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1.1 misho 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_write_initctx(struct screen_write_ctx *,
27: struct tty_ctx *);
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 *);
31: static void screen_write_collect_flush(struct screen_write_ctx *, int);
32:
33: static int screen_write_overwrite(struct screen_write_ctx *,
34: struct grid_cell *, u_int);
35: static const struct grid_cell *screen_write_combine(struct screen_write_ctx *,
36: const struct utf8_data *, u_int *);
37:
38: static const struct grid_cell screen_write_pad_cell = {
39: GRID_FLAG_PADDING, 0, 8, 8, { { 0 }, 0, 0, 0 }
40: };
41:
42: struct screen_write_collect_item {
43: u_int x;
44:
45: u_int used;
46: char data[256];
47:
48: struct grid_cell gc;
49:
50: TAILQ_ENTRY (screen_write_collect_item) entry;
51: };
52: struct screen_write_collect_line {
53: TAILQ_HEAD(, screen_write_collect_item) items;
54: };
55:
56: /* Initialize writing with a window. */
57: void
58: screen_write_start(struct screen_write_ctx *ctx, struct window_pane *wp,
59: struct screen *s)
60: {
61: char tmp[16];
62: u_int y;
63:
64: memset(ctx, 0, sizeof *ctx);
65:
66: ctx->wp = wp;
67: if (wp != NULL && s == NULL)
68: ctx->s = wp->screen;
69: else
70: ctx->s = s;
71:
72: ctx->list = xcalloc(screen_size_y(ctx->s), sizeof *ctx->list);
73: for (y = 0; y < screen_size_y(ctx->s); y++)
74: TAILQ_INIT(&ctx->list[y].items);
75: ctx->item = xcalloc(1, sizeof *ctx->item);
76:
77: if (wp != NULL)
78: snprintf(tmp, sizeof tmp, "pane %%%u", wp->id);
79: log_debug("%s: size %ux%u, %s", __func__, screen_size_x(ctx->s),
80: screen_size_y(ctx->s), wp == NULL ? "no pane" : tmp);
81: }
82:
83: /* Finish writing. */
84: void
85: screen_write_stop(struct screen_write_ctx *ctx)
86: {
87: screen_write_collect_end(ctx);
88: screen_write_collect_flush(ctx, 0);
89:
90: log_debug("%s: %u cells (%u written, %u skipped)", __func__,
91: ctx->cells, ctx->written, ctx->skipped);
92:
93: free(ctx->item);
94: free(ctx->list); /* flush will have emptied */
95: }
96:
97: /* Reset screen state. */
98: void
99: screen_write_reset(struct screen_write_ctx *ctx)
100: {
101: struct screen *s = ctx->s;
102:
103: screen_reset_tabs(s);
104: screen_write_scrollregion(ctx, 0, screen_size_y(s) - 1);
105:
106: s->mode &= ~(MODE_INSERT|MODE_KCURSOR|MODE_KKEYPAD|MODE_FOCUSON);
107: s->mode &= ~(ALL_MOUSE_MODES|MODE_MOUSE_UTF8|MODE_MOUSE_SGR);
108:
109: screen_write_clearscreen(ctx, 8);
110: screen_write_cursormove(ctx, 0, 0);
111: }
112:
113: /* Write character. */
114: void
115: screen_write_putc(struct screen_write_ctx *ctx, const struct grid_cell *gcp,
116: u_char ch)
117: {
118: struct grid_cell gc;
119:
120: memcpy(&gc, gcp, sizeof gc);
121:
122: utf8_set(&gc.data, ch);
123: screen_write_cell(ctx, &gc);
124: }
125:
126: /* Calculate string length, with embedded formatting. */
127: size_t
128: screen_write_cstrlen(const char *fmt, ...)
129: {
130: va_list ap;
131: char *msg, *msg2, *ptr, *ptr2;
132: size_t size;
133:
134: va_start(ap, fmt);
135: xvasprintf(&msg, fmt, ap);
136: va_end(ap);
137: msg2 = xmalloc(strlen(msg) + 1);
138:
139: ptr = msg;
140: ptr2 = msg2;
141: while (*ptr != '\0') {
142: if (ptr[0] == '#' && ptr[1] == '[') {
143: while (*ptr != ']' && *ptr != '\0')
144: ptr++;
145: if (*ptr == ']')
146: ptr++;
147: continue;
148: }
149: *ptr2++ = *ptr++;
150: }
151: *ptr2 = '\0';
152:
153: size = screen_write_strlen("%s", msg2);
154:
155: free(msg);
156: free(msg2);
157:
158: return (size);
159: }
160:
161: /* Calculate string length. */
162: size_t
163: screen_write_strlen(const char *fmt, ...)
164: {
165: va_list ap;
166: char *msg;
167: struct utf8_data ud;
168: u_char *ptr;
169: size_t left, size = 0;
170: enum utf8_state more;
171:
172: va_start(ap, fmt);
173: xvasprintf(&msg, fmt, ap);
174: va_end(ap);
175:
176: ptr = msg;
177: while (*ptr != '\0') {
178: if (*ptr > 0x7f && utf8_open(&ud, *ptr) == UTF8_MORE) {
179: ptr++;
180:
181: left = strlen(ptr);
182: if (left < (size_t)ud.size - 1)
183: break;
184: while ((more = utf8_append(&ud, *ptr)) == UTF8_MORE)
185: ptr++;
186: ptr++;
187:
188: if (more == UTF8_DONE)
189: size += ud.width;
190: } else {
191: if (*ptr > 0x1f && *ptr < 0x7f)
192: size++;
193: ptr++;
194: }
195: }
196:
197: free(msg);
198: return (size);
199: }
200:
201: /* Write simple string (no UTF-8 or maximum length). */
202: void
203: screen_write_puts(struct screen_write_ctx *ctx, const struct grid_cell *gcp,
204: const char *fmt, ...)
205: {
206: va_list ap;
207:
208: va_start(ap, fmt);
209: screen_write_vnputs(ctx, -1, gcp, fmt, ap);
210: va_end(ap);
211: }
212:
213: /* Write string with length limit (-1 for unlimited). */
214: void
215: screen_write_nputs(struct screen_write_ctx *ctx, ssize_t maxlen,
216: const struct grid_cell *gcp, const char *fmt, ...)
