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comparison src/libvterm/src/termscreen.c @ 14734:2c72fa16aa70 v8.1.0379

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patch 8.1.0379: build dependencies are incomplete commit https://github.com/vim/vim/commit/78dcd4f002c41fff9c15434336f57210edc384f2 Author: Bram Moolenaar <Bram@vim.org> Date: Thu Sep 13 17:23:28 2018 +0200 patch 8.1.0379: build dependencies are incomplete Problem: Build dependencies are incomplete. Solution: Update the build dependencies, mainly for xdiff. Adjust object directory for libvterm and xdiff.
author Christian Brabandt <cb@256bit.org>
date Thu, 13 Sep 2018 17:30:05 +0200
parents
children 544490b69e1d
comparison
equal deleted inserted replaced
14733:15d60eacdbc8 14734:2c72fa16aa70
1 #include "vterm_internal.h"
2
3 #include <stdio.h>
4 #include <string.h>
5
6 #include "rect.h"
7 #include "utf8.h"
8
9 #define UNICODE_SPACE 0x20
10 #define UNICODE_LINEFEED 0x0a
11
12 /* State of the pen at some moment in time, also used in a cell */
13 typedef struct
14 {
15 /* After the bitfield */
16 VTermColor fg, bg;
17
18 unsigned int bold : 1;
19 unsigned int underline : 2;
20 unsigned int italic : 1;
21 unsigned int blink : 1;
22 unsigned int reverse : 1;
23 unsigned int strike : 1;
24 unsigned int font : 4; /* 0 to 9 */
25
26 /* Extra state storage that isn't strictly pen-related */
27 unsigned int protected_cell : 1;
28 unsigned int dwl : 1; /* on a DECDWL or DECDHL line */
29 unsigned int dhl : 2; /* on a DECDHL line (1=top 2=bottom) */
30 } ScreenPen;
31
32 /* Internal representation of a screen cell */
33 typedef struct
34 {
35 uint32_t chars[VTERM_MAX_CHARS_PER_CELL];
36 ScreenPen pen;
37 } ScreenCell;
38
39 static int vterm_screen_set_cell(VTermScreen *screen, VTermPos pos, const VTermScreenCell *cell);
40
41 struct VTermScreen
42 {
43 VTerm *vt;
44 VTermState *state;
45
46 const VTermScreenCallbacks *callbacks;
47 void *cbdata;
48
49 VTermDamageSize damage_merge;
50 /* start_row == -1 => no damage */
51 VTermRect damaged;
52 VTermRect pending_scrollrect;
53 int pending_scroll_downward, pending_scroll_rightward;
54
55 int rows;
56 int cols;
57 int global_reverse;
58
59 /* Primary and Altscreen. buffers[1] is lazily allocated as needed */
60 ScreenCell *buffers[2];
61
62 /* buffer will == buffers[0] or buffers[1], depending on altscreen */
63 ScreenCell *buffer;
64
65 /* buffer for a single screen row used in scrollback storage callbacks */
66 VTermScreenCell *sb_buffer;
67
68 ScreenPen pen;
69 };
70
71 static ScreenCell *getcell(const VTermScreen *screen, int row, int col)
72 {
73 if(row < 0 || row >= screen->rows)
74 return NULL;
75 if(col < 0 || col >= screen->cols)
76 return NULL;
77 return screen->buffer + (screen->cols * row) + col;
78 }
79
80 static ScreenCell *realloc_buffer(VTermScreen *screen, ScreenCell *buffer, int new_rows, int new_cols)
81 {
82 ScreenCell *new_buffer = vterm_allocator_malloc(screen->vt, sizeof(ScreenCell) * new_rows * new_cols);
83 int row, col;
84
85 for(row = 0; row < new_rows; row++) {
86 for(col = 0; col < new_cols; col++) {
87 ScreenCell *new_cell = new_buffer + row*new_cols + col;
88
89 if(buffer && row < screen->rows && col < screen->cols)
90 *new_cell = buffer[row * screen->cols + col];
91 else {
92 new_cell->chars[0] = 0;
93 new_cell->pen = screen->pen;
94 }
95 }
96 }
97
98 if(buffer)
99 vterm_allocator_free(screen->vt, buffer);
100
101 return new_buffer;
102 }
103
104 static void damagerect(VTermScreen *screen, VTermRect rect)
105 {
106 VTermRect emit;
107
108 switch(screen->damage_merge) {
