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Serenity Operating System
1/*
2 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
3 * 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 met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this
9 * list of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
22 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#pragma once
28
29#include <AK/FlyString.h>
30#include <AK/Vector.h>
31#include <LibWeb/CSS/Specificity.h>
32
33namespace Web {
34
35class Selector {
36public:
37 struct SimpleSelector {
38 enum class Type {
39 Invalid,
40 Universal,
41 TagName,
42 Id,
43 Class,
44 };
45 Type type { Type::Invalid };
46
47 enum class PseudoClass {
48 None,
49 Link,
50 Hover,
51 FirstChild,
52 LastChild,
53 OnlyChild,
54 Empty,
55 };
56 PseudoClass pseudo_class { PseudoClass::None };
57
58 FlyString value;
59
60 enum class AttributeMatchType {
61 None,
62 HasAttribute,
63 ExactValueMatch,
64 };
65
66 AttributeMatchType attribute_match_type { AttributeMatchType::None };
67 FlyString attribute_name;
68 String attribute_value;
69 };
70
71 struct ComplexSelector {
72 enum class Relation {
73 None,
74 ImmediateChild,
75 Descendant,
76 AdjacentSibling,
77 GeneralSibling,
78 };
79 Relation relation { Relation::None };
80
81 using CompoundSelector = Vector<SimpleSelector>;
82 CompoundSelector compound_selector;
83 };
84
85 explicit Selector(Vector<ComplexSelector>&&);
86 ~Selector();
87
88 const Vector<ComplexSelector>& complex_selectors() const { return m_complex_selectors; }
89
90 Specificity specificity() const;
91
92private:
93 Vector<ComplexSelector> m_complex_selectors;
94};
95
96}