Annotation of src/usr.bin/tmux/screen-write.c, Revision 1.101
1.101 ! nicm 1: /* $OpenBSD: screen-write.c,v 1.100 2016/10/18 08:39:18 nicm Exp $ */
1.1 nicm 2:
3: /*
1.84 nicm 4: * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
1.1 nicm 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:
1.56 nicm 21: #include <stdlib.h>
1.1 nicm 22: #include <string.h>
23:
24: #include "tmux.h"
25:
1.87 nicm 26: static void screen_write_initctx(struct screen_write_ctx *,
27: struct tty_ctx *);
28: static void screen_write_save_last(struct screen_write_ctx *,
29: struct tty_ctx *);
1.92 nicm 30: static void screen_write_flush(struct screen_write_ctx *);
1.87 nicm 31:
1.89 nicm 32: static int screen_write_overwrite(struct screen_write_ctx *,
33: struct grid_cell *, u_int);
1.87 nicm 34: static int screen_write_combine(struct screen_write_ctx *,
35: const struct utf8_data *);
1.1 nicm 36:
1.88 nicm 37: static const struct grid_cell screen_write_pad_cell = {
1.91 nicm 38: GRID_FLAG_PADDING, 0, 8, 8, { { 0 }, 0, 0, 0 }
1.88 nicm 39: };
40:
1.92 nicm 41: #define screen_dirty_bit(s, x, y) (((y) * screen_size_x(s)) + (x))
42: #define screen_dirty_clear(s, sx, sy, ex, ey) \
43: do { \
44: if (s->dirty != NULL) { \
45: bit_nclear(s->dirty, \
46: screen_dirty_bit(s, sx, sy), \
47: screen_dirty_bit(s, ex, ey)); \
48: } \
49: } while (0)
50:
51: /* Initialize writing with a window. */
1.1 nicm 52: void
1.71 nicm 53: screen_write_start(struct screen_write_ctx *ctx, struct window_pane *wp,
54: struct screen *s)
1.1 nicm 55: {
1.92 nicm 56: u_int size;
57: char tmp[16];
58: const char *cp = tmp;
59:
1.1 nicm 60: ctx->wp = wp;
61: if (wp != NULL && s == NULL)
62: ctx->s = wp->screen;
63: else
64: ctx->s = s;
1.92 nicm 65:
66: size = screen_size_x(ctx->s) * screen_size_y(ctx->s);
67: if (ctx->s->dirtysize != size) {
68: free(ctx->s->dirty);
69: ctx->s->dirty = NULL;
70: ctx->s->dirtysize = size;
71: }
72: ctx->dirty = 0;
73:
74: ctx->cells = ctx->written = ctx->skipped = 0;
75:
76: if (wp == NULL)
77: cp = "no pane";
78: else
79: snprintf(tmp, sizeof tmp, "pane %%%u", wp->id);
80: log_debug("%s: size %ux%u, %s", __func__, screen_size_x(ctx->s),
81: screen_size_y(ctx->s), cp);
1.1 nicm 82: }
83:
84: /* Finish writing. */
85: void
1.92 nicm 86: screen_write_stop(struct screen_write_ctx *ctx)
87: {
88: screen_write_flush(ctx);
89:
90: log_debug("%s: %u of %u written (dirty %u, skipped %u)", __func__,
91: ctx->written, ctx->cells, ctx->cells - ctx->written, ctx->skipped);
92: }
93:
94: /* Flush outstanding cell writes. */
95: static void
96: screen_write_flush(struct screen_write_ctx *ctx)
1.1 nicm 97: {
1.92 nicm 98: struct screen *s = ctx->s;
99: struct tty_ctx ttyctx;
100: u_int x, y, offset, cx, cy, dirty;
101: struct grid_cell gc;
102:
103: if (ctx->dirty == 0)
104: return;
105: dirty = 0;
1.98 nicm 106: log_debug("%s: dirty %u", __func__, ctx->dirty);
1.92 nicm 107:
108: cx = s->cx;
109: cy = s->cy;
110:
111: offset = 0;
112: for (y = 0; y < screen_size_y(s); y++) {
113: for (x = 0; x < screen_size_x(s); x++) {
114: offset++;
115: if (!bit_test(s->dirty, offset - 1))
116: continue;
117: bit_clear(s->dirty, offset - 1);
118:
119: screen_write_cursormove(ctx, x, y);
120: grid_view_get_cell(s->grid, x, y, &gc);
121:
122: screen_write_initctx(ctx, &ttyctx);
123: ttyctx.cell = &gc;
124: tty_write(tty_cmd_cell, &ttyctx);
125: ctx->written++;
126:
127: if (++dirty == ctx->dirty)
128: break;
129: }
130: if (dirty == ctx->dirty)
131: break;
132: }
1.100 nicm 133: ctx->dirty = 0;
1.92 nicm 134:
135: s->cx = cx;
136: s->cy = cy;
1.52 nicm 137: }
138:
139: /* Reset screen state. */
140: void
141: screen_write_reset(struct screen_write_ctx *ctx)
142: {
1.61 nicm 143: struct screen *s = ctx->s;
1.52 nicm 144:
1.61 nicm 145: screen_reset_tabs(s);
146: screen_write_scrollregion(ctx, 0, screen_size_y(s) - 1);
1.63 nicm 147:
1.67 nicm 148: s->mode &= ~(MODE_INSERT|MODE_KCURSOR|MODE_KKEYPAD|MODE_FOCUSON);
1.82 nicm 149: s->mode &= ~(ALL_MOUSE_MODES|MODE_MOUSE_UTF8|MODE_MOUSE_SGR);
1.52 nicm 150:
1.99 nicm 151: screen_write_clearscreen(ctx, 8);
1.52 nicm 152: screen_write_cursormove(ctx, 0, 0);
1.1 nicm 153: }
154:
155: /* Write character. */
156: void
1.86 nicm 157: screen_write_putc(struct screen_write_ctx *ctx, const struct grid_cell *gcp,
1.69 nicm 158: u_char ch)
1.1 nicm 159: {
1.86 nicm 160: struct grid_cell gc;
161:
162: memcpy(&gc, gcp, sizeof gc);
163:
164: utf8_set(&gc.data, ch);
165: screen_write_cell(ctx, &gc);
1.1 nicm 166: }
167:
1.24 nicm 168: /* Calculate string length, with embedded formatting. */
1.71 nicm 169: size_t
1.75 nicm 170: screen_write_cstrlen(const char *fmt, ...)
