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Merge branch 'obsd-master'
[tmux.git] / screen-write.c
blob7fca3c74e035501b78339f8c7c42556394894e59
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;
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 > 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 > 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 grid *gd = src->grid;
571 struct grid_cell gc;
572 u_int xx, yy, cx, cy;
573
574 if (nx == 0 || ny == 0)
575 return;
576
577 cy = s->cy;
578 for (yy = py; yy < py + ny; yy++) {
579 if (yy >= gd->hsize + gd->sy)
580 break;
581 cx = s->cx;
582 for (xx = px; xx < px + nx; xx++) {
583 if (xx >= grid_get_line(gd, yy)->cellsize)
584 break;
585 grid_get_cell(gd, xx, yy, &gc);
586 if (xx + gc.data.width > px + nx)
587 break;
588 grid_view_set_cell(ctx->s->grid, cx, cy, &gc);
589 cx++;
590 }
591 cy++;
592 }
593 }
594
595 /* Select character set for drawing border lines. */
596 static void
597 screen_write_box_border_set(enum box_lines lines, int cell_type,
598 struct grid_cell *gc)
599 {
600 switch (lines) {
601 case BOX_LINES_NONE:
602 break;
603 case BOX_LINES_DOUBLE:
604 gc->attr &= ~GRID_ATTR_CHARSET;
605 utf8_copy(&gc->data, tty_acs_double_borders(cell_type));
606 break;
607 case BOX_LINES_HEAVY:
608 gc->attr &= ~GRID_ATTR_CHARSET;
609 utf8_copy(&gc->data, tty_acs_heavy_borders(cell_type));
610 break;
611 case BOX_LINES_ROUNDED:
612 gc->attr &= ~GRID_ATTR_CHARSET;
613 utf8_copy(&gc->data, tty_acs_rounded_borders(cell_type));
614 break;
615 case BOX_LINES_SIMPLE:
616 gc->attr &= ~GRID_ATTR_CHARSET;
617 utf8_set(&gc->data, SIMPLE_BORDERS[cell_type]);
618 break;
619 case BOX_LINES_PADDED:
620 gc->attr &= ~GRID_ATTR_CHARSET;
621 utf8_set(&gc->data, PADDED_BORDERS[cell_type]);
622 break;
623 case BOX_LINES_SINGLE:
624 case BOX_LINES_DEFAULT:
625 gc->attr |= GRID_ATTR_CHARSET;
626 utf8_set(&gc->data, CELL_BORDERS[cell_type]);
627 break;
628 }
629 }
630
631 /* Draw a horizontal line on screen. */
632 void
633 screen_write_hline(struct screen_write_ctx *ctx, u_int nx, int left, int right,
634 enum box_lines lines, const struct grid_cell *border_gc)
635 {
636 struct screen *s = ctx->s;
637 struct grid_cell gc;
638 u_int cx, cy, i;
639
640 cx = s->cx;
641 cy = s->cy;
642
643 if (border_gc != NULL)
644 memcpy(&gc, border_gc, sizeof gc);
645 else
646 memcpy(&gc, &grid_default_cell, sizeof gc);
647 gc.attr |= GRID_ATTR_CHARSET;
648
649 if (left)
650 screen_write_box_border_set(lines, CELL_LEFTJOIN, &gc);
651 else
652 screen_write_box_border_set(lines, CELL_LEFTRIGHT, &gc);
653 screen_write_cell(ctx, &gc);
654
655 screen_write_box_border_set(lines, CELL_LEFTRIGHT, &gc);
656 for (i = 1; i < nx - 1; i++)
657 screen_write_cell(ctx, &gc);
658
659 if (right)
660 screen_write_box_border_set(lines, CELL_RIGHTJOIN, &gc);
661 else
662 screen_write_box_border_set(lines, CELL_LEFTRIGHT, &gc);
663 screen_write_cell(ctx, &gc);
664
665 screen_write_set_cursor(ctx, cx, cy);
666 }
667
668 /* Draw a vertical line on screen. */
669 void
670 screen_write_vline(struct screen_write_ctx *ctx, u_int ny, int top, int bottom)
671 {
672 struct screen *s = ctx->s;
673 struct grid_cell gc;
674 u_int cx, cy, i;
675
676 cx = s->cx;
677 cy = s->cy;
678
679 memcpy(&gc, &grid_default_cell, sizeof gc);
680 gc.attr |= GRID_ATTR_CHARSET;
681
682 screen_write_putc(ctx, &gc, top ? 'w' : 'x');
683 for (i = 1; i < ny - 1; i++) {
684 screen_write_set_cursor(ctx, cx, cy + i);
685 screen_write_putc(ctx, &gc, 'x');
686 }
687 screen_write_set_cursor(ctx, cx, cy + ny - 1);
688 screen_write_putc(ctx, &gc, bottom ? 'v' : 'x');
689
690 screen_write_set_cursor(ctx, cx, cy);
691 }
692
693 /* Draw a menu on screen. */
694 void
695 screen_write_menu(struct screen_write_ctx *ctx, struct menu *menu, int choice,
696 enum box_lines lines, const struct grid_cell *menu_gc,
697 const struct grid_cell *border_gc, const struct grid_cell *choice_gc)
698 {
699 struct screen *s = ctx->s;
700 struct grid_cell default_gc;
701 const struct grid_cell *gc = &default_gc;
702 u_int cx, cy, i, j, width = menu->width;
703 const char *name;
704
705 cx = s->cx;
706 cy = s->cy;
707
708 memcpy(&default_gc, menu_gc, sizeof default_gc);
709
710 screen_write_box(ctx, menu->width + 4, menu->count + 2, lines,
711 border_gc, menu->title);
712
713 for (i = 0; i < menu->count; i++) {
714 name = menu->items[i].name;
715 if (name == NULL) {
716 screen_write_cursormove(ctx, cx, cy + 1 + i, 0);
717 screen_write_hline(ctx, width + 4, 1, 1, lines,
718 border_gc);
719 continue;
720 }
721
722 if (choice >= 0 && i == (u_int)choice && *name != '-')
723 gc = choice_gc;
724
725 screen_write_cursormove(ctx, cx + 1, cy + 1 + i, 0);
726 for (j = 0; j < width + 2; j++)
727 screen_write_putc(ctx, gc, ' ');
728
729 screen_write_cursormove(ctx, cx + 2, cy + 1 + i, 0);
730 if (*name == '-') {
731 default_gc.attr |= GRID_ATTR_DIM;
732 format_draw(ctx, gc, width, name + 1, NULL, 0);
733 default_gc.attr &= ~GRID_ATTR_DIM;
734 continue;
735 }
736
737 format_draw(ctx, gc, width, name, NULL, 0);
738 gc = &default_gc;
739 }
740
741 screen_write_set_cursor(ctx, cx, cy);
742 }
743
744 /* Draw a box on screen. */
745 void
746 screen_write_box(struct screen_write_ctx *ctx, u_int nx, u_int ny,
747 enum box_lines lines, const struct grid_cell *gcp, const char *title)
748 {
749 struct screen *s = ctx->s;
750 struct grid_cell gc;
751 u_int cx, cy, i;
752
753 cx = s->cx;
754 cy = s->cy;
755
756 if (gcp != NULL)
757 memcpy(&gc, gcp, sizeof gc);
758 else
759 memcpy(&gc, &grid_default_cell, sizeof gc);
760
761 gc.attr |= GRID_ATTR_CHARSET;
762 gc.flags |= GRID_FLAG_NOPALETTE;
763
764 /* Draw top border */
765 screen_write_box_border_set(lines, CELL_TOPLEFT, &gc);
766 screen_write_cell(ctx, &gc);
767 screen_write_box_border_set(lines, CELL_LEFTRIGHT, &gc);
768 for (i = 1; i < nx - 1; i++)
769 screen_write_cell(ctx, &gc);
770 screen_write_box_border_set(lines, CELL_TOPRIGHT, &gc);
771 screen_write_cell(ctx, &gc);
772
773 /* Draw bottom border */
774 screen_write_set_cursor(ctx, cx, cy + ny - 1);
775 screen_write_box_border_set(lines, CELL_BOTTOMLEFT, &gc);
776 screen_write_cell(ctx, &gc);
777 screen_write_box_border_set(lines, CELL_LEFTRIGHT, &gc);
778 for (i = 1; i < nx - 1; i++)
779 screen_write_cell(ctx, &gc);
780 screen_write_box_border_set(lines, CELL_BOTTOMRIGHT, &gc);
781 screen_write_cell(ctx, &gc);
782
783 /* Draw sides */
784 screen_write_box_border_set(lines, CELL_TOPBOTTOM, &gc);
785 for (i = 1; i < ny - 1; i++) {
786 /* left side */
787 screen_write_set_cursor(ctx, cx, cy + i);
788 screen_write_cell(ctx, &gc);
789 /* right side */
790 screen_write_set_cursor(ctx, cx + nx - 1, cy + i);
791 screen_write_cell(ctx, &gc);
792 }
793
794 if (title != NULL) {
795 gc.attr &= ~GRID_ATTR_CHARSET;
796 screen_write_cursormove(ctx, cx + 2, cy, 0);
797 format_draw(ctx, &gc, nx - 4, title, NULL, 0);
798 }
799
800 screen_write_set_cursor(ctx, cx, cy);
801 }
802
803 /*
804 * Write a preview version of a window. Assumes target area is big enough and
805 * already cleared.
