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Fix exit message if creating socket fails.
[tmux-openbsd.git] / screen-write.c
blob6b6a750ee5935b8543ec020d0a1ef765efeefd59
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
34 static int screen_write_overwrite(struct screen_write_ctx *,
35 struct grid_cell *, u_int);
36 static const struct grid_cell *screen_write_combine(struct screen_write_ctx *,
37 const struct utf8_data *, u_int *);
38
39 struct screen_write_citem {
40 u_int x;
41 int wrapped;
42
43 enum { TEXT, CLEAR } type;
44 u_int used;
45 u_int bg;
46
47 struct grid_cell gc;
48
49 TAILQ_ENTRY(screen_write_citem) entry;
50 };
51 struct screen_write_cline {
52 char *data;
53 TAILQ_HEAD(, screen_write_citem) items;
54 };
55 TAILQ_HEAD(, screen_write_citem) screen_write_citem_freelist =
56 TAILQ_HEAD_INITIALIZER(screen_write_citem_freelist);
57
58 static struct screen_write_citem *
59 screen_write_get_citem(void)
60 {
61 struct screen_write_citem *ci;
62
63 ci = TAILQ_FIRST(&screen_write_citem_freelist);
64 if (ci != NULL) {
65 TAILQ_REMOVE(&screen_write_citem_freelist, ci, entry);
66 memset(ci, 0, sizeof *ci);
67 return (ci);
68 }
69 return (xcalloc(1, sizeof *ci));
70 }
71
72 static void
73 screen_write_free_citem(struct screen_write_citem *ci)
74 {
75 TAILQ_INSERT_TAIL(&screen_write_citem_freelist, ci, entry);
76 }
77
78 static void
79 screen_write_offset_timer(__unused int fd, __unused short events, void *data)
80 {
81 struct window *w = data;
82
83 tty_update_window_offset(w);
84 }
85
86 /* Set cursor position. */
87 static void
88 screen_write_set_cursor(struct screen_write_ctx *ctx, int cx, int cy)
89 {
90 struct window_pane *wp = ctx->wp;
91 struct window *w;
92 struct screen *s = ctx->s;
93 struct timeval tv = { .tv_usec = 10000 };
94
95 if (cx != -1 && (u_int)cx == s->cx && cy != -1 && (u_int)cy == s->cy)
96 return;
97
98 if (cx != -1) {
99 if ((u_int)cx > screen_size_x(s)) /* allow last column */
100 cx = screen_size_x(s) - 1;
101 s->cx = cx;
102 }
103 if (cy != -1) {
104 if ((u_int)cy > screen_size_y(s) - 1)
105 cy = screen_size_y(s) - 1;
106 s->cy = cy;
107 }
108
109 if (wp == NULL)
110 return;
111 w = wp->window;
112
113 if (!event_initialized(&w->offset_timer))
114 evtimer_set(&w->offset_timer, screen_write_offset_timer, w);
115 if (!evtimer_pending(&w->offset_timer, NULL))
116 evtimer_add(&w->offset_timer, &tv);
117 }
118
119 /* Do a full redraw. */
120 static void
121 screen_write_redraw_cb(const struct tty_ctx *ttyctx)
122 {
123 struct window_pane *wp = ttyctx->arg;
124
125 if (wp != NULL)
126 wp->flags |= PANE_REDRAW;
127 }
128
129 /* Update context for client. */
130 static int
131 screen_write_set_client_cb(struct tty_ctx *ttyctx, struct client *c)
132 {
133 struct window_pane *wp = ttyctx->arg;
134
135 if (c->session->curw->window != wp->window)
136 return (0);
137 if (wp->layout_cell == NULL)
138 return (0);
139
140 if (wp->flags & (PANE_REDRAW|PANE_DROP))
141 return (-1);
142 if (c->flags & CLIENT_REDRAWPANES) {
143 /*
144 * Redraw is already deferred to redraw another pane - redraw
145 * this one also when that happens.
146 */
147 log_debug("%s: adding %%%u to deferred redraw", __func__,
148 wp->id);
149 wp->flags |= PANE_REDRAW;
150 return (-1);
151 }
152
153 ttyctx->bigger = tty_window_offset(&c->tty, &ttyctx->wox, &ttyctx->woy,
154 &ttyctx->wsx, &ttyctx->wsy);
155
156 ttyctx->xoff = ttyctx->rxoff = wp->xoff;
157 ttyctx->yoff = ttyctx->ryoff = wp->yoff;
158
159 if (status_at_line(c) == 0)
160 ttyctx->yoff += status_line_size(c);
161
162 return (1);
163 }
164
165 /* Set up context for TTY command. */
166 static void
167 screen_write_initctx(struct screen_write_ctx *ctx, struct tty_ctx *ttyctx,
168 int sync)
169 {
170 struct screen *s = ctx->s;
171
172 memset(ttyctx, 0, sizeof *ttyctx);
173
174 ttyctx->s = s;
175 ttyctx->sx = screen_size_x(s);
176 ttyctx->sy = screen_size_y(s);
177
178 ttyctx->ocx = s->cx;
179 ttyctx->ocy = s->cy;
180 ttyctx->orlower = s->rlower;
181 ttyctx->orupper = s->rupper;
182
183 memcpy(&ttyctx->defaults, &grid_default_cell, sizeof ttyctx->defaults);
184 if (ctx->init_ctx_cb != NULL) {
185 ctx->init_ctx_cb(ctx, ttyctx);
186 if (ttyctx->palette != NULL) {
187 if (ttyctx->defaults.fg == 8)
188 ttyctx->defaults.fg = ttyctx->palette->fg;
189 if (ttyctx->defaults.bg == 8)
190 ttyctx->defaults.bg = ttyctx->palette->bg;
191 }
192 } else {
193 ttyctx->redraw_cb = screen_write_redraw_cb;
194 if (ctx->wp != NULL) {
195 tty_default_colours(&ttyctx->defaults, ctx->wp);
196 ttyctx->palette = &ctx->wp->palette;
197 ttyctx->set_client_cb = screen_write_set_client_cb;
198 ttyctx->arg = ctx->wp;
199 }
200 }
201
202 if (~ctx->flags & SCREEN_WRITE_SYNC) {
203 /*
204 * For the active pane or for an overlay (no pane), we want to
205 * only use synchronized updates if requested (commands that
206 * move the cursor); for other panes, always use it, since the
207 * cursor will have to move.
208 */
209 if (ctx->wp != NULL) {
210 if (ctx->wp != ctx->wp->window->active)
211 ttyctx->num = 1;
212 else
213 ttyctx->num = sync;
214 } else
215 ttyctx->num = 0x10|sync;
216 tty_write(tty_cmd_syncstart, ttyctx);
217 ctx->flags |= SCREEN_WRITE_SYNC;
218 }
219 }
220
221 /* Make write list. */
222 void
223 screen_write_make_list(struct screen *s)
224 {
225 u_int y;
226
227 s->write_list = xcalloc(screen_size_y(s), sizeof *s->write_list);
228 for (y = 0; y < screen_size_y(s); y++)
229 TAILQ_INIT(&s->write_list[y].items);
230 }
231
232 /* Free write list. */
233 void
234 screen_write_free_list(struct screen *s)
235 {
236 u_int y;
237
238 for (y = 0; y < screen_size_y(s); y++)
239 free(s->write_list[y].data);
240 free(s->write_list);
241 }
242
243 /* Set up for writing. */
244 static void
245 screen_write_init(struct screen_write_ctx *ctx, struct screen *s)
246 {
247 memset(ctx, 0, sizeof *ctx);
248
249 ctx->s = s;
250
251 if (ctx->s->write_list == NULL)
252 screen_write_make_list(ctx->s);
253 ctx->item = screen_write_get_citem();
254
255 ctx->scrolled = 0;
256 ctx->bg = 8;
257 }
258
259 /* Initialize writing with a pane. */
260 void
261 screen_write_start_pane(struct screen_write_ctx *ctx, struct window_pane *wp,
262 struct screen *s)
263 {
264 if (s == NULL)
265 s = wp->screen;
266 screen_write_init(ctx, s);
267 ctx->wp = wp;
268
269 if (log_get_level() != 0) {
270 log_debug("%s: size %ux%u, pane %%%u (at %u,%u)",
271 __func__, screen_size_x(ctx->s), screen_size_y(ctx->s),
272 wp->id, wp->xoff, wp->yoff);
273 }
274 }
275
276 /* Initialize writing with a callback. */
277 void
278 screen_write_start_callback(struct screen_write_ctx *ctx, struct screen *s,
279 screen_write_init_ctx_cb cb, void *arg)
280 {
281 screen_write_init(ctx, s);
282
283 ctx->init_ctx_cb = cb;
284 ctx->arg = arg;
285
286 if (log_get_level() != 0) {
287 log_debug("%s: size %ux%u, with callback", __func__,
288 screen_size_x(ctx->s), screen_size_y(ctx->s));
289 }
290 }
291
292 /* Initialize writing. */
293 void
294 screen_write_start(struct screen_write_ctx *ctx, struct screen *s)
295 {
296 screen_write_init(ctx, s);
297
298 if (log_get_level() != 0) {
299 log_debug("%s: size %ux%u, no pane", __func__,
300 screen_size_x(ctx->s), screen_size_y(ctx->s));
301 }
302 }
303
304 /* Finish writing. */
305 void
306 screen_write_stop(struct screen_write_ctx *ctx)
307 {
308 screen_write_collect_end(ctx);
309 screen_write_collect_flush(ctx, 0, __func__);
310
311 screen_write_free_citem(ctx->item);
312 }
313
314 /* Reset screen state. */
315 void
316 screen_write_reset(struct screen_write_ctx *ctx)
317 {
318 struct screen *s = ctx->s;
319
320 screen_reset_tabs(s);
321 screen_write_scrollregion(ctx, 0, screen_size_y(s) - 1);
322
323 s->mode = MODE_CURSOR | MODE_WRAP;
324
325 screen_write_clearscreen(ctx, 8);
326 screen_write_set_cursor(ctx, 0, 0);
327 }
328
329 /* Write character. */
330 void
331 screen_write_putc(struct screen_write_ctx *ctx, const struct grid_cell *gcp,
332 u_char ch)
333 {
334 struct grid_cell gc;
335
336 memcpy(&gc, gcp, sizeof gc);
337
338 utf8_set(&gc.data, ch);
339 screen_write_cell(ctx, &gc);
340 }
341
342 /* Calculate string length. */
343 size_t
344 screen_write_strlen(const char *fmt, ...)
