forked from WebKit/WebKit
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathFlexibleBoxAlgorithm.h
More file actions
96 lines (78 loc) · 3.61 KB
/
Copy pathFlexibleBoxAlgorithm.h
File metadata and controls
96 lines (78 loc) · 3.61 KB
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
/*
* Copyright (C) 2011 Google 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:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* 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
#include "LayoutUnit.h"
#include "RenderStyle.h"
#include <wtf/Forward.h>
#include <wtf/Noncopyable.h>
namespace WebCore {
class RenderBox;
class FlexItem {
public:
FlexItem(RenderBox&, LayoutUnit flexBaseContentSize, LayoutUnit mainAxisBorderAndPadding, LayoutUnit mainAxisMargin, std::pair<LayoutUnit, LayoutUnit> minMaxSizes, bool everHadLayout);
LayoutUnit hypotheticalMainAxisMarginBoxSize() const
{
return hypotheticalMainContentSize + mainAxisBorderAndPadding + mainAxisMargin;
}
LayoutUnit flexBaseMarginBoxSize() const
{
return flexBaseContentSize + mainAxisBorderAndPadding + mainAxisMargin;
}
LayoutUnit flexedMarginBoxSize() const
{
return flexedContentSize + mainAxisBorderAndPadding + mainAxisMargin;
}
LayoutUnit constrainSizeByMinMax(const LayoutUnit) const;
RenderBox& box;
const LayoutUnit flexBaseContentSize;
const LayoutUnit mainAxisBorderAndPadding;
const LayoutUnit mainAxisMargin;
const std::pair<LayoutUnit, LayoutUnit> minMaxSizes;
const LayoutUnit hypotheticalMainContentSize;
LayoutUnit flexedContentSize;
bool frozen { false };
bool everHadLayout { false };
};
class FlexLayoutAlgorithm {
WTF_MAKE_NONCOPYABLE(FlexLayoutAlgorithm);
public:
FlexLayoutAlgorithm(const RenderStyle&, LayoutUnit lineBreakLength, const Vector<FlexItem>& allItems, LayoutUnit gapBetweenItems, LayoutUnit gapBetweenLines);
// The hypothetical main size of an item is the flex base size clamped
// according to its min and max main size properties
bool computeNextFlexLine(size_t& nextIndex, Vector<FlexItem>& lineItems, LayoutUnit& sumFlexBaseSize, double& totalFlexGrow, double& totalFlexShrink, double& totalWeightedFlexShrink, LayoutUnit& sumHypotheticalMainSize);
private:
bool isMultiline() const { return m_style.flexWrap() != FlexWrap::NoWrap; }
const RenderStyle& m_style;
LayoutUnit m_lineBreakLength;
const Vector<FlexItem>& m_allItems;
const LayoutUnit m_gapBetweenItems;
const LayoutUnit m_gapBetweenLines;
};
} // namespace WebCore