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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;
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13
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14 /**
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15 * XPath expression translator interface.
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16 *
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17 * This component is a port of the Python cssselect library,
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18 * which is copyright Ian Bicking, @see https://github.com/SimonSapin/cssselect.
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19 *
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20 * @author Jean-François Simon <jeanfrancois.simon@sensiolabs.com>
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21 *
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22 * @internal
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23 */
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24 class XPathExpr
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25 {
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26 private $path;
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27 private $element;
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28 private $condition;
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29
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30 /**
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31 * @param string $path
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32 * @param string $element
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33 * @param string $condition
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34 * @param bool $starPrefix
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35 */
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36 public function __construct($path = '', $element = '*', $condition = '', $starPrefix = false)
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37 {
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38 $this->path = $path;
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39 $this->element = $element;
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40 $this->condition = $condition;
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41
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42 if ($starPrefix) {
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43 $this->addStarPrefix();
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44 }
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45 }
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46
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47 /**
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48 * @return string
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49 */
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50 public function getElement()
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51 {
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52 return $this->element;
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53 }
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54
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55 /**
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56 * @return $this
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57 */
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58 public function addCondition($condition)
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59 {
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60 $this->condition = $this->condition ? sprintf('(%s) and (%s)', $this->condition, $condition) : $condition;
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61
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62 return $this;
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63 }
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64
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65 /**
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66 * @return string
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67 */
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68 public function getCondition()
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69 {
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70 return $this->condition;
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71 }
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72
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73 /**
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74 * @return $this
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75 */
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76 public function addNameTest()
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77 {
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78 if ('*' !== $this->element) {
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79 $this->addCondition('name() = '.Translator::getXpathLiteral($this->element));
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80 $this->element = '*';
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81 }
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82
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83 return $this;
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84 }
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85
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86 /**
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87 * @return $this
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88 */
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89 public function addStarPrefix()
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90 {
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91 $this->path .= '*/';
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92
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93 return $this;
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94 }
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95
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96 /**
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97 * Joins another XPathExpr with a combiner.
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98 *
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99 * @param string $combiner
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100 * @param XPathExpr $expr
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101 *
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102 * @return $this
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103 */
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104 public function join($combiner, self $expr)
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105 {
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106 $path = $this->__toString().$combiner;
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107
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108 if ('*/' !== $expr->path) {
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109 $path .= $expr->path;
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110 }
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111
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112 $this->path = $path;
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113 $this->element = $expr->element;
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114 $this->condition = $expr->condition;
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115
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116 return $this;
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117 }
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118
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119 /**
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120 * @return string
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121 */
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122 public function __toString()
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123 {
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124 $path = $this->path.$this->element;
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125 $condition = null === $this->condition || '' === $this->condition ? '' : '['.$this->condition.']';
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126
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127 return $path.$condition;
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128 }
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129 }
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