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Merge branch 'obsd-master'
[tmux.git] / screen-write.c
blobbce56b8e2e953961bc504e560b67741e5431979f
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 int screen_write_combine(struct screen_write_ctx *,
36 const struct grid_cell *);
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|PANE_REDRAWSCROLLBAR);
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
330 if (options_get_number(global_options, "extended-keys") == 2)
331 s->mode = (s->mode & ~EXTENDED_KEY_MODES)|MODE_KEYS_EXTENDED;
332
333 screen_write_clearscreen(ctx, 8);
334 screen_write_set_cursor(ctx, 0, 0);
335 }
336
337 /* Write character. */
338 void
339 screen_write_putc(struct screen_write_ctx *ctx, const struct grid_cell *gcp,
340 u_char ch)
341 {
342 struct grid_cell gc;
343
344 memcpy(&gc, gcp, sizeof gc);
345
346 utf8_set(&gc.data, ch);
347 screen_write_cell(ctx, &gc);
348 }
349
350 /* Calculate string length. */
351 size_t
352 screen_write_strlen(const char *fmt, ...)
353 {
354 va_list ap;
355 char *msg;
356 struct utf8_data ud;
357 u_char *ptr;
358 size_t left, size = 0;
359 enum utf8_state more;
360
361 va_start(ap, fmt);
362 xvasprintf(&msg, fmt, ap);
363 va_end(ap);
364
365 ptr = msg;
366 while (*ptr != '\0') {
367 if (*ptr > 0x7f && utf8_open(&ud, *ptr) == UTF8_MORE) {
368 ptr++;
369
370 left = strlen(ptr);
371 if (left < (size_t)ud.size - 1)
372 break;
373 while ((more = utf8_append(&ud, *ptr)) == UTF8_MORE)
374 ptr++;
375 ptr++;
376
377 if (more == UTF8_DONE)
378 size += ud.width;
379 } else {
380 if (*ptr == '\t' || (*ptr > 0x1f && *ptr < 0x7f))
381 size++;
382 ptr++;
383 }
384 }
385
386 free(msg);
387 return (size);
388 }
389
390 /* Write string wrapped over lines. */
391 int
392 screen_write_text(struct screen_write_ctx *ctx, u_int cx, u_int width,
393 u_int lines, int more, const struct grid_cell *gcp, const char *fmt, ...)
394 {
395 struct screen *s = ctx->s;
396 va_list ap;
397 char *tmp;
398 u_int cy = s->cy, i, end, next, idx = 0, at, left;
399 struct utf8_data *text;
400 struct grid_cell gc;
401
402 memcpy(&gc, gcp, sizeof gc);
403
404 va_start(ap, fmt);
405 xvasprintf(&tmp, fmt, ap);
406 va_end(ap);
407
408 text = utf8_fromcstr(tmp);
409 free(tmp);
410
411 left = (cx + width) - s->cx;
412 for (;;) {
413 /* Find the end of what can fit on the line. */
414 at = 0;
415 for (end = idx; text[end].size != 0; end++) {
416 if (text[end].size == 1 && text[end].data[0] == '\n')
417 break;
418 if (at + text[end].width > left)
419 break;
420 at += text[end].width;
421 }
422
423 /*
424 * If we're on a space, that's the end. If not, walk back to
425 * try and find one.
426 */
427 if (text[end].size == 0)
428 next = end;
429 else if (text[end].size == 1 && text[end].data[0] == '\n')
430 next = end + 1;
431 else if (text[end].size == 1 && text[end].data[0] == ' ')
432 next = end + 1;
433 else {
434 for (i = end; i > idx; i--) {
435 if (text[i].size == 1 && text[i].data[0] == ' ')
436 break;
437 }
438 if (i != idx) {
439 next = i + 1;
440 end = i;
441 } else
442 next = end;
443 }
444
445 /* Print the line. */
446 for (i = idx; i < end; i++) {
447 utf8_copy(&gc.data, &text[i]);
448 screen_write_cell(ctx, &gc);
449 }
450
451 /* If at the bottom, stop. */
452 idx = next;
453 if (s->cy == cy + lines - 1 || text[idx].size == 0)
454 break;
455
456 screen_write_cursormove(ctx, cx, s->cy + 1, 0);
457 left = width;
458 }
459
460 /*
461 * Fail if on the last line and there is more to come or at the end, or
462 * if the text was not entirely consumed.
463 */
464 if ((s->cy == cy + lines - 1 && (!more || s->cx == cx + width)) ||
465 text[idx].size != 0) {
466 free(text);
467 return (0);
468 }
469 free(text);
470
471 /*
472 * If no more to come, move to the next line. Otherwise, leave on
473 * the same line (except if at the end).
474 */
475 if (!more || s->cx == cx + width)
476 screen_write_cursormove(ctx, cx, s->cy + 1, 0);
477 return (1);
478 }
479
480 /* Write simple string (no maximum length). */
481 void
482 screen_write_puts(struct screen_write_ctx *ctx, const struct grid_cell *gcp,
483 const char *fmt, ...)
484 {
485 va_list ap;
486
487 va_start(ap, fmt);
488 screen_write_vnputs(ctx, -1, gcp, fmt, ap);
489 va_end(ap);
490 }
491
492 /* Write string with length limit (-1 for unlimited). */
493 void
494 screen_write_nputs(struct screen_write_ctx *ctx, ssize_t maxlen,
495 const struct grid_cell *gcp, const char *fmt, ...)
496 {
497 va_list ap;
498
499 va_start(ap, fmt);
500 screen_write_vnputs(ctx, maxlen, gcp, fmt, ap);
501 va_end(ap);
502 }
503
504 void
505 screen_write_vnputs(struct screen_write_ctx *ctx, ssize_t maxlen,
506 const struct grid_cell *gcp, const char *fmt, va_list ap)
507 {
508 struct grid_cell gc;
509 struct utf8_data *ud = &gc.data;
510 char *msg;
511 u_char *ptr;
512 size_t left, size = 0;
513 enum utf8_state more;
514
515 memcpy(&gc, gcp, sizeof gc);
516 xvasprintf(&msg, fmt, ap);
517
518 ptr = msg;
519 while (*ptr != '\0') {
520 if (*ptr > 0x7f && utf8_open(ud, *ptr) == UTF8_MORE) {
521 ptr++;
522
523 left = strlen(ptr);
524 if (left < (size_t)ud->size - 1)
525 break;
526 while ((more = utf8_append(ud, *ptr)) == UTF8_MORE)
527 ptr++;
528 ptr++;
529
530 if (more != UTF8_DONE)
531 continue;
532 if (maxlen > 0 && size + ud->width > (size_t)maxlen) {
533 while (size < (size_t)maxlen) {
534 screen_write_putc(ctx, &gc, ' ');
535 size++;
536 }
537 break;
538 }
539 size += ud->width;
540 screen_write_cell(ctx, &gc);
541 } else {
542 if (maxlen > 0 && size + 1 > (size_t)maxlen)
543 break;
544
545 if (*ptr == '\001')
546 gc.attr ^= GRID_ATTR_CHARSET;
547 else if (*ptr == '\n') {
548 screen_write_linefeed(ctx, 0, 8);
549 screen_write_carriagereturn(ctx);
550 } else if (*ptr == '\t' || (*ptr > 0x1f && *ptr < 0x7f)) {
551 size++;
552 screen_write_putc(ctx, &gc, *ptr);
553 }
554 ptr++;
555 }
556 }
557
558 free(msg);
559 }
560
561 /*
562 * Copy from another screen but without the selection stuff. Assumes the target
563 * region is already big enough.
