color.h

   1 #ifndef COLOR_H
   2 #define COLOR_H
   3
   4 struct strbuf;
   5
   6 /*
   7  * The maximum length of ANSI color sequence we would generate:
   8  * - leading ESC '['            2
   9  * - reset ';' .................1
  10  * - attr + ';'                 2 * num_attr (e.g. "1;")
  11  * - no-attr + ';'              3 * num_attr (e.g. "22;")
  12  * - fg color + ';'             17 (e.g. "38;2;255;255;255;")
  13  * - bg color + ';'             17 (e.g. "48;2;255;255;255;")
  14  * - terminating 'm' NUL        2
  15  *
  16  * The above overcounts by one semicolon but it is close enough.
  17  *
  18  * The space for attributes is also slightly overallocated, as
  19  * the negation for some attributes is the same (e.g., nobold and nodim).
  20  *
  21  * We allocate space for 7 attributes.
  22  */
  23 #define COLOR_MAXLEN 75
  24
  25 #define GIT_COLOR_NORMAL        ""
  26 #define GIT_COLOR_RESET         "\033[m"
  27 #define GIT_COLOR_BOLD          "\033[1m"
  28 #define GIT_COLOR_BLACK         "\033[30m"
  29 #define GIT_COLOR_RED           "\033[31m"
  30 #define GIT_COLOR_GREEN         "\033[32m"
  31 #define GIT_COLOR_YELLOW        "\033[33m"
  32 #define GIT_COLOR_BLUE          "\033[34m"
  33 #define GIT_COLOR_MAGENTA       "\033[35m"
  34 #define GIT_COLOR_CYAN          "\033[36m"
  35 #define GIT_COLOR_WHITE         "\033[37m"
  36 #define GIT_COLOR_DEFAULT       "\033[39m"
  37 #define GIT_COLOR_BOLD_BLACK    "\033[1;30m"
  38 #define GIT_COLOR_BOLD_RED      "\033[1;31m"
  39 #define GIT_COLOR_BOLD_GREEN    "\033[1;32m"
  40 #define GIT_COLOR_BOLD_YELLOW   "\033[1;33m"
  41 #define GIT_COLOR_BOLD_BLUE     "\033[1;34m"
  42 #define GIT_COLOR_BOLD_MAGENTA  "\033[1;35m"
  43 #define GIT_COLOR_BOLD_CYAN     "\033[1;36m"
  44 #define GIT_COLOR_BOLD_WHITE    "\033[1;37m"
  45 #define GIT_COLOR_BOLD_DEFAULT  "\033[1;39m"
  46 #define GIT_COLOR_FAINT_BLACK   "\033[2;30m"
  47 #define GIT_COLOR_FAINT_RED     "\033[2;31m"
  48 #define GIT_COLOR_FAINT_GREEN   "\033[2;32m"
  49 #define GIT_COLOR_FAINT_YELLOW  "\033[2;33m"
  50 #define GIT_COLOR_FAINT_BLUE    "\033[2;34m"
  51 #define GIT_COLOR_FAINT_MAGENTA "\033[2;35m"
  52 #define GIT_COLOR_FAINT_CYAN    "\033[2;36m"
  53 #define GIT_COLOR_FAINT_WHITE   "\033[2;37m"
  54 #define GIT_COLOR_FAINT_DEFAULT "\033[2;39m"
  55 #define GIT_COLOR_BG_BLACK      "\033[40m"
  56 #define GIT_COLOR_BG_RED        "\033[41m"
  57 #define GIT_COLOR_BG_GREEN      "\033[42m"
  58 #define GIT_COLOR_BG_YELLOW     "\033[43m"
  59 #define GIT_COLOR_BG_BLUE       "\033[44m"
  60 #define GIT_COLOR_BG_MAGENTA    "\033[45m"
  61 #define GIT_COLOR_BG_CYAN       "\033[46m"
  62 #define GIT_COLOR_BG_WHITE      "\033[47m"
  63 #define GIT_COLOR_BG_DEFAULT    "\033[49m"
  64 #define GIT_COLOR_FAINT         "\033[2m"
  65 #define GIT_COLOR_FAINT_ITALIC  "\033[2;3m"
  66 #define GIT_COLOR_REVERSE       "\033[7m"
  67
  68 /* A special value meaning "no color selected" */
  69 #define GIT_COLOR_NIL "NIL"
  70
  71 /*
  72  * The first three are chosen to match common usage in the code, and what is
  73  * returned from git_config_colorbool. The "auto" value can be returned from
  74  * config_colorbool, and will be converted by want_color() into either 0 or 1.
