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      1 /*
      2  * Copyright (C) 2013 Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions are
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #ifndef PinchViewports_h
     32 #define PinchViewports_h
     33 
     34 #include "core/platform/graphics/GraphicsLayerClient.h"
     35 #include "core/platform/graphics/IntSize.h"
     36 #include "public/platform/WebScrollbar.h"
     37 #include "public/platform/WebSize.h"
     38 #include "wtf/OwnPtr.h"
     39 #include "wtf/PassOwnPtr.h"
     40 
     41 namespace WebCore {
     42 class GraphicsContext;
     43 class GraphicsLayer;
     44 class IntRect;
     45 class IntSize;
     46 }
     47 
     48 namespace WebKit {
     49 
     50 class WebLayerTreeView;
     51 class WebScrollbarLayer;
     52 class WebViewImpl;
     53 
     54 class PinchViewports : WebCore::GraphicsLayerClient {
     55 public:
     56     static PassOwnPtr<PinchViewports> create(WebViewImpl* owner);
     57     ~PinchViewports();
     58 
     59     void setOverflowControlsHostLayer(WebCore::GraphicsLayer*);
     60     WebCore::GraphicsLayer* rootGraphicsLayer()
     61     {
     62         return m_innerViewportContainerLayer.get();
     63     }
     64     void setViewportSize(const WebCore::IntSize&);
     65 
     66     void registerViewportLayersWithTreeView(WebLayerTreeView*) const;
     67     void clearViewportLayersForTreeView(WebLayerTreeView*) const;
     68 
     69     // GraphicsLayerClient implementation.
     70     virtual void notifyAnimationStarted(const WebCore::GraphicsLayer*, double time) OVERRIDE;
     71     virtual void paintContents(const WebCore::GraphicsLayer*, WebCore::GraphicsContext&, WebCore::GraphicsLayerPaintingPhase, const WebCore::IntRect& inClip) OVERRIDE;
     72 
     73 private:
     74     explicit PinchViewports(WebViewImpl* owner);
     75 
     76     void setupScrollbar(WebKit::WebScrollbar::Orientation);
     77 
     78     WebViewImpl* m_owner;
     79     OwnPtr<WebCore::GraphicsLayer> m_innerViewportContainerLayer;
     80     OwnPtr<WebCore::GraphicsLayer> m_pageScaleLayer;
     81     OwnPtr<WebCore::GraphicsLayer> m_innerViewportScrollLayer;
     82     OwnPtr<WebCore::GraphicsLayer> m_overlayScrollbarHorizontal;
     83     OwnPtr<WebCore::GraphicsLayer> m_overlayScrollbarVertical;
     84 };
     85 
     86 } // namespace WebKit
     87 
     88 #endif // PinchViewports_h
     89