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      1 /*
      2  * Copyright (C) 2010 Alex Milowski (alex (at) milowski.com). 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 THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     14  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     15  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     16  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     17  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     18  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     19  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     20  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     21  * THEORY 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 RenderMathMLBlock_h
     27 #define RenderMathMLBlock_h
     28 
     29 #if ENABLE(MATHML)
     30 
     31 #include "RenderBlock.h"
     32 
     33 #define ENABLE_DEBUG_MATH_LAYOUT 0
     34 
     35 namespace WebCore {
     36 
     37 class RenderMathMLBlock : public RenderBlock {
     38 public:
     39     RenderMathMLBlock(Node* container);
     40     virtual bool isChildAllowed(RenderObject*, RenderStyle*) const;
     41 
     42     virtual bool isRenderMathMLBlock() const { return true; }
     43     virtual bool isRenderMathMLOperator() const { return false; }
     44     virtual bool isRenderMathMLRow() const { return false; }
     45     virtual bool isRenderMathMLMath() const { return false; }
     46     virtual bool hasBase() const { return false; }
     47     virtual int nonOperatorHeight() const;
     48     virtual void stretchToHeight(int height);
     49 
     50 #if ENABLE(DEBUG_MATH_LAYOUT)
     51     virtual void paint(PaintInfo&, int tx, int ty);
     52 #endif
     53 
     54 protected:
     55     int getBoxModelObjectHeight(RenderObject* object)
     56     {
     57         if (object && object->isBoxModelObject()) {
     58             RenderBoxModelObject* box = toRenderBoxModelObject(object);
     59             return box->offsetHeight();
     60         }
     61 
     62         return 0;
     63     }
     64     int getBoxModelObjectHeight(const RenderObject* object)
     65     {
     66         if (object && object->isBoxModelObject()) {
     67             const RenderBoxModelObject* box = toRenderBoxModelObject(object);
     68             return box->offsetHeight();
     69         }
     70 
     71         return 0;
     72     }
     73     int getBoxModelObjectWidth(RenderObject* object)
     74     {
     75         if (object && object->isBoxModelObject()) {
     76             RenderBoxModelObject* box = toRenderBoxModelObject(object);
     77             return box->offsetWidth();
     78         }
     79 
     80         return 0;
     81     }
     82     int getBoxModelObjectWidth(const RenderObject* object)
     83     {
     84         if (object && object->isBoxModelObject()) {
     85             const RenderBoxModelObject* box = toRenderBoxModelObject(object);
     86             return box->offsetWidth();
     87         }
     88 
     89         return 0;
     90     }
     91     virtual PassRefPtr<RenderStyle> makeBlockStyle();
     92 
     93 };
     94 
     95 inline RenderMathMLBlock* toRenderMathMLBlock(RenderObject* object)
     96 {
     97     ASSERT(!object || object->isRenderMathMLBlock());
     98     return static_cast<RenderMathMLBlock*>(object);
     99 }
    100 
    101 inline const RenderMathMLBlock* toRenderMathMLBlock(const RenderObject* object)
    102 {
    103     ASSERT(!object || object->isRenderMathMLBlock());
    104     return static_cast<const RenderMathMLBlock*>(object);
    105 }
    106 
    107 }
    108 
    109 
    110 #endif // ENABLE(MATHML)
    111 #endif // RenderMathMLBlock_h
    112