1 /* $OpenBSD: screen-write.c,v 1.191 2021/01/22 11:28:33 nicm Exp $ */ 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_collect_clear(struct screen_write_ctx *, u_int, 27 u_int); 28 static void screen_write_collect_clear_end(struct screen_write_ctx *, u_int, 29 u_int); 30 static void screen_write_collect_clear_start(struct screen_write_ctx *, 31 u_int, u_int); 32 static void screen_write_collect_scroll(struct screen_write_ctx *); 33 static void screen_write_collect_flush(struct screen_write_ctx *, int, 34 const char *); 35 36 static int screen_write_overwrite(struct screen_write_ctx *, 37 struct grid_cell *, u_int); 38 static const struct grid_cell *screen_write_combine(struct screen_write_ctx *, 39 const struct utf8_data *, u_int *); 40 41 struct screen_write_collect_item { 42 u_int x; 43 int wrapped; 44 45 enum { TEXT, CLEAR_END, CLEAR_START } type; 46 u_int used; 47 u_int bg; 48 49 struct grid_cell gc; 50 51 TAILQ_ENTRY(screen_write_collect_item) entry; 52 }; 53 struct screen_write_collect_line { 54 u_int bg; 55 char *data; 56 TAILQ_HEAD(, screen_write_collect_item) items; 57 }; 58 59 static void 60 screen_write_offset_timer(__unused int fd, __unused short events, void *data) 61 { 62 struct window *w = data; 63 64 tty_update_window_offset(w); 65 } 66 67 /* Set cursor position. */ 68 static void 69 screen_write_set_cursor(struct screen_write_ctx *ctx, int cx, int cy) 70 { 71 struct window_pane *wp = ctx->wp; 72 struct window *w; 73 struct screen *s = ctx->s; 74 struct timeval tv = { .tv_usec = 10000 }; 75 76 if (cx != -1 && (u_int)cx == s->cx && cy != -1 && (u_int)cy == s->cy) 77 return; 78 79 if (cx != -1) { 80 if ((u_int)cx > screen_size_x(s)) /* allow last column */ 81 cx = screen_size_x(s) - 1; 82 s->cx = cx; 83 } 84 if (cy != -1) { 85 if ((u_int)cy > screen_size_y(s) - 1) 86 cy = screen_size_y(s) - 1; 87 s->cy = cy; 88 } 89 90 if (wp == NULL) 91 return; 92 w = wp->window; 93 94 if (!event_initialized(&w->offset_timer)) 95 evtimer_set(&w->offset_timer, screen_write_offset_timer, w); 96 if (!evtimer_pending(&w->offset_timer, NULL)) 97 evtimer_add(&w->offset_timer, &tv); 98 } 99 100 /* Do a full redraw. */ 101 static void 102 screen_write_redraw_cb(const struct tty_ctx *ttyctx) 103 { 104 struct window_pane *wp = ttyctx->arg; 105 106 if (wp != NULL) 107 wp->flags |= PANE_REDRAW; 108 } 109 110 /* Update context for client. */ 111 static int 112 screen_write_set_client_cb(struct tty_ctx *ttyctx, struct client *c) 113 { 114 struct window_pane *wp = ttyctx->arg; 115 116 if (c->session->curw->window != wp->window) 117 return (0); 118 if (wp->layout_cell == NULL) 119 return (0); 120 121 if (wp->flags & (PANE_REDRAW|PANE_DROP)) 122 return (-1); 123 if (c->flags & CLIENT_REDRAWPANES) { 124 /* 125 * Redraw is already deferred to redraw another pane - redraw 126 * this one also when that happens. 127 */ 128 log_debug("adding %%%u to deferred redraw", wp->id); 129 wp->flags |= PANE_REDRAW; 130 return (-1); 131 } 132 133 ttyctx->bigger = tty_window_offset(&c->tty, &ttyctx->wox, &ttyctx->woy, 134 &ttyctx->wsx, &ttyctx->wsy); 135 136 ttyctx->xoff = ttyctx->rxoff = wp->xoff; 137 ttyctx->yoff = ttyctx->ryoff = wp->yoff; 138 139 if (status_at_line(c) == 0) 140 ttyctx->yoff += status_line_size(c); 141 142 return (1); 143 } 144 145 /* Set up context for TTY command. */ 146 static void 147 screen_write_initctx(struct screen_write_ctx *ctx, struct tty_ctx *ttyctx, 148 int sync) 149 { 150 struct screen *s = ctx->s; 151 152 memset(ttyctx, 0, sizeof *ttyctx); 153 154 if (ctx->wp != NULL) { 155 tty_default_colours(&ttyctx->defaults, ctx->wp); 156 ttyctx->palette = ctx->wp->palette; 157 } else { 158 memcpy(&ttyctx->defaults, &grid_default_cell, 159 sizeof ttyctx->defaults); 160 ttyctx->palette = NULL; 161 } 162 163 ttyctx->s = s; 164 ttyctx->sx = screen_size_x(s); 165 ttyctx->sy = screen_size_y(s); 166 167 ttyctx->ocx = s->cx; 168 ttyctx->ocy = s->cy; 169 ttyctx->orlower = s->rlower; 170 ttyctx->orupper = s->rupper; 171 172 if (ctx->init_ctx_cb != NULL) 173 ctx->init_ctx_cb(ctx, ttyctx); 174 else { 175 ttyctx->redraw_cb = screen_write_redraw_cb; 176 if (ctx->wp == NULL) 177 ttyctx->set_client_cb = NULL; 178 else 179 ttyctx->set_client_cb = screen_write_set_client_cb; 180 ttyctx->arg = ctx->wp; 181 } 182 183 if (ctx->wp != NULL && 184 (~ctx->flags & SCREEN_WRITE_SYNC) && 185 (sync || ctx->wp != ctx->wp->window->active)) { 186 tty_write(tty_cmd_syncstart, ttyctx); 187 ctx->flags |= SCREEN_WRITE_SYNC; 188 } 189 } 190 191 /* Make write list. */ 192 void 193 screen_write_make_list(struct screen *s) 194 { 195 u_int y; 196 197 s->write_list = xcalloc(screen_size_y(s), sizeof *s->write_list); 198 for (y = 0; y < screen_size_y(s); y++) 199 TAILQ_INIT(&s->write_list[y].items); 200 } 201 202 /* Free write list. */ 203 void 204 screen_write_free_list(struct screen *s) 205 { 206 u_int y; 207 208 for (y = 0; y < screen_size_y(s); y++) 209 free(s->write_list[y].data); 210 free(s->write_list); 211 } 212 213 /* Set up for writing. */ 214 static void 215 screen_write_init(struct screen_write_ctx *ctx, struct screen *s) 216 { 217 memset(ctx, 0, sizeof *ctx); 218 219 ctx->s = s; 220 221 if (ctx->s->write_list == NULL) 222 screen_write_make_list(ctx->s); 223 ctx->item = xcalloc(1, sizeof *ctx->item); 224 225 ctx->scrolled = 0; 226 ctx->bg = 8; 227 } 228 229 /* Initialize writing with a pane. */ 230 void 231 screen_write_start_pane(struct screen_write_ctx *ctx, struct window_pane *wp, 232 struct screen *s) 233 { 234 if (s == NULL) 235 s = wp->screen; 236 screen_write_init(ctx, s); 237 ctx->wp = wp; 238 239 if (log_get_level() != 0) { 240 log_debug("%s: size %ux%u, pane %%%u (at %u,%u)", 241 __func__, screen_size_x(ctx->s), screen_size_y(ctx->s), 242 wp->id, wp->xoff, wp->yoff); 243 } 244 } 245 246 /* Initialize writing with a callback. */ 247 void 248 screen_write_start_callback(struct screen_write_ctx *ctx, struct screen *s, 249 screen_write_init_ctx_cb cb, void *arg) 250 { 251 screen_write_init(ctx, s); 252 253 ctx->init_ctx_cb = cb; 254 ctx->arg = arg; 255 256 if (log_get_level() != 0) { 257 log_debug("%s: size %ux%u, with callback", __func__, 258 screen_size_x(ctx->s), screen_size_y(ctx->s)); 259 } 260 } 261 262 /* Initialize writing. */ 263 void 264 screen_write_start(struct screen_write_ctx *ctx, struct screen *s) 265 { 266 screen_write_init(ctx, s); 267 268 if (log_get_level() != 0) { 269 log_debug("%s: size %ux%u, no pane", __func__, 270 screen_size_x(ctx->s), screen_size_y(ctx->s)); 271 } 272 } 273 274 /* Finish writing. */ 275 void 