2 * Copyright (C) 2009 Alex Milowski (alex@milowski.com). All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
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.
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
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23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 #ifndef RenderMathMLRoot_h
27 #define RenderMathMLRoot_h
31 #include "RenderMathMLBlock.h"
32 #include "RenderMathMLRow.h"
36 class RenderMathMLRadicalOperator;
37 class RenderMathMLRootWrapper;
39 // Render base^(1/index), or sqrt(base) via the derived class RenderMathMLSquareRoot, using radical notation.
40 class RenderMathMLRoot : public RenderMathMLBlock {
42 friend class RenderMathMLRootWrapper;
45 RenderMathMLRoot(Element&, PassRef<RenderStyle>);
46 RenderMathMLRoot(Document&, PassRef<RenderStyle>);
48 virtual void addChild(RenderObject* newChild, RenderObject* beforeChild = 0) override;
49 virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle) override;
50 virtual void updateFromElement() override;
53 virtual void layout() override;
55 virtual void paint(PaintInfo&, const LayoutPoint&) override;
58 virtual bool isRenderMathMLRoot() const override final { return true; }
59 virtual const char* renderName() const override { return "RenderMathMLRoot"; }
60 virtual int firstLineBaseline() const override;
62 void restructureWrappers();
64 RenderMathMLRootWrapper* baseWrapper() const;
65 RenderMathMLBlock* radicalWrapper() const;
66 RenderMathMLRootWrapper* indexWrapper() const;
67 RenderMathMLRadicalOperator* radicalOperator() const;
69 LayoutUnit m_verticalGap;
70 LayoutUnit m_ruleThickness;
71 LayoutUnit m_extraAscender;
72 float m_degreeBottomRaisePercent;
75 RENDER_OBJECT_TYPE_CASTS(RenderMathMLRoot, isRenderMathMLRoot())
77 // These are specific wrappers for the index and base, that ask the parent to restructure the renderers after child removal.
78 class RenderMathMLRootWrapper : public RenderMathMLRow {
80 friend class RenderMathMLRoot;
83 RenderMathMLRootWrapper(Document& document, PassRef<RenderStyle> style)
84 : RenderMathMLRow(document, std::move(style)) { }
87 RenderObject* removeChildWithoutRestructuring(RenderObject&);
88 RenderObject* removeChild(RenderObject&) override;
89 static RenderPtr<RenderMathMLRootWrapper> createAnonymousWrapper(RenderMathMLRoot* renderObject);
90 virtual bool isRenderMathMLRootWrapper() const override final { return true; }
91 virtual const char* renderName() const override { return "RenderMathMLRootWrapper"; }
94 RENDER_OBJECT_TYPE_CASTS(RenderMathMLRootWrapper, isRenderMathMLRootWrapper())
98 #endif // ENABLE(MATHML)
100 #endif // RenderMathMLRoot_h