colorize: style chunk function name

It's nice to use a different style for the chunk's function name to make
it clear that the name is not necessarily adjacent to the chunk's actual
lines.

Signed-off-by: Jason Cox <me@jasoncarloscox.com>
Acked-by: Robin Jarry <robin@jarry.cc>

4 files changed, 13 insertions, 2 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0404164f..b293b869 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ## [Unreleased](https://git.sr.ht/~rjarry/aerc/log/master)
 
+### Added
+
+- Colorize can style diff chunk function names with `diff_chunk_func`.
+
 ## [0.15.2](https://git.sr.ht/~rjarry/aerc/refs/0.15.2) - 2023-05-11
 
 ### Fixed
diff --git a/doc/aerc-stylesets.7.scd b/doc/aerc-stylesets.7.scd
index 218813fe..12aa97b6 100644
--- a/doc/aerc-stylesets.7.scd
+++ b/doc/aerc-stylesets.7.scd
@@ -151,6 +151,8 @@ declared under a *[viewer]* section of the styleset file.
 :  Patch diff meta lines.
 |  *diff_chunk*
 :  Patch diff chunks.
+|  *diff_chunk_func*
+:  Patch diff chunk function names.
 |  *diff_add*
 :  Patch diff added lines.
 |  *diff_del*
diff --git a/filters/colorize.c b/filters/colorize.c
index 1c979d11..6f988158 100644
--- a/filters/colorize.c
+++ b/filters/colorize.c
@@ -144,6 +144,7 @@ struct styles {
 	struct style signature;
 	struct style diff_meta;
 	struct style diff_chunk;
+	struct style diff_chunk_func;
 	struct style diff_add;
 	struct style diff_del;
 	struct style quote_1;
@@ -160,7 +161,8 @@ static struct styles styles = {
 	.header = { .bold = true, .fg = { .type = RGB, .rgb = 0xaf87ff } },
 	.signature = { .dim = true, .fg = { .type = RGB, .rgb = 0xaf87ff } },
 	.diff_meta = { .bold = true, .fg = { .type = RGB, .rgb = 0xffffff } },
-	.diff_chunk = { .fg = { .type = RGB, .rgb = 0x00cdcd } },
+	.diff_chunk = { .bold = true, .fg = { .type = RGB, .rgb = 0x00cdcd } },
+	.diff_chunk_func = { .fg = { .type = RGB, .rgb = 0x00cdcd } },
 	.diff_add = { .fg = { .type = RGB, .rgb = 0x00cd00 } },
 	.diff_del = { .fg = { .type = RGB, .rgb = 0xcd0000 } },
 	.quote_1 = { .fg = { .type = RGB, .rgb = 0x5fafff } },
@@ -322,6 +324,7 @@ static struct {const char *n; struct style *s;} ini_objects[] = {
 	{"signature", &styles.signature},
 	{"diff_meta", &styles.diff_meta},
 	{"diff_chunk", &styles.diff_chunk},
+	{"diff_chunk_func", &styles.diff_chunk_func},
 	{"diff_add", &styles.diff_add},
 	{"diff_del", &styles.diff_del},
 	{"quote_1", &styles.quote_1},
@@ -441,7 +444,9 @@ static void diff_chunk(const char *in)
 		len++;
 	in += print_notabs(in, len);
 	print(RESET);
+	print(seq(&styles.diff_chunk_func));
 	print_notabs(in, BUFSIZ);
+	print(RESET);
 }
 
 static inline bool isurichar(char c)
diff --git a/filters/vectors/colorize-patch.expected b/filters/vectors/colorize-patch.expected
index e9124672..733f7628 100644
--- a/filters/vectors/colorize-patch.expected
+++ b/filters/vectors/colorize-patch.expected
@@ -14,7 +14,7 @@ According to scdoc(5), numbered lists start with a period.
 index d82ba7cf8163..34bbf4af0fc5 100644
 --- a/doc/aerc-stylesets.7.scd
 +++ b/doc/aerc-stylesets.7.scd
-@@ -180,20 +180,20 @@ that style applies, unless overridden by a higher layer.
+@@ -180,20 +180,20 @@ that style applies, unless overridden by a higher layer.
  
  The order that *msglist_\** styles are applied in is, from first to last: