colour.c

   1 /* $Id: colour.c,v 1.7 2009-09-11 14:13:52 tcunha Exp $ */
   2
   3 /*
   4  * Copyright (c) 2008 Nicholas Marriott <nicm@users.sourceforge.net>
   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 /*
  27  * Colour to string conversion functions. Bit 8 of the colour means it is one
  28  * of the 256 colour palette.
  29  */
  30
  31 void
  32 colour_set_fg(struct grid_cell *gc, int c)
  33 {
  34         if (c & 0x100)
  35                 gc->flags |= GRID_FLAG_FG256;
  36         gc->fg = c;
  37 }
  38
  39 void
  40 colour_set_bg(struct grid_cell *gc, int c)
  41 {
  42         if (c & 0x100)
  43                 gc->flags |= GRID_FLAG_BG256;
  44         gc->bg = c;
  45 }
  46
  47 const char *
  48 colour_tostring(int c)
  49 {
  50         static char     s[32];
  51
  52         if (c & 0x100) {
  53                 xsnprintf(s, sizeof s, "colour%u", c & ~0x100);
  54                 return (s);
  55         }
  56
  57         switch (c) {
  58         case 0:
  59                 return ("black");
  60         case 1:
  61                 return ("red");
  62         case 2:
  63                 return ("green");
  64         case 3:
  65                 return ("yellow");
  66         case 4:
  67                 return ("blue");
  68         case 5:
  69                 return ("magenta");
  70         case 6:
  71                 return ("cyan");
  72         case 7:
  73                 return ("white");
  74         case 8:
  75                 return ("default");
  76         }
  77         return (NULL);
  78 }
  79
  80 int
  81 colour_fromstring(const char *s)
  82 {
  83         const char      *errstr;
  84         int              n;
  85
  86         if (strncasecmp(s, "colour", (sizeof "colour") - 1) == 0) {
  87                 n = strtonum(s + (sizeof "colour") - 1, 0, 255, &errstr);
  88                 if (errstr != NULL)
  89                         return (-1);
  90                 return (n | 0x100);
  91         }
  92
  93         if (strcasecmp(s, "black") == 0 || (s[0] == '0' && s[1] == '\0'))
  94                 return (0);
  95         if (strcasecmp(s, "red") == 0 || (s[0] == '1' && s[1] == '\0'))
  96                 return (1);
  97         if (strcasecmp(s, "green") == 0 || (s[0] == '2' && s[1] == '\0'))
  98                 return (2);
  99         if (strcasecmp(s, "yellow") == 0 || (s[0] == '3' && s[1] == '\0'))
 100                 return (3);
 101         if (strcasecmp(s, "blue") == 0 || (s[0] == '4' && s[1] == '\0'))
 102                 return (4);
 103         if (strcasecmp(s, "magenta") == 0 || (s[0] == '5' && s[1] == '\0'))
 104                 return (5);
 105         if (strcasecmp(s, "cyan") == 0 || (s[0] == '6' && s[1] == '\0'))
 106                 return (6);
 107         if (strcasecmp(s, "white") == 0 || (s[0] == '7' && s[1] == '\0'))
 108                 return (7);
 109         if (strcasecmp(s, "default") == 0 || (s[0] == '8' && s[1] == '\0'))
 110                 return (8);
 111         return (-1);
 112 }
 113
 114 u_char
 115 colour_256to16(u_char c)
 116 {
 117         static const u_char table[256] = {
 118                  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15,
 119                  0,  4,  4,  4, 12, 12,  2,  6,  4,  4, 12, 12,  2,  2,  6,  4,
 120                 12, 12,  2,  2,  2,  6, 12, 12, 10, 10, 10, 10, 14, 12, 10, 10,
 121                 10, 10, 10, 14,  1,  5,  4,  4, 12, 12,  3,  8,  4,  4, 12, 12,
 122                  2,  2,  6,  4, 12, 12,  2,  2,  2,  6, 12, 12, 10, 10, 10, 10,
 123                 14, 12, 10, 10, 10, 10, 10, 14,  1,  1,  5,  4, 12, 12,  1,  1,
 124                  5,  4, 12, 12,  3,  3,  8,  4, 12, 12,  2,  2,  2,  6, 12, 12,
 125                 10, 10, 10, 10, 14, 12, 10, 10, 10, 10, 10, 14,  1,  1,  1,  5,
 126                 12, 12,  1,  1,  1,  5, 12, 12,  1,  1,  1,  5, 12, 12,  3,  3,
 127                  3,  7, 12, 12, 10, 10, 10, 10, 14, 12, 10, 10, 10, 10, 10, 14,
 128                  9,  9,  9,  9, 13, 12,  9,  9,  9,  9, 13, 12,  9,  9,  9,  9,
 129                 13, 12,  9,  9,  9,  9, 13, 12, 11, 11, 11, 11,  7, 12, 10, 10,
 130                 10, 10, 10, 14,  9,  9,  9,  9,  9, 13,  9,  9,  9,  9,  9, 13,
 131                  9,  9,  9,  9,  9, 13,  9,  9,  9,  9,  9, 13,  9,  9,  9,  9,
 132                  9, 13, 11, 11, 11, 11, 11, 15,  0,  0,  0,  0,  0,  0,  8,  8,
 133                  8,  8,  8,  8,  7,  7,  7,  7,  7,  7, 15, 15, 15, 15, 15, 15
 134         };
 135
 136         return (table[c]);
 137 }
 138
 139 u_char
 140 colour_256to88(u_char c)
 141 {
 142         static const u_char table[256] = {
 143                  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15,
 144                 16, 17, 17, 18, 18, 19, 20, 21, 21, 22, 22, 23, 20, 21, 21, 22,
 145                 22, 23, 24, 25, 25, 26, 26, 27, 24, 25, 25, 26, 26, 27, 28, 29,
 146                 29, 30, 30, 31, 32, 33, 33, 34, 34, 35, 36, 37, 37, 38, 38, 39,
 147                 36, 37, 37, 38, 38, 39, 40, 41, 41, 42, 42, 43, 40, 41, 41, 42,
 148                 42, 43, 44, 45, 45, 46, 46, 47, 32, 33, 33, 34, 34, 35, 36, 37,
 149                 37, 38, 38, 39, 36, 37, 37, 38, 38, 39, 40, 41, 41, 42, 42, 43,
 150                 40, 41, 41, 42, 42, 43, 44, 45, 45, 46, 46, 47, 48, 49, 49, 50,
 151                 50, 51, 52, 53, 53, 54, 54, 55, 52, 53, 53, 54, 54, 55, 56, 57,
 152                 57, 58, 58, 59, 56, 57, 57, 58, 58, 59, 60, 61, 61, 62, 62, 63,
 153                 48, 49, 49, 50, 50, 51, 52, 53, 53, 54, 54, 55, 52, 53, 53, 54,
 154                 54, 55, 56, 57, 57, 58, 58, 59, 56, 57, 57, 58, 58, 59, 60, 61,
 155                 61, 62, 62, 63, 64, 65, 65, 66, 66, 67, 68, 69, 69, 70, 70, 71,
 156                 68, 69, 69, 70, 70, 71, 72, 73, 73, 74, 74, 75, 72, 73, 73, 74,
 157                 74, 75, 76, 77, 77, 78, 78, 79,  0,  0, 80, 80, 80, 81, 81, 81,
 158                 82, 82, 82, 83, 83, 83, 84, 84, 84, 85, 85, 85, 86, 86, 86, 87
 159         };
 160
 161         return (table[c]);
 162 }