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Add an option (scroll-on-clear) to control if tmux scrolls into history
[tmux.git] / screen-redraw.c
blobc4906ab87dfeaa87b9a1cefbb4625f84e5bdf217
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 void screen_redraw_draw_borders(struct screen_redraw_ctx *);
27 static void screen_redraw_draw_panes(struct screen_redraw_ctx *);
28 static void screen_redraw_draw_status(struct screen_redraw_ctx *);
29 static void screen_redraw_draw_pane(struct screen_redraw_ctx *,
30 struct window_pane *);
31 static void screen_redraw_set_context(struct client *,
32 struct screen_redraw_ctx *);
33
34 #define START_ISOLATE "\342\201\246"
35 #define END_ISOLATE "\342\201\251"
36
37 /* Border in relation to a pane. */
38 enum screen_redraw_border_type {
39 SCREEN_REDRAW_OUTSIDE,
40 SCREEN_REDRAW_INSIDE,
41 SCREEN_REDRAW_BORDER_LEFT,
42 SCREEN_REDRAW_BORDER_RIGHT,
43 SCREEN_REDRAW_BORDER_TOP,
44 SCREEN_REDRAW_BORDER_BOTTOM
45 };
46 #define BORDER_MARKERS " +,.-"
47
48 /* Get cell border character. */
49 static void
50 screen_redraw_border_set(struct window *w, struct window_pane *wp,
51 enum pane_lines pane_lines, int cell_type, struct grid_cell *gc)
52 {
53 u_int idx;
54
55 if (cell_type == CELL_OUTSIDE && w->fill_character != NULL) {
56 utf8_copy(&gc->data, &w->fill_character[0]);
57 return;
58 }
59
60 switch (pane_lines) {
61 case PANE_LINES_NUMBER:
62 if (cell_type == CELL_OUTSIDE) {
63 gc->attr |= GRID_ATTR_CHARSET;
64 utf8_set(&gc->data, CELL_BORDERS[CELL_OUTSIDE]);
65 break;
66 }
67 gc->attr &= ~GRID_ATTR_CHARSET;
68 if (wp != NULL && window_pane_index(wp, &idx) == 0)
69 utf8_set(&gc->data, '0' + (idx % 10));
70 else
71 utf8_set(&gc->data, '*');
72 break;
73 case PANE_LINES_DOUBLE:
74 gc->attr &= ~GRID_ATTR_CHARSET;
75 utf8_copy(&gc->data, tty_acs_double_borders(cell_type));
76 break;
77 case PANE_LINES_HEAVY:
78 gc->attr &= ~GRID_ATTR_CHARSET;
79 utf8_copy(&gc->data, tty_acs_heavy_borders(cell_type));
80 break;
81 case PANE_LINES_SIMPLE:
82 gc->attr &= ~GRID_ATTR_CHARSET;
83 utf8_set(&gc->data, SIMPLE_BORDERS[cell_type]);
84 break;
85 default:
86 gc->attr |= GRID_ATTR_CHARSET;
87 utf8_set(&gc->data, CELL_BORDERS[cell_type]);
88 break;
89 }
90 }
91
92 /* Return if window has only two panes. */
93 static int
94 screen_redraw_two_panes(struct window *w, int direction)
95 {
96 struct window_pane *wp;
97
98 wp = TAILQ_NEXT(TAILQ_FIRST(&w->panes), entry);
99 if (wp == NULL)
100 return (0); /* one pane */
101 if (TAILQ_NEXT(wp, entry) != NULL)
102 return (0); /* more than two panes */
103 if (direction == 0 && wp->xoff == 0)
104 return (0);
105 if (direction == 1 && wp->yoff == 0)
106 return (0);
107 return (1);
108 }
109
110 /* Check if cell is on the border of a pane. */
111 static enum screen_redraw_border_type
112 screen_redraw_pane_border(struct window_pane *wp, u_int px, u_int py,
113 int pane_status)
114 {
115 struct options *oo = wp->window->options;
116 int split = 0;
117 u_int ex = wp->xoff + wp->sx, ey = wp->yoff + wp->sy;
118
119 /* Inside pane. */
120 if (px >= wp->xoff && px < ex && py >= wp->yoff && py < ey)
121 return (SCREEN_REDRAW_INSIDE);
122
123 /* Get pane indicator. */
