYTE (from); | |
0a411995 GM |
1619 | if (to > ZV) |
1620 | { | |
1621 | to = ZV; | |
1622 | to_byte = ZV_BYTE; | |
1623 | } | |
1624 | else if (old_to == Z - to) | |
3be11131 | 1625 | to_byte = CHAR_TO_BYTE (to); |
d206af14 RS |
1626 | } |
1627 | ||
7dae4502 | 1628 | del_range_2 (from, from_byte, to, to_byte, 0); |
9c36993a | 1629 | signal_after_change (from, to - from, 0); |
0ef71121 | 1630 | update_compositions (from, from, CHECK_HEAD); |
3be11131 RS |
1631 | } |
1632 | ||
1633 | /* Like del_range_1, but positions are specified both as charpos | |
1634 | and bytepos. */ | |
1635 | ||
1636 | void | |
d311d28c | 1637 | del_range_both (ptrdiff_t from, ptrdiff_t from_byte, |
a08d4ba7 | 1638 | ptrdiff_t to, ptrdiff_t to_byte, bool prepare) |
3be11131 | 1639 | { |
b45433b3 | 1640 | /* Make args be valid */ |
3be11131 RS |
1641 | if (from_byte < BEGV_BYTE) |
1642 | from_byte = BEGV_BYTE; | |
1643 | if (to_byte > ZV_BYTE) | |
1644 | to_byte = ZV_BYTE; | |
1645 | ||
1646 | if (to_byte <= from_byte) | |
1647 | return; | |
1648 | ||
b45433b3 JB |
1649 | if (from < BEGV) |
1650 | from = BEGV; | |
1651 | if (to > ZV) | |
1652 | to = ZV; | |
1653 | ||
3be11131 RS |
1654 | if (prepare) |
1655 | { | |
d311d28c PE |
1656 | ptrdiff_t old_from = from, old_to = Z - to; |
1657 | ptrdiff_t range_length = to - from; | |
3be11131 RS |
1658 | prepare_to_modify_buffer (from, to, &from); |
1659 | to = from + range_length; | |
1660 | ||
1661 | if (old_from != from) | |
1662 | from_byte = CHAR_TO_BYTE (from); | |
0a411995 GM |
1663 | if (to > ZV) |
1664 | { | |
1665 | to = ZV; | |
1666 | to_byte = ZV_BYTE; | |
1667 | } | |
1668 | else if (old_to == Z - to) | |
3be11131 RS |
1669 | to_byte = CHAR_TO_BYTE (to); |
1670 | } | |
1671 | ||
7dae4502 | 1672 | del_range_2 (from, from_byte, to, to_byte, 0); |
9c36993a | 1673 | signal_after_change (from, to - from, 0); |
0ef71121 | 1674 | update_compositions (from, from, CHECK_HEAD); |
3be11131 RS |
1675 | } |
1676 | ||
1677 | /* Delete a range of text, specified both as character positions | |
1678 | and byte positions. FROM and TO are character positions, | |
7dae4502 | 1679 | while FROM_BYTE and TO_BYTE are byte positions. |
a08d4ba7 | 1680 | If RET_STRING, the deleted area is returned as a string. */ |
3be11131 | 1681 | |
7dae4502 | 1682 | Lisp_Object |
d311d28c | 1683 | del_range_2 (ptrdiff_t from, ptrdiff_t from_byte, |
a08d4ba7 | 1684 | ptrdiff_t to, ptrdiff_t to_byte, bool ret_string) |
3be11131 | 1685 | { |
a08d4ba7 | 1686 | ptrdiff_t nbytes_del, nchars_del; |
628cea90 | 1687 | Lisp_Object deletion; |
3be11131 | 1688 | |
e2688e4a | 1689 | check_markers (); |
60ea6052 | 1690 | |
3be11131 RS |
1691 | nchars_del = to - from; |
1692 | nbytes_del = to_byte - from_byte; | |
b45433b3 JB |
1693 | |
1694 | /* Make sure the gap is somewhere in or next to what we are deleting. */ | |
1695 | if (from > GPT) | |
3be11131 | 1696 | gap_right (from, from_byte); |
b45433b3 | 1697 | if (to < GPT) |
3be11131 | 1698 | gap_left (to, to_byte, 0); |
b45433b3 | 1699 | |
b16afa45 KH |
1700 | #ifdef BYTE_COMBINING_DEBUG |
