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 | |
38 | namespace WebCore { |
39 | |
40 | class StyleColor { |
41 | public: |
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 | |
65 | private: |
66 | Color m_color; |
67 | bool m_currentColor; |
68 | }; |
69 | |
70 | inline 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 | |
77 | inline bool operator!=(const StyleColor& a, const StyleColor& b) |
78 | { |
79 | return !(a == b); |
80 | } |
81 | |
82 | |
83 | } // namespace WebCore |
84 | |