124 switch (options_get_number(oo, "pane-border-indicators")) {
125 case PANE_BORDER_COLOUR:
126 case PANE_BORDER_BOTH:
127 split = 1;
128 break;
129 }
130
131 /* Left/right borders. */
132 if (pane_status == PANE_STATUS_OFF) {
133 if (screen_redraw_two_panes(wp->window, 0) && split) {
134 if (wp->xoff == 0 && px == wp->sx && py <= wp->sy / 2)
135 return (SCREEN_REDRAW_BORDER_RIGHT);
136 if (wp->xoff != 0 &&
137 px == wp->xoff - 1 &&
138 py > wp->sy / 2)
139 return (SCREEN_REDRAW_BORDER_LEFT);
140 } else {
141 if ((wp->yoff == 0 || py >= wp->yoff - 1) && py <= ey) {
142 if (wp->xoff != 0 && px == wp->xoff - 1)
143 return (SCREEN_REDRAW_BORDER_LEFT);
144 if (px == ex)
145 return (SCREEN_REDRAW_BORDER_RIGHT);
146 }
147 }
148 } else {
149 if ((wp->yoff == 0 || py >= wp->yoff - 1) && py <= ey) {
150 if (wp->xoff != 0 && px == wp->xoff - 1)
151 return (SCREEN_REDRAW_BORDER_LEFT);
152 if (px == ex)
153 return (SCREEN_REDRAW_BORDER_RIGHT);
154 }
155 }
156
157 /* Top/bottom borders. */
158 if (pane_status == PANE_STATUS_OFF) {
159 if (screen_redraw_two_panes(wp->window, 1) && split) {
160 if (wp->yoff == 0 && py == wp->sy && px <= wp->sx / 2)
161 return (SCREEN_REDRAW_BORDER_BOTTOM);
162 if (wp->yoff != 0 &&
163 py == wp->yoff - 1 &&
164 px > wp->sx / 2)
165 return (SCREEN_REDRAW_BORDER_TOP);
166 } else {
167 if ((wp->xoff == 0 || px >= wp->xoff - 1) && px <= ex) {
168 if (wp->yoff != 0 && py == wp->yoff - 1)
169 return (SCREEN_REDRAW_BORDER_TOP);
170 if (py == ey)
171 return (SCREEN_REDRAW_BORDER_BOTTOM);
172 }
173 }
174 } else if (pane_status == PANE_STATUS_TOP) {
175 if ((wp->xoff == 0 || px >= wp->xoff - 1) && px <= ex) {
176 if (wp->yoff != 0 && py == wp->yoff - 1)
177 return (SCREEN_REDRAW_BORDER_TOP);
178 }
179 } else {
180 if ((wp->xoff == 0 || px >= wp->xoff - 1) && px <= ex) {
181 if (py == ey)
182 return (SCREEN_REDRAW_BORDER_BOTTOM);
183 }
184 }
185
186 /* Outside pane. */
187 return (SCREEN_REDRAW_OUTSIDE);
188 }
189
190 /* Check if a cell is on a border. */
191 static int
192 screen_redraw_cell_border(struct client *c, u_int px, u_int py, int pane_status)
193 {
194 struct window *w = c->session->curw->window;
195 struct window_pane *wp;
196
197 /* Outside the window? */
198 if (px > w->sx || py > w->sy)
199 return (0);
200
201 /* On the window border? */
202 if (px == w->sx || py == w->sy)
203 return (1);
204
205 /* Check all the panes. */
206 TAILQ_FOREACH(wp, &w->panes, entry) {
207 if (!window_pane_visible(wp))
208 continue;
209 switch (screen_redraw_pane_border(wp, px, py, pane_status)) {
210 case SCREEN_REDRAW_INSIDE:
211 return (0);
212 case SCREEN_REDRAW_OUTSIDE:
213 break;
214 default:
215 return (1);
216 }
217 }
218
219 return (0);
220 }
221
222 /* Work out type of border cell from surrounding cells. */
223 static int
224 screen_redraw_type_of_cell(struct client *c, u_int px, u_int py,
225 int pane_status)
226 {
227 struct window *w = c->session->curw->window;
228 u_int sx = w->sx, sy = w->sy;
229 int borders = 0;
230
231 /* Is this outside the window? */
232 if (px > sx || py > sy)
233 return (CELL_OUTSIDE);
234
235 /*
236 * Construct a bitmask of whether the cells to the left (bit 4), right,
237 * top, and bottom (bit 1) of this cell are borders.
