?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Merge branch 'obsd-master'
[tmux.git] / screen-write.c
blob389dfd4cf4654db8faf64ea706d709c7755e2697
1 /* $OpenBSD$ */
2
3 /*
4 * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
15 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
16 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 #include <sys/types.h>
20
21 #include <stdlib.h>
22 #include <string.h>
23
24 #include "tmux.h"
25
26 static struct screen_write_citem *screen_write_collect_trim(
27 struct screen_write_ctx *, u_int, u_int, u_int, int *);
28 static void screen_write_collect_clear(struct screen_write_ctx *, u_int,
29 u_int);
30 static void screen_write_collect_scroll(struct screen_write_ctx *, u_int);
31 static void screen_write_collect_flush(struct screen_write_ctx *, int,
32 const char *);
33 static int screen_write_overwrite(struct screen_write_ctx *,
34 struct grid_cell *, u_int);
35 static const struct grid_cell *screen_write_combine(struct screen_write_ctx *,
36 const struct utf8_data *, u_int *, u_int *);
37
38 struct screen_write_citem {
39 u_int x;
40 int wrapped;
41
42 enum { TEXT, CLEAR } type;
43 u_int used;
44 u_int bg;
45
46 struct grid_cell gc;
47
48 TAILQ_ENTRY(screen_write_citem) entry;
49 };
50 struct screen_write_cline {
51 char *data;
52 TAILQ_HEAD(, screen_write_citem) items;
53 };
54 TAILQ_HEAD(, screen_write_citem) screen_write_citem_freelist =
55 TAILQ_HEAD_INITIALIZER(screen_write_citem_freelist);
56
57 static struct screen_write_citem *
58 screen_write_get_citem(void)
59 {
60 struct screen_write_citem *ci;
61
62 ci = TAILQ_FIRST(&screen_write_citem_freelist);
63 if (ci != NULL) {
64 TAILQ_REMOVE(&screen_write_citem_freelist, ci, entry);
65 memset(ci, 0, sizeof *ci);
66 return (ci);
67 }
68 return (xcalloc(1, sizeof *ci));
69 }
70
71 static void
72 screen_write_free_citem(struct screen_write_citem *ci)
73 {
74 TAILQ_INSERT_TAIL(&screen_write_citem_freelist, ci, entry);
75 }
76
77 static void
78 screen_write_offset_timer(__unused int fd, __unused short events, void *data)
79 {
80 struct window *w = data;
81
82 tty_update_window_offset(w);
83 }
84
85 /* Set cursor position. */
86 static void
87 screen_write_set_cursor(struct screen_write_ctx *ctx, int cx, int cy)
88 {
89 struct window_pane *wp = ctx->wp;
90 struct window *w;
91 struct screen *s = ctx->s;
92 struct timeval tv = { .tv_usec = 10000 };
93
94 if (cx != -1 && (u_int)cx == s->cx && cy != -1 && (u_int)cy == s->cy)
95 return;
96
97 if (cx != -1) {
98 if ((u_int)cx > screen_size_x(s)) /* allow last column */
99 cx = screen_size_x(s) - 1;
100 s->cx = cx;
101 }
102 if (cy != -1) {
103 if ((u_int)cy > screen_size_y(s) - 1)
104 cy = screen_size_y(s) - 1;
105 s->cy = cy;
106 }
107
108 if (wp == NULL)
109 return;
110 w = wp->window;
111
112 if (!event_initialized(&w->offset_timer))
113 evtimer_set(&w->offset_timer, screen_write_offset_timer, w);
114 if (!evtimer_pending(&w->offset_timer, NULL))
115 evtimer_add(&w->offset_timer, &tv);
116 }
117
118 /* Do a full redraw. */
119 static void
120 screen_write_redraw_cb(const struct tty_ctx *ttyctx)
121 {
122 struct window_pane *wp = ttyctx->arg;
123
124 if (wp != NULL)
125 wp->flags |= PANE_REDRAW;
126 }
127
128 /* Update context for client. */
129 static int
130 screen_write_set_client_cb(struct tty_ctx *ttyctx, struct client *c)
131 {
132 struct window_pane *wp = ttyctx->arg;
133
134 if (ttyctx->allow_invisible_panes) {
135 if (session_has(c->session, wp->window))
136 return (1);
137 return (0);
138 }
139
140 if (c->session->curw->window != wp->window)
141 return (0);
142 if (wp->layout_cell == NULL)
143 return (0);
144
145 if (wp->flags & (PANE_REDRAW|PANE_DROP))
146 return (-1);
147 if (c->flags & CLIENT_REDRAWPANES) {
148 /*
149 * Redraw is already deferred to redraw another pane - redraw
150 * this one also when that happens.
151 */
152 log_debug("%s: adding %%%u to deferred redraw", __func__,
153 wp->id);
154 wp->flags |= PANE_REDRAW;
155 return (-1);
156 }
157
158 ttyctx->bigger = tty_window_offset(&c->tty, &ttyctx->wox, &ttyctx->woy,
159 &ttyctx->wsx, &ttyctx->wsy);
160
161 ttyctx->xoff = ttyctx->rxoff = wp->xoff;
162 ttyctx->yoff = ttyctx->ryoff = wp->yoff;
163
164 if (status_at_line(c) == 0)
165 ttyctx->yoff += status_line_size(c);
166
167 return (1);
168 }
169
170 /* Set up context for TTY command. */
171 static void
172 screen_write_initctx(struct screen_write_ctx *ctx, struct tty_ctx *ttyctx,
173 int sync)
174 {
175 struct screen *s = ctx->s;
176
177 memset(ttyctx, 0, sizeof *ttyctx);
178
179 ttyctx->s = s;
180 ttyctx->sx = screen_size_x(s);
181 ttyctx->sy = screen_size_y(s);
182
183 ttyctx->ocx = s->cx;
184 ttyctx->ocy = s->cy;
185 ttyctx->orlower = s->rlower;
186 ttyctx->orupper = s->rupper;
187
188 memcpy(&ttyctx->defaults, &grid_default_cell, sizeof ttyctx->defaults);
189 if (ctx->init_ctx_cb != NULL) {
190 ctx->init_ctx_cb(ctx, ttyctx);
191 if (ttyctx->palette != NULL) {
192 if (ttyctx->defaults.fg == 8)
193 ttyctx->defaults.fg = ttyctx->palette->fg;
194 if (ttyctx->defaults.bg == 8)
195 ttyctx->defaults.bg = ttyctx->palette->bg;
196 }
197 } else {
198 ttyctx->redraw_cb = screen_write_redraw_cb;
199 if (ctx->wp != NULL) {
200 tty_default_colours(&ttyctx->defaults, ctx->wp);
201 ttyctx->palette = &ctx->wp->palette;
202 ttyctx->set_client_cb = screen_write_set_client_cb;
203 ttyctx->arg = ctx->wp;
204 }
205 }
206
207 if (~ctx->flags & SCREEN_WRITE_SYNC) {
208 /*
209 * For the active pane or for an overlay (no pane), we want to
210 * only use synchronized updates if requested (commands that
211 * move the cursor); for other panes, always use it, since the
212 * cursor will have to move.
213 */
214 if (ctx->wp != NULL) {
215 if (ctx->wp != ctx->wp->window->active)
216 ttyctx->num = 1;
217 else
218 ttyctx->num = sync;
219 } else
220 ttyctx->num = 0x10|sync;
221 tty_write(tty_cmd_syncstart, ttyctx);
222 ctx->flags |= SCREEN_WRITE_SYNC;
223 }
224 }
225
226 /* Make write list. */
227 void
228 screen_write_make_list(struct screen *s)
229 {
230 u_int y;
231
232 s->write_list = xcalloc(screen_size_y(s), sizeof *s->write_list);
233 for (y = 0; y < screen_size_y(s); y++)
234 TAILQ_INIT(&s->write_list[y].items);
235 }
236
237 /* Free write list. */
238 void
239 screen_write_free_list(struct screen *s)
240 {
241 u_int y;
242
243 for (y = 0; y < screen_size_y(s); y++)
244 free(s->write_list[y].data);
245 free(s->write_list);
246 }
247
248 /* Set up for writing. */
249 static void
250 screen_write_init(struct screen_write_ctx *ctx, struct screen *s)
251 {
252 memset(ctx, 0, sizeof *ctx);
253
254 ctx->s = s;
255
256 if (ctx->s->write_list == NULL)
257 screen_write_make_list(ctx->s);
258 ctx->item = screen_write_get_citem();
259
260 ctx->scrolled = 0;
261 ctx->bg = 8;
262 }
263
264 /* Initialize writing with a pane. */
265 void
266 screen_write_start_pane(struct screen_write_ctx *ctx, struct window_pane *wp,
267 struct screen *s)
268 {
269 if (s == NULL)
270 s = wp->screen;
271 screen_write_init(ctx, s);
272 ctx->wp = wp;
273
274 if (log_get_level() != 0) {
275 log_debug("%s: size %ux%u, pane %%%u (at %u,%u)",
276 __func__, screen_size_x(ctx->s), screen_size_y(ctx->s),
277 wp->id, wp->xoff, wp->yoff);
278 }
279 }
280
281 /* Initialize writing with a callback. */
282 void
283 screen_write_start_callback(struct screen_write_ctx *ctx, struct screen *s,
284 screen_write_init_ctx_cb cb, void *arg)
285 {
286 screen_write_init(ctx, s);
287
288 ctx->init_ctx_cb = cb;
289 ctx->arg = arg;
290
291 if (log_get_level() != 0) {
292 log_debug("%s: size %ux%u, with callback", __func__,
293 screen_size_x(ctx->s), screen_size_y(ctx->s));
294 }
295 }
296
297 /* Initialize writing. */
298 void
299 screen_write_start(struct screen_write_ctx *ctx, struct screen *s)
300 {
301 screen_write_init(ctx, s);
302
303 if (log_get_level() != 0) {
304 log_debug("%s: size %ux%u, no pane", __func__,
305 screen_size_x(ctx->s), screen_size_y(ctx->s));
306 }
307 }
308
309 /* Finish writing. */
310 void
311 screen_write_stop(struct screen_write_ctx *ctx)
312 {
313 screen_write_collect_end(ctx);
314 screen_write_collect_flush(ctx, 0, __func__);
315
316 screen_write_free_citem(ctx->item);
317 }
318
319 /* Reset screen state. */
320 void
321 screen_write_reset(struct screen_write_ctx *ctx)
322 {
323 struct screen *s = ctx->s;
324
325 screen_reset_tabs(s);
326 screen_write_scrollregion(ctx, 0, screen_size_y(s) - 1);
327
328 s->mode = MODE_CURSOR|MODE_WRAP;
329 if (options_get_number(global_options, "extended-keys") == 2)
330 s->mode |= MODE_KEXTENDED;
331
332 screen_write_clearscreen(ctx, 8);
333 screen_write_set_cursor(ctx, 0, 0);
334 }
335
336 /* Write character. */
337 void
338 screen_write_putc(struct screen_write_ctx *ctx, const struct grid_cell *gcp,
339 u_char ch)
340 {
341 struct grid_cell gc;
342
343 memcpy(&gc, gcp, sizeof gc);
344
345 utf8_set(&gc.data, ch);
346 screen_write_cell(ctx, &gc);
347 }
348
349 /* Calculate string length. */
350 size_t
351 screen_write_strlen(const char *fmt, ...)
