72 lines
1.8 KiB
Dart
72 lines
1.8 KiB
Dart
import 'package:collection/collection.dart';
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/// Shorthand function to generate a new [Node].
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Node h(String tagName,
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[Map<String, dynamic> attributes = const {},
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Iterable<Node> children = const []]) =>
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Node(tagName, attributes, children);
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/// Represents an HTML node.
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class Node {
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final String tagName;
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final Map<String, dynamic> attributes = {};
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final List<Node> children = [];
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Node(this.tagName,
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[Map<String, dynamic> attributes = const {},
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Iterable<Node> children = const []]) {
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this
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..attributes.addAll(attributes)
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..children.addAll(children);
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}
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Node._selfClosing(this.tagName,
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[Map<String, dynamic> attributes = const {}]) {
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this.attributes.addAll(attributes);
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}
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@override
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bool operator ==(other) {
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return other is Node &&
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other.tagName == tagName &&
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const ListEquality<Node>().equals(other.children, children) &&
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const MapEquality<String, dynamic>()
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.equals(other.attributes, attributes);
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}
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@override
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int get hashCode {
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int hash = Object.hash(tagName, Object.hashAll(children));
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return Object.hash(hash, Object.hashAll(attributes.values));
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}
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}
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/// Represents a self-closing tag, i.e. `<br>`.
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class SelfClosingNode extends Node {
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/*
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@override
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final String tagName;
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@override
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final Map<String, dynamic> attributes = {};
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*/
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@override
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List<Node> get children => List<Node>.unmodifiable([]);
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SelfClosingNode(tagName, [Map<String, dynamic> attributes = const {}])
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: super._selfClosing(tagName, attributes);
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}
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/// Represents a text node.
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class TextNode extends Node {
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final String text;
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TextNode(this.text) : super(':text');
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@override
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bool operator ==(other) => other is TextNode && other.text == text;
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@override
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int get hashCode => text.hashCode;
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}
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