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comparison src/libvterm/src/screen.c @ 18267:da6a7491e148 v8.1.2128

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patch 8.1.2128: renamed libvterm sources makes merging difficult Commit: https://github.com/vim/vim/commit/93268054428fe3a6bbe3f89d2def2fec4eabcf5f Author: Bram Moolenaar <Bram@vim.org> Date: Thu Oct 10 13:22:54 2019 +0200 patch 8.1.2128: renamed libvterm sources makes merging difficult Problem: Renamed libvterm sources makes merging difficult. Solution: Rename back to the original name and only rename the .o files. Also clean the libvterm build artifacts. (James McCoy, closes #5027)
author Bram Moolenaar <Bram@vim.org>
date Thu, 10 Oct 2019 13:30:04 +0200
parents src/libvterm/src/termscreen.c@9c3347b21b89
children 3be01cf0a632
comparison
equal deleted inserted replaced
18266:4af19863e264 18267:da6a7491e148
1 #include "vterm_internal.h"
2
3 // vim: set sw=2 :
4 #include <stdio.h>
5 #include <string.h>
6
7 #include "rect.h"
8 #include "utf8.h"
9
10 #define UNICODE_SPACE 0x20
11 #define UNICODE_LINEFEED 0x0a
12
13 // State of the pen at some moment in time, also used in a cell
14 typedef struct
15 {
16 // After the bitfield
17 VTermColor fg, bg;
18
19 unsigned int bold : 1;
20 unsigned int underline : 2;
21 unsigned int italic : 1;
22 unsigned int blink : 1;
23 unsigned int reverse : 1;
24 unsigned int strike : 1;
25 unsigned int font : 4; // 0 to 9
26
27 // Extra state storage that isn't strictly pen-related
28 unsigned int protected_cell : 1;
29 unsigned int dwl : 1; // on a DECDWL or DECDHL line
30 unsigned int dhl : 2; // on a DECDHL line (1=top 2=bottom)
31 } ScreenPen;
32
33 // Internal representation of a screen cell
34 typedef struct
35 {
36 uint32_t chars[VTERM_MAX_CHARS_PER_CELL];
37 ScreenPen pen;
38 } ScreenCell;
39
40 static int vterm_screen_set_cell(VTermScreen *screen, VTermPos pos, const VTermScreenCell *cell);
41
42 struct VTermScreen
43 {
44 VTerm *vt;
45 VTermState *state;
46
47 const VTermScreenCallbacks *callbacks;
48 void *cbdata;
49
50 VTermDamageSize damage_merge;
51 // start_row == -1 => no damage
52 VTermRect damaged;
53 VTermRect pending_scrollrect;
54 int pending_scroll_downward, pending_scroll_rightward;
55
56 int rows;
57 int cols;
58 int global_reverse;
59
60 // Primary and Altscreen. buffers[1] is lazily allocated as needed
61 ScreenCell *buffers[2];
62
63 // buffer will == buffers[0] or buffers[1], depending on altscreen
64 ScreenCell *buffer;
65
66 // buffer for a single screen row used in scrollback storage callbacks
67 VTermScreenCell *sb_buffer;
68
69 ScreenPen pen;
70 };
71
72 static ScreenCell *getcell(const VTermScreen *screen, int row, int col)
73 {
74 if(row < 0 || row >= screen->rows)
75 return NULL;
76 if(col < 0 || col >= screen->cols)
77 return NULL;
78 if (screen->buffer == NULL)
79 return NULL;
80 return screen->buffer + (screen->cols * row) + col;
81 }
82
83 static ScreenCell *realloc_buffer(VTermScreen *screen, ScreenCell *buffer, int new_rows, int new_cols)
84 {
85 ScreenCell *new_buffer = vterm_allocator_malloc(screen->vt, sizeof(ScreenCell) * new_rows * new_cols);
86 int row, col;
87
88 if (new_buffer == NULL)
89 return NULL;
90 for(row = 0; row < new_rows; row++) {
91 for(col = 0; col < new_cols; col++) {
92 ScreenCell *new_cell = new_buffer + row*new_cols + col;
93
94 if(buffer && row < screen->rows && col < screen->cols)
95 *new_cell = buffer[row * screen->cols + col];
96 else {
97 new_cell->chars[0] = 0;
98 new_cell->pen = screen->pen;
99 }
100 }
101 }
102
103 vterm_allocator_free(screen->vt, buffer);
104
105 return new_buffer;
