Commit | Line | Data |
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632a8dd6 | 1 | /* Calculate what line insertion or deletion to do, and do it, |
3a22ee35 | 2 | Copyright (C) 1985, 1986, 1990, 1993, 1994 Free Software Foundation, Inc. |
632a8dd6 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 | |
e5d77022 | 8 | the Free Software Foundation; either version 2, or (at your option) |
632a8dd6 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. */ | |
632a8dd6 JB |
20 | |
21 | ||
18160b98 | 22 | #include <config.h> |
89700111 GM |
23 | #include <stdio.h> |
24 | #include <string.h> | |
632a8dd6 JB |
25 | #include "termchar.h" |
26 | #include "lisp.h" | |
27 | #include "dispextern.h" | |
2538fae4 | 28 | #include "keyboard.h" |
0137dbf7 | 29 | #include "frame.h" |
89700111 | 30 | #include "window.h" |
632a8dd6 JB |
31 | |
32 | #define max(a, b) ((a) > (b) ? (a) : (b)) | |
33 | #define min(a, b) ((a) < (b) ? (a) : (b)) | |
34 | ||
35 | /* All costs measured in characters. | |
0137dbf7 | 36 | So no cost can exceed the area of a frame, measured in characters. |
61df1a5e | 37 | Let's hope this is never more than 1000000 characters. */ |
632a8dd6 | 38 | |
61df1a5e | 39 | #define INFINITY 1000000 |
632a8dd6 JB |
40 | |
41 | struct matrix_elt | |
42 | { | |
43 | /* Cost of outputting through this line | |
44 | if no insert/delete is done just above it. */ | |
61df1a5e | 45 | int writecost; |
632a8dd6 JB |
46 | /* Cost of outputting through this line |
47 | if an insert is done just above it. */ | |
61df1a5e | 48 | int insertcost; |
632a8dd6 JB |
49 | /* Cost of outputting through this line |
50 | if a delete is done just above it. */ | |
61df1a5e | 51 | int deletecost; |
632a8dd6 JB |
52 | /* Number of inserts so far in this run of inserts, |
53 | for the cost in insertcost. */ | |
61df1a5e | 54 | unsigned char insertcount; |
632a8dd6 JB |
55 | /* Number of deletes so far in this run of deletes, |
56 | for the cost in deletecost. */ | |
61df1a5e | 57 | unsigned char deletecount; |
1af1b1e8 RS |
58 | /* Number of writes so far since the last insert |
59 | or delete for the cost in writecost. */ | |
60 | unsigned char writecount; | |
632a8dd6 JB |
61 | }; |
62 | ||
89700111 GM |
63 | static void do_direct_scrolling P_ ((struct glyph_matrix *, |
64 | struct matrix_elt *, | |
65 | int, int)); | |
66 | static void do_scrolling P_ ((struct glyph_matrix *, | |
67 | struct matrix_elt *, | |
68 | int, int)); | |
69 | ||
632a8dd6 | 70 | \f |
1af1b1e8 RS |
71 | /* Determine, in matrix[i,j], the cost of updating the first j old |
72 | lines into the first i new lines using the general scrolling method. | |
632a8dd6 JB |
73 | This involves using insert or delete somewhere if i != j. |
74 | For each matrix elements, three kinds of costs are recorded: | |
75 | the smallest cost that ends with an insert, the smallest | |
76 | cost that ends with a delete, and the smallest cost that | |
77 | ends with neither one. These are kept separate because | |
78 | on some terminals the cost of doing an insert varies | |
79 | depending on whether one was just done, etc. */ | |
80 | ||
81 | /* draw_cost[VPOS] is the cost of outputting new line at VPOS. | |
82 | old_hash[VPOS] is the hash code of the old line at VPOS. | |
83 | new_hash[VPOS] is the hash code of the new line at VPOS. | |
0137dbf7 | 84 | Note that these are not true frame vpos's, but relative |
632a8dd6 JB |
85 | to the place at which the first mismatch between old and |
86 | new contents appears. */ | |
87 | ||
88 | static void | |
0137dbf7 | 89 | calculate_scrolling (frame, matrix, window_size, lines_below, |
632a8dd6 JB |
90 | draw_cost, old_hash, new_hash, |
91 | free_at_end) | |
0137dbf7 | 92 | FRAME_PTR frame; |
632a8dd6 JB |
93 | /* matrix is of size window_size + 1 on each side. */ |
94 | struct matrix_elt *matrix; | |
95 | int window_size; | |
96 | int *draw_cost; | |
97 | int *old_hash; | |
98 | int *new_hash; | |
99 | int free_at_end; | |
100 | { | |
101 | register int i, j; | |
0137dbf7 | 102 | int frame_height = FRAME_HEIGHT (frame); |
632a8dd6 JB |
103 | register struct matrix_elt *p, *p1; |
104 | register int cost, cost1; | |
105 | ||
106 | int lines_moved = window_size + (scroll_region_ok ? 0 : lines_below); | |
107 | /* first_insert_cost[I] is the cost of doing the first insert-line | |
89700111 | 108 | at the i'th line of the lines we are considering, |
632a8dd6 JB |
109 | where I is origin 1 (as it is below). */ |
110 | int *first_insert_cost | |
0137dbf7 | 111 | = &FRAME_INSERT_COST (frame)[frame_height - 1 - lines_moved]; |
632a8dd6 | 112 | int *first_delete_cost |
0137dbf7 | 113 | = &FRAME_DELETE_COST (frame)[frame_height - 1 - lines_moved]; |
632a8dd6 | 114 | int *next_insert_cost |
0137dbf7 | 115 | = &FRAME_INSERTN_COST (frame)[frame_height - 1 - lines_moved]; |
632a8dd6 | 116 | int *next_delete_cost |
0137dbf7 | 117 | = &FRAME_DELETEN_COST (frame)[frame_height - 1 - lines_moved]; |
632a8dd6 JB |
118 | |
119 | /* Discourage long scrolls on fast lines. | |
0137dbf7 | 120 | Don't scroll nearly a full frame height unless it saves |
632a8dd6 | 121 | at least 1/4 second. */ |
0137dbf7 | 122 | int extra_cost = baud_rate / (10 * 4 * FRAME_HEIGHT (frame)); |
632a8dd6 | 123 | |
7fb08f69 RS |
124 | if (baud_rate <= 0) |
125 | extra_cost = 1; | |
126 | ||
632a8dd6 JB |
127 | /* initialize the top left corner of the matrix */ |
128 | matrix->writecost = 0; | |
129 | matrix->insertcost = INFINITY; | |
