diff -r 000000000000 -r 6474c204b198 dom/base/nsScreen.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/base/nsScreen.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,165 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 nsScreen_h___
+#define nsScreen_h___
+
+#include "mozilla/Attributes.h"
+#include "mozilla/dom/ScreenOrientation.h"
+#include "mozilla/DOMEventTargetHelper.h"
+#include "mozilla/ErrorResult.h"
+#include "mozilla/HalScreenConfiguration.h"
+#include "nsIDOMScreen.h"
+#include "nsCOMPtr.h"
+#include "nsRect.h"
+
+class nsDeviceContext;
+
+// Script "screen" object
+class nsScreen : public mozilla::DOMEventTargetHelper
+               , public nsIDOMScreen
+               , public mozilla::hal::ScreenConfigurationObserver
+{
+  typedef mozilla::ErrorResult ErrorResult;
+public:
+  static already_AddRefed<nsScreen> Create(nsPIDOMWindow* aWindow);
+
+  NS_DECL_ISUPPORTS_INHERITED
+  NS_DECL_NSIDOMSCREEN
+  NS_REALLY_FORWARD_NSIDOMEVENTTARGET(mozilla::DOMEventTargetHelper)
+
+  nsPIDOMWindow* GetParentObject() const
+  {
+    return GetOwner();
+  }
+
+  int32_t GetTop(ErrorResult& aRv)
+  {
+    nsRect rect;
+    aRv = GetRect(rect);
+    return rect.y;
+  }
+
+  int32_t GetLeft(ErrorResult& aRv)
+  {
+    nsRect rect;
+    aRv = GetRect(rect);
+    return rect.x;
+  }
+
+  int32_t GetWidth(ErrorResult& aRv)
+  {
+    nsRect rect;
+    if (IsDeviceSizePageSize()) {
+      nsCOMPtr<nsPIDOMWindow> owner = GetOwner();
+      if (owner) {
+        int32_t innerWidth = 0;
+        aRv = owner->GetInnerWidth(&innerWidth);
+        return innerWidth;
+      }
+    }
+
+    aRv = GetRect(rect);
+    return rect.width;
+  }
+
+  int32_t GetHeight(ErrorResult& aRv)
+  {
+    nsRect rect;
+    if (IsDeviceSizePageSize()) {
+      nsCOMPtr<nsPIDOMWindow> owner = GetOwner();
+      if (owner) {
+        int32_t innerHeight = 0;
+        aRv = owner->GetInnerHeight(&innerHeight);
+        return innerHeight;
+      }
+    }
+
+    aRv = GetRect(rect);
+    return rect.height;
+  }
+
+  int32_t GetPixelDepth(ErrorResult& aRv);
+  int32_t GetColorDepth(ErrorResult& aRv)
+  {
+    return GetPixelDepth(aRv);
+  }
+
+  int32_t GetAvailTop(ErrorResult& aRv)
+  {
+    nsRect rect;
+    aRv = GetAvailRect(rect);
+    return rect.y;
+  }
+
+  int32_t GetAvailLeft(ErrorResult& aRv)
+  {
+    nsRect rect;
+    aRv = GetAvailRect(rect);
+    return rect.x;
+  }
+
+  int32_t GetAvailWidth(ErrorResult& aRv)
+  {
+    nsRect rect;
+    aRv = GetAvailRect(rect);
+    return rect.width;
+  }
+
+  int32_t GetAvailHeight(ErrorResult& aRv)
+  {
+    nsRect rect;
+    aRv = GetAvailRect(rect);
+    return rect.height;
+  }
+
+  void GetMozOrientation(nsString& aOrientation);
+
+  IMPL_EVENT_HANDLER(mozorientationchange)
+
+  bool MozLockOrientation(const nsAString& aOrientation, ErrorResult& aRv);
+  bool MozLockOrientation(const mozilla::dom::Sequence<nsString>& aOrientations, ErrorResult& aRv);
+  void MozUnlockOrientation();
+
+  virtual JSObject* WrapObject(JSContext* aCx) MOZ_OVERRIDE;
+
+  void Notify(const mozilla::hal::ScreenConfiguration& aConfiguration);
+
+protected:
+  nsDeviceContext* GetDeviceContext();
+  nsresult GetRect(nsRect& aRect);
+  nsresult GetAvailRect(nsRect& aRect);
+  bool IsChrome();
+  nsresult GetDOMWindow(nsIDOMWindow **aResult);
+  nsresult GetWindowInnerRect(nsRect& aRect);
+
+  mozilla::dom::ScreenOrientation mOrientation;
+
+private:
+  class FullScreenEventListener MOZ_FINAL : public nsIDOMEventListener
+  {
+  public:
+    FullScreenEventListener() {};
+
+    NS_DECL_ISUPPORTS
+    NS_DECL_NSIDOMEVENTLISTENER
+  };
+
+  nsScreen(nsPIDOMWindow* aWindow);
+  virtual ~nsScreen();
+
+  enum LockPermission {
+    LOCK_DENIED,
+    FULLSCREEN_LOCK_ALLOWED,
+    LOCK_ALLOWED
+  };
+
+  LockPermission GetLockOrientationPermission() const;
+
+  bool IsDeviceSizePageSize();
+
+  nsRefPtr<FullScreenEventListener> mEventListener;
+};
+
+#endif /* nsScreen_h___ */