276 screen_write_stop(struct screen_write_ctx *ctx) 277 { 278 screen_write_collect_end(ctx); 279 screen_write_collect_flush(ctx, 0, __func__); 280 281 log_debug("%s: %u cells (%u written, %u skipped)", __func__, 282 ctx->cells, ctx->written, ctx->skipped); 283 if (ctx->wp != NULL) { 284 ctx->wp->written += ctx->written; 285 ctx->wp->skipped += ctx->skipped; 286 } 287 288 free(ctx->item); 289 } 290 291 /* Reset screen state. */ 292 void 293 screen_write_reset(struct screen_write_ctx *ctx) 294 { 295 struct screen *s = ctx->s; 296 297 screen_reset_tabs(s); 298 screen_write_scrollregion(ctx, 0, screen_size_y(s) - 1); 299 300 s->mode = MODE_CURSOR | MODE_WRAP; 301 302 screen_write_clearscreen(ctx, 8); 303 screen_write_set_cursor(ctx, 0, 0); 304 } 305 306 /* Write character. */ 307 void 308 screen_write_putc(struct screen_write_ctx *ctx, const struct grid_cell *gcp, 309 u_char ch) 310 { 311 struct grid_cell gc; 312 313 memcpy(&gc, gcp, sizeof gc); 314 315 utf8_set(&gc.data, ch); 316 screen_write_cell(ctx, &gc); 317 } 318 319 /* Calculate string length. */ 320 size_t 321 screen_write_strlen(const char *fmt, ...) 322 { 323 va_list ap; 324 char *msg; 325 struct utf8_data ud; 326 u_char *ptr; 327 size_t left, size = 0; 328 enum utf8_state more; 329 330 va_start(ap, fmt); 331 xvasprintf(&msg, fmt, ap); 332 va_end(ap); 333 334 ptr = msg; 335 while (*ptr != '\0') { 336 if (*ptr > 0x7f && utf8_open(&ud, *ptr) == UTF8_MORE) { 337 ptr++; 338 339 left = strlen(ptr); 340 if (left < (size_t)ud.size - 1) 341 break; 342 while ((more = utf8_append(&ud, *ptr)) == UTF8_MORE) 343 ptr++; 344 ptr++; 345 346 if (more == UTF8_DONE) 347 size += ud.width; 348 } else { 349 if (*ptr > 0x1f && *ptr < 0x7f) 350 size++; 351 ptr++; 352 } 353 } 354 355 free(msg); 356 return (size); 357 } 358 359 /* Write string wrapped over lines. */ 360 int 361 screen_write_text(struct screen_write_ctx *ctx, u_int cx, u_int width, 362 u_int lines, int more, const struct grid_cell *gcp, const char *fmt, ...) 363 { 364 struct screen *s = ctx->s; 365 va_list ap; 366 char *tmp; 367 u_int cy = s->cy, i, end, next, idx = 0, at, left; 368 struct utf8_data *text; 369 struct grid_cell gc; 370 371 memcpy(&gc, gcp, sizeof gc); 372 373 va_start(ap, fmt); 374 xvasprintf(&tmp, fmt, ap); 375 va_end(ap); 376 377 text = utf8_fromcstr(tmp); 378 free(tmp); 379 380 left = (cx + width) - s->cx; 381 for (;;) { 382 /* Find the end of what can fit on the line. */ 383 at = 0; 384 for (end = idx; text[end].size != 0; end++) { 385 if (text[end].size == 1 && text[end].data[0] == '\n') 386 break; 387 if (at + text[end].width > left) 388 break; 389 at += text[end].width; 390 } 391 392 /* 393 * If we're on a space, that's the end. If not, walk back to 394 * try and find one. 395 */ 396 if (text[end].size == 0) 397 next = end; 398 else if (text[end].size == 1 && text[end].data[0] == '\n') 399 next = end + 1; 400 else if (text[end].size == 1 && text[end].data[0] == ' ') 401 next = end + 1; 402 else { 403 for (i = end; i > idx; i--) { 404 if (text[i].size == 1 && text[i].data[0] == ' ') 405 break; 406 } 407 if (i != idx) { 408 next = i + 1; 409 end = i; 410 } else 411 next = end; 412 } 413 414 /* Print the line. */ 415 for (i = idx; i < end; i++) { 416 utf8_copy(&gc.data, &text[i]); 417 screen_write_cell(ctx, &gc); 418 } 419 420 /* If at the bottom, stop. */ 421 idx = next; 422 if (s->cy == cy + lines - 1 || text[idx].size == 0) 423 break; 424 425 screen_write_cursormove(ctx, cx, s->cy + 1, 0); 426 left = width; 427 } 428 429 /* 430 * Fail if on the last line and there is more to come or at the end, or 431 * if the text was not entirely consumed. 432 */ 433 if ((s->cy == cy + lines - 1 && (!more || s->cx == cx + width)) || 434 text[idx].size != 0) { 435 free(text); 436 return (0); 437 } 438 free(text); 439 440 /* 441 * If no more to come, move to the next line. Otherwise, leave on 442 * the same line (except if at the end). 443 */ 444 if (!more || s->cx == cx + width) 445 screen_write_cursormove(ctx, cx, s->cy + 1, 0); 446 return (1); 447 } 448 449 /* Write simple string (no maximum length). */ 450 void 451 screen_write_puts(struct screen_write_ctx *ctx, const struct grid_cell *gcp, 452 const char *fmt, ...) 453 { 454 va_list ap; 455 456 va_start(ap, fmt); 457 screen_write_vnputs(ctx, -1, gcp, fmt, ap); 458 va_end(ap); 459 } 460 461 /* Write string with length limit (-1 for unlimited). */ 462 void 463 screen_write_nputs(struct screen_write_ctx *ctx, ssize_t maxlen, 464 const struct grid_cell *gcp, const char *fmt, ...) 465 { 466 va_list ap; 467 468 va_start(ap, fmt); 469 screen_write_vnputs(ctx, maxlen, gcp, fmt, ap); 470 va_end(ap); 471 } 472 473 void 474 screen_write_vnputs(struct screen_write_ctx *ctx, ssize_t maxlen, 475 const struct grid_cell *gcp, const char *fmt, va_list ap) 476 { 477 struct grid_cell gc; 478 struct utf8_data *ud = &gc.data; 479 char *msg; 480 u_char *ptr; 481 size_t left, size = 0; 482 enum utf8_state more; 483 484 memcpy(&gc, gcp, sizeof gc); 485 xvasprintf(&msg, fmt, ap); 486 487 ptr = msg; 488 while (*ptr != '\0') { 489 if (*ptr > 0x7f && utf8_open(ud, *ptr) == UTF8_MORE) { 490 ptr++; 491 492 left = strlen(ptr); 493 if (left < (size_t)ud->size - 1) 494 break; 495 while ((more = utf8_append(ud, *ptr)) == UTF8_MORE) 496 ptr++; 497 ptr++; 498 499 if (more != UTF8_DONE) 500 continue; 501 if (maxlen > 0 && size + ud->width > (size_t)maxlen) { 502 while (size < (size_t)maxlen) { 503 screen_write_putc(ctx, &gc, ' '); 504 size++; 505 } 506 break; 507 } 508 size += ud->width; 509 screen_write_cell(ctx, &gc); 510 } else { 511 if (maxlen > 0 && size + 1 > (size_t)maxlen) 512 break; 513 514 if (*ptr == '\001') 515 gc.attr ^= GRID_ATTR_CHARSET; 516 else if (*ptr == '\n') { 517 screen_write_linefeed(ctx, 0, 8); 518 screen_write_carriagereturn(ctx); 519 } else if (*ptr > 0x1f && *ptr < 0x7f) { 520 size++; 521 screen_write_putc(ctx, &gc, *ptr); 522 } 523 ptr++; 524 } 525 } 526 527 free(msg); 528 } 529 530 /* 531 * Copy from another screen but without the selection stuff. Assumes the target 532 * region is already big enough. 