<?php
/**
 * phpQuery is a server-side, chainable, CSS3 selector driven
 * Document Object Model (DOM) API based on jQuery JavaScript Library.
 *
 * @version 0.9.5
 *
 * @link http://code.google.com/p/phpquery/
 * @link http://phpquery-library.blogspot.com/
 * @link http://jquery.com/
 *
 * @author Tobiasz Cudnik <tobiasz.cudnik/gmail.com>
 * @license http://www.opensource.org/licenses/mit-license.php MIT License
 */
// class names for instanceof
// TODO move them as class constants into phpQuery
define('DOMDOCUMENT', 'DOMDocument');
define('DOMELEMENT', 'DOMElement');
define('DOMNODELIST', 'DOMNodeList');
define('DOMNODE', 'DOMNode');
if (function_exists('libxml_use_internal_errors')) {
    libxml_use_internal_errors(true);
}

/**
 * DOMEvent class.
 *
 * Based on
 *
 * @link http://developer.mozilla.org/En/DOM:event
 *
 * @author Tobiasz Cudnik <tobiasz.cudnik/gmail.com>
 *
 * @todo implement ArrayAccess ?
 */
class DOMEvent
{
    /**
     * Returns a boolean indicating whether the event bubbles up through the DOM or not.
     *
     * @var unknown_type
     */
    public $bubbles = true;

    /**
     * Returns a boolean indicating whether the event is cancelable.
     *
     * @var unknown_type
     */
    public $cancelable = true;

    /**
     * Returns a reference to the currently registered target for the event.
     *
     * @var unknown_type
     */
    public $currentTarget;

    /**
     * Returns detail about the event, depending on the type of event.
     *
     * @var unknown_type
     *
     * @link http://developer.mozilla.org/en/DOM/event.detail
     */
    public $detail; // ???
    /**
     * Used to indicate which phase of the event flow is currently being evaluated.
     *
     * NOT IMPLEMENTED
     *
     * @var unknown_type
     *
     * @link http://developer.mozilla.org/en/DOM/event.eventPhase
     */
    public $eventPhase; // ???
    /**
     * The explicit original target of the event (Mozilla-specific).
     *
     * NOT IMPLEMENTED
     *
     * @var unknown_type
     */
    public $explicitOriginalTarget; // moz only
    /**
     * The original target of the event, before any retargetings (Mozilla-specific).
     *
     * NOT IMPLEMENTED
     *
     * @var unknown_type
     */
    public $originalTarget; // moz only
    /**
     * Identifies a secondary target for the event.
     *
     * @var unknown_type
     */
    public $relatedTarget;

    /**
     * Returns a reference to the target to which the event was originally dispatched.
     *
     * @var unknown_type
     */
    public $target;

    /**
     * Returns the time that the event was created.
     *
     * @var unknown_type
     */
    public $timeStamp;

    /**
     * Returns the name of the event (case-insensitive).
     */
    public $type;
    public $runDefault = true;
    public $data = null;

    public function __construct($data)
    {
        foreach ($data as $k => $v) {
            $this->$k = $v;
        }
        if (!$this->timeStamp) {
            $this->timeStamp = time();
        }
    }

    /**
     * Cancels the event (if it is cancelable).
     */
    public function preventDefault()
    {
        $this->runDefault = false;
    }

    /**
     * Stops the propagation of events further along in the DOM.
     */
    public function stopPropagation()
    {
        $this->bubbles = false;
    }
}

/**
 * DOMDocumentWrapper class simplifies work with DOMDocument.
 *
 * Know bug:
 * - in XHTML fragments, <br /> changes to <br clear="none" />
 *
 * @todo check XML catalogs compatibility
 *
 * @author Tobiasz Cudnik <tobiasz.cudnik/gmail.com>
 */
class DOMDocumentWrapper
{
    /**
     * @var DOMDocument
     */
    public $document;
    public $id;

    /**
     * @todo Rewrite as method and quess if null.
     *
     * @var unknown_type
     */
    public $contentType = '';
    public $xpath;
    public $uuid = 0;
    public $data = array();
    public $dataNodes = array();
    public $events = array();
    public $eventsNodes = array();
    public $eventsGlobal = array();

    /**
     * @TODO iframes support http://code.google.com/p/phpquery/issues/detail?id=28
     *
     * @var unknown_type
     */
    public $frames = array();

    /**
     * Document root, by default equals to document itself.
     * Used by documentFragments.
     *
     * @var DOMNode
     */
    public $root;
    public $isDocumentFragment;
    public $isXML = false;
    public $isXHTML = false;
    public $isHTML = false;
    public $charset;

    public function __construct($markup = null, $contentType = null, $newDocumentID = null)
    {
        if (isset($markup)) {
            $this->load($markup, $contentType, $newDocumentID);
        }
        $this->id = $newDocumentID ? $newDocumentID : md5(microtime());
    }

    public function load($markup, $contentType = null, $newDocumentID = null)
    {
        //		phpQuery::$documents[$id] = $this;
        $this->contentType = strtolower($contentType);
        if ($markup instanceof DOMDOCUMENT) {
            $this->document = $markup;
            $this->root = $this->document;
            $this->charset = $this->document->encoding;
            // TODO isDocumentFragment
        } else {
            $loaded = $this->loadMarkup($markup);
        }
        if ($loaded) {
            //			$this->document->formatOutput = true;
            $this->document->preserveWhiteSpace = true;
            $this->xpath = new DOMXPath($this->document);
            $this->afterMarkupLoad();

            return true;
            // remember last loaded document
            //			return phpQuery::selectDocument($id);
        }

        return false;
    }

    protected function afterMarkupLoad()
    {
        if ($this->isXHTML) {
            $this->xpath->registerNamespace('html', 'http://www.w3.org/1999/xhtml');
        }
    }

    protected function loadMarkup($markup)
    {
        $loaded = false;
        if ($this->contentType) {
            self::debug("Load markup for content type {$this->contentType}");
            // content determined by contentType
            list($contentType, $charset) = $this->contentTypeToArray($this->contentType);
            switch ($contentType) {
                case 'text/html':
                    phpQuery::debug("Loading HTML, content type '{$this->contentType}'");
                    $loaded = $this->loadMarkupHTML($markup, $charset);
                    break;
                case 'text/xml':
                case 'application/xhtml+xml':
                    phpQuery::debug("Loading XML, content type '{$this->contentType}'");
                    $loaded = $this->loadMarkupXML($markup, $charset);
                    break;
                default:
                    // for feeds or anything that sometimes doesn't use text/xml
                    if (strpos('xml', $this->contentType) !== false) {
                        phpQuery::debug("Loading XML, content type '{$this->contentType}'");
                        $loaded = $this->loadMarkupXML($markup, $charset);
                    } else {
                        phpQuery::debug("Could not determine document type from content type '{$this->contentType}'");
                    }
            }
        } else {
            // content type autodetection
            if ($this->isXML($markup)) {
                phpQuery::debug('Loading XML, isXML() == true');
                $loaded = $this->loadMarkupXML($markup);
                if (!$loaded && $this->isXHTML) {
                    phpQuery::debug('Loading as XML failed, trying to load as HTML, isXHTML == true');
                    $loaded = $this->loadMarkupHTML($markup);
                }
            } else {
                phpQuery::debug('Loading HTML, isXML() == false');
                $loaded = $this->loadMarkupHTML($markup);
            }
        }

        return $loaded;
    }

    protected function loadMarkupReset()
    {
        $this->isXML = $this->isXHTML = $this->isHTML = false;
    }

    protected function documentCreate($charset, $version = '1.0')
    {
        if (!$version) {
            $version = '1.0';
        }
        $this->document = new DOMDocument($version, $charset);
        $this->charset = $this->document->encoding;
        //		$this->document->encoding = $charset;
        $this->document->formatOutput = true;
        $this->document->preserveWhiteSpace = true;
    }

    protected function loadMarkupHTML($markup, $requestedCharset = null)
    {
        if (phpQuery::$debug) {
            phpQuery::debug('Full markup load (HTML): '.substr($markup, 0, 250));
        }
        $this->loadMarkupReset();
        $this->isHTML = true;
        if (!isset($this->isDocumentFragment)) {
            $this->isDocumentFragment = self::isDocumentFragmentHTML($markup);
        }
        $charset = null;
        $documentCharset = $this->charsetFromHTML($markup);
        $addDocumentCharset = false;
        if ($documentCharset) {
            $charset = $documentCharset;
            $markup = $this->charsetFixHTML($markup);
        } elseif ($requestedCharset) {
            $charset = $requestedCharset;
        }
        if (!$charset) {
            $charset = phpQuery::$defaultCharset;
        }
        // HTTP 1.1 says that the default charset is ISO-8859-1
        // @see http://www.w3.org/International/O-HTTP-charset
        if (!$documentCharset) {
            $documentCharset = 'ISO-8859-1';
            $addDocumentCharset = true;
        }
        // Should be careful here, still need 'magic encoding detection' since lots of pages have other 'default encoding'
        // Worse, some pages can have mixed encodings... we'll try not to worry about that
        $requestedCharset = strtoupper($requestedCharset);
        $documentCharset = strtoupper($documentCharset);
        phpQuery::debug("DOC: $documentCharset REQ: $requestedCharset");
        if ($requestedCharset && $documentCharset && $requestedCharset !== $documentCharset) {
            phpQuery::debug('CHARSET CONVERT');
            // Document Encoding Conversion
            // http://code.google.com/p/phpquery/issues/detail?id=86
            if (function_exists('mb_detect_encoding')) {
                $possibleCharsets = array($documentCharset, $requestedCharset, 'AUTO');
                $docEncoding = mb_detect_encoding($markup, implode(', ', $possibleCharsets));
                if (!$docEncoding) {
                    $docEncoding = $documentCharset;
                } // ok trust the document
                phpQuery::debug("DETECTED '$docEncoding'");
                // Detected does not match what document says...
                if ($docEncoding !== $documentCharset) {
                    // Tricky..
                }
                if ($docEncoding !== $requestedCharset) {
                    phpQuery::debug("CONVERT $docEncoding => $requestedCharset");
                    $markup = mb_convert_encoding($markup, $requestedCharset, $docEncoding);
                    $markup = $this->charsetAppendToHTML($markup, $requestedCharset);
                    $charset = $requestedCharset;
                }
            } else {
                phpQuery::debug('TODO: charset conversion without mbstring...');
            }
        }
        $return = false;
        if ($this->isDocumentFragment) {
            phpQuery::debug("Full markup load (HTML), DocumentFragment detected, using charset '$charset'");
            $return = $this->documentFragmentLoadMarkup($this, $charset, $markup);
        } else {
            if ($addDocumentCharset) {
                phpQuery::debug("Full markup load (HTML), appending charset: '$charset'");
                $markup = $this->charsetAppendToHTML($markup, $charset);
            }
            phpQuery::debug("Full markup load (HTML), documentCreate('$charset')");
            $this->documentCreate($charset);
            /* 		$return = phpQuery::$debug === 2
              ? $this->document->loadHTML($markup)
              : @$this->document->loadHTML($markup); */

            $return = @$this->document->loadHTML($markup);

            if ($return) {
                $this->root = $this->document;
            }
        }
        if ($return && !$this->contentType) {
            $this->contentType = 'text/html';
        }

        return $return;
    }

    protected function loadMarkupXML($markup, $requestedCharset = null)
    {
        if (phpQuery::$debug) {
            phpQuery::debug('Full markup load (XML): '.substr($markup, 0, 250));
        }
        $this->loadMarkupReset();
        $this->isXML = true;
        // check agains XHTML in contentType or markup
        $isContentTypeXHTML = $this->isXHTML();
        $isMarkupXHTML = $this->isXHTML($markup);
        if ($isContentTypeXHTML || $isMarkupXHTML) {
            self::debug('Full markup load (XML), XHTML detected');
            $this->isXHTML = true;
        }
        // determine document fragment
        if (!isset($this->isDocumentFragment)) {
            $this->isDocumentFragment = $this->isXHTML ? self::isDocumentFragmentXHTML($markup) : self::isDocumentFragmentXML($markup);
        }
        // this charset will be used
        $charset = null;
        // charset from XML declaration @var string
        $documentCharset = $this->charsetFromXML($markup);
        if (!$documentCharset) {
            if ($this->isXHTML) {
                // this is XHTML, try to get charset from content-type meta header
                $documentCharset = $this->charsetFromHTML($markup);
                if ($documentCharset) {
                    phpQuery::debug("Full markup load (XML), appending XHTML charset '$documentCharset'");
                    $this->charsetAppendToXML($markup, $documentCharset);
                    $charset = $documentCharset;
                }
            }
            if (!$documentCharset) {
                // if still no document charset...
                $charset = $requestedCharset;
            }
        } elseif ($requestedCharset) {
            $charset = $requestedCharset;
        }
        if (!$charset) {
            $charset = phpQuery::$defaultCharset;
        }
        if ($requestedCharset && $documentCharset && $requestedCharset != $documentCharset) {
            // TODO place for charset conversion
            //			$charset = $requestedCharset;
        }
        $return = false;
        if ($this->isDocumentFragment) {
            phpQuery::debug("Full markup load (XML), DocumentFragment detected, using charset '$charset'");
            $return = $this->documentFragmentLoadMarkup($this, $charset, $markup);
        } else {
            // FIXME ???
            if ($isContentTypeXHTML && !$isMarkupXHTML) {
                if (!$documentCharset) {
                    phpQuery::debug("Full markup load (XML), appending charset '$charset'");
                    $markup = $this->charsetAppendToXML($markup, $charset);
                }
            }
            // see http://pl2.php.net/manual/en/book.dom.php#78929
            // LIBXML_DTDLOAD (>= PHP 5.1)
            // does XML ctalogues works with LIBXML_NONET
            //		$this->document->resolveExternals = true;
            // TODO test LIBXML_COMPACT for performance improvement
            // create document
            $this->documentCreate($charset);
            if (phpversion() < 5.1) {
                $this->document->resolveExternals = true;
                $return = phpQuery::$debug === 2 ? $this->document->loadXML($markup) : @$this->document->loadXML($markup);
            } else {
                /* @link http://pl2.php.net/manual/en/libxml.constants.php */
                $libxmlStatic = phpQuery::$debug === 2 ? LIBXML_DTDLOAD | LIBXML_DTDATTR | LIBXML_NONET : LIBXML_DTDLOAD | LIBXML_DTDATTR | LIBXML_NONET | LIBXML_NOWARNING | LIBXML_NOERROR;
                $return = $this->document->loadXML($markup, $libxmlStatic);
                // 				if (! $return)
                // 					$return = $this->document->loadHTML($markup);
            }
            if ($return) {
                $this->root = $this->document;
            }
        }
        if ($return) {
            if (!$this->contentType) {
                if ($this->isXHTML) {
                    $this->contentType = 'application/xhtml+xml';
                } else {
                    $this->contentType = 'text/xml';
                }
            }