345 {
346 va_list ap;
347 char *msg;
348 struct utf8_data ud;
349 u_char *ptr;
350 size_t left, size = 0;
351 enum utf8_state more;
352
353 va_start(ap, fmt);
354 xvasprintf(&msg, fmt, ap);
355 va_end(ap);
356
357 ptr = msg;
358 while (*ptr != '\0') {
359 if (*ptr > 0x7f && utf8_open(&ud, *ptr) == UTF8_MORE) {
360 ptr++;
361
362 left = strlen(ptr);
363 if (left < (size_t)ud.size - 1)
364 break;
365 while ((more = utf8_append(&ud, *ptr)) == UTF8_MORE)
366 ptr++;
367 ptr++;
368
369 if (more == UTF8_DONE)
370 size += ud.width;
371 } else {
372 if (*ptr > 0x1f && *ptr < 0x7f)
373 size++;
374 ptr++;
375 }
376 }
377
378 free(msg);
379 return (size);
380 }
381
382 /* Write string wrapped over lines. */
383 int
384 screen_write_text(struct screen_write_ctx *ctx, u_int cx, u_int width,
385 u_int lines, int more, const struct grid_cell *gcp, const char *fmt, ...)
386 {
387 struct screen *s = ctx->s;
388 va_list ap;
389 char *tmp;
390 u_int cy = s->cy, i, end, next, idx = 0, at, left;
391 struct utf8_data *text;
392 struct grid_cell gc;
393
394 memcpy(&gc, gcp, sizeof gc);
395
396 va_start(ap, fmt);
397 xvasprintf(&tmp, fmt, ap);
398 va_end(ap);
399
400 text = utf8_fromcstr(tmp);
401 free(tmp);
402
403 left = (cx + width) - s->cx;
404 for (;;) {
405 /* Find the end of what can fit on the line. */
406 at = 0;
407 for (end = idx; text[end].size != 0; end++) {
408 if (text[end].size == 1 && text[end].data[0] == '\n')
409 break;
410 if (at + text[end].width > left)
411 break;
412 at += text[end].width;
413 }
414
415 /*
416 * If we're on a space, that's the end. If not, walk back to
417 * try and find one.
418 */
419 if (text[end].size == 0)
420 next = end;
421 else if (text[end].size == 1 && text[end].data[0] == '\n')
422 next = end + 1;
423 else if (text[end].size == 1 && text[end].data[0] == ' ')
424 next = end + 1;
425 else {
426 for (i = end; i > idx; i--) {
427 if (text[i].size == 1 && text[i].data[0] == ' ')
428 break;
429 }
430 if (i != idx) {
431 next = i + 1;
432 end = i;
433 } else
434 next = end;
435 }
436
437 /* Print the line. */
438 for (i = idx; i < end; i++) {
439 utf8_copy(&gc.data, &text[i]);
440 screen_write_cell(ctx, &gc);
441 }
442
443 /* If at the bottom, stop. */
444 idx = next;
445 if (s->cy == cy + lines - 1 || text[idx].size == 0)
446 break;
447
448 screen_write_cursormove(ctx, cx, s->cy + 1, 0);
449 left = width;
450 }
451
452 /*
453 * Fail if on the last line and there is more to come or at the end, or
454 * if the text was not entirely consumed.
455 */
456 if ((s->cy == cy + lines - 1 && (!more || s->cx == cx + width)) ||
457 text[idx].size != 0) {
458 free(text);
459 return (0);
460 }
461 free(text);
462
463 /*
464 * If no more to come, move to the next line. Otherwise, leave on
465 * the same line (except if at the end).
466 */
467 if (!more || s->cx == cx + width)
468 screen_write_cursormove(ctx, cx, s->cy + 1, 0);
469 return (1);
470 }
471
472 /* Write simple string (no maximum length). */
473 void
474 screen_write_puts(struct screen_write_ctx *ctx, const struct grid_cell *gcp,
475 const char *fmt, ...)
476 {
477 va_list ap;
478
479 va_start(ap, fmt);
480 screen_write_vnputs(ctx, -1, gcp, fmt, ap);
481 va_end(ap);
482 }
483
484 /* Write string with length limit (-1 for unlimited). */
485 void
486 screen_write_nputs(struct screen_write_ctx *ctx, ssize_t maxlen,
487 const struct grid_cell *gcp, const char *fmt, ...)
488 {
489 va_list ap;
490
491 va_start(ap, fmt);
492 screen_write_vnputs(ctx, maxlen, gcp, fmt, ap);
493 va_end(ap);
494 }
495
496 void
497 screen_write_vnputs(struct screen_write_ctx *ctx, ssize_t maxlen,
498 const struct grid_cell *gcp, const char *fmt, va_list ap)
499 {
500 struct grid_cell gc;
501 struct utf8_data *ud = &gc.data;
502 char *msg;
503 u_char *ptr;
504 size_t left, size = 0;
505 enum utf8_state more;
506
507 memcpy(&gc, gcp, sizeof gc);
508 xvasprintf(&msg, fmt, ap);
509
510 ptr = msg;
511 while (*ptr != '\0') {
512 if (*ptr > 0x7f && utf8_open(ud, *ptr) == UTF8_MORE) {
513 ptr++;
514
515 left = strlen(ptr);
516 if (left < (size_t)ud->size - 1)
517 break;
518 while ((more = utf8_append(ud, *ptr)) == UTF8_MORE)
519 ptr++;
520 ptr++;
521
522 if (more != UTF8_DONE)
523 continue;
524 if (maxlen > 0 && size + ud->width > (size_t)maxlen) {
525 while (size < (size_t)maxlen) {
526 screen_write_putc(ctx, &gc, ' ');
527 size++;
528 }
529 break;
530 }
531 size += ud->width;
532 screen_write_cell(ctx, &gc);
533 } else {
534 if (maxlen > 0 && size + 1 > (size_t)maxlen)
535 break;
536
537 if (*ptr == '\001')
538 gc.attr ^= GRID_ATTR_CHARSET;
539 else if (*ptr == '\n') {
540 screen_write_linefeed(ctx, 0, 8);
541 screen_write_carriagereturn(ctx);
542 } else if (*ptr > 0x1f && *ptr < 0x7f) {
543 size++;
544 screen_write_putc(ctx, &gc, *ptr);
545 }
546 ptr++;
547 }
548 }
549
550 free(msg);
551 }
552
553 /*
554 * Copy from another screen but without the selection stuff. Assumes the target
555 * region is already big enough.
