git/color.h
Jeff King 148135fc24 default color.status.branch to "same as header"
This gives it the same behavior as we had prior to 1d28232
(status: show branchname with a configurable color).

To do this we need the concept of a "NIL" color, which is
provided by color.[ch]. The implementation is very simple;
in particular, there are no precautions taken against code
accidentally printing the NIL. This should be fine in
practice because:

  1. You can't input a NIL color in the config, so it must
     come from the in-code defaults. Which means it is up
     the client code to handle the NILs it defines.

  2. If we do ever print a NIL, it will be obvious what the
     problem is, and the bug can be fixed.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-12-10 12:59:52 -08:00

71 lines
2.3 KiB
C

#ifndef COLOR_H
#define COLOR_H
/* 2 + (2 * num_attrs) + 8 + 1 + 8 + 'm' + NUL */
/* "\033[1;2;4;5;7;38;5;2xx;48;5;2xxm\0" */
/*
* The maximum length of ANSI color sequence we would generate:
* - leading ESC '[' 2
* - attr + ';' 2 * 8 (e.g. "1;")
* - fg color + ';' 9 (e.g. "38;5;2xx;")
* - fg color + ';' 9 (e.g. "48;5;2xx;")
* - terminating 'm' NUL 2
*
* The above overcounts attr (we only use 5 not 8) and one semicolon
* but it is close enough.
*/
#define COLOR_MAXLEN 40
/*
* IMPORTANT: Due to the way these color codes are emulated on Windows,
* write them only using printf(), fprintf(), and fputs(). In particular,
* do not use puts() or write().
*/
#define GIT_COLOR_NORMAL ""
#define GIT_COLOR_RESET "\033[m"
#define GIT_COLOR_BOLD "\033[1m"
#define GIT_COLOR_RED "\033[31m"
#define GIT_COLOR_GREEN "\033[32m"
#define GIT_COLOR_YELLOW "\033[33m"
#define GIT_COLOR_BLUE "\033[34m"
#define GIT_COLOR_MAGENTA "\033[35m"
#define GIT_COLOR_CYAN "\033[36m"
#define GIT_COLOR_BOLD_RED "\033[1;31m"
#define GIT_COLOR_BOLD_GREEN "\033[1;32m"
#define GIT_COLOR_BOLD_YELLOW "\033[1;33m"
#define GIT_COLOR_BOLD_BLUE "\033[1;34m"
#define GIT_COLOR_BOLD_MAGENTA "\033[1;35m"
#define GIT_COLOR_BOLD_CYAN "\033[1;36m"
#define GIT_COLOR_BG_RED "\033[41m"
#define GIT_COLOR_BG_GREEN "\033[42m"
#define GIT_COLOR_BG_YELLOW "\033[43m"
#define GIT_COLOR_BG_BLUE "\033[44m"
#define GIT_COLOR_BG_MAGENTA "\033[45m"
#define GIT_COLOR_BG_CYAN "\033[46m"
/* A special value meaning "no color selected" */
#define GIT_COLOR_NIL "NIL"
/*
* This variable stores the value of color.ui
*/
extern int git_use_color_default;
/*
* Use this instead of git_default_config if you need the value of color.ui.
*/
int git_color_default_config(const char *var, const char *value, void *cb);
int git_config_colorbool(const char *var, const char *value, int stdout_is_tty);
void color_parse(const char *value, const char *var, char *dst);
void color_parse_mem(const char *value, int len, const char *var, char *dst);
__attribute__((format (printf, 3, 4)))
int color_fprintf(FILE *fp, const char *color, const char *fmt, ...);
__attribute__((format (printf, 3, 4)))
int color_fprintf_ln(FILE *fp, const char *color, const char *fmt, ...);
int color_is_nil(const char *color);
#endif /* COLOR_H */