1.24 nicm 171: {
172: va_list ap;
173: char *msg, *msg2, *ptr, *ptr2;
174: size_t size;
175:
176: va_start(ap, fmt);
177: xvasprintf(&msg, fmt, ap);
178: va_end(ap);
179: msg2 = xmalloc(strlen(msg) + 1);
180:
181: ptr = msg;
182: ptr2 = msg2;
183: while (*ptr != '\0') {
184: if (ptr[0] == '#' && ptr[1] == '[') {
185: while (*ptr != ']' && *ptr != '\0')
186: ptr++;
187: if (*ptr == ']')
188: ptr++;
189: continue;
190: }
191: *ptr2++ = *ptr++;
192: }
193: *ptr2 = '\0';
194:
1.75 nicm 195: size = screen_write_strlen("%s", msg2);
1.24 nicm 196:
1.56 nicm 197: free(msg);
198: free(msg2);
1.24 nicm 199:
200: return (size);
201: }
202:
1.2 nicm 203: /* Calculate string length. */
1.71 nicm 204: size_t
1.75 nicm 205: screen_write_strlen(const char *fmt, ...)
1.2 nicm 206: {
1.36 nicm 207: va_list ap;
208: char *msg;
1.76 nicm 209: struct utf8_data ud;
1.36 nicm 210: u_char *ptr;
211: size_t left, size = 0;
1.79 nicm 212: enum utf8_state more;
1.2 nicm 213:
214: va_start(ap, fmt);
215: xvasprintf(&msg, fmt, ap);
216: va_end(ap);
217:
218: ptr = msg;
219: while (*ptr != '\0') {
1.79 nicm 220: if (*ptr > 0x7f && utf8_open(&ud, *ptr) == UTF8_MORE) {
1.36 nicm 221: ptr++;
1.2 nicm 222:
223: left = strlen(ptr);
1.77 nicm 224: if (left < (size_t)ud.size - 1)
1.36 nicm 225: break;
1.79 nicm 226: while ((more = utf8_append(&ud, *ptr)) == UTF8_MORE)
1.2 nicm 227: ptr++;
1.36 nicm 228: ptr++;
229:
1.79 nicm 230: if (more == UTF8_DONE)
1.78 nicm 231: size += ud.width;
1.2 nicm 232: } else {
1.75 nicm 233: if (*ptr > 0x1f && *ptr < 0x7f)
234: size++;
1.2 nicm 235: ptr++;
236: }
1.7 ray 237: }
1.2 nicm 238:
1.56 nicm 239: free(msg);
1.2 nicm 240: return (size);
241: }
242:
1.3 nicm 243: /* Write simple string (no UTF-8 or maximum length). */
1.71 nicm 244: void
1.86 nicm 245: screen_write_puts(struct screen_write_ctx *ctx, const struct grid_cell *gcp,
1.71 nicm 246: const char *fmt, ...)
1.1 nicm 247: {
248: va_list ap;
249:
250: va_start(ap, fmt);
1.86 nicm 251: screen_write_vnputs(ctx, -1, gcp, fmt, ap);
1.2 nicm 252: va_end(ap);
253: }
254:
255: /* Write string with length limit (-1 for unlimited). */
1.71 nicm 256: void
257: screen_write_nputs(struct screen_write_ctx *ctx, ssize_t maxlen,
1.86 nicm 258: const struct grid_cell *gcp, const char *fmt, ...)
1.2 nicm 259: {
260: va_list ap;
261:
262: va_start(ap, fmt);
1.86 nicm 263: screen_write_vnputs(ctx, maxlen, gcp, fmt, ap);
1.2 nicm 264: va_end(ap);
265: }
266:
267: void
1.3 nicm 268: screen_write_vnputs(struct screen_write_ctx *ctx, ssize_t maxlen,
1.86 nicm 269: const struct grid_cell *gcp, const char *fmt, va_list ap)
1.2 nicm 270: {
1.86 nicm 271: struct grid_cell gc;
272: struct utf8_data *ud = &gc.data;
1.36 nicm 273: char *msg;
274: u_char *ptr;
275: size_t left, size = 0;
1.79 nicm 276: enum utf8_state more;
1.2 nicm 277:
1.86 nicm 278: memcpy(&gc, gcp, sizeof gc);
1.1 nicm 279: xvasprintf(&msg, fmt, ap);
280:
1.2 nicm 281: ptr = msg;
282: while (*ptr != '\0') {
1.86 nicm 283: if (*ptr > 0x7f && utf8_open(ud, *ptr) == UTF8_MORE) {
1.36 nicm 284: ptr++;
1.2 nicm 285:
286: left = strlen(ptr);
1.86 nicm 287: if (left < (size_t)ud->size - 1)
1.36 nicm 288: break;
1.86 nicm 289: while ((more = utf8_append(ud, *ptr)) == UTF8_MORE)
1.2 nicm 290: ptr++;
1.36 nicm 291: ptr++;
1.7 ray 292:
1.86 nicm 293: if (more != UTF8_DONE)
294: continue;
295: if (maxlen > 0 && size + ud->width > (size_t)maxlen) {
296: while (size < (size_t)maxlen) {
297: screen_write_putc(ctx, &gc, ' ');
298: size++;
1.2 nicm 299: }
1.86 nicm 300: break;
1.2 nicm 301: }
1.86 nicm 302: size += ud->width;
303: screen_write_cell(ctx, &gc);
1.2 nicm 304: } else {
1.86 nicm 305: if (maxlen > 0 && size + 1 > (size_t)maxlen)
1.2 nicm 306: break;
307:
1.57 nicm 308: if (*ptr == '\001')
1.86 nicm 309: gc.attr ^= GRID_ATTR_CHARSET;
1.75 nicm 310: else if (*ptr > 0x1f && *ptr < 0x7f) {
1.57 nicm 311: size++;
1.86 nicm 312: screen_write_putc(ctx, &gc, *ptr);
1.57 nicm 313: }
1.2 nicm 314: ptr++;
315: }
316: }
1.1 nicm 317:
1.56 nicm 318: free(msg);
1.24 nicm 319: }
320:
321: /* Write string, similar to nputs, but with embedded formatting (#[]). */
1.71 nicm 322: void
1.75 nicm 323: screen_write_cnputs(struct screen_write_ctx *ctx, ssize_t maxlen,
1.86 nicm 324: const struct grid_cell *gcp, const char *fmt, ...)
