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-rw-r--r--Documentation/config.txt49
-rw-r--r--color.c35
-rw-r--r--color.h15
-rw-r--r--git-compat-util.h17
-rwxr-xr-xt/t4026-color.sh9
5 files changed, 86 insertions, 39 deletions
diff --git a/Documentation/config.txt b/Documentation/config.txt
index e208af1..db05dec 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -150,27 +150,34 @@ integer::
1024", "by 1024x1024", etc.
color::
- The value for a variables that takes a color is a list of
- colors (at most two) and attributes (at most one), separated
- by spaces. The colors accepted are `normal`, `black`,
- `red`, `green`, `yellow`, `blue`, `magenta`, `cyan` and
- `white`; the attributes are `bold`, `dim`, `ul`, `blink` and
- `reverse`. The first color given is the foreground; the
- second is the background. The position of the attribute, if
- any, doesn't matter. Attributes may be turned off specifically
- by prefixing them with `no` (e.g., `noreverse`, `noul`, etc).
-+
-Colors (foreground and background) may also be given as numbers between
-0 and 255; these use ANSI 256-color mode (but note that not all
-terminals may support this). If your terminal supports it, you may also
-specify 24-bit RGB values as hex, like `#ff0ab3`.
-+
-The attributes are meant to be reset at the beginning of each item
-in the colored output, so setting color.decorate.branch to `black`
-will paint that branch name in a plain `black`, even if the previous
-thing on the same output line (e.g. opening parenthesis before the
-list of branch names in `log --decorate` output) is set to be
-painted with `bold` or some other attribute.
+ The value for a variable that takes a color is a list of
+ colors (at most two, one for foreground and one for background)
+ and attributes (as many as you want), separated by spaces.
++
+The basic colors accepted are `normal`, `black`, `red`, `green`, `yellow`,
+`blue`, `magenta`, `cyan` and `white`. The first color given is the
+foreground; the second is the background.
++
+Colors may also be given as numbers between 0 and 255; these use ANSI
+256-color mode (but note that not all terminals may support this). If
+your terminal supports it, you may also specify 24-bit RGB values as
+hex, like `#ff0ab3`.
++
+The accepted attributes are `bold`, `dim`, `ul`, `blink`, `reverse`,
+`italic`, and `strike` (for crossed-out or "strikethrough" letters).
+The position of any attributes with respect to the colors
+(before, after, or in between), doesn't matter. Specific attributes may
+be turned off by prefixing them with `no` or `no-` (e.g., `noreverse`,
+`no-ul`, etc).
++
+For git's pre-defined color slots, the attributes are meant to be reset
+at the beginning of each item in the colored output. So setting
+`color.decorate.branch` to `black` will paint that branch name in a
+plain `black`, even if the previous thing on the same output line (e.g.
+opening parenthesis before the list of branch names in `log --decorate`
+output) is set to be painted with `bold` or some other attribute.
+However, custom log formats may do more complicated and layered
+coloring, and the negated forms may be useful there.
