1 /* $OpenBSD: format-draw.c,v 1.24 2021/08/22 15:33:14 nicm Exp $ */ 2 3 /* 4 * Copyright (c) 2019 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 /* Format range. */ 27 struct format_range { 28 u_int index; 29 struct screen *s; 30 31 u_int start; 32 u_int end; 33 34 enum style_range_type type; 35 u_int argument; 36 37 TAILQ_ENTRY(format_range) entry; 38 }; 39 TAILQ_HEAD(format_ranges, format_range); 40 41 /* Does this range match this style? */ 42 static int 43 format_is_type(struct format_range *fr, struct style *sy) 44 { 45 if (fr->type != sy->range_type) 46 return (0); 47 if (fr->type == STYLE_RANGE_WINDOW && 48 fr->argument != sy->range_argument) 49 return (0); 50 return (1); 51 } 52 53 /* Free a range. */ 54 static void 55 format_free_range(struct format_ranges *frs, struct format_range *fr) 56 { 57 TAILQ_REMOVE(frs, fr, entry); 58 free(fr); 59 } 60 61 /* Fix range positions. */ 62 static void 63 format_update_ranges(struct format_ranges *frs, struct screen *s, u_int offset, 64 u_int start, u_int width) 65 { 66 struct format_range *fr, *fr1; 67 68 if (frs == NULL) 69 return; 70 71 TAILQ_FOREACH_SAFE(fr, frs, entry, fr1) { 72 if (fr->s != s) 73 continue; 74 75 if (fr->end <= start || fr->start >= start + width) { 76 format_free_range(frs, fr); 77 continue; 78 } 79 80 if (fr->start < start) 81 fr->start = start; 82 if (fr->end > start + width) 83 fr->end = start + width; 84 if (fr->start == fr->end) { 85 format_free_range(frs, fr); 86 continue; 87 } 88 89 fr->start -= start; 90 fr->end -= start; 91 92 fr->start += offset; 93 fr->end += offset; 94 } 95 } 96 97 /* Draw a part of the format. */ 98 static void 99 format_draw_put(struct screen_write_ctx *octx, u_int ocx, u_int ocy, 100 struct screen *s, struct format_ranges *frs, u_int offset, u_int start, 101 u_int width) 102 { 103 /* 104 * The offset is how far from the cursor on the target screen; start 105 * and width how much to copy from the source screen. 106 */ 107 screen_write_cursormove(octx, ocx + offset, ocy, 0); 108 screen_write_fast_copy(octx, s, start, 0, width, 1); 109 format_update_ranges(frs, s, offset, start, width); 110 } 111 112 /* Draw list part of format. */ 113 static void 114 format_draw_put_list(struct screen_write_ctx *octx, 115 u_int ocx, u_int ocy, u_int offset, u_int width, struct screen *list, 116 struct screen *list_left, struct screen *list_right, int focus_start, 117 int focus_end, struct format_ranges *frs) 118 { 119 u_int start, focus_centre; 120 121 /* If there is enough space for the list, draw it entirely. */ 122 if (width >= list->cx) { 123 format_draw_put(octx, ocx, ocy, list, frs, offset, 0, width); 124 return; 125 } 126 127 /* The list needs to be trimmed. Try to keep the focus visible. */ 128 focus_centre = focus_start + (focus_end - focus_start) / 2; 129 if (focus_centre < width / 2) 130 start = 0; 131 else 132 start = focus_centre - width / 2; 133 if (start + width > list->cx) 134 start = list->cx - width; 135 136 /* Draw <> markers at either side if needed. */ 137 if (start != 0 && width > list_left->cx) { 138 screen_write_cursormove(octx, ocx + offset, ocy, 0); 139 screen_write_fast_copy(octx, list_left, 0, 0, list_left->cx, 1); 140 offset += list_left->cx; 141 start += list_left->cx; 142 width -= list_left->cx; 143 } 144 if (start + width < list->cx && width > list_right->cx) { 145 screen_write_cursormove(octx, ocx + offset + width - 146 list_right->cx, ocy, 0); 147 screen_write_fast_copy(octx, list_right, 0, 0, list_right->cx, 148 1); 149 width -= list_right->cx; 150 } 151 152 /* Draw the list screen itself. */ 153 format_draw_put(octx, ocx, ocy, list, frs, offset, start, width); 154 } 155 156 /* Draw format with no list. */ 157 static void 158 format_draw_none(struct screen_write_ctx *octx, u_int available, u_int ocx, 159 u_int ocy, struct screen *left, struct screen *centre, struct screen *right, 160 struct screen *abs_centre, struct format_ranges *frs) 161 { 162 u_int width_left, width_centre, width_right, width_abs_centre; 163 164 width_left = left->cx; 165 width_centre = centre->cx; 166 width_right = right->cx; 167 width_abs_centre = abs_centre->cx; 168 169 /* 170 * Try to keep as much of the left and right as possible at the expense 171 * of the centre. 