1701 | if (count_combining_before (BUF_BYTE_ADDRESS (current_buffer, to_byte), | |
1702 | Z_BYTE - to_byte, from, from_byte)) | |
1088b922 | 1703 | emacs_abort (); |
b16afa45 | 1704 | #endif |
628cea90 | 1705 | |
4b4deea2 | 1706 | if (ret_string || ! EQ (BVAR (current_buffer, undo_list), Qt)) |
b16afa45 | 1707 | deletion = make_buffer_string_both (from, from_byte, to, to_byte, 1); |
7dae4502 SM |
1708 | else |
1709 | deletion = Qnil; | |
1710 | ||
8948d317 RS |
1711 | /* Relocate all markers pointing into the new, larger gap |
1712 | to point at the end of the text before the gap. | |
3be11131 RS |
1713 | Do this before recording the deletion, |
1714 | so that undo handles this after reinserting the text. */ | |
1715 | adjust_markers_for_delete (from, from_byte, to, to_byte); | |
b16afa45 | 1716 | |
4b4deea2 | 1717 | if (! EQ (BVAR (current_buffer, undo_list), Qt)) |
b16afa45 | 1718 | record_delete (from, deletion); |
be09561e | 1719 | MODIFF++; |
3e145152 | 1720 | CHARS_MODIFF = MODIFF; |
be09561e | 1721 | |
b45433b3 | 1722 | /* Relocate point as if it were a marker. */ |
2bcaed71 | 1723 | if (from < PT) |
3be11131 RS |
1724 | adjust_point (from - (PT < to ? PT : to), |
1725 | from_byte - (PT_BYTE < to_byte ? PT_BYTE : to_byte)); | |
b45433b3 | 1726 | |
3be11131 | 1727 | offset_intervals (current_buffer, from, - nchars_del); |
16032db6 | 1728 | |
adde4858 | 1729 | /* Adjust the overlay center as needed. This must be done after |
a7f38d28 | 1730 | adjusting the markers that bound the overlays. */ |
e3a87305 | 1731 | adjust_overlays_for_delete (from, nchars_del); |
adde4858 | 1732 | |
3be11131 RS |
1733 | GAP_SIZE += nbytes_del; |
1734 | ZV_BYTE -= nbytes_del; | |
1735 | Z_BYTE -= nbytes_del; | |
1736 | ZV -= nchars_del; | |
1737 | Z -= nchars_del; | |
b45433b3 | 1738 | GPT = from; |
3be11131 | 1739 | GPT_BYTE = from_byte; |
b3b58c01 AS |
1740 | if (GAP_SIZE > 0 && !current_buffer->text->inhibit_shrinking) |
1741 | /* Put an anchor, unless called from decode_coding_object which | |
1742 | needs to access the previous gap contents. */ | |
1743 | *(GPT_ADDR) = 0; | |
e3a87305 | 1744 | |
e2688e4a | 1745 | eassert (GPT <= GPT_BYTE); |
3be11131 | 1746 | |
a50df55b GM |
1747 | if (GPT - BEG < BEG_UNCHANGED) |
1748 | BEG_UNCHANGED = GPT - BEG; | |
1749 | if (Z - GPT < END_UNCHANGED) | |
1750 | END_UNCHANGED = Z - GPT; | |
b45433b3 | 1751 | |
e2688e4a | 1752 | check_markers (); |
60ea6052 | 1753 | |
d386034e | 1754 | evaporate_overlays (from); |
7dae4502 SM |
1755 | |
1756 | return deletion; | |
b45433b3 JB |
1757 | } |
1758 | \f | |
3be11131 RS |
1759 | /* Call this if you're about to change the region of BUFFER from |
1760 | character positions START to END. This checks the read-only | |
1761 | properties of the region, calls the necessary modification hooks, | |
1762 | and warns the next redisplay that it should pay attention to that | |
3e145152 CY |
1763 | area. |
1764 | ||
a08d4ba7 | 1765 | If PRESERVE_CHARS_MODIFF, do not update CHARS_MODIFF. |
3e145152 | 1766 | Otherwise set CHARS_MODIFF to the new value of MODIFF. */ |
3be11131 | 1767 | |
c660b094 | 1768 | void |