            return $return;
        } else {
            throw new Exception('Error loading XML markup');
        }
    }

    protected function isXHTML($markup = null)
    {
        if (!isset($markup)) {
            return strpos($this->contentType, 'xhtml') !== false;
        }
        // XXX ok ?
        return strpos($markup, '<!DOCTYPE html') !== false;
        //		return stripos($doctype, 'xhtml') !== false;
        //		$doctype = isset($dom->doctype) && is_object($dom->doctype)
        //			? $dom->doctype->publicId
        //			: self::$defaultDoctype;
    }

    protected function isXML($markup)
    {
        //		return strpos($markup, '<?xml') !== false && stripos($markup, 'xhtml') === false;
        return strpos(substr($markup, 0, 100), '<'.'?xml') !== false;
    }

    protected function contentTypeToArray($contentType)
    {
        $matches = explode(';', trim(strtolower($contentType)));
        if (isset($matches[1])) {
            $matches[1] = explode('=', $matches[1]);
            // strip 'charset='
            $matches[1] = isset($matches[1][1]) && trim($matches[1][1]) ? $matches[1][1] : $matches[1][0];
        } else {
            $matches[1] = null;
        }

        return $matches;
    }

    /**
     * @param $markup
     *
     * @return array contentType, charset
     */
    protected function contentTypeFromHTML($markup)
    {
        $matches = array();
        // find meta tag
        preg_match('@<meta[^>]+http-equiv\\s*=\\s*(["|\'])Content-Type\\1([^>]+?)>@i', $markup, $matches
        );
        if (!isset($matches[0])) {
            return array(null, null);
        }
        // get attr 'content'
        preg_match('@content\\s*=\\s*(["|\'])(.+?)\\1@', $matches[0], $matches);
        if (!isset($matches[0])) {
            return array(null, null);
        }

        return $this->contentTypeToArray($matches[2]);
    }

    protected function charsetFromHTML($markup)
    {
        $contentType = $this->contentTypeFromHTML($markup);

        return $contentType[1];
    }

    protected function charsetFromXML($markup)
    {
        $matches;
        // find declaration
        preg_match('@<'.'?xml[^>]+encoding\\s*=\\s*(["|\'])(.*?)\\1@i', $markup, $matches
        );

        return isset($matches[2]) ? strtolower($matches[2]) : null;
    }

    /**
     * Repositions meta[type=charset] at the start of head. Bypasses DOMDocument bug.
     *
     * @link http://code.google.com/p/phpquery/issues/detail?id=80
     *
     * @param $html
     */
    protected function charsetFixHTML($markup)
    {
        $matches = array();
        // find meta tag
        preg_match('@\s*<meta[^>]+http-equiv\\s*=\\s*(["|\'])Content-Type\\1([^>]+?)>@i', $markup, $matches, PREG_OFFSET_CAPTURE
        );
        if (!isset($matches[0])) {
            return;
        }
        $metaContentType = $matches[0][0];
        $markup = substr($markup, 0, $matches[0][1])
                .substr($markup, $matches[0][1] + strlen($metaContentType));
        $headStart = stripos($markup, '<head>');
        $markup = substr($markup, 0, $headStart + 6).$metaContentType
                .substr($markup, $headStart + 6);

        return $markup;
    }

    protected function charsetAppendToHTML($html, $charset, $xhtml = false)
    {
     // return $html;

     // sry it break
        // remove existing meta[type=content-type]
        $html = preg_replace('@\s*<meta[^>]+http-equiv\\s*=\\s*(["|\'])Content-Type\\1([^>]+?)>@i', '', $html);
        $meta = '<meta http-equiv="Content-Type" content="text/html;charset='
                .$charset.'" '
                .($xhtml ? '/' : '')
                .'>';
        if (strpos($html, '<head>') === false) {
            if (strpos($html, '<html') === false) {
                return $meta.$html;
            } else {
                return preg_replace(
                                '@<html(.*?)(?(?<!\?)>)@s', "<html\\1><head>{$meta}</head>", $html
                );
            }
        } else {
           // return $html;

            //   /<head[^>]*>[\s\S]*<\/head>/gi)
            // orig  '@<head(.*?)(?(?<!\?)>)@s'

            //   "/<head>s*(.*?)<\/head>/i";
            return preg_replace(
                "@<head>s*(.*?)@s", '<head\\1>'.$meta, $html
            );
// here bug tyka
//            return preg_replace(
//                            '@<head(.*?)(?(?<!\?)>)@s', '<head\\1>'.$meta, $html
//            );
        }
    }

    protected function charsetAppendToXML($markup, $charset)
    {
        $declaration = '<'.'?xml version="1.0" encoding="'.$charset.'"?'.'>';

        return $declaration.$markup;
    }

    public static function isDocumentFragmentHTML($markup)
    {
        return stripos($markup, '<html') === false && stripos($markup, '<!doctype') === false;
    }

    public static function isDocumentFragmentXML($markup)
    {
        return stripos($markup, '<'.'?xml') === false;
    }

    public static function isDocumentFragmentXHTML($markup)
    {
        return self::isDocumentFragmentHTML($markup);
    }

    public function importAttr($value)
    {
        // TODO
    }

    /**
     * @param $source
     * @param $target
     * @param $sourceCharset
     *
     * @return array Array of imported nodes.
     */
    public function import($source, $sourceCharset = null)
    {
        // TODO charset conversions
        $return = array();
        if ($source instanceof DOMNODE && !($source instanceof DOMNODELIST)) {
            $source = array($source);
        }
        //		if (is_array($source)) {
        //			foreach($source as $node) {
        //				if (is_string($node)) {
        //					// string markup
        //					$fake = $this->documentFragmentCreate($node, $sourceCharset);
        //					if ($fake === false)
        //						throw new Exception("Error loading documentFragment markup");
        //					else
        //						$return = array_merge($return,
        //							$this->import($fake->root->childNodes)
        //						);
        //				} else {
        //					$return[] = $this->document->importNode($node, true);
        //				}
        //			}
        //			return $return;
        //		} else {
        //			// string markup
        //			$fake = $this->documentFragmentCreate($source, $sourceCharset);
        //			if ($fake === false)
        //				throw new Exception("Error loading documentFragment markup");
        //			else
        //				return $this->import($fake->root->childNodes);
        //		}
        if (is_array($source) || $source instanceof DOMNODELIST) {
            // dom nodes
            self::debug('Importing nodes to document');
            foreach ($source as $node) {
                $return[] = $this->document->importNode($node, true);
            }
        } else {
            // string markup
            $fake = $this->documentFragmentCreate($source, $sourceCharset);
            if ($fake === false) {
                throw new Exception('Error loading documentFragment markup');
            } else {
                return $this->import($fake->root->childNodes);
            }
        }

        return $return;
    }

    /**
     * Creates new document fragment.
     *
     * @param $source
     *
     * @return DOMDocumentWrapper
     */
    protected function documentFragmentCreate($source, $charset = null)
    {
        $fake = new self();
        $fake->contentType = $this->contentType;
        $fake->isXML = $this->isXML;
        $fake->isHTML = $this->isHTML;
        $fake->isXHTML = $this->isXHTML;
        $fake->root = $fake->document;
        if (!$charset) {
            $charset = $this->charset;
        }
        //	$fake->documentCreate($this->charset);
        if ($source instanceof DOMNODE && !($source instanceof DOMNODELIST)) {
            $source = array($source);
        }
        if (is_array($source) || $source instanceof DOMNODELIST) {
            // dom nodes
            // load fake document
            if (!$this->documentFragmentLoadMarkup($fake, $charset)) {
                return false;
            }
            $nodes = $fake->import($source);
            foreach ($nodes as $node) {
                $fake->root->appendChild($node);
            }
        } else {
            // string markup
            $this->documentFragmentLoadMarkup($fake, $charset, $source);
        }

        return $fake;
    }

    /**
     * @param $document DOMDocumentWrapper
     * @param $markup
     *
     * @return $document
     */
    private function documentFragmentLoadMarkup($fragment, $charset, $markup = null)
    {
        // TODO error handling
        // TODO copy doctype
        // tempolary turn off
        $fragment->isDocumentFragment = false;
        if ($fragment->isXML) {
            if ($fragment->isXHTML) {
                // add FAKE element to set default namespace
                $fragment->loadMarkupXML('<?xml version="1.0" encoding="'.$charset.'"?>'
                        .'<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" '
                        .'"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">'
                        .'<fake xmlns="http://www.w3.org/1999/xhtml">'.$markup.'</fake>');
                $fragment->root = $fragment->document->firstChild->nextSibling;
            } else {
                $fragment->loadMarkupXML('<?xml version="1.0" encoding="'.$charset.'"?><fake>'.$markup.'</fake>');
                $fragment->root = $fragment->document->firstChild;
            }
        } else {
            $markup2 = phpQuery::$defaultDoctype.'<html><head><meta http-equiv="Content-Type" content="text/html;charset='
                    .$charset.'"></head>';
            $noBody = strpos($markup, '<body') === false;
            if ($noBody) {
                $markup2 .= '<body>';
            }
            $markup2 .= $markup;
            if ($noBody) {
                $markup2 .= '</body>';
            }
            $markup2 .= '</html>';
            $fragment->loadMarkupHTML($markup2);
            // TODO resolv body tag merging issue
            $fragment->root = $noBody ? $fragment->document->firstChild->nextSibling->firstChild->nextSibling : $fragment->document->firstChild->nextSibling->firstChild->nextSibling;
        }
        if (!$fragment->root) {
            return false;
        }
        $fragment->isDocumentFragment = true;

        return true;
    }

    protected function documentFragmentToMarkup($fragment)
    {
        phpQuery::debug('documentFragmentToMarkup');
        $tmp = $fragment->isDocumentFragment;
        $fragment->isDocumentFragment = false;
        $markup = $fragment->markup();
        if ($fragment->isXML) {
            $markup = substr($markup, 0, strrpos($markup, '</fake>'));
            if ($fragment->isXHTML) {
                $markup = substr($markup, strpos($markup, '<fake') + 43);
            } else {
                $markup = substr($markup, strpos($markup, '<fake>') + 6);
            }
        } else {
            $markup = substr($markup, strpos($markup, '<body>') + 6);
            $markup = substr($markup, 0, strrpos($markup, '</body>'));
        }
        $fragment->isDocumentFragment = $tmp;
        if (phpQuery::$debug) {
            phpQuery::debug('documentFragmentToMarkup: '.substr($markup, 0, 150));
        }

        return $markup;
    }

    /**
     * Return document markup, starting with optional $nodes as root.
     *
     * @param $nodes	DOMNode|DOMNodeList
     *
     * @return string
     */
    public function markup($nodes = null, $innerMarkup = false)
    {
        if (isset($nodes) && count($nodes) == 1 && $nodes[0] instanceof DOMDOCUMENT) {
            $nodes = null;
        }
        if (isset($nodes)) {
            $markup = '';
            if (!is_array($nodes) && !($nodes instanceof DOMNODELIST)) {
                $nodes = array($nodes);
            }
            if ($this->isDocumentFragment && !$innerMarkup) {
                foreach ($nodes as $i => $node) {
                    if ($node->isSameNode($this->root)) {
                        //	var_dump($node);
                        $nodes = array_slice($nodes, 0, $i)
                                + phpQuery::DOMNodeListToArray($node->childNodes)
                                + array_slice($nodes, $i + 1);
                    }
                }
            }
            if ($this->isXML && !$innerMarkup) {
                self::debug("Getting outerXML with charset '{$this->charset}'");
                // we need outerXML, so we can benefit from
                // $node param support in saveXML()
                foreach ($nodes as $node) {
                    $markup .= $this->document->saveXML($node);
                }
            } else {
                $loop = array();
                if ($innerMarkup) {
                    foreach ($nodes as $node) {
                        if ($node->childNodes) {
                            foreach ($node->childNodes as $child) {
                                $loop[] = $child;
                            }
                        } else {
                            $loop[] = $node;
                        }
                    }
                } else {
                    $loop = $nodes;
                }
                self::debug('Getting markup, moving selected nodes ('.count($loop).') to new DocumentFragment');
                $fake = $this->documentFragmentCreate($loop);
                $markup = $this->documentFragmentToMarkup($fake);
            }
            if ($this->isXHTML) {
                self::debug('Fixing XHTML');
                $markup = self::markupFixXHTML($markup);
            }
            self::debug('Markup: '.substr($markup, 0, 250));