130 | matrix->deletecost = INFINITY; | |
131 | matrix->insertcount = 0; | |
132 | matrix->deletecount = 0; | |
133 | ||
134 | /* initialize the left edge of the matrix */ | |
135 | cost = first_insert_cost[1] - next_insert_cost[1]; | |
136 | for (i = 1; i <= window_size; i++) | |
137 | { | |
138 | p = matrix + i * (window_size + 1); | |
139 | cost += draw_cost[i] + next_insert_cost[i] + extra_cost; | |
140 | p->insertcost = cost; | |
141 | p->writecost = INFINITY; | |
142 | p->deletecost = INFINITY; | |
143 | p->insertcount = i; | |
144 | p->deletecount = 0; | |
145 | } | |
146 | ||
147 | /* initialize the top edge of the matrix */ | |
148 | cost = first_delete_cost[1] - next_delete_cost[1]; | |
149 | for (j = 1; j <= window_size; j++) | |
150 | { | |
151 | cost += next_delete_cost[j]; | |
152 | matrix[j].deletecost = cost; | |
153 | matrix[j].writecost = INFINITY; | |
154 | matrix[j].insertcost = INFINITY; | |
155 | matrix[j].deletecount = j; | |
156 | matrix[j].insertcount = 0; | |
157 | } | |
158 | ||
0137dbf7 JB |
159 | /* `i' represents the vpos among new frame contents. |
160 | `j' represents the vpos among the old frame contents. */ | |
632a8dd6 JB |
161 | p = matrix + window_size + 2; /* matrix [1, 1] */ |
162 | for (i = 1; i <= window_size; i++, p++) | |
163 | for (j = 1; j <= window_size; j++, p++) | |
164 | { | |
165 | /* p contains the address of matrix [i, j] */ | |
166 | ||
167 | /* First calculate the cost assuming we do | |
168 | not insert or delete above this line. | |
169 | That is, if we update through line i-1 | |
170 | based on old lines through j-1, | |
171 | and then just change old line j to new line i. */ | |
172 | p1 = p - window_size - 2; /* matrix [i-1, j-1] */ | |
173 | cost = p1->writecost; | |
174 | if (cost > p1->insertcost) | |
175 | cost = p1->insertcost; | |
176 | if (cost > p1->deletecost) | |
177 | cost = p1->deletecost; | |
178 | if (old_hash[j] != new_hash[i]) | |
179 | cost += draw_cost[i]; | |
180 | p->writecost = cost; | |
181 | ||
182 | /* Calculate the cost if we do an insert-line | |
183 | before outputting this line. | |
184 | That is, we update through line i-1 | |
185 | based on old lines through j, | |
186 | do an insert-line on line i, | |
187 | and then output line i from scratch, | |
188 | leaving old lines starting from j for reuse below. */ | |
189 | p1 = p - window_size - 1; /* matrix [i-1, j] */ | |
190 | /* No need to think about doing a delete followed | |
191 | immediately by an insert. It cannot be as good | |
192 | as not doing either of them. */ | |
193 | if (free_at_end == i) | |
194 | { | |
195 | cost = p1->writecost; | |
196 | cost1 = p1->insertcost; | |
197 | } | |
198 | else | |
199 | { | |
200 | cost = p1->writecost + first_insert_cost[i]; | |
0fe4741d | 201 | if ((int) p1->insertcount > i) |
632a8dd6 JB |
202 | abort (); |
203 | cost1 = p1->insertcost + next_insert_cost[i - p1->insertcount]; | |
204 | } | |
205 | p->insertcost = min (cost, cost1) + draw_cost[i] + extra_cost; | |
206 | p->insertcount = (cost < cost1) ? 1 : p1->insertcount + 1; | |
0fe4741d | 207 | if ((int) p->insertcount > i) |
632a8dd6 JB |
208 | abort (); |
209 | ||
210 | /* Calculate the cost if we do a delete line after | |
211 | outputting this line. | |
212 | That is, we update through line i | |
213 | based on old lines through j-1, | |
214 | and throw away old line j. */ | |
215 | p1 = p - 1; /* matrix [i, j-1] */ | |
216 | /* No need to think about doing an insert followed | |
217 | immediately by a delete. */ | |
218 | if (free_at_end == i) | |
219 | { | |
220 | cost = p1->writecost; | |
221 | cost1 = p1->deletecost; | |
222 | } | |
223 | else | |
224 | { | |
225 | cost = p1->writecost + first_delete_cost[i]; | |
226 | cost1 = p1->deletecost + next_delete_cost[i]; | |
227 | } | |
228 | p->deletecost = min (cost, cost1); | |
229 | p->deletecount = (cost < cost1) ? 1 : p1->deletecount + 1; | |
230 | } | |
231 | } | |
89700111 GM |
232 | |
233 | ||
632a8dd6 | 234 | \f |
89700111 GM |
235 | /* Perform insert-lines and delete-lines operations on CURRENT_MATRIX |
236 | according to the costs in MATRIX, using the general scrolling | |
237 | method that is used if the terminal does not support the setting of | |
238 | scroll windows (scroll_region_ok == 0). | |
2d810f84 RS |
239 | |
240 | WINDOW_SIZE is the number of lines being considered for scrolling | |
89700111 GM |
241 | and UNCHANGED_AT_TOP is the vpos of the first line being |
242 | considered. These two arguments can specify any contiguous range | |
243 | of lines. */ | |
2d810f84 | 244 | |
632a8dd6 | 245 | static void |
89700111 GM |
246 | do_scrolling (current_matrix, matrix, window_size, unchanged_at_top) |
247 | struct glyph_matrix *current_matrix; | |
632a8dd6 JB |
248 | struct matrix_elt *matrix; |
249 | int window_size; | |
250 | int unchanged_at_top; | |
251 | { | |
89700111 GM |
252 | struct matrix_elt *p; |
253 | int i, j, k; | |
254 | ||
255 | /* Set to 1 if we have set a terminal window with | |
256 | set_terminal_window. */ | |
257 | int terminal_window_p = 0; | |
258 | ||
259 | /* A queue for line insertions to be done. */ | |
260 | struct queue { int count, pos; }; | |
261 | struct queue *queue_start | |
262 | = (struct queue *) alloca (current_matrix->nrows * sizeof (struct queue)); | |
263 | struct queue *queue = queue_start; | |
264 | ||
265 | char *retained_p = (char *) alloca (window_size * sizeof (char)); | |