109 case VTERM_DAMAGE_CELL:
110 /* Always emit damage event */
111 emit = rect;
112 break;
113
114 case VTERM_DAMAGE_ROW:
115 /* Emit damage longer than one row. Try to merge with existing damage in
116 * the same row */
117 if(rect.end_row > rect.start_row + 1) {
118 // Bigger than 1 line - flush existing, emit this
119 vterm_screen_flush_damage(screen);
120 emit = rect;
121 }
122 else if(screen->damaged.start_row == -1) {
123 // None stored yet
124 screen->damaged = rect;
125 return;
126 }
127 else if(rect.start_row == screen->damaged.start_row) {
128 // Merge with the stored line
129 if(screen->damaged.start_col > rect.start_col)
130 screen->damaged.start_col = rect.start_col;
131 if(screen->damaged.end_col < rect.end_col)
132 screen->damaged.end_col = rect.end_col;
133 return;
134 }
135 else {
136 // Emit the currently stored line, store a new one
137 emit = screen->damaged;
138 screen->damaged = rect;
139 }
140 break;
141
142 case VTERM_DAMAGE_SCREEN:
143 case VTERM_DAMAGE_SCROLL:
144 /* Never emit damage event */
145 if(screen->damaged.start_row == -1)
146 screen->damaged = rect;
147 else {
148 rect_expand(&screen->damaged, &rect);
149 }
150 return;
151
152 default:
153 DEBUG_LOG1("TODO: Maybe merge damage for level %d\n", screen->damage_merge);
154 return;
155 }
156
157 if(screen->callbacks && screen->callbacks->damage)
158 (*screen->callbacks->damage)(emit, screen->cbdata);
159 }
160
161 static void damagescreen(VTermScreen *screen)
162 {
163 VTermRect rect = {0,0,0,0};
164 rect.end_row = screen->rows;
165 rect.end_col = screen->cols;
166
167 damagerect(screen, rect);
168 }
169
170 static int putglyph(VTermGlyphInfo *info, VTermPos pos, void *user)
171 {
172 int i;
173 int col;
174 VTermRect rect;
175
176 VTermScreen *screen = user;
177 ScreenCell *cell = getcell(screen, pos.row, pos.col);
178
179 if(!cell)
180 return 0;
181
182 for(i = 0; i < VTERM_MAX_CHARS_PER_CELL && info->chars[i]; i++) {
183 cell->chars[i] = info->chars[i];
184 cell->pen = screen->pen;
185 }
186 if(i < VTERM_MAX_CHARS_PER_CELL)
187 cell->chars[i] = 0;
188
189 for(col = 1; col < info->width; col++)
190 getcell(screen, pos.row, pos.col + col)->chars[0] = (uint32_t)-1;
191
192 rect.start_row = pos.row;
193 rect.end_row = pos.row+1;
194 rect.start_col = pos.col;
195 rect.end_col = pos.col+info->width;
196
197 cell->pen.protected_cell = info->protected_cell;
198 cell->pen.dwl = info->dwl;
199 cell->pen.dhl = info->dhl;
200
201 damagerect(screen, rect);
202
203 return 1;
204 }
205
206 static int moverect_internal(VTermRect dest, VTermRect src, void *user)
207 {
208 VTermScreen *screen = user;
209
210 if(screen->callbacks && screen->callbacks->sb_pushline &&
211 dest.start_row == 0 && dest.start_col == 0 && // starts top-left corner
212 dest.end_col == screen->cols && // full width
213 screen->buffer == screen->buffers[0]) { // not altscreen
214 VTermPos pos;
215 for(pos.row = 0; pos.row < src.start_row; pos.row++) {
216 for(pos.col = 0; pos.col < screen->cols; pos.col++)
217 (void)vterm_screen_get_cell(screen, pos, screen->sb_buffer + pos.col);
218
219 (screen->callbacks->sb_pushline)(screen->cols, screen->sb_buffer, screen->cbdata);
220 }
221 }
222
223 {
224 int cols = src.end_col - src.start_col;
225 int downward = src.start_row - dest.start_row;
226 int init_row, test_row, inc_row;
227 int row;
228
229 if(downward < 0) {
230 init_row = dest.end_row - 1;
231 test_row = dest.start_row - 1;
232 inc_row = -1;
233 }
234 else {
235 init_row = dest.start_row;
236 test_row = dest.end_row;
237 inc_row = +1;
238 }
239