            return $markup;
        } else {
            if ($this->isDocumentFragment) {
                // documentFragment, html only...
                self::debug('Getting markup, DocumentFragment detected');
                //				return $this->markup(
                ////					$this->document->getElementsByTagName('body')->item(0)
                //					$this->document->root, true
                //				);
                $markup = $this->documentFragmentToMarkup($this);
                // no need for markupFixXHTML, as it's done thought markup($nodes) method
                return $markup;
            } else {
                self::debug('Getting markup ('.($this->isXML ? 'XML' : 'HTML')."), final with charset '{$this->charset}'");
                $markup = $this->isXML ? $this->document->saveXML() : $this->document->saveHTML();
                if ($this->isXHTML) {
                    self::debug('Fixing XHTML');
                    $markup = self::markupFixXHTML($markup);
                }
                self::debug('Markup: '.substr($markup, 0, 250));

                return $markup;
            }
        }
    }

    protected static function markupFixXHTML($markup)
    {
        $markup = self::expandEmptyTag('script', $markup);
        $markup = self::expandEmptyTag('select', $markup);
        $markup = self::expandEmptyTag('textarea', $markup);

        return $markup;
    }

    public static function debug($text)
    {
        phpQuery::debug($text);
    }

    /**
     * expandEmptyTag.
     *
     * @param $tag
     * @param $xml
     *
     * @return unknown_type
     *
     * @author mjaque at ilkebenson dot com
     *
     * @link http://php.net/manual/en/domdocument.savehtml.php#81256
     */
    public static function expandEmptyTag($tag, $xml)
    {
        $indice = 0;
        while ($indice < strlen($xml)) {
            $pos = strpos($xml, "<$tag ", $indice);
            if ($pos) {
                $posCierre = strpos($xml, '>', $pos);
                if ($xml[$posCierre - 1] == '/') {
                    $xml = substr_replace($xml, "></$tag>", $posCierre - 1, 2);
                }
                $indice = $posCierre;
            } else {
                break;
            }
        }

        return $xml;
    }
}

/**
 * Event handling class.
 *
 * @author Tobiasz Cudnik
 * @static
 */
abstract class phpQueryEvents
{
    /**
     * Trigger a type of event on every matched element.
     *
     * @param DOMNode|phpQueryObject|string $document
     * @param unknown_type                  $type
     * @param unknown_type                  $data
     *
     * @TODO exclusive events (with !)
     * @TODO global events (test)
     * @TODO support more than event in $type (space-separated)
     */
    public static function trigger($document, $type, $data = array(), $node = null)
    {
        // trigger: function(type, data, elem, donative, extra) {
        $documentID = phpQuery::getDocumentID($document);
        $namespace = null;
        if (strpos($type, '.') !== false) {
            list($name, $namespace) = explode('.', $type);
        } else {
            $name = $type;
        }
        if (!$node) {
            if (self::issetGlobal($documentID, $type)) {
                $pq = phpQuery::getDocument($documentID);
                // TODO check add($pq->document)
                $pq->find('*')->add($pq->document)
                        ->trigger($type, $data);
            }
        } else {
            if (isset($data[0]) && $data[0] instanceof DOMEvent) {
                $event = $data[0];
                $event->relatedTarget = $event->target;
                $event->target = $node;
                $data = array_slice($data, 1);
            } else {
                $event = new DOMEvent(array(
                            'type' => $type,
                            'target' => $node,
                            'timeStamp' => time(),
                        ));
            }
            $i = 0;
            while ($node) {
                // TODO whois
                phpQuery::debug('Triggering '.($i ? 'bubbled ' : '')."event '{$type}' on "
                        ."node \n"); //.phpQueryObject::whois($node)."\n");
                $event->currentTarget = $node;
                $eventNode = self::getNode($documentID, $node);
                if (isset($eventNode->eventHandlers)) {
                    foreach ($eventNode->eventHandlers as $eventType => $handlers) {
                        $eventNamespace = null;
                        if (strpos($type, '.') !== false) {
                            list($eventName, $eventNamespace) = explode('.', $eventType);
                        } else {
                            $eventName = $eventType;
                        }
                        if ($name != $eventName) {
                            continue;
                        }
                        if ($namespace && $eventNamespace && $namespace != $eventNamespace) {
                            continue;
                        }
                        foreach ($handlers as $handler) {
                            phpQuery::debug("Calling event handler\n");
                            $event->data = $handler['data'] ? $handler['data'] : null;
                            $params = array_merge(array($event), $data);
                            $return = phpQuery::callbackRun($handler['callback'], $params);
                            if ($return === false) {
                                $event->bubbles = false;
                            }
                        }
                    }
                }
                // to bubble or not to bubble...
                if (!$event->bubbles) {
                    break;
                }
                $node = $node->parentNode;
                ++$i;
            }
        }
    }

    /**
     * Binds a handler to one or more events (like click) for each matched element.
     * Can also bind custom events.
     *
     * @param DOMNode|phpQueryObject|string $document
     * @param unknown_type                  $type
     * @param unknown_type                  $data     Optional
     * @param unknown_type                  $callback
     *
     * @TODO support '!' (exclusive) events
     * @TODO support more than event in $type (space-separated)
     * @TODO support binding to global events
     */
    public static function add($document, $node, $type, $data, $callback = null)
    {
        phpQuery::debug("Binding '$type' event");
        $documentID = phpQuery::getDocumentID($document);
        //		if (is_null($callback) && is_callable($data)) {
        //			$callback = $data;
        //			$data = null;
        //		}
        $eventNode = self::getNode($documentID, $node);
        if (!$eventNode) {
            $eventNode = self::setNode($documentID, $node);
        }
        if (!isset($eventNode->eventHandlers[$type])) {
            $eventNode->eventHandlers[$type] = array();
        }
        $eventNode->eventHandlers[$type][] = array(
            'callback' => $callback,
            'data' => $data,
        );
    }

    /**
     * Enter description here...
     *
     * @param DOMNode|phpQueryObject|string $document
     * @param unknown_type                  $type
     * @param unknown_type                  $callback
     *
     * @TODO namespace events
     * @TODO support more than event in $type (space-separated)
     */
    public static function remove($document, $node, $type = null, $callback = null)
    {
        $documentID = phpQuery::getDocumentID($document);
        $eventNode = self::getNode($documentID, $node);
        if (is_object($eventNode) && isset($eventNode->eventHandlers[$type])) {
            if ($callback) {
                foreach ($eventNode->eventHandlers[$type] as $k => $handler) {
                    if ($handler['callback'] == $callback) {
                        unset($eventNode->eventHandlers[$type][$k]);
                    }
                }
            } else {
                unset($eventNode->eventHandlers[$type]);
            }
        }
    }

    protected static function getNode($documentID, $node)
    {
        foreach (phpQuery::$documents[$documentID]->eventsNodes as $eventNode) {
            if ($node->isSameNode($eventNode)) {
                return $eventNode;
            }
        }
    }

    protected static function setNode($documentID, $node)
    {
        phpQuery::$documents[$documentID]->eventsNodes[] = $node;

        return phpQuery::$documents[$documentID]->eventsNodes[
                count(phpQuery::$documents[$documentID]->eventsNodes) - 1
        ];
    }

    protected static function issetGlobal($documentID, $type)
    {
        return isset(phpQuery::$documents[$documentID]) ? in_array($type, phpQuery::$documents[$documentID]->eventsGlobal) : false;
    }
}

interface ICallbackNamed
{
    public function hasName();

    public function getName();
}

/**
 * Callback class introduces currying-like pattern.
 *
 * Example:
 * function foo($param1, $param2, $param3) {
 *   var_dump($param1, $param2, $param3);
 * }
 * $fooCurried = new Callback('foo',
 *   'param1 is now statically set',
 *   new CallbackParam, new CallbackParam
 * );
 * phpQuery::callbackRun($fooCurried,
 * 	array('param2 value', 'param3 value'
 * );
 *
 * Callback class is supported in all phpQuery methods which accepts callbacks.
 *
 * @link http://code.google.com/p/phpquery/wiki/Callbacks#Param_Structures
 *
 * @author Tobiasz Cudnik <tobiasz.cudnik/gmail.com>
 *
 * @TODO??? return fake forwarding function created via create_function
 * @TODO honor paramStructure
 */
class Callback implements ICallbackNamed
{
    public $callback = null;
    public $params = null;
    protected $name;

    public function __construct($callback, $param1 = null, $param2 = null, $param3 = null)
    {
        $params = func_get_args();
        $params = array_slice($params, 1);
        if ($callback instanceof self) {
            // TODO implement recurention
        } else {
            $this->callback = $callback;
            $this->params = $params;
        }
    }

    public function getName()
    {
        return 'Callback: '.$this->name;
    }

    public function hasName()
    {
        return isset($this->name) && $this->name;
    }

    public function setName($name)
    {
        $this->name = $name;

        return $this;
    }

    // TODO test me
    //	public function addParams() {
    //		$params = func_get_args();
    //		return new Callback($this->callback, $this->params+$params);
    //	}
}

/**
 * Shorthand for new Callback(create_function(...), ...);.
 *
 * @author Tobiasz Cudnik <tobiasz.cudnik/gmail.com>
 */
class CallbackBody extends Callback
{
    public function __construct($paramList, $code, $param1 = null, $param2 = null, $param3 = null)
    {
        $params = func_get_args();
        $params = array_slice($params, 2);
        $this->callback = create_function($paramList, $code);
        $this->params = $params;
    }
}

/**
 * Callback type which on execution returns reference passed during creation.
 *
 * @author Tobiasz Cudnik <tobiasz.cudnik/gmail.com>
 */
class CallbackReturnReference extends Callback implements ICallbackNamed
{
    protected $reference;

    public function __construct(&$reference, $name = null)
    {
        $this->reference = &$reference;
        $this->callback = array($this, 'callback');
    }

    public function callback()
    {
        return $this->reference;
    }

    public function getName()
    {
        return 'Callback: '.$this->name;
    }

    public function hasName()
    {
        return isset($this->name) && $this->name;
    }
}

/**
 * Callback type which on execution returns value passed during creation.
 *
 * @author Tobiasz Cudnik <tobiasz.cudnik/gmail.com>
 */
class CallbackReturnValue extends Callback implements ICallbackNamed
{
    protected $value;
    protected $name;

    public function __construct($value, $name = null)
    {
        $this->value = &$value;
        $this->name = $name;
        $this->callback = array($this, 'callback');
    }

    public function callback()
    {
        return $this->value;
    }

    public function __toString()
    {
        return $this->getName();
    }

    public function getName()
    {
        return 'Callback: '.$this->name;
    }

    public function hasName()
    {
        return isset($this->name) && $this->name;
    }
}

/**
 * CallbackParameterToReference can be used when we don't really want a callback,
 * only parameter passed to it. CallbackParameterToReference takes first
 * parameter's value and passes it to reference.
 *
 * @author Tobiasz Cudnik <tobiasz.cudnik/gmail.com>
 */
class CallbackParameterToReference extends Callback
{
    /**
     * @param $reference
     * @TODO implement $paramIndex;
     * param index choose which callback param will be passed to reference
     */
    public function __construct(&$reference)
    {
        $this->callback = &$reference;
    }
}

//class CallbackReference extends Callback {
//	/**
//	 *
//	 * @param $reference
//	 * @param $paramIndex
//	 * @todo implement $paramIndex; param index choose which callback param will be passed to reference
//	 */
//	public function __construct(&$reference, $name = null){
//		$this->callback =& $reference;
//	}
//}
class CallbackParam
{
}

/**
 * Class representing phpQuery objects.
 *
 * @author Tobiasz Cudnik <tobiasz.cudnik/gmail.com>
 *
 * @method phpQueryObject clone() clone()
 * @method phpQueryObject empty() empty()
 * @method phpQueryObject next() next($selector = null)
 * @method phpQueryObject prev() prev($selector = null)
 *
 * @property int $length
 */
class phpQueryObject implements \Iterator, \Countable, \ArrayAccess
{
    public $documentID = null;

    /**
     * DOMDocument class.
     *
     * @var DOMDocument
     */
    public $document = null;
    public $charset = null;

    /**
     * @var DOMDocumentWrapper
     */
    public $documentWrapper = null;

    /**
     * XPath interface.
     *
     * @var DOMXPath
     */
    public $xpath = null;

    /**
     * Stack of selected elements.
     *
     * @TODO refactor to ->nodes
     *
     * @var array
     */
    public $elements = array();

    /**
     */
    protected $elementsBackup = array();

    /**
     */
    protected $previous = null;

    /**
     * @TODO deprecate
     */
    protected $root = array();

    /**
     * Indicated if doument is just a fragment (no <html> tag).
     *
     * Every document is realy a full document, so even documentFragments can
     * be queried against <html>, but getDocument(id)->htmlOuter() will return
     * only contents of <body>.
     *
     * @var bool
     */
    public $documentFragment = true;

    /**
     * Iterator interface helper.
     */
    protected $elementsInterator = array();

    /**
     * Iterator interface helper.
     */
    protected $valid = false;

    /**
     * Iterator interface helper.
     */
    protected $current = null;