1.24 nicm 325: {
1.86 nicm 326: struct grid_cell gc;
327: struct utf8_data *ud = &gc.data;
1.24 nicm 328: va_list ap;
329: char *msg;
1.36 nicm 330: u_char *ptr, *last;
1.24 nicm 331: size_t left, size = 0;
1.79 nicm 332: enum utf8_state more;
1.24 nicm 333:
1.86 nicm 334: memcpy(&gc, gcp, sizeof gc);
335:
1.24 nicm 336: va_start(ap, fmt);
337: xvasprintf(&msg, fmt, ap);
338: va_end(ap);
339:
340: ptr = msg;
341: while (*ptr != '\0') {
342: if (ptr[0] == '#' && ptr[1] == '[') {
343: ptr += 2;
344: last = ptr + strcspn(ptr, "]");
345: if (*last == '\0') {
346: /* No ]. Not much point in doing anything. */
347: break;
348: }
349: *last = '\0';
350:
1.86 nicm 351: style_parse(gcp, &gc, ptr);
1.24 nicm 352: ptr = last + 1;
353: continue;
354: }
355:
1.86 nicm 356: if (*ptr > 0x7f && utf8_open(ud, *ptr) == UTF8_MORE) {
1.36 nicm 357: ptr++;
1.24 nicm 358:
359: left = strlen(ptr);
1.86 nicm 360: if (left < (size_t)ud->size - 1)
1.36 nicm 361: break;
1.86 nicm 362: while ((more = utf8_append(ud, *ptr)) == UTF8_MORE)
1.24 nicm 363: ptr++;
1.36 nicm 364: ptr++;
1.24 nicm 365:
1.86 nicm 366: if (more != UTF8_DONE)
367: continue;
368: if (maxlen > 0 && size + ud->width > (size_t)maxlen) {
369: while (size < (size_t)maxlen) {
370: screen_write_putc(ctx, &gc, ' ');
371: size++;
1.24 nicm 372: }
1.86 nicm 373: break;
1.24 nicm 374: }
1.86 nicm 375: size += ud->width;
376: screen_write_cell(ctx, &gc);
1.24 nicm 377: } else {
1.86 nicm 378: if (maxlen > 0 && size + 1 > (size_t)maxlen)
1.24 nicm 379: break;
380:
1.75 nicm 381: if (*ptr > 0x1f && *ptr < 0x7f) {
382: size++;
1.86 nicm 383: screen_write_putc(ctx, &gc, *ptr);
1.75 nicm 384: }
1.24 nicm 385: ptr++;
386: }
387: }
388:
1.56 nicm 389: free(msg);
1.1 nicm 390: }
391:
392: /* Copy from another screen. */
393: void
1.95 nicm 394: screen_write_copy(struct screen_write_ctx *ctx, struct screen *src, u_int px,
395: u_int py, u_int nx, u_int ny)
1.1 nicm 396: {
397: struct screen *s = ctx->s;
398: struct grid *gd = src->grid;
1.77 nicm 399: struct grid_cell gc;
1.96 nicm 400: u_int xx, yy, cx, cy;
1.1 nicm 401:
402: cx = s->cx;
403: cy = s->cy;
1.96 nicm 404:
1.1 nicm 405: for (yy = py; yy < py + ny; yy++) {
1.96 nicm 406: for (xx = px; xx < px + nx; xx++) {
407: grid_get_cell(gd, xx, yy, &gc);
408: screen_write_cell(ctx, &gc);
409: }
410:
1.1 nicm 411: cy++;
412: screen_write_cursormove(ctx, cx, cy);
413: }
414: }
415:
1.17 nicm 416: /* Set up context for TTY command. */
1.87 nicm 417: static void
418: screen_write_initctx(struct screen_write_ctx *ctx, struct tty_ctx *ttyctx)
1.1 nicm 419: {
1.87 nicm 420: struct screen *s = ctx->s;
1.1 nicm 421:
1.17 nicm 422: ttyctx->wp = ctx->wp;
1.1 nicm 423:
1.17 nicm 424: ttyctx->ocx = s->cx;
425: ttyctx->ocy = s->cy;
426:
427: ttyctx->orlower = s->rlower;
428: ttyctx->orupper = s->rupper;
1.87 nicm 429: }
1.31 nicm 430:
1.87 nicm 431: /* Save last cell on screen. */
432: static void
433: screen_write_save_last(struct screen_write_ctx *ctx, struct tty_ctx *ttyctx)
434: {
435: struct screen *s = ctx->s;
436: struct grid *gd = s->grid;
437: struct grid_cell gc;
438: u_int xx;
1.31 nicm 439:
1.77 nicm 440: memcpy(&gc, &grid_default_cell, sizeof gc);
1.38 nicm 441: for (xx = 1; xx <= screen_size_x(s); xx++) {
1.77 nicm 442: grid_view_get_cell(gd, screen_size_x(s) - xx, s->cy, &gc);
443: if (~gc.flags & GRID_FLAG_PADDING)
1.31 nicm 444: break;
445: }
1.77 nicm 446: memcpy(&ttyctx->last_cell, &gc, sizeof ttyctx->last_cell);
1.1 nicm 447: }
448:
1.61 nicm 449: /* Set a mode. */
450: void
451: screen_write_mode_set(struct screen_write_ctx *ctx, int mode)
452: {
453: struct screen *s = ctx->s;
454:
455: s->mode |= mode;
456: }
457:
458: /* Clear a mode. */
459: void
460: screen_write_mode_clear(struct screen_write_ctx *ctx, int mode)
461: {
462: struct screen *s = ctx->s;
463:
464: s->mode &= ~mode;
465: }
466:
1.1 nicm 467: /* Cursor up by ny. */
468: void
469: screen_write_cursorup(struct screen_write_ctx *ctx, u_int ny)
470: {
471: struct screen *s = ctx->s;
472:
473: if (ny == 0)
474: ny = 1;
475:
1.12 nicm 476: if (s->cy < s->rupper) {
477: /* Above region. */
478: if (ny > s->cy)
479: ny = s->cy;
480: } else {
481: /* Below region. */
482: if (ny > s->cy - s->rupper)
483: ny = s->cy - s->rupper;
484: }
1.66 nicm 485: if (s->cx == screen_size_x(s))
486: s->cx--;
1.1 nicm 487: if (ny == 0)
488: return;
489:
490: s->cy -= ny;
491: }
492:
493: /* Cursor down by ny. */
494: void
495: screen_write_cursordown(struct screen_write_ctx *ctx, u_int ny)
496: {
497: struct screen *s = ctx->s;
498:
499: if (ny == 0)
500: ny = 1;
501:
1.12 nicm 502: if (s->cy > s->rlower) {
503: /* Below region. */
504: if (ny > screen_size_y(s) - 1 - s->cy)
505: ny = screen_size_y(s) - 1 - s->cy;
506: } else {
507: /* Above region. */
508: if (ny > s->rlower - s->cy)
509: ny = s->rlower - s->cy;
510: }
1.66 nicm 511: if (s->cx == screen_size_x(s))
512: s->cx--;
1.1 nicm 513: if (ny == 0)
514: return;
515:
516: s->cy += ny;
517: }
518:
1.101 ! nicm 519: /* Cursor right by nx. */
1.1 nicm 520: void
521: screen_write_cursorright(struct screen_write_ctx *ctx, u_int nx)
522: {
523: struct screen *s = ctx->s;
524:
525: if (nx == 0)
526: nx = 1;
527:
528: if (nx > screen_size_x(s) - 1 - s->cx)
529: nx = screen_size_x(s) - 1 - s->cx;
