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-rw-r--r--ui-diff.c66
1 files changed, 65 insertions, 1 deletions
diff --git a/ui-diff.c b/ui-diff.c
index 6cfa697..ae4c9de 100644
--- a/ui-diff.c
+++ b/ui-diff.c
@@ -1,6 +1,10 @@
/* ui-diff.c: show diff between two blobs
*
* Copyright (C) 2006-2014 cgit Development Team <cgit@lists.zx2c4.com>
+ * Copyright (C) 2026 Saya Andy <saya.andy@posteo.com>
+ *
+ * Modified 2026 by Saya Andy:
+ * Select variable refs from web ui for diff
*
* Licensed under GNU General Public License v2
* (see COPYING for full license text)
@@ -336,6 +340,32 @@ static void filepair_cb(struct diff_filepair *pair)
cgit_ssdiff_footer();
}
+static int print_ref_option(const struct reference *ref, void *cb_data)
+{
+ const char **sel = (const char **)cb_data;
+
+ html_option(ref->name, ref->name, sel[0]);
+ return 0;
+}
+
+static void cgit_print_ref_select(const char *name, const char *selected)
+{
+ /*
+ * Offer every branch and tag so that any two refs can be compared.
+ */
+ html("<select name='");
+ html_attr(name);
+ html("' onchange='this.form.submit();'>");
+ refs_for_each_branch_ref(get_main_ref_store(the_repository),
+ print_ref_option, (void *)&selected);
+ if (ctx.repo->enable_remote_branches)
+ refs_for_each_remote_ref(get_main_ref_store(the_repository),
+ print_ref_option, (void *)&selected);
+ refs_for_each_tag_ref(get_main_ref_store(the_repository),
+ print_ref_option, (void *)&selected);
+ html("</select>");
+}
+
void cgit_print_diff_ctrls(void)
{
int i, curr;
@@ -343,9 +373,43 @@ void cgit_print_diff_ctrls(void)
html("<div class='cgit-panel'>");
html("<b>diff options</b>");
html("<form method='get'>");
- cgit_add_hidden_formfields(1, 0, ctx.qry.page);
+ /*
+ * Emit the same hidden fields as cgit_add_hidden_formfields(), except
+ * id/id2, which are carried by the ref-picker selects below.
+ */
+ if (!ctx.cfg.virtual_root) {
+ struct strbuf url = STRBUF_INIT;
+ strbuf_addf(&url, "%s/%s", ctx.qry.repo, ctx.qry.page);
+ if (ctx.qry.vpath)
+ strbuf_addf(&url, "/%s", ctx.qry.vpath);
+ html_hidden("url", url.buf);
+ strbuf_release(&url);
+ }
+ if (ctx.qry.head && ctx.repo->defbranch &&
+ strcmp(ctx.qry.head, ctx.repo->defbranch))
+ html_hidden("h", ctx.qry.head);
+ if (ctx.qry.showmsg)
+ html_hidden("showmsg", "1");
+
html("<table>");
html("<tr><td colspan='2'/></tr>");
+
+ /* ref pickers: compare any two refs (branches/tags) */
+ {
+ const char *new_ref = ctx.qry.oid ? ctx.qry.oid : ctx.qry.head;
+ const char *old_ref = ctx.qry.oid2;
+
+ html("<tr>");
+ html("<td class='label'>from:</td>");
+ html("<td class='ctrl'>");
+ cgit_print_ref_select("id2", old_ref);
+ html("</td></tr><tr>");
+ html("<td class='label'>to:</td>");
+ html("<td class='ctrl'>");
+ cgit_print_ref_select("id", new_ref);
+ html("</td></tr>");
+ }
+
html("<tr>");
html("<td class='label'>context:</td>");
html("<td class='ctrl'>");