1 files changed, 47 insertions, 0 deletions
diff --git a/core/modules/menu/menu.admin.js b/core/modules/menu/menu.admin.js
new file mode 100644
index 00000000000..15bc2e7c790
--- /dev/null
+++ b/core/modules/menu/menu.admin.js
@@ -0,0 +1,47 @@
+
+(function ($) {
+
+  Drupal.behaviors.menuChangeParentItems = {
+    attach: function (context, settings) {
+      $('fieldset#edit-menu input').each(function () {
+        $(this).change(function () {
+          // Update list of available parent menu items.
+          Drupal.menu_update_parent_list();
+        });
+      });
+    }
+  }
+
+  /**
+   * Function to set the options of the menu parent item dropdown.
+   */
+  Drupal.menu_update_parent_list = function () {
+    var values = [];
+
+    $('input:checked', $('fieldset#edit-menu')).each(function () {
+      // Get the names of all checked menus.
+      values.push(Drupal.checkPlain($.trim($(this).val())));
+    });
+
+    var url = Drupal.settings.basePath + 'admin/structure/menu/parents';
+    $.ajax({
+      url: location.protocol + '//' + location.host + url,
+      type: 'POST',
+      data: {'menus[]' : values},
+      dataType: 'json',
+      success: function (options) {
+        // Save key of last selected element.
+        var selected = $('fieldset#edit-menu #edit-menu-parent :selected').val();
+        // Remove all exisiting options from dropdown.
+        $('fieldset#edit-menu #edit-menu-parent').children().remove();
+        // Add new options to dropdown.
+        jQuery.each(options, function(index, value) {
+          $('fieldset#edit-menu #edit-menu-parent').append(
+            $('<option ' + (index == selected ? ' selected="selected"' : '') + '></option>').val(index).text(value)
+          );
+        });
+      }
+    });
+  }
+
+})(jQuery);