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      1 /*
      2  * Copyright (C) 2009 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  *
      8  * 1.  Redistributions of source code must retain the above copyright
      9  *     notice, this list of conditions and the following disclaimer.
     10  * 2.  Redistributions in binary form must reproduce the above copyright
     11  *     notice, this list of conditions and the following disclaimer in the
     12  *     documentation and/or other materials provided with the distribution.
     13  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
     14  *     its contributors may be used to endorse or promote products derived
     15  *     from this software without specific prior written permission.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
     18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     20  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 
     30 #ifndef RenderLineBoxList_h
     31 #define RenderLineBoxList_h
     32 
     33 #include "core/rendering/RenderObject.h"
     34 
     35 namespace blink {
     36 
     37 class RenderLineBoxList {
     38 public:
     39     RenderLineBoxList()
     40         : m_firstLineBox(0)
     41         , m_lastLineBox(0)
     42     {
     43     }
     44 
     45 #if ENABLE(ASSERT)
     46     ~RenderLineBoxList();
     47 #endif
     48 
     49     InlineFlowBox* firstLineBox() const { return m_firstLineBox; }
     50     InlineFlowBox* lastLineBox() const { return m_lastLineBox; }
     51 
     52     void checkConsistency() const;
     53 
     54     void appendLineBox(InlineFlowBox*);
     55 
     56     void deleteLineBoxTree();
     57     void deleteLineBoxes();
     58 
     59     void extractLineBox(InlineFlowBox*);
     60     void attachLineBox(InlineFlowBox*);
     61     void removeLineBox(InlineFlowBox*);
     62 
     63     void dirtyLineBoxes();
     64     void dirtyLinesFromChangedChild(RenderObject* parent, RenderObject* child);
     65 
     66     bool hitTest(RenderBoxModelObject*, const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction) const;
     67     bool anyLineIntersectsRect(RenderBoxModelObject*, const LayoutRect&, const LayoutPoint&) const;
     68     bool lineIntersectsDirtyRect(RenderBoxModelObject*, InlineFlowBox*, const PaintInfo&, const LayoutPoint&) const;
     69     bool rangeIntersectsRect(RenderBoxModelObject*, LayoutUnit logicalTop, LayoutUnit logicalBottom, const LayoutRect&, const LayoutPoint&) const;
     70 
     71 private:
     72 
     73     // For block flows, each box represents the root inline box for a line in the
     74     // paragraph.
     75     // For inline flows, each box represents a portion of that inline.
     76     InlineFlowBox* m_firstLineBox;
     77     InlineFlowBox* m_lastLineBox;
     78 };
     79 
     80 
     81 #if !ENABLE(ASSERT)
     82 inline void RenderLineBoxList::checkConsistency() const
     83 {
     84 }
     85 #endif
     86 
     87 } // namespace blink
     88 
     89 #endif // RenderFlow_h
     90