[tig] [PATCH 3/3] log: Colour the diff stat

[Kumar Appaiah <a.kumar@alumni.iitm.ac.in>]

This commit adds custom log_read and log_draw functions that utilize
the diff stat drawing functions from the diff module. The absence of
the triple hyphen separator prevents direct usage of the diff drawing
functions directly.

Signed-Off-By: Kumar Appaiah <a.kumar@alumni.iitm.ac.in>
---
 src/log.c | 62 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 60 insertions(+), 2 deletions(-)

diff --git a/src/log.c b/src/log.c
index eef61dc..e6f2a82 100644
--- a/src/log.c
+++ b/src/log.c
@@ -23,6 +23,9 @@ struct log_state {
 	 * up/down in the log view. */
 	int last_lineno;
 	enum line_type last_type;
+	bool commit_title_read;
+	bool after_commit_header;
+	bool reading_diff_stat;
 };
 
 static void
@@ -76,14 +79,69 @@ log_request(struct view *view, enum request request, struct line *line)
 	}
 }
 
+static bool
+log_read(struct view *view, char *data)
+{
+	enum line_type type;
+	struct log_state *state = view->private;
+	size_t len;
+
+	if (!data)
+		return TRUE;
+
+	type = get_line_type(data);
+
+	len = strlen(data);
+
+	if (type == LINE_COMMIT)
+		state->commit_title_read = TRUE;
+	else if (state->commit_title_read && len < 1) {
+		state->commit_title_read = FALSE;
+		state->after_commit_header = TRUE;
+	} else if (state->after_commit_header && len < 1) {
+		state->after_commit_header = FALSE;
+		state->reading_diff_stat = TRUE;
+	} else if (state->reading_diff_stat) {
+		bool ret = diff_common_add_diff_stat(view, data);
+		if (ret) {
+			return TRUE;
+		} else {
+			state->reading_diff_stat = FALSE;
+		}
+	}
+
+	return pager_common_read(view, data, type);
+}
+
+static bool
+log_draw(struct view *view, struct line *line, unsigned int lineno)
+{
+	char *text = line->data;
+	enum line_type type = line->type;
+
+	if (draw_lineno(view, lineno))
+		return TRUE;
+
+	if (line->wrapped && draw_text(view, LINE_DELIMITER, "+"))
+		return TRUE;
+
+	if (type == LINE_DIFF_STAT) {
+		diff_common_draw_diff_stat(view, &type, &text);
+		draw_text(view, type, text);
+		return TRUE;
+	}
+
+	return pager_draw(view, line, lineno);
+}
+
 static struct view_ops log_ops = {
 	"line",
 	argv_env.head,
 	VIEW_ADD_PAGER_REFS | VIEW_OPEN_DIFF | VIEW_SEND_CHILD_ENTER | VIEW_LOG_LIKE | VIEW_REFRESH,
 	sizeof(struct log_state),
 	log_open,
-	pager_read,
-	pager_draw,
+	log_read,
+	log_draw,
 	log_request,
 	pager_grep,
 	log_select,
-- 
1.9.1