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      1 /*
      2  * Copyright 2010, 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 CachedLayer_h
     27 #define CachedLayer_h
     28 
     29 #include "CachedDebug.h"
     30 #include "IntRect.h"
     31 
     32 class SkPicture;
     33 
     34 namespace WebCore {
     35     class FloatPoint;
     36     class LayerAndroid;
     37 }
     38 
     39 using namespace WebCore;
     40 
     41 namespace android {
     42 
     43 class CachedLayer {
     44 public:
     45 #if USE(ACCELERATED_COMPOSITING)
     46     bool operator<(const CachedLayer& l) const {
     47         return mCachedNodeIndex < l.mCachedNodeIndex;
     48     }
     49     // FIXME: adjustBounds should be renamed globalBounds or toGlobal
     50     IntRect adjustBounds(const LayerAndroid* root, const IntRect& bounds) const;
     51     int cachedNodeIndex() const { return mCachedNodeIndex; }
     52     FloatPoint getGlobalPosition(const LayerAndroid* ) const;
     53     const LayerAndroid* layer(const LayerAndroid* root) const;
     54     IntRect localBounds(const LayerAndroid* root, const IntRect& bounds) const;
     55     SkPicture* picture(const LayerAndroid* root) const;
     56     void toLocal(const LayerAndroid* root, int* xPtr, int* yPtr) const;
     57     void setCachedNodeIndex(int index) { mCachedNodeIndex = index; }
     58     // Set the global position of the layer.  This is recorded by the nav cache
     59     // and corresponds to RenderLayer::absoluteBoundingBox() which is in
     60     // document coordinates.  This can be different from the global position of
     61     // the layer if the layer is fixed positioned or scrollable.
     62     void setOffset(const IntPoint& offset) { mOffset = offset; }
     63     void setUniqueId(int uniqueId) { mUniqueId = uniqueId; }
     64     int uniqueId() const { return mUniqueId; }
     65 private:
     66     int mCachedNodeIndex;
     67     IntPoint mOffset;
     68     int mUniqueId;
     69 
     70 #if DUMP_NAV_CACHE
     71 public:
     72     class Debug {
     73 public:
     74         CachedLayer* base() const;
     75         void print() const;
     76         static void printLayerAndroid(const LayerAndroid* );
     77         static void printRootLayerAndroid(const LayerAndroid* );
     78         static int spaces;
     79     } mDebug;
     80 #endif
     81 #endif // USE(ACCELERATED_COMPOSITING)
     82 };
     83 
     84 }
     85 
     86 #endif
     87