forked from tmux/tmux
-
Notifications
You must be signed in to change notification settings - Fork 1
/
grid.c
1382 lines (1206 loc) · 30.6 KB
/
grid.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/* $OpenBSD$ */
/*
* Copyright (c) 2008 Nicholas Marriott <[email protected]>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <stdlib.h>
#include <string.h>
#include "tmux.h"
/*
* Grid data. This is the basic data structure that represents what is shown on
* screen.
*
* A grid is a grid of cells (struct grid_cell). Lines are not allocated until
* cells in that line are written to. The grid is split into history and
* viewable data with the history starting at row (line) 0 and extending to
* (hsize - 1); from hsize to hsize + (sy - 1) is the viewable data. All
* functions in this file work on absolute coordinates, grid-view.c has
* functions which work on the screen data.
*/
/* Default grid cell data. */
const struct grid_cell grid_default_cell = {
{ { ' ' }, 0, 1, 1 }, 0, 0, 8, 8, 0
};
/* Cleared grid cell data. */
const struct grid_cell grid_cleared_cell = {
{ { ' ' }, 0, 1, 1 }, 0, GRID_FLAG_CLEARED, 8, 8, 0
};
static const struct grid_cell_entry grid_cleared_entry = {
GRID_FLAG_CLEARED, { .data = { 0, 8, 8, ' ' } }
};
static void grid_empty_line(struct grid *, u_int, u_int);
/* Store cell in entry. */
static void
grid_store_cell(struct grid_cell_entry *gce, const struct grid_cell *gc,
u_char c)
{
gce->flags = (gc->flags & ~GRID_FLAG_CLEARED);
gce->data.fg = gc->fg & 0xff;
if (gc->fg & COLOUR_FLAG_256)
gce->flags |= GRID_FLAG_FG256;
gce->data.bg = gc->bg & 0xff;
if (gc->bg & COLOUR_FLAG_256)
gce->flags |= GRID_FLAG_BG256;
gce->data.attr = gc->attr;
gce->data.data = c;
}
/* Check if a cell should be an extended cell. */
static int
grid_need_extended_cell(const struct grid_cell_entry *gce,
const struct grid_cell *gc)
{
if (gce->flags & GRID_FLAG_EXTENDED)
return (1);
if (gc->attr > 0xff)
return (1);
if (gc->data.size != 1 || gc->data.width != 1)
return (1);
if ((gc->fg & COLOUR_FLAG_RGB) || (gc->bg & COLOUR_FLAG_RGB))
return (1);
if (gc->us != 0) /* only supports 256 or RGB */
return (1);
return (0);
}
/* Get an extended cell. */
static void
grid_get_extended_cell(struct grid_line *gl, struct grid_cell_entry *gce,
int flags)
{
u_int at = gl->extdsize + 1;
gl->extddata = xreallocarray(gl->extddata, at, sizeof *gl->extddata);
gl->extdsize = at;
gce->offset = at - 1;
gce->flags = (flags | GRID_FLAG_EXTENDED);
}
/* Set cell as extended. */
static struct grid_cell *
grid_extended_cell(struct grid_line *gl, struct grid_cell_entry *gce,
const struct grid_cell *gc)
{
struct grid_cell *gcp;
int flags = (gc->flags & ~GRID_FLAG_CLEARED);
if (~gce->flags & GRID_FLAG_EXTENDED)
grid_get_extended_cell(gl, gce, flags);
else if (gce->offset >= gl->extdsize)
fatalx("offset too big");
gl->flags |= GRID_LINE_EXTENDED;
gcp = &gl->extddata[gce->offset];
memcpy(gcp, gc, sizeof *gcp);
gcp->flags = flags;
return (gcp);
}
/* Free up unused extended cells. */
static void
grid_compact_line(struct grid_line *gl)
{
int new_extdsize = 0;
struct grid_cell *new_extddata;
struct grid_cell_entry *gce;
struct grid_cell *gc;
u_int px, idx;
if (gl->extdsize == 0)
return;
for (px = 0; px < gl->cellsize; px++) {
gce = &gl->celldata[px];
if (gce->flags & GRID_FLAG_EXTENDED)
new_extdsize++;
}
if (new_extdsize == 0) {
free(gl->extddata);
gl->extddata = NULL;
gl->extdsize = 0;
return;
}
new_extddata = xreallocarray(NULL, new_extdsize, sizeof *gl->extddata);