266 | int *copy_from = (int *) alloca (window_size * sizeof (int)); | |
267 | ||
268 | /* Zero means line is empty. */ | |
269 | bzero (retained_p, window_size * sizeof (char)); | |
270 | for (k = 0; k < window_size; ++k) | |
271 | copy_from[k] = -1; | |
272 | ||
b96f9fb7 | 273 | #define CHECK_BOUNDS \ |
89700111 GM |
274 | do \ |
275 | { \ | |
276 | int k; \ | |
277 | for (k = 0; k < window_size; ++k) \ | |
278 | xassert (copy_from[k] == -1 \ | |
279 | || (copy_from[k] >= 0 && copy_from[k] < window_size)); \ | |
280 | } \ | |
281 | while (0); | |
282 | ||
283 | /* When j is advanced, this corresponds to deleted lines. | |
284 | When i is advanced, this corresponds to inserted lines. */ | |
632a8dd6 | 285 | i = j = window_size; |
632a8dd6 JB |
286 | while (i > 0 || j > 0) |
287 | { | |
288 | p = matrix + i * (window_size + 1) + j; | |
89700111 GM |
289 | |
290 | if (p->insertcost < p->writecost && p->insertcost < p->deletecost) | |
632a8dd6 | 291 | { |
89700111 GM |
292 | /* Insert should be done at vpos i-1, plus maybe some before. |
293 | Queue the screen operation to be performed. */ | |
294 | queue->count = p->insertcount; | |
295 | queue->pos = i + unchanged_at_top - p->insertcount; | |
296 | ++queue; | |
297 | ||
298 | /* By incrementing I, we leave room in the result rows | |
299 | for the empty rows opened up. */ | |
632a8dd6 | 300 | i -= p->insertcount; |
632a8dd6 JB |
301 | } |
302 | else if (p->deletecost < p->writecost) | |
303 | { | |
89700111 GM |
304 | /* Old line at vpos j-1, and maybe some before it, should be |
305 | deleted. By decrementing J, we skip some lines in the | |
306 | temp_rows which is equivalent to omitting these lines in | |
307 | the result rows, thus deleting them. */ | |
632a8dd6 | 308 | j -= p->deletecount; |
89700111 GM |
309 | |
310 | /* Set the terminal window, if not done already. */ | |
311 | if (! terminal_window_p) | |
632a8dd6 JB |
312 | { |
313 | set_terminal_window (window_size + unchanged_at_top); | |
89700111 | 314 | terminal_window_p = 1; |
632a8dd6 | 315 | } |
89700111 GM |
316 | |
317 | /* Delete lines on the terminal. */ | |
632a8dd6 JB |
318 | ins_del_lines (j + unchanged_at_top, - p->deletecount); |
319 | } | |
320 | else | |
321 | { | |
89700111 GM |
322 | /* Best thing done here is no insert or delete, i.e. a write. */ |
323 | --i, --j; | |
324 | xassert (i >= 0 && i < window_size); | |
325 | xassert (j >= 0 && j < window_size); | |
326 | copy_from[i] = j; | |
327 | retained_p[j] = 1; | |
328 | ||
329 | #if GLYPH_DEBUG | |
b96f9fb7 | 330 | CHECK_BOUNDS; |
89700111 | 331 | #endif |
632a8dd6 JB |
332 | } |
333 | } | |
334 | ||
89700111 GM |
335 | /* Now do all insertions queued above. */ |
336 | if (queue > queue_start) | |
632a8dd6 | 337 | { |
89700111 | 338 | int next = -1; |
632a8dd6 | 339 | |
89700111 GM |
340 | /* Set the terminal window if not yet done. */ |
341 | if (!terminal_window_p) | |
342 | { | |
343 | set_terminal_window (window_size + unchanged_at_top); | |
344 | terminal_window_p = 1; | |
345 | } | |
632a8dd6 | 346 | |
89700111 | 347 | do |
632a8dd6 | 348 | { |
89700111 GM |
349 | --queue; |
350 | ||
351 | /* Do the deletion on the terminal. */ | |
352 | ins_del_lines (queue->pos, queue->count); | |
353 | ||
354 | /* All lines in the range deleted become empty in the glyph | |
355 | matrix. Assign to them glyph rows that are not retained. | |
356 | K is the starting position of the deleted range relative | |
357 | to the window we are working in. */ | |
358 | k = queue->pos - unchanged_at_top; | |
359 | for (j = 0; j < queue->count; ++j) | |
360 | { | |
361 | /* Find the next row not retained. */ | |
362 | while (retained_p[++next]) | |
363 | ; | |
364 | ||
365 | /* Record that this row is to be used for the empty | |
366 | glyph row j. */ | |
367 | copy_from[k + j] = next; | |
368 | } | |
632a8dd6 | 369 | } |
89700111 GM |
370 | while (queue > queue_start); |
371 | ||
632a8dd6 JB |
372 | } |
373 | ||
89700111 GM |
374 | for (k = 0; k < window_size; ++k) |
375 | xassert (copy_from[k] >= 0 && copy_from[k] < window_size); | |
376 | ||
377 | /* Perform the row swizzling. */ | |
378 | mirrored_line_dance (current_matrix, unchanged_at_top, window_size, | |
379 | copy_from, retained_p); | |
380 | ||
381 | /* Some sanity checks if GLYPH_DEBUG != 0. */ | |
382 | CHECK_MATRIX (current_matrix); | |
383 | ||
384 | if (terminal_window_p) | |
632a8dd6 JB |
385 | set_terminal_window (0); |
386 | } | |
89700111 | 387 | |
632a8dd6 | 388 | \f |
1af1b1e8 RS |
389 | /* Determine, in matrix[i,j], the cost of updating the first j |
390 | old lines into the first i new lines using the direct | |
391 | scrolling method. When the old line and the new line have | |
392 | different hash codes, the calculated cost of updating old | |
393 | line j into new line i includes the cost of outputting new | |
394 | line i, and if i != j, the cost of outputting the old line j | |
395 | is also included, as a penalty for moving the line and then | |
396 | erasing it. In addition, the cost of updating a sequence of | |
397 | lines with constant i - j includes the cost of scrolling the | |
398 | old lines into their new positions, unless i == j. Scrolling | |
399 | is achieved by setting the screen window to avoid affecting | |
400 | other lines below, and inserting or deleting lines at the top | |
401 | of the scrolled region. The cost of scrolling a sequence of | |
402 | lines includes the fixed cost of specifying a scroll region, | |