806 */
807 void
808 screen_write_preview(struct screen_write_ctx *ctx, struct screen *src, u_int nx,
809 u_int ny)
810 {
811 struct screen *s = ctx->s;
812 struct grid_cell gc;
813 u_int cx, cy, px, py;
814
815 cx = s->cx;
816 cy = s->cy;
817
818 /*
819 * If the cursor is on, pick the area around the cursor, otherwise use
820 * the top left.
821 */
822 if (src->mode & MODE_CURSOR) {
823 px = src->cx;
824 if (px < nx / 3)
825 px = 0;
826 else
827 px = px - nx / 3;
828 if (px + nx > screen_size_x(src)) {
829 if (nx > screen_size_x(src))
830 px = 0;
831 else
832 px = screen_size_x(src) - nx;
833 }
834 py = src->cy;
835 if (py < ny / 3)
836 py = 0;
837 else
838 py = py - ny / 3;
839 if (py + ny > screen_size_y(src)) {
840 if (ny > screen_size_y(src))
841 py = 0;
842 else
843 py = screen_size_y(src) - ny;
844 }
845 } else {
846 px = 0;
847 py = 0;
848 }
849
850 screen_write_fast_copy(ctx, src, px, src->grid->hsize + py, nx, ny);
851
852 if (src->mode & MODE_CURSOR) {
853 grid_view_get_cell(src->grid, src->cx, src->cy, &gc);
854 gc.attr |= GRID_ATTR_REVERSE;
855 screen_write_set_cursor(ctx, cx + (src->cx - px),
856 cy + (src->cy - py));
857 screen_write_cell(ctx, &gc);
858 }
859 }
860
861 /* Set a mode. */
862 void
863 screen_write_mode_set(struct screen_write_ctx *ctx, int mode)
864 {
865 struct screen *s = ctx->s;
866
867 s->mode |= mode;
868
869 if (log_get_level() != 0)
870 log_debug("%s: %s", __func__, screen_mode_to_string(mode));
871 }
872
873 /* Clear a mode. */
874 void
875 screen_write_mode_clear(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 /* Cursor up by ny. */
886 void
887 screen_write_cursorup(struct screen_write_ctx *ctx, u_int ny)
888 {
889 struct screen *s = ctx->s;
890 u_int cx = s->cx, cy = s->cy;
891
892 if (ny == 0)
893 ny = 1;
894
895 if (cy < s->rupper) {
896 /* Above region. */
897 if (ny > cy)
898 ny = cy;
899 } else {
900 /* Below region. */
901 if (ny > cy - s->rupper)
902 ny = cy - s->rupper;
903 }
904 if (cx == screen_size_x(s))
905 cx--;
906
907 cy -= ny;
908
909 screen_write_set_cursor(ctx, cx, cy);
910 }
911
912 /* Cursor down by ny. */
913 void
914 screen_write_cursordown(struct screen_write_ctx *ctx, u_int ny)
915 {
916 struct screen *s = ctx->s;
917 u_int cx = s->cx, cy = s->cy;
918
919 if (ny == 0)
920 ny = 1;
921
922 if (cy > s->rlower) {
923 /* Below region. */
924 if (ny > screen_size_y(s) - 1 - cy)
925 ny = screen_size_y(s) - 1 - cy;
926 } else {
927 /* Above region. */
928 if (ny > s->rlower - cy)
929 ny = s->rlower - cy;
930 }
931 if (cx == screen_size_x(s))
932 cx--;
933 else if (ny == 0)
934 return;
935
936 cy += ny;
937
938 screen_write_set_cursor(ctx, cx, cy);
939 }
940
941 /* Cursor right by nx. */
942 void
943 screen_write_cursorright(struct screen_write_ctx *ctx, u_int nx)
944 {
945 struct screen *s = ctx->s;
946 u_int cx = s->cx, cy = s->cy;
947
948 if (nx == 0)
949 nx = 1;
950
951 if (nx > screen_size_x(s) - 1 - cx)
952 nx = screen_size_x(s) - 1 - cx;
953 if (nx == 0)
954 return;
955
956 cx += nx;
957
958 screen_write_set_cursor(ctx, cx, cy);
959 }
960
961 /* Cursor left by nx. */
962 void
963 screen_write_cursorleft(struct screen_write_ctx *ctx, u_int nx)
964 {
965 struct screen *s = ctx->s;
966 u_int cx = s->cx, cy = s->cy;
967
968 if (nx == 0)
969 nx = 1;
970
971 if (nx > cx)
972 nx = cx;
973 if (nx == 0)
974 return;
975
976 cx -= nx;
977
978 screen_write_set_cursor(ctx, cx, cy);
979 }
980
981 /* Backspace; cursor left unless at start of wrapped line when can move up. */
982 void
983 screen_write_backspace(struct screen_write_ctx *ctx)
984 {
985 struct screen *s = ctx->s;
986 struct grid_line *gl;
987 u_int cx = s->cx, cy = s->cy;
988
989 if (cx == 0) {
990 if (cy == 0)
991 return;
992 gl = grid_get_line(s->grid, s->grid->hsize + cy - 1);
993 if (gl->flags & GRID_LINE_WRAPPED) {
994 cy--;
995 cx = screen_size_x(s) - 1;
996 }
997 } else
998 cx--;
999
1000 screen_write_set_cursor(ctx, cx, cy);
1001 }
1002
1003 /* VT100 alignment test. */
1004 void
1005 screen_write_alignmenttest(struct screen_write_ctx *ctx)
1006 {
1007 struct screen *s = ctx->s;
1008 struct tty_ctx ttyctx;
1009 struct grid_cell gc;
1010 u_int xx, yy;
1011
1012 memcpy(&gc, &grid_default_cell, sizeof gc);
1013 utf8_set(&gc.data, 'E');
1014
1015 #ifdef ENABLE_SIXEL
1016 if (image_free_all(s) && ctx->wp != NULL)
1017 ctx->wp->flags |= PANE_REDRAW;
1018 #endif
1019
1020 for (yy = 0; yy < screen_size_y(s); yy++) {
1021 for (xx = 0; xx < screen_size_x(s); xx++)
1022 grid_view_set_cell(s->grid, xx, yy, &gc);
1023 }
1024
1025 screen_write_set_cursor(ctx, 0, 0);
1026
1027 s->rupper = 0;
1028 s->rlower = screen_size_y(s) - 1;
1029
1030 screen_write_initctx(ctx, &ttyctx, 1);
1031
1032 screen_write_collect_clear(ctx, 0, screen_size_y(s) - 1);
1033 tty_write(tty_cmd_alignmenttest, &ttyctx);
1034 }
1035
1036 /* Insert nx characters. */
1037 void
1038 screen_write_insertcharacter(struct screen_write_ctx *ctx, u_int nx, u_int bg)
1039 {
1040 struct screen *s = ctx->s;
1041 struct tty_ctx ttyctx;
1042
1043 if (nx == 0)
1044 nx = 1;
1045
1046 if (nx > screen_size_x(s) - s->cx)
1047 nx = screen_size_x(s) - s->cx;
1048 if (nx == 0)
1049 return;
1050
1051 if (s->cx > screen_size_x(s) - 1)
1052 return;
1053
1054 #ifdef ENABLE_SIXEL
1055 if (image_check_line(s, s->cy, 1) && ctx->wp != NULL)
1056 ctx->wp->flags |= PANE_REDRAW;
1057 #endif
1058
1059 screen_write_initctx(ctx, &ttyctx, 0);
1060 ttyctx.bg = bg;
1061
1062 grid_view_insert_cells(s->grid, s->cx, s->cy, nx, bg);
1063
1064 screen_write_collect_flush(ctx, 0, __func__);
1065 ttyctx.num = nx;
1066 tty_write(tty_cmd_insertcharacter, &ttyctx);
1067 }
1068
1069 /* Delete nx characters. */
1070 void
1071 screen_write_deletecharacter(struct screen_write_ctx *ctx, u_int nx, u_int bg)
1072 {
1073 struct screen *s = ctx->s;