556 */
557 void
558 screen_write_fast_copy(struct screen_write_ctx *ctx, struct screen *src,
559 u_int px, u_int py, u_int nx, u_int ny)
560 {
561 struct screen *s = ctx->s;
562 struct grid *gd = src->grid;
563 struct grid_cell gc;
564 u_int xx, yy, cx, cy;
565
566 if (nx == 0 || ny == 0)
567 return;
568
569 cy = s->cy;
570 for (yy = py; yy < py + ny; yy++) {
571 if (yy >= gd->hsize + gd->sy)
572 break;
573 cx = s->cx;
574 for (xx = px; xx < px + nx; xx++) {
575 if (xx >= grid_get_line(gd, yy)->cellsize)
576 break;
577 grid_get_cell(gd, xx, yy, &gc);
578 if (xx + gc.data.width > px + nx)
579 break;
580 grid_view_set_cell(ctx->s->grid, cx, cy, &gc);
581 cx++;
582 }
583 cy++;
584 }
585 }
586
587 /* Draw a horizontal line on screen. */
588 void
589 screen_write_hline(struct screen_write_ctx *ctx, u_int nx, int left, int right)
590 {
591 struct screen *s = ctx->s;
592 struct grid_cell gc;
593 u_int cx, cy, i;
594
595 cx = s->cx;
596 cy = s->cy;
597
598 memcpy(&gc, &grid_default_cell, sizeof gc);
599 gc.attr |= GRID_ATTR_CHARSET;
600
601 screen_write_putc(ctx, &gc, left ? 't' : 'q');
602 for (i = 1; i < nx - 1; i++)
603 screen_write_putc(ctx, &gc, 'q');
604 screen_write_putc(ctx, &gc, right ? 'u' : 'q');
605
606 screen_write_set_cursor(ctx, cx, cy);
607 }
608
609 /* Draw a vertical line on screen. */
610 void
611 screen_write_vline(struct screen_write_ctx *ctx, u_int ny, int top, int bottom)
612 {
613 struct screen *s = ctx->s;
614 struct grid_cell gc;
615 u_int cx, cy, i;
616
617 cx = s->cx;
618 cy = s->cy;
619
620 memcpy(&gc, &grid_default_cell, sizeof gc);
621 gc.attr |= GRID_ATTR_CHARSET;
622
623 screen_write_putc(ctx, &gc, top ? 'w' : 'x');
624 for (i = 1; i < ny - 1; i++) {
625 screen_write_set_cursor(ctx, cx, cy + i);
626 screen_write_putc(ctx, &gc, 'x');
627 }
628 screen_write_set_cursor(ctx, cx, cy + ny - 1);
629 screen_write_putc(ctx, &gc, bottom ? 'v' : 'x');
630
631 screen_write_set_cursor(ctx, cx, cy);
632 }
633
634 /* Draw a menu on screen. */
635 void
636 screen_write_menu(struct screen_write_ctx *ctx, struct menu *menu,
637 int choice, const struct grid_cell *choice_gc)
638 {
639 struct screen *s = ctx->s;
640 struct grid_cell default_gc;
641 const struct grid_cell *gc = &default_gc;
642 u_int cx, cy, i, j;
643 const char *name;
644
645 cx = s->cx;
646 cy = s->cy;
647
648 memcpy(&default_gc, &grid_default_cell, sizeof default_gc);
649
650 screen_write_box(ctx, menu->width + 4, menu->count + 2,
651 BOX_LINES_DEFAULT, &default_gc, menu->title);
652
653 for (i = 0; i < menu->count; i++) {
654 name = menu->items[i].name;
655 if (name == NULL) {
656 screen_write_cursormove(ctx, cx, cy + 1 + i, 0);
657 screen_write_hline(ctx, menu->width + 4, 1, 1);
658 } else {
659 if (choice >= 0 && i == (u_int)choice && *name != '-')
660 gc = choice_gc;
661 screen_write_cursormove(ctx, cx + 2, cy + 1 + i, 0);
662 for (j = 0; j < menu->width; j++)
663 screen_write_putc(ctx, gc, ' ');
664 screen_write_cursormove(ctx, cx + 2, cy + 1 + i, 0);
665 if (*name == '-') {
666 name++;
667 default_gc.attr |= GRID_ATTR_DIM;
668 format_draw(ctx, gc, menu->width, name, NULL,
669 0);
670 default_gc.attr &= ~GRID_ATTR_DIM;
671 } else
672 format_draw(ctx, gc, menu->width, name, NULL,
673 gc == choice_gc);
674 gc = &default_gc;
675 }
676 }
677
678 screen_write_set_cursor(ctx, cx, cy);
679 }
680
681 static void
682 screen_write_box_border_set(enum box_lines box_lines, int cell_type,
683 struct grid_cell *gc)
684 {
685 switch (box_lines) {
686 case BOX_LINES_NONE:
687 break;
688 case BOX_LINES_DOUBLE:
689 gc->attr &= ~GRID_ATTR_CHARSET;
690 utf8_copy(&gc->data, tty_acs_double_borders(cell_type));
691 break;
692 case BOX_LINES_HEAVY:
693 gc->attr &= ~GRID_ATTR_CHARSET;
694 utf8_copy(&gc->data, tty_acs_heavy_borders(cell_type));
695 break;
696 case BOX_LINES_ROUNDED:
697 gc->attr &= ~GRID_ATTR_CHARSET;
698 utf8_copy(&gc->data, tty_acs_rounded_borders(cell_type));
699 break;
700 case BOX_LINES_SIMPLE:
701 gc->attr &= ~GRID_ATTR_CHARSET;
702 utf8_set(&gc->data, SIMPLE_BORDERS[cell_type]);
703 break;
704 case BOX_LINES_PADDED:
705 gc->attr &= ~GRID_ATTR_CHARSET;
706 utf8_set(&gc->data, PADDED_BORDERS[cell_type]);
707 break;
708 case BOX_LINES_SINGLE:
709 case BOX_LINES_DEFAULT:
710 gc->attr |= GRID_ATTR_CHARSET;
711 utf8_set(&gc->data, CELL_BORDERS[cell_type]);
712 break;
713 }
714 }
715
716 /* Draw a box on screen. */
717 void
718 screen_write_box(struct screen_write_ctx *ctx, u_int nx, u_int ny,
719 enum box_lines lines, const struct grid_cell *gcp, const char *title)
720 {
721 struct screen *s = ctx->s;
722 struct grid_cell gc;
723 u_int cx, cy, i;
724
725 cx = s->cx;
726 cy = s->cy;
727
728 if (gcp != NULL)
729 memcpy(&gc, gcp, sizeof gc);
730 else
731 memcpy(&gc, &grid_default_cell, sizeof gc);
732
733 gc.attr |= GRID_ATTR_CHARSET;
734 gc.flags |= GRID_FLAG_NOPALETTE;
735
736 /* Draw top border */
737 screen_write_box_border_set(lines, CELL_TOPLEFT, &gc);
738 screen_write_cell(ctx, &gc);
739 screen_write_box_border_set(lines, CELL_LEFTRIGHT, &gc);
740 for (i = 1; i < nx - 1; i++)
741 screen_write_cell(ctx, &gc);
742 screen_write_box_border_set(lines, CELL_TOPRIGHT, &gc);
743 screen_write_cell(ctx, &gc);
744
745 /* Draw bottom border */
746 screen_write_set_cursor(ctx, cx, cy + ny - 1);
747 screen_write_box_border_set(lines, CELL_BOTTOMLEFT, &gc);
748 screen_write_cell(ctx, &gc);
749 screen_write_box_border_set(lines, CELL_LEFTRIGHT, &gc);
750 for (i = 1; i < nx - 1; i++)
751 screen_write_cell(ctx, &gc);
752 screen_write_box_border_set(lines, CELL_BOTTOMRIGHT, &gc);
753 screen_write_cell(ctx, &gc);
754
755 /* Draw sides */
756 screen_write_box_border_set(lines, CELL_TOPBOTTOM, &gc);
757 for (i = 1; i < ny - 1; i++) {
758 /* left side */
759 screen_write_set_cursor(ctx, cx, cy + i);
760 screen_write_cell(ctx, &gc);
761 /* right side */
762 screen_write_set_cursor(ctx, cx + nx - 1, cy + i);
763 screen_write_cell(ctx, &gc);
764 }
765
766 if (title != NULL) {
767 gc.attr &= ~GRID_ATTR_CHARSET;
768 screen_write_cursormove(ctx, cx + 2, cy, 0);
769 format_draw(ctx, &gc, nx - 4, title, NULL, 0);
770 }
771
772 screen_write_set_cursor(ctx, cx, cy);
773 }
774
775 /*
776 * Write a preview version of a window. Assumes target area is big enough and
777 * already cleared.
778 */
779 void
780 screen_write_preview(struct screen_write_ctx *ctx, struct screen *src, u_int nx,
781 u_int ny)
782 {
783 struct screen *s = ctx->s;
784 struct grid_cell gc;
785 u_int cx, cy, px, py;
786
787 cx = s->cx;
788 cy = s->cy;
789
790 /*
791 * If the cursor is on, pick the area around the cursor, otherwise use
792 * the top left.
793 */
794 if (src->mode & MODE_CURSOR) {
795 px = src->cx;
796 if (px < nx / 3)
797 px = 0;
798 else
799 px = px - nx / 3;
800 if (px + nx > screen_size_x(src)) {
801 if (nx > screen_size_x(src))
802 px = 0;
803 else
804 px = screen_size_x(src) - nx;
805 }
806 py = src->cy;
807 if (py < ny / 3)
808 py = 0;
809 else
810 py = py - ny / 3;
811 if (py + ny > screen_size_y(src)) {
812 if (ny > screen_size_y(src))
813 py = 0;
814 else
815 py = screen_size_y(src) - ny;
816 }
817 } else {
818 px = 0;
819 py = 0;
820 }
821
822 screen_write_fast_copy(ctx, src, px, src->grid->hsize + py, nx, ny);
823
824 if (src->mode & MODE_CURSOR) {
825 grid_view_get_cell(src->grid, src->cx, src->cy, &gc);
826 gc.attr |= GRID_ATTR_REVERSE;
827 screen_write_set_cursor(ctx, cx + (src->cx - px),