172 */ 173 while (width_left + width_centre + width_right > available) { 174 if (width_centre > 0) 175 width_centre--; 176 else if (width_right > 0) 177 width_right--; 178 else 179 width_left--; 180 } 181 182 /* Write left. */ 183 format_draw_put(octx, ocx, ocy, left, frs, 0, 0, width_left); 184 185 /* Write right at available - width_right. */ 186 format_draw_put(octx, ocx, ocy, right, frs, 187 available - width_right, 188 right->cx - width_right, 189 width_right); 190 191 /* 192 * Write centre halfway between 193 * width_left 194 * and 195 * available - width_right. 196 */ 197 format_draw_put(octx, ocx, ocy, centre, frs, 198 width_left 199 + ((available - width_right) - width_left) / 2 200 - width_centre / 2, 201 centre->cx / 2 - width_centre / 2, 202 width_centre); 203 204 /* 205 * Write abs_centre in the perfect centre of all horizontal space. 206 */ 207 if (width_abs_centre > available) 208 width_abs_centre = available; 209 format_draw_put(octx, ocx, ocy, abs_centre, frs, 210 (available - width_abs_centre) / 2, 211 0, 212 width_abs_centre); 213 } 214 215 /* Draw format with list on the left. */ 216 static void 217 format_draw_left(struct screen_write_ctx *octx, u_int available, u_int ocx, 218 u_int ocy, struct screen *left, struct screen *centre, struct screen *right, 219 struct screen *abs_centre, struct screen *list, struct screen *list_left, 220 struct screen *list_right, struct screen *after, int focus_start, 221 int focus_end, struct format_ranges *frs) 222 { 223 u_int width_left, width_centre, width_right; 224 u_int width_list, width_after, width_abs_centre; 225 struct screen_write_ctx ctx; 226 227 width_left = left->cx; 228 width_centre = centre->cx; 229 width_right = right->cx; 230 width_abs_centre = abs_centre->cx; 231 width_list = list->cx; 232 width_after = after->cx; 233 234 /* 235 * Trim first the centre, then the list, then the right, then after the 236 * list, then the left. 237 */ 238 while (width_left + 239 width_centre + 240 width_right + 241 width_list + 242 width_after > available) { 243 if (width_centre > 0) 244 width_centre--; 245 else if (width_list > 0) 246 width_list--; 247 else if (width_right > 0) 248 width_right--; 249 else if (width_after > 0) 250 width_after--; 251 else 252 width_left--; 253 } 254 255 /* If there is no list left, pass off to the no list function. */ 256 if (width_list == 0) { 257 screen_write_start(&ctx, left); 258 screen_write_fast_copy(&ctx, after, 0, 0, width_after, 1); 259 screen_write_stop(&ctx); 260 261 format_draw_none(octx, available, ocx, ocy, left, centre, 262 right, abs_centre, frs); 263 return; 264 } 265 266 /* Write left at 0. */ 267 format_draw_put(octx, ocx, ocy, left, frs, 0, 0, width_left); 268 269 /* Write right at available - width_right. */ 270 format_draw_put(octx, ocx, ocy, right, frs, 271 available - width_right, 272 right->cx - width_right, 273 width_right); 274 275 /* Write after at width_left + width_list. */ 276 format_draw_put(octx, ocx, ocy, after, frs, 277 width_left + width_list, 278 0, 279 width_after); 280 281 /* 282 * Write centre halfway between 283 * width_left + width_list + width_after 284 * and 285 * available - width_right. 286 */ 287 format_draw_put(octx, ocx, ocy, centre, frs, 288 (width_left + width_list + width_after) 289 + ((available - width_right) 290 - (width_left + width_list + width_after)) / 2 291 - width_centre / 2, 292 centre->cx / 2 - width_centre / 2, 293 width_centre); 294 295 /* 296 * The list now goes from 297 * width_left 298 * to 299 * width_left + width_list. 300 * If there is no focus given, keep the left in focus. 301 */ 302 if (focus_start == -1 || focus_end == -1) 303 focus_start = focus_end = 0; 304 format_draw_put_list(octx, ocx, ocy, width_left, width_list, list, 305 list_left, list_right, focus_start, focus_end, frs); 306 307 /* 308 * Write abs_centre in the perfect centre of all horizontal space. 