238 */
239 if (px == 0 || screen_redraw_cell_border(c, px - 1, py, pane_status))
240 borders |= 8;
241 if (px <= sx && screen_redraw_cell_border(c, px + 1, py, pane_status))
242 borders |= 4;
243 if (pane_status == PANE_STATUS_TOP) {
244 if (py != 0 &&
245 screen_redraw_cell_border(c, px, py - 1, pane_status))
246 borders |= 2;
247 if (screen_redraw_cell_border(c, px, py + 1, pane_status))
248 borders |= 1;
249 } else if (pane_status == PANE_STATUS_BOTTOM) {
250 if (py == 0 ||
251 screen_redraw_cell_border(c, px, py - 1, pane_status))
252 borders |= 2;
253 if (py != sy - 1 &&
254 screen_redraw_cell_border(c, px, py + 1, pane_status))
255 borders |= 1;
256 } else {
257 if (py == 0 ||
258 screen_redraw_cell_border(c, px, py - 1, pane_status))
259 borders |= 2;
260 if (screen_redraw_cell_border(c, px, py + 1, pane_status))
261 borders |= 1;
262 }
263
264 /*
265 * Figure out what kind of border this cell is. Only one bit set
266 * doesn't make sense (can't have a border cell with no others
267 * connected).
268 */
269 switch (borders) {
270 case 15: /* 1111, left right top bottom */
271 return (CELL_JOIN);
272 case 14: /* 1110, left right top */
273 return (CELL_BOTTOMJOIN);
274 case 13: /* 1101, left right bottom */
275 return (CELL_TOPJOIN);
276 case 12: /* 1100, left right */
277 return (CELL_LEFTRIGHT);
278 case 11: /* 1011, left top bottom */
279 return (CELL_RIGHTJOIN);
280 case 10: /* 1010, left top */
281 return (CELL_BOTTOMRIGHT);
282 case 9: /* 1001, left bottom */
283 return (CELL_TOPRIGHT);
284 case 7: /* 0111, right top bottom */
285 return (CELL_LEFTJOIN);
286 case 6: /* 0110, right top */
287 return (CELL_BOTTOMLEFT);
288 case 5: /* 0101, right bottom */
289 return (CELL_TOPLEFT);
290 case 3: /* 0011, top bottom */
291 return (CELL_TOPBOTTOM);
292 }
293 return (CELL_OUTSIDE);
294 }
295
296 /* Check if cell inside a pane. */
297 static int
298 screen_redraw_check_cell(struct client *c, u_int px, u_int py, int pane_status,
299 struct window_pane **wpp)
300 {
301 struct window *w = c->session->curw->window;
302 struct window_pane *wp, *active;
303 int border;
304 u_int right, line;
305
306 *wpp = NULL;
307
308 if (px > w->sx || py > w->sy)
309 return (CELL_OUTSIDE);
310 if (px == w->sx || py == w->sy) /* window border */
311 return (screen_redraw_type_of_cell(c, px, py, pane_status));
312
313 if (pane_status != PANE_STATUS_OFF) {
314 active = wp = server_client_get_pane(c);
315 do {
316 if (!window_pane_visible(wp))
317 goto next1;
318
319 if (pane_status == PANE_STATUS_TOP)
320 line = wp->yoff - 1;
321 else
322 line = wp->yoff + wp->sy;
323 right = wp->xoff + 2 + wp->status_size - 1;
324
325 if (py == line && px >= wp->xoff + 2 && px <= right)
326 return (CELL_INSIDE);
327
328 next1:
329 wp = TAILQ_NEXT(wp, entry);
330 if (wp == NULL)
331 wp = TAILQ_FIRST(&w->panes);
332 } while (wp != active);
333 }
334
335 active = wp = server_client_get_pane(c);
336 do {
337 if (!window_pane_visible(wp))
338 goto next2;
339 *wpp = wp;
340
341 /*
342 * If definitely inside, return. If not on border, skip.