217: {
218: va_list ap;
219:
220: va_start(ap, fmt);
221: screen_write_vnputs(ctx, maxlen, gcp, fmt, ap);
222: va_end(ap);
223: }
224:
225: void
226: screen_write_vnputs(struct screen_write_ctx *ctx, ssize_t maxlen,
227: const struct grid_cell *gcp, const char *fmt, va_list ap)
228: {
229: struct grid_cell gc;
230: struct utf8_data *ud = &gc.data;
231: char *msg;
232: u_char *ptr;
233: size_t left, size = 0;
234: enum utf8_state more;
235:
236: memcpy(&gc, gcp, sizeof gc);
237: xvasprintf(&msg, fmt, ap);
238:
239: ptr = msg;
240: while (*ptr != '\0') {
241: if (*ptr > 0x7f && utf8_open(ud, *ptr) == UTF8_MORE) {
242: ptr++;
243:
244: left = strlen(ptr);
245: if (left < (size_t)ud->size - 1)
246: break;
247: while ((more = utf8_append(ud, *ptr)) == UTF8_MORE)
248: ptr++;
249: ptr++;
250:
251: if (more != UTF8_DONE)
252: continue;
253: if (maxlen > 0 && size + ud->width > (size_t)maxlen) {
254: while (size < (size_t)maxlen) {
255: screen_write_putc(ctx, &gc, ' ');
256: size++;
257: }
258: break;
259: }
260: size += ud->width;
261: screen_write_cell(ctx, &gc);
262: } else {
263: if (maxlen > 0 && size + 1 > (size_t)maxlen)
264: break;
265:
266: if (*ptr == '\001')
267: gc.attr ^= GRID_ATTR_CHARSET;
268: else if (*ptr > 0x1f && *ptr < 0x7f) {
269: size++;
270: screen_write_putc(ctx, &gc, *ptr);
271: }
272: ptr++;
273: }
274: }
275:
276: free(msg);
277: }
278:
279: /* Write string, similar to nputs, but with embedded formatting (#[]). */
280: void
281: screen_write_cnputs(struct screen_write_ctx *ctx, ssize_t maxlen,
282: const struct grid_cell *gcp, const char *fmt, ...)
283: {
284: struct grid_cell gc;
285: struct utf8_data *ud = &gc.data;
286: va_list ap;
287: char *msg;
288: u_char *ptr, *last;
289: size_t left, size = 0;
290: enum utf8_state more;
291:
292: memcpy(&gc, gcp, sizeof gc);
293:
294: va_start(ap, fmt);
295: xvasprintf(&msg, fmt, ap);
296: va_end(ap);
297:
298: ptr = msg;
299: while (*ptr != '\0') {
300: if (ptr[0] == '#' && ptr[1] == '[') {
301: ptr += 2;
302: last = ptr + strcspn(ptr, "]");
303: if (*last == '\0') {
304: /* No ]. Not much point in doing anything. */
305: break;
306: }
307: *last = '\0';
308:
309: style_parse(gcp, &gc, ptr);
310: ptr = last + 1;
311: continue;
312: }
313:
314: if (*ptr > 0x7f && utf8_open(ud, *ptr) == UTF8_MORE) {
315: ptr++;
316:
317: left = strlen(ptr);
318: if (left < (size_t)ud->size - 1)
319: break;
320: while ((more = utf8_append(ud, *ptr)) == UTF8_MORE)
321: ptr++;
322: ptr++;
323:
324: if (more != UTF8_DONE)
325: continue;
326: if (maxlen > 0 && size + ud->width > (size_t)maxlen) {
327: while (size < (size_t)maxlen) {
328: screen_write_putc(ctx, &gc, ' ');
329: size++;
330: }
331: break;
332: }
333: size += ud->width;
334: screen_write_cell(ctx, &gc);
335: } else {
336: if (maxlen > 0 && size + 1 > (size_t)maxlen)
337: break;
338:
339: if (*ptr > 0x1f && *ptr < 0x7f) {
340: size++;
341: screen_write_putc(ctx, &gc, *ptr);
342: }
343: ptr++;
344: }
345: }
346:
347: free(msg);
348: }
349:
350: /* Copy from another screen. */
351: void
352: screen_write_copy(struct screen_write_ctx *ctx, struct screen *src, u_int px,
353: u_int py, u_int nx, u_int ny, bitstr_t *markbs,
354: const struct grid_cell *markgc)
355: {
356: struct screen *s = ctx->s;
357: struct grid *gd = src->grid;
358: struct grid_cell gc;
359: u_int xx, yy, cx, cy, b;
360:
361: cx = s->cx;
362: cy = s->cy;
363:
364: for (yy = py; yy < py + ny; yy++) {
365: for (xx = px; xx < px + nx; xx++) {
366: grid_get_cell(gd, xx, yy, &gc);
367: if (markbs != NULL) {
368: b = (yy * screen_size_x(src)) + xx;
369: if (bit_test(markbs, b)) {
370: gc.attr = markgc->attr;
371: gc.fg = markgc->fg;
372: gc.bg = markgc->bg;
373: }
374: }
375: screen_write_cell(ctx, &gc);
376: }
377:
378: cy++;
379: screen_write_cursormove(ctx, cx, cy);
380: }
381: }
382:
383: /* Set up context for TTY command. */
384: static void
385: screen_write_initctx(struct screen_write_ctx *ctx, struct tty_ctx *ttyctx)
386: {
387: struct screen *s = ctx->s;
388:
389: ttyctx->wp = ctx->wp;
390:
391: ttyctx->ocx = s->cx;
392: ttyctx->ocy = s->cy;
393:
394: ttyctx->orlower = s->rlower;
395: ttyctx->orupper = s->rupper;
396: }
397:
398: /* Set a mode. */
399: void
400: screen_write_mode_set(struct screen_write_ctx *ctx, int mode)
401: {
402: struct screen *s = ctx->s;
403:
404: s->mode |= mode;
405: }
406:
407: /* Clear a mode. */
408: void
409: screen_write_mode_clear(struct screen_write_ctx *ctx, int mode)
410: {
411: struct screen *s = ctx->s;
412:
413: s->mode &= ~mode;
414: }
415:
416: /* Cursor up by ny. */