564 */
565 void
566 screen_write_fast_copy(struct screen_write_ctx *ctx, struct screen *src,
567 u_int px, u_int py, u_int nx, u_int ny)
568 {
569 struct screen *s = ctx->s;
570 struct window_pane *wp = ctx->wp;
571 struct tty_ctx ttyctx;
572 struct grid *gd = src->grid;
573 struct grid_cell gc;
574 u_int xx, yy, cx = s->cx, cy = s->cy;
575
576 if (nx == 0 || ny == 0)
577 return;
578
579 cy = s->cy;
580 for (yy = py; yy < py + ny; yy++) {
581 if (yy >= gd->hsize + gd->sy)
582 break;
583 s->cx = cx;
584 if (wp != NULL)
585 screen_write_initctx(ctx, &ttyctx, 0);
586 for (xx = px; xx < px + nx; xx++) {
587 if (xx >= grid_get_line(gd, yy)->cellsize)
588 break;
589 grid_get_cell(gd, xx, yy, &gc);
590 if (xx + gc.data.width > px + nx)
591 break;
592 grid_view_set_cell(ctx->s->grid, s->cx, s->cy, &gc);
593 if (wp != NULL) {
594 ttyctx.cell = &gc;
595 tty_write(tty_cmd_cell, &ttyctx);
596 ttyctx.ocx++;
597 }
598 s->cx++;
599 }
600 s->cy++;
601 }
602
603 s->cx = cx;
604 s->cy = cy;
605 }
606
607 /* Select character set for drawing border lines. */
608 static void
609 screen_write_box_border_set(enum box_lines lines, int cell_type,
610 struct grid_cell *gc)
611 {
612 switch (lines) {
613 case BOX_LINES_NONE:
614 break;
615 case BOX_LINES_DOUBLE:
616 gc->attr &= ~GRID_ATTR_CHARSET;
617 utf8_copy(&gc->data, tty_acs_double_borders(cell_type));
618 break;
619 case BOX_LINES_HEAVY:
620 gc->attr &= ~GRID_ATTR_CHARSET;
621 utf8_copy(&gc->data, tty_acs_heavy_borders(cell_type));
622 break;
623 case BOX_LINES_ROUNDED:
624 gc->attr &= ~GRID_ATTR_CHARSET;
625 utf8_copy(&gc->data, tty_acs_rounded_borders(cell_type));
626 break;
627 case BOX_LINES_SIMPLE:
628 gc->attr &= ~GRID_ATTR_CHARSET;
629 utf8_set(&gc->data, SIMPLE_BORDERS[cell_type]);
630 break;
631 case BOX_LINES_PADDED:
632 gc->attr &= ~GRID_ATTR_CHARSET;
633 utf8_set(&gc->data, PADDED_BORDERS[cell_type]);
634 break;
635 case BOX_LINES_SINGLE:
636 case BOX_LINES_DEFAULT:
637 gc->attr |= GRID_ATTR_CHARSET;
638 utf8_set(&gc->data, CELL_BORDERS[cell_type]);
639 break;
640 }
641 }
642
643 /* Draw a horizontal line on screen. */
644 void
645 screen_write_hline(struct screen_write_ctx *ctx, u_int nx, int left, int right,
646 enum box_lines lines, const struct grid_cell *border_gc)
647 {
648 struct screen *s = ctx->s;
649 struct grid_cell gc;
650 u_int cx, cy, i;
651
652 cx = s->cx;
653 cy = s->cy;
654
655 if (border_gc != NULL)
656 memcpy(&gc, border_gc, sizeof gc);
657 else
658 memcpy(&gc, &grid_default_cell, sizeof gc);
659 gc.attr |= GRID_ATTR_CHARSET;
660
661 if (left)
662 screen_write_box_border_set(lines, CELL_LEFTJOIN, &gc);
663 else
664 screen_write_box_border_set(lines, CELL_LEFTRIGHT, &gc);
665 screen_write_cell(ctx, &gc);
666
667 screen_write_box_border_set(lines, CELL_LEFTRIGHT, &gc);
668 for (i = 1; i < nx - 1; i++)
669 screen_write_cell(ctx, &gc);
670
671 if (right)
672 screen_write_box_border_set(lines, CELL_RIGHTJOIN, &gc);
673 else
674 screen_write_box_border_set(lines, CELL_LEFTRIGHT, &gc);
675 screen_write_cell(ctx, &gc);
676
677 screen_write_set_cursor(ctx, cx, cy);
678 }
679
680 /* Draw a vertical line on screen. */
681 void
682 screen_write_vline(struct screen_write_ctx *ctx, u_int ny, int top, int bottom)
683 {
684 struct screen *s = ctx->s;
685 struct grid_cell gc;
686 u_int cx, cy, i;
687
688 cx = s->cx;
689 cy = s->cy;
690
691 memcpy(&gc, &grid_default_cell, sizeof gc);
692 gc.attr |= GRID_ATTR_CHARSET;
693
694 screen_write_putc(ctx, &gc, top ? 'w' : 'x');
695 for (i = 1; i < ny - 1; i++) {
696 screen_write_set_cursor(ctx, cx, cy + i);
697 screen_write_putc(ctx, &gc, 'x');
698 }
699 screen_write_set_cursor(ctx, cx, cy + ny - 1);
700 screen_write_putc(ctx, &gc, bottom ? 'v' : 'x');
701
702 screen_write_set_cursor(ctx, cx, cy);
703 }
704
705 /* Draw a menu on screen. */
706 void
707 screen_write_menu(struct screen_write_ctx *ctx, struct menu *menu, int choice,
708 enum box_lines lines, const struct grid_cell *menu_gc,
709 const struct grid_cell *border_gc, const struct grid_cell *choice_gc)
710 {
711 struct screen *s = ctx->s;
712 struct grid_cell default_gc;
713 const struct grid_cell *gc = &default_gc;
714 u_int cx, cy, i, j, width = menu->width;
715 const char *name;
716
717 cx = s->cx;
718 cy = s->cy;
719
720 memcpy(&default_gc, menu_gc, sizeof default_gc);
721
722 screen_write_box(ctx, menu->width + 4, menu->count + 2, lines,
723 border_gc, menu->title);
724
725 for (i = 0; i < menu->count; i++) {
726 name = menu->items[i].name;
727 if (name == NULL) {
728 screen_write_cursormove(ctx, cx, cy + 1 + i, 0);
729 screen_write_hline(ctx, width + 4, 1, 1, lines,
730 border_gc);
731 continue;
732 }
733
734 if (choice >= 0 && i == (u_int)choice && *name != '-')
735 gc = choice_gc;
736
737 screen_write_cursormove(ctx, cx + 1, cy + 1 + i, 0);
738 for (j = 0; j < width + 2; j++)
739 screen_write_putc(ctx, gc, ' ');
740
741 screen_write_cursormove(ctx, cx + 2, cy + 1 + i, 0);
742 if (*name == '-') {
743 default_gc.attr |= GRID_ATTR_DIM;
744 format_draw(ctx, gc, width, name + 1, NULL, 0);
745 default_gc.attr &= ~GRID_ATTR_DIM;
746 continue;
747 }
748
749 format_draw(ctx, gc, width, name, NULL, 0);
750 gc = &default_gc;
751 }
752
753 screen_write_set_cursor(ctx, cx, cy);
754 }
755
756 /* Draw a box on screen. */
757 void
758 screen_write_box(struct screen_write_ctx *ctx, u_int nx, u_int ny,
759 enum box_lines lines, const struct grid_cell *gcp, const char *title)
760 {
761 struct screen *s = ctx->s;
762 struct grid_cell gc;
763 u_int cx, cy, i;
764
765 cx = s->cx;
766 cy = s->cy;
767
768 if (gcp != NULL)
769 memcpy(&gc, gcp, sizeof gc);
770 else
771 memcpy(&gc, &grid_default_cell, sizeof gc);
772
773 gc.attr |= GRID_ATTR_CHARSET;
774 gc.flags |= GRID_FLAG_NOPALETTE;
775
776 /* Draw top border */
777 screen_write_box_border_set(lines, CELL_TOPLEFT, &gc);
778 screen_write_cell(ctx, &gc);
779 screen_write_box_border_set(lines, CELL_LEFTRIGHT, &gc);
780 for (i = 1; i < nx - 1; i++)
781 screen_write_cell(ctx, &gc);
782 screen_write_box_border_set(lines, CELL_TOPRIGHT, &gc);
783 screen_write_cell(ctx, &gc);
784
785 /* Draw bottom border */
786 screen_write_set_cursor(ctx, cx, cy + ny - 1);
787 screen_write_box_border_set(lines, CELL_BOTTOMLEFT, &gc);
788 screen_write_cell(ctx, &gc);
789 screen_write_box_border_set(lines, CELL_LEFTRIGHT, &gc);
790 for (i = 1; i < nx - 1; i++)
791 screen_write_cell(ctx, &gc);
792 screen_write_box_border_set(lines, CELL_BOTTOMRIGHT, &gc);
793 screen_write_cell(ctx, &gc);
794
795 /* Draw sides */
796 screen_write_box_border_set(lines, CELL_TOPBOTTOM, &gc);
797 for (i = 1; i < ny - 1; i++) {
798 /* left side */
799 screen_write_set_cursor(ctx, cx, cy + i);
800 screen_write_cell(ctx, &gc);
801 /* right side */
802 screen_write_set_cursor(ctx, cx + nx - 1, cy + i);
803 screen_write_cell(ctx, &gc);
804 }
805
806 if (title != NULL) {
807 gc.attr &= ~GRID_ATTR_CHARSET;
808 screen_write_cursormove(ctx, cx + 2, cy, 0);
809 format_draw(ctx, &gc, nx - 4, title, NULL, 0);
810 }
811
812 screen_write_set_cursor(ctx, cx, cy);
813 }
814
815 /*
816 * Write a preview version of a window. Assumes target area is big enough and
817 * already cleared.
818 */
819 void
820 screen_write_preview(struct screen_write_ctx *ctx, struct screen *src, u_int nx,
821 u_int ny)
822 {
823 struct screen *s = ctx->s;
824 struct grid_cell gc;
825 u_int cx, cy, px, py;
826
827 cx = s->cx;
828 cy = s->cy;
829
830 /*
831 * If the cursor is on, pick the area around the cursor, otherwise use
832 * the top left.