1074 struct tty_ctx ttyctx;
1075
1076 if (nx == 0)
1077 nx = 1;
1078
1079 if (nx > screen_size_x(s) - s->cx)
1080 nx = screen_size_x(s) - s->cx;
1081 if (nx == 0)
1082 return;
1083
1084 if (s->cx > screen_size_x(s) - 1)
1085 return;
1086
1087 #ifdef ENABLE_SIXEL
1088 if (image_check_line(s, s->cy, 1) && ctx->wp != NULL)
1089 ctx->wp->flags |= PANE_REDRAW;
1090 #endif
1091
1092 screen_write_initctx(ctx, &ttyctx, 0);
1093 ttyctx.bg = bg;
1094
1095 grid_view_delete_cells(s->grid, s->cx, s->cy, nx, bg);
1096
1097 screen_write_collect_flush(ctx, 0, __func__);
1098 ttyctx.num = nx;
1099 tty_write(tty_cmd_deletecharacter, &ttyctx);
1100 }
1101
1102 /* Clear nx characters. */
1103 void
1104 screen_write_clearcharacter(struct screen_write_ctx *ctx, u_int nx, u_int bg)
1105 {
1106 struct screen *s = ctx->s;
1107 struct tty_ctx ttyctx;
1108
1109 if (nx == 0)
1110 nx = 1;
1111
1112 if (nx > screen_size_x(s) - s->cx)
1113 nx = screen_size_x(s) - s->cx;
1114 if (nx == 0)
1115 return;
1116
1117 if (s->cx > screen_size_x(s) - 1)
1118 return;
1119
1120 #ifdef ENABLE_SIXEL
1121 if (image_check_line(s, s->cy, 1) && ctx->wp != NULL)
1122 ctx->wp->flags |= PANE_REDRAW;
1123 #endif
1124
1125 screen_write_initctx(ctx, &ttyctx, 0);
1126 ttyctx.bg = bg;
1127
1128 grid_view_clear(s->grid, s->cx, s->cy, nx, 1, bg);
1129
1130 screen_write_collect_flush(ctx, 0, __func__);
1131 ttyctx.num = nx;
1132 tty_write(tty_cmd_clearcharacter, &ttyctx);
1133 }
1134
1135 /* Insert ny lines. */
1136 void
1137 screen_write_insertline(struct screen_write_ctx *ctx, u_int ny, u_int bg)
1138 {
1139 struct screen *s = ctx->s;
1140 struct grid *gd = s->grid;
1141 struct tty_ctx ttyctx;
1142
1143 #ifdef ENABLE_SIXEL
1144 u_int sy = screen_size_y(s);
1145 #endif
1146
1147 if (ny == 0)
1148 ny = 1;
1149
1150 #ifdef ENABLE_SIXEL
1151 if (image_check_line(s, s->cy, sy - s->cy) && ctx->wp != NULL)
1152 ctx->wp->flags |= PANE_REDRAW;
1153 #endif
1154
1155 if (s->cy < s->rupper || s->cy > s->rlower) {
1156 if (ny > screen_size_y(s) - s->cy)
1157 ny = screen_size_y(s) - s->cy;
1158 if (ny == 0)
1159 return;
1160
1161 screen_write_initctx(ctx, &ttyctx, 1);
1162 ttyctx.bg = bg;
1163
1164 grid_view_insert_lines(gd, s->cy, ny, bg);
1165
1166 screen_write_collect_flush(ctx, 0, __func__);
1167 ttyctx.num = ny;
1168 tty_write(tty_cmd_insertline, &ttyctx);
1169 return;
1170 }
1171
1172 if (ny > s->rlower + 1 - s->cy)
1173 ny = s->rlower + 1 - s->cy;
1174 if (ny == 0)
1175 return;
1176
1177 screen_write_initctx(ctx, &ttyctx, 1);
1178 ttyctx.bg = bg;
1179
1180 if (s->cy < s->rupper || s->cy > s->rlower)
1181 grid_view_insert_lines(gd, s->cy, ny, bg);
1182 else
1183 grid_view_insert_lines_region(gd, s->rlower, s->cy, ny, bg);
1184
1185 screen_write_collect_flush(ctx, 0, __func__);
1186
1187 ttyctx.num = ny;
1188 tty_write(tty_cmd_insertline, &ttyctx);
1189 }
1190
1191 /* Delete ny lines. */
1192 void
1193 screen_write_deleteline(struct screen_write_ctx *ctx, u_int ny, u_int bg)
1194 {
1195 struct screen *s = ctx->s;
1196 struct grid *gd = s->grid;
1197 struct tty_ctx ttyctx;
1198 u_int sy = screen_size_y(s);
1199
1200 if (ny == 0)
1201 ny = 1;
1202
1203 #ifdef ENABLE_SIXEL
1204 if (image_check_line(s, s->cy, sy - s->cy) && ctx->wp != NULL)
1205 ctx->wp->flags |= PANE_REDRAW;
1206 #endif
1207
1208 if (s->cy < s->rupper || s->cy > s->rlower) {
1209 if (ny > sy - s->cy)
1210 ny = sy - s->cy;
1211 if (ny == 0)
1212 return;
1213
1214 screen_write_initctx(ctx, &ttyctx, 1);
1215 ttyctx.bg = bg;
1216
1217 grid_view_delete_lines(gd, s->cy, ny, bg);
1218
1219 screen_write_collect_flush(ctx, 0, __func__);
1220 ttyctx.num = ny;
1221 tty_write(tty_cmd_deleteline, &ttyctx);
1222 return;
1223 }
1224
1225 if (ny > s->rlower + 1 - s->cy)
1226 ny = s->rlower + 1 - s->cy;
1227 if (ny == 0)
1228 return;
1229
1230 screen_write_initctx(ctx, &ttyctx, 1);
1231 ttyctx.bg = bg;
1232
1233 if (s->cy < s->rupper || s->cy > s->rlower)
1234 grid_view_delete_lines(gd, s->cy, ny, bg);
1235 else
1236 grid_view_delete_lines_region(gd, s->rlower, s->cy, ny, bg);
1237
1238 screen_write_collect_flush(ctx, 0, __func__);
1239 ttyctx.num = ny;
1240 tty_write(tty_cmd_deleteline, &ttyctx);
1241 }
1242
1243 /* Clear line at cursor. */
1244 void
1245 screen_write_clearline(struct screen_write_ctx *ctx, u_int bg)
1246 {
1247 struct screen *s = ctx->s;
1248 struct grid_line *gl;
1249 u_int sx = screen_size_x(s);
1250 struct screen_write_citem *ci = ctx->item;
1251
1252 gl = grid_get_line(s->grid, s->grid->hsize + s->cy);
1253 if (gl->cellsize == 0 && COLOUR_DEFAULT(bg))
1254 return;
1255
1256 #ifdef ENABLE_SIXEL
1257 if (image_check_line(s, s->cy, 1) && ctx->wp != NULL)
1258 ctx->wp->flags |= PANE_REDRAW;
1259 #endif
1260
1261 grid_view_clear(s->grid, 0, s->cy, sx, 1, bg);
1262
1263 screen_write_collect_clear(ctx, s->cy, 1);
1264 ci->x = 0;
1265 ci->used = sx;
1266 ci->type = CLEAR;
1267 ci->bg = bg;
1268 TAILQ_INSERT_TAIL(&ctx->s->write_list[s->cy].items, ci, entry);
1269 ctx->item = screen_write_get_citem();
1270 }
1271
1272 /* Clear to end of line from cursor. */
1273 void
1274 screen_write_clearendofline(struct screen_write_ctx *ctx, u_int bg)
1275 {
1276 struct screen *s = ctx->s;
1277 struct grid_line *gl;
1278 u_int sx = screen_size_x(s);
1279 struct screen_write_citem *ci = ctx->item, *before;
1280
1281 if (s->cx == 0) {
1282 screen_write_clearline(ctx, bg);
1283 return;
1284 }
1285
1286 gl = grid_get_line(s->grid, s->grid->hsize + s->cy);
1287 if (s->cx > sx - 1 || (s->cx >= gl->cellsize && COLOUR_DEFAULT(bg)))
1288 return;
1289
1290 #ifdef ENABLE_SIXEL
1291 if (image_check_line(s, s->cy, 1) && ctx->wp != NULL)
1292 ctx->wp->flags |= PANE_REDRAW;
1293 #endif
1294
1295 grid_view_clear(s->grid, s->cx, s->cy, sx - s->cx, 1, bg);
1296
