--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/Zend/Dom/Query/Css2Xpath.php	Mon Dec 13 18:29:26 2010 +0100
@@ -0,0 +1,169 @@
+<?php
+/**
+ * Zend Framework
+ *
+ * LICENSE
+ *
+ * This source file is subject to the new BSD license that is bundled
+ * with this package in the file LICENSE.txt.
+ * It is also available through the world-wide-web at this URL:
+ * http://framework.zend.com/license/new-bsd
+ * If you did not receive a copy of the license and are unable to
+ * obtain it through the world-wide-web, please send an email
+ * to license@zend.com so we can send you a copy immediately.
+ *
+ * @category   Zend
+ * @package    Zend_Dom
+ * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ */
+
+/**
+ * Transform CSS selectors to XPath
+ *
+ * @package    Zend_Dom
+ * @subpackage Query
+ * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ * @version    $Id: Css2Xpath.php 22044 2010-04-28 19:58:29Z matthew $
+ */
+class Zend_Dom_Query_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) {
+            $pathSegment = self::_tokenize($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 $key => $xpath) {
+                    $paths[$key] .= '//*' . ltrim($pathSegment, '*');
+                    $paths[]      = $xpath . $pathSegment;
+                }
+            } else {
+                foreach ($paths as $key => $xpath) {
+                    $paths[$key] .= '//' . $pathSegment;
+                }
+            }
+        }
+
+        if (1 == count($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',
+            array(__CLASS__, '_createEqualityExpression'),
+            $expression
+        );
+
+        // arbitrary attribute contains full word
+        $expression = preg_replace_callback(
+            '|\[([a-z0-9_-]+)~=[\'"]([^\'"]+)[\'"]\]|i',
+            array(__CLASS__, '_normalizeSpaceAttribute'),
+            $expression
+        );
+
+        // arbitrary attribute contains specified content
+        $expression = preg_replace_callback(
+            '|\[([a-z0-9_-]+)\*=[\'"]([^\'"]+)[\'"]\]|i',
+            array(__CLASS__, '_createContainsExpression'),
+            $expression
+        );
+
+        // Classes
+        $expression = preg_replace(
+            '|\.([a-z][a-z0-9_-]*)|i', 
+            "[contains(concat(' ', normalize-space(@class), ' '), ' \$1 ')]", 
+            $expression
+        );
+
+        /** ZF-9764 -- remove double asterix */
+        $expression = str_replace('**', '*', $expression);
+
+        return $expression;
+    }
+
+    /**
+     * Callback for creating equality expressions
+     * 
+     * @param  array $matches 
+     * @return string
+     */
+    protected static function _createEqualityExpression($matches)
+    {
+        return '[@' . strtolower($matches[1]) . "='" . $matches[2] . "']";
+    }
+
+    /**
+     * Callback for creating expressions to match one or more attribute values
+     * 
+     * @param  array $matches 
+     * @return string
+     */
+    protected static function _normalizeSpaceAttribute($matches)
+    {
+        return "[contains(concat(' ', normalize-space(@" . strtolower($matches[1]) . "), ' '), ' " 
+             . $matches[2] . " ')]";
+    }
+
+    /**
+     * Callback for creating a strict "contains" expression
+     * 
+     * @param  array $matches 
+     * @return string
+     */
+    protected static function _createContainsExpression($matches)
+    {
+        return "[contains(@" . strtolower($matches[1]) . ", '" 
+             . $matches[2] . "')]";
+    }
+}