1 /* $OpenBSD: format-draw.c,v 1.9 2019/05/23 14:44:33 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 - 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 right at available - width_right. */ 349 format_draw_put(octx, ocx, ocy, right, frs, 350 available - width_right, 351 right->cx - width_right, 352 width_right); 353 354 /* 355 * All three centre sections are offset from the middle of the 356 * available space. 357 */ 358 middle = (width_left + ((available - width_right) - width_left) / 2); 359 360 /* 361 * Write centre at 362 * middle - width_list / 2 - width_centre. 363 */ 364 format_draw_put(octx, ocx, ocy, centre, frs, 365 middle - width_list / 2 - width_centre, 366 0, 367 width_centre); 368 369 /* 370 * Write after at 371 * middle - width_list / 2 + width_list 372 */ 373 format_draw_put(octx, ocx, ocy, after, frs, 374 middle - width_list / 2 + width_list, 375 0, 376 width_after); 377 378 /* 379 * The list now goes from 380 * middle - width_list / 2 381 * to 382 * middle + width_list / 2 383 * If there is no focus given, keep the centre in focus. 384 */ 385 if (focus_start == -1 || focus_end == -1) 386 focus_start = focus_end = list->cx / 2; 387 format_draw_put_list(octx, ocx, ocy, middle - width_list / 2, 388 width_list, list, list_left, list_right, focus_start, focus_end, 389 frs); 390 } 391 392 /* Draw format with list on the right. */ 393 static void 394 format_draw_right(struct screen_write_ctx *octx, u_int available, u_int ocx, 395 u_int ocy, struct screen *left, struct screen *centre, struct screen *right, 396 struct screen *list, struct screen *list_left, struct screen *list_right, 397 struct screen *after, int focus_start, int focus_end, 398 struct format_ranges *frs) 399 { 400 u_int width_left, width_centre, width_right; 401 u_int width_list, width_after; 402 struct screen_write_ctx ctx; 403 404 width_left = left->cx; 405 width_centre = centre->cx; 406 width_right = right->cx; 407 width_list = list->cx; 408 width_after = after->cx; 409 410 /* 411 * Trim first the centre, then the list, then the right, then 412 * after the list, then the left. 413 */ 414 while (width_left + 415 width_centre + 416 width_right + 417 width_list + 418 width_after > available) { 419 if (width_centre > 0) 420 width_centre--; 421 else if (width_list > 0) 422 width_list--; 423 else if (width_right > 0) 424 width_right--; 425 else if (width_after > 0) 426 width_after--; 427 else 428 width_left--; 429 } 430 431 /* If there is no list left, pass off to the no list function. */ 432 if (width_list == 0) { 433 screen_write_start(&ctx, NULL, right); 434 screen_write_fast_copy(&ctx, after, 0, 0, width_after, 1); 435 screen_write_stop(&ctx); 436 437 format_draw_none(octx, available, ocx, ocy, left, centre, 438 right, frs); 439 return; 440 } 441 442 /* Write left at 0. */ 443 format_draw_put(octx, ocx, ocy, left, frs, 0, 0, width_left); 444 445 /* Write after at available - width_after. */ 446 format_draw_put(octx, ocx, ocy, after, frs, 447 available - width_after, 448 after->cx - width_after, 449 width_after); 450 451 /* 452 * Write right at 453 * available - width_right - width_list - width_after. 454 */ 455 format_draw_put(octx, ocx, ocy, right, frs, 456 available - width_right - width_list - width_after, 457 0, 458 width_right); 459 460 /* 461 * Write centre halfway between 462 * width_left 463 * and 464 * available - width_right - width_list - width_after. 