828 cy + (src->cy - py));
829 screen_write_cell(ctx, &gc);
830 }
831 }
832
833 /* Set a mode. */
834 void
835 screen_write_mode_set(struct screen_write_ctx *ctx, int mode)
836 {
837 struct screen *s = ctx->s;
838
839 s->mode |= mode;
840
841 if (log_get_level() != 0)
842 log_debug("%s: %s", __func__, screen_mode_to_string(mode));
843 }
844
845 /* Clear a mode. */
846 void
847 screen_write_mode_clear(struct screen_write_ctx *ctx, int mode)
848 {
849 struct screen *s = ctx->s;
850
851 s->mode &= ~mode;
852
853 if (log_get_level() != 0)
854 log_debug("%s: %s", __func__, screen_mode_to_string(mode));
855 }
856
857 /* Cursor up by ny. */
858 void
859 screen_write_cursorup(struct screen_write_ctx *ctx, u_int ny)
860 {
861 struct screen *s = ctx->s;
862 u_int cx = s->cx, cy = s->cy;
863
864 if (ny == 0)
865 ny = 1;
866
867 if (cy < s->rupper) {
868 /* Above region. */
869 if (ny > cy)
870 ny = cy;
871 } else {
872 /* Below region. */
873 if (ny > cy - s->rupper)
874 ny = cy - s->rupper;
875 }
876 if (cx == screen_size_x(s))
877 cx--;
878
879 cy -= ny;
880
881 screen_write_set_cursor(ctx, cx, cy);
882 }
883
884 /* Cursor down by ny. */
885 void
886 screen_write_cursordown(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->rlower) {
895 /* Below region. */
896 if (ny > screen_size_y(s) - 1 - cy)
897 ny = screen_size_y(s) - 1 - cy;
898 } else {
899 /* Above region. */
900 if (ny > s->rlower - cy)
901 ny = s->rlower - cy;
902 }
903 if (cx == screen_size_x(s))
904 cx--;
905 else if (ny == 0)
906 return;
907
908 cy += ny;
909
910 screen_write_set_cursor(ctx, cx, cy);
911 }
912
913 /* Cursor right by nx. */
914 void
915 screen_write_cursorright(struct screen_write_ctx *ctx, u_int nx)
916 {
917 struct screen *s = ctx->s;
918 u_int cx = s->cx, cy = s->cy;
919
920 if (nx == 0)
921 nx = 1;
922
923 if (nx > screen_size_x(s) - 1 - cx)
924 nx = screen_size_x(s) - 1 - cx;
925 if (nx == 0)
926 return;
927
928 cx += nx;
929
930 screen_write_set_cursor(ctx, cx, cy);
931 }
932
933 /* Cursor left by nx. */
934 void
935 screen_write_cursorleft(struct screen_write_ctx *ctx, u_int nx)
936 {
937 struct screen *s = ctx->s;
938 u_int cx = s->cx, cy = s->cy;
939
940 if (nx == 0)
941 nx = 1;
942
943 if (nx > cx)
944 nx = cx;
945 if (nx == 0)
946 return;
947
948 cx -= nx;
949
950 screen_write_set_cursor(ctx, cx, cy);
951 }
952
953 /* Backspace; cursor left unless at start of wrapped line when can move up. */
954 void
955 screen_write_backspace(struct screen_write_ctx *ctx)
956 {
957 struct screen *s = ctx->s;
958 struct grid_line *gl;
959 u_int cx = s->cx, cy = s->cy;
960
961 if (cx == 0) {
962 if (cy == 0)
963 return;
964 gl = grid_get_line(s->grid, s->grid->hsize + cy - 1);
965 if (gl->flags & GRID_LINE_WRAPPED) {
966 cy--;
967 cx = screen_size_x(s) - 1;
968 }
969 } else
970 cx--;
971
972 screen_write_set_cursor(ctx, cx, cy);
973 }
974
975 /* VT100 alignment test. */
976 void
977 screen_write_alignmenttest(struct screen_write_ctx *ctx)
978 {
979 struct screen *s = ctx->s;
980 struct tty_ctx ttyctx;
981 struct grid_cell gc;
982 u_int xx, yy;
983
984 memcpy(&gc, &grid_default_cell, sizeof gc);
985 utf8_set(&gc.data, 'E');
986
987 for (yy = 0; yy < screen_size_y(s); yy++) {
988 for (xx = 0; xx < screen_size_x(s); xx++)
989 grid_view_set_cell(s->grid, xx, yy, &gc);
990 }
991
992 screen_write_set_cursor(ctx, 0, 0);
993
994 s->rupper = 0;
995 s->rlower = screen_size_y(s) - 1;
996
997 screen_write_initctx(ctx, &ttyctx, 1);
998
999 screen_write_collect_clear(ctx, 0, screen_size_y(s) - 1);
1000 tty_write(tty_cmd_alignmenttest, &ttyctx);
1001 }
1002
1003 /* Insert nx characters. */
1004 void
1005 screen_write_insertcharacter(struct screen_write_ctx *ctx, u_int nx, u_int bg)
1006 {
1007 struct screen *s = ctx->s;
1008 struct tty_ctx ttyctx;
1009
1010 if (nx == 0)
1011 nx = 1;
1012
1013 if (nx > screen_size_x(s) - s->cx)
1014 nx = screen_size_x(s) - s->cx;
1015 if (nx == 0)
1016 return;
1017
1018 if (s->cx > screen_size_x(s) - 1)
1019 return;
1020
1021 screen_write_initctx(ctx, &ttyctx, 0);
1022 ttyctx.bg = bg;
1023
1024 grid_view_insert_cells(s->grid, s->cx, s->cy, nx, bg);
1025
1026 screen_write_collect_flush(ctx, 0, __func__);
1027 ttyctx.num = nx;
1028 tty_write(tty_cmd_insertcharacter, &ttyctx);
1029 }
1030
1031 /* Delete nx characters. */
1032 void
1033 screen_write_deletecharacter(struct screen_write_ctx *ctx, u_int nx, u_int bg)
1034 {
1035 struct screen *s = ctx->s;
1036 struct tty_ctx ttyctx;
1037
1038 if (nx == 0)
1039 nx = 1;
1040
1041 if (nx > screen_size_x(s) - s->cx)
1042 nx = screen_size_x(s) - s->cx;
1043 if (nx == 0)
1044 return;
1045
1046 if (s->cx > screen_size_x(s) - 1)
1047 return;
1048
1049 screen_write_initctx(ctx, &ttyctx, 0);
1050 ttyctx.bg = bg;
1051
1052 grid_view_delete_cells(s->grid, s->cx, s->cy, nx, bg);
1053
1054 screen_write_collect_flush(ctx, 0, __func__);
1055 ttyctx.num = nx;
1056 tty_write(tty_cmd_deletecharacter, &ttyctx);
1057 }
1058
1059 /* Clear nx characters. */
1060 void
1061 screen_write_clearcharacter(struct screen_write_ctx *ctx, u_int nx, u_int bg)
1062 {
1063 struct screen *s = ctx->s;
1064 struct tty_ctx ttyctx;
1065
1066 if (nx == 0)
1067 nx = 1;
1068
1069 if (nx > screen_size_x(s) - s->cx)
1070 nx = screen_size_x(s) - s->cx;
1071 if (nx == 0)
1072 return;
1073
1074 if (s->cx > screen_size_x(s) - 1)
1075 return;
1076
1077 screen_write_initctx(ctx, &ttyctx, 0);
1078 ttyctx.bg = bg;
1079
1080 grid_view_clear(s->grid, s->cx, s->cy, nx, 1, bg);
1081
1082 screen_write_collect_flush(ctx, 0, __func__);
1083 ttyctx.num = nx;
1084 tty_write(tty_cmd_clearcharacter, &ttyctx);
1085 }
1086
1087 /* Insert ny lines. */
1088 void
1089 screen_write_insertline(struct screen_write_ctx *ctx, u_int ny, u_int bg)
1090 {
1091 struct screen *s = ctx->s;
1092 struct grid *gd = s->grid;
1093 struct tty_ctx ttyctx;
1094
1095 if (ny == 0)
1096 ny = 1;
1097
1098 if (s->cy < s->rupper || s->cy > s->rlower) {
1099 if (ny > screen_size_y(s) - s->cy)
1100 ny = screen_size_y(s) - s->cy;
1101 if (ny == 0)
1102 return;
1103
1104 screen_write_initctx(ctx, &ttyctx, 1);
1105 ttyctx.bg = bg;
1106
1107 grid_view_insert_lines(gd, s->cy, ny, bg);
1108
1109 screen_write_collect_flush(ctx, 0, __func__);
1110 ttyctx.num = ny;
1111 tty_write(tty_cmd_insertline, &ttyctx);
1112 return;
1113 }
1114
1115 if (ny > s->rlower + 1 - s->cy)
1116 ny = s->rlower + 1 - s->cy;
1117 if (ny == 0)
1118 return;
1119
1120 screen_write_initctx(ctx, &ttyctx, 1);
1121 ttyctx.bg = bg;
1122
1123 if (s->cy < s->rupper || s->cy > s->rlower)
1124 grid_view_insert_lines(gd, s->cy, ny, bg);
1125 else
1126 grid_view_insert_lines_region(gd, s->rlower, s->cy, ny, bg);
1127
1128 screen_write_collect_flush(ctx, 0, __func__);
1129
1130 ttyctx.num = ny;
1131 tty_write(tty_cmd_insertline, &ttyctx);
1132 }
1133
1134 /* Delete ny lines. */
1135 void
1136 screen_write_deleteline(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 if (ny == 0)
1143 ny = 1;
1144
1145 if (s->cy < s->rupper || s->cy > s->rlower) {
1146 if (ny > screen_size_y(s) - s->cy)
1147 ny = screen_size_y(s) - s->cy;
1148 if (ny == 0)
1149 return;
1150
1151 screen_write_initctx(ctx, &ttyctx, 1);
1152 ttyctx.bg = bg;
1153
1154 grid_view_delete_lines(gd, s->cy, ny, bg);
1155
1156 screen_write_collect_flush(ctx, 0, __func__);
1157 ttyctx.num = ny;
1158 tty_write(tty_cmd_deleteline, &ttyctx);
1159 return;
1160 }
1161
