| # Copyright 2014 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 copy |
| |
| from telemetry.web_perf import timeline_interaction_record as tir_module |
| |
| |
| def GetAdjustedInteractionIfContainGesture(timeline, interaction_record): |
| """ Returns a new interaction record if interaction_record contains geture |
| whose time range that overlaps with interaction_record's range. If not, |
| returns a clone of original interaction_record. |
| The synthetic gesture controller inserts a trace marker to precisely |
| demarcate when the gesture was running. We check for overlap, not inclusion, |
| because gesture_actions can start/end slightly outside the telemetry markers |
| on Windows. This problem is probably caused by a race condition between |
| the browser and renderer process submitting the trace events for the |
| markers. |
| """ |
| # Only adjust the range for gestures. |
| if not interaction_record.label.startswith('Gesture_'): |
| return copy.copy(interaction_record) |
| gesture_events = [ |
| ev for ev |
| in timeline.IterAllAsyncSlicesOfName('SyntheticGestureController::running') |
| if ev.parent_slice is None and |
| ev.start <= interaction_record.end and |
| ev.end >= interaction_record.start] |
| if len(gesture_events) == 0: |
| return copy.copy(interaction_record) |
| if len(gesture_events) > 1: |
| raise Exception('More than one possible synthetic gesture marker found in ' |
| 'interaction_record %s.' % interaction_record.label) |
| return tir_module.TimelineInteractionRecord( |
| interaction_record.label, gesture_events[0].start, |
| gesture_events[0].end, gesture_events[0], |
| interaction_record._flags) # pylint: disable=protected-access |
