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/*
Internal stuff of color setup
Copyright (C) 1994-2023
Free Software Foundation, Inc.
Written by:
Andrew Borodin <aborodin@vmail.ru>, 2009
Slava Zanko <slavazanko@gmail.com>, 2009, 2013
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-internal.c
* \brief Source: Internal stuff of color setup
*/
#include <config.h>
#include <string.h> /* strcmp */
#include "color.h" /* colors and attributes */
#include "color-internal.h"
/*** global variables ****************************************************************************/
gboolean mc_tty_color_disable;
/*** file scope macro definitions ****************************************************************/
#define COLOR_INTENSITY 8
/*** file scope type declarations ****************************************************************/
typedef struct mc_tty_color_table_struct
{
const char *name;
int value;
} mc_tty_color_table_t;
/*** forward declarations (file scope functions) *************************************************/
/*** file scope variables ************************************************************************/
static mc_tty_color_table_t const color_table[] = {
{"black", COLOR_BLACK},
{"gray", COLOR_BLACK + COLOR_INTENSITY},
{"red", COLOR_RED},
{"brightred", COLOR_RED + COLOR_INTENSITY},
{"green", COLOR_GREEN},
{"brightgreen", COLOR_GREEN + COLOR_INTENSITY},
{"brown", COLOR_YELLOW},
{"yellow", COLOR_YELLOW + COLOR_INTENSITY},
{"blue", COLOR_BLUE},
{"brightblue", COLOR_BLUE + COLOR_INTENSITY},
{"magenta", COLOR_MAGENTA},
{"brightmagenta", COLOR_MAGENTA + COLOR_INTENSITY},
{"cyan", COLOR_CYAN},
{"brightcyan", COLOR_CYAN + COLOR_INTENSITY},
{"lightgray", COLOR_WHITE},
{"white", COLOR_WHITE + COLOR_INTENSITY},
{"default", -1}, /* default color of the terminal */
/* special colors */
{"A_REVERSE", SPEC_A_REVERSE},
{"A_BOLD", SPEC_A_BOLD},
{"A_BOLD_REVERSE", SPEC_A_BOLD_REVERSE},
{"A_UNDERLINE", SPEC_A_UNDERLINE},
/* End of list */
{NULL, 0}
};
static mc_tty_color_table_t const attributes_table[] = {
{"bold", A_BOLD},
#ifdef A_ITALIC /* available since ncurses-5.9-20130831 / slang-pre2.3.0-107 */
{"italic", A_ITALIC},
#endif /* A_ITALIC */
{"underline", A_UNDERLINE},
{"reverse", A_REVERSE},
{"blink", A_BLINK},
/* End of list */
{NULL, 0}
};
/* --------------------------------------------------------------------------------------------- */
/*** file scope functions ************************************************************************/
/* --------------------------------------------------------------------------------------------- */
static inline int
parse_hex_digit (char c)
{
if (c >= '0' && c <= '9')
return c - '0';
c |= 0x20;
if (c >= 'a' && c <= 'f')
return c - 'a' + 10;
return -1;
}
/* --------------------------------------------------------------------------------------------- */
static int
parse_256_or_true_color_name (const char *color_name)
{
int i;
char dummy;
/* cppcheck-suppress invalidscanf */
if (sscanf (color_name, "color%d%c", &i, &dummy) == 1 && i >= 0 && i < 256)
{
return i;
}
/* cppcheck-suppress invalidscanf */
if (sscanf (color_name, "gray%d%c", &i, &dummy) == 1 && i >= 0 && i < 24)
{
return 232 + i;
}
if (strncmp (color_name, "rgb", 3) == 0 &&
color_name[3] >= '0' && color_name[3] < '6' &&
color_name[4] >= '0' && color_name[4] < '6' &&
color_name[5] >= '0' && color_name[5] < '6' && color_name[6] == '\0')
{
return 16 + 36 * (color_name[3] - '0') + 6 * (color_name[4] - '0') + (color_name[5] - '0');
}
if (color_name[0] == '#')
{
int len;
color_name++;
len = (int) strlen (color_name);
if (len == 3 || len == 6)
{
int h[6];
for (i = 0; i < len; i++)
{
h[i] = parse_hex_digit (color_name[i]);
if (h[i] == -1)
return -1;
}
if (i == 3)
i = (h[0] << 20) | (h[0] << 16) | (h[1] << 12) | (h[1] << 8) | (h[2] << 4) | h[2];
else
i = (h[0] << 20) | (h[1] << 16) | (h[2] << 12) | (h[3] << 8) | (h[4] << 4) | h[5];
return (1 << 24) | i;
}
}
return -1;
}
/* --------------------------------------------------------------------------------------------- */
/*** public functions ****************************************************************************/
/* --------------------------------------------------------------------------------------------- */
const char *
tty_color_get_name_by_index (int idx)
{
int i;
/* Find the real English name of the first 16 colors, */
/* as well as the A_* special values. */
for (i = 0; color_table[i].name != NULL; i++)
if (idx == color_table[i].value)
return color_table[i].name;
/* Create and return the strings in "colorNNN" or "#rrggbb" format. */
if ((idx >= 16 && idx < 256) || (idx & (1 << 24)) != 0)
{
char name[9];
if (idx < 256)
sprintf (name, "color%d", idx);
else
sprintf (name, "#%06X", (unsigned int) idx & 0xFFFFFF);
return g_intern_string (name);
}
return "default";
}
/* --------------------------------------------------------------------------------------------- */
int
tty_color_get_index_by_name (const char *color_name)
{
if (color_name != NULL)
{
size_t i;
for (i = 0; color_table[i].name != NULL; i++)
if (strcmp (color_name, color_table[i].name) == 0)
return color_table[i].value;
return parse_256_or_true_color_name (color_name);
}
return -1;
}
/* --------------------------------------------------------------------------------------------- */
int
tty_attr_get_bits (const char *attrs)
{
int attr_bits = 0;
if (attrs != NULL)
{
gchar **attr_list;
int i;
attr_list = g_strsplit (attrs, "+", -1);
for (i = 0; attr_list[i] != NULL; i++)
{
int j;
for (j = 0; attributes_table[j].name != NULL; j++)
{
if (strcmp (attr_list[i], attributes_table[j].name) == 0)
{
attr_bits |= attributes_table[j].value;
break;
}
}
}
g_strfreev (attr_list);
}
return attr_bits;
}
/* --------------------------------------------------------------------------------------------- */
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