Commit | Line | Data |
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b45433b3 | 1 | /* Buffer insertion/deletion and gap motion for GNU Emacs. |
4a2f9c6a | 2 | Copyright (C) 1985, 86, 93, 94, 95, 97, 1998 Free Software Foundation, Inc. |
b45433b3 JB |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
7c938215 | 8 | the Free Software Foundation; either version 2, or (at your option) |
b45433b3 JB |
9 | any later version. |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
3b7ad313 EN |
18 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
19 | Boston, MA 02111-1307, USA. */ | |
b45433b3 JB |
20 | |
21 | ||
18160b98 | 22 | #include <config.h> |
b45433b3 | 23 | #include "lisp.h" |
679194a6 | 24 | #include "intervals.h" |
b45433b3 | 25 | #include "buffer.h" |
469ff680 | 26 | #include "charset.h" |
b45433b3 | 27 | #include "window.h" |
d014bf88 | 28 | #include "blockinput.h" |
b45433b3 | 29 | |
d206af14 RS |
30 | #ifndef NULL |
31 | #define NULL 0 | |
32 | #endif | |
33 | ||
14f6194b RS |
34 | #define min(x, y) ((x) < (y) ? (x) : (y)) |
35 | ||
2b083808 | 36 | static void insert_from_string_1 P_ ((Lisp_Object, int, int, int, int, int, int)); |
ef29f213 | 37 | static void insert_from_buffer_1 (); |
3be11131 RS |
38 | static void gap_left P_ ((int, int, int)); |
39 | static void gap_right P_ ((int, int)); | |
40 | static void adjust_markers_gap_motion P_ ((int, int, int)); | |
41 | static void adjust_markers_for_insert P_ ((int, int, int, int, int)); | |
42 | static void adjust_markers_for_delete P_ ((int, int, int, int)); | |
43 | static void adjust_point P_ ((int, int)); | |
395ec62e | 44 | |
fb2e7d14 RS |
45 | Lisp_Object Fcombine_after_change_execute (); |
46 | ||
47 | /* Non-nil means don't call the after-change-functions right away, | |
48 | just record an element in Vcombine_after_change_calls_list. */ | |
49 | Lisp_Object Vcombine_after_change_calls; | |
50 | ||
51 | /* List of elements of the form (BEG-UNCHANGED END-UNCHANGED CHANGE-AMOUNT) | |
52 | describing changes which happened while combine_after_change_calls | |
53 | was nonzero. We use this to decide how to call them | |
54 | once the deferral ends. | |
55 | ||
56 | In each element. | |
57 | BEG-UNCHANGED is the number of chars before the changed range. | |
58 | END-UNCHANGED is the number of chars after the changed range, | |
59 | and CHANGE-AMOUNT is the number of characters inserted by the change | |
60 | (negative for a deletion). */ | |
61 | Lisp_Object combine_after_change_list; | |
62 | ||
63 | /* Buffer which combine_after_change_list is about. */ | |
64 | Lisp_Object combine_after_change_buffer; | |
65 | ||
2b083808 RS |
66 | #define DEFAULT_NONASCII_INSERT_OFFSET 0x800 |
67 | \f | |
3be11131 | 68 | /* Move gap to position CHARPOS. |
b45433b3 JB |
69 | Note that this can quit! */ |
70 | ||
c660b094 | 71 | void |
3be11131 RS |
72 | move_gap (charpos) |
73 | int charpos; | |
b45433b3 | 74 | { |
3be11131 | 75 | move_gap_both (charpos, charpos_to_bytepos (charpos)); |
b45433b3 JB |
76 | } |
77 | ||
3be11131 RS |
78 | /* Move gap to byte position BYTEPOS, which is also char position CHARPOS. |
79 | Note that this can quit! */ | |
80 | ||
81 | void | |
82 | move_gap_both (charpos, bytepos) | |
83 | int charpos, bytepos; | |
84 | { | |
85 | if (bytepos < GPT_BYTE) | |
86 | gap_left (charpos, bytepos, 0); | |
87 | else if (bytepos > GPT_BYTE) | |
88 | gap_right (charpos, bytepos); | |
89 | } | |
90 | ||
91 | /* Move the gap to a position less than the current GPT. | |
92 | BYTEPOS describes the new position as a byte position, | |
93 | and CHARPOS is the corresponding char position. | |
b45433b3 JB |
94 | If NEWGAP is nonzero, then don't update beg_unchanged and end_unchanged. */ |
95 | ||
2bcaed71 | 96 | static void |
3be11131 RS |
97 | gap_left (charpos, bytepos, newgap) |
98 | register int charpos, bytepos; | |
b45433b3 JB |
99 | int newgap; |
100 | { | |
101 | register unsigned char *to, *from; | |
102 | register int i; | |
103 | int new_s1; | |
104 | ||
b45433b3 JB |
105 | if (!newgap) |
106 | { | |
894ab630 RS |
107 | if (unchanged_modified == MODIFF |
108 | && overlay_unchanged_modified == OVERLAY_MODIFF) | |
b45433b3 | 109 | { |
3be11131 RS |
110 | beg_unchanged = charpos - BEG; |
111 | end_unchanged = Z - charpos; | |
b45433b3 JB |
112 | } |
113 | else | |
114 | { | |
115 | if (Z - GPT < end_unchanged) | |
116 | end_unchanged = Z - GPT; | |
3be11131 RS |
117 | if (charpos < beg_unchanged) |
118 | beg_unchanged = charpos - BEG; | |
b45433b3 JB |
119 | } |
120 | } | |
121 | ||
3be11131 | 122 | i = GPT_BYTE; |
b45433b3 JB |
123 | to = GAP_END_ADDR; |
124 | from = GPT_ADDR; | |
3be11131 | 125 | new_s1 = GPT_BYTE; |
b45433b3 JB |
126 | |
127 | /* Now copy the characters. To move the gap down, | |
128 | copy characters up. */ | |
129 | ||
130 | while (1) | |
131 | { | |
132 | /* I gets number of characters left to copy. */ | |
3be11131 | 133 | i = new_s1 - bytepos; |
b45433b3 JB |
134 | if (i == 0) |
135 | break; | |
136 | /* If a quit is requested, stop copying now. | |
3be11131 | 137 | Change BYTEPOS to be where we have actually moved the gap to. */ |
b45433b3 JB |
138 | if (QUITP) |
139 | { | |
3be11131 RS |
140 | bytepos = new_s1; |
141 | charpos = BYTE_TO_CHAR (bytepos); | |
b45433b3 JB |
142 | break; |
143 | } | |
144 | /* Move at most 32000 chars before checking again for a quit. */ | |
145 | if (i > 32000) | |
146 | i = 32000; | |
147 | #ifdef GAP_USE_BCOPY | |
148 | if (i >= 128 | |
149 | /* bcopy is safe if the two areas of memory do not overlap | |
150 | or on systems where bcopy is always safe for moving upward. */ | |
151 | && (BCOPY_UPWARD_SAFE | |
152 | || to - from >= 128)) | |
153 | { | |
154 | /* If overlap is not safe, avoid it by not moving too many | |
155 | characters at once. */ | |
156 | if (!BCOPY_UPWARD_SAFE && i > to - from) | |
157 | i = to - from; | |
158 | new_s1 -= i; | |
159 | from -= i, to -= i; | |
160 | bcopy (from, to, i); | |
161 | } | |
162 | else | |
163 | #endif | |
164 | { | |
165 | new_s1 -= i; | |
166 | while (--i >= 0) | |
167 | *--to = *--from; | |
168 | } | |
169 | } | |
170 | ||
3be11131 RS |
171 | /* Adjust markers, and buffer data structure, to put the gap at BYTEPOS. |
172 | BYTEPOS is where the loop above stopped, which may be what was specified | |
b45433b3 | 173 | or may be where a quit was detected. */ |
3be11131 RS |
174 | adjust_markers_gap_motion (bytepos, GPT_BYTE, GAP_SIZE); |
175 | GPT_BYTE = bytepos; | |
176 | GPT = charpos; | |
177 | if (bytepos < charpos) | |
178 | abort (); | |
469ff680 | 179 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
b45433b3 JB |
180 | QUIT; |
181 | } | |
182 | ||
3be11131 RS |
183 | /* Move the gap to a position greater than than the current GPT. |
184 | BYTEPOS describes the new position as a byte position, | |
185 | and CHARPOS is the corresponding char position. */ | |
186 | ||
2bcaed71 | 187 | static void |
3be11131 RS |
188 | gap_right (charpos, bytepos) |
189 | register int charpos, bytepos; | |
b45433b3 JB |
190 | { |
191 | register unsigned char *to, *from; | |
192 | register int i; | |
193 | int new_s1; | |
194 | ||
894ab630 RS |
195 | if (unchanged_modified == MODIFF |
196 | && overlay_unchanged_modified == OVERLAY_MODIFF) | |
b45433b3 | 197 | { |
3be11131 RS |
198 | beg_unchanged = charpos - BEG; |
199 | end_unchanged = Z - charpos; | |
b45433b3 JB |
200 | } |
201 | else | |
202 | { | |
3be11131 RS |
203 | if (Z - charpos - 1 < end_unchanged) |
204 | end_unchanged = Z - charpos; | |
b45433b3 JB |
205 | if (GPT - BEG < beg_unchanged) |
206 | beg_unchanged = GPT - BEG; | |
207 | } | |
208 | ||
3be11131 | 209 | i = GPT_BYTE; |
b45433b3 JB |
210 | from = GAP_END_ADDR; |
211 | to = GPT_ADDR; | |
3be11131 | 212 | new_s1 = GPT_BYTE; |
b45433b3 JB |
213 | |
214 | /* Now copy the characters. To move the gap up, | |
215 | copy characters down. */ | |
216 | ||
217 | while (1) | |
218 | { | |
219 | /* I gets number of characters left to copy. */ | |
3be11131 | 220 | i = bytepos - new_s1; |
b45433b3 JB |
221 | if (i == 0) |
222 | break; | |
223 | /* If a quit is requested, stop copying now. | |
3be11131 | 224 | Change BYTEPOS to be where we have actually moved the gap to. */ |
b45433b3 JB |
225 | if (QUITP) |
226 | { | |
3be11131 RS |
227 | bytepos = new_s1; |
228 | charpos = BYTE_TO_CHAR (bytepos); | |
b45433b3 JB |
229 | break; |
230 | } | |
231 | /* Move at most 32000 chars before checking again for a quit. */ | |
232 | if (i > 32000) | |
233 | i = 32000; | |
234 | #ifdef GAP_USE_BCOPY | |
235 | if (i >= 128 | |
236 | /* bcopy is safe if the two areas of memory do not overlap | |
237 | or on systems where bcopy is always safe for moving downward. */ | |
238 | && (BCOPY_DOWNWARD_SAFE | |