403 | plus a variable cost which can depend upon the number of lines | |
404 | involved and the distance by which they are scrolled, and an | |
405 | extra cost to discourage long scrolls. | |
406 | ||
407 | As reflected in the matrix, an insert or delete does not | |
408 | correspond directly to the insertion or deletion which is | |
409 | used in scrolling lines. An insert means that the value of i | |
410 | has increased without a corresponding increase in the value | |
411 | of j. A delete means that the value of j has increased | |
412 | without a corresponding increase in the value of i. A write | |
413 | means that i and j are both increased by the same amount, and | |
414 | that the old lines will be moved to their new positions. | |
415 | ||
416 | An insert following a delete is allowed only if i > j. | |
417 | A delete following an insert is allowed only if i < j. | |
418 | These restrictions ensure that the new lines in an insert | |
419 | will always be blank as an effect of the neighboring writes. | |
420 | Thus the calculated cost of an insert is simply the cost of | |
421 | outputting the new line contents. The direct cost of a | |
422 | delete is zero. Inserts and deletes indirectly affect the | |
423 | total cost through their influence on subsequent writes. */ | |
424 | ||
425 | /* The vectors draw_cost, old_hash, and new_hash have the same | |
426 | meanings here as in calculate_scrolling, and old_draw_cost | |
427 | is the equivalent of draw_cost for the old line contents */ | |
428 | ||
429 | static void | |
430 | calculate_direct_scrolling (frame, matrix, window_size, lines_below, | |
431 | draw_cost, old_draw_cost, old_hash, new_hash, | |
432 | free_at_end) | |
433 | FRAME_PTR frame; | |
434 | /* matrix is of size window_size + 1 on each side. */ | |
435 | struct matrix_elt *matrix; | |
436 | int window_size; | |
437 | int *draw_cost; | |
438 | int *old_draw_cost; | |
439 | int *old_hash; | |
440 | int *new_hash; | |
441 | int free_at_end; | |
442 | { | |
443 | register int i, j; | |
444 | int frame_height = FRAME_HEIGHT (frame); | |
445 | register struct matrix_elt *p, *p1; | |
446 | register int cost, cost1, delta; | |
447 | ||
448 | /* first_insert_cost[-I] is the cost of doing the first insert-line | |
449 | at a position I lines above the bottom line in the scroll window. */ | |
450 | int *first_insert_cost | |
451 | = &FRAME_INSERT_COST (frame)[frame_height - 1]; | |
452 | int *first_delete_cost | |
453 | = &FRAME_DELETE_COST (frame)[frame_height - 1]; | |
454 | int *next_insert_cost | |
455 | = &FRAME_INSERTN_COST (frame)[frame_height - 1]; | |
456 | int *next_delete_cost | |
457 | = &FRAME_DELETEN_COST (frame)[frame_height - 1]; | |
458 | ||
459 | int scroll_overhead; | |
460 | ||
461 | /* Discourage long scrolls on fast lines. | |
462 | Don't scroll nearly a full frame height unless it saves | |
463 | at least 1/4 second. */ | |
464 | int extra_cost = baud_rate / (10 * 4 * FRAME_HEIGHT (frame)); | |
465 | ||
466 | if (baud_rate <= 0) | |
467 | extra_cost = 1; | |
468 | ||
469 | /* Overhead of setting the scroll window, plus the extra cost | |
470 | cost of scrolling by a distance of one. The extra cost is | |
471 | added once for consistency with the cost vectors */ | |
472 | scroll_overhead = scroll_region_cost + extra_cost; | |
473 | ||
474 | /* initialize the top left corner of the matrix */ | |
475 | matrix->writecost = 0; | |
476 | matrix->insertcost = INFINITY; | |
477 | matrix->deletecost = INFINITY; | |
478 | matrix->writecount = 0; | |
479 | matrix->insertcount = 0; | |
480 | matrix->deletecount = 0; | |
481 | ||
482 | /* initialize the left edge of the matrix */ | |
483 | cost = 0; | |
484 | for (i = 1; i <= window_size; i++) | |
485 | { | |
486 | p = matrix + i * (window_size + 1); | |
487 | cost += draw_cost[i]; | |
488 | p->insertcost = cost; | |
489 | p->writecost = INFINITY; | |
490 | p->deletecost = INFINITY; | |
491 | p->insertcount = i; | |
492 | p->writecount = 0; | |
493 | p->deletecount = 0; | |
494 | } | |
495 | ||
496 | /* initialize the top edge of the matrix */ | |
497 | for (j = 1; j <= window_size; j++) | |
498 | { | |
499 | matrix[j].deletecost = 0; | |
500 | matrix[j].writecost = INFINITY; | |
501 | matrix[j].insertcost = INFINITY; | |
502 | matrix[j].deletecount = j; | |
503 | matrix[j].writecount = 0; | |
504 | matrix[j].insertcount = 0; | |
505 | } | |
506 | ||
507 | /* `i' represents the vpos among new frame contents. | |
508 | `j' represents the vpos among the old frame contents. */ | |
509 | p = matrix + window_size + 2; /* matrix [1, 1] */ | |
510 | ||
511 | for (i = 1; i <= window_size; i++, p++) | |
512 | for (j = 1; j <= window_size; j++, p++) | |
513 | { | |
514 | /* p contains the address of matrix [i, j] */ | |
515 | ||
516 | /* First calculate the cost assuming we do | |
517 | not insert or delete above this line. | |
518 | That is, if we update through line i-1 | |
519 | based on old lines through j-1, | |
520 | and then just change old line j to new line i. | |
521 | ||
522 | Depending on which choice gives the lower cost, | |
523 | this usually involves either scrolling a single line | |
524 | or extending a sequence of scrolled lines, but | |
525 | when i == j, no scrolling is required. */ | |
526 | p1 = p - window_size - 2; /* matrix [i-1, j-1] */ | |
527 | cost = p1->insertcost; | |
528 | if (cost > p1->deletecost) | |
529 | cost = p1->deletecost; | |
530 | cost1 = p1->writecost; | |
