teken.c (11d38a5764295585a2472d5e861fa8abe1a11eb2) teken.c (2610c9f2b2449c968304f48bf73d1eef2f4be558)
1/*-
2 * Copyright (c) 2008-2009 Ed Schouten <ed@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

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447 /* Also count the last argument. */
448 t->t_curnum++;
449 }
450 }
451
452 return (0);
453}
454
1/*-
2 * Copyright (c) 2008-2009 Ed Schouten <ed@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright

--- 438 unchanged lines hidden (view full) ---

447 /* Also count the last argument. */
448 t->t_curnum++;
449 }
450 }
451
452 return (0);
453}
454
455#define k TC_BLACK
456#define b TC_BLUE
457#define y TC_BROWN
458#define c TC_CYAN
459#define g TC_GREEN
460#define m TC_MAGENTA
461#define r TC_RED
462#define w TC_WHITE
463#define K (TC_BLACK | TC_LIGHT)
464#define B (TC_BLUE | TC_LIGHT)
465#define Y (TC_BROWN | TC_LIGHT)
466#define C (TC_CYAN | TC_LIGHT)
467#define G (TC_GREEN | TC_LIGHT)
468#define M (TC_MAGENTA | TC_LIGHT)
469#define R (TC_RED | TC_LIGHT)
470#define W (TC_WHITE | TC_LIGHT)
471
472/**
473 * The xterm-256 color map has steps of 0x28 (in the range 0-0xff), except
474 * for the first step which is 0x5f. Scale to the range 0-6 by dividing
475 * by 0x28 and rounding down. The range of 0-5 cannot represent the
476 * larger first step.
477 *
478 * This table is generated by the follow rules:
479 * - if all components are equal, the result is black for (0, 0, 0) and
480 * (2, 2, 2), else white; otherwise:
481 * - subtract the smallest component from all components
482 * - if this gives only one nonzero component, then that is the color
483 * - else if one component is 2 or more larger than the other nonzero one,
484 * then that component gives the color
485 * - else there are 2 nonzero components. The color is that of a small
486 * equal mixture of these components (cyan, yellow or magenta). E.g.,
487 * (0, 5, 6) (Turquoise2) is a much purer cyan than (0, 2, 3)
488 * (DeepSkyBlue4), but we map both to cyan since we can't represent
489 * delicate shades of either blue or cyan and blue would be worse.
490 * Here it is important that components of 1 never occur. Blue would
491 * be twice as large as green in (0, 1, 2).
492 */
493static const teken_color_t teken_256to8tab[] = {
494 /* xterm-16+ 8 dark colors: */
495 0, r, g, y, b, m, c, w,
496
497 /* xterm-16+ 8 light colors: */
498 0, R, G, Y, B, M, C, W,
499
500 /* Red0 submap. */
501 k, b, b, b, b, b,
502 g, c, c, b, b, b,
503 g, c, c, c, b, b,
504 g, g, c, c, c, b,
505 g, g, g, c, c, c,
506 g, g, g, g, c, c,
507
508 /* Red2 submap. */
509 r, m, m, b, b, b,
510 y, k, b, b, b, b,
511 y, g, c, c, b, b,
512 g, g, c, c, c, b,
513 g, g, g, c, c, c,
514 g, g, g, g, c, c,
515
516 /* Red3 submap. */
517 r, m, m, m, b, b,
518 y, r, m, m, b, b,
519 y, y, w, b, b, b,
520 y, y, g, c, c, b,
521 g, g, g, c, c, c,
522 g, g, g, g, c, c,
523
524 /* Red4 submap. */
525 r, r, m, m, m, b,
526 r, r, m, m, m, b,
527 y, y, r, m, m, b,
528 y, y, y, w, b, b,
529 y, y, y, g, c, c,
530 g, g, g, g, c, c,
531
532 /* Red5 submap. */
533 r, r, r, m, m, m,
534 r, r, r, m, m, m,
535 r, r, r, m, m, m,
536 y, y, y, r, m, m,
537 y, y, y, y, w, b,
538 y, y, y, y, g, c,
539
540 /* Red6 submap. */
541 r, r, r, r, m, m,
542 r, r, r, r, m, m,
543 r, r, r, r, m, m,
544 r, r, r, r, m, m,
545 y, y, y, y, r, m,
546 y, y, y, y, y, w,
547
548 /* Grey submap. */
549 k, k, k, k, k, k,
550 k, k, k, k, k, k,
551 w, w, w, w, w, w,
552 w, w, w, w, w, w,
553};
554
555/*
