lib/tty/color.c

   1 /* Color setup.
   2    Interface functions.
   3
   4    Copyright (C) 1994, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
   5    2007, 2008, 2009 Free Software Foundation, Inc.
   6
   7    Written by:
   8    Andrew Borodin <aborodin@vmail.ru>, 2009.
   9    Slava Zanko <slavazanko@gmail.com>, 2009.
  10
  11    This program is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 2 of the License, or
  14    (at your option) any later version.
  15
  16    This program is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19    GNU General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program; if not, write to the Free Software
  23    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  24
  25 /** \file color.c
  26  *  \brief Source: color setup
  27  */
  28
  29 #include <config.h>
  30
  31 #include <stdio.h>
  32 #include <stdlib.h>
  33 #include <string.h>
  34 #include <sys/types.h>          /* size_t */
  35
  36 #include "lib/global.h"
  37
  38 #include "tty.h"
  39 #include "color.h"
  40
  41 #include "color-internal.h"
  42
  43 /*** global variables ****************************************************************************/
  44
  45 char *command_line_colors = NULL;
  46
  47 static char *tty_color_defaults__fg = NULL;
  48 static char *tty_color_defaults__bg = NULL;
  49
  50 /* Set if we are actually using colors */
  51 gboolean use_colors = FALSE;
  52
  53 /*** file scope macro definitions ****************************************************************/
  54
  55 /*** file scope type declarations ****************************************************************/
  56
  57 /*** file scope variables ************************************************************************/
  58
  59 static GHashTable *mc_tty_color__hashtable = NULL;
  60
  61 /*** file scope functions ************************************************************************/
  62 /* --------------------------------------------------------------------------------------------- */
  63
  64 static gboolean
  65 tty_color_free_condition_cb (gpointer key, gpointer value, gpointer user_data)
  66 {
  67     gboolean is_temp_color;
  68     tty_color_pair_t *mc_color_pair;
  69     (void) key;
  70
  71     is_temp_color = user_data != NULL;
  72     mc_color_pair = (tty_color_pair_t *) value;
  73     return (mc_color_pair->is_temp == is_temp_color);
  74 }
  75
  76 /* --------------------------------------------------------------------------------------------- */
  77
  78 static void
  79 tty_color_free_all (gboolean is_temp_color)
  80 {
  81     g_hash_table_foreach_remove (mc_tty_color__hashtable, tty_color_free_condition_cb,
  82                                  is_temp_color ? GINT_TO_POINTER (1) : NULL);
  83 }
  84
  85 /* --------------------------------------------------------------------------------------------- */
  86
  87 static gboolean
  88 tty_color_get_next_cpn_cb (gpointer key, gpointer value, gpointer user_data)
  89 {
  90     int cp;
  91     tty_color_pair_t *mc_color_pair;
  92     (void) key;
  93
  94     cp = GPOINTER_TO_INT (user_data);
  95     mc_color_pair = (tty_color_pair_t *) value;
  96
  97     return (cp == mc_color_pair->pair_index);
  98 }
  99
 100 /* --------------------------------------------------------------------------------------------- */
 101
 102 static int
 103 tty_color_get_next__color_pair_number (void)
 104 {
 105     const size_t cp_count = g_hash_table_size (mc_tty_color__hashtable);
 106     size_t cp;
 107
 108     for (cp = 0; cp < cp_count; cp++)
 109         if (g_hash_table_find (mc_tty_color__hashtable, tty_color_get_next_cpn_cb,
 110                                GINT_TO_POINTER (cp)) == NULL)
 111             break;
 112
 113     return cp;
 114 }
 115
 116 /* --------------------------------------------------------------------------------------------- */