106 }
107
108 static void damagerect(VTermScreen *screen, VTermRect rect)
109 {
110 VTermRect emit;
111
112 switch(screen->damage_merge) {
113 case VTERM_DAMAGE_CELL:
114 // Always emit damage event
115 emit = rect;
116 break;
117
118 case VTERM_DAMAGE_ROW:
119 // Emit damage longer than one row. Try to merge with existing damage in
120 // the same row
121 if(rect.end_row > rect.start_row + 1) {
122 // Bigger than 1 line - flush existing, emit this
123 vterm_screen_flush_damage(screen);
124 emit = rect;
125 }
126 else if(screen->damaged.start_row == -1) {
127 // None stored yet
128 screen->damaged = rect;
129 return;
130 }
131 else if(rect.start_row == screen->damaged.start_row) {
132 // Merge with the stored line
133 if(screen->damaged.start_col > rect.start_col)
134 screen->damaged.start_col = rect.start_col;
135 if(screen->damaged.end_col < rect.end_col)
136 screen->damaged.end_col = rect.end_col;
137 return;
138 }
139 else {
140 // Emit the currently stored line, store a new one
141 emit = screen->damaged;
142 screen->damaged = rect;
143 }
144 break;
145
146 case VTERM_DAMAGE_SCREEN:
147 case VTERM_DAMAGE_SCROLL:
148 // Never emit damage event
149 if(screen->damaged.start_row == -1)
150 screen->damaged = rect;
151 else {
152 rect_expand(&screen->damaged, &rect);
153 }
154 return;
155
156 default:
157 DEBUG_LOG1("TODO: Maybe merge damage for level %d\n", screen->damage_merge);
158 return;
159 }
160
161 if(screen->callbacks && screen->callbacks->damage)
162 (*screen->callbacks->damage)(emit, screen->cbdata);
163 }
164
165 static void damagescreen(VTermScreen *screen)
166 {
167 VTermRect rect = {0,0,0,0};
168 rect.end_row = screen->rows;
169 rect.end_col = screen->cols;
170
171 damagerect(screen, rect);
172 }
173
174 static int putglyph(VTermGlyphInfo *info, VTermPos pos, void *user)
175 {
176 int i;
177 int col;
178 VTermRect rect;
179
180 VTermScreen *screen = user;
181 ScreenCell *cell = getcell(screen, pos.row, pos.col);
182
183 if(!cell)
184 return 0;
185
186 for(i = 0; i < VTERM_MAX_CHARS_PER_CELL && info->chars[i]; i++) {
187 cell->chars[i] = info->chars[i];
188 cell->pen = screen->pen;
189 }
190 if(i < VTERM_MAX_CHARS_PER_CELL)
191 cell->chars[i] = 0;
192
193 for(col = 1; col < info->width; col++)
194 getcell(screen, pos.row, pos.col + col)->chars[0] = (uint32_t)-1;
195
196 rect.start_row = pos.row;
197 rect.end_row = pos.row+1;
198 rect.start_col = pos.col;
199 rect.end_col = pos.col+info->width;
200
201 cell->pen.protected_cell = info->protected_cell;
202 cell->pen.dwl = info->dwl;
203 cell->pen.dhl = info->dhl;
204
205 damagerect(screen, rect);
206
207 return 1;
208 }
209
210 static int moverect_internal(VTermRect dest, VTermRect src, void *user)
211 {
212 VTermScreen *screen = user;
213
214 if(screen->callbacks && screen->callbacks->sb_pushline &&
215 dest.start_row == 0 && dest.start_col == 0 && // starts top-left corner
216 dest.end_col == screen->cols && // full width
217 screen->buffer == screen->buffers[0]) { // not altscreen
218 VTermPos pos;
219 for(pos.row = 0; pos.row < src.start_row; pos.row++) {
220 for(pos.col = 0; pos.col < screen->cols; pos.col++)
221 (void)vterm_screen_get_cell(screen, pos, screen->sb_buffer + pos.col);
222
223 (screen->callbacks->sb_pushline)(screen->cols, screen->sb_buffer, screen->cbdata);
224 }
225 }
226
227 {
228 int cols = src.end_col - src.start_col;
229 int downward = src.start_row - dest.start_row;
230 int init_row, test_row, inc_row;
231 int row;
232
233 if(downward < 0) {
234 init_row = dest.end_row - 1;
235 test_row = dest.start_row - 1;
236 inc_row = -1;
237 }
238 else {
239 init_row = dest.start_row;
