1 files changed, 68 insertions, 0 deletions
diff --git a/dom/performance/LargestContentfulPaint.h b/dom/performance/LargestContentfulPaint.h
new file mode 100644
index 0000000000..e32eb37970
--- /dev/null
+++ b/dom/performance/LargestContentfulPaint.h
@@ -0,0 +1,68 @@
+/* -*- 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/. */
+
+#ifndef mozilla_dom_LargestContentfulPaint_h___
+#define mozilla_dom_LargestContentfulPaint_h___
+
+#include "nsCycleCollectionParticipant.h"
+#include "mozilla/dom/PerformanceEntry.h"
+#include "mozilla/dom/PerformanceLargestContentfulPaintBinding.h"
+#include "nsIWeakReferenceUtils.h"
+
+class nsTextFrame;
+namespace mozilla::dom {
+
+static constexpr nsLiteralString kLargestContentfulPaintName =
+    u"largest-contentful-paint"_ns;
+
+class Performance;
+class PerformanceMainThread;
+
+// https://w3c.github.io/largest-contentful-paint/
+class LargestContentfulPaint final : public PerformanceEntry {
+ public:
+  NS_DECL_ISUPPORTS_INHERITED
+
+  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(LargestContentfulPaint,
+                                           PerformanceEntry)
+
+  LargestContentfulPaint(Performance* aPerformance,
+                         DOMHighResTimeStamp aRenderTime,
+                         DOMHighResTimeStamp aLoadTime, unsigned long aSize,
+                         nsIURI* aURI, Element* aElement);
+
+  JSObject* WrapObject(JSContext* aCx,
+                       JS::Handle<JSObject*> aGivenProto) override;
+
+  DOMHighResTimeStamp RenderTime() const;
+  DOMHighResTimeStamp LoadTime() const;
+  DOMHighResTimeStamp StartTime() const override;
+
+  unsigned long Size() const { return mSize; }
+  void GetId(nsAString& aId) const {
+    if (mId) {
+      mId->ToString(aId);
+    }
+  }
+  void GetUrl(nsAString& aUrl);
+
+  Element* GetElement() const;
+
+ private:
+  ~LargestContentfulPaint() = default;
+
+  RefPtr<PerformanceMainThread> mPerformance;
+
+  DOMHighResTimeStamp mRenderTime;
+  DOMHighResTimeStamp mLoadTime;
+  unsigned long mSize;
+  nsCOMPtr<nsIURI> mURI;
+
+  RefPtr<Element> mElement;
+  RefPtr<nsAtom> mId;
+};
+}  // namespace mozilla::dom
+#endif