class PseudoClassExtension in Zircon Profile 8.0

XPath expression translator pseudo-class extension.

This component is a port of the Python cssselect library, which is copyright Ian Bicking, @author Jean-François Simon <[e-mail]>

Hierarchy

• class \Symfony\Component\CssSelector\XPath\Extension\AbstractExtension implements ExtensionInterface
  • class \Symfony\Component\CssSelector\XPath\Extension\PseudoClassExtension

See also

https://github.com/SimonSapin/cssselect.

File

vendor/symfony/css-selector/XPath/Extension/PseudoClassExtension.php, line 25

Namespace

Symfony\Component\CssSelector\XPath\Extension

class PseudoClassExtension extends AbstractExtension {

  /**
   * {@inheritdoc}
   */
  public function getPseudoClassTranslators() {
    return array(
      'root' => array(
        $this,
        'translateRoot',
      ),
      'first-child' => array(
        $this,
        'translateFirstChild',
      ),
      'last-child' => array(
        $this,
        'translateLastChild',
      ),
      'first-of-type' => array(
        $this,
        'translateFirstOfType',
      ),
      'last-of-type' => array(
        $this,
        'translateLastOfType',
      ),
      'only-child' => array(
        $this,
        'translateOnlyChild',
      ),
      'only-of-type' => array(
        $this,
        'translateOnlyOfType',
      ),
      'empty' => array(
        $this,
        'translateEmpty',
      ),
    );
  }

  /**
   * @param XPathExpr $xpath
   *
   * @return XPathExpr
   */
  public function translateRoot(XPathExpr $xpath) {
    return $xpath
      ->addCondition('not(parent::*)');
  }

  /**
   * @param XPathExpr $xpath
   *
   * @return XPathExpr
   */
  public function translateFirstChild(XPathExpr $xpath) {
    return $xpath
      ->addStarPrefix()
      ->addNameTest()
      ->addCondition('position() = 1');
  }

  /**
   * @param XPathExpr $xpath
   *
   * @return XPathExpr
   */
  public function translateLastChild(XPathExpr $xpath) {
    return $xpath
      ->addStarPrefix()
      ->addNameTest()
      ->addCondition('position() = last()');
  }

  /**
   * @param XPathExpr $xpath
   *
   * @return XPathExpr
   *
   * @throws ExpressionErrorException
   */
  public function translateFirstOfType(XPathExpr $xpath) {
    if ('*' === $xpath
      ->getElement()) {
      throw new ExpressionErrorException('"*:first-of-type" is not implemented.');
    }
    return $xpath
      ->addStarPrefix()
      ->addCondition('position() = 1');
  }

  /**
   * @param XPathExpr $xpath
   *
   * @return XPathExpr
   *
   * @throws ExpressionErrorException
   */
  public function translateLastOfType(XPathExpr $xpath) {
    if ('*' === $xpath
      ->getElement()) {
      throw new ExpressionErrorException('"*:last-of-type" is not implemented.');
    }
    return $xpath
      ->addStarPrefix()
      ->addCondition('position() = last()');
  }

  /**
   * @param XPathExpr $xpath
   *
   * @return XPathExpr
   */
  public function translateOnlyChild(XPathExpr $xpath) {
    return $xpath
      ->addStarPrefix()
      ->addNameTest()
      ->addCondition('last() = 1');
  }

  /**
   * @param XPathExpr $xpath
   *
   * @return XPathExpr
   *
   * @throws ExpressionErrorException
   */
  public function translateOnlyOfType(XPathExpr $xpath) {
    if ('*' === $xpath
      ->getElement()) {
      throw new ExpressionErrorException('"*:only-of-type" is not implemented.');
    }
    return $xpath
      ->addCondition('last() = 1');
  }

  /**
   * @param XPathExpr $xpath
   *
   * @return XPathExpr
   */
  public function translateEmpty(XPathExpr $xpath) {
    return $xpath
      ->addCondition('not(*) and not(string-length())');
  }

  /**
   * {@inheritdoc}
   */
  public function getName() {
    return 'pseudo-class';
  }

}

Members

Name	Modifiers	Type	Description	Overrides
AbstractExtension::getAttributeMatchingTranslators	public	function	Returns attribute operation translators. Overrides ExtensionInterface::getAttributeMatchingTranslators	1
AbstractExtension::getCombinationTranslators	public	function	Returns combination translators. Overrides ExtensionInterface::getCombinationTranslators	1
AbstractExtension::getFunctionTranslators	public	function	Returns function translators. Overrides ExtensionInterface::getFunctionTranslators	2
AbstractExtension::getNodeTranslators	public	function	Returns node translators. Overrides ExtensionInterface::getNodeTranslators	1
PseudoClassExtension::getName	public	function	Returns extension name. Overrides ExtensionInterface::getName
PseudoClassExtension::getPseudoClassTranslators	public	function	Returns pseudo-class translators. Overrides AbstractExtension::getPseudoClassTranslators
PseudoClassExtension::translateEmpty	public	function
PseudoClassExtension::translateFirstChild	public	function
PseudoClassExtension::translateFirstOfType	public	function
PseudoClassExtension::translateLastChild	public	function
PseudoClassExtension::translateLastOfType	public	function
PseudoClassExtension::translateOnlyChild	public	function
PseudoClassExtension::translateOnlyOfType	public	function
PseudoClassExtension::translateRoot	public	function