src/tools/telemetry/telemetry/page/actions/pinch.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 page_action
   7
   8 class PinchAction(page_action.PageAction):
   9   def __init__(self, attributes=None):
  10     super(PinchAction, self).__init__(attributes)
  11
  12   def WillRunAction(self, page, tab):
  13     for js_file in ['gesture_common.js', 'pinch.js']:
  14       with open(os.path.join(os.path.dirname(__file__), js_file)) as f:
  15         js = f.read()
  16         tab.ExecuteJavaScript(js)
  17
  18     # Fail if browser doesn't support synthetic pinch gestures.
  19     if not tab.EvaluateJavaScript('window.__PinchAction_SupportedByBrowser()'):
  20       raise page_action.PageActionNotSupported(
  21           'Synthetic pinch not supported for this browser')
  22
  23     done_callback = 'function() { window.__pinchActionDone = true; }'
  24     tab.ExecuteJavaScript("""
  25         window.__pinchActionDone = false;
  26         window.__pinchAction = new __PinchAction(%s);"""
  27         % done_callback)
  28
  29   def RunAction(self, page, tab, previous_action):
  30     zoom_in = True
  31     if hasattr(self, 'zoom_in'):
  32       zoom_in = self.zoom_in
  33
  34     pixels_to_move = 4000
  35     if hasattr(self, 'pixels_to_move'):
  36       pixels_to_move = self.pixels_to_move
  37
  38     tab.ExecuteJavaScript('window.__pinchAction.start(%s, %f)'
  39                           % ("true" if zoom_in else "false", pixels_to_move))
  40
  41     tab.WaitForJavaScriptExpression('window.__pinchActionDone', 60)
  42
  43   def CanBeBound(self):
  44     return True
  45
  46   def CustomizeBrowserOptions(self, options):
  47     options.AppendExtraBrowserArgs('--enable-gpu-benchmarking')
  48
  49   def BindMeasurementJavaScript(self, tab, start_js, stop_js):
  50     # Make the pinch action start and stop measurement automatically.
  51     tab.ExecuteJavaScript("""
  52         window.__pinchAction.beginMeasuringHook = function() { %s };
  53         window.__pinchAction.endMeasuringHook = function() { %s };
  54     """ % (start_js, stop_js))
  55
  56   def GetTimelineMarkerLabel(self):
  57     return 'SyntheticGestureController::running'