d311d28c | 1769 | modify_region (struct buffer *buffer, ptrdiff_t start, ptrdiff_t end, |
a08d4ba7 | 1770 | bool preserve_chars_modiff) |
b45433b3 | 1771 | { |
04a759c8 JB |
1772 | struct buffer *old_buffer = current_buffer; |
1773 | ||
a3d794a1 | 1774 | set_buffer_internal (buffer); |
04a759c8 | 1775 | |
d206af14 | 1776 | prepare_to_modify_buffer (start, end, NULL); |
b45433b3 | 1777 | |
a50df55b | 1778 | BUF_COMPUTE_UNCHANGED (buffer, start - 1, end); |
83010cd6 | 1779 | |
9fbf87cd | 1780 | if (MODIFF <= SAVE_MODIFF) |
83010cd6 | 1781 | record_first_change (); |
b45433b3 | 1782 | MODIFF++; |
3e145152 CY |
1783 | if (! preserve_chars_modiff) |
1784 | CHARS_MODIFF = MODIFF; | |
04a759c8 | 1785 | |
39eb03f1 | 1786 | bset_point_before_scroll (buffer, Qnil); |
069cdc4f | 1787 | |
a3d794a1 | 1788 | set_buffer_internal (old_buffer); |
b45433b3 | 1789 | } |
d206af14 | 1790 | \f |
3be11131 RS |
1791 | /* Check that it is okay to modify the buffer between START and END, |
1792 | which are char positions. | |
1793 | ||
679194a6 JA |
1794 | Run the before-change-function, if any. If intervals are in use, |
1795 | verify that the text to be modified is not read-only, and call | |
d206af14 RS |
1796 | any modification properties the text may have. |
1797 | ||
1798 | If PRESERVE_PTR is nonzero, we relocate *PRESERVE_PTR | |
1799 | by holding its value temporarily in a marker. */ | |
b45433b3 | 1800 | |
c660b094 | 1801 | void |
d311d28c PE |
1802 | prepare_to_modify_buffer (ptrdiff_t start, ptrdiff_t end, |
1803 | ptrdiff_t *preserve_ptr) | |
b45433b3 | 1804 | { |
234fb773 CY |
1805 | struct buffer *base_buffer; |
1806 | ||
4b4deea2 | 1807 | if (!NILP (BVAR (current_buffer, read_only))) |
b45433b3 JB |
1808 | Fbarf_if_buffer_read_only (); |
1809 | ||
2e9f55fd GM |
1810 | /* Let redisplay consider other windows than selected_window |
1811 | if modifying another buffer. */ | |
d3d50620 | 1812 | if (XBUFFER (XWINDOW (selected_window)->buffer) != current_buffer) |
2e9f55fd GM |
1813 | ++windows_or_buffers_changed; |
1814 | ||
0c94c8d6 | 1815 | if (buffer_intervals (current_buffer)) |
d206af14 RS |
1816 | { |
1817 | if (preserve_ptr) | |
1818 | { | |
1819 | Lisp_Object preserve_marker; | |
1820 | struct gcpro gcpro1; | |
1821 | preserve_marker = Fcopy_marker (make_number (*preserve_ptr), Qnil); | |
1822 | GCPRO1 (preserve_marker); | |
1823 | verify_interval_modification (current_buffer, start, end); | |
1824 | *preserve_ptr = marker_position (preserve_marker); | |
dab0b04d | 1825 | unchain_marker (XMARKER (preserve_marker)); |
d206af14 RS |
1826 | UNGCPRO; |
1827 | } | |
1828 | else | |
1829 | verify_interval_modification (current_buffer, start, end); | |
1830 | } | |
b45433b3 | 1831 | |
234fb773 CY |
1832 | /* For indirect buffers, use the base buffer to check clashes. */ |
1833 | if (current_buffer->base_buffer != 0) | |
1834 | base_buffer = current_buffer->base_buffer; | |
1835 | else | |
1836 | base_buffer = current_buffer; | |
1837 | ||
b45433b3 | 1838 | #ifdef CLASH_DETECTION |
4b4deea2 | 1839 | if (!NILP (BVAR (base_buffer, file_truename)) |