833 */
834 if (src->mode & MODE_CURSOR) {
835 px = src->cx;
836 if (px < nx / 3)
837 px = 0;
838 else
839 px = px - nx / 3;
840 if (px + nx > screen_size_x(src)) {
841 if (nx > screen_size_x(src))
842 px = 0;
843 else
844 px = screen_size_x(src) - nx;
845 }
846 py = src->cy;
847 if (py < ny / 3)
848 py = 0;
849 else
850 py = py - ny / 3;
851 if (py + ny > screen_size_y(src)) {
852 if (ny > screen_size_y(src))
853 py = 0;
854 else
855 py = screen_size_y(src) - ny;
856 }
857 } else {
858 px = 0;
859 py = 0;
860 }
861
862 screen_write_fast_copy(ctx, src, px, src->grid->hsize + py, nx, ny);
863
864 if (src->mode & MODE_CURSOR) {
865 grid_view_get_cell(src->grid, src->cx, src->cy, &gc);
866 gc.attr |= GRID_ATTR_REVERSE;
867 screen_write_set_cursor(ctx, cx + (src->cx - px),
868 cy + (src->cy - py));
869 screen_write_cell(ctx, &gc);
870 }
871 }
872
873 /* Set a mode. */
874 void
875 screen_write_mode_set(struct screen_write_ctx *ctx, int mode)
876 {
877 struct screen *s = ctx->s;
878
879 s->mode |= mode;
880
881 if (log_get_level() != 0)
882 log_debug("%s: %s", __func__, screen_mode_to_string(mode));
883 }
884
885 /* Clear a mode. */
886 void
887 screen_write_mode_clear(struct screen_write_ctx *ctx, int mode)
888 {
889 struct screen *s = ctx->s;
890
891 s->mode &= ~mode;
892
893 if (log_get_level() != 0)
894 log_debug("%s: %s", __func__, screen_mode_to_string(mode));
895 }
896
897 /* Cursor up by ny. */
898 void
899 screen_write_cursorup(struct screen_write_ctx *ctx, u_int ny)
900 {
901 struct screen *s = ctx->s;
902 u_int cx = s->cx, cy = s->cy;
903
904 if (ny == 0)
905 ny = 1;
906
907 if (cy < s->rupper) {
908 /* Above region. */
909 if (ny > cy)
910 ny = cy;
911 } else {
912 /* Below region. */
913 if (ny > cy - s->rupper)
914 ny = cy - s->rupper;
915 }
916 if (cx == screen_size_x(s))
917 cx--;
918
919 cy -= ny;
920
921 screen_write_set_cursor(ctx, cx, cy);
922 }
923
924 /* Cursor down by ny. */
925 void
926 screen_write_cursordown(struct screen_write_ctx *ctx, u_int ny)
927 {
928 struct screen *s = ctx->s;
929 u_int cx = s->cx, cy = s->cy;
930
931 if (ny == 0)
932 ny = 1;
933
934 if (cy > s->rlower) {
935 /* Below region. */
936 if (ny > screen_size_y(s) - 1 - cy)
937 ny = screen_size_y(s) - 1 - cy;
938 } else {
939 /* Above region. */
940 if (ny > s->rlower - cy)
941 ny = s->rlower - cy;
942 }
943 if (cx == screen_size_x(s))
944 cx--;
945 else if (ny == 0)
946 return;
947
948 cy += ny;
949
950 screen_write_set_cursor(ctx, cx, cy);
951 }
952
953 /* Cursor right by nx. */
954 void
955 screen_write_cursorright(struct screen_write_ctx *ctx, u_int nx)
956 {
957 struct screen *s = ctx->s;
958 u_int cx = s->cx, cy = s->cy;
959
960 if (nx == 0)
961 nx = 1;
962
963 if (nx > screen_size_x(s) - 1 - cx)
964 nx = screen_size_x(s) - 1 - cx;
965 if (nx == 0)
966 return;
967
968 cx += nx;
969
970 screen_write_set_cursor(ctx, cx, cy);
971 }
972
973 /* Cursor left by nx. */
974 void
975 screen_write_cursorleft(struct screen_write_ctx *ctx, u_int nx)
976 {
977 struct screen *s = ctx->s;
978 u_int cx = s->cx, cy = s->cy;
979
980 if (nx == 0)
981 nx = 1;
982
983 if (nx > cx)
984 nx = cx;
985 if (nx == 0)
986 return;
987
988 cx -= nx;
989
990 screen_write_set_cursor(ctx, cx, cy);
991 }
992
993 /* Backspace; cursor left unless at start of wrapped line when can move up. */
994 void
995 screen_write_backspace(struct screen_write_ctx *ctx)
996 {
997 struct screen *s = ctx->s;
998 struct grid_line *gl;
999 u_int cx = s->cx, cy = s->cy;
1000
1001 if (cx == 0) {
1002 if (cy == 0)
1003 return;
1004 gl = grid_get_line(s->grid, s->grid->hsize + cy - 1);
1005 if (gl->flags & GRID_LINE_WRAPPED) {
1006 cy--;
1007 cx = screen_size_x(s) - 1;
1008 }
1009 } else
1010 cx--;
1011
1012 screen_write_set_cursor(ctx, cx, cy);
1013 }
1014
1015 /* VT100 alignment test. */
1016 void
1017 screen_write_alignmenttest(struct screen_write_ctx *ctx)
1018 {
1019 struct screen *s = ctx->s;
1020 struct tty_ctx ttyctx;
1021 struct grid_cell gc;
1022 u_int xx, yy;
1023
1024 memcpy(&gc, &grid_default_cell, sizeof gc);
1025 utf8_set(&gc.data, 'E');
1026
1027 #ifdef ENABLE_SIXEL
1028 if (image_free_all(s) && ctx->wp != NULL)
1029 ctx->wp->flags |= PANE_REDRAW;
1030 #endif
1031
1032 for (yy = 0; yy < screen_size_y(s); yy++) {
1033 for (xx = 0; xx < screen_size_x(s); xx++)
1034 grid_view_set_cell(s->grid, xx, yy, &gc);
1035 }
1036
1037 screen_write_set_cursor(ctx, 0, 0);
1038
1039 s->rupper = 0;
1040 s->rlower = screen_size_y(s) - 1;
1041
1042 screen_write_initctx(ctx, &ttyctx, 1);
1043
1044 screen_write_collect_clear(ctx, 0, screen_size_y(s) - 1);
1045 tty_write(tty_cmd_alignmenttest, &ttyctx);
1046 }
1047
1048 /* Insert nx characters. */
1049 void
1050 screen_write_insertcharacter(struct screen_write_ctx *ctx, u_int nx, u_int bg)
1051 {
1052 struct screen *s = ctx->s;
1053 struct tty_ctx ttyctx;
1054
1055 if (nx == 0)
1056 nx = 1;
1057
1058 if (nx > screen_size_x(s) - s->cx)
1059 nx = screen_size_x(s) - s->cx;
1060 if (nx == 0)
1061 return;
1062
1063 if (s->cx > screen_size_x(s) - 1)
1064 return;
1065
1066 #ifdef ENABLE_SIXEL
1067 if (image_check_line(s, s->cy, 1) && ctx->wp != NULL)
1068 ctx->wp->flags |= PANE_REDRAW;
1069 #endif
1070
1071 screen_write_initctx(ctx, &ttyctx, 0);
1072 ttyctx.bg = bg;
1073
1074 grid_view_insert_cells(s->grid, s->cx, s->cy, nx, bg);
1075
1076 screen_write_collect_flush(ctx, 0, __func__);
1077 ttyctx.num = nx;
1078 tty_write(tty_cmd_insertcharacter, &ttyctx);
1079 }
1080
1081 /* Delete nx characters. */
1082 void
1083 screen_write_deletecharacter(struct screen_write_ctx *ctx, u_int nx, u_int bg)
1084 {
1085 struct screen *s = ctx->s;
1086 struct tty_ctx ttyctx;
1087
1088 if (nx == 0)
1089 nx = 1;
1090
1091 if (nx > screen_size_x(s) - s->cx)
1092 nx = screen_size_x(s) - s->cx;
1093 if (nx == 0)
1094 return;
1095
1096 if (s->cx > screen_size_x(s) - 1)
1097 return;
1098
1099 #ifdef ENABLE_SIXEL
1100 if (image_check_line(s, s->cy, 1) && ctx->wp != NULL)
1101 ctx->wp->flags |= PANE_REDRAW;
1102 #endif
1103
1104 screen_write_initctx(ctx, &ttyctx, 0);
1105 ttyctx.bg = bg;
1106
1107 grid_view_delete_cells(s->grid, s->cx, s->cy, nx, bg);
1108
1109 screen_write_collect_flush(ctx, 0, __func__);
1110 ttyctx.num = nx;
1111 tty_write(tty_cmd_deletecharacter, &ttyctx);
1112 }
1113
1114 /* Clear nx characters. */
1115 void
1116 screen_write_clearcharacter(struct screen_write_ctx *ctx, u_int nx, u_int bg)
1117 {
1118 struct screen *s = ctx->s;
1119 struct tty_ctx ttyctx;
1120
1121 if (nx == 0)
1122 nx = 1;
1123
1124 if (nx > screen_size_x(s) - s->cx)
1125 nx = screen_size_x(s) - s->cx;
1126 if (nx == 0)
1127 return;
1128
1129 if (s->cx > screen_size_x(s) - 1)
1130 return;
1131
1132 #ifdef ENABLE_SIXEL
1133 if (image_check_line(s, s->cy, 1) && ctx->wp != NULL)
1134 ctx->wp->flags |= PANE_REDRAW;
1135 #endif
1136
1137 screen_write_initctx(ctx, &ttyctx, 0);
1138 ttyctx.bg = bg;
1139
1140 grid_view_clear(s->grid, s->cx, s->cy, nx, 1, bg);
1141
1142 screen_write_collect_flush(ctx, 0, __func__);
1143 ttyctx.num = nx;
1144 tty_write(tty_cmd_clearcharacter, &ttyctx);
1145 }
1146
1147 /* Insert ny lines. */
1148 void
1149 screen_write_insertline(struct screen_write_ctx *ctx, u_int ny, u_int bg)
1150 {