530: if (nx == 0)
531: return;
532:
533: s->cx += nx;
534: }
535:
536: /* Cursor left by nx. */
537: void
538: screen_write_cursorleft(struct screen_write_ctx *ctx, u_int nx)
539: {
540: struct screen *s = ctx->s;
541:
542: if (nx == 0)
543: nx = 1;
544:
545: if (nx > s->cx)
546: nx = s->cx;
547: if (nx == 0)
548: return;
549:
550: s->cx -= nx;
1.5 nicm 551: }
552:
1.29 nicm 553: /* Backspace; cursor left unless at start of wrapped line when can move up. */
554: void
555: screen_write_backspace(struct screen_write_ctx *ctx)
556: {
557: struct screen *s = ctx->s;
558: struct grid_line *gl;
559:
560: if (s->cx == 0) {
561: if (s->cy == 0)
562: return;
563: gl = &s->grid->linedata[s->grid->hsize + s->cy - 1];
564: if (gl->flags & GRID_LINE_WRAPPED) {
565: s->cy--;
566: s->cx = screen_size_x(s) - 1;
567: }
568: } else
569: s->cx--;
570: }
571:
1.5 nicm 572: /* VT100 alignment test. */
573: void
574: screen_write_alignmenttest(struct screen_write_ctx *ctx)
575: {
576: struct screen *s = ctx->s;
1.17 nicm 577: struct tty_ctx ttyctx;
1.5 nicm 578: struct grid_cell gc;
579: u_int xx, yy;
1.92 nicm 580: u_int sx = screen_size_x(s), sy = screen_size_y(s);
1.5 nicm 581:
1.87 nicm 582: screen_write_initctx(ctx, &ttyctx);
1.17 nicm 583:
1.92 nicm 584: screen_dirty_clear(s, 0, 0, sx - 1, sy - 1);
585:
1.5 nicm 586: memcpy(&gc, &grid_default_cell, sizeof gc);
1.77 nicm 587: utf8_set(&gc.data, 'E');
1.7 ray 588:
1.5 nicm 589: for (yy = 0; yy < screen_size_y(s); yy++) {
590: for (xx = 0; xx < screen_size_x(s); xx++)
591: grid_view_set_cell(s->grid, xx, yy, &gc);
592: }
1.7 ray 593:
1.5 nicm 594: s->cx = 0;
595: s->cy = 0;
596:
597: s->rupper = 0;
598: s->rlower = screen_size_y(s) - 1;
599:
1.17 nicm 600: tty_write(tty_cmd_alignmenttest, &ttyctx);
1.1 nicm 601: }
602:
603: /* Insert nx characters. */
604: void
1.99 nicm 605: screen_write_insertcharacter(struct screen_write_ctx *ctx, u_int nx, u_int bg)
1.1 nicm 606: {
607: struct screen *s = ctx->s;
1.17 nicm 608: struct tty_ctx ttyctx;
1.1 nicm 609:
610: if (nx == 0)
611: nx = 1;
612:
1.9 nicm 613: if (nx > screen_size_x(s) - s->cx)
614: nx = screen_size_x(s) - s->cx;
1.1 nicm 615: if (nx == 0)
616: return;
617:
1.92 nicm 618: screen_write_flush(ctx);
1.87 nicm 619: screen_write_initctx(ctx, &ttyctx);
1.1 nicm 620:
621: if (s->cx <= screen_size_x(s) - 1)
1.99 nicm 622: grid_view_insert_cells(s->grid, s->cx, s->cy, nx, bg);
1.1 nicm 623:
1.17 nicm 624: ttyctx.num = nx;
1.99 nicm 625: ttyctx.bg = bg;
1.17 nicm 626: tty_write(tty_cmd_insertcharacter, &ttyctx);
1.1 nicm 627: }
628:
629: /* Delete nx characters. */
630: void
1.99 nicm 631: screen_write_deletecharacter(struct screen_write_ctx *ctx, u_int nx, u_int bg)
1.1 nicm 632: {
633: struct screen *s = ctx->s;
1.17 nicm 634: struct tty_ctx ttyctx;
1.1 nicm 635:
636: if (nx == 0)
637: nx = 1;
638:
1.9 nicm 639: if (nx > screen_size_x(s) - s->cx)
640: nx = screen_size_x(s) - s->cx;
1.1 nicm 641: if (nx == 0)
642: return;
643:
1.92 nicm 644: screen_write_flush(ctx);
1.87 nicm 645: screen_write_initctx(ctx, &ttyctx);
1.1 nicm 646:
647: if (s->cx <= screen_size_x(s) - 1)
1.99 nicm 648: grid_view_delete_cells(s->grid, s->cx, s->cy, nx, bg);
1.1 nicm 649:
1.17 nicm 650: ttyctx.num = nx;
1.99 nicm 651: ttyctx.bg = bg;
1.17 nicm 652: tty_write(tty_cmd_deletecharacter, &ttyctx);
1.59 nicm 653: }
654:
655: /* Clear nx characters. */
656: void
657: screen_write_clearcharacter(struct screen_write_ctx *ctx, u_int nx)
658: {
659: struct screen *s = ctx->s;
660: struct tty_ctx ttyctx;
661:
662: if (nx == 0)
663: nx = 1;
664:
665: if (nx > screen_size_x(s) - s->cx)
666: nx = screen_size_x(s) - s->cx;
667: if (nx == 0)
668: return;
669:
1.87 nicm 670: screen_write_initctx(ctx, &ttyctx);
1.59 nicm 671:
1.92 nicm 672: if (s->cx <= screen_size_x(s) - 1) {
673: screen_dirty_clear(s, s->cx, s->cy, s->cx + nx - 1, s->cy);
1.99 nicm 674: grid_view_clear(s->grid, s->cx, s->cy, nx, 1, 8);
1.92 nicm 675: } else
676: return;
1.59 nicm 677:
678: ttyctx.num = nx;
679: tty_write(tty_cmd_clearcharacter, &ttyctx);
1.1 nicm 680: }
681:
682: /* Insert ny lines. */
683: void
1.99 nicm 684: screen_write_insertline(struct screen_write_ctx *ctx, u_int ny, u_int bg)
1.1 nicm 685: {
686: struct screen *s = ctx->s;
1.17 nicm 687: struct tty_ctx ttyctx;
1.1 nicm 688:
689: if (ny == 0)
690: ny = 1;
691:
1.11 nicm 692: if (s->cy < s->rupper || s->cy > s->rlower) {
693: if (ny > screen_size_y(s) - s->cy)
694: ny = screen_size_y(s) - s->cy;
695: if (ny == 0)
696: return;
697:
1.92 nicm 698: screen_write_flush(ctx);
1.87 nicm 699: screen_write_initctx(ctx, &ttyctx);
1.11 nicm 700:
1.99 nicm 701: grid_view_insert_lines(s->grid, s->cy, ny, bg);
1.11 nicm 702:
1.17 nicm 703: ttyctx.num = ny;
1.99 nicm 704: ttyctx.bg = bg;
1.17 nicm 705: tty_write(tty_cmd_insertline, &ttyctx);
1.11 nicm 706: return;
707: }
708:
709: if (ny > s->rlower + 1 - s->cy)
710: ny = s->rlower + 1 - s->cy;
1.1 nicm 711: if (ny == 0)
712: return;
1.41 nicm 713:
1.92 nicm 714: screen_write_flush(ctx);
1.87 nicm 715: screen_write_initctx(ctx, &ttyctx);
1.1 nicm 716:
717: if (s->cy < s->rupper || s->cy > s->rlower)
1.99 nicm 718: grid_view_insert_lines(s->grid, s->cy, ny, bg);
719: else {
720: grid_view_insert_lines_region(s->grid, s->rlower, s->cy, ny,