240 for(row = init_row; row != test_row; row += inc_row)
241 memmove(getcell(screen, row, dest.start_col),
242 getcell(screen, row + downward, src.start_col),
243 cols * sizeof(ScreenCell));
244 }
245
246 return 1;
247 }
248
249 static int moverect_user(VTermRect dest, VTermRect src, void *user)
250 {
251 VTermScreen *screen = user;
252
253 if(screen->callbacks && screen->callbacks->moverect) {
254 if(screen->damage_merge != VTERM_DAMAGE_SCROLL)
255 // Avoid an infinite loop
256 vterm_screen_flush_damage(screen);
257
258 if((*screen->callbacks->moverect)(dest, src, screen->cbdata))
259 return 1;
260 }
261
262 damagerect(screen, dest);
263
264 return 1;
265 }
266
267 static int erase_internal(VTermRect rect, int selective, void *user)
268 {
269 VTermScreen *screen = user;
270 int row, col;
271
272 for(row = rect.start_row; row < screen->state->rows && row < rect.end_row; row++) {
273 const VTermLineInfo *info = vterm_state_get_lineinfo(screen->state, row);
274
275 for(col = rect.start_col; col < rect.end_col; col++) {
276 ScreenCell *cell = getcell(screen, row, col);
277
278 if(selective && cell->pen.protected_cell)
279 continue;
280
281 cell->chars[0] = 0;
282 cell->pen = screen->pen;
283 cell->pen.dwl = info->doublewidth;
284 cell->pen.dhl = info->doubleheight;
285 }
286 }
287
288 return 1;
289 }
290
291 static int erase_user(VTermRect rect, int selective UNUSED, void *user)
292 {
293 VTermScreen *screen = user;
294
295 damagerect(screen, rect);
296
297 return 1;
298 }
299
300 static int erase(VTermRect rect, int selective, void *user)
301 {
302 erase_internal(rect, selective, user);
303 return erase_user(rect, 0, user);
304 }
305
306 static int scrollrect(VTermRect rect, int downward, int rightward, void *user)
307 {
308 VTermScreen *screen = user;
309
310 if(screen->damage_merge != VTERM_DAMAGE_SCROLL) {
311 vterm_scroll_rect(rect, downward, rightward,
312 moverect_internal, erase_internal, screen);
313
314 vterm_screen_flush_damage(screen);
315
316 vterm_scroll_rect(rect, downward, rightward,
317 moverect_user, erase_user, screen);
318
319 return 1;
320 }
321
322 if(screen->damaged.start_row != -1 &&
323 !rect_intersects(&rect, &screen->damaged)) {
324 vterm_screen_flush_damage(screen);
325 }
326
327 if(screen->pending_scrollrect.start_row == -1) {
328 screen->pending_scrollrect = rect;
329 screen->pending_scroll_downward = downward;
330 screen->pending_scroll_rightward = rightward;
331 }
332 else if(rect_equal(&screen->pending_scrollrect, &rect) &&
333 ((screen->pending_scroll_downward == 0 && downward == 0) ||
334 (screen->pending_scroll_rightward == 0 && rightward == 0))) {
335 screen->pending_scroll_downward += downward;
336 screen->pending_scroll_rightward += rightward;
337 }
338 else {
339 vterm_screen_flush_damage(screen);
340
341 screen->pending_scrollrect = rect;
342 screen->pending_scroll_downward = downward;
343 screen->pending_scroll_rightward = rightward;
344 }
345
346 vterm_scroll_rect(rect, downward, rightward,
347 moverect_internal, erase_internal, screen);
348
349 if(screen->damaged.start_row == -1)
350 return 1;
351
352 if(rect_contains(&rect, &screen->damaged)) {
353 /* Scroll region entirely contains the damage; just move it */
354 vterm_rect_move(&screen->damaged, -downward, -rightward);
355 rect_clip(&screen->damaged, &rect);
356 }
357 /* There are a number of possible cases here, but lets restrict this to only
358 * the common case where we might actually gain some performance by
359 * optimising it. Namely, a vertical scroll that neatly cuts the damage
360 * region in half.