531 | if (i == j) | |
532 | { | |
533 | if (cost > cost1) | |
534 | { | |
535 | cost = cost1; | |
536 | p->writecount = p1->writecount + 1; | |
537 | } | |
538 | else | |
539 | p->writecount = 1; | |
540 | if (old_hash[j] != new_hash[i]) | |
541 | { | |
542 | cost += draw_cost[i]; | |
543 | } | |
544 | } | |
545 | else | |
546 | { | |
547 | if (i > j) | |
548 | { | |
549 | delta = i - j; | |
550 | ||
551 | /* The cost added here for scrolling the first line by | |
552 | a distance N includes the overhead of setting the | |
553 | scroll window, the cost of inserting N lines at a | |
554 | position N lines above the bottom line of the window, | |
555 | and an extra cost which is proportional to N. */ | |
556 | cost += scroll_overhead + first_insert_cost[-delta] + | |
557 | (delta-1) * (next_insert_cost[-delta] + extra_cost); | |
558 | ||
559 | /* In the most general case, the insertion overhead and | |
560 | the multiply factor can grow linearly as the distance | |
561 | from the bottom of the window increases. The incremental | |
562 | cost of scrolling an additional line depends upon the | |
563 | rate of change of these two parameters. Each of these | |
564 | growth rates can be determined by a simple difference. | |
565 | To reduce the cumulative effects of rounding error, we | |
566 | vary the position at which the difference is computed. */ | |
567 | cost1 += first_insert_cost[-j] - first_insert_cost[1-j] + | |
568 | (delta-1) * (next_insert_cost[-j] - next_insert_cost[1-j]); | |
569 | } | |
570 | else | |
571 | { | |
572 | delta = j - i; | |
573 | cost += scroll_overhead + first_delete_cost[-delta] + | |
574 | (delta-1) * (next_delete_cost[-delta] + extra_cost); | |
575 | cost1 += first_delete_cost[-i] - first_delete_cost[1-i] + | |
576 | (delta-1) * ( next_delete_cost[-i] - next_delete_cost[1-i]); | |
577 | } | |
578 | if (cost1 < cost) | |
579 | { | |
580 | cost = cost1; | |
581 | p->writecount = p1->writecount + 1; | |
582 | } | |
583 | else | |
584 | p->writecount = 1; | |
585 | if (old_hash[j] != new_hash[i]) | |
586 | { | |
587 | cost += draw_cost[i] + old_draw_cost[j]; | |
588 | } | |
589 | } | |
590 | p->writecost = cost; | |
591 | ||
592 | /* Calculate the cost if we do an insert-line | |
593 | before outputting this line. | |
594 | That is, we update through line i-1 | |
595 | based on old lines through j, | |
596 | do an insert-line on line i, | |
597 | and then output line i from scratch, | |
598 | leaving old lines starting from j for reuse below. */ | |
599 | p1 = p - window_size - 1; /* matrix [i-1, j] */ | |
600 | cost = p1->writecost; | |
601 | /* If i > j, an insert is allowed after a delete. */ | |
602 | if (i > j && p1->deletecost < cost) | |
603 | cost = p1->deletecost; | |
604 | if (p1->insertcost <= cost) | |
605 | { | |
606 | cost = p1->insertcost; | |
607 | p->insertcount = p1->insertcount + 1; | |
608 | } | |
609 | else | |
610 | p->insertcount = 1; | |
611 | cost += draw_cost[i]; | |
612 | p->insertcost = cost; | |
613 | ||
614 | /* Calculate the cost if we do a delete line after | |
615 | outputting this line. | |
616 | That is, we update through line i | |
617 | based on old lines through j-1, | |
618 | and throw away old line j. */ | |
619 | p1 = p - 1; /* matrix [i, j-1] */ | |
620 | cost = p1->writecost; | |
621 | /* If i < j, a delete is allowed after an insert. */ | |
622 | if (i < j && p1->insertcost < cost) | |
623 | cost = p1->insertcost; | |
624 | cost1 = p1->deletecost; | |
625 | if (p1->deletecost <= cost) | |
626 | { | |
627 | cost = p1->deletecost; | |
628 | p->deletecount = p1->deletecount + 1; | |
629 | } | |
630 | else | |
631 | p->deletecount = 1; | |
632 | p->deletecost = cost; | |
633 | } | |
634 | } | |
89700111 GM |
635 | |
636 | ||
1af1b1e8 | 637 | \f |
89700111 GM |
638 | /* Perform insert-lines and delete-lines operations on CURRENT_MATRIX |
639 | according to the costs in MATRIX, using the direct scrolling method | |
640 | which is used when the terminal supports setting a scroll window | |
641 | (scroll_region_ok). | |
1af1b1e8 RS |
642 | |
643 | WINDOW_SIZE is the number of lines being considered for scrolling | |
89700111 GM |
644 | and UNCHANGED_AT_TOP is the vpos of the first line being |
645 | considered. These two arguments can specify any contiguous range | |
646 | of lines. | |
1af1b1e8 | 647 | |
1af1b1e8 RS |
648 | In the direct scrolling method, a new scroll window is selected |
649 | before each insertion or deletion, so that groups of lines can be | |
650 | scrolled directly to their final vertical positions. This method | |
89700111 GM |
651 | is described in more detail in calculate_direct_scrolling, where |
652 | the cost matrix for this approach is constructed. */ | |
1af1b1e8 RS |
653 | |
654 | static void | |
89700111 GM |
655 | do_direct_scrolling (current_matrix, cost_matrix, window_size, |
656 | unchanged_at_top) | |
657 | struct glyph_matrix *current_matrix; | |
658 | struct matrix_elt *cost_matrix; | |
1af1b1e8 RS |
659 | int window_size; |
660 | int unchanged_at_top; | |
661 | { | |
89700111 GM |
662 | struct matrix_elt *p; |
663 | int i, j; | |
1af1b1e8 | 664 | |
89700111 GM |
665 | /* A queue of deletions and insertions to be performed. */ |
666 | struct alt_queue { int count, pos, window; }; | |
667 | struct alt_queue *queue_start = (struct alt_queue *) | |
668 | alloca (window_size * sizeof *queue_start); | |
669 | struct alt_queue *queue = queue_start; | |
