Currently, the graph code is hardcoded to use ANSI color escapes for
coloring the column characters in the generated graphs. This patch
allows a custom scheme of colors to be set at runtime, allowing
different types of color escapes to be used.
A new function - graph_set_column_colors() - is added to the graph.h API,
which allows a custom column_colors array (and column_colors_max value)
to replace the builtin ANSI array (and _max value). The new function -
if used - must be called before graph_init() is called.
Signed-off-by: Johan Herland <johan@xxxxxxxxxxx>
---
graph.c | 37 ++++++++++++++++++++++++++-----------
graph.h | 17 +++++++++++++++++
2 files changed, 43 insertions(+), 11 deletions(-)
diff --git a/graph.c b/graph.c
index 47397da..e2a5860 100644
--- a/graph.c
+++ b/graph.c
@@ -62,7 +62,7 @@ enum graph_state {
/*
* The list of available column colors.
*/
-static char column_colors[][COLOR_MAXLEN] = {
+static const char *column_colors_ansi[] = {
GIT_COLOR_RED,
GIT_COLOR_GREEN,
GIT_COLOR_YELLOW,
@@ -75,23 +75,33 @@ static char column_colors[][COLOR_MAXLEN] = {
GIT_COLOR_BOLD_BLUE,
GIT_COLOR_BOLD_MAGENTA,
GIT_COLOR_BOLD_CYAN,
+ GIT_COLOR_RESET,
};
-#define COLUMN_COLORS_MAX (ARRAY_SIZE(column_colors))
+#define COLUMN_COLORS_ANSI_MAX (ARRAY_SIZE(column_colors_ansi) - 1)
-static const char *column_get_color_code(const struct column *c)
+static const char **column_colors;
+static unsigned short column_colors_max;
+
+void graph_set_column_colors(const char **colors, unsigned short colors_max)
+{
+ column_colors = colors;
+ column_colors_max = colors_max;
+}
+
+static const char *column_get_color_code(unsigned short color)
{
- return column_colors[c->color];
+ return column_colors[color];
}
static void strbuf_write_column(struct strbuf *sb, const struct column *c,
char col_char)
{
- if (c->color < COLUMN_COLORS_MAX)
- strbuf_addstr(sb, column_get_color_code(c));
+ if (c->color < column_colors_max)
+ strbuf_addstr(sb, column_get_color_code(c->color));
strbuf_addch(sb, col_char);
- if (c->color < COLUMN_COLORS_MAX)
- strbuf_addstr(sb, GIT_COLOR_RESET);
+ if (c->color < column_colors_max)
+ strbuf_addstr(sb, column_get_color_code(column_colors_max));
}
struct git_graph {
@@ -215,6 +225,11 @@ static struct strbuf *diff_output_prefix_callback(struct diff_options *opt, void
struct git_graph *graph_init(struct rev_info *opt)
{
struct git_graph *graph = xmalloc(sizeof(struct git_graph));
+
+ if (!column_colors)
+ graph_set_column_colors(column_colors_ansi,
+ COLUMN_COLORS_ANSI_MAX);
+
graph->commit = NULL;
graph->revs = opt;
graph->num_parents = 0;
@@ -231,7 +246,7 @@ struct git_graph *graph_init(struct rev_info *opt)
* always increment it for the first commit we output.
* This way we start at 0 for the first commit.
*/
- graph->default_column_color = COLUMN_COLORS_MAX - 1;
+ graph->default_column_color = column_colors_max - 1;
/*
* Allocate a reasonably large default number of columns
@@ -354,7 +369,7 @@ static struct commit_list *first_interesting_parent(struct git_graph *graph)
static unsigned short graph_get_current_column_color(const struct git_graph *graph)
{
if (!DIFF_OPT_TST(&graph->revs->diffopt, COLOR_DIFF))
- return COLUMN_COLORS_MAX;
+ return column_colors_max;
return graph->default_column_color;
}
@@ -364,7 +379,7 @@ static unsigned short graph_get_current_column_color(const struct git_graph *gra
static void graph_increment_column_color(struct git_graph *graph)
{
graph->default_column_color = (graph->default_column_color + 1) %
- COLUMN_COLORS_MAX;
+ column_colors_max;
}
static unsigned short graph_find_commit_color(const struct git_graph *graph,
diff --git a/graph.h b/graph.h
index f188168..aff960c 100644
--- a/graph.h
+++ b/graph.h
@@ -5,6 +5,23 @@
struct git_graph;
/*
+ * Set up a custom scheme for column colors.
+ *
+ * The default column color scheme inserts ANSI color escapes to colorize
+ * the graph. The various color escapes are stored in an array of strings
+ * where each entry corresponds to a color, except for the last entry,
+ * which denotes the escape for resetting the color back to the default.
+ * When generating the graph, strings from this array are inserted before
+ * and after the various column characters.
+ *
+ * This function allows you to enable a custom array of color escapes.
+ * The 'colors_max' argument is the index of the last "reset" entry.
+ *
+ * This functions must be called BEFORE graph_init() is called.
+ */
+void graph_set_column_colors(const char **colors, unsigned short colors_max);
+
+/*
* Create a new struct git_graph.
*/
struct git_graph *graph_init(struct rev_info *opt);
--
1.7.0.4
--
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