lib/tty/color-internal.c

   1 /*  Internal stuff of color setup
   2    Copyright (C) 1994, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
   3    2007, 2008, 2009, 2010 Free Software Foundation, Inc.
   4
   5    Written by:
   6    Andrew Borodin <aborodin@vmail.ru>, 2009
   7    Slava Zanko <slavazanko@gmail.com>, 2009
   8    Egmont Koblinger <egmont@gmail.com>, 2010
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 2 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program; if not, write to the Free Software
  22    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  23
  24 /** \file color-internal.c
  25  *  \brief Source: Internal stuff of color setup
  26  */
  27
  28 #include <config.h>
  29
  30 #include <string.h>             /* strcmp */
  31
  32 #include "color.h"              /* colors and attributes */
  33 #include "color-internal.h"
  34
  35 /*** global variables ****************************************************************************/
  36
  37 gboolean mc_tty_color_disable;
  38
  39 /*** file scope macro definitions ****************************************************************/
  40
  41 /*** file scope type declarations ****************************************************************/
  42
  43 typedef struct mc_tty_color_table_struct
  44 {
  45     const char *name;
  46     int value;
  47 } mc_tty_color_table_t;
  48
  49 /*** file scope variables ************************************************************************/
  50
  51 mc_tty_color_table_t const color_table[] = {
  52     {"black", COLOR_BLACK},
  53     {"gray", COLOR_BLACK + 8},
  54     {"red", COLOR_RED},
  55     {"brightred", COLOR_RED + 8},
  56     {"green", COLOR_GREEN},
  57     {"brightgreen", COLOR_GREEN + 8},
  58     {"brown", COLOR_YELLOW},
  59     {"yellow", COLOR_YELLOW + 8},
  60     {"blue", COLOR_BLUE},
  61     {"brightblue", COLOR_BLUE + 8},
  62     {"magenta", COLOR_MAGENTA},
  63     {"brightmagenta", COLOR_MAGENTA + 8},
  64     {"cyan", COLOR_CYAN},
  65     {"brightcyan", COLOR_CYAN + 8},
  66     {"lightgray", COLOR_WHITE},
  67     {"white", COLOR_WHITE + 8},
  68     {"default", -1},            /* default color of the terminal */
  69     /* special colors */
  70     {"A_REVERSE", SPEC_A_REVERSE},
  71     {"A_BOLD", SPEC_A_BOLD},
  72     {"A_BOLD_REVERSE", SPEC_A_BOLD_REVERSE},
  73     {"A_UNDERLINE", SPEC_A_UNDERLINE},
  74     /* End of list */
  75     {NULL, 0}
  76 };
  77
  78 mc_tty_color_table_t const attributes_table[] = {
  79     {"bold", A_BOLD},
  80     {"underline", A_UNDERLINE},
  81     {"reverse", A_REVERSE},
  82     {"blink", A_BLINK},
  83     /* End of list */
  84     {NULL, 0}
  85 };
  86
  87 /*** file scope functions ************************************************************************/
  88 /* --------------------------------------------------------------------------------------------- */
  89
  90 static int
  91 parse_256_color_name (const char *color_name)
  92 {
  93     int i;
  94     char dummy;
  95     if (sscanf (color_name, "color%d%c", &i, &dummy) == 1 && i >= 0 && i < 256)
  96     {
  97         return i;
  98     }
  99     if (sscanf (color_name, "gray%d%c", &i, &dummy) == 1 && i >= 0 && i < 24)
 100     {
 101         return 232 + i;
 102     }
 103     if (strncmp (color_name, "rgb", 3) == 0 &&
 104         color_name[3] >= '0' && color_name[3] < '6' &&
 105         color_name[4] >= '0' && color_name[4] < '6' &&
 106         color_name[5] >= '0' && color_name[5] < '6' && color_name[6] == '\0')
 107     {
 108         return 16 + 36 * (color_name[3] - '0') + 6 * (color_name[4] - '0') + (color_name[5] - '0');
 109     }
 110     return -1;
 111 }
 112
 113 /* --------------------------------------------------------------------------------------------- */
 114 /*** public functions ****************************************************************************/
 115 /* --------------------------------------------------------------------------------------------- */
 116
 117 const char *
 118 tty_color_get_name_by_index (int idx)
 119 {
 120     static char **color_N_names = NULL;
 121     int i;
 122
 123     /* Find the real English name of the first 16 colors, */
 124     /* as well as the A_* special values. */
 125     for (i = 0; color_table[i].name != NULL; i++)
 126         if (idx == color_table[i].value)
 127             return color_table[i].name;
 128     /* Create and return the strings "color16" to "color255". */
 129     if (idx >= 16 && idx < 256)
 130     {
 131         if (color_N_names == NULL)
 132         {
 133             color_N_names = g_try_malloc0 (240 * sizeof (char *));
 134         }
 135         if (color_N_names[idx - 16] == NULL)
 136         {
 137             color_N_names[idx - 16] = g_try_malloc (9);
 138             sprintf (color_N_names[idx - 16], "color%d", idx);
 139         }
 140         return color_N_names[idx - 16];
 141     }
 142     return "default";
 143 }
 144
 145 /* --------------------------------------------------------------------------------------------- */
 146
 147 int
 148 tty_color_get_index_by_name (const char *color_name)
 149 {
 150
 151     if (color_name != NULL)
 152     {
 153         size_t i;
 154         for (i = 0; color_table[i].name != NULL; i++)
 155             if (strcmp (color_name, color_table[i].name) == 0)
 156                 return color_table[i].value;
 157         return parse_256_color_name (color_name);
 158     }
 159     return -1;
 160 }
 161
 162 /* --------------------------------------------------------------------------------------------- */
 163
 164 int
 165 tty_attr_get_bits (const char *attrs)
 166 {
 167     int attr_bits = 0;
 168     gchar **attr_list;
 169     int i, j;
 170
 171     if (attrs != NULL)
 172     {
 173         attr_list = g_strsplit (attrs, "+", -1);
 174         for (i = 0; attr_list[i] != NULL; i++)
 175         {
 176             for (j = 0; attributes_table[j].name != NULL; j++)
 177             {
 178                 if (strcmp (attr_list[i], attributes_table[j].name) == 0)
 179                 {
 180                     attr_bits |= attributes_table[j].value;
 181                     break;
 182                 }
 183             }
 184         }
 185         g_strfreev (attr_list);
 186     }
 187     return attr_bits;
 188 }
 189
 190 /* --------------------------------------------------------------------------------------------- */