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
|
/*
* Copyright (C) 2018 Apple Inc. 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 APPLE INC. AND ITS 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 APPLE INC. OR ITS 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
#include "LayoutBox.h"
#include "LayoutUnits.h"
#include <unicode/ubidi.h>
namespace WebCore {
namespace Layout {
class InlineItemsBuilder;
class InlineItem {
public:
enum class Type : uint8_t {
Text,
HardLineBreak,
SoftLineBreak,
WordBreakOpportunity,
AtomicInlineBox,
InlineBoxStart,
InlineBoxEnd,
Float,
Opaque
};
InlineItem(const Box& layoutBox, Type, UBiDiLevel = UBIDI_DEFAULT_LTR);
Type type() const { return m_type; }
static constexpr UBiDiLevel opaqueBidiLevel = 0xff;
UBiDiLevel bidiLevel() const { return m_bidiLevel; }
const Box& layoutBox() const { return *m_layoutBox; }
const RenderStyle& style() const { return layoutBox().style(); }
const RenderStyle& firstLineStyle() const { return layoutBox().firstLineStyle(); }
bool isText() const { return type() == Type::Text; }
bool isAtomicInlineBox() const { return type() == Type::AtomicInlineBox; }
bool isFloat() const { return type() == Type::Float; }
bool isLineBreak() const { return isSoftLineBreak() || isHardLineBreak(); }
bool isWordBreakOpportunity() const { return type() == Type::WordBreakOpportunity; }
bool isSoftLineBreak() const { return type() == Type::SoftLineBreak; }
bool isHardLineBreak() const { return type() == Type::HardLineBreak; }
bool isInlineBoxStart() const { return type() == Type::InlineBoxStart; }
bool isInlineBoxEnd() const { return type() == Type::InlineBoxEnd; }
bool isInlineBoxStartOrEnd() const { return isInlineBoxStart() || isInlineBoxEnd(); }
bool isOpaque() const { return type() == Type::Opaque; }
private:
friend class InlineItemsBuilder;
void setBidiLevel(UBiDiLevel bidiLevel) { m_bidiLevel = bidiLevel; }
void setWidth(InlineLayoutUnit);
const Box* m_layoutBox { nullptr };
protected:
InlineLayoutUnit m_width { };
unsigned m_length { 0 };
// For InlineTextItem and InlineSoftLineBreakItem
unsigned m_startOrPosition { 0 };
private:
UBiDiLevel m_bidiLevel { UBIDI_DEFAULT_LTR };
Type m_type : 4 { };
protected:
// For InlineTextItem
enum class TextItemType : uint8_t { Undefined, Whitespace, NonWhitespace };
TextItemType m_textItemType : 2 { TextItemType::Undefined };
bool m_hasWidth : 1 { false };
bool m_hasTrailingSoftHyphen : 1 { false };
bool m_isWordSeparator : 1 { false };
};
inline InlineItem::InlineItem(const Box& layoutBox, Type type, UBiDiLevel bidiLevel)
: m_layoutBox(&layoutBox)
, m_bidiLevel(bidiLevel)
, m_type(type)
{
}
inline void InlineItem::setWidth(InlineLayoutUnit width)
{
m_width = width;
m_hasWidth = true;
}
using InlineItemList = Vector<InlineItem>;
#define SPECIALIZE_TYPE_TRAITS_INLINE_ITEM(ToValueTypeName, predicate) \
SPECIALIZE_TYPE_TRAITS_BEGIN(WebCore::Layout::ToValueTypeName) \
static bool isType(const WebCore::Layout::InlineItem& inlineItem) { return inlineItem.predicate; } \
SPECIALIZE_TYPE_TRAITS_END()
}
}
namespace WTF {
template<>
struct VectorTraits<WebCore::Layout::InlineItem> : public VectorTraitsBase<false, void> {
static constexpr bool canCopyWithMemcpy = true;
static constexpr bool canMoveWithMemcpy = true;
};
}
|