533 */ 534 void 535 screen_write_fast_copy(struct screen_write_ctx *ctx, struct screen *src, 536 u_int px, u_int py, u_int nx, u_int ny) 537 { 538 struct screen *s = ctx->s; 539 struct grid *gd = src->grid; 540 struct grid_cell gc; 541 u_int xx, yy, cx, cy; 542 543 if (nx == 0 || ny == 0) 544 return; 545 546 cy = s->cy; 547 for (yy = py; yy < py + ny; yy++) { 548 if (yy >= gd->hsize + gd->sy) 549 break; 550 cx = s->cx; 551 for (xx = px; xx < px + nx; xx++) { 552 if (xx >= grid_get_line(gd, yy)->cellsize) 553 break; 554 grid_get_cell(gd, xx, yy, &gc); 555 if (xx + gc.data.width > px + nx) 556 break; 557 grid_view_set_cell(ctx->s->grid, cx, cy, &gc); 558 cx++; 559 } 560 cy++; 561 } 562 } 563 564 /* Draw a horizontal line on screen. */ 565 void 566 screen_write_hline(struct screen_write_ctx *ctx, u_int nx, int left, int right) 567 { 568 struct screen *s = ctx->s; 569 struct grid_cell gc; 570 u_int cx, cy, i; 571 572 cx = s->cx; 573 cy = s->cy; 574 575 memcpy(&gc, &grid_default_cell, sizeof gc); 576 gc.attr |= GRID_ATTR_CHARSET; 577 578 screen_write_putc(ctx, &gc, left ? 't' : 'q'); 579 for (i = 1; i < nx - 1; i++) 580 screen_write_putc(ctx, &gc, 'q'); 581 screen_write_putc(ctx, &gc, right ? 'u' : 'q'); 582 583 screen_write_set_cursor(ctx, cx, cy); 584 } 585 586 /* Draw a horizontal line on screen. */ 587 void 588 screen_write_vline(struct screen_write_ctx *ctx, u_int ny, int top, int bottom) 589 { 590 struct screen *s = ctx->s; 591 struct grid_cell gc; 592 u_int cx, cy, i; 593 594 cx = s->cx; 595 cy = s->cy; 596 597 memcpy(&gc, &grid_default_cell, sizeof gc); 598 gc.attr |= GRID_ATTR_CHARSET; 599 600 screen_write_putc(ctx, &gc, top ? 'w' : 'x'); 601 for (i = 1; i < ny - 1; i++) { 602 screen_write_set_cursor(ctx, cx, cy + i); 603 screen_write_putc(ctx, &gc, 'x'); 604 } 605 screen_write_set_cursor(ctx, cx, cy + ny - 1); 606 screen_write_putc(ctx, &gc, bottom ? 'v' : 'x'); 607 608 screen_write_set_cursor(ctx, cx, cy); 609 } 610 611 /* Draw a menu on screen. */ 612 void 613 screen_write_menu(struct screen_write_ctx *ctx, struct menu *menu, 614 int choice, const struct grid_cell *choice_gc) 615 { 616 struct screen *s = ctx->s; 617 struct grid_cell default_gc; 618 const struct grid_cell *gc = &default_gc; 619 u_int cx, cy, i, j; 620 const char *name; 621 622 cx = s->cx; 623 cy = s->cy; 624 625 memcpy(&default_gc, &grid_default_cell, sizeof default_gc); 626 627 screen_write_box(ctx, menu->width + 4, menu->count + 2); 628 screen_write_cursormove(ctx, cx + 2, cy, 0); 629 format_draw(ctx, &default_gc, menu->width, menu->title, NULL); 630 631 for (i = 0; i < menu->count; i++) { 632 name = menu->items[i].name; 633 if (name == NULL) { 634 screen_write_cursormove(ctx, cx, cy + 1 + i, 0); 635 screen_write_hline(ctx, menu->width + 4, 1, 1); 636 } else { 637 if (choice >= 0 && i == (u_int)choice && *name != '-') 638 gc = choice_gc; 639 screen_write_cursormove(ctx, cx + 2, cy + 1 + i, 0); 640 for (j = 0; j < menu->width; j++) 641 screen_write_putc(ctx, gc, ' '); 642 screen_write_cursormove(ctx, cx + 2, cy + 1 + i, 0); 643 if (*name == '-') { 644 name++; 645 default_gc.attr |= GRID_ATTR_DIM; 646 format_draw(ctx, gc, menu->width, name, NULL); 647 default_gc.attr &= ~GRID_ATTR_DIM; 648 } else 649 format_draw(ctx, gc, menu->width, name, NULL); 650 gc = &default_gc; 651 } 652 } 653 654 screen_write_set_cursor(ctx, cx, cy); 655 } 656 657 /* Draw a box on screen. */ 658 void 659 screen_write_box(struct screen_write_ctx *ctx, u_int nx, u_int ny) 660 { 661 struct screen *s = ctx->s; 662 struct grid_cell gc; 663 u_int cx, cy, i; 664 665 cx = s->cx; 666 cy = s->cy; 667 668 memcpy(&gc, &grid_default_cell, sizeof gc); 669 gc.attr |= GRID_ATTR_CHARSET; 670 671 screen_write_putc(ctx, &gc, 'l'); 672 for (i = 1; i < nx - 1; i++) 673 screen_write_putc(ctx, &gc, 'q'); 674 screen_write_putc(ctx, &gc, 'k'); 675 676 screen_write_set_cursor(ctx, cx, cy + ny - 1); 677 screen_write_putc(ctx, &gc, 'm'); 678 for (i = 1; i < nx - 1; i++) 679 screen_write_putc(ctx, &gc, 'q'); 680 screen_write_putc(ctx, &gc, 'j'); 681 682 for (i = 1; i < ny - 1; i++) { 683 screen_write_set_cursor(ctx, cx, cy + i); 684 screen_write_putc(ctx, &gc, 'x'); 685 } 686 for (i = 1; i < ny - 1; i++) { 687 screen_write_set_cursor(ctx, cx + nx - 1, cy + i); 688 screen_write_putc(ctx, &gc, 'x'); 689 } 690 691 screen_write_set_cursor(ctx, cx, cy); 692 } 693 694 /* 695 * Write a preview version of a window. Assumes target area is big enough and 696 * already cleared. 697 */ 698 void 699 screen_write_preview(struct screen_write_ctx *ctx, struct screen *src, u_int nx, 700 u_int ny) 701 { 702 struct screen *s = ctx->s; 703 struct grid_cell gc; 704 u_int cx, cy, px, py; 705 706 cx = s->cx; 707 cy = s->cy; 708 709 /* 710 * If the cursor is on, pick the area around the cursor, otherwise use 711 * the top left. 712 */ 713 if (src->mode & MODE_CURSOR) { 714 px = src->cx; 715 if (px < nx / 3) 716 px = 0; 717 else 718 px = px - nx / 3; 719 if (px + nx > screen_size_x(src)) { 720 if (nx > screen_size_x(src)) 721 px = 0; 722 else 723 px = screen_size_x(src) - nx; 724 } 725 py = src->cy; 726 if (py < ny / 3) 727 py = 0; 728 else 729 py = py - ny / 3; 730 if (py + ny > screen_size_y(src)) { 731 if (ny > screen_size_y(src)) 732 py = 0; 733 else 734 py = screen_size_y(src) - ny; 735 } 736 } else { 737 px = 0; 738 py = 0; 739 } 740 741 screen_write_fast_copy(ctx, src, px, src->grid->hsize + py, nx, ny); 742 743 if (src->mode & MODE_CURSOR) { 744 grid_view_get_cell(src->grid, src->cx, src->cy, &gc); 745 gc.attr |= GRID_ATTR_REVERSE; 746 screen_write_set_cursor(ctx, cx + (src->cx - px), 747 cy + (src->cy - py)); 748 screen_write_cell(ctx, &gc); 749 } 750 } 751 752 /* Set a mode. */ 753 void 754 screen_write_mode_set(struct screen_write_ctx *ctx, int mode) 755 { 756 struct screen *s = ctx->s; 757 758 s->mode |= mode; 759 } 760 761 /* Clear a mode. */ 762 void 763 screen_write_mode_clear(struct screen_write_ctx *ctx, int mode) 764 { 765 struct screen *s = ctx->s; 766 767 s->mode &= ~mode; 768 } 769 770 /* Cursor up by ny. */ 771 void 772 screen_write_cursorup(struct screen_write_ctx *ctx, u_int ny) 773 { 774 struct screen *s = ctx->s; 775 u_int cx = s->cx, cy = s->cy; 776 777 if (ny == 0) 778 ny = 1; 779 780 if (cy < s->rupper) { 781 /* Above region. */ 782 if (ny > cy) 783 ny = cy; 784 } else { 785 /* Below region. */ 786 if (ny > cy - s->rupper) 787 ny = cy - s->rupper; 788 } 789 if (cx == screen_size_x(s)) 790 cx--; 791 792 cy -= ny; 793 794 screen_write_set_cursor(ctx, cx, cy); 795 } 796 797 /* Cursor down by ny. */ 798 void 799 screen_write_cursordown(struct screen_write_ctx *ctx, u_int ny) 800 { 801 struct screen *s = ctx->s; 802 u_int cx = s->cx, cy = s->cy; 803 804 if (ny == 0) 805 ny = 1; 806 807 if (cy > s->rlower) { 808 /* Below region. */ 809 if (ny > screen_size_y(s) - 1 - cy) 810 ny = screen_size_y(s) - 1 - cy; 811 } else { 812 /* Above region. */ 813 if (ny > s->rlower - cy) 814 ny = s->rlower - cy; 815 } 816 if (cx == screen_size_x(s)) 