blob: d4763d3a4daffee0f8f517e3726a5f096d82eff9 [file] [log] [blame]
# 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.
"""Common media action functions."""
from telemetry.internal.actions import page_action
from telemetry.internal.actions import utils
import py_utils
class MediaAction(page_action.PageAction):
def WillRunAction(self, tab):
"""Loads the common media action JS code prior to running the action."""
utils.InjectJavaScript(tab, 'media_action.js')
def RunAction(self, tab):
super(MediaAction, self).RunAction(tab)
def WaitForEvent(self, tab, selector, event_name, timeout_in_seconds):
"""Halts media action until the selector's event is fired.
Args:
tab: The tab to check for event on.
selector: Media element selector.
event_name: Name of the event to check if fired or not.
timeout_in_seconds: Timeout to check for event, throws an exception if
not fired.
"""
py_utils.WaitFor(
lambda: self.HasEventCompletedOrError(tab, selector, event_name),
timeout=timeout_in_seconds)
def HasEventCompletedOrError(self, tab, selector, event_name):
if tab.EvaluateJavaScript(
'window.__hasEventCompleted({{ selector }}, {{ event_name }});',
selector=selector, event_name=event_name):
return True
error = tab.EvaluateJavaScript('window.__error')
if error:
raise page_action.PageActionFailed(
'Detected media error while waiting for %s: %s' % (event_name, error))
return False