361 */
362 else if(rect.start_col <= screen->damaged.start_col &&
363 rect.end_col >= screen->damaged.end_col &&
364 rightward == 0) {
365 if(screen->damaged.start_row >= rect.start_row &&
366 screen->damaged.start_row < rect.end_row) {
367 screen->damaged.start_row -= downward;
368 if(screen->damaged.start_row < rect.start_row)
369 screen->damaged.start_row = rect.start_row;
370 if(screen->damaged.start_row > rect.end_row)
371 screen->damaged.start_row = rect.end_row;
372 }
373 if(screen->damaged.end_row >= rect.start_row &&
374 screen->damaged.end_row < rect.end_row) {
375 screen->damaged.end_row -= downward;
376 if(screen->damaged.end_row < rect.start_row)
377 screen->damaged.end_row = rect.start_row;
378 if(screen->damaged.end_row > rect.end_row)
379 screen->damaged.end_row = rect.end_row;
380 }
381 }
382 else {
383 DEBUG_LOG2("TODO: Just flush and redo damaged=" STRFrect " rect=" STRFrect "\n",
384 ARGSrect(screen->damaged), ARGSrect(rect));
385 }
386
387 return 1;
388 }
389
390 static int movecursor(VTermPos pos, VTermPos oldpos, int visible, void *user)
391 {
392 VTermScreen *screen = user;
393
394 if(screen->callbacks && screen->callbacks->movecursor)
395 return (*screen->callbacks->movecursor)(pos, oldpos, visible, screen->cbdata);
396
397 return 0;
398 }
399
400 static int setpenattr(VTermAttr attr, VTermValue *val, void *user)
401 {
402 VTermScreen *screen = user;
403
404 switch(attr) {
405 case VTERM_ATTR_BOLD:
406 screen->pen.bold = val->boolean;
407 return 1;
408 case VTERM_ATTR_UNDERLINE:
409 screen->pen.underline = val->number;
410 return 1;
411 case VTERM_ATTR_ITALIC:
412 screen->pen.italic = val->boolean;
413 return 1;
414 case VTERM_ATTR_BLINK:
415 screen->pen.blink = val->boolean;
416 return 1;
417 case VTERM_ATTR_REVERSE:
418 screen->pen.reverse = val->boolean;
419 return 1;
420 case VTERM_ATTR_STRIKE:
421 screen->pen.strike = val->boolean;
422 return 1;
423 case VTERM_ATTR_FONT:
424 screen->pen.font = val->number;
425 return 1;
426 case VTERM_ATTR_FOREGROUND:
427 screen->pen.fg = val->color;
428 return 1;
429 case VTERM_ATTR_BACKGROUND:
430 screen->pen.bg = val->color;
431 return 1;
432
433 case VTERM_N_ATTRS:
434 return 0;
435 }
436
437 return 0;
438 }
439
440 static int settermprop(VTermProp prop, VTermValue *val, void *user)
441 {
442 VTermScreen *screen = user;
443
444 switch(prop) {
445 case VTERM_PROP_ALTSCREEN:
446 if(val->boolean && !screen->buffers[1])
447 return 0;
448
449 screen->buffer = val->boolean ? screen->buffers[1] : screen->buffers[0];
450 /* only send a damage event on disable; because during enable there's an
451 * erase that sends a damage anyway
452 */
453 if(!val->boolean)
454 damagescreen(screen);
455 break;
456 case VTERM_PROP_REVERSE:
457 screen->global_reverse = val->boolean;
458 damagescreen(screen);
459 break;
460 default:
461 ; /* ignore */
462 }
463
464 if(screen->callbacks && screen->callbacks->settermprop)
465 return (*screen->callbacks->settermprop)(prop, val, screen->cbdata);
466
467 return 1;
468 }
469
470 static int bell(void *user)
471 {
472 VTermScreen *screen = user;
473
474 if(screen->callbacks && screen->callbacks->bell)
475 return (*screen->callbacks->bell)(screen->cbdata);
476
477 return 0;
478 }
479
480 static int resize(int new_rows, int new_cols, VTermPos *delta, void *user)
481 {
482 VTermScreen *screen = user;
483
484 int is_altscreen = (screen->buffers[1] && screen->buffer == screen->buffers[1]);
485
486 int old_rows = screen->rows;
487 int old_cols = screen->cols;
488 int first_blank_row;
489
490 if(!is_altscreen && new_rows < old_rows) {
491 // Fewer rows - determine if we're going to scroll at all, and if so, push
492 // those lines to scrollback
493 VTermPos pos = { 0, 0 };
494 VTermPos cursor = screen->state->pos;
495 // Find the first blank row after the cursor.