309 */ 310 if (width_abs_centre > available) 311 width_abs_centre = available; 312 format_draw_put(octx, ocx, ocy, abs_centre, frs, 313 (available - width_abs_centre) / 2, 314 0, 315 width_abs_centre); 316 } 317 318 /* Draw format with list in the centre. */ 319 static void 320 format_draw_centre(struct screen_write_ctx *octx, u_int available, u_int ocx, 321 u_int ocy, struct screen *left, struct screen *centre, struct screen *right, 322 struct screen *abs_centre, struct screen *list, struct screen *list_left, 323 struct screen *list_right, struct screen *after, int focus_start, 324 int focus_end, struct format_ranges *frs) 325 { 326 u_int width_left, width_centre, width_right, middle; 327 u_int width_list, width_after, width_abs_centre; 328 struct screen_write_ctx ctx; 329 330 width_left = left->cx; 331 width_centre = centre->cx; 332 width_right = right->cx; 333 width_abs_centre = abs_centre->cx; 334 width_list = list->cx; 335 width_after = after->cx; 336 337 /* 338 * Trim first the list, then after the list, then the centre, then the 339 * right, then the left. 340 */ 341 while (width_left + 342 width_centre + 343 width_right + 344 width_list + 345 width_after > available) { 346 if (width_list > 0) 347 width_list--; 348 else if (width_after > 0) 349 width_after--; 350 else if (width_centre > 0) 351 width_centre--; 352 else if (width_right > 0) 353 width_right--; 354 else 355 width_left--; 356 } 357 358 /* If there is no list left, pass off to the no list function. */ 359 if (width_list == 0) { 360 screen_write_start(&ctx, centre); 361 screen_write_fast_copy(&ctx, after, 0, 0, width_after, 1); 362 screen_write_stop(&ctx); 363 364 format_draw_none(octx, available, ocx, ocy, left, centre, 365 right, abs_centre, frs); 366 return; 367 } 368 369 /* Write left at 0. */ 370 format_draw_put(octx, ocx, ocy, left, frs, 0, 0, width_left); 371 372 /* Write right at available - width_right. */ 373 format_draw_put(octx, ocx, ocy, right, frs, 374 available - width_right, 375 right->cx - width_right, 376 width_right); 377 378 /* 379 * All three centre sections are offset from the middle of the 380 * available space. 381 */ 382 middle = (width_left + ((available - width_right) - width_left) / 2); 383 384 /* 385 * Write centre at 386 * middle - width_list / 2 - width_centre. 387 */ 388 format_draw_put(octx, ocx, ocy, centre, frs, 389 middle - width_list / 2 - width_centre, 390 0, 391 width_centre); 392 393 /* 394 * Write after at 395 * middle - width_list / 2 + width_list 396 */ 397 format_draw_put(octx, ocx, ocy, after, frs, 398 middle - width_list / 2 + width_list, 399 0, 400 width_after); 401 402 /* 403 * The list now goes from 404 * middle - width_list / 2 405 * to 406 * middle + width_list / 2 407 * If there is no focus given, keep the centre in focus. 408 */ 409 if (focus_start == -1 || focus_end == -1) 410 focus_start = focus_end = list->cx / 2; 411 format_draw_put_list(octx, ocx, ocy, middle - width_list / 2, 412 width_list, list, list_left, list_right, focus_start, focus_end, 413 frs); 414 415 /* 416 * Write abs_centre in the perfect centre of all horizontal space. 417 */ 418 if (width_abs_centre > available) 419 width_abs_centre = available; 420 format_draw_put(octx, ocx, ocy, abs_centre, frs, 421 (available - width_abs_centre) / 2, 422 0, 423 width_abs_centre); 424 } 425 426 /* Draw format with list on the right. */ 427 static void 428 format_draw_right(struct screen_write_ctx *octx, u_int available, u_int ocx, 429 u_int ocy, struct screen *left, struct screen *centre, struct screen *right, 430 struct screen *abs_centre, struct screen *list, 431 struct screen *list_left, struct screen *list_right, struct screen *after, 432 int focus_start, int focus_end, struct format_ranges *frs) 433 { 434 u_int width_left, width_centre, width_right; 435 u_int width_list, width_after, width_abs_centre; 436 struct screen_write_ctx ctx; 437 438 width_left = left->cx; 439 width_centre = centre->cx; 440 width_right = right->cx; 441 width_abs_centre = abs_centre->cx; 442 width_list = list->cx; 443 width_after = after->cx; 444 445 /* 446 * Trim first the centre, then the list, then the