721: bg);
722: }
1.1 nicm 723:
1.17 nicm 724: ttyctx.num = ny;
1.99 nicm 725: ttyctx.bg = bg;
1.17 nicm 726: tty_write(tty_cmd_insertline, &ttyctx);
1.1 nicm 727: }
728:
729: /* Delete ny lines. */
730: void
1.99 nicm 731: screen_write_deleteline(struct screen_write_ctx *ctx, u_int ny, u_int bg)
1.1 nicm 732: {
733: struct screen *s = ctx->s;
1.17 nicm 734: struct tty_ctx ttyctx;
1.1 nicm 735:
736: if (ny == 0)
737: ny = 1;
738:
1.11 nicm 739: if (s->cy < s->rupper || s->cy > s->rlower) {
740: if (ny > screen_size_y(s) - s->cy)
741: ny = screen_size_y(s) - s->cy;
742: if (ny == 0)
743: return;
744:
1.92 nicm 745: screen_write_flush(ctx);
1.87 nicm 746: screen_write_initctx(ctx, &ttyctx);
1.11 nicm 747:
1.99 nicm 748: grid_view_delete_lines(s->grid, s->cy, ny, bg);
1.11 nicm 749:
1.17 nicm 750: ttyctx.num = ny;
1.99 nicm 751: ttyctx.bg = bg;
1.17 nicm 752: tty_write(tty_cmd_deleteline, &ttyctx);
1.11 nicm 753: return;
754: }
1.41 nicm 755:
1.11 nicm 756: if (ny > s->rlower + 1 - s->cy)
757: ny = s->rlower + 1 - s->cy;
1.1 nicm 758: if (ny == 0)
759: return;
760:
1.92 nicm 761: screen_write_flush(ctx);
1.87 nicm 762: screen_write_initctx(ctx, &ttyctx);
1.1 nicm 763:
764: if (s->cy < s->rupper || s->cy > s->rlower)
1.99 nicm 765: grid_view_delete_lines(s->grid, s->cy, ny, bg);
766: else {
767: grid_view_delete_lines_region(s->grid, s->rlower, s->cy, ny,
768: bg);
769: }
1.1 nicm 770:
1.17 nicm 771: ttyctx.num = ny;
1.99 nicm 772: ttyctx.bg = bg;
1.17 nicm 773: tty_write(tty_cmd_deleteline, &ttyctx);
1.1 nicm 774: }
775:
776: /* Clear line at cursor. */
777: void
1.99 nicm 778: screen_write_clearline(struct screen_write_ctx *ctx, u_int bg)
1.1 nicm 779: {
1.92 nicm 780: struct screen *s = ctx->s;
781: struct grid_line *gl;
782: struct tty_ctx ttyctx;
783: u_int sx = screen_size_x(s);
1.1 nicm 784:
1.87 nicm 785: screen_write_initctx(ctx, &ttyctx);
1.99 nicm 786: ttyctx.bg = bg;
1.1 nicm 787:
1.92 nicm 788: gl = &s->grid->linedata[s->grid->hsize + s->cy];
1.99 nicm 789: if (gl->cellsize == 0 && bg == 8)
1.92 nicm 790: return;
1.1 nicm 791:
1.99 nicm 792: screen_dirty_clear(s, 0, s->cy, sx - 1, s->cy);
793: grid_view_clear(s->grid, 0, s->cy, sx, 1, bg);
794:
1.17 nicm 795: tty_write(tty_cmd_clearline, &ttyctx);
1.1 nicm 796: }
797:
798: /* Clear to end of line from cursor. */
799: void
1.99 nicm 800: screen_write_clearendofline(struct screen_write_ctx *ctx, u_int bg)
1.1 nicm 801: {
1.92 nicm 802: struct screen *s = ctx->s;
803: struct grid_line *gl;
804: struct tty_ctx ttyctx;
805: u_int sx = screen_size_x(s);
1.1 nicm 806:
1.87 nicm 807: screen_write_initctx(ctx, &ttyctx);
1.99 nicm 808: ttyctx.bg = bg;
1.1 nicm 809:
1.92 nicm 810: gl = &s->grid->linedata[s->grid->hsize + s->cy];
1.99 nicm 811: if (s->cx > sx - 1 || (s->cx >= gl->cellsize && bg == 8))
1.92 nicm 812: return;
1.1 nicm 813:
1.99 nicm 814: screen_dirty_clear(s, s->cx, s->cy, sx - 1, s->cy);
815: grid_view_clear(s->grid, s->cx, s->cy, sx - s->cx, 1, bg);
816:
1.41 nicm 817: tty_write(tty_cmd_clearendofline, &ttyctx);
1.1 nicm 818: }
819:
820: /* Clear to start of line from cursor. */
821: void
1.99 nicm 822: screen_write_clearstartofline(struct screen_write_ctx *ctx, u_int bg)
1.1 nicm 823: {
824: struct screen *s = ctx->s;
1.17 nicm 825: struct tty_ctx ttyctx;
1.92 nicm 826: u_int sx = screen_size_x(s);
1.1 nicm 827:
1.87 nicm 828: screen_write_initctx(ctx, &ttyctx);
1.99 nicm 829: ttyctx.bg = bg;
1.1 nicm 830:
1.92 nicm 831: if (s->cx > sx - 1) {
832: screen_dirty_clear(s, 0, s->cy, sx - 1, s->cy);
1.99 nicm 833: grid_view_clear(s->grid, 0, s->cy, sx, 1, bg);
1.92 nicm 834: } else {
835: screen_dirty_clear(s, 0, s->cy, s->cx, s->cy);
1.99 nicm 836: grid_view_clear(s->grid, 0, s->cy, s->cx + 1, 1, bg);
1.92 nicm 837: }
1.1 nicm 838:
1.17 nicm 839: tty_write(tty_cmd_clearstartofline, &ttyctx);
1.1 nicm 840: }
841:
1.101 ! nicm 842: /* Move cursor to px,py. */
1.1 nicm 843: void
844: screen_write_cursormove(struct screen_write_ctx *ctx, u_int px, u_int py)
845: {
846: struct screen *s = ctx->s;
847:
848: if (px > screen_size_x(s) - 1)
849: px = screen_size_x(s) - 1;
850: if (py > screen_size_y(s) - 1)
851: py = screen_size_y(s) - 1;
852:
853: s->cx = px;
854: s->cy = py;
855: }
856:
1.101 ! nicm 857: /* Reverse index (up with scroll). */
1.1 nicm 858: void
859: screen_write_reverseindex(struct screen_write_ctx *ctx)
860: {
861: struct screen *s = ctx->s;
1.17 nicm 862: struct tty_ctx ttyctx;
1.1 nicm 863:
1.87 nicm 864: screen_write_initctx(ctx, &ttyctx);
1.1 nicm 865:
1.92 nicm 866: if (s->cy == s->rupper) {
867: screen_write_flush(ctx);
1.1 nicm 868: grid_view_scroll_region_down(s->grid, s->rupper, s->rlower);
1.92 nicm 869: } else if (s->cy > 0)
1.1 nicm 870: s->cy--;
871:
1.17 nicm 872: tty_write(tty_cmd_reverseindex, &ttyctx);
1.1 nicm 873: }
874:
875: /* Set scroll region. */
876: void
1.83 nicm 877: screen_write_scrollregion(struct screen_write_ctx *ctx, u_int rupper,
878: u_int rlower)
1.1 nicm 879: {
880: struct screen *s = ctx->s;
881:
882: if (rupper > screen_size_y(s) - 1)
883: rupper = screen_size_y(s) - 1;
884: if (rlower > screen_size_y(s) - 1)
885: rlower = screen_size_y(s) - 1;
1.13 nicm 886: if (rupper >= rlower) /* cannot be one line */
1.1 nicm 887: return;
888:
889: /* Cursor moves to top-left. */