465 */ 466 format_draw_put(octx, ocx, ocy, centre, frs, 467 width_left 468 + ((available - width_right - width_list - width_after) 469 - width_left) / 2 470 - width_centre / 2, 471 centre->cx / 2 - width_centre / 2, 472 width_centre); 473 474 /* 475 * The list now goes from 476 * available - width_list - width_after 477 * to 478 * available - width_after 479 * If there is no focus given, keep the right in focus. 480 */ 481 if (focus_start == -1 || focus_end == -1) 482 focus_start = focus_end = 0; 483 format_draw_put_list(octx, ocx, ocy, available - width_list - 484 width_after, width_list, list, list_left, list_right, focus_start, 485 focus_end, frs); 486 } 487 488 /* Draw a format to a screen. */ 489 void 490 format_draw(struct screen_write_ctx *octx, const struct grid_cell *base, 491 u_int available, const char *expanded, struct style_ranges *srs) 492 { 493 enum { LEFT, 494 CENTRE, 495 RIGHT, 496 LIST, 497 LIST_LEFT, 498 LIST_RIGHT, 499 AFTER, 500 TOTAL } current = LEFT, last = LEFT; 501 const char *names[] = { "LEFT", 502 "CENTRE", 503 "RIGHT", 504 "LIST", 505 "LIST_LEFT", 506 "LIST_RIGHT", 507 "AFTER" }; 508 size_t size = strlen(expanded); 509 struct screen *os = octx->s, s[TOTAL]; 510 struct screen_write_ctx ctx[TOTAL]; 511 u_int ocx = os->cx, ocy = os->cy, i, width[TOTAL]; 512 u_int map[] = { LEFT, LEFT, CENTRE, RIGHT }; 513 int focus_start = -1, focus_end = -1; 514 int list_state = -1; 515 enum style_align list_align = STYLE_ALIGN_DEFAULT; 516 struct style sy; 517 struct utf8_data *ud = &sy.gc.data; 518 const char *cp, *end; 519 enum utf8_state more; 520 char *tmp; 521 struct format_range *fr = NULL, *fr1; 522 struct format_ranges frs; 523 struct style_range *sr; 524 525 style_set(&sy, base); 526 TAILQ_INIT(&frs); 527 log_debug("%s: %s", __func__, expanded); 528 529 /* 530 * We build three screens for left, right, centre alignment, one for 531 * the list, one for anything after the list and two for the list left 532 * and right markers. 533 */ 534 for (i = 0; i < TOTAL; i++) { 535 screen_init(&s[i], size, 1, 0); 536 screen_write_start(&ctx[i], NULL, &s[i]); 537 screen_write_clearendofline(&ctx[i], base->bg); 538 width[i] = 0; 539 } 540 541 /* 542 * Walk the string and add to the corresponding screens, 543 * parsing styles as we go. 544 */ 545 cp = expanded; 546 while (*cp != '\0') { 547 if (cp[0] != '#' || cp[1] != '[') { 548 /* See if this is a UTF-8 character. */ 549 if ((more = utf8_open(ud, *cp)) == UTF8_MORE) { 550 while (*++cp != '\0' && more == UTF8_MORE) 551 more = utf8_append(ud, *cp); 552 if (more != UTF8_DONE) 553 cp -= ud->have; 554 } 555 556 /* Not a UTF-8 character - ASCII or not valid. */ 557 if (more != UTF8_DONE) { 558 if (*cp < 0x20 || *cp > 0x7e) { 559 /* Ignore nonprintable characters. */ 560 cp++; 561 continue; 562 } 563 utf8_set(ud, *cp); 564 cp++; 565 } 566 567 /* Draw the cell to th current screen. */ 568 screen_write_cell(&ctx[current], &sy.gc); 569 width[current] += ud->width; 570 continue; 571 } 572 573 /* This is a style. Work out where the end is and parse it. */ 574 end = format_skip(cp + 2, "]"); 575 if (end == NULL) { 576 log_debug("%s: no terminating ] at '%s'", __func__, 577 cp + 2); 578 TAILQ_FOREACH_SAFE(fr, &frs, entry, fr1) 579 format_free_range(&frs, fr); 580 goto out; 581 } 582 tmp = xstrndup(cp + 2, end - (cp + 2)); 583 if (style_parse(&sy, base, tmp) != 0) { 584 log_debug("%s: invalid style '%s'", __func__, tmp); 585 free(tmp); 586 cp = end + 1; 587 continue; 588 } 589 log_debug("%s: style '%s' -> '%s'", __func__, tmp, 590 style_tostring(&sy)); 591 free(tmp); 592 593 /* Check the list state. */ 594 switch (sy.list) { 595 case STYLE_LIST_ON: 596 /* 597 * Entering the list, exiting a marker, or exiting the 598 * focus. 