817 cx--; 818 else if (ny == 0) 819 return; 820 821 cy += ny; 822 823 screen_write_set_cursor(ctx, cx, cy); 824 } 825 826 /* Cursor right by nx. */ 827 void 828 screen_write_cursorright(struct screen_write_ctx *ctx, u_int nx) 829 { 830 struct screen *s = ctx->s; 831 u_int cx = s->cx, cy = s->cy; 832 833 if (nx == 0) 834 nx = 1; 835 836 if (nx > screen_size_x(s) - 1 - cx) 837 nx = screen_size_x(s) - 1 - cx; 838 if (nx == 0) 839 return; 840 841 cx += nx; 842 843 screen_write_set_cursor(ctx, cx, cy); 844 } 845 846 /* Cursor left by nx. */ 847 void 848 screen_write_cursorleft(struct screen_write_ctx *ctx, u_int nx) 849 { 850 struct screen *s = ctx->s; 851 u_int cx = s->cx, cy = s->cy; 852 853 if (nx == 0) 854 nx = 1; 855 856 if (nx > cx) 857 nx = cx; 858 if (nx == 0) 859 return; 860 861 cx -= nx; 862 863 screen_write_set_cursor(ctx, cx, cy); 864 } 865 866 /* Backspace; cursor left unless at start of wrapped line when can move up. */ 867 void 868 screen_write_backspace(struct screen_write_ctx *ctx) 869 { 870 struct screen *s = ctx->s; 871 struct grid_line *gl; 872 u_int cx = s->cx, cy = s->cy; 873 874 if (cx == 0) { 875 if (cy == 0) 876 return; 877 gl = grid_get_line(s->grid, s->grid->hsize + cy - 1); 878 if (gl->flags & GRID_LINE_WRAPPED) { 879 cy--; 880 cx = screen_size_x(s) - 1; 881 } 882 } else 883 cx--; 884 885 screen_write_set_cursor(ctx, cx, cy); 886 } 887 888 /* VT100 alignment test. */ 889 void 890 screen_write_alignmenttest(struct screen_write_ctx *ctx) 891 { 892 struct screen *s = ctx->s; 893 struct tty_ctx ttyctx; 894 struct grid_cell gc; 895 u_int xx, yy; 896 897 memcpy(&gc, &grid_default_cell, sizeof gc); 898 utf8_set(&gc.data, 'E'); 899 900 for (yy = 0; yy < screen_size_y(s); yy++) { 901 for (xx = 0; xx < screen_size_x(s); xx++) 902 grid_view_set_cell(s->grid, xx, yy, &gc); 903 } 904 905 screen_write_set_cursor(ctx, 0, 0); 906 907 s->rupper = 0; 908 s->rlower = screen_size_y(s) - 1; 909 910 screen_write_initctx(ctx, &ttyctx, 1); 911 912 screen_write_collect_clear(ctx, 0, screen_size_y(s) - 1); 913 tty_write(tty_cmd_alignmenttest, &ttyctx); 914 } 915 916 /* Insert nx characters. */ 917 void 918 screen_write_insertcharacter(struct screen_write_ctx *ctx, u_int nx, u_int bg) 919 { 920 struct screen *s = ctx->s; 921 struct tty_ctx ttyctx; 922 923 if (nx == 0) 924 nx = 1; 925 926 if (nx > screen_size_x(s) - s->cx) 927 nx = screen_size_x(s) - s->cx; 928 if (nx == 0) 929 return; 930 931 if (s->cx > screen_size_x(s) - 1) 932 return; 933 934 screen_write_initctx(ctx, &ttyctx, 0); 935 ttyctx.bg = bg; 936 937 grid_view_insert_cells(s->grid, s->cx, s->cy, nx, bg); 938 939 screen_write_collect_flush(ctx, 0, __func__); 940 ttyctx.num = nx; 941 tty_write(tty_cmd_insertcharacter, &ttyctx); 942 } 943 944 /* Delete nx characters. */ 945 void 946 screen_write_deletecharacter(struct screen_write_ctx *ctx, u_int nx, u_int bg) 947 { 948 struct screen *s = ctx->s; 949 struct tty_ctx ttyctx; 950 951 if (nx == 0) 952 nx = 1; 953 954 if (nx > screen_size_x(s) - s->cx) 955 nx = screen_size_x(s) - s->cx; 956 if (nx == 0) 957 return; 958 959 if (s->cx > screen_size_x(s) - 1) 960 return; 961 962 screen_write_initctx(ctx, &ttyctx, 0); 963 ttyctx.bg = bg; 964 965 grid_view_delete_cells(s->grid, s->cx, s->cy, nx, bg); 966 967 screen_write_collect_flush(ctx, 0, __func__); 968 ttyctx.num = nx; 969 tty_write(tty_cmd_deletecharacter, &ttyctx); 970 } 971 972 /* Clear nx characters. */ 973 void 974 screen_write_clearcharacter(struct screen_write_ctx *ctx, u_int nx, u_int bg) 975 { 976 struct screen *s = ctx->s; 977 struct tty_ctx ttyctx; 978 979 if (nx == 0) 980 nx = 1; 981 982 if (nx > screen_size_x(s) - s->cx) 983 nx = screen_size_x(s) - s->cx; 984 if (nx == 0) 985 return; 986 987 if (s->cx > screen_size_x(s) - 1) 988 return; 989 990 screen_write_initctx(ctx, &ttyctx, 0); 991 ttyctx.bg = bg; 992 993 grid_view_clear(s->grid, s->cx, s->cy, nx, 1, bg); 994 995 screen_write_collect_flush(ctx, 0, __func__); 996 ttyctx.num = nx; 997 tty_write(tty_cmd_clearcharacter, &ttyctx); 998 } 999 1000 /* Insert ny lines. */ 1001 void 1002 screen_write_insertline(struct screen_write_ctx *ctx, u_int ny, u_int bg) 1003 { 1004 struct screen *s = ctx->s; 1005 struct grid *gd = s->grid; 1006 struct tty_ctx ttyctx; 1007 1008 if (ny == 0) 1009 ny = 1; 1010 1011 if (s->cy < s->rupper || s->cy > s->rlower) { 1012 if (ny > screen_size_y(s) - s->cy) 1013 ny = screen_size_y(s) - s->cy; 1014 if (ny == 0) 1015 return; 1016 1017 screen_write_initctx(ctx, &ttyctx, 1); 1018 ttyctx.bg = bg; 1019 1020 grid_view_insert_lines(gd, s->cy, ny, bg); 1021 1022 screen_write_collect_flush(ctx, 0, __func__); 1023 ttyctx.num = ny; 1024 tty_write(tty_cmd_insertline, &ttyctx); 1025 return; 1026 } 1027 1028 if (ny > s->rlower + 1 - s->cy) 1029 ny = s->rlower + 1 - s->cy; 1030 if (ny == 0) 1031 return; 1032 1033 screen_write_initctx(ctx, &ttyctx, 1); 1034 ttyctx.bg = bg; 1035 1036 if (s->cy < s->rupper || s->cy > s->rlower) 1037 grid_view_insert_lines(gd, s->cy, ny, bg); 1038 else 1039 grid_view_insert_lines_region(gd, s->rlower, s->cy, ny, bg); 1040 1041 screen_write_collect_flush(ctx, 0, __func__); 1042 1043 ttyctx.num = ny; 1044 tty_write(tty_cmd_insertline, &ttyctx); 1045 } 1046 1047 /* Delete ny lines. */ 1048 void 1049 screen_write_deleteline(struct screen_write_ctx *ctx, u_int ny, u_int bg) 1050 { 1051 struct screen *s = ctx->s; 1052 struct grid *gd = s->grid; 1053 struct tty_ctx ttyctx; 1054 1055 if (ny == 0) 1056 ny = 1; 1057 1058 if (s->cy < s->rupper || s->cy > s->rlower) { 1059 if (ny > screen_size_y(s) - s->cy) 1060 ny = screen_size_y(s) - s->cy; 1061 if (ny == 0) 1062 return; 1063 1064 screen_write_initctx(ctx, &ttyctx, 1); 1065 ttyctx.bg = bg; 1066 1067 grid_view_delete_lines(gd, s->cy, ny, bg); 1068 1069 screen_write_collect_flush(ctx, 0, __func__); 1070 ttyctx.num = ny; 1071 tty_write(tty_cmd_deleteline, &ttyctx); 1072 return; 1073 } 1074 1075 if (ny > s->rlower + 1 - s->cy) 1076 ny = s->rlower + 1 - s->cy; 1077 if (ny == 0) 1078 return; 1079 1080 screen_write_initctx(ctx, &ttyctx, 1); 1081 ttyctx.bg = bg; 1082 1083 if (s->cy < s->rupper || s->cy > s->rlower) 1084 grid_view_delete_lines(gd, s->cy, ny, bg); 1085 else 1086 grid_view_delete_lines_region(gd, s->rlower, s->cy, ny, bg); 1087 1088 screen_write_collect_flush(ctx, 0, __func__); 1089 ttyctx.num = ny; 1090 tty_write(tty_cmd_deleteline, &ttyctx); 1091 } 1092 1093 /* Clear line at cursor. */ 1094 void 1095 screen_write_clearline(struct screen_write_ctx *ctx, u_int bg) 1096 { 1097 struct screen *s = ctx->s; 