1162 if (ny > s->rlower + 1 - s->cy)
1163 ny = s->rlower + 1 - s->cy;
1164 if (ny == 0)
1165 return;
1166
1167 screen_write_initctx(ctx, &ttyctx, 1);
1168 ttyctx.bg = bg;
1169
1170 if (s->cy < s->rupper || s->cy > s->rlower)
1171 grid_view_delete_lines(gd, s->cy, ny, bg);
1172 else
1173 grid_view_delete_lines_region(gd, s->rlower, s->cy, ny, bg);
1174
1175 screen_write_collect_flush(ctx, 0, __func__);
1176 ttyctx.num = ny;
1177 tty_write(tty_cmd_deleteline, &ttyctx);
1178 }
1179
1180 /* Clear line at cursor. */
1181 void
1182 screen_write_clearline(struct screen_write_ctx *ctx, u_int bg)
1183 {
1184 struct screen *s = ctx->s;
1185 struct grid_line *gl;
1186 u_int sx = screen_size_x(s);
1187 struct screen_write_citem *ci = ctx->item;
1188
1189 gl = grid_get_line(s->grid, s->grid->hsize + s->cy);
1190 if (gl->cellsize == 0 && COLOUR_DEFAULT(bg))
1191 return;
1192
1193 grid_view_clear(s->grid, 0, s->cy, sx, 1, bg);
1194
1195 screen_write_collect_clear(ctx, s->cy, 1);
1196 ci->x = 0;
1197 ci->used = sx;
1198 ci->type = CLEAR;
1199 ci->bg = bg;
1200 TAILQ_INSERT_TAIL(&ctx->s->write_list[s->cy].items, ci, entry);
1201 ctx->item = screen_write_get_citem();
1202 }
1203
1204 /* Clear to end of line from cursor. */
1205 void
1206 screen_write_clearendofline(struct screen_write_ctx *ctx, u_int bg)
1207 {
1208 struct screen *s = ctx->s;
1209 struct grid_line *gl;
1210 u_int sx = screen_size_x(s);
1211 struct screen_write_citem *ci = ctx->item, *before;
1212
1213 if (s->cx == 0) {
1214 screen_write_clearline(ctx, bg);
1215 return;
1216 }
1217
1218 gl = grid_get_line(s->grid, s->grid->hsize + s->cy);
1219 if (s->cx > sx - 1 || (s->cx >= gl->cellsize && COLOUR_DEFAULT(bg)))
1220 return;
1221
1222 grid_view_clear(s->grid, s->cx, s->cy, sx - s->cx, 1, bg);
1223
1224 before = screen_write_collect_trim(ctx, s->cy, s->cx, sx - s->cx, NULL);
1225 ci->x = s->cx;
1226 ci->used = sx - s->cx;
1227 ci->type = CLEAR;
1228 ci->bg = bg;
1229 if (before == NULL)
1230 TAILQ_INSERT_TAIL(&ctx->s->write_list[s->cy].items, ci, entry);
1231 else
1232 TAILQ_INSERT_BEFORE(before, ci, entry);
1233 ctx->item = screen_write_get_citem();
1234 }
1235
1236 /* Clear to start of line from cursor. */
1237 void
1238 screen_write_clearstartofline(struct screen_write_ctx *ctx, u_int bg)
1239 {
1240 struct screen *s = ctx->s;
1241 u_int sx = screen_size_x(s);
1242 struct screen_write_citem *ci = ctx->item, *before;
1243
1244 if (s->cx >= sx - 1) {
1245 screen_write_clearline(ctx, bg);
1246 return;
1247 }
1248
1249 if (s->cx > sx - 1)
1250 grid_view_clear(s->grid, 0, s->cy, sx, 1, bg);
1251 else
1252 grid_view_clear(s->grid, 0, s->cy, s->cx + 1, 1, bg);
1253
1254 before = screen_write_collect_trim(ctx, s->cy, 0, s->cx + 1, NULL);
1255 ci->x = 0;
1256 ci->used = s->cx + 1;
1257 ci->type = CLEAR;
1258 ci->bg = bg;
1259 if (before == NULL)
1260 TAILQ_INSERT_TAIL(&ctx->s->write_list[s->cy].items, ci, entry);
1261 else
1262 TAILQ_INSERT_BEFORE(before, ci, entry);
1263 ctx->item = screen_write_get_citem();
1264 }
1265
1266 /* Move cursor to px,py. */
1267 void
1268 screen_write_cursormove(struct screen_write_ctx *ctx, int px, int py,
1269 int origin)
1270 {
1271 struct screen *s = ctx->s;
1272
1273 if (origin && py != -1 && (s->mode & MODE_ORIGIN)) {
1274 if ((u_int)py > s->rlower - s->rupper)
1275 py = s->rlower;
1276 else
1277 py += s->rupper;
1278 }
1279
1280 if (px != -1 && (u_int)px > screen_size_x(s) - 1)
1281 px = screen_size_x(s) - 1;
1282 if (py != -1 && (u_int)py > screen_size_y(s) - 1)
1283 py = screen_size_y(s) - 1;
1284
1285 log_debug("%s: from %u,%u to %u,%u", __func__, s->cx, s->cy, px, py);
1286 screen_write_set_cursor(ctx, px, py);
1287 }
1288
1289 /* Reverse index (up with scroll). */
1290 void
1291 screen_write_reverseindex(struct screen_write_ctx *ctx, u_int bg)
1292 {
1293 struct screen *s = ctx->s;
1294 struct tty_ctx ttyctx;
1295
1296 if (s->cy == s->rupper) {
1297 grid_view_scroll_region_down(s->grid, s->rupper, s->rlower, bg);
1298 screen_write_collect_flush(ctx, 0, __func__);
1299
1300 screen_write_initctx(ctx, &ttyctx, 1);
1301 ttyctx.bg = bg;
1302
1303 tty_write(tty_cmd_reverseindex, &ttyctx);
1304 } else if (s->cy > 0)
1305 screen_write_set_cursor(ctx, -1, s->cy - 1);
1306
1307 }
1308
1309 /* Set scroll region. */
1310 void
1311 screen_write_scrollregion(struct screen_write_ctx *ctx, u_int rupper,
1312 u_int rlower)
1313 {
1314 struct screen *s = ctx->s;
1315
1316 if (rupper > screen_size_y(s) - 1)
1317 rupper = screen_size_y(s) - 1;
1318 if (rlower > screen_size_y(s) - 1)
1319 rlower = screen_size_y(s) - 1;
1320 if (rupper >= rlower) /* cannot be one line */
1321 return;
1322
1323 screen_write_collect_flush(ctx, 0, __func__);
1324
1325 /* Cursor moves to top-left. */
1326 screen_write_set_cursor(ctx, 0, 0);
1327
1328 s->rupper = rupper;
1329 s->rlower = rlower;
1330 }
1331
1332 /* Line feed. */
1333 void
1334 screen_write_linefeed(struct screen_write_ctx *ctx, int wrapped, u_int bg)
1335 {
1336 struct screen *s = ctx->s;
1337 struct grid *gd = s->grid;
1338 struct grid_line *gl;
1339
1340 gl = grid_get_line(gd, gd->hsize + s->cy);
1341 if (wrapped)
1342 gl->flags |= GRID_LINE_WRAPPED;
1343
1344 log_debug("%s: at %u,%u (region %u-%u)", __func__, s->cx, s->cy,
1345 s->rupper, s->rlower);
1346
1347 if (bg != ctx->bg) {
1348 screen_write_collect_flush(ctx, 1, __func__);
1349 ctx->bg = bg;
1350 }
1351
1352 if (s->cy == s->rlower) {
1353 grid_view_scroll_region_up(gd, s->rupper, s->rlower, bg);
1354 screen_write_collect_scroll(ctx, bg);
1355 ctx->scrolled++;
1356 } else if (s->cy < screen_size_y(s) - 1)
1357 screen_write_set_cursor(ctx, -1, s->cy + 1);
1358 }
1359
1360 /* Scroll up. */
1361 void
1362 screen_write_scrollup(struct screen_write_ctx *ctx, u_int lines, u_int bg)
1363 {
1364 struct screen *s = ctx->s;
1365 struct grid *gd = s->grid;
1366 u_int i;
1367
1368 if (lines == 0)
1369 lines = 1;
1370 else if (lines > s->rlower - s->rupper + 1)
1371 lines = s->rlower - s->rupper + 1;
1372
1373 if (bg != ctx->bg) {
1374 screen_write_collect_flush(ctx, 1, __func__);
1375 ctx->bg = bg;
1376 }
1377
1378 for (i = 0; i < lines; i++) {
1379 grid_view_scroll_region_up(gd, s->rupper, s->rlower, bg);
1380 screen_write_collect_scroll(ctx, bg);
1381 }
1382 ctx->scrolled += lines;
1383 }
1384
1385 /* Scroll down. */
1386 void
1387 screen_write_scrolldown(struct screen_write_ctx *ctx, u_int lines, u_int bg)
1388 {
1389 struct screen *s = ctx->s;
1390 struct grid *gd = s->grid;
1391 struct tty_ctx ttyctx;
1392 u_int i;
1393
1394 screen_write_initctx(ctx, &ttyctx, 1);
1395 ttyctx.bg = bg;
1396
1397 if (lines == 0)
1398 lines = 1;
1399 else if (lines > s->rlower - s->rupper + 1)
1400 lines = s->rlower - s->rupper + 1;
1401
1402 for (i = 0; i < lines; i++)
1403 grid_view_scroll_region_down(gd, s->rupper, s->rlower, bg);
1404
1405 screen_write_collect_flush(ctx, 0, __func__);
1406 ttyctx.num = lines;
1407 tty_write(tty_cmd_scrolldown, &ttyctx);
1408 }
1409
1410 /* Carriage return (cursor to start of line). */
1411 void
1412 screen_write_carriagereturn(struct screen_write_ctx *ctx)
1413 {
1414 screen_write_set_cursor(ctx, 0, -1);
1415 }
1416
1417 /* Clear to end of screen from cursor. */
1418 void
1419 screen_write_clearendofscreen(struct screen_write_ctx *ctx, u_int bg)
1420 {
1421 struct screen *s = ctx->s;
1422 struct grid *gd = s->grid;
1423 struct tty_ctx ttyctx;