496 for(pos.row = old_rows - 1; pos.row >= new_rows; pos.row--)
497 if(!vterm_screen_is_eol(screen, pos) || cursor.row == pos.row)
498 break;
499
500 first_blank_row = pos.row + 1;
501 if(first_blank_row > new_rows) {
502 VTermRect rect = {0,0,0,0};
503 rect.end_row = old_rows;
504 rect.end_col = old_cols;
505 scrollrect(rect, first_blank_row - new_rows, 0, user);
506 vterm_screen_flush_damage(screen);
507
508 delta->row -= first_blank_row - new_rows;
509 }
510 }
511
512 screen->buffers[0] = realloc_buffer(screen, screen->buffers[0], new_rows, new_cols);
513 if(screen->buffers[1])
514 screen->buffers[1] = realloc_buffer(screen, screen->buffers[1], new_rows, new_cols);
515
516 screen->buffer = is_altscreen ? screen->buffers[1] : screen->buffers[0];
517
518 screen->rows = new_rows;
519 screen->cols = new_cols;
520
521 if(screen->sb_buffer)
522 vterm_allocator_free(screen->vt, screen->sb_buffer);
523
524 screen->sb_buffer = vterm_allocator_malloc(screen->vt, sizeof(VTermScreenCell) * new_cols);
525
526 if(new_cols > old_cols) {
527 VTermRect rect;
528 rect.start_row = 0;
529 rect.end_row = old_rows;
530 rect.start_col = old_cols;
531 rect.end_col = new_cols;
532 damagerect(screen, rect);
533 }
534
535 if(new_rows > old_rows) {
536 if(!is_altscreen && screen->callbacks && screen->callbacks->sb_popline) {
537 int rows = new_rows - old_rows;
538 while(rows) {
539 VTermRect rect = {0,0,0,0};
540 VTermPos pos = { 0, 0 };
541 if(!(screen->callbacks->sb_popline(screen->cols, screen->sb_buffer, screen->cbdata)))
542 break;
543
544 rect.end_row = screen->rows;
545 rect.end_col = screen->cols;
546 scrollrect(rect, -1, 0, user);
547
548 for(pos.col = 0; pos.col < screen->cols; pos.col += screen->sb_buffer[pos.col].width)
549 vterm_screen_set_cell(screen, pos, screen->sb_buffer + pos.col);
550
551 rect.end_row = 1;
552 damagerect(screen, rect);
553
554 vterm_screen_flush_damage(screen);
555
556 rows--;
557 delta->row++;
558 }
559 }
560
561 {
562 VTermRect rect;
563 rect.start_row = old_rows;
564 rect.end_row = new_rows;
565 rect.start_col = 0;
566 rect.end_col = new_cols;
567 damagerect(screen, rect);
568 }
569 }
570
571 if(screen->callbacks && screen->callbacks->resize)
572 return (*screen->callbacks->resize)(new_rows, new_cols, screen->cbdata);
573
574 return 1;
575 }
576
577 static int setlineinfo(int row, const VTermLineInfo *newinfo, const VTermLineInfo *oldinfo, void *user)
578 {
579 VTermScreen *screen = user;
580 int col;
581 VTermRect rect;
582
583 if(newinfo->doublewidth != oldinfo->doublewidth ||
584 newinfo->doubleheight != oldinfo->doubleheight) {
585 for(col = 0; col < screen->cols; col++) {
586 ScreenCell *cell = getcell(screen, row, col);
587 cell->pen.dwl = newinfo->doublewidth;
588 cell->pen.dhl = newinfo->doubleheight;
589 }
590
591 rect.start_row = row;
592 rect.end_row = row + 1;
593 rect.start_col = 0;
594 rect.end_col = newinfo->doublewidth ? screen->cols / 2 : screen->cols;
595 damagerect(screen, rect);
596
597 if(newinfo->doublewidth) {
598 rect.start_col = screen->cols / 2;
599 rect.end_col = screen->cols;
600
601 erase_internal(rect, 0, user);
602 }
603 }
604