352 {
353 va_list ap;
354 char *msg;
355 struct utf8_data ud;
356 u_char *ptr;
357 size_t left, size = 0;
358 enum utf8_state more;
359
360 va_start(ap, fmt);
361 xvasprintf(&msg, fmt, ap);
362 va_end(ap);
363
364 ptr = msg;
365 while (*ptr != '\0') {
366 if (*ptr > 0x7f && utf8_open(&ud, *ptr) == UTF8_MORE) {
367 ptr++;
368
369 left = strlen(ptr);
370 if (left < (size_t)ud.size - 1)
371 break;
372 while ((more = utf8_append(&ud, *ptr)) == UTF8_MORE)
373 ptr++;
374 ptr++;
375
376 if (more == UTF8_DONE)
377 size += ud.width;
378 } else {
379 if (*ptr > 0x1f && *ptr < 0x7f)
380 size++;
381 ptr++;
382 }
383 }
384
385 free(msg);
386 return (size);
387 }
388
389 /* Write string wrapped over lines. */
390 int
391 screen_write_text(struct screen_write_ctx *ctx, u_int cx, u_int width,
392 u_int lines, int more, const struct grid_cell *gcp, const char *fmt, ...)
393 {
394 struct screen *s = ctx->s;
395 va_list ap;
396 char *tmp;
397 u_int cy = s->cy, i, end, next, idx = 0, at, left;
398 struct utf8_data *text;
399 struct grid_cell gc;
400
401 memcpy(&gc, gcp, sizeof gc);
402
403 va_start(ap, fmt);
404 xvasprintf(&tmp, fmt, ap);
405 va_end(ap);
406
407 text = utf8_fromcstr(tmp);
408 free(tmp);
409
410 left = (cx + width) - s->cx;
411 for (;;) {
412 /* Find the end of what can fit on the line. */
413 at = 0;
414 for (end = idx; text[end].size != 0; end++) {
415 if (text[end].size == 1 && text[end].data[0] == '\n')
416 break;
417 if (at + text[end].width > left)
418 break;
419 at += text[end].width;
420 }
421
422 /*
423 * If we're on a space, that's the end. If not, walk back to
424 * try and find one.
425 */
426 if (text[end].size == 0)
427 next = end;
428 else if (text[end].size == 1 && text[end].data[0] == '\n')
429 next = end + 1;
430 else if (text[end].size == 1 && text[end].data[0] == ' ')
431 next = end + 1;
432 else {
433 for (i = end; i > idx; i--) {
434 if (text[i].size == 1 && text[i].data[0] == ' ')
435 break;
436 }
437 if (i != idx) {
438 next = i + 1;
439 end = i;
440 } else
441 next = end;
442 }
443
444 /* Print the line. */
445 for (i = idx; i < end; i++) {
446 utf8_copy(&gc.data, &text[i]);
447 screen_write_cell(ctx, &gc);
448 }
449
450 /* If at the bottom, stop. */
451 idx = next;
452 if (s->cy == cy + lines - 1 || text[idx].size == 0)
453 break;
454
455 screen_write_cursormove(ctx, cx, s->cy + 1, 0);
456 left = width;
457 }
458
459 /*
460 * Fail if on the last line and there is more to come or at the end, or
461 * if the text was not entirely consumed.
462 */
463 if ((s->cy == cy + lines - 1 && (!more || s->cx == cx + width)) ||
464 text[idx].size != 0) {
465 free(text);
466 return (0);
467 }
468 free(text);
469
470 /*
471 * If no more to come, move to the next line. Otherwise, leave on
472 * the same line (except if at the end).
473 */
474 if (!more || s->cx == cx + width)
475 screen_write_cursormove(ctx, cx, s->cy + 1, 0);
476 return (1);
477 }
478
479 /* Write simple string (no maximum length). */
480 void
481 screen_write_puts(struct screen_write_ctx *ctx, const struct grid_cell *gcp,
482 const char *fmt, ...)
483 {
484 va_list ap;
485
486 va_start(ap, fmt);
487 screen_write_vnputs(ctx, -1, gcp, fmt, ap);
488 va_end(ap);
489 }
490
491 /* Write string with length limit (-1 for unlimited). */
492 void
493 screen_write_nputs(struct screen_write_ctx *ctx, ssize_t maxlen,
494 const struct grid_cell *gcp, const char *fmt, ...)
495 {
496 va_list ap;
497
498 va_start(ap, fmt);
499 screen_write_vnputs(ctx, maxlen, gcp, fmt, ap);
500 va_end(ap);
501 }
502
503 void
504 screen_write_vnputs(struct screen_write_ctx *ctx, ssize_t maxlen,
505 const struct grid_cell *gcp, const char *fmt, va_list ap)
506 {
507 struct grid_cell gc;
508 struct utf8_data *ud = &gc.data;
509 char *msg;
510 u_char *ptr;
511 size_t left, size = 0;
512 enum utf8_state more;
513
514 memcpy(&gc, gcp, sizeof gc);
515 xvasprintf(&msg, fmt, ap);
516
517 ptr = msg;
518 while (*ptr != '\0') {
519 if (*ptr > 0x7f && utf8_open(ud, *ptr) == UTF8_MORE) {
520 ptr++;
521
522 left = strlen(ptr);
523 if (left < (size_t)ud->size - 1)
524 break;
525 while ((more = utf8_append(ud, *ptr)) == UTF8_MORE)
526 ptr++;
527 ptr++;
528
529 if (more != UTF8_DONE)
530 continue;
531 if (maxlen > 0 && size + ud->width > (size_t)maxlen) {
532 while (size < (size_t)maxlen) {
533 screen_write_putc(ctx, &gc, ' ');
534 size++;
535 }
536 break;
537 }
538 size += ud->width;
539 screen_write_cell(ctx, &gc);
540 } else {
541 if (maxlen > 0 && size + 1 > (size_t)maxlen)
542 break;
543
544 if (*ptr == '\001')
545 gc.attr ^= GRID_ATTR_CHARSET;
546 else if (*ptr == '\n') {
547 screen_write_linefeed(ctx, 0, 8);
548 screen_write_carriagereturn(ctx);
549 } else if (*ptr > 0x1f && *ptr < 0x7f) {
550 size++;
551 screen_write_putc(ctx, &gc, *ptr);
552 }
553 ptr++;
554 }
555 }
556
557 free(msg);
558 }
559
560 /*
561 * Copy from another screen but without the selection stuff. Assumes the target
562 * region is already big enough.
563 */
564 void
565 screen_write_fast_copy(struct screen_write_ctx *ctx, struct screen *src,
566 u_int px, u_int py, u_int nx, u_int ny)
567 {
568 struct screen *s = ctx->s;
569 struct grid *gd = src->grid;
570 struct grid_cell gc;
571 u_int xx, yy, cx, cy;
572
573 if (nx == 0 || ny == 0)
574 return;
575
576 cy = s->cy;
577 for (yy = py; yy < py + ny; yy++) {
578 if (yy >= gd->hsize + gd->sy)
579 break;
580 cx = s->cx;
581 for (xx = px; xx < px + nx; xx++) {
582 if (xx >= grid_get_line(gd, yy)->cellsize)
583 break;
584 grid_get_cell(gd, xx, yy, &gc);
585 if (xx + gc.data.width > px + nx)
586 break;
587 grid_view_set_cell(ctx->s->grid, cx, cy, &gc);
588 cx++;
589 }
590 cy++;
591 }
592 }
593
594 /* Select character set for drawing border lines. */
595 static void
596 screen_write_box_border_set(enum box_lines lines, int cell_type,
597 struct grid_cell *gc)
598 {
599 switch (lines) {
600 case BOX_LINES_NONE:
601 break;
602 case BOX_LINES_DOUBLE:
603 gc->attr &= ~GRID_ATTR_CHARSET;
604 utf8_copy(&gc->data, tty_acs_double_borders(cell_type));
605 break;
606 case BOX_LINES_HEAVY:
607 gc->attr &= ~GRID_ATTR_CHARSET;
608 utf8_copy(&gc->data, tty_acs_heavy_borders(cell_type));
609 break;
610 case BOX_LINES_ROUNDED:
611 gc->attr &= ~GRID_ATTR_CHARSET;
612 utf8_copy(&gc->data, tty_acs_rounded_borders(cell_type));
613 break;
614 case BOX_LINES_SIMPLE:
615 gc->attr &= ~GRID_ATTR_CHARSET;
616 utf8_set(&gc->data, SIMPLE_BORDERS[cell_type]);
617 break;
618 case BOX_LINES_PADDED:
619 gc->attr &= ~GRID_ATTR_CHARSET;
620 utf8_set(&gc->data, PADDED_BORDERS[cell_type]);
621 break;
622 case BOX_LINES_SINGLE:
623 case BOX_LINES_DEFAULT:
624 gc->attr |= GRID_ATTR_CHARSET;
625 utf8_set(&gc->data, CELL_BORDERS[cell_type]);
626 break;
627 }
628 }
629
630 /* Draw a horizontal line on screen. */
631 void
632 screen_write_hline(struct screen_write_ctx *ctx, u_int nx, int left, int right,
633 enum box_lines lines, const struct grid_cell *border_gc)
634 {
635 struct screen *s = ctx->s;
636 struct grid_cell gc;
637 u_int cx, cy, i;
638
639 cx = s->cx;
640 cy = s->cy;
641
642 if (border_gc != NULL)
643 memcpy(&gc, border_gc, sizeof gc);
644 else
645 memcpy(&gc, &grid_default_cell, sizeof gc);
646 gc.attr |= GRID_ATTR_CHARSET;
647
648 if (left)
649 screen_write_box_border_set(lines, CELL_LEFTJOIN, &gc);
650 else
651 screen_write_box_border_set(lines, CELL_LEFTRIGHT, &gc);
652 screen_write_cell(ctx, &gc);
653
654 screen_write_box_border_set(lines, CELL_LEFTRIGHT, &gc);
655 for (i = 1; i < nx - 1; i++)
656 screen_write_cell(ctx, &gc);
657
658 if (right)
659 screen_write_box_border_set(lines, CELL_RIGHTJOIN, &gc);
660 else
661 screen_write_box_border_set(lines, CELL_LEFTRIGHT, &gc);
662 screen_write_cell(ctx, &gc);
663
664 screen_write_set_cursor(ctx, cx, cy);
665 }
666
667 /* Draw a vertical line on screen. */
668 void
669 screen_write_vline(struct screen_write_ctx *ctx, u_int ny, int top, int bottom)
670 {
671 struct screen *s = ctx->s;
672 struct grid_cell gc;
673 u_int cx, cy, i;
674
675 cx = s->cx;
676 cy = s->cy;
677
678 memcpy(&gc, &grid_default_cell, sizeof gc);
679 gc.attr |= GRID_ATTR_CHARSET;
680
681 screen_write_putc(ctx, &gc, top ? 'w' : 'x');
682 for (i = 1; i < ny - 1; i++) {