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function __construct($documentID)
    {
        //		if ($documentID instanceof self)
        //			var_dump($documentID->getDocumentID());
        $id = $documentID instanceof self ? $documentID->getDocumentID() : $documentID;
        //		var_dump($id);
        if (!isset(phpQuery::$documents[$id])) {
            //			var_dump(phpQuery::$documents);
            throw new Exception("Document with ID '{$id}' isn't loaded. Use phpQuery::newDocument(\$html) or phpQuery::newDocumentFile(\$file) first.");
        }
        $this->documentID = $id;
        $this->documentWrapper = &phpQuery::$documents[$id];
        $this->document = &$this->documentWrapper->document;
        $this->xpath = &$this->documentWrapper->xpath;
        $this->charset = &$this->documentWrapper->charset;
        $this->documentFragment = &$this->documentWrapper->isDocumentFragment;
        // TODO check $this->DOM->documentElement;
        //		$this->root = $this->document->documentElement;
        $this->root = &$this->documentWrapper->root;
        //		$this->toRoot();
        $this->elements = array($this->root);
    }

    public function __destruct()
    {
    }

    /**
     * @param $attr
     *
     * @return unknown_type
     */
    public function __get($attr)
    {
        switch ($attr) {
            // FIXME doesnt work at all ?
            case 'length':
                return $this->size();
                break;
            default:
                return $this->$attr;
        }
    }

    /**
     * Saves actual object to $var by reference.
     * Useful when need to break chain.
     *
     * @param phpQueryObject $var
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function toReference(&$var)
    {
        return $var = $this;
    }

    public function documentFragment($state = null)
    {
        if ($state) {
            phpQuery::$documents[$this->getDocumentID()]['documentFragment'] = $state;

            return $this;
        }

        return $this->documentFragment;
    }

    /**
     * @TODO documentWrapper
     */
    protected function isRoot($node)
    {
        //		return $node instanceof DOMDOCUMENT || $node->tagName == 'html';
        return $node instanceof DOMDOCUMENT
                || ($node instanceof DOMELEMENT && $node->tagName == 'html')
                || $this->root->isSameNode($node);
    }

    /**
     */
    protected function stackIsRoot()
    {
        return $this->size() == 1 && $this->isRoot($this->elements[0]);
    }

    /**
     * Enter description here...
     * NON JQUERY METHOD.
     *
     * Watch out, it doesn't creates new instance, can be reverted with end().
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function toRoot()
    {
        $this->elements = array($this->root);

        return $this;
        //		return $this->newInstance(array($this->root));
    }

    /**
     * Saves object's DocumentID to $var by reference.
     * <code>
     * $myDocumentId;
     * phpQuery::newDocument('<div/>')
     *     ->getDocumentIDRef($myDocumentId)
     *     ->find('div')->...
     * </code>.
     *
     * @param unknown_type $domId
     *
     * @see phpQuery::newDocument
     * @see phpQuery::newDocumentFile
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function getDocumentIDRef(&$documentID)
    {
        $documentID = $this->getDocumentID();

        return $this;
    }

    /**
     * Returns object with stack set to document root.
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function getDocument()
    {
        return phpQuery::getDocument($this->getDocumentID());
    }

    /**
     * @return DOMDocument
     */
    public function getDOMDocument()
    {
        return $this->document;
    }

    /**
     * Get object's Document ID.
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function getDocumentID()
    {
        return $this->documentID;
    }

    /**
     * Unloads whole document from memory.
     * CAUTION! None further operations will be possible on this document.
     * All objects refering to it will be useless.
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function unloadDocument()
    {
        phpQuery::unloadDocuments($this->getDocumentID());
    }

    public function isHTML()
    {
        return $this->documentWrapper->isHTML;
    }

    public function isXHTML()
    {
        return $this->documentWrapper->isXHTML;
    }

    public function isXML()
    {
        return $this->documentWrapper->isXML;
    }

    /**
     * Enter description here...
     *
     * @link http://docs.jquery.com/Ajax/serialize
     *
     * @return string
     */
    public function serialize()
    {
        return phpQuery::param($this->serializeArray());
    }

    /**
     * Enter description here...
     *
     * @link http://docs.jquery.com/Ajax/serializeArray
     *
     * @return array
     */
    public function serializeArray($submit = null)
    {
        $source = $this->filter('form, input, select, textarea')
                ->find('input, select, textarea')
                ->andSelf()
                ->not('form');
        $return = array();
        //		$source->dumpDie();
        foreach ($source as $input) {
            $input = phpQuery::pq($input);
            if ($input->is('[disabled]')) {
                continue;
            }
            if (!$input->is('[name]')) {
                continue;
            }
            if ($input->is('[type=checkbox]') && !$input->is('[checked]')) {
                continue;
            }
            // jquery diff
            if ($submit && $input->is('[type=submit]')) {
                if ($submit instanceof DOMELEMENT && !$input->elements[0]->isSameNode($submit)) {
                    continue;
                } elseif (is_string($submit) && $input->attr('name') != $submit) {
                    continue;
                }
            }
            $return[] = array(
                'name' => $input->attr('name'),
                'value' => $input->val(),
            );
        }

        return $return;
    }

    /**
     */
    protected function debug($in)
    {
        if (!phpQuery::$debug) {
            return;
        }
        echo '<pre>';
        print_r($in);
        // file debug
        //		file_put_contents(dirname(__FILE__).'/phpQuery.log', print_r($in, true)."\n", FILE_APPEND);
        // quite handy debug trace
        //		if ( is_array($in))
        //			print_r(array_slice(debug_backtrace(), 3));
        echo "</pre>\n";
    }

    /**
     */
    protected function isRegexp($pattern)
    {
        return in_array(
                        $pattern[mb_strlen($pattern) - 1], array('^', '*', '$')
        );
    }

    /**
     * Determines if $char is really a char.
     *
     * @param string $char
     *
     * @return bool
     *
     * @todo rewrite me to charcode range ! ;)
     */
    protected function isChar($char)
    {
        return extension_loaded('mbstring') && phpQuery::$mbstringSupport ? mb_eregi('\w', $char) : preg_match('@\w@', $char);
    }

    /**
     */
    protected function parseSelector($query)
    {
        // clean spaces
        // TODO include this inside parsing ?
        $query = trim(
                preg_replace('@\s+@', ' ', preg_replace('@\s*(>|\\+|~)\s*@', '\\1', $query)
                )
        );
        $queries = array(array());
        if (!$query) {
            return $queries;
        }
        $return = &$queries[0];
        $specialChars = array('>', ' ');
        //		$specialCharsMapping = array('/' => '>');
        $specialCharsMapping = array();
        $strlen = mb_strlen($query);
        $classChars = array('.', '-');
        $pseudoChars = array('-');
        $tagChars = array('*', '|', '-');
        // split multibyte string
        // http://code.google.com/p/phpquery/issues/detail?id=76
        $_query = array();
        for ($i = 0; $i < $strlen; ++$i) {
            $_query[] = mb_substr($query, $i, 1);
        }
        $query = $_query;
        // it works, but i dont like it...
        $i = 0;
        while ($i < $strlen) {
            $c = $query[$i];
            $tmp = '';
            // TAG
            if ($this->isChar($c) || in_array($c, $tagChars)) {
                while (isset($query[$i])
                && ($this->isChar($query[$i]) || in_array($query[$i], $tagChars))) {
                    $tmp .= $query[$i];
                    ++$i;
                }
                $return[] = $tmp;
                // IDs
            } elseif ($c == '#') {
                ++$i;
                while (isset($query[$i]) && ($this->isChar($query[$i]) || $query[$i] == '-')) {
                    $tmp .= $query[$i];
                    ++$i;
                }
                $return[] = '#'.$tmp;
                // SPECIAL CHARS
            } elseif (in_array($c, $specialChars)) {
                $return[] = $c;
                ++$i;
                // MAPPED SPECIAL MULTICHARS
                //			} else if ( $c.$query[$i+1] == '//') {
                //				$return[] = ' ';
                //				$i = $i+2;
                // MAPPED SPECIAL CHARS
            } elseif (isset($specialCharsMapping[$c])) {
                $return[] = $specialCharsMapping[$c];
                ++$i;
                // COMMA
            } elseif ($c == ',') {
                $queries[] = array();
                $return = &$queries[count($queries) - 1];
                ++$i;
                while (isset($query[$i]) && $query[$i] == ' ') {
                    $i++;
                }
                // CLASSES
            } elseif ($c == '.') {
                while (isset($query[$i]) && ($this->isChar($query[$i]) || in_array($query[$i], $classChars))) {
                    $tmp .= $query[$i];
                    ++$i;
                }
                $return[] = $tmp;
                // ~ General Sibling Selector
            } elseif ($c == '~') {
                $spaceAllowed = true;
                $tmp .= $query[$i++];
                while (isset($query[$i])
                && ($this->isChar($query[$i])
                || in_array($query[$i], $classChars)
                || $query[$i] == '*'
                || ($query[$i] == ' ' && $spaceAllowed)
                )) {
                    if ($query[$i] != ' ') {
                        $spaceAllowed = false;
                    }
                    $tmp .= $query[$i];
                    ++$i;
                }
                $return[] = $tmp;
                // + Adjacent sibling selectors
            } elseif ($c == '+') {
                $spaceAllowed = true;
                $tmp .= $query[$i++];
                while (isset($query[$i])
                && ($this->isChar($query[$i])
                || in_array($query[$i], $classChars)
                || $query[$i] == '*'
                || ($spaceAllowed && $query[$i] == ' ')
                )) {
                    if ($query[$i] != ' ') {
                        $spaceAllowed = false;
                    }
                    $tmp .= $query[$i];
                    ++$i;
                }
                $return[] = $tmp;
                // ATTRS
            } elseif ($c == '[') {
                $stack = 1;
                $tmp .= $c;
                while (isset($query[++$i])) {
                    $tmp .= $query[$i];
                    if ($query[$i] == '[') {
                        ++$stack;
                    } elseif ($query[$i] == ']') {
                        --$stack;
                        if (!$stack) {
                            break;
                        }
                    }
                }
                $return[] = $tmp;
                ++$i;
                // PSEUDO CLASSES
            } elseif ($c == ':') {
                $stack = 1;
                $tmp .= $query[$i++];
                while (isset($query[$i]) && ($this->isChar($query[$i]) || in_array($query[$i], $pseudoChars))) {
                    $tmp .= $query[$i];
                    ++$i;
                }
                // with arguments ?
                if (isset($query[$i]) && $query[$i] == '(') {
                    $tmp .= $query[$i];
                    $stack = 1;
                    while (isset($query[++$i])) {
                        $tmp .= $query[$i];
                        if ($query[$i] == '(') {
                            ++$stack;
                        } elseif ($query[$i] == ')') {
                            --$stack;
                            if (!$stack) {
                                break;
                            }
                        }
                    }
                    $return[] = $tmp;
                    ++$i;
                } else {
                    $return[] = $tmp;
                }
            } else {
                ++$i;
            }
        }
        foreach ($queries as $k => $q) {
            if (isset($q[0])) {
                if (isset($q[0][0]) && $q[0][0] == ':') {
                    array_unshift($queries[$k], '*');
                }
                if ($q[0] != '>') {
                    array_unshift($queries[$k], ' ');
                }
            }
        }

        return $queries;
    }

    /**
     * Return matched DOM nodes.
     *
     * @param int $index
     *
     * @return array|DOMElement Single DOMElement or array of DOMElement.
     */
    public function get($index = null, $callback1 = null, $callback2 = null, $callback3 = null)
    {
        $return = isset($index) ? (isset($this->elements[$index]) ? $this->elements[$index] : null) : $this->elements;
        // pass thou callbacks
        $args = func_get_args();
        $args = array_slice($args, 1);
        foreach ($args as $callback) {
            if (is_array($return)) {
                foreach ($return as $k => $v) {
                    $return[$k] = phpQuery::callbackRun($callback, array($v));
                }
            } else {
                $return = phpQuery::callbackRun($callback, array($return));
            }
        }

        return $return;
    }

    /**
     * Return matched DOM nodes.
     * jQuery difference.
     *
     * @param int $index
     *
     * @return array|string Returns string if $index != null
     *
     * @todo implement callbacks
     * @todo return only arrays ?
     * @todo maybe other name...
     */
    public function getString($index = null, $callback1 = null, $callback2 = null, $callback3 = null)
    {
        if ($index) {
            $return = $this->eq($index)->text();
        } else {
            $return = array();
            for ($i = 0; $i < $this->size(); ++$i) {
                $return[] = $this->eq($i)->text();
            }
        }
        // pass thou callbacks
        $args = func_get_args();
        $args = array_slice($args, 1);
        foreach ($args as $callback) {
            $return = phpQuery::callbackRun($callback, array($return));
        }

        return $return;
    }

    /**
     * Return matched DOM nodes.
     * jQuery difference.
     *
     * @param int $index
     *
     * @return array|string Returns string if $index != null
     *
     * @todo implement callbacks
     * @todo return only arrays ?
     * @todo maybe other name...
     */
    public function getStrings($index = null, $callback1 = null, $callback2 = null, $callback3 = null)
    {
        if ($index) {
            $return = $this->eq($index)->text();
        } else {
            $return = array();
            for ($i = 0; $i < $this->size(); ++$i) {
                $return[] = $this->eq($i)->text();
            }
            // pass thou callbacks
            $args = func_get_args();
            $args = array_slice($args, 1);
        }
        foreach ($args as $callback) {
            if (is_array($return)) {
                foreach ($return as $k => $v) {
                    $return[$k] = phpQuery::callbackRun($callback, array($v));
                }
            } else {
                $return = phpQuery::callbackRun($callback, array($return));
            }
        }

        return $return;
    }

    /**
     * Returns new instance of actual class.
     *
     * @param array $newStack Optional. Will replace old stack with new and move old one to history.c
     */
    public function newInstance($newStack = null)
    {
        $class = get_class($this);
        // support inheritance by passing old object to overloaded constructor
        $new = $class != 'phpQuery' ? new $class($this, $this->getDocumentID()) : new self($this->getDocumentID());
        $new->previous = $this;
        if (is_null($newStack)) {
            $new->elements = $this->elements;
            if ($this->elementsBackup) {
                $this->elements = $this->elementsBackup;
            }
        } elseif (is_string($newStack)) {
            $new->elements = phpQuery::pq($newStack, $this->getDocumentID())->stack();
        } else {
            $new->elements = $newStack;
        }

        return $new;
    }

    /**
     * Enter description here...
     *
     * In the future, when PHP will support XLS 2.0, then we would do that this way:
     * contains(tokenize(@class, '\s'), "something")
     *
     * @param unknown_type $class
     * @param unknown_type $node
     *
     * @return bool
     */
    protected function matchClasses($class, $node)
    {
        // multi-class
        if (mb_strpos($class, '.', 1)) {
            $classes = explode('.', substr($class, 1));
            $classesCount = count($classes);
            $nodeClasses = explode(' ', $node->getAttribute('class'));
            $nodeClassesCount = count($nodeClasses);
            if ($classesCount > $nodeClassesCount) {
                return false;
            }
            $diff = count(
                    array_diff(
                            $classes, $nodeClasses
                    )
            );
            if (!$diff) {
                return true;
            }
            // single-class
        } else {
            return in_array(
                            // strip leading dot from class name
                            substr($class, 1),
                            // get classes for element as array
                            explode(' ', $node->getAttribute('class'))
            );
        }
    }