605 return 1;
606 }
607
608 static VTermStateCallbacks state_cbs = {
609 &putglyph, /* putglyph */
610 &movecursor, /* movecursor */
611 &scrollrect, /* scrollrect */
612 NULL, /* moverect */
613 &erase, /* erase */
614 NULL, /* initpen */
615 &setpenattr, /* setpenattr */
616 &settermprop, /* settermprop */
617 &bell, /* bell */
618 &resize, /* resize */
619 &setlineinfo /* setlineinfo */
620 };
621
622 static VTermScreen *screen_new(VTerm *vt)
623 {
624 VTermState *state = vterm_obtain_state(vt);
625 VTermScreen *screen;
626 int rows, cols;
627
628 if(!state)
629 return NULL;
630
631 screen = vterm_allocator_malloc(vt, sizeof(VTermScreen));
632
633 vterm_get_size(vt, &rows, &cols);
634
635 screen->vt = vt;
636 screen->state = state;
637
638 screen->damage_merge = VTERM_DAMAGE_CELL;
639 screen->damaged.start_row = -1;
640 screen->pending_scrollrect.start_row = -1;
641
642 screen->rows = rows;
643 screen->cols = cols;
644
645 screen->callbacks = NULL;
646 screen->cbdata = NULL;
647
648 screen->buffers[0] = realloc_buffer(screen, NULL, rows, cols);
649
650 screen->buffer = screen->buffers[0];
651
652 screen->sb_buffer = vterm_allocator_malloc(screen->vt, sizeof(VTermScreenCell) * cols);
653
654 vterm_state_set_callbacks(screen->state, &state_cbs, screen);
655
656 return screen;
657 }
658
659 INTERNAL void vterm_screen_free(VTermScreen *screen)
660 {
661 vterm_allocator_free(screen->vt, screen->buffers[0]);
662 if(screen->buffers[1])
663 vterm_allocator_free(screen->vt, screen->buffers[1]);
664
665 vterm_allocator_free(screen->vt, screen->sb_buffer);
666
667 vterm_allocator_free(screen->vt, screen);
668 }
669
670 void vterm_screen_reset(VTermScreen *screen, int hard)
671 {
672 screen->damaged.start_row = -1;
673 screen->pending_scrollrect.start_row = -1;
674 vterm_state_reset(screen->state, hard);
675 vterm_screen_flush_damage(screen);
676 }
677
678 static size_t _get_chars(const VTermScreen *screen, const int utf8, void *buffer, size_t len, const VTermRect rect)
679 {
680 size_t outpos = 0;
681 int padding = 0;
682 int row, col;
683
684 #define PUT(c) \
685 if(utf8) { \
686 size_t thislen = utf8_seqlen(c); \
687 if(buffer && outpos + thislen <= len) \
688 outpos += fill_utf8((c), (char *)buffer + outpos); \
689 else \
690 outpos += thislen; \
691 } \
692 else { \
693 if(buffer && outpos + 1 <= len) \
694 ((uint32_t*)buffer)[outpos++] = (c); \
695 else \
696 outpos++; \
697 }
698
699 for(row = rect.start_row; row < rect.end_row; row++) {
700 for(col = rect.start_col; col < rect.end_col; col++) {
701 ScreenCell *cell = getcell(screen, row, col);
702 int i;
703
704 if(cell->chars[0] == 0)
705 // Erased cell, might need a space
706 padding++;
707 else if(cell->chars[0] == (uint32_t)-1)
708 // Gap behind a double-width char, do nothing
709 ;
710 else {
711 while(padding) {
712 PUT(UNICODE_SPACE);
713 padding--;
714 }
715 for(i = 0; i < VTERM_MAX_CHARS_PER_CELL && cell->chars[i]; i++) {
716 PUT(cell->chars[i]);
717 }
718 }
719 }
720
721 if(row < rect.end_row - 1) {
722 PUT(UNICODE_LINEFEED);
723 padding = 0;
724 }
725 }
726
727 return outpos;
728 }
729