599 */ 600 if (list_state != 0) { 601 if (fr != NULL) { /* abort any region */ 602 free(fr); 603 fr = NULL; 604 } 605 list_state = 0; 606 list_align = sy.align; 607 } 608 609 /* End the focus if started. */ 610 if (focus_start != -1 && focus_end == -1) 611 focus_end = s[LIST].cx; 612 613 current = LIST; 614 break; 615 case STYLE_LIST_FOCUS: 616 /* Entering the focus. */ 617 if (list_state != 0) /* not inside the list */ 618 break; 619 if (focus_start == -1) /* focus already started */ 620 focus_start = s[LIST].cx; 621 break; 622 case STYLE_LIST_OFF: 623 /* Exiting or outside the list. */ 624 if (list_state == 0) { 625 if (fr != NULL) { /* abort any region */ 626 free(fr); 627 fr = NULL; 628 } 629 if (focus_start != -1 && focus_end == -1) 630 focus_end = s[LIST].cx; 631 632 map[list_align] = AFTER; 633 if (list_align == STYLE_ALIGN_LEFT) 634 map[STYLE_ALIGN_DEFAULT] = AFTER; 635 list_state = 1; 636 } 637 current = map[sy.align]; 638 break; 639 case STYLE_LIST_LEFT_MARKER: 640 /* Entering left marker. */ 641 if (list_state != 0) /* not inside the list */ 642 break; 643 if (s[LIST_LEFT].cx != 0) /* already have marker */ 644 break; 645 if (fr != NULL) { /* abort any region */ 646 free(fr); 647 fr = NULL; 648 } 649 if (focus_start != -1 && focus_end == -1) 650 focus_start = focus_end = -1; 651 current = LIST_LEFT; 652 break; 653 case STYLE_LIST_RIGHT_MARKER: 654 /* Entering right marker. */ 655 if (list_state != 0) /* not inside the list */ 656 break; 657 if (s[LIST_RIGHT].cx != 0) /* already have marker */ 658 break; 659 if (fr != NULL) { /* abort any region */ 660 free(fr); 661 fr = NULL; 662 } 663 if (focus_start != -1 && focus_end == -1) 664 focus_start = focus_end = -1; 665 current = LIST_RIGHT; 666 break; 667 } 668 if (current != last) { 669 log_debug("%s: change %s -> %s", __func__, 670 names[last], names[current]); 671 last = current; 672 } 673 674 /* 675 * Check if the range style has changed and if so end the 676 * current range and start a new one if needed. 677 */ 678 if (srs != NULL) { 679 if (fr != NULL && !format_is_type(fr, &sy)) { 680 if (s[current].cx != fr->start) { 681 fr->end = s[current].cx + 1; 682 TAILQ_INSERT_TAIL(&frs, fr, entry); 683 } else 684 free(fr); 685 fr = NULL; 686 } 687 if (fr == NULL && sy.range_type != STYLE_RANGE_NONE) { 688 fr = xcalloc(1, sizeof *fr); 689 fr->index = current; 690 691 fr->s = &s[current]; 692 fr->start = s[current].cx; 693 694 fr->type = sy.range_type; 695 fr->argument = sy.range_argument; 696 } 697 } 698 699 cp = end + 1; 700 } 701 free(fr); 702 703 for (i = 0; i < TOTAL; i++) { 704 screen_write_stop(&ctx[i]); 705 log_debug("%s: width %s is %u", __func__, names[i], width[i]); 706 } 707 if (focus_start != -1 && focus_end != -1) 708 log_debug("%s: focus %d-%d", __func__, focus_start, focus_end); 709 TAILQ_FOREACH(fr, &frs, entry) { 710 log_debug("%s: range %d|%u is %s %u-%u", __func__, fr->type, 711 fr->argument, names[fr->index], fr->start, fr->end); 712 } 713 714 /* 715 * Draw the screens. How they are arranged depends on where the list 716 * appearsq. 717 */ 718 switch (list_align) { 719 case STYLE_ALIGN_DEFAULT: 720 /* No list. */ 721 format_draw_none(octx, available, ocx, ocy, &s[LEFT], 722 &s[CENTRE], &s[RIGHT], &frs); 723 break; 724 case STYLE_ALIGN_LEFT: 725 /* List is part of the left. */ 726 format_draw_left(octx, available, ocx, ocy, &s[LEFT], 727 &s[CENTRE], &s[RIGHT], &s[LIST], &s[LIST_LEFT], 728 &s[LIST_RIGHT], &s[AFTER], focus_start, focus_end, &frs); 729 break; 730 case STYLE_ALIGN_CENTRE: 731 /* List is part of the centre. */ 732 format_draw_centre(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_RIGHT: 737 /* List is part of the right. */ 