  75  */
  76 #define GIT_COLOR_UNKNOWN -1
  77 #define GIT_COLOR_NEVER  0
  78 #define GIT_COLOR_ALWAYS 1
  79 #define GIT_COLOR_AUTO   2
  80
  81 /* A default list of colors to use for commit graphs and show-branch output */
  82 extern const char *column_colors_ansi[];
  83 extern const int column_colors_ansi_max;
  84
  85 /*
  86  * Generally the color code will lazily figure this out itself, but
  87  * this provides a mechanism for callers to override autodetection.
  88  */
  89 extern int color_stdout_is_tty;
  90
  91 /*
  92  * Use the first one if you need only color config; the second is a convenience
  93  * if you are just going to change to git_default_config, too.
  94  */
  95 int git_color_config(const char *var, const char *value, void *cb);
  96 int git_color_default_config(const char *var, const char *value, void *cb);
  97
  98 /*
  99  * Parse a config option, which can be a boolean or one of
 100  * "never", "auto", "always". Return a constant of
 101  * GIT_COLOR_NEVER for "never" or negative boolean,
 102  * GIT_COLOR_ALWAYS for "always" or a positive boolean,
 103  * and GIT_COLOR_AUTO for "auto".
 104  */
 105 int git_config_colorbool(const char *var, const char *value);
 106
 107 /*
 108  * Return a boolean whether to use color, where the argument 'var' is
 109  * one of GIT_COLOR_UNKNOWN, GIT_COLOR_NEVER, GIT_COLOR_ALWAYS, GIT_COLOR_AUTO.
 110  */
 111 int want_color_fd(int fd, int var);
 112 #define want_color(colorbool) want_color_fd(1, (colorbool))
 113 #define want_color_stderr(colorbool) want_color_fd(2, (colorbool))
 114
 115 /*
 116  * Translate a Git color from 'value' into a string that the terminal can
 117  * interpret and store it into 'dst'. The Git color values are of the form
 118  * "foreground [background] [attr]" where fore- and background can be a color
 119  * name ("red"), a RGB code (#0xFF0000) or a 256-color-mode from the terminal.
 120  */
 121 int color_parse(const char *value, char *dst);
 122 int color_parse_mem(const char *value, int len, char *dst);
 123
 124 /*
 125  * Output the formatted string in the specified color (and then reset to normal
 126  * color so subsequent output is uncolored). Omits the color encapsulation if
 127  * `color` is NULL. The `color_fprintf_ln` prints a new line after resetting
 128  * the color.  The `color_print_strbuf` prints the contents of the given
 129  * strbuf (BUG: but only up to its first NUL character).
 130  */
 131 __attribute__((format (printf, 3, 4)))
 132 int color_fprintf(FILE *fp, const char *color, const char *fmt, ...);
 133 __attribute__((format (printf, 3, 4)))
 134 int color_fprintf_ln(FILE *fp, const char *color, const char *fmt, ...);
 135 void color_print_strbuf(FILE *fp, const char *color, const struct strbuf *sb);
 136
 137 /*
 138  * Check if the given color is GIT_COLOR_NIL that means "no color selected".
 139  * The caller needs to replace the color with the actual desired color.
 140  */
 141 int color_is_nil(const char *color);
 142
 143 #endif /* COLOR_H */