/* Color setup for S_Lang screen library
   Copyright (C) 1994, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
   2007, 2008, 2009 Free Software Foundation, Inc.
   
   Written by:
   Andrew Borodin <aborodin@vmail.ru>, 2009.
   
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */

/** \file color-slang.c
 *  \brief Source: S-Lang-specific color setup
 */

#include <config.h>

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>          /* size_t */

#include "lib/global.h"

#include "tty-slang.h"
#include "color.h"        /* variables */
#include "color-internal.h"

#include "src/setup.h"    /* color_terminal_string */

static int
has_colors (gboolean disable, gboolean force)
{
    mc_tty_color_disable = disable;

    if (force || (getenv ("COLORTERM") != NULL))
        SLtt_Use_Ansi_Colors = 1;

    if (!mc_tty_color_disable) {
        const char *terminal = getenv ("TERM");
        const size_t len = strlen (terminal);

        char *cts = color_terminal_string;
        char *s;
        size_t i;

        /* check color_terminal_string */
        while (*cts != '\0') {
            while (*cts == ' ' || *cts == '\t')
                cts++;
            s = cts;
            i = 0;

            while (*cts != '\0' && *cts != ',') {
                cts++;
                i++;
            }

            if ((i != 0) && (i == len) && (strncmp (s, terminal, i) == 0))
                SLtt_Use_Ansi_Colors = 1;

            if (*cts == ',')
                cts++;
        }
    }
    return SLtt_Use_Ansi_Colors;
}

static void
mc_tty_color_pair_init_special (tty_color_pair_t * mc_color_pair,
                                const char *fg1, const char *bg1,
                                const char *fg2, const char *bg2, SLtt_Char_Type mask)
{
    if (SLtt_Use_Ansi_Colors != 0) {
        if (!mc_tty_color_disable) {
            SLtt_set_color (mc_color_pair->pair_index, (char *) "", (char *) fg1, (char *) bg1);
        } else {
            SLtt_set_color (mc_color_pair->pair_index, (char *) "", (char *) fg2, (char *) bg2);
        }
    } else {
        SLtt_set_mono (mc_color_pair->pair_index, NULL, mask);
    }
}

void
tty_color_init_lib (gboolean disable, gboolean force)
{
    /* FIXME: if S-Lang is used, has_colors() must be called regardless
       of whether we are interested in its result */
    if (has_colors (disable, force) && !disable) {
        use_colors = TRUE;
    }
}

void
tty_color_deinit_lib (void)
{
}

void
tty_color_try_alloc_pair_lib (tty_color_pair_t * mc_color_pair)
{
    const char *fg, *bg;
    if (mc_color_pair->ifg <= (int) SPEC_A_REVERSE) {
        switch (mc_color_pair->ifg) {
        case SPEC_A_REVERSE:
            mc_tty_color_pair_init_special (mc_color_pair,
                                            "black", "white", "black", "lightgray", SLTT_REV_MASK);
            break;
        case SPEC_A_BOLD:
            mc_tty_color_pair_init_special (mc_color_pair,
                                            "white", "black", "white", "black", SLTT_BOLD_MASK);
            break;
        case SPEC_A_BOLD_REVERSE:

            mc_tty_color_pair_init_special (mc_color_pair,
                                            "white", "white",
                                            "white", "white", SLTT_BOLD_MASK | SLTT_REV_MASK);
            break;
        case SPEC_A_UNDERLINE:
            mc_tty_color_pair_init_special (mc_color_pair,
                                            "white", "black", "white", "black", SLTT_ULINE_MASK);
            break;
        }
    } else {
        fg = (mc_color_pair->cfg) ? mc_color_pair->cfg : "default";
        bg = (mc_color_pair->cbg) ? mc_color_pair->cbg : "default";
        SLtt_set_color (mc_color_pair->pair_index, (char *) "", (char *) fg, (char *) bg);
    }
}

void
tty_setcolor (int color)
{
    SLsmg_set_color (color);
}

/* Set colorpair by index, don't interpret S-Lang "emulated attributes" */
void
tty_lowlevel_setcolor (int color)
{
    SLsmg_set_color (color & 0x7F);
}

void
tty_set_normal_attrs (void)
{
    SLsmg_normal_video ();
}