right, then 447 * after the list, then the left. 448 */ 449 while (width_left + 450 width_centre + 451 width_right + 452 width_list + 453 width_after > available) { 454 if (width_centre > 0) 455 width_centre--; 456 else if (width_list > 0) 457 width_list--; 458 else if (width_right > 0) 459 width_right--; 460 else if (width_after > 0) 461 width_after--; 462 else 463 width_left--; 464 } 465 466 /* If there is no list left, pass off to the no list function. */ 467 if (width_list == 0) { 468 screen_write_start(&ctx, right); 469 screen_write_fast_copy(&ctx, after, 0, 0, width_after, 1); 470 screen_write_stop(&ctx); 471 472 format_draw_none(octx, available, ocx, ocy, left, centre, 473 right, abs_centre, frs); 474 return; 475 } 476 477 /* Write left at 0. */ 478 format_draw_put(octx, ocx, ocy, left, frs, 0, 0, width_left); 479 480 /* Write after at available - width_after. */ 481 format_draw_put(octx, ocx, ocy, after, frs, 482 available - width_after, 483 after->cx - width_after, 484 width_after); 485 486 /* 487 * Write right at 488 * available - width_right - width_list - width_after. 489 */ 490 format_draw_put(octx, ocx, ocy, right, frs, 491 available - width_right - width_list - width_after, 492 0, 493 width_right); 494 495 /* 496 * Write centre halfway between 497 * width_left 498 * and 499 * available - width_right - width_list - width_after. 500 */ 501 format_draw_put(octx, ocx, ocy, centre, frs, 502 width_left 503 + ((available - width_right - width_list - width_after) 504 - width_left) / 2 505 - width_centre / 2, 506 centre->cx / 2 - width_centre / 2, 507 width_centre); 508 509 /* 510 * The list now goes from 511 * available - width_list - width_after 512 * to 513 * available - width_after 514 * If there is no focus given, keep the right in focus. 515 */ 516 if (focus_start == -1 || focus_end == -1) 517 focus_start = focus_end = 0; 518 format_draw_put_list(octx, ocx, ocy, available - width_list - 519 width_after, width_list, list, list_left, list_right, focus_start, 520 focus_end, frs); 521 522 /* 523 * Write abs_centre in the perfect centre of all horizontal space. 524 */ 525 if (width_abs_centre > available) 526 width_abs_centre = available; 527 format_draw_put(octx, ocx, ocy, abs_centre, frs, 528 (available - width_abs_centre) / 2, 529 0, 530 width_abs_centre); 531 } 532 533 static void 534 format_draw_absolute_centre(struct screen_write_ctx *octx, u_int available, 535 u_int ocx, u_int ocy, struct screen *left, struct screen *centre, 536 struct screen *right, struct screen *abs_centre, struct screen *list, 537 struct screen *list_left, struct screen *list_right, struct screen *after, 538 int focus_start, int focus_end, struct format_ranges *frs) 539 { 540 u_int width_left, width_centre, width_right, width_abs_centre; 541 u_int width_list, width_after, middle, abs_centre_offset; 542 543 width_left = left->cx; 544 width_centre = centre->cx; 545 width_right = right->cx; 546 width_abs_centre = abs_centre->cx; 547 width_list = list->cx; 548 width_after = after->cx; 549 550 /* 551 * Trim first centre, then the right, then the left. 552 */ 553 while (width_left + 554 width_centre + 555 width_right > available) { 556 if (width_centre > 0) 557 width_centre--; 558 else if (width_right > 0) 559 width_right--; 560 else 561 width_left--; 562 } 563 564 /* 565 * We trim list after and abs_centre independently, as we are drawing 566 * them over the rest. Trim first the list, then after the list, then 567 * abs_centre. 568 */ 569 while (width_list + width_after + width_abs_centre > available) { 570 if (width_list > 0) 571 width_list--; 572 else if (width_after > 0) 573 width_after--; 574 else 575 width_abs_centre--; 576 } 577 578 /* Write left at 0. */ 579 format_draw_put(octx, ocx, ocy, left, frs, 0, 0, width_left); 580 581 /* Write right at available - width_right. */ 582 format_draw_put(octx, ocx, ocy, right, frs, 583 available - width_right, 584 right->cx - width_right, 585 width_right); 586 587 /* 588 * Keep writing centre at the relative centre. Only the list is written 589 * in the absolute centre of the horizontal space. 