    /**
     */
    protected function runQuery($XQuery, $selector = null, $compare = null)
    {
        if ($compare && !method_exists($this, $compare)) {
            return false;
        }
        $stack = array();
        if (!$this->elements) {
            $this->debug('Stack empty, skipping...');
        }
        //		var_dump($this->elements[0]->nodeType);
        // element, document
        foreach ($this->stack(array(1, 9, 13)) as $k => $stackNode) {
            $detachAfter = false;
            // to work on detached nodes we need temporary place them somewhere
            // thats because context xpath queries sucks ;]
            $testNode = $stackNode;
            while ($testNode) {
                if (!$testNode->parentNode && !$this->isRoot($testNode)) {
                    $this->root->appendChild($testNode);
                    $detachAfter = $testNode;
                    break;
                }
                $testNode = isset($testNode->parentNode) ? $testNode->parentNode : null;
            }
            // XXX tmp ?
            $xpath = $this->documentWrapper->isXHTML ? $this->getNodeXpath($stackNode, 'html') : $this->getNodeXpath($stackNode);
            // FIXME pseudoclasses-only query, support XML
            $query = $XQuery == '//' && $xpath == '/html[1]' ? '//*' : $xpath.$XQuery;
            $this->debug("XPATH: {$query}");
            // run query, get elements
            $nodes = $this->xpath->query($query);
            $this->debug('QUERY FETCHED');
            if (!$nodes->length) {
                $this->debug('Nothing found');
            }
            $debug = array();
            foreach ($nodes as $node) {
                $matched = false;
                if ($compare) {
                    phpQuery::$debug ?
                                    $this->debug('Found: '.$this->whois($node).", comparing with {$compare}()") : null;
                    $phpQueryDebug = phpQuery::$debug;
                    phpQuery::$debug = false;
                    // TODO ??? use phpQuery::callbackRun()
                    if (call_user_func_array(array($this, $compare), array($selector, $node))) {
                        $matched = true;
                    }
                    phpQuery::$debug = $phpQueryDebug;
                } else {
                    $matched = true;
                }
                if ($matched) {
                    if (phpQuery::$debug) {
                        $debug[] = $this->whois($node);
                    }
                    $stack[] = $node;
                }
            }
            if (phpQuery::$debug) {
                $this->debug('Matched '.count($debug).': '.implode(', ', $debug));
            }
            if ($detachAfter) {
                $this->root->removeChild($detachAfter);
            }
        }
        $this->elements = $stack;
    }

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function find($selectors, $context = null, $noHistory = false)
    {
        if (!$noHistory) {
            // backup last stack /for end()/
            $this->elementsBackup = $this->elements;
        }
        // allow to define context
        // TODO combine code below with phpQuery::pq() context guessing code
        //   as generic function
        if ($context) {
            if (!is_array($context) && $context instanceof DOMELEMENT) {
                $this->elements = array($context);
            } elseif (is_array($context)) {
                $this->elements = array();
                foreach ($context as $c) {
                    if ($c instanceof DOMELEMENT) {
                        $this->elements[] = $c;
                    }
                }
            } elseif ($context instanceof self) {
                $this->elements = $context->elements;
            }
        }
        $queries = $this->parseSelector($selectors);
        $this->debug(array('FIND', $selectors, $queries));
        $XQuery = '';
        // remember stack state because of multi-queries
        $oldStack = $this->elements;
        // here we will be keeping found elements
        $stack = array();
        foreach ($queries as $selector) {
            $this->elements = $oldStack;
            $delimiterBefore = false;
            foreach ($selector as $s) {
                // TAG
                $isTag = extension_loaded('mbstring') && phpQuery::$mbstringSupport ? mb_ereg_match('^[\w|\||-]+$', $s) || $s == '*' : preg_match('@^[\w|\||-]+$@', $s) || $s == '*';
                if ($isTag) {
                    if ($this->isXML()) {
                        // namespace support
                        if (mb_strpos($s, '|') !== false) {
                            $ns = $tag = null;
                            list($ns, $tag) = explode('|', $s);
                            $XQuery .= "$ns:$tag";
                        } elseif ($s == '*') {
                            $XQuery .= '*';
                        } else {
                            $XQuery .= "*[local-name()='$s']";
                        }
                    } else {
                        $XQuery .= $s;
                    }
                    // ID
                } elseif ($s[0] == '#') {
                    if ($delimiterBefore) {
                        $XQuery .= '*';
                    }
                    $XQuery .= "[@id='".substr($s, 1)."']";
                    // ATTRIBUTES
                } elseif ($s[0] == '[') {
                    if ($delimiterBefore) {
                        $XQuery .= '*';
                    }
                    // strip side brackets
                    $attr = trim($s, '][');
                    $execute = false;
                    // attr with specifed value
                    if (mb_strpos($s, '=')) {
                        $value = null;
                        list($attr, $value) = explode('=', $attr);
                        $value = trim($value, "'\"");
                        if ($this->isRegexp($attr)) {
                            // cut regexp character
                            $attr = substr($attr, 0, -1);
                            $execute = true;
                            $XQuery .= "[@{$attr}]";
                        } else {
                            $XQuery .= "[@{$attr}='{$value}']";
                        }
                        // attr without specified value
                    } else {
                        $XQuery .= "[@{$attr}]";
                    }
                    if ($execute) {
                        $this->runQuery($XQuery, $s, 'is');
                        $XQuery = '';
                        if (!$this->length()) {
                            break;
                        }
                    }
                    // CLASSES
                } elseif ($s[0] == '.') {
                    // TODO use return $this->find("./self::*[contains(concat(\" \",@class,\" \"), \" $class \")]");
                    // thx wizDom ;)
                    if ($delimiterBefore) {
                        $XQuery .= '*';
                    }
                    $XQuery .= '[@class]';
                    $this->runQuery($XQuery, $s, 'matchClasses');
                    $XQuery = '';
                    if (!$this->length()) {
                        break;
                    }
                    // ~ General Sibling Selector
                } elseif ($s[0] == '~') {
                    $this->runQuery($XQuery);
                    $XQuery = '';
                    $this->elements = $this
                                    ->siblings(
                                            substr($s, 1)
                                    )->elements;
                    if (!$this->length()) {
                        break;
                    }
                    // + Adjacent sibling selectors
                } elseif ($s[0] == '+') {
                    // TODO /following-sibling::
                    $this->runQuery($XQuery);
                    $XQuery = '';
                    $subSelector = substr($s, 1);
                    $subElements = $this->elements;
                    $this->elements = array();
                    foreach ($subElements as $node) {
                        // search first DOMElement sibling
                        $test = $node->nextSibling;
                        while ($test && !($test instanceof DOMELEMENT)) {
                            $test = $test->nextSibling;
                        }
                        if ($test && $this->is($subSelector, $test)) {
                            $this->elements[] = $test;
                        }
                    }
                    if (!$this->length()) {
                        break;
                    }
                    // PSEUDO CLASSES
                } elseif ($s[0] == ':') {
                    // TODO optimization for :first :last
                    if ($XQuery) {
                        $this->runQuery($XQuery);
                        $XQuery = '';
                    }
                    if (!$this->length()) {
                        break;
                    }
                    $this->pseudoClasses($s);
                    if (!$this->length()) {
                        break;
                    }
                    // DIRECT DESCENDANDS
                } elseif ($s == '>') {
                    $XQuery .= '/';
                    $delimiterBefore = 2;
                    // ALL DESCENDANDS
                } elseif ($s == ' ') {
                    $XQuery .= '//';
                    $delimiterBefore = 2;
                    // ERRORS
                } else {
                    phpQuery::debug("Unrecognized token '$s'");
                }
                $delimiterBefore = $delimiterBefore === 2;
            }
            // run query if any
            if ($XQuery && $XQuery != '//') {
                $this->runQuery($XQuery);
                $XQuery = '';
            }
            foreach ($this->elements as $node) {
                if (!$this->elementsContainsNode($node, $stack)) {
                    $stack[] = $node;
                }
            }
        }
        $this->elements = $stack;

        return $this->newInstance();
    }

    /**
     * @todo create API for classes with pseudoselectors
     */
    protected function pseudoClasses($class)
    {
        // TODO clean args parsing ?
        $class = ltrim($class, ':');
        $haveArgs = mb_strpos($class, '(');
        if ($haveArgs !== false) {
            $args = substr($class, $haveArgs + 1, -1);
            $class = substr($class, 0, $haveArgs);
        }
        switch ($class) {
            case 'even':
            case 'odd':
                $stack = array();
                foreach ($this->elements as $i => $node) {
                    if ($class == 'even' && ($i % 2) == 0) {
                        $stack[] = $node;
                    } elseif ($class == 'odd' && $i % 2) {
                        $stack[] = $node;
                    }
                }
                $this->elements = $stack;
                break;
            case 'eq':
                $k = intval($args);
                $this->elements = isset($this->elements[$k]) ? array($this->elements[$k]) : array();
                break;
            case 'gt':
                $this->elements = array_slice($this->elements, $args + 1);
                break;
            case 'lt':
                $this->elements = array_slice($this->elements, 0, $args + 1);
                break;
            case 'first':
                if (isset($this->elements[0])) {
                    $this->elements = array($this->elements[0]);
                }
                break;
            case 'last':
                if ($this->elements) {
                    $this->elements = array($this->elements[count($this->elements) - 1]);
                }
                break;
            /* case 'parent':
              $stack = array();
              foreach($this->elements as $node) {
              if ( $node->childNodes->length )
              $stack[] = $node;
              }
              $this->elements = $stack;
              break; */
            case 'contains':
                $text = trim($args, "\"'");
                $stack = array();
                foreach ($this->elements as $node) {
                    if (mb_stripos($node->textContent, $text) === false) {
                        continue;
                    }
                    $stack[] = $node;
                }
                $this->elements = $stack;
                break;
            case 'not':
                $selector = self::unQuote($args);
                $this->elements = $this->not($selector)->stack();
                break;
            case 'slice':
                // TODO jQuery difference ?
                $args = explode(',', str_replace(', ', ',', trim($args, "\"'"))
                );
                $start = $args[0];
                $end = isset($args[1]) ? $args[1] : null;
                if ($end > 0) {
                    $end = $end - $start;
                }
                $this->elements = array_slice($this->elements, $start, $end);
                break;
            case 'has':
                $selector = trim($args, "\"'");
                $stack = array();
                foreach ($this->stack(1) as $el) {
                    if ($this->find($selector, $el, true)->length) {
                        $stack[] = $el;
                    }
                }
                $this->elements = $stack;
                break;
            case 'submit':
            case 'reset':
                $this->elements = phpQuery::merge(
                                $this->map(array($this, 'is'), "input[type=$class]", new CallbackParam()
                                ), $this->map(array($this, 'is'), "button[type=$class]", new CallbackParam()
                                )
                );
                break;
            //				$stack = array();
            //				foreach($this->elements as $node)
            //					if ($node->is('input[type=submit]') || $node->is('button[type=submit]'))
            //						$stack[] = $el;
            //				$this->elements = $stack;
            case 'input':
                $this->elements = $this->map(
                                array($this, 'is'), 'input', new CallbackParam()
                        )->elements;
                break;
            case 'password':
            case 'checkbox':
            case 'radio':
            case 'hidden':
            case 'image':
            case 'file':
                $this->elements = $this->map(
                                array($this, 'is'), "input[type=$class]", new CallbackParam()
                        )->elements;
                break;
            case 'parent':
                $this->elements = $this->map(
                                create_function('$node', '
					return $node instanceof DOMELEMENT && $node->childNodes->length
						? $node : null;')
                        )->elements;
                break;
            case 'empty':
                $this->elements = $this->map(
                                create_function('$node', '
					return $node instanceof DOMELEMENT && $node->childNodes->length
						? null : $node;')
                        )->elements;
                break;
            case 'disabled':
            case 'selected':
            case 'checked':
                $this->elements = $this->map(
                                array($this, 'is'), "[$class]", new CallbackParam()
                        )->elements;
                break;
            case 'enabled':
                $this->elements = $this->map(
                                create_function('$node', '
					return pq($node)->not(":disabled") ? $node : null;')
                        )->elements;
                break;
            case 'header':
                $this->elements = $this->map(
                                create_function('$node', '$isHeader = isset($node->tagName) && in_array($node->tagName, array(
					"h1", "h2", "h3", "h4", "h5", "h6", "h7"
				));
				return $isHeader
					? $node
					: null;')
                        )->elements;
                //				$this->elements = $this->map(
                //					create_function('$node', '$node = pq($node);
                //						return $node->is("h1")
                //							|| $node->is("h2")
                //							|| $node->is("h3")
                //							|| $node->is("h4")
                //							|| $node->is("h5")
                //							|| $node->is("h6")
                //							|| $node->is("h7")
                //							? $node
                //							: null;')
                //				)->elements;
                break;
            case 'only-child':
                $this->elements = $this->map(
                                create_function('$node', 'return pq($node)->siblings()->size() == 0 ? $node : null;')
                        )->elements;
                break;
            case 'first-child':
                $this->elements = $this->map(
                                create_function('$node', 'return pq($node)->prevAll()->size() == 0 ? $node : null;')
                        )->elements;
                break;
            case 'last-child':
                $this->elements = $this->map(
                                create_function('$node', 'return pq($node)->nextAll()->size() == 0 ? $node : null;')
                        )->elements;
                break;
            case 'nth-child':
                $param = trim($args, "\"'");
                if (!$param) {
                    break;
                }
                // nth-child(n+b) to nth-child(1n+b)
                if ($param[0] == 'n') {
                    $param = '1'.$param;
                }
                // :nth-child(index/even/odd/equation)
                if ($param == 'even' || $param == 'odd') {
                    $mapped = $this->map(
                            create_function('$node, $param', '$index = pq($node)->prevAll()->size()+1;
					if ($param == "even" && ($index%2) == 0)
						return $node;
					else if ($param == "odd" && $index%2 == 1)
						return $node;
					else
						return null;'), new CallbackParam(), $param
                    );
                } elseif (mb_strlen($param) > 1 && $param[1] == 'n') {
                    // an+b
                    $mapped = $this->map(
                            create_function('$node, $param', '$prevs = pq($node)->prevAll()->size();
					$index = 1+$prevs;
					$b = mb_strlen($param) > 3
						? $param{3}
						: 0;
					$a = $param{0};
					if ($b && $param{2} == "-")
						$b = -$b;
					if ($a > 0) {
						return ($index-$b)%$a == 0
							? $node
							: null;
						phpQuery::debug($a."*".floor($index/$a)."+$b-1 == ".($a*floor($index/$a)+$b-1)." ?= $prevs");
						return $a*floor($index/$a)+$b-1 == $prevs
								? $node
								: null;
					} else if ($a == 0)
						return $index == $b
								? $node
								: null;
					else
						// negative value
						return $index <= $b
								? $node
								: null;
//							if (! $b)
//								return $index%$a == 0
//									? $node
//									: null;
//							else
//								return ($index-$b)%$a == 0
//									? $node
//									: null;
					'), new CallbackParam(), $param
                    );
                } else {
                    // index
                    $mapped = $this->map(
                            create_function('$node, $index', '$prevs = pq($node)->prevAll()->size();
					if ($prevs && $prevs == $index-1)
						return $node;
					else if (! $prevs && $index == 1)
						return $node;
					else
						return null;'), new CallbackParam(), $param
                    );
                }
                $this->elements = $mapped->elements;
                break;
            default:
                $this->debug("Unknown pseudoclass '{$class}', skipping...");
        }
    }

