Screen Orientation API: screen.orientation & orientationchange event

Source/modules/screen_orientation/ScreenOrientationController.h

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef ScreenOrientationController_h
+#define ScreenOrientationController_h
+
+#include "modules/screen_orientation/ScreenOrientation.h"
+#include "platform/Supplementable.h"
+#include "wtf/HashSet.h"
+#include "wtf/PassOwnPtr.h"
+
+namespace WebCore {
+
+class Page;
+
+class ScreenOrientationController : public Supplement<Page> {
+    WTF_MAKE_NONCOPYABLE(ScreenOrientationController);
+public:
+    static PassOwnPtr<ScreenOrientationController> create();
+    virtual ~ScreenOrientationController();
+
+    void addObserver(ScreenOrientation*);
+    void removeObserver(ScreenOrientation*);
+
+    // API for Supplement<Page>.
+    static const char* supplementName();
+    static ScreenOrientationController* from(Page*);
+
+    void orientationChanged(ScreenOrientationValue);
+    ScreenOrientationValue orientation() const { return m_orientation; }
+
+private:
+    ScreenOrientationController();
+
+    ScreenOrientationValue m_orientation;
+    typedef HashSet<ScreenOrientation*> ObserversSet;
+    ObserversSet m_observers;
+};
+
+void provideScreenOrientationTo(Page*);
+
+} // namespace WebCore
+
+#endif // ScreenOrientationController_h