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 #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);
isRenderMathMLOperator()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
toRenderMathMLOperator(RenderMathMLBlock * block)57 inline RenderMathMLOperator* toRenderMathMLOperator(RenderMathMLBlock* block)
58 {
59 ASSERT(!block || block->isRenderMathMLOperator());
60 return static_cast<RenderMathMLOperator*>(block);
61 }
62
toRenderMathMLOperator(const RenderMathMLBlock * block)63 inline const RenderMathMLOperator* toRenderMathMLOperator(const RenderMathMLBlock* block)
64 {
65 ASSERT(!block || block->isRenderMathMLOperator());
66 return static_cast<const RenderMathMLOperator*>(block);
67 }
68
convertHyphenMinusToMinusSign(UChar glyph)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