1424 u_int sx = screen_size_x(s), sy = screen_size_y(s);
1425
1426 screen_write_initctx(ctx, &ttyctx, 1);
1427 ttyctx.bg = bg;
1428
1429 /* Scroll into history if it is enabled and clearing entire screen. */
1430 if (s->cx == 0 &&
1431 s->cy == 0 &&
1432 (gd->flags & GRID_HISTORY) &&
1433 ctx->wp != NULL &&
1434 options_get_number(ctx->wp->options, "scroll-on-clear"))
1435 grid_view_clear_history(gd, bg);
1436 else {
1437 if (s->cx <= sx - 1)
1438 grid_view_clear(gd, s->cx, s->cy, sx - s->cx, 1, bg);
1439 grid_view_clear(gd, 0, s->cy + 1, sx, sy - (s->cy + 1), bg);
1440 }
1441
1442 screen_write_collect_clear(ctx, s->cy + 1, sy - (s->cy + 1));
1443 screen_write_collect_flush(ctx, 0, __func__);
1444 tty_write(tty_cmd_clearendofscreen, &ttyctx);
1445 }
1446
1447 /* Clear to start of screen. */
1448 void
1449 screen_write_clearstartofscreen(struct screen_write_ctx *ctx, u_int bg)
1450 {
1451 struct screen *s = ctx->s;
1452 struct tty_ctx ttyctx;
1453 u_int sx = screen_size_x(s);
1454
1455 screen_write_initctx(ctx, &ttyctx, 1);
1456 ttyctx.bg = bg;
1457
1458 if (s->cy > 0)
1459 grid_view_clear(s->grid, 0, 0, sx, s->cy, bg);
1460 if (s->cx > sx - 1)
1461 grid_view_clear(s->grid, 0, s->cy, sx, 1, bg);
1462 else
1463 grid_view_clear(s->grid, 0, s->cy, s->cx + 1, 1, bg);
1464
1465 screen_write_collect_clear(ctx, 0, s->cy);
1466 screen_write_collect_flush(ctx, 0, __func__);
1467 tty_write(tty_cmd_clearstartofscreen, &ttyctx);
1468 }
1469
1470 /* Clear entire screen. */
1471 void
1472 screen_write_clearscreen(struct screen_write_ctx *ctx, u_int bg)
1473 {
1474 struct screen *s = ctx->s;
1475 struct tty_ctx ttyctx;
1476 u_int sx = screen_size_x(s), sy = screen_size_y(s);
1477
1478 screen_write_initctx(ctx, &ttyctx, 1);
1479 ttyctx.bg = bg;
1480
1481 /* Scroll into history if it is enabled. */
1482 if ((s->grid->flags & GRID_HISTORY) &&
1483 ctx->wp != NULL &&
1484 options_get_number(ctx->wp->options, "scroll-on-clear"))
1485 grid_view_clear_history(s->grid, bg);
1486 else
1487 grid_view_clear(s->grid, 0, 0, sx, sy, bg);
1488
1489 screen_write_collect_clear(ctx, 0, sy);
1490 tty_write(tty_cmd_clearscreen, &ttyctx);
1491 }
1492
1493 /* Clear entire history. */
1494 void
1495 screen_write_clearhistory(struct screen_write_ctx *ctx)
1496 {
1497 grid_clear_history(ctx->s->grid);
1498 }
1499
1500 /* Force a full redraw. */
1501 void
1502 screen_write_fullredraw(struct screen_write_ctx *ctx)
1503 {
1504 struct tty_ctx ttyctx;
1505
1506 screen_write_collect_flush(ctx, 0, __func__);
1507
1508 screen_write_initctx(ctx, &ttyctx, 1);
1509 ttyctx.redraw_cb(&ttyctx);
1510 }
1511
1512 /* Trim collected items. */
1513 static struct screen_write_citem *
1514 screen_write_collect_trim(struct screen_write_ctx *ctx, u_int y, u_int x,
1515 u_int used, int *wrapped)
1516 {
1517 struct screen_write_cline *cl = &ctx->s->write_list[y];
1518 struct screen_write_citem *ci, *ci2, *tmp, *before = NULL;
1519 u_int sx = x, ex = x + used - 1;
1520 u_int csx, cex;
1521
1522 if (TAILQ_EMPTY(&cl->items))
1523 return (NULL);
1524 TAILQ_FOREACH_SAFE(ci, &cl->items, entry, tmp) {
1525 csx = ci->x;
1526 cex = ci->x + ci->used - 1;
1527
1528 /* Item is entirely before. */
1529 if (cex < sx) {
1530 log_debug("%s: %p %u-%u before %u-%u", __func__, ci,
1531 csx, cex, sx, ex);
1532 continue;
1533 }
1534
1535 /* Item is entirely after. */
1536 if (csx > ex) {
1537 log_debug("%s: %p %u-%u after %u-%u", __func__, ci,
1538 csx, cex, sx, ex);
1539 before = ci;
1540 break;
1541 }
1542
1543 /* Item is entirely inside. */
1544 if (csx >= sx && cex <= ex) {
1545 log_debug("%s: %p %u-%u inside %u-%u", __func__, ci,
1546 csx, cex, sx, ex);
1547 TAILQ_REMOVE(&cl->items, ci, entry);
1548 screen_write_free_citem(ci);
1549 if (csx == 0 && ci->wrapped && wrapped != NULL)
1550 *wrapped = 1;
1551 continue;
1552 }
1553
1554 /* Item under the start. */
1555 if (csx < sx && cex >= sx && cex <= ex) {
1556 log_debug("%s: %p %u-%u start %u-%u", __func__, ci,
1557 csx, cex, sx, ex);
1558 ci->used = sx - csx;
1559 log_debug("%s: %p now %u-%u", __func__, ci, ci->x,
1560 ci->x + ci->used + 1);
1561 continue;
1562 }
1563
1564 /* Item covers the end. */
1565 if (cex > ex && csx >= sx && csx <= ex) {
1566 log_debug("%s: %p %u-%u end %u-%u", __func__, ci,
1567 csx, cex, sx, ex);
1568 ci->x = ex + 1;
1569 ci->used = cex - ex;
1570 log_debug("%s: %p now %u-%u", __func__, ci, ci->x,
1571 ci->x + ci->used + 1);
1572 before = ci;
1573 break;
1574 }
1575
1576 /* Item must cover both sides. */
1577 log_debug("%s: %p %u-%u under %u-%u", __func__, ci,
1578 csx, cex, sx, ex);
1579 ci2 = screen_write_get_citem();
1580 ci2->type = ci->type;
1581 ci2->bg = ci->bg;
1582 memcpy(&ci2->gc, &ci->gc, sizeof ci2->gc);
1583 TAILQ_INSERT_AFTER(&cl->items, ci, ci2, entry);
1584
1585 ci->used = sx - csx;
1586 ci2->x = ex + 1;
1587 ci2->used = cex - ex;
1588
1589 log_debug("%s: %p now %u-%u (%p) and %u-%u (%p)", __func__, ci,
1590 ci->x, ci->x + ci->used - 1, ci, ci2->x,
1591 ci2->x + ci2->used - 1, ci2);
1592 before = ci2;
1593 break;
1594 }
1595 return (before);
1596 }
1597
1598 /* Clear collected lines. */
1599 static void
1600 screen_write_collect_clear(struct screen_write_ctx *ctx, u_int y, u_int n)
1601 {
1602 struct screen_write_cline *cl;
1603 u_int i;
1604
1605 for (i = y; i < y + n; i++) {
1606 cl = &ctx->s->write_list[i];
1607 TAILQ_CONCAT(&screen_write_citem_freelist, &cl->items, entry);
1608 }
1609 }
1610
1611 /* Scroll collected lines up. */
1612 static void
1613 screen_write_collect_scroll(struct screen_write_ctx *ctx, u_int bg)
1614 {
1615 struct screen *s = ctx->s;
1616 struct screen_write_cline *cl;
1617 u_int y;
1618 char *saved;
1619 struct screen_write_citem *ci;
1620
1621 log_debug("%s: at %u,%u (region %u-%u)", __func__, s->cx, s->cy,
1622 s->rupper, s->rlower);
1623
1624 screen_write_collect_clear(ctx, s->rupper, 1);
1625 saved = ctx->s->write_list[s->rupper].data;
1626 for (y = s->rupper; y < s->rlower; y++) {
1627 cl = &ctx->s->write_list[y + 1];
1628 TAILQ_CONCAT(&ctx->s->write_list[y].items, &cl->items, entry);
1629 ctx->s->write_list[y].data = cl->data;
1630 }
1631 ctx->s->write_list[s->rlower].data = saved;
1632
1633 ci = screen_write_get_citem();
1634 ci->x = 0;
1635 ci->used = screen_size_x(s);
1636 ci->type = CLEAR;
1637 ci->bg = bg;
1638 TAILQ_INSERT_TAIL(&ctx->s->write_list[s->rlower].items, ci, entry);
1639 }
1640
1641 /* Flush collected lines. */
1642 static void
1643 screen_write_collect_flush(struct screen_write_ctx *ctx, int scroll_only,
1644 const char *from)
1645 {
1646 struct screen *s = ctx->s;
1647 struct screen_write_citem *ci, *tmp;
1648 struct screen_write_cline *cl;
1649 u_int y, cx, cy, last, items = 0;
1650 struct tty_ctx ttyctx;
1651
1652 if (ctx->scrolled != 0) {
1653 log_debug("%s: scrolled %u (region %u-%u)", __func__,
1654 ctx->scrolled, s->rupper, s->rlower);
1655 if (ctx->scrolled > s->rlower - s->rupper + 1)
1656 ctx->scrolled = s->rlower - s->rupper + 1;
1657
1658 screen_write_initctx(ctx, &ttyctx, 1);
1659 ttyctx.num = ctx->scrolled;
1660 ttyctx.bg = ctx->bg;
1661 tty_write(tty_cmd_scrollup, &ttyctx);
1662 }
1663 ctx->scrolled = 0;
1664 ctx->bg = 8;
1665
1666 if (scroll_only)
1667 return;
1668
1669 cx = s->cx; cy = s->cy;
1670 for (y = 0; y < screen_size_y(s); y++) {
1671 cl = &ctx->s->write_list[y];
1672 last = UINT_MAX;
1673 TAILQ_FOREACH_SAFE(ci, &cl->items, entry, tmp) {
