1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
|
/*
* Copyright (C) 2009 Alex Milowski (alex@milowski.com). All rights reserved.
* Copyright (C) 2016 Igalia S.L.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#if ENABLE(MATHML)
#include "MathOperator.h"
#include "RenderMathMLRow.h"
namespace WebCore {
class MathMLRootElement;
enum class RootType { SquareRoot, RootWithIndex };
// Render base^(1/index), or sqrt(base) using radical notation.
class RenderMathMLRoot final : public RenderMathMLRow {
WTF_MAKE_TZONE_OR_ISO_ALLOCATED(RenderMathMLRoot);
WTF_OVERRIDE_DELETE_FOR_CHECKED_PTR(RenderMathMLRoot);
public:
RenderMathMLRoot(MathMLRootElement&, RenderStyle&&);
virtual ~RenderMathMLRoot();
void updateStyle();
private:
bool isValid() const;
RenderBox& getBase() const;
RenderBox& getIndex() const;
ASCIILiteral renderName() const final { return "RenderMathMLRoot"_s; }
MathMLRootElement& element() const;
RootType rootType() const;
void styleDidChange(StyleDifference, const RenderStyle* oldStyle) final;
void computePreferredLogicalWidths() final;
void layoutBlock(RelayoutChildren, LayoutUnit pageLogicalHeight = 0_lu) final;
void paint(PaintInfo&, const LayoutPoint&) final;
struct HorizontalParameters {
LayoutUnit kernBeforeDegree;
LayoutUnit kernAfterDegree;
};
HorizontalParameters horizontalParameters(LayoutUnit indexWidth);
struct VerticalParameters {
LayoutUnit verticalGap;
LayoutUnit ruleThickness;
LayoutUnit extraAscender;
float degreeBottomRaisePercent;
};
VerticalParameters verticalParameters();
MathOperator m_radicalOperator;
LayoutUnit m_radicalOperatorTop;
LayoutUnit m_baseWidth;
bool isRenderMathMLSquareRoot() const final { return rootType() == RootType::SquareRoot; }
};
} // namespace WebCore
SPECIALIZE_TYPE_TRAITS_RENDER_OBJECT(RenderMathMLRoot, isRenderMathMLRoot())
#endif // ENABLE(MATHML)
|