683 screen_write_set_cursor(ctx, cx, cy + i);
684 screen_write_putc(ctx, &gc, 'x');
685 }
686 screen_write_set_cursor(ctx, cx, cy + ny - 1);
687 screen_write_putc(ctx, &gc, bottom ? 'v' : 'x');
688
689 screen_write_set_cursor(ctx, cx, cy);
690 }
691
692 /* Draw a menu on screen. */
693 void
694 screen_write_menu(struct screen_write_ctx *ctx, struct menu *menu, int choice,
695 enum box_lines lines, const struct grid_cell *menu_gc,
696 const struct grid_cell *border_gc, const struct grid_cell *choice_gc)
697 {
698 struct screen *s = ctx->s;
699 struct grid_cell default_gc;
700 const struct grid_cell *gc = &default_gc;
701 u_int cx, cy, i, j, width = menu->width;
702 const char *name;
703
704 cx = s->cx;
705 cy = s->cy;
706
707 memcpy(&default_gc, menu_gc, sizeof default_gc);
708
709 screen_write_box(ctx, menu->width + 4, menu->count + 2, lines,
710 border_gc, menu->title);
711
712 for (i = 0; i < menu->count; i++) {
713 name = menu->items[i].name;
714 if (name == NULL) {
715 screen_write_cursormove(ctx, cx, cy + 1 + i, 0);
716 screen_write_hline(ctx, width + 4, 1, 1, lines,
717 border_gc);
718 continue;
719 }
720
721 if (choice >= 0 && i == (u_int)choice && *name != '-')
722 gc = choice_gc;
723
724 screen_write_cursormove(ctx, cx + 1, cy + 1 + i, 0);
725 for (j = 0; j < width + 2; j++)
726 screen_write_putc(ctx, gc, ' ');
727
728 screen_write_cursormove(ctx, cx + 2, cy + 1 + i, 0);
729 if (*name == '-') {
730 default_gc.attr |= GRID_ATTR_DIM;
731 format_draw(ctx, gc, width, name + 1, NULL, 0);
732 default_gc.attr &= ~GRID_ATTR_DIM;
733 continue;
734 }
735
736 format_draw(ctx, gc, width, name, NULL, 0);
737 gc = &default_gc;
738 }
739
740 screen_write_set_cursor(ctx, cx, cy);
741 }
742
743 /* Draw a box on screen. */
744 void
745 screen_write_box(struct screen_write_ctx *ctx, u_int nx, u_int ny,
746 enum box_lines lines, const struct grid_cell *gcp, const char *title)
747 {
748 struct screen *s = ctx->s;
749 struct grid_cell gc;
750 u_int cx, cy, i;
751
752 cx = s->cx;
753 cy = s->cy;
754
755 if (gcp != NULL)
756 memcpy(&gc, gcp, sizeof gc);
757 else
758 memcpy(&gc, &grid_default_cell, sizeof gc);
759
760 gc.attr |= GRID_ATTR_CHARSET;
761 gc.flags |= GRID_FLAG_NOPALETTE;
762
763 /* Draw top border */
764 screen_write_box_border_set(lines, CELL_TOPLEFT, &gc);
765 screen_write_cell(ctx, &gc);
766 screen_write_box_border_set(lines, CELL_LEFTRIGHT, &gc);
767 for (i = 1; i < nx - 1; i++)
768 screen_write_cell(ctx, &gc);
769 screen_write_box_border_set(lines, CELL_TOPRIGHT, &gc);
770 screen_write_cell(ctx, &gc);
771
772 /* Draw bottom border */
773 screen_write_set_cursor(ctx, cx, cy + ny - 1);
774 screen_write_box_border_set(lines, CELL_BOTTOMLEFT, &gc);
775 screen_write_cell(ctx, &gc);
776 screen_write_box_border_set(lines, CELL_LEFTRIGHT, &gc);
777 for (i = 1; i < nx - 1; i++)
778 screen_write_cell(ctx, &gc);
779 screen_write_box_border_set(lines, CELL_BOTTOMRIGHT, &gc);
780 screen_write_cell(ctx, &gc);
781
782 /* Draw sides */
783 screen_write_box_border_set(lines, CELL_TOPBOTTOM, &gc);
784 for (i = 1; i < ny - 1; i++) {
785 /* left side */
786 screen_write_set_cursor(ctx, cx, cy + i);
787 screen_write_cell(ctx, &gc);
788 /* right side */
789 screen_write_set_cursor(ctx, cx + nx - 1, cy + i);
790 screen_write_cell(ctx, &gc);
791 }
792
793 if (title != NULL) {
794 gc.attr &= ~GRID_ATTR_CHARSET;
795 screen_write_cursormove(ctx, cx + 2, cy, 0);
796 format_draw(ctx, &gc, nx - 4, title, NULL, 0);
797 }
798
799 screen_write_set_cursor(ctx, cx, cy);
800 }
801
802 /*
803 * Write a preview version of a window. Assumes target area is big enough and
804 * already cleared.
805 */
806 void
807 screen_write_preview(struct screen_write_ctx *ctx, struct screen *src, u_int nx,
808 u_int ny)
809 {
810 struct screen *s = ctx->s;
811 struct grid_cell gc;
812 u_int cx, cy, px, py;
813
814 cx = s->cx;
815 cy = s->cy;
816
817 /*
818 * If the cursor is on, pick the area around the cursor, otherwise use
819 * the top left.
820 */
821 if (src->mode & MODE_CURSOR) {
822 px = src->cx;
823 if (px < nx / 3)
824 px = 0;
825 else
826 px = px - nx / 3;
827 if (px + nx > screen_size_x(src)) {
828 if (nx > screen_size_x(src))
829 px = 0;
830 else
831 px = screen_size_x(src) - nx;
832 }
833 py = src->cy;
834 if (py < ny / 3)
835 py = 0;
836 else
837 py = py - ny / 3;
838 if (py + ny > screen_size_y(src)) {
839 if (ny > screen_size_y(src))
840 py = 0;
841 else
842 py = screen_size_y(src) - ny;
843 }
844 } else {
845 px = 0;
846 py = 0;
847 }
848
849 screen_write_fast_copy(ctx, src, px, src->grid->hsize + py, nx, ny);
850
851 if (src->mode & MODE_CURSOR) {
852 grid_view_get_cell(src->grid, src->cx, src->cy, &gc);
853 gc.attr |= GRID_ATTR_REVERSE;
854 screen_write_set_cursor(ctx, cx + (src->cx - px),
855 cy + (src->cy - py));
856 screen_write_cell(ctx, &gc);
857 }
858 }
859
860 /* Set a mode. */
861 void
862 screen_write_mode_set(struct screen_write_ctx *ctx, int mode)
863 {
864 struct screen *s = ctx->s;
865
866 s->mode |= mode;
867
868 if (log_get_level() != 0)
869 log_debug("%s: %s", __func__, screen_mode_to_string(mode));
870 }
871
872 /* Clear a mode. */
873 void
874 screen_write_mode_clear(struct screen_write_ctx *ctx, int mode)
875 {
876 struct screen *s = ctx->s;
877
878 s->mode &= ~mode;
879
880 if (log_get_level() != 0)
881 log_debug("%s: %s", __func__, screen_mode_to_string(mode));
882 }
883
884 /* Cursor up by ny. */
885 void
886 screen_write_cursorup(struct screen_write_ctx *ctx, u_int ny)
887 {
888 struct screen *s = ctx->s;
889 u_int cx = s->cx, cy = s->cy;
890
891 if (ny == 0)
892 ny = 1;
893
894 if (cy < s->rupper) {
895 /* Above region. */
896 if (ny > cy)
897 ny = cy;
898 } else {
899 /* Below region. */
900 if (ny > cy - s->rupper)
901 ny = cy - s->rupper;
902 }
903 if (cx == screen_size_x(s))
904 cx--;
905
906 cy -= ny;
907
908 screen_write_set_cursor(ctx, cx, cy);
909 }
910
911 /* Cursor down by ny. */
912 void
913 screen_write_cursordown(struct screen_write_ctx *ctx, u_int ny)
914 {
915 struct screen *s = ctx->s;
916 u_int cx = s->cx, cy = s->cy;
917
918 if (ny == 0)
919 ny = 1;
920
921 if (cy > s->rlower) {
922 /* Below region. */
923 if (ny > screen_size_y(s) - 1 - cy)
924 ny = screen_size_y(s) - 1 - cy;
925 } else {
926 /* Above region. */
927 if (ny > s->rlower - cy)
928 ny = s->rlower - cy;
929 }
930 if (cx == screen_size_x(s))
931 cx--;
932 else if (ny == 0)
933 return;
934
935 cy += ny;
936
937 screen_write_set_cursor(ctx, cx, cy);
938 }
939
940 /* Cursor right by nx. */
941 void
942 screen_write_cursorright(struct screen_write_ctx *ctx, u_int nx)
943 {
944 struct screen *s = ctx->s;
945 u_int cx = s->cx, cy = s->cy;
946
947 if (nx == 0)
948 nx = 1;
949
950 if (nx > screen_size_x(s) - 1 - cx)
951 nx = screen_size_x(s) - 1 - cx;
952 if (nx == 0)
953 return;
954
955 cx += nx;
956
957 screen_write_set_cursor(ctx, cx, cy);
958 }
959
960 /* Cursor left by nx. */
961 void
962 screen_write_cursorleft(struct screen_write_ctx *ctx, u_int nx)
963 {
964 struct screen *s = ctx->s;
965 u_int cx = s->cx, cy = s->cy;
966
967 if (nx == 0)
968 nx = 1;
969
970 if (nx > cx)
971 nx = cx;
972 if (nx == 0)
973 return;
974
975 cx -= nx;
976
977 screen_write_set_cursor(ctx, cx, cy);
978 }
979
980 /* Backspace; cursor left unless at start of wrapped line when can move up. */
981 void
982 screen_write_backspace(struct screen_write_ctx *ctx)
983 {
984 struct screen *s = ctx->s;
985 struct grid_line *gl;
986 u_int cx = s->cx, cy = s->cy;
987
988 if (cx == 0) {
989 if (cy == 0)
990 return;
991 gl = grid_get_line(s->grid, s->grid->hsize + cy - 1);
992 if (gl->flags & GRID_LINE_WRAPPED) {
993 cy--;
994 cx = screen_size_x(s) - 1;
995 }
996 } else
997 cx--;
998
999 screen_write_set_cursor(ctx, cx, cy);
1000 }
1001
1002 /* VT100 alignment test. */
1003 void
1004 screen_write_alignmenttest(struct screen_write_ctx *ctx)
1005 {
1006 struct screen *s = ctx->s;
1007 struct tty_ctx ttyctx;
1008 struct grid_cell gc;
1009 u_int xx, yy;
1010
1011 memcpy(&gc, &grid_default_cell, sizeof gc);
1012 utf8_set(&gc.data, 'E');
1013
1014 #ifdef ENABLE_SIXEL
1015 if (image_free_all(s) && ctx->wp != NULL)
1016 ctx->wp->flags |= PANE_REDRAW;
1017 #endif
1018
