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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\Parser\Shortcut;
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13
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14 use Symfony\Component\CssSelector\Node\ClassNode;
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15 use Symfony\Component\CssSelector\Node\ElementNode;
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16 use Symfony\Component\CssSelector\Node\SelectorNode;
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17 use Symfony\Component\CssSelector\Parser\ParserInterface;
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18
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19 /**
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20 * CSS selector class parser shortcut.
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21 *
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22 * This component is a port of the Python cssselect library,
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23 * which is copyright Ian Bicking, @see https://github.com/SimonSapin/cssselect.
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24 *
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25 * @author Jean-François Simon <jeanfrancois.simon@sensiolabs.com>
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26 *
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27 * @internal
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28 */
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29 class ClassParser implements ParserInterface
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30 {
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31 /**
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32 * {@inheritdoc}
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33 */
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34 public function parse($source)
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35 {
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36 // Matches an optional namespace, optional element, and required class
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37 // $source = 'test|input.ab6bd_field';
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38 // $matches = array (size=4)
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39 // 0 => string 'test|input.ab6bd_field' (length=22)
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40 // 1 => string 'test' (length=4)
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41 // 2 => string 'input' (length=5)
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42 // 3 => string 'ab6bd_field' (length=11)
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43 if (preg_match('/^(?:([a-z]++)\|)?+([\w-]++|\*)?+\.([\w-]++)$/i', trim($source), $matches)) {
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44 return [
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45 new SelectorNode(new ClassNode(new ElementNode($matches[1] ?: null, $matches[2] ?: null), $matches[3])),
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46 ];
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47 }
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48
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49 return [];
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50 }
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51 }
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