1151 struct screen *s = ctx->s;
1152 struct grid *gd = s->grid;
1153 struct tty_ctx ttyctx;
1154
1155 #ifdef ENABLE_SIXEL
1156 u_int sy = screen_size_y(s);
1157 #endif
1158
1159 if (ny == 0)
1160 ny = 1;
1161
1162 #ifdef ENABLE_SIXEL
1163 if (image_check_line(s, s->cy, sy - s->cy) && ctx->wp != NULL)
1164 ctx->wp->flags |= PANE_REDRAW;
1165 #endif
1166
1167 if (s->cy < s->rupper || s->cy > s->rlower) {
1168 if (ny > screen_size_y(s) - s->cy)
1169 ny = screen_size_y(s) - s->cy;
1170 if (ny == 0)
1171 return;
1172
1173 screen_write_initctx(ctx, &ttyctx, 1);
1174 ttyctx.bg = bg;
1175
1176 grid_view_insert_lines(gd, s->cy, ny, bg);
1177
1178 screen_write_collect_flush(ctx, 0, __func__);
1179 ttyctx.num = ny;
1180 tty_write(tty_cmd_insertline, &ttyctx);
1181 return;
1182 }
1183
1184 if (ny > s->rlower + 1 - s->cy)
1185 ny = s->rlower + 1 - s->cy;
1186 if (ny == 0)
1187 return;
1188
1189 screen_write_initctx(ctx, &ttyctx, 1);
1190 ttyctx.bg = bg;
1191
1192 if (s->cy < s->rupper || s->cy > s->rlower)
1193 grid_view_insert_lines(gd, s->cy, ny, bg);
1194 else
1195 grid_view_insert_lines_region(gd, s->rlower, s->cy, ny, bg);
1196
1197 screen_write_collect_flush(ctx, 0, __func__);
1198
1199 ttyctx.num = ny;
1200 tty_write(tty_cmd_insertline, &ttyctx);
1201 }
1202
1203 /* Delete ny lines. */
1204 void
1205 screen_write_deleteline(struct screen_write_ctx *ctx, u_int ny, u_int bg)
1206 {
1207 struct screen *s = ctx->s;
1208 struct grid *gd = s->grid;
1209 struct tty_ctx ttyctx;
1210 u_int sy = screen_size_y(s);
1211
1212 if (ny == 0)
1213 ny = 1;
1214
1215 #ifdef ENABLE_SIXEL
1216 if (image_check_line(s, s->cy, sy - s->cy) && ctx->wp != NULL)
1217 ctx->wp->flags |= PANE_REDRAW;
1218 #endif
1219
1220 if (s->cy < s->rupper || s->cy > s->rlower) {
1221 if (ny > sy - s->cy)
1222 ny = sy - s->cy;
1223 if (ny == 0)
1224 return;
1225
1226 screen_write_initctx(ctx, &ttyctx, 1);
1227 ttyctx.bg = bg;
1228
1229 grid_view_delete_lines(gd, s->cy, ny, bg);
1230
1231 screen_write_collect_flush(ctx, 0, __func__);
1232 ttyctx.num = ny;
1233 tty_write(tty_cmd_deleteline, &ttyctx);
1234 return;
1235 }
1236
1237 if (ny > s->rlower + 1 - s->cy)
1238 ny = s->rlower + 1 - s->cy;
1239 if (ny == 0)
1240 return;
1241
1242 screen_write_initctx(ctx, &ttyctx, 1);
1243 ttyctx.bg = bg;
1244
1245 if (s->cy < s->rupper || s->cy > s->rlower)
1246 grid_view_delete_lines(gd, s->cy, ny, bg);
1247 else
1248 grid_view_delete_lines_region(gd, s->rlower, s->cy, ny, bg);
1249
1250 screen_write_collect_flush(ctx, 0, __func__);
1251 ttyctx.num = ny;
1252 tty_write(tty_cmd_deleteline, &ttyctx);
1253 }
1254
1255 /* Clear line at cursor. */
1256 void
1257 screen_write_clearline(struct screen_write_ctx *ctx, u_int bg)
1258 {
1259 struct screen *s = ctx->s;
1260 struct grid_line *gl;
1261 u_int sx = screen_size_x(s);
1262 struct screen_write_citem *ci = ctx->item;
1263
1264 gl = grid_get_line(s->grid, s->grid->hsize + s->cy);
1265 if (gl->cellsize == 0 && COLOUR_DEFAULT(bg))
1266 return;
1267
1268 #ifdef ENABLE_SIXEL
1269 if (image_check_line(s, s->cy, 1) && ctx->wp != NULL)
1270 ctx->wp->flags |= PANE_REDRAW;
1271 #endif
1272
1273 grid_view_clear(s->grid, 0, s->cy, sx, 1, bg);
1274
1275 screen_write_collect_clear(ctx, s->cy, 1);
1276 ci->x = 0;
1277 ci->used = sx;
1278 ci->type = CLEAR;
1279 ci->bg = bg;
1280 TAILQ_INSERT_TAIL(&ctx->s->write_list[s->cy].items, ci, entry);
1281 ctx->item = screen_write_get_citem();
1282 }
1283
1284 /* Clear to end of line from cursor. */
1285 void
1286 screen_write_clearendofline(struct screen_write_ctx *ctx, u_int bg)
1287 {
1288 struct screen *s = ctx->s;
1289 struct grid_line *gl;
1290 u_int sx = screen_size_x(s);
1291 struct screen_write_citem *ci = ctx->item, *before;
1292
1293 if (s->cx == 0) {
1294 screen_write_clearline(ctx, bg);
1295 return;
1296 }
1297
1298 gl = grid_get_line(s->grid, s->grid->hsize + s->cy);
1299 if (s->cx > sx - 1 || (s->cx >= gl->cellsize && COLOUR_DEFAULT(bg)))
1300 return;
1301
1302 #ifdef ENABLE_SIXEL
1303 if (image_check_line(s, s->cy, 1) && ctx->wp != NULL)
1304 ctx->wp->flags |= PANE_REDRAW;
1305 #endif
1306
1307 grid_view_clear(s->grid, s->cx, s->cy, sx - s->cx, 1, bg);
1308
1309 before = screen_write_collect_trim(ctx, s->cy, s->cx, sx - s->cx, NULL);
1310 ci->x = s->cx;
1311 ci->used = sx - s->cx;
1312 ci->type = CLEAR;
1313 ci->bg = bg;
1314 if (before == NULL)
1315 TAILQ_INSERT_TAIL(&ctx->s->write_list[s->cy].items, ci, entry);
1316 else
1317 TAILQ_INSERT_BEFORE(before, ci, entry);
1318 ctx->item = screen_write_get_citem();
1319 }
1320
1321 /* Clear to start of line from cursor. */
1322 void
1323 screen_write_clearstartofline(struct screen_write_ctx *ctx, u_int bg)
1324 {
1325 struct screen *s = ctx->s;
1326 u_int sx = screen_size_x(s);
1327 struct screen_write_citem *ci = ctx->item, *before;
1328
1329 if (s->cx >= sx - 1) {
1330 screen_write_clearline(ctx, bg);
1331 return;
1332 }
1333
1334 #ifdef ENABLE_SIXEL
1335 if (image_check_line(s, s->cy, 1) && ctx->wp != NULL)
1336 ctx->wp->flags |= PANE_REDRAW;
1337 #endif
1338
1339 if (s->cx > sx - 1)
1340 grid_view_clear(s->grid, 0, s->cy, sx, 1, bg);
1341 else
1342 grid_view_clear(s->grid, 0, s->cy, s->cx + 1, 1, bg);
1343
1344 before = screen_write_collect_trim(ctx, s->cy, 0, s->cx + 1, NULL);
1345 ci->x = 0;
1346 ci->used = s->cx + 1;
1347 ci->type = CLEAR;
1348 ci->bg = bg;
1349 if (before == NULL)
1350 TAILQ_INSERT_TAIL(&ctx->s->write_list[s->cy].items, ci, entry);
1351 else
1352 TAILQ_INSERT_BEFORE(before, ci, entry);
1353 ctx->item = screen_write_get_citem();
1354 }
1355
1356 /* Move cursor to px,py. */
1357 void
1358 screen_write_cursormove(struct screen_write_ctx *ctx, int px, int py,
1359 int origin)
1360 {
1361 struct screen *s = ctx->s;
1362
1363 if (origin && py != -1 && (s->mode & MODE_ORIGIN)) {
1364 if ((u_int)py > s->rlower - s->rupper)
1365 py = s->rlower;
1366 else
1367 py += s->rupper;
1368 }
1369
1370 if (px != -1 && (u_int)px > screen_size_x(s) - 1)
1371 px = screen_size_x(s) - 1;
1372 if (py != -1 && (u_int)py > screen_size_y(s) - 1)
1373 py = screen_size_y(s) - 1;
1374
1375 log_debug("%s: from %u,%u to %u,%u", __func__, s->cx, s->cy, px, py);
1376 screen_write_set_cursor(ctx, px, py);
1377 }
1378
1379 /* Reverse index (up with scroll). */
1380 void
1381 screen_write_reverseindex(struct screen_write_ctx *ctx, u_int bg)
1382 {
1383 struct screen *s = ctx->s;
1384 struct tty_ctx ttyctx;
1385
1386 if (s->cy == s->rupper) {
1387 #ifdef ENABLE_SIXEL
1388 if (image_free_all(s) && ctx->wp != NULL)
1389 ctx->wp->flags |= PANE_REDRAW;
1390 #endif
1391
1392 grid_view_scroll_region_down(s->grid, s->rupper, s->rlower, bg);
1393 screen_write_collect_flush(ctx, 0, __func__);
1394
1395 screen_write_initctx(ctx, &ttyctx, 1);
1396 ttyctx.bg = bg;
1397
1398 tty_write(tty_cmd_reverseindex, &ttyctx);
1399 } else if (s->cy > 0)
1400 screen_write_set_cursor(ctx, -1, s->cy - 1);
1401
1402 }
1403
1404 /* Set scroll region. */
1405 void
1406 screen_write_scrollregion(struct screen_write_ctx *ctx, u_int rupper,
1407 u_int rlower)
1408 {
1409 struct screen *s = ctx->s;
1410
1411 if (rupper > screen_size_y(s) - 1)
1412 rupper = screen_size_y(s) - 1;
1413 if (rlower > screen_size_y(s) - 1)