1019 for (yy = 0; yy < screen_size_y(s); yy++) {
1020 for (xx = 0; xx < screen_size_x(s); xx++)
1021 grid_view_set_cell(s->grid, xx, yy, &gc);
1022 }
1023
1024 screen_write_set_cursor(ctx, 0, 0);
1025
1026 s->rupper = 0;
1027 s->rlower = screen_size_y(s) - 1;
1028
1029 screen_write_initctx(ctx, &ttyctx, 1);
1030
1031 screen_write_collect_clear(ctx, 0, screen_size_y(s) - 1);
1032 tty_write(tty_cmd_alignmenttest, &ttyctx);
1033 }
1034
1035 /* Insert nx characters. */
1036 void
1037 screen_write_insertcharacter(struct screen_write_ctx *ctx, u_int nx, u_int bg)
1038 {
1039 struct screen *s = ctx->s;
1040 struct tty_ctx ttyctx;
1041
1042 if (nx == 0)
1043 nx = 1;
1044
1045 if (nx > screen_size_x(s) - s->cx)
1046 nx = screen_size_x(s) - s->cx;
1047 if (nx == 0)
1048 return;
1049
1050 if (s->cx > screen_size_x(s) - 1)
1051 return;
1052
1053 #ifdef ENABLE_SIXEL
1054 if (image_check_line(s, s->cy, 1) && ctx->wp != NULL)
1055 ctx->wp->flags |= PANE_REDRAW;
1056 #endif
1057
1058 screen_write_initctx(ctx, &ttyctx, 0);
1059 ttyctx.bg = bg;
1060
1061 grid_view_insert_cells(s->grid, s->cx, s->cy, nx, bg);
1062
1063 screen_write_collect_flush(ctx, 0, __func__);
1064 ttyctx.num = nx;
1065 tty_write(tty_cmd_insertcharacter, &ttyctx);
1066 }
1067
1068 /* Delete nx characters. */
1069 void
1070 screen_write_deletecharacter(struct screen_write_ctx *ctx, u_int nx, u_int bg)
1071 {
1072 struct screen *s = ctx->s;
1073 struct tty_ctx ttyctx;
1074
1075 if (nx == 0)
1076 nx = 1;
1077
1078 if (nx > screen_size_x(s) - s->cx)
1079 nx = screen_size_x(s) - s->cx;
1080 if (nx == 0)
1081 return;
1082
1083 if (s->cx > screen_size_x(s) - 1)
1084 return;
1085
1086 #ifdef ENABLE_SIXEL
1087 if (image_check_line(s, s->cy, 1) && ctx->wp != NULL)
1088 ctx->wp->flags |= PANE_REDRAW;
1089 #endif
1090
1091 screen_write_initctx(ctx, &ttyctx, 0);
1092 ttyctx.bg = bg;
1093
1094 grid_view_delete_cells(s->grid, s->cx, s->cy, nx, bg);
1095
1096 screen_write_collect_flush(ctx, 0, __func__);
1097 ttyctx.num = nx;
1098 tty_write(tty_cmd_deletecharacter, &ttyctx);
1099 }
1100
1101 /* Clear nx characters. */
1102 void
1103 screen_write_clearcharacter(struct screen_write_ctx *ctx, u_int nx, u_int bg)
1104 {
1105 struct screen *s = ctx->s;
1106 struct tty_ctx ttyctx;
1107
1108 if (nx == 0)
1109 nx = 1;
1110
1111 if (nx > screen_size_x(s) - s->cx)
1112 nx = screen_size_x(s) - s->cx;
1113 if (nx == 0)
1114 return;
1115
1116 if (s->cx > screen_size_x(s) - 1)
1117 return;
1118
1119 #ifdef ENABLE_SIXEL
1120 if (image_check_line(s, s->cy, 1) && ctx->wp != NULL)
1121 ctx->wp->flags |= PANE_REDRAW;
1122 #endif
1123
1124 screen_write_initctx(ctx, &ttyctx, 0);
1125 ttyctx.bg = bg;
1126
1127 grid_view_clear(s->grid, s->cx, s->cy, nx, 1, bg);
1128
1129 screen_write_collect_flush(ctx, 0, __func__);
1130 ttyctx.num = nx;
1131 tty_write(tty_cmd_clearcharacter, &ttyctx);
1132 }
1133
1134 /* Insert ny lines. */
1135 void
1136 screen_write_insertline(struct screen_write_ctx *ctx, u_int ny, u_int bg)
1137 {
1138 struct screen *s = ctx->s;
1139 struct grid *gd = s->grid;
1140 struct tty_ctx ttyctx;
1141
1142 #ifdef ENABLE_SIXEL
1143 u_int sy = screen_size_y(s);
1144 #endif
1145
1146 if (ny == 0)
1147 ny = 1;
1148
1149 #ifdef ENABLE_SIXEL
1150 if (image_check_line(s, s->cy, sy - s->cy) && ctx->wp != NULL)
1151 ctx->wp->flags |= PANE_REDRAW;
1152 #endif
1153
1154 if (s->cy < s->rupper || s->cy > s->rlower) {
1155 if (ny > screen_size_y(s) - s->cy)
1156 ny = screen_size_y(s) - s->cy;
1157 if (ny == 0)
1158 return;
1159
1160 screen_write_initctx(ctx, &ttyctx, 1);
1161 ttyctx.bg = bg;
1162
1163 grid_view_insert_lines(gd, s->cy, ny, bg);
1164
1165 screen_write_collect_flush(ctx, 0, __func__);
1166 ttyctx.num = ny;
1167 tty_write(tty_cmd_insertline, &ttyctx);
1168 return;
1169 }
1170
1171 if (ny > s->rlower + 1 - s->cy)
1172 ny = s->rlower + 1 - s->cy;
1173 if (ny == 0)
1174 return;
1175
1176 screen_write_initctx(ctx, &ttyctx, 1);
1177 ttyctx.bg = bg;
1178
1179 if (s->cy < s->rupper || s->cy > s->rlower)
1180 grid_view_insert_lines(gd, s->cy, ny, bg);
1181 else
1182 grid_view_insert_lines_region(gd, s->rlower, s->cy, ny, bg);
1183
1184 screen_write_collect_flush(ctx, 0, __func__);
1185
1186 ttyctx.num = ny;
1187 tty_write(tty_cmd_insertline, &ttyctx);
1188 }
1189
1190 /* Delete ny lines. */
1191 void
1192 screen_write_deleteline(struct screen_write_ctx *ctx, u_int ny, u_int bg)
1193 {
1194 struct screen *s = ctx->s;
1195 struct grid *gd = s->grid;
1196 struct tty_ctx ttyctx;
1197 u_int sy = screen_size_y(s);
1198
1199 if (ny == 0)
1200 ny = 1;
1201
1202 #ifdef ENABLE_SIXEL
1203 if (image_check_line(s, s->cy, sy - s->cy) && ctx->wp != NULL)
1204 ctx->wp->flags |= PANE_REDRAW;
1205 #endif
1206
1207 if (s->cy < s->rupper || s->cy > s->rlower) {
1208 if (ny > sy - s->cy)
1209 ny = sy - s->cy;
1210 if (ny == 0)
1211 return;
1212
1213 screen_write_initctx(ctx, &ttyctx, 1);
1214 ttyctx.bg = bg;
1215
1216 grid_view_delete_lines(gd, s->cy, ny, bg);
1217
1218 screen_write_collect_flush(ctx, 0, __func__);
1219 ttyctx.num = ny;
1220 tty_write(tty_cmd_deleteline, &ttyctx);
1221 return;
1222 }
1223
1224 if (ny > s->rlower + 1 - s->cy)
1225 ny = s->rlower + 1 - s->cy;
1226 if (ny == 0)
1227 return;
1228
1229 screen_write_initctx(ctx, &ttyctx, 1);
1230 ttyctx.bg = bg;
1231
1232 if (s->cy < s->rupper || s->cy > s->rlower)
1233 grid_view_delete_lines(gd, s->cy, ny, bg);
1234 else
1235 grid_view_delete_lines_region(gd, s->rlower, s->cy, ny, bg);
1236
1237 screen_write_collect_flush(ctx, 0, __func__);
1238 ttyctx.num = ny;
1239 tty_write(tty_cmd_deleteline, &ttyctx);
1240 }
1241
1242 /* Clear line at cursor. */
1243 void
1244 screen_write_clearline(struct screen_write_ctx *ctx, u_int bg)
1245 {
1246 struct screen *s = ctx->s;
1247 struct grid_line *gl;
1248 u_int sx = screen_size_x(s);
1249 struct screen_write_citem *ci = ctx->item;
1250
1251 gl = grid_get_line(s->grid, s->grid->hsize + s->cy);
1252 if (gl->cellsize == 0 && COLOUR_DEFAULT(bg))
1253 return;
1254
1255 #ifdef ENABLE_SIXEL
1256 if (image_check_line(s, s->cy, 1) && ctx->wp != NULL)
1257 ctx->wp->flags |= PANE_REDRAW;
1258 #endif
1259
1260 grid_view_clear(s->grid, 0, s->cy, sx, 1, bg);
1261
1262 screen_write_collect_clear(ctx, s->cy, 1);
1263 ci->x = 0;
1264 ci->used = sx;
1265 ci->type = CLEAR;
1266 ci->bg = bg;
1267 TAILQ_INSERT_TAIL(&ctx->s->write_list[s->cy].items, ci, entry);
1268 ctx->item = screen_write_get_citem();
1269 }
1270
1271 /* Clear to end of line from cursor. */
1272 void
1273 screen_write_clearendofline(struct screen_write_ctx *ctx, u_int bg)
1274 {
1275 struct screen *s = ctx->s;
1276 struct grid_line *gl;
1277 u_int sx = screen_size_x(s);
1278 struct screen_write_citem *ci = ctx->item, *before;
1279
1280 if (s->cx == 0) {
1281 screen_write_clearline(ctx, bg);
1282 return;
1283 }
1284
1285 gl = grid_get_line(s->grid, s->grid->hsize + s->cy);
1286 if (s->cx > sx - 1 || (s->cx >= gl->cellsize && COLOUR_DEFAULT(bg)))
1287 return;
1288
1289 #ifdef ENABLE_SIXEL
1290 if (image_check_line(s, s->cy, 1) && ctx->wp != NULL)
1291 ctx->wp->flags |= PANE_REDRAW;
1292 #endif
1293
1294 grid_view_clear(s->grid, s->cx, s->cy, sx - s->cx, 1, bg);
1295
1296 before = screen_write_collect_trim(ctx, s->cy, s->cx, sx - s->cx, NULL);
1297 ci->x = s->cx;
1298 ci->used = sx - s->cx;
1299 ci->type = CLEAR;
1300 ci->bg = bg;
1301 if (before == NULL)
1302 TAILQ_INSERT_TAIL(&ctx->s->write_list[s->cy].items, ci, entry);
1303 else
1304 TAILQ_INSERT_BEFORE(before, ci, entry);
1305 ctx->item = screen_write_get_citem();
1306 }
1307
1308 /* Clear to start of line from cursor. */
1309 void
1310 screen_write_clearstartofline(struct screen_write_ctx *ctx, u_int bg)
1311 {
1312 struct screen *s = ctx->s;
1313 u_int sx = screen_size_x(s);
1314 struct screen_write_citem *ci = ctx->item, *before;
1315
1316 if (s->cx >= sx - 1) {
1317 screen_write_clearline(ctx, bg);
1318 return;
1319 }
1320
1321 #ifdef ENABLE_SIXEL
1322 if (image_check_line(s, s->cy, 1) && ctx->wp != NULL)
1323 ctx->wp->flags |= PANE_REDRAW;
1324 #endif
1325
1326 if (s->cx > sx - 1)
1327 grid_view_clear(s->grid, 0, s->cy, sx, 1, bg);
1328 else
1329 grid_view_clear(s->grid, 0, s->cy, s->cx + 1, 1, bg);
