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eb5642168c
Depends on D145757 Differential Revision: https://phabricator.services.mozilla.com/D145758
50 lines
1.7 KiB
C++
50 lines
1.7 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_dom_PerformancePaintTiming_h___
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#define mozilla_dom_PerformancePaintTiming_h___
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#include "mozilla/dom/PerformanceEntry.h"
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#include "mozilla/dom/PerformancePaintTimingBinding.h"
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namespace mozilla::dom {
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class Performance;
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// https://w3c.github.io/paint-timing/#sec-PerformancePaintTiming
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// Unlike timeToContentfulPaint, this timing is generated during
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// displaylist building, when a frame is contentful, we collect
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// the timestamp. Whereas, timeToContentfulPaint uses a compositor-side
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// timestamp.
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class PerformancePaintTiming final : public PerformanceEntry {
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public:
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PerformancePaintTiming(Performance* aPerformance, const nsAString& aName,
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const TimeStamp& aStartTime);
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NS_DECL_ISUPPORTS_INHERITED
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NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(PerformancePaintTiming,
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PerformanceEntry)
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JSObject* WrapObject(JSContext* aCx,
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JS::Handle<JSObject*> aGivenProto) override;
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DOMHighResTimeStamp StartTime() const override;
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size_t SizeOfIncludingThis(
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mozilla::MallocSizeOf aMallocSizeOf) const override;
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private:
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~PerformancePaintTiming();
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RefPtr<Performance> mPerformance;
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const TimeStamp mRawStartTime;
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mutable Maybe<DOMHighResTimeStamp> mCachedStartTime;
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};
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} // namespace mozilla::dom
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#endif /* mozilla_dom_PerformanacePaintTiming_h___ */
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