343 * Otherwise work out the cell.
344 */
345 border = screen_redraw_pane_border(wp, px, py, pane_status);
346 if (border == SCREEN_REDRAW_INSIDE)
347 return (CELL_INSIDE);
348 if (border == SCREEN_REDRAW_OUTSIDE)
349 goto next2;
350 return (screen_redraw_type_of_cell(c, px, py, pane_status));
351
352 next2:
353 wp = TAILQ_NEXT(wp, entry);
354 if (wp == NULL)
355 wp = TAILQ_FIRST(&w->panes);
356 } while (wp != active);
357
358 return (CELL_OUTSIDE);
359 }
360
361 /* Check if the border of a particular pane. */
362 static int
363 screen_redraw_check_is(u_int px, u_int py, int pane_status,
364 struct window_pane *wp)
365 {
366 enum screen_redraw_border_type border;
367
368 border = screen_redraw_pane_border(wp, px, py, pane_status);
369 if (border != SCREEN_REDRAW_INSIDE && border != SCREEN_REDRAW_OUTSIDE)
370 return (1);
371 return (0);
372 }
373
374 /* Update pane status. */
375 static int
376 screen_redraw_make_pane_status(struct client *c, struct window_pane *wp,
377 struct screen_redraw_ctx *rctx, enum pane_lines pane_lines)
378 {
379 struct window *w = wp->window;
380 struct grid_cell gc;
381 const char *fmt;
382 struct format_tree *ft;
383 char *expanded;
384 int pane_status = rctx->pane_status;
385 u_int width, i, cell_type, px, py;
386 struct screen_write_ctx ctx;
387 struct screen old;
388
389 ft = format_create(c, NULL, FORMAT_PANE|wp->id, FORMAT_STATUS);
390 format_defaults(ft, c, c->session, c->session->curw, wp);
391
392 if (wp == server_client_get_pane(c))
393 style_apply(&gc, w->options, "pane-active-border-style", ft);
394 else
395 style_apply(&gc, w->options, "pane-border-style", ft);
396 fmt = options_get_string(wp->options, "pane-border-format");
397
398 expanded = format_expand_time(ft, fmt);
399 if (wp->sx < 4)
400 wp->status_size = width = 0;
401 else
402 wp->status_size = width = wp->sx - 4;
403
404 memcpy(&old, &wp->status_screen, sizeof old);
405 screen_init(&wp->status_screen, width, 1, 0);
406 wp->status_screen.mode = 0;
407
408 screen_write_start(&ctx, &wp->status_screen);
409
410 for (i = 0; i < width; i++) {
411 px = wp->xoff + 2 + i;
412 if (rctx->pane_status == PANE_STATUS_TOP)
413 py = wp->yoff - 1;
414 else
415 py = wp->yoff + wp->sy;
416 cell_type = screen_redraw_type_of_cell(c, px, py, pane_status);
417 screen_redraw_border_set(w, wp, pane_lines, cell_type, &gc);
418 screen_write_cell(&ctx, &gc);
419 }
420 gc.attr &= ~GRID_ATTR_CHARSET;
421
422 screen_write_cursormove(&ctx, 0, 0, 0);
423 format_draw(&ctx, &gc, width, expanded, NULL, 0);
424 screen_write_stop(&ctx);
425
426 free(expanded);
427 format_free(ft);
428
429 if (grid_compare(wp->status_screen.grid, old.grid) == 0) {
430 screen_free(&old);
431 return (0);
432 }
433 screen_free(&old);
434 return (1);
435 }
436
437 /* Draw pane status. */
438 static void
439 screen_redraw_draw_pane_status(struct screen_redraw_ctx *ctx)
440 {
441 struct client *c = ctx->c;
442 struct window *w = c->session->curw->window;
443 struct tty *tty = &c->tty;