556 * This table is generated from the previous one by setting TC_LIGHT for
557 * entries whose luminosity in the xterm256 color map is 60% or larger.
558 * Thus the previous table is currently not really needed. It will be
559 * used for different fine tuning of the tables.
560 */
561static const teken_color_t teken_256to16tab[] = {
562 /* xterm-16+ 8 dark colors: */
563 0, r, g, y, b, m, c, w,
564
565 /* xterm-16+ 8 light colors: */
566 0, R, G, Y, B, M, C, W,
567
568 /* Red0 submap. */
569 k, b, b, b, b, b,
570 g, c, c, b, b, b,
571 g, c, c, c, b, b,
572 g, g, c, c, c, b,
573 g, g, g, c, c, c,
574 g, g, g, g, c, c,
575
576 /* Red2 submap. */
577 r, m, m, b, b, b,
578 y, K, b, b, B, B,
579 y, g, c, c, B, B,
580 g, g, c, c, C, B,
581 g, G, G, C, C, C,
582 g, G, G, G, C, C,
583
584 /* Red3 submap. */
585 r, m, m, m, b, b,
586 y, r, m, m, B, B,
587 y, y, w, B, B, B,
588 y, y, G, C, C, B,
589 g, G, G, C, C, C,
590 g, G, G, G, C, C,
591
592 /* Red4 submap. */
593 r, r, m, m, m, b,
594 r, r, m, m, M, B,
595 y, y, R, M, M, B,
596 y, y, Y, W, B, B,
597 y, Y, Y, G, C, C,
598 g, G, G, G, C, C,
599
600 /* Red5 submap. */
601 r, r, r, m, m, m,
602 r, R, R, M, M, M,
603 r, R, R, M, M, M,
604 y, Y, Y, R, M, M,
605 y, Y, Y, Y, W, B,
606 y, Y, Y, Y, G, C,
607
608 /* Red6 submap. */
609 r, r, r, r, m, m,
610 r, R, R, R, M, M,
611 r, R, R, R, M, M,
612 r, R, R, R, M, M,
613 y, Y, Y, Y, R, M,
614 y, Y, Y, Y, Y, W,
615
616 /* Grey submap. */
617 k, k, k, k, k, k,
618 K, K, K, K, K, K,
619 w, w, w, w, w, w,
620 W, W, W, W, W, W,
621};
622
623#undef k
624#undef b
625#undef y
626#undef c
627#undef g
628#undef m
629#undef r
630#undef w
631#undef K
632#undef B
633#undef Y
634#undef C
635#undef G
636#undef M
637#undef R
638#undef W
639
455teken_color_t
456teken_256to8(teken_color_t c)
457{
640teken_color_t
641teken_256to8(teken_color_t c)
642{
458 unsigned int r, g, b;
459
643
460 if (c < 16) {
461 /* Traditional color indices. */
462 return (c % 8);
463 } else if (c >= 244) {
464 /* Upper grayscale colors. */
465 return (TC_WHITE);
466 } else if (c >= 232) {
467 /* Lower grayscale colors. */
468 return (TC_BLACK);
469 }
644 return (teken_256to8tab[c % 256]);
645}
470
646
471 /* Convert to RGB. */
472 c -= 16;
473 b = c % 6;
474 g = (c / 6) % 6;
475 r = c / 36;
647teken_color_t
648teken_256to16(teken_color_t c)
649{
476
650
477 if (r < g) {
478 /* Possibly green. */
479 if (g < b)
480 return (TC_BLUE);
481 else if (g > b)
482 return (TC_GREEN);
483 else
484 return (TC_CYAN);
485 } else if (r > g) {
486 /* Possibly red. */
487 if (r < b)
488 return (TC_BLUE);
489 else if (r > b)
490 return (TC_RED);
491 else
492 return (TC_MAGENTA);
493 } else {
494 /* Possibly brown. */
495 if (g < b)
496 return (TC_BLUE);
497 else if (g > b)
498 return (TC_BROWN);
499 else if (r < 3)
500 return (TC_BLACK);
501 else
502 return (TC_WHITE);
503 }
651 return (teken_256to16tab[c % 256]);
504}
505
506static const char * const special_strings_cons25[] = {
507 [TKEY_UP] = "\x1B[A", [TKEY_DOWN] = "\x1B[B",
508 [TKEY_LEFT] = "\x1B[D", [TKEY_RIGHT] = "\x1B[C",
509
510 [TKEY_HOME] = "\x1B[H", [TKEY_END] = "\x1B[F",
511 [TKEY_INSERT] = "\x1B[L", [TKEY_DELETE] = "\x7F",

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653
654static const char * const special_strings_cons25[] = {
655 [TKEY_UP] = "\x1B[A", [TKEY_DOWN] = "\x1B[B",
656 [TKEY_LEFT] = "\x1B[D", [TKEY_RIGHT] = "\x1B[C",
657
658 [TKEY_HOME] = "\x1B[H", [TKEY_END] = "\x1B[F",
659 [TKEY_INSERT] = "\x1B[L", [TKEY_DELETE] = "\x7F",

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