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// Copyright 2016 The Cobalt Authors. 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.
#include "cobalt/dom/dom_stat_tracker.h"
#include "base/strings/stringprintf.h"
namespace cobalt {
namespace dom {
DomStatTracker::DomStatTracker(const std::string& name)
: count_html_element_(
base::StringPrintf("Count.%s.DOM.HtmlElement", name.c_str()), 0,
"Total number of HTML elements."),
count_html_element_document_(
base::StringPrintf("Count.%s.DOM.HtmlElement.Document", name.c_str()),
0, "Number of HTML elements in the document."),
count_html_element_created_(0),
count_html_element_destroyed_(0),
count_html_element_document_added_(0),
count_html_element_document_removed_(0),
script_element_execute_count_(
base::StringPrintf("Count.%s.DOM.HtmlScriptElement.Execute",
name.c_str()),
0, "Count of HTML script element execute calls."),
script_element_execute_total_size_(
base::StringPrintf("Memory.%s.DOM.HtmlScriptElement.Execute",
name.c_str()),
0, "Total size in bytes of HTML script elements executed."),
script_element_execute_time_(
base::StringPrintf("Time.%s.DOM.HtmlScriptElement.Execute",
name.c_str()),
0, "Time of the last HTML script element execute."),
is_tracking_event_(false),
event_initial_count_html_element_(0),
event_initial_count_html_element_document_(0),
event_count_html_element_created_(0),
event_count_html_element_destroyed_(0),
event_count_html_element_document_added_(0),
event_count_html_element_document_removed_(0),
event_count_update_matching_rules_(0),
event_count_update_computed_style_(0),
event_count_generate_html_element_computed_style_(0),
event_count_generate_pseudo_element_computed_style_(0),
event_video_start_delay_stop_watch_(kStopWatchTypeEventVideoStartDelay,
base::StopWatch::kAutoStartOff, this),
event_video_start_delay_(
base::StringPrintf("Event.Duration.%s.DOM.VideoStartDelay",
name.c_str()),
base::TimeDelta(), "Total delay between event and video starting.") {
stop_watch_durations_.resize(kNumStopWatchTypes, base::TimeDelta());
}
DomStatTracker::~DomStatTracker() {
FlushPeriodicTracking();
// Verify that all of the elements were removed from the document and
// destroyed.
DCHECK_EQ(count_html_element_, 0);
DCHECK_EQ(count_html_element_document_, 0);
event_video_start_delay_stop_watch_.Stop();
}
void DomStatTracker::OnHtmlElementCreated() {
++count_html_element_created_;
if (is_tracking_event_) {
++event_count_html_element_created_;
}
}
void DomStatTracker::OnHtmlElementDestroyed() {
++count_html_element_destroyed_;
if (is_tracking_event_) {
++event_count_html_element_destroyed_;
}
}
void DomStatTracker::OnHtmlElementInsertedIntoDocument() {
++count_html_element_document_added_;
if (is_tracking_event_) {
++event_count_html_element_document_added_;
}
}
void DomStatTracker::OnHtmlElementRemovedFromDocument() {
++count_html_element_document_removed_;
if (is_tracking_event_) {
++event_count_html_element_document_removed_;
}
}
void DomStatTracker::OnUpdateMatchingRules() {
if (is_tracking_event_) {
++event_count_update_matching_rules_;
}
}
void DomStatTracker::OnUpdateComputedStyle() {
if (is_tracking_event_) {
++event_count_update_computed_style_;
}
}
void DomStatTracker::OnGenerateHtmlElementComputedStyle() {
if (is_tracking_event_) {
++event_count_generate_html_element_computed_style_;
}
}
void DomStatTracker::OnGeneratePseudoElementComputedStyle() {
if (is_tracking_event_) {
++event_count_generate_pseudo_element_computed_style_;
}
}
void DomStatTracker::OnHtmlScriptElementExecuted(size_t script_size) {
++script_element_execute_count_;
script_element_execute_total_size_ += script_size;
script_element_execute_time_ = base::TimeTicks::Now().ToInternalValue();
}
void DomStatTracker::OnHtmlVideoElementPlaying() {
if (event_video_start_delay_stop_watch_.IsCounting()) {
event_video_start_delay_stop_watch_.Stop();
event_video_start_delay_ =
stop_watch_durations_[kStopWatchTypeEventVideoStartDelay];
}
}
void DomStatTracker::FlushPeriodicTracking() {
// Update the CVals before clearing the periodic values.
count_html_element_ +=
count_html_element_created_ - count_html_element_destroyed_;
count_html_element_document_ +=
count_html_element_document_added_ - count_html_element_document_removed_;
// Now clear the values.
count_html_element_created_ = 0;
count_html_element_destroyed_ = 0;
count_html_element_document_added_ = 0;
count_html_element_document_removed_ = 0;
}
void DomStatTracker::StartTrackingEvent() {
DCHECK(!is_tracking_event_);
is_tracking_event_ = true;
event_initial_count_html_element_ = count_html_element_ +
count_html_element_created_ -
count_html_element_destroyed_;
event_initial_count_html_element_document_ =
count_html_element_document_ + count_html_element_document_added_ -
count_html_element_document_removed_;
event_count_html_element_created_ = 0;
event_count_html_element_destroyed_ = 0;
event_count_html_element_document_added_ = 0;
event_count_html_element_document_removed_ = 0;
event_count_update_matching_rules_ = 0;
event_count_update_computed_style_ = 0;
event_count_generate_html_element_computed_style_ = 0;
event_count_generate_pseudo_element_computed_style_ = 0;
// Stop the watch before re-starting it. This ensures that the count is
// zeroed out if it was still running from the prior event (this is a common
// case as most events do not result in a video starting).
event_video_start_delay_stop_watch_.Stop();
event_video_start_delay_stop_watch_.Start();
event_video_start_delay_ = base::TimeDelta();
// Zero out the stop watch durations so that the numbers will only include the
// event.
for (size_t i = 0; i < kNumStopWatchTypes; ++i) {
stop_watch_durations_[i] = base::TimeDelta();
}
}
void DomStatTracker::StopTrackingEvent() {
DCHECK(is_tracking_event_);
is_tracking_event_ = false;
}
int DomStatTracker::EventCountHtmlElement() const {
return event_initial_count_html_element_ + event_count_html_element_created_ -
event_count_html_element_destroyed_;
}
int DomStatTracker::EventCountHtmlElementDocument() const {
return event_initial_count_html_element_document_ +
event_count_html_element_document_added_ -
event_count_html_element_document_removed_;
}
base::TimeDelta DomStatTracker::GetStopWatchTypeDuration(
StopWatchType type) const {
return stop_watch_durations_[type];
}
bool DomStatTracker::IsStopWatchEnabled(int id) const {
return is_tracking_event_ || id == kStopWatchTypeEventVideoStartDelay;
}
void DomStatTracker::OnStopWatchStopped(int id, base::TimeDelta time_elapsed) {
stop_watch_durations_[static_cast<size_t>(id)] += time_elapsed;
}
} // namespace dom
} // namespace cobalt