 117 /*** public functions ****************************************************************************/
 118 /* --------------------------------------------------------------------------------------------- */
 119
 120 void
 121 tty_init_colors (gboolean disable, gboolean force)
 122 {
 123     tty_color_init_lib (disable, force);
 124     mc_tty_color__hashtable = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_free);
 125 }
 126
 127 /* --------------------------------------------------------------------------------------------- */
 128
 129 void
 130 tty_colors_done (void)
 131 {
 132     tty_color_deinit_lib ();
 133     g_free (tty_color_defaults__fg);
 134     g_free (tty_color_defaults__bg);
 135
 136     g_hash_table_destroy (mc_tty_color__hashtable);
 137 }
 138
 139 /* --------------------------------------------------------------------------------------------- */
 140
 141 gboolean
 142 tty_use_colors (void)
 143 {
 144     return use_colors;
 145 }
 146
 147 /* --------------------------------------------------------------------------------------------- */
 148
 149 int
 150 tty_try_alloc_color_pair2 (const char *fg, const char *bg, gboolean is_temp_color)
 151 {
 152     gchar *color_pair;
 153     tty_color_pair_t *mc_color_pair;
 154     const char *c_fg, *c_bg;
 155
 156     if (fg == NULL)
 157         fg = tty_color_defaults__fg;
 158     if (bg == NULL)
 159         bg = tty_color_defaults__bg;
 160
 161     c_fg = tty_color_get_valid_name (fg);
 162     c_bg = tty_color_get_valid_name (bg);
 163
 164     color_pair = g_strdup_printf ("%s.%s", c_fg, c_bg);
 165     if (color_pair == NULL)
 166         return 0;
 167
 168     mc_color_pair =
 169         (tty_color_pair_t *) g_hash_table_lookup (mc_tty_color__hashtable, (gpointer) color_pair);
 170
 171     if (mc_color_pair != NULL)
 172     {
 173         g_free (color_pair);
 174         return mc_color_pair->pair_index;
 175     }
 176
 177     mc_color_pair = g_try_new0 (tty_color_pair_t, 1);
 178     if (mc_color_pair == NULL)
 179     {
 180         g_free (color_pair);
 181         return 0;
 182     }
 183
 184     mc_color_pair->is_temp = is_temp_color;
 185     mc_color_pair->cfg = c_fg;
 186     mc_color_pair->cbg = c_bg;
 187     mc_color_pair->ifg = tty_color_get_index_by_name (c_fg);
 188     mc_color_pair->ibg = tty_color_get_index_by_name (c_bg);
 189     mc_color_pair->pair_index = tty_color_get_next__color_pair_number ();
 190
 191     tty_color_try_alloc_pair_lib (mc_color_pair);
 192
 193     g_hash_table_insert (mc_tty_color__hashtable, (gpointer) color_pair, (gpointer) mc_color_pair);
 194
 195     return mc_color_pair->pair_index;
 196 }
 197
 198 /* --------------------------------------------------------------------------------------------- */
 199
 200 int
 201 tty_try_alloc_color_pair (const char *fg, const char *bg)
 202 {
 203     return tty_try_alloc_color_pair2 (fg, bg, TRUE);
 204 }
 205
 206 /* --------------------------------------------------------------------------------------------- */
 207
 208 void
 209 tty_color_free_all_tmp (void)
 210 {
 211     tty_color_free_all (TRUE);
 212 }
 213
 214 /* --------------------------------------------------------------------------------------------- */
 215
 216 void
 217 tty_color_free_all_non_tmp (void)
 218 {
 219     tty_color_free_all (FALSE);
 220 }
 221
 222 /* --------------------------------------------------------------------------------------------- */
 223
 224 void
 225 tty_color_set_defaults (const char *fgcolor, const char *bgcolor)
 226 {
 227     g_free (tty_color_defaults__fg);
 228     g_free (tty_color_defaults__fg);
 229
 230     tty_color_defaults__fg = (fgcolor != NULL) ? g_strdup (fgcolor) : NULL;
 231     tty_color_defaults__bg = (bgcolor != NULL) ? g_strdup (bgcolor) : NULL;
 232 }
 233
 234 /* --------------------------------------------------------------------------------------------- */