240 test_row = dest.end_row;
241 inc_row = +1;
242 }
243
244 for(row = init_row; row != test_row; row += inc_row)
245 memmove(getcell(screen, row, dest.start_col),
246 getcell(screen, row + downward, src.start_col),
247 cols * sizeof(ScreenCell));
248 }
249
250 return 1;
251 }
252
253 static int moverect_user(VTermRect dest, VTermRect src, void *user)
254 {
255 VTermScreen *screen = user;
256
257 if(screen->callbacks && screen->callbacks->moverect) {
258 if(screen->damage_merge != VTERM_DAMAGE_SCROLL)
259 // Avoid an infinite loop
260 vterm_screen_flush_damage(screen);
261
262 if((*screen->callbacks->moverect)(dest, src, screen->cbdata))
263 return 1;
264 }
265
266 damagerect(screen, dest);
267
268 return 1;
269 }
270
271 static int erase_internal(VTermRect rect, int selective, void *user)
272 {
273 VTermScreen *screen = user;
274 int row, col;
275
276 for(row = rect.start_row; row < screen->state->rows && row < rect.end_row; row++) {
277 const VTermLineInfo *info = vterm_state_get_lineinfo(screen->state, row);
278
279 for(col = rect.start_col; col < rect.end_col; col++) {
280 ScreenCell *cell = getcell(screen, row, col);
281
282 if(selective && cell->pen.protected_cell)
283 continue;
284
285 cell->chars[0] = 0;
286 cell->pen = screen->pen;
287 cell->pen.dwl = info->doublewidth;
288 cell->pen.dhl = info->doubleheight;
289 }
290 }
291
292 return 1;
293 }
294
295 static int erase_user(VTermRect rect, int selective UNUSED, void *user)
296 {
297 VTermScreen *screen = user;
298
299 damagerect(screen, rect);
300
301 return 1;
302 }
303
304 static int erase(VTermRect rect, int selective, void *user)
305 {
306 erase_internal(rect, selective, user);
307 return erase_user(rect, 0, user);
308 }
309
310 static int scrollrect(VTermRect rect, int downward, int rightward, void *user)
311 {
312 VTermScreen *screen = user;
313
314 if(screen->damage_merge != VTERM_DAMAGE_SCROLL) {
315 vterm_scroll_rect(rect, downward, rightward,
316 moverect_internal, erase_internal, screen);
317
318 vterm_screen_flush_damage(screen);
319
320 vterm_scroll_rect(rect, downward, rightward,
321 moverect_user, erase_user, screen);
322
323 return 1;
324 }
325
326 if(screen->damaged.start_row != -1 &&
327 !rect_intersects(&rect, &screen->damaged)) {
328 vterm_screen_flush_damage(screen);
329 }
330
331 if(screen->pending_scrollrect.start_row == -1) {
332 screen->pending_scrollrect = rect;
333 screen->pending_scroll_downward = downward;
334 screen->pending_scroll_rightward = rightward;
335 }
336 else if(rect_equal(&screen->pending_scrollrect, &rect) &&
337 ((screen->pending_scroll_downward == 0 && downward == 0) ||
338 (screen->pending_scroll_rightward == 0 && rightward == 0))) {
339 screen->pending_scroll_downward += downward;
340 screen->pending_scroll_rightward += rightward;
341 }
342 else {
343 vterm_screen_flush_damage(screen);
344
345 screen->pending_scrollrect = rect;
346 screen->pending_scroll_downward = downward;
347 screen->pending_scroll_rightward = rightward;
348 }
349
350 vterm_scroll_rect(rect, downward, rightward,
351 moverect_internal, erase_internal, screen);
352
353 if(screen->damaged.start_row == -1)
354 return 1;
355
356 if(rect_contains(&rect, &screen->damaged)) {
357 // Scroll region entirely contains the damage; just move it
358 vterm_rect_move(&screen->damaged, -downward, -rightward);
359 rect_clip(&screen->damaged, &rect);
360 }
361 // There are a number of possible cases here, but lets restrict this to only
362 // the common case where we might actually gain some performance by
363 // optimising it. Namely, a vertical scroll that neatly cuts the damage
364 // region in half.
