1/*
2 * Copyright (C) 2018 Igalia S.L.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 * * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#pragma once
32
33#include "Length.h"
34
35namespace WTF {
36class TextStream;
37}
38
39namespace WebCore {
40
41// This class wraps the lenght of a gap used by properties column-gap and row-gap.
42// The valid values are "normal" or a non-negative <length-percentage>.
43class GapLength {
44public:
45 GapLength()
46 : m_isNormal(true)
47 {
48 }
49
50 GapLength(const Length& length)
51 : m_isNormal(false)
52 , m_length(length)
53 {
54 }
55
56 bool isNormal() const { return m_isNormal; }
57 const Length& length() const { ASSERT(!m_isNormal); return m_length; }
58
59 bool operator==(const GapLength& o) const
60 {
61 return m_isNormal == o.m_isNormal && m_length == o.m_length;
62 }
63
64private:
65 bool m_isNormal;
66 Length m_length;
67};
68
69WTF::TextStream& operator<<(WTF::TextStream&, const GapLength&);
70
71} // namespace WebCore
72