<?php
/**
* Zend Framework (http://framework.zend.com/)
*
* @link http://github.com/zendframework/zf2 for the canonical source repository
* @copyright Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
namespace Zend\Dom;
/**
* Transform CSS selectors to XPath
*/
class Css2Xpath
{
/**
* Transform CSS expression to XPath
*
* @param string $path
* @return string
*/
public static function transform($path)
{
$path = (string) $path;
if (strstr($path, ',')) {
$paths = explode(',', $path);
$expressions = array();
foreach ($paths as $path) {
$xpath = self::transform(trim($path));
if (is_string($xpath)) {
$expressions[] = $xpath;
} elseif (is_array($xpath)) {
$expressions = array_merge($expressions, $xpath);
}
}
return implode('|', $expressions);
}
$paths = array('//');
$path = preg_replace('|\s+>\s+|', '>', $path);
$segments = preg_split('/\s+/', $path);
foreach ($segments as $key => $segment) {
$pathSegment = static::_tokenize($segment);
if (0 == $key) {
if (0 === strpos($pathSegment, '[contains(')) {
$paths[0] .= '*' . ltrim($pathSegment, '*');
} else {
$paths[0] .= $pathSegment;
}
continue;
}
if (0 === strpos($pathSegment, '[contains(')) {
foreach ($paths as $pathKey => $xpath) {
$paths[$pathKey] .= '//*' . ltrim($pathSegment, '*');
$paths[] = $xpath . $pathSegment;
}
} else {
foreach ($paths as $pathKey => $xpath) {
$paths[$pathKey] .= '//' . $pathSegment;
}
}
}
if (1 == count($paths)) {
return $paths[0];
}
return implode('|', $paths);
}
/**
* Tokenize CSS expressions to XPath
*
* @param string $expression
* @return string
*/
protected static function _tokenize($expression)
{
// Child selectors
$expression = str_replace('>', '/', $expression);
// IDs
$expression = preg_replace('|#([a-z][a-z0-9_-]*)|i', '[@id=\'$1\']', $expression);
$expression = preg_replace('|(?<![a-z0-9_-])(\[@id=)|i', '*$1', $expression);
// arbitrary attribute strict equality
$expression = preg_replace_callback(
'|\[@?([a-z0-9_-]+)=[\'"]([^\'"]+)[\'"]\]|i',
function ($matches) {
return '[@' . strtolower($matches[1]) . "='" . $matches[2] . "']";
},
$expression
);
// arbitrary attribute contains full word
$expression = preg_replace_callback(
'|\[([a-z0-9_-]+)~=[\'"]([^\'"]+)[\'"]\]|i',
function ($matches) {
return "[contains(concat(' ', normalize-space(@" . strtolower($matches[1]) . "), ' '), ' "
. $matches[2] . " ')]";
},
$expression
);
// arbitrary attribute contains specified content
$expression = preg_replace_callback(
'|\[([a-z0-9_-]+)\*=[\'"]([^\'"]+)[\'"]\]|i',
function ($matches) {
return "[contains(@" . strtolower($matches[1]) . ", '"
. $matches[2] . "')]";
},
$expression
);
// Classes
if(false === strpos($expression, "[@")) {
$expression = preg_replace(
'|\.([a-z][a-z0-9_-]*)|i',
"[contains(concat(' ', normalize-space(@class), ' '), ' \$1 ')]",
$expression
);
}
/** ZF-9764 -- remove double asterisk */
$expression = str_replace('**', '*', $expression);
return $expression;
}
}
# |
Change |
User |
Description |
Committed |
|
#1
|
18334 |
Liz Lam |
initial add of jambox |
|
|