730 size_t vterm_screen_get_chars(const VTermScreen *screen, uint32_t *chars, size_t len, const VTermRect rect)
731 {
732 return _get_chars(screen, 0, chars, len, rect);
733 }
734
735 size_t vterm_screen_get_text(const VTermScreen *screen, char *str, size_t len, const VTermRect rect)
736 {
737 return _get_chars(screen, 1, str, len, rect);
738 }
739
740 /* Copy internal to external representation of a screen cell */
741 int vterm_screen_get_cell(const VTermScreen *screen, VTermPos pos, VTermScreenCell *cell)
742 {
743 ScreenCell *intcell = getcell(screen, pos.row, pos.col);
744 int i;
745
746 if(!intcell)
747 return 0;
748
749 for(i = 0; ; i++) {
750 cell->chars[i] = intcell->chars[i];
751 if(!intcell->chars[i])
752 break;
753 }
754
755 cell->attrs.bold = intcell->pen.bold;
756 cell->attrs.underline = intcell->pen.underline;
757 cell->attrs.italic = intcell->pen.italic;
758 cell->attrs.blink = intcell->pen.blink;
759 cell->attrs.reverse = intcell->pen.reverse ^ screen->global_reverse;
760 cell->attrs.strike = intcell->pen.strike;
761 cell->attrs.font = intcell->pen.font;
762
763 cell->attrs.dwl = intcell->pen.dwl;
764 cell->attrs.dhl = intcell->pen.dhl;
765
766 cell->fg = intcell->pen.fg;
767 cell->bg = intcell->pen.bg;
768
769 if(pos.col < (screen->cols - 1) &&
770 getcell(screen, pos.row, pos.col + 1)->chars[0] == (uint32_t)-1)
771 cell->width = 2;
772 else
773 cell->width = 1;
774
775 return 1;
776 }
777
778 /* Copy external to internal representation of a screen cell */
779 /* static because it's only used internally for sb_popline during resize */
780 static int vterm_screen_set_cell(VTermScreen *screen, VTermPos pos, const VTermScreenCell *cell)
781 {
782 ScreenCell *intcell = getcell(screen, pos.row, pos.col);
783 int i;
784
785 if(!intcell)
786 return 0;
787
788 for(i = 0; ; i++) {
789 intcell->chars[i] = cell->chars[i];
790 if(!cell->chars[i])
791 break;
792 }
793
794 intcell->pen.bold = cell->attrs.bold;
795 intcell->pen.underline = cell->attrs.underline;
796 intcell->pen.italic = cell->attrs.italic;
797 intcell->pen.blink = cell->attrs.blink;
798 intcell->pen.reverse = cell->attrs.reverse ^ screen->global_reverse;
799 intcell->pen.strike = cell->attrs.strike;
800 intcell->pen.font = cell->attrs.font;
801
802 intcell->pen.fg = cell->fg;
803 intcell->pen.bg = cell->bg;
804
805 if(cell->width == 2)
806 getcell(screen, pos.row, pos.col + 1)->chars[0] = (uint32_t)-1;
807
808 return 1;
809 }
810
811 int vterm_screen_is_eol(const VTermScreen *screen, VTermPos pos)
812 {
813 /* This cell is EOL if this and every cell to the right is black */
814 for(; pos.col < screen->cols; pos.col++) {
815 ScreenCell *cell = getcell(screen, pos.row, pos.col);
816 if(cell->chars[0] != 0)
817 return 0;
818 }
819
820 return 1;
821 }
822
823 VTermScreen *vterm_obtain_screen(VTerm *vt)
824 {
825 if(!vt->screen)
826 vt->screen = screen_new(vt);
827 return vt->screen;
828 }
829
830 void vterm_screen_enable_altscreen(VTermScreen *screen, int altscreen)
831 {
832
833 if(!screen->buffers[1] && altscreen) {
834 int rows, cols;
835 vterm_get_size(screen->vt, &rows, &cols);
836
837 screen->buffers[1] = realloc_buffer(screen, NULL, rows, cols);