890: s->cx = 0;
891: s->cy = 0;
892:
893: s->rupper = rupper;
894: s->rlower = rlower;
895: }
896:
1.34 nicm 897: /* Line feed. */
1.1 nicm 898: void
1.34 nicm 899: screen_write_linefeed(struct screen_write_ctx *ctx, int wrapped)
1.1 nicm 900: {
1.20 nicm 901: struct screen *s = ctx->s;
902: struct grid_line *gl;
1.34 nicm 903: struct tty_ctx ttyctx;
1.92 nicm 904: u_int sx = screen_size_x(s), sy = screen_size_y(s);
1.34 nicm 905:
1.87 nicm 906: screen_write_initctx(ctx, &ttyctx);
1.1 nicm 907:
1.20 nicm 908: gl = &s->grid->linedata[s->grid->hsize + s->cy];
909: if (wrapped)
910: gl->flags |= GRID_LINE_WRAPPED;
1.73 nicm 911: else
912: gl->flags &= ~GRID_LINE_WRAPPED;
1.20 nicm 913:
1.92 nicm 914: if (s->cy == s->rlower) {
915: screen_dirty_clear(s, 0, s->rupper, sx - 1, s->rupper);
916: screen_write_flush(ctx);
1.1 nicm 917: grid_view_scroll_region_up(s->grid, s->rupper, s->rlower);
1.92 nicm 918: } else if (s->cy < sy - 1)
1.1 nicm 919: s->cy++;
920:
1.34 nicm 921: ttyctx.num = wrapped;
1.41 nicm 922: tty_write(tty_cmd_linefeed, &ttyctx);
1.1 nicm 923: }
924:
925: /* Carriage return (cursor to start of line). */
926: void
927: screen_write_carriagereturn(struct screen_write_ctx *ctx)
928: {
929: struct screen *s = ctx->s;
930:
931: s->cx = 0;
932: }
933:
934: /* Clear to end of screen from cursor. */
935: void
1.99 nicm 936: screen_write_clearendofscreen(struct screen_write_ctx *ctx, u_int bg)
1.1 nicm 937: {
938: struct screen *s = ctx->s;
1.17 nicm 939: struct tty_ctx ttyctx;
1.92 nicm 940: u_int sx = screen_size_x(s), sy = screen_size_y(s);
1.1 nicm 941:
1.87 nicm 942: screen_write_initctx(ctx, &ttyctx);
1.99 nicm 943: ttyctx.bg = bg;
1.1 nicm 944:
1.46 nicm 945: /* Scroll into history if it is enabled and clearing entire screen. */
1.99 nicm 946: if (s->cx == 0 && s->cy == 0 && s->grid->flags & GRID_HISTORY) {
1.92 nicm 947: screen_dirty_clear(s, 0, 0, sx - 1, sy - 1);
1.99 nicm 948: grid_view_clear_history(s->grid, bg);
1.92 nicm 949: } else {
950: if (s->cx <= sx - 1) {
951: screen_dirty_clear(s, s->cx, s->cy, sx - 1, s->cy);
1.99 nicm 952: grid_view_clear(s->grid, s->cx, s->cy, sx - s->cx, 1,
953: bg);
1.92 nicm 954: }
955: screen_dirty_clear(s, 0, s->cy + 1, sx - 1, sy - 1);
1.99 nicm 956: grid_view_clear(s->grid, 0, s->cy + 1, sx, sy - (s->cy + 1),
957: bg);
1.46 nicm 958: }
1.1 nicm 959:
1.17 nicm 960: tty_write(tty_cmd_clearendofscreen, &ttyctx);
1.1 nicm 961: }
962:
963: /* Clear to start of screen. */
964: void
965: screen_write_clearstartofscreen(struct screen_write_ctx *ctx)
966: {
967: struct screen *s = ctx->s;
1.17 nicm 968: struct tty_ctx ttyctx;
1.92 nicm 969: u_int sx = screen_size_x(s);
1.1 nicm 970:
1.87 nicm 971: screen_write_initctx(ctx, &ttyctx);
1.1 nicm 972:
1.92 nicm 973: if (s->cy > 0) {
974: screen_dirty_clear(s, 0, 0, sx - 1, s->cy);
1.99 nicm 975: grid_view_clear(s->grid, 0, 0, sx, s->cy, 8);
1.92 nicm 976: }
977: if (s->cx > sx - 1) {
978: screen_dirty_clear(s, 0, s->cy, sx - 1, s->cy);
1.99 nicm 979: grid_view_clear(s->grid, 0, s->cy, sx, 1, 8);
1.92 nicm 980: } else {
981: screen_dirty_clear(s, 0, s->cy, s->cx, s->cy);
1.99 nicm 982: grid_view_clear(s->grid, 0, s->cy, s->cx + 1, 1, 8);
1.92 nicm 983: }
1.1 nicm 984:
1.17 nicm 985: tty_write(tty_cmd_clearstartofscreen, &ttyctx);
1.1 nicm 986: }
987:
988: /* Clear entire screen. */
989: void
1.99 nicm 990: screen_write_clearscreen(struct screen_write_ctx *ctx, u_int bg)
1.1 nicm 991: {
992: struct screen *s = ctx->s;
1.17 nicm 993: struct tty_ctx ttyctx;
1.92 nicm 994: u_int sx = screen_size_x(s), sy = screen_size_y(s);
1.1 nicm 995:
1.87 nicm 996: screen_write_initctx(ctx, &ttyctx);
1.99 nicm 997: ttyctx.bg = bg;
1.1 nicm 998:
1.92 nicm 999: screen_dirty_clear(s, 0, 0, sx - 1, sy - 1);
1000:
1.46 nicm 1001: /* Scroll into history if it is enabled. */
1002: if (s->grid->flags & GRID_HISTORY)
1.99 nicm 1003: grid_view_clear_history(s->grid, bg);
1.83 nicm 1004: else
1.99 nicm 1005: grid_view_clear(s->grid, 0, 0, sx, sy, bg);
1.1 nicm 1006:
1.17 nicm 1007: tty_write(tty_cmd_clearscreen, &ttyctx);
1.51 nicm 1008: }
1009:
1010: /* Clear entire history. */
1011: void
1012: screen_write_clearhistory(struct screen_write_ctx *ctx)
1013: {
1014: struct screen *s = ctx->s;
1015: struct grid *gd = s->grid;
1016:
1.99 nicm 1017: grid_move_lines(gd, 0, gd->hsize, gd->sy, 8);
1.93 nicm 1018: gd->hscrolled = gd->hsize = 0;
1.1 nicm 1019: }
1020:
1021: /* Write cell data. */
1022: void
1.60 nicm 1023: screen_write_cell(struct screen_write_ctx *ctx, const struct grid_cell *gc)
1.1 nicm 1024: {
1025: struct screen *s = ctx->s;
1026: struct grid *gd = s->grid;
1.15 nicm 1027: struct tty_ctx ttyctx;
1.64 nicm 1028: u_int width, xx, last;
1.92 nicm 1029: u_int sx = screen_size_x(s), sy = screen_size_y(s);
1030: struct grid_line *gl;
1.89 nicm 1031: struct grid_cell tmp_gc, now_gc;
1.92 nicm 1032: struct grid_cell_entry *gce;
1033: int insert, skip, selected, wrapped = 0;
1034:
1035: ctx->cells++;
1.1 nicm 1036:
1037: /* Ignore padding. */
1038: if (gc->flags & GRID_FLAG_PADDING)
1039: return;
1.77 nicm 1040: width = gc->data.width;
1.1 nicm 1041:
1.32 nicm 1042: /*
1043: * If this is a wide character and there is no room on the screen, for
1044: * the entire character, don't print it.
