src/tools/telemetry/telemetry/page/actions/tap.py

   1 # Copyright 2013 The Chromium Authors. All rights reserved.
   2 # Use of this source code is governed by a BSD-style license that can be
   3 # found in the LICENSE file.
   4 import os
   5
   6 from telemetry.page.actions import gesture_action
   7 from telemetry.page.actions import page_action
   8
   9 class TapAction(gesture_action.GestureAction):
  10   def __init__(self, attributes=None):
  11     super(TapAction, self).__init__(attributes)
  12     self._SetTimelineMarkerBaseName('TapAction::RunAction')
  13
  14   def WillRunAction(self, page, tab):
  15     for js_file in ['gesture_common.js', 'tap.js']:
  16       with open(os.path.join(os.path.dirname(__file__), js_file)) as f:
  17         js = f.read()
  18         tab.ExecuteJavaScript(js)
  19
  20     # Fail if browser doesn't support synthetic tap gestures.
  21     if not tab.EvaluateJavaScript('window.__TapAction_SupportedByBrowser()'):
  22       raise page_action.PageActionNotSupported(
  23           'Synthetic tap not supported for this browser')
  24
  25     done_callback = 'function() { window.__tapActionDone = true; }'
  26     tab.ExecuteJavaScript("""
  27         window.__tapActionDone = false;
  28         window.__tapAction = new __TapAction(%s);"""
  29         % (done_callback))
  30
  31   def RunGesture(self, page, tab, previous_action):
  32     left_position_percentage = 0.5
  33     top_position_percentage = 0.5
  34     duration_ms = 0
  35     if hasattr(self, 'left_position_percentage'):
  36       left_position_percentage = self.left_position_percentage
  37     if hasattr(self, 'top_position_percentage'):
  38       top_position_percentage = self.top_position_percentage
  39     if hasattr(self, 'duration_ms'):
  40       duration_ms = self.duration_ms
  41     if hasattr(self, 'element_function'):
  42       tab.ExecuteJavaScript("""
  43           (%s)(function(element) { window.__tapAction.start(
  44              { element: element,
  45                left_position_percentage: %s,
  46                top_position_percentage: %s,
  47                duration_ms: %s })
  48              });""" % (self.element_function,
  49                        left_position_percentage,
  50                        top_position_percentage,
  51                        duration_ms))
  52     else:
  53       tab.ExecuteJavaScript("""
  54           window.__tapAction.start(
  55           { element: document.body,
  56             left_position_percentage: %s,
  57             top_position_percentage: %s,
  58             duration_ms: %s });"""
  59         % (left_position_percentage,
  60            top_position_percentage,
  61            duration_ms))
  62
  63     tab.WaitForJavaScriptExpression('window.__tapActionDone', 60)
  64
  65   def CanBeBound(self):
  66     return True
  67
  68   def BindMeasurementJavaScript(self, tab, start_js, stop_js):
  69     # Make the tap action start and stop measurement automatically.
  70     tab.ExecuteJavaScript("""
  71         window.__tapAction.beginMeasuringHook = function() { %s };
  72         window.__tapAction.endMeasuringHook = function() { %s };
  73     """ % (start_js, stop_js))