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 Free Software Foundation, Inc.
   4
   5    Written by:
   6    Andrew Borodin <aborodin@vmail.ru>, 2009.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  21
  22 /** \file color-ncurses.c
  23  *  \brief Source: NCUrses-specific color setup
  24  */
  25
  26 #include <config.h>
  27
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30 #include <string.h>
  31 #include <sys/types.h>          /* size_t */
  32
  33 #include "lib/global.h"
  34
  35 #include "tty-ncurses.h"
  36 #include "color.h"        /* variables */
  37 #include "color-internal.h"
  38
  39 /*** global variables ****************************************************************************/
  40
  41 /*** file scope macro definitions ****************************************************************/
  42
  43 /*** file scope type declarations ****************************************************************/
  44
  45 /*** file scope variables ************************************************************************/
  46
  47 static GHashTable *mc_tty_color_color_pair_attrs = NULL;
  48
  49 /*** file scope functions ************************************************************************/
  50 /* --------------------------------------------------------------------------------------------- */
  51
  52 static inline void
  53 mc_tty_color_attr_destroy_cb (gpointer data)
  54 {
  55     g_free (data);
  56 }
  57
  58 /* --------------------------------------------------------------------------------------------- */
  59
  60 static int
  61 mc_tty_color_save_attr_lib (int color_pair, int color_attr)
  62 {
  63     int *attr, *key;
  64
  65     attr = g_try_new0 (int, 1);
  66     if (attr == NULL)
  67         return color_attr;
  68
  69     key = g_try_new (int, 1);
  70     if (key == NULL) {
  71         g_free (attr);
  72         return color_attr;
  73     }
  74
  75     *key = color_pair;
  76
  77     if (color_attr != -1)
  78         *attr = color_attr & (A_BOLD | A_REVERSE | A_UNDERLINE);
  79     g_hash_table_replace (mc_tty_color_color_pair_attrs, (gpointer) key, (gpointer) attr);
  80     return color_attr & (~(*attr));
  81 }
  82
  83 /* --------------------------------------------------------------------------------------------- */
  84
  85 static int
  86 color_get_attr (int color_pair)
  87 {
  88     int *fnd = NULL;
  89
  90     if (mc_tty_color_color_pair_attrs != NULL)
  91         fnd = (int *) g_hash_table_lookup (mc_tty_color_color_pair_attrs, (gpointer) & color_pair);
  92     return (fnd != NULL) ? *fnd : 0;
  93 }
  94
  95 /* --------------------------------------------------------------------------------------------- */
  96
  97 static void
  98 mc_tty_color_pair_init_special (tty_color_pair_t * mc_color_pair,
  99                                 int fg1, int bg1, int fg2, int bg2, int mask)
 100 {
 101     if (has_colors () && !mc_tty_color_disable)
 102         init_pair (mc_color_pair->pair_index,
 103                     mc_tty_color_save_attr_lib (mc_color_pair->pair_index, fg1 | mask), bg1);
 104     else
 105         init_pair (mc_color_pair->pair_index,
 106                     mc_tty_color_save_attr_lib (mc_color_pair->pair_index, fg2 | mask), bg2);
 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         use_colors = TRUE;
 120         start_color ();
 121         use_default_colors ();
 122     }
 123
 124     mc_tty_color_color_pair_attrs = g_hash_table_new_full
 125         (g_int_hash, g_int_equal, mc_tty_color_attr_destroy_cb, mc_tty_color_attr_destroy_cb);
 126 }
 127
 128 /* --------------------------------------------------------------------------------------------- */
 129
 130 void
 131 tty_color_deinit_lib (void)
 132 {
 133     g_hash_table_destroy (mc_tty_color_color_pair_attrs);
 134     mc_tty_color_color_pair_attrs = NULL;
 135 }
 136
 137 /* --------------------------------------------------------------------------------------------- */
 138
 139 void
 140 tty_color_try_alloc_pair_lib (tty_color_pair_t * mc_color_pair)
 141 {
 142     if (mc_color_pair->ifg <= (int) SPEC_A_REVERSE) {
 143         switch (mc_color_pair->ifg) {
 144         case SPEC_A_REVERSE:
 145             mc_tty_color_pair_init_special (mc_color_pair,
 146                                             COLOR_BLACK, COLOR_WHITE,
 147                                             COLOR_BLACK, COLOR_WHITE | A_BOLD, A_REVERSE);
 148             break;
 149         case SPEC_A_BOLD:
 150             mc_tty_color_pair_init_special (mc_color_pair,
 151                                             COLOR_WHITE, COLOR_BLACK,
 152                                             COLOR_WHITE, COLOR_BLACK, A_BOLD);
 153             break;
 154         case SPEC_A_BOLD_REVERSE:
 155             mc_tty_color_pair_init_special (mc_color_pair,
 156                                             COLOR_WHITE, COLOR_WHITE,
 157                                             COLOR_WHITE, COLOR_WHITE, A_BOLD | A_REVERSE);
 158             break;
 159         case SPEC_A_UNDERLINE:
 160             mc_tty_color_pair_init_special (mc_color_pair,
 161                                             COLOR_WHITE, COLOR_BLACK,
 162                                             COLOR_WHITE, COLOR_BLACK, A_UNDERLINE);
 163             break;
 164         }
 165     } else {
 166         int mask_fg = (mc_color_pair->ifg == -1) ? mc_color_pair->ifg : 0xff;
 167         int mask_bg = (mc_color_pair->ibg == -1) ? mc_color_pair->ibg : 0xff;
 168
 169         init_pair (mc_color_pair->pair_index,
 170                    mc_tty_color_save_attr_lib (mc_color_pair->pair_index,
 171                                                mc_color_pair->ifg) & mask_fg,
 172                    mc_color_pair->ibg & mask_bg);
 173     }
 174 }
 175
 176 /* --------------------------------------------------------------------------------------------- */
 177
 178 void
 179 tty_setcolor (int color)
 180 {
 181     attrset (COLOR_PAIR (color) | color_get_attr (color));
 182 }
 183
 184 /* --------------------------------------------------------------------------------------------- */
 185
 186 void
 187 tty_lowlevel_setcolor (int color)
 188 {
 189     attrset (COLOR_PAIR (color) | color_get_attr (color));
 190 }
 191
 192 /* --------------------------------------------------------------------------------------------- */
 193
 194 void
 195 tty_set_normal_attrs (void)
 196 {
 197     standend ();
 198 }
 199
 200 /* --------------------------------------------------------------------------------------------- */