pathname::
A variable that takes a pathname value can be given a
diff --git a/color.c b/color.c
index 8f85153..81c2676 100644
--- a/color.c
+++ b/color.c
@@ -123,19 +123,34 @@ static int parse_color(struct color *out, const char *name, int len)
return -1;
}
-static int parse_attr(const char *name, int len)
+static int parse_attr(const char *name, size_t len)
{
- static const int attr_values[] = { 1, 2, 4, 5, 7,
- 22, 22, 24, 25, 27 };
- static const char * const attr_names[] = {
- "bold", "dim", "ul", "blink", "reverse",
- "nobold", "nodim", "noul", "noblink", "noreverse"
+ static const struct {
+ const char *name;
+ size_t len;
+ int val, neg;
+ } attrs[] = {
+#define ATTR(x, val, neg) { (x), sizeof(x)-1, (val), (neg) }
+ ATTR("bold", 1, 22),
+ ATTR("dim", 2, 22),
+ ATTR("italic", 3, 23),
+ ATTR("ul", 4, 24),
+ ATTR("blink", 5, 25),
+ ATTR("reverse", 7, 27),
+ ATTR("strike", 9, 29)
+#undef ATTR
};
+ int negate = 0;
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];
+
+ if (skip_prefix_mem(name, len, "no", &name, &len)) {
+ skip_prefix_mem(name, len, "-", &name, &len);
+ negate = 1;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(attrs); i++) {
+ if (attrs[i].len == len && !memcmp(attrs[i].name, name, len))
+ return negate ? attrs[i].neg : attrs[i].val;
}
return -1;
}
diff --git a/color.h b/color.h
index e155d13..6cae166 100644
--- a/color.h
+++ b/color.h
@@ -3,20 +3,23 @@
struct strbuf;
-/* 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 + ';' 3 * 10 (e.g. "1;")
+ * - attr + ';' 2 * num_attr (e.g. "1;")
+ * - no-attr + ';' 3 * num_attr (e.g. "22;")
* - fg color + ';' 17 (e.g. "38;2;255;255;255;")
* - bg color + ';' 17 (e.g. "48;2;255;255;255;")
* - terminating 'm' NUL 2
*
- * The above overcounts attr (we only use 5 not 8) and one semicolon
- * but it is close enough.
+ * The above overcounts by one semicolon but it is close enough.
+ *
+ * The space for attributes is also slightly overallocated, as
+ * the negation for some attributes is the same (e.g., nobold and nodim).
+ *
+ * We allocate space for 7 attributes.
*/
-#define COLOR_MAXLEN 70
+#define COLOR_MAXLEN 75
/*
* IMPORTANT: Due to the way these color codes are emulated on Windows,
diff --git a/git-compat-util.h b/git-compat-util.h
index 49d4029..c99cddc 100644
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -474,6 +474,23 @@ static inline int skip_prefix(const char *str, const char *prefix,
}
/*
+ * Like skip_prefix, but promises never to read past "len" bytes of the input
+ * buffer, and returns the remaining number of bytes in "out" via "outlen".
+ */
+static inline int skip_prefix_mem(const char *buf, size_t len,
+ const char *prefix,
+ const char **out, size_t *outlen)
+{
+ size_t prefix_len = strlen(prefix);
+ if (prefix_len <= len && !memcmp(buf, prefix, prefix_len)) {
+ *out = buf + prefix_len;
+ *outlen = len - prefix_len;
+ return 1;
+ }
+ return 0;
+}
+
+/*
* If buf ends with suffix, return 1 and subtract the length of the suffix
* from *len. Otherwise, return 0 and leave *len untouched.
*/
diff --git a/t/t4026-color.sh b/t/t4026-color.sh
index 2b32c4f..ec78c5e 100755
--- a/t/t4026-color.sh
+++ b/t/t4026-color.sh
@@ -50,14 +50,19 @@ test_expect_success 'attr negation' '
color "nobold nodim noul noblink noreverse" "[22;24;25;27m"
'
+test_expect_success '"no-" variant of negation' '
+ color "no-bold no-blink" "[22;25m"
+'
+
test_expect_success 'long color specification' '
color "254 255 bold dim ul blink reverse" "[1;2;4;5;7;38;5;254;48;5;255m"
'
test_expect_success 'absurdly long color specification' '
color \
- "#ffffff #ffffff bold nobold dim nodim ul noul blink noblink reverse noreverse" \
- "[1;2;4;5;7;22;24;25;27;38;2;255;255;255;48;2;255;255;255m"
+ "#ffffff #ffffff bold nobold dim nodim italic noitalic
+ ul noul blink noblink reverse noreverse strike nostrike" \
+ "[1;2;3;4;5;7;9;22;23;24;25;27;29;38;2;255;255;255;48;2;255;255;255m"
'
test_expect_success '0-7 are aliases for basic ANSI color names' '