239 | || from - to >= 128)) | |
240 | { | |
241 | /* If overlap is not safe, avoid it by not moving too many | |
242 | characters at once. */ | |
243 | if (!BCOPY_DOWNWARD_SAFE && i > from - to) | |
244 | i = from - to; | |
245 | new_s1 += i; | |
246 | bcopy (from, to, i); | |
247 | from += i, to += i; | |
248 | } | |
249 | else | |
250 | #endif | |
251 | { | |
252 | new_s1 += i; | |
253 | while (--i >= 0) | |
254 | *to++ = *from++; | |
255 | } | |
256 | } | |
257 | ||
3be11131 RS |
258 | adjust_markers_gap_motion (GPT_BYTE + GAP_SIZE, bytepos + GAP_SIZE, |
259 | - GAP_SIZE); | |
260 | GPT = charpos; | |
261 | GPT_BYTE = bytepos; | |
262 | if (bytepos < charpos) | |
263 | abort (); | |
469ff680 | 264 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
b45433b3 JB |
265 | QUIT; |
266 | } | |
2b083808 | 267 | \f |
3be11131 RS |
268 | /* Add AMOUNT to the byte position of every marker in the current buffer |
269 | whose current byte position is between FROM (exclusive) and TO (inclusive). | |
8948d317 | 270 | |
b45433b3 JB |
271 | Also, any markers past the outside of that interval, in the direction |
272 | of adjustment, are first moved back to the near end of the interval | |
8948d317 RS |
273 | and then adjusted by AMOUNT. |
274 | ||
275 | When the latter adjustment is done, if AMOUNT is negative, | |
276 | we record the adjustment for undo. (This case happens only for | |
3be11131 RS |
277 | deletion.) |
278 | ||
279 | The markers' character positions are not altered, | |
280 | because gap motion does not affect character positions. */ | |
281 | ||
282 | int adjust_markers_test; | |
b45433b3 | 283 | |
2bcaed71 | 284 | static void |
3be11131 | 285 | adjust_markers_gap_motion (from, to, amount) |
b45433b3 JB |
286 | register int from, to, amount; |
287 | { | |
80f6e77c RS |
288 | /* Now that a marker has a bytepos, not counting the gap, |
289 | nothing needs to be done here. */ | |
290 | #if 0 | |
b45433b3 JB |
291 | Lisp_Object marker; |
292 | register struct Lisp_Marker *m; | |
293 | register int mpos; | |
294 | ||
9fbf87cd | 295 | marker = BUF_MARKERS (current_buffer); |
b45433b3 | 296 | |
d427b66a | 297 | while (!NILP (marker)) |
b45433b3 JB |
298 | { |
299 | m = XMARKER (marker); | |
80f6e77c | 300 | mpos = m->bytepos; |
b45433b3 JB |
301 | if (amount > 0) |
302 | { | |
303 | if (mpos > to && mpos < to + amount) | |
3be11131 RS |
304 | { |
305 | if (adjust_markers_test) | |
306 | abort (); | |
307 | mpos = to + amount; | |
308 | } | |
b45433b3 JB |
309 | } |
310 | else | |
311 | { | |
8948d317 RS |
312 | /* Here's the case where a marker is inside text being deleted. |
313 | AMOUNT can be negative for gap motion, too, | |
314 | but then this range contains no markers. */ | |
b45433b3 | 315 | if (mpos > from + amount && mpos <= from) |
8948d317 | 316 | { |
3be11131 RS |
317 | if (adjust_markers_test) |
318 | abort (); | |
319 | mpos = from + amount; | |
8948d317 | 320 | } |
b45433b3 JB |
321 | } |
322 | if (mpos > from && mpos <= to) | |
323 | mpos += amount; | |
324 | m->bufpos = mpos; | |
325 | marker = m->chain; | |
326 | } | |
80f6e77c | 327 | #endif |
b45433b3 | 328 | } |
2b083808 | 329 | \f |
3be11131 RS |
330 | /* Adjust all markers for a deletion |
331 | whose range in bytes is FROM_BYTE to TO_BYTE. | |
332 | The range in charpos is FROM to TO. | |
333 | ||
334 | This function assumes that the gap is adjacent to | |
335 | or inside of the range being deleted. */ | |
beecb55b RS |
336 | |
337 | static void | |
3be11131 RS |
338 | adjust_markers_for_delete (from, from_byte, to, to_byte) |
339 | register int from, from_byte, to, to_byte; | |
340 | { | |
341 | Lisp_Object marker; | |
342 | register struct Lisp_Marker *m; | |
343 | register int charpos; | |
344 | /* This is what GAP_SIZE will be when this deletion is finished. */ | |
345 | int coming_gap_size = GAP_SIZE + to_byte - from_byte; | |
346 | ||
347 | marker = BUF_MARKERS (current_buffer); | |
348 | ||
349 | while (!NILP (marker)) | |
350 | { | |
351 | m = XMARKER (marker); | |
352 | charpos = m->charpos; | |
353 | ||
354 | if (charpos > Z) | |
355 | abort (); | |
356 | ||
357 | /* If the marker is after the deletion, | |
80f6e77c | 358 | relocate by number of chars / bytes deleted. */ |
3be11131 | 359 | if (charpos > to) |
80f6e77c RS |
360 | { |
361 | m->charpos -= to - from; | |
362 | m->bytepos -= to_byte - from_byte; | |
363 | } | |
3be11131 | 364 | |
80f6e77c | 365 | /* Here's the case where a marker is inside text being deleted. */ |
3be11131 RS |
366 | else if (charpos > from) |
367 | { | |
368 | record_marker_adjustment (marker, from - charpos); | |
369 | m->charpos = from; | |
80f6e77c | 370 | m->bytepos = from_byte; |
3be11131 RS |
371 | } |
372 | ||
373 | /* In a single-byte buffer, a marker's two positions must be equal. */ | |
374 | if (Z == Z_BYTE) | |
375 | { | |
80f6e77c | 376 | register int i = m->bytepos; |
3be11131 | 377 | |
80f6e77c | 378 | #if 0 |
3be11131 RS |
379 | /* We use FROM_BYTE here instead of GPT_BYTE |
380 | because FROM_BYTE is where the gap will be after the deletion. */ | |
381 | if (i > from_byte + coming_gap_size) | |
382 | i -= coming_gap_size; | |
383 | else if (i > from_byte) | |
384 | i = from_byte; | |
80f6e77c | 385 | #endif |
3be11131 RS |
386 | |
387 | if (m->charpos != i) | |
388 | abort (); | |
389 | } | |
390 | ||
391 | marker = m->chain; | |
392 | } | |
393 | } | |
2b083808 | 394 | \f |
3be11131 RS |
395 | /* Adjust markers for an insertion at CHARPOS / BYTEPOS |
396 | consisting of NCHARS chars, which are NBYTES bytes. | |
397 | ||
398 | We have to relocate the charpos of every marker that points | |
80f6e77c | 399 | after the insertion (but not their bytepos). |
3be11131 RS |
400 | |
401 | When a marker points at the insertion point, | |
402 | we advance it if either its insertion-type is t | |
403 | or BEFORE_MARKERS is true. */ | |
404 | ||
405 | static void | |
406 | adjust_markers_for_insert (from, from_byte, to, to_byte, before_markers) | |
407 | register int from, from_byte, to, to_byte, before_markers; | |
beecb55b RS |
408 | { |
409 | Lisp_Object marker; | |
469ff680 | 410 | int adjusted = 0; |
3be11131 RS |
411 | int nchars = to - from; |
412 | int nbytes = to_byte - from_byte; | |
beecb55b RS |
413 | |
414 | marker = BUF_MARKERS (current_buffer); | |
415 | ||
416 | while (!NILP (marker)) | |
417 | { | |
418 | register struct Lisp_Marker *m = XMARKER (marker); | |
80f6e77c | 419 | if (m->bytepos == from_byte |
3be11131 | 420 | && (m->insertion_type || before_markers)) |
469ff680 | 421 | { |
80f6e77c | 422 | m->bytepos += nbytes; |
3be11131 RS |
423 | m->charpos += nchars; |
424 | if (m->insertion_type) | |
425 | adjusted = 1; | |
469ff680 | 426 | } |
80f6e77c RS |
427 | else if (m->bytepos > from_byte) |
428 | { | |
429 | m->bytepos += nbytes; | |
430 | m->charpos += nchars; | |
431 | } | |
3be11131 RS |
432 | |
433 | /* In a single-byte buffer, a marker's two positions must be equal. */ | |
434 | if (Z == Z_BYTE) | |
435 | { | |
80f6e77c | 436 | register int i = m->bytepos; |
3be11131 | 437 | |
80f6e77c | 438 | #if 0 |
3be11131 RS |
439 | if (i > GPT_BYTE + GAP_SIZE) |
440 | i -= GAP_SIZE; | |
441 | else if (i > GPT_BYTE) | |
442 | i = GPT_BYTE; | |
80f6e77c | 443 | #endif |
3be11131 RS |
444 | |
445 | if (m->charpos != i) | |
446 | abort (); | |
447 | } | |
448 | ||
beecb55b RS |
449 | marker = m->chain; |
450 | } | |
3be11131 RS |
451 | |
452 | /* Adjusting only markers whose insertion-type is t may result in | |
453 | disordered overlays in the slot `overlays_before'. */ | |
469ff680 | 454 | if (adjusted) |
3be11131 | 455 | fix_overlays_before (current_buffer, from, to); |
beecb55b RS |
456 | } |
457 | ||
3be11131 RS |
458 | /* Adjust point for an insertion of NBYTES bytes, which are NCHARS characters. |
459 | ||
460 | This is used only when the value of point changes due to an insert | |
461 | or delete; it does not represent a conceptual change in point as a | |
462 | marker. In particular, point is not crossing any interval | |
463 | boundaries, so there's no need to use the usual SET_PT macro. In | |
464 | fact it would be incorrect to do so, because either the old or the | |
465 | new value of point is out of sync with the current set of | |
466 | intervals. */ | |
467 | ||
a27a38d8 | 468 | static void |
3be11131 RS |
469 | adjust_point (nchars, nbytes) |
470 | int nchars, nbytes; | |
a27a38d8 | 471 | { |
3be11131 RS |
472 | BUF_PT (current_buffer) += nchars; |
473 | BUF_PT_BYTE (current_buffer) += nbytes; | |
474 | ||
475 | /* In a single-byte buffer, the two positions must be equal. */ | |
476 | if (ZV == ZV_BYTE | |
477 | && PT != PT_BYTE) | |
478 | abort (); | |
a27a38d8 | 479 | } |
b45433b3 | 480 | \f |
3be11131 | 481 | /* Make the gap NBYTES_ADDED bytes longer. */ |
