Screen Orientation API: screen.orientation & orientationchange event

Source/modules/screen_orientation/ScreenOrientationDispatcher.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 ScreenOrientationDispatcher_h
+#define ScreenOrientationDispatcher_h
+
+#include "public/platform/WebScreenOrientationListener.h"
+#include "wtf/Vector.h"
+
+namespace WebCore {
+
+class ScreenOrientationController;
+
+class ScreenOrientationDispatcher FINAL : public blink::WebScreenOrientationListener {
+public:
+    static ScreenOrientationDispatcher& instance();
+
+    void addController(ScreenOrientationController*);
+    void removeController(ScreenOrientationController*);
+
+private:
+    ScreenOrientationDispatcher();
+
+    void purgeControllers();
+    void startListening();
+    void stopListening();
+
+    // WebScreenOrientationListener API.
+    virtual void didChangeScreenOrientation(blink::WebScreenOrientation) OVERRIDE;
+
+    Vector<ScreenOrientationController*> m_controllers;
+    bool m_needsPurge;
+    bool m_isDispatching;
+};
+
+} // namespace WebCore
+
+#endif // ScreenOrientationDispatcher_h