1af1b1e8 | 670 | |
89700111 GM |
671 | /* Set to 1 if a terminal window has been set with |
672 | set_terminal_window: */ | |
673 | int terminal_window_p = 0; | |
1af1b1e8 | 674 | |
89700111 GM |
675 | /* A nonzero value of write_follows indicates that a write has been |
676 | selected, allowing either an insert or a delete to be selected | |
677 | next. When write_follows is zero, a delete cannot be selected | |
678 | unless j < i, and an insert cannot be selected unless i < j. | |
679 | This corresponds to a similar restriction (with the ordering | |
680 | reversed) in calculate_direct_scrolling, which is intended to | |
681 | ensure that lines marked as inserted will be blank. */ | |
682 | int write_follows_p = 1; | |
683 | ||
684 | /* For each row in the new matrix what row of the old matrix it is. */ | |
685 | int *copy_from = (int *) alloca (window_size * sizeof (int)); | |
686 | ||
687 | /* Non-zero for each row in the new matrix that is retained from the | |
688 | old matrix. Lines not retained are empty. */ | |
689 | char *retained_p = (char *) alloca (window_size * sizeof (char)); | |
690 | ||
691 | bzero (retained_p, window_size * sizeof (char)); | |
692 | ||
693 | /* Perform some sanity checks when GLYPH_DEBUG is on. */ | |
694 | CHECK_MATRIX (current_matrix); | |
695 | ||
696 | /* We are working on the line range UNCHANGED_AT_TOP ... | |
697 | UNCHANGED_AT_TOP + WINDOW_SIZE (not including) in CURRENT_MATRIX. | |
698 | We step through lines in this range from the end to the start. I | |
699 | is an index into new lines, j an index into old lines. The cost | |
700 | matrix determines what to do for ranges of indices. | |
701 | ||
702 | If i is decremented without also decrementing j, this corresponds | |
703 | to inserting empty lines in the result. If j is decremented | |
704 | without also decrementing i, this corresponds to omitting these | |
705 | lines in the new rows, i.e. rows are deleted. */ | |
706 | i = j = window_size; | |
707 | ||
1af1b1e8 RS |
708 | while (i > 0 || j > 0) |
709 | { | |
89700111 GM |
710 | p = cost_matrix + i * (window_size + 1) + j; |
711 | ||
712 | if (p->insertcost < p->writecost | |
713 | && p->insertcost < p->deletecost | |
714 | && (write_follows_p || i < j)) | |
1af1b1e8 | 715 | { |
89700111 GM |
716 | /* Insert is cheaper than deleting or writing lines. Leave |
717 | a hole in the result display that will be filled with | |
718 | empty lines when the queue is emptied. */ | |
719 | queue->count = 0; | |
720 | queue->window = i; | |
721 | queue->pos = i - p->insertcount; | |
722 | ++queue; | |
723 | ||
1af1b1e8 | 724 | i -= p->insertcount; |
89700111 | 725 | write_follows_p = 0; |
1af1b1e8 | 726 | } |
89700111 GM |
727 | else if (p->deletecost < p->writecost |
728 | && (write_follows_p || i > j)) | |
1af1b1e8 | 729 | { |
89700111 GM |
730 | /* Deleting lines is cheaper. By decrementing J, omit |
731 | deletecount lines from the original. */ | |
732 | write_follows_p = 0; | |
1af1b1e8 RS |
733 | j -= p->deletecount; |
734 | } | |
735 | else | |
736 | { | |
89700111 GM |
737 | /* One or more lines should be written. In the direct |
738 | scrolling method we do this by scrolling the lines to the | |
739 | place they belong. */ | |
740 | int n_to_write = p->writecount; | |
741 | write_follows_p = 1; | |
742 | xassert (n_to_write > 0); | |
743 | ||
1af1b1e8 RS |
744 | if (i > j) |
745 | { | |
89700111 | 746 | /* Immediately insert lines */ |
1af1b1e8 | 747 | set_terminal_window (i + unchanged_at_top); |
89700111 GM |
748 | terminal_window_p = 1; |
749 | ins_del_lines (j - n_to_write + unchanged_at_top, i - j); | |
1af1b1e8 RS |
750 | } |
751 | else if (i < j) | |
752 | { | |
89700111 GM |
753 | /* Queue the deletion of a group of lines */ |
754 | queue->pos = i - n_to_write + unchanged_at_top; | |
755 | queue->window = j + unchanged_at_top; | |
756 | queue->count = i - j; | |
757 | ++queue; | |
1af1b1e8 RS |
758 | } |
759 | ||
89700111 | 760 | while (n_to_write > 0) |
1af1b1e8 | 761 | { |
89700111 GM |
762 | --i, --j, --n_to_write; |
763 | copy_from[i] = j; | |
764 | retained_p[j] = 1; | |
1af1b1e8 RS |
765 | } |
766 | } | |
767 | } | |
768 | ||
89700111 GM |
769 | /* Do queued operations. */ |
770 | if (queue > queue_start) | |
1af1b1e8 | 771 | { |
89700111 GM |
772 | int next = -1; |
773 | ||
774 | do | |
1af1b1e8 | 775 | { |
89700111 GM |
776 | --queue; |
777 | if (queue->count) | |
778 | { | |
779 | set_terminal_window (queue->window); | |
780 | terminal_window_p = 1; | |
781 | ins_del_lines (queue->pos, queue->count); | |
782 | } | |
783 | else | |
1af1b1e8 | 784 | { |
89700111 GM |
785 | for (j = queue->window - 1; j >= queue->pos; --j) |
786 | { | |
787 | while (retained_p[++next]) | |
788 | ; | |
789 | copy_from[j] = next; | |
790 | } | |
1af1b1e8 RS |
791 | } |
792 | } | |
89700111 | 793 | while (queue > queue_start); |
1af1b1e8 RS |
794 | } |
795 | ||
89700111 GM |
796 | /* Now, for each row I in the range of rows we are working on, |
797 | copy_from[i] gives the original line to copy to I, and | |
798 | retained_p[copy_from[i]] is zero if line I in the new display is | |
799 | empty. */ | |
800 | mirrored_line_dance (current_matrix, unchanged_at_top, window_size, | |
801 | copy_from, retained_p); | |
802 | ||
803 | if (terminal_window_p) | |
1af1b1e8 RS |
804 | set_terminal_window (0); |
805 | } | |
89700111 GM |
806 | |
807 | ||
1af1b1e8 | 808 | \f |
632a8dd6 | 809 | void |
