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timeline_controller.py
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timeline_controller.py
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# 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.
from telemetry.page import legacy_page_test
from telemetry.timeline.model import TimelineModel
from telemetry.timeline import tracing_config
from telemetry.value import trace
from telemetry.web_perf import smooth_gesture_util
from telemetry.web_perf import timeline_interaction_record as tir_module
RUN_SMOOTH_ACTIONS = 'RunSmoothAllActions'
class TimelineController(object):
def __init__(self, enable_auto_issuing_record=True):
super(TimelineController, self).__init__()
self.trace_categories = None
self._model = None
self._renderer_process = None
self._smooth_records = []
self._interaction = None
self._enable_auto_issuing_record = enable_auto_issuing_record
def SetUp(self, page, tab):
"""Starts gathering timeline data.
"""
# Resets these member variables incase this object is reused.
self._model = None
self._renderer_process = None
if not tab.browser.platform.tracing_controller.IsChromeTracingSupported():
raise Exception('Not supported')
config = tracing_config.TracingConfig()
config.chrome_trace_config.category_filter.AddFilterString(
self.trace_categories)
for delay in page.GetSyntheticDelayCategories():
config.chrome_trace_config.category_filter.AddSyntheticDelay(
delay)
config.enable_chrome_trace = True
tab.browser.platform.tracing_controller.StartTracing(config)
def Start(self, tab):
# Start the smooth marker for all actions.
if self._enable_auto_issuing_record:
self._interaction = tab.action_runner.CreateInteraction(
RUN_SMOOTH_ACTIONS)
self._interaction.Begin()
def Stop(self, tab, results):
# End the smooth marker for all actions.
if self._enable_auto_issuing_record:
self._interaction.End()
# Stop tracing.
timeline_data = tab.browser.platform.tracing_controller.StopTracing()
results.AddValue(trace.TraceValue(
results.current_page, timeline_data))
self._model = TimelineModel(timeline_data)
self._renderer_process = self._model.GetRendererProcessFromTabId(tab.id)
renderer_thread = self.model.GetRendererThreadFromTabId(tab.id)
run_smooth_actions_record = None
self._smooth_records = []
for event in renderer_thread.async_slices:
if not tir_module.IsTimelineInteractionRecord(event.name):
continue
r = tir_module.TimelineInteractionRecord.FromAsyncEvent(event)
if r.label == RUN_SMOOTH_ACTIONS:
assert run_smooth_actions_record is None, (
'TimelineController cannot issue more than 1 %s record' %
RUN_SMOOTH_ACTIONS)
run_smooth_actions_record = r
else:
self._smooth_records.append(
smooth_gesture_util.GetAdjustedInteractionIfContainGesture(
self.model, r))
# If there is no other smooth records, we make measurements on time range
# marked by timeline_controller itself.
# TODO(nednguyen): when crbug.com/239179 is marked fixed, makes sure that
# page sets are responsible for issueing the markers themselves.
if len(self._smooth_records) == 0 and run_smooth_actions_record:
self._smooth_records = [run_smooth_actions_record]
if len(self._smooth_records) == 0:
raise legacy_page_test.Failure('No interaction record was created.')
def CleanUp(self, platform):
if platform.tracing_controller.is_tracing_running:
platform.tracing_controller.StopTracing()
@property
def model(self):
return self._model
@property
def renderer_process(self):
return self._renderer_process
@property
def smooth_records(self):
return self._smooth_records