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
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
|
/*
* Copyright (C) 2010 Alex Milowski (alex@milowski.com). All rights reserved.
* Copyright (C) 2012 David Barton (dbarton@mathscribe.com). All rights reserved.
*
* 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 "MathMLElement.h"
#include "MathMLStyle.h"
#include "RenderBlock.h"
#include "RenderTable.h"
namespace WebCore {
class RenderMathMLOperator;
class MathMLPresentationElement;
class RenderMathMLBlock : public RenderBlock {
WTF_MAKE_TZONE_OR_ISO_ALLOCATED(RenderMathMLBlock);
WTF_OVERRIDE_DELETE_FOR_CHECKED_PTR(RenderMathMLBlock);
public:
RenderMathMLBlock(Type, MathMLPresentationElement&, RenderStyle&&);
RenderMathMLBlock(Type, Document&, RenderStyle&&);
virtual ~RenderMathMLBlock();
MathMLStyle& mathMLStyle() const { return m_mathMLStyle; }
bool isChildAllowed(const RenderObject&, const RenderStyle&) const override;
// MathML defines an "embellished operator" as roughly an <mo> that may have subscripts,
// superscripts, underscripts, overscripts, or a denominator (as in d/dx, where "d" is some
// differential operator). The padding, precedence, and stretchiness of the base <mo> should
// apply to the embellished operator as a whole. unembellishedOperator() checks for being an
// embellished operator, and omits any embellishments.
// FIXME: We don't yet handle all the cases in the MathML spec. See
// https://bugs.webkit.org/show_bug.cgi?id=78617.
virtual RenderMathMLOperator* unembellishedOperator() const { return nullptr; }
LayoutUnit baselinePosition(FontBaseline, bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const override;
protected:
void styleDidChange(StyleDifference, const RenderStyle* oldStyle) override;
inline LayoutUnit ruleThicknessFallback() const;
LayoutUnit mathAxisHeight() const;
LayoutUnit mirrorIfNeeded(LayoutUnit horizontalOffset, LayoutUnit boxWidth = 0_lu) const;
inline LayoutUnit mirrorIfNeeded(LayoutUnit horizontalOffset, const RenderBox& child) const;
static inline LayoutUnit ascentForChild(const RenderBox& child);
void layoutBlock(RelayoutChildren, LayoutUnit pageLogicalHeight = 0_lu) override;
void computeAndSetBlockDirectionMarginsOfChildren();
void insertPositionedChildrenIntoContainingBlock();
void layoutFloatingChildren();
void shiftInFlowChildren(LayoutUnit left, LayoutUnit top);
void adjustPreferredLogicalWidthsForBorderAndPadding();
void adjustLayoutForBorderAndPadding();
enum class LayoutPhase : uint8_t {
CalculatePreferredLogicalWidth,
Layout,
};
struct SizeAppliedToMathContent {
std::optional<LayoutUnit> logicalWidth;
std::optional<LayoutUnit> logicalHeight;
};
// Retrieve the specified (and supported) CSS width/height to apply to math
// content box, if any.
SizeAppliedToMathContent sizeAppliedToMathContent(LayoutPhase);
// Whether math content should be centered on the inline axis if a different size is specified by the user.
virtual bool isMathContentCentered() const { return false; }
// Apply the specified CSS width/height to the math content box and return inline shift for further adjustments.
LayoutUnit applySizeToMathContent(LayoutPhase, const SizeAppliedToMathContent&);
private:
bool isRenderMathMLBlock() const final { return true; }
ASCIILiteral renderName() const override { return "RenderMathMLBlock"_s; }
bool canDropAnonymousBlockChild() const final { return false; }
void layoutItems(RelayoutChildren);
Ref<MathMLStyle> m_mathMLStyle;
};
class RenderMathMLTable final : public RenderTable {
WTF_MAKE_TZONE_OR_ISO_ALLOCATED(RenderMathMLTable);
WTF_OVERRIDE_DELETE_FOR_CHECKED_PTR(RenderMathMLTable);
public:
inline RenderMathMLTable(MathMLElement&, RenderStyle&&);
virtual ~RenderMathMLTable();
MathMLStyle& mathMLStyle() const { return m_mathMLStyle; }
private:
ASCIILiteral renderName() const final { return "RenderMathMLTable"_s; }
std::optional<LayoutUnit> firstLineBaseline() const final;
Ref<MathMLStyle> m_mathMLStyle;
};
LayoutUnit toUserUnits(const MathMLElement::Length&, const RenderStyle&, const LayoutUnit& referenceValue);
} // namespace WebCore
SPECIALIZE_TYPE_TRAITS_RENDER_OBJECT(RenderMathMLBlock, isRenderMathMLBlock())
SPECIALIZE_TYPE_TRAITS_RENDER_OBJECT(RenderMathMLTable, isRenderMathMLTable())
#endif // ENABLE(MATHML)
|
