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 RenderMathMLOperator_h 27 #define RenderMathMLOperator_h 28 29 #if ENABLE(MATHML) 30 31 #include "RenderMathMLBlock.h" 32 #include <wtf/unicode/CharacterNames.h> 33 34 namespace WebCore { 35 36 class RenderMathMLOperator : public RenderMathMLBlock { 37 public: 38 RenderMathMLOperator(Node* container); 39 RenderMathMLOperator(Node* container, UChar operatorChar); 40 virtual bool isRenderMathMLOperator() const { return true; } 41 virtual void stretchToHeight(int pixelHeight); 42 virtual void updateFromElement(); 43 virtual bool isChildAllowed(RenderObject*, RenderStyle*) const; 44 virtual int baselinePosition(FontBaseline, bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const; 45 46 protected: 47 virtual void layout(); 48 virtual RefPtr<RenderStyle> createStackableStyle(int size, int topRelative); 49 virtual RenderBlock* createGlyph(UChar glyph, int size = 0, int charRelative = 0, int topRelative = 0); 50 51 private: 52 int m_stretchHeight; 53 bool m_isStacked; 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 inline UChar convertHyphenMinusToMinusSign(UChar glyph) 70 { 71 // When rendered as a mathematical operator, minus glyph should be larger. 72 if (glyph == hyphenMinus) 73 return minusSign; 74 75 return glyph; 76 } 77 78 } 79 80 #endif // ENABLE(MATHML) 81 #endif // RenderMathMLOperator_h 82