365 else if(rect.start_col <= screen->damaged.start_col &&
366 rect.end_col >= screen->damaged.end_col &&
367 rightward == 0) {
368 if(screen->damaged.start_row >= rect.start_row &&
369 screen->damaged.start_row < rect.end_row) {
370 screen->damaged.start_row -= downward;
371 if(screen->damaged.start_row < rect.start_row)
372 screen->damaged.start_row = rect.start_row;
373 if(screen->damaged.start_row > rect.end_row)
374 screen->damaged.start_row = rect.end_row;
375 }
376 if(screen->damaged.end_row >= rect.start_row &&
377 screen->damaged.end_row < rect.end_row) {
378 screen->damaged.end_row -= downward;
379 if(screen->damaged.end_row < rect.start_row)
380 screen->damaged.end_row = rect.start_row;
381 if(screen->damaged.end_row > rect.end_row)
382 screen->damaged.end_row = rect.end_row;
383 }
384 }
385 else {
386 DEBUG_LOG2("TODO: Just flush and redo damaged=" STRFrect " rect=" STRFrect "\n",
387 ARGSrect(screen->damaged), ARGSrect(rect));
388 }
389
390 return 1;
391 }
392
393 static int movecursor(VTermPos pos, VTermPos oldpos, int visible, void *user)
394 {
395 VTermScreen *screen = user;
396
397 if(screen->callbacks && screen->callbacks->movecursor)
398 return (*screen->callbacks->movecursor)(pos, oldpos, visible, screen->cbdata);
399
400 return 0;
401 }
402
403 static int setpenattr(VTermAttr attr, VTermValue *val, void *user)
404 {
405 VTermScreen *screen = user;
406
407 switch(attr) {
408 case VTERM_ATTR_BOLD:
409 screen->pen.bold = val->boolean;
410 return 1;
411 case VTERM_ATTR_UNDERLINE:
412 screen->pen.underline = val->number;
413 return 1;
414 case VTERM_ATTR_ITALIC:
415 screen->pen.italic = val->boolean;
416 return 1;
417 case VTERM_ATTR_BLINK:
418 screen->pen.blink = val->boolean;
419 return 1;
420 case VTERM_ATTR_REVERSE:
421 screen->pen.reverse = val->boolean;
422 return 1;
423 case VTERM_ATTR_STRIKE:
424 screen->pen.strike = val->boolean;
425 return 1;
426 case VTERM_ATTR_FONT:
427 screen->pen.font = val->number;
428 return 1;
429 case VTERM_ATTR_FOREGROUND:
430 screen->pen.fg = val->color;
431 return 1;
432 case VTERM_ATTR_BACKGROUND:
433 screen->pen.bg = val->color;
434 return 1;
435
436 case VTERM_N_ATTRS:
437 return 0;
438 }
439
440 return 0;
441 }
442
443 static int settermprop(VTermProp prop, VTermValue *val, void *user)
444 {
445 VTermScreen *screen = user;
446
447 switch(prop) {
448 case VTERM_PROP_ALTSCREEN:
449 if(val->boolean && !screen->buffers[1])
450 return 0;
451
452 screen->buffer = val->boolean ? screen->buffers[1] : screen->buffers[0];
453 // only send a damage event on disable; because during enable there's an
454 // erase that sends a damage anyway
455 if(!val->boolean)
456 damagescreen(screen);
457 break;
458 case VTERM_PROP_REVERSE:
459 screen->global_reverse = val->boolean;
460 damagescreen(screen);
461 break;
462 default:
463 ; // ignore
464 }
465
466 if(screen->callbacks && screen->callbacks->settermprop)
467 return (*screen->callbacks->settermprop)(prop, val, screen->cbdata);
468
469 return 1;
470 }
471
472 static int bell(void *user)
473 {
474 VTermScreen *screen = user;
475
476 if(screen->callbacks && screen->callbacks->bell)
477 return (*screen->callbacks->bell)(screen->cbdata);
478
479 return 0;
480 }
481
482 static int resize(int new_rows, int new_cols, VTermPos *delta, void *user)
483 {
484 VTermScreen *screen = user;
485
486 int is_altscreen = (screen->buffers[1] && screen->buffer == screen->buffers[1]);
487
488 int old_rows = screen->rows;
489 int old_cols = screen->cols;
490 int first_blank_row;
491
492 if(!is_altscreen && new_rows < old_rows) {
493 // Fewer rows - determine if we're going to scroll at all, and if so, push
494 // those lines to scrollback
495 VTermPos pos = { 0, 0 };
496 VTermPos cursor = screen->state->pos;
497 // Find the first blank row after the cursor.
