scratch – Blame information for rev 87
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Rev | Author | Line No. | Line |
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87 | office | 1 | <?php |
2 | |||
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 | |||
12 | namespace Symfony\Component\CssSelector\XPath\Extension; |
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13 | |||
14 | use Symfony\Component\CssSelector\Exception\ExpressionErrorException; |
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15 | use Symfony\Component\CssSelector\XPath\XPathExpr; |
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16 | |||
17 | /** |
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18 | * XPath expression translator pseudo-class extension. |
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19 | * |
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20 | * This component is a port of the Python cssselect library, |
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21 | * which is copyright Ian Bicking, @see https://github.com/SimonSapin/cssselect. |
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22 | * |
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23 | * @author Jean-François Simon <jeanfrancois.simon@sensiolabs.com> |
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24 | * |
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25 | * @internal |
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26 | */ |
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27 | class PseudoClassExtension extends AbstractExtension |
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28 | { |
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29 | /** |
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30 | * {@inheritdoc} |
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31 | */ |
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32 | public function getPseudoClassTranslators() |
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33 | { |
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34 | return array( |
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35 | 'root' => array($this, 'translateRoot'), |
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36 | 'first-child' => array($this, 'translateFirstChild'), |
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37 | 'last-child' => array($this, 'translateLastChild'), |
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38 | 'first-of-type' => array($this, 'translateFirstOfType'), |
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39 | 'last-of-type' => array($this, 'translateLastOfType'), |
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40 | 'only-child' => array($this, 'translateOnlyChild'), |
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41 | 'only-of-type' => array($this, 'translateOnlyOfType'), |
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42 | 'empty' => array($this, 'translateEmpty'), |
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43 | ); |
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44 | } |
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45 | |||
46 | /** |
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47 | * @param XPathExpr $xpath |
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48 | * |
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49 | * @return XPathExpr |
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50 | */ |
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51 | public function translateRoot(XPathExpr $xpath) |
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52 | { |
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53 | return $xpath->addCondition('not(parent::*)'); |
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54 | } |
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55 | |||
56 | /** |
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57 | * @param XPathExpr $xpath |
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58 | * |
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59 | * @return XPathExpr |
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60 | */ |
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61 | public function translateFirstChild(XPathExpr $xpath) |
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62 | { |
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63 | return $xpath |
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64 | ->addStarPrefix() |
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65 | ->addNameTest() |
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66 | ->addCondition('position() = 1'); |
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67 | } |
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68 | |||
69 | /** |
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70 | * @param XPathExpr $xpath |
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71 | * |
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72 | * @return XPathExpr |
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73 | */ |
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74 | public function translateLastChild(XPathExpr $xpath) |
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75 | { |
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76 | return $xpath |
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77 | ->addStarPrefix() |
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78 | ->addNameTest() |
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79 | ->addCondition('position() = last()'); |
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80 | } |
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81 | |||
82 | /** |
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83 | * @param XPathExpr $xpath |
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84 | * |
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85 | * @return XPathExpr |
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86 | * |
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87 | * @throws ExpressionErrorException |
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88 | */ |
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89 | public function translateFirstOfType(XPathExpr $xpath) |
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90 | { |
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91 | if ('*' === $xpath->getElement()) { |
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92 | throw new ExpressionErrorException('"*:first-of-type" is not implemented.'); |
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93 | } |
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94 | |||
95 | return $xpath |
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96 | ->addStarPrefix() |
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97 | ->addCondition('position() = 1'); |
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98 | } |
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99 | |||
100 | /** |
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101 | * @param XPathExpr $xpath |
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102 | * |
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103 | * @return XPathExpr |
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104 | * |
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105 | * @throws ExpressionErrorException |
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106 | */ |
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107 | public function translateLastOfType(XPathExpr $xpath) |
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108 | { |
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109 | if ('*' === $xpath->getElement()) { |
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110 | throw new ExpressionErrorException('"*:last-of-type" is not implemented.'); |
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111 | } |
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112 | |||
113 | return $xpath |
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114 | ->addStarPrefix() |
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115 | ->addCondition('position() = last()'); |
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116 | } |
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117 | |||
118 | /** |
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119 | * @param XPathExpr $xpath |
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120 | * |
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121 | * @return XPathExpr |
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122 | */ |
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123 | public function translateOnlyChild(XPathExpr $xpath) |
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124 | { |
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125 | return $xpath |
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126 | ->addStarPrefix() |
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127 | ->addNameTest() |
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128 | ->addCondition('last() = 1'); |
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129 | } |
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130 | |||
131 | /** |
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132 | * @param XPathExpr $xpath |
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133 | * |
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134 | * @return XPathExpr |
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135 | * |
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136 | * @throws ExpressionErrorException |
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137 | */ |
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138 | public function translateOnlyOfType(XPathExpr $xpath) |
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139 | { |
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140 | if ('*' === $xpath->getElement()) { |
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141 | throw new ExpressionErrorException('"*:only-of-type" is not implemented.'); |
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142 | } |
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143 | |||
144 | return $xpath->addCondition('last() = 1'); |
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145 | } |
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146 | |||
147 | /** |
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148 | * @param XPathExpr $xpath |
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149 | * |
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150 | * @return XPathExpr |
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151 | */ |
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152 | public function translateEmpty(XPathExpr $xpath) |
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153 | { |
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154 | return $xpath->addCondition('not(*) and not(string-length())'); |
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155 | } |
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156 | |||
157 | /** |
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158 | * {@inheritdoc} |
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159 | */ |
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160 | public function getName() |
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161 | { |
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162 | return 'pseudo-class'; |
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163 | } |
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164 | } |