src/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 "../../src/global.h"
  34
  35 #include "../../src/tty/tty-ncurses.h"
  36 #include "../../src/tty/color.h"        /* variables */
  37 #include "../../src/tty/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     attr = g_new0 (int, 1);
  65     if (attr == NULL)
  66         return color_attr;
  67
  68     key = g_new0 (int, 1);
  69     if (key == NULL) {
  70         g_free (attr);
  71         return color_attr;
  72     }
  73     memcpy (key, &color_pair, sizeof (int));
  74
  75     if (color_attr != -1)
  76         *attr = color_attr & (A_BOLD | A_REVERSE | A_UNDERLINE);
  77     g_hash_table_replace (mc_tty_color_color_pair_attrs, (gpointer) key, (gpointer) attr);
  78     return color_attr & (~(*attr));
  79 }
  80
  81 /* --------------------------------------------------------------------------------------------- */
  82
  83 static int
  84 color_get_attr (int color_pair)
  85 {
  86     int *fnd;
  87
  88     if (mc_tty_color_color_pair_attrs == NULL)
  89         return 0;
  90
  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 ()) {
 102         if (!mc_tty_color_disable) {
 103             init_pair (mc_color_pair->pair_index,
 104                        mc_tty_color_save_attr_lib (mc_color_pair->pair_index, fg1 | mask), bg1);
 105         } else {
 106             init_pair (mc_color_pair->pair_index,
 107                        mc_tty_color_save_attr_lib (mc_color_pair->pair_index, fg2 | mask), bg2);
 108         }
 109     }
 110 #if 0
 111     else {
 112         SLtt_set_mono (mc_color_pair->pair_index, NULL, mask);
 113     }
 114 #endif
 115 }
 116
 117 /* --------------------------------------------------------------------------------------------- */
 118 /*** public functions ****************************************************************************/
 119 /* --------------------------------------------------------------------------------------------- */
 120
 121 void
 122 tty_color_init_lib (gboolean disable, gboolean force)
 123 {
 124     (void) force;
 125
 126     if (has_colors () && !disable) {
 127         use_colors = TRUE;
 128         start_color ();
 129         use_default_colors ();
 130     }
 131
 132     mc_tty_color_color_pair_attrs = g_hash_table_new_full
 133         (g_int_hash, g_int_equal, mc_tty_color_attr_destroy_cb, mc_tty_color_attr_destroy_cb);
 134 }
 135
 136 /* --------------------------------------------------------------------------------------------- */
 137
 138 void
 139 tty_color_deinit_lib (void)
 140 {
 141     g_hash_table_destroy (mc_tty_color_color_pair_attrs);
 142     mc_tty_color_color_pair_attrs = NULL;
 143 }
 144
 145 /* --------------------------------------------------------------------------------------------- */
 146
 147 void
 148 tty_color_try_alloc_pair_lib (tty_color_pair_t * mc_color_pair)
 149 {
 150     if (mc_color_pair->ifg <= (int) SPEC_A_REVERSE) {
 151         switch (mc_color_pair->ifg) {
 152         case SPEC_A_REVERSE:
 153             mc_tty_color_pair_init_special (mc_color_pair,
 154                                             COLOR_BLACK, COLOR_WHITE,
 155                                             COLOR_BLACK, COLOR_WHITE | A_BOLD, A_REVERSE);
 156             break;
 157         case SPEC_A_BOLD:
 158             mc_tty_color_pair_init_special (mc_color_pair,
 159                                             COLOR_WHITE, COLOR_BLACK,
 160                                             COLOR_WHITE, COLOR_BLACK, A_BOLD);
 161             break;
 162         case SPEC_A_BOLD_REVERSE:
 163
 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     } else {
 175         init_pair (mc_color_pair->pair_index,
 176                    mc_tty_color_save_attr_lib (mc_color_pair->pair_index,
 177                                                mc_color_pair->ifg) & COLOR_WHITE,
 178                    mc_color_pair->ibg & COLOR_WHITE);
 179     }
 180 }
 181
 182 /* --------------------------------------------------------------------------------------------- */
 183
 184 void
 185 tty_setcolor (int color)
 186 {
 187     attrset (COLOR_PAIR (color) | color_get_attr (color));
 188 }
 189
 190 /* --------------------------------------------------------------------------------------------- */
 191
 192 void
 193 tty_lowlevel_setcolor (int color)
 194 {
 195     attrset (COLOR_PAIR (color) | color_get_attr (color));
 196 }
 197
 198 /* --------------------------------------------------------------------------------------------- */
 199
 200 void
 201 tty_set_normal_attrs (void)
 202 {
 203     standend ();
 204 }
 205
 206 /* --------------------------------------------------------------------------------------------- */