0137dbf7 | 810 | scrolling_1 (frame, window_size, unchanged_at_top, unchanged_at_bottom, |
1af1b1e8 | 811 | draw_cost, old_draw_cost, old_hash, new_hash, free_at_end) |
0137dbf7 | 812 | FRAME_PTR frame; |
632a8dd6 JB |
813 | int window_size, unchanged_at_top, unchanged_at_bottom; |
814 | int *draw_cost; | |
1af1b1e8 | 815 | int *old_draw_cost; |
632a8dd6 JB |
816 | int *old_hash; |
817 | int *new_hash; | |
818 | int free_at_end; | |
819 | { | |
820 | struct matrix_elt *matrix; | |
821 | matrix = ((struct matrix_elt *) | |
822 | alloca ((window_size + 1) * (window_size + 1) * sizeof *matrix)); | |
823 | ||
1af1b1e8 RS |
824 | if (scroll_region_ok) |
825 | { | |
826 | calculate_direct_scrolling (frame, matrix, window_size, | |
827 | unchanged_at_bottom, | |
828 | draw_cost, old_draw_cost, | |
829 | old_hash, new_hash, free_at_end); | |
89700111 GM |
830 | do_direct_scrolling (frame->current_matrix, |
831 | matrix, window_size, unchanged_at_top); | |
1af1b1e8 RS |
832 | } |
833 | else | |
834 | { | |
835 | calculate_scrolling (frame, matrix, window_size, unchanged_at_bottom, | |
836 | draw_cost, old_hash, new_hash, | |
837 | free_at_end); | |
89700111 GM |
838 | do_scrolling (frame->current_matrix, matrix, window_size, |
839 | unchanged_at_top); | |
1af1b1e8 | 840 | } |
632a8dd6 | 841 | } |
89700111 GM |
842 | |
843 | ||
632a8dd6 | 844 | \f |
89700111 GM |
845 | /* Return number of lines in common between current and desired frame |
846 | contents described to us only as vectors of hash codes OLDHASH and | |
847 | NEWHASH. Consider only vpos range START to END (not including | |
848 | END). Ignore short lines on the assumption that avoiding redrawing | |
849 | such a line will have little weight. */ | |
632a8dd6 JB |
850 | |
851 | int | |
852 | scrolling_max_lines_saved (start, end, oldhash, newhash, cost) | |
853 | int start, end; | |
854 | int *oldhash, *newhash, *cost; | |
855 | { | |
856 | struct { int hash; int count; } lines[01000]; | |
857 | register int i, h; | |
858 | register int matchcount = 0; | |
859 | int avg_length = 0; | |
860 | int threshold; | |
861 | ||
862 | /* Compute a threshold which is 1/4 of average length of these lines. */ | |
863 | ||
864 | for (i = start; i < end; i++) | |
865 | avg_length += cost[i]; | |
866 | ||
867 | avg_length /= end - start; | |
868 | threshold = avg_length / 4; | |
869 | ||
870 | bzero (lines, sizeof lines); | |
871 | ||
89700111 GM |
872 | /* Put new lines' hash codes in hash table. Ignore lines shorter |
873 | than the threshold. Thus, if the lines that are in common are | |
874 | mainly the ones that are short, they won't count. */ | |
632a8dd6 JB |
875 | for (i = start; i < end; i++) |
876 | { | |
877 | if (cost[i] > threshold) | |
878 | { | |
879 | h = newhash[i] & 0777; | |
880 | lines[h].hash = newhash[i]; | |
881 | lines[h].count++; | |
882 | } | |
883 | } | |
884 | ||
89700111 GM |
885 | /* Look up old line hash codes in the hash table. Count number of |
886 | matches between old lines and new. */ | |
632a8dd6 JB |
887 | for (i = start; i < end; i++) |
888 | { | |
889 | h = oldhash[i] & 0777; | |
890 | if (oldhash[i] == lines[h].hash) | |
891 | { | |
892 | matchcount++; | |
893 | if (--lines[h].count == 0) | |
894 | lines[h].hash = 0; | |
895 | } | |
896 | } | |
897 | ||
898 | return matchcount; | |
899 | } | |
900 | \f | |
89700111 GM |
901 | /* Return a measure of the cost of moving the lines starting with vpos |
902 | FROM, up to but not including vpos TO, down by AMOUNT lines (AMOUNT | |
903 | may be negative). These are the same arguments that might be given | |
904 | to scroll_frame_lines to perform this scrolling. */ | |
632a8dd6 | 905 | |
dfcf069d | 906 | int |
0137dbf7 JB |
907 | scroll_cost (frame, from, to, amount) |
908 | FRAME_PTR frame; | |
632a8dd6 JB |
909 | int from, to, amount; |
910 | { | |
0137dbf7 | 911 | /* Compute how many lines, at bottom of frame, |
632a8dd6 JB |
912 | will not be involved in actual motion. */ |
913 | int limit = to; | |
914 | int offset; | |
0137dbf7 | 915 | int height = FRAME_HEIGHT (frame); |
632a8dd6 | 916 | |
632a8dd6 JB |
917 | if (amount == 0) |
918 | return 0; | |
919 | ||
3e2bea7c JB |
920 | if (! scroll_region_ok) |
921 | limit = height; | |
922 | else if (amount > 0) | |
923 | limit += amount; | |
924 | ||
632a8dd6 JB |
925 | if (amount < 0) |
926 | { | |
927 | int temp = to; | |
928 | to = from + amount; | |
929 | from = temp + amount; | |
930 | amount = - amount; | |
931 | } | |
932 | ||
933 | offset = height - limit; | |
934 | ||
935 | return | |
0137dbf7 JB |
936 | (FRAME_INSERT_COST (frame)[offset + from] |
937 | + (amount - 1) * FRAME_INSERTN_COST (frame)[offset + from] | |
00eb4c4a RS |
938 | + FRAME_DELETE_COST (frame)[offset + to] |
939 | + (amount - 1) * FRAME_DELETEN_COST (frame)[offset + to]); | |
632a8dd6 JB |
940 | } |
941 | \f | |
942 | /* Calculate the line insertion/deletion | |
943 | overhead and multiply factor values */ | |
944 | ||
945 | static void | |
0137dbf7 JB |
946 | line_ins_del (frame, ov1, pf1, ovn, pfn, ov, mf) |
947 | FRAME_PTR frame; | |
632a8dd6 JB |
948 | int ov1, ovn; |
949 | int pf1, pfn; | |
950 | register int *ov, *mf; | |
951 | { | |
952 | register int i; | |
0137dbf7 | 953 | register int frame_height = FRAME_HEIGHT (frame); |
632a8dd6 JB |
954 | register int insert_overhead = ov1 * 10; |
955 | register int next_insert_cost = ovn * 10; | |
956 | ||
0137dbf7 | 957 | for (i = frame_height-1; i >= 0; i--) |
632a8dd6 | 958 | { |
