1 /* $OpenBSD$ */ 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 - 1, ocy, 0); 146 screen_write_fast_copy(octx, list_right, 0, 0, list_right->cx, 147 1); 148 width -= list_right->cx; 149 } 150 151 /* Draw the list screen itself. */ 152 format_draw_put(octx, ocx, ocy, list, frs, offset, start, width); 153 } 154 155 /* Draw format with no list. */ 156 static void 157 format_draw_none(struct screen_write_ctx *octx, u_int available, u_int ocx, 158 u_int ocy, struct screen *left, struct screen *centre, struct screen *right, 159 struct format_ranges *frs) 160 { 161 u_int width_left, width_centre, width_right; 162 163 width_left = left->cx; 164 width_centre = centre->cx; 165 width_right = right->cx; 166 167 /* 168 * Try to keep as much of the left and right as possible at the expense 169 * of the centre. 170 */ 171 while (width_left + width_centre + width_right > available) { 172 if (width_centre > 0) 173 width_centre--; 174 else if (width_right > 0) 175 width_right--; 176 else 177 width_left--; 178 } 179 180 /* Write left. */ 181 format_draw_put(octx, ocx, ocy, left, frs, 0, 0, width_left); 182 183 /* Write right at available - width_right. */ 184 format_draw_put(octx, ocx, ocy, right, frs, 185 available - width_right, 186 right->cx - width_right, 187 width_right); 188 189 /* 190 * Write centre halfway between 191 * width_left 192 * and 193 * available - width_right. 194 */ 195 format_draw_put(octx, ocx, ocy, centre, frs, 196 width_left 197 + ((available - width_right) - width_left) / 2 198 - width_centre / 2, 199 centre->cx / 2 - width_centre / 2, 200 width_centre); 201 } 202 203 /* Draw format with list on the left. */ 204 static void 205 format_draw_left(struct screen_write_ctx *octx, u_int available, u_int ocx, 206 u_int ocy, struct screen *left, struct screen *centre, struct screen *right, 207 struct screen *list, struct screen *list_left, struct screen *list_right, 208 struct screen *after, int focus_start, int focus_end, 209 struct format_ranges *frs) 210 { 211 u_int width_left, width_centre, width_right; 212 u_int width_list, width_after; 213 struct screen_write_ctx ctx; 214 215 width_left = left->cx; 216 width_centre = centre->cx; 217 width_right = right->cx; 218 width_list = list->cx; 219 width_after = after->cx; 220 221 /* 222 * Trim first the centre, then the list, then the right, then after the 223 * list, then the left. 224 */ 225 while (width_left + 226 width_centre + 227 width_right + 228 width_list + 229 width_after > available) { 230 if (width_centre > 0) 231 width_centre--; 232 else if (width_list > 0) 233 width_list--; 234 else if (width_right > 0) 235 width_right--; 236 else if (width_after > 0) 237 width_after--; 238 else 239 width_left--; 240 } 241 242 /* If there is no list left, pass off to the no list function. */ 243 if (width_list == 0) { 244 screen_write_start(&ctx, NULL, left); 245 screen_write_fast_copy(&ctx, after, 0, 0, width_after, 1); 246 screen_write_stop(&ctx); 247 248 format_draw_none(octx, available, ocx, ocy, left, centre, 249 right, frs); 250 return; 251 } 252 253 /* Write left at 0. */ 254 format_draw_put(octx, ocx, ocy, left, frs, 0, 0, width_left); 255 256 /* Write right at available - width_right. */ 257 format_draw_put(octx, ocx, ocy, right, frs, 258 available - width_right, 259 right->cx - width_right, 260 width_right); 261 262 /* Write after at width_left + width_list. */ 263 format_draw_put(octx, ocx, ocy, after, frs, 264 width_left + width_list, 265 0, 266 width_after); 267 268 /* 269 * Write centre halfway between 270 * width_left + width_list + width_after 271 * and 272 * available - width_right. 