    /**
     */
    protected function __pseudoClassParam($paramsString)
    {
        // TODO;
    }

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function is($selector, $nodes = null)
    {
        phpQuery::debug(array('Is:', $selector));
        if (!$selector) {
            return false;
        }
        $oldStack = $this->elements;
        $returnArray = false;
        if ($nodes && is_array($nodes)) {
            $this->elements = $nodes;
        } elseif ($nodes) {
            $this->elements = array($nodes);
        }
        $this->filter($selector, true);
        $stack = $this->elements;
        $this->elements = $oldStack;
        if ($nodes) {
            return $stack ? $stack : null;
        }

        return (bool) count($stack);
    }

    /**
     * Enter description here...
     * jQuery difference.
     *
     * Callback:
     * - $index int
     * - $node DOMNode
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     *
     * @link http://docs.jquery.com/Traversing/filter
     */
    public function filterCallback($callback, $_skipHistory = false)
    {
        if (!$_skipHistory) {
            $this->elementsBackup = $this->elements;
            $this->debug('Filtering by callback');
        }
        $newStack = array();
        foreach ($this->elements as $index => $node) {
            $result = phpQuery::callbackRun($callback, array($index, $node));
            if (is_null($result) || (!is_null($result) && $result)) {
                $newStack[] = $node;
            }
        }
        $this->elements = $newStack;

        return $_skipHistory ? $this : $this->newInstance();
    }

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     *
     * @link http://docs.jquery.com/Traversing/filter
     */
    public function filter($selectors, $_skipHistory = false)
    {
        if ($selectors instanceof Callback or $selectors instanceof Closure) {
            return $this->filterCallback($selectors, $_skipHistory);
        }
        if (!$_skipHistory) {
            $this->elementsBackup = $this->elements;
        }
        $notSimpleSelector = array(' ', '>', '~', '+', '/');
        if (!is_array($selectors)) {
            $selectors = $this->parseSelector($selectors);
        }
        if (!$_skipHistory) {
            $this->debug(array('Filtering:', $selectors));
        }
        $finalStack = array();
        foreach ($selectors as $selector) {
            $stack = array();
            if (!$selector) {
                break;
            }
            // avoid first space or /
            if (in_array($selector[0], $notSimpleSelector)) {
                $selector = array_slice($selector, 1);
            }
            // PER NODE selector chunks
            foreach ($this->stack() as $node) {
                $break = false;
                foreach ($selector as $s) {
                    if (!($node instanceof DOMELEMENT)) {
                        // all besides DOMElement
                        if ($s[0] == '[') {
                            $attr = trim($s, '[]');
                            if (mb_strpos($attr, '=')) {
                                list($attr, $val) = explode('=', $attr);
                                if ($attr == 'nodeType' && $node->nodeType != $val) {
                                    $break = true;
                                }
                            }
                        } else {
                            $break = true;
                        }
                    } else {
                        // DOMElement only
                        // ID
                        if ($s[0] == '#') {
                            if ($node->getAttribute('id') != substr($s, 1)) {
                                $break = true;
                            }
                            // CLASSES
                        } elseif ($s[0] == '.') {
                            if (!$this->matchClasses($s, $node)) {
                                $break = true;
                            }
                            // ATTRS
                        } elseif ($s[0] == '[') {
                            // strip side brackets
                            $attr = trim($s, '[]');
                            if (mb_strpos($attr, '=')) {
                                list($attr, $val) = explode('=', $attr);
                                $val = self::unQuote($val);
                                if ($attr == 'nodeType') {
                                    if ($val != $node->nodeType) {
                                        $break = true;
                                    }
                                } elseif ($this->isRegexp($attr)) {
                                    $val = extension_loaded('mbstring') && phpQuery::$mbstringSupport ? quotemeta(trim($val, '"\'')) : preg_quote(trim($val, '"\''), '@');
                                    // switch last character
                                    switch (substr($attr, -1)) {
                                        // quotemeta used insted of preg_quote
                                        // http://code.google.com/p/phpquery/issues/detail?id=76
                                        case '^':
                                            $pattern = '^'.$val;
                                            break;
                                        case '*':
                                            $pattern = '.*'.$val.'.*';
                                            break;
                                        case '$':
                                            $pattern = '.*'.$val.'$';
                                            break;
                                    }
                                    // cut last character
                                    $attr = substr($attr, 0, -1);
                                    $isMatch = extension_loaded('mbstring') && phpQuery::$mbstringSupport ? mb_ereg_match($pattern, $node->getAttribute($attr)) : preg_match("@{$pattern}@", $node->getAttribute($attr));
                                    if (!$isMatch) {
                                        $break = true;
                                    }
                                } elseif ($node->getAttribute($attr) != $val) {
                                    $break = true;
                                }
                            } elseif (!$node->hasAttribute($attr)) {
                                $break = true;
                            }
                            // PSEUDO CLASSES
                        } elseif ($s[0] == ':') {
                            // skip
                            // TAG
                        } elseif (trim($s)) {
                            if ($s != '*') {
                                // TODO namespaces
                                if (isset($node->tagName)) {
                                    if ($node->tagName != $s) {
                                        $break = true;
                                    }
                                } elseif ($s == 'html' && !$this->isRoot($node)) {
                                    $break = true;
                                }
                            }
                            // AVOID NON-SIMPLE SELECTORS
                        } elseif (in_array($s, $notSimpleSelector)) {
                            $break = true;
                            $this->debug(array('Skipping non simple selector', $selector));
                        }
                    }
                    if ($break) {
                        break;
                    }
                }
                // if element passed all chunks of selector - add it to new stack
                if (!$break) {
                    $stack[] = $node;
                }
            }
            $tmpStack = $this->elements;
            $this->elements = $stack;
            // PER ALL NODES selector chunks
            foreach ($selector as $s) {
                // PSEUDO CLASSES
                if ($s[0] == ':') {
                    $this->pseudoClasses($s);
                }
            }
            foreach ($this->elements as $node) {
                // XXX it should be merged without duplicates
            // but jQuery doesnt do that
                $finalStack[] = $node;
            }
            $this->elements = $tmpStack;
        }
        $this->elements = $finalStack;
        if ($_skipHistory) {
            return $this;
        } else {
            $this->debug('Stack length after filter(): '.count($finalStack));

            return $this->newInstance();
        }
    }

    /**
     * @param $value
     *
     * @return unknown_type
     * @TODO implement in all methods using passed parameters
     */
    protected static function unQuote($value)
    {
        return $value[0] == '\'' || $value[0] == '"' ? substr($value, 1, -1) : $value;
    }

    /**
     * Enter description here...
     *
     * @link http://docs.jquery.com/Ajax/load
     *
     * @return phpQuery|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     *
     * @todo Support $selector
     */
    public function load($url, $data = null, $callback = null)
    {
        if ($data && !is_array($data)) {
            $callback = $data;
            $data = null;
        }
        if (mb_strpos($url, ' ') !== false) {
            $matches = null;
            if (extension_loaded('mbstring') && phpQuery::$mbstringSupport) {
                mb_ereg('^([^ ]+) (.*)$', $url, $matches);
            } else {
                preg_match('^([^ ]+) (.*)$', $url, $matches);
            }
            $url = $matches[1];
            $selector = $matches[2];
            // FIXME this sucks, pass as callback param
            $this->_loadSelector = $selector;
        }
        $ajax = array(
            'url' => $url,
            'type' => $data ? 'POST' : 'GET',
            'data' => $data,
            'complete' => $callback,
            'success' => array($this, '__loadSuccess'),
        );
        phpQuery::ajax($ajax);

        return $this;
    }

    /**
     * @param $html
     *
     * @return unknown_type
     */
    public function __loadSuccess($html)
    {
        if ($this->_loadSelector) {
            $html = phpQuery::newDocument($html)->find($this->_loadSelector);
            unset($this->_loadSelector);
        }
        foreach ($this->stack(1) as $node) {
            phpQuery::pq($node, $this->getDocumentID())
                    ->markup($html);
        }
    }

    /**
     * Enter description here...
     *
     * @return phpQuery|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     *
     * @todo
     */
    public function css()
    {
        // TODO
        return $this;
    }

    /**
     * @todo
     */
    public function show()
    {
        // TODO
        return $this;
    }

    /**
     * @todo
     */
    public function hide()
    {
        // TODO
        return $this;
    }

    /**
     * Trigger a type of event on every matched element.
     *
     * @param unknown_type $type
     * @param unknown_type $data
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     * @TODO support more than event in $type (space-separated)
     */
    public function trigger($type, $data = array())
    {
        foreach ($this->elements as $node) {
            phpQueryEvents::trigger($this->getDocumentID(), $type, $data, $node);
        }

        return $this;
    }

    /**
     * This particular method triggers all bound event handlers on an element (for a specific event type) WITHOUT executing the browsers default actions.
     *
     * @param unknown_type $type
     * @param unknown_type $data
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     * @TODO
     */
    public function triggerHandler($type, $data = array())
    {
        // TODO;
    }

    /**
     * Binds a handler to one or more events (like click) for each matched element.
     * Can also bind custom events.
     *
     * @param unknown_type $type
     * @param unknown_type $data     Optional
     * @param unknown_type $callback
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     * @TODO support '!' (exclusive) events
     * @TODO support more than event in $type (space-separated)
     */
    public function bind($type, $data, $callback = null)
    {
        // TODO check if $data is callable, not using is_callable
        if (!isset($callback)) {
            $callback = $data;
            $data = null;
        }
        foreach ($this->elements as $node) {
            phpQueryEvents::add($this->getDocumentID(), $node, $type, $data, $callback);
        }

        return $this;
    }

    /**
     * Enter description here...
     *
     * @param unknown_type $type
     * @param unknown_type $callback
     *
     * @return unknown
     * @TODO namespace events
     * @TODO support more than event in $type (space-separated)
     */
    public function unbind($type = null, $callback = null)
    {
        foreach ($this->elements as $node) {
            phpQueryEvents::remove($this->getDocumentID(), $node, $type, $callback);
        }

        return $this;
    }

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function change($callback = null)
    {
        if ($callback) {
            return $this->bind('change', $callback);
        }

        return $this->trigger('change');
    }

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function submit($callback = null)
    {
        if ($callback) {
            return $this->bind('submit', $callback);
        }

        return $this->trigger('submit');
    }

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function click($callback = null)
    {
        if ($callback) {
            return $this->bind('click', $callback);
        }

        return $this->trigger('click');
    }

    /**
     * Enter description here...
     *
     * @param string|phpQuery
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function wrapAllOld($wrapper)
    {
        $wrapper = pq($wrapper)->_clone();
        if (!$wrapper->length() || !$this->length()) {
            return $this;
        }
        $wrapper->insertBefore($this->elements[0]);
        $deepest = $wrapper->elements[0];
        while ($deepest->firstChild && $deepest->firstChild instanceof DOMELEMENT) {
            $deepest = $deepest->firstChild;
        }
        pq($deepest)->append($this);

        return $this;
    }

    /**
     * Enter description here...
     *
     * TODO testme...
     *
     * @param string|phpQuery
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function wrapAll($wrapper)
    {
        if (!$this->length()) {
            return $this;
        }

        return phpQuery::pq($wrapper, $this->getDocumentID())
                        ->clone()
                        ->insertBefore($this->get(0))
                        ->map(array($this, '___wrapAllCallback'))
                        ->append($this);
    }