590 */ 591 middle = (width_left + ((available - width_right) - width_left) / 2); 592 593 /* 594 * Write centre at 595 * middle - width_centre. 596 */ 597 format_draw_put(octx, ocx, ocy, centre, frs, 598 middle - width_centre, 599 0, 600 width_centre); 601 602 /* 603 * If there is no focus given, keep the centre in focus. 604 */ 605 if (focus_start == -1 || focus_end == -1) 606 focus_start = focus_end = list->cx / 2; 607 608 /* 609 * We centre abs_centre and the list together, so their shared centre is 610 * in the perfect centre of horizontal space. 611 */ 612 abs_centre_offset = (available - width_list - width_abs_centre) / 2; 613 614 /* 615 * Write abs_centre before the list. 616 */ 617 format_draw_put(octx, ocx, ocy, abs_centre, frs, abs_centre_offset, 618 0, width_abs_centre); 619 abs_centre_offset += width_abs_centre; 620 621 /* 622 * Draw the list in the absolute centre 623 */ 624 format_draw_put_list(octx, ocx, ocy, abs_centre_offset, width_list, 625 list, list_left, list_right, focus_start, focus_end, frs); 626 abs_centre_offset += width_list; 627 628 /* 629 * Write after at the end of the centre 630 */ 631 format_draw_put(octx, ocx, ocy, after, frs, abs_centre_offset, 0, 632 width_after); 633 } 634 635 /* Get width and count of any leading #s. */ 636 static const char * 637 format_leading_hashes(const char *cp, u_int *n, u_int *width) 638 { 639 for (*n = 0; cp[*n] == '#'; (*n)++) 640 /* nothing */; 641 if (*n == 0) { 642 *width = 0; 643 return (cp); 644 } 645 if (cp[*n] != '[') { 646 if ((*n % 2) == 0) 647 *width = (*n / 2); 648 else 649 *width = (*n / 2) + 1; 650 return (cp + *n); 651 } 652 *width = (*n / 2); 653 if ((*n % 2) == 0) { 654 /* 655 * An even number of #s means that all #s are escaped, so not a 656 * style. The caller should not skip this. Return pointing to 657 * the [. 658 */ 659 return (cp + *n); 660 } 661 /* This is a style, so return pointing to the #. */ 662 return (cp + *n - 1); 663 } 664 665 /* Draw multiple characters. */ 666 static void 667 format_draw_many(struct screen_write_ctx *ctx, struct style *sy, char ch, 668 u_int n) 669 { 670 u_int i; 671 672 utf8_set(&sy->gc.data, ch); 673 for (i = 0; i < n; i++) 674 screen_write_cell(ctx, &sy->gc); 675 } 676 677 /* Draw a format to a screen. */ 678 void 679 format_draw(struct screen_write_ctx *octx, const struct grid_cell *base, 680 u_int available, const char *expanded, struct style_ranges *srs) 681 { 682 enum { LEFT, 683 CENTRE, 684 RIGHT, 685 ABSOLUTE_CENTRE, 686 LIST, 687 LIST_LEFT, 688 LIST_RIGHT, 689 AFTER, 690 TOTAL } current = LEFT, last = LEFT; 691 const char *names[] = { "LEFT", 692 "CENTRE", 693 "RIGHT", 694 "ABSOLUTE_CENTRE", 695 "LIST", 696 "LIST_LEFT", 697 "LIST_RIGHT", 698 "AFTER" }; 699 size_t size = strlen(expanded); 700 struct screen *os = octx->s, s[TOTAL]; 701 struct screen_write_ctx ctx[TOTAL]; 702 u_int ocx = os->cx, ocy = os->cy, n, i, width[TOTAL]; 703 u_int map[] = { LEFT, 704 LEFT, 705 CENTRE, 706 RIGHT, 707 ABSOLUTE_CENTRE }; 708 int focus_start = -1, focus_end = -1; 709 int list_state = -1, fill = -1, even; 710 enum style_align list_align = STYLE_ALIGN_DEFAULT; 711 struct grid_cell gc, current_default; 712 struct style sy, saved_sy; 713 struct utf8_data *ud = &sy.gc.data; 714 const char *cp, *end; 715 enum utf8_state more; 716 char *tmp; 717 struct format_range *fr = NULL, *fr1; 718 struct format_ranges frs; 719 struct style_range *sr; 720 721 memcpy(¤t_default, base, sizeof current_default); 722 style_set(&sy, ¤t_default); 723 TAILQ_INIT(&frs); 724 log_debug("%s: %s", __func__, expanded); 725 726 /* 727 * We build three screens for left, right, centre alignment, one for 728 * the list, one for anything after the list and two for the list left 729 * and right markers. 