Display active media players on chrome://media-internals.

chrome/browser/resources/media_internals/event_list.js

+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+cr.define('media', function() {
+
+  /**
+   * This class holds a list of MediaLogEvents.
+   * It exposes an <li> element that contains a tabular list of said events,
+   * the time at which they occurred, and their parameters.
+   */
+  function EventList() {
+    this.table_ = document.createElement('table');
+    this.li = createDetailsLi();
+    this.li.details.appendChild(this.table_);
+    this.li.summary.textContent = 'Log:';
+
+    this.startTime_ = null;
+
+    var hrow = document.createElement('tr');

[arv (Not doing code reviews), 2011/08/16 19:29:03]

hRow

[Scott Franklin, 2011/08/16 23:33:52]

Done.

+    hrow.appendChild(makeElement('th', 'Time:'));
+    hrow.appendChild(makeElement('th', 'Event:'));
+    hrow.appendChild(makeElement('th', 'Parameters:'));
+    var header = document.createElement('thead');
+    header.appendChild(hrow);
+    this.table_.appendChild(header);
+  };
+
+  EventList.prototype = {
+
+    /**
+     * Add an event to the list. It is stored as a new row in this.table_.
+     * @param {Object} event The MediaLogEvent that has occurred.
+     */
+    addEvent: function(event) {
+      this.startTime_ = this.startTime_ || event.time;
+      event.time -= this.startTime_;
+
+      var row = document.createElement('tr');
+      row.appendChild(makeElement('td', media.round(event.time)));
+      row.appendChild(makeElement('td', event.type));
+      params = [];

[arv (Not doing code reviews), 2011/08/16 19:29:03]

missing var

[Scott Franklin, 2011/08/16 23:33:52]

Done.

+      for (var p in event.params)
+        params.push(p + ': ' + event.params[p]);
+      row.appendChild(makeElement('td', params.join(', ')));
+      this.table_.appendChild(row);
+    },

[scherkus (not reviewing), 2011/08/16 19:18:29]

trailing , ?

[Scott Franklin, 2011/08/16 23:33:52]

Done.

+  };
+
+  return {
+    EventList: EventList,

[scherkus (not reviewing), 2011/08/16 19:18:29]

trailing , ?

[Scott Franklin, 2011/08/16 23:33:52]

Done.

+  };
+});