1045: */
1.92 nicm 1046: if (!(s->mode & MODE_WRAP) && (width > 1 &&
1047: (width > sx || (s->cx != sx && s->cx > sx - width))))
1.32 nicm 1048: return;
1049:
1.35 nicm 1050: /*
1051: * If the width is zero, combine onto the previous character, if
1.41 nicm 1052: * there is space.
1.35 nicm 1053: */
1.1 nicm 1054: if (width == 0) {
1.77 nicm 1055: if (screen_write_combine(ctx, &gc->data) == 0) {
1.87 nicm 1056: screen_write_initctx(ctx, &ttyctx);
1.35 nicm 1057: tty_write(tty_cmd_utf8character, &ttyctx);
1.1 nicm 1058: }
1059: return;
1060: }
1061:
1.89 nicm 1062: /* Initialise the redraw context. */
1.87 nicm 1063: screen_write_initctx(ctx, &ttyctx);
1.55 nicm 1064:
1.6 nicm 1065: /* If in insert mode, make space for the cells. */
1.98 nicm 1066: if (s->mode & MODE_INSERT) {
1067: if (s->cx <= sx - width) {
1068: screen_write_flush(ctx);
1069: xx = sx - s->cx - width;
1.99 nicm 1070: grid_view_insert_cells(s->grid, s->cx, s->cy, xx, 8);
1.98 nicm 1071: }
1.6 nicm 1072: insert = 1;
1.64 nicm 1073: } else
1074: insert = 0;
1.89 nicm 1075: skip = !insert;
1.6 nicm 1076:
1.20 nicm 1077: /* Check this will fit on the current line and wrap if not. */
1.92 nicm 1078: if ((s->mode & MODE_WRAP) && s->cx > sx - width) {
1079: screen_write_flush(ctx);
1080: screen_write_save_last(ctx, &ttyctx);
1.34 nicm 1081: screen_write_linefeed(ctx, 1);
1.30 nicm 1082: s->cx = 0; /* carriage return */
1.89 nicm 1083: skip = 0;
1.92 nicm 1084: wrapped = 1;
1.1 nicm 1085: }
1086:
1.64 nicm 1087: /* Sanity check cursor position. */
1.92 nicm 1088: if (s->cx > sx - width || s->cy > sy - 1)
1.1 nicm 1089: return;
1090:
1091: /* Handle overwriting of UTF-8 characters. */
1.92 nicm 1092: gl = &s->grid->linedata[s->grid->hsize + s->cy];
1093: if (gl->flags & GRID_LINE_EXTENDED) {
1094: grid_view_get_cell(gd, s->cx, s->cy, &now_gc);
1095: if (screen_write_overwrite(ctx, &now_gc, width))
1096: skip = 0;
1097: }
1.1 nicm 1098:
1099: /*
1100: * If the new character is UTF-8 wide, fill in padding cells. Have
1101: * already ensured there is enough room.
1102: */
1.89 nicm 1103: for (xx = s->cx + 1; xx < s->cx + width; xx++) {
1.88 nicm 1104: grid_view_set_cell(gd, xx, s->cy, &screen_write_pad_cell);
1.89 nicm 1105: skip = 0;
1106: }
1107:
1108: /* If no change, do not draw. */
1.92 nicm 1109: if (skip) {
1110: if (s->cx >= gl->cellsize)
1111: skip = grid_cells_equal(gc, &grid_default_cell);
1112: else {
1113: gce = &gl->celldata[s->cx];
1114: if (gce->flags & GRID_FLAG_EXTENDED)
1115: skip = 0;
1.95 nicm 1116: else if (gc->flags != gce->flags)
1.92 nicm 1117: skip = 0;
1118: else if (gc->attr != gce->data.attr)
1119: skip = 0;
1120: else if (gc->fg != gce->data.fg)
1121: skip = 0;
1122: else if (gc->bg != gce->data.bg)
1123: skip = 0;
1.95 nicm 1124: else if (gc->data.width != 1)
1125: skip = 0;
1126: else if (gce->data.data != gc->data.data[0])
1.92 nicm 1127: skip = 0;
1128: }
1129: }
1.1 nicm 1130:
1.90 nicm 1131: /* Update the selection the flag and set the cell. */
1132: selected = screen_check_selection(s, s->cx, s->cy);
1133: if (selected && ~gc->flags & GRID_FLAG_SELECTED) {
1134: skip = 0;
1135: memcpy(&tmp_gc, gc, sizeof tmp_gc);
1136: tmp_gc.flags |= GRID_FLAG_SELECTED;
1137: grid_view_set_cell(gd, s->cx, s->cy, &tmp_gc);
1138: } else if (!selected && gc->flags & GRID_FLAG_SELECTED) {
1139: skip = 0;
1140: memcpy(&tmp_gc, gc, sizeof tmp_gc);
1141: tmp_gc.flags &= ~GRID_FLAG_SELECTED;
1142: grid_view_set_cell(gd, s->cx, s->cy, &tmp_gc);
1143: } else if (!skip)
1.89 nicm 1144: grid_view_set_cell(gd, s->cx, s->cy, gc);
1.1 nicm 1145:
1.64 nicm 1146: /*
1147: * Move the cursor. If not wrapping, stick at the last character and
1148: * replace it.
