| // Copyright 2015 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. |
| |
| #ifndef THIRD_PARTY_BLINK_RENDERER_CORE_TIMING_PERFORMANCE_OBSERVER_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_CORE_TIMING_PERFORMANCE_OBSERVER_H_ |
| |
| #include "third_party/blink/renderer/bindings/core/v8/active_script_wrappable.h" |
| #include "third_party/blink/renderer/core/core_export.h" |
| #include "third_party/blink/renderer/core/execution_context/execution_context_lifecycle_state_observer.h" |
| #include "third_party/blink/renderer/core/timing/performance_entry.h" |
| #include "third_party/blink/renderer/platform/heap/handle.h" |
| #include "third_party/blink/renderer/platform/wtf/vector.h" |
| |
| namespace blink { |
| |
| class ExecutionContext; |
| class ExceptionState; |
| class Performance; |
| class PerformanceObserver; |
| class PerformanceObserverInit; |
| class V8PerformanceObserverCallback; |
| |
| using PerformanceEntryVector = HeapVector<Member<PerformanceEntry>>; |
| |
| class CORE_EXPORT PerformanceObserver final |
| : public ScriptWrappable, |
| public ActiveScriptWrappable<PerformanceObserver>, |
| public ExecutionContextLifecycleStateObserver { |
| DEFINE_WRAPPERTYPEINFO(); |
| friend class Performance; |
| friend class PerformanceTest; |
| friend class PerformanceObserverTest; |
| |
| public: |
| static PerformanceObserver* Create(ScriptState*, |
| V8PerformanceObserverCallback*); |
| static Vector<AtomicString> supportedEntryTypes(ScriptState*); |
| static constexpr DOMHighResTimeStamp kDefaultDurationThreshold = 104; |
| |
| PerformanceObserver(ExecutionContext*, |
| Performance*, |
| V8PerformanceObserverCallback*); |
| |
| void observe(const PerformanceObserverInit*, ExceptionState&); |
| void disconnect(); |
| PerformanceEntryVector takeRecords(); |
| void EnqueuePerformanceEntry(PerformanceEntry&); |
| PerformanceEntryTypeMask FilterOptions() const { return filter_options_; } |
| bool CanObserve(const PerformanceEntry&) const; |
| |
| // ScriptWrappable |
| bool HasPendingActivity() const final; |
| |
| void ContextLifecycleStateChanged(mojom::FrameLifecycleState) final; |
| void ContextDestroyed() final {} |
| |
| void Trace(Visitor*) const override; |
| |
| private: |
| // This describes the types of parameters that an observer can have in its |
| // observe() function. An observer of type kEntryTypesObserver has already |
| // made a call observe({entryTypes...}) so can only do subsequent observe() |
| // calls with the 'entryTypes' parameter. An observer of type kTypeObserver |
| // has already made a call observe({type...}) so it can only perform |
| // subsequent observe() calls with the 'type' parameter. An observer of type |
| // kUnknown has not called observe(). |
| enum class PerformanceObserverType { |
| kEntryTypesObserver, |
| kTypeObserver, |
| kUnknown, |
| }; |
| void Deliver(); |
| |
| Member<V8PerformanceObserverCallback> callback_; |
| WeakMember<Performance> performance_; |
| PerformanceEntryVector performance_entries_; |
| PerformanceEntryTypeMask filter_options_; |
| PerformanceObserverType type_; |
| bool is_registered_; |
| // PerformanceEventTiming entries with a duration that is as long as this |
| // threshold are regarded as long-latency events by the Event Timing API. |
| // Shorter-latency events are ignored. Default value can be overriden via a |
| // call to observe(). |
| DOMHighResTimeStamp duration_threshold_ = kDefaultDurationThreshold; |
| }; |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_CORE_TIMING_PERFORMANCE_OBSERVER_H_ |