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1 <?php
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2
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3 /*
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4 * This file is part of the Symfony package.
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5 *
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6 * (c) Fabien Potencier <fabien@symfony.com>
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7 *
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8 * For the full copyright and license information, please view the LICENSE
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9 * file that was distributed with this source code.
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10 */
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11
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12 namespace Symfony\Component\CssSelector\XPath\Extension;
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13
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14 use Symfony\Component\CssSelector\XPath\XPathExpr;
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15
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16 /**
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17 * XPath expression translator combination extension.
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18 *
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19 * This component is a port of the Python cssselect library,
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20 * which is copyright Ian Bicking, @see https://github.com/SimonSapin/cssselect.
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21 *
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22 * @author Jean-François Simon <jeanfrancois.simon@sensiolabs.com>
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23 *
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24 * @internal
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25 */
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26 class CombinationExtension extends AbstractExtension
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27 {
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28 /**
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29 * {@inheritdoc}
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30 */
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31 public function getCombinationTranslators()
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32 {
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33 return [
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34 ' ' => [$this, 'translateDescendant'],
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35 '>' => [$this, 'translateChild'],
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36 '+' => [$this, 'translateDirectAdjacent'],
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37 '~' => [$this, 'translateIndirectAdjacent'],
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38 ];
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39 }
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40
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41 /**
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42 * @return XPathExpr
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43 */
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44 public function translateDescendant(XPathExpr $xpath, XPathExpr $combinedXpath)
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45 {
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46 return $xpath->join('/descendant-or-self::*/', $combinedXpath);
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47 }
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48
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49 /**
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50 * @return XPathExpr
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51 */
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52 public function translateChild(XPathExpr $xpath, XPathExpr $combinedXpath)
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53 {
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54 return $xpath->join('/', $combinedXpath);
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55 }
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56
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57 /**
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58 * @return XPathExpr
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59 */
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60 public function translateDirectAdjacent(XPathExpr $xpath, XPathExpr $combinedXpath)
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61 {
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62 return $xpath
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63 ->join('/following-sibling::', $combinedXpath)
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64 ->addNameTest()
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65 ->addCondition('position() = 1');
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66 }
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67
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68 /**
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69 * @return XPathExpr
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70 */
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71 public function translateIndirectAdjacent(XPathExpr $xpath, XPathExpr $combinedXpath)
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72 {
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73 return $xpath->join('/following-sibling::', $combinedXpath);
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74 }
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75
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76 /**
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77 * {@inheritdoc}
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78 */
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79 public function getName()
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80 {
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81 return 'combination';
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82 }
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83 }
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