Symfony\Component\CssSelector\XPath

XPathExpr{} WC 1.0

XPath expression translator interface.

This component is a port of the Python cssselect library, which is copyright Ian Bicking, @see https://github.com/SimonSapin/cssselect.

Хуков нет.

Возвращает

Null. Ничего.

Использование

$XPathExpr = new XPathExpr();
// use class methods

Методы

1. __construct($path = '', $element = '*', $condition = '', $starPrefix = false)
2. __toString()
3. addCondition($condition)
4. addNameTest()
5. addStarPrefix()
6. getCondition()
7. getElement()
8. join($combiner, XPathExpr $expr)

Код XPathExpr{} XPathExpr{} ^{WC 5.0.0}

<?php
class XPathExpr
{
    /**
     * @var string
     */
    private $path;

    /**
     * @var string
     */
    private $element;

    /**
     * @var string
     */
    private $condition;

    /**
     * @param string $path
     * @param string $element
     * @param string $condition
     * @param bool   $starPrefix
     */
    public function __construct($path = '', $element = '*', $condition = '', $starPrefix = false)
    {
        $this->path = $path;
        $this->element = $element;
        $this->condition = $condition;

        if ($starPrefix) {
            $this->addStarPrefix();
        }
    }

    /**
     * @return string
     */
    public function getElement()
    {
        return $this->element;
    }

    /**
     * @param $condition
     *
     * @return $this
     */
    public function addCondition($condition)
    {
        $this->condition = $this->condition ? sprintf('%s and (%s)', $this->condition, $condition) : $condition;

        return $this;
    }

    /**
     * @return string
     */
    public function getCondition()
    {
        return $this->condition;
    }

    /**
     * @return $this
     */
    public function addNameTest()
    {
        if ('*' !== $this->element) {
            $this->addCondition('name() = '.Translator::getXpathLiteral($this->element));
            $this->element = '*';
        }

        return $this;
    }

    /**
     * @return $this
     */
    public function addStarPrefix()
    {
        $this->path .= '*/';

        return $this;
    }

    /**
     * Joins another XPathExpr with a combiner.
     *
     * @param string    $combiner
     * @param XPathExpr $expr
     *
     * @return $this
     */
    public function join($combiner, XPathExpr $expr)
    {
        $path = $this->__toString().$combiner;

        if ('*/' !== $expr->path) {
            $path .= $expr->path;
        }

        $this->path = $path;
        $this->element = $expr->element;
        $this->condition = $expr->condition;

        return $this;
    }

    /**
     * @return string
     */
    public function __toString()
    {
        $path = $this->path.$this->element;
        $condition = null === $this->condition || '' === $this->condition ? '' : '['.$this->condition.']';

        return $path.$condition;
    }
}