417: void
418: screen_write_cursorup(struct screen_write_ctx *ctx, u_int ny)
419: {
420: struct screen *s = ctx->s;
421:
422: if (ny == 0)
423: ny = 1;
424:
425: if (s->cy < s->rupper) {
426: /* Above region. */
427: if (ny > s->cy)
428: ny = s->cy;
429: } else {
430: /* Below region. */
431: if (ny > s->cy - s->rupper)
432: ny = s->cy - s->rupper;
433: }
434: if (s->cx == screen_size_x(s))
435: s->cx--;
436: if (ny == 0)
437: return;
438:
439: s->cy -= ny;
440: }
441:
442: /* Cursor down by ny. */
443: void
444: screen_write_cursordown(struct screen_write_ctx *ctx, u_int ny)
445: {
446: struct screen *s = ctx->s;
447:
448: if (ny == 0)
449: ny = 1;
450:
451: if (s->cy > s->rlower) {
452: /* Below region. */
453: if (ny > screen_size_y(s) - 1 - s->cy)
454: ny = screen_size_y(s) - 1 - s->cy;
455: } else {
456: /* Above region. */
457: if (ny > s->rlower - s->cy)
458: ny = s->rlower - s->cy;
459: }
460: if (s->cx == screen_size_x(s))
461: s->cx--;
462: if (ny == 0)
463: return;
464:
465: s->cy += ny;
466: }
467:
468: /* Cursor right by nx. */
469: void
470: screen_write_cursorright(struct screen_write_ctx *ctx, u_int nx)
471: {
472: struct screen *s = ctx->s;
473:
474: if (nx == 0)
475: nx = 1;
476:
477: if (nx > screen_size_x(s) - 1 - s->cx)
478: nx = screen_size_x(s) - 1 - s->cx;
479: if (nx == 0)
480: return;
481:
482: s->cx += nx;
483: }
484:
485: /* Cursor left by nx. */
486: void
487: screen_write_cursorleft(struct screen_write_ctx *ctx, u_int nx)
488: {
489: struct screen *s = ctx->s;
490:
491: if (nx == 0)
492: nx = 1;
493:
494: if (nx > s->cx)
495: nx = s->cx;
496: if (nx == 0)
497: return;
498:
499: s->cx -= nx;
500: }
501:
502: /* Backspace; cursor left unless at start of wrapped line when can move up. */
503: void
504: screen_write_backspace(struct screen_write_ctx *ctx)
505: {
506: struct screen *s = ctx->s;
507: struct grid_line *gl;
508:
509: if (s->cx == 0) {
510: if (s->cy == 0)
511: return;
512: gl = &s->grid->linedata[s->grid->hsize + s->cy - 1];
513: if (gl->flags & GRID_LINE_WRAPPED) {
514: s->cy--;
515: s->cx = screen_size_x(s) - 1;
516: }
517: } else
518: s->cx--;
519: }
520:
521: /* VT100 alignment test. */
522: void
523: screen_write_alignmenttest(struct screen_write_ctx *ctx)
524: {
525: struct screen *s = ctx->s;
526: struct tty_ctx ttyctx;
527: struct grid_cell gc;
528: u_int xx, yy;
529:
530: screen_write_initctx(ctx, &ttyctx);
531:
532: memcpy(&gc, &grid_default_cell, sizeof gc);
533: utf8_set(&gc.data, 'E');
534:
535: for (yy = 0; yy < screen_size_y(s); yy++) {
536: for (xx = 0; xx < screen_size_x(s); xx++)
537: grid_view_set_cell(s->grid, xx, yy, &gc);
538: }
539:
540: s->cx = 0;
541: s->cy = 0;
542:
543: s->rupper = 0;
544: s->rlower = screen_size_y(s) - 1;
545:
546: screen_write_collect_clear(ctx, 0, screen_size_y(s) - 1);
547: tty_write(tty_cmd_alignmenttest, &ttyctx);
548: }
549:
550: /* Insert nx characters. */
551: void
552: screen_write_insertcharacter(struct screen_write_ctx *ctx, u_int nx, u_int bg)
553: {
554: struct screen *s = ctx->s;
555: struct tty_ctx ttyctx;
556:
557: if (nx == 0)
558: nx = 1;
559:
560: if (nx > screen_size_x(s) - s->cx)
561: nx = screen_size_x(s) - s->cx;
562: if (nx == 0)
563: return;
564:
565: if (s->cx > screen_size_x(s) - 1)
566: return;
567:
568: screen_write_initctx(ctx, &ttyctx);
569: ttyctx.bg = bg;
570:
571: grid_view_insert_cells(s->grid, s->cx, s->cy, nx, bg);
572:
573: screen_write_collect_flush(ctx, 0);
574: ttyctx.num = nx;
575: tty_write(tty_cmd_insertcharacter, &ttyctx);
576: }
577:
578: /* Delete nx characters. */
579: void
580: screen_write_deletecharacter(struct screen_write_ctx *ctx, u_int nx, u_int bg)
581: {
582: struct screen *s = ctx->s;
583: struct tty_ctx ttyctx;
584:
585: if (nx == 0)
586: nx = 1;
587:
588: if (nx > screen_size_x(s) - s->cx)
589: nx = screen_size_x(s) - s->cx;
590: if (nx == 0)
591: return;
592:
593: if (s->cx > screen_size_x(s) - 1)
594: return;
595:
596: screen_write_initctx(ctx, &ttyctx);
597: ttyctx.bg = bg;
598:
599: grid_view_delete_cells(s->grid, s->cx, s->cy, nx, bg);
600:
601: screen_write_collect_flush(ctx, 0);
602: ttyctx.num = nx;
603: tty_write(tty_cmd_deletecharacter, &ttyctx);
604: }
605:
606: /* Clear nx characters. */
607: void
608: screen_write_clearcharacter(struct screen_write_ctx *ctx, u_int nx)
609: {
610: struct screen *s = ctx->s;
611: struct tty_ctx ttyctx;
612:
613: if (nx == 0)
614: nx = 1;
615:
616: if (nx > screen_size_x(s) - s->cx)
617: nx = screen_size_x(s) - s->cx;
618: if (nx == 0)
619: return;
620:
621: if (s->cx > screen_size_x(s) - 1)
