[PATCH 2/2] color: support "italic" attribute

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We already support bold, underline, and similar attributes.
Let's add italic to the mix.  According to the Wikipedia
page on ANSI colors, this attribute is "not widely
supported", but it does seem to work on my xterm.

We don't have to bump the maximum color size because we were
already over-allocating it (but we do adjust the comment
appropriately).

Requested-by: Simon Courtois <scourtois@xxxxxxxx>
Signed-off-by: Jeff King <peff@xxxxxxxx>
---
 Documentation/config.txt | 2 +-
 color.c                  | 8 ++++----
 color.h                  | 3 ++-
 t/t4026-color.sh         | 4 ++--
 4 files changed, 9 insertions(+), 8 deletions(-)

diff --git a/Documentation/config.txt b/Documentation/config.txt
index 58673cf..4b97d8d 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -154,7 +154,7 @@ color::
        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
+       `white`; the attributes are `bold`, `dim`, `italic`, `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
diff --git a/color.c b/color.c
index 8f85153..698682c 100644
--- a/color.c
+++ b/color.c
@@ -125,11 +125,11 @@ static int parse_color(struct color *out, const char *name, int len)
 
 static int parse_attr(const char *name, int len)
 {
-	static const int attr_values[] = { 1, 2, 4, 5, 7,
-					   22, 22, 24, 25, 27 };
+	static const int attr_values[] = { 1, 2, 3, 4, 5, 7,
+					   22, 22, 23, 24, 25, 27 };
 	static const char * const attr_names[] = {
-		"bold", "dim", "ul", "blink", "reverse",
-		"nobold", "nodim", "noul", "noblink", "noreverse"
+		"bold", "dim", "italic", "ul", "blink", "reverse",
+		"nobold", "nodim", "noitalic", "noul", "noblink", "noreverse"
 	};
 	int i;
 	for (i = 0; i < ARRAY_SIZE(attr_names); i++) {
diff --git a/color.h b/color.h
index e24fa0b..3af01a6 100644
--- a/color.h
+++ b/color.h
@@ -16,7 +16,8 @@ struct strbuf;
  *
  * The space for attributes is also slightly overallocated, as
  * the negation for some attributes is the same (e.g., nobold and nodim).
- * We also allocate space for 6 attributes (even though we have only 5).
+ *
+ * We allocate space for 6 attributes.
  */
 #define COLOR_MAXLEN 70
 
diff --git a/t/t4026-color.sh b/t/t4026-color.sh
index 2b32c4f..05625c5 100755
--- a/t/t4026-color.sh
+++ b/t/t4026-color.sh
@@ -56,8 +56,8 @@ test_expect_success 'long color specification' '
 
 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" \
+	  "[1;2;3;4;5;7;22;23;24;25;27;38;2;255;255;255;48;2;255;255;255m"
 '
 
 test_expect_success '0-7 are aliases for basic ANSI color names' '
-- 
2.9.0.209.g845fbc1
--
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