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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/String.h>
30#include <AK/Vector.h>
31#include <LibHTML/CSS/Specificity.h>
32
33class Selector {
34public:
35 struct SimpleSelector {
36 enum class Type {
37 Invalid,
38 Universal,
39 TagName,
40 Id,
41 Class,
42 };
43 Type type { Type::Invalid };
44
45 enum class PseudoClass {
46 None,
47 Link,
48 Hover,
49 FirstChild,
50 LastChild,
51 OnlyChild,
52 Empty,
53 };
54 PseudoClass pseudo_class { PseudoClass::None };
55
56 String value;
57
58 enum class AttributeMatchType {
59 None,
60 HasAttribute,
61 ExactValueMatch,
62 };
63
64 AttributeMatchType attribute_match_type { AttributeMatchType::None };
65 String attribute_name;
66 String attribute_value;
67 };
68
69 struct ComplexSelector {
70 enum class Relation {
71 None,
72 ImmediateChild,
73 Descendant,
74 AdjacentSibling,
75 GeneralSibling,
76 };
77 Relation relation { Relation::None };
78
79 using CompoundSelector = Vector<SimpleSelector>;
80 CompoundSelector compound_selector;
81 };
82
83 explicit Selector(Vector<ComplexSelector>&&);
84 ~Selector();
85
86 const Vector<ComplexSelector>& complex_selectors() const { return m_complex_selectors; }
87
88 Specificity specificity() const;
89
90private:
91 Vector<ComplexSelector> m_complex_selectors;
92};