1297 before = screen_write_collect_trim(ctx, s->cy, s->cx, sx - s->cx, NULL);
1298 ci->x = s->cx;
1299 ci->used = sx - s->cx;
1300 ci->type = CLEAR;
1301 ci->bg = bg;
1302 if (before == NULL)
1303 TAILQ_INSERT_TAIL(&ctx->s->write_list[s->cy].items, ci, entry);
1304 else
1305 TAILQ_INSERT_BEFORE(before, ci, entry);
1306 ctx->item = screen_write_get_citem();
1307 }
1308
1309 /* Clear to start of line from cursor. */
1310 void
1311 screen_write_clearstartofline(struct screen_write_ctx *ctx, u_int bg)
1312 {
1313 struct screen *s = ctx->s;
1314 u_int sx = screen_size_x(s);
1315 struct screen_write_citem *ci = ctx->item, *before;
1316
1317 if (s->cx >= sx - 1) {
1318 screen_write_clearline(ctx, bg);
1319 return;
1320 }
1321
1322 #ifdef ENABLE_SIXEL
1323 if (image_check_line(s, s->cy, 1) && ctx->wp != NULL)
1324 ctx->wp->flags |= PANE_REDRAW;
1325 #endif
1326
1327 if (s->cx > sx - 1)
1328 grid_view_clear(s->grid, 0, s->cy, sx, 1, bg);
1329 else
1330 grid_view_clear(s->grid, 0, s->cy, s->cx + 1, 1, bg);
1331
1332 before = screen_write_collect_trim(ctx, s->cy, 0, s->cx + 1, NULL);
1333 ci->x = 0;
1334 ci->used = s->cx + 1;
1335 ci->type = CLEAR;
1336 ci->bg = bg;
1337 if (before == NULL)
1338 TAILQ_INSERT_TAIL(&ctx->s->write_list[s->cy].items, ci, entry);
1339 else
1340 TAILQ_INSERT_BEFORE(before, ci, entry);
1341 ctx->item = screen_write_get_citem();
1342 }
1343
1344 /* Move cursor to px,py. */
1345 void
1346 screen_write_cursormove(struct screen_write_ctx *ctx, int px, int py,
1347 int origin)
1348 {
1349 struct screen *s = ctx->s;
1350
1351 if (origin && py != -1 && (s->mode & MODE_ORIGIN)) {
1352 if ((u_int)py > s->rlower - s->rupper)
1353 py = s->rlower;
1354 else
1355 py += s->rupper;
1356 }
1357
1358 if (px != -1 && (u_int)px > screen_size_x(s) - 1)
1359 px = screen_size_x(s) - 1;
1360 if (py != -1 && (u_int)py > screen_size_y(s) - 1)
1361 py = screen_size_y(s) - 1;
1362
1363 log_debug("%s: from %u,%u to %u,%u", __func__, s->cx, s->cy, px, py);
1364 screen_write_set_cursor(ctx, px, py);
1365 }
1366
1367 /* Reverse index (up with scroll). */
1368 void
1369 screen_write_reverseindex(struct screen_write_ctx *ctx, u_int bg)
1370 {
1371 struct screen *s = ctx->s;
1372 struct tty_ctx ttyctx;
1373
1374 if (s->cy == s->rupper) {
1375 #ifdef ENABLE_SIXEL
1376 if (image_free_all(s) && ctx->wp != NULL)
1377 ctx->wp->flags |= PANE_REDRAW;
1378 #endif
1379
1380 grid_view_scroll_region_down(s->grid, s->rupper, s->rlower, bg);
1381 screen_write_collect_flush(ctx, 0, __func__);
1382
1383 screen_write_initctx(ctx, &ttyctx, 1);
1384 ttyctx.bg = bg;
1385
1386 tty_write(tty_cmd_reverseindex, &ttyctx);
1387 } else if (s->cy > 0)
1388 screen_write_set_cursor(ctx, -1, s->cy - 1);
1389
1390 }
1391
1392 /* Set scroll region. */
1393 void
1394 screen_write_scrollregion(struct screen_write_ctx *ctx, u_int rupper,
1395 u_int rlower)
1396 {
1397 struct screen *s = ctx->s;
1398
1399 if (rupper > screen_size_y(s) - 1)
1400 rupper = screen_size_y(s) - 1;
1401 if (rlower > screen_size_y(s) - 1)
1402 rlower = screen_size_y(s) - 1;
1403 if (rupper >= rlower) /* cannot be one line */
1404 return;
1405
1406 screen_write_collect_flush(ctx, 0, __func__);
1407
1408 /* Cursor moves to top-left. */
1409 screen_write_set_cursor(ctx, 0, 0);
1410
1411 s->rupper = rupper;
1412 s->rlower = rlower;
1413 }
1414
1415 /* Line feed. */
1416 void
1417 screen_write_linefeed(struct screen_write_ctx *ctx, int wrapped, u_int bg)
1418 {
1419 struct screen *s = ctx->s;
1420 struct grid *gd = s->grid;
1421 struct grid_line *gl;
1422 #ifdef ENABLE_SIXEL
1423 int redraw = 0;
1424 #endif
1425 u_int rupper = s->rupper, rlower = s->rlower;
1426
1427 gl = grid_get_line(gd, gd->hsize + s->cy);
1428 if (wrapped)
1429 gl->flags |= GRID_LINE_WRAPPED;
1430
1431 log_debug("%s: at %u,%u (region %u-%u)", __func__, s->cx, s->cy,
1432 rupper, rlower);
1433
1434 if (bg != ctx->bg) {
1435 screen_write_collect_flush(ctx, 1, __func__);
1436 ctx->bg = bg;
1437 }
1438
1439 if (s->cy == s->rlower) {
1440 #ifdef ENABLE_SIXEL
1441 if (rlower == screen_size_y(s) - 1)
1442 redraw = image_scroll_up(s, 1);
1443 else
1444 redraw = image_check_line(s, rupper, rlower - rupper);
1445 if (redraw && ctx->wp != NULL)
1446 ctx->wp->flags |= PANE_REDRAW;
1447 #endif
1448 grid_view_scroll_region_up(gd, s->rupper, s->rlower, bg);
1449 screen_write_collect_scroll(ctx, bg);
1450 ctx->scrolled++;
1451 } else if (s->cy < screen_size_y(s) - 1)
1452 screen_write_set_cursor(ctx, -1, s->cy + 1);
1453 }
1454
1455 /* Scroll up. */
1456 void
1457 screen_write_scrollup(struct screen_write_ctx *ctx, u_int lines, u_int bg)
1458 {
1459 struct screen *s = ctx->s;
1460 struct grid *gd = s->grid;
1461 u_int i;
1462
1463 if (lines == 0)
1464 lines = 1;
1465 else if (lines > s->rlower - s->rupper + 1)
1466 lines = s->rlower - s->rupper + 1;
1467
1468 if (bg != ctx->bg) {
1469 screen_write_collect_flush(ctx, 1, __func__);
1470 ctx->bg = bg;
1471 }
1472
1473 #ifdef ENABLE_SIXEL
1474 if (image_scroll_up(s, lines) && ctx->wp != NULL)
1475 ctx->wp->flags |= PANE_REDRAW;
1476 #endif
1477
1478 for (i = 0; i < lines; i++) {
1479 grid_view_scroll_region_up(gd, s->rupper, s->rlower, bg);
1480 screen_write_collect_scroll(ctx, bg);
1481 }
1482 ctx->scrolled += lines;
1483 }
1484
1485 /* Scroll down. */
1486 void
1487 screen_write_scrolldown(struct screen_write_ctx *ctx, u_int lines, u_int bg)
1488 {
1489 struct screen *s = ctx->s;
1490 struct grid *gd = s->grid;
1491 struct tty_ctx ttyctx;
1492 u_int i;
1493
1494 screen_write_initctx(ctx, &ttyctx, 1);
1495 ttyctx.bg = bg;
1496
1497 if (lines == 0)
1498 lines = 1;
1499 else if (lines > s->rlower - s->rupper + 1)
1500 lines = s->rlower - s->rupper + 1;
1501
1502 #ifdef ENABLE_SIXEL
1503 if (image_free_all(s) && ctx->wp != NULL)
1504 ctx->wp->flags |= PANE_REDRAW;
