blob: b0e5bdd9528da392e76b0ea0451c46ad628b1225 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
#pragma once
#include <AK/Badge.h>
#include <AK/RefPtr.h>
#include <AK/String.h>
#include <AK/Vector.h>
#include <LibHTML/TreeNode.h>
enum class NodeType : unsigned {
INVALID = 0,
ELEMENT_NODE = 1,
TEXT_NODE = 3,
COMMENT_NODE = 8,
DOCUMENT_NODE = 9,
DOCUMENT_TYPE_NODE = 10,
DOCUMENT_FRAGMENT_NODE = 11,
};
class Document;
class Element;
class HTMLElement;
class HTMLAnchorElement;
class ParentNode;
class LayoutNode;
class StyleResolver;
class StyleProperties;
class Node : public TreeNode<Node> {
public:
virtual ~Node();
NodeType type() const { return m_type; }
bool is_element() const { return type() == NodeType::ELEMENT_NODE; }
bool is_text() const { return type() == NodeType::TEXT_NODE; }
bool is_document() const { return type() == NodeType::DOCUMENT_NODE; }
bool is_document_type() const { return type() == NodeType::DOCUMENT_TYPE_NODE; }
bool is_comment() const { return type() == NodeType::COMMENT_NODE; }
bool is_character_data() const { return type() == NodeType::TEXT_NODE || type() == NodeType::COMMENT_NODE; }
bool is_document_fragment() const { return type() == NodeType::DOCUMENT_FRAGMENT_NODE; }
bool is_parent_node() const { return is_element() || is_document(); }
virtual RefPtr<LayoutNode> create_layout_node(const StyleProperties* parent_style) const;
virtual String tag_name() const = 0;
virtual String text_content() const;
Document& document() { return m_document; }
const Document& document() const { return m_document; }
const HTMLAnchorElement* enclosing_link_element() const;
const HTMLElement* enclosing_html_element() const;
virtual bool is_html_element() const { return false; }
template<typename T>
const T* first_child_of_type() const;
template<typename T>
const T* first_ancestor_of_type() const;
virtual void inserted_into(Node&) {}
virtual void removed_from(Node&) {}
const LayoutNode* layout_node() const { return m_layout_node; }
LayoutNode* layout_node() { return m_layout_node; }
void set_layout_node(Badge<LayoutNode>, LayoutNode* layout_node) const { m_layout_node = layout_node; }
const Element* previous_element_sibling() const;
const Element* next_element_sibling() const;
virtual bool is_child_allowed(const Node&) const { return true; }
bool needs_style_update() const { return m_needs_style_update; }
void set_needs_style_update(bool value) { m_needs_style_update = value; }
void invalidate_style();
bool is_link() const;
protected:
Node(Document&, NodeType);
Document& m_document;
mutable LayoutNode* m_layout_node { nullptr };
NodeType m_type { NodeType::INVALID };
bool m_needs_style_update { false };
};
template<typename T>
inline bool is(const Node&)
{
return false;
}
template<typename T>
inline bool is(const Node* node)
{
return !node || is<T>(*node);
}
template<>
inline bool is<Node>(const Node&)
{
return true;
}
template<>
inline bool is<ParentNode>(const Node& node)
{
return node.is_parent_node();
}
template<typename T>
inline const T& to(const Node& node)
{
ASSERT(is<T>(node));
return static_cast<const T&>(node);
}
template<typename T>
inline T* to(Node* node)
{
ASSERT(is<T>(node));
return static_cast<T*>(node);
}
template<typename T>
inline const T* to(const Node* node)
{
ASSERT(is<T>(node));
return static_cast<const T*>(node);
}
template<typename T>
inline T& to(Node& node)
{
ASSERT(is<T>(node));
return static_cast<T&>(node);
}
template<typename T>
inline const T* Node::first_child_of_type() const
{
for (auto* child = first_child(); child; child = child->next_sibling()) {
if (is<T>(*child))
return to<T>(child);
}
return nullptr;
}
template<typename T>
inline const T* Node::first_ancestor_of_type() const
{
for (auto* ancestor = parent(); ancestor; ancestor = ancestor->parent()) {
if (is<T>(*ancestor))
return to<T>(ancestor);
}
return nullptr;
}
|
