lib/tty/color-ncurses.c

   1 /*
   2    Color setup for NCurses screen library
   3
   4    Copyright (C) 1994, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
   5    2007, 2008, 2009, 2010, 2011
   6    The Free Software Foundation, Inc.
   7
   8    Written by:
   9    Andrew Borodin <aborodin@vmail.ru>, 2009
  10    Slava Zanko <slavazanko@gmail.com>, 2010
  11    Egmont Koblinger <egmont@gmail.com>, 2010
  12
  13    This file is part of the Midnight Commander.
  14
  15    The Midnight Commander is free software: you can redistribute it
  16    and/or modify it under the terms of the GNU General Public License as
  17    published by the Free Software Foundation, either version 3 of the License,
  18    or (at your option) any later version.
  19
  20    The Midnight Commander is distributed in the hope that it will be useful,
  21    but WITHOUT ANY WARRANTY; without even the implied warranty of
  22    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23    GNU General Public License for more details.
  24
  25    You should have received a copy of the GNU General Public License
  26    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  27  */
  28
  29 /** \file color-ncurses.c
  30  *  \brief Source: NCUrses-specific color setup
  31  */
  32
  33 #include <config.h>
  34
  35 #include <stdio.h>
  36 #include <stdlib.h>
  37 #include <string.h>
  38 #include <sys/types.h>          /* size_t */
  39
  40 #include "lib/global.h"
  41
  42 #include "tty-ncurses.h"
  43 #include "color.h"              /* variables */
  44 #include "color-internal.h"
  45
  46 /*** global variables ****************************************************************************/
  47
  48 /*** file scope macro definitions ****************************************************************/
  49
  50 /*** file scope type declarations ****************************************************************/
  51
  52 /*** file scope variables ************************************************************************/
  53
  54 static GHashTable *mc_tty_color_color_pair_attrs = NULL;
  55
  56 /*** file scope functions ************************************************************************/
  57 /* --------------------------------------------------------------------------------------------- */
  58
  59 static inline void
  60 mc_tty_color_attr_destroy_cb (gpointer data)
  61 {
  62     g_free (data);
  63 }
  64
  65 /* --------------------------------------------------------------------------------------------- */
  66
  67 static void
  68 mc_tty_color_save_attr (int color_pair, int color_attr)
  69 {
  70     int *attr, *key;
  71
  72     attr = g_try_new0 (int, 1);
  73     if (attr == NULL)
  74         return;
  75
  76     key = g_try_new (int, 1);
  77     if (key == NULL)
  78     {
  79         g_free (attr);
  80         return;
  81     }
  82
  83     *key = color_pair;
  84     *attr = color_attr;
  85
  86     g_hash_table_replace (mc_tty_color_color_pair_attrs, (gpointer) key, (gpointer) attr);
  87 }
  88
  89 /* --------------------------------------------------------------------------------------------- */
  90
  91 static int
  92 color_get_attr (int color_pair)
  93 {
  94     int *fnd = NULL;
  95
  96     if (mc_tty_color_color_pair_attrs != NULL)
  97         fnd = (int *) g_hash_table_lookup (mc_tty_color_color_pair_attrs, (gpointer) & color_pair);
  98     return (fnd != NULL) ? *fnd : 0;
  99 }
 100
 101 /* --------------------------------------------------------------------------------------------- */
 102
 103 static void
 104 mc_tty_color_pair_init_special (tty_color_pair_t * mc_color_pair,
 105                                 int fg1, int bg1, int fg2, int bg2, int attr)
 106 {
 107     if (has_colors () && !mc_tty_color_disable)
 108         init_pair (mc_color_pair->pair_index, fg1, bg1);
 109     else
 110         init_pair (mc_color_pair->pair_index, fg2, bg2);
 111     mc_tty_color_save_attr (mc_color_pair->pair_index, attr);
 112 }
 113
 114 /* --------------------------------------------------------------------------------------------- */
