Insert pinch zoom virtual viewport layers to graphics layer tree.

Source/WebKit/chromium/src/PinchViewports.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 10 matching lines @@
  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef ContentDecryptionModuleSession_h
-#define ContentDecryptionModuleSession_h
+#ifndef PinchViewports_h
+#define PinchViewports_h
 
-#include "public/platform/WebContentDecryptionModuleSession.h"
+#include "core/platform/graphics/GraphicsLayerClient.h"
+#include "core/platform/graphics/IntSize.h"
+#include "public/platform/WebScrollbar.h"
+#include "public/platform/WebSize.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/PassOwnPtr.h"
-#include "wtf/text/WTFString.h"
+
+namespace WebCore {
+class GraphicsContext;
+class GraphicsLayer;
+class IntRect;
+class IntSize;
+}
 
 namespace WebKit {
-class WebContentDecryptionModule;
-}
 
-namespace WTF {
-class Uint8Array;
-}
+class WebLayerTreeView;
+class WebScrollbarLayer;
+class WebViewImpl;
 
-namespace WebCore {
+class PinchViewports : WebCore::GraphicsLayerClient {
+public:
+    static PassOwnPtr<PinchViewports> create(WebViewImpl* owner);
+    ~PinchViewports();
 
-class KURL;
+    void setOverflowControlsHostLayer(WebCore::GraphicsLayer*);
+    WebCore::GraphicsLayer* rootGraphicsLayer()
+    {
+        return m_innerViewportClipLayer.get();
+    }
+    void setViewportSize(const WebCore::IntSize&);
 
-class ContentDecryptionModuleSessionClient {
-public:
-    enum MediaKeyErrorCode { UnknownError = 1, ClientError };
-    virtual void keyAdded() = 0;
-    virtual void keyError(MediaKeyErrorCode, unsigned long systemCode) = 0;
-    virtual void keyMessage(const unsigned char* message, size_t messageLength, const KURL& destinationURL) = 0;
+    void registerViewportLayersWithTreeView(WebLayerTreeView*) const;
+    void clearViewportLayersForTreeView(WebLayerTreeView*) const;
+
+    // GraphicsLayerClient implementation.
+    virtual void notifyAnimationStarted(const WebCore::GraphicsLayer*, double time) OVERRIDE;
+    virtual void paintContents(const WebCore::GraphicsLayer*, WebCore::GraphicsContext&, WebCore::GraphicsLayerPaintingPhase, const WebCore::IntRect& inClip) OVERRIDE;
+
+private:
+    explicit PinchViewports(WebViewImpl* owner);
+
+    void setupScrollbar(WebKit::WebScrollbar::Orientation);
+
+    WebViewImpl* m_owner;
+    OwnPtr<WebCore::GraphicsLayer> m_innerViewportClipLayer;
+    OwnPtr<WebCore::GraphicsLayer> m_pageScaleLayer;
+    OwnPtr<WebCore::GraphicsLayer> m_innerViewportScrollLayer;
+    OwnPtr<WebCore::GraphicsLayer> m_overlayScrollbarHorizontal;
+    OwnPtr<WebCore::GraphicsLayer> m_overlayScrollbarVertical;
 };
 
-class ContentDecryptionModuleSession : private WebKit::WebContentDecryptionModuleSession::Client {
-public:
-    static PassOwnPtr<ContentDecryptionModuleSession> create(ContentDecryptionModuleSessionClient*);
+} // namespace WebKit
 
-    ContentDecryptionModuleSession(WebKit::WebContentDecryptionModule*, ContentDecryptionModuleSessionClient*);
-    ~ContentDecryptionModuleSession();
-
-    String sessionId() const;
-    void generateKeyRequest(const String& mimeType, const WTF::Uint8Array& initData);
-    void update(const WTF::Uint8Array& key);
-    void close();
-
-private:
-    // WebKit::WebContentDecryptionModuleSession::Client
-    virtual void keyAdded() OVERRIDE;
-    virtual void keyError(MediaKeyErrorCode, unsigned long systemCode) OVERRIDE;
-    virtual void keyMessage(const unsigned char* message, size_t messageLength, const WebKit::WebURL& destinationURL) OVERRIDE;
-
-    OwnPtr<WebKit::WebContentDecryptionModuleSession> m_session;
-
-    ContentDecryptionModuleSessionClient* m_client;
-};
-
-} // namespace WebCore
-
-#endif // ContentDecryptionModuleSession_h
+#endif // PinchViewports_h