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
|
/*
* Copyright (C) 2013 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.
*/
#ifndef GridLength_h
#define GridLength_h
#include "platform/Length.h"
#include "wtf/Allocator.h"
namespace blink {
// This class wraps the <track-breadth> which can be either a <percentage>,
// <length>, min-content, max-content or <flex>. This class avoids spreading the
// knowledge of <flex> throughout the layout directory by adding an new unit to
// Length.h.
class GridLength {
DISALLOW_NEW();
public:
GridLength(const Length& length)
: m_length(length), m_flex(0), m_type(LengthType) {}
explicit GridLength(double flex) : m_flex(flex), m_type(FlexType) {}
bool isLength() const { return m_type == LengthType; }
bool isFlex() const { return m_type == FlexType; }
const Length& length() const {
ASSERT(isLength());
return m_length;
}
double flex() const {
ASSERT(isFlex());
return m_flex;
}
bool hasPercentage() const {
return m_type == LengthType && m_length.isPercentOrCalc();
}
bool operator==(const GridLength& o) const {
return m_length == o.m_length && m_flex == o.m_flex && m_type == o.m_type;
}
bool isContentSized() const {
return m_type == LengthType &&
(m_length.isAuto() || m_length.isMinContent() ||
m_length.isMaxContent());
}
bool isAuto() const { return m_type == LengthType && m_length.isAuto(); }
private:
// Ideally we would put the 2 following fields in a union, but Length has a
// constructor, a destructor and a copy assignment which isn't allowed.
Length m_length;
double m_flex;
enum GridLengthType { LengthType, FlexType };
GridLengthType m_type;
};
} // namespace blink
#endif // GridLength_h
|
