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- <?php
- /*
- * This file is part of the Mink package.
- * (c) Konstantin Kudryashov <ever.zet@gmail.com>
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
- namespace Behat\Mink\Selector\Xpath;
- /**
- * XPath manipulation utility.
- *
- * @author Graham Bates
- * @author Christophe Coevoet <stof@notk.org>
- */
- class Manipulator
- {
- /**
- * Regex to find union operators not inside brackets.
- */
- const UNION_PATTERN = '/\|(?![^\[]*\])/';
- /**
- * Prepends the XPath prefix to the given XPath.
- *
- * The returned XPath will match elements matching the XPath inside an element
- * matching the prefix.
- *
- * @param string $xpath
- * @param string $prefix
- *
- * @return string
- */
- public function prepend($xpath, $prefix)
- {
- $expressions = array();
- // If the xpath prefix contains a union we need to wrap it in parentheses.
- if (preg_match(self::UNION_PATTERN, $prefix)) {
- $prefix = '('.$prefix.')';
- }
- // Split any unions into individual expressions.
- foreach (preg_split(self::UNION_PATTERN, $xpath) as $expression) {
- $expression = trim($expression);
- $parenthesis = '';
- // If the union is inside some braces, we need to preserve the opening braces and apply
- // the prefix only inside it.
- if (preg_match('/^[\(\s*]+/', $expression, $matches)) {
- $parenthesis = $matches[0];
- $expression = substr($expression, strlen($parenthesis));
- }
- // add prefix before element selector
- if (0 === strpos($expression, '/')) {
- $expression = $prefix.$expression;
- } else {
- $expression = $prefix.'/'.$expression;
- }
- $expressions[] = $parenthesis.$expression;
- }
- return implode(' | ', $expressions);
- }
- }
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