idx = 0;
for (px = 0; px < gl->cellsize; px++) {
gce = &gl->celldata[px];
if (gce->flags & GRID_FLAG_EXTENDED) {
gc = &gl->extddata[gce->offset];
memcpy(&new_extddata[idx], gc, sizeof *gc);
gce->offset = idx++;
}
}
free(gl->extddata);
gl->extddata = new_extddata;
gl->extdsize = new_extdsize;
}
/* Get line data. */
struct grid_line *
grid_get_line(struct grid *gd, u_int line)
{
return (&gd->linedata[line]);
}
/* Adjust number of lines. */
void
grid_adjust_lines(struct grid *gd, u_int lines)
{
gd->linedata = xreallocarray(gd->linedata, lines, sizeof *gd->linedata);
}
/* Copy default into a cell. */
static void
grid_clear_cell(struct grid *gd, u_int px, u_int py, u_int bg)
{
struct grid_line *gl = &gd->linedata[py];
struct grid_cell_entry *gce = &gl->celldata[px];
struct grid_cell *gc;
memcpy(gce, &grid_cleared_entry, sizeof *gce);
if (bg & COLOUR_FLAG_RGB) {
grid_get_extended_cell(gl, gce, gce->flags);
gl->flags |= GRID_LINE_EXTENDED;
gc = &gl->extddata[gce->offset];
memcpy(gc, &grid_cleared_cell, sizeof *gc);
gc->bg = bg;
} else {
if (bg & COLOUR_FLAG_256)
gce->flags |= GRID_FLAG_BG256;
gce->data.bg = bg;
}
}
/* Check grid y position. */
static int
grid_check_y(struct grid *gd, const char* from, u_int py)
{
if (py >= gd->hsize + gd->sy) {
log_debug("%s: y out of range: %u", from, py);
return (-1);
}
return (0);
}
/* Compare grid cells. Return 1 if equal, 0 if not. */
int
grid_cells_equal(const struct grid_cell *gca, const struct grid_cell *gcb)
{
if (gca->fg != gcb->fg || gca->bg != gcb->bg)
return (0);
if (gca->attr != gcb->attr || gca->flags != gcb->flags)
return (0);
if (gca->data.width != gcb->data.width)
return (0);
if (gca->data.size != gcb->data.size)
return (0);
return (memcmp(gca->data.data, gcb->data.data, gca->data.size) == 0);
}
/* Free one line. */
static void
grid_free_line(struct grid *gd, u_int py)
{
free(gd->linedata[py].celldata);
gd->linedata[py].celldata = NULL;
free(gd->linedata[py].extddata);
gd->linedata[py].extddata = NULL;
}
/* Free several lines. */
static void
grid_free_lines(struct grid *gd, u_int py, u_int ny)
{
u_int yy;
for (yy = py; yy < py + ny; yy++)
grid_free_line(gd, yy);
}
/* Create a new grid. */
struct grid *
grid_create(u_int sx, u_int sy, u_int hlimit)
{
struct grid *gd;
gd = xmalloc(sizeof *gd);
gd->sx = sx;
gd->sy = sy;
gd->flags = GRID_HISTORY;
gd->hscrolled = 0;
gd->hsize = 0;
gd->hlimit = hlimit;
if (gd->sy != 0)
gd->linedata = xcalloc(gd->sy, sizeof *gd->linedata);
else
gd->linedata = NULL;
return (gd);
}
/* Destroy grid. */
void
grid_destroy(struct grid *gd)
{
grid_free_lines(gd, 0, gd->hsize + gd->sy);
free(gd->linedata);
free(gd);
}
/* Compare grids. */
int
grid_compare(struct grid *ga, struct grid *gb)
{
struct grid_line *gla, *glb;
struct grid_cell gca, gcb;
u_int xx, yy;
if (ga->sx != gb->sx || ga->sy != gb->sy)
return (1);
for (yy = 0; yy < ga->sy; yy++) {
gla = &ga->linedata[yy];
glb = &gb->linedata[yy];
if (gla->cellsize != glb->cellsize)
return (1);
for (xx = 0; xx < gla->cellsize; xx++) {
grid_get_cell(ga, xx, yy, &gca);
grid_get_cell(gb, xx, yy, &gcb);
if (!grid_cells_equal(&gca, &gcb))
return (1);
}
}
return (0);
}
/* Trim lines from the history. */
static void
grid_trim_history(struct grid *gd, u_int ny)
{
grid_free_lines(gd, 0, ny);
memmove(&gd->linedata[0], &gd->linedata[ny],
(gd->hsize + gd->sy - ny) * (sizeof *gd->linedata));
}
/*
* Collect lines from the history if at the limit. Free the top (oldest) 10%
* and shift up.