1505 #endif
1506
1507 for (i = 0; i < lines; i++)
1508 grid_view_scroll_region_down(gd, s->rupper, s->rlower, bg);
1509
1510 screen_write_collect_flush(ctx, 0, __func__);
1511 ttyctx.num = lines;
1512 tty_write(tty_cmd_scrolldown, &ttyctx);
1513 }
1514
1515 /* Carriage return (cursor to start of line). */
1516 void
1517 screen_write_carriagereturn(struct screen_write_ctx *ctx)
1518 {
1519 screen_write_set_cursor(ctx, 0, -1);
1520 }
1521
1522 /* Clear to end of screen from cursor. */
1523 void
1524 screen_write_clearendofscreen(struct screen_write_ctx *ctx, u_int bg)
1525 {
1526 struct screen *s = ctx->s;
1527 struct grid *gd = s->grid;
1528 struct tty_ctx ttyctx;
1529 u_int sx = screen_size_x(s), sy = screen_size_y(s);
1530
1531 #ifdef ENABLE_SIXEL
1532 if (image_check_line(s, s->cy, sy - s->cy) && ctx->wp != NULL)
1533 ctx->wp->flags |= PANE_REDRAW;
1534 #endif
1535
1536 screen_write_initctx(ctx, &ttyctx, 1);
1537 ttyctx.bg = bg;
1538
1539 /* Scroll into history if it is enabled and clearing entire screen. */
1540 if (s->cx == 0 &&
1541 s->cy == 0 &&
1542 (gd->flags & GRID_HISTORY) &&
1543 ctx->wp != NULL &&
1544 options_get_number(ctx->wp->options, "scroll-on-clear"))
1545 grid_view_clear_history(gd, bg);
1546 else {
1547 if (s->cx <= sx - 1)
1548 grid_view_clear(gd, s->cx, s->cy, sx - s->cx, 1, bg);
1549 grid_view_clear(gd, 0, s->cy + 1, sx, sy - (s->cy + 1), bg);
1550 }
1551
1552 screen_write_collect_clear(ctx, s->cy + 1, sy - (s->cy + 1));
1553 screen_write_collect_flush(ctx, 0, __func__);
1554 tty_write(tty_cmd_clearendofscreen, &ttyctx);
1555 }
1556
1557 /* Clear to start of screen. */
1558 void
1559 screen_write_clearstartofscreen(struct screen_write_ctx *ctx, u_int bg)
1560 {
1561 struct screen *s = ctx->s;
1562 struct tty_ctx ttyctx;
1563 u_int sx = screen_size_x(s);
1564
1565 #ifdef ENABLE_SIXEL
1566 if (image_check_line(s, 0, s->cy - 1) && ctx->wp != NULL)
1567 ctx->wp->flags |= PANE_REDRAW;
1568 #endif
1569
1570 screen_write_initctx(ctx, &ttyctx, 1);
1571 ttyctx.bg = bg;
1572
1573 if (s->cy > 0)
1574 grid_view_clear(s->grid, 0, 0, sx, s->cy, bg);
1575 if (s->cx > sx - 1)
1576 grid_view_clear(s->grid, 0, s->cy, sx, 1, bg);
1577 else
1578 grid_view_clear(s->grid, 0, s->cy, s->cx + 1, 1, bg);
1579
1580 screen_write_collect_clear(ctx, 0, s->cy);
1581 screen_write_collect_flush(ctx, 0, __func__);
1582 tty_write(tty_cmd_clearstartofscreen, &ttyctx);
1583 }
1584
1585 /* Clear entire screen. */
1586 void
1587 screen_write_clearscreen(struct screen_write_ctx *ctx, u_int bg)
1588 {
1589 struct screen *s = ctx->s;
1590 struct tty_ctx ttyctx;
1591 u_int sx = screen_size_x(s), sy = screen_size_y(s);
1592
1593 #ifdef ENABLE_SIXEL
1594 if (image_free_all(s) && ctx->wp != NULL)
1595 ctx->wp->flags |= PANE_REDRAW;
1596 #endif
1597
1598 screen_write_initctx(ctx, &ttyctx, 1);
1599 ttyctx.bg = bg;
1600
1601 /* Scroll into history if it is enabled. */
1602 if ((s->grid->flags & GRID_HISTORY) &&
1603 ctx->wp != NULL &&
1604 options_get_number(ctx->wp->options, "scroll-on-clear"))
1605 grid_view_clear_history(s->grid, bg);
1606 else
1607 grid_view_clear(s->grid, 0, 0, sx, sy, bg);
1608
1609 screen_write_collect_clear(ctx, 0, sy);
1610 tty_write(tty_cmd_clearscreen, &ttyctx);
1611 }
1612
1613 /* Clear entire history. */
1614 void
1615 screen_write_clearhistory(struct screen_write_ctx *ctx)
1616 {
1617 grid_clear_history(ctx->s->grid);
1618 }
1619
1620 /* Force a full redraw. */
1621 void
1622 screen_write_fullredraw(struct screen_write_ctx *ctx)
1623 {
1624 struct tty_ctx ttyctx;
1625
1626 screen_write_collect_flush(ctx, 0, __func__);
1627
1628 screen_write_initctx(ctx, &ttyctx, 1);
1629 if (ttyctx.redraw_cb != NULL)
1630 ttyctx.redraw_cb(&ttyctx);
1631 }
1632
1633 /* Trim collected items. */
1634 static struct screen_write_citem *
1635 screen_write_collect_trim(struct screen_write_ctx *ctx, u_int y, u_int x,
1636 u_int used, int *wrapped)
1637 {
1638 struct screen_write_cline *cl = &ctx->s->write_list[y];
1639 struct screen_write_citem *ci, *ci2, *tmp, *before = NULL;
1640 u_int sx = x, ex = x + used - 1;
1641 u_int csx, cex;
1642
1643 if (TAILQ_EMPTY(&cl->items))
1644 return (NULL);
1645 TAILQ_FOREACH_SAFE(ci, &cl->items, entry, tmp) {
1646 csx = ci->x;
1647 cex = ci->x + ci->used - 1;
1648
1649 /* Item is entirely before. */
1650 if (cex < sx) {
1651 log_debug("%s: %p %u-%u before %u-%u", __func__, ci,
1652 csx, cex, sx, ex);
1653 continue;
1654 }
1655
1656 /* Item is entirely after. */
1657 if (csx > ex) {
1658 log_debug("%s: %p %u-%u after %u-%u", __func__, ci,
1659 csx, cex, sx, ex);
1660 before = ci;
1661 break;
1662 }
1663
1664 /* Item is entirely inside. */
1665 if (csx >= sx && cex <= ex) {
1666 log_debug("%s: %p %u-%u inside %u-%u", __func__, ci,
1667 csx, cex, sx, ex);
1668 TAILQ_REMOVE(&cl->items, ci, entry);
1669 screen_write_free_citem(ci);
1670 if (csx == 0 && ci->wrapped && wrapped != NULL)
1671 *wrapped = 1;
1672 continue;
1673 }
1674
1675 /* Item under the start. */
1676 if (csx < sx && cex >= sx && cex <= ex) {
1677 log_debug("%s: %p %u-%u start %u-%u", __func__, ci,
1678 csx, cex, sx, ex);
1679 ci->used = sx - csx;
1680 log_debug("%s: %p now %u-%u", __func__, ci, ci->x,
1681 ci->x + ci->used + 1);
1682 continue;
1683 }
1684
1685 /* Item covers the end. */
1686 if (cex > ex && csx >= sx && csx <= ex) {
1687 log_debug("%s: %p %u-%u end %u-%u", __func__, ci,
1688 csx, cex, sx, ex);
1689 ci->x = ex + 1;
1690 ci->used = cex - ex;
1691 log_debug("%s: %p now %u-%u", __func__, ci, ci->x,
1692 ci->x + ci->used + 1);
1693 before = ci;
1694 break;
1695 }
1696
1697 /* Item must cover both sides. */
1698 log_debug("%s: %p %u-%u under %u-%u", __func__, ci,
1699 csx, cex, sx, ex);
1700 ci2 = screen_write_get_citem();
1701 ci2->type = ci->type;
