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      1 /*
      2  * Copyright (C) 2003, 2009, 2012 Apple 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
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. 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 APPLE INC. ``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 APPLE COMPUTER, INC. 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 LayerFragment_h
     27 #define LayerFragment_h
     28 
     29 #include "core/rendering/ClipRect.h"
     30 #include "wtf/Vector.h"
     31 
     32 namespace blink {
     33 
     34 struct LayerFragment {
     35 public:
     36     LayerFragment()
     37         : shouldPaintContent(false)
     38     {
     39     }
     40 
     41     void setRects(const LayoutRect& bounds, const ClipRect& background, const ClipRect& foreground, const ClipRect& outline)
     42     {
     43         layerBounds = bounds;
     44         backgroundRect = background;
     45         foregroundRect = foreground;
     46         outlineRect = outline;
     47     }
     48 
     49     void moveBy(const LayoutPoint& offset)
     50     {
     51         layerBounds.moveBy(offset);
     52         backgroundRect.moveBy(offset);
     53         foregroundRect.moveBy(offset);
     54         outlineRect.moveBy(offset);
     55         paginationClip.moveBy(offset);
     56     }
     57 
     58     void intersect(const LayoutRect& rect)
     59     {
     60         backgroundRect.intersect(rect);
     61         foregroundRect.intersect(rect);
     62         outlineRect.intersect(rect);
     63     }
     64 
     65     bool shouldPaintContent;
     66     LayoutRect layerBounds;
     67     ClipRect backgroundRect;
     68     ClipRect foregroundRect;
     69     ClipRect outlineRect;
     70 
     71     // Unique to paginated fragments. The physical translation to apply to shift the layer when painting/hit-testing.
     72     LayoutPoint paginationOffset;
     73 
     74     // Also unique to paginated fragments. An additional clip that applies to the layer. It is in layer-local
     75     // (physical) coordinates.
     76     LayoutRect paginationClip;
     77 };
     78 
     79 typedef Vector<LayerFragment, 1> LayerFragments;
     80 
     81 } // namespace blink
     82 
     83 #endif // LayerFragment_h
     84