*/
void
grid_collect_history(struct grid *gd)
{
u_int ny;
if (gd->hsize == 0 || gd->hsize < gd->hlimit)
return;
ny = gd->hlimit / 10;
if (ny < 1)
ny = 1;
if (ny > gd->hsize)
ny = gd->hsize;
/*
* Free the lines from 0 to ny then move the remaining lines over
* them.
*/
grid_trim_history(gd, ny);
gd->hsize -= ny;
if (gd->hscrolled > gd->hsize)
gd->hscrolled = gd->hsize;
}
/*
* Scroll the entire visible screen, moving one line into the history. Just
* allocate a new line at the bottom and move the history size indicator.
*/
void
grid_scroll_history(struct grid *gd, u_int bg)
{
u_int yy;
yy = gd->hsize + gd->sy;
gd->linedata = xreallocarray(gd->linedata, yy + 1,
sizeof *gd->linedata);
grid_empty_line(gd, yy, bg);
gd->hscrolled++;
grid_compact_line(&gd->linedata[gd->hsize]);
gd->hsize++;
}
/* Clear the history. */
void
grid_clear_history(struct grid *gd)
{
grid_trim_history(gd, gd->hsize);
gd->hscrolled = 0;
gd->hsize = 0;
gd->linedata = xreallocarray(gd->linedata, gd->sy,
sizeof *gd->linedata);
}
/* Scroll a region up, moving the top line into the history. */
void
grid_scroll_history_region(struct grid *gd, u_int upper, u_int lower, u_int bg)
{
struct grid_line *gl_history, *gl_upper;
u_int yy;
/* Create a space for a new line. */
yy = gd->hsize + gd->sy;
gd->linedata = xreallocarray(gd->linedata, yy + 1,
sizeof *gd->linedata);
/* Move the entire screen down to free a space for this line. */
gl_history = &gd->linedata[gd->hsize];
memmove(gl_history + 1, gl_history, gd->sy * sizeof *gl_history);
/* Adjust the region and find its start and end. */
upper++;
gl_upper = &gd->linedata[upper];
lower++;
/* Move the line into the history. */
memcpy(gl_history, gl_upper, sizeof *gl_history);
/* Then move the region up and clear the bottom line. */
memmove(gl_upper, gl_upper + 1, (lower - upper) * sizeof *gl_upper);
grid_empty_line(gd, lower, bg);
/* Move the history offset down over the line. */
gd->hscrolled++;
gd->hsize++;
}
/* Expand line to fit to cell. */
static void
grid_expand_line(struct grid *gd, u_int py, u_int sx, u_int bg)
{
struct grid_line *gl;
u_int xx;
gl = &gd->linedata[py];
if (sx <= gl->cellsize)
return;
if (sx < gd->sx / 4)
sx = gd->sx / 4;
else if (sx < gd->sx / 2)
sx = gd->sx / 2;
else
sx = gd->sx;
gl->celldata = xreallocarray(gl->celldata, sx, sizeof *gl->celldata);
for (xx = gl->cellsize; xx < sx; xx++)
grid_clear_cell(gd, xx, py, bg);
gl->cellsize = sx;
}
/* Empty a line and set background colour if needed. */
static void
grid_empty_line(struct grid *gd, u_int py, u_int bg)
{
memset(&gd->linedata[py], 0, sizeof gd->linedata[py]);
if (!COLOUR_DEFAULT(bg))
grid_expand_line(gd, py, gd->sx, bg);
}
/* Peek at grid line. */
const struct grid_line *
grid_peek_line(struct grid *gd, u_int py)
{
if (grid_check_y(gd, __func__, py) != 0)
return (NULL);
return (&gd->linedata[py]);
}
/* Get cell from line. */
static void
grid_get_cell1(struct grid_line *gl, u_int px, struct grid_cell *gc)
