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
|
/*
* Copyright (C) 2021 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. ``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
* 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 "FormattingContext.h"
#include "LayoutContainerBox.h"
#if ENABLE(LAYOUT_FORMATTING_CONTEXT)
namespace WebCore {
namespace Layout {
class LayoutContainingBlockChainIterator {
public:
LayoutContainingBlockChainIterator() = default;
LayoutContainingBlockChainIterator(const ContainerBox*);
const ContainerBox& operator*() const { return *m_current; }
const ContainerBox* operator->() const { return m_current; }
LayoutContainingBlockChainIterator& operator++();
bool operator==(const LayoutContainingBlockChainIterator& other) const { return m_current == other.m_current; }
bool operator!=(const LayoutContainingBlockChainIterator& other) const { return !(*this == other); }
private:
const ContainerBox* m_current { nullptr };
};
class LayoutContainingBlockChainIteratorAdapter {
public:
LayoutContainingBlockChainIteratorAdapter(const ContainerBox&, const ContainerBox* stayWithin = nullptr);
auto begin() { return LayoutContainingBlockChainIterator(&m_containingBlock); }
auto end() { return LayoutContainingBlockChainIterator(m_stayWithin); }
private:
const ContainerBox& m_containingBlock;
const ContainerBox* m_stayWithin { nullptr };
};
LayoutContainingBlockChainIteratorAdapter containingBlockChain(const Box&);
LayoutContainingBlockChainIteratorAdapter containingBlockChain(const Box&, const ContainerBox& stayWithin);
LayoutContainingBlockChainIteratorAdapter containingBlockChainWithinFormattingContext(const Box&);
inline LayoutContainingBlockChainIterator::LayoutContainingBlockChainIterator(const ContainerBox* current)
: m_current(current)
{
}
inline LayoutContainingBlockChainIterator& LayoutContainingBlockChainIterator::operator++()
{
ASSERT(m_current);
m_current = m_current->isInitialContainingBlock() ? nullptr : &m_current->containingBlock();
return *this;
}
inline LayoutContainingBlockChainIteratorAdapter::LayoutContainingBlockChainIteratorAdapter(const ContainerBox& containingBlock, const ContainerBox* stayWithin)
: m_containingBlock(containingBlock)
, m_stayWithin(stayWithin)
{
}
inline LayoutContainingBlockChainIteratorAdapter containingBlockChain(const Box& layoutBox)
{
return LayoutContainingBlockChainIteratorAdapter(layoutBox.containingBlock());
}
inline LayoutContainingBlockChainIteratorAdapter containingBlockChain(const Box& layoutBox, const ContainerBox& stayWithin)
{
ASSERT(layoutBox.isDescendantOf(stayWithin));
return LayoutContainingBlockChainIteratorAdapter(layoutBox.containingBlock(), &stayWithin);
}
inline LayoutContainingBlockChainIteratorAdapter containingBlockChainWithinFormattingContext(const Box& layoutBox)
{
return containingBlockChain(layoutBox, layoutBox.formattingContextRoot());
}
}
}
#endif
|
