learnpress / vendor / symfony / css-selector / XPath / Extension / NodeExtension.php

NodeExtension.php in LearnPress – WordPress LMS Plugin for Create and Sell Online Courses 4.4.0, at vendor/symfony/css-selector/XPath/Extension/NodeExtension.php

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1	<?php
2
3	/*
4	* This file is part of the Symfony package.
5	*
6	* (c) Fabien Potencier <fabien@symfony.com>
7	*
8	* For the full copyright and license information, please view the LICENSE
9	* file that was distributed with this source code.
10	*/
11
12	namespace Symfony\Component\CssSelector\XPath\Extension;
13
14	use Symfony\Component\CssSelector\Node;
15	use Symfony\Component\CssSelector\XPath\Translator;
16	use Symfony\Component\CssSelector\XPath\XPathExpr;
17
18	/**
19	* XPath expression translator node extension.
20	*
21	* This component is a port of the Python cssselect library,
22	* which is copyright Ian Bicking, @see https://github.com/SimonSapin/cssselect.
23	*
24	* @author Jean-François Simon <jeanfrancois.simon@sensiolabs.com>
25	*
26	* @internal
27	*/
28	class NodeExtension extends AbstractExtension
29	{
30	public const ELEMENT_NAME_IN_LOWER_CASE = 1;
31	public const ATTRIBUTE_NAME_IN_LOWER_CASE = 2;
32	public const ATTRIBUTE_VALUE_IN_LOWER_CASE = 4;
33
34	private int $flags;
35
36	public function __construct(int $flags = 0)
37	{
38	$this->flags = $flags;
39	}
40
41	/**
42	* @return $this
43	*/
44	public function setFlag(int $flag, bool $on): static
45	{
46	if ($on && !$this->hasFlag($flag)) {
47	$this->flags += $flag;
48	}
49
50	if (!$on && $this->hasFlag($flag)) {
51	$this->flags -= $flag;
52	}
53
54	return $this;
55	}
56
57	public function hasFlag(int $flag): bool
58	{
59	return (bool) ($this->flags & $flag);
60	}
61
62	public function getNodeTranslators(): array
63	{
64	return [
65	'Selector' => $this->translateSelector(...),
66	'CombinedSelector' => $this->translateCombinedSelector(...),
67	'Negation' => $this->translateNegation(...),
68	'Function' => $this->translateFunction(...),
69	'Pseudo' => $this->translatePseudo(...),
70	'Attribute' => $this->translateAttribute(...),
71	'Class' => $this->translateClass(...),
72	'Hash' => $this->translateHash(...),
73	'Element' => $this->translateElement(...),
74	];
75	}
76
77	public function translateSelector(Node\SelectorNode $node, Translator $translator): XPathExpr
78	{
79	return $translator->nodeToXPath($node->getTree());
80	}
81
82	public function translateCombinedSelector(Node\CombinedSelectorNode $node, Translator $translator): XPathExpr
83	{
84	return $translator->addCombination($node->getCombinator(), $node->getSelector(), $node->getSubSelector());
85	}
86
87	public function translateNegation(Node\NegationNode $node, Translator $translator): XPathExpr
88	{
89	$xpath = $translator->nodeToXPath($node->getSelector());
90	$subXpath = $translator->nodeToXPath($node->getSubSelector());
91	$subXpath->addNameTest();
92
93	if ($subXpath->getCondition()) {
94	return $xpath->addCondition(\sprintf('not(%s)', $subXpath->getCondition()));
95	}
96
97	return $xpath->addCondition('0');
98	}
99
100	public function translateFunction(Node\FunctionNode $node, Translator $translator): XPathExpr
101	{
102	$xpath = $translator->nodeToXPath($node->getSelector());
103
104	return $translator->addFunction($xpath, $node);
105	}
106
107	public function translatePseudo(Node\PseudoNode $node, Translator $translator): XPathExpr
108	{
109	$xpath = $translator->nodeToXPath($node->getSelector());
110
111	return $translator->addPseudoClass($xpath, $node->getIdentifier());
112	}
113
114	public function translateAttribute(Node\AttributeNode $node, Translator $translator): XPathExpr
115	{
116	$name = $node->getAttribute();
117	$safe = $this->isSafeName($name);
118
119	if ($this->hasFlag(self::ATTRIBUTE_NAME_IN_LOWER_CASE)) {
120	$name = strtolower($name);
121	}
122
123	if ($node->getNamespace()) {
124	$name = \sprintf('%s:%s', $node->getNamespace(), $name);
125	$safe = $safe && $this->isSafeName($node->getNamespace());
126	}
127
128	$attribute = $safe ? '@'.$name : \sprintf('attribute::*[name() = %s]', Translator::getXpathLiteral($name));
129	$value = $node->getValue();
130	$xpath = $translator->nodeToXPath($node->getSelector());
131
132	if ($this->hasFlag(self::ATTRIBUTE_VALUE_IN_LOWER_CASE)) {
133	$value = strtolower($value);
134	}
135
136	return $translator->addAttributeMatching($xpath, $node->getOperator(), $attribute, $value);
137	}
138
139	public function translateClass(Node\ClassNode $node, Translator $translator): XPathExpr
140	{
141	$xpath = $translator->nodeToXPath($node->getSelector());
142
143	return $translator->addAttributeMatching($xpath, '~=', '@class', $node->getName());
144	}
145
146	public function translateHash(Node\HashNode $node, Translator $translator): XPathExpr
147	{
148	$xpath = $translator->nodeToXPath($node->getSelector());
149
150	return $translator->addAttributeMatching($xpath, '=', '@id', $node->getId());
151	}
152
153	public function translateElement(Node\ElementNode $node): XPathExpr
154	{
155	$element = $node->getElement();
156
157	if ($element && $this->hasFlag(self::ELEMENT_NAME_IN_LOWER_CASE)) {
158	$element = strtolower($element);
159	}
160
161	if ($element) {
162	$safe = $this->isSafeName($element);
163	} else {
164	$element = '*';
165	$safe = true;
166	}
167
168	if ($node->getNamespace()) {
169	$element = \sprintf('%s:%s', $node->getNamespace(), $element);
170	$safe = $safe && $this->isSafeName($node->getNamespace());
171	}
172
173	$xpath = new XPathExpr('', $element);
174
175	if (!$safe) {
176	$xpath->addNameTest();
177	}
178
179	return $xpath;
180	}
181
182	public function getName(): string
183	{
184	return 'node';
185	}
186
187	private function isSafeName(string $name): bool
188	{
189	return 0 < preg_match('~^[a-zA-Z_][a-zA-Z0-9_.-]*$~', $name);
190	}
191	}
192