{
struct grid_cell_entry *gce = &gl->celldata[px];
if (gce->flags & GRID_FLAG_EXTENDED) {
if (gce->offset >= gl->extdsize)
memcpy(gc, &grid_default_cell, sizeof *gc);
else
memcpy(gc, &gl->extddata[gce->offset], sizeof *gc);
return;
}
gc->flags = gce->flags & ~(GRID_FLAG_FG256|GRID_FLAG_BG256);
gc->attr = gce->data.attr;
gc->fg = gce->data.fg;
if (gce->flags & GRID_FLAG_FG256)
gc->fg |= COLOUR_FLAG_256;
gc->bg = gce->data.bg;
if (gce->flags & GRID_FLAG_BG256)
gc->bg |= COLOUR_FLAG_256;
gc->us = 0;
utf8_set(&gc->data, gce->data.data);
}
/* Get cell for reading. */
void
grid_get_cell(struct grid *gd, u_int px, u_int py, struct grid_cell *gc)
{
if (grid_check_y(gd, __func__, py) != 0 ||
px >= gd->linedata[py].cellsize)
memcpy(gc, &grid_default_cell, sizeof *gc);
else
grid_get_cell1(&gd->linedata[py], px, gc);
}
/* Set cell at relative position. */
void
grid_set_cell(struct grid *gd, u_int px, u_int py, const struct grid_cell *gc)
{
struct grid_line *gl;
struct grid_cell_entry *gce;
if (grid_check_y(gd, __func__, py) != 0)
return;
grid_expand_line(gd, py, px + 1, 8);
gl = &gd->linedata[py];
if (px + 1 > gl->cellused)
gl->cellused = px + 1;
gce = &gl->celldata[px];
if (grid_need_extended_cell(gce, gc))
grid_extended_cell(gl, gce, gc);
else
grid_store_cell(gce, gc, gc->data.data[0]);
}
/* Set cells at relative position. */
void
grid_set_cells(struct grid *gd, u_int px, u_int py, const struct grid_cell *gc,
const char *s, size_t slen)
{
struct grid_line *gl;
struct grid_cell_entry *gce;
struct grid_cell *gcp;
u_int i;
if (grid_check_y(gd, __func__, py) != 0)
return;
grid_expand_line(gd, py, px + slen, 8);
gl = &gd->linedata[py];
if (px + slen > gl->cellused)
gl->cellused = px + slen;
for (i = 0; i < slen; i++) {
gce = &gl->celldata[px + i];
if (grid_need_extended_cell(gce, gc)) {
gcp = grid_extended_cell(gl, gce, gc);
utf8_set(&gcp->data, s[i]);
} else
grid_store_cell(gce, gc, s[i]);
}
}
/* Clear area. */
void
grid_clear(struct grid *gd, u_int px, u_int py, u_int nx, u_int ny, u_int bg)
{
struct grid_line *gl;
u_int xx, yy, ox, sx;
if (nx == 0 || ny == 0)
return;
if (px == 0 && nx == gd->sx) {
grid_clear_lines(gd, py, ny, bg);
return;
}
if (grid_check_y(gd, __func__, py) != 0)
return;
if (grid_check_y(gd, __func__, py + ny - 1) != 0)
return;
for (yy = py; yy < py + ny; yy++) {
gl = &gd->linedata[yy];
sx = gd->sx;
if (sx > gl->cellsize)
sx = gl->cellsize;
ox = nx;
if (COLOUR_DEFAULT(bg)) {
if (px > sx)
continue;
if (px + nx > sx)
ox = sx - px;
}
grid_expand_line(gd, yy, px + ox, 8); /* default bg first */
for (xx = px; xx < px + ox; xx++)
grid_clear_cell(gd, xx, yy, bg);
}
}
/* Clear lines. This just frees and truncates the lines. */
void
grid_clear_lines(struct grid *gd, u_int py, u_int ny, u_int bg)
{
u_int yy;
if (ny == 0)
return;
if (grid_check_y(gd, __func__, py) != 0)
return;
if (grid_check_y(gd, __func__, py + ny - 1) != 0)
return;
for (yy = py; yy < py + ny; yy++) {
