lib/tty/color-slang.c

   1 /* Color setup for S_Lang 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-slang.c
  23  *  \brief Source: S-Lang-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-slang.h"
  36 #include "../../src/tty/color.h"        /* variables */
  37 #include "../../src/tty/color-internal.h"
  38
  39 #include "../../src/setup.h"    /* color_terminal_string */
  40
  41 static int
  42 has_colors (gboolean disable, gboolean force)
  43 {
  44     mc_tty_color_disable = disable;
  45
  46     if (force || (getenv ("COLORTERM") != NULL))
  47         SLtt_Use_Ansi_Colors = 1;
  48
  49     if (!mc_tty_color_disable) {
  50         const char *terminal = getenv ("TERM");
  51         const size_t len = strlen (terminal);
  52
  53         char *cts = color_terminal_string;
  54         char *s;
  55         size_t i;
  56
  57         /* check color_terminal_string */
  58         while (*cts != '\0') {
  59             while (*cts == ' ' || *cts == '\t')
  60                 cts++;
  61             s = cts;
  62             i = 0;
  63
  64             while (*cts != '\0' && *cts != ',') {
  65                 cts++;
  66                 i++;
  67             }
  68
  69             if ((i != 0) && (i == len) && (strncmp (s, terminal, i) == 0))
  70                 SLtt_Use_Ansi_Colors = 1;
  71
  72             if (*cts == ',')
  73                 cts++;
  74         }
  75     }
  76     return SLtt_Use_Ansi_Colors;
  77 }
  78
  79 static void
  80 mc_tty_color_pair_init_special (tty_color_pair_t * mc_color_pair,
  81                                 const char *fg1, const char *bg1,
  82                                 const char *fg2, const char *bg2, SLtt_Char_Type mask)
  83 {
  84     if (SLtt_Use_Ansi_Colors != 0) {
  85         if (!mc_tty_color_disable) {
  86             SLtt_set_color (mc_color_pair->pair_index, (char *) "", (char *) fg1, (char *) bg1);
  87         } else {
  88             SLtt_set_color (mc_color_pair->pair_index, (char *) "", (char *) fg2, (char *) bg2);
  89         }
  90     } else {
  91         SLtt_set_mono (mc_color_pair->pair_index, NULL, mask);
  92     }
  93 }
  94
  95 void
  96 tty_color_init_lib (gboolean disable, gboolean force)
  97 {
  98     /* FIXME: if S-Lang is used, has_colors() must be called regardless
  99        of whether we are interested in its result */
 100     if (has_colors (disable, force) && !disable) {
 101         use_colors = TRUE;
 102     }
 103 }
 104
 105 void
 106 tty_color_deinit_lib (void)
 107 {
 108 }
 109
 110 void
 111 tty_color_try_alloc_pair_lib (tty_color_pair_t * mc_color_pair)
 112 {
 113     const char *fg, *bg;
 114     if (mc_color_pair->ifg <= (int) SPEC_A_REVERSE) {
 115         switch (mc_color_pair->ifg) {
 116         case SPEC_A_REVERSE:
 117             mc_tty_color_pair_init_special (mc_color_pair,
 118                                             "black", "white", "black", "lightgray", SLTT_REV_MASK);
 119             break;
 120         case SPEC_A_BOLD:
 121             mc_tty_color_pair_init_special (mc_color_pair,
 122                                             "white", "black", "white", "black", SLTT_BOLD_MASK);
 123             break;
 124         case SPEC_A_BOLD_REVERSE:
 125
 126             mc_tty_color_pair_init_special (mc_color_pair,
 127                                             "white", "white",
 128                                             "white", "white", SLTT_BOLD_MASK | SLTT_REV_MASK);
 129             break;
 130         case SPEC_A_UNDERLINE:
 131             mc_tty_color_pair_init_special (mc_color_pair,
 132                                             "white", "black", "white", "black", SLTT_ULINE_MASK);
 133             break;
 134         }
 135     } else {
 136         fg = (mc_color_pair->cfg) ? mc_color_pair->cfg : "default";
 137         bg = (mc_color_pair->cbg) ? mc_color_pair->cbg : "default";
 138         SLtt_set_color (mc_color_pair->pair_index, (char *) "", (char *) fg, (char *) bg);
 139     }
 140 }
 141
 142 void
 143 tty_setcolor (int color)
 144 {
 145     SLsmg_set_color (color);
 146 }
 147
 148 /* Set colorpair by index, don't interpret S-Lang "emulated attributes" */
 149 void
 150 tty_lowlevel_setcolor (int color)
 151 {
 152     SLsmg_set_color (color & 0x7F);
 153 }
 154
 155 void
 156 tty_set_normal_attrs (void)
 157 {
 158     SLsmg_normal_video ();
 159 }