b45433b3 | 482 | |
c660b094 | 483 | void |
3be11131 RS |
484 | make_gap (nbytes_added) |
485 | int nbytes_added; | |
b45433b3 JB |
486 | { |
487 | unsigned char *result; | |
488 | Lisp_Object tem; | |
489 | int real_gap_loc; | |
3be11131 | 490 | int real_gap_loc_byte; |
b45433b3 JB |
491 | int old_gap_size; |
492 | ||
493 | /* If we have to get more space, get enough to last a while. */ | |
3be11131 | 494 | nbytes_added += 2000; |
b45433b3 | 495 | |
94056516 RS |
496 | /* Don't allow a buffer size that won't fit in an int |
497 | even if it will fit in a Lisp integer. | |
498 | That won't work because so many places use `int'. */ | |
499 | ||
3be11131 | 500 | if (Z_BYTE - BEG_BYTE + GAP_SIZE + nbytes_added |
68be917d | 501 | >= ((unsigned) 1 << (min (BITS_PER_INT, VALBITS) - 1))) |
14f6194b | 502 | error ("Buffer exceeds maximum size"); |
94056516 | 503 | |
9ac0d9e0 | 504 | BLOCK_INPUT; |
469ff680 | 505 | /* We allocate extra 1-byte `\0' at the tail for anchoring a search. */ |
3be11131 RS |
506 | result = BUFFER_REALLOC (BEG_ADDR, (Z_BYTE - BEG_BYTE |
507 | + GAP_SIZE + nbytes_added + 1)); | |
9ac0d9e0 | 508 | |
b45433b3 | 509 | if (result == 0) |
270c2138 RS |
510 | { |
511 | UNBLOCK_INPUT; | |
512 | memory_full (); | |
513 | } | |
514 | ||
515 | /* We can't unblock until the new address is properly stored. */ | |
b45433b3 | 516 | BEG_ADDR = result; |
270c2138 | 517 | UNBLOCK_INPUT; |
b45433b3 JB |
518 | |
519 | /* Prevent quitting in move_gap. */ | |
520 | tem = Vinhibit_quit; | |
521 | Vinhibit_quit = Qt; | |
522 | ||
523 | real_gap_loc = GPT; | |
3be11131 | 524 | real_gap_loc_byte = GPT_BYTE; |
b45433b3 JB |
525 | old_gap_size = GAP_SIZE; |
526 | ||
527 | /* Call the newly allocated space a gap at the end of the whole space. */ | |
528 | GPT = Z + GAP_SIZE; | |
7d92db58 | 529 | GPT_BYTE = Z_BYTE + GAP_SIZE; |
3be11131 | 530 | GAP_SIZE = nbytes_added; |
b45433b3 JB |
531 | |
532 | /* Move the new gap down to be consecutive with the end of the old one. | |
533 | This adjusts the markers properly too. */ | |
3be11131 | 534 | gap_left (real_gap_loc + old_gap_size, real_gap_loc_byte + old_gap_size, 1); |
b45433b3 JB |
535 | |
536 | /* Now combine the two into one large gap. */ | |
537 | GAP_SIZE += old_gap_size; | |
538 | GPT = real_gap_loc; | |
3be11131 | 539 | GPT_BYTE = real_gap_loc_byte; |
b45433b3 | 540 | |
469ff680 KH |
541 | /* Put an anchor. */ |
542 | *(Z_ADDR) = 0; | |
543 | ||
b45433b3 JB |
544 | Vinhibit_quit = tem; |
545 | } | |
546 | \f | |
2b083808 RS |
547 | /* Copy NBYTES bytes of text from FROM_ADDR to TO_ADDR. |
548 | FROM_MULTIBYTE says whether the incoming text is multibyte. | |
549 | TO_MULTIBYTE says whether to store the text as multibyte. | |
550 | If FROM_MULTIBYTE != TO_MULTIBYTE, we convert. | |
551 | ||
552 | Return the number of bytes stored at TO_ADDR. */ | |
553 | ||
554 | int | |
555 | copy_text (from_addr, to_addr, nbytes, | |
556 | from_multibyte, to_multibyte) | |
557 | unsigned char *from_addr; | |
558 | unsigned char *to_addr; | |
559 | int nbytes; | |
560 | int from_multibyte, to_multibyte; | |
561 | { | |
562 | if (from_multibyte == to_multibyte) | |
563 | { | |
564 | bcopy (from_addr, to_addr, nbytes); | |
565 | return nbytes; | |
566 | } | |
567 | else if (from_multibyte) | |
568 | { | |
569 | int nchars = 0; | |
570 | int bytes_left = nbytes; | |
571 | ||
572 | /* Convert multibyte to single byte. */ | |
573 | while (bytes_left > 0) | |
574 | { | |
575 | int thislen, c; | |
576 | c = STRING_CHAR_AND_LENGTH (from_addr, bytes_left, thislen); | |
cb97b980 | 577 | *to_addr++ = SINGLE_BYTE_CHAR_P (c) ? c : (c & 0177) + 0200; |
2b083808 RS |
578 | from_addr += thislen; |
579 | bytes_left--; | |
580 | nchars++; | |
581 | } | |
582 | return nchars; | |
583 | } | |
584 | else | |
585 | { | |
586 | unsigned char *initial_to_addr = to_addr; | |
587 | ||
588 | /* Convert single-byte to multibyte. */ | |
589 | while (nbytes > 0) | |
590 | { | |
591 | int c = *from_addr++; | |
592 | unsigned char workbuf[4], *str; | |
593 | int len; | |
594 | ||
595 | if (c >= 0200 && c < 0400) | |
596 | { | |
2c3af338 RS |
597 | if (! NILP (Vnonascii_translate_table)) |
598 | c = XINT (Faref (Vnonascii_translate_table, make_number (c))); | |
599 | else if (nonascii_insert_offset > 0) | |
2b083808 RS |
600 | c += nonascii_insert_offset; |
601 | else | |
602 | c += DEFAULT_NONASCII_INSERT_OFFSET; | |
603 | ||
604 | len = CHAR_STRING (c, workbuf, str); | |
605 | bcopy (str, to_addr, len); | |
606 | to_addr += len; | |
607 | nbytes--; | |
608 | } | |
609 | else | |
610 | /* Special case for speed. */ | |
611 | *to_addr++ = c, nbytes--; | |
612 | } | |
613 | return to_addr - initial_to_addr; | |
614 | } | |
615 | } | |
616 | ||
617 | /* Return the number of bytes it would take | |
618 | to convert some single-byte text to multibyte. | |
619 | The single-byte text consists of NBYTES bytes at PTR. */ | |
620 | ||
621 | int | |
622 | count_size_as_multibyte (ptr, nbytes) | |
623 | unsigned char *ptr; | |
624 | int nbytes; | |
625 | { | |
626 | int i; | |
627 | int outgoing_nbytes = 0; | |
628 | ||
629 | for (i = 0; i < nbytes; i++) | |
630 | { | |
631 | unsigned int c = *ptr++; | |
632 | if (c >= 0200 && c < 0400) | |
633 | { | |
2c3af338 RS |
634 | if (! NILP (Vnonascii_translate_table)) |
635 | c = XINT (Faref (Vnonascii_translate_table, make_number (c))); | |
636 | else if (nonascii_insert_offset > 0) | |
2b083808 RS |
637 | c += nonascii_insert_offset; |
638 | else | |
639 | c += DEFAULT_NONASCII_INSERT_OFFSET; | |
640 | } | |
641 | outgoing_nbytes += XINT (Fchar_bytes (make_number (c))); | |
642 | } | |
643 | ||
644 | return outgoing_nbytes; | |
645 | } | |
646 | \f | |
b45433b3 | 647 | /* Insert a string of specified length before point. |
2b083808 RS |
648 | This function judges multibyteness based on |
649 | enable_multibyte_characters in the current buffer; | |
650 | it never converts between single-byte and multibyte. | |
651 | ||
ef29f213 KH |
652 | DO NOT use this for the contents of a Lisp string or a Lisp buffer! |
653 | prepare_to_modify_buffer could relocate the text. */ | |
b45433b3 | 654 | |
c660b094 | 655 | void |
3be11131 | 656 | insert (string, nbytes) |
b45433b3 | 657 | register unsigned char *string; |
3be11131 | 658 | register nbytes; |
b45433b3 | 659 | { |
3be11131 | 660 | if (nbytes > 0) |
395ec62e | 661 | { |
3be11131 RS |
662 | int opoint = PT; |
663 | insert_1 (string, nbytes, 0, 1, 0); | |
664 | signal_after_change (opoint, 0, PT - opoint); | |
cd11ef31 RS |
665 | } |
666 | } | |
667 | ||
2b083808 RS |
668 | /* Likewise, but inherit text properties from neighboring characters. */ |
669 | ||
c660b094 | 670 | void |
3be11131 | 671 | insert_and_inherit (string, nbytes) |
cd11ef31 | 672 | register unsigned char *string; |
3be11131 | 673 | register nbytes; |
cd11ef31 | 674 | { |
3be11131 | 675 | if (nbytes > 0) |
cd11ef31 | 676 | { |
3be11131 RS |
677 | int opoint = PT; |
678 | insert_1 (string, nbytes, 1, 1, 0); | |
679 | signal_after_change (opoint, 0, PT - opoint); | |
395ec62e KH |
680 | } |
681 | } | |
b45433b3 | 682 | |
2b083808 | 683 | /* Insert the character C before point. Do not inherit text properties. */ |
3be11131 | 684 | |
c660b094 | 685 | void |
3be11131 RS |
686 | insert_char (c) |
687 | int c; | |
688 | { | |
689 | unsigned char workbuf[4], *str; | |
2b083808 RS |
690 | int len; |
691 | ||
692 | if (! NILP (current_buffer->enable_multibyte_characters)) | |
693 | len = CHAR_STRING (c, workbuf, str); | |
694 | else | |
695 | { | |
696 | len = 1; | |
697 | workbuf[0] = c; | |
698 | str = workbuf; | |
699 | } | |
3be11131 RS |
700 | |
701 | insert (str, len); | |
702 | } | |
703 | ||
2b083808 | 704 | /* Insert the null-terminated string S before point. */ |
3be11131 RS |
705 | |
706 | void | |
707 | insert_string (s) | |
708 | char *s; | |
709 | { | |
710 | insert (s, strlen (s)); | |
711 | } | |
712 | ||
713 | /* Like `insert' except that all markers pointing at the place where | |
714 | the insertion happens are adjusted to point after it. | |
715 | Don't use this function to insert part of a Lisp string, | |
716 | since gc could happen and relocate it. */ | |
717 | ||
718 | void | |
719 | insert_before_markers (string, nbytes) | |
720 | unsigned char *string; | |
721 | register int nbytes; | |
722 | { | |
723 | if (nbytes > 0) | |
724 | { | |
725 | int opoint = PT; | |
726 | ||
727 | insert_1 (string, nbytes, 0, 1, 1); | |
728 | signal_after_change (opoint, 0, PT - opoint); | |
729 | } | |
730 | } | |
731 | ||
2b083808 RS |
732 | /* Likewise, but inherit text properties from neighboring characters. */ |
733 | ||
3be11131 RS |
734 | void |
735 | insert_before_markers_and_inherit (string, nbytes) | |
