1/*
2 * Copyright (C) 2009 Alex Milowski (alex@milowski.com). All rights reserved.
3 * Copyright (C) 2010 François Sausset (sausset@gmail.com). All rights reserved.
4 * Copyright (C) 2016 Igalia S.L.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
18 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
19 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
21 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#pragma once
29
30#if ENABLE(MATHML)
31
32#include "MathMLFractionElement.h"
33#include "RenderMathMLBlock.h"
34
35namespace WebCore {
36
37class MathMLFractionElement;
38
39class RenderMathMLFraction final : public RenderMathMLBlock {
40 WTF_MAKE_ISO_ALLOCATED(RenderMathMLFraction);
41public:
42 RenderMathMLFraction(MathMLFractionElement&, RenderStyle&&);
43
44 LayoutUnit defaultLineThickness() const;
45 LayoutUnit lineThickness() const;
46 float relativeLineThickness() const;
47
48private:
49 bool isRenderMathMLFraction() const final { return true; }
50 const char* renderName() const final { return "RenderMathMLFraction"; }
51
52 void computePreferredLogicalWidths() final;
53 void layoutBlock(bool relayoutChildren, LayoutUnit pageLogicalHeight = 0_lu) final;
54 Optional<int> firstLineBaseline() const final;
55 void paint(PaintInfo&, const LayoutPoint&) final;
56 RenderMathMLOperator* unembellishedOperator() const final;
57
58 MathMLFractionElement& element() const { return static_cast<MathMLFractionElement&>(nodeForNonAnonymous()); }
59
60 bool isValid() const;
61 RenderBox& numerator() const;
62 RenderBox& denominator() const;
63 LayoutUnit horizontalOffset(RenderBox&, MathMLFractionElement::FractionAlignment) const;
64 struct FractionParameters {
65 LayoutUnit numeratorGapMin;
66 LayoutUnit denominatorGapMin;
67 LayoutUnit numeratorMinShiftUp;
68 LayoutUnit denominatorMinShiftDown;
69 };
70 FractionParameters fractionParameters() const;
71 struct StackParameters {
72 LayoutUnit gapMin;
73 LayoutUnit topShiftUp;
74 LayoutUnit bottomShiftDown;
75 };
76 StackParameters stackParameters() const;
77 LayoutUnit ascentOverHorizontalAxis() const;
78};
79
80} // namespace WebCore
81
82SPECIALIZE_TYPE_TRAITS_RENDER_OBJECT(RenderMathMLFraction, isRenderMathMLFraction())
83
84#endif // ENABLE(MATHML)
85