Andrew's git - gitweb.git/blob

   1#ifndef COLOR_H
   2#define COLOR_H
   3
   4struct strbuf;
   5
   6/*
   7 * The maximum length of ANSI color sequence we would generate:
   8 * - leading ESC '['            2
   9 * - attr + ';'                 2 * num_attr (e.g. "1;")
  10 * - no-attr + ';'              3 * num_attr (e.g. "22;")
  11 * - fg color + ';'             17 (e.g. "38;2;255;255;255;")
  12 * - bg color + ';'             17 (e.g. "48;2;255;255;255;")
  13 * - terminating 'm' NUL        2
  14 *
  15 * The above overcounts by one semicolon but it is close enough.
  16 *
  17 * The space for attributes is also slightly overallocated, as
  18 * the negation for some attributes is the same (e.g., nobold and nodim).
  19 *
  20 * We allocate space for 7 attributes.
  21 */
  22#define COLOR_MAXLEN 75
  23
  24#define GIT_COLOR_NORMAL        ""
  25#define GIT_COLOR_RESET         "\033[m"
  26#define GIT_COLOR_BOLD          "\033[1m"
  27#define GIT_COLOR_RED           "\033[31m"
  28#define GIT_COLOR_GREEN         "\033[32m"
  29#define GIT_COLOR_YELLOW        "\033[33m"
  30#define GIT_COLOR_BLUE          "\033[34m"
  31#define GIT_COLOR_MAGENTA       "\033[35m"
  32#define GIT_COLOR_CYAN          "\033[36m"
  33#define GIT_COLOR_BOLD_RED      "\033[1;31m"
  34#define GIT_COLOR_BOLD_GREEN    "\033[1;32m"
  35#define GIT_COLOR_BOLD_YELLOW   "\033[1;33m"
  36#define GIT_COLOR_BOLD_BLUE     "\033[1;34m"
  37#define GIT_COLOR_BOLD_MAGENTA  "\033[1;35m"
  38#define GIT_COLOR_BOLD_CYAN     "\033[1;36m"
  39#define GIT_COLOR_BG_RED        "\033[41m"
  40#define GIT_COLOR_BG_GREEN      "\033[42m"
  41#define GIT_COLOR_BG_YELLOW     "\033[43m"
  42#define GIT_COLOR_BG_BLUE       "\033[44m"
  43#define GIT_COLOR_BG_MAGENTA    "\033[45m"
  44#define GIT_COLOR_BG_CYAN       "\033[46m"
  45#define GIT_COLOR_FAINT         "\033[2m"
  46#define GIT_COLOR_FAINT_ITALIC  "\033[2;3m"
  47
  48/* A special value meaning "no color selected" */
  49#define GIT_COLOR_NIL "NIL"
  50
  51/*
  52 * The first three are chosen to match common usage in the code, and what is
  53 * returned from git_config_colorbool. The "auto" value can be returned from
  54 * config_colorbool, and will be converted by want_color() into either 0 or 1.
  55 */
  56#define GIT_COLOR_UNKNOWN -1
  57#define GIT_COLOR_NEVER  0
  58#define GIT_COLOR_ALWAYS 1
  59#define GIT_COLOR_AUTO   2
  60
  61/* A default list of colors to use for commit graphs and show-branch output */
  62extern const char *column_colors_ansi[];
  63extern const int column_colors_ansi_max;
  64
  65/*
  66 * Generally the color code will lazily figure this out itself, but
  67 * this provides a mechanism for callers to override autodetection.
  68 */
  69extern int color_stdout_is_tty;
  70
  71/*
  72 * Use the first one if you need only color config; the second is a convenience
  73 * if you are just going to change to git_default_config, too.
  74 */
  75int git_color_config(const char *var, const char *value, void *cb);
  76int git_color_default_config(const char *var, const char *value, void *cb);
  77
  78/*
  79 * Parse a config option, which can be a boolean or one of
  80 * "never", "auto", "always". Return a constant of
  81 * GIT_COLOR_NEVER for "never" or negative boolean,
  82 * GIT_COLOR_ALWAYS for "always" or a positive boolean,
  83 * and GIT_COLOR_AUTO for "auto".
  84 */
  85int git_config_colorbool(const char *var, const char *value);
  86
  87/*
  88 * Return a boolean whether to use color, where the argument 'var' is
  89 * one of GIT_COLOR_UNKNOWN, GIT_COLOR_NEVER, GIT_COLOR_ALWAYS, GIT_COLOR_AUTO.
  90 */
  91int want_color_fd(int fd, int var);
  92#define want_color(colorbool) want_color_fd(1, (colorbool))
  93#define want_color_stderr(colorbool) want_color_fd(2, (colorbool))
  94
  95/*
  96 * Translate a Git color from 'value' into a string that the terminal can
  97 * interpret and store it into 'dst'. The Git color values are of the form
  98 * "foreground [background] [attr]" where fore- and background can be a color
  99 * name ("red"), a RGB code (#0xFF0000) or a 256-color-mode from the terminal.
 100 */
 101int color_parse(const char *value, char *dst);
 102int color_parse_mem(const char *value, int len, char *dst);
 103
 104/*
 105 * Output the formatted string in the specified color (and then reset to normal
 106 * color so subsequent output is uncolored). Omits the color encapsulation if
 107 * `color` is NULL. The `color_fprintf_ln` prints a new line after resetting
 108 * the color.  The `color_print_strbuf` prints the contents of the given
 109 * strbuf (BUG: but only up to its first NUL character).
 110 */
 111__attribute__((format (printf, 3, 4)))
 112int color_fprintf(FILE *fp, const char *color, const char *fmt, ...);
 113__attribute__((format (printf, 3, 4)))
 114int color_fprintf_ln(FILE *fp, const char *color, const char *fmt, ...);
 115void color_print_strbuf(FILE *fp, const char *color, const struct strbuf *sb);
 116
 117/*
 118 * Check if the given color is GIT_COLOR_NIL that means "no color selected".
 119 * The caller needs to replace the color with the actual desired color.
 120 */
 121int color_is_nil(const char *color);
 122
 123#endif /* COLOR_H */