1414 rlower = screen_size_y(s) - 1;
1415 if (rupper >= rlower) /* cannot be one line */
1416 return;
1417
1418 screen_write_collect_flush(ctx, 0, __func__);
1419
1420 /* Cursor moves to top-left. */
1421 screen_write_set_cursor(ctx, 0, 0);
1422
1423 s->rupper = rupper;
1424 s->rlower = rlower;
1425 }
1426
1427 /* Line feed. */
1428 void
1429 screen_write_linefeed(struct screen_write_ctx *ctx, int wrapped, u_int bg)
1430 {
1431 struct screen *s = ctx->s;
1432 struct grid *gd = s->grid;
1433 struct grid_line *gl;
1434 #ifdef ENABLE_SIXEL
1435 int redraw = 0;
1436 #endif
1437 u_int rupper = s->rupper, rlower = s->rlower;
1438
1439 gl = grid_get_line(gd, gd->hsize + s->cy);
1440 if (wrapped)
1441 gl->flags |= GRID_LINE_WRAPPED;
1442
1443 log_debug("%s: at %u,%u (region %u-%u)", __func__, s->cx, s->cy,
1444 rupper, rlower);
1445
1446 if (bg != ctx->bg) {
1447 screen_write_collect_flush(ctx, 1, __func__);
1448 ctx->bg = bg;
1449 }
1450
1451 if (s->cy == s->rlower) {
1452 #ifdef ENABLE_SIXEL
1453 if (rlower == screen_size_y(s) - 1)
1454 redraw = image_scroll_up(s, 1);
1455 else
1456 redraw = image_check_line(s, rupper, rlower - rupper);
1457 if (redraw && ctx->wp != NULL)
1458 ctx->wp->flags |= PANE_REDRAW;
1459 #endif
1460 grid_view_scroll_region_up(gd, s->rupper, s->rlower, bg);
1461 screen_write_collect_scroll(ctx, bg);
1462 ctx->scrolled++;
1463 } else if (s->cy < screen_size_y(s) - 1)
1464 screen_write_set_cursor(ctx, -1, s->cy + 1);
1465 }
1466
1467 /* Scroll up. */
1468 void
1469 screen_write_scrollup(struct screen_write_ctx *ctx, u_int lines, u_int bg)
1470 {
1471 struct screen *s = ctx->s;
1472 struct grid *gd = s->grid;
1473 u_int i;
1474
1475 if (lines == 0)
1476 lines = 1;
1477 else if (lines > s->rlower - s->rupper + 1)
1478 lines = s->rlower - s->rupper + 1;
1479
1480 if (bg != ctx->bg) {
1481 screen_write_collect_flush(ctx, 1, __func__);
1482 ctx->bg = bg;
1483 }
1484
1485 #ifdef ENABLE_SIXEL
1486 if (image_scroll_up(s, lines) && ctx->wp != NULL)
1487 ctx->wp->flags |= PANE_REDRAW;
1488 #endif
1489
1490 for (i = 0; i < lines; i++) {
1491 grid_view_scroll_region_up(gd, s->rupper, s->rlower, bg);
1492 screen_write_collect_scroll(ctx, bg);
1493 }
1494 ctx->scrolled += lines;
1495 }
1496
1497 /* Scroll down. */
1498 void
1499 screen_write_scrolldown(struct screen_write_ctx *ctx, u_int lines, u_int bg)
1500 {
1501 struct screen *s = ctx->s;
1502 struct grid *gd = s->grid;
1503 struct tty_ctx ttyctx;
1504 u_int i;
1505
1506 screen_write_initctx(ctx, &ttyctx, 1);
1507 ttyctx.bg = bg;
1508
1509 if (lines == 0)
1510 lines = 1;
1511 else if (lines > s->rlower - s->rupper + 1)
1512 lines = s->rlower - s->rupper + 1;
1513
1514 #ifdef ENABLE_SIXEL
1515 if (image_free_all(s) && ctx->wp != NULL)
1516 ctx->wp->flags |= PANE_REDRAW;
1517 #endif
1518
1519 for (i = 0; i < lines; i++)
1520 grid_view_scroll_region_down(gd, s->rupper, s->rlower, bg);
1521
1522 screen_write_collect_flush(ctx, 0, __func__);
1523 ttyctx.num = lines;
1524 tty_write(tty_cmd_scrolldown, &ttyctx);
1525 }
1526
1527 /* Carriage return (cursor to start of line). */
1528 void
1529 screen_write_carriagereturn(struct screen_write_ctx *ctx)
1530 {
1531 screen_write_set_cursor(ctx, 0, -1);
1532 }
1533
1534 /* Clear to end of screen from cursor. */
1535 void
1536 screen_write_clearendofscreen(struct screen_write_ctx *ctx, u_int bg)
1537 {
1538 struct screen *s = ctx->s;
1539 struct grid *gd = s->grid;
1540 struct tty_ctx ttyctx;
1541 u_int sx = screen_size_x(s), sy = screen_size_y(s);
1542
1543 #ifdef ENABLE_SIXEL
1544 if (image_check_line(s, s->cy, sy - s->cy) && ctx->wp != NULL)
1545 ctx->wp->flags |= PANE_REDRAW;
1546 #endif
1547
1548 screen_write_initctx(ctx, &ttyctx, 1);
1549 ttyctx.bg = bg;
1550
1551 /* Scroll into history if it is enabled and clearing entire screen. */
1552 if (s->cx == 0 &&
1553 s->cy == 0 &&
1554 (gd->flags & GRID_HISTORY) &&
1555 ctx->wp != NULL &&
1556 options_get_number(ctx->wp->options, "scroll-on-clear"))
1557 grid_view_clear_history(gd, bg);
1558 else {
1559 if (s->cx <= sx - 1)
1560 grid_view_clear(gd, s->cx, s->cy, sx - s->cx, 1, bg);
1561 grid_view_clear(gd, 0, s->cy + 1, sx, sy - (s->cy + 1), bg);
1562 }
1563
1564 screen_write_collect_clear(ctx, s->cy + 1, sy - (s->cy + 1));
1565 screen_write_collect_flush(ctx, 0, __func__);
1566 tty_write(tty_cmd_clearendofscreen, &ttyctx);
1567 }
1568
1569 /* Clear to start of screen. */
1570 void
1571 screen_write_clearstartofscreen(struct screen_write_ctx *ctx, u_int bg)
1572 {
1573 struct screen *s = ctx->s;
1574 struct tty_ctx ttyctx;
1575 u_int sx = screen_size_x(s);
1576
1577 #ifdef ENABLE_SIXEL
1578 if (image_check_line(s, 0, s->cy - 1) && ctx->wp != NULL)
1579 ctx->wp->flags |= PANE_REDRAW;
1580 #endif
1581
1582 screen_write_initctx(ctx, &ttyctx, 1);
1583 ttyctx.bg = bg;
1584
1585 if (s->cy > 0)
1586 grid_view_clear(s->grid, 0, 0, sx, s->cy, bg);
1587 if (s->cx > sx - 1)
1588 grid_view_clear(s->grid, 0, s->cy, sx, 1, bg);
1589 else
1590 grid_view_clear(s->grid, 0, s->cy, s->cx + 1, 1, bg);
1591
1592 screen_write_collect_clear(ctx, 0, s->cy);
1593 screen_write_collect_flush(ctx, 0, __func__);
1594 tty_write(tty_cmd_clearstartofscreen, &ttyctx);
1595 }
1596
1597 /* Clear entire screen. */
1598 void
1599 screen_write_clearscreen(struct screen_write_ctx *ctx, u_int bg)
1600 {
1601 struct screen *s = ctx->s;
1602 struct tty_ctx ttyctx;
1603 u_int sx = screen_size_x(s), sy = screen_size_y(s);
1604
1605 #ifdef ENABLE_SIXEL
1606 if (image_free_all(s) && ctx->wp != NULL)
1607 ctx->wp->flags |= PANE_REDRAW;
1608 #endif
1609
1610 screen_write_initctx(ctx, &ttyctx, 1);
1611 ttyctx.bg = bg;
1612
1613 /* Scroll into history if it is enabled. */
1614 if ((s->grid->flags & GRID_HISTORY) &&
1615 ctx->wp != NULL &&
1616 options_get_number(ctx->wp->options, "scroll-on-clear"))
1617 grid_view_clear_history(s->grid, bg);
1618 else
1619 grid_view_clear(s->grid, 0, 0, sx, sy, bg);
1620
1621 screen_write_collect_clear(ctx, 0, sy);
1622 tty_write(tty_cmd_clearscreen, &ttyctx);
1623 }
1624
1625 /* Clear entire history. */
1626 void
1627 screen_write_clearhistory(struct screen_write_ctx *ctx)
1628 {
1629 grid_clear_history(ctx->s->grid);
1630 }
1631
1632 /* Force a full redraw. */
1633 void
1634 screen_write_fullredraw(struct screen_write_ctx *ctx)
1635 {
1636 struct tty_ctx ttyctx;
1637
1638 screen_write_collect_flush(ctx, 0, __func__);
1639
1640 screen_write_initctx(ctx, &ttyctx, 1);
1641 if (ttyctx.redraw_cb != NULL)
1642 ttyctx.redraw_cb(&ttyctx);
1643 }
1644
1645 /* Trim collected items. */
1646 static struct screen_write_citem *
1647 screen_write_collect_trim(struct screen_write_ctx *ctx, u_int y, u_int x,
1648 u_int used, int *wrapped)
1649 {
1650 struct screen_write_cline *cl = &ctx->s->write_list[y];
1651 struct screen_write_citem *ci, *ci2, *tmp, *before = NULL;
1652 u_int sx = x, ex = x + used - 1;
1653 u_int csx, cex;
1654
1655 if (TAILQ_EMPTY(&cl->items))
1656 return (NULL);
1657 TAILQ_FOREACH_SAFE(ci, &cl->items, entry, tmp) {
1658 csx = ci->x;
1659 cex = ci->x + ci->used - 1;
1660
1661 /* Item is entirely before. */
1662 if (cex < sx) {
1663 log_debug("%s: %p %u-%u before %u-%u", __func__, ci,
1664 csx, cex, sx, ex);