1702 ci2->bg = ci->bg;
1703 memcpy(&ci2->gc, &ci->gc, sizeof ci2->gc);
1704 TAILQ_INSERT_AFTER(&cl->items, ci, ci2, entry);
1705
1706 ci->used = sx - csx;
1707 ci2->x = ex + 1;
1708 ci2->used = cex - ex;
1709
1710 log_debug("%s: %p now %u-%u (%p) and %u-%u (%p)", __func__, ci,
1711 ci->x, ci->x + ci->used - 1, ci, ci2->x,
1712 ci2->x + ci2->used - 1, ci2);
1713 before = ci2;
1714 break;
1715 }
1716 return (before);
1717 }
1718
1719 /* Clear collected lines. */
1720 static void
1721 screen_write_collect_clear(struct screen_write_ctx *ctx, u_int y, u_int n)
1722 {
1723 struct screen_write_cline *cl;
1724 u_int i;
1725
1726 for (i = y; i < y + n; i++) {
1727 cl = &ctx->s->write_list[i];
1728 TAILQ_CONCAT(&screen_write_citem_freelist, &cl->items, entry);
1729 }
1730 }
1731
1732 /* Scroll collected lines up. */
1733 static void
1734 screen_write_collect_scroll(struct screen_write_ctx *ctx, u_int bg)
1735 {
1736 struct screen *s = ctx->s;
1737 struct screen_write_cline *cl;
1738 u_int y;
1739 char *saved;
1740 struct screen_write_citem *ci;
1741
1742 log_debug("%s: at %u,%u (region %u-%u)", __func__, s->cx, s->cy,
1743 s->rupper, s->rlower);
1744
1745 screen_write_collect_clear(ctx, s->rupper, 1);
1746 saved = ctx->s->write_list[s->rupper].data;
1747 for (y = s->rupper; y < s->rlower; y++) {
1748 cl = &ctx->s->write_list[y + 1];
1749 TAILQ_CONCAT(&ctx->s->write_list[y].items, &cl->items, entry);
1750 ctx->s->write_list[y].data = cl->data;
1751 }
1752 ctx->s->write_list[s->rlower].data = saved;
1753
1754 ci = screen_write_get_citem();
1755 ci->x = 0;
1756 ci->used = screen_size_x(s);
1757 ci->type = CLEAR;
1758 ci->bg = bg;
1759 TAILQ_INSERT_TAIL(&ctx->s->write_list[s->rlower].items, ci, entry);
1760 }
1761
1762 /* Flush collected lines. */
1763 static void
1764 screen_write_collect_flush(struct screen_write_ctx *ctx, int scroll_only,
1765 const char *from)
1766 {
1767 struct screen *s = ctx->s;
1768 struct screen_write_citem *ci, *tmp;
1769 struct screen_write_cline *cl;
1770 u_int y, cx, cy, last, items = 0;
1771 struct tty_ctx ttyctx;
1772
1773 if (ctx->scrolled != 0) {
1774 log_debug("%s: scrolled %u (region %u-%u)", __func__,
1775 ctx->scrolled, s->rupper, s->rlower);
1776 if (ctx->scrolled > s->rlower - s->rupper + 1)
1777 ctx->scrolled = s->rlower - s->rupper + 1;
1778
1779 screen_write_initctx(ctx, &ttyctx, 1);
1780 ttyctx.num = ctx->scrolled;
1781 ttyctx.bg = ctx->bg;
1782 tty_write(tty_cmd_scrollup, &ttyctx);
1783 }
1784 ctx->scrolled = 0;
1785 ctx->bg = 8;
1786
1787 if (scroll_only)
1788 return;
1789
1790 cx = s->cx; cy = s->cy;
1791 for (y = 0; y < screen_size_y(s); y++) {
1792 cl = &ctx->s->write_list[y];
1793 last = UINT_MAX;
1794 TAILQ_FOREACH_SAFE(ci, &cl->items, entry, tmp) {
1795 if (last != UINT_MAX && ci->x <= last) {
1796 fatalx("collect list not in order: %u <= %u",
1797 ci->x, last);
1798 }
1799 screen_write_set_cursor(ctx, ci->x, y);
1800 if (ci->type == CLEAR) {
1801 screen_write_initctx(ctx, &ttyctx, 1);
1802 ttyctx.bg = ci->bg;
1803 ttyctx.num = ci->used;
1804 tty_write(tty_cmd_clearcharacter, &ttyctx);
1805 } else {
1806 screen_write_initctx(ctx, &ttyctx, 0);
1807 ttyctx.cell = &ci->gc;
1808 ttyctx.wrapped = ci->wrapped;
1809 ttyctx.ptr = cl->data + ci->x;
1810 ttyctx.num = ci->used;
1811 tty_write(tty_cmd_cells, &ttyctx);
1812 }
1813 items++;
1814
1815 TAILQ_REMOVE(&cl->items, ci, entry);
1816 screen_write_free_citem(ci);
1817 last = ci->x;
1818 }
1819 }
1820 s->cx = cx; s->cy = cy;
1821
1822 log_debug("%s: flushed %u items (%s)", __func__, items, from);
1823 }
1824
1825 /* Finish and store collected cells. */
1826 void
1827 screen_write_collect_end(struct screen_write_ctx *ctx)
1828 {
1829 struct screen *s = ctx->s;
1830 struct screen_write_citem *ci = ctx->item, *before;
1831 struct screen_write_cline *cl = &s->write_list[s->cy];
1832 struct grid_cell gc;
1833 u_int xx;
1834 int wrapped = ci->wrapped;
1835
1836 if (ci->used == 0)
1837 return;
1838
1839 before = screen_write_collect_trim(ctx, s->cy, s->cx, ci->used,
1840 &wrapped);
1841 ci->x = s->cx;
1842 ci->wrapped = wrapped;
1843 if (before == NULL)
1844 TAILQ_INSERT_TAIL(&cl->items, ci, entry);
1845 else
1846 TAILQ_INSERT_BEFORE(before, ci, entry);
1847 ctx->item = screen_write_get_citem();
1848
1849 log_debug("%s: %u %.*s (at %u,%u)", __func__, ci->used,
1850 (int)ci->used, cl->data + ci->x, s->cx, s->cy);
1851
1852 if (s->cx != 0) {
1853 for (xx = s->cx; xx > 0; xx--) {
1854 grid_view_get_cell(s->grid, xx, s->cy, &gc);
1855 if (~gc.flags & GRID_FLAG_PADDING)
1856 break;
1857 grid_view_set_cell(s->grid, xx, s->cy,
1858 &grid_default_cell);
1859 }
1860 if (gc.data.width > 1) {
1861 grid_view_set_cell(s->grid, xx, s->cy,
1862 &grid_default_cell);
1863 }
1864 }
1865
1866 #ifdef ENABLE_SIXEL
1867 if (image_check_area(s, s->cx, s->cy, ci->used, 1) && ctx->wp != NULL)
1868 ctx->wp->flags |= PANE_REDRAW;
1869 #endif
1870
1871 grid_view_set_cells(s->grid, s->cx, s->cy, &ci->gc, cl->data + ci->x,
1872 ci->used);
1873 screen_write_set_cursor(ctx, s->cx + ci->used, -1);
1874
1875 for (xx = s->cx; xx < screen_size_x(s); xx++) {
1876 grid_view_get_cell(s->grid, xx, s->cy, &gc);
1877 if (~gc.flags & GRID_FLAG_PADDING)
1878 break;
1879 grid_view_set_cell(s->grid, xx, s->cy, &grid_default_cell);
1880 }
1881 }
1882
1883 /* Write cell data, collecting if necessary. */
1884 void
1885 screen_write_collect_add(struct screen_write_ctx *ctx,
1886 const struct grid_cell *gc)
1887 {
1888 struct screen *s = ctx->s;
1889 struct screen_write_citem *ci;
1890 u_int sx = screen_size_x(s);
1891 int collect;
1892
1893 /*
1894 * Don't need to check that the attributes and whatnot are still the
1895 * same - input_parse will end the collection when anything that isn't
1896 * a plain character is encountered.