    /**
     * @param $node
     *
     * @return unknown_type
     */
    public function ___wrapAllCallback($node)
    {
        $deepest = $node;
        while ($deepest->firstChild && $deepest->firstChild instanceof DOMELEMENT) {
            $deepest = $deepest->firstChild;
        }

        return $deepest;
    }

    /**
     * Enter description here...
     * NON JQUERY METHOD.
     *
     * @param string|phpQuery
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function wrapAllPHP($codeBefore, $codeAfter)
    {
        return $this
                        ->slice(0, 1)
                        ->beforePHP($codeBefore)
                        ->end()
                        ->slice(-1)
                        ->afterPHP($codeAfter)
                        ->end();
    }

    /**
     * Enter description here...
     *
     * @param string|phpQuery
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function wrap($wrapper)
    {
        foreach ($this->stack() as $node) {
            phpQuery::pq($node, $this->getDocumentID())->wrapAll($wrapper);
        }

        return $this;
    }

    /**
     * Enter description here...
     *
     * @param string|phpQuery
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function wrapPHP($codeBefore, $codeAfter)
    {
        foreach ($this->stack() as $node) {
            phpQuery::pq($node, $this->getDocumentID())->wrapAllPHP($codeBefore, $codeAfter);
        }

        return $this;
    }

    /**
     * Enter description here...
     *
     * @param string|phpQuery
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function wrapInner($wrapper)
    {
        foreach ($this->stack() as $node) {
            phpQuery::pq($node, $this->getDocumentID())->contents()->wrapAll($wrapper);
        }

        return $this;
    }

    /**
     * Enter description here...
     *
     * @param string|phpQuery
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function wrapInnerPHP($codeBefore, $codeAfter)
    {
        foreach ($this->stack(1) as $node) {
            phpQuery::pq($node, $this->getDocumentID())->contents()
                    ->wrapAllPHP($codeBefore, $codeAfter);
        }

        return $this;
    }

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     * @testme Support for text nodes
     */
    public function contents()
    {
        $stack = array();
        foreach ($this->stack(1) as $el) {
            // FIXME (fixed) http://code.google.com/p/phpquery/issues/detail?id=56
            //			if (! isset($el->childNodes))
            //				continue;
            foreach ($el->childNodes as $node) {
                $stack[] = $node;
            }
        }

        return $this->newInstance($stack);
    }

    /**
     * Enter description here...
     *
     * jQuery difference.
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function contentsUnwrap()
    {
        foreach ($this->stack(1) as $node) {
            if (!$node->parentNode) {
                continue;
            }
            $childNodes = array();
            // any modification in DOM tree breaks childNodes iteration, so cache them first
            foreach ($node->childNodes as $chNode) {
                $childNodes[] = $chNode;
            }
            foreach ($childNodes as $chNode) {
                //				$node->parentNode->appendChild($chNode);
                $node->parentNode->insertBefore($chNode, $node);
            }
            $node->parentNode->removeChild($node);
        }

        return $this;
    }

    /**
     * Enter description here...
     *
     * jQuery difference.
     */
    public function switchWith($markup)
    {
        $markup = pq($markup, $this->getDocumentID());
        $content = null;
        foreach ($this->stack(1) as $node) {
            pq($node)
                    ->contents()->toReference($content)->end()
                    ->replaceWith($markup->clone()->append($content));
        }

        return $this;
    }

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function eq($num)
    {
        $oldStack = $this->elements;
        $this->elementsBackup = $this->elements;
        $this->elements = array();
        if (isset($oldStack[$num])) {
            $this->elements[] = $oldStack[$num];
        }

        return $this->newInstance();
    }

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function size()
    {
        return count($this->elements);
    }

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     *
     * @deprecated Use length as attribute
     */
    public function length()
    {
        return $this->size();
    }

    public function count()
    {
        return $this->size();
    }

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     *
     * @todo $level
     */
    public function end($level = 1)
    {
        //		$this->elements = array_pop( $this->history );
        //		return $this;
        //		$this->previous->DOM = $this->DOM;
        //		$this->previous->XPath = $this->XPath;
        return $this->previous ? $this->previous : $this;
    }

    /**
     * Enter description here...
     * Normal use ->clone() .
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function _clone()
    {
        $newStack = array();
        //pr(array('copy... ', $this->whois()));
        //$this->dumpHistory('copy');
        $this->elementsBackup = $this->elements;
        foreach ($this->elements as $node) {
            $newStack[] = $node->cloneNode(true);
        }
        $this->elements = $newStack;

        return $this->newInstance();
    }

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function replaceWithPHP($code)
    {
        return $this->replaceWith(phpQuery::php($code));
    }

    /**
     * Enter description here...
     *
     * @param string|phpQuery $content
     *
     * @link http://docs.jquery.com/Manipulation/replaceWith#content
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function replaceWith($content)
    {
        return $this->after($content)->remove();
    }

    /**
     * Enter description here...
     *
     * @param string $selector
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     *
     * @todo this works ?
     */
    public function replaceAll($selector)
    {
        foreach (phpQuery::pq($selector, $this->getDocumentID()) as $node) {
            phpQuery::pq($node, $this->getDocumentID())
                    ->after($this->_clone())
                    ->remove();
        }

        return $this;
    }

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function remove($selector = null)
    {
        $loop = $selector ? $this->filter($selector)->elements : $this->elements;
        foreach ($loop as $node) {
            if (!$node->parentNode) {
                continue;
            }
            if (isset($node->tagName)) {
                $this->debug("Removing '{$node->tagName}'");
            }
            $node->parentNode->removeChild($node);
            // Mutation event
            $event = new DOMEvent(array(
                        'target' => $node,
                        'type' => 'DOMNodeRemoved',
                    ));
            phpQueryEvents::trigger($this->getDocumentID(), $event->type, array($event), $node
            );
        }

        return $this;
    }

    protected function markupEvents($newMarkup, $oldMarkup, $node)
    {
        if ($node->tagName == 'textarea' && $newMarkup != $oldMarkup) {
            $event = new DOMEvent(array(
                        'target' => $node,
                        'type' => 'change',
                    ));
            phpQueryEvents::trigger($this->getDocumentID(), $event->type, array($event), $node
            );
        }
    }

    /**
     * jQuey difference.
     *
     * @param $markup
     *
     * @return unknown_type
     * @TODO trigger change event for textarea
     */
    public function markup($markup = null, $callback1 = null, $callback2 = null, $callback3 = null)
    {
        $args = func_get_args();
        if ($this->documentWrapper->isXML) {
            return call_user_func_array(array($this, 'xml'), $args);
        } else {
            return call_user_func_array(array($this, 'html'), $args);
        }
    }

    /**
     * jQuey difference.
     *
     * @param $markup
     *
     * @return unknown_type
     */
    public function markupOuter($callback1 = null, $callback2 = null, $callback3 = null)
    {
        $args = func_get_args();
        if ($this->documentWrapper->isXML) {
            return call_user_func_array(array($this, 'xmlOuter'), $args);
        } else {
            return call_user_func_array(array($this, 'htmlOuter'), $args);
        }
    }

    /**
     * Enter description here...
     *
     * @param unknown_type $html
     *
     * @return string|phpQuery|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     * @TODO force html result
     */
    public function html($html = null, $callback1 = null, $callback2 = null, $callback3 = null)
    {
        if (isset($html)) {
            // INSERT
            $nodes = $this->documentWrapper->import($html);
            $this->empty();
            foreach ($this->stack(1) as $alreadyAdded => $node) {
                // for now, limit events for textarea
                if (($this->isXHTML() || $this->isHTML()) && $node->tagName == 'textarea') {
                    $oldHtml = pq($node, $this->getDocumentID())->markup();
                }
                foreach ($nodes as $newNode) {
                    $node->appendChild($alreadyAdded ? $newNode->cloneNode(true) : $newNode
                    );
                }
                // for now, limit events for textarea
                if (($this->isXHTML() || $this->isHTML()) && $node->tagName == 'textarea') {
                    $this->markupEvents($html, $oldHtml, $node);
                }
            }

            return $this;
        } else {
            // FETCH
            $return = $this->documentWrapper->markup($this->elements, true);
            $args = func_get_args();
            foreach (array_slice($args, 1) as $callback) {
                $return = phpQuery::callbackRun($callback, array($return));
            }

            return $return;
        }
    }

    /**
     * @TODO force xml result
     */
    public function xml($xml = null, $callback1 = null, $callback2 = null, $callback3 = null)
    {
        $args = func_get_args();

        return call_user_func_array(array($this, 'html'), $args);
    }

    /**
     * Enter description here...
     *
     * @TODO force html result
     *
     * @return string
     */
    public function htmlOuter($callback1 = null, $callback2 = null, $callback3 = null)
    {
        $markup = $this->documentWrapper->markup($this->elements);
        // pass thou callbacks
        $args = func_get_args();
        foreach ($args as $callback) {
            $markup = phpQuery::callbackRun($callback, array($markup));
        }

        return $markup;
    }

    /**
     * @TODO force xml result
     */
    public function xmlOuter($callback1 = null, $callback2 = null, $callback3 = null)
    {
        $args = func_get_args();

        return call_user_func_array(array($this, 'htmlOuter'), $args);
    }

    public function __toString()
    {
        return $this->markupOuter();
    }

    /**
     * Just like html(), but returns markup with VALID (dangerous) PHP tags.
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     *
     * @todo support returning markup with PHP tags when called without param
     */
    public function php($code = null)
    {
        return $this->markupPHP($code);
    }

    /**
     * Enter description here...
     *
     * @param $code
     *
     * @return unknown_type
     */
    public function markupPHP($code = null)
    {
        return isset($code) ? $this->markup(phpQuery::php($code)) : phpQuery::markupToPHP($this->markup());
    }

    /**
     * Enter description here...
     *
     * @param $code
     *
     * @return unknown_type
     */
    public function markupOuterPHP()
    {
        return phpQuery::markupToPHP($this->markupOuter());
    }

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function children($selector = null)
    {
        $stack = array();
        foreach ($this->stack(1) as $node) {
            //			foreach($node->getElementsByTagName('*') as $newNode) {
            foreach ($node->childNodes as $newNode) {
                if ($newNode->nodeType != 1) {
                    continue;
                }
                if ($selector && !$this->is($selector, $newNode)) {
                    continue;
                }
                if ($this->elementsContainsNode($newNode, $stack)) {
                    continue;
                }
                $stack[] = $newNode;
            }
        }
        $this->elementsBackup = $this->elements;
        $this->elements = $stack;

        return $this->newInstance();
    }

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function ancestors($selector = null)
    {
        return $this->children($selector);
    }

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function append($content)
    {
        return $this->insert($content, __FUNCTION__);
    }

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function appendPHP($content)
    {
        return $this->insert("<php><!-- {$content} --></php>", 'append');
    }

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function appendTo($seletor)
    {
        return $this->insert($seletor, __FUNCTION__);
    }

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function prepend($content)
    {
        return $this->insert($content, __FUNCTION__);
    }

    /**
     * Enter description here...
     *
     * @todo accept many arguments, which are joined, arrays maybe also
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function prependPHP($content)
    {
        return $this->insert("<php><!-- {$content} --></php>", 'prepend');
    }

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function prependTo($seletor)
    {
        return $this->insert($seletor, __FUNCTION__);
    }

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function before($content)
    {
        return $this->insert($content, __FUNCTION__);
    }

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function beforePHP($content)
    {
        return $this->insert("<php><!-- {$content} --></php>", 'before');
    }

    /**
     * Enter description here...
     *
     * @param string|phpQuery
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function insertBefore($seletor)
    {
        return $this->insert($seletor, __FUNCTION__);
    }

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function after($content)
    {
        return $this->insert($content, __FUNCTION__);
    }

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function afterPHP($content)
    {
        return $this->insert("<php><!-- {$content} --></php>", 'after');
    }

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function insertAfter($seletor)
    {
        return $this->insert($seletor, __FUNCTION__);
    }