ab6c5c0c | 1840 | /* Make binding buffer-file-name to nil effective. */ |
4b4deea2 | 1841 | && !NILP (BVAR (base_buffer, filename)) |
9fbf87cd | 1842 | && SAVE_MODIFF >= MODIFF) |
4b4deea2 | 1843 | lock_file (BVAR (base_buffer, file_truename)); |
b45433b3 JB |
1844 | #else |
1845 | /* At least warn if this file has changed on disk since it was visited. */ | |
4b4deea2 | 1846 | if (!NILP (BVAR (base_buffer, filename)) |
9fbf87cd | 1847 | && SAVE_MODIFF >= MODIFF |
d427b66a | 1848 | && NILP (Fverify_visited_file_modtime (Fcurrent_buffer ())) |
4b4deea2 | 1849 | && !NILP (Ffile_exists_p (BVAR (base_buffer, filename)))) |
b45433b3 | 1850 | call1 (intern ("ask-user-about-supersession-threat"), |
4b4deea2 | 1851 | BVAR (base_buffer,filename)); |
b45433b3 JB |
1852 | #endif /* not CLASH_DETECTION */ |
1853 | ||
9852377f | 1854 | /* If `select-active-regions' is non-nil, save the region text. */ |
4b4deea2 | 1855 | if (!NILP (BVAR (current_buffer, mark_active)) |
8b78d5e3 | 1856 | && !inhibit_modification_hooks |
4b4deea2 | 1857 | && XMARKER (BVAR (current_buffer, mark))->buffer |
7c23dd44 CY |
1858 | && NILP (Vsaved_region_selection) |
1859 | && (EQ (Vselect_active_regions, Qonly) | |
1860 | ? EQ (CAR_SAFE (Vtransient_mark_mode), Qonly) | |
1861 | : (!NILP (Vselect_active_regions) | |
1862 | && !NILP (Vtransient_mark_mode)))) | |
9852377f | 1863 | { |
d311d28c PE |
1864 | ptrdiff_t b = XMARKER (BVAR (current_buffer, mark))->charpos; |
1865 | ptrdiff_t e = PT; | |
746812d9 CY |
1866 | if (b < e) |
1867 | Vsaved_region_selection = make_buffer_string (b, e, 0); | |
1868 | else if (b > e) | |
1869 | Vsaved_region_selection = make_buffer_string (e, b, 0); | |
9852377f CY |
1870 | } |
1871 | ||
d206af14 | 1872 | signal_before_change (start, end, preserve_ptr); |
2f545eea | 1873 | |
56e1065e JB |
1874 | if (current_buffer->newline_cache) |
1875 | invalidate_region_cache (current_buffer, | |
1876 | current_buffer->newline_cache, | |
1877 | start - BEG, Z - end); | |
1878 | if (current_buffer->width_run_cache) | |
1879 | invalidate_region_cache (current_buffer, | |
1880 | current_buffer->width_run_cache, | |
1881 | start - BEG, Z - end); | |
1882 | ||
2f545eea | 1883 | Vdeactivate_mark = Qt; |
b45433b3 JB |
1884 | } |
1885 | \f | |
d206af14 RS |
1886 | /* These macros work with an argument named `preserve_ptr' |
1887 | and a local variable named `preserve_marker'. */ | |
1888 | ||
1889 | #define PRESERVE_VALUE \ | |
1890 | if (preserve_ptr && NILP (preserve_marker)) \ | |
1891 | preserve_marker = Fcopy_marker (make_number (*preserve_ptr), Qnil) | |
1892 | ||
1893 | #define RESTORE_VALUE \ | |
1894 | if (! NILP (preserve_marker)) \ | |
1895 | { \ | |
1896 | *preserve_ptr = marker_position (preserve_marker); \ | |
dab0b04d | 1897 | unchain_marker (XMARKER (preserve_marker)); \ |
d206af14 RS |
1898 | } |
1899 | ||
b86e0aaf RS |
1900 | #define PRESERVE_START_END \ |
1901 | if (NILP (start_marker)) \ | |
1902 | start_marker = Fcopy_marker (start, Qnil); \ | |
1903 | if (NILP (end_marker)) \ | |
1904 | end_marker = Fcopy_marker (end, Qnil); | |
1905 | ||
1906 | #define FETCH_START \ | |
