1 files changed, 30 insertions, 15 deletions
diff --git a/polygerrit-ui/app/elements/plugins/gr-event-helper/gr-event-helper.js b/polygerrit-ui/app/elements/plugins/gr-event-helper/gr-event-helper.js
index e750c07958..414abad6f6 100644
--- a/polygerrit-ui/app/elements/plugins/gr-event-helper/gr-event-helper.js
+++ b/polygerrit-ui/app/elements/plugins/gr-event-helper/gr-event-helper.js
@@ -1,16 +1,19 @@
-// Copyright (C) 2017 The Android Open Source Project
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-// http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
+/**
+ * @license
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 (function(window) {
   'use strict';
 
@@ -20,6 +23,17 @@
   }
 
   /**
+   * Add a callback to arbitrary event.
+   * The callback may return false to prevent event bubbling.
+   * @param {string} event Event name
+   * @param {function(Event):boolean} callback
+   * @return {function()} Unsubscribe function.
+   */
+  GrEventHelper.prototype.on = function(event, callback) {
+    return this._listen(this.element, callback, {event});
+  };
+
+  /**
    * Add a callback to element click or touch.
    * The callback may return false to prevent event bubbling.
    * @param {function(Event):boolean} callback
@@ -43,6 +57,7 @@
 
   GrEventHelper.prototype._listen = function(container, callback, opt_options) {
     const capture = opt_options && opt_options.capture;
+    const event = opt_options && opt_options.event || 'tap';
     const handler = e => {
       if (e.path.indexOf(this.element) !== -1) {
         let mayContinue = true;
@@ -58,9 +73,9 @@
         }
       }
     };
-    container.addEventListener('tap', handler, capture);
+    container.addEventListener(event, handler, capture);
     const unsubscribe = () =>
-      container.removeEventListener('tap', handler, capture);
+      container.removeEventListener(event, handler, capture);
     this._unsubscribers.push(unsubscribe);
     return unsubscribe;
   };