sdk/platform-tools/systrace/catapult/telemetry/telemetry/internal/actions/repeatable_scroll.py

   1 # Copyright 2015 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
   5 import numbers
   6
   7 from telemetry.internal.actions import page_action
   8 from telemetry.internal.actions import utils
   9 from telemetry.web_perf import timeline_interaction_record
  10
  11
  12 class RepeatableScrollAction(page_action.PageAction):
  13
  14   def __init__(self, x_scroll_distance_ratio=0.0, y_scroll_distance_ratio=0.5,
  15                repeat_count=0, repeat_delay_ms=250, timeout=60,
  16                prevent_fling=None, speed=None):
  17     super(RepeatableScrollAction, self).__init__()
  18     self._x_scroll_distance_ratio = x_scroll_distance_ratio
  19     self._y_scroll_distance_ratio = y_scroll_distance_ratio
  20     self._repeat_count = repeat_count
  21     self._repeat_delay_ms = repeat_delay_ms
  22     self._windowsize = []
  23     self._timeout = timeout
  24     self._prevent_fling = prevent_fling
  25     self._speed = speed
  26
  27   def WillRunAction(self, tab):
  28     utils.InjectJavaScript(tab, 'gesture_common.js')
  29     # Get the dimensions of the screen.
  30     self._windowsize = tab.EvaluateJavaScript(
  31         '[__GestureCommon_GetWindowWidth(),'
  32         ' __GestureCommon_GetWindowHeight()]')
  33     assert len(self._windowsize) == 2
  34     assert all(isinstance(d, numbers.Number) for d in self._windowsize)
  35
  36   def RunAction(self, tab):
  37     # Set up a browser driven repeating scroll. The delay between the scrolls
  38     # should be unaffected by render thread responsivness (or lack there of).
  39     tab.SynthesizeScrollGesture(
  40         x=int(self._windowsize[0] / 2),
  41         y=int(self._windowsize[1] / 2),
  42         xDistance=int(self._x_scroll_distance_ratio * self._windowsize[0]),
  43         yDistance=int(-self._y_scroll_distance_ratio * self._windowsize[1]),
  44         preventFling=self._prevent_fling,
  45         speed=self._speed,
  46         repeatCount=self._repeat_count,
  47         repeatDelayMs=self._repeat_delay_ms,
  48         interactionMarkerName=timeline_interaction_record.GetJavaScriptMarker(
  49             'Gesture_ScrollAction', [timeline_interaction_record.REPEATABLE]),
  50         timeout=self._timeout)