1674 if (last != UINT_MAX && ci->x <= last) {
1675 fatalx("collect list not in order: %u <= %u",
1676 ci->x, last);
1677 }
1678 screen_write_set_cursor(ctx, ci->x, y);
1679 if (ci->type == CLEAR) {
1680 screen_write_initctx(ctx, &ttyctx, 1);
1681 ttyctx.bg = ci->bg;
1682 ttyctx.num = ci->used;
1683 tty_write(tty_cmd_clearcharacter, &ttyctx);
1684 } else {
1685 screen_write_initctx(ctx, &ttyctx, 0);
1686 ttyctx.cell = &ci->gc;
1687 ttyctx.wrapped = ci->wrapped;
1688 ttyctx.ptr = cl->data + ci->x;
1689 ttyctx.num = ci->used;
1690 tty_write(tty_cmd_cells, &ttyctx);
1691 }
1692 items++;
1693
1694 TAILQ_REMOVE(&cl->items, ci, entry);
1695 screen_write_free_citem(ci);
1696 last = ci->x;
1697 }
1698 }
1699 s->cx = cx; s->cy = cy;
1700
1701 log_debug("%s: flushed %u items (%s)", __func__, items, from);
1702 }
1703
1704 /* Finish and store collected cells. */
1705 void
1706 screen_write_collect_end(struct screen_write_ctx *ctx)
1707 {
1708 struct screen *s = ctx->s;
1709 struct screen_write_citem *ci = ctx->item, *before;
1710 struct screen_write_cline *cl = &s->write_list[s->cy];
1711 struct grid_cell gc;
1712 u_int xx;
1713 int wrapped = ci->wrapped;
1714
1715 if (ci->used == 0)
1716 return;
1717
1718 before = screen_write_collect_trim(ctx, s->cy, s->cx, ci->used,
1719 &wrapped);
1720 ci->x = s->cx;
1721 ci->wrapped = wrapped;
1722 if (before == NULL)
1723 TAILQ_INSERT_TAIL(&cl->items, ci, entry);
1724 else
1725 TAILQ_INSERT_BEFORE(before, ci, entry);
1726 ctx->item = screen_write_get_citem();
1727
1728 log_debug("%s: %u %.*s (at %u,%u)", __func__, ci->used,
1729 (int)ci->used, cl->data + ci->x, s->cx, s->cy);
1730
1731 if (s->cx != 0) {
1732 for (xx = s->cx; xx > 0; xx--) {
1733 grid_view_get_cell(s->grid, xx, s->cy, &gc);
1734 if (~gc.flags & GRID_FLAG_PADDING)
1735 break;
1736 grid_view_set_cell(s->grid, xx, s->cy,
1737 &grid_default_cell);
1738 }
1739 if (gc.data.width > 1) {
1740 grid_view_set_cell(s->grid, xx, s->cy,
1741 &grid_default_cell);
1742 }
1743 }
1744
1745 grid_view_set_cells(s->grid, s->cx, s->cy, &ci->gc, cl->data + ci->x,
1746 ci->used);
1747 screen_write_set_cursor(ctx, s->cx + ci->used, -1);
1748
1749 for (xx = s->cx; xx < screen_size_x(s); xx++) {
1750 grid_view_get_cell(s->grid, xx, s->cy, &gc);
1751 if (~gc.flags & GRID_FLAG_PADDING)
1752 break;
1753 grid_view_set_cell(s->grid, xx, s->cy, &grid_default_cell);
1754 }
1755 }
1756
1757 /* Write cell data, collecting if necessary. */
1758 void
1759 screen_write_collect_add(struct screen_write_ctx *ctx,
1760 const struct grid_cell *gc)
1761 {
1762 struct screen *s = ctx->s;
1763 struct screen_write_citem *ci;
1764 u_int sx = screen_size_x(s);
1765 int collect;
1766
1767 /*
1768 * Don't need to check that the attributes and whatnot are still the
1769 * same - input_parse will end the collection when anything that isn't
1770 * a plain character is encountered.
1771 */
1772
1773 collect = 1;
1774 if (gc->data.width != 1 || gc->data.size != 1 || *gc->data.data >= 0x7f)
1775 collect = 0;
1776 else if (gc->attr & GRID_ATTR_CHARSET)
1777 collect = 0;
1778 else if (~s->mode & MODE_WRAP)
1779 collect = 0;
1780 else if (s->mode & MODE_INSERT)
1781 collect = 0;
1782 else if (s->sel != NULL)
1783 collect = 0;
1784 if (!collect) {
1785 screen_write_collect_end(ctx);
1786 screen_write_collect_flush(ctx, 0, __func__);
1787 screen_write_cell(ctx, gc);
1788 return;
1789 }
1790
1791 if (s->cx > sx - 1 || ctx->item->used > sx - 1 - s->cx)
1792 screen_write_collect_end(ctx);
1793 ci = ctx->item; /* may have changed */
1794
1795 if (s->cx > sx - 1) {
1796 log_debug("%s: wrapped at %u,%u", __func__, s->cx, s->cy);
1797 ci->wrapped = 1;
1798 screen_write_linefeed(ctx, 1, 8);
1799 screen_write_set_cursor(ctx, 0, -1);
1800 }
1801
1802 if (ci->used == 0)
1803 memcpy(&ci->gc, gc, sizeof ci->gc);
1804 if (ctx->s->write_list[s->cy].data == NULL)
1805 ctx->s->write_list[s->cy].data = xmalloc(screen_size_x(ctx->s));
1806 ctx->s->write_list[s->cy].data[s->cx + ci->used++] = gc->data.data[0];
1807 }
1808
1809 /* Write cell data. */
1810 void
1811 screen_write_cell(struct screen_write_ctx *ctx, const struct grid_cell *gc)
1812 {
1813 struct screen *s = ctx->s;
1814 struct grid *gd = s->grid;
1815 const struct utf8_data *ud = &gc->data;
1816 const struct utf8_data zwj = { "\342\200\215", 0, 3, 0 };
1817 struct grid_line *gl;
1818 struct grid_cell_entry *gce;
1819 struct grid_cell tmp_gc, now_gc;
1820 struct tty_ctx ttyctx;
1821 u_int sx = screen_size_x(s), sy = screen_size_y(s);
1822 u_int width = gc->data.width, xx, last, cx, cy;
1823 int selected, skip = 1;
1824
1825 /* Ignore padding cells. */
1826 if (gc->flags & GRID_FLAG_PADDING)
1827 return;
1828
1829 /*
1830 * If this is a zero width joiner, set the flag so the next character
1831 * will be treated as zero width and appended. Note that we assume a
1832 * ZWJ will not change the width - the width of the first character is
1833 * used.
1834 */
1835 if (ud->size == 3 && memcmp(ud->data, "\342\200\215", 3) == 0) {
1836 log_debug("zero width joiner at %u,%u", s->cx, s->cy);
1837 ctx->flags |= SCREEN_WRITE_ZWJ;
1838 return;
1839 }
1840
1841 /*
1842 * If the width is zero, combine onto the previous character. We always
1843 * combine with the cell to the left of the cursor position. In theory,
1844 * the application could have moved the cursor somewhere else, but if
1845 * they are silly enough to do that, who cares?
1846 */
1847 if (ctx->flags & SCREEN_WRITE_ZWJ) {
1848 screen_write_collect_flush(ctx, 0, __func__);
1849 screen_write_combine(ctx, &zwj, &xx);
1850 }
1851 if (width == 0 || (ctx->flags & SCREEN_WRITE_ZWJ)) {
1852 ctx->flags &= ~SCREEN_WRITE_ZWJ;
1853 screen_write_collect_flush(ctx, 0, __func__);
1854 if ((gc = screen_write_combine(ctx, ud, &xx)) != NULL) {
1855 cx = s->cx; cy = s->cy;
1856 screen_write_set_cursor(ctx, xx, s->cy);
1857 screen_write_initctx(ctx, &ttyctx, 0);
1858 ttyctx.cell = gc;
1859 tty_write(tty_cmd_cell, &ttyctx);
1860 s->cx = cx; s->cy = cy;
1861 }
1862 return;
1863 }
1864
1865 /* Flush any existing scrolling. */
1866 screen_write_collect_flush(ctx, 1, __func__);
1867
1868 /* If this character doesn't fit, ignore it. */
1869 if ((~s->mode & MODE_WRAP) &&
1870 width > 1 &&
1871 (width > sx || (s->cx != sx && s->cx > sx - width)))
1872 return;
1873
1874 /* If in insert mode, make space for the cells. */
1875 if (s->mode & MODE_INSERT) {
1876 grid_view_insert_cells(s->grid, s->cx, s->cy, width, 8);
1877 skip = 0;
1878 }
1879
1880 /* Check this will fit on the current line and wrap if not. */
1881 if ((s->mode & MODE_WRAP) && s->cx > sx - width) {
1882 log_debug("%s: wrapped at %u,%u", __func__, s->cx, s->cy);
1883 screen_write_linefeed(ctx, 1, 8);
1884 screen_write_set_cursor(ctx, 0, -1);
1885 screen_write_collect_flush(ctx, 1, __func__);
1886 }
1887
1888 /* Sanity check cursor position. */
1889 if (s->cx > sx - width || s->cy > sy - 1)
1890 return;
1891 screen_write_initctx(ctx, &ttyctx, 0);
1892
1893 /* Handle overwriting of UTF-8 characters. */
1894 gl = grid_get_line(s->grid, s->grid->hsize + s->cy);
1895 if (gl->flags & GRID_LINE_EXTENDED) {
1896 grid_view_get_cell(gd, s->cx, s->cy, &now_gc);
1897 if (screen_write_overwrite(ctx, &now_gc, width))
1898 skip = 0;
1899 }
1900
1901 /*
1902 * If the new character is UTF-8 wide, fill in padding cells. Have
1903 * already ensured there is enough room.
