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      1 /*
      2  * Copyright 2012, The Android Open Source Project
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  *  * Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  *  * Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #ifndef IFrameContentLayerAndroid_h
     27 #define IFrameContentLayerAndroid_h
     28 
     29 #if USE(ACCELERATED_COMPOSITING)
     30 
     31 #include "ScrollableLayerAndroid.h"
     32 
     33 namespace WebCore {
     34 
     35 class IFrameContentLayerAndroid : public ScrollableLayerAndroid {
     36 
     37 public:
     38     IFrameContentLayerAndroid(RenderLayer* owner)
     39         : ScrollableLayerAndroid(owner) {}
     40     IFrameContentLayerAndroid(const ScrollableLayerAndroid& layer)
     41         : ScrollableLayerAndroid(layer) {}
     42     IFrameContentLayerAndroid(const LayerAndroid& layer)
     43         : ScrollableLayerAndroid(layer) {}
     44     IFrameContentLayerAndroid(const IFrameContentLayerAndroid& layer)
     45         : ScrollableLayerAndroid(layer)
     46         , m_iframeScrollOffset(layer.m_iframeScrollOffset) {}
     47 
     48     virtual ~IFrameContentLayerAndroid() {};
     49 
     50     // isIFrame() return true for compatibility reason (see ViewStateSerializer)
     51     virtual bool isIFrame() const { return true; }
     52     virtual bool isIFrameContent() const { return true; }
     53 
     54     virtual LayerAndroid* copy() const { return new IFrameContentLayerAndroid(*this); }
     55     virtual SubclassType subclassType() const { return LayerAndroid::IFrameContentLayer; }
     56 
     57     // Scrolls to the given position in the layer.
     58     // Returns whether or not any scrolling was required.
     59     virtual bool scrollTo(int x, int y);
     60 
     61     // Fills the rect with the current scroll offset and the maximum scroll offset.
     62     // fLeft   = scrollX
     63     // fTop    = scrollY
     64     // fRight  = maxScrollX
     65     // fBottom = maxScrollY
     66     virtual void getScrollRect(SkIRect*) const;
     67 
     68     void setIFrameScrollOffset(IntPoint offset) { m_iframeScrollOffset = offset; }
     69 
     70 private:
     71     IntPoint m_iframeScrollOffset;
     72 };
     73 
     74 }
     75 
     76 #endif // USE(ACCELERATED_COMPOSITING)
     77 
     78 #endif // IFrameContentLayerAndroid_h
     79