444 struct window_pane *wp;
445 struct screen *s;
446 u_int i, x, width, xoff, yoff, size;
447
448 log_debug("%s: %s @%u", __func__, c->name, w->id);
449
450 TAILQ_FOREACH(wp, &w->panes, entry) {
451 if (!window_pane_visible(wp))
452 continue;
453 s = &wp->status_screen;
454
455 size = wp->status_size;
456 if (ctx->pane_status == PANE_STATUS_TOP)
457 yoff = wp->yoff - 1;
458 else
459 yoff = wp->yoff + wp->sy;
460 xoff = wp->xoff + 2;
461
462 if (xoff + size <= ctx->ox ||
463 xoff >= ctx->ox + ctx->sx ||
464 yoff < ctx->oy ||
465 yoff >= ctx->oy + ctx->sy)
466 continue;
467
468 if (xoff >= ctx->ox && xoff + size <= ctx->ox + ctx->sx) {
469 /* All visible. */
470 i = 0;
471 x = xoff - ctx->ox;
472 width = size;
473 } else if (xoff < ctx->ox && xoff + size > ctx->ox + ctx->sx) {
474 /* Both left and right not visible. */
475 i = ctx->ox;
476 x = 0;
477 width = ctx->sx;
478 } else if (xoff < ctx->ox) {
479 /* Left not visible. */
480 i = ctx->ox - xoff;
481 x = 0;
482 width = size - i;
483 } else {
484 /* Right not visible. */
485 i = 0;
486 x = xoff - ctx->ox;
487 width = size - x;
488 }
489
490 if (ctx->statustop)
491 yoff += ctx->statuslines;
492 tty_draw_line(tty, s, i, 0, width, x, yoff - ctx->oy,
493 &grid_default_cell, NULL);
494 }
495 tty_cursor(tty, 0, 0);
496 }
497
498 /* Update status line and change flags if unchanged. */
499 static int
500 screen_redraw_update(struct client *c, int flags)
501 {
502 struct window *w = c->session->curw->window;
503 struct window_pane *wp;
504 struct options *wo = w->options;
505 int redraw;
506 enum pane_lines lines;
507 struct screen_redraw_ctx ctx;
508
509 if (c->message_string != NULL)
510 redraw = status_message_redraw(c);
511 else if (c->prompt_string != NULL)
512 redraw = status_prompt_redraw(c);
513 else
514 redraw = status_redraw(c);
515 if (!redraw && (~flags & CLIENT_REDRAWSTATUSALWAYS))
516 flags &= ~CLIENT_REDRAWSTATUS;
517
518 if (c->overlay_draw != NULL)
519 flags |= CLIENT_REDRAWOVERLAY;
520
521 if (options_get_number(wo, "pane-border-status") != PANE_STATUS_OFF) {
522 screen_redraw_set_context(c, &ctx);
523 lines = options_get_number(wo, "pane-border-lines");
524 redraw = 0;
525 TAILQ_FOREACH(wp, &w->panes, entry) {
526 if (screen_redraw_make_pane_status(c, wp, &ctx, lines))
527 redraw = 1;
528 }
529 if (redraw)
530 flags |= CLIENT_REDRAWBORDERS;
531 }
532 return (flags);
533 }
534
535 /* Set up redraw context. */
536 static void
537 screen_redraw_set_context(struct client *c, struct screen_redraw_ctx *ctx)
538 {
539 struct session *s = c->session;
540 struct options *oo = s->options;
541 struct window *w = s->curw->window;
542 struct options *wo = w->options;
543 u_int lines;
544
545 memset(ctx, 0, sizeof *ctx);
546 ctx->c = c;
547
548 lines = status_line_size(c);
549 if (c->message_string != NULL || c->prompt_string != NULL)
550 lines = (lines == 0) ? 1 : lines;
551 if (lines != 0 && options_get_number(oo, "status-position") == 0)
552 ctx->statustop = 1;