622: return;
623:
624: screen_write_initctx(ctx, &ttyctx);
625:
626: grid_view_clear(s->grid, s->cx, s->cy, nx, 1, 8);
627:
628: screen_write_collect_flush(ctx, 0);
629: ttyctx.num = nx;
630: tty_write(tty_cmd_clearcharacter, &ttyctx);
631: }
632:
633: /* Insert ny lines. */
634: void
635: screen_write_insertline(struct screen_write_ctx *ctx, u_int ny, u_int bg)
636: {
637: struct screen *s = ctx->s;
638: struct grid *gd = s->grid;
639: struct tty_ctx ttyctx;
640:
641: if (ny == 0)
642: ny = 1;
643:
644: if (s->cy < s->rupper || s->cy > s->rlower) {
645: if (ny > screen_size_y(s) - s->cy)
646: ny = screen_size_y(s) - s->cy;
647: if (ny == 0)
648: return;
649:
650: screen_write_initctx(ctx, &ttyctx);
651: ttyctx.bg = bg;
652:
653: grid_view_insert_lines(gd, s->cy, ny, bg);
654:
655: screen_write_collect_flush(ctx, 0);
656: ttyctx.num = ny;
657: tty_write(tty_cmd_insertline, &ttyctx);
658: return;
659: }
660:
661: if (ny > s->rlower + 1 - s->cy)
662: ny = s->rlower + 1 - s->cy;
663: if (ny == 0)
664: return;
665:
666: screen_write_initctx(ctx, &ttyctx);
667: ttyctx.bg = bg;
668:
669: if (s->cy < s->rupper || s->cy > s->rlower)
670: grid_view_insert_lines(gd, s->cy, ny, bg);
671: else
672: grid_view_insert_lines_region(gd, s->rlower, s->cy, ny, bg);
673:
674: screen_write_collect_flush(ctx, 0);
675: ttyctx.num = ny;
676: tty_write(tty_cmd_insertline, &ttyctx);
677: }
678:
679: /* Delete ny lines. */
680: void
681: screen_write_deleteline(struct screen_write_ctx *ctx, u_int ny, u_int bg)
682: {
683: struct screen *s = ctx->s;
684: struct grid *gd = s->grid;
685: struct tty_ctx ttyctx;
686:
687: if (ny == 0)
688: ny = 1;
689:
690: if (s->cy < s->rupper || s->cy > s->rlower) {
691: if (ny > screen_size_y(s) - s->cy)
692: ny = screen_size_y(s) - s->cy;
693: if (ny == 0)
694: return;
695:
696: screen_write_initctx(ctx, &ttyctx);
697: ttyctx.bg = bg;
698:
699: grid_view_delete_lines(gd, s->cy, ny, bg);
700:
701: screen_write_collect_flush(ctx, 0);
702: ttyctx.num = ny;
703: tty_write(tty_cmd_deleteline, &ttyctx);
704: return;
705: }
706:
707: if (ny > s->rlower + 1 - s->cy)
708: ny = s->rlower + 1 - s->cy;
709: if (ny == 0)
710: return;
711:
712: screen_write_initctx(ctx, &ttyctx);
713: ttyctx.bg = bg;
714:
715: if (s->cy < s->rupper || s->cy > s->rlower)
716: grid_view_delete_lines(gd, s->cy, ny, bg);
717: else
718: grid_view_delete_lines_region(gd, s->rlower, s->cy, ny, bg);
719:
720: screen_write_collect_flush(ctx, 0);
721: ttyctx.num = ny;
722: tty_write(tty_cmd_deleteline, &ttyctx);
723: }
724:
725: /* Clear line at cursor. */
726: void
727: screen_write_clearline(struct screen_write_ctx *ctx, u_int bg)
728: {
729: struct screen *s = ctx->s;
730: struct grid_line *gl;
731: struct tty_ctx ttyctx;
732: u_int sx = screen_size_x(s);
733:
734: gl = &s->grid->linedata[s->grid->hsize + s->cy];
735: if (gl->cellsize == 0 && bg == 8)
736: return;
737:
738: screen_write_initctx(ctx, &ttyctx);
739: ttyctx.bg = bg;
740:
741: grid_view_clear(s->grid, 0, s->cy, sx, 1, bg);
742:
743: screen_write_collect_clear(ctx, s->cy, 1);
744: screen_write_collect_flush(ctx, 0);
745: tty_write(tty_cmd_clearline, &ttyctx);
746: }
747:
748: /* Clear to end of line from cursor. */
749: void
750: screen_write_clearendofline(struct screen_write_ctx *ctx, u_int bg)
751: {
752: struct screen *s = ctx->s;
753: struct grid_line *gl;
754: struct tty_ctx ttyctx;
755: u_int sx = screen_size_x(s);
756:
757: gl = &s->grid->linedata[s->grid->hsize + s->cy];
758: if (s->cx > sx - 1 || (s->cx >= gl->cellsize && bg == 8))
759: return;
760:
761: screen_write_initctx(ctx, &ttyctx);
762: ttyctx.bg = bg;
763:
764: grid_view_clear(s->grid, s->cx, s->cy, sx - s->cx, 1, bg);
765:
766: if (s->cx == 0)
767: screen_write_collect_clear(ctx, s->cy, 1);
768: screen_write_collect_flush(ctx, 0);
769: tty_write(tty_cmd_clearendofline, &ttyctx);
770: }
771:
772: /* Clear to start of line from cursor. */
773: void
774: screen_write_clearstartofline(struct screen_write_ctx *ctx, u_int bg)
775: {
776: struct screen *s = ctx->s;
777: struct tty_ctx ttyctx;
778: u_int sx = screen_size_x(s);
779:
780: screen_write_initctx(ctx, &ttyctx);
781: ttyctx.bg = bg;
782:
783: if (s->cx > sx - 1)
784: grid_view_clear(s->grid, 0, s->cy, sx, 1, bg);
785: else
786: grid_view_clear(s->grid, 0, s->cy, s->cx + 1, 1, bg);
787:
788: if (s->cx > sx - 1)
789: screen_write_collect_clear(ctx, s->cy, 1);
790: screen_write_collect_flush(ctx, 0);
791: tty_write(tty_cmd_clearstartofline, &ttyctx);
792: }
793:
794: /* Move cursor to px,py. */