273 */ 274 format_draw_put(octx, ocx, ocy, centre, frs, 275 (width_left + width_list + width_after) 276 + ((available - width_right) 277 - (width_left + width_list + width_after)) / 2 278 - width_centre / 2, 279 centre->cx / 2 - width_centre / 2, 280 width_centre); 281 282 /* 283 * The list now goes from 284 * width_left 285 * to 286 * width_left + width_list. 287 * If there is no focus given, keep the left in focus. 288 */ 289 if (focus_start == -1 || focus_end == -1) 290 focus_start = focus_end = 0; 291 format_draw_put_list(octx, ocx, ocy, width_left, width_list, list, 292 list_left, list_right, focus_start, focus_end, frs); 293 } 294 295 /* Draw format with list in the centre. */ 296 static void 297 format_draw_centre(struct screen_write_ctx *octx, u_int available, u_int ocx, 298 u_int ocy, struct screen *left, struct screen *centre, struct screen *right, 299 struct screen *list, struct screen *list_left, struct screen *list_right, 300 struct screen *after, int focus_start, int focus_end, 301 struct format_ranges *frs) 302 { 303 u_int width_left, width_centre, width_right; 304 u_int width_list, width_after, middle; 305 struct screen_write_ctx ctx; 306 307 width_left = left->cx; 308 width_centre = centre->cx; 309 width_right = right->cx; 310 width_list = list->cx; 311 width_after = after->cx; 312 313 /* 314 * Trim first the list, then after the list, then the centre, then the 315 * right, then the left. 316 */ 317 while (width_left + 318 width_centre + 319 width_right + 320 width_list + 321 width_after > available) { 322 if (width_list > 0) 323 width_list--; 324 else if (width_after > 0) 325 width_after--; 326 else if (width_centre > 0) 327 width_centre--; 328 else if (width_right > 0) 329 width_right--; 330 else 331 width_left--; 332 } 333 334 /* If there is no list left, pass off to the no list function. */ 335 if (width_list == 0) { 336 screen_write_start(&ctx, NULL, centre); 337 screen_write_fast_copy(&ctx, after, 0, 0, width_after, 1); 338 screen_write_stop(&ctx); 339 340 format_draw_none(octx, available, ocx, ocy, left, centre, 341 right, frs); 342 return; 343 } 344 345 /* Write left at 0. */ 346 format_draw_put(octx, ocx, ocy, left, frs, 0, 0, width_left); 347 348 /* Write after at available - width_after. */ 349 format_draw_put(octx, ocx, ocy, after, frs, 350 available - width_after, 351 after->cx - width_after, 352 width_after); 353 354 /* Write right at available - width_right. */ 355 format_draw_put(octx, ocx, ocy, right, frs, 356 available - width_right, 357 right->cx - width_right, 358 width_right); 359 360 /* 361 * All three centre sections are offset from the middle of the 362 * available space. 363 */ 364 middle = (width_left + ((available - width_right) - width_left) / 2); 365 366 /* 367 * Write centre at 368 * middle - width_list / 2 - width_centre. 369 */ 370 format_draw_put(octx, ocx, ocy, centre, frs, 371 middle - width_list / 2 - width_centre, 372 0, 373 width_centre); 374 375 /* 376 * Write after at 377 * middle + width_list / 2 - width_centre. 378 */ 379 format_draw_put(octx, ocx, ocy, after, frs, 380 middle + width_list / 2, 381 0, 382 width_after); 383 384 /* 385 * The list now goes from 386 * middle - width_list / 2 387 * to 388 * middle + width_list / 2 389 * If there is no focus given, keep the centre in focus. 