498 for(pos.row = old_rows - 1; pos.row >= new_rows; pos.row--)
499 if(!vterm_screen_is_eol(screen, pos) || cursor.row == pos.row)
500 break;
501
502 first_blank_row = pos.row + 1;
503 if(first_blank_row > new_rows) {
504 VTermRect rect = {0,0,0,0};
505 rect.end_row = old_rows;
506 rect.end_col = old_cols;
507 scrollrect(rect, first_blank_row - new_rows, 0, user);
508 vterm_screen_flush_damage(screen);
509
510 delta->row -= first_blank_row - new_rows;
511 }
512 }
513
514 screen->buffers[0] = realloc_buffer(screen, screen->buffers[0], new_rows, new_cols);
515 if(screen->buffers[1])
516 screen->buffers[1] = realloc_buffer(screen, screen->buffers[1], new_rows, new_cols);
517
518 screen->buffer = is_altscreen ? screen->buffers[1] : screen->buffers[0];
519
520 screen->rows = new_rows;
521 screen->cols = new_cols;
522
523 vterm_allocator_free(screen->vt, screen->sb_buffer);
524
525 screen->sb_buffer = vterm_allocator_malloc(screen->vt, sizeof(VTermScreenCell) * new_cols);
526
527 if(new_cols > old_cols) {
528 VTermRect rect;
529 rect.start_row = 0;
530 rect.end_row = old_rows;
531 rect.start_col = old_cols;
532 rect.end_col = new_cols;
533 damagerect(screen, rect);
534 }
535
536 if(new_rows > old_rows) {
537 if(!is_altscreen && screen->callbacks && screen->callbacks->sb_popline) {
538 int rows = new_rows - old_rows;
539 while(rows) {
540 VTermRect rect = {0,0,0,0};
541 VTermPos pos = { 0, 0 };
542 if(!(screen->callbacks->sb_popline(screen->cols, screen->sb_buffer, screen->cbdata)))
543 break;
544
545 rect.end_row = screen->rows;
546 rect.end_col = screen->cols;
547 scrollrect(rect, -1, 0, user);
548
549 for(pos.col = 0; pos.col < screen->cols; pos.col += screen->sb_buffer[pos.col].width)
550 vterm_screen_set_cell(screen, pos, screen->sb_buffer + pos.col);
551
552 rect.end_row = 1;
553 damagerect(screen, rect);
554
555 vterm_screen_flush_damage(screen);
556
557 rows--;
558 delta->row++;
559 }
560 }
561
562 {
563 VTermRect rect;
564 rect.start_row = old_rows;
565 rect.end_row = new_rows;
566 rect.start_col = 0;
567 rect.end_col = new_cols;
568 damagerect(screen, rect);
569 }
570 }
571
572 if(screen->callbacks && screen->callbacks->resize)
573 return (*screen->callbacks->resize)(new_rows, new_cols, screen->cbdata);
574
575 return 1;
576 }
577
578 static int setlineinfo(int row, const VTermLineInfo *newinfo, const VTermLineInfo *oldinfo, void *user)
579 {
580 VTermScreen *screen = user;
581 int col;
582 VTermRect rect;
583
584 if(newinfo->doublewidth != oldinfo->doublewidth ||
585 newinfo->doubleheight != oldinfo->doubleheight) {
586 for(col = 0; col < screen->cols; col++) {
587 ScreenCell *cell = getcell(screen, row, col);
588 cell->pen.dwl = newinfo->doublewidth;
589 cell->pen.dhl = newinfo->doubleheight;
590 }
591
592 rect.start_row = row;
593 rect.end_row = row + 1;
594 rect.start_col = 0;
595 rect.end_col = newinfo->doublewidth ? screen->cols / 2 : screen->cols;
596 damagerect(screen, rect);
597
598 if(newinfo->doublewidth) {
599 rect.start_col = screen->cols / 2;
600 rect.end_col = screen->cols;
601
602 erase_internal(rect, 0, user);
603 }
604 }
605
606 return 1;
607 }
608
609 static VTermStateCallbacks state_cbs = {
610 &putglyph, // putglyph
611 &movecursor, // movecursor
612 &scrollrect, // scrollrect
613 NULL, // moverect
614 &erase, // erase
615 NULL, // initpen
616 &setpenattr, // setpenattr
617 &settermprop, // settermprop
618 &bell, // bell
619 &resize, // resize
620 &setlineinfo // setlineinfo
621 };
622
623 /*
624 * Allocate a new screen and return it.