1149: */
1.65 nicm 1150: last = !(s->mode & MODE_WRAP);
1.92 nicm 1151: if (s->cx <= sx - last - width)
1.64 nicm 1152: s->cx += width;
1153: else
1.92 nicm 1154: s->cx = sx - last;
1.1 nicm 1155:
1.89 nicm 1156: /* Create space for character in insert mode. */
1.17 nicm 1157: if (insert) {
1158: ttyctx.num = width;
1159: tty_write(tty_cmd_insertcharacter, &ttyctx);
1160: }
1.89 nicm 1161:
1162: /* Write to the screen. */
1163: if (selected) {
1.92 nicm 1164: screen_write_flush(ctx);
1.97 nicm 1165: screen_select_cell(s, &tmp_gc, gc);
1.33 nicm 1166: ttyctx.cell = &tmp_gc;
1.16 nicm 1167: tty_write(tty_cmd_cell, &ttyctx);
1.92 nicm 1168: ctx->written++;
1.89 nicm 1169: } else if (!skip) {
1.92 nicm 1170: if (wrapped) {
1171: ttyctx.cell = gc;
1172: tty_write(tty_cmd_cell, &ttyctx);
1173: ctx->written++;
1174: } else {
1175: /*
1176: * If wp is NULL, we are not updating the terminal and
1177: * don't care about actually writing the cells
1178: * (tty_write will just return). So don't even bother
1179: * allocating the dirty array.
1180: */
1181: if (ctx->wp != NULL && s->dirty == NULL) {
1182: log_debug("%s: allocating %u bits", __func__,
1183: s->dirtysize);
1184: s->dirty = bit_alloc(s->dirtysize);
1185: }
1186: if (s->dirty != NULL) {
1187: bit_set(s->dirty, screen_dirty_bit(s,
1188: ttyctx.ocx, ttyctx.ocy));
1189: ctx->dirty++;
1190: }
1191: }
1192: } else
1193: ctx->skipped++;
1.35 nicm 1194: }
1195:
1196: /* Combine a UTF-8 zero-width character onto the previous. */
1.87 nicm 1197: static int
1.60 nicm 1198: screen_write_combine(struct screen_write_ctx *ctx, const struct utf8_data *ud)
1.35 nicm 1199: {
1200: struct screen *s = ctx->s;
1201: struct grid *gd = s->grid;
1.77 nicm 1202: struct grid_cell gc;
1.35 nicm 1203:
1204: /* Can't combine if at 0. */
1205: if (s->cx == 0)
1206: return (-1);
1207:
1.60 nicm 1208: /* Empty data is out. */
1209: if (ud->size == 0)
1.37 nicm 1210: fatalx("UTF-8 data empty");
1211:
1.60 nicm 1212: /* Retrieve the previous cell. */
1.77 nicm 1213: grid_view_get_cell(gd, s->cx - 1, s->cy, &gc);
1.35 nicm 1214:
1.60 nicm 1215: /* Check there is enough space. */
1.77 nicm 1216: if (gc.data.size + ud->size > sizeof gc.data.data)
1.60 nicm 1217: return (-1);
1.35 nicm 1218:
1.77 nicm 1219: /* Append the data. */
1220: memcpy(gc.data.data + gc.data.size, ud->data, ud->size);
1221: gc.data.size += ud->size;
1222:
1223: /* Set the new cell. */
1224: grid_view_set_cell(gd, s->cx - 1, s->cy, &gc);
1.35 nicm 1225:
1226: return (0);
1.1 nicm 1227: }
1228:
1229: /*
1230: * UTF-8 wide characters are a bit of an annoyance. They take up more than one
1231: * cell on the screen, so following cells must not be drawn by marking them as
1232: * padding.
1233: *
1234: * So far, so good. The problem is, when overwriting a padding cell, or a UTF-8
1235: * character, it is necessary to also overwrite any other cells which covered
1236: * by the same character.
1237: */
1.89 nicm 1238: static int
1239: screen_write_overwrite(struct screen_write_ctx *ctx, struct grid_cell *gc,
1240: u_int width)
1.1 nicm 1241: {
1242: struct screen *s = ctx->s;
1243: struct grid *gd = s->grid;
1.89 nicm 1244: struct grid_cell tmp_gc;
1.1 nicm 1245: u_int xx;
1.89 nicm 1246: int done = 0;
1.1 nicm 1247:
1.89 nicm 1248: if (gc->flags & GRID_FLAG_PADDING) {
1.1 nicm 1249: /*
1250: * A padding cell, so clear any following and leading padding
1251: * cells back to the character. Don't overwrite the current
1252: * cell as that happens later anyway.
1253: */
1254: xx = s->cx + 1;
1255: while (--xx > 0) {
1.89 nicm 1256: grid_view_get_cell(gd, xx, s->cy, &tmp_gc);
1257: if (~tmp_gc.flags & GRID_FLAG_PADDING)
1.1 nicm 1258: break;
1259: grid_view_set_cell(gd, xx, s->cy, &grid_default_cell);
1260: }
1261:
1262: /* Overwrite the character at the start of this padding. */
1263: grid_view_set_cell(gd, xx, s->cy, &grid_default_cell);
1.89 nicm 1264: done = 1;
1.43 nicm 1265: }
1.1 nicm 1266:
1.43 nicm 1267: /*
1.95 nicm 1268: * Overwrite any padding cells that belong to any UTF-8 characters
1269: * we'll be overwriting with the current character.
1.43 nicm 1270: */
1.95 nicm 1271: if (width != 1 ||
1272: gc->data.width != 1 ||
1273: gc->flags & GRID_FLAG_PADDING) {
1.89 nicm 1274: xx = s->cx + width - 1;
1275: while (++xx < screen_size_x(s)) {
1276: grid_view_get_cell(gd, xx, s->cy, &tmp_gc);
1277: if (~tmp_gc.flags & GRID_FLAG_PADDING)
1278: break;
1279: grid_view_set_cell(gd, xx, s->cy, &grid_default_cell);
1280: done = 1;
1281: }
1.1 nicm 1282: }
1.89 nicm 1283:
1284: return (done);
1.50 nicm 1285: }
1286:
1287: void
1288: screen_write_setselection(struct screen_write_ctx *ctx, u_char *str, u_int len)
1289: {
1290: struct tty_ctx ttyctx;
1291:
1.87 nicm 1292: screen_write_initctx(ctx, &ttyctx);
1.50 nicm 1293: ttyctx.ptr = str;
1294: ttyctx.num = len;
1295:
1296: tty_write(tty_cmd_setselection, &ttyctx);
1.47 nicm 1297: }
1298:
1299: void
1300: screen_write_rawstring(struct screen_write_ctx *ctx, u_char *str, u_int len)
1301: {
1.87 nicm 1302: struct tty_ctx ttyctx;
1.47 nicm 1303:
1.87 nicm 1304: screen_write_initctx(ctx, &ttyctx);
1.47 nicm 1305: ttyctx.ptr = str;
1306: ttyctx.num = len;
1307:
1308: tty_write(tty_cmd_rawstring, &ttyctx);
1.1 nicm 1309: }
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