730 */ 731 for (i = 0; i < TOTAL; i++) { 732 screen_init(&s[i], size, 1, 0); 733 screen_write_start(&ctx[i], &s[i]); 734 screen_write_clearendofline(&ctx[i], current_default.bg); 735 width[i] = 0; 736 } 737 738 /* 739 * Walk the string and add to the corresponding screens, 740 * parsing styles as we go. 741 */ 742 cp = expanded; 743 while (*cp != '\0') { 744 /* Handle sequences of #. */ 745 if (cp[0] == '#' && cp[1] != '[' && cp[1] != '\0') { 746 for (n = 1; cp[n] == '#'; n++) 747 /* nothing */; 748 even = ((n % 2) == 0); 749 if (cp[n] != '[') { 750 cp += n; 751 if (even) 752 n = (n / 2); 753 else 754 n = (n / 2) + 1; 755 width[current] += n; 756 format_draw_many(&ctx[current], &sy, '#', n); 757 continue; 758 } 759 if (even) 760 cp += (n + 1); 761 else 762 cp += (n - 1); 763 if (sy.ignore) 764 continue; 765 format_draw_many(&ctx[current], &sy, '#', n / 2); 766 width[current] += (n / 2); 767 if (even) { 768 utf8_set(ud, '['); 769 screen_write_cell(&ctx[current], &sy.gc); 770 width[current]++; 771 } 772 continue; 773 } 774 775 /* Is this not a style? */ 776 if (cp[0] != '#' || cp[1] != '[' || sy.ignore) { 777 /* See if this is a UTF-8 character. */ 778 if ((more = utf8_open(ud, *cp)) == UTF8_MORE) { 779 while (*++cp != '\0' && more == UTF8_MORE) 780 more = utf8_append(ud, *cp); 781 if (more != UTF8_DONE) 782 cp -= ud->have; 783 } 784 785 /* Not a UTF-8 character - ASCII or not valid. */ 786 if (more != UTF8_DONE) { 787 if (*cp < 0x20 || *cp > 0x7e) { 788 /* Ignore nonprintable characters. */ 789 cp++; 790 continue; 791 } 792 utf8_set(ud, *cp); 793 cp++; 794 } 795 796 /* Draw the cell to the current screen. */ 797 screen_write_cell(&ctx[current], &sy.gc); 798 width[current] += ud->width; 799 continue; 800 } 801 802 /* This is a style. Work out where the end is and parse it. */ 803 end = format_skip(cp + 2, "]"); 804 if (end == NULL) { 805 log_debug("%s: no terminating ] at '%s'", __func__, 806 cp + 2); 807 TAILQ_FOREACH_SAFE(fr, &frs, entry, fr1) 808 format_free_range(&frs, fr); 809 goto out; 810 } 811 tmp = xstrndup(cp + 2, end - (cp + 2)); 812 style_copy(&saved_sy, &sy); 813 if (style_parse(&sy, ¤t_default, tmp) != 0) { 814 log_debug("%s: invalid style '%s'", __func__, tmp); 815 free(tmp); 816 cp = end + 1; 817 continue; 818 } 819 log_debug("%s: style '%s' -> '%s'", __func__, tmp, 820 style_tostring(&sy)); 821 free(tmp); 822 823 /* If this style has a fill colour, store it for later. */ 824 if (sy.fill != 8) 825 fill = sy.fill; 826 827 /* If this style pushed or popped the default, update it. */ 828 if (sy.default_type == STYLE_DEFAULT_PUSH) { 829 memcpy(¤t_default, &saved_sy.gc, 830 sizeof current_default); 831 sy.default_type = STYLE_DEFAULT_BASE; 832 } else if (sy.default_type == STYLE_DEFAULT_POP) { 833 memcpy(¤t_default, base, sizeof current_default); 834 sy.default_type = STYLE_DEFAULT_BASE; 835 } 836 837 /* Check the list state. */ 838 switch (sy.list) { 839 case STYLE_LIST_ON: 840 /* 841 * Entering the list, exiting a marker, or exiting the 842 * focus. 843 */ 844 if (list_state != 0) { 845 if (fr != NULL) { /* abort any region */ 846 free(fr); 847 fr = NULL; 848 } 849 list_state = 0; 850 list_align = sy.align; 851 } 852 853 /* End the focus if started. */ 854 if (focus_start != -1 && focus_end == -1) 855 focus_end = s[LIST].cx; 856 857 current = LIST; 858 break; 859 case STYLE_LIST_FOCUS: 860 /* Entering the focus. */ 861 if (list_state != 0) /* not inside the list */ 862 break; 863 if (focus_start == -1) /* focus already started */ 864 focus_start = s[LIST].cx; 865 break; 866 case STYLE_LIST_OFF: 867 /* Exiting or outside the list. */ 868 if (list_state == 0) { 869 if (fr != NULL) { /* abort any region */ 870 free(fr); 871 fr = NULL; 872 } 873 if (focus_start != -1 && focus_end == -1) 874 focus_end = s[LIST].cx; 875 876 map[list_align] = AFTER; 877 if (list_align == STYLE_ALIGN_LEFT) 878 map[STYLE_ALIGN_DEFAULT] = AFTER; 879 list_state = 1; 880 } 881 current = map[sy.align]; 882 break; 883 case STYLE_LIST_LEFT_MARKER: 884 /* Entering left marker. */ 885 if (list_state != 0) /* not inside the list */ 886 break; 887 if (s[LIST_LEFT].cx != 0) /* already have marker */ 888 break; 889 if (fr != NULL) { /* abort any region */ 890 free(fr); 891 fr = NULL; 892 } 893 if (focus_start != -1 && focus_end == -1) 894 focus_start = focus_end = -1; 895 current = LIST_LEFT; 896 break; 897 case STYLE_LIST_RIGHT_MARKER: 898 /* Entering right marker. */ 899 if (list_state != 0) /* not inside the list */ 900 break; 901 if (s[LIST_RIGHT].cx != 0) /* already have marker */ 902 break; 903 if (fr != NULL) { /* abort any region */ 904 free(fr); 905 fr = NULL; 906 } 907 if (focus_start != -1 && focus_end == -1) 908 focus_start = focus_end = -1; 909 current = LIST_RIGHT; 910 break; 911 } 912 if (current != last) { 913 log_debug("%s: change %s -> %s", __func__, 914 names[last], names[current]); 915 last = current; 916 } 917 918 /* 919 * Check if the range style has changed and if so end the 920 * current range and start a new one if needed. 