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Diffstat (limited to 'lib/tty/color-internal.c')
| -rw-r--r-- | lib/tty/color-internal.c | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/lib/tty/color-internal.c b/lib/tty/color-internal.c new file mode 100644 index 0000000..8db2b6c --- /dev/null +++ b/lib/tty/color-internal.c @@ -0,0 +1,244 @@ +/* + 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; +} + +/* --------------------------------------------------------------------------------------------- */ |