1330
1331 before = screen_write_collect_trim(ctx, s->cy, 0, s->cx + 1, NULL);
1332 ci->x = 0;
1333 ci->used = s->cx + 1;
1334 ci->type = CLEAR;
1335 ci->bg = bg;
1336 if (before == NULL)
1337 TAILQ_INSERT_TAIL(&ctx->s->write_list[s->cy].items, ci, entry);
1338 else
1339 TAILQ_INSERT_BEFORE(before, ci, entry);
1340 ctx->item = screen_write_get_citem();
1341 }
1342
1343 /* Move cursor to px,py. */
1344 void
1345 screen_write_cursormove(struct screen_write_ctx *ctx, int px, int py,
1346 int origin)
1347 {
1348 struct screen *s = ctx->s;
1349
1350 if (origin && py != -1 && (s->mode & MODE_ORIGIN)) {
1351 if ((u_int)py > s->rlower - s->rupper)
1352 py = s->rlower;
1353 else
1354 py += s->rupper;
1355 }
1356
1357 if (px != -1 && (u_int)px > screen_size_x(s) - 1)
1358 px = screen_size_x(s) - 1;
1359 if (py != -1 && (u_int)py > screen_size_y(s) - 1)
1360 py = screen_size_y(s) - 1;
1361
1362 log_debug("%s: from %u,%u to %u,%u", __func__, s->cx, s->cy, px, py);
1363 screen_write_set_cursor(ctx, px, py);
1364 }
1365
1366 /* Reverse index (up with scroll). */
1367 void
1368 screen_write_reverseindex(struct screen_write_ctx *ctx, u_int bg)
1369 {
1370 struct screen *s = ctx->s;
1371 struct tty_ctx ttyctx;
1372
1373 if (s->cy == s->rupper) {
1374 #ifdef ENABLE_SIXEL
1375 if (image_free_all(s) && ctx->wp != NULL)
1376 ctx->wp->flags |= PANE_REDRAW;
1377 #endif
1378
1379 grid_view_scroll_region_down(s->grid, s->rupper, s->rlower, bg);
1380 screen_write_collect_flush(ctx, 0, __func__);
1381
1382 screen_write_initctx(ctx, &ttyctx, 1);
1383 ttyctx.bg = bg;
1384
1385 tty_write(tty_cmd_reverseindex, &ttyctx);
1386 } else if (s->cy > 0)
1387 screen_write_set_cursor(ctx, -1, s->cy - 1);
1388
1389 }
1390
1391 /* Set scroll region. */
1392 void
1393 screen_write_scrollregion(struct screen_write_ctx *ctx, u_int rupper,
1394 u_int rlower)
1395 {
1396 struct screen *s = ctx->s;
1397
1398 if (rupper > screen_size_y(s) - 1)
1399 rupper = screen_size_y(s) - 1;
1400 if (rlower > screen_size_y(s) - 1)
1401 rlower = screen_size_y(s) - 1;
1402 if (rupper >= rlower) /* cannot be one line */
1403 return;
1404
1405 screen_write_collect_flush(ctx, 0, __func__);
1406
1407 /* Cursor moves to top-left. */
1408 screen_write_set_cursor(ctx, 0, 0);
1409
1410 s->rupper = rupper;
1411 s->rlower = rlower;
1412 }
1413
1414 /* Line feed. */
1415 void
1416 screen_write_linefeed(struct screen_write_ctx *ctx, int wrapped, u_int bg)
1417 {
1418 struct screen *s = ctx->s;
1419 struct grid *gd = s->grid;
1420 struct grid_line *gl;
1421 int redraw = 0;
1422 u_int rupper = s->rupper, rlower = s->rlower;
1423
1424 gl = grid_get_line(gd, gd->hsize + s->cy);
1425 if (wrapped)
1426 gl->flags |= GRID_LINE_WRAPPED;
1427
1428 log_debug("%s: at %u,%u (region %u-%u)", __func__, s->cx, s->cy,
1429 rupper, rlower);
1430
1431 if (bg != ctx->bg) {
1432 screen_write_collect_flush(ctx, 1, __func__);
1433 ctx->bg = bg;
1434 }
1435
1436 if (s->cy == s->rlower) {
1437 #ifdef ENABLE_SIXEL
1438 if (rlower == screen_size_y(s) - 1)
1439 redraw = image_scroll_up(s, 1);
1440 else
1441 redraw = image_check_line(s, rupper, rlower - rupper);
1442 if (redraw && ctx->wp != NULL)
1443 ctx->wp->flags |= PANE_REDRAW;
1444 #endif
1445 grid_view_scroll_region_up(gd, s->rupper, s->rlower, bg);
1446 screen_write_collect_scroll(ctx, bg);
1447 ctx->scrolled++;
1448 } else if (s->cy < screen_size_y(s) - 1)
1449 screen_write_set_cursor(ctx, -1, s->cy + 1);
1450 }
1451
1452 /* Scroll up. */
1453 void
1454 screen_write_scrollup(struct screen_write_ctx *ctx, u_int lines, u_int bg)
1455 {
1456 struct screen *s = ctx->s;
1457 struct grid *gd = s->grid;
1458 u_int i;
1459
1460 if (lines == 0)
1461 lines = 1;
1462 else if (lines > s->rlower - s->rupper + 1)
1463 lines = s->rlower - s->rupper + 1;
1464
1465 if (bg != ctx->bg) {
1466 screen_write_collect_flush(ctx, 1, __func__);
1467 ctx->bg = bg;
1468 }
1469
1470 #ifdef ENABLE_SIXEL
1471 if (image_scroll_up(s, lines) && ctx->wp != NULL)
1472 ctx->wp->flags |= PANE_REDRAW;
1473 #endif
1474
1475 for (i = 0; i < lines; i++) {
1476 grid_view_scroll_region_up(gd, s->rupper, s->rlower, bg);
1477 screen_write_collect_scroll(ctx, bg);
1478 }
1479 ctx->scrolled += lines;
1480 }
1481
1482 /* Scroll down. */
1483 void
1484 screen_write_scrolldown(struct screen_write_ctx *ctx, u_int lines, u_int bg)
1485 {
1486 struct screen *s = ctx->s;
1487 struct grid *gd = s->grid;
1488 struct tty_ctx ttyctx;
1489 u_int i;
1490
1491 screen_write_initctx(ctx, &ttyctx, 1);
1492 ttyctx.bg = bg;
1493
1494 if (lines == 0)
1495 lines = 1;
1496 else if (lines > s->rlower - s->rupper + 1)
1497 lines = s->rlower - s->rupper + 1;
1498
1499 #ifdef ENABLE_SIXEL
1500 if (image_free_all(s) && ctx->wp != NULL)
1501 ctx->wp->flags |= PANE_REDRAW;
1502 #endif
1503
1504 for (i = 0; i < lines; i++)
1505 grid_view_scroll_region_down(gd, s->rupper, s->rlower, bg);
1506
1507 screen_write_collect_flush(ctx, 0, __func__);
1508 ttyctx.num = lines;
1509 tty_write(tty_cmd_scrolldown, &ttyctx);
1510 }
1511
1512 /* Carriage return (cursor to start of line). */
1513 void
1514 screen_write_carriagereturn(struct screen_write_ctx *ctx)
1515 {
1516 screen_write_set_cursor(ctx, 0, -1);
1517 }
1518
1519 /* Clear to end of screen from cursor. */
1520 void
1521 screen_write_clearendofscreen(struct screen_write_ctx *ctx, u_int bg)
1522 {
1523 struct screen *s = ctx->s;
1524 struct grid *gd = s->grid;
1525 struct tty_ctx ttyctx;
1526 u_int sx = screen_size_x(s), sy = screen_size_y(s);
1527
1528 #ifdef ENABLE_SIXEL
1529 if (image_check_line(s, s->cy, sy - s->cy) && ctx->wp != NULL)
1530 ctx->wp->flags |= PANE_REDRAW;
1531 #endif
1532
1533 screen_write_initctx(ctx, &ttyctx, 1);
1534 ttyctx.bg = bg;
1535
1536 /* Scroll into history if it is enabled and clearing entire screen. */
1537 if (s->cx == 0 &&
1538 s->cy == 0 &&
1539 (gd->flags & GRID_HISTORY) &&
1540 ctx->wp != NULL &&
1541 options_get_number(ctx->wp->options, "scroll-on-clear"))
1542 grid_view_clear_history(gd, bg);
1543 else {
1544 if (s->cx <= sx - 1)
1545 grid_view_clear(gd, s->cx, s->cy, sx - s->cx, 1, bg);
1546 grid_view_clear(gd, 0, s->cy + 1, sx, sy - (s->cy + 1), bg);
1547 }
1548
1549 screen_write_collect_clear(ctx, s->cy + 1, sy - (s->cy + 1));
1550 screen_write_collect_flush(ctx, 0, __func__);
1551 tty_write(tty_cmd_clearendofscreen, &ttyctx);
1552 }
1553
1554 /* Clear to start of screen. */
1555 void
1556 screen_write_clearstartofscreen(struct screen_write_ctx *ctx, u_int bg)
1557 {
1558 struct screen *s = ctx->s;
1559 struct tty_ctx ttyctx;
1560 u_int sx = screen_size_x(s);
1561
1562 #ifdef ENABLE_SIXEL
1563 if (image_check_line(s, 0, s->cy - 1) && ctx->wp != NULL)
1564 ctx->wp->flags |= PANE_REDRAW;
1565 #endif
1566
1567 screen_write_initctx(ctx, &ttyctx, 1);
1568 ttyctx.bg = bg;
1569
1570 if (s->cy > 0)
1571 grid_view_clear(s->grid, 0, 0, sx, s->cy, bg);
1572 if (s->cx > sx - 1)
1573 grid_view_clear(s->grid, 0, s->cy, sx, 1, bg);
1574 else
1575 grid_view_clear(s->grid, 0, s->cy, s->cx + 1, 1, bg);
1576
1577 screen_write_collect_clear(ctx, 0, s->cy);
1578 screen_write_collect_flush(ctx, 0, __func__);
1579 tty_write(tty_cmd_clearstartofscreen, &ttyctx);
1580 }
1581
1582 /* Clear entire screen. */
1583 void
1584 screen_write_clearscreen(struct screen_write_ctx *ctx, u_int bg)
1585 {
1586 struct screen *s = ctx->s;
1587 struct tty_ctx ttyctx;
1588 u_int sx = screen_size_x(s), sy = screen_size_y(s);
1589
1590 #ifdef ENABLE_SIXEL
1591 if (image_free_all(s) && ctx->wp != NULL)
1592 ctx->wp->flags |= PANE_REDRAW;
1593 #endif
1594
1595 screen_write_initctx(ctx, &ttyctx, 1);
1596 ttyctx.bg = bg;
1597
1598 /* Scroll into history if it is enabled. */
1599 if ((s->grid->flags & GRID_HISTORY) &&
1600 ctx->wp != NULL &&
1601 options_get_number(ctx->wp->options, "scroll-on-clear"))
1602 grid_view_clear_history(s->grid, bg);
1603 else
1604 grid_view_clear(s->grid, 0, 0, sx, sy, bg);
1605
1606 screen_write_collect_clear(ctx, 0, sy);
1607 tty_write(tty_cmd_clearscreen, &ttyctx);
1608 }
1609
1610 /* Clear entire history. */
1611 void
1612 screen_write_clearhistory(struct screen_write_ctx *ctx)
1613 {
1614 grid_clear_history(ctx->s->grid);
1615 }
1616