736 | unsigned char *string; | |
737 | register int nbytes; | |
738 | { | |
739 | if (nbytes > 0) | |
740 | { | |
741 | int opoint = PT; | |
742 | ||
743 | insert_1 (string, nbytes, 1, 1, 1); | |
744 | signal_after_change (opoint, 0, PT - opoint); | |
745 | } | |
746 | } | |
2b083808 | 747 | \f |
3be11131 RS |
748 | /* Subroutine used by the insert functions above. */ |
749 | ||
750 | void | |
751 | insert_1 (string, nbytes, inherit, prepare, before_markers) | |
395ec62e | 752 | register unsigned char *string; |
3be11131 RS |
753 | register int nbytes; |
754 | int inherit, prepare, before_markers; | |
395ec62e KH |
755 | { |
756 | register Lisp_Object temp; | |
3be11131 | 757 | int nchars = chars_in_text (string, nbytes); |
b45433b3 | 758 | |
c660b094 | 759 | if (prepare) |
d206af14 | 760 | prepare_to_modify_buffer (PT, PT, NULL); |
b45433b3 | 761 | |
2bcaed71 | 762 | if (PT != GPT) |
3be11131 RS |
763 | move_gap_both (PT, PT_BYTE); |
764 | if (GAP_SIZE < nbytes) | |
765 | make_gap (nbytes - GAP_SIZE); | |
b45433b3 | 766 | |
3be11131 | 767 | record_insert (PT, nchars); |
b45433b3 JB |
768 | MODIFF++; |
769 | ||
3be11131 | 770 | bcopy (string, GPT_ADDR, nbytes); |
b45433b3 | 771 | |
648c4c55 | 772 | #ifdef USE_TEXT_PROPERTIES |
9fbf87cd | 773 | if (BUF_INTERVALS (current_buffer) != 0) |
648c4c55 | 774 | /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES. */ |
3be11131 | 775 | offset_intervals (current_buffer, PT, nchars); |
648c4c55 | 776 | #endif |
679194a6 | 777 | |
3be11131 RS |
778 | GAP_SIZE -= nbytes; |
779 | GPT += nchars; | |
780 | ZV += nchars; | |
781 | Z += nchars; | |
782 | GPT_BYTE += nbytes; | |
783 | ZV_BYTE += nbytes; | |
784 | Z_BYTE += nbytes; | |
469ff680 | 785 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
3be11131 RS |
786 | adjust_overlays_for_insert (PT, nchars); |
787 | adjust_markers_for_insert (PT, PT_BYTE, PT + nchars, PT_BYTE + nbytes, | |
788 | before_markers); | |
789 | adjust_point (nchars, nbytes); | |
790 | ||
791 | if (GPT_BYTE < GPT) | |
792 | abort (); | |
cd11ef31 | 793 | |
648c4c55 | 794 | #ifdef USE_TEXT_PROPERTIES |
9fbf87cd | 795 | if (!inherit && BUF_INTERVALS (current_buffer) != 0) |
3be11131 | 796 | Fset_text_properties (make_number (PT - nchars), make_number (PT), |
cd11ef31 | 797 | Qnil, Qnil); |
648c4c55 | 798 | #endif |
b45433b3 | 799 | } |
2b083808 RS |
800 | |
801 | /* Insert a sequence of NCHARS chars which occupy NBYTES bytes | |
802 | starting at STRING. INHERIT, PREPARE and BEFORE_MARKERS | |
803 | are the same as in insert_1. */ | |
804 | ||
805 | void | |
806 | insert_1_both (string, nchars, nbytes, inherit, prepare, before_markers) | |
807 | register unsigned char *string; | |
808 | register int nchars, nbytes; | |
809 | int inherit, prepare, before_markers; | |
810 | { | |
811 | register Lisp_Object temp; | |
812 | ||
813 | if (prepare) | |
814 | prepare_to_modify_buffer (PT, PT, NULL); | |
815 | ||
816 | if (PT != GPT) | |
817 | move_gap_both (PT, PT_BYTE); | |
818 | if (GAP_SIZE < nbytes) | |
819 | make_gap (nbytes - GAP_SIZE); | |
820 | ||
821 | record_insert (PT, nchars); | |
822 | MODIFF++; | |
823 | ||
824 | bcopy (string, GPT_ADDR, nbytes); | |
825 | ||
826 | #ifdef USE_TEXT_PROPERTIES | |
827 | if (BUF_INTERVALS (current_buffer) != 0) | |
828 | /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES. */ | |
829 | offset_intervals (current_buffer, PT, nchars); | |
830 | #endif | |
831 | ||
832 | GAP_SIZE -= nbytes; | |
833 | GPT += nchars; | |
834 | ZV += nchars; | |
835 | Z += nchars; | |
836 | GPT_BYTE += nbytes; | |
837 | ZV_BYTE += nbytes; | |
838 | Z_BYTE += nbytes; | |
839 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ | |
840 | adjust_overlays_for_insert (PT, nchars); | |
841 | adjust_markers_for_insert (PT, PT_BYTE, PT + nchars, PT_BYTE + nbytes, | |
842 | before_markers); | |
843 | adjust_point (nchars, nbytes); | |
844 | ||
845 | if (GPT_BYTE < GPT) | |
846 | abort (); | |
847 | ||
848 | #ifdef USE_TEXT_PROPERTIES | |
849 | if (!inherit && BUF_INTERVALS (current_buffer) != 0) | |
850 | Fset_text_properties (make_number (PT - nchars), make_number (PT), | |
851 | Qnil, Qnil); | |
852 | #endif | |
853 | } | |
3be11131 | 854 | \f |
679194a6 | 855 | /* Insert the part of the text of STRING, a Lisp object assumed to be |
2b083808 RS |
856 | of type string, consisting of the LENGTH characters (LENGTH_BYTE bytes) |
857 | starting at position POS / POS_BYTE. If the text of STRING has properties, | |
858 | copy them into the buffer. | |
679194a6 JA |
859 | |
860 | It does not work to use `insert' for this, because a GC could happen | |
7e1ea612 JB |
861 | before we bcopy the stuff into the buffer, and relocate the string |
862 | without insert noticing. */ | |
679194a6 | 863 | |
c660b094 | 864 | void |
2b083808 | 865 | insert_from_string (string, pos, pos_byte, length, length_byte, inherit) |
b45433b3 | 866 | Lisp_Object string; |
2b083808 | 867 | register int pos, pos_byte, length, length_byte; |
9391e591 | 868 | int inherit; |
395ec62e KH |
869 | { |
870 | if (length > 0) | |
871 | { | |
3be11131 | 872 | int opoint = PT; |
2b083808 RS |
873 | insert_from_string_1 (string, pos, pos_byte, length, length_byte, |
874 | inherit, 0); | |
3be11131 | 875 | signal_after_change (opoint, 0, PT - opoint); |
395ec62e KH |
876 | } |
877 | } | |
878 | ||
2b083808 RS |
879 | /* Like `insert_from_string' except that all markers pointing |
880 | at the place where the insertion happens are adjusted to point after it. */ | |
3be11131 RS |
881 | |
882 | void | |
2b083808 RS |
883 | insert_from_string_before_markers (string, pos, pos_byte, |
884 | length, length_byte, inherit) | |
395ec62e | 885 | Lisp_Object string; |
2b083808 | 886 | register int pos, pos_byte, length, length_byte; |
395ec62e | 887 | int inherit; |
3be11131 RS |
888 | { |
889 | if (length > 0) | |
890 | { | |
891 | int opoint = PT; | |
2b083808 RS |
892 | insert_from_string_1 (string, pos, pos_byte, length, length_byte, |
893 | inherit, 1); | |
3be11131 RS |
894 | signal_after_change (opoint, 0, PT - opoint); |
895 | } | |
896 | } | |
897 | ||
898 | /* Subroutine of the insertion functions above. */ | |
899 | ||
900 | static void | |
2b083808 RS |
901 | insert_from_string_1 (string, pos, pos_byte, nchars, nbytes, |
902 | inherit, before_markers) | |
3be11131 | 903 | Lisp_Object string; |
2b083808 | 904 | register int pos, pos_byte, nchars, nbytes; |
3be11131 | 905 | int inherit, before_markers; |
b45433b3 JB |
906 | { |
907 | register Lisp_Object temp; | |
908 | struct gcpro gcpro1; | |
2b083808 RS |
909 | int outgoing_nbytes = nbytes; |
910 | ||
911 | /* Make OUTGOING_NBYTES describe the text | |
912 | as it will be inserted in this buffer. */ | |
913 | ||
914 | if (NILP (current_buffer->enable_multibyte_characters)) | |
915 | outgoing_nbytes = nchars; | |
916 | else if (nchars == nbytes) | |
917 | outgoing_nbytes | |
918 | = count_size_as_multibyte (&XSTRING (string)->data[pos_byte], | |
919 | nbytes); | |
b45433b3 | 920 | |
b45433b3 | 921 | /* Make sure point-max won't overflow after this insertion. */ |
2b083808 RS |
922 | XSETINT (temp, outgoing_nbytes + Z); |
923 | if (outgoing_nbytes + Z != XINT (temp)) | |
3be11131 | 924 | error ("Maximum buffer size exceeded"); |
b45433b3 JB |
925 | |
926 | GCPRO1 (string); | |
d206af14 | 927 | prepare_to_modify_buffer (PT, PT, NULL); |
b45433b3 | 928 | |
2bcaed71 | 929 | if (PT != GPT) |
3be11131 RS |
930 | move_gap_both (PT, PT_BYTE); |
931 | if (GAP_SIZE < nbytes) | |
2b083808 | 932 | make_gap (outgoing_nbytes - GAP_SIZE); |
b45433b3 | 933 | |
3be11131 | 934 | record_insert (PT, nchars); |
b45433b3 JB |
935 | MODIFF++; |
936 | UNGCPRO; | |
937 | ||
2b083808 RS |
938 | /* Copy the string text into the buffer, perhaps converting |
939 | between single-byte and multibyte. */ | |
940 | copy_text (XSTRING (string)->data + pos_byte, GPT_ADDR, nbytes, | |
941 | /* If these are equal, it is a single-byte string. | |
942 | Its chars are either ASCII, in which case copy_text | |
943 | won't change it, or single-byte non-ASCII chars, | |
944 | that need to be changed. */ | |
945 | nchars != nbytes, | |
946 | ! NILP (current_buffer->enable_multibyte_characters)); | |
b45433b3 | 947 | |
679194a6 | 948 | /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */ |
3be11131 RS |
949 | offset_intervals (current_buffer, PT, nchars); |
950 | ||
7792090e | 951 | GAP_SIZE -= outgoing_nbytes; |
3be11131 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 | adjust_overlays_for_insert (PT, nchars); |
2b083808 RS |
960 | adjust_markers_for_insert (PT, PT_BYTE, PT + nchars, |
961 | PT_BYTE + outgoing_nbytes, | |
3be11131 RS |
962 | before_markers); |
963 | ||
964 | if (GPT_BYTE < GPT) | |
965 | abort (); | |