795: void
796: screen_write_cursormove(struct screen_write_ctx *ctx, u_int px, u_int py)
797: {
798: struct screen *s = ctx->s;
799:
800: if (px > screen_size_x(s) - 1)
801: px = screen_size_x(s) - 1;
802: if (py > screen_size_y(s) - 1)
803: py = screen_size_y(s) - 1;
804:
805: s->cx = px;
806: s->cy = py;
807: }
808:
809: /* Reverse index (up with scroll). */
810: void
811: screen_write_reverseindex(struct screen_write_ctx *ctx)
812: {
813: struct screen *s = ctx->s;
814: struct tty_ctx ttyctx;
815:
816: screen_write_initctx(ctx, &ttyctx);
817:
818: if (s->cy == s->rupper)
819: grid_view_scroll_region_down(s->grid, s->rupper, s->rlower);
820: else if (s->cy > 0)
821: s->cy--;
822:
823: screen_write_collect_flush(ctx, 0);
824: tty_write(tty_cmd_reverseindex, &ttyctx);
825: }
826:
827: /* Set scroll region. */
828: void
829: screen_write_scrollregion(struct screen_write_ctx *ctx, u_int rupper,
830: u_int rlower)
831: {
832: struct screen *s = ctx->s;
833:
834: if (rupper > screen_size_y(s) - 1)
835: rupper = screen_size_y(s) - 1;
836: if (rlower > screen_size_y(s) - 1)
837: rlower = screen_size_y(s) - 1;
838: if (rupper >= rlower) /* cannot be one line */
839: return;
840:
841: screen_write_collect_flush(ctx, 0);
842:
843: /* Cursor moves to top-left. */
844: s->cx = 0;
845: s->cy = 0;
846:
847: s->rupper = rupper;
848: s->rlower = rlower;
849: }
850:
851: /* Line feed. */
852: void
853: screen_write_linefeed(struct screen_write_ctx *ctx, int wrapped)
854: {
855: struct screen *s = ctx->s;
856: struct grid *gd = s->grid;
857: struct grid_line *gl;
858:
859: gl = &gd->linedata[gd->hsize + s->cy];
860: if (wrapped)
861: gl->flags |= GRID_LINE_WRAPPED;
862: else
863: gl->flags &= ~GRID_LINE_WRAPPED;
864:
865: log_debug("%s: at %u,%u (region %u-%u)", __func__, s->cx, s->cy,
866: s->rupper, s->rlower);
867:
868: if (s->cy == s->rlower) {
869: grid_view_scroll_region_up(gd, s->rupper, s->rlower);
870: screen_write_collect_scroll(ctx);
871: ctx->scrolled++;
872: } else if (s->cy < screen_size_y(s) - 1)
873: s->cy++;
874: }
875:
876: /* Scroll up. */
877: void
878: screen_write_scrollup(struct screen_write_ctx *ctx, u_int lines)
879: {
880: struct screen *s = ctx->s;
881: struct grid *gd = s->grid;
882: u_int i;
883:
884: if (lines == 0)
885: lines = 1;
886: else if (lines > s->rlower - s->rupper + 1)
887: lines = s->rlower - s->rupper + 1;
888:
889: for (i = 0; i < lines; i++) {
890: grid_view_scroll_region_up(gd, s->rupper, s->rlower);
891: screen_write_collect_scroll(ctx);
892: }
893: ctx->scrolled += lines;
894: }
895:
896: /* Carriage return (cursor to start of line). */
897: void
898: screen_write_carriagereturn(struct screen_write_ctx *ctx)
899: {
900: struct screen *s = ctx->s;
901:
902: s->cx = 0;
903: }
904:
905: /* Clear to end of screen from cursor. */
906: void
907: screen_write_clearendofscreen(struct screen_write_ctx *ctx, u_int bg)
908: {
909: struct screen *s = ctx->s;
910: struct grid *gd = s->grid;
911: struct tty_ctx ttyctx;
912: u_int sx = screen_size_x(s), sy = screen_size_y(s);
913:
914: screen_write_initctx(ctx, &ttyctx);
915: ttyctx.bg = bg;
916:
917: /* Scroll into history if it is enabled and clearing entire screen. */
918: if (s->cx == 0 && s->cy == 0 && (gd->flags & GRID_HISTORY))
919: grid_view_clear_history(gd, bg);
920: else {
921: if (s->cx <= sx - 1)
922: grid_view_clear(gd, s->cx, s->cy, sx - s->cx, 1, bg);
923: grid_view_clear(gd, 0, s->cy + 1, sx, sy - (s->cy + 1), bg);
924: }
925:
926: screen_write_collect_clear(ctx, s->cy + 1, sy - (s->cy + 1));
927: screen_write_collect_flush(ctx, 0);
928: tty_write(tty_cmd_clearendofscreen, &ttyctx);
929: }
930:
931: /* Clear to start of screen. */
932: void
933: screen_write_clearstartofscreen(struct screen_write_ctx *ctx, u_int bg)
934: {
935: struct screen *s = ctx->s;
936: struct tty_ctx ttyctx;
937: u_int sx = screen_size_x(s);
938:
939: screen_write_initctx(ctx, &ttyctx);
940: ttyctx.bg = bg;
941:
942: if (s->cy > 0)
943: grid_view_clear(s->grid, 0, 0, sx, s->cy, bg);
944: if (s->cx > sx - 1)
945: grid_view_clear(s->grid, 0, s->cy, sx, 1, 8);
946: else
947: grid_view_clear(s->grid, 0, s->cy, s->cx + 1, 1, 8);
948:
949: screen_write_collect_clear(ctx, 0, s->cy);
950: screen_write_collect_flush(ctx, 0);
951: tty_write(tty_cmd_clearstartofscreen, &ttyctx);
952: }
953:
954: /* Clear entire screen. */
955: void
956: screen_write_clearscreen(struct screen_write_ctx *ctx, u_int bg)
957: {
958: struct screen *s = ctx->s;
959: struct tty_ctx ttyctx;
960: u_int sx = screen_size_x(s), sy = screen_size_y(s);
961:
962: screen_write_initctx(ctx, &ttyctx);
963: ttyctx.bg = bg;
964:
965: /* Scroll into history if it is enabled. */
966: if (s->grid->flags & GRID_HISTORY)
967: grid_view_clear_history(s->grid, bg);
968: else
969: grid_view_clear(s->grid, 0, 0, sx, sy, bg);
970:
971: screen_write_collect_clear(ctx, 0, sy);
972: tty_write(tty_cmd_clearscreen, &ttyctx);
973: }
974:
975: /* Clear entire history. */
976: void
977: screen_write_clearhistory(struct screen_write_ctx *ctx)
978: {
979: struct screen *s = ctx->s;
980: struct grid *gd = s->grid;
981:
982: grid_move_lines(gd, 0, gd->hsize, gd->sy, 8);
983: gd->hscrolled = gd->hsize = 0;
984: }
985:
986: /* Clear a collected line. */
987: static void
988: screen_write_collect_clear(struct screen_write_ctx *ctx, u_int y, u_int n)
989: {
990: struct screen_write_collect_item *ci, *tmp;
991: u_int i;
992: size_t size;
993:
994: for (i = y ; i < y + n; i++) {
995: if (TAILQ_EMPTY(&ctx->list[i].items))
996: continue;
997: size = 0;
998: TAILQ_FOREACH_SAFE(ci, &ctx->list[i].items, entry, tmp) {
999: size += ci->used;
1000: TAILQ_REMOVE(&ctx->list[i].items, ci, entry);
1001: free(ci);
1002: }
1003: ctx->skipped += size;
1004: log_debug("%s: dropped %zu bytes (line %u)", __func__, size, i);
1005: }
1006: }
1007:
1008: /* Scroll collected lines up. */
1009: static void
1010: screen_write_collect_scroll(struct screen_write_ctx *ctx)
1011: {
1012: struct screen *s = ctx->s;
1013: struct screen_write_collect_line *cl;
1014: u_int y;
1015:
1016: log_debug("%s: at %u,%u (region %u-%u)", __func__, s->cx, s->cy,
1017: s->rupper, s->rlower);
1018:
1019: screen_write_collect_clear(ctx, s->rupper, 1);
1020: for (y = s->rupper; y < s->rlower; y++) {
1021: cl = &ctx->list[y + 1];
1022: TAILQ_CONCAT(&ctx->list[y].items, &cl->items, entry);
1023: TAILQ_INIT(&cl->items);
1024: }
1025: }
1026:
1027: /* Flush collected lines. */
1028: static void
1029: screen_write_collect_flush(struct screen_write_ctx *ctx, int scroll_only)
1030: {
1031: struct screen *s = ctx->s;
1032: struct screen_write_collect_item *ci, *tmp;
1033: u_int y, cx, cy, items = 0;
1034: struct tty_ctx ttyctx;
1035: size_t written = 0;
1036:
1037: if (ctx->scrolled != 0) {
1038: log_debug("%s: scrolled %u (region %u-%u)", __func__,
1039: ctx->scrolled, s->rupper, s->rlower);
1040: if (ctx->scrolled > s->rlower - s->rupper + 1)
1041: ctx->scrolled = s->rlower - s->rupper + 1;
1042:
1043: screen_write_initctx(ctx, &ttyctx);
1044: ttyctx.num = ctx->scrolled;
1045: tty_write(tty_cmd_scrollup, &ttyctx);
1046: }
1047: ctx->scrolled = 0;
1048: if (scroll_only)
1049: return;
1050:
1051: cx = s->cx; cy = s->cy;
1052: for (y = 0; y < screen_size_y(s); y++) {
1053: TAILQ_FOREACH_SAFE(ci, &ctx->list[y].items, entry, tmp) {
1054: screen_write_cursormove(ctx, ci->x, y);
1055: screen_write_initctx(ctx, &ttyctx);
1056: ttyctx.cell = &ci->gc;
1057: ttyctx.ptr = ci->data;
1058: ttyctx.num = ci->used;
1059: tty_write(tty_cmd_cells, &ttyctx);
1060:
1061: items++;
1062: written += ci->used;
1063:
1064: TAILQ_REMOVE(&ctx->list[y].items, ci, entry);
1065: free(ci);
1066: }
1067: }
1068: s->cx = cx; s->cy = cy;
1069:
1070: log_debug("%s: flushed %u items (%zu bytes)", __func__, items, written);
1071: ctx->written += written;
1072: }
1073:
1074: /* Finish and store collected cells. */
1075: void
1076: screen_write_collect_end(struct screen_write_ctx *ctx)
1077: {
1078: struct screen *s = ctx->s;
1079: struct screen_write_collect_item *ci = ctx->item;
1080: struct grid_cell gc;
1081:
1082: if (ci->used == 0)
1083: return;
1084: ci->data[ci->used] = '\0';
1085:
1086: ci->x = s->cx;
1087: TAILQ_INSERT_TAIL(&ctx->list[s->cy].items, ci, entry);
1088: ctx->item = xcalloc(1, sizeof *ctx->item);
1089:
1090: log_debug("%s: %u %s (at %u,%u)", __func__, ci->used, ci->data, s->cx,
1091: s->cy);
1092:
1093: memcpy(&gc, &ci->gc, sizeof gc);
1094: grid_view_set_cells(s->grid, s->cx, s->cy, &gc, ci->data, ci->used);
1095: s->cx += ci->used;
1096: }
1097:
1098: /* Write cell data, collecting if necessary. */
1099: void
1100: screen_write_collect_add(struct screen_write_ctx *ctx,
1101: const struct grid_cell *gc)
1102: {
1103: struct screen *s = ctx->s;
1104: struct screen_write_collect_item *ci;
1105: u_int sx = screen_size_x(s);
1106: int collect;
1107:
1108: /*
1109: * Don't need to check that the attributes and whatnot are still the
1110: * same - input_parse will end the collection when anything that isn't
1111: * a plain character is encountered. Also nothing should make it here
1112: * that isn't a single ASCII character.
