| # Copyright 2013 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. |
| |
| """A Telemetry page_action that loops media playback. |
| |
| Action parameters are: |
| - loop_count: The number of times to loop media. |
| - selector: If no selector is defined then the action attempts to loop the first |
| media element on the page. If 'all' then loop all media elements. |
| - timeout_in_seconds: Timeout to wait for media to loop. Default is |
| 60 sec x loop_count. 0 means do not wait. |
| """ |
| |
| from telemetry.core import exceptions |
| from telemetry.internal.actions import media_action |
| from telemetry.internal.actions import page_action |
| from telemetry.internal.actions import utils |
| |
| |
| class LoopAction(media_action.MediaAction): |
| def __init__(self, loop_count, selector=None, timeout_in_seconds=None): |
| super(LoopAction, self).__init__() |
| self._loop_count = loop_count |
| self._selector = selector if selector else '' |
| self._timeout_in_seconds = ( |
| timeout_in_seconds if timeout_in_seconds else 60 * loop_count) |
| |
| def WillRunAction(self, tab): |
| """Load the media metrics JS code prior to running the action.""" |
| super(LoopAction, self).WillRunAction(tab) |
| utils.InjectJavaScript(tab, 'loop.js') |
| |
| def RunAction(self, tab): |
| try: |
| tab.ExecuteJavaScript( |
| 'window.__loopMedia({{ selector }}, {{ loop_count }});', |
| selector=self._selector, loop_count=self._loop_count) |
| if self._timeout_in_seconds > 0: |
| self.WaitForEvent(tab, self._selector, 'loop', self._timeout_in_seconds) |
| except exceptions.EvaluateException: |
| raise page_action.PageActionFailed('Cannot loop media element(s) with ' |
| 'selector = %s.' % self._selector) |