326e0cf8 | 959 | mf[i] = next_insert_cost / 10; |
632a8dd6 | 960 | next_insert_cost += pfn; |
326e0cf8 | 961 | ov[i] = (insert_overhead + next_insert_cost) / 10; |
632a8dd6 JB |
962 | insert_overhead += pf1; |
963 | } | |
964 | } | |
965 | ||
966 | static void | |
0137dbf7 | 967 | ins_del_costs (frame, |
632a8dd6 JB |
968 | one_line_string, multi_string, |
969 | setup_string, cleanup_string, | |
970 | costvec, ncostvec, coefficient) | |
0137dbf7 | 971 | FRAME_PTR frame; |
632a8dd6 JB |
972 | char *one_line_string, *multi_string; |
973 | char *setup_string, *cleanup_string; | |
974 | int *costvec, *ncostvec; | |
975 | int coefficient; | |
976 | { | |
977 | if (multi_string) | |
0137dbf7 | 978 | line_ins_del (frame, |
632a8dd6 JB |
979 | string_cost (multi_string) * coefficient, |
980 | per_line_cost (multi_string) * coefficient, | |
981 | 0, 0, costvec, ncostvec); | |
982 | else if (one_line_string) | |
0137dbf7 | 983 | line_ins_del (frame, |
632a8dd6 JB |
984 | string_cost (setup_string) + string_cost (cleanup_string), 0, |
985 | string_cost (one_line_string), | |
986 | per_line_cost (one_line_string), | |
987 | costvec, ncostvec); | |
988 | else | |
0137dbf7 | 989 | line_ins_del (frame, |
632a8dd6 JB |
990 | 9999, 0, 9999, 0, |
991 | costvec, ncostvec); | |
992 | } | |
993 | ||
994 | /* Calculate the insert and delete line costs. | |
995 | Note that this is done even when running with a window system | |
996 | because we want to know how long scrolling takes (and avoid it). | |
0137dbf7 | 997 | This must be redone whenever the frame height changes. |
632a8dd6 JB |
998 | |
999 | We keep the ID costs in a precomputed array based on the position | |
1000 | at which the I or D is performed. Also, there are two kinds of ID | |
1001 | costs: the "once-only" and the "repeated". This is to handle both | |
1002 | those terminals that are able to insert N lines at a time (once- | |
1003 | only) and those that must repeatedly insert one line. | |
1004 | ||
1005 | The cost to insert N lines at line L is | |
0137dbf7 JB |
1006 | [tt.t_ILov + (frame_height + 1 - L) * tt.t_ILpf] + |
1007 | N * [tt.t_ILnov + (frame_height + 1 - L) * tt.t_ILnpf] | |
632a8dd6 JB |
1008 | |
1009 | ILov represents the basic insert line overhead. ILpf is the padding | |
1010 | required to allow the terminal time to move a line: insertion at line | |
0137dbf7 | 1011 | L changes (frame_height + 1 - L) lines. |
632a8dd6 JB |
1012 | |
1013 | The first bracketed expression above is the overhead; the second is | |
1014 | the multiply factor. Both are dependent only on the position at | |
1015 | which the insert is performed. We store the overhead in | |
0137dbf7 JB |
1016 | FRAME_INSERT_COST (frame) and the multiply factor in |
1017 | FRAME_INSERTN_COST (frame). Note however that any insertion | |
632a8dd6 | 1018 | must include at least one multiply factor. Rather than compute this |
0137dbf7 JB |
1019 | as FRAME_INSERT_COST (frame)[line]+FRAME_INSERTN_COST (frame)[line], |
1020 | we add FRAME_INSERTN_COST (frame) into FRAME_INSERT_COST (frame). | |
632a8dd6 JB |
1021 | This is reasonable because of the particular algorithm used in calcM. |
1022 | ||
1023 | Deletion is essentially the same as insertion. | |
1024 | */ | |
1025 | ||
dfcf069d | 1026 | void |
0137dbf7 | 1027 | do_line_insertion_deletion_costs (frame, |
632a8dd6 JB |
1028 | ins_line_string, multi_ins_string, |
1029 | del_line_string, multi_del_string, | |
1030 | setup_string, cleanup_string, coefficient) | |
0137dbf7 | 1031 | FRAME_PTR frame; |
632a8dd6 JB |
1032 | char *ins_line_string, *multi_ins_string; |
1033 | char *del_line_string, *multi_del_string; | |
1034 | char *setup_string, *cleanup_string; | |
1035 | int coefficient; | |
1036 | { | |
0137dbf7 | 1037 | if (FRAME_INSERT_COST (frame) != 0) |
632a8dd6 | 1038 | { |
0137dbf7 JB |
1039 | FRAME_INSERT_COST (frame) = |
1040 | (int *) xrealloc (FRAME_INSERT_COST (frame), | |
1041 | FRAME_HEIGHT (frame) * sizeof (int)); | |
1042 | FRAME_DELETEN_COST (frame) = | |
1043 | (int *) xrealloc (FRAME_DELETEN_COST (frame), | |
1044 | FRAME_HEIGHT (frame) * sizeof (int)); | |
1045 | FRAME_INSERTN_COST (frame) = | |
1046 | (int *) xrealloc (FRAME_INSERTN_COST (frame), | |
1047 | FRAME_HEIGHT (frame) * sizeof (int)); | |
1048 | FRAME_DELETE_COST (frame) = | |
1049 | (int *) xrealloc (FRAME_DELETE_COST (frame), | |
1050 | FRAME_HEIGHT (frame) * sizeof (int)); | |
632a8dd6 JB |
1051 | } |
1052 | else | |
1053 | { | |
0137dbf7 JB |
1054 | FRAME_INSERT_COST (frame) = |
1055 | (int *) xmalloc (FRAME_HEIGHT (frame) * sizeof (int)); | |
1056 | FRAME_DELETEN_COST (frame) = | |
1057 | (int *) xmalloc (FRAME_HEIGHT (frame) * sizeof (int)); | |
1058 | FRAME_INSERTN_COST (frame) = | |
1059 | (int *) xmalloc (FRAME_HEIGHT (frame) * sizeof (int)); | |
1060 | FRAME_DELETE_COST (frame) = | |
1061 | (int *) xmalloc (FRAME_HEIGHT (frame) * sizeof (int)); | |
632a8dd6 JB |
1062 | } |
1063 | ||
0137dbf7 | 1064 | ins_del_costs (frame, |
632a8dd6 JB |
1065 | ins_line_string, multi_ins_string, |
1066 | setup_string, cleanup_string, | |
0137dbf7 | 1067 | FRAME_INSERT_COST (frame), FRAME_INSERTN_COST (frame), |
632a8dd6 | 1068 | coefficient); |
0137dbf7 | 1069 | ins_del_costs (frame, |
632a8dd6 JB |
1070 | del_line_string, multi_del_string, |
1071 | setup_string, cleanup_string, | |
fd374ddc | 1072 | FRAME_DELETE_COST (frame), FRAME_DELETEN_COST (frame), |
632a8dd6 JB |
1073 | coefficient); |
1074 | } |