grid_free_line(gd, yy);
grid_empty_line(gd, yy, bg);
}
}
/* Move a group of lines. */
void
grid_move_lines(struct grid *gd, u_int dy, u_int py, u_int ny, u_int bg)
{
u_int yy;
if (ny == 0 || py == dy)
return;
if (grid_check_y(gd, __func__, py) != 0)
return;
if (grid_check_y(gd, __func__, py + ny - 1) != 0)
return;
if (grid_check_y(gd, __func__, dy) != 0)
return;
if (grid_check_y(gd, __func__, dy + ny - 1) != 0)
return;
/* Free any lines which are being replaced. */
for (yy = dy; yy < dy + ny; yy++) {
if (yy >= py && yy < py + ny)
continue;
grid_free_line(gd, yy);
}
memmove(&gd->linedata[dy], &gd->linedata[py],
ny * (sizeof *gd->linedata));
/*
* Wipe any lines that have been moved (without freeing them - they are
* still present).
*/
for (yy = py; yy < py + ny; yy++) {
if (yy < dy || yy >= dy + ny)
grid_empty_line(gd, yy, bg);
}
}
/* Move a group of cells. */
void
grid_move_cells(struct grid *gd, u_int dx, u_int px, u_int py, u_int nx,
u_int bg)
{
struct grid_line *gl;
u_int xx;
if (nx == 0 || px == dx)
return;
if (grid_check_y(gd, __func__, py) != 0)
return;
gl = &gd->linedata[py];
grid_expand_line(gd, py, px + nx, 8);
grid_expand_line(gd, py, dx + nx, 8);
memmove(&gl->celldata[dx], &gl->celldata[px],
nx * sizeof *gl->celldata);
if (dx + nx > gl->cellused)
gl->cellused = dx + nx;
/* Wipe any cells that have been moved. */
for (xx = px; xx < px + nx; xx++) {
if (xx >= dx && xx < dx + nx)
continue;
grid_clear_cell(gd, xx, py, bg);
}
}
/* Get ANSI foreground sequence. */
static size_t
grid_string_cells_fg(const struct grid_cell *gc, int *values)
{
size_t n;
u_char r, g, b;
n = 0;
if (gc->fg & COLOUR_FLAG_256) {
values[n++] = 38;
values[n++] = 5;
values[n++] = gc->fg & 0xff;
} else if (gc->fg & COLOUR_FLAG_RGB) {
values[n++] = 38;
values[n++] = 2;
colour_split_rgb(gc->fg, &r, &g, &b);
values[n++] = r;
values[n++] = g;
values[n++] = b;
} else {
switch (gc->fg) {
case 0:
case 1:
case 2:
case 3:
case 4:
case 5:
case 6:
case 7:
values[n++] = gc->fg + 30;
break;
case 8:
values[n++] = 39;
break;
case 90:
case 91:
case 92:
case 93:
case 94:
case 95:
case 96:
case 97:
values[n++] = gc->fg;
break;
}
}
return (n);
}
/* Get ANSI background sequence. */
static size_t
grid_string_cells_bg(const struct grid_cell *gc, int *values)
{
size_t n;
u_char r, g, b;
n = 0;
if (gc->bg & COLOUR_FLAG_256) {
values[n++] = 48;
values[n++] = 5;
values[n++] = gc->bg & 0xff;
} else if (gc->bg & COLOUR_FLAG_RGB) {
values[n++] = 48;
values[n++] = 2;
colour_split_rgb(gc->bg, &r, &g, &b);
values[n++] = r;
values[n++] = g;
values[n++] = b;
} else {
switch (gc->bg) {
case 0:
case 1:
case 2:
case 3:
case 4:
case 5:
case 6:
case 7:
values[n++] = gc->bg + 40;
break;
case 8:
values[n++] = 49;
break;
case 100:
case 101:
case 102:
case 103:
case 104:
case 105:
case 106:
case 107:
values[n++] = gc->bg - 10;
break;
}
}
return (n);
}
/*
* Returns ANSI code to set particular attributes (colour, bold and so on)
* given a current state.