1907 | (! NILP (start_marker) ? Fmarker_position (start_marker) : start) | |
1908 | ||
1909 | #define FETCH_END \ | |
1910 | (! NILP (end_marker) ? Fmarker_position (end_marker) : end) | |
1911 | ||
4a181359 | 1912 | /* Set a variable to nil if an error occurred. |
e6d3f090 SM |
1913 | Don't change the variable if there was no error. |
1914 | VAL is a cons-cell (VARIABLE . NO-ERROR-FLAG). | |
1915 | VARIABLE is the variable to maybe set to nil. | |
1916 | NO-ERROR-FLAG is nil if there was an error, | |
1917 | anything else meaning no error (so this function does nothing). */ | |
85876d07 | 1918 | static Lisp_Object |
971de7fb | 1919 | reset_var_on_error (Lisp_Object val) |
4a181359 SM |
1920 | { |
1921 | if (NILP (XCDR (val))) | |
1922 | Fset (XCAR (val), Qnil); | |
1923 | return Qnil; | |
1924 | } | |
1925 | ||
eb8c3be9 | 1926 | /* Signal a change to the buffer immediately before it happens. |
d206af14 RS |
1927 | START_INT and END_INT are the bounds of the text to be changed. |
1928 | ||
1929 | If PRESERVE_PTR is nonzero, we relocate *PRESERVE_PTR | |
1930 | by holding its value temporarily in a marker. */ | |
b45433b3 | 1931 | |
4889fc82 | 1932 | static void |
d311d28c PE |
1933 | signal_before_change (ptrdiff_t start_int, ptrdiff_t end_int, |
1934 | ptrdiff_t *preserve_ptr) | |
b45433b3 | 1935 | { |
fb4ee5cd | 1936 | Lisp_Object start, end; |
b86e0aaf | 1937 | Lisp_Object start_marker, end_marker; |
d206af14 | 1938 | Lisp_Object preserve_marker; |
b86e0aaf | 1939 | struct gcpro gcpro1, gcpro2, gcpro3; |
d311d28c | 1940 | ptrdiff_t count = SPECPDL_INDEX (); |
fb4ee5cd | 1941 | |
fd16a4c6 KH |
1942 | if (inhibit_modification_hooks) |
1943 | return; | |
1944 | ||
fb4ee5cd RS |
1945 | start = make_number (start_int); |
1946 | end = make_number (end_int); | |
d206af14 | 1947 | preserve_marker = Qnil; |
b86e0aaf RS |
1948 | start_marker = Qnil; |
1949 | end_marker = Qnil; | |
1950 | GCPRO3 (preserve_marker, start_marker, end_marker); | |
fb4ee5cd | 1951 | |
4a181359 SM |
1952 | specbind (Qinhibit_modification_hooks, Qt); |
1953 | ||
dee091a3 JD |
1954 | /* If buffer is unmodified, run a special hook for that case. The |
1955 | check for Vfirst_change_hook is just a minor optimization. */ | |
9fbf87cd | 1956 | if (SAVE_MODIFF >= MODIFF |
dee091a3 | 1957 | && !NILP (Vfirst_change_hook)) |
d206af14 RS |
1958 | { |
1959 | PRESERVE_VALUE; | |
b86e0aaf | 1960 | PRESERVE_START_END; |
dee091a3 | 1961 | Frun_hooks (1, &Qfirst_change_hook); |
d206af14 | 1962 | } |
dbc4e1c1 | 1963 | |
3d1e2d9c | 1964 | /* Now run the before-change-functions if any. */ |
e45fb8bf RS |
1965 | if (!NILP (Vbefore_change_functions)) |
1966 | { | |
3d1e2d9c | 1967 | Lisp_Object args[3]; |
4a181359 | 1968 | Lisp_Object rvoe_arg = Fcons (Qbefore_change_functions, Qnil); |
3d1e2d9c | 1969 | |
d206af14 | 1970 | PRESERVE_VALUE; |
b86e0aaf | 1971 | PRESERVE_START_END; |
d206af14 | 1972 | |
4a181359 SM |
1973 | /* Mark before-change-functions to be reset to nil in case of error. */ |
1974 | record_unwind_protect (reset_var_on_error, rvoe_arg); | |
3d1e2d9c RS |
1975 | |