1113: */
1114:
1115: collect = 1;
1116: if (gc->data.width != 1)
1117: collect = 0;
1118: else if (gc->attr & GRID_ATTR_CHARSET)
1119: collect = 0;
1120: else if (~s->mode & MODE_WRAP)
1121: collect = 0;
1122: else if (s->mode & MODE_INSERT)
1123: collect = 0;
1124: else if (s->sel.flag)
1125: collect = 0;
1126: if (!collect) {
1127: screen_write_collect_end(ctx);
1128: screen_write_collect_flush(ctx, 0);
1129: screen_write_cell(ctx, gc);
1130: return;
1131: }
1132: ctx->cells++;
1133:
1134: if (s->cx > sx - 1 || ctx->item->used > sx - 1 - s->cx)
1135: screen_write_collect_end(ctx);
1136: if (s->cx > sx - 1) {
1137: log_debug("%s: wrapped at %u,%u", __func__, s->cx, s->cy);
1138: screen_write_linefeed(ctx, 1);
1139: s->cx = 0;
1140: }
1141:
1142: ci = ctx->item; /* may have changed */
1143: if (ci->used == 0)
1144: memcpy(&ci->gc, gc, sizeof ci->gc);
1145: ci->data[ci->used++] = gc->data.data[0];
1146: if (ci->used == (sizeof ci->data) - 1)
1147: screen_write_collect_end(ctx);
1148: }
1149:
1150: /* Write cell data. */
1151: void
1152: screen_write_cell(struct screen_write_ctx *ctx, const struct grid_cell *gc)
1153: {
1154: struct screen *s = ctx->s;
1155: struct grid *gd = s->grid;
1156: struct grid_line *gl;
1157: struct grid_cell_entry *gce;
1158: struct grid_cell tmp_gc, now_gc;
1159: struct tty_ctx ttyctx;
1160: u_int sx = screen_size_x(s), sy = screen_size_y(s);
1161: u_int width = gc->data.width, xx, last, cx, cy;
1162: int selected, skip = 1;
1163:
1164: /* Ignore padding cells. */
1165: if (gc->flags & GRID_FLAG_PADDING)
1166: return;
1167: ctx->cells++;
1168:
1169: /* If the width is zero, combine onto the previous character. */
1170: if (width == 0) {
1171: screen_write_collect_flush(ctx, 0);
1172: if ((gc = screen_write_combine(ctx, &gc->data, &xx)) != 0) {
1173: cx = s->cx; cy = s->cy;
1174: screen_write_cursormove(ctx, xx, s->cy);
1175: screen_write_initctx(ctx, &ttyctx);
1176: ttyctx.cell = gc;
1177: tty_write(tty_cmd_cell, &ttyctx);
1178: s->cx = cx; s->cy = cy;
1179: }
1180: return;
1181: }
1182:
1183: /* Flush any existing scrolling. */
1184: screen_write_collect_flush(ctx, 1);
1185:
1186: /* If this character doesn't fit, ignore it. */
1187: if ((~s->mode & MODE_WRAP) &&
1188: width > 1 &&
1189: (width > sx || (s->cx != sx && s->cx > sx - width)))
1190: return;
1191:
1192: /* If in insert mode, make space for the cells. */
1193: if (s->mode & MODE_INSERT) {
1194: grid_view_insert_cells(s->grid, s->cx, s->cy, width, 8);
1195: skip = 0;
1196: }
1197:
1198: /* Check this will fit on the current line and wrap if not. */
1199: if ((s->mode & MODE_WRAP) && s->cx > sx - width) {
1200: screen_write_linefeed(ctx, 1);
1201: s->cx = 0;
1202: }
1203:
1204: /* Sanity check cursor position. */
1205: if (s->cx > sx - width || s->cy > sy - 1)
1206: return;
1207: screen_write_initctx(ctx, &ttyctx);
1208:
1209: /* Handle overwriting of UTF-8 characters. */
1210: gl = &s->grid->linedata[s->grid->hsize + s->cy];
1211: if (gl->flags & GRID_LINE_EXTENDED) {
1212: grid_view_get_cell(gd, s->cx, s->cy, &now_gc);
1213: if (screen_write_overwrite(ctx, &now_gc, width))
1214: skip = 0;
1215: }
1216:
1217: /*
1218: * If the new character is UTF-8 wide, fill in padding cells. Have
1219: * already ensured there is enough room.
1220: */
1221: for (xx = s->cx + 1; xx < s->cx + width; xx++) {
1222: grid_view_set_cell(gd, xx, s->cy, &screen_write_pad_cell);
1223: skip = 0;
1224: }
1225:
1226: /* If no change, do not draw. */
1227: if (skip) {
1228: if (s->cx >= gl->cellsize)
1229: skip = grid_cells_equal(gc, &grid_default_cell);
1230: else {
1231: gce = &gl->celldata[s->cx];
1232: if (gce->flags & GRID_FLAG_EXTENDED)
1233: skip = 0;
1234: else if (gc->flags != gce->flags)
1235: skip = 0;
1236: else if (gc->attr != gce->data.attr)
1237: skip = 0;
1238: else if (gc->fg != gce->data.fg)
1239: skip = 0;
1240: else if (gc->bg != gce->data.bg)
1241: skip = 0;
1242: else if (gc->data.width != 1)
1243: skip = 0;
1244: else if (gc->data.size != 1)
1245: skip = 0;
1246: else if (gce->data.data != gc->data.data[0])
1247: skip = 0;
1248: }
1249: }
1250:
1251: /* Update the selection the flag and set the cell. */
1252: selected = screen_check_selection(s, s->cx, s->cy);
1253: if (selected && (~gc->flags & GRID_FLAG_SELECTED)) {
1254: memcpy(&tmp_gc, gc, sizeof tmp_gc);
1255: tmp_gc.flags |= GRID_FLAG_SELECTED;
1256: grid_view_set_cell(gd, s->cx, s->cy, &tmp_gc);
1257: } else if (!selected && (gc->flags & GRID_FLAG_SELECTED)) {
1258: memcpy(&tmp_gc, gc, sizeof tmp_gc);
1259: tmp_gc.flags &= ~GRID_FLAG_SELECTED;
1260: grid_view_set_cell(gd, s->cx, s->cy, &tmp_gc);
1261: } else if (!skip)
1262: grid_view_set_cell(gd, s->cx, s->cy, gc);
1263: if (selected)
1264: skip = 0;
1265:
1266: /*
1267: * Move the cursor. If not wrapping, stick at the last character and
1268: * replace it.
