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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/core/timing/event_timing.h"
#include <optional>
#include "base/time/tick_clock.h"
#include "third_party/blink/renderer/core/dom/events/event.h"
#include "third_party/blink/renderer/core/events/keyboard_event.h"
#include "third_party/blink/renderer/core/events/pointer_event.h"
#include "third_party/blink/renderer/core/events/touch_event.h"
#include "third_party/blink/renderer/core/events/wheel_event.h"
#include "third_party/blink/renderer/core/frame/local_dom_window.h"
#include "third_party/blink/renderer/core/loader/interactive_detector.h"
#include "third_party/blink/renderer/core/timing/dom_window_performance.h"
#include "third_party/blink/renderer/core/timing/performance_event_timing.h"
#include "third_party/blink/renderer/platform/runtime_enabled_features.h"
namespace blink {
namespace {
const base::TickClock* g_clock_for_testing = nullptr;
static base::TimeTicks Now() {
return g_clock_for_testing ? g_clock_for_testing->NowTicks()
: base::TimeTicks::Now();
}
bool ShouldLogEvent(const Event& event) {
return event.type() == event_type_names::kPointerdown ||
event.type() == event_type_names::kPointerup ||
event.type() == event_type_names::kClick ||
event.type() == event_type_names::kKeydown ||
event.type() == event_type_names::kMousedown ||
event.type() == event_type_names::kMouseup;
}
} // namespace
EventTiming::EventTiming(base::TimeTicks processing_start,
WindowPerformance* performance,
const Event& event,
EventTarget* hit_test_target)
: performance_(performance), event_(&event) {
performance_->EventTimingProcessingStart(event, processing_start,
hit_test_target);
}
// static
void EventTiming::HandleInputDelay(LocalDOMWindow* window,
const Event& event,
base::TimeTicks processing_start) {
auto* pointer_event = DynamicTo<PointerEvent>(&event);
base::TimeTicks event_timestamp =
pointer_event ? pointer_event->OldestPlatformTimeStamp()
: event.PlatformTimeStamp();
if (ShouldLogEvent(event) && event.isTrusted()) {
InteractiveDetector* interactive_detector =
InteractiveDetector::From(*window->document());
if (interactive_detector) {
interactive_detector->HandleForInputDelay(event, event_timestamp,
processing_start);
}
}
}
// static
bool EventTiming::IsEventTypeForEventTiming(const Event& event) {
// Include only trusted events of certain kinds. Explicitly excluding input
// events that are considered continuous: event types for which the user agent
// may have timer-based dispatch under certain conditions. These are excluded
// since EventCounts cannot be used to properly computed percentiles on those.
// See spec: https://wicg.github.io/event-timing/#sec-events-exposed.
// Needs to be kept in sync with WebInputEvent::IsWebInteractionEvent(),
// except non-raw web input event types, for example kCompositionend.
return (event.isTrusted() ||
event.type() == event_type_names::kCompositionend) &&
(IsA<MouseEvent>(event) || IsA<PointerEvent>(event) ||
IsA<TouchEvent>(event) || IsA<KeyboardEvent>(event) ||
IsA<WheelEvent>(event) || event.IsInputEvent() ||
event.IsCompositionEvent() || event.IsDragEvent()) &&
event.type() != event_type_names::kMousemove &&
event.type() != event_type_names::kPointermove &&
event.type() != event_type_names::kPointerrawupdate &&
event.type() != event_type_names::kTouchmove &&
event.type() != event_type_names::kWheel &&
event.type() != event_type_names::kDrag;
}
// static
std::optional<EventTiming> EventTiming::TryCreate(
LocalDOMWindow* window,
const Event& event,
EventTarget* hit_test_target) {
auto* performance = DOMWindowPerformance::performance(*window);
if (!performance || !IsEventTypeForEventTiming(event)) {
return std::nullopt;
}
// Most events track their performance in EventDispatcher::Dispatch but
// some event types which can be filtered are tracked at the point
// where they may be filtered. This condition check ensures we don't create
// two EventTiming objects for the same Event.
if (performance->GetCurrentEventTimingEvent() == &event)
return std::nullopt;
base::TimeTicks processing_start = Now();
// TODO(mmocny): Move this out of ::TryCreate and into the Constructor,
// or even further in window_performance / responsiveness_metrics
HandleInputDelay(window, event, processing_start);
return EventTiming(processing_start, performance, event, hit_test_target);
}
// static
void EventTiming::SetTickClockForTesting(const base::TickClock* clock) {
g_clock_for_testing = clock;
}
EventTiming::~EventTiming() {
// event_ might potentially be null if this is std::move()-ed.
if (event_) {
performance_->EventTimingProcessingEnd(*event_, Now());
}
}
} // namespace blink
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