cf7-grid-layout / assets / simple-html-dom / symfony / css-selector / XPath / Translator.php

Translator.php in Smart Grid-Layout Design for Contact Form 7 4.1.3, at assets/simple-html-dom/symfony/css-selector/XPath/Translator.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;
13
14	use Symfony\Component\CssSelector\Exception\ExpressionErrorException;
15	use Symfony\Component\CssSelector\Node\FunctionNode;
16	use Symfony\Component\CssSelector\Node\NodeInterface;
17	use Symfony\Component\CssSelector\Node\SelectorNode;
18	use Symfony\Component\CssSelector\Parser\Parser;
19	use Symfony\Component\CssSelector\Parser\ParserInterface;
20
21	/**
22	* XPath expression translator interface.
23	*
24	* This component is a port of the Python cssselect library,
25	* which is copyright Ian Bicking, @see https://github.com/SimonSapin/cssselect.
26	*
27	* @author Jean-François Simon <jeanfrancois.simon@sensiolabs.com>
28	*
29	* @internal
30	*/
31	class Translator implements TranslatorInterface
32	{
33	private $mainParser;
34
35	/**
36	* @var ParserInterface[]
37	*/
38	private $shortcutParsers = [];
39
40	/**
41	* @var Extension\ExtensionInterface[]
42	*/
43	private $extensions = [];
44
45	private $nodeTranslators = [];
46	private $combinationTranslators = [];
47	private $functionTranslators = [];
48	private $pseudoClassTranslators = [];
49	private $attributeMatchingTranslators = [];
50
51	public function __construct(ParserInterface $parser = null)
52	{
53	$this->mainParser = $parser ?: new Parser();
54
55	$this
56	->registerExtension(new Extension\NodeExtension())
57	->registerExtension(new Extension\CombinationExtension())
58	->registerExtension(new Extension\FunctionExtension())
59	->registerExtension(new Extension\PseudoClassExtension())
60	->registerExtension(new Extension\AttributeMatchingExtension())
61	;
62	}
63
64	public static function getXpathLiteral(string $element): string
65	{
66	if (false === strpos($element, "'")) {
67	return "'".$element."'";
68	}
69
70	if (false === strpos($element, '"')) {
71	return '"'.$element.'"';
72	}
73
74	$string = $element;
75	$parts = [];
76	while (true) {
77	if (false !== $pos = strpos($string, "'")) {
78	$parts[] = sprintf("'%s'", substr($string, 0, $pos));
79	$parts[] = "\"'\"";
80	$string = substr($string, $pos + 1);
81	} else {
82	$parts[] = "'$string'";
83	break;
84	}
85	}
86
87	return sprintf('concat(%s)', implode(', ', $parts));
88	}
89
90	/**
91	* {@inheritdoc}
92	*/
93	public function cssToXPath(string $cssExpr, string $prefix = 'descendant-or-self::'): string
94	{
95	$selectors = $this->parseSelectors($cssExpr);
96
97	/** @var SelectorNode $selector */
98	foreach ($selectors as $index => $selector) {
99	if (null !== $selector->getPseudoElement()) {
100	throw new ExpressionErrorException('Pseudo-elements are not supported.');
101	}
102
103	$selectors[$index] = $this->selectorToXPath($selector, $prefix);
104	}
105
106	return implode(' \| ', $selectors);
107	}
108
109	/**
110	* {@inheritdoc}
111	*/
112	public function selectorToXPath(SelectorNode $selector, string $prefix = 'descendant-or-self::'): string
113	{
114	return ($prefix ?: '').$this->nodeToXPath($selector);
115	}
116
117	/**
118	* @return $this
119	*/
120	public function registerExtension(Extension\ExtensionInterface $extension): self
121	{
122	$this->extensions[$extension->getName()] = $extension;
123
124	$this->nodeTranslators = array_merge($this->nodeTranslators, $extension->getNodeTranslators());
125	$this->combinationTranslators = array_merge($this->combinationTranslators, $extension->getCombinationTranslators());
126	$this->functionTranslators = array_merge($this->functionTranslators, $extension->getFunctionTranslators());
127	$this->pseudoClassTranslators = array_merge($this->pseudoClassTranslators, $extension->getPseudoClassTranslators());
128	$this->attributeMatchingTranslators = array_merge($this->attributeMatchingTranslators, $extension->getAttributeMatchingTranslators());
129
130	return $this;
131	}
132
133	/**
134	* @throws ExpressionErrorException
135	*/
136	public function getExtension(string $name): Extension\ExtensionInterface
137	{
138	if (!isset($this->extensions[$name])) {
139	throw new ExpressionErrorException(sprintf('Extension "%s" not registered.', $name));
140	}
141
142	return $this->extensions[$name];
143	}
144
145	/**
146	* @return $this
147	*/
148	public function registerParserShortcut(ParserInterface $shortcut): self
149	{
150	$this->shortcutParsers[] = $shortcut;
151
152	return $this;
153	}
154
155	/**
156	* @throws ExpressionErrorException
157	*/
158	public function nodeToXPath(NodeInterface $node): XPathExpr
159	{
160	if (!isset($this->nodeTranslators[$node->getNodeName()])) {
161	throw new ExpressionErrorException(sprintf('Node "%s" not supported.', $node->getNodeName()));
162	}
163
164	return $this->nodeTranslators[$node->getNodeName()]($node, $this);
165	}
166
167	/**
168	* @throws ExpressionErrorException
169	*/
170	public function addCombination(string $combiner, NodeInterface $xpath, NodeInterface $combinedXpath): XPathExpr
171	{
172	if (!isset($this->combinationTranslators[$combiner])) {
173	throw new ExpressionErrorException(sprintf('Combiner "%s" not supported.', $combiner));
174	}
175
176	return $this->combinationTranslators[$combiner]($this->nodeToXPath($xpath), $this->nodeToXPath($combinedXpath));
177	}
178
179	/**
180	* @throws ExpressionErrorException
181	*/
182	public function addFunction(XPathExpr $xpath, FunctionNode $function): XPathExpr
183	{
184	if (!isset($this->functionTranslators[$function->getName()])) {
185	throw new ExpressionErrorException(sprintf('Function "%s" not supported.', $function->getName()));
186	}
187
188	return $this->functionTranslators[$function->getName()]($xpath, $function);
189	}
190
191	/**
192	* @throws ExpressionErrorException
193	*/
194	public function addPseudoClass(XPathExpr $xpath, string $pseudoClass): XPathExpr
195	{
196	if (!isset($this->pseudoClassTranslators[$pseudoClass])) {
197	throw new ExpressionErrorException(sprintf('Pseudo-class "%s" not supported.', $pseudoClass));
198	}
199
200	return $this->pseudoClassTranslators[$pseudoClass]($xpath);
201	}
202
203	/**
204	* @throws ExpressionErrorException
205	*/
206	public function addAttributeMatching(XPathExpr $xpath, string $operator, string $attribute, $value): XPathExpr
207	{
208	if (!isset($this->attributeMatchingTranslators[$operator])) {
209	throw new ExpressionErrorException(sprintf('Attribute matcher operator "%s" not supported.', $operator));
210	}
211
212	return $this->attributeMatchingTranslators[$operator]($xpath, $attribute, $value);
213	}
214
215	/**
216	* @return SelectorNode[]
217	*/
218	private function parseSelectors(string $css): array
219	{
220	foreach ($this->shortcutParsers as $shortcut) {
221	$tokens = $shortcut->parse($css);
222
223	if (!empty($tokens)) {
224	return $tokens;
225	}
226	}
227
228	return $this->mainParser->parse($css);
229	}
230	}
231