625 * Return NULL when out of memory.
626 */
627 static VTermScreen *screen_new(VTerm *vt)
628 {
629 VTermState *state = vterm_obtain_state(vt);
630 VTermScreen *screen;
631 int rows, cols;
632
633 if (state == NULL)
634 return NULL;
635 screen = vterm_allocator_malloc(vt, sizeof(VTermScreen));
636 if (screen == NULL)
637 return NULL;
638
639 vterm_get_size(vt, &rows, &cols);
640
641 screen->vt = vt;
642 screen->state = state;
643
644 screen->damage_merge = VTERM_DAMAGE_CELL;
645 screen->damaged.start_row = -1;
646 screen->pending_scrollrect.start_row = -1;
647
648 screen->rows = rows;
649 screen->cols = cols;
650
651 screen->callbacks = NULL;
652 screen->cbdata = NULL;
653
654 screen->buffers[0] = realloc_buffer(screen, NULL, rows, cols);
655 screen->buffer = screen->buffers[0];
656 screen->sb_buffer = vterm_allocator_malloc(screen->vt, sizeof(VTermScreenCell) * cols);
657 if (screen->buffer == NULL || screen->sb_buffer == NULL)
658 {
659 vterm_screen_free(screen);
660 return NULL;
661 }
662
663 vterm_state_set_callbacks(screen->state, &state_cbs, screen);
664
665 return screen;
666 }
667
668 INTERNAL void vterm_screen_free(VTermScreen *screen)
669 {
670 vterm_allocator_free(screen->vt, screen->buffers[0]);
671 vterm_allocator_free(screen->vt, screen->buffers[1]);
672 vterm_allocator_free(screen->vt, screen->sb_buffer);
673 vterm_allocator_free(screen->vt, screen);
674 }
675
676 void vterm_screen_reset(VTermScreen *screen, int hard)
677 {
678 screen->damaged.start_row = -1;
679 screen->pending_scrollrect.start_row = -1;
680 vterm_state_reset(screen->state, hard);
681 vterm_screen_flush_damage(screen);
682 }
683
684 static size_t _get_chars(const VTermScreen *screen, const int utf8, void *buffer, size_t len, const VTermRect rect)
685 {
686 size_t outpos = 0;
687 int padding = 0;
688 int row, col;
689
690 #define PUT(c) \
691 if(utf8) { \
692 size_t thislen = utf8_seqlen(c); \
693 if(buffer && outpos + thislen <= len) \
694 outpos += fill_utf8((c), (char *)buffer + outpos); \
695 else \
696 outpos += thislen; \
697 } \
698 else { \
699 if(buffer && outpos + 1 <= len) \
700 ((uint32_t*)buffer)[outpos++] = (c); \
701 else \
702 outpos++; \
703 }
704
705 for(row = rect.start_row; row < rect.end_row; row++) {
706 for(col = rect.start_col; col < rect.end_col; col++) {
707 ScreenCell *cell = getcell(screen, row, col);
708 int i;
709
710 if(cell->chars[0] == 0)
711 // Erased cell, might need a space
712 padding++;
713 else if(cell->chars[0] == (uint32_t)-1)
714 // Gap behind a double-width char, do nothing
715 ;
716 else {
717 while(padding) {
718 PUT(UNICODE_SPACE);
719 padding--;
720 }
721 for(i = 0; i < VTERM_MAX_CHARS_PER_CELL && cell->chars[i]; i++) {
722 PUT(cell->chars[i]);
723 }
724 }
725 }
726
727 if(row < rect.end_row - 1) {
728 PUT(UNICODE_LINEFEED);
729 padding = 0;
730 }
731 }
732
733 return outpos;
734 }
735
736 size_t vterm_screen_get_chars(const VTermScreen *screen, uint32_t *chars, size_t len, const VTermRect rect)
737 {
738 return _get_chars(screen, 0, chars, len, rect);
739 }
740
741 size_t vterm_screen_get_text(const VTermScreen *screen, char *str, size_t len, const VTermRect rect)
742 {
743 return _get_chars(screen, 1, str, len, rect);
744 }
745
746 // Copy internal to external representation of a screen cell