 115 /*** public functions ****************************************************************************/
 116 /* --------------------------------------------------------------------------------------------- */
 117
 118 void
 119 tty_color_init_lib (gboolean disable, gboolean force)
 120 {
 121     (void) force;
 122
 123     if (has_colors () && !disable)
 124     {
 125         use_colors = TRUE;
 126         start_color ();
 127         use_default_colors ();
 128     }
 129
 130     mc_tty_color_color_pair_attrs = g_hash_table_new_full
 131         (g_int_hash, g_int_equal, mc_tty_color_attr_destroy_cb, mc_tty_color_attr_destroy_cb);
 132 }
 133
 134 /* --------------------------------------------------------------------------------------------- */
 135
 136 void
 137 tty_color_deinit_lib (void)
 138 {
 139     g_hash_table_destroy (mc_tty_color_color_pair_attrs);
 140     mc_tty_color_color_pair_attrs = NULL;
 141 }
 142
 143 /* --------------------------------------------------------------------------------------------- */
 144
 145 void
 146 tty_color_try_alloc_pair_lib (tty_color_pair_t * mc_color_pair)
 147 {
 148
 149     if (mc_color_pair->ifg <= (int) SPEC_A_REVERSE)
 150     {
 151         switch (mc_color_pair->ifg)
 152         {
 153         case SPEC_A_REVERSE:
 154             mc_tty_color_pair_init_special (mc_color_pair,
 155                                             COLOR_BLACK, COLOR_WHITE,
 156                                             COLOR_BLACK, COLOR_WHITE | A_BOLD, A_REVERSE);
 157             break;
 158         case SPEC_A_BOLD:
 159             mc_tty_color_pair_init_special (mc_color_pair,
 160                                             COLOR_WHITE, COLOR_BLACK,
 161                                             COLOR_WHITE, COLOR_BLACK, A_BOLD);
 162             break;
 163         case SPEC_A_BOLD_REVERSE:
 164             mc_tty_color_pair_init_special (mc_color_pair,
 165                                             COLOR_WHITE, COLOR_WHITE,
 166                                             COLOR_WHITE, COLOR_WHITE, A_BOLD | A_REVERSE);
 167             break;
 168         case SPEC_A_UNDERLINE:
 169             mc_tty_color_pair_init_special (mc_color_pair,
 170                                             COLOR_WHITE, COLOR_BLACK,
 171                                             COLOR_WHITE, COLOR_BLACK, A_UNDERLINE);
 172             break;
 173         }
 174     }
 175     else
 176     {
 177         int ifg, ibg, attr;
 178
 179         ifg = mc_color_pair->ifg;
 180         ibg = mc_color_pair->ibg;
 181         attr = mc_color_pair->attr;
 182
 183
 184         /* In non-256 color mode, change bright colors into bold */
 185         if (!tty_use_256colors ())
 186         {
 187             if (ifg >= 8 && ifg < 16)
 188             {
 189                 ifg &= 0x07;
 190                 attr |= A_BOLD;
 191             }
 192
 193             if (ibg >= 8 && ibg < 16)
 194             {
 195                 ibg &= 0x07;
 196                 /* attr | = A_BOLD | A_REVERSE ; */
 197             }
 198         }
 199
 200         init_pair (mc_color_pair->pair_index, ifg, ibg);
 201         mc_tty_color_save_attr (mc_color_pair->pair_index, attr);
 202     }
 203 }
 204
 205 /* --------------------------------------------------------------------------------------------- */
 206
 207 void
 208 tty_setcolor (int color)
 209 {
 210     attrset (COLOR_PAIR (color) | color_get_attr (color));
 211 }
 212
 213 /* --------------------------------------------------------------------------------------------- */
 214
 215 void
 216 tty_lowlevel_setcolor (int color)
 217 {
 218     tty_setcolor (color);
 219 }
 220
 221 /* --------------------------------------------------------------------------------------------- */
 222
 223 void
 224 tty_set_normal_attrs (void)
 225 {
 226     standend ();
 227 }
 228
 229 /* --------------------------------------------------------------------------------------------- */
 230
 231 gboolean
 232 tty_use_256colors (void)
 233 {
 234     return (COLORS == 256);
 235 }
 236
 237 /* --------------------------------------------------------------------------------------------- */