921 */ 922 if (srs != NULL) { 923 if (fr != NULL && !format_is_type(fr, &sy)) { 924 if (s[current].cx != fr->start) { 925 fr->end = s[current].cx + 1; 926 TAILQ_INSERT_TAIL(&frs, fr, entry); 927 } else 928 free(fr); 929 fr = NULL; 930 } 931 if (fr == NULL && sy.range_type != STYLE_RANGE_NONE) { 932 fr = xcalloc(1, sizeof *fr); 933 fr->index = current; 934 935 fr->s = &s[current]; 936 fr->start = s[current].cx; 937 938 fr->type = sy.range_type; 939 fr->argument = sy.range_argument; 940 } 941 } 942 943 cp = end + 1; 944 } 945 free(fr); 946 947 for (i = 0; i < TOTAL; i++) { 948 screen_write_stop(&ctx[i]); 949 log_debug("%s: width %s is %u", __func__, names[i], width[i]); 950 } 951 if (focus_start != -1 && focus_end != -1) 952 log_debug("%s: focus %d-%d", __func__, focus_start, focus_end); 953 TAILQ_FOREACH(fr, &frs, entry) { 954 log_debug("%s: range %d|%u is %s %u-%u", __func__, fr->type, 955 fr->argument, names[fr->index], fr->start, fr->end); 956 } 957 958 /* Clear the available area. */ 959 if (fill != -1) { 960 memcpy(&gc, &grid_default_cell, sizeof gc); 961 gc.bg = fill; 962 for (i = 0; i < available; i++) 963 screen_write_putc(octx, &gc, ' '); 964 } 965 966 /* 967 * Draw the screens. How they are arranged depends on where the list 968 * appears. 969 */ 970 switch (list_align) { 971 case STYLE_ALIGN_DEFAULT: 972 /* No list. */ 973 format_draw_none(octx, available, ocx, ocy, &s[LEFT], 974 &s[CENTRE], &s[RIGHT], &s[ABSOLUTE_CENTRE], &frs); 975 break; 976 case STYLE_ALIGN_LEFT: 977 /* List is part of the left. */ 978 format_draw_left(octx, available, ocx, ocy, &s[LEFT], 979 &s[CENTRE], &s[RIGHT], &s[ABSOLUTE_CENTRE], &s[LIST], 980 &s[LIST_LEFT], &s[LIST_RIGHT], &s[AFTER], 981 focus_start, focus_end, &frs); 982 break; 983 case STYLE_ALIGN_CENTRE: 984 /* List is part of the centre. */ 985 format_draw_centre(octx, available, ocx, ocy, &s[LEFT], 986 &s[CENTRE], &s[RIGHT], &s[ABSOLUTE_CENTRE], &s[LIST], 987 &s[LIST_LEFT], &s[LIST_RIGHT], &s[AFTER], 988 focus_start, focus_end, &frs); 989 break; 990 case STYLE_ALIGN_RIGHT: 991 /* List is part of the right. */ 992 format_draw_right(octx, available, ocx, ocy, &s[LEFT], 993 &s[CENTRE], &s[RIGHT], &s[ABSOLUTE_CENTRE], &s[LIST], 994 &s[LIST_LEFT], &s[LIST_RIGHT], &s[AFTER], 995 focus_start, focus_end, &frs); 996 break; 997 case STYLE_ALIGN_ABSOLUTE_CENTRE: 998 /* List is in the centre of the entire horizontal space. */ 999 format_draw_absolute_centre(octx, available, ocx, ocy, &s[LEFT], 1000 &s[CENTRE], &s[RIGHT], &s[ABSOLUTE_CENTRE], &s[LIST], 1001 &s[LIST_LEFT], &s[LIST_RIGHT], &s[AFTER], 1002 focus_start, focus_end, &frs); 1003 break; 1004 } 1005 1006 /* Create ranges to return. */ 1007 TAILQ_FOREACH_SAFE(fr, &frs, entry, fr1) { 1008 sr = xcalloc(1, sizeof *sr); 1009 sr->type = fr->type; 1010 sr->argument = fr->argument; 1011 sr->start = fr->start; 1012 sr->end = fr->end; 1013 TAILQ_INSERT_TAIL(srs, sr, entry); 1014 1015 log_debug("%s: range %d|%u at %u-%u", __func__, sr->type, 1016 sr->argument, sr->start, sr->end); 1017 1018 format_free_range(&frs, fr); 1019 } 1020 1021 out: 1022 /* Free the screens. */ 1023 for (i = 0; i < TOTAL; i++) 1024 screen_free(&s[i]); 1025 1026 /* Restore the original cursor position. */ 1027 screen_write_cursormove(octx, ocx, ocy, 0); 1028 } 1029 1030 /* Get width, taking #[] into account. */ 1031 u_int 1032 format_width(const char *expanded) 1033 { 1034 const char *cp, *end; 1035 u_int n, leading_width, width = 0; 1036 struct utf8_data ud; 1037 enum utf8_state more; 1038 