553 ctx->statuslines = lines;
554
555 ctx->pane_status = options_get_number(wo, "pane-border-status");
556 ctx->pane_lines = options_get_number(wo, "pane-border-lines");
557
558 tty_window_offset(&c->tty, &ctx->ox, &ctx->oy, &ctx->sx, &ctx->sy);
559
560 log_debug("%s: %s @%u ox=%u oy=%u sx=%u sy=%u %u/%d", __func__, c->name,
561 w->id, ctx->ox, ctx->oy, ctx->sx, ctx->sy, ctx->statuslines,
562 ctx->statustop);
563 }
564
565 /* Redraw entire screen. */
566 void
567 screen_redraw_screen(struct client *c)
568 {
569 struct screen_redraw_ctx ctx;
570 int flags;
571
572 if (c->flags & CLIENT_SUSPENDED)
573 return;
574
575 flags = screen_redraw_update(c, c->flags);
576 if ((flags & CLIENT_ALLREDRAWFLAGS) == 0)
577 return;
578
579 screen_redraw_set_context(c, &ctx);
580 tty_sync_start(&c->tty);
581 tty_update_mode(&c->tty, c->tty.mode, NULL);
582
583 if (flags & (CLIENT_REDRAWWINDOW|CLIENT_REDRAWBORDERS)) {
584 log_debug("%s: redrawing borders", c->name);
585 if (ctx.pane_status != PANE_STATUS_OFF)
586 screen_redraw_draw_pane_status(&ctx);
587 screen_redraw_draw_borders(&ctx);
588 }
589 if (flags & CLIENT_REDRAWWINDOW) {
590 log_debug("%s: redrawing panes", c->name);
591 screen_redraw_draw_panes(&ctx);
592 }
593 if (ctx.statuslines != 0 &&
594 (flags & (CLIENT_REDRAWSTATUS|CLIENT_REDRAWSTATUSALWAYS))) {
595 log_debug("%s: redrawing status", c->name);
596 screen_redraw_draw_status(&ctx);
597 }
598 if (c->overlay_draw != NULL && (flags & CLIENT_REDRAWOVERLAY)) {
599 log_debug("%s: redrawing overlay", c->name);
600 c->overlay_draw(c, c->overlay_data, &ctx);
601 }
602
603 tty_reset(&c->tty);
604 }
605
606 /* Redraw a single pane. */
607 void
608 screen_redraw_pane(struct client *c, struct window_pane *wp)
609 {
610 struct screen_redraw_ctx ctx;
611
612 if (!window_pane_visible(wp))
613 return;
614
615 screen_redraw_set_context(c, &ctx);
616 tty_sync_start(&c->tty);
617 tty_update_mode(&c->tty, c->tty.mode, NULL);
618
619 screen_redraw_draw_pane(&ctx, wp);
620
621 tty_reset(&c->tty);
622 }
623
624 /* Get border cell style. */
625 static const struct grid_cell *
626 screen_redraw_draw_borders_style(struct screen_redraw_ctx *ctx, u_int x,
627 u_int y, struct window_pane *wp)
628 {
629 struct client *c = ctx->c;
630 struct session *s = c->session;
631 struct window *w = s->curw->window;
632 struct window_pane *active = server_client_get_pane(c);
633 struct options *oo = w->options;
634 struct format_tree *ft;
635
636 if (wp->border_gc_set)
637 return (&wp->border_gc);
638 wp->border_gc_set = 1;
639
640 ft = format_create_defaults(NULL, c, s, s->curw, wp);
641 if (screen_redraw_check_is(x, y, ctx->pane_status, active))
642 style_apply(&wp->border_gc, oo, "pane-active-border-style", ft);
643 else
644 style_apply(&wp->border_gc, oo, "pane-border-style", ft);
645 format_free(ft);
646
647 return (&wp->border_gc);
648 }
649
650 /* Draw a border cell. */
651 static void
652 screen_redraw_draw_borders_cell(struct screen_redraw_ctx *ctx, u_int i, u_int j)