1617 /* Force a full redraw. */
1618 void
1619 screen_write_fullredraw(struct screen_write_ctx *ctx)
1620 {
1621 struct tty_ctx ttyctx;
1622
1623 screen_write_collect_flush(ctx, 0, __func__);
1624
1625 screen_write_initctx(ctx, &ttyctx, 1);
1626 if (ttyctx.redraw_cb != NULL)
1627 ttyctx.redraw_cb(&ttyctx);
1628 }
1629
1630 /* Trim collected items. */
1631 static struct screen_write_citem *
1632 screen_write_collect_trim(struct screen_write_ctx *ctx, u_int y, u_int x,
1633 u_int used, int *wrapped)
1634 {
1635 struct screen_write_cline *cl = &ctx->s->write_list[y];
1636 struct screen_write_citem *ci, *ci2, *tmp, *before = NULL;
1637 u_int sx = x, ex = x + used - 1;
1638 u_int csx, cex;
1639
1640 if (TAILQ_EMPTY(&cl->items))
1641 return (NULL);
1642 TAILQ_FOREACH_SAFE(ci, &cl->items, entry, tmp) {
1643 csx = ci->x;
1644 cex = ci->x + ci->used - 1;
1645
1646 /* Item is entirely before. */
1647 if (cex < sx) {
1648 log_debug("%s: %p %u-%u before %u-%u", __func__, ci,
1649 csx, cex, sx, ex);
1650 continue;
1651 }
1652
1653 /* Item is entirely after. */
1654 if (csx > ex) {
1655 log_debug("%s: %p %u-%u after %u-%u", __func__, ci,
1656 csx, cex, sx, ex);
1657 before = ci;
1658 break;
1659 }
1660
1661 /* Item is entirely inside. */
1662 if (csx >= sx && cex <= ex) {
1663 log_debug("%s: %p %u-%u inside %u-%u", __func__, ci,
1664 csx, cex, sx, ex);
1665 TAILQ_REMOVE(&cl->items, ci, entry);
1666 screen_write_free_citem(ci);
1667 if (csx == 0 && ci->wrapped && wrapped != NULL)
1668 *wrapped = 1;
1669 continue;
1670 }
1671
1672 /* Item under the start. */
1673 if (csx < sx && cex >= sx && cex <= ex) {
1674 log_debug("%s: %p %u-%u start %u-%u", __func__, ci,
1675 csx, cex, sx, ex);
1676 ci->used = sx - csx;
1677 log_debug("%s: %p now %u-%u", __func__, ci, ci->x,
1678 ci->x + ci->used + 1);
1679 continue;
1680 }
1681
1682 /* Item covers the end. */
1683 if (cex > ex && csx >= sx && csx <= ex) {
1684 log_debug("%s: %p %u-%u end %u-%u", __func__, ci,
1685 csx, cex, sx, ex);
1686 ci->x = ex + 1;
1687 ci->used = cex - ex;
1688 log_debug("%s: %p now %u-%u", __func__, ci, ci->x,
1689 ci->x + ci->used + 1);
1690 before = ci;
1691 break;
1692 }
1693
1694 /* Item must cover both sides. */
1695 log_debug("%s: %p %u-%u under %u-%u", __func__, ci,
1696 csx, cex, sx, ex);
1697 ci2 = screen_write_get_citem();
1698 ci2->type = ci->type;
1699 ci2->bg = ci->bg;
1700 memcpy(&ci2->gc, &ci->gc, sizeof ci2->gc);
1701 TAILQ_INSERT_AFTER(&cl->items, ci, ci2, entry);
1702
1703 ci->used = sx - csx;
1704 ci2->x = ex + 1;
1705 ci2->used = cex - ex;
1706
1707 log_debug("%s: %p now %u-%u (%p) and %u-%u (%p)", __func__, ci,
1708 ci->x, ci->x + ci->used - 1, ci, ci2->x,
1709 ci2->x + ci2->used - 1, ci2);
1710 before = ci2;
1711 break;
1712 }
1713 return (before);
1714 }
1715
1716 /* Clear collected lines. */
1717 static void
1718 screen_write_collect_clear(struct screen_write_ctx *ctx, u_int y, u_int n)
1719 {
1720 struct screen_write_cline *cl;
1721 u_int i;
1722
1723 for (i = y; i < y + n; i++) {
1724 cl = &ctx->s->write_list[i];
1725 TAILQ_CONCAT(&screen_write_citem_freelist, &cl->items, entry);
1726 }
1727 }
1728
1729 /* Scroll collected lines up. */
1730 static void
1731 screen_write_collect_scroll(struct screen_write_ctx *ctx, u_int bg)
1732 {
1733 struct screen *s = ctx->s;
1734 struct screen_write_cline *cl;
1735 u_int y;
1736 char *saved;
1737 struct screen_write_citem *ci;
1738
1739 log_debug("%s: at %u,%u (region %u-%u)", __func__, s->cx, s->cy,
1740 s->rupper, s->rlower);
1741
1742 screen_write_collect_clear(ctx, s->rupper, 1);
1743 saved = ctx->s->write_list[s->rupper].data;
1744 for (y = s->rupper; y < s->rlower; y++) {
1745 cl = &ctx->s->write_list[y + 1];
1746 TAILQ_CONCAT(&ctx->s->write_list[y].items, &cl->items, entry);
1747 ctx->s->write_list[y].data = cl->data;
1748 }
1749 ctx->s->write_list[s->rlower].data = saved;
1750
1751 ci = screen_write_get_citem();
1752 ci->x = 0;
1753 ci->used = screen_size_x(s);
1754 ci->type = CLEAR;
1755 ci->bg = bg;
1756 TAILQ_INSERT_TAIL(&ctx->s->write_list[s->rlower].items, ci, entry);
1757 }
1758
1759 /* Flush collected lines. */
1760 static void
1761 screen_write_collect_flush(struct screen_write_ctx *ctx, int scroll_only,
1762 const char *from)
1763 {
1764 struct screen *s = ctx->s;
1765 struct screen_write_citem *ci, *tmp;
1766 struct screen_write_cline *cl;
1767 u_int y, cx, cy, last, items = 0;
1768 struct tty_ctx ttyctx;
1769
1770 if (ctx->scrolled != 0) {
1771 log_debug("%s: scrolled %u (region %u-%u)", __func__,
1772 ctx->scrolled, s->rupper, s->rlower);
1773 if (ctx->scrolled > s->rlower - s->rupper + 1)
1774 ctx->scrolled = s->rlower - s->rupper + 1;
1775
1776 screen_write_initctx(ctx, &ttyctx, 1);
1777 ttyctx.num = ctx->scrolled;
1778 ttyctx.bg = ctx->bg;
1779 tty_write(tty_cmd_scrollup, &ttyctx);
1780 }
1781 ctx->scrolled = 0;
1782 ctx->bg = 8;
1783
1784 if (scroll_only)
1785 return;
1786
1787 cx = s->cx; cy = s->cy;
1788 for (y = 0; y < screen_size_y(s); y++) {
1789 cl = &ctx->s->write_list[y];
1790 last = UINT_MAX;
1791 TAILQ_FOREACH_SAFE(ci, &cl->items, entry, tmp) {
1792 if (last != UINT_MAX && ci->x <= last) {
1793 fatalx("collect list not in order: %u <= %u",
1794 ci->x, last);
1795 }
1796 screen_write_set_cursor(ctx, ci->x, y);
1797 if (ci->type == CLEAR) {
1798 screen_write_initctx(ctx, &ttyctx, 1);
1799 ttyctx.bg = ci->bg;
1800 ttyctx.num = ci->used;
1801 tty_write(tty_cmd_clearcharacter, &ttyctx);
1802 } else {
1803 screen_write_initctx(ctx, &ttyctx, 0);
1804 ttyctx.cell = &ci->gc;
1805 ttyctx.wrapped = ci->wrapped;
1806 ttyctx.ptr = cl->data + ci->x;
1807 ttyctx.num = ci->used;
1808 tty_write(tty_cmd_cells, &ttyctx);
1809 }
1810 items++;
1811
1812 TAILQ_REMOVE(&cl->items, ci, entry);
1813 screen_write_free_citem(ci);
1814 last = ci->x;
1815 }
1816 }
1817 s->cx = cx; s->cy = cy;
1818
1819 log_debug("%s: flushed %u items (%s)", __func__, items, from);
1820 }
1821
1822 /* Finish and store collected cells. */
1823 void
1824 screen_write_collect_end(struct screen_write_ctx *ctx)
1825 {
1826 struct screen *s = ctx->s;
1827 struct screen_write_citem *ci = ctx->item, *before;
1828 struct screen_write_cline *cl = &s->write_list[s->cy];
1829 struct grid_cell gc;
1830 u_int xx;
1831 int wrapped = ci->wrapped;
1832
1833 if (ci->used == 0)
1834 return;
1835 ctx->flags &= ~SCREEN_WRITE_COMBINE;
1836
1837 before = screen_write_collect_trim(ctx, s->cy, s->cx, ci->used,
1838 &wrapped);
1839 ci->x = s->cx;
1840 ci->wrapped = wrapped;
1841 if (before == NULL)
1842 TAILQ_INSERT_TAIL(&cl->items, ci, entry);
1843 else
1844 TAILQ_INSERT_BEFORE(before, ci, entry);
1845 ctx->item = screen_write_get_citem();
1846
1847 log_debug("%s: %u %.*s (at %u,%u)", __func__, ci->used,
1848 (int)ci->used, cl->data + ci->x, s->cx, s->cy);
1849
1850 if (s->cx != 0) {
1851 for (xx = s->cx; xx > 0; xx--) {
1852 grid_view_get_cell(s->grid, xx, s->cy, &gc);
1853 if (~gc.flags & GRID_FLAG_PADDING)
1854 break;
1855 grid_view_set_cell(s->grid, xx, s->cy,
1856 &grid_default_cell);
1857 }
1858 if (gc.data.width > 1) {
1859 grid_view_set_cell(s->grid, xx, s->cy,
1860 &grid_default_cell);
1861 }
1862 }
1863
1864 #ifdef ENABLE_SIXEL
1865 if (image_check_area(s, s->cx, s->cy, ci->used, 1) && ctx->wp != NULL)
1866 ctx->wp->flags |= PANE_REDRAW;
1867 #endif
1868
1869 grid_view_set_cells(s->grid, s->cx, s->cy, &ci->gc, cl->data + ci->x,
1870 ci->used);
1871 screen_write_set_cursor(ctx, s->cx + ci->used, -1);
1872
1873 for (xx = s->cx; xx < screen_size_x(s); xx++) {
1874 grid_view_get_cell(s->grid, xx, s->cy, &gc);
1875 if (~gc.flags & GRID_FLAG_PADDING)
1876 break;
1877 grid_view_set_cell(s->grid, xx, s->cy, &grid_default_cell);
1878 }
1879 }
1880
1881 /* Write cell data, collecting if necessary. */
1882 void
1883 screen_write_collect_add(struct screen_write_ctx *ctx,
1884 const struct grid_cell *gc)
1885 {
1886 struct screen *s = ctx->s;
1887 struct screen_write_citem *ci;
1888 u_int sx = screen_size_x(s);
1889 int collect;
1890
1891 /*
1892 * Don't need to check that the attributes and whatnot are still the
1893 * same - input_parse will end the collection when anything that isn't
1894 * a plain character is encountered.