1039 cp = expanded; 1040 while (*cp != '\0') { 1041 if (*cp == '#') { 1042 end = format_leading_hashes(cp, &n, &leading_width); 1043 width += leading_width; 1044 cp = end; 1045 if (*cp == '#') { 1046 end = format_skip(cp + 2, "]"); 1047 if (end == NULL) 1048 return (0); 1049 cp = end + 1; 1050 } 1051 } else if ((more = utf8_open(&ud, *cp)) == UTF8_MORE) { 1052 while (*++cp != '\0' && more == UTF8_MORE) 1053 more = utf8_append(&ud, *cp); 1054 if (more == UTF8_DONE) 1055 width += ud.width; 1056 else 1057 cp -= ud.have; 1058 } else if (*cp > 0x1f && *cp < 0x7f) { 1059 width++; 1060 cp++; 1061 } else 1062 cp++; 1063 } 1064 return (width); 1065 } 1066 1067 /* 1068 * Trim on the left, taking #[] into account. Note, we copy the whole set of 1069 * unescaped #s, but only add their escaped size to width. This is because the 1070 * format_draw function will actually do the escaping when it runs 1071 */ 1072 char * 1073 format_trim_left(const char *expanded, u_int limit) 1074 { 1075 char *copy, *out; 1076 const char *cp = expanded, *end; 1077 u_int n, width = 0, leading_width; 1078 struct utf8_data ud; 1079 enum utf8_state more; 1080 1081 out = copy = xcalloc(1, strlen(expanded) + 1); 1082 while (*cp != '\0') { 1083 if (width >= limit) 1084 break; 1085 if (*cp == '#') { 1086 end = format_leading_hashes(cp, &n, &leading_width); 1087 if (leading_width > limit - width) 1088 leading_width = limit - width; 1089 if (leading_width != 0) { 1090 if (n == 1) 1091 *out++ = '#'; 1092 else { 1093 memset(out, '#', 2 * leading_width); 1094 out += 2 * leading_width; 1095 } 1096 width += leading_width; 1097 } 1098 cp = end; 1099 if (*cp == '#') { 1100 end = format_skip(cp + 2, "]"); 1101 if (end == NULL) 1102 break; 1103 memcpy(out, cp, end + 1 - cp); 1104 out += (end + 1 - cp); 1105 cp = end + 1; 1106 } 1107 } else if ((more = utf8_open(&ud, *cp)) == UTF8_MORE) { 1108 while (*++cp != '\0' && more == UTF8_MORE) 1109 more = utf8_append(&ud, *cp); 1110 if (more == UTF8_DONE) { 1111 if (width + ud.width <= limit) { 1112 memcpy(out, ud.data, ud.size); 1113 out += ud.size; 1114 } 1115 width += ud.width; 1116 } else { 1117 cp -= ud.have; 1118 cp++; 1119 } 1120 } else if (*cp > 0x1f && *cp < 0x7f) { 1121 if (width + 1 <= limit) 1122 *out++ = *cp; 1123 width++; 1124 cp++; 1125 } else 1126 cp++; 1127 } 1128 *out = '\0'; 1129 return (copy); 1130 } 1131 1132 /* Trim on the right, taking #[] into account. */ 1133 char * 1134 format_trim_right(const char *expanded, u_int limit) 1135 { 1136 char *copy, *out; 1137 const char *cp = expanded, *end; 1138 u_int width = 0, total_width, skip, n; 1139 u_int leading_width, copy_width; 1140 struct utf8_data ud; 1141 enum utf8_state more; 1142 1143 total_width = format_width(expanded); 1144 if (total_width <= limit) 1145 return (xstrdup(expanded)); 1146 skip = total_width - limit; 1147 1148 out = copy = xcalloc(1, strlen(expanded) + 1); 1149 while (*cp != '\0') { 1150 if (*cp == '#') { 1151 end = format_leading_hashes(cp, &n, &leading_width); 1152 if (width <= skip) { 1153 if (skip - width >= leading_width) 1154 copy_width = 0; 1155 else 1156 copy_width -= (skip - width); 1157 } else 1158 copy_width = leading_width; 1159 if (copy_width != 0) { 1160 if (n == 1) 1161 *out++ = '#'; 1162 else { 1163 memset(out, '#', 2 * copy_width); 1164 out += 2 * copy_width; 1165 } 1166 } 1167 width += leading_width; 1168 cp = end; 1169 if (*cp == '#') { 1170 end = format_skip(cp + 2, "]"); 1171 if (end == NULL) 1172 break; 1173 memcpy(out, cp, end + 1 - cp); 1174 out += (end + 1 - cp); 1175 cp = end + 1; 1176 } 1177 } else if ((more = utf8_open(&ud, *cp)) == UTF8_MORE) { 1178 while (*++cp != '\0' && more == UTF8_MORE) 1179 more = utf8_append(&ud, *cp); 1180 if (more == UTF8_DONE) { 1181 if (width >= skip) { 1182 memcpy(out, ud.data, ud.size); 1183 out += ud.size; 1184 } 1185 width += ud.width; 1186 } else { 1187 cp -= ud.have; 1188 cp++; 1189 } 1190 } else if (*cp > 0x1f && *cp < 0x7f) { 1191 if (width >= skip) 1192 *out++ = *cp; 1193 width++; 1194 cp++; 1195 } else 1196 cp++; 1197 } 1198 *out = '\0'; 1199 return (copy); 1200 } 1201