738 format_draw_right(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 } 743 744 /* Create ranges to return. */ 745 TAILQ_FOREACH_SAFE(fr, &frs, entry, fr1) { 746 sr = xcalloc(1, sizeof *sr); 747 sr->type = fr->type; 748 sr->argument = fr->argument; 749 sr->start = fr->start; 750 sr->end = fr->end; 751 TAILQ_INSERT_TAIL(srs, sr, entry); 752 753 log_debug("%s: range %d|%u at %u-%u", __func__, sr->type, 754 sr->argument, sr->start, sr->end); 755 756 format_free_range(&frs, fr); 757 } 758 759 out: 760 /* Free the screens. */ 761 for (i = 0; i < TOTAL; i++) 762 screen_free(&s[i]); 763 764 /* Restore the original cursor position. */ 765 screen_write_cursormove(octx, ocx, ocy, 0); 766 } 767 768 /* Get width, taking #[] into account. */ 769 u_int 770 format_width(const char *expanded) 771 { 772 const char *cp, *end; 773 u_int width = 0; 774 struct utf8_data ud; 775 enum utf8_state more; 776 777 cp = expanded; 778 while (*cp != '\0') { 779 if (cp[0] == '#' && cp[1] == '[') { 780 end = format_skip(cp + 2, "]"); 781 if (end == NULL) 782 return 0; 783 cp = end + 1; 784 } else if ((more = utf8_open(&ud, *cp)) == UTF8_MORE) { 785 while (*++cp != '\0' && more == UTF8_MORE) 786 more = utf8_append(&ud, *cp); 787 if (more == UTF8_DONE) 788 width += ud.width; 789 else 790 cp -= ud.have; 791 } else if (*cp > 0x1f && *cp < 0x7f) { 792 width++; 793 cp++; 794 } 795 } 796 return (width); 797 } 798 799 /* Trim on the left, taking #[] into account. */ 800 char * 801 format_trim_left(const char *expanded, u_int limit) 802 { 803 char *copy, *out; 804 const char *cp = expanded, *end; 805 u_int width = 0; 806 struct utf8_data ud; 807 enum utf8_state more; 808 809 out = copy = xmalloc(strlen(expanded) + 1); 810 while (*cp != '\0') { 811 if (cp[0] == '#' && cp[1] == '[') { 812 end = format_skip(cp + 2, "]"); 813 if (end == NULL) 814 break; 815 memcpy(out, cp, end + 1 - cp); 816 out += (end + 1 - cp); 817 cp = end + 1; 818 } else if ((more = utf8_open(&ud, *cp)) == UTF8_MORE) { 819 while (*++cp != '\0' && more == UTF8_MORE) 820 more = utf8_append(&ud, *cp); 821 if (more == UTF8_DONE) { 822 if (width + ud.width <= limit) { 823 memcpy(out, ud.data, ud.size); 824 out += ud.size; 825 } 826 width += ud.width; 827 } else 828 cp -= ud.have; 829 } else if (*cp > 0x1f && *cp < 0x7f) { 830 if (width + 1 <= limit) 831 *out++ = *cp; 832 width++; 833 cp++; 834 } else 835 cp++; 836 } 837 *out = '\0'; 838 return (copy); 839 } 840 841 /* Trim on the right, taking #[] into account. */ 842 char * 843 format_trim_right(const char *expanded, u_int limit) 844 { 845 char *copy, *out; 846 const char *cp = expanded, *end; 847 u_int width = 0, total_width, skip; 848 struct utf8_data ud; 849 enum utf8_state more; 850 851 total_width = format_width(expanded); 852 if (total_width <= limit) 853 return (xstrdup(expanded)); 854 skip = total_width - limit; 855 856 out = copy = xmalloc(strlen(expanded) + 1); 857 while (*cp != '\0') { 858 if (cp[0] == '#' && cp[1] == '[') { 859 end = format_skip(cp + 2, "]"); 860 if (end == NULL) 861 break; 862 memcpy(out, cp, end + 1 - cp); 863 out += (end + 1 - cp); 864 cp = end + 1; 865 } else if ((more = utf8_open(&ud, *cp)) == UTF8_MORE) { 866 while (*++cp != '\0' && more == UTF8_MORE) 867 more = utf8_append(&ud, *cp); 868 if (more == UTF8_DONE) { 869 if (width >= skip) { 870 memcpy(out, ud.data, ud.size); 871 out += ud.size; 872 } 873 width += ud.width; 874 } else 875 cp -= ud.have; 876 } else if (*cp > 0x1f && *cp < 0x7f) { 877 if (width >= skip) 878 *out++ = *cp; 879 width++; 880 cp++; 881 } else 882 cp++; 883 } 884 *out = '\0'; 885 return (copy); 886 } 887