747 int vterm_screen_get_cell(const VTermScreen *screen, VTermPos pos, VTermScreenCell *cell)
748 {
749 ScreenCell *intcell = getcell(screen, pos.row, pos.col);
750 int i;
751
752 if(!intcell)
753 return 0;
754
755 for(i = 0; ; i++) {
756 cell->chars[i] = intcell->chars[i];
757 if(!intcell->chars[i])
758 break;
759 }
760
761 cell->attrs.bold = intcell->pen.bold;
762 cell->attrs.underline = intcell->pen.underline;
763 cell->attrs.italic = intcell->pen.italic;
764 cell->attrs.blink = intcell->pen.blink;
765 cell->attrs.reverse = intcell->pen.reverse ^ screen->global_reverse;
766 cell->attrs.strike = intcell->pen.strike;
767 cell->attrs.font = intcell->pen.font;
768
769 cell->attrs.dwl = intcell->pen.dwl;
770 cell->attrs.dhl = intcell->pen.dhl;
771
772 cell->fg = intcell->pen.fg;
773 cell->bg = intcell->pen.bg;
774
775 if(vterm_get_special_pty_type() == 2) {
776 /* Get correct cell width from cell information contained in line buffer */
777 if(pos.col < (screen->cols - 1) &&
778 getcell(screen, pos.row, pos.col + 1)->chars[0] == (uint32_t)-1) {
779 if(getcell(screen, pos.row, pos.col)->chars[0] == 0x20) {
780 getcell(screen, pos.row, pos.col)->chars[0] = 0;
781 cell->width = 2;
782 } else if(getcell(screen, pos.row, pos.col)->chars[0] == 0) {
783 getcell(screen, pos.row, pos.col + 1)->chars[0] = 0;
784 cell->width = 1;
785 } else {
786 cell->width = 2;
787 }
788 } else
789 cell->width = 1;
790 } else {
791 if(pos.col < (screen->cols - 1) &&
792 getcell(screen, pos.row, pos.col + 1)->chars[0] == (uint32_t)-1)
793 cell->width = 2;
794 else
795 cell->width = 1;
796 }
797
798 return 1;
799 }
800
801 // Copy external to internal representation of a screen cell
802 /* static because it's only used internally for sb_popline during resize */
803 static int vterm_screen_set_cell(VTermScreen *screen, VTermPos pos, const VTermScreenCell *cell)
804 {
805 ScreenCell *intcell = getcell(screen, pos.row, pos.col);
806 int i;
807
808 if(!intcell)
809 return 0;
810
811 for(i = 0; ; i++) {
812 intcell->chars[i] = cell->chars[i];
813 if(!cell->chars[i])
814 break;
815 }
816
817 intcell->pen.bold = cell->attrs.bold;
818 intcell->pen.underline = cell->attrs.underline;
819 intcell->pen.italic = cell->attrs.italic;
820 intcell->pen.blink = cell->attrs.blink;
821 intcell->pen.reverse = cell->attrs.reverse ^ screen->global_reverse;
822 intcell->pen.strike = cell->attrs.strike;
823 intcell->pen.font = cell->attrs.font;
824
825 intcell->pen.fg = cell->fg;
826 intcell->pen.bg = cell->bg;
827
828 if(cell->width == 2)
829 getcell(screen, pos.row, pos.col + 1)->chars[0] = (uint32_t)-1;
830
831 return 1;
832 }
833
834 int vterm_screen_is_eol(const VTermScreen *screen, VTermPos pos)
835 {
836 // This cell is EOL if this and every cell to the right is black
837 for(; pos.col < screen->cols; pos.col++) {
838 ScreenCell *cell = getcell(screen, pos.row, pos.col);
839 if(cell->chars[0] != 0)
840 return 0;
841 }
842
843 return 1;
844 }
845
846 VTermScreen *vterm_obtain_screen(VTerm *vt)
847 {
848 if(!vt->screen)
849 vt->screen = screen_new(vt);
850 return vt->screen;
851 }
852
853 void vterm_screen_enable_altscreen(VTermScreen *screen, int altscreen)
854 {
855
856 if(!screen->buffers[1] && altscreen) {
857 int rows, cols;
