1/*
2 * Copyright (C) 2013 Google Inc. All rights reserved.
3 * Copyright (C) 2016 Apple Inc. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met:
8 *
9 * * Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * * Redistributions in binary form must reproduce the above
12 * copyright notice, this list of conditions and the following disclaimer
13 * in the documentation and/or other materials provided with the
14 * distribution.
15 * * Neither the name of Google Inc. nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#pragma once
33
34#include "CSSValueKeywords.h"
35#include "Color.h"
36#include <wtf/OptionSet.h>
37
38namespace WebCore {
39
40class StyleColor {
41public:
42 StyleColor()
43 : m_currentColor(true) { }
44 StyleColor(Color color)
45 : m_color(color)
46 , m_currentColor(false) { }
47 static StyleColor currentColor() { return StyleColor(); }
48
49 bool isCurrentColor() const { return m_currentColor; }
50 const Color& getColor() const { ASSERT(!isCurrentColor()); return m_color; }
51
52 const Color& resolve(const Color& currentColor) const { return m_currentColor ? currentColor : m_color; }
53
54 enum class Options : uint8_t {
55 ForVisitedLink = 1 << 0,
56 UseSystemAppearance = 1 << 1,
57 UseDarkAppearance = 1 << 2,
58 UseInactiveAppearance = 1 << 3
59 };
60
61 static Color colorFromKeyword(CSSValueID, OptionSet<Options>);
62 static bool isColorKeyword(CSSValueID);
63 static bool isSystemColor(CSSValueID);
64
65private:
66 Color m_color;
67 bool m_currentColor;
68};
69
70inline bool operator==(const StyleColor& a, const StyleColor& b)
71{
72 if (a.isCurrentColor() || b.isCurrentColor())
73 return a.isCurrentColor() && b.isCurrentColor();
74 return a.getColor() == b.getColor();
75}
76
77inline bool operator!=(const StyleColor& a, const StyleColor& b)
78{
79 return !(a == b);
80}
81
82
83} // namespace WebCore
84