390 */ 391 if (focus_start == -1 || focus_end == -1) 392 focus_start = focus_end = list->cx / 2; 393 format_draw_put_list(octx, ocx, ocy, middle - width_list / 2, 394 width_list, list, list_left, list_right, focus_start, focus_end, 395 frs); 396 } 397 398 /* Draw format with list on the right. */ 399 static void 400 format_draw_right(struct screen_write_ctx *octx, u_int available, u_int ocx, 401 u_int ocy, struct screen *left, struct screen *centre, struct screen *right, 402 struct screen *list, struct screen *list_left, struct screen *list_right, 403 struct screen *after, int focus_start, int focus_end, 404 struct format_ranges *frs) 405 { 406 u_int width_left, width_centre, width_right; 407 u_int width_list, width_after; 408 struct screen_write_ctx ctx; 409 410 width_left = left->cx; 411 width_centre = centre->cx; 412 width_right = right->cx; 413 width_list = list->cx; 414 width_after = after->cx; 415 416 /* 417 * Trim first the centre, then the list, then the right, then 418 * after the list, then the left. 419 */ 420 while (width_left + 421 width_centre + 422 width_right + 423 width_list + 424 width_after > available) { 425 if (width_centre > 0) 426 width_centre--; 427 else if (width_list > 0) 428 width_list--; 429 else if (width_right > 0) 430 width_right--; 431 else if (width_after > 0) 432 width_after--; 433 else 434 width_left--; 435 } 436 437 /* If there is no list left, pass off to the no list function. */ 438 if (width_list == 0) { 439 screen_write_start(&ctx, NULL, right); 440 screen_write_fast_copy(&ctx, after, 0, 0, width_after, 1); 441 screen_write_stop(&ctx); 442 443 format_draw_none(octx, available, ocx, ocy, left, centre, 444 right, frs); 445 return; 446 } 447 448 /* Write left at 0. */ 449 format_draw_put(octx, ocx, ocy, left, frs, 0, 0, width_left); 450 451 /* Write after at available - width_after. */ 452 format_draw_put(octx, ocx, ocy, after, frs, 453 available - width_after, 454 after->cx - width_after, 455 width_after); 456 457 /* 458 * Write right at 459 * available - width_right - width_list - width_after. 460 */ 461 format_draw_put(octx, ocx, ocy, right, frs, 462 available - width_right - width_list - width_after, 463 0, 464 width_right); 465 466 /* 467 * Write centre halfway between 468 * width_left 469 * and 470 * available - width_right - width_list - width_after. 471 */ 472 format_draw_put(octx, ocx, ocy, centre, frs, 473 width_left 474 + ((available - width_right - width_list - width_after) 475 - width_left) / 2 476 - width_centre / 2, 477 centre->cx / 2 - width_centre / 2, 478 width_centre); 479 480 /* 481 * The list now goes from 482 * available - width_list - width_after 483 * to 484 * available - width_after 485 * If there is no focus given, keep the right in focus. 486 */ 487 if (focus_start == -1 || focus_end == -1) 488 focus_start = focus_end = 0; 489 format_draw_put_list(octx, ocx, ocy, available - width_list - 490 width_after, width_list, list, list_left, list_right, focus_start, 491 focus_end, frs); 492 } 493 494 /* Draw a format to a screen. */ 495 void 496 format_draw(struct screen_write_ctx *octx, const struct grid_cell *base, 497 u_int available, const char *expanded, struct style_ranges *srs) 498 { 499 enum { LEFT, 500 CENTRE, 501 RIGHT, 502 LIST, 503 LIST_LEFT, 504 LIST_RIGHT, 505 AFTER, 506 TOTAL } current = LEFT, last = LEFT; 507 