679194a6 | 966 | |
3be11131 | 967 | graft_intervals_into_buffer (XSTRING (string)->intervals, PT, nchars, |
9391e591 | 968 | current_buffer, inherit); |
679194a6 | 969 | |
2b083808 | 970 | adjust_point (nchars, outgoing_nbytes); |
b45433b3 | 971 | } |
3be11131 RS |
972 | \f |
973 | /* Insert text from BUF, NCHARS characters starting at CHARPOS, into the | |
ef29f213 KH |
974 | current buffer. If the text in BUF has properties, they are absorbed |
975 | into the current buffer. | |
976 | ||
977 | It does not work to use `insert' for this, because a malloc could happen | |
978 | and relocate BUF's text before the bcopy happens. */ | |
979 | ||
980 | void | |
3be11131 | 981 | insert_from_buffer (buf, charpos, nchars, inherit) |
ef29f213 | 982 | struct buffer *buf; |
3be11131 | 983 | int charpos, nchars; |
ef29f213 KH |
984 | int inherit; |
985 | { | |
3be11131 | 986 | if (nchars > 0) |
ef29f213 | 987 | { |
3be11131 RS |
988 | int opoint = PT; |
989 | ||
990 | insert_from_buffer_1 (buf, charpos, nchars, inherit); | |
991 | signal_after_change (opoint, 0, PT - opoint); | |
ef29f213 KH |
992 | } |
993 | } | |
994 | ||
995 | static void | |
3be11131 | 996 | insert_from_buffer_1 (buf, from, nchars, inherit) |
ef29f213 | 997 | struct buffer *buf; |
3be11131 | 998 | int from, nchars; |
ef29f213 KH |
999 | int inherit; |
1000 | { | |
1001 | register Lisp_Object temp; | |
1002 | int chunk; | |
3be11131 RS |
1003 | int from_byte = buf_charpos_to_bytepos (buf, from); |
1004 | int to_byte = buf_charpos_to_bytepos (buf, from + nchars); | |
2b083808 RS |
1005 | int incoming_nbytes = to_byte - from_byte; |
1006 | int outgoing_nbytes = incoming_nbytes; | |
1007 | ||
1008 | /* Make OUTGOING_NBYTES describe the text | |
1009 | as it will be inserted in this buffer. */ | |
1010 | ||
1011 | if (NILP (current_buffer->enable_multibyte_characters)) | |
1012 | outgoing_nbytes = nchars; | |
1013 | else if (NILP (buf->enable_multibyte_characters)) | |
1014 | outgoing_nbytes | |
1015 | = count_size_as_multibyte (BUF_BYTE_ADDRESS (buf, from_byte), | |
1016 | incoming_nbytes); | |
ef29f213 KH |
1017 | |
1018 | /* Make sure point-max won't overflow after this insertion. */ | |
2b083808 RS |
1019 | XSETINT (temp, outgoing_nbytes + Z); |
1020 | if (outgoing_nbytes + Z != XINT (temp)) | |
3be11131 | 1021 | error ("Maximum buffer size exceeded"); |
ef29f213 | 1022 | |
d206af14 | 1023 | prepare_to_modify_buffer (PT, PT, NULL); |
ef29f213 KH |
1024 | |
1025 | if (PT != GPT) | |
3be11131 | 1026 | move_gap_both (PT, PT_BYTE); |
2b083808 RS |
1027 | if (GAP_SIZE < outgoing_nbytes) |
1028 | make_gap (outgoing_nbytes - GAP_SIZE); | |
ef29f213 | 1029 | |
3be11131 | 1030 | record_insert (PT, nchars); |
ef29f213 KH |
1031 | MODIFF++; |
1032 | ||
3be11131 | 1033 | if (from < BUF_GPT (buf)) |
ef29f213 | 1034 | { |
3be11131 | 1035 | chunk = BUF_GPT_BYTE (buf) - from_byte; |
2b083808 RS |
1036 | if (chunk > incoming_nbytes) |
1037 | chunk = incoming_nbytes; | |
1038 | copy_text (BUF_BYTE_ADDRESS (buf, from_byte), | |
1039 | GPT_ADDR, chunk, | |
1040 | ! NILP (buf->enable_multibyte_characters), | |
1041 | ! NILP (current_buffer->enable_multibyte_characters)); | |
ef29f213 KH |
1042 | } |
1043 | else | |
1044 | chunk = 0; | |
2b083808 RS |
1045 | if (chunk < incoming_nbytes) |
1046 | copy_text (BUF_BYTE_ADDRESS (buf, from_byte + chunk), | |
1047 | GPT_ADDR + chunk, incoming_nbytes - chunk, | |
1048 | ! NILP (buf->enable_multibyte_characters), | |
1049 | ! NILP (current_buffer->enable_multibyte_characters)); | |
ef29f213 KH |
1050 | |
1051 | #ifdef USE_TEXT_PROPERTIES | |
9fbf87cd | 1052 | if (BUF_INTERVALS (current_buffer) != 0) |
3be11131 | 1053 | offset_intervals (current_buffer, PT, nchars); |
ef29f213 KH |
1054 | #endif |
1055 | ||
2b083808 | 1056 | GAP_SIZE -= outgoing_nbytes; |
3be11131 RS |
1057 | GPT += nchars; |
1058 | ZV += nchars; | |
1059 | Z += nchars; | |
2b083808 RS |
1060 | GPT_BYTE += outgoing_nbytes; |
1061 | ZV_BYTE += outgoing_nbytes; | |
1062 | Z_BYTE += outgoing_nbytes; | |
469ff680 | 1063 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
3be11131 | 1064 | adjust_overlays_for_insert (PT, nchars); |
2b083808 RS |
1065 | adjust_markers_for_insert (PT, PT_BYTE, PT + nchars, |
1066 | PT_BYTE + outgoing_nbytes, 0); | |
1067 | adjust_point (nchars, outgoing_nbytes); | |
3be11131 RS |
1068 | |
1069 | if (GPT_BYTE < GPT) | |
1070 | abort (); | |
ef29f213 KH |
1071 | |
1072 | /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */ | |
9fbf87cd | 1073 | graft_intervals_into_buffer (copy_intervals (BUF_INTERVALS (buf), |
3be11131 RS |
1074 | from, nchars), |
1075 | PT - nchars, nchars, | |
1076 | current_buffer, inherit); | |
b45433b3 JB |
1077 | } |
1078 | \f | |
2d9eea44 KH |
1079 | /* This function should be called after moving gap to FROM and before |
1080 | altering LEN chars of text starting from FROM. This adjusts | |
1081 | various position keepers and markers and as if the text is deleted. | |
1082 | Don't forget to call adjust_after_replace after you actually alter | |
1083 | the text. */ | |
1084 | ||
1e9c7b7d KH |
1085 | void |
1086 | adjust_before_replace (from, from_byte, to, to_byte) | |
1087 | int from, from_byte, to, to_byte; | |
1088 | { | |
1089 | adjust_markers_for_delete (from, from_byte, to, to_byte); | |
1090 | record_delete (from, to - from); | |
1091 | } | |
1092 | ||
2d9eea44 KH |
1093 | /* This function should be called after altering the text between FROM |
1094 | and TO to a new text of LEN chars (LEN_BYTE bytes). */ | |
1095 | ||
1e9c7b7d KH |
1096 | void |
1097 | adjust_after_replace (from, from_byte, to, to_byte, len, len_byte) | |
1098 | int from, from_byte, to, to_byte, len, len_byte; | |
1099 | { | |
1100 | record_insert (from, len); | |
1101 | if (from < PT) | |
2d9eea44 | 1102 | adjust_point (len - (to - from), len_byte - (to_byte - from_byte)); |
1e9c7b7d KH |
1103 | #ifdef USE_TEXT_PROPERTIES |
1104 | offset_intervals (current_buffer, PT, len - (to - from)); | |
1105 | #endif | |
1106 | adjust_overlays_for_delete (from, to - from); | |
1107 | adjust_overlays_for_insert (from, len); | |
1108 | adjust_markers_for_insert (from, from_byte, | |
1109 | from + len, from_byte + len_byte, 0); | |
1110 | if (len == 0) | |
1111 | evaporate_overlays (from); | |
1112 | MODIFF++; | |
1e9c7b7d KH |
1113 | } |
1114 | ||
3be11131 | 1115 | /* Replace the text from character positions FROM to TO with NEW, |
c5ca4d3a RS |
1116 | If PREPARE is nonzero, call prepare_to_modify_buffer. |
1117 | If INHERIT, the newly inserted text should inherit text properties | |
1118 | from the surrounding non-deleted text. */ | |
1119 | ||
1120 | /* Note that this does not yet handle markers quite right. | |
1121 | Also it needs to record a single undo-entry that does a replacement | |
1122 | rather than a separate delete and insert. | |
1123 | That way, undo will also handle markers properly. */ | |
1124 | ||
1125 | void | |
1126 | replace_range (from, to, new, prepare, inherit) | |
1127 | Lisp_Object new; | |
1128 | int from, to, prepare, inherit; | |
1129 | { | |
2b083808 RS |
1130 | int inschars = XSTRING (new)->size; |
1131 | int insbytes = XSTRING (new)->size_byte; | |
3be11131 RS |
1132 | int from_byte, to_byte; |
1133 | int nbytes_del, nchars_del; | |
c5ca4d3a RS |
1134 | register Lisp_Object temp; |
1135 | struct gcpro gcpro1; | |
1136 | ||
1137 | GCPRO1 (new); | |
1138 | ||
1139 | if (prepare) | |
1140 | { | |
1141 | int range_length = to - from; | |
1142 | prepare_to_modify_buffer (from, to, &from); | |
1143 | to = from + range_length; | |
1144 | } | |
1145 | ||
3be11131 RS |
1146 | UNGCPRO; |
1147 | ||
c5ca4d3a RS |
1148 | /* Make args be valid */ |
1149 | if (from < BEGV) | |
1150 | from = BEGV; | |
1151 | if (to > ZV) | |
1152 | to = ZV; | |
1153 | ||
3be11131 RS |
1154 | from_byte = CHAR_TO_BYTE (from); |
1155 | to_byte = CHAR_TO_BYTE (to); | |
c5ca4d3a | 1156 | |
3be11131 RS |
1157 | nchars_del = to - from; |
1158 | nbytes_del = to_byte - from_byte; | |
1159 | ||
1160 | if (nbytes_del <= 0 && insbytes == 0) | |
1161 | return; | |
c5ca4d3a RS |
1162 | |
1163 | /* Make sure point-max won't overflow after this insertion. */ | |
3be11131 RS |
1164 | XSETINT (temp, Z_BYTE - nbytes_del + insbytes); |
1165 | if (Z_BYTE - nbytes_del + insbytes != XINT (temp)) | |
1166 | error ("Maximum buffer size exceeded"); | |
c5ca4d3a | 1167 | |
c5ca4d3a RS |
1168 | GCPRO1 (new); |
1169 | ||
1170 | /* Make sure the gap is somewhere in or next to what we are deleting. */ | |
1171 | if (from > GPT) | |
3be11131 | 1172 | gap_right (from, from_byte); |
c5ca4d3a | 1173 | if (to < GPT) |
3be11131 | 1174 | gap_left (to, to_byte, 0); |
c5ca4d3a RS |
1175 | |
1176 | /* Relocate all markers pointing into the new, larger gap | |
