1 files changed, 49 insertions, 0 deletions
diff --git a/dom/base/ScreenLuminance.h b/dom/base/ScreenLuminance.h
new file mode 100644
index 0000000000..5595fd734b
--- /dev/null
+++ b/dom/base/ScreenLuminance.h
@@ -0,0 +1,49 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 et tw=78: */
+/* 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_ScreenLuminance_h
+#define mozilla_dom_ScreenLuminance_h
+
+#include "nsCycleCollectionParticipant.h"
+#include "nsISupportsImpl.h"
+#include "nsWrapperCache.h"
+
+class nsScreen;
+
+namespace mozilla::dom {
+
+class ScreenLuminance final : public nsWrapperCache {
+ public:
+  // Ref counting and cycle collection
+  NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(ScreenLuminance)
+  NS_DECL_CYCLE_COLLECTION_NATIVE_WRAPPERCACHE_CLASS(ScreenLuminance)
+
+  // WebIDL methods
+  double Min() const { return mMin; }
+  double Max() const { return mMax; }
+  double MaxAverage() const { return mMaxAverage; }
+  // End WebIDL methods
+
+  ScreenLuminance(nsScreen* aScreen, double aMin, double aMax,
+                  double aMaxAverage)
+      : mScreen(aScreen), mMin(aMin), mMax(aMax), mMaxAverage(aMaxAverage) {}
+
+  nsScreen* GetParentObject() const { return mScreen; }
+  JSObject* WrapObject(JSContext* aCx,
+                       JS::Handle<JSObject*> aGivenProto) override;
+
+ private:
+  virtual ~ScreenLuminance() = default;
+
+  RefPtr<nsScreen> mScreen;
+  double mMin;
+  double mMax;
+  double mMaxAverage;
+};
+
+}  // namespace mozilla::dom
+
+#endif  // mozilla_dom_ScreenLuminance_h