1976 | /* Actually run the hook functions. */ | |
1977 | args[0] = Qbefore_change_functions; | |
b86e0aaf RS |
1978 | args[1] = FETCH_START; |
1979 | args[2] = FETCH_END; | |
4a181359 | 1980 | Frun_hook_with_args (3, args); |
3d1e2d9c | 1981 | |
4a181359 SM |
1982 | /* There was no error: unarm the reset_on_error. */ |
1983 | XSETCDR (rvoe_arg, Qt); | |
e45fb8bf | 1984 | } |
d07c0804 | 1985 | |
4cb3e6b3 | 1986 | if (buffer_has_overlays ()) |
d206af14 RS |
1987 | { |
1988 | PRESERVE_VALUE; | |
b86e0aaf RS |
1989 | report_overlay_modification (FETCH_START, FETCH_END, 0, |
1990 | FETCH_START, FETCH_END, Qnil); | |
d206af14 RS |
1991 | } |
1992 | ||
b86e0aaf RS |
1993 | if (! NILP (start_marker)) |
1994 | free_marker (start_marker); | |
1995 | if (! NILP (end_marker)) | |
1996 | free_marker (end_marker); | |
d206af14 RS |
1997 | RESTORE_VALUE; |
1998 | UNGCPRO; | |
4a181359 SM |
1999 | |
2000 | unbind_to (count, Qnil); | |
b45433b3 JB |
2001 | } |
2002 | ||
eb8c3be9 | 2003 | /* Signal a change immediately after it happens. |
3be11131 | 2004 | CHARPOS is the character position of the start of the changed text. |
b45433b3 JB |
2005 | LENDEL is the number of characters of the text before the change. |
2006 | (Not the whole buffer; just the part that was changed.) | |
8b09e5d0 RS |
2007 | LENINS is the number of characters in that part of the text |
2008 | after the change. */ | |
b45433b3 | 2009 | |
c660b094 | 2010 | void |
d311d28c | 2011 | signal_after_change (ptrdiff_t charpos, ptrdiff_t lendel, ptrdiff_t lenins) |
b45433b3 | 2012 | { |
d311d28c | 2013 | ptrdiff_t count = SPECPDL_INDEX (); |
fd16a4c6 KH |
2014 | if (inhibit_modification_hooks) |
2015 | return; | |
2016 | ||
fb2e7d14 RS |
2017 | /* If we are deferring calls to the after-change functions |
2018 | and there are no before-change functions, | |
2019 | just record the args that we were going to use. */ | |
2020 | if (! NILP (Vcombine_after_change_calls) | |
1675d086 | 2021 | && NILP (Vbefore_change_functions) |
4cb3e6b3 | 2022 | && !buffer_has_overlays ()) |
fb2e7d14 RS |
2023 | { |
2024 | Lisp_Object elt; | |
2025 | ||
2026 | if (!NILP (combine_after_change_list) | |
2027 | && current_buffer != XBUFFER (combine_after_change_buffer)) | |
2028 | Fcombine_after_change_execute (); | |
2029 | ||
3be11131 RS |
2030 | elt = Fcons (make_number (charpos - BEG), |
2031 | Fcons (make_number (Z - (charpos - lendel + lenins)), | |
fb2e7d14 RS |
2032 | Fcons (make_number (lenins - lendel), Qnil))); |
2033 | combine_after_change_list | |
2034 | = Fcons (elt, combine_after_change_list); | |
2035 | combine_after_change_buffer = Fcurrent_buffer (); | |
2036 | ||
2037 | return; | |
2038 | } | |
2039 | ||
177c0ea7 | 2040 | if (!NILP (combine_after_change_list)) |
fb2e7d14 RS |
2041 | Fcombine_after_change_execute (); |
2042 | ||
4a181359 SM |
2043 | specbind (Qinhibit_modification_hooks, Qt); |
2044 | ||
e45fb8bf RS |
2045 | if (!NILP (Vafter_change_functions)) |
2046 | { | |
3d1e2d9c | 2047 | Lisp_Object args[4]; |
4a181359 SM |
2048 | Lisp_Object rvoe_arg = Fcons (Qafter_change_functions, Qnil); |
2049 | ||