1897 */
1898
1899 collect = 1;
1900 if (gc->data.width != 1 || gc->data.size != 1 || *gc->data.data >= 0x7f)
1901 collect = 0;
1902 else if (gc->attr & GRID_ATTR_CHARSET)
1903 collect = 0;
1904 else if (~s->mode & MODE_WRAP)
1905 collect = 0;
1906 else if (s->mode & MODE_INSERT)
1907 collect = 0;
1908 else if (s->sel != NULL)
1909 collect = 0;
1910 if (!collect) {
1911 screen_write_collect_end(ctx);
1912 screen_write_collect_flush(ctx, 0, __func__);
1913 screen_write_cell(ctx, gc);
1914 return;
1915 }
1916
1917 if (s->cx > sx - 1 || ctx->item->used > sx - 1 - s->cx)
1918 screen_write_collect_end(ctx);
1919 ci = ctx->item; /* may have changed */
1920
1921 if (s->cx > sx - 1) {
1922 log_debug("%s: wrapped at %u,%u", __func__, s->cx, s->cy);
1923 ci->wrapped = 1;
1924 screen_write_linefeed(ctx, 1, 8);
1925 screen_write_set_cursor(ctx, 0, -1);
1926 }
1927
1928 if (ci->used == 0)
1929 memcpy(&ci->gc, gc, sizeof ci->gc);
1930 if (ctx->s->write_list[s->cy].data == NULL)
1931 ctx->s->write_list[s->cy].data = xmalloc(screen_size_x(ctx->s));
1932 ctx->s->write_list[s->cy].data[s->cx + ci->used++] = gc->data.data[0];
1933 }
1934
1935 /* Write cell data. */
1936 void
1937 screen_write_cell(struct screen_write_ctx *ctx, const struct grid_cell *gc)
1938 {
1939 struct screen *s = ctx->s;
1940 struct grid *gd = s->grid;
1941 const struct utf8_data *ud = &gc->data;
1942 struct grid_line *gl;
1943 struct grid_cell_entry *gce;
1944 struct grid_cell tmp_gc, now_gc;
1945 struct tty_ctx ttyctx;
1946 u_int sx = screen_size_x(s), sy = screen_size_y(s);
1947 u_int width = ud->width, xx, not_wrap;
1948 int selected, skip = 1;
1949
1950 /* Ignore padding cells. */
1951 if (gc->flags & GRID_FLAG_PADDING)
1952 return;
1953
1954 /* Get the previous cell to check for combining. */
1955 if (screen_write_combine(ctx, gc) != 0)
1956 return;
1957
1958 /* Flush any existing scrolling. */
1959 screen_write_collect_flush(ctx, 1, __func__);
1960
1961 /* If this character doesn't fit, ignore it. */
1962 if ((~s->mode & MODE_WRAP) &&
1963 width > 1 &&
1964 (width > sx || (s->cx != sx && s->cx > sx - width)))
1965 return;
1966
1967 /* If in insert mode, make space for the cells. */
1968 if (s->mode & MODE_INSERT) {
1969 grid_view_insert_cells(s->grid, s->cx, s->cy, width, 8);
1970 skip = 0;
1971 }
1972
1973 /* Check this will fit on the current line and wrap if not. */
1974 if ((s->mode & MODE_WRAP) && s->cx > sx - width) {
1975 log_debug("%s: wrapped at %u,%u", __func__, s->cx, s->cy);
1976 screen_write_linefeed(ctx, 1, 8);
1977 screen_write_set_cursor(ctx, 0, -1);
1978 screen_write_collect_flush(ctx, 1, __func__);
1979 }
1980
1981 /* Sanity check cursor position. */
1982 if (s->cx > sx - width || s->cy > sy - 1)
1983 return;
1984 screen_write_initctx(ctx, &ttyctx, 0);
1985
1986 /* Handle overwriting of UTF-8 characters. */
1987 gl = grid_get_line(s->grid, s->grid->hsize + s->cy);
1988 if (gl->flags & GRID_LINE_EXTENDED) {
1989 grid_view_get_cell(gd, s->cx, s->cy, &now_gc);
1990 if (screen_write_overwrite(ctx, &now_gc, width))
1991 skip = 0;
1992 }
1993
1994 /*
1995 * If the new character is UTF-8 wide, fill in padding cells. Have
1996 * already ensured there is enough room.
1997 */
1998 for (xx = s->cx + 1; xx < s->cx + width; xx++) {
1999 log_debug("%s: new padding at %u,%u", __func__, xx, s->cy);
2000 grid_view_set_padding(gd, xx, s->cy);
2001 skip = 0;
2002 }
2003
2004 /* If no change, do not draw. */
2005 if (skip) {
2006 if (s->cx >= gl->cellsize)
2007 skip = grid_cells_equal(gc, &grid_default_cell);
2008 else {
2009 gce = &gl->celldata[s->cx];
2010 if (gce->flags & GRID_FLAG_EXTENDED)
2011 skip = 0;
2012 else if (gc->flags != gce->flags)
2013 skip = 0;
2014 else if (gc->attr != gce->data.attr)
2015 skip = 0;
2016 else if (gc->fg != gce->data.fg)
2017 skip = 0;
2018 else if (gc->bg != gce->data.bg)
2019 skip = 0;
2020 else if (gc->data.width != 1)
2021 skip = 0;
2022 else if (gc->data.size != 1)
2023 skip = 0;
2024 else if (gce->data.data != gc->data.data[0])
2025 skip = 0;
2026 }
2027 }
2028
2029 /* Update the selected flag and set the cell. */
2030 selected = screen_check_selection(s, s->cx, s->cy);
2031 if (selected && (~gc->flags & GRID_FLAG_SELECTED)) {
2032 memcpy(&tmp_gc, gc, sizeof tmp_gc);
2033 tmp_gc.flags |= GRID_FLAG_SELECTED;
2034 grid_view_set_cell(gd, s->cx, s->cy, &tmp_gc);
2035 } else if (!selected && (gc->flags & GRID_FLAG_SELECTED)) {
2036 memcpy(&tmp_gc, gc, sizeof tmp_gc);
2037 tmp_gc.flags &= ~GRID_FLAG_SELECTED;
2038 grid_view_set_cell(gd, s->cx, s->cy, &tmp_gc);
2039 } else if (!skip)
2040 grid_view_set_cell(gd, s->cx, s->cy, gc);
2041 if (selected)
2042 skip = 0;
2043
2044 /*
2045 * Move the cursor. If not wrapping, stick at the last character and
2046 * replace it.
2047 */
2048 not_wrap = !(s->mode & MODE_WRAP);
2049 if (s->cx <= sx - not_wrap - width)
2050 screen_write_set_cursor(ctx, s->cx + width, -1);
2051 else
2052 screen_write_set_cursor(ctx, sx - not_wrap, -1);
2053
2054 /* Create space for character in insert mode. */
2055 if (s->mode & MODE_INSERT) {
2056 screen_write_collect_flush(ctx, 0, __func__);
2057 ttyctx.num = width;
2058 tty_write(tty_cmd_insertcharacter, &ttyctx);
2059 }
2060
2061 /* Write to the screen. */
2062 if (!skip) {
2063 if (selected) {
2064 screen_select_cell(s, &tmp_gc, gc);
2065 ttyctx.cell = &tmp_gc;
2066 } else
2067 ttyctx.cell = gc;
2068 tty_write(tty_cmd_cell, &ttyctx);
2069 }
2070 }
2071
2072 /* Combine a UTF-8 zero-width character onto the previous if necessary. */
2073 static int
2074 screen_write_combine(struct screen_write_ctx *ctx, const struct grid_cell *gc)
2075 {
2076 struct screen *s = ctx->s;
2077 struct grid *gd = s->grid;
2078 const struct utf8_data *ud = &gc->data;
2079 u_int n, cx = s->cx, cy = s->cy;
2080 struct grid_cell last;
2081 struct tty_ctx ttyctx;
2082 int force_wide = 0, zero_width = 0;
2083
2084 /*
2085 * Is this character which makes no sense without being combined? If
2086 * this is true then flag it here and discard the character (return 1)
2087 * if we cannot combine it.
2088 */
2089 if (utf8_is_zwj(ud))
2090 zero_width = 1;
2091 else if (utf8_is_vs(ud))
2092 zero_width = force_wide = 1;
2093 else if (ud->width == 0)
2094 zero_width = 1;
2095
2096 /* Cannot combine empty character or at left. */
2097 if (ud->size < 2 || cx == 0)
2098 return (zero_width);
2099 log_debug("%s: character %.*s at %u,%u (width %u)", __func__,
2100 (int)ud->size, ud->data, cx, cy, ud->width);
2101
2102 /* Find the cell to combine with. */
2103 n = 1;
2104 grid_view_get_cell(gd, cx - n, cy, &last);
2105 if (cx != 1 && (last.flags & GRID_FLAG_PADDING)) {
2106 n = 2;
2107 grid_view_get_cell(gd, cx - n, cy, &last);
2108 }
2109 if (n != last.data.width || (last.flags & GRID_FLAG_PADDING))
2110 return (zero_width);
2111
2112 /*
2113 * Check if we need to combine characters. This could be zero width
2114 * (set above), a modifier character (with an existing Unicode
2115 * character) or a previous ZWJ.
2116 */
2117 if (!zero_width) {
2118 if (utf8_is_modifier(ud)) {
2119 if (last.data.size < 2)
2120 return (0);
2121 force_wide = 1;
2122 } else if (!utf8_has_zwj(&last.data))
2123 return (0);
2124 }
2125
2126 /* Check if this combined character would be too long. */
2127 if (last.data.size + ud->size > sizeof last.data.data)
2128 return (0);
2129
2130 /* Combining; flush any pending output. */
2131 screen_write_collect_flush(ctx, 0, __func__);
2132
2133 log_debug("%s: %.*s -> %.*s at %u,%u (offset %u, width %u)", __func__,
2134 (int)ud->size, ud->data, (int)last.data.size, last.data.data,
2135 cx - n, cy, n, last.data.width);
2136
2137 /* Append the data. */
2138 memcpy(last.data.data + last.data.size, ud->data, ud->size);
2139 last.data.size += ud->size;
2140
2141 /* Force the width to 2 for modifiers and variation selector. */
2142 if (last.data.width == 1 && force_wide) {
2143 last.data.width = 2;
2144 n = 2;
2145 cx++;
2146 } else
2147 force_wide = 0;
2148
2149 /* Set the new cell. */
2150 grid_view_set_cell(gd, cx - n, cy, &last);
2151 if (force_wide)
2152 grid_view_set_padding(gd, cx - 1, cy);
2153
2154 /*
2155 * Redraw the combined cell. If forcing the cell to width 2, reset the
2156 * cached cursor position in the tty, since we don't really know
2157 * whether the terminal thought the character was width 1 or width 2
2158 * and what it is going to do now.
