Simulate interactivity boost for simulated user input events

telemetry/telemetry/internal/actions/repeatable_scroll.py

 # Copyright 2015 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.
 
 import numbers
 
 from telemetry.internal.actions import page_action
 from telemetry.internal.actions import utils
 from telemetry.web_perf import timeline_interaction_record
 
 
 class RepeatableScrollAction(page_action.PageAction):
 
   def __init__(self, x_scroll_distance_ratio=0.0, y_scroll_distance_ratio=0.5,
                repeat_count=0, repeat_delay_ms=250, timeout=60,
                prevent_fling=None, speed=None):
     super(RepeatableScrollAction, self).__init__()
     self._x_scroll_distance_ratio = x_scroll_distance_ratio
     self._y_scroll_distance_ratio = y_scroll_distance_ratio
     self._repeat_count = repeat_count
     self._repeat_delay_ms = repeat_delay_ms
     self._windowsize = []
     self._timeout = timeout
     self._prevent_fling = prevent_fling
     self._speed = speed
 
+  def SimulatesUserInput(self):
+    return True
+
   def WillRunAction(self, tab):
     utils.InjectJavaScript(tab, 'gesture_common.js')
     # Get the dimensions of the screen.
     self._windowsize = tab.EvaluateJavaScript(
         '[__GestureCommon_GetWindowWidth(),'
         ' __GestureCommon_GetWindowHeight()]')
     assert len(self._windowsize) == 2
     assert all(isinstance(d, numbers.Number) for d in self._windowsize)
 
   def RunAction(self, tab):
     # Set up a browser driven repeating scroll. The delay between the scrolls
     # should be unaffected by render thread responsivness (or lack there of).
     tab.SynthesizeScrollGesture(
         x=int(self._windowsize[0] / 2),
         y=int(self._windowsize[1] / 2),
         xDistance=int(self._x_scroll_distance_ratio * self._windowsize[0]),
         yDistance=int(-self._y_scroll_distance_ratio * self._windowsize[1]),
         preventFling=self._prevent_fling,
         speed=self._speed,
         repeatCount=self._repeat_count,
         repeatDelayMs=self._repeat_delay_ms,
         interactionMarkerName=timeline_interaction_record.GetJavaScriptMarker(
             'Gesture_ScrollAction', [timeline_interaction_record.REPEATABLE]),
         timeout=self._timeout)