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-rw-r--r--dom/performance/PerformancePaintTiming.cpp52
1 files changed, 52 insertions, 0 deletions
diff --git a/dom/performance/PerformancePaintTiming.cpp b/dom/performance/PerformancePaintTiming.cpp
new file mode 100644
index 0000000000..83eed06565
--- /dev/null
+++ b/dom/performance/PerformancePaintTiming.cpp
@@ -0,0 +1,52 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "PerformancePaintTiming.h"
+#include "Performance.h"
+#include "MainThreadUtils.h"
+#include "mozilla/dom/PerformanceMeasureBinding.h"
+#include "nsRFPService.h"
+
+using namespace mozilla::dom;
+
+NS_IMPL_CYCLE_COLLECTION_INHERITED(PerformancePaintTiming, PerformanceEntry,
+ mPerformance)
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(PerformancePaintTiming)
+NS_INTERFACE_MAP_END_INHERITING(PerformanceEntry)
+
+NS_IMPL_ADDREF_INHERITED(PerformancePaintTiming, PerformanceEntry)
+NS_IMPL_RELEASE_INHERITED(PerformancePaintTiming, PerformanceEntry)
+
+PerformancePaintTiming::PerformancePaintTiming(Performance* aPerformance,
+ const nsAString& aName,
+ const TimeStamp& aStartTime)
+ : PerformanceEntry(aPerformance->GetParentObject(), aName, u"paint"_ns),
+ mPerformance(aPerformance),
+ mRawStartTime(aStartTime) {}
+
+PerformancePaintTiming::~PerformancePaintTiming() = default;
+
+JSObject* PerformancePaintTiming::WrapObject(
+ JSContext* aCx, JS::Handle<JSObject*> aGivenProto) {
+ return PerformancePaintTiming_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+DOMHighResTimeStamp PerformancePaintTiming::StartTime() const {
+ if (mCachedStartTime.isNothing()) {
+ DOMHighResTimeStamp rawValue =
+ mPerformance->GetDOMTiming()->TimeStampToDOMHighRes(mRawStartTime);
+ mCachedStartTime.emplace(nsRFPService::ReduceTimePrecisionAsMSecs(
+ rawValue, mPerformance->GetRandomTimelineSeed(),
+ mPerformance->GetRTPCallerType()));
+ }
+ return mCachedStartTime.value();
+}
+
+size_t PerformancePaintTiming::SizeOfIncludingThis(
+ mozilla::MallocSizeOf aMallocSizeOf) const {
+ return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
+}