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// Copyright 2016 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef COBALT_DOM_DOM_STAT_TRACKER_H_
#define COBALT_DOM_DOM_STAT_TRACKER_H_
#include <string>
#include <vector>
#include "cobalt/base/c_val.h"
#include "cobalt/base/stop_watch.h"
namespace cobalt {
namespace dom {
// This class handles tracking DOM stats and is intended for single thread use.
class DomStatTracker : public base::StopWatchOwner {
public:
enum StopWatchType {
kStopWatchTypeRunAnimationFrameCallbacks,
kStopWatchTypeUpdateComputedStyle,
kStopWatchTypeEventVideoStartDelay,
kNumStopWatchTypes,
};
explicit DomStatTracker(const std::string& name);
~DomStatTracker();
// Event-related
void OnStartEvent();
void OnEndEvent();
void OnHtmlVideoElementPlaying();
// Periodic count-related
void OnHtmlElementCreated();
void OnHtmlElementDestroyed();
void OnUpdateMatchingRules();
void OnUpdateComputedStyle();
void OnGenerateHtmlElementComputedStyle();
void OnGeneratePseudoElementComputedStyle();
int total_html_elements() const { return total_html_elements_; }
int html_elements_created_count() const {
return html_elements_created_count_;
}
int html_elements_destroyed_count() const {
return html_elements_destroyed_count_;
}
int update_matching_rules_count() const {
return update_matching_rules_count_;
}
int update_computed_style_count() const {
return update_computed_style_count_;
}
int generate_html_element_computed_style_count() const {
return generate_html_element_computed_style_count_;
}
int generate_pseudo_element_computed_style_count() const {
return generate_pseudo_element_computed_style_count_;
}
base::TimeDelta GetStopWatchTypeDuration(StopWatchType type) const;
private:
// From base::StopWatchOwner
bool IsStopWatchEnabled(int id) const OVERRIDE;
void OnStopWatchStopped(int id, base::TimeDelta time_elapsed) OVERRIDE;
// This function updates the CVals from the periodic values and then clears
// those values.
void FlushPeriodicTracking();
// Count cvals that are updated when the periodic tracking is flushed.
base::CVal<int, base::CValPublic> total_html_elements_;
// Event-related
bool is_event_active_;
// Tracking of videos produced by an event.
base::StopWatch event_video_start_delay_stop_watch_;
base::CVal<base::TimeDelta> event_video_start_delay_;
// Periodic counts. The counts are cleared after the CVals are updated in
// |FlushPeriodicTracking|.
int html_elements_created_count_;
int html_elements_destroyed_count_;
int update_matching_rules_count_;
int update_computed_style_count_;
int generate_html_element_computed_style_count_;
int generate_pseudo_element_computed_style_count_;
// Stop watch-related.
std::vector<base::TimeDelta> stop_watch_durations_;
};
} // namespace dom
} // namespace cobalt
#endif // COBALT_DOM_DOM_STAT_TRACKER_H_