1177 | to point at the end of the text before the gap. | |
3be11131 RS |
1178 | Do this before recording the deletion, |
1179 | so that undo handles this after reinserting the text. */ | |
1180 | adjust_markers_for_delete (from, from_byte, to, to_byte); | |
c5ca4d3a | 1181 | |
3be11131 | 1182 | record_delete (from, nchars_del); |
c5ca4d3a | 1183 | |
3be11131 RS |
1184 | GAP_SIZE += nbytes_del; |
1185 | ZV -= nchars_del; | |
1186 | Z -= nchars_del; | |
1187 | ZV_BYTE -= nbytes_del; | |
1188 | Z_BYTE -= nbytes_del; | |
c5ca4d3a | 1189 | GPT = from; |
3be11131 | 1190 | GPT_BYTE = from_byte; |
c5ca4d3a RS |
1191 | *(GPT_ADDR) = 0; /* Put an anchor. */ |
1192 | ||
3be11131 RS |
1193 | if (GPT_BYTE < GPT) |
1194 | abort (); | |
1195 | ||
c5ca4d3a RS |
1196 | if (GPT - BEG < beg_unchanged) |
1197 | beg_unchanged = GPT - BEG; | |
1198 | if (Z - GPT < end_unchanged) | |
1199 | end_unchanged = Z - GPT; | |
1200 | ||
3be11131 RS |
1201 | if (GAP_SIZE < insbytes) |
1202 | make_gap (insbytes - GAP_SIZE); | |
c5ca4d3a | 1203 | |
3be11131 | 1204 | record_insert (from, inschars); |
c5ca4d3a | 1205 | |
3be11131 | 1206 | bcopy (XSTRING (new)->data, GPT_ADDR, insbytes); |
c5ca4d3a RS |
1207 | |
1208 | /* Relocate point as if it were a marker. */ | |
1209 | if (from < PT) | |
3be11131 RS |
1210 | adjust_point (from + inschars - (PT < to ? PT : to), |
1211 | (from_byte + insbytes | |
1212 | - (PT_BYTE < to_byte ? PT_BYTE : to_byte))); | |
c5ca4d3a RS |
1213 | |
1214 | #ifdef USE_TEXT_PROPERTIES | |
3be11131 | 1215 | offset_intervals (current_buffer, PT, inschars - nchars_del); |
c5ca4d3a RS |
1216 | #endif |
1217 | ||
3be11131 RS |
1218 | GAP_SIZE -= insbytes; |
1219 | GPT += inschars; | |
1220 | ZV += inschars; | |
1221 | Z += inschars; | |
1222 | GPT_BYTE += insbytes; | |
1223 | ZV_BYTE += insbytes; | |
1224 | ZV_BYTE += insbytes; | |
c5ca4d3a RS |
1225 | if (GAP_SIZE > 0) *(GPT_ADDR) = 0; /* Put an anchor. */ |
1226 | ||
3be11131 RS |
1227 | if (GPT_BYTE < GPT) |
1228 | abort (); | |
1229 | ||
c5ca4d3a RS |
1230 | /* Adjust the overlay center as needed. This must be done after |
1231 | adjusting the markers that bound the overlays. */ | |
3be11131 RS |
1232 | adjust_overlays_for_delete (from, nchars_del); |
1233 | adjust_overlays_for_insert (from, inschars); | |
1234 | adjust_markers_for_insert (from, from_byte, from + inschars, | |
1235 | from_byte + insbytes, 0); | |
c5ca4d3a RS |
1236 | |
1237 | #ifdef USE_TEXT_PROPERTIES | |
1238 | /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */ | |
3be11131 RS |
1239 | graft_intervals_into_buffer (XSTRING (new)->intervals, from, |
1240 | inschars, current_buffer, inherit); | |
c5ca4d3a RS |
1241 | #endif |
1242 | ||
3be11131 | 1243 | if (insbytes == 0) |
c5ca4d3a RS |
1244 | evaporate_overlays (from); |
1245 | ||
1246 | MODIFF++; | |
1247 | UNGCPRO; | |
1248 | ||
3be11131 | 1249 | signal_after_change (from, nchars_del, inschars); |
c5ca4d3a RS |
1250 | } |
1251 | \f | |
b45433b3 | 1252 | /* Delete characters in current buffer |
3be11131 RS |
1253 | from FROM up to (but not including) TO. |
1254 | If TO comes before FROM, we delete nothing. */ | |
b45433b3 | 1255 | |
c660b094 | 1256 | void |
b45433b3 JB |
1257 | del_range (from, to) |
1258 | register int from, to; | |
47c64747 | 1259 | { |
c660b094 | 1260 | del_range_1 (from, to, 1); |
47c64747 RS |
1261 | } |
1262 | ||
1263 | /* Like del_range; PREPARE says whether to call prepare_to_modify_buffer. */ | |
1264 | ||
c660b094 | 1265 | void |
47c64747 | 1266 | del_range_1 (from, to, prepare) |
d206af14 | 1267 | int from, to, prepare; |
b45433b3 | 1268 | { |
3be11131 RS |
1269 | int from_byte, to_byte; |
1270 | ||
1271 | /* Make args be valid */ | |
1272 | if (from < BEGV) | |
1273 | from = BEGV; | |
1274 | if (to > ZV) | |
1275 | to = ZV; | |
1276 | ||
1277 | if (to <= from) | |
1278 | return; | |
1279 | ||
1280 | if (prepare) | |
1281 | { | |
1282 | int range_length = to - from; | |
1283 | prepare_to_modify_buffer (from, to, &from); | |
1284 | to = from + range_length; | |
1285 | } | |
1286 | ||
1287 | from_byte = CHAR_TO_BYTE (from); | |
1288 | to_byte = CHAR_TO_BYTE (to); | |
1289 | ||
a66afea0 | 1290 | del_range_2 (from, from_byte, to, to_byte); |
3be11131 RS |
1291 | } |
1292 | ||
1293 | /* Like del_range_1 but args are byte positions, not char positions. */ | |
1294 | ||
1295 | void | |
1296 | del_range_byte (from_byte, to_byte, prepare) | |
1297 | int from_byte, to_byte, prepare; | |
1298 | { | |
1299 | int from, to; | |
1300 | ||
1301 | /* Make args be valid */ | |
1302 | if (from_byte < BEGV_BYTE) | |
1303 | from_byte = BEGV_BYTE; | |
1304 | if (to_byte > ZV_BYTE) | |
1305 | to_byte = ZV_BYTE; | |
1306 | ||
1307 | if (to_byte <= from_byte) | |
1308 | return; | |
1309 | ||
1310 | from = BYTE_TO_CHAR (from_byte); | |
1311 | to = BYTE_TO_CHAR (to_byte); | |
b45433b3 | 1312 | |
d206af14 RS |
1313 | if (prepare) |
1314 | { | |
3be11131 | 1315 | int old_from = from, old_to = Z - to; |
d206af14 RS |
1316 | int range_length = to - from; |
1317 | prepare_to_modify_buffer (from, to, &from); | |
1318 | to = from + range_length; | |
3be11131 RS |
1319 | |
1320 | if (old_from != from) | |
1321 | from_byte = CHAR_TO_BYTE (from); | |
1322 | if (old_to == Z - to) | |
1323 | to_byte = CHAR_TO_BYTE (to); | |
d206af14 RS |
1324 | } |
1325 | ||
a66afea0 | 1326 | del_range_2 (from, from_byte, to, to_byte); |
3be11131 RS |
1327 | } |
1328 | ||
1329 | /* Like del_range_1, but positions are specified both as charpos | |
1330 | and bytepos. */ | |
1331 | ||
1332 | void | |
353800c7 KH |
1333 | del_range_both (from, from_byte, to, to_byte, prepare) |
1334 | int from, from_byte, to, to_byte, prepare; | |
3be11131 | 1335 | { |
b45433b3 | 1336 | /* Make args be valid */ |
3be11131 RS |
1337 | if (from_byte < BEGV_BYTE) |
1338 | from_byte = BEGV_BYTE; | |
1339 | if (to_byte > ZV_BYTE) | |
1340 | to_byte = ZV_BYTE; | |
1341 | ||
1342 | if (to_byte <= from_byte) | |
1343 | return; | |
1344 | ||
b45433b3 JB |
1345 | if (from < BEGV) |
1346 | from = BEGV; | |
1347 | if (to > ZV) | |
1348 | to = ZV; | |
1349 | ||
3be11131 RS |
1350 | if (prepare) |
1351 | { | |
1352 | int old_from = from, old_to = Z - to; | |
1353 | int range_length = to - from; | |
1354 | prepare_to_modify_buffer (from, to, &from); | |
1355 | to = from + range_length; | |
1356 | ||
1357 | if (old_from != from) | |
1358 | from_byte = CHAR_TO_BYTE (from); | |
1359 | if (old_to == Z - to) | |
1360 | to_byte = CHAR_TO_BYTE (to); | |
1361 | } | |
1362 | ||
a66afea0 | 1363 | del_range_2 (from, from_byte, to, to_byte); |
3be11131 RS |
1364 | } |
1365 | ||
1366 | /* Delete a range of text, specified both as character positions | |
1367 | and byte positions. FROM and TO are character positions, | |
1368 | while FROM_BYTE and TO_BYTE are byte positions. */ | |
1369 | ||
1370 | void | |
a66afea0 KH |
1371 | del_range_2 (from, from_byte, to, to_byte) |
1372 | int from, from_byte, to, to_byte; | |
3be11131 RS |
1373 | { |
1374 | register int nbytes_del, nchars_del; | |
1375 | ||
1376 | nchars_del = to - from; | |
1377 | nbytes_del = to_byte - from_byte; | |
b45433b3 JB |
1378 | |
1379 | /* Make sure the gap is somewhere in or next to what we are deleting. */ | |
1380 | if (from > GPT) | |
3be11131 | 1381 | gap_right (from, from_byte); |
b45433b3 | 1382 | if (to < GPT) |
3be11131 | 1383 | gap_left (to, to_byte, 0); |
b45433b3 | 1384 | |
8948d317 RS |
1385 | /* Relocate all markers pointing into the new, larger gap |
1386 | to point at the end of the text before the gap. | |
3be11131 RS |
1387 | Do this before recording the deletion, |
1388 | so that undo handles this after reinserting the text. */ | |
1389 | adjust_markers_for_delete (from, from_byte, to, to_byte); | |
8948d317 | 1390 | |
3be11131 | 1391 | record_delete (from, nchars_del); |
be09561e RS |
1392 | MODIFF++; |
1393 | ||
b45433b3 | 1394 | /* Relocate point as if it were a marker. */ |
2bcaed71 | 1395 | if (from < PT) |
3be11131 RS |
1396 | adjust_point (from - (PT < to ? PT : to), |
1397 | from_byte - (PT_BYTE < to_byte ? PT_BYTE : to_byte)); | |
b45433b3 | 1398 | |
16032db6 | 1399 | /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */ |
3be11131 | 1400 | offset_intervals (current_buffer, from, - nchars_del); |
16032db6 | 1401 | |
adde4858 | 1402 | /* Adjust the overlay center as needed. This must be done after |
a7f38d28 | 1403 | adjusting the markers that bound the overlays. */ |
3be11131 | 1404 | adjust_overlays_for_delete (from_byte, nchars_del); |
adde4858 | 1405 | |
3be11131 RS |
1406 | GAP_SIZE += nbytes_del; |
1407 | ZV_BYTE -= nbytes_del; | |
1408 | Z_BYTE -= nbytes_del; | |
1409 | ZV -= nchars_del; | |
1410 | Z -= nchars_del; | |
b45433b3 | 1411 | GPT = from; |
3be11131 | 1412 | GPT_BYTE = from_byte; |