1098 struct grid_line *gl; 1099 u_int sx = screen_size_x(s); 1100 1101 gl = grid_get_line(s->grid, s->grid->hsize + s->cy); 1102 if (gl->cellsize == 0 && COLOUR_DEFAULT(bg)) 1103 return; 1104 1105 grid_view_clear(s->grid, 0, s->cy, sx, 1, bg); 1106 1107 screen_write_collect_clear(ctx, s->cy, 1); 1108 ctx->s->write_list[s->cy].bg = 1 + bg; 1109 ctx->item->used = 0; 1110 } 1111 1112 /* Clear to end of line from cursor. */ 1113 void 1114 screen_write_clearendofline(struct screen_write_ctx *ctx, u_int bg) 1115 { 1116 struct screen *s = ctx->s; 1117 struct grid_line *gl; 1118 u_int sx = screen_size_x(s); 1119 struct screen_write_collect_item *ci = ctx->item; 1120 1121 if (s->cx == 0) { 1122 screen_write_clearline(ctx, bg); 1123 return; 1124 } 1125 1126 gl = grid_get_line(s->grid, s->grid->hsize + s->cy); 1127 if (s->cx > sx - 1 || (s->cx >= gl->cellsize && COLOUR_DEFAULT(bg))) 1128 return; 1129 1130 grid_view_clear(s->grid, s->cx, s->cy, sx - s->cx, 1, bg); 1131 1132 screen_write_collect_clear_end(ctx, s->cy, s->cx); 1133 ci->x = s->cx; 1134 ci->type = CLEAR_END; 1135 ci->bg = bg; 1136 TAILQ_INSERT_TAIL(&ctx->s->write_list[s->cy].items, ci, entry); 1137 ctx->item = xcalloc(1, sizeof *ctx->item); 1138 } 1139 1140 /* Clear to start of line from cursor. */ 1141 void 1142 screen_write_clearstartofline(struct screen_write_ctx *ctx, u_int bg) 1143 { 1144 struct screen *s = ctx->s; 1145 u_int sx = screen_size_x(s); 1146 struct screen_write_collect_item *ci = ctx->item; 1147 1148 if (s->cx >= sx - 1) { 1149 screen_write_clearline(ctx, bg); 1150 return; 1151 } 1152 1153 if (s->cx > sx - 1) 1154 grid_view_clear(s->grid, 0, s->cy, sx, 1, bg); 1155 else 1156 grid_view_clear(s->grid, 0, s->cy, s->cx + 1, 1, bg); 1157 1158 screen_write_collect_clear_start(ctx, s->cy, s->cx); 1159 ci->x = s->cx; 1160 ci->type = CLEAR_START; 1161 ci->bg = bg; 1162 TAILQ_INSERT_TAIL(&ctx->s->write_list[s->cy].items, ci, entry); 1163 ctx->item = xcalloc(1, sizeof *ctx->item); 1164 } 1165 1166 /* Move cursor to px,py. */ 1167 void 1168 screen_write_cursormove(struct screen_write_ctx *ctx, int px, int py, 1169 int origin) 1170 { 1171 struct screen *s = ctx->s; 1172 1173 if (origin && py != -1 && (s->mode & MODE_ORIGIN)) { 1174 if ((u_int)py > s->rlower - s->rupper) 1175 py = s->rlower; 1176 else 1177 py += s->rupper; 1178 } 1179 1180 if (px != -1 && (u_int)px > screen_size_x(s) - 1) 1181 px = screen_size_x(s) - 1; 1182 if (py != -1 && (u_int)py > screen_size_y(s) - 1) 1183 py = screen_size_y(s) - 1; 1184 1185 screen_write_set_cursor(ctx, px, py); 1186 } 1187 1188 /* Reverse index (up with scroll). */ 1189 void 1190 screen_write_reverseindex(struct screen_write_ctx *ctx, u_int bg) 1191 { 1192 struct screen *s = ctx->s; 1193 struct tty_ctx ttyctx; 1194 1195 if (s->cy == s->rupper) { 1196 grid_view_scroll_region_down(s->grid, s->rupper, s->rlower, bg); 1197 screen_write_collect_flush(ctx, 0, __func__); 1198 1199 screen_write_initctx(ctx, &ttyctx, 1); 1200 ttyctx.bg = bg; 1201 1202 tty_write(tty_cmd_reverseindex, &ttyctx); 1203 } else if (s->cy > 0) 1204 screen_write_set_cursor(ctx, -1, s->cy - 1); 1205 1206 } 1207 1208 /* Set scroll region. */ 1209 void 1210 screen_write_scrollregion(struct screen_write_ctx *ctx, u_int rupper, 1211 u_int rlower) 1212 { 1213 struct screen *s = ctx->s; 1214 1215 if (rupper > screen_size_y(s) - 1) 1216 rupper = screen_size_y(s) - 1; 1217 if (rlower > screen_size_y(s) - 1) 1218 rlower = screen_size_y(s) - 1; 1219 if (rupper >= rlower) /* cannot be one line */ 1220 return; 1221 1222 screen_write_collect_flush(ctx, 0, __func__); 1223 1224 /* Cursor moves to top-left. */ 1225 screen_write_set_cursor(ctx, 0, 0); 1226 1227 s->rupper = rupper; 1228 s->rlower = rlower; 1229 } 1230 1231 /* Line feed. */ 1232 void 1233 screen_write_linefeed(struct screen_write_ctx *ctx, int wrapped, u_int bg) 1234 { 1235 struct screen *s = ctx->s; 1236 struct grid *gd = s->grid; 1237 struct grid_line *gl; 1238 1239 gl = grid_get_line(gd, gd->hsize + s->cy); 1240 if (wrapped) 1241 gl->flags |= GRID_LINE_WRAPPED; 1242 1243 log_debug("%s: at %u,%u (region %u-%u)", __func__, s->cx, s->cy, 1244 s->rupper, s->rlower); 1245 1246 if (bg != ctx->bg) { 1247 screen_write_collect_flush(ctx, 1, __func__); 1248 ctx->bg = bg; 1249 } 1250 1251 if (s->cy == s->rlower) { 1252 grid_view_scroll_region_up(gd, s->rupper, s->rlower, bg); 1253 screen_write_collect_scroll(ctx); 1254 ctx->scrolled++; 1255 } else if (s->cy < screen_size_y(s) - 1) 1256 screen_write_set_cursor(ctx, -1, s->cy + 1); 1257 } 1258 1259 /* Scroll up. */ 1260 void 1261 screen_write_scrollup(struct screen_write_ctx *ctx, u_int lines, u_int bg) 1262 { 1263 struct screen *s = ctx->s; 1264 struct grid *gd = s->grid; 1265 u_int i; 1266 1267 if (lines == 0) 1268 lines = 1; 1269 else if (lines > s->rlower - s->rupper + 1) 1270 lines = s->rlower - s->rupper + 1; 1271 1272 if (bg != ctx->bg) { 1273 screen_write_collect_flush(ctx, 1, __func__); 1274 ctx->bg = bg; 1275 } 1276 1277 for (i = 0; i < lines; i++) { 1278 grid_view_scroll_region_up(gd, s->rupper, s->rlower, bg); 1279 screen_write_collect_scroll(ctx); 1280 } 1281 ctx->scrolled += lines; 1282 } 1283 1284 /* Scroll down. */ 1285 void 1286 screen_write_scrolldown(struct screen_write_ctx *ctx, u_int lines, u_int bg) 1287 { 1288 struct screen *s = ctx->s; 1289 struct grid *gd = s->grid; 1290 struct tty_ctx ttyctx; 1291 u_int i; 1292 1293 screen_write_initctx(ctx, &ttyctx, 1); 1294 ttyctx.bg = bg; 1295 1296 if (lines == 0) 1297 lines = 1; 1298 else if (lines > s->rlower - s->rupper + 1) 1299 lines = s->rlower - s->rupper + 1; 1300 1301 for (i = 0; i < lines; i++) 1302 grid_view_scroll_region_down(gd, s->rupper, s->rlower, bg); 1303 1304 screen_write_collect_flush(ctx, 0, __func__); 1305 ttyctx.num = lines; 1306 tty_write(tty_cmd_scrolldown, &ttyctx); 1307 } 1308 1309 /* Carriage return (cursor to start of line). */ 1310 void 1311 screen_write_carriagereturn(struct screen_write_ctx *ctx) 1312 { 1313 screen_write_set_cursor(ctx, 0, -1); 1314 } 1315 1316 /* Clear to end of screen from cursor. */ 1317 void 1318 screen_write_clearendofscreen(struct screen_write_ctx *ctx, u_int bg) 1319 { 1320 struct screen *s = ctx->s; 1321 struct grid *gd = s->grid; 1322 struct tty_ctx ttyctx; 1323 u_int sx = screen_size_x(s), sy = screen_size_y(s); 1324 1325 screen_write_initctx(ctx, &ttyctx, 1); 1326 ttyctx.bg = bg; 1327 1328 /* Scroll into history if it is enabled and clearing entire screen. */ 1329 if (s->cx == 0 && s->cy == 0 && (gd->flags & GRID_HISTORY)) 1330 