1665 continue;
1666 }
1667
1668 /* Item is entirely after. */
1669 if (csx > ex) {
1670 log_debug("%s: %p %u-%u after %u-%u", __func__, ci,
1671 csx, cex, sx, ex);
1672 before = ci;
1673 break;
1674 }
1675
1676 /* Item is entirely inside. */
1677 if (csx >= sx && cex <= ex) {
1678 log_debug("%s: %p %u-%u inside %u-%u", __func__, ci,
1679 csx, cex, sx, ex);
1680 TAILQ_REMOVE(&cl->items, ci, entry);
1681 screen_write_free_citem(ci);
1682 if (csx == 0 && ci->wrapped && wrapped != NULL)
1683 *wrapped = 1;
1684 continue;
1685 }
1686
1687 /* Item under the start. */
1688 if (csx < sx && cex >= sx && cex <= ex) {
1689 log_debug("%s: %p %u-%u start %u-%u", __func__, ci,
1690 csx, cex, sx, ex);
1691 ci->used = sx - csx;
1692 log_debug("%s: %p now %u-%u", __func__, ci, ci->x,
1693 ci->x + ci->used + 1);
1694 continue;
1695 }
1696
1697 /* Item covers the end. */
1698 if (cex > ex && csx >= sx && csx <= ex) {
1699 log_debug("%s: %p %u-%u end %u-%u", __func__, ci,
1700 csx, cex, sx, ex);
1701 ci->x = ex + 1;
1702 ci->used = cex - ex;
1703 log_debug("%s: %p now %u-%u", __func__, ci, ci->x,
1704 ci->x + ci->used + 1);
1705 before = ci;
1706 break;
1707 }
1708
1709 /* Item must cover both sides. */
1710 log_debug("%s: %p %u-%u under %u-%u", __func__, ci,
1711 csx, cex, sx, ex);
1712 ci2 = screen_write_get_citem();
1713 ci2->type = ci->type;
1714 ci2->bg = ci->bg;
1715 memcpy(&ci2->gc, &ci->gc, sizeof ci2->gc);
1716 TAILQ_INSERT_AFTER(&cl->items, ci, ci2, entry);
1717
1718 ci->used = sx - csx;
1719 ci2->x = ex + 1;
1720 ci2->used = cex - ex;
1721
1722 log_debug("%s: %p now %u-%u (%p) and %u-%u (%p)", __func__, ci,
1723 ci->x, ci->x + ci->used - 1, ci, ci2->x,
1724 ci2->x + ci2->used - 1, ci2);
1725 before = ci2;
1726 break;
1727 }
1728 return (before);
1729 }
1730
1731 /* Clear collected lines. */
1732 static void
1733 screen_write_collect_clear(struct screen_write_ctx *ctx, u_int y, u_int n)
1734 {
1735 struct screen_write_cline *cl;
1736 u_int i;
1737
1738 for (i = y; i < y + n; i++) {
1739 cl = &ctx->s->write_list[i];
1740 TAILQ_CONCAT(&screen_write_citem_freelist, &cl->items, entry);
1741 }
1742 }
1743
1744 /* Scroll collected lines up. */
1745 static void
1746 screen_write_collect_scroll(struct screen_write_ctx *ctx, u_int bg)
1747 {
1748 struct screen *s = ctx->s;
1749 struct screen_write_cline *cl;
1750 u_int y;
1751 char *saved;
1752 struct screen_write_citem *ci;
1753
1754 log_debug("%s: at %u,%u (region %u-%u)", __func__, s->cx, s->cy,
1755 s->rupper, s->rlower);
1756
1757 screen_write_collect_clear(ctx, s->rupper, 1);
1758 saved = ctx->s->write_list[s->rupper].data;
1759 for (y = s->rupper; y < s->rlower; y++) {
1760 cl = &ctx->s->write_list[y + 1];
1761 TAILQ_CONCAT(&ctx->s->write_list[y].items, &cl->items, entry);
1762 ctx->s->write_list[y].data = cl->data;
1763 }
1764 ctx->s->write_list[s->rlower].data = saved;
1765
1766 ci = screen_write_get_citem();
1767 ci->x = 0;
1768 ci->used = screen_size_x(s);
1769 ci->type = CLEAR;
1770 ci->bg = bg;
1771 TAILQ_INSERT_TAIL(&ctx->s->write_list[s->rlower].items, ci, entry);
1772 }
1773
1774 /* Flush collected lines. */
1775 static void
1776 screen_write_collect_flush(struct screen_write_ctx *ctx, int scroll_only,
1777 const char *from)
1778 {
1779 struct screen *s = ctx->s;
1780 struct screen_write_citem *ci, *tmp;
1781 struct screen_write_cline *cl;
1782 u_int y, cx, cy, last, items = 0;
1783 struct tty_ctx ttyctx;
1784
1785 if (ctx->scrolled != 0) {
1786 log_debug("%s: scrolled %u (region %u-%u)", __func__,
1787 ctx->scrolled, s->rupper, s->rlower);
1788 if (ctx->scrolled > s->rlower - s->rupper + 1)
1789 ctx->scrolled = s->rlower - s->rupper + 1;
1790
1791 screen_write_initctx(ctx, &ttyctx, 1);
1792 ttyctx.num = ctx->scrolled;
1793 ttyctx.bg = ctx->bg;
1794 tty_write(tty_cmd_scrollup, &ttyctx);
1795
1796 if (ctx->wp != NULL)
1797 ctx->wp->flags |= PANE_REDRAWSCROLLBAR;
1798 }
1799 ctx->scrolled = 0;
1800 ctx->bg = 8;
1801
1802 if (scroll_only)
1803 return;
1804
1805 cx = s->cx; cy = s->cy;
1806 for (y = 0; y < screen_size_y(s); y++) {
1807 cl = &ctx->s->write_list[y];
1808 last = UINT_MAX;
1809 TAILQ_FOREACH_SAFE(ci, &cl->items, entry, tmp) {
1810 if (last != UINT_MAX && ci->x <= last) {
1811 fatalx("collect list not in order: %u <= %u",
1812 ci->x, last);
1813 }
1814 screen_write_set_cursor(ctx, ci->x, y);
1815 if (ci->type == CLEAR) {
1816 screen_write_initctx(ctx, &ttyctx, 1);
1817 ttyctx.bg = ci->bg;
1818 ttyctx.num = ci->used;
1819 tty_write(tty_cmd_clearcharacter, &ttyctx);
1820 } else {
1821 screen_write_initctx(ctx, &ttyctx, 0);
1822 ttyctx.cell = &ci->gc;
1823 ttyctx.wrapped = ci->wrapped;
1824 ttyctx.ptr = cl->data + ci->x;
1825 ttyctx.num = ci->used;
1826 tty_write(tty_cmd_cells, &ttyctx);
1827 }
1828 items++;
1829
1830 TAILQ_REMOVE(&cl->items, ci, entry);
1831 screen_write_free_citem(ci);
1832 last = ci->x;
1833 }
1834 }
1835 s->cx = cx; s->cy = cy;
1836
1837 log_debug("%s: flushed %u items (%s)", __func__, items, from);
1838 }
1839
1840 /* Finish and store collected cells. */
1841 void
1842 screen_write_collect_end(struct screen_write_ctx *ctx)
1843 {
1844 struct screen *s = ctx->s;
1845 struct screen_write_citem *ci = ctx->item, *before;
1846 struct screen_write_cline *cl = &s->write_list[s->cy];
1847 struct grid_cell gc;
1848 u_int xx;
1849 int wrapped = ci->wrapped;
1850
1851 if (ci->used == 0)
1852 return;
1853
1854 before = screen_write_collect_trim(ctx, s->cy, s->cx, ci->used,
1855 &wrapped);
1856 ci->x = s->cx;
1857 ci->wrapped = wrapped;
1858 if (before == NULL)
1859 TAILQ_INSERT_TAIL(&cl->items, ci, entry);
1860 else
1861 TAILQ_INSERT_BEFORE(before, ci, entry);
1862 ctx->item = screen_write_get_citem();
1863
1864 log_debug("%s: %u %.*s (at %u,%u)", __func__, ci->used,
1865 (int)ci->used, cl->data + ci->x, s->cx, s->cy);
1866
1867 if (s->cx != 0) {
1868 for (xx = s->cx; xx > 0; xx--) {
1869 grid_view_get_cell(s->grid, xx, s->cy, &gc);
1870 if (~gc.flags & GRID_FLAG_PADDING)
1871 break;
1872 grid_view_set_cell(s->grid, xx, s->cy,
1873 &grid_default_cell);
1874 }
1875 if (gc.data.width > 1) {
1876 grid_view_set_cell(s->grid, xx, s->cy,
1877 &grid_default_cell);
1878 }
1879 }
1880
1881 #ifdef ENABLE_SIXEL
1882 if (image_check_area(s, s->cx, s->cy, ci->used, 1) && ctx->wp != NULL)
1883 ctx->wp->flags |= PANE_REDRAW;
1884 #endif
1885
1886 grid_view_set_cells(s->grid, s->cx, s->cy, &ci->gc, cl->data + ci->x,
1887 ci->used);
1888 screen_write_set_cursor(ctx, s->cx + ci->used, -1);
1889
1890 for (xx = s->cx; xx < screen_size_x(s); xx++) {
1891 grid_view_get_cell(s->grid, xx, s->cy, &gc);
1892 if (~gc.flags & GRID_FLAG_PADDING)
1893 break;
1894 grid_view_set_cell(s->grid, xx, s->cy, &grid_default_cell);
1895 }
1896 }
1897
1898 /* Write cell data, collecting if necessary. */
1899 void
1900 screen_write_collect_add(struct screen_write_ctx *ctx,
1901 const struct grid_cell *gc)
1902 {
1903 struct screen *s = ctx->s;
1904 struct screen_write_citem *ci;
1905 u_int sx = screen_size_x(s);
1906 int collect;
1907
1908 /*
1909 * Don't need to check that the attributes and whatnot are still the
1910 * same - input_parse will end the collection when anything that isn't
1911 * a plain character is encountered.
