wp-user-avatar
/
third-party
/
vendor
/
symfony
/
css-selector
/
XPath
/
Extension
/
FunctionExtension.php
AbstractExtension.php
2 months ago
AttributeMatchingExtension.php
2 months ago
CombinationExtension.php
2 months ago
ExtensionInterface.php
2 months ago
FunctionExtension.php
2 months ago
HtmlExtension.php
2 months ago
NodeExtension.php
2 months ago
PseudoClassExtension.php
2 months ago
FunctionExtension.php
136 lines
| 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 | namespace ProfilePressVendor\Symfony\Component\CssSelector\XPath\Extension; |
| 12 | |
| 13 | use ProfilePressVendor\Symfony\Component\CssSelector\Exception\ExpressionErrorException; |
| 14 | use ProfilePressVendor\Symfony\Component\CssSelector\Exception\SyntaxErrorException; |
| 15 | use ProfilePressVendor\Symfony\Component\CssSelector\Node\FunctionNode; |
| 16 | use ProfilePressVendor\Symfony\Component\CssSelector\Parser\Parser; |
| 17 | use ProfilePressVendor\Symfony\Component\CssSelector\XPath\Translator; |
| 18 | use ProfilePressVendor\Symfony\Component\CssSelector\XPath\XPathExpr; |
| 19 | /** |
| 20 | * XPath expression translator function extension. |
| 21 | * |
| 22 | * This component is a port of the Python cssselect library, |
| 23 | * which is copyright Ian Bicking, @see https://github.com/SimonSapin/cssselect. |
| 24 | * |
| 25 | * @author Jean-François Simon <jeanfrancois.simon@sensiolabs.com> |
| 26 | * |
| 27 | * @internal |
| 28 | */ |
| 29 | class FunctionExtension extends AbstractExtension |
| 30 | { |
| 31 | /** |
| 32 | * {@inheritdoc} |
| 33 | */ |
| 34 | public function getFunctionTranslators(): array |
| 35 | { |
| 36 | return ['nth-child' => [$this, 'translateNthChild'], 'nth-last-child' => [$this, 'translateNthLastChild'], 'nth-of-type' => [$this, 'translateNthOfType'], 'nth-last-of-type' => [$this, 'translateNthLastOfType'], 'contains' => [$this, 'translateContains'], 'lang' => [$this, 'translateLang']]; |
| 37 | } |
| 38 | /** |
| 39 | * @throws ExpressionErrorException |
| 40 | */ |
| 41 | public function translateNthChild(XPathExpr $xpath, FunctionNode $function, bool $last = \false, bool $addNameTest = \true): XPathExpr |
| 42 | { |
| 43 | try { |
| 44 | [$a, $b] = Parser::parseSeries($function->getArguments()); |
| 45 | } catch (SyntaxErrorException $e) { |
| 46 | throw new ExpressionErrorException(sprintf('Invalid series: "%s".', implode('", "', $function->getArguments())), 0, $e); |
| 47 | } |
| 48 | $xpath->addStarPrefix(); |
| 49 | if ($addNameTest) { |
| 50 | $xpath->addNameTest(); |
| 51 | } |
| 52 | if (0 === $a) { |
| 53 | return $xpath->addCondition('position() = ' . ($last ? 'last() - ' . ($b - 1) : $b)); |
| 54 | } |
| 55 | if ($a < 0) { |
| 56 | if ($b < 1) { |
| 57 | return $xpath->addCondition('false()'); |
| 58 | } |
| 59 | $sign = '<='; |
| 60 | } else { |
| 61 | $sign = '>='; |
| 62 | } |
| 63 | $expr = 'position()'; |
| 64 | if ($last) { |
| 65 | $expr = 'last() - ' . $expr; |
| 66 | --$b; |
| 67 | } |
| 68 | if (0 !== $b) { |
| 69 | $expr .= ' - ' . $b; |
| 70 | } |
| 71 | $conditions = [sprintf('%s %s 0', $expr, $sign)]; |
| 72 | if (1 !== $a && -1 !== $a) { |
| 73 | $conditions[] = sprintf('(%s) mod %d = 0', $expr, $a); |
| 74 | } |
| 75 | return $xpath->addCondition(implode(' and ', $conditions)); |
| 76 | // todo: handle an+b, odd, even |
| 77 | // an+b means every-a, plus b, e.g., 2n+1 means odd |
| 78 | // 0n+b means b |
| 79 | // n+0 means a=1, i.e., all elements |
| 80 | // an means every a elements, i.e., 2n means even |
| 81 | // -n means -1n |
| 82 | // -1n+6 means elements 6 and previous |
| 83 | } |
| 84 | public function translateNthLastChild(XPathExpr $xpath, FunctionNode $function): XPathExpr |
| 85 | { |
| 86 | return $this->translateNthChild($xpath, $function, \true); |
| 87 | } |
| 88 | public function translateNthOfType(XPathExpr $xpath, FunctionNode $function): XPathExpr |
| 89 | { |
| 90 | return $this->translateNthChild($xpath, $function, \false, \false); |
| 91 | } |
| 92 | /** |
| 93 | * @throws ExpressionErrorException |
| 94 | */ |
| 95 | public function translateNthLastOfType(XPathExpr $xpath, FunctionNode $function): XPathExpr |
| 96 | { |
| 97 | if ('*' === $xpath->getElement()) { |
| 98 | throw new ExpressionErrorException('"*:nth-of-type()" is not implemented.'); |
| 99 | } |
| 100 | return $this->translateNthChild($xpath, $function, \true, \false); |
| 101 | } |
| 102 | /** |
| 103 | * @throws ExpressionErrorException |
| 104 | */ |
| 105 | public function translateContains(XPathExpr $xpath, FunctionNode $function): XPathExpr |
| 106 | { |
| 107 | $arguments = $function->getArguments(); |
| 108 | foreach ($arguments as $token) { |
| 109 | if (!($token->isString() || $token->isIdentifier())) { |
| 110 | throw new ExpressionErrorException('Expected a single string or identifier for :contains(), got ' . implode(', ', $arguments)); |
| 111 | } |
| 112 | } |
| 113 | return $xpath->addCondition(sprintf('contains(string(.), %s)', Translator::getXpathLiteral($arguments[0]->getValue()))); |
| 114 | } |
| 115 | /** |
| 116 | * @throws ExpressionErrorException |
| 117 | */ |
| 118 | public function translateLang(XPathExpr $xpath, FunctionNode $function): XPathExpr |
| 119 | { |
| 120 | $arguments = $function->getArguments(); |
| 121 | foreach ($arguments as $token) { |
| 122 | if (!($token->isString() || $token->isIdentifier())) { |
| 123 | throw new ExpressionErrorException('Expected a single string or identifier for :lang(), got ' . implode(', ', $arguments)); |
| 124 | } |
| 125 | } |
| 126 | return $xpath->addCondition(sprintf('lang(%s)', Translator::getXpathLiteral($arguments[0]->getValue()))); |
| 127 | } |
| 128 | /** |
| 129 | * {@inheritdoc} |
| 130 | */ |
| 131 | public function getName(): string |
| 132 | { |
| 133 | return 'function'; |
| 134 | } |
| 135 | } |
| 136 |