grid_view_clear_history(gd, bg); 1331 else { 1332 if (s->cx <= sx - 1) 1333 grid_view_clear(gd, s->cx, s->cy, sx - s->cx, 1, bg); 1334 grid_view_clear(gd, 0, s->cy + 1, sx, sy - (s->cy + 1), bg); 1335 } 1336 1337 screen_write_collect_clear(ctx, s->cy + 1, sy - (s->cy + 1)); 1338 screen_write_collect_flush(ctx, 0, __func__); 1339 tty_write(tty_cmd_clearendofscreen, &ttyctx); 1340 } 1341 1342 /* Clear to start of screen. */ 1343 void 1344 screen_write_clearstartofscreen(struct screen_write_ctx *ctx, u_int bg) 1345 { 1346 struct screen *s = ctx->s; 1347 struct tty_ctx ttyctx; 1348 u_int sx = screen_size_x(s); 1349 1350 screen_write_initctx(ctx, &ttyctx, 1); 1351 ttyctx.bg = bg; 1352 1353 if (s->cy > 0) 1354 grid_view_clear(s->grid, 0, 0, sx, s->cy, bg); 1355 if (s->cx > sx - 1) 1356 grid_view_clear(s->grid, 0, s->cy, sx, 1, bg); 1357 else 1358 grid_view_clear(s->grid, 0, s->cy, s->cx + 1, 1, bg); 1359 1360 screen_write_collect_clear(ctx, 0, s->cy); 1361 screen_write_collect_flush(ctx, 0, __func__); 1362 tty_write(tty_cmd_clearstartofscreen, &ttyctx); 1363 } 1364 1365 /* Clear entire screen. */ 1366 void 1367 screen_write_clearscreen(struct screen_write_ctx *ctx, u_int bg) 1368 { 1369 struct screen *s = ctx->s; 1370 struct tty_ctx ttyctx; 1371 u_int sx = screen_size_x(s), sy = screen_size_y(s); 1372 1373 screen_write_initctx(ctx, &ttyctx, 1); 1374 ttyctx.bg = bg; 1375 1376 /* Scroll into history if it is enabled. */ 1377 if (s->grid->flags & GRID_HISTORY) 1378 grid_view_clear_history(s->grid, bg); 1379 else 1380 grid_view_clear(s->grid, 0, 0, sx, sy, bg); 1381 1382 screen_write_collect_clear(ctx, 0, sy); 1383 tty_write(tty_cmd_clearscreen, &ttyctx); 1384 } 1385 1386 /* Clear entire history. */ 1387 void 1388 screen_write_clearhistory(struct screen_write_ctx *ctx) 1389 { 1390 grid_clear_history(ctx->s->grid); 1391 } 1392 1393 /* Clear to start of a collected line. */ 1394 static void 1395 screen_write_collect_clear_start(struct screen_write_ctx *ctx, u_int y, u_int x) 1396 { 1397 struct screen_write_collect_item *ci, *tmp; 1398 size_t size = 0; 1399 u_int items = 0; 1400 1401 if (TAILQ_EMPTY(&ctx->s->write_list[y].items)) 1402 return; 1403 TAILQ_FOREACH_SAFE(ci, &ctx->s->write_list[y].items, entry, tmp) { 1404 switch (ci->type) { 1405 case CLEAR_START: 1406 break; 1407 case CLEAR_END: 1408 if (ci->x <= x) 1409 ci->x = x; 1410 continue; 1411 case TEXT: 1412 if (ci->x > x) 1413 continue; 1414 break; 1415 } 1416 items++; 1417 size += ci->used; 1418 TAILQ_REMOVE(&ctx->s->write_list[y].items, ci, entry); 1419 free(ci); 1420 } 1421 ctx->skipped += size; 1422 log_debug("%s: dropped %u items (%zu bytes) (line %u)", __func__, items, 1423 size, y); 1424 } 1425 1426 /* Clear to end of a collected line. */ 1427 static void 1428 screen_write_collect_clear_end(struct screen_write_ctx *ctx, u_int y, u_int x) 1429 { 1430 struct screen_write_collect_item *ci, *tmp; 1431 size_t size = 0; 1432 u_int items = 0; 1433 1434 if (TAILQ_EMPTY(&ctx->s->write_list[y].items)) 1435 return; 1436 TAILQ_FOREACH_SAFE(ci, &ctx->s->write_list[y].items, entry, tmp) { 1437 switch (ci->type) { 1438 case CLEAR_START: 1439 if (ci->x >= x) 1440 ci->x = x; 1441 continue; 1442 case CLEAR_END: 1443 break; 1444 case TEXT: 1445 if (ci->x < x) 1446 continue; 1447 break; 1448 } 1449 items++; 1450 size += ci->used; 1451 TAILQ_REMOVE(&ctx->s->write_list[y].items, ci, entry); 1452 free(ci); 1453 } 1454 ctx->skipped += size; 1455 log_debug("%s: dropped %u items (%zu bytes) (line %u)", __func__, items, 1456 size, y); 1457 } 1458 1459 /* Clear collected lines. */ 1460 static void 1461 screen_write_collect_clear(struct screen_write_ctx *ctx, u_int y, u_int n) 1462 { 1463 struct screen_write_collect_item *ci, *tmp; 1464 struct screen_write_collect_line *cl; 1465 u_int i, items; 1466 size_t size; 1467 1468 for (i = y; i < y + n; i++) { 1469 if (TAILQ_EMPTY(&ctx->s->write_list[i].items)) 1470 continue; 1471 items = 0; 1472 size = 0; 1473 cl = &ctx->s->write_list[i]; 1474 TAILQ_FOREACH_SAFE(ci, &cl->items, entry, tmp) { 1475 items++; 1476 size += ci->used; 1477 TAILQ_REMOVE(&cl->items, ci, entry); 1478 free(ci); 1479 } 1480 ctx->skipped += size; 1481 log_debug("%s: dropped %u items (%zu bytes) (line %u)", 1482 __func__, items, size, y); 1483 } 1484 } 1485 1486 /* Scroll collected lines up. */ 1487 static void 1488 screen_write_collect_scroll(struct screen_write_ctx *ctx) 1489 { 1490 struct screen *s = ctx->s; 1491 struct screen_write_collect_line *cl; 1492 u_int y; 1493 char *saved; 1494 1495 log_debug("%s: at %u,%u (region %u-%u)", __func__, s->cx, s->cy, 1496 s->rupper, s->rlower); 1497 1498 screen_write_collect_clear(ctx, s->rupper, 1); 1499 saved = ctx->s->write_list[s->rupper].data; 1500 for (y = s->rupper; y < s->rlower; y++) { 1501 cl = &ctx->s->write_list[y + 1]; 1502 TAILQ_CONCAT(&ctx->s->write_list[y].items, &cl->items, entry); 1503 ctx->s->write_list[y].bg = cl->bg; 1504 ctx->s->write_list[y].data = cl->data; 1505 } 1506 ctx->s->write_list[s->rlower].bg = 1 + 8; 1507 ctx->s->write_list[s->rlower].data = saved; 1508 } 1509 1510 /* Flush collected lines. */ 1511 static void 1512 screen_write_collect_flush(struct screen_write_ctx *ctx, int scroll_only, 1513 const char *from) 1514 { 1515 struct screen *s = ctx->s; 1516 struct screen_write_collect_item *ci, *tmp; 1517 struct screen_write_collect_line *cl; 1518 u_int y, cx, cy, items = 0; 1519 struct tty_ctx ttyctx; 1520 size_t written = 0; 1521 1522 if (ctx->scrolled != 0) { 1523 log_debug("%s: scrolled %u (region %u-%u)", __func__, 1524 ctx->scrolled, s->rupper, s->rlower); 1525 if (ctx->scrolled > s->rlower - s->rupper + 1) 1526 ctx->scrolled = s->rlower - s->rupper + 1; 1527 1528 screen_write_initctx(ctx, &ttyctx, 1); 1529 ttyctx.num = ctx->scrolled; 1530 ttyctx.bg = ctx->bg; 1531 tty_write(tty_cmd_scrollup, &ttyctx); 1532 } 1533 ctx->scrolled = 0; 1534 ctx->bg = 8; 1535 1536 if (scroll_only) 1537 return; 1538 1539 cx = s->cx; cy = s->cy; 1540 for (y = 0; y < screen_size_y(s); y++) { 1541 cl = &ctx->s->write_list[y]; 1542 if (cl->bg != 0) { 1543 screen_write_set_cursor(ctx, 0, y); 1544 screen_write_initctx(ctx, &ttyctx, 1); 1545 ttyctx.bg = cl->bg - 1; 1546 tty_write(tty_cmd_clearline, &ttyctx); 1547 } 1548 TAILQ_FOREACH_SAFE(ci, &cl->items, entry, tmp) { 1549 screen_write_set_cursor(ctx, ci->x, y); 1550 if (ci->type == CLEAR_END) { 1551 screen_write_initctx(ctx, &ttyctx, 1); 1552 ttyctx.bg = ci->bg; 1553 tty_write(tty_cmd_clearendofline, &ttyctx); 1554 } else if (ci->type == CLEAR_START) { 1555 screen_write_initctx(ctx, &ttyctx, 