Merge branch 'rs/nth-switch-code-simplification'
[git/git.git] / color.h
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1#ifndef COLOR_H
2#define COLOR_H
3
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4struct strbuf;
5
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6/*
7 * The maximum length of ANSI color sequence we would generate:
8 * - leading ESC '[' 2
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9 * - attr + ';' 2 * num_attr (e.g. "1;")
10 * - no-attr + ';' 3 * num_attr (e.g. "22;")
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11 * - fg color + ';' 17 (e.g. "38;2;255;255;255;")
12 * - bg color + ';' 17 (e.g. "48;2;255;255;255;")
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13 * - terminating 'm' NUL 2
14 *
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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).
54590a0e 19 *
9dc3515c 20 * We allocate space for 7 attributes.
8b124135 21 */
9dc3515c 22#define COLOR_MAXLEN 75
7c92fe0e 23
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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"
427fc5b8 31#define GIT_COLOR_MAGENTA "\033[35m"
dc6ebd4c 32#define GIT_COLOR_CYAN "\033[36m"
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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"
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39#define GIT_COLOR_FAINT_RED "\033[2;31m"
40#define GIT_COLOR_FAINT_GREEN "\033[2;32m"
41#define GIT_COLOR_FAINT_YELLOW "\033[2;33m"
42#define GIT_COLOR_FAINT_BLUE "\033[2;34m"
43#define GIT_COLOR_FAINT_MAGENTA "\033[2;35m"
44#define GIT_COLOR_FAINT_CYAN "\033[2;36m"
dc6ebd4c 45#define GIT_COLOR_BG_RED "\033[41m"
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46#define GIT_COLOR_BG_GREEN "\033[42m"
47#define GIT_COLOR_BG_YELLOW "\033[43m"
48#define GIT_COLOR_BG_BLUE "\033[44m"
49#define GIT_COLOR_BG_MAGENTA "\033[45m"
50#define GIT_COLOR_BG_CYAN "\033[46m"
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51#define GIT_COLOR_FAINT "\033[2m"
52#define GIT_COLOR_FAINT_ITALIC "\033[2;3m"
7188260d 53#define GIT_COLOR_REVERSE "\033[7m"
dc6ebd4c 54
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55/* A special value meaning "no color selected" */
56#define GIT_COLOR_NIL "NIL"
57
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58/*
59 * The first three are chosen to match common usage in the code, and what is
60 * returned from git_config_colorbool. The "auto" value can be returned from
61 * config_colorbool, and will be converted by want_color() into either 0 or 1.
62 */
63#define GIT_COLOR_UNKNOWN -1
64#define GIT_COLOR_NEVER 0
65#define GIT_COLOR_ALWAYS 1
66#define GIT_COLOR_AUTO 2
67
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68/* A default list of colors to use for commit graphs and show-branch output */
69extern const char *column_colors_ansi[];
70extern const int column_colors_ansi_max;
6b2f2d98 71
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72/*
73 * Generally the color code will lazily figure this out itself, but
74 * this provides a mechanism for callers to override autodetection.
75 */
76extern int color_stdout_is_tty;
77
6b2f2d98 78/*
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79 * Use the first one if you need only color config; the second is a convenience
80 * if you are just going to change to git_default_config, too.
6b2f2d98 81 */
3e1dd17a 82int git_color_config(const char *var, const char *value, void *cb);
ef90d6d4 83int git_color_default_config(const char *var, const char *value, void *cb);
6b2f2d98 84
7ce4fb94 85/*
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86 * Parse a config option, which can be a boolean or one of
87 * "never", "auto", "always". Return a constant of
88 * GIT_COLOR_NEVER for "never" or negative boolean,
89 * GIT_COLOR_ALWAYS for "always" or a positive boolean,
90 * and GIT_COLOR_AUTO for "auto".
7ce4fb94 91 */
e269eb79 92int git_config_colorbool(const char *var, const char *value);
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93
94/*
95 * Return a boolean whether to use color, where the argument 'var' is
96 * one of GIT_COLOR_UNKNOWN, GIT_COLOR_NEVER, GIT_COLOR_ALWAYS, GIT_COLOR_AUTO.
97 */
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98int want_color_fd(int fd, int var);
99#define want_color(colorbool) want_color_fd(1, (colorbool))
100#define want_color_stderr(colorbool) want_color_fd(2, (colorbool))
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101
102/*
103 * Translate a Git color from 'value' into a string that the terminal can
104 * interpret and store it into 'dst'. The Git color values are of the form
105 * "foreground [background] [attr]" where fore- and background can be a color
106 * name ("red"), a RGB code (#0xFF0000) or a 256-color-mode from the terminal.
107 */
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108int color_parse(const char *value, char *dst);
109int color_parse_mem(const char *value, int len, char *dst);
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110
111/*
112 * Output the formatted string in the specified color (and then reset to normal
113 * color so subsequent output is uncolored). Omits the color encapsulation if
114 * `color` is NULL. The `color_fprintf_ln` prints a new line after resetting
115 * the color. The `color_print_strbuf` prints the contents of the given
116 * strbuf (BUG: but only up to its first NUL character).
117 */
28bea9e5 118__attribute__((format (printf, 3, 4)))
f26a0012 119int color_fprintf(FILE *fp, const char *color, const char *fmt, ...);
28bea9e5 120__attribute__((format (printf, 3, 4)))
f26a0012 121int color_fprintf_ln(FILE *fp, const char *color, const char *fmt, ...);
becbdae8 122void color_print_strbuf(FILE *fp, const char *color, const struct strbuf *sb);
7c92fe0e 123
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124/*
125 * Check if the given color is GIT_COLOR_NIL that means "no color selected".
126 * The caller needs to replace the color with the actual desired color.
127 */
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128int color_is_nil(const char *color);
129
7c92fe0e 130#endif /* COLOR_H */