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-rw-r--r--dom/performance/LargestContentfulPaint.cpp85
1 files changed, 85 insertions, 0 deletions
diff --git a/dom/performance/LargestContentfulPaint.cpp b/dom/performance/LargestContentfulPaint.cpp
new file mode 100644
index 0000000000..29984ade73
--- /dev/null
+++ b/dom/performance/LargestContentfulPaint.cpp
@@ -0,0 +1,85 @@
+/* -*- 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 "mozilla/dom/Element.h"
+#include "nsContentUtils.h"
+#include "nsRFPService.h"
+#include "Performance.h"
+#include "PerformanceMainThread.h"
+#include "LargestContentfulPaint.h"
+
+namespace mozilla::dom {
+
+NS_IMPL_CYCLE_COLLECTION_INHERITED(LargestContentfulPaint, PerformanceEntry,
+ mPerformance, mURI, mElement)
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(LargestContentfulPaint)
+NS_INTERFACE_MAP_END_INHERITING(PerformanceEntry)
+
+NS_IMPL_ADDREF_INHERITED(LargestContentfulPaint, PerformanceEntry)
+NS_IMPL_RELEASE_INHERITED(LargestContentfulPaint, PerformanceEntry)
+
+LargestContentfulPaint::LargestContentfulPaint(Performance* aPerformance,
+ DOMHighResTimeStamp aRenderTime,
+ DOMHighResTimeStamp aLoadTime,
+ unsigned long aSize,
+ nsIURI* aURI, Element* aElement)
+ : PerformanceEntry(aPerformance->GetParentObject(), u""_ns,
+ kLargestContentfulPaintName),
+ mPerformance(static_cast<PerformanceMainThread*>(aPerformance)),
+ mRenderTime(aRenderTime),
+ mLoadTime(aLoadTime),
+ mSize(aSize),
+ mURI(aURI),
+ mElement(aElement) {
+ MOZ_ASSERT(mPerformance);
+ MOZ_ASSERT(mElement);
+ // The element could be a pseudo-element
+ if (mElement->ChromeOnlyAccess()) {
+ mElement = Element::FromNodeOrNull(
+ aElement->FindFirstNonChromeOnlyAccessContent());
+ }
+
+ if (const Element* element = GetElement()) {
+ mId = element->GetID();
+ }
+}
+
+JSObject* LargestContentfulPaint::WrapObject(
+ JSContext* aCx, JS::Handle<JSObject*> aGivenProto) {
+ return LargestContentfulPaint_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+Element* LargestContentfulPaint::GetElement() const {
+ return mElement ? nsContentUtils::GetAnElementForTiming(
+ mElement, mElement->GetComposedDoc(), nullptr)
+ : nullptr;
+}
+
+DOMHighResTimeStamp LargestContentfulPaint::RenderTime() const {
+ return nsRFPService::ReduceTimePrecisionAsMSecs(
+ mRenderTime, mPerformance->GetRandomTimelineSeed(),
+ mPerformance->GetRTPCallerType());
+}
+
+DOMHighResTimeStamp LargestContentfulPaint::LoadTime() const {
+ return nsRFPService::ReduceTimePrecisionAsMSecs(
+ mLoadTime, mPerformance->GetRandomTimelineSeed(),
+ mPerformance->GetRTPCallerType());
+}
+
+DOMHighResTimeStamp LargestContentfulPaint::StartTime() const {
+ DOMHighResTimeStamp startTime = !mRenderTime ? mLoadTime : mRenderTime;
+ return nsRFPService::ReduceTimePrecisionAsMSecs(
+ startTime, mPerformance->GetRandomTimelineSeed(),
+ mPerformance->GetRTPCallerType());
+}
+
+void LargestContentfulPaint::GetUrl(nsAString& aUrl) {
+ if (mURI) {
+ CopyUTF8toUTF16(mURI->GetSpecOrDefault(), aUrl);
+ }
+}
+} // namespace mozilla::dom