lib/tty/color-ncurses.c

   1 /* Color setup for NCurses screen library
   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>, 2010
   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-ncurses.c
  25  *  \brief Source: NCUrses-specific color setup
  26  */
  27
  28 #include <config.h>
  29
  30 #include <stdio.h>
  31 #include <stdlib.h>
  32 #include <string.h>
  33 #include <sys/types.h>          /* size_t */
  34
  35 #include "lib/global.h"
  36
  37 #include "tty-ncurses.h"
  38 #include "color.h"              /* variables */
  39 #include "color-internal.h"
  40
  41 /*** global variables ****************************************************************************/
  42
  43 /*** file scope macro definitions ****************************************************************/
  44
  45 /*** file scope type declarations ****************************************************************/
  46
  47 /*** file scope variables ************************************************************************/
  48
  49 static GHashTable *mc_tty_color_color_pair_attrs = NULL;
  50
  51 /*** file scope functions ************************************************************************/
  52 /* --------------------------------------------------------------------------------------------- */
  53
  54 static inline void
  55 mc_tty_color_attr_destroy_cb (gpointer data)
  56 {
  57     g_free (data);
  58 }
  59
  60 /* --------------------------------------------------------------------------------------------- */
  61
  62 static void
  63 mc_tty_color_save_attr (int color_pair, int color_attr)
  64 {
  65     int *attr, *key;
  66
  67     attr = g_try_new0 (int, 1);
  68     if (attr == NULL)
  69         return;
  70
  71     key = g_try_new (int, 1);
  72     if (key == NULL)
  73     {
  74         g_free (attr);
  75         return;
  76     }
  77
  78     *key = color_pair;
  79     *attr = color_attr;
  80
  81     g_hash_table_replace (mc_tty_color_color_pair_attrs, (gpointer) key, (gpointer) attr);
  82 }
  83
  84 /* --------------------------------------------------------------------------------------------- */
  85
  86 static int
  87 color_get_attr (int color_pair)
  88 {
  89     int *fnd = NULL;
  90
  91     if (mc_tty_color_color_pair_attrs != NULL)
  92         fnd = (int *) g_hash_table_lookup (mc_tty_color_color_pair_attrs, (gpointer) & color_pair);
  93     return (fnd != NULL) ? *fnd : 0;
  94 }
  95
  96 /* --------------------------------------------------------------------------------------------- */
  97
  98 static void
  99 mc_tty_color_pair_init_special (tty_color_pair_t * mc_color_pair,
 100                                 int fg1, int bg1, int fg2, int bg2, int attr)
 101 {
 102     if (has_colors () && !mc_tty_color_disable)
 103         init_pair (mc_color_pair->pair_index, fg1, bg1);
 104     else
 105         init_pair (mc_color_pair->pair_index, fg2, bg2);
 106     mc_tty_color_save_attr (mc_color_pair->pair_index, attr);
 107 }
 108
 109 /* --------------------------------------------------------------------------------------------- */
 110 /*** public functions ****************************************************************************/
 111 /* --------------------------------------------------------------------------------------------- */
 112
 113 void
 114 tty_color_init_lib (gboolean disable, gboolean force)
 115 {
 116     (void) force;
 117
 118     if (has_colors () && !disable)
 119     {
 120         use_colors = TRUE;
 121         start_color ();
 122         use_default_colors ();
 123     }
 124
 125     mc_tty_color_color_pair_attrs = g_hash_table_new_full
 126         (g_int_hash, g_int_equal, mc_tty_color_attr_destroy_cb, mc_tty_color_attr_destroy_cb);
 127 }
 128
 129 /* --------------------------------------------------------------------------------------------- */
 130
 131 void
 132 tty_color_deinit_lib (void)
 133 {
 134     g_hash_table_destroy (mc_tty_color_color_pair_attrs);
 135     mc_tty_color_color_pair_attrs = NULL;
 136 }
 137
 138 /* --------------------------------------------------------------------------------------------- */
 139
 140 void
 141 tty_color_try_alloc_pair_lib (tty_color_pair_t * mc_color_pair)
 142 {
 143
 144     if (mc_color_pair->ifg <= (int) SPEC_A_REVERSE)
 145     {
 146         switch (mc_color_pair->ifg)
 147         {
 148         case SPEC_A_REVERSE:
 149             mc_tty_color_pair_init_special (mc_color_pair,
 150                                             COLOR_BLACK, COLOR_WHITE,
 151                                             COLOR_BLACK, COLOR_WHITE | A_BOLD, A_REVERSE);
 152             break;
 153         case SPEC_A_BOLD:
 154             mc_tty_color_pair_init_special (mc_color_pair,
 155                                             COLOR_WHITE, COLOR_BLACK,
 156                                             COLOR_WHITE, COLOR_BLACK, A_BOLD);
 157             break;
 158         case SPEC_A_BOLD_REVERSE:
 159             mc_tty_color_pair_init_special (mc_color_pair,
 160                                             COLOR_WHITE, COLOR_WHITE,
 161                                             COLOR_WHITE, COLOR_WHITE, A_BOLD | A_REVERSE);
 162             break;
 163         case SPEC_A_UNDERLINE:
 164             mc_tty_color_pair_init_special (mc_color_pair,
 165                                             COLOR_WHITE, COLOR_BLACK,
 166                                             COLOR_WHITE, COLOR_BLACK, A_UNDERLINE);
 167             break;
 168         }
 169     }
 170     else
 171     {
 172         int ifg, ibg, attr;
 173
 174         ifg = mc_color_pair->ifg;
 175         ibg = mc_color_pair->ibg;
 176         attr = mc_color_pair->attr;
 177
 178
 179         /* In non-256 color mode, change bright colors into bold */
 180         if (!tty_use_256colors ())
 181         {
 182             if (ifg >= 8 && ifg < 16)
 183             {
 184                 ifg &= 0x07;
 185                 attr |= A_BOLD;
 186             }
 187
 188             if (ibg >= 8 && ibg < 16)
 189             {
 190                 ibg &= 0x07;
 191                 /* attr | = A_BOLD | A_REVERSE ; */
 192             }
 193         }
 194
 195         init_pair (mc_color_pair->pair_index, ifg, ibg);
 196         mc_tty_color_save_attr (mc_color_pair->pair_index, attr);
 197     }
 198 }
 199
 200 /* --------------------------------------------------------------------------------------------- */
 201
 202 void
 203 tty_setcolor (int color)
 204 {
 205     attrset (COLOR_PAIR (color) | color_get_attr (color));
 206 }
 207
 208 /* --------------------------------------------------------------------------------------------- */
 209
 210 void
 211 tty_lowlevel_setcolor (int color)
 212 {
 213     tty_setcolor (color);
 214 }
 215
 216 /* --------------------------------------------------------------------------------------------- */
 217
 218 void
 219 tty_set_normal_attrs (void)
 220 {
 221     standend ();
 222 }
 223
 224 /* --------------------------------------------------------------------------------------------- */
 225
 226 gboolean
 227 tty_use_256colors (void)
 228 {
 229     return (COLORS == 256);
 230 }
 231
 232 /* --------------------------------------------------------------------------------------------- */