469ff680 | 1413 | *(GPT_ADDR) = 0; /* Put an anchor. */ |
b45433b3 | 1414 | |
3be11131 RS |
1415 | if (GPT_BYTE < GPT) |
1416 | abort (); | |
1417 | ||
b45433b3 JB |
1418 | if (GPT - BEG < beg_unchanged) |
1419 | beg_unchanged = GPT - BEG; | |
1420 | if (Z - GPT < end_unchanged) | |
1421 | end_unchanged = Z - GPT; | |
1422 | ||
d386034e | 1423 | evaporate_overlays (from); |
3be11131 | 1424 | signal_after_change (from, nchars_del, 0); |
b45433b3 JB |
1425 | } |
1426 | \f | |
3be11131 RS |
1427 | /* Call this if you're about to change the region of BUFFER from |
1428 | character positions START to END. This checks the read-only | |
1429 | properties of the region, calls the necessary modification hooks, | |
1430 | and warns the next redisplay that it should pay attention to that | |
1431 | area. */ | |
1432 | ||
c660b094 | 1433 | void |
04a759c8 JB |
1434 | modify_region (buffer, start, end) |
1435 | struct buffer *buffer; | |
b45433b3 JB |
1436 | int start, end; |
1437 | { | |
04a759c8 JB |
1438 | struct buffer *old_buffer = current_buffer; |
1439 | ||
1440 | if (buffer != old_buffer) | |
1441 | set_buffer_internal (buffer); | |
1442 | ||
d206af14 | 1443 | prepare_to_modify_buffer (start, end, NULL); |
b45433b3 | 1444 | |
894ab630 RS |
1445 | if (start - 1 < beg_unchanged |
1446 | || (unchanged_modified == MODIFF | |
1447 | && overlay_unchanged_modified == OVERLAY_MODIFF)) | |
b45433b3 JB |
1448 | beg_unchanged = start - 1; |
1449 | if (Z - end < end_unchanged | |
894ab630 RS |
1450 | || (unchanged_modified == MODIFF |
1451 | && overlay_unchanged_modified == OVERLAY_MODIFF)) | |
b45433b3 | 1452 | end_unchanged = Z - end; |
83010cd6 | 1453 | |
9fbf87cd | 1454 | if (MODIFF <= SAVE_MODIFF) |
83010cd6 | 1455 | record_first_change (); |
b45433b3 | 1456 | MODIFF++; |
04a759c8 | 1457 | |
069cdc4f RS |
1458 | buffer->point_before_scroll = Qnil; |
1459 | ||
04a759c8 JB |
1460 | if (buffer != old_buffer) |
1461 | set_buffer_internal (old_buffer); | |
b45433b3 | 1462 | } |
d206af14 | 1463 | \f |
3be11131 RS |
1464 | /* Check that it is okay to modify the buffer between START and END, |
1465 | which are char positions. | |
1466 | ||
679194a6 JA |
1467 | Run the before-change-function, if any. If intervals are in use, |
1468 | verify that the text to be modified is not read-only, and call | |
d206af14 RS |
1469 | any modification properties the text may have. |
1470 | ||
1471 | If PRESERVE_PTR is nonzero, we relocate *PRESERVE_PTR | |
1472 | by holding its value temporarily in a marker. */ | |
b45433b3 | 1473 | |
c660b094 | 1474 | void |
d206af14 | 1475 | prepare_to_modify_buffer (start, end, preserve_ptr) |
fb4ee5cd | 1476 | int start, end; |
d206af14 | 1477 | int *preserve_ptr; |
b45433b3 | 1478 | { |
d427b66a | 1479 | if (!NILP (current_buffer->read_only)) |
b45433b3 JB |
1480 | Fbarf_if_buffer_read_only (); |
1481 | ||
679194a6 | 1482 | /* Only defined if Emacs is compiled with USE_TEXT_PROPERTIES */ |
9fbf87cd | 1483 | if (BUF_INTERVALS (current_buffer) != 0) |
d206af14 RS |
1484 | { |
1485 | if (preserve_ptr) | |
1486 | { | |
1487 | Lisp_Object preserve_marker; | |
1488 | struct gcpro gcpro1; | |
1489 | preserve_marker = Fcopy_marker (make_number (*preserve_ptr), Qnil); | |
1490 | GCPRO1 (preserve_marker); | |
1491 | verify_interval_modification (current_buffer, start, end); | |
1492 | *preserve_ptr = marker_position (preserve_marker); | |
1493 | unchain_marker (preserve_marker); | |
1494 | UNGCPRO; | |
1495 | } | |
1496 | else | |
1497 | verify_interval_modification (current_buffer, start, end); | |
1498 | } | |
b45433b3 JB |
1499 | |
1500 | #ifdef CLASH_DETECTION | |
f173b650 | 1501 | if (!NILP (current_buffer->file_truename) |
ab6c5c0c RS |
1502 | /* Make binding buffer-file-name to nil effective. */ |
1503 | && !NILP (current_buffer->filename) | |
9fbf87cd | 1504 | && SAVE_MODIFF >= MODIFF) |
f173b650 | 1505 | lock_file (current_buffer->file_truename); |
b45433b3 JB |
1506 | #else |
1507 | /* At least warn if this file has changed on disk since it was visited. */ | |
d427b66a | 1508 | if (!NILP (current_buffer->filename) |
9fbf87cd | 1509 | && SAVE_MODIFF >= MODIFF |
d427b66a JB |
1510 | && NILP (Fverify_visited_file_modtime (Fcurrent_buffer ())) |
1511 | && !NILP (Ffile_exists_p (current_buffer->filename))) | |
b45433b3 JB |
1512 | call1 (intern ("ask-user-about-supersession-threat"), |
1513 | current_buffer->filename); | |
1514 | #endif /* not CLASH_DETECTION */ | |
1515 | ||
d206af14 | 1516 | signal_before_change (start, end, preserve_ptr); |
2f545eea | 1517 | |
56e1065e JB |
1518 | if (current_buffer->newline_cache) |
1519 | invalidate_region_cache (current_buffer, | |
1520 | current_buffer->newline_cache, | |
1521 | start - BEG, Z - end); | |
1522 | if (current_buffer->width_run_cache) | |
1523 | invalidate_region_cache (current_buffer, | |
1524 | current_buffer->width_run_cache, | |
1525 | start - BEG, Z - end); | |
1526 | ||
2f545eea | 1527 | Vdeactivate_mark = Qt; |
b45433b3 JB |
1528 | } |
1529 | \f | |
d206af14 RS |
1530 | /* These macros work with an argument named `preserve_ptr' |
1531 | and a local variable named `preserve_marker'. */ | |
1532 | ||
1533 | #define PRESERVE_VALUE \ | |
1534 | if (preserve_ptr && NILP (preserve_marker)) \ | |
1535 | preserve_marker = Fcopy_marker (make_number (*preserve_ptr), Qnil) | |
1536 | ||
1537 | #define RESTORE_VALUE \ | |
1538 | if (! NILP (preserve_marker)) \ | |
1539 | { \ | |
1540 | *preserve_ptr = marker_position (preserve_marker); \ | |
1541 | unchain_marker (preserve_marker); \ | |
1542 | } | |
1543 | ||
b86e0aaf RS |
1544 | #define PRESERVE_START_END \ |
1545 | if (NILP (start_marker)) \ | |
1546 | start_marker = Fcopy_marker (start, Qnil); \ | |
1547 | if (NILP (end_marker)) \ | |
1548 | end_marker = Fcopy_marker (end, Qnil); | |
1549 | ||
1550 | #define FETCH_START \ | |
1551 | (! NILP (start_marker) ? Fmarker_position (start_marker) : start) | |
1552 | ||
1553 | #define FETCH_END \ | |
1554 | (! NILP (end_marker) ? Fmarker_position (end_marker) : end) | |
1555 | ||
eb8c3be9 | 1556 | /* Signal a change to the buffer immediately before it happens. |
d206af14 RS |
1557 | START_INT and END_INT are the bounds of the text to be changed. |
1558 | ||
1559 | If PRESERVE_PTR is nonzero, we relocate *PRESERVE_PTR | |
1560 | by holding its value temporarily in a marker. */ | |
b45433b3 | 1561 | |
c660b094 | 1562 | void |
d206af14 | 1563 | signal_before_change (start_int, end_int, preserve_ptr) |
6022d493 | 1564 | int start_int, end_int; |
d206af14 | 1565 | int *preserve_ptr; |
b45433b3 | 1566 | { |
fb4ee5cd | 1567 | Lisp_Object start, end; |
b86e0aaf | 1568 | Lisp_Object start_marker, end_marker; |
d206af14 | 1569 | Lisp_Object preserve_marker; |
b86e0aaf | 1570 | struct gcpro gcpro1, gcpro2, gcpro3; |
fb4ee5cd RS |
1571 | |
1572 | start = make_number (start_int); | |
1573 | end = make_number (end_int); | |
d206af14 | 1574 | preserve_marker = Qnil; |
b86e0aaf RS |
1575 | start_marker = Qnil; |
1576 | end_marker = Qnil; | |
1577 | GCPRO3 (preserve_marker, start_marker, end_marker); | |
fb4ee5cd | 1578 | |
b45433b3 | 1579 | /* If buffer is unmodified, run a special hook for that case. */ |
9fbf87cd | 1580 | if (SAVE_MODIFF >= MODIFF |
dbc4e1c1 JB |
1581 | && !NILP (Vfirst_change_hook) |
1582 | && !NILP (Vrun_hooks)) | |
d206af14 RS |
1583 | { |
1584 | PRESERVE_VALUE; | |
b86e0aaf | 1585 | PRESERVE_START_END; |
d206af14 RS |
1586 | call1 (Vrun_hooks, Qfirst_change_hook); |
1587 | } | |
dbc4e1c1 | 1588 | |
3d1e2d9c RS |
1589 | /* Run the before-change-function if any. |
1590 | We don't bother "binding" this variable to nil | |
1591 | because it is obsolete anyway and new code should not use it. */ | |
d427b66a | 1592 | if (!NILP (Vbefore_change_function)) |
d206af14 RS |
1593 | { |
1594 | PRESERVE_VALUE; | |
b86e0aaf RS |
1595 | PRESERVE_START_END; |
1596 | call2 (Vbefore_change_function, FETCH_START, FETCH_END); | |
d206af14 | 1597 | } |
e45fb8bf | 1598 | |
3d1e2d9c | 1599 | /* Now run the before-change-functions if any. */ |
e45fb8bf RS |
1600 | if (!NILP (Vbefore_change_functions)) |
1601 | { | |
3d1e2d9c RS |
1602 | Lisp_Object args[3]; |
1603 | Lisp_Object before_change_functions; | |
1604 | Lisp_Object after_change_functions; | |
1605 | struct gcpro gcpro1, gcpro2; | |
1606 | ||
d206af14 | 1607 | PRESERVE_VALUE; |
b86e0aaf | 1608 | PRESERVE_START_END; |
d206af14 | 1609 | |
3d1e2d9c RS |
1610 | /* "Bind" before-change-functions and after-change-functions |
1611 | to nil--but in a way that errors don't know about. | |
1612 | That way, if there's an error in them, they will stay nil. */ | |
1613 | before_change_functions = Vbefore_change_functions; | |
1614 | after_change_functions = Vafter_change_functions; | |