*/
static void
grid_string_cells_code(const struct grid_cell *lastgc,
const struct grid_cell *gc, char *buf, size_t len, int escape_c0)
{
int oldc[64], newc[64], s[128];
size_t noldc, nnewc, n, i;
u_int attr = gc->attr, lastattr = lastgc->attr;
char tmp[64];
struct {
u_int mask;
u_int code;
} attrs[] = {
{ GRID_ATTR_BRIGHT, 1 },
{ GRID_ATTR_DIM, 2 },
{ GRID_ATTR_ITALICS, 3 },
{ GRID_ATTR_UNDERSCORE, 4 },
{ GRID_ATTR_BLINK, 5 },
{ GRID_ATTR_REVERSE, 7 },
{ GRID_ATTR_HIDDEN, 8 },
{ GRID_ATTR_STRIKETHROUGH, 9 },
{ GRID_ATTR_UNDERSCORE_2, 42 },
{ GRID_ATTR_UNDERSCORE_3, 43 },
{ GRID_ATTR_UNDERSCORE_4, 44 },
{ GRID_ATTR_UNDERSCORE_5, 45 },
{ GRID_ATTR_OVERLINE, 53 },
};
n = 0;
/* If any attribute is removed, begin with 0. */
for (i = 0; i < nitems(attrs); i++) {
if (!(attr & attrs[i].mask) && (lastattr & attrs[i].mask)) {
s[n++] = 0;
lastattr &= GRID_ATTR_CHARSET;
break;
}
}
/* For each attribute that is newly set, add its code. */
for (i = 0; i < nitems(attrs); i++) {
if ((attr & attrs[i].mask) && !(lastattr & attrs[i].mask))
s[n++] = attrs[i].code;
}
/* Write the attributes. */
*buf = '\0';
if (n > 0) {
if (escape_c0)
strlcat(buf, "\\033[", len);
else
strlcat(buf, "\033[", len);
for (i = 0; i < n; i++) {
if (s[i] < 10)
xsnprintf(tmp, sizeof tmp, "%d", s[i]);
else {
xsnprintf(tmp, sizeof tmp, "%d:%d", s[i] / 10,
s[i] % 10);
}
strlcat(buf, tmp, len);
if (i + 1 < n)
strlcat(buf, ";", len);
}
strlcat(buf, "m", len);
}
/* If the foreground colour changed, write its parameters. */
nnewc = grid_string_cells_fg(gc, newc);
noldc = grid_string_cells_fg(lastgc, oldc);
if (nnewc != noldc ||
memcmp(newc, oldc, nnewc * sizeof newc[0]) != 0 ||
(n != 0 && s[0] == 0)) {
if (escape_c0)
strlcat(buf, "\\033[", len);
else
strlcat(buf, "\033[", len);
for (i = 0; i < nnewc; i++) {
if (i + 1 < nnewc)
xsnprintf(tmp, sizeof tmp, "%d;", newc[i]);
else
xsnprintf(tmp, sizeof tmp, "%d", newc[i]);
strlcat(buf, tmp, len);
}
strlcat(buf, "m", len);
}
/* If the background colour changed, append its parameters. */
nnewc = grid_string_cells_bg(gc, newc);
noldc = grid_string_cells_bg(lastgc, oldc);
if (nnewc != noldc ||
memcmp(newc, oldc, nnewc * sizeof newc[0]) != 0 ||
(n != 0 && s[0] == 0)) {
if (escape_c0)
strlcat(buf, "\\033[", len);
else
strlcat(buf, "\033[", len);
for (i = 0; i < nnewc; i++) {
if (i + 1 < nnewc)
xsnprintf(tmp, sizeof tmp, "%d;", newc[i]);
else
xsnprintf(tmp, sizeof tmp, "%d", newc[i]);
strlcat(buf, tmp, len);
}
strlcat(buf, "m", len);
}
/* Append shift in/shift out if needed. */
