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diff: Support both attributes and colors

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Make it possible to set both colors and a attribute for diff colors.
Background colors are supported too.

Syntax is now:

	[attr] [fg [bg]]
	[fg [bg]] [attr]

Empty value is same as "normal normal", ie use default colors.  The new
syntax is backwards compatible.

Signed-off-by: Timo Hirvonen <tihirvon@gmail.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Timo Hirvonen 2006-07-13 19:06:12 +03:00 committed by Junio C Hamano
parent ff4d78041e
commit f37399e6b0
1 changed files with 106 additions and 56 deletions
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162
diff.c
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@ -26,30 +26,14 @@ enum color_diff {
DIFF_FILE_NEW = 5,
};
#define COLOR_NORMAL ""
#define COLOR_BOLD "\033[1m"
#define COLOR_DIM "\033[2m"
#define COLOR_UL "\033[4m"
#define COLOR_BLINK "\033[5m"
#define COLOR_REVERSE "\033[7m"
#define COLOR_RESET "\033[m"
#define COLOR_BLACK "\033[30m"
#define COLOR_RED "\033[31m"
#define COLOR_GREEN "\033[32m"
#define COLOR_YELLOW "\033[33m"
#define COLOR_BLUE "\033[34m"
#define COLOR_MAGENTA "\033[35m"
#define COLOR_CYAN "\033[36m"
#define COLOR_WHITE "\033[37m"
static const char *diff_colors[] = {
COLOR_RESET,
COLOR_NORMAL,
COLOR_BOLD,
COLOR_CYAN,
COLOR_RED,
COLOR_GREEN
/* "\033[1;30;47m\0" is 11 bytes */
static char diff_colors[][16] = {
"\033[m", /* reset */
"", /* normal */
"\033[1m", /* bold */
"\033[36m", /* cyan */
"\033[31m", /* red */
"\033[32m" /* green */
};
static int parse_diff_color_slot(const char *var, int ofs)
@ -67,38 +51,104 @@ static int parse_diff_color_slot(const char *var, int ofs)
die("bad config variable '%s'", var);
}
static const char *parse_diff_color_value(const char *value, const char *var)
static int parse_color(const char *name, int len)
{
if (!strcasecmp(value, "normal"))
return COLOR_NORMAL;
if (!strcasecmp(value, "bold"))
return COLOR_BOLD;
if (!strcasecmp(value, "dim"))
return COLOR_DIM;
if (!strcasecmp(value, "ul"))
return COLOR_UL;
if (!strcasecmp(value, "blink"))
return COLOR_BLINK;
if (!strcasecmp(value, "reverse"))
return COLOR_REVERSE;
if (!strcasecmp(value, "reset"))
return COLOR_RESET;
if (!strcasecmp(value, "black"))
return COLOR_BLACK;
if (!strcasecmp(value, "red"))
return COLOR_RED;
if (!strcasecmp(value, "green"))
return COLOR_GREEN;
if (!strcasecmp(value, "yellow"))
return COLOR_YELLOW;
if (!strcasecmp(value, "blue"))
return COLOR_BLUE;
if (!strcasecmp(value, "magenta"))
return COLOR_MAGENTA;
if (!strcasecmp(value, "cyan"))
return COLOR_CYAN;
if (!strcasecmp(value, "white"))
return COLOR_WHITE;
static const char * const color_names[] = {
"normal", "black", "red", "green", "yellow",
"blue", "magenta", "cyan", "white"
};
int i;
for (i = 0; i < ARRAY_SIZE(color_names); i++) {
const char *str = color_names[i];
if (!strncasecmp(name, str, len) && !str[len])
return i - 1;
}
return -2;
}
static int parse_attr(const char *name, int len)
{
static const int attr_values[] = { 1, 2, 4, 5, 7 };
static const char * const attr_names[] = {
"bold", "dim", "ul", "blink", "reverse"
};
int i;
for (i = 0; i < ARRAY_SIZE(attr_names); i++) {
const char *str = attr_names[i];
if (!strncasecmp(name, str, len) && !str[len])
return attr_values[i];
}
return -1;
}
static void parse_diff_color_value(const char *value, const char *var, char *dst)
{
const char *ptr = value;
int attr = -1;
int fg = -2;
int bg = -2;
if (!strcasecmp(value, "reset")) {
strcpy(dst, "\033[m");
return;
}
/* [fg [bg]] [attr] */
while (*ptr) {
const char *word = ptr;
int val, len = 0;
while (word[len] && !isspace(word[len]))
len++;
ptr = word + len;
while (*ptr && isspace(*ptr))
ptr++;
val = parse_color(word, len);
if (val >= -1) {
if (fg == -2) {
fg = val;
continue;
}
if (bg == -2) {
bg = val;
continue;
}
goto bad;
}
val = parse_attr(word, len);
if (val < 0 || attr != -1)
goto bad;
attr = val;
}
if (attr >= 0 || fg >= 0 || bg >= 0) {
int sep = 0;
*dst++ = '\033';
*dst++ = '[';
if (attr >= 0) {
*dst++ = '0' + attr;
sep++;
}
if (fg >= 0) {
if (sep++)
*dst++ = ';';
*dst++ = '3';
*dst++ = '0' + fg;
}
if (bg >= 0) {
if (sep++)
*dst++ = ';';
*dst++ = '4';
*dst++ = '0' + bg;
}
*dst++ = 'm';
}
*dst = 0;
return;
bad:
die("bad config value '%s' for variable '%s'", value, var);
}
@ -145,7 +195,7 @@ int git_diff_ui_config(const char *var, const char *value)
}
if (!strncmp(var, "diff.color.", 11)) {
int slot = parse_diff_color_slot(var, 11);
diff_colors[slot] = parse_diff_color_value(value, var);
parse_diff_color_value(value, var, diff_colors[slot]);
return 0;
}
return git_default_config(var, value);