ui-diff: Add link to ignore/show whitespace changes in diffs

Add a link to the "Diffstat" line to ignore/show whitespace changes in the
generated diff.

To support this, cgit_commit_link() and cgit_diff_link() has learned to
preserve the ctx.qry.ignorews variable.

Signed-off-by: Johan Herland <johan@herland.net>

1 files changed, 5 insertions, 0 deletions

diff --git a/ui-diff.c b/ui-diff.c
index 1656b77..0dcabe9 100644
--- a/ui-diff.c
+++ b/ui-diff.c
@@ -171,6 +171,11 @@ void cgit_print_diffstat(const unsigned char *old_sha1,
         cgit_self_link("less", NULL, NULL, &ctx);
         ctx.qry.context = save_context;
         html(" context)");
+        html(" (");
+        ctx.qry.ignorews = (ctx.qry.ignorews + 1) % 2;
+        cgit_self_link(ctx.qry.ignorews ? "ignore" : "show", NULL, NULL, &ctx);
+        ctx.qry.ignorews = (ctx.qry.ignorews + 1) % 2;
+        html(" whitespace changes)");
         html("</div>");
         html("<table summary='diffstat' class='diffstat'>");
         max_changes = 0;