ui-diff: make diffstat header a link to the full diff

When printing a path-filtered diff it wasn't obvious how to get back to
the full diff (clicking the 'diff' tab would do this). Making the diffstat
heading into a link seems to improve the usability.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/ui-diff.c b/ui-diff.c
index 7ab1e49..878496d 100644
--- a/ui-diff.c
+++ b/ui-diff.c
@@ -132,25 +132,28 @@ static void inspect_filepair(struct diff_filepair *pair)
 	items[files-1].removed = lines_removed;
 	if (lines_added + lines_removed > max_changes)
 		max_changes = lines_added + lines_removed;
 	total_adds += lines_added;
 	total_rems += lines_removed;
 }
 
 void cgit_print_diffstat(const unsigned char *old_sha1,
 			 const unsigned char *new_sha1)
 {
 	int i;
 
-	html("<div class='diffstat-header'>Diffstat</div>");
+	html("<div class='diffstat-header'>");
+	cgit_diff_link("Diffstat", NULL, NULL, ctx.qry.head, ctx.qry.sha1,
+		       ctx.qry.sha2, NULL);
+	html("</div>");
 	html("<table summary='diffstat' class='diffstat'>");
 	max_changes = 0;
 	cgit_diff_tree(old_sha1, new_sha1, inspect_filepair, NULL);
 	for(i = 0; i<files; i++)
 		print_fileinfo(&items[i]);
 	html("</table>");
 	html("<div class='diffstat-summary'>");
 	htmlf("%d files changed, %d insertions, %d deletions",
 	      files, total_adds, total_rems);
 	html("</div>");
 }