c82c1da0 KH |
1615 | Vbefore_change_functions = Qnil; |
1616 | Vafter_change_functions = Qnil; | |
3d1e2d9c RS |
1617 | GCPRO2 (before_change_functions, after_change_functions); |
1618 | ||
1619 | /* Actually run the hook functions. */ | |
1620 | args[0] = Qbefore_change_functions; | |
b86e0aaf RS |
1621 | args[1] = FETCH_START; |
1622 | args[2] = FETCH_END; | |
3d1e2d9c RS |
1623 | run_hook_list_with_args (before_change_functions, 3, args); |
1624 | ||
1625 | /* "Unbind" the variables we "bound" to nil. */ | |
1626 | Vbefore_change_functions = before_change_functions; | |
1627 | Vafter_change_functions = after_change_functions; | |
1628 | UNGCPRO; | |
e45fb8bf | 1629 | } |
d07c0804 RS |
1630 | |
1631 | if (!NILP (current_buffer->overlays_before) | |
1632 | || !NILP (current_buffer->overlays_after)) | |
d206af14 RS |
1633 | { |
1634 | PRESERVE_VALUE; | |
b86e0aaf RS |
1635 | report_overlay_modification (FETCH_START, FETCH_END, 0, |
1636 | FETCH_START, FETCH_END, Qnil); | |
d206af14 RS |
1637 | } |
1638 | ||
b86e0aaf RS |
1639 | if (! NILP (start_marker)) |
1640 | free_marker (start_marker); | |
1641 | if (! NILP (end_marker)) | |
1642 | free_marker (end_marker); | |
d206af14 RS |
1643 | RESTORE_VALUE; |
1644 | UNGCPRO; | |
b45433b3 JB |
1645 | } |
1646 | ||
eb8c3be9 | 1647 | /* Signal a change immediately after it happens. |
3be11131 | 1648 | CHARPOS is the character position of the start of the changed text. |
b45433b3 JB |
1649 | LENDEL is the number of characters of the text before the change. |
1650 | (Not the whole buffer; just the part that was changed.) | |
8b09e5d0 RS |
1651 | LENINS is the number of characters in that part of the text |
1652 | after the change. */ | |
b45433b3 | 1653 | |
c660b094 | 1654 | void |
3be11131 RS |
1655 | signal_after_change (charpos, lendel, lenins) |
1656 | int charpos, lendel, lenins; | |
b45433b3 | 1657 | { |
fb2e7d14 RS |
1658 | /* If we are deferring calls to the after-change functions |
1659 | and there are no before-change functions, | |
1660 | just record the args that we were going to use. */ | |
1661 | if (! NILP (Vcombine_after_change_calls) | |
1662 | && NILP (Vbefore_change_function) && NILP (Vbefore_change_functions) | |
1663 | && NILP (current_buffer->overlays_before) | |
1664 | && NILP (current_buffer->overlays_after)) | |
1665 | { | |
1666 | Lisp_Object elt; | |
1667 | ||
1668 | if (!NILP (combine_after_change_list) | |
1669 | && current_buffer != XBUFFER (combine_after_change_buffer)) | |
1670 | Fcombine_after_change_execute (); | |
1671 | ||
3be11131 RS |
1672 | elt = Fcons (make_number (charpos - BEG), |
1673 | Fcons (make_number (Z - (charpos - lendel + lenins)), | |
fb2e7d14 RS |
1674 | Fcons (make_number (lenins - lendel), Qnil))); |
1675 | combine_after_change_list | |
1676 | = Fcons (elt, combine_after_change_list); | |
1677 | combine_after_change_buffer = Fcurrent_buffer (); | |
1678 | ||
1679 | return; | |
1680 | } | |
1681 | ||
1682 | if (!NILP (combine_after_change_list)) | |
1683 | Fcombine_after_change_execute (); | |
1684 | ||
3d1e2d9c RS |
1685 | /* Run the after-change-function if any. |
1686 | We don't bother "binding" this variable to nil | |
1687 | because it is obsolete anyway and new code should not use it. */ | |
d427b66a | 1688 | if (!NILP (Vafter_change_function)) |
3d1e2d9c | 1689 | call3 (Vafter_change_function, |
3be11131 | 1690 | make_number (charpos), make_number (charpos + lenins), |
3d1e2d9c | 1691 | make_number (lendel)); |
b45433b3 | 1692 | |
e45fb8bf RS |
1693 | if (!NILP (Vafter_change_functions)) |
1694 | { | |
3d1e2d9c RS |
1695 | Lisp_Object args[4]; |
1696 | Lisp_Object before_change_functions; | |
1697 | Lisp_Object after_change_functions; | |
1698 | struct gcpro gcpro1, gcpro2; | |
1699 | ||
1700 | /* "Bind" before-change-functions and after-change-functions | |
1701 | to nil--but in a way that errors don't know about. | |
1702 | That way, if there's an error in them, they will stay nil. */ | |
1703 | before_change_functions = Vbefore_change_functions; | |
1704 | after_change_functions = Vafter_change_functions; | |
c82c1da0 KH |
1705 | Vbefore_change_functions = Qnil; |
1706 | Vafter_change_functions = Qnil; | |
3d1e2d9c RS |
1707 | GCPRO2 (before_change_functions, after_change_functions); |
1708 | ||
1709 | /* Actually run the hook functions. */ | |
1710 | args[0] = Qafter_change_functions; | |
3be11131 RS |
1711 | XSETFASTINT (args[1], charpos); |
1712 | XSETFASTINT (args[2], charpos + lenins); | |
3d1e2d9c RS |
1713 | XSETFASTINT (args[3], lendel); |
1714 | run_hook_list_with_args (after_change_functions, | |
1715 | 4, args); | |
1716 | ||
1717 | /* "Unbind" the variables we "bound" to nil. */ | |
1718 | Vbefore_change_functions = before_change_functions; | |
1719 | Vafter_change_functions = after_change_functions; | |
1720 | UNGCPRO; | |
e45fb8bf | 1721 | } |
d07c0804 RS |
1722 | |
1723 | if (!NILP (current_buffer->overlays_before) | |
1724 | || !NILP (current_buffer->overlays_after)) | |
3be11131 RS |
1725 | report_overlay_modification (make_number (charpos), |
1726 | make_number (charpos + lenins), | |
d07c0804 | 1727 | 1, |
3be11131 RS |
1728 | make_number (charpos), |
1729 | make_number (charpos + lenins), | |
d07c0804 | 1730 | make_number (lendel)); |
c5ca0786 RS |
1731 | |
1732 | /* After an insertion, call the text properties | |
1733 | insert-behind-hooks or insert-in-front-hooks. */ | |
1734 | if (lendel == 0) | |
3be11131 | 1735 | report_interval_modification (charpos, charpos + lenins); |
b45433b3 | 1736 | } |
fb2e7d14 RS |
1737 | |
1738 | Lisp_Object | |
1739 | Fcombine_after_change_execute_1 (val) | |
1740 | Lisp_Object val; | |
1741 | { | |
1742 | Vcombine_after_change_calls = val; | |
1743 | return val; | |
1744 | } | |
1745 | ||
1746 | DEFUN ("combine-after-change-execute", Fcombine_after_change_execute, | |
1747 | Scombine_after_change_execute, 0, 0, 0, | |
1748 | "This function is for use internally in `combine-after-change-calls'.") | |
1749 | () | |
1750 | { | |
1751 | register Lisp_Object val; | |
1752 | int count = specpdl_ptr - specpdl; | |
1753 | int beg, end, change; | |
1754 | int begpos, endpos; | |
1755 | Lisp_Object tail; | |
1756 | ||
1757 | record_unwind_protect (Fset_buffer, Fcurrent_buffer ()); | |
1758 | ||
1759 | Fset_buffer (combine_after_change_buffer); | |
1760 | ||
1761 | /* # chars unchanged at beginning of buffer. */ | |
1762 | beg = Z - BEG; | |
1763 | /* # chars unchanged at end of buffer. */ | |
1764 | end = beg; | |
1765 | /* Total amount of insertion (negative for deletion). */ | |
1766 | change = 0; | |
1767 | ||
1768 | /* Scan the various individual changes, | |
1769 | accumulating the range info in BEG, END and CHANGE. */ | |
1770 | for (tail = combine_after_change_list; CONSP (tail); | |
1771 | tail = XCONS (tail)->cdr) | |
1772 | { | |
e688a080 KH |
1773 | Lisp_Object elt; |
1774 | int thisbeg, thisend, thischange; | |
fb2e7d14 RS |
1775 | |
1776 | /* Extract the info from the next element. */ | |
1777 | elt = XCONS (tail)->car; | |
1778 | if (! CONSP (elt)) | |
1779 | continue; | |
1780 | thisbeg = XINT (XCONS (elt)->car); | |
1781 | ||
1782 | elt = XCONS (elt)->cdr; | |
1783 | if (! CONSP (elt)) | |
1784 | continue; | |
1785 | thisend = XINT (XCONS (elt)->car); | |
1786 | ||
1787 | elt = XCONS (elt)->cdr; | |
1788 | if (! CONSP (elt)) | |
1789 | continue; | |
1790 | thischange = XINT (XCONS (elt)->car); | |
1791 | ||
1792 | /* Merge this range into the accumulated range. */ | |
1793 | change += thischange; | |
1794 | if (thisbeg < beg) | |
1795 | beg = thisbeg; | |
1796 | if (thisend < end) | |
1797 | end = thisend; | |
1798 | } | |
1799 | ||
1800 | /* Get the current start and end positions of the range | |
1801 | that was changed. */ | |
1802 | begpos = BEG + beg; | |
1803 | endpos = Z - end; | |
1804 | ||
1805 | /* We are about to handle these, so discard them. */ | |
1806 | combine_after_change_list = Qnil; | |
1807 | ||
1808 | /* Now run the after-change functions for real. | |
1809 | Turn off the flag that defers them. */ | |
1810 | record_unwind_protect (Fcombine_after_change_execute_1, | |
1811 | Vcombine_after_change_calls); | |
1812 | signal_after_change (begpos, endpos - begpos - change, endpos - begpos); | |
1813 | ||
1814 | return unbind_to (count, val); | |
1815 | } | |
1816 | \f | |
1817 | syms_of_insdel () | |
1818 | { | |
1819 | staticpro (&combine_after_change_list); | |
1820 | combine_after_change_list = Qnil; | |
1821 | ||
1822 | DEFVAR_LISP ("combine-after-change-calls", &Vcombine_after_change_calls, | |
1823 | "Used internally by the `combine-after-change-calls' macro."); | |
1824 | Vcombine_after_change_calls = Qnil; | |
1825 | ||
1826 | defsubr (&Scombine_after_change_execute); | |
1827 | } |