1895 */
1896
1897 collect = 1;
1898 if (gc->data.width != 1 || gc->data.size != 1 || *gc->data.data >= 0x7f)
1899 collect = 0;
1900 else if (gc->attr & GRID_ATTR_CHARSET)
1901 collect = 0;
1902 else if (~s->mode & MODE_WRAP)
1903 collect = 0;
1904 else if (s->mode & MODE_INSERT)
1905 collect = 0;
1906 else if (s->sel != NULL)
1907 collect = 0;
1908 if (!collect) {
1909 screen_write_collect_end(ctx);
1910 screen_write_collect_flush(ctx, 0, __func__);
1911 screen_write_cell(ctx, gc);
1912 return;
1913 }
1914
1915 if (s->cx > sx - 1 || ctx->item->used > sx - 1 - s->cx)
1916 screen_write_collect_end(ctx);
1917 ci = ctx->item; /* may have changed */
1918
1919 if (s->cx > sx - 1) {
1920 log_debug("%s: wrapped at %u,%u", __func__, s->cx, s->cy);
1921 ci->wrapped = 1;
1922 screen_write_linefeed(ctx, 1, 8);
1923 screen_write_set_cursor(ctx, 0, -1);
1924 }
1925
1926 if (ci->used == 0)
1927 memcpy(&ci->gc, gc, sizeof ci->gc);
1928 if (ctx->s->write_list[s->cy].data == NULL)
1929 ctx->s->write_list[s->cy].data = xmalloc(screen_size_x(ctx->s));
1930 ctx->s->write_list[s->cy].data[s->cx + ci->used++] = gc->data.data[0];
1931 }
1932
1933 /* Write cell data. */
1934 void
1935 screen_write_cell(struct screen_write_ctx *ctx, const struct grid_cell *gc)
1936 {
1937 struct screen *s = ctx->s;
1938 struct grid *gd = s->grid;
1939 struct grid_cell copy;
1940 const struct utf8_data *ud = &gc->data, *previous = NULL, *combine;
1941 struct grid_line *gl;
1942 struct grid_cell_entry *gce;
1943 struct grid_cell tmp_gc, now_gc;
1944 struct tty_ctx ttyctx;
1945 u_int sx = screen_size_x(s), sy = screen_size_y(s);
1946 u_int width = ud->width, xx, last, cx, cy;
1947 int selected, skip = 1;
1948
1949 /* Ignore padding cells. */
1950 if (gc->flags & GRID_FLAG_PADDING)
1951 return;
1952
1953 /* Check if this cell needs to be combined with the previous cell. */
1954 if (ctx->flags & SCREEN_WRITE_COMBINE)
1955 previous = &ctx->previous;
1956 switch (utf8_try_combined(ud, previous, &combine, &width)) {
1957 case UTF8_DISCARD_NOW:
1958 log_debug("%s: UTF8_DISCARD_NOW (width %u)", __func__, width);
1959 ctx->flags &= ~SCREEN_WRITE_COMBINE;
1960 return;
1961 case UTF8_WRITE_NOW:
1962 log_debug("%s: UTF8_WRITE_NOW (width %u)", __func__, width);
1963 ctx->flags &= ~SCREEN_WRITE_COMBINE;
1964 break;
1965 case UTF8_COMBINE_NOW:
1966 log_debug("%s: UTF8_COMBINE_NOW (width %u)", __func__, width);
1967 screen_write_collect_flush(ctx, 0, __func__);
1968 gc = screen_write_combine(ctx, combine, &xx, &cx);
1969 if (gc != NULL) {
1970 cx = s->cx; cy = s->cy;
1971 screen_write_set_cursor(ctx, xx, s->cy);
1972 screen_write_initctx(ctx, &ttyctx, 0);
1973 ttyctx.cell = gc;
1974 tty_write(tty_cmd_cell, &ttyctx);
1975 s->cx = cx; s->cy = cy;
1976 }
1977 ctx->flags &= ~SCREEN_WRITE_COMBINE;
1978 return;
1979 case UTF8_WRITE_MAYBE_COMBINE:
1980 log_debug("%s: UTF8_WRITE_MAYBE_COMBINE (width %u)", __func__,
1981 width);
1982 utf8_copy(&ctx->previous, ud);
1983 ctx->flags |= SCREEN_WRITE_COMBINE;
1984 break;
1985 case UTF8_DISCARD_MAYBE_COMBINE:
1986 log_debug("%s: UTF8_DISCARD_MAYBE_COMBINE (width %u)", __func__,
1987 width);
1988 utf8_copy(&ctx->previous, ud);
1989 ctx->flags |= SCREEN_WRITE_COMBINE;
1990 return;
1991 }
1992 if (width != ud->width) {
1993 memcpy(&copy, gc, sizeof copy);
1994 copy.data.width = width;
1995 gc = &copy;
1996 }
1997 ud = NULL;
1998
1999 /* Flush any existing scrolling. */
2000 screen_write_collect_flush(ctx, 1, __func__);
2001
2002 /* If this character doesn't fit, ignore it. */
2003 if ((~s->mode & MODE_WRAP) &&
2004 width > 1 &&
2005 (width > sx || (s->cx != sx && s->cx > sx - width)))
2006 return;
2007
2008 /* If in insert mode, make space for the cells. */
2009 if (s->mode & MODE_INSERT) {
2010 grid_view_insert_cells(s->grid, s->cx, s->cy, width, 8);
2011 skip = 0;
2012 }
2013
2014 /* Check this will fit on the current line and wrap if not. */
2015 if ((s->mode & MODE_WRAP) && s->cx > sx - width) {
2016 log_debug("%s: wrapped at %u,%u", __func__, s->cx, s->cy);
2017 screen_write_linefeed(ctx, 1, 8);
2018 screen_write_set_cursor(ctx, 0, -1);
2019 screen_write_collect_flush(ctx, 1, __func__);
2020 }
2021
2022 /* Sanity check cursor position. */
2023 if (s->cx > sx - width || s->cy > sy - 1)
2024 return;
2025 screen_write_initctx(ctx, &ttyctx, 0);
2026
2027 /* Handle overwriting of UTF-8 characters. */
2028 gl = grid_get_line(s->grid, s->grid->hsize + s->cy);
2029 if (gl->flags & GRID_LINE_EXTENDED) {
2030 grid_view_get_cell(gd, s->cx, s->cy, &now_gc);
2031 if (screen_write_overwrite(ctx, &now_gc, width))
2032 skip = 0;
2033 }
2034
2035 /*
2036 * If the new character is UTF-8 wide, fill in padding cells. Have
2037 * already ensured there is enough room.
2038 */
2039 for (xx = s->cx + 1; xx < s->cx + width; xx++) {
2040 log_debug("%s: new padding at %u,%u", __func__, xx, s->cy);
2041 grid_view_set_padding(gd, xx, s->cy);
2042 skip = 0;
2043 }
2044
2045 /* If no change, do not draw. */
2046 if (skip) {
2047 if (s->cx >= gl->cellsize)
2048 skip = grid_cells_equal(gc, &grid_default_cell);
2049 else {
2050 gce = &gl->celldata[s->cx];
2051 if (gce->flags & GRID_FLAG_EXTENDED)
2052 skip = 0;
2053 else if (gc->flags != gce->flags)
2054 skip = 0;
2055 else if (gc->attr != gce->data.attr)
2056 skip = 0;
2057 else if (gc->fg != gce->data.fg)
2058 skip = 0;
2059 else if (gc->bg != gce->data.bg)
2060 skip = 0;
2061 else if (gc->data.width != 1)
2062 skip = 0;
2063 else if (gc->data.size != 1)
2064 skip = 0;
2065 else if (gce->data.data != gc->data.data[0])
2066 skip = 0;
2067 }
2068 }
2069
2070 /* Update the selected flag and set the cell. */
2071 selected = screen_check_selection(s, s->cx, s->cy);
2072 if (selected && (~gc->flags & GRID_FLAG_SELECTED)) {
2073 memcpy(&tmp_gc, gc, sizeof tmp_gc);
2074 tmp_gc.flags |= GRID_FLAG_SELECTED;
2075 grid_view_set_cell(gd, s->cx, s->cy, &tmp_gc);
2076 } else if (!selected && (gc->flags & GRID_FLAG_SELECTED)) {
2077 memcpy(&tmp_gc, gc, sizeof tmp_gc);
2078 tmp_gc.flags &= ~GRID_FLAG_SELECTED;
2079 grid_view_set_cell(gd, s->cx, s->cy, &tmp_gc);
2080 } else if (!skip)
2081 grid_view_set_cell(gd, s->cx, s->cy, gc);
2082 if (selected)
2083 skip = 0;
2084
2085 /*
2086 * Move the cursor. If not wrapping, stick at the last character and
2087 * replace it.