2159 */
2160 screen_write_set_cursor(ctx, cx - n, cy);
2161 screen_write_initctx(ctx, &ttyctx, 0);
2162 ttyctx.cell = &last;
2163 ttyctx.num = force_wide; /* reset cached cursor position */
2164 tty_write(tty_cmd_cell, &ttyctx);
2165 screen_write_set_cursor(ctx, cx, cy);
2166
2167 return (1);
2168 }
2169
2170 /*
2171 * UTF-8 wide characters are a bit of an annoyance. They take up more than one
2172 * cell on the screen, so following cells must not be drawn by marking them as
2173 * padding.
2174 *
2175 * So far, so good. The problem is, when overwriting a padding cell, or a UTF-8
2176 * character, it is necessary to also overwrite any other cells which covered
2177 * by the same character.
2178 */
2179 static int
2180 screen_write_overwrite(struct screen_write_ctx *ctx, struct grid_cell *gc,
2181 u_int width)
2182 {
2183 struct screen *s = ctx->s;
2184 struct grid *gd = s->grid;
2185 struct grid_cell tmp_gc;
2186 u_int xx;
2187 int done = 0;
2188
2189 if (gc->flags & GRID_FLAG_PADDING) {
2190 /*
2191 * A padding cell, so clear any following and leading padding
2192 * cells back to the character. Don't overwrite the current
2193 * cell as that happens later anyway.
2194 */
2195 xx = s->cx + 1;
2196 while (--xx > 0) {
2197 grid_view_get_cell(gd, xx, s->cy, &tmp_gc);
2198 if (~tmp_gc.flags & GRID_FLAG_PADDING)
2199 break;
2200 log_debug("%s: padding at %u,%u", __func__, xx, s->cy);
2201 grid_view_set_cell(gd, xx, s->cy, &grid_default_cell);
2202 }
2203
2204 /* Overwrite the character at the start of this padding. */
2205 log_debug("%s: character at %u,%u", __func__, xx, s->cy);
2206 grid_view_set_cell(gd, xx, s->cy, &grid_default_cell);
2207 done = 1;
2208 }
2209
2210 /*
2211 * Overwrite any padding cells that belong to any UTF-8 characters
2212 * we'll be overwriting with the current character.
2213 */
2214 if (width != 1 ||
2215 gc->data.width != 1 ||
2216 gc->flags & GRID_FLAG_PADDING) {
2217 xx = s->cx + width - 1;
2218 while (++xx < screen_size_x(s)) {
2219 grid_view_get_cell(gd, xx, s->cy, &tmp_gc);
2220 if (~tmp_gc.flags & GRID_FLAG_PADDING)
2221 break;
2222 log_debug("%s: overwrite at %u,%u", __func__, xx,
2223 s->cy);
2224 grid_view_set_cell(gd, xx, s->cy, &grid_default_cell);
2225 done = 1;
2226 }
2227 }
2228
2229 return (done);
2230 }
2231
2232 /* Set external clipboard. */
2233 void
2234 screen_write_setselection(struct screen_write_ctx *ctx, const char *flags,
2235 u_char *str, u_int len)
2236 {
2237 struct tty_ctx ttyctx;
2238
2239 screen_write_initctx(ctx, &ttyctx, 0);
2240 ttyctx.ptr = str;
2241 ttyctx.ptr2 = (void *)flags;
2242 ttyctx.num = len;
2243
2244 tty_write(tty_cmd_setselection, &ttyctx);
2245 }
2246
2247 /* Write unmodified string. */
2248 void
2249 screen_write_rawstring(struct screen_write_ctx *ctx, u_char *str, u_int len,
2250 int allow_invisible_panes)
2251 {
2252 struct tty_ctx ttyctx;
2253
2254 screen_write_initctx(ctx, &ttyctx, 0);
2255 ttyctx.ptr = str;
2256 ttyctx.num = len;
2257 ttyctx.allow_invisible_panes = allow_invisible_panes;
2258
2259 tty_write(tty_cmd_rawstring, &ttyctx);
2260 }
2261
2262 #ifdef ENABLE_SIXEL
2263 /* Write a SIXEL image. */
2264 void
2265 screen_write_sixelimage(struct screen_write_ctx *ctx, struct sixel_image *si,
2266 u_int bg)
2267 {
2268 struct screen *s = ctx->s;
2269 struct grid *gd = s->grid;
2270 struct tty_ctx ttyctx;
2271 u_int x, y, sx, sy, cx = s->cx, cy = s->cy, i, lines;
2272 struct sixel_image *new;
2273
2274 sixel_size_in_cells(si, &x, &y);
2275 if (x > screen_size_x(s) || y > screen_size_y(s)) {
2276 if (x > screen_size_x(s) - cx)
2277 sx = screen_size_x(s) - cx;
2278 else
2279 sx = x;
2280 if (y > screen_size_y(s) - 1)
2281 sy = screen_size_y(s) - 1;
2282 else
2283 sy = y;
2284 new = sixel_scale(si, 0, 0, 0, y - sy, sx, sy, 1);
2285 sixel_free(si);
2286 si = new;
2287
2288 /* Bail out if the image cannot be scaled. */
2289 if (si == NULL)
2290 return;
2291 sixel_size_in_cells(si, &x, &y);
2292 }
2293
2294 sy = screen_size_y(s) - cy;
2295 if (sy < y) {
2296 lines = y - sy + 1;
2297 if (image_scroll_up(s, lines) && ctx->wp != NULL)
2298 ctx->wp->flags |= PANE_REDRAW;
2299 for (i = 0; i < lines; i++) {
2300 grid_view_scroll_region_up(gd, 0, screen_size_y(s) - 1,
2301 bg);
2302 screen_write_collect_scroll(ctx, bg);
2303 }
2304 ctx->scrolled += lines;
2305 if (lines > cy)
2306 screen_write_cursormove(ctx, -1, 0, 0);
2307 else
2308 screen_write_cursormove(ctx, -1, cy - lines, 0);
2309 }
2310 screen_write_collect_flush(ctx, 0, __func__);
2311
2312 screen_write_initctx(ctx, &ttyctx, 0);
2313 ttyctx.ptr = image_store(s, si);
2314
2315 tty_write(tty_cmd_sixelimage, &ttyctx);
2316
2317 screen_write_cursormove(ctx, 0, cy + y, 0);
2318 }
2319 #endif
2320
2321 /* Turn alternate screen on. */
2322 void
2323 screen_write_alternateon(struct screen_write_ctx *ctx, struct grid_cell *gc,
2324 int cursor)
2325 {
2326 struct tty_ctx ttyctx;
2327 struct window_pane *wp = ctx->wp;
2328
2329 if (wp != NULL && !options_get_number(wp->options, "alternate-screen"))
2330 return;
2331
2332 screen_write_collect_flush(ctx, 0, __func__);
2333 screen_alternate_on(ctx->s, gc, cursor);
2334
2335 screen_write_initctx(ctx, &ttyctx, 1);
2336 if (ttyctx.redraw_cb != NULL)
2337 ttyctx.redraw_cb(&ttyctx);
2338 }
2339
2340 /* Turn alternate screen off. */
2341 void
2342 screen_write_alternateoff(struct screen_write_ctx *ctx, struct grid_cell *gc,
2343 int cursor)
2344 {
2345 struct tty_ctx ttyctx;
2346 struct window_pane *wp = ctx->wp;
2347
2348 if (wp != NULL && !options_get_number(wp->options, "alternate-screen"))
2349 return;
2350
2351 screen_write_collect_flush(ctx, 0, __func__);
2352 screen_alternate_off(ctx->s, gc, cursor);
2353
2354 screen_write_initctx(ctx, &ttyctx, 1);
2355 if (ttyctx.redraw_cb != NULL)
2356 ttyctx.redraw_cb(&ttyctx);
2357 }
tmux -- terminal multiplexer similar to GNU Screen