From 88c13e9f2694db2d91f0f76f0d485395921135e2 Mon Sep 17 00:00:00 2001
From: Byron Jones <bjones@mozilla.com>
Date: Tue, 7 Aug 2012 12:53:31 +0800
Subject: Bug 779434: Fix refreshing a page not updating fields

---
 js/show_bug.js | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 js/show_bug.js

(limited to 'js')

diff --git a/js/show_bug.js b/js/show_bug.js
new file mode 100644
index 000000000..c762f9e54
--- /dev/null
+++ b/js/show_bug.js
@@ -0,0 +1,39 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This Source Code Form is "Incompatible With Secondary Licenses", as
+ * defined by the Mozilla Public License, v. 2.0. */
+
+function getPreSelectedIndex(el) {
+    var options = el.options;
+    for (var i = 0, l = options.length; i < l; i++) {
+        var attributes = options[i].attributes;
+        for (var j = 0, m = attributes.length; j < m; j++) {
+            if (attributes[j].name == 'selected') {
+                return i;
+            }
+        }
+    }
+    return 0;
+}
+
+// Force the browser to honour the selected option when a page is refreshed,
+// but if the user hasn't explicitly selected a different option.
+YAHOO.util.Event.onDOMReady(function() {
+    var selects = document.getElementById('changeform').getElementsByTagName('select');
+    for (var i = 0, l = selects.length; i < l; i++) {
+        var el = selects[i];
+        var el_dirty = document.getElementById(el.name + '_dirty');
+        if (el_dirty) {
+            if (!el_dirty.value) {
+                el.selectedIndex = getPreSelectedIndex(el);
+            }
+            YAHOO.util.Event.on(el, "change", function(e) {
+                var el = e.target;
+                var preSelectedIndex = getPreSelectedIndex(el);
+                document.getElementById(el.name + '_dirty').value = preSelectedIndex == el.selectedIndex ? '' : '1';
+            });
+        }
+    }
+});
-- 
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