2088 */
2089 last = !(s->mode & MODE_WRAP);
2090 if (s->cx <= sx - last - width)
2091 screen_write_set_cursor(ctx, s->cx + width, -1);
2092 else
2093 screen_write_set_cursor(ctx, sx - last, -1);
2094
2095 /* Create space for character in insert mode. */
2096 if (s->mode & MODE_INSERT) {
2097 screen_write_collect_flush(ctx, 0, __func__);
2098 ttyctx.num = width;
2099 tty_write(tty_cmd_insertcharacter, &ttyctx);
2100 }
2101
2102 /* Write to the screen. */
2103 if (!skip) {
2104 if (selected) {
2105 screen_select_cell(s, &tmp_gc, gc);
2106 ttyctx.cell = &tmp_gc;
2107 } else
2108 ttyctx.cell = gc;
2109 tty_write(tty_cmd_cell, &ttyctx);
2110 }
2111 }
2112
2113 /* Combine a UTF-8 zero-width character onto the previous. */
2114 static const struct grid_cell *
2115 screen_write_combine(struct screen_write_ctx *ctx, const struct utf8_data *ud,
2116 u_int *xx, u_int *cx)
2117 {
2118 struct screen *s = ctx->s;
2119 struct grid *gd = s->grid;
2120 static struct grid_cell gc;
2121 u_int n, width;
2122
2123 /* Can't combine if at 0. */
2124 if (s->cx == 0) {
2125 *xx = 0;
2126 return (NULL);
2127 }
2128 *xx = s->cx;
2129
2130 /* Empty data is out. */
2131 if (ud->size == 0)
2132 fatalx("UTF-8 data empty");
2133
2134 /* Retrieve the previous cell. */
2135 for (n = 1; n <= s->cx; n++) {
2136 grid_view_get_cell(gd, s->cx - n, s->cy, &gc);
2137 if (~gc.flags & GRID_FLAG_PADDING)
2138 break;
2139 }
2140 if (n > s->cx)
2141 return (NULL);
2142
2143 /* Check there is enough space. */
2144 if (gc.data.size + ud->size > sizeof gc.data.data)
2145 return (NULL);
2146 (*xx) -= n;
2147
2148 log_debug("%s: %.*s onto %.*s at %u,%u (width %u)", __func__,
2149 (int)ud->size, ud->data, (int)gc.data.size, gc.data.data, *xx,
2150 s->cy, gc.data.width);
2151
2152 /* Append the data. */
2153 memcpy(gc.data.data + gc.data.size, ud->data, ud->size);
2154 gc.data.size += ud->size;
2155 width = gc.data.width;
2156
2157 /* If this is U+FE0F VARIATION SELECTOR-16, force the width to 2. */
2158 if (gc.data.width == 1 &&
2159 ud->size == 3 &&
2160 memcmp(ud->data, "\357\270\217", 3) == 0) {
2161 grid_view_set_padding(gd, (*xx) + 1, s->cy);
2162 gc.data.width = 2;
2163 width += 2;
2164 }
2165
2166 /* Set the new cell. */
2167 grid_view_set_cell(gd, *xx, s->cy, &gc);
2168
2169 *cx = (*xx) + width;
2170 log_debug("%s: character at %u; cursor at %u", __func__, *xx, *cx);
2171 return (&gc);
2172 }
2173
2174 /*
2175 * UTF-8 wide characters are a bit of an annoyance. They take up more than one
2176 * cell on the screen, so following cells must not be drawn by marking them as
2177 * padding.
2178 *
2179 * So far, so good. The problem is, when overwriting a padding cell, or a UTF-8
2180 * character, it is necessary to also overwrite any other cells which covered
2181 * by the same character.
2182 */
2183 static int
2184 screen_write_overwrite(struct screen_write_ctx *ctx, struct grid_cell *gc,
2185 u_int width)
2186 {
2187 struct screen *s = ctx->s;
2188 struct grid *gd = s->grid;
2189 struct grid_cell tmp_gc;
2190 u_int xx;
2191 int done = 0;
2192
2193 if (gc->flags & GRID_FLAG_PADDING) {
2194 /*
2195 * A padding cell, so clear any following and leading padding
2196 * cells back to the character. Don't overwrite the current
2197 * cell as that happens later anyway.
2198 */
2199 xx = s->cx + 1;
2200 while (--xx > 0) {
2201 grid_view_get_cell(gd, xx, s->cy, &tmp_gc);
2202 if (~tmp_gc.flags & GRID_FLAG_PADDING)
2203 break;
2204 log_debug("%s: padding at %u,%u", __func__, xx, s->cy);
2205 grid_view_set_cell(gd, xx, s->cy, &grid_default_cell);
2206 }
2207
2208 /* Overwrite the character at the start of this padding. */
2209 log_debug("%s: character at %u,%u", __func__, xx, s->cy);
2210 grid_view_set_cell(gd, xx, s->cy, &grid_default_cell);
2211 done = 1;
2212 }
2213
2214 /*
2215 * Overwrite any padding cells that belong to any UTF-8 characters
2216 * we'll be overwriting with the current character.
2217 */
2218 if (width != 1 ||
2219 gc->data.width != 1 ||
2220 gc->flags & GRID_FLAG_PADDING) {
2221 xx = s->cx + width - 1;
2222 while (++xx < screen_size_x(s)) {
2223 grid_view_get_cell(gd, xx, s->cy, &tmp_gc);
2224 if (~tmp_gc.flags & GRID_FLAG_PADDING)
2225 break;
2226 log_debug("%s: overwrite at %u,%u", __func__, xx,
2227 s->cy);
2228 grid_view_set_cell(gd, xx, s->cy, &grid_default_cell);
2229 done = 1;
2230 }
2231 }
2232
2233 return (done);
2234 }
2235
2236 /* Set external clipboard. */
2237 void
2238 screen_write_setselection(struct screen_write_ctx *ctx, const char *flags,
2239 u_char *str, u_int len)
2240 {
2241 struct tty_ctx ttyctx;
2242
2243 screen_write_initctx(ctx, &ttyctx, 0);
2244 ttyctx.ptr = str;
2245 ttyctx.ptr2 = (void *)flags;
2246 ttyctx.num = len;
2247
2248 tty_write(tty_cmd_setselection, &ttyctx);
2249 }
2250
2251 /* Write unmodified string. */
2252 void
2253 screen_write_rawstring(struct screen_write_ctx *ctx, u_char *str, u_int len,
2254 int allow_invisible_panes)
2255 {
2256 struct tty_ctx ttyctx;
2257
2258 screen_write_initctx(ctx, &ttyctx, 0);
2259 ttyctx.ptr = str;
2260 ttyctx.num = len;
2261 ttyctx.allow_invisible_panes = allow_invisible_panes;
2262
2263 tty_write(tty_cmd_rawstring, &ttyctx);
2264 }
2265
2266 #ifdef ENABLE_SIXEL
2267 /* Write a SIXEL image. */
2268 void
2269 screen_write_sixelimage(struct screen_write_ctx *ctx, struct sixel_image *si,
2270 u_int bg)
2271 {
2272 struct screen *s = ctx->s;
2273 struct grid *gd = s->grid;
2274 struct tty_ctx ttyctx;
2275 u_int x, y, sx, sy, cx = s->cx, cy = s->cy, i, lines;
2276 struct sixel_image *new;
2277
2278 sixel_size_in_cells(si, &x, &y);
2279 if (x > screen_size_x(s) || y > screen_size_y(s)) {
2280 if (x > screen_size_x(s) - cx)
2281 sx = screen_size_x(s) - cx;
2282 else
2283 sx = x;
2284 if (y > screen_size_y(s) - 1)
2285 sy = screen_size_y(s) - 1;
2286 else
2287 sy = y;
2288 new = sixel_scale(si, 0, 0, 0, y - sy, sx, sy, 1);
2289 sixel_free(si);
2290 si = new;
2291 sixel_size_in_cells(si, &x, &y);
2292 }
2293
2294 sy = screen_size_y(s) - cy;
2295 if (sy < y) {
2296 lines = y - sy + 1;
2297 if (image_scroll_up(s, lines) && ctx->wp != NULL)
2298 ctx->wp->flags |= PANE_REDRAW;
2299 for (i = 0; i < lines; i++) {
2300 grid_view_scroll_region_up(gd, 0, screen_size_y(s) - 1,
2301 bg);
2302 screen_write_collect_scroll(ctx, bg);
2303 }
2304 ctx->scrolled += lines;
2305 if (lines > cy)
2306 screen_write_cursormove(ctx, -1, 0, 0);
2307 else
2308 screen_write_cursormove(ctx, -1, cy - lines, 0);
2309 }
2310 screen_write_collect_flush(ctx, 0, __func__);
2311
2312 screen_write_initctx(ctx, &ttyctx, 0);
2313 ttyctx.ptr = image_store(s, si);
2314
2315 tty_write(tty_cmd_sixelimage, &ttyctx);
2316
2317 screen_write_cursormove(ctx, 0, cy + y, 0);
2318 }
2319 #endif
2320
2321 /* Turn alternate screen on. */
2322 void
2323 screen_write_alternateon(struct screen_write_ctx *ctx, struct grid_cell *gc,
2324 int cursor)
2325 {
2326 struct tty_ctx ttyctx;
2327 struct window_pane *wp = ctx->wp;
2328
2329 if (wp != NULL && !options_get_number(wp->options, "alternate-screen"))
2330 return;
2331
2332 screen_write_collect_flush(ctx, 0, __func__);
2333 screen_alternate_on(ctx->s, gc, cursor);
2334
2335 screen_write_initctx(ctx, &ttyctx, 1);
2336 if (ttyctx.redraw_cb != NULL)
2337 ttyctx.redraw_cb(&ttyctx);
2338 }
2339
2340 /* Turn alternate screen off. */
2341 void
2342 screen_write_alternateoff(struct screen_write_ctx *ctx, struct grid_cell *gc,
2343 int cursor)
2344 {
2345 struct tty_ctx ttyctx;
2346 struct window_pane *wp = ctx->wp;
2347
2348 if (wp != NULL && !options_get_number(wp->options, "alternate-screen"))
2349 return;
2350
2351 screen_write_collect_flush(ctx, 0, __func__);
2352 screen_alternate_off(ctx->s, gc, cursor);
2353
2354 screen_write_initctx(ctx, &ttyctx, 1);
2355 if (ttyctx.redraw_cb != NULL)
2356 ttyctx.redraw_cb(&ttyctx);
2357 }
tmux -- terminal multiplexer similar to GNU Screen