1/*
2 * (C) 1999-2003 Lars Knoll (knoll@kde.org)
3 * Copyright (C) 2004, 2005, 2006, 2015 Apple Inc.
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
14 *
15 * You should have received a copy of the GNU Library General Public License
16 * along with this library; see the file COPYING.LIB. If not, write to
17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
19 */
20
21#pragma once
22
23#include <wtf/RefCounted.h>
24
25namespace WebCore {
26
27class CSSPrimitiveValue;
28
29// A primitive value representing a pair. This is useful for properties like border-radius, background-size/position,
30// and border-spacing (all of which are space-separated sets of two values). At the moment we are only using it for
31// border-radius and background-size, but (FIXME) border-spacing and background-position could be converted over to use
32// it (eliminating some extra -webkit- internal properties).
33class Pair : public RefCounted<Pair> {
34public:
35 enum class IdenticalValueEncoding : uint8_t {
36 DoNotCoalesce,
37 Coalesce
38 };
39
40 static Ref<Pair> create(RefPtr<CSSPrimitiveValue>&& first, RefPtr<CSSPrimitiveValue>&& second)
41 {
42 return adoptRef(*new Pair(WTFMove(first), WTFMove(second)));
43 }
44 static Ref<Pair> create(RefPtr<CSSPrimitiveValue>&& first, RefPtr<CSSPrimitiveValue>&& second, IdenticalValueEncoding encoding)
45 {
46 return adoptRef(*new Pair(WTFMove(first), WTFMove(second), encoding));
47 }
48 CSSPrimitiveValue* first() const { return m_first.get(); }
49 CSSPrimitiveValue* second() const { return m_second.get(); }
50
51 String cssText() const
52 {
53 String first = this->first()->cssText();
54 String second = this->second()->cssText();
55 if (m_encoding == IdenticalValueEncoding::Coalesce && first == second)
56 return first;
57 return first + ' ' + second;
58 }
59
60 bool equals(const Pair& other) const { return compareCSSValuePtr(m_first, other.m_first) && compareCSSValuePtr(m_second, other.m_second); }
61
62private:
63 Pair(RefPtr<CSSPrimitiveValue>&& first, RefPtr<CSSPrimitiveValue>&& second)
64 : m_first(WTFMove(first))
65 , m_second(WTFMove(second))
66 { }
67
68 Pair(RefPtr<CSSPrimitiveValue>&& first, RefPtr<CSSPrimitiveValue>&& second, IdenticalValueEncoding encoding)
69 : m_encoding(encoding)
70 , m_first(WTFMove(first))
71 , m_second(WTFMove(second))
72 { }
73
74 IdenticalValueEncoding m_encoding { IdenticalValueEncoding::Coalesce };
75 RefPtr<CSSPrimitiveValue> m_first;
76 RefPtr<CSSPrimitiveValue> m_second;
77};
78
79} // namespace
80