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      1 /*
      2  * Copyright (C) 2011 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  * 1. Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *
     11  * 2. Redistributions in binary form must reproduce the above
     12  * copyright notice, this list of conditions and the following disclaimer
     13  * in the documentation and/or other materials provided with the
     14  * distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY GOOGLE INC. AND ITS CONTRIBUTORS
     17  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     18  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     19  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GOOGLE INC.
     20  * OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     21  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     22  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     26  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #ifndef PageOverlay_h
     30 #define PageOverlay_h
     31 
     32 #include "wtf/OwnPtr.h"
     33 #include "wtf/PassOwnPtr.h"
     34 
     35 namespace WebCore {
     36 class GraphicsContext;
     37 class GraphicsLayer;
     38 class GraphicsLayerClient;
     39 }
     40 
     41 namespace WebKit {
     42 class WebPageOverlay;
     43 class WebViewImpl;
     44 struct WebRect;
     45 
     46 class PageOverlay {
     47 public:
     48     static PassOwnPtr<PageOverlay> create(WebViewImpl*, WebPageOverlay*);
     49 
     50     ~PageOverlay() { }
     51 
     52     WebPageOverlay* overlay() const { return m_overlay; }
     53     void setOverlay(WebPageOverlay* overlay) { m_overlay = overlay; }
     54 
     55     int zOrder() const { return m_zOrder; }
     56     void setZOrder(int zOrder) { m_zOrder = zOrder; }
     57 
     58     void clear();
     59     void update();
     60     void paintWebFrame(WebCore::GraphicsContext&);
     61 
     62     WebCore::GraphicsLayer* graphicsLayer() const { return m_layer.get(); }
     63 
     64 private:
     65     PageOverlay(WebViewImpl*, WebPageOverlay*);
     66     void invalidateWebFrame();
     67 
     68     WebViewImpl* m_viewImpl;
     69     WebPageOverlay* m_overlay;
     70     OwnPtr<WebCore::GraphicsLayerClient> m_layerClient;
     71     OwnPtr<WebCore::GraphicsLayer> m_layer;
     72     int m_zOrder;
     73 };
     74 
     75 } // namespace WebKit
     76 
     77 #endif // PageOverlay_h
     78