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/*
Color setup for S_Lang screen library
Copyright (C) 1994-2023
Free Software Foundation, Inc.
Written by:
Andrew Borodin <aborodin@vmail.ru>, 2009
Egmont Koblinger <egmont@gmail.com>, 2010
This file is part of the Midnight Commander.
The Midnight Commander 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 3 of the License,
or (at your option) any later version.
The Midnight Commander 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, see <http://www.gnu.org/licenses/>.
*/
/** \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 "lib/util.h" /* whitespace() */
#include "tty-slang.h"
#include "color.h" /* variables */
#include "color-internal.h"
/*** global variables ****************************************************************************/
/*** file scope macro definitions ****************************************************************/
/*** file scope type declarations ****************************************************************/
/*** forward declarations (file scope functions) *************************************************/
/*** file scope variables ************************************************************************/
/* --------------------------------------------------------------------------------------------- */
/*** file scope functions ************************************************************************/
/* --------------------------------------------------------------------------------------------- */
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 = mc_global.tty.color_terminal_string;
/* check mc_global.tty.color_terminal_string */
while (*cts != '\0')
{
char *s;
size_t i = 0;
while (whitespace (*cts))
cts++;
s = cts;
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);
}
}
/* --------------------------------------------------------------------------------------------- */
/*** public functions ****************************************************************************/
/* --------------------------------------------------------------------------------------------- */
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)
{
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;
default:
break;
}
}
else
{
const char *fg, *bg;
fg = tty_color_get_name_by_index (mc_color_pair->ifg);
bg = tty_color_get_name_by_index (mc_color_pair->ibg);
SLtt_set_color (mc_color_pair->pair_index, (char *) "", (char *) fg, (char *) bg);
SLtt_add_color_attribute (mc_color_pair->pair_index, mc_color_pair->attr);
}
}
/* --------------------------------------------------------------------------------------------- */
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 ();
}
/* --------------------------------------------------------------------------------------------- */
gboolean
tty_use_256colors (GError ** error)
{
gboolean ret;
ret = (SLtt_Use_Ansi_Colors && SLtt_tgetnum ((char *) "Co") == 256);
if (!ret)
g_set_error (error, MC_ERROR, -1,
_("Your terminal doesn't even seem to support 256 colors."));
return ret;
}
/* --------------------------------------------------------------------------------------------- */
gboolean
tty_use_truecolors (GError ** error)
{
char *colorterm;
/* True color is supported since slang-2.3.1 on 64-bit machines,
and expected to be supported from slang-3 on 32-bit machines:
http://lists.jedsoft.org/lists/slang-users/2016/0000014.html.
Check for sizeof (long) being 8, exactly as slang does. */
if (SLang_Version < 20301 || (sizeof (long) != 8 && SLang_Version < 30000))
{
g_set_error (error, MC_ERROR, -1, _("True color not supported in this slang version."));
return FALSE;
}
/* Duplicate slang's check so that we can pop up an error message
rather than silently use wrong colors. */
colorterm = getenv ("COLORTERM");
if (colorterm == NULL
|| (strcmp (colorterm, "truecolor") != 0 && strcmp (colorterm, "24bit") != 0))
{
g_set_error (error, MC_ERROR, -1,
_("Set COLORTERM=truecolor if your terminal really supports true colors."));
return FALSE;
}
return TRUE;
}
/* --------------------------------------------------------------------------------------------- */
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