653 {
654 struct client *c = ctx->c;
655 struct session *s = c->session;
656 struct window *w = s->curw->window;
657 struct options *oo = w->options;
658 struct tty *tty = &c->tty;
659 struct format_tree *ft;
660 struct window_pane *wp, *active = server_client_get_pane(c);
661 struct grid_cell gc;
662 const struct grid_cell *tmp;
663 struct overlay_ranges r;
664 u_int cell_type, x = ctx->ox + i, y = ctx->oy + j;
665 int arrows = 0, border;
666 int pane_status = ctx->pane_status, isolates;
667
668 if (c->overlay_check != NULL) {
669 c->overlay_check(c, c->overlay_data, x, y, 1, &r);
670 if (r.nx[0] + r.nx[1] == 0)
671 return;
672 }
673
674 cell_type = screen_redraw_check_cell(c, x, y, pane_status, &wp);
675 if (cell_type == CELL_INSIDE)
676 return;
677
678 if (wp == NULL) {
679 if (!ctx->no_pane_gc_set) {
680 ft = format_create_defaults(NULL, c, s, s->curw, NULL);
681 memcpy(&ctx->no_pane_gc, &grid_default_cell, sizeof gc);
682 style_add(&ctx->no_pane_gc, oo, "pane-border-style",
683 ft);
684 format_free(ft);
685 ctx->no_pane_gc_set = 1;
686 }
687 memcpy(&gc, &ctx->no_pane_gc, sizeof gc);
688 } else {
689 tmp = screen_redraw_draw_borders_style(ctx, x, y, wp);
690 if (tmp == NULL)
691 return;
692 memcpy(&gc, tmp, sizeof gc);
693
694 if (server_is_marked(s, s->curw, marked_pane.wp) &&
695 screen_redraw_check_is(x, y, pane_status, marked_pane.wp))
696 gc.attr ^= GRID_ATTR_REVERSE;
697 }
698 screen_redraw_border_set(w, wp, ctx->pane_lines, cell_type, &gc);
699
700 if (cell_type == CELL_TOPBOTTOM &&
701 (c->flags & CLIENT_UTF8) &&
702 tty_term_has(tty->term, TTYC_BIDI))
703 isolates = 1;
704 else
705 isolates = 0;
706
707 if (ctx->statustop)
708 tty_cursor(tty, i, ctx->statuslines + j);
709 else
710 tty_cursor(tty, i, j);
711 if (isolates)
712 tty_puts(tty, END_ISOLATE);
713
714 switch (options_get_number(oo, "pane-border-indicators")) {
715 case PANE_BORDER_ARROWS:
716 case PANE_BORDER_BOTH:
717 arrows = 1;
718 break;
719 }
720
721 if (wp != NULL && arrows) {
722 border = screen_redraw_pane_border(active, x, y, pane_status);
723 if (((i == wp->xoff + 1 &&
724 (cell_type == CELL_LEFTRIGHT ||
725 (cell_type == CELL_TOPJOIN &&
726 border == SCREEN_REDRAW_BORDER_BOTTOM) ||
727 (cell_type == CELL_BOTTOMJOIN &&
728 border == SCREEN_REDRAW_BORDER_TOP))) ||
729 (j == wp->yoff + 1 &&
730 (cell_type == CELL_TOPBOTTOM ||
731 (cell_type == CELL_LEFTJOIN &&
732 border == SCREEN_REDRAW_BORDER_RIGHT) ||
733 (cell_type == CELL_RIGHTJOIN &&
734 border == SCREEN_REDRAW_BORDER_LEFT)))) &&
735 screen_redraw_check_is(x, y, pane_status, active)) {
736 gc.attr |= GRID_ATTR_CHARSET;
737 utf8_set(&gc.data, BORDER_MARKERS[border]);
738 }
739 }
740
741 tty_cell(tty, &gc, &grid_default_cell, NULL);
742 if (isolates)
743 tty_puts(tty, START_ISOLATE);
744 }
745
746 /* Draw the borders. */
747 static void
748 screen_redraw_draw_borders(struct screen_redraw_ctx *ctx)
749 {
750 struct client *c = ctx->c;
751 struct session *s = c->session;