2050 | /* Mark after-change-functions to be reset to nil in case of error. */ | |
2051 | record_unwind_protect (reset_var_on_error, rvoe_arg); | |
3d1e2d9c RS |
2052 | |
2053 | /* Actually run the hook functions. */ | |
2054 | args[0] = Qafter_change_functions; | |
3be11131 RS |
2055 | XSETFASTINT (args[1], charpos); |
2056 | XSETFASTINT (args[2], charpos + lenins); | |
3d1e2d9c | 2057 | XSETFASTINT (args[3], lendel); |
4a181359 | 2058 | Frun_hook_with_args (4, args); |
3d1e2d9c | 2059 | |
4a181359 SM |
2060 | /* There was no error: unarm the reset_on_error. */ |
2061 | XSETCDR (rvoe_arg, Qt); | |
e45fb8bf | 2062 | } |
d07c0804 | 2063 | |
4cb3e6b3 | 2064 | if (buffer_has_overlays ()) |
3be11131 RS |
2065 | report_overlay_modification (make_number (charpos), |
2066 | make_number (charpos + lenins), | |
d07c0804 | 2067 | 1, |
3be11131 RS |
2068 | make_number (charpos), |
2069 | make_number (charpos + lenins), | |
d07c0804 | 2070 | make_number (lendel)); |
c5ca0786 RS |
2071 | |
2072 | /* After an insertion, call the text properties | |
2073 | insert-behind-hooks or insert-in-front-hooks. */ | |
2074 | if (lendel == 0) | |
d6b81c0f AS |
2075 | report_interval_modification (make_number (charpos), |
2076 | make_number (charpos + lenins)); | |
4a181359 SM |
2077 | |
2078 | unbind_to (count, Qnil); | |
b45433b3 | 2079 | } |
fb2e7d14 | 2080 | |
85876d07 | 2081 | static Lisp_Object |
971de7fb | 2082 | Fcombine_after_change_execute_1 (Lisp_Object val) |
fb2e7d14 RS |
2083 | { |
2084 | Vcombine_after_change_calls = val; | |
2085 | return val; | |
2086 | } | |
2087 | ||
2088 | DEFUN ("combine-after-change-execute", Fcombine_after_change_execute, | |
335c5470 PJ |
2089 | Scombine_after_change_execute, 0, 0, 0, |
2090 | doc: /* This function is for use internally in `combine-after-change-calls'. */) | |
5842a27b | 2091 | (void) |
fb2e7d14 | 2092 | { |
d311d28c PE |
2093 | ptrdiff_t count = SPECPDL_INDEX (); |
2094 | ptrdiff_t beg, end, change; | |
2095 | ptrdiff_t begpos, endpos; | |
fb2e7d14 RS |
2096 | Lisp_Object tail; |
2097 | ||
101e446f KH |
2098 | if (NILP (combine_after_change_list)) |
2099 | return Qnil; | |
2100 | ||
c47a9ed1 CY |
2101 | /* It is rare for combine_after_change_buffer to be invalid, but |
2102 | possible. It can happen when combine-after-change-calls is | |
2103 | non-nil, and insertion calls a file handler (e.g. through | |
2104 | lock_file) which scribbles into a temp file -- cyd */ | |
2105 | if (!BUFFERP (combine_after_change_buffer) | |
e578f381 | 2106 | || !BUFFER_LIVE_P (XBUFFER (combine_after_change_buffer))) |
c47a9ed1 CY |
2107 | { |
2108 | combine_after_change_list = Qnil; | |
2109 | return Qnil; | |
2110 | } | |
2111 | ||
66322887 | 2112 | record_unwind_current_buffer (); |
fb2e7d14 RS |
2113 | |
2114 | Fset_buffer (combine_after_change_buffer); | |
2115 | ||
2116 | /* # chars unchanged at beginning of buffer. */ | |
2117 | beg = Z - BEG; | |
2118 | /* # chars unchanged at end of buffer. */ | |
2119 | end = beg; | |
2120 | /* Total amount of insertion (negative for deletion). */ | |
2121 | change = 0; | |
2122 | ||
2123 | /* Scan the various individual changes, | |