1); 1556 ttyctx.bg = ci->bg; 1557 tty_write(tty_cmd_clearstartofline, &ttyctx); 1558 } else { 1559 screen_write_initctx(ctx, &ttyctx, 0); 1560 ttyctx.cell = &ci->gc; 1561 ttyctx.wrapped = ci->wrapped; 1562 ttyctx.ptr = cl->data + ci->x; 1563 ttyctx.num = ci->used; 1564 tty_write(tty_cmd_cells, &ttyctx); 1565 } 1566 1567 items++; 1568 written += ci->used; 1569 1570 TAILQ_REMOVE(&cl->items, ci, entry); 1571 free(ci); 1572 } 1573 cl->bg = 0; 1574 } 1575 s->cx = cx; s->cy = cy; 1576 1577 log_debug("%s: flushed %u items (%zu bytes) (%s)", __func__, items, 1578 written, from); 1579 ctx->written += written; 1580 } 1581 1582 /* Finish and store collected cells. */ 1583 void 1584 screen_write_collect_end(struct screen_write_ctx *ctx) 1585 { 1586 struct screen *s = ctx->s; 1587 struct screen_write_collect_item *ci = ctx->item; 1588 struct screen_write_collect_line *cl = &s->write_list[s->cy]; 1589 struct grid_cell gc; 1590 u_int xx; 1591 1592 if (ci->used == 0) 1593 return; 1594 1595 ci->x = s->cx; 1596 TAILQ_INSERT_TAIL(&cl->items, ci, entry); 1597 ctx->item = xcalloc(1, sizeof *ctx->item); 1598 1599 log_debug("%s: %u %.*s (at %u,%u)", __func__, ci->used, 1600 (int)ci->used, cl->data + ci->x, s->cx, s->cy); 1601 1602 if (s->cx != 0) { 1603 for (xx = s->cx; xx > 0; xx--) { 1604 grid_view_get_cell(s->grid, xx, s->cy, &gc); 1605 if (~gc.flags & GRID_FLAG_PADDING) 1606 break; 1607 grid_view_set_cell(s->grid, xx, s->cy, 1608 &grid_default_cell); 1609 } 1610 if (gc.data.width > 1) { 1611 grid_view_set_cell(s->grid, xx, s->cy, 1612 &grid_default_cell); 1613 } 1614 } 1615 1616 grid_view_set_cells(s->grid, s->cx, s->cy, &ci->gc, cl->data + ci->x, 1617 ci->used); 1618 screen_write_set_cursor(ctx, s->cx + ci->used, -1); 1619 1620 for (xx = s->cx; xx < screen_size_x(s); xx++) { 1621 grid_view_get_cell(s->grid, xx, s->cy, &gc); 1622 if (~gc.flags & GRID_FLAG_PADDING) 1623 break; 1624 grid_view_set_cell(s->grid, xx, s->cy, &grid_default_cell); 1625 } 1626 } 1627 1628 /* Write cell data, collecting if necessary. */ 1629 void 1630 screen_write_collect_add(struct screen_write_ctx *ctx, 1631 const struct grid_cell *gc) 1632 { 1633 struct screen *s = ctx->s; 1634 struct screen_write_collect_item *ci; 1635 u_int sx = screen_size_x(s); 1636 int collect; 1637 1638 /* 1639 * Don't need to check that the attributes and whatnot are still the 1640 * same - input_parse will end the collection when anything that isn't 1641 * a plain character is encountered. 1642 */ 1643 1644 collect = 1; 1645 if (gc->data.width != 1 || gc->data.size != 1 || *gc->data.data >= 0x7f) 1646 collect = 0; 1647 else if (gc->attr & GRID_ATTR_CHARSET) 1648 collect = 0; 1649 else if (~s->mode & MODE_WRAP) 1650 collect = 0; 1651 else if (s->mode & MODE_INSERT) 1652 collect = 0; 1653 else if (s->sel != NULL) 1654 collect = 0; 1655 if (!collect) { 1656 screen_write_collect_end(ctx); 1657 screen_write_collect_flush(ctx, 0, __func__); 1658 screen_write_cell(ctx, gc); 1659 return; 1660 } 1661 ctx->cells++; 1662 1663 if (s->cx > sx - 1 || ctx->item->used > sx - 1 - s->cx) 1664 screen_write_collect_end(ctx); 1665 ci = ctx->item; /* may have changed */ 1666 1667 if (s->cx > sx - 1) { 1668 log_debug("%s: wrapped at %u,%u", __func__, s->cx, s->cy); 1669 ci->wrapped = 1; 1670 screen_write_linefeed(ctx, 1, 8); 1671 screen_write_set_cursor(ctx, 0, -1); 1672 } 1673 1674 if (ci->used == 0) 1675 memcpy(&ci->gc, gc, sizeof ci->gc); 1676 if (ctx->s->write_list[s->cy].data == NULL) 1677 ctx->s->write_list[s->cy].data = xmalloc(screen_size_x(ctx->s)); 1678 ctx->s->write_list[s->cy].data[s->cx + ci->used++] = gc->data.data[0]; 1679 } 1680 1681 /* Write cell data. */ 1682 void 1683 screen_write_cell(struct screen_write_ctx *ctx, const struct grid_cell *gc) 1684 { 1685 struct screen *s = ctx->s; 1686 struct grid *gd = s->grid; 1687 struct grid_line *gl; 1688 struct grid_cell_entry *gce; 1689 struct grid_cell tmp_gc, now_gc; 1690 struct tty_ctx ttyctx; 1691 u_int sx = screen_size_x(s), sy = screen_size_y(s); 1692 u_int width = gc->data.width, xx, last, cx, cy; 1693 int selected, skip = 1; 1694 1695 /* Ignore padding cells. */ 1696 if (gc->flags & GRID_FLAG_PADDING) 1697 return; 1698 ctx->cells++; 1699 1700 /* If the width is zero, combine onto the previous character. */ 1701 if (width == 0) { 1702 screen_write_collect_flush(ctx, 0, __func__); 1703 if ((gc = screen_write_combine(ctx, &gc->data, &xx)) != 0) { 1704 cx = s->cx; cy = s->cy; 1705 screen_write_set_cursor(ctx, xx, s->cy); 1706 screen_write_initctx(ctx, &ttyctx, 0); 1707 ttyctx.cell = gc; 1708 tty_write(tty_cmd_cell, &ttyctx); 1709 s->cx = cx; s->cy = cy; 1710 } 1711 return; 1712 } 1713 1714 /* Flush any existing scrolling. */ 1715 screen_write_collect_flush(ctx, 1, __func__); 1716 1717 /* If this character doesn't fit, ignore it. */ 1718 if ((~s->mode & MODE_WRAP) && 1719 width > 1 && 1720 (width > sx || (s->cx != sx && s->cx > sx - width))) 1721 return; 1722 1723 /* If in insert mode, make space for the cells. */ 1724 if (s->mode & MODE_INSERT) { 1725 grid_view_insert_cells(s->grid, s->cx, s->cy, width, 8); 1726 skip = 0; 1727 } 1728 1729 /* Check this will fit on the current line and wrap if not. */ 1730 if ((s->mode & MODE_WRAP) && s->cx > sx - width) { 1731 log_debug("%s: wrapped at %u,%u", __func__, s->cx, s->cy); 1732 screen_write_linefeed(ctx, 1, 8); 1733 screen_write_set_cursor(ctx, 0, -1); 1734 screen_write_collect_flush(ctx, 1, __func__); 1735 } 1736 1737 /* Sanity check cursor position. */ 1738 if (s->cx > sx - width || s->cy > sy - 1) 1739 return; 1740 screen_write_initctx(ctx, &ttyctx, 0); 1741 1742 /* Handle overwriting of UTF-8 characters. */ 1743 gl = grid_get_line(s->grid, s->grid->hsize + s->cy); 1744 if (gl->flags & GRID_LINE_EXTENDED) { 1745 grid_view_get_cell(gd, s->cx, s->cy, &now_gc); 1746 if (screen_write_overwrite(ctx, &now_gc, width)) 1747 skip = 0; 1748 } 1749 1750 /* 1751 * If the new character is UTF-8 wide, fill in padding cells. Have 1752 * already ensured there is enough room. 1753 */ 1754 for (xx = s->cx + 1; xx < s->cx + width; xx++) { 1755 log_debug("%s: new padding at %u,%u", __func__, xx, s->cy); 1756 grid_view_set_padding(gd, xx, s->cy); 1757 skip = 0; 1758 } 1759 1760 /* If no change, do not draw. */ 1761 if (skip) { 1762 if (s->cx >= gl->cellsize) 1763 skip = grid_cells_equal(gc, &grid_default_cell); 1764 else { 1765 gce = &gl->celldata[s->cx]; 1766 if (gce->flags & GRID_FLAG_EXTENDED) 1767 skip = 0; 1768 else if (gc->flags != gce->flags) 1769 skip = 0; 1770 else if (gc->attr != gce->data.attr) 1771 skip = 0; 1772 else if (gc->fg != gce->data.fg) 1773 skip = 0; 1774 else if (gc->bg != gce->data.bg) 1775 skip = 0; 1776 else if (gc->data.width != 1) 1777 skip = 0; 1778 else if (gc->data.size != 1) 1779 skip = 0; 1780 else if (gce->data.data != gc->data.data[0]) 1781 skip = 0; 1782 } 1783 } 1784 1785 /* Update the selected flag and set the cell. */ 1786 selected = screen_check_selection(s, s->cx, s->cy); 1787 if (selected && (~gc->flags & GRID_FLAG_SELECTED)) { 1788 memcpy(&tmp_gc, gc, sizeof tmp_gc); 1789 tmp_gc.flags |= GRID_FLAG_SELECTED; 1790 grid_view_set_cell(gd, s->cx, s->cy, &tmp_gc); 1791 } else if (!selected && (gc->flags & GRID_FLAG_SELECTED)) { 1792 memcpy(&tmp_gc, gc, sizeof tmp_gc); 1793 tmp_gc.flags &= ~GRID_FLAG_SELECTED; 1794 grid_view_set_cell(gd, s->cx, s->cy, &tmp_gc); 1795 } else if (!skip) 1796 grid_view_set_cell(gd, s->cx, s->cy, gc); 1797 if (selected) 1798 skip = 0; 1799 1800 /* 1801 * Move the cursor. If not wrapping, stick at the last character and 1802 * replace it. 1803 */ 1804 last = !(s->mode & MODE_WRAP); 1805 if (s->cx <= sx - last - width) 1806 screen_write_set_cursor(ctx, s->cx + width, -1); 1807 else 1808 screen_write_set_cursor(ctx, sx - last, -1); 1809 1810 /* Create space for character in insert mode. */ 1811 if (s->mode & MODE_INSERT) { 1812 screen_write_collect_flush(ctx, 0, __func__); 1813 ttyctx.num = width; 1814 tty_write(tty_cmd_insertcharacter, &ttyctx); 1815 } 1816 1817 /* Write to the screen. */ 1818 if (!skip) { 1819 if (selected) { 1820 screen_select_cell(s, &tmp_gc, gc); 1821 ttyctx.cell = &tmp_gc; 1822 } else 1823 ttyctx.cell = gc; 1824 tty_write(tty_cmd_cell, &ttyctx); 1825 ctx->written++; 1826 } else 1827 ctx->skipped++; 1828 } 1829 1830 /* Combine a UTF-8 zero-width character onto the previous. */ 1831 static const struct grid_cell * 1832 screen_write_combine(struct screen_write_ctx *ctx, const struct utf8_data *ud, 1833 u_int *xx) 1834 { 1835 struct screen *s = ctx->s; 1836 struct grid *gd = s->grid; 1837 static struct grid_cell gc; 1838 u_int n; 1839 1840 /* Can't combine if at 0. */ 1841 if (s->cx == 0) 1842 return (NULL); 1843 1844 /* Empty data is out. */ 1845 if (ud->size == 0) 1846 fatalx("UTF-8 data empty"); 1847 1848 /* Retrieve the previous cell. */ 1849 for (n = 1; n <= s->cx; n++) { 1850 grid_view_get_cell(gd, s->cx - n, s->cy, &gc); 1851 if (~gc.flags & GRID_FLAG_PADDING) 1852 break; 1853 } 1854 if (n > s->cx) 1855 return (NULL); 1856 *xx = s->cx - n; 1857 1858 /* Check there is enough space. */ 1859 if (gc.data.size + ud->size > sizeof gc.data.data) 1860 return (NULL); 1861 1862 log_debug("%s: %.*s onto %.*s at %u,%u", __func__, (int)ud->size, 1863 ud->data, (int)gc.data.size, gc.data.data, *xx, s->cy); 1864 1865 /* Append the data. */ 1866 memcpy(gc.data.data + gc.data.size, ud->data, ud->size); 1867 gc.data.size += ud->size; 1868 1869 /* Set the new cell. */ 1870 grid_view_set_cell(gd, *xx, s->cy, &gc); 1871 1872 return (&gc); 1873 } 1874 1875 /* 1876 * UTF-8 wide characters are a bit of an annoyance. They take up more than one 1877 * cell on the screen, so following cells must not be drawn by marking them as 1878 * padding. 1879 * 1880 * So far, so good. The problem is, when overwriting a padding cell, or a UTF-8 1881 * character, it is necessary to also overwrite any other cells which covered 1882 * by the same character. 1883 */ 1884 static int 1885 screen_write_overwrite(struct screen_write_ctx *ctx, struct grid_cell *gc, 1886 u_int width) 1887 { 1888 struct screen *s = ctx->s; 1889 struct grid *gd = s->grid; 1890 struct grid_cell tmp_gc; 1891 u_int xx; 1892 int done = 0; 1893 1894 if (gc->flags & GRID_FLAG_PADDING) { 1895 /* 1896 * A padding cell, so clear any following and leading padding 1897 * cells back to the character. Don't overwrite the current 1898 * cell as that happens later anyway. 1899 */ 1900 xx = s->cx + 1; 1901 while (--xx > 0) { 1902 grid_view_get_cell(gd, xx, s->cy, &tmp_gc); 1903 if (~tmp_gc.flags & GRID_FLAG_PADDING) 1904 break; 1905 log_debug("%s: padding at %u,%u", __func__, xx, s->cy); 1906 grid_view_set_cell(gd, xx, s->cy, &grid_default_cell); 1907 } 1908 1909 /* Overwrite the character at the start of this padding. */ 1910 log_debug("%s: character at %u,%u", __func__, xx, s->cy); 1911 grid_view_set_cell(gd, xx, s->cy, &grid_default_cell); 1912 done = 1; 1913 } 1914 1915 /* 1916 * Overwrite any padding cells that belong to any UTF-8 characters 1917 * we'll be overwriting with the current character. 1918 */ 1919 if (width != 1 || 1920 gc->data.width != 1 || 1921 gc->flags & GRID_FLAG_PADDING) { 1922 xx = s->cx + width - 1; 1923 while (++xx < screen_size_x(s)) { 1924 grid_view_get_cell(gd, xx, s->cy, &tmp_gc); 1925 if (~tmp_gc.flags & GRID_FLAG_PADDING) 1926 break; 1927 log_debug("%s: overwrite at %u,%u", __func__, xx, 1928 s->cy); 1929 grid_view_set_cell(gd, xx, s->cy, &grid_default_cell); 1930 done = 1; 1931 } 1932 } 1933 1934 return (done); 1935 } 1936 1937 /* Set external clipboard. */ 1938 void 1939 screen_write_setselection(struct screen_write_ctx *ctx, u_char *str, u_int len) 1940 { 1941 struct tty_ctx ttyctx; 1942 1943 screen_write_initctx(ctx, &ttyctx, 0); 1944 ttyctx.ptr = str; 1945 ttyctx.num = len; 1946 1947 tty_write(tty_cmd_setselection, &ttyctx); 1948 } 1949 1950 /* Write unmodified string. */ 1951 void 1952 screen_write_rawstring(struct screen_write_ctx *ctx, u_char *str, u_int len) 1953 { 1954 struct tty_ctx ttyctx; 1955 1956 screen_write_initctx(ctx, &ttyctx, 0); 1957 ttyctx.ptr = str; 1958 ttyctx.num = len; 1959 1960 tty_write(tty_cmd_rawstring, &ttyctx); 1961 } 1962 1963 /* Turn alternate screen on. */ 1964 void 1965 screen_write_alternateon(struct screen_write_ctx *ctx, struct grid_cell *gc, 1966 int cursor) 1967 { 1968 struct tty_ctx ttyctx; 1969 struct window_pane *wp = ctx->wp; 1970 1971 if (wp != NULL && !options_get_number(wp->options, "alternate-screen")) 1972 return; 1973 screen_alternate_on(ctx->s, gc, cursor); 1974 1975 screen_write_initctx(ctx, &ttyctx, 1); 1976 ttyctx.redraw_cb(&ttyctx); 1977 } 1978 1979 /* Turn alternate screen off. */ 1980 void 1981 screen_write_alternateoff(struct screen_write_ctx *ctx, struct grid_cell *gc, 1982 int cursor) 1983 { 1984 struct tty_ctx ttyctx; 1985 struct window_pane *wp = ctx->wp; 1986 1987 if (wp != NULL && !options_get_number(wp->options, "alternate-screen")) 1988 return; 1989 screen_alternate_off(ctx->s, gc, cursor); 1990 1991 screen_write_initctx(ctx, &ttyctx, 1); 1992 ttyctx.redraw_cb(&ttyctx); 1993 } 1994