838 }
839 }
840
841 void vterm_screen_set_callbacks(VTermScreen *screen, const VTermScreenCallbacks *callbacks, void *user)
842 {
843 screen->callbacks = callbacks;
844 screen->cbdata = user;
845 }
846
847 void *vterm_screen_get_cbdata(VTermScreen *screen)
848 {
849 return screen->cbdata;
850 }
851
852 void vterm_screen_set_unrecognised_fallbacks(VTermScreen *screen, const VTermParserCallbacks *fallbacks, void *user)
853 {
854 vterm_state_set_unrecognised_fallbacks(screen->state, fallbacks, user);
855 }
856
857 void *vterm_screen_get_unrecognised_fbdata(VTermScreen *screen)
858 {
859 return vterm_state_get_unrecognised_fbdata(screen->state);
860 }
861
862 void vterm_screen_flush_damage(VTermScreen *screen)
863 {
864 if(screen->pending_scrollrect.start_row != -1) {
865 vterm_scroll_rect(screen->pending_scrollrect, screen->pending_scroll_downward, screen->pending_scroll_rightward,
866 moverect_user, erase_user, screen);
867
868 screen->pending_scrollrect.start_row = -1;
869 }
870
871 if(screen->damaged.start_row != -1) {
872 if(screen->callbacks && screen->callbacks->damage)
873 (*screen->callbacks->damage)(screen->damaged, screen->cbdata);
874
875 screen->damaged.start_row = -1;
876 }
877 }
878
879 void vterm_screen_set_damage_merge(VTermScreen *screen, VTermDamageSize size)
880 {
881 vterm_screen_flush_damage(screen);
882 screen->damage_merge = size;
883 }
884
885 static int attrs_differ(VTermAttrMask attrs, ScreenCell *a, ScreenCell *b)
886 {
887 if((attrs & VTERM_ATTR_BOLD_MASK) && (a->pen.bold != b->pen.bold))
888 return 1;
889 if((attrs & VTERM_ATTR_UNDERLINE_MASK) && (a->pen.underline != b->pen.underline))
890 return 1;
891 if((attrs & VTERM_ATTR_ITALIC_MASK) && (a->pen.italic != b->pen.italic))
892 return 1;
893 if((attrs & VTERM_ATTR_BLINK_MASK) && (a->pen.blink != b->pen.blink))
894 return 1;
895 if((attrs & VTERM_ATTR_REVERSE_MASK) && (a->pen.reverse != b->pen.reverse))
896 return 1;
897 if((attrs & VTERM_ATTR_STRIKE_MASK) && (a->pen.strike != b->pen.strike))
898 return 1;
899 if((attrs & VTERM_ATTR_FONT_MASK) && (a->pen.font != b->pen.font))
900 return 1;
901 if((attrs & VTERM_ATTR_FOREGROUND_MASK) && !vterm_color_equal(a->pen.fg, b->pen.fg))
902 return 1;
903 if((attrs & VTERM_ATTR_BACKGROUND_MASK) && !vterm_color_equal(a->pen.bg, b->pen.bg))
904 return 1;
905
906 return 0;
907 }
908
909 int vterm_screen_get_attrs_extent(const VTermScreen *screen, VTermRect *extent, VTermPos pos, VTermAttrMask attrs)
910 {
911 int col;
912
913 ScreenCell *target = getcell(screen, pos.row, pos.col);
914
915 // TODO: bounds check
916 extent->start_row = pos.row;
917 extent->end_row = pos.row + 1;
918
919 if(extent->start_col < 0)
920 extent->start_col = 0;
921 if(extent->end_col < 0)
922 extent->end_col = screen->cols;
923
924 for(col = pos.col - 1; col >= extent->start_col; col--)
925 if(attrs_differ(attrs, target, getcell(screen, pos.row, col)))
926 break;
927 extent->start_col = col + 1;
928
929 for(col = pos.col + 1; col < extent->end_col; col++)
930 if(attrs_differ(attrs, target, getcell(screen, pos.row, col)))
931 break;
932 extent->end_col = col - 1;
933
934 return 1;
935 }