1912 */
1913
1914 collect = 1;
1915 if (gc->data.width != 1 || gc->data.size != 1 || *gc->data.data >= 0x7f)
1916 collect = 0;
1917 else if (gc->flags & GRID_FLAG_TAB)
1918 collect = 0;
1919 else if (gc->attr & GRID_ATTR_CHARSET)
1920 collect = 0;
1921 else if (~s->mode & MODE_WRAP)
1922 collect = 0;
1923 else if (s->mode & MODE_INSERT)
1924 collect = 0;
1925 else if (s->sel != NULL)
1926 collect = 0;
1927 if (!collect) {
1928 screen_write_collect_end(ctx);
1929 screen_write_collect_flush(ctx, 0, __func__);
1930 screen_write_cell(ctx, gc);
1931 return;
1932 }
1933
1934 if (s->cx > sx - 1 || ctx->item->used > sx - 1 - s->cx)
1935 screen_write_collect_end(ctx);
1936 ci = ctx->item; /* may have changed */
1937
1938 if (s->cx > sx - 1) {
1939 log_debug("%s: wrapped at %u,%u", __func__, s->cx, s->cy);
1940 ci->wrapped = 1;
1941 screen_write_linefeed(ctx, 1, 8);
1942 screen_write_set_cursor(ctx, 0, -1);
1943 }
1944
1945 if (ci->used == 0)
1946 memcpy(&ci->gc, gc, sizeof ci->gc);
1947 if (ctx->s->write_list[s->cy].data == NULL)
1948 ctx->s->write_list[s->cy].data = xmalloc(screen_size_x(ctx->s));
1949 ctx->s->write_list[s->cy].data[s->cx + ci->used++] = gc->data.data[0];
1950 }
1951
1952 /* Write cell data. */
1953 void
1954 screen_write_cell(struct screen_write_ctx *ctx, const struct grid_cell *gc)
1955 {
1956 struct screen *s = ctx->s;
1957 struct grid *gd = s->grid;
1958 const struct utf8_data *ud = &gc->data;
1959 struct grid_line *gl;
1960 struct grid_cell_entry *gce;
1961 struct grid_cell tmp_gc, now_gc;
1962 struct tty_ctx ttyctx;
1963 u_int sx = screen_size_x(s), sy = screen_size_y(s);
1964 u_int width = ud->width, xx, not_wrap;
1965 int selected, skip = 1;
1966
1967 /* Ignore padding cells. */
1968 if (gc->flags & GRID_FLAG_PADDING)
1969 return;
1970
1971 /* Get the previous cell to check for combining. */
1972 if (screen_write_combine(ctx, gc) != 0)
1973 return;
1974
1975 /* Flush any existing scrolling. */
1976 screen_write_collect_flush(ctx, 1, __func__);
1977
1978 /* If this character doesn't fit, ignore it. */
1979 if ((~s->mode & MODE_WRAP) &&
1980 width > 1 &&
1981 (width > sx || (s->cx != sx && s->cx > sx - width)))
1982 return;
1983
1984 /* If in insert mode, make space for the cells. */
1985 if (s->mode & MODE_INSERT) {
1986 grid_view_insert_cells(s->grid, s->cx, s->cy, width, 8);
1987 skip = 0;
1988 }
1989
1990 /* Check this will fit on the current line and wrap if not. */
1991 if ((s->mode & MODE_WRAP) && s->cx > sx - width) {
1992 log_debug("%s: wrapped at %u,%u", __func__, s->cx, s->cy);
1993 screen_write_linefeed(ctx, 1, 8);
1994 screen_write_set_cursor(ctx, 0, -1);
1995 screen_write_collect_flush(ctx, 1, __func__);
1996 }
1997
1998 /* Sanity check cursor position. */
1999 if (s->cx > sx - width || s->cy > sy - 1)
2000 return;
2001 screen_write_initctx(ctx, &ttyctx, 0);
2002
2003 /* Handle overwriting of UTF-8 characters. */
2004 gl = grid_get_line(s->grid, s->grid->hsize + s->cy);
2005 if (gl->flags & GRID_LINE_EXTENDED) {
2006 grid_view_get_cell(gd, s->cx, s->cy, &now_gc);
2007 if (screen_write_overwrite(ctx, &now_gc, width))
2008 skip = 0;
2009 }
2010
2011 /*
2012 * If the new character is UTF-8 wide, fill in padding cells. Have
2013 * already ensured there is enough room.
2014 */
2015 for (xx = s->cx + 1; xx < s->cx + width; xx++) {
2016 log_debug("%s: new padding at %u,%u", __func__, xx, s->cy);
2017 grid_view_set_padding(gd, xx, s->cy);
2018 skip = 0;
2019 }
2020
2021 /* If no change, do not draw. */
2022 if (skip) {
2023 if (s->cx >= gl->cellsize)
2024 skip = grid_cells_equal(gc, &grid_default_cell);
2025 else {
2026 gce = &gl->celldata[s->cx];
2027 if (gce->flags & GRID_FLAG_EXTENDED)
2028 skip = 0;
2029 else if (gc->flags != gce->flags)
2030 skip = 0;
2031 else if (gc->attr != gce->data.attr)
2032 skip = 0;
2033 else if (gc->fg != gce->data.fg)
2034 skip = 0;
2035 else if (gc->bg != gce->data.bg)
2036 skip = 0;
2037 else if (gc->data.width != 1)
2038 skip = 0;
2039 else if (gc->data.size != 1)
2040 skip = 0;
2041 else if (gce->data.data != gc->data.data[0])
2042 skip = 0;
2043 }
2044 }
2045
2046 /* Update the selected flag and set the cell. */
2047 selected = screen_check_selection(s, s->cx, s->cy);
2048 if (selected && (~gc->flags & GRID_FLAG_SELECTED)) {
2049 memcpy(&tmp_gc, gc, sizeof tmp_gc);
2050 tmp_gc.flags |= GRID_FLAG_SELECTED;
2051 grid_view_set_cell(gd, s->cx, s->cy, &tmp_gc);
2052 } else if (!selected && (gc->flags & GRID_FLAG_SELECTED)) {
2053 memcpy(&tmp_gc, gc, sizeof tmp_gc);
2054 tmp_gc.flags &= ~GRID_FLAG_SELECTED;
2055 grid_view_set_cell(gd, s->cx, s->cy, &tmp_gc);
2056 } else if (!skip)
2057 grid_view_set_cell(gd, s->cx, s->cy, gc);
2058 if (selected)
2059 skip = 0;
2060
2061 /*
2062 * Move the cursor. If not wrapping, stick at the last character and
2063 * replace it.
2064 */
2065 not_wrap = !(s->mode & MODE_WRAP);
2066 if (s->cx <= sx - not_wrap - width)
2067 screen_write_set_cursor(ctx, s->cx + width, -1);
2068 else
2069 screen_write_set_cursor(ctx, sx - not_wrap, -1);
2070
2071 /* Create space for character in insert mode. */
2072 if (s->mode & MODE_INSERT) {
2073 screen_write_collect_flush(ctx, 0, __func__);
2074 ttyctx.num = width;
2075 tty_write(tty_cmd_insertcharacter, &ttyctx);
2076 }
2077
2078 /* Write to the screen. */
2079 if (!skip) {
2080 if (selected) {
2081 screen_select_cell(s, &tmp_gc, gc);
2082 ttyctx.cell = &tmp_gc;
2083 } else
2084 ttyctx.cell = gc;
2085 tty_write(tty_cmd_cell, &ttyctx);
2086 }
2087 }
2088
2089 /* Combine a UTF-8 zero-width character onto the previous if necessary. */
2090 static int
2091 screen_write_combine(struct screen_write_ctx *ctx, const struct grid_cell *gc)
2092 {
2093 struct screen *s = ctx->s;
2094 struct grid *gd = s->grid;
2095 const struct utf8_data *ud = &gc->data;
2096 u_int n, cx = s->cx, cy = s->cy;
2097 struct grid_cell last;
2098 struct tty_ctx ttyctx;
2099 int force_wide = 0, zero_width = 0;
2100
2101 /*
2102 * Is this character which makes no sense without being combined? If
2103 * this is true then flag it here and discard the character (return 1)
2104 * if we cannot combine it.
2105 */
2106 if (utf8_is_zwj(ud))
2107 zero_width = 1;
2108 else if (utf8_is_vs(ud))
2109 zero_width = force_wide = 1;
2110 else if (ud->width == 0)
2111 zero_width = 1;
2112
2113 /* Cannot combine empty character or at left. */
2114 if (ud->size < 2 || cx == 0)
2115 return (zero_width);
2116 log_debug("%s: character %.*s at %u,%u (width %u)", __func__,
2117 (int)ud->size, ud->data, cx, cy, ud->width);
2118
2119 /* Find the cell to combine with. */
2120 n = 1;
2121 grid_view_get_cell(gd, cx - n, cy, &last);
2122 if (cx != 1 && (last.flags & GRID_FLAG_PADDING)) {
2123 n = 2;
2124 grid_view_get_cell(gd, cx - n, cy, &last);
2125 }
2126 if (n != last.data.width || (last.flags & GRID_FLAG_PADDING))
2127 return (zero_width);
2128
2129 /*
2130 * Check if we need to combine characters. This could be zero width
2131 * (set above), a modifier character (with an existing Unicode
2132 * character) or a previous ZWJ.