1269: */
1270: last = !(s->mode & MODE_WRAP);
1271: if (s->cx <= sx - last - width)
1272: s->cx += width;
1273: else
1274: s->cx = sx - last;
1275:
1276: /* Create space for character in insert mode. */
1277: if (s->mode & MODE_INSERT) {
1278: screen_write_collect_flush(ctx, 0);
1279: ttyctx.num = width;
1280: tty_write(tty_cmd_insertcharacter, &ttyctx);
1281: }
1282:
1283: /* Write to the screen. */
1284: if (!skip) {
1285: if (selected) {
1286: screen_select_cell(s, &tmp_gc, gc);
1287: ttyctx.cell = &tmp_gc;
1288: } else
1289: ttyctx.cell = gc;
1290: tty_write(tty_cmd_cell, &ttyctx);
1291: ctx->written++;
1292: } else
1293: ctx->skipped++;
1294: }
1295:
1296: /* Combine a UTF-8 zero-width character onto the previous. */
1297: static const struct grid_cell *
1298: screen_write_combine(struct screen_write_ctx *ctx, const struct utf8_data *ud,
1299: u_int *xx)
1300: {
1301: struct screen *s = ctx->s;
1302: struct grid *gd = s->grid;
1303: static struct grid_cell gc;
1304: u_int n;
1305:
1306: /* Can't combine if at 0. */
1307: if (s->cx == 0)
1308: return (NULL);
1309:
1310: /* Empty data is out. */
1311: if (ud->size == 0)
1312: fatalx("UTF-8 data empty");
1313:
1314: /* Retrieve the previous cell. */
1315: for (n = 1; n < s->cx; n++) {
1316: grid_view_get_cell(gd, s->cx - n, s->cy, &gc);
1317: if (~gc.flags & GRID_FLAG_PADDING)
1318: break;
1319: }
1320: if (n == s->cx)
1321: return (NULL);
1322: *xx = s->cx - n;
1323:
1324: /* Check there is enough space. */
1325: if (gc.data.size + ud->size > sizeof gc.data.data)
1326: return (NULL);
1327:
1328: log_debug("%s: %.*s onto %.*s at %u,%u", __func__, (int)ud->size,
1329: ud->data, (int)gc.data.size, gc.data.data, *xx, s->cy);
1330:
1331: /* Append the data. */
1332: memcpy(gc.data.data + gc.data.size, ud->data, ud->size);
1333: gc.data.size += ud->size;
1334:
1335: /* Set the new cell. */
1336: grid_view_set_cell(gd, *xx, s->cy, &gc);
1337:
1338: return (&gc);
1339: }
1340:
1341: /*
1342: * UTF-8 wide characters are a bit of an annoyance. They take up more than one
1343: * cell on the screen, so following cells must not be drawn by marking them as
1344: * padding.
1345: *
1346: * So far, so good. The problem is, when overwriting a padding cell, or a UTF-8
1347: * character, it is necessary to also overwrite any other cells which covered
1348: * by the same character.
1349: */
1350: static int
1351: screen_write_overwrite(struct screen_write_ctx *ctx, struct grid_cell *gc,
1352: u_int width)
1353: {
1354: struct screen *s = ctx->s;
1355: struct grid *gd = s->grid;
1356: struct grid_cell tmp_gc;
1357: u_int xx;
1358: int done = 0;
1359:
1360: if (gc->flags & GRID_FLAG_PADDING) {
1361: /*
1362: * A padding cell, so clear any following and leading padding
1363: * cells back to the character. Don't overwrite the current
1364: * cell as that happens later anyway.
1365: */
1366: xx = s->cx + 1;
1367: while (--xx > 0) {
1368: grid_view_get_cell(gd, xx, s->cy, &tmp_gc);
1369: if (~tmp_gc.flags & GRID_FLAG_PADDING)
1370: break;
1371: grid_view_set_cell(gd, xx, s->cy, &grid_default_cell);
1372: }
1373:
1374: /* Overwrite the character at the start of this padding. */
1375: grid_view_set_cell(gd, xx, s->cy, &grid_default_cell);
1376: done = 1;
1377: }
1378:
1379: /*
1380: * Overwrite any padding cells that belong to any UTF-8 characters
1381: * we'll be overwriting with the current character.
1382: */
1383: if (width != 1 ||
1384: gc->data.width != 1 ||
1385: gc->flags & GRID_FLAG_PADDING) {
1386: xx = s->cx + width - 1;
1387: while (++xx < screen_size_x(s)) {
1388: grid_view_get_cell(gd, xx, s->cy, &tmp_gc);
1389: if (~tmp_gc.flags & GRID_FLAG_PADDING)
1390: break;
1391: grid_view_set_cell(gd, xx, s->cy, &grid_default_cell);
1392: done = 1;
1393: }
1394: }
1395:
1396: return (done);
1397: }
1398:
1399: /* Set external clipboard. */
1400: void
1401: screen_write_setselection(struct screen_write_ctx *ctx, u_char *str, u_int len)
1402: {
1403: struct tty_ctx ttyctx;
1404:
1405: screen_write_initctx(ctx, &ttyctx);
1406: ttyctx.ptr = str;
1407: ttyctx.num = len;
1408:
1409: tty_write(tty_cmd_setselection, &ttyctx);
1410: }
1411:
1412: /* Write unmodified string. */
1413: void
1414: screen_write_rawstring(struct screen_write_ctx *ctx, u_char *str, u_int len)
1415: {
1416: struct tty_ctx ttyctx;
1417:
1418: screen_write_initctx(ctx, &ttyctx);
1419: ttyctx.ptr = str;
1420: ttyctx.num = len;
1421:
1422: tty_write(tty_cmd_rawstring, &ttyctx);
1423: }