752 struct window *w = s->curw->window;
753 struct window_pane *wp;
754 u_int i, j;
755
756 log_debug("%s: %s @%u", __func__, c->name, w->id);
757
758 TAILQ_FOREACH(wp, &w->panes, entry)
759 wp->border_gc_set = 0;
760
761 for (j = 0; j < c->tty.sy - ctx->statuslines; j++) {
762 for (i = 0; i < c->tty.sx; i++)
763 screen_redraw_draw_borders_cell(ctx, i, j);
764 }
765 }
766
767 /* Draw the panes. */
768 static void
769 screen_redraw_draw_panes(struct screen_redraw_ctx *ctx)
770 {
771 struct client *c = ctx->c;
772 struct window *w = c->session->curw->window;
773 struct window_pane *wp;
774
775 log_debug("%s: %s @%u", __func__, c->name, w->id);
776
777 TAILQ_FOREACH(wp, &w->panes, entry) {
778 if (window_pane_visible(wp))
779 screen_redraw_draw_pane(ctx, wp);
780 }
781 }
782
783 /* Draw the status line. */
784 static void
785 screen_redraw_draw_status(struct screen_redraw_ctx *ctx)
786 {
787 struct client *c = ctx->c;
788 struct window *w = c->session->curw->window;
789 struct tty *tty = &c->tty;
790 struct screen *s = c->status.active;
791 u_int i, y;
792
793 log_debug("%s: %s @%u", __func__, c->name, w->id);
794
795 if (ctx->statustop)
796 y = 0;
797 else
798 y = c->tty.sy - ctx->statuslines;
799 for (i = 0; i < ctx->statuslines; i++) {
800 tty_draw_line(tty, s, 0, i, UINT_MAX, 0, y + i,
801 &grid_default_cell, NULL);
802 }
803 }
804
805 /* Draw one pane. */
806 static void
807 screen_redraw_draw_pane(struct screen_redraw_ctx *ctx, struct window_pane *wp)
808 {
809 struct client *c = ctx->c;
810 struct window *w = c->session->curw->window;
811 struct tty *tty = &c->tty;
812 struct screen *s = wp->screen;
813 struct colour_palette *palette = &wp->palette;
814 struct grid_cell defaults;
815 u_int i, j, top, x, y, width;
816
817 log_debug("%s: %s @%u %%%u", __func__, c->name, w->id, wp->id);
818
819 if (wp->xoff + wp->sx <= ctx->ox || wp->xoff >= ctx->ox + ctx->sx)
820 return;
821 if (ctx->statustop)
822 top = ctx->statuslines;
823 else
824 top = 0;
825 for (j = 0; j < wp->sy; j++) {
826 if (wp->yoff + j < ctx->oy || wp->yoff + j >= ctx->oy + ctx->sy)
827 continue;
828 y = top + wp->yoff + j - ctx->oy;
829
830 if (wp->xoff >= ctx->ox &&
831 wp->xoff + wp->sx <= ctx->ox + ctx->sx) {
832 /* All visible. */
833 i = 0;
834 x = wp->xoff - ctx->ox;
835 width = wp->sx;
836 } else if (wp->xoff < ctx->ox &&
837 wp->xoff + wp->sx > ctx->ox + ctx->sx) {
838 /* Both left and right not visible. */
839 i = ctx->ox;
840 x = 0;
841 width = ctx->sx;
842 } else if (wp->xoff < ctx->ox) {
843 /* Left not visible. */
844 i = ctx->ox - wp->xoff;
845 x = 0;
846 width = wp->sx - i;
847 } else {
848 /* Right not visible. */
849 i = 0;
850 x = wp->xoff - ctx->ox;
851 width = ctx->sx - x;
852 }
853 log_debug("%s: %s %%%u line %u,%u at %u,%u, width %u",
854 __func__, c->name, wp->id, i, j, x, y, width);
855
856 tty_default_colours(&defaults, wp);
857 tty_draw_line(tty, s, i, j, width, x, y, &defaults, palette);
858 }
859 }
tmux -- terminal multiplexer similar to GNU Screen