2133 */
2134 if (!zero_width) {
2135 if (utf8_is_modifier(ud)) {
2136 if (last.data.size < 2)
2137 return (0);
2138 force_wide = 1;
2139 } else if (!utf8_has_zwj(&last.data))
2140 return (0);
2141 }
2142
2143 /* Check if this combined character would be too long. */
2144 if (last.data.size + ud->size > sizeof last.data.data)
2145 return (0);
2146
2147 /* Combining; flush any pending output. */
2148 screen_write_collect_flush(ctx, 0, __func__);
2149
2150 log_debug("%s: %.*s -> %.*s at %u,%u (offset %u, width %u)", __func__,
2151 (int)ud->size, ud->data, (int)last.data.size, last.data.data,
2152 cx - n, cy, n, last.data.width);
2153
2154 /* Append the data. */
2155 memcpy(last.data.data + last.data.size, ud->data, ud->size);
2156 last.data.size += ud->size;
2157
2158 /* Force the width to 2 for modifiers and variation selector. */
2159 if (last.data.width == 1 && force_wide) {
2160 last.data.width = 2;
2161 n = 2;
2162 cx++;
2163 } else
2164 force_wide = 0;
2165
2166 /* Set the new cell. */
2167 grid_view_set_cell(gd, cx - n, cy, &last);
2168 if (force_wide)
2169 grid_view_set_padding(gd, cx - 1, cy);
2170
2171 /*
2172 * Redraw the combined cell. If forcing the cell to width 2, reset the
2173 * cached cursor position in the tty, since we don't really know
2174 * whether the terminal thought the character was width 1 or width 2
2175 * and what it is going to do now.
2176 */
2177 screen_write_set_cursor(ctx, cx - n, cy);
2178 screen_write_initctx(ctx, &ttyctx, 0);
2179 ttyctx.cell = &last;
2180 ttyctx.num = force_wide; /* reset cached cursor position */
2181 tty_write(tty_cmd_cell, &ttyctx);
2182 screen_write_set_cursor(ctx, cx, cy);
2183
2184 return (1);
2185 }
2186
2187 /*
2188 * UTF-8 wide characters are a bit of an annoyance. They take up more than one
2189 * cell on the screen, so following cells must not be drawn by marking them as
2190 * padding.
2191 *
2192 * So far, so good. The problem is, when overwriting a padding cell, or a UTF-8
2193 * character, it is necessary to also overwrite any other cells which covered
2194 * by the same character.
2195 */
2196 static int
2197 screen_write_overwrite(struct screen_write_ctx *ctx, struct grid_cell *gc,
2198 u_int width)
2199 {
2200 struct screen *s = ctx->s;
2201 struct grid *gd = s->grid;
2202 struct grid_cell tmp_gc;
2203 u_int xx;
2204 int done = 0;
2205
2206 if (gc->flags & GRID_FLAG_PADDING) {
2207 /*
2208 * A padding cell, so clear any following and leading padding
2209 * cells back to the character. Don't overwrite the current
2210 * cell as that happens later anyway.
2211 */
2212 xx = s->cx + 1;
2213 while (--xx > 0) {
2214 grid_view_get_cell(gd, xx, s->cy, &tmp_gc);
2215 if (~tmp_gc.flags & GRID_FLAG_PADDING)
2216 break;
2217 log_debug("%s: padding at %u,%u", __func__, xx, s->cy);
2218 grid_view_set_cell(gd, xx, s->cy, &grid_default_cell);
2219 }
2220
2221 /* Overwrite the character at the start of this padding. */
2222 log_debug("%s: character at %u,%u", __func__, xx, s->cy);
2223 grid_view_set_cell(gd, xx, s->cy, &grid_default_cell);
2224 done = 1;
2225 }
2226
2227 /*
2228 * Overwrite any padding cells that belong to any UTF-8 characters
2229 * we'll be overwriting with the current character.
2230 */
2231 if (width != 1 ||
2232 gc->data.width != 1 ||
2233 gc->flags & GRID_FLAG_PADDING) {
2234 xx = s->cx + width - 1;
2235 while (++xx < screen_size_x(s)) {
2236 grid_view_get_cell(gd, xx, s->cy, &tmp_gc);
2237 if (~tmp_gc.flags & GRID_FLAG_PADDING)
2238 break;
2239 log_debug("%s: overwrite at %u,%u", __func__, xx,
2240 s->cy);
2241 if (gc->flags & GRID_FLAG_TAB) {
2242 memcpy(&tmp_gc, gc, sizeof tmp_gc);
2243 memset(tmp_gc.data.data, 0,
2244 sizeof tmp_gc.data.data);
2245 *tmp_gc.data.data = ' ';
2246 tmp_gc.data.width = tmp_gc.data.size =
2247 tmp_gc.data.have = 1;
2248 grid_view_set_cell(gd, xx, s->cy, &tmp_gc);
2249 } else
2250 grid_view_set_cell(gd, xx, s->cy,
2251 &grid_default_cell);
2252 done = 1;
2253 }
2254 }
2255
2256 return (done);
2257 }
2258
2259 /* Set external clipboard. */
2260 void
2261 screen_write_setselection(struct screen_write_ctx *ctx, const char *flags,
2262 u_char *str, u_int len)
2263 {
2264 struct tty_ctx ttyctx;
2265
2266 screen_write_initctx(ctx, &ttyctx, 0);
2267 ttyctx.ptr = str;
2268 ttyctx.ptr2 = (void *)flags;
2269 ttyctx.num = len;
2270
2271 tty_write(tty_cmd_setselection, &ttyctx);
2272 }
2273
2274 /* Write unmodified string. */
2275 void
2276 screen_write_rawstring(struct screen_write_ctx *ctx, u_char *str, u_int len,
2277 int allow_invisible_panes)
2278 {
2279 struct tty_ctx ttyctx;
2280
2281 screen_write_initctx(ctx, &ttyctx, 0);
2282 ttyctx.ptr = str;
2283 ttyctx.num = len;
2284 ttyctx.allow_invisible_panes = allow_invisible_panes;
2285
2286 tty_write(tty_cmd_rawstring, &ttyctx);
2287 }
2288
2289 #ifdef ENABLE_SIXEL
2290 /* Write a SIXEL image. */
2291 void
2292 screen_write_sixelimage(struct screen_write_ctx *ctx, struct sixel_image *si,
2293 u_int bg)
2294 {
2295 struct screen *s = ctx->s;
2296 struct grid *gd = s->grid;
2297 struct tty_ctx ttyctx;
2298 u_int x, y, sx, sy, cx = s->cx, cy = s->cy, i, lines;
2299 struct sixel_image *new;
2300
2301 sixel_size_in_cells(si, &x, &y);
2302 if (x > screen_size_x(s) || y > screen_size_y(s)) {
2303 if (x > screen_size_x(s) - cx)
2304 sx = screen_size_x(s) - cx;
2305 else
2306 sx = x;
2307 if (y > screen_size_y(s) - 1)
2308 sy = screen_size_y(s) - 1;
2309 else
2310 sy = y;
2311 new = sixel_scale(si, 0, 0, 0, y - sy, sx, sy, 1);
2312 sixel_free(si);
2313 si = new;
2314
2315 /* Bail out if the image cannot be scaled. */
2316 if (si == NULL)
2317 return;
2318 sixel_size_in_cells(si, &x, &y);
2319 }
2320
2321 sy = screen_size_y(s) - cy;
2322 if (sy < y) {
2323 lines = y - sy + 1;
2324 if (image_scroll_up(s, lines) && ctx->wp != NULL)
2325 ctx->wp->flags |= PANE_REDRAW;
2326 for (i = 0; i < lines; i++) {
2327 grid_view_scroll_region_up(gd, 0, screen_size_y(s) - 1,
2328 bg);
2329 screen_write_collect_scroll(ctx, bg);
2330 }
2331 ctx->scrolled += lines;
2332 if (lines > cy)
2333 screen_write_cursormove(ctx, -1, 0, 0);
2334 else
2335 screen_write_cursormove(ctx, -1, cy - lines, 0);
2336 }
2337 screen_write_collect_flush(ctx, 0, __func__);
2338
2339 screen_write_initctx(ctx, &ttyctx, 0);
2340 ttyctx.ptr = image_store(s, si);
2341
2342 tty_write(tty_cmd_sixelimage, &ttyctx);
2343
2344 screen_write_cursormove(ctx, 0, cy + y, 0);
2345 }
2346 #endif
2347
2348 /* Turn alternate screen on. */
2349 void
2350 screen_write_alternateon(struct screen_write_ctx *ctx, struct grid_cell *gc,
2351 int cursor)
2352 {
2353 struct tty_ctx ttyctx;
2354 struct window_pane *wp = ctx->wp;
2355
2356 if (wp != NULL && !options_get_number(wp->options, "alternate-screen"))
2357 return;
2358
2359 screen_write_collect_flush(ctx, 0, __func__);
2360 screen_alternate_on(ctx->s, gc, cursor);
2361
2362 if (wp != NULL)
2363 layout_fix_panes(wp->window, NULL);
2364
2365 screen_write_initctx(ctx, &ttyctx, 1);
2366 if (ttyctx.redraw_cb != NULL)
2367 ttyctx.redraw_cb(&ttyctx);
2368 }
2369
2370 /* Turn alternate screen off. */
2371 void
2372 screen_write_alternateoff(struct screen_write_ctx *ctx, struct grid_cell *gc,
2373 int cursor)
2374 {
2375 struct tty_ctx ttyctx;
2376 struct window_pane *wp = ctx->wp;
2377
2378 if (wp != NULL && !options_get_number(wp->options, "alternate-screen"))
2379 return;
2380
2381 screen_write_collect_flush(ctx, 0, __func__);
2382 screen_alternate_off(ctx->s, gc, cursor);
2383
2384 if (wp != NULL)
2385 layout_fix_panes(wp->window, NULL);
2386
2387 screen_write_initctx(ctx, &ttyctx, 1);
2388 if (ttyctx.redraw_cb != NULL)
2389 ttyctx.redraw_cb(&ttyctx);
2390 }
tmux -- terminal multiplexer similar to GNU Screen