const char *names[] = { "LEFT", 508 "CENTRE", 509 "RIGHT", 510 "LIST", 511 "LIST_LEFT", 512 "LIST_RIGHT", 513 "AFTER" }; 514 size_t size = strlen(expanded); 515 struct screen *os = octx->s, s[TOTAL]; 516 struct screen_write_ctx ctx[TOTAL]; 517 u_int ocx = os->cx, ocy = os->cy, i, width[TOTAL]; 518 u_int map[] = { LEFT, LEFT, CENTRE, RIGHT }; 519 int focus_start = -1, focus_end = -1; 520 int list_state = -1; 521 enum style_align list_align = STYLE_ALIGN_DEFAULT; 522 struct style sy; 523 struct utf8_data *ud = &sy.gc.data; 524 const char *cp, *end; 525 enum utf8_state more; 526 char *tmp; 527 struct format_range *fr = NULL, *fr1; 528 struct format_ranges frs; 529 struct style_range *sr; 530 531 style_set(&sy, base); 532 TAILQ_INIT(&frs); 533 log_debug("%s: %s", __func__, expanded); 534 535 /* 536 * We build three screens for left, right, centre alignment, one for 537 * the list, one for anything after the list and two for the list left 538 * and right markers. 539 */ 540 for (i = 0; i < TOTAL; i++) { 541 screen_init(&s[i], size, 1, 0); 542 screen_write_start(&ctx[i], NULL, &s[i]); 543 screen_write_clearendofline(&ctx[i], base->bg); 544 width[i] = 0; 545 } 546 547 /* 548 * Walk the string and add to the corresponding screens, 549 * parsing styles as we go. 550 */ 551 cp = expanded; 552 while (*cp != '\0') { 553 if (cp[0] != '#' || cp[1] != '[') { 554 /* See if this is a UTF-8 character. */ 555 if ((more = utf8_open(ud, *cp)) == UTF8_MORE) { 556 while (*++cp != '\0' && more == UTF8_MORE) 557 more = utf8_append(ud, *cp); 558 if (more != UTF8_DONE) 559 cp -= ud->have; 560 } 561 562 /* Not a UTF-8 character - ASCII or not valid. */ 563 if (more != UTF8_DONE) { 564 if (*cp < 0x20 || *cp > 0x7e) { 565 /* Ignore nonprintable characters. */ 566 cp++; 567 continue; 568 } 569 utf8_set(ud, *cp); 570 cp++; 571 } 572 573 /* Draw the cell to th current screen. */ 574 screen_write_cell(&ctx[current], &sy.gc); 575 width[current] += ud->width; 576 continue; 577 } 578 579 /* This is a style. Work out where the end is and parse it. */ 580 end = format_skip(cp + 2, "]"); 581 if (end == NULL) { 582 log_debug("%s: no terminating ] at '%s'", __func__, 583 cp + 2); 584 TAILQ_FOREACH_SAFE(fr, &frs, entry, fr1) 585 format_free_range(&frs, fr); 586 goto out; 587 } 588 tmp = xstrndup(cp + 2, end - (cp + 2)); 589 if (style_parse(&sy, base, tmp) != 0) { 590 log_debug("%s: invalid style '%s'", __func__, tmp); 591 free(tmp); 592 cp = end + 1; 593 continue; 594 } 595 log_debug("%s: style '%s' -> '%s'", __func__, tmp, 596 style_tostring(&sy)); 597 free(tmp); 598 599 /* Check the list state. */ 600 switch (sy.list) { 601 case STYLE_LIST_ON: 602 /* 603 * Entering the list, exiting a marker, or exiting the 604 * focus. 605 */ 606 if (list_state != 0) { 607 if (fr != NULL) { /* abort any region */ 608 free(fr); 609 fr = NULL; 610 } 611 list_state = 0; 612 list_align = sy.align; 613 } 614 615 /* End the focus if started. */ 616 if (focus_start != -1 && focus_end == -1) 617 focus_end = s[LIST].cx; 618 619 current = LIST; 620 break; 621 case STYLE_LIST_FOCUS: 622 /* Entering the focus. */ 623 if (list_state != 0) /* not inside the list */ 624 break; 625 if (focus_start == -1) /* focus already started */ 626 focus_start = s[LIST].cx; 627 break; 628 case STYLE_LIST_OFF: 629 /* Exiting or outside the list. */ 630 if (list_state == 0) { 631 if (fr != NULL) { /* abort any region */ 632 free(fr); 633 fr = NULL; 634 } 635 if (focus_start != -1 && focus_end == -1) 636 focus_end = s[LIST].cx; 637 638 map[list_align] = AFTER; 639 if (list_align == STYLE_ALIGN_LEFT) 640 map[STYLE_ALIGN_DEFAULT] = AFTER; 641 list_state = 1; 642 } 643 current = map[sy.align]; 644 break; 645 case STYLE_LIST_LEFT_MARKER: 646 /* Entering left marker. */ 647 if (list_state != 0) /* not inside the list */ 648 break; 649 if (s[LIST_LEFT].cx != 0) /* already have marker */ 650 break; 651 if (fr != NULL) { /* abort any region */ 652 free(fr); 653 fr = NULL; 654 } 655 if (focus_start != -1 && focus_end == -1) 656 focus_start = focus_end = -1; 657 current = LIST_LEFT; 658 break; 659 case STYLE_LIST_RIGHT_MARKER: 660 /* Entering right marker. */ 661 if (list_state != 0) /* not inside the list */ 662 break; 663 if (s[LIST_RIGHT].cx != 0) /* already have marker */ 664 break; 665 if (fr != NULL) { /* abort any region */ 666 free(fr); 667 fr = NULL; 668 } 669 if (focus_start != -1 && focus_end == -1) 670 focus_start = focus_end = -1; 671 current = LIST_RIGHT; 672 break; 673 } 674 if (current != last) { 675 log_debug("%s: change %s -> %s", __func__, 676 names[last], names[current]); 677 last = current; 678 } 679 680 /* 681 * Check if the range style has changed and if so end the 682 * current range and start a new one if needed. 683 */ 684 if (srs != NULL) { 685 if (fr != NULL && !format_is_type(fr, &sy)) { 686 if (s[current].cx != fr->start) { 687 fr->end = s[current].cx + 1; 688 TAILQ_INSERT_TAIL(&frs, fr, entry); 689 } else 690 free(fr); 691 fr = NULL; 692 } 693 if (fr == NULL && sy.range_type != STYLE_RANGE_NONE) { 694 fr = xcalloc(1, sizeof *fr); 695 fr->index = current; 696 697 fr->s = &s[current]; 698 fr->start = s[current].cx; 699 700 fr->type = sy.range_type; 701 fr->argument = sy.range_argument; 702 } 703 } 704 705 cp = end + 1; 706 } 707 free(fr); 708 709 for (i = 0; i < TOTAL; i++) { 710 screen_write_stop(&ctx[i]); 711 log_debug("%s: width %s is %u", __func__, names[i], width[i]); 712 } 713 if (focus_start != -1 && focus_end != -1) 714 log_debug("%s: focus %d-%d", __func__, focus_start, focus_end); 715 TAILQ_FOREACH(fr, &frs, entry) { 716 log_debug("%s: range %d|%u is %s %u-%u", __func__, fr->type, 717 fr->argument, names[fr->index], fr->start, fr->end); 718 } 719 720 /* 721 * Draw the screens. How they are arranged depends on where the list 722 * appearsq. 723 */ 724 switch (list_align) { 725 case STYLE_ALIGN_DEFAULT: 726 /* No list. */ 727 format_draw_none(octx, available, ocx, ocy, &s[LEFT], 728 &s[CENTRE], &s[RIGHT], &frs); 729 break; 730 case STYLE_ALIGN_LEFT: 731 /* List is part of the left. */ 732 format_draw_left(octx, available, ocx, ocy, &s[LEFT], 733 &s[CENTRE], &s[RIGHT], &s[LIST], &s[LIST_LEFT], 734 &s[LIST_RIGHT], &s[AFTER], focus_start, focus_end, &frs); 735 break; 736 case STYLE_ALIGN_CENTRE: 737 /* List is part of the centre. */ 738 format_draw_centre(octx, available, ocx, ocy, &s[LEFT], 739 &s[CENTRE], &s[RIGHT], &s[LIST], &s[LIST_LEFT], 740 &s[LIST_RIGHT], &s[AFTER], focus_start, focus_end, &frs); 741 break; 742 case STYLE_ALIGN_RIGHT: 743 /* List is part of the right. */ 744 format_draw_right(octx, available, ocx, ocy, &s[LEFT], 745 &s[CENTRE], &s[RIGHT], &s[LIST], &s[LIST_LEFT], 746 &s[LIST_RIGHT], &s[AFTER], focus_start, focus_end, &frs); 747 break; 748 } 749 750 /* Create ranges to return. */ 751 TAILQ_FOREACH_SAFE(fr, &frs, entry, fr1) { 752 sr = xcalloc(1, sizeof *sr); 753 sr->type = fr->type; 754 sr->argument = fr->argument; 755 sr->start = fr->start; 756 sr->end = fr->end; 757 TAILQ_INSERT_TAIL(srs, sr, entry); 758 759 log_debug("%s: range %d|%u at %u-%u", __func__, sr->type, 760 sr->argument, sr->start, sr->end); 761 762 format_free_range(&frs, fr); 763 } 764 765 out: 766 /* Free the screens. */ 767 for (i = 0; i < TOTAL; i++) 768 screen_free(&s[i]); 769 770 /* Restore the original cursor position. */ 771 screen_write_cursormove(octx, ocx, ocy, 0); 772 } 773 774 /* Get width, taking #[] into account. */ 775 u_int 776 format_width(const char *expanded) 777 { 778 const char *cp, *end; 779 u_int width = 0; 780 struct utf8_data ud; 781 enum utf8_state more; 782 783 cp = expanded; 784 while (*cp != '\0') { 785 if (cp[0] == '#' && cp[1] == '[') { 786 end = format_skip(cp + 2, "]"); 787 if (end == NULL) 788 return 0; 789 cp = end + 1; 790 } else if ((more = utf8_open(&ud, *cp)) == UTF8_MORE) { 791 while (*++cp != '\0' && more == UTF8_MORE) 792 more = utf8_append(&ud, *cp); 793 if (more == UTF8_DONE) 794 width += ud.width; 795 else 796 cp -= ud.have; 797 } else if (*cp > 0x1f && *cp < 0x7f) { 798 width++; 799 cp++; 800 } 801 } 802 return (width); 803 } 804 805 /* Trim on the left, taking #[] into account. */ 806 char * 807 format_trim_left(const char *expanded, u_int limit) 808 { 809 char *copy, *out; 810 const char *cp = expanded, *end; 811 u_int width = 0; 812 struct utf8_data ud; 813 enum utf8_state more; 814 815 out = copy = xmalloc(strlen(expanded) + 1); 816 while (*cp != '\0') { 817 if (cp[0] == '#' && cp[1] == '[') { 818 end = format_skip(cp + 2, "]"); 819 if (end == NULL) 820 break; 821 memcpy(out, cp, end + 1 - cp); 822 out += (end + 1 - cp); 823 cp = end + 1; 824 } else if ((more = utf8_open(&ud, *cp)) == UTF8_MORE) { 825 while (*++cp != '\0' && more == UTF8_MORE) 826 more = utf8_append(&ud, *cp); 827 if (more == UTF8_DONE) { 828 if (width + ud.width <= limit) { 829 memcpy(out, ud.data, ud.size); 830 out += ud.size; 831 } 832 width += ud.width; 833 } else 834 cp -= ud.have; 835 } else if (*cp > 0x1f && *cp < 0x7f) { 836 if (width + 1 <= limit) 837 *out++ = *cp; 838 width++; 839 cp++; 840 } else 841 cp++; 842 } 843 *out = '\0'; 844 return (copy); 845 } 846 847 /* Trim on the right, taking #[] into account. */ 848 char * 849 format_trim_right(const char *expanded, u_int limit) 850 { 851 char *copy, *out; 852 const char *cp = expanded, *end; 853 u_int width = 0, total_width, skip; 854 struct utf8_data ud; 855 enum utf8_state more; 856 857 total_width = format_width(expanded); 858 if (total_width <= limit) 859 return (xstrdup(expanded)); 860 skip = total_width - limit; 861 862 out = copy = xmalloc(strlen(expanded) + 1); 863 while (*cp != '\0') { 864 if (cp[0] == '#' && cp[1] == '[') { 865 end = format_skip(cp + 2, "]"); 866 if (end == NULL) 867 break; 868 memcpy(out, cp, end + 1 - cp); 869 out += (end + 1 - cp); 870 cp = end + 1; 871 } else if ((more = utf8_open(&ud, *cp)) == UTF8_MORE) { 872 while (*++cp != '\0' && more == UTF8_MORE) 873 more = utf8_append(&ud, *cp); 874 if (more == UTF8_DONE) { 875 if (width >= skip) { 876 memcpy(out, ud.data, ud.size); 877 out += ud.size; 878 } 879 width += ud.width; 880 } else 881 cp -= ud.have; 882 } else if (*cp > 0x1f && *cp < 0x7f) { 883 if (width >= skip) 884 *out++ = *cp; 885 width++; 886 cp++; 887 } else 888 cp++; 889 } 890 *out = '\0'; 891 return (copy); 892 } 893