1904 */
1905 for (xx = s->cx + 1; xx < s->cx + width; xx++) {
1906 log_debug("%s: new padding at %u,%u", __func__, xx, s->cy);
1907 grid_view_set_padding(gd, xx, s->cy);
1908 skip = 0;
1909 }
1910
1911 /* If no change, do not draw. */
1912 if (skip) {
1913 if (s->cx >= gl->cellsize)
1914 skip = grid_cells_equal(gc, &grid_default_cell);
1915 else {
1916 gce = &gl->celldata[s->cx];
1917 if (gce->flags & GRID_FLAG_EXTENDED)
1918 skip = 0;
1919 else if (gc->flags != gce->flags)
1920 skip = 0;
1921 else if (gc->attr != gce->data.attr)
1922 skip = 0;
1923 else if (gc->fg != gce->data.fg)
1924 skip = 0;
1925 else if (gc->bg != gce->data.bg)
1926 skip = 0;
1927 else if (gc->data.width != 1)
1928 skip = 0;
1929 else if (gc->data.size != 1)
1930 skip = 0;
1931 else if (gce->data.data != gc->data.data[0])
1932 skip = 0;
1933 }
1934 }
1935
1936 /* Update the selected flag and set the cell. */
1937 selected = screen_check_selection(s, s->cx, s->cy);
1938 if (selected && (~gc->flags & GRID_FLAG_SELECTED)) {
1939 memcpy(&tmp_gc, gc, sizeof tmp_gc);
1940 tmp_gc.flags |= GRID_FLAG_SELECTED;
1941 grid_view_set_cell(gd, s->cx, s->cy, &tmp_gc);
1942 } else if (!selected && (gc->flags & GRID_FLAG_SELECTED)) {
1943 memcpy(&tmp_gc, gc, sizeof tmp_gc);
1944 tmp_gc.flags &= ~GRID_FLAG_SELECTED;
1945 grid_view_set_cell(gd, s->cx, s->cy, &tmp_gc);
1946 } else if (!skip)
1947 grid_view_set_cell(gd, s->cx, s->cy, gc);
1948 if (selected)
1949 skip = 0;
1950
1951 /*
1952 * Move the cursor. If not wrapping, stick at the last character and
1953 * replace it.
1954 */
1955 last = !(s->mode & MODE_WRAP);
1956 if (s->cx <= sx - last - width)
1957 screen_write_set_cursor(ctx, s->cx + width, -1);
1958 else
1959 screen_write_set_cursor(ctx, sx - last, -1);
1960
1961 /* Create space for character in insert mode. */
1962 if (s->mode & MODE_INSERT) {
1963 screen_write_collect_flush(ctx, 0, __func__);
1964 ttyctx.num = width;
1965 tty_write(tty_cmd_insertcharacter, &ttyctx);
1966 }
1967
1968 /* Write to the screen. */
1969 if (!skip) {
1970 if (selected) {
1971 screen_select_cell(s, &tmp_gc, gc);
1972 ttyctx.cell = &tmp_gc;
1973 } else
1974 ttyctx.cell = gc;
1975 tty_write(tty_cmd_cell, &ttyctx);
1976 }
1977 }
1978
1979 /* Combine a UTF-8 zero-width character onto the previous. */
1980 static const struct grid_cell *
1981 screen_write_combine(struct screen_write_ctx *ctx, const struct utf8_data *ud,
1982 u_int *xx)
1983 {
1984 struct screen *s = ctx->s;
1985 struct grid *gd = s->grid;
1986 static struct grid_cell gc;
1987 u_int n;
1988
1989 /* Can't combine if at 0. */
1990 if (s->cx == 0)
1991 return (NULL);
1992
1993 /* Empty data is out. */
1994 if (ud->size == 0)
1995 fatalx("UTF-8 data empty");
1996
1997 /* Retrieve the previous cell. */
1998 for (n = 1; n <= s->cx; n++) {
1999 grid_view_get_cell(gd, s->cx - n, s->cy, &gc);
2000 if (~gc.flags & GRID_FLAG_PADDING)
2001 break;
2002 }
2003 if (n > s->cx)
2004 return (NULL);
2005 *xx = s->cx - n;
2006
2007 /* Check there is enough space. */
2008 if (gc.data.size + ud->size > sizeof gc.data.data)
2009 return (NULL);
2010
2011 log_debug("%s: %.*s onto %.*s at %u,%u", __func__, (int)ud->size,
2012 ud->data, (int)gc.data.size, gc.data.data, *xx, s->cy);
2013
2014 /* Append the data. */
2015 memcpy(gc.data.data + gc.data.size, ud->data, ud->size);
2016 gc.data.size += ud->size;
2017
2018 /* Set the new cell. */
2019 grid_view_set_cell(gd, *xx, s->cy, &gc);
2020
2021 return (&gc);
2022 }
2023
2024 /*
2025 * UTF-8 wide characters are a bit of an annoyance. They take up more than one
2026 * cell on the screen, so following cells must not be drawn by marking them as
2027 * padding.
2028 *
2029 * So far, so good. The problem is, when overwriting a padding cell, or a UTF-8
2030 * character, it is necessary to also overwrite any other cells which covered
2031 * by the same character.
2032 */
2033 static int
2034 screen_write_overwrite(struct screen_write_ctx *ctx, struct grid_cell *gc,
2035 u_int width)
2036 {
2037 struct screen *s = ctx->s;
2038 struct grid *gd = s->grid;
2039 struct grid_cell tmp_gc;
2040 u_int xx;
2041 int done = 0;
2042
2043 if (gc->flags & GRID_FLAG_PADDING) {
2044 /*
2045 * A padding cell, so clear any following and leading padding
2046 * cells back to the character. Don't overwrite the current
2047 * cell as that happens later anyway.
2048 */
2049 xx = s->cx + 1;
2050 while (--xx > 0) {
2051 grid_view_get_cell(gd, xx, s->cy, &tmp_gc);
2052 if (~tmp_gc.flags & GRID_FLAG_PADDING)
2053 break;
2054 log_debug("%s: padding at %u,%u", __func__, xx, s->cy);
2055 grid_view_set_cell(gd, xx, s->cy, &grid_default_cell);
2056 }
2057
2058 /* Overwrite the character at the start of this padding. */
2059 log_debug("%s: character at %u,%u", __func__, xx, s->cy);
2060 grid_view_set_cell(gd, xx, s->cy, &grid_default_cell);
2061 done = 1;
2062 }
2063
2064 /*
2065 * Overwrite any padding cells that belong to any UTF-8 characters
2066 * we'll be overwriting with the current character.
2067 */
2068 if (width != 1 ||
2069 gc->data.width != 1 ||
2070 gc->flags & GRID_FLAG_PADDING) {
2071 xx = s->cx + width - 1;
2072 while (++xx < screen_size_x(s)) {
2073 grid_view_get_cell(gd, xx, s->cy, &tmp_gc);
2074 if (~tmp_gc.flags & GRID_FLAG_PADDING)
2075 break;
2076 log_debug("%s: overwrite at %u,%u", __func__, xx,
2077 s->cy);
2078 grid_view_set_cell(gd, xx, s->cy, &grid_default_cell);
2079 done = 1;
2080 }
2081 }
2082
2083 return (done);
2084 }
2085
2086 /* Set external clipboard. */
2087 void
2088 screen_write_setselection(struct screen_write_ctx *ctx, u_char *str, u_int len)
2089 {
2090 struct tty_ctx ttyctx;
2091
2092 screen_write_initctx(ctx, &ttyctx, 0);
2093 ttyctx.ptr = str;
2094 ttyctx.num = len;
2095
2096 tty_write(tty_cmd_setselection, &ttyctx);
2097 }
2098
2099 /* Write unmodified string. */
2100 void
2101 screen_write_rawstring(struct screen_write_ctx *ctx, u_char *str, u_int len)
2102 {
2103 struct tty_ctx ttyctx;
2104
2105 screen_write_initctx(ctx, &ttyctx, 0);
2106 ttyctx.ptr = str;
2107 ttyctx.num = len;
2108
2109 tty_write(tty_cmd_rawstring, &ttyctx);
2110 }
2111
2112 /* Turn alternate screen on. */
2113 void
2114 screen_write_alternateon(struct screen_write_ctx *ctx, struct grid_cell *gc,
2115 int cursor)
2116 {
2117 struct tty_ctx ttyctx;
2118 struct window_pane *wp = ctx->wp;
2119
2120 if (wp != NULL && !options_get_number(wp->options, "alternate-screen"))
2121 return;
2122
2123 screen_write_collect_flush(ctx, 0, __func__);
2124 screen_alternate_on(ctx->s, gc, cursor);
2125
2126 screen_write_initctx(ctx, &ttyctx, 1);
2127 ttyctx.redraw_cb(&ttyctx);
2128 }
2129
2130 /* Turn alternate screen off. */
2131 void
2132 screen_write_alternateoff(struct screen_write_ctx *ctx, struct grid_cell *gc,
2133 int cursor)
2134 {
2135 struct tty_ctx ttyctx;
2136 struct window_pane *wp = ctx->wp;
2137
2138 if (wp != NULL && !options_get_number(wp->options, "alternate-screen"))
2139 return;
2140
2141 screen_write_collect_flush(ctx, 0, __func__);
2142 screen_alternate_off(ctx->s, gc, cursor);
2143
2144 screen_write_initctx(ctx, &ttyctx, 1);
2145 ttyctx.redraw_cb(&ttyctx);
2146 }