1 /*

     2  * Copyright (C) 2010 Alex Milowski (alex@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 RenderMathMLOperator_h

    27 #define RenderMathMLOperator_h

    28 

    29 #if ENABLE(MATHML)

    30 

    31 #include "RenderMathMLBlock.h"

    32 

    33 namespace WebCore {

    34     

    35 class RenderMathMLOperator : public RenderMathMLBlock {

    36 public:

    37     RenderMathMLOperator(Node* container);

    38     RenderMathMLOperator(Node* container, UChar operatorChar);

    39     virtual bool isRenderMathMLOperator() const { return true; }

    40     virtual void stretchToHeight(int pixelHeight);

    41     virtual void updateFromElement(); 

    42     virtual bool isChildAllowed(RenderObject*, RenderStyle*) const;

    43     virtual int baselinePosition(bool , bool) const;    

    44     

    45 protected:

    46     virtual void layout();

    47     virtual RefPtr<RenderStyle> createStackableStyle(int size, int topRelative);

    48     virtual RenderBlock* createGlyph(UChar glyph, int size = 0, int charRelative = 0, int topRelative = 0);

    49     

    50 private:

    51     int m_stretchHeight;

    52     bool m_isStacked;

    53     bool m_isCentered;

    54     UChar m_operator;

    55 };

    56 

    57 inline RenderMathMLOperator* toRenderMathMLOperator(RenderMathMLBlock* block)

    58 { 

    59     ASSERT(!block || block->isRenderMathMLOperator());

    60     return static_cast<RenderMathMLOperator*>(block);

    61 }

    62 

    63 inline const RenderMathMLOperator* toRenderMathMLOperator(const RenderMathMLBlock* block)

    64 { 

    65     ASSERT(!block || block->isRenderMathMLOperator());

    66     return static_cast<const RenderMathMLOperator*>(block);

    67 }

    68     

    69 }

    70 

    71 

    72 #endif // ENABLE(MATHML)

    73 #endif // RenderMathMLOperator_h