if ((attr & GRID_ATTR_CHARSET) && !(lastattr & GRID_ATTR_CHARSET)) {
if (escape_c0)
strlcat(buf, "\\016", len); /* SO */
else
strlcat(buf, "\016", len); /* SO */
}
if (!(attr & GRID_ATTR_CHARSET) && (lastattr & GRID_ATTR_CHARSET)) {
if (escape_c0)
strlcat(buf, "\\017", len); /* SI */
else
strlcat(buf, "\017", len); /* SI */
}
}
/* Convert cells into a string. */
char *
grid_string_cells(struct grid *gd, u_int px, u_int py, u_int nx,
struct grid_cell **lastgc, int with_codes, int escape_c0, int trim)
{
struct grid_cell gc;
static struct grid_cell lastgc1;
const char *data;
char *buf, code[128];
size_t len, off, size, codelen;
u_int xx;
const struct grid_line *gl;
if (lastgc != NULL && *lastgc == NULL) {
memcpy(&lastgc1, &grid_default_cell, sizeof lastgc1);
*lastgc = &lastgc1;
}
len = 128;
buf = xmalloc(len);
off = 0;
gl = grid_peek_line(gd, py);
for (xx = px; xx < px + nx; xx++) {
if (gl == NULL || xx >= gl->cellsize)
break;
grid_get_cell(gd, xx, py, &gc);
if (gc.flags & GRID_FLAG_PADDING)
continue;
if (with_codes) {
grid_string_cells_code(*lastgc, &gc, code, sizeof code,
escape_c0);
codelen = strlen(code);
memcpy(*lastgc, &gc, sizeof **lastgc);
} else
codelen = 0;
data = gc.data.data;
size = gc.data.size;
if (escape_c0 && size == 1 && *data == '\\') {
data = "\\\\";
size = 2;
}
while (len < off + size + codelen + 1) {
buf = xreallocarray(buf, 2, len);
len *= 2;
}
if (codelen != 0) {
memcpy(buf + off, code, codelen);
off += codelen;
}
memcpy(buf + off, data, size);
off += size;
}
if (trim) {
while (off > 0 && buf[off - 1] == ' ')
off--;
}
buf[off] = '\0';
return (buf);
}
/*
* Duplicate a set of lines between two grids. Both source and destination
* should be big enough.
*/
void
grid_duplicate_lines(struct grid *dst, u_int dy, struct grid *src, u_int sy,
u_int ny)
{
struct grid_line *dstl, *srcl;
u_int yy;
if (dy + ny > dst->hsize + dst->sy)
ny = dst->hsize + dst->sy - dy;
if (sy + ny > src->hsize + src->sy)
ny = src->hsize + src->sy - sy;
grid_free_lines(dst, dy, ny);
for (yy = 0; yy < ny; yy++) {
srcl = &src->linedata[sy];
dstl = &dst->linedata[dy];
memcpy(dstl, srcl, sizeof *dstl);
if (srcl->cellsize != 0) {
dstl->celldata = xreallocarray(NULL,
srcl->cellsize, sizeof *dstl->celldata);
memcpy(dstl->celldata, srcl->celldata,
srcl->cellsize * sizeof *dstl->celldata);
} else
dstl->celldata = NULL;
if (srcl->extdsize != 0) {
dstl->extdsize = srcl->extdsize;
dstl->extddata = xreallocarray(NULL, dstl->extdsize,
sizeof *dstl->extddata);
memcpy(dstl->extddata, srcl->extddata, dstl->extdsize *
sizeof *dstl->extddata);
}
sy++;
dy++;