858 vterm_get_size(screen->vt, &rows, &cols);
859
860 screen->buffers[1] = realloc_buffer(screen, NULL, rows, cols);
861 }
862 }
863
864 void vterm_screen_set_callbacks(VTermScreen *screen, const VTermScreenCallbacks *callbacks, void *user)
865 {
866 screen->callbacks = callbacks;
867 screen->cbdata = user;
868 }
869
870 void *vterm_screen_get_cbdata(VTermScreen *screen)
871 {
872 return screen->cbdata;
873 }
874
875 void vterm_screen_set_unrecognised_fallbacks(VTermScreen *screen, const VTermParserCallbacks *fallbacks, void *user)
876 {
877 vterm_state_set_unrecognised_fallbacks(screen->state, fallbacks, user);
878 }
879
880 void *vterm_screen_get_unrecognised_fbdata(VTermScreen *screen)
881 {
882 return vterm_state_get_unrecognised_fbdata(screen->state);
883 }
884
885 void vterm_screen_flush_damage(VTermScreen *screen)
886 {
887 if(screen->pending_scrollrect.start_row != -1) {
888 vterm_scroll_rect(screen->pending_scrollrect, screen->pending_scroll_downward, screen->pending_scroll_rightward,
889 moverect_user, erase_user, screen);
890
891 screen->pending_scrollrect.start_row = -1;
892 }
893
894 if(screen->damaged.start_row != -1) {
895 if(screen->callbacks && screen->callbacks->damage)
896 (*screen->callbacks->damage)(screen->damaged, screen->cbdata);
897
898 screen->damaged.start_row = -1;
899 }
900 }
901
902 void vterm_screen_set_damage_merge(VTermScreen *screen, VTermDamageSize size)
903 {
904 vterm_screen_flush_damage(screen);
905 screen->damage_merge = size;
906 }
907
908 static int attrs_differ(VTermAttrMask attrs, ScreenCell *a, ScreenCell *b)
909 {
910 if((attrs & VTERM_ATTR_BOLD_MASK) && (a->pen.bold != b->pen.bold))
911 return 1;
912 if((attrs & VTERM_ATTR_UNDERLINE_MASK) && (a->pen.underline != b->pen.underline))
913 return 1;
914 if((attrs & VTERM_ATTR_ITALIC_MASK) && (a->pen.italic != b->pen.italic))
915 return 1;
916 if((attrs & VTERM_ATTR_BLINK_MASK) && (a->pen.blink != b->pen.blink))
917 return 1;
918 if((attrs & VTERM_ATTR_REVERSE_MASK) && (a->pen.reverse != b->pen.reverse))
919 return 1;
920 if((attrs & VTERM_ATTR_STRIKE_MASK) && (a->pen.strike != b->pen.strike))
921 return 1;
922 if((attrs & VTERM_ATTR_FONT_MASK) && (a->pen.font != b->pen.font))
923 return 1;
924 if((attrs & VTERM_ATTR_FOREGROUND_MASK) && !vterm_color_equal(a->pen.fg, b->pen.fg))
925 return 1;
926 if((attrs & VTERM_ATTR_BACKGROUND_MASK) && !vterm_color_equal(a->pen.bg, b->pen.bg))
927 return 1;
928
929 return 0;
930 }
931
932 int vterm_screen_get_attrs_extent(const VTermScreen *screen, VTermRect *extent, VTermPos pos, VTermAttrMask attrs)
933 {
934 int col;
935
936 ScreenCell *target = getcell(screen, pos.row, pos.col);
937
938 // TODO: bounds check
939 extent->start_row = pos.row;
940 extent->end_row = pos.row + 1;
941
942 if(extent->start_col < 0)
943 extent->start_col = 0;
944 if(extent->end_col < 0)
945 extent->end_col = screen->cols;
946
947 for(col = pos.col - 1; col >= extent->start_col; col--)
948 if(attrs_differ(attrs, target, getcell(screen, pos.row, col)))
949 break;
950 extent->start_col = col + 1;
951
952 for(col = pos.col + 1; col < extent->end_col; col++)
953 if(attrs_differ(attrs, target, getcell(screen, pos.row, col)))
954 break;
955 extent->end_col = col - 1;
956
957 return 1;
958 }