2124 | accumulating the range info in BEG, END and CHANGE. */ | |
2125 | for (tail = combine_after_change_list; CONSP (tail); | |
03699b14 | 2126 | tail = XCDR (tail)) |
fb2e7d14 | 2127 | { |
e688a080 | 2128 | Lisp_Object elt; |
d311d28c | 2129 | ptrdiff_t thisbeg, thisend, thischange; |
fb2e7d14 RS |
2130 | |
2131 | /* Extract the info from the next element. */ | |
03699b14 | 2132 | elt = XCAR (tail); |
fb2e7d14 RS |
2133 | if (! CONSP (elt)) |
2134 | continue; | |
03699b14 | 2135 | thisbeg = XINT (XCAR (elt)); |
fb2e7d14 | 2136 | |
03699b14 | 2137 | elt = XCDR (elt); |
fb2e7d14 RS |
2138 | if (! CONSP (elt)) |
2139 | continue; | |
03699b14 | 2140 | thisend = XINT (XCAR (elt)); |
fb2e7d14 | 2141 | |
03699b14 | 2142 | elt = XCDR (elt); |
fb2e7d14 RS |
2143 | if (! CONSP (elt)) |
2144 | continue; | |
03699b14 | 2145 | thischange = XINT (XCAR (elt)); |
fb2e7d14 RS |
2146 | |
2147 | /* Merge this range into the accumulated range. */ | |
2148 | change += thischange; | |
2149 | if (thisbeg < beg) | |
2150 | beg = thisbeg; | |
2151 | if (thisend < end) | |
2152 | end = thisend; | |
2153 | } | |
2154 | ||
2155 | /* Get the current start and end positions of the range | |
2156 | that was changed. */ | |
2157 | begpos = BEG + beg; | |
2158 | endpos = Z - end; | |
177c0ea7 | 2159 | |
fb2e7d14 RS |
2160 | /* We are about to handle these, so discard them. */ |
2161 | combine_after_change_list = Qnil; | |
2162 | ||
2163 | /* Now run the after-change functions for real. | |
2164 | Turn off the flag that defers them. */ | |
2165 | record_unwind_protect (Fcombine_after_change_execute_1, | |
2166 | Vcombine_after_change_calls); | |
2167 | signal_after_change (begpos, endpos - begpos - change, endpos - begpos); | |
0ef71121 | 2168 | update_compositions (begpos, endpos, CHECK_ALL); |
fb2e7d14 | 2169 | |
101e446f | 2170 | return unbind_to (count, Qnil); |
fb2e7d14 RS |
2171 | } |
2172 | \f | |
dfcf069d | 2173 | void |
971de7fb | 2174 | syms_of_insdel (void) |
fb2e7d14 RS |
2175 | { |
2176 | staticpro (&combine_after_change_list); | |
bf0bf758 | 2177 | staticpro (&combine_after_change_buffer); |
fb2e7d14 | 2178 | combine_after_change_list = Qnil; |
101e446f | 2179 | combine_after_change_buffer = Qnil; |
fb2e7d14 | 2180 | |
29208e82 | 2181 | DEFVAR_LISP ("combine-after-change-calls", Vcombine_after_change_calls, |
335c5470 | 2182 | doc: /* Used internally by the `combine-after-change-calls' macro. */); |
fb2e7d14 RS |
2183 | Vcombine_after_change_calls = Qnil; |
2184 | ||
29208e82 | 2185 | DEFVAR_BOOL ("inhibit-modification-hooks", inhibit_modification_hooks, |
335c5470 PJ |
2186 | doc: /* Non-nil means don't run any of the hooks that respond to buffer changes. |
2187 | This affects `before-change-functions' and `after-change-functions', | |
2188 | as well as hooks attached to text properties and overlays. */); | |
7baf49cf | 2189 | inhibit_modification_hooks = 0; |
cd3520a4 | 2190 | DEFSYM (Qinhibit_modification_hooks, "inhibit-modification-hooks"); |
7baf49cf | 2191 | |
fb2e7d14 RS |
2192 | defsubr (&Scombine_after_change_execute); |
2193 | } |