    /**
     * Internal insert method. Don't use it.
     *
     * @param unknown_type $target
     * @param unknown_type $type
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function insert($target, $type)
    {
        $this->debug("Inserting data with '{$type}'");
        $to = false;
        switch ($type) {
            case 'appendTo':
            case 'prependTo':
            case 'insertBefore':
            case 'insertAfter':
                $to = true;
        }
        switch (gettype($target)) {
            case 'string':
                $insertFrom = $insertTo = array();
                if ($to) {
                    // INSERT TO
                    $insertFrom = $this->elements;
                    if (phpQuery::isMarkup($target)) {
                        // $target is new markup, import it
                        $insertTo = $this->documentWrapper->import($target);
                        // insert into selected element
                    } else {
                        // $tagret is a selector
                        $thisStack = $this->elements;
                        $this->toRoot();
                        $insertTo = $this->find($target)->elements;
                        $this->elements = $thisStack;
                    }
                } else {
                    // INSERT FROM
                    $insertTo = $this->elements;
                    $insertFrom = $this->documentWrapper->import($target);
                }
                break;
            case 'object':
                $insertFrom = $insertTo = array();
                // phpQuery
                if ($target instanceof self) {
                    if ($to) {
                        $insertTo = $target->elements;
                        if ($this->documentFragment && $this->stackIsRoot()) {
                            // get all body children
                        //							$loop = $this->find('body > *')->elements;
                        // TODO test it, test it hard...
                        //							$loop = $this->newInstance($this->root)->find('> *')->elements;
                            $loop = $this->root->childNodes;
                        } else {
                            $loop = $this->elements;
                        }
                        // import nodes if needed
                        $insertFrom = $this->getDocumentID() == $target->getDocumentID() ? $loop : $target->documentWrapper->import($loop);
                    } else {
                        $insertTo = $this->elements;
                        if ($target->documentFragment && $target->stackIsRoot()) {
                            // get all body children
                        //							$loop = $target->find('body > *')->elements;
                            $loop = $target->root->childNodes;
                        } else {
                            $loop = $target->elements;
                        }
                        // import nodes if needed
                        $insertFrom = $this->getDocumentID() == $target->getDocumentID() ? $loop : $this->documentWrapper->import($loop);
                    }
                    // DOMNODE
                } elseif ($target instanceof DOMNODE) {
                    // import node if needed
                    //					if ( $target->ownerDocument != $this->DOM )
                    //						$target = $this->DOM->importNode($target, true);
                    if ($to) {
                        $insertTo = array($target);
                        if ($this->documentFragment && $this->stackIsRoot()) {
                            // get all body children
                            $loop = $this->root->childNodes;
                        }
                        //							$loop = $this->find('body > *')->elements;
                        else {
                            $loop = $this->elements;
                        }
                        foreach ($loop as $fromNode) {
                            // import nodes if needed
                            $insertFrom[] = !$fromNode->ownerDocument->isSameNode($target->ownerDocument) ? $target->ownerDocument->importNode($fromNode, true) : $fromNode;
                        }
                    } else {
                        // import node if needed
                        if (!$target->ownerDocument->isSameNode($this->document)) {
                            $target = $this->document->importNode($target, true);
                        }
                        $insertTo = $this->elements;
                        $insertFrom[] = $target;
                    }
                }
                break;
        }
        phpQuery::debug('From '.count($insertFrom).'; To '.count($insertTo).' nodes');
        foreach ($insertTo as $insertNumber => $toNode) {
            // we need static relative elements in some cases
            switch ($type) {
                case 'prependTo':
                case 'prepend':
                    $firstChild = $toNode->firstChild;
                    break;
                case 'insertAfter':
                case 'after':
                    $nextSibling = $toNode->nextSibling;
                    break;
            }
            foreach ($insertFrom as $fromNode) {
                // clone if inserted already before
                $insert = $insertNumber ? $fromNode->cloneNode(true) : $fromNode;
                switch ($type) {
                    case 'appendTo':
                    case 'append':
                        //						$toNode->insertBefore(
                        //							$fromNode,
                        //							$toNode->lastChild->nextSibling
                        //						);
                        $toNode->appendChild($insert);
                        $eventTarget = $insert;
                        break;
                    case 'prependTo':
                    case 'prepend':
                        $toNode->insertBefore(
                                $insert, $firstChild
                        );
                        break;
                    case 'insertBefore':
                    case 'before':
                        if (!$toNode->parentNode) {
                            throw new Exception("No parentNode, can't do {$type}()");
                        } else {
                            $toNode->parentNode->insertBefore(
                                    $insert, $toNode
                            );
                        }
                        break;
                    case 'insertAfter':
                    case 'after':
                        if (!$toNode->parentNode) {
                            throw new Exception("No parentNode, can't do {$type}()");
                        } else {
                            $toNode->parentNode->insertBefore(
                                    $insert, $nextSibling
                            );
                        }
                        break;
                }
                // Mutation event
                $event = new DOMEvent(array(
                            'target' => $insert,
                            'type' => 'DOMNodeInserted',
                        ));
                phpQueryEvents::trigger($this->getDocumentID(), $event->type, array($event), $insert
                );
            }
        }

        return $this;
    }

    /**
     * Enter description here...
     *
     * @return int
     */
    public function index($subject)
    {
        $index = -1;
        $subject = $subject instanceof self ? $subject->elements[0] : $subject;
        foreach ($this->newInstance() as $k => $node) {
            if ($node->isSameNode($subject)) {
                $index = $k;
            }
        }

        return $index;
    }

    /**
     * Enter description here...
     *
     * @param unknown_type $start
     * @param unknown_type $end
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     * @testme
     */
    public function slice($start, $end = null)
    {
        //		$last = count($this->elements)-1;
        //		$end = $end
        //			? min($end, $last)
        //			: $last;
        //		if ($start < 0)
        //			$start = $last+$start;
        //		if ($start > $last)
        //			return array();
        if ($end > 0) {
            $end = $end - $start;
        }

        return $this->newInstance(
                        array_slice($this->elements, $start, $end)
        );
    }

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function reverse()
    {
        $this->elementsBackup = $this->elements;
        $this->elements = array_reverse($this->elements);

        return $this->newInstance();
    }

    /**
     * Return joined text content.
     *
     * @return string
     */
    public function text($text = null, $callback1 = null, $callback2 = null, $callback3 = null)
    {
        if (isset($text)) {
            return $this->html(htmlspecialchars($text));
        }
        $args = func_get_args();
        $args = array_slice($args, 1);
        $return = '';
        foreach ($this->elements as $node) {
            $text = $node->textContent;
            if (count($this->elements) > 1 && $text) {
                $text .= "\n";
            }
            foreach ($args as $callback) {
                $text = phpQuery::callbackRun($callback, array($text));
            }
            $return .= $text;
        }

        return $return;
    }

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function plugin($class, $file = null)
    {
        phpQuery::plugin($class, $file);

        return $this;
    }

    /**
     * Deprecated, use $pq->plugin() instead.
     *
     * @deprecated
     *
     * @param $class
     * @param $file
     *
     * @return unknown_type
     */
    public static function extend($class, $file = null)
    {
        return $this->plugin($class, $file);
    }

    /**
     * @param $method
     * @param $args
     *
     * @return unknown_type
     */
    public function __call($method, $args)
    {
        $aliasMethods = array('clone', 'empty');
        if (isset(phpQuery::$extendMethods[$method])) {
            array_unshift($args, $this);

            return phpQuery::callbackRun(
                            phpQuery::$extendMethods[$method], $args
            );
        } elseif (isset(phpQuery::$pluginsMethods[$method])) {
            array_unshift($args, $this);
            $class = phpQuery::$pluginsMethods[$method];
            $realClass = "phpQueryObjectPlugin_$class";
            $return = call_user_func_array(
                    array($realClass, $method), $args
            );
            // XXX deprecate ?
            return is_null($return) ? $this : $return;
        } elseif (in_array($method, $aliasMethods)) {
            return call_user_func_array(array($this, '_'.$method), $args);
        } else {
            throw new Exception("Method '{$method}' doesnt exist");
        }
    }

    /**
     * Safe rename of next().
     *
     * Use it ONLY when need to call next() on an iterated object (in same time).
     * Normaly there is no need to do such thing ;)
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function _next($selector = null)
    {
        return $this->newInstance(
                        $this->getElementSiblings('nextSibling', $selector, true)
        );
    }

    /**
     * Use prev() and next().
     *
     * @deprecated
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function _prev($selector = null)
    {
        return $this->prev($selector);
    }

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function prev($selector = null)
    {
        return $this->newInstance(
                        $this->getElementSiblings('previousSibling', $selector, true)
        );
    }

    /**
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     *
     * @todo
     */
    public function prevAll($selector = null)
    {
        return $this->newInstance(
                        $this->getElementSiblings('previousSibling', $selector)
        );
    }

    /**
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     *
     * @todo FIXME: returns source elements insted of next siblings
     */
    public function nextAll($selector = null)
    {
        return $this->newInstance(
                        $this->getElementSiblings('nextSibling', $selector)
        );
    }

    /**
     */
    protected function getElementSiblings($direction, $selector = null, $limitToOne = false)
    {
        $stack = array();
        $count = 0;
        foreach ($this->stack() as $node) {
            $test = $node;
            while (isset($test->{$direction}) && $test->{$direction}) {
                $test = $test->{$direction};
                if (!$test instanceof DOMELEMENT) {
                    continue;
                }
                $stack[] = $test;
                if ($limitToOne) {
                    break;
                }
            }
        }
        if ($selector) {
            $stackOld = $this->elements;
            $this->elements = $stack;
            $stack = $this->filter($selector, true)->stack();
            $this->elements = $stackOld;
        }

        return $stack;
    }

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function siblings($selector = null)
    {
        $stack = array();
        $siblings = array_merge(
                $this->getElementSiblings('previousSibling', $selector), $this->getElementSiblings('nextSibling', $selector)
        );
        foreach ($siblings as $node) {
            if (!$this->elementsContainsNode($node, $stack)) {
                $stack[] = $node;
            }
        }

        return $this->newInstance($stack);
    }

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function not($selector = null)
    {
        if (is_string($selector)) {
            phpQuery::debug(array('not', $selector));
        } else {
            phpQuery::debug('not');
        }
        $stack = array();
        if ($selector instanceof self || $selector instanceof DOMNODE) {
            foreach ($this->stack() as $node) {
                if ($selector instanceof self) {
                    $matchFound = false;
                    foreach ($selector->stack() as $notNode) {
                        if ($notNode->isSameNode($node)) {
                            $matchFound = true;
                        }
                    }
                    if (!$matchFound) {
                        $stack[] = $node;
                    }
                } elseif ($selector instanceof DOMNODE) {
                    if (!$selector->isSameNode($node)) {
                        $stack[] = $node;
                    }
                } else {
                    if (!$this->is($selector)) {
                        $stack[] = $node;
                    }
                }
            }
        } else {
            $orgStack = $this->stack();
            $matched = $this->filter($selector, true)->stack();
            //			$matched = array();
            //			// simulate OR in filter() instead of AND 5y
            //			foreach($this->parseSelector($selector) as $s) {
            //				$matched = array_merge($matched,
            //					$this->filter(array($s))->stack()
            //				);
            //			}
            foreach ($orgStack as $node) {
                if (!$this->elementsContainsNode($node, $matched)) {
                    $stack[] = $node;
                }
            }
        }

        return $this->newInstance($stack);
    }

    /**
     * Enter description here...
     *
     * @param string|phpQueryObject
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function add($selector = null)
    {
        if (!$selector) {
            return $this;
        }
        $stack = array();
        $this->elementsBackup = $this->elements;
        $found = phpQuery::pq($selector, $this->getDocumentID());
        $this->merge($found->elements);

        return $this->newInstance();
    }

    /**
     */
    protected function merge()
    {
        foreach (func_get_args() as $nodes) {
            foreach ($nodes as $newNode) {
                if (!$this->elementsContainsNode($newNode)) {
                    $this->elements[] = $newNode;
                }
            }
        }
    }

    /**
     */
    protected function elementsContainsNode($nodeToCheck, $elementsStack = null)
    {
        $loop = !is_null($elementsStack) ? $elementsStack : $this->elements;
        foreach ($loop as $node) {
            if ($node->isSameNode($nodeToCheck)) {
                return true;
            }
        }

        return false;
    }

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function parent($selector = null)
    {
        $stack = array();
        foreach ($this->elements as $node) {
            if ($node->parentNode && !$this->elementsContainsNode($node->parentNode, $stack)) {
                $stack[] = $node->parentNode;
            }
        }
        $this->elementsBackup = $this->elements;
        $this->elements = $stack;
        if ($selector) {
            $this->filter($selector, true);
        }

        return $this->newInstance();
    }

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function parents($selector = null)
    {
        $stack = array();
        if (!$this->elements) {
            $this->debug('parents() - stack empty');
        }
        foreach ($this->elements as $node) {
            $test = $node;
            while ($test->parentNode) {
                $test = $test->parentNode;
                if ($this->isRoot($test)) {
                    break;
                }
                if (!$this->elementsContainsNode($test, $stack)) {
                    $stack[] = $test;
                    continue;
                }
            }
        }
        $this->elementsBackup = $this->elements;
        $this->elements = $stack;
        if ($selector) {
            $this->filter($selector, true);
        }

        return $this->newInstance();
    }

    /**
     * Internal stack iterator.
     */
    public function stack($nodeTypes = null)
    {
        if (!isset($nodeTypes)) {
            return $this->elements;
        }
        if (!is_array($nodeTypes)) {
            $nodeTypes = array($nodeTypes);
        }
        $return = array();
        foreach ($this->elements as $node) {
            if (in_array($node->nodeType, $nodeTypes)) {
                $return[] = $node;
            }
        }

        return $return;
    }

    // TODO phpdoc; $oldAttr is result of hasAttribute, before any changes
    protected function attrEvents($attr, $oldAttr, $oldValue, $node)
    {
        // skip events for XML documents
        if (!$this->isXHTML() && !$this->isHTML()) {
            return;
        }
        $event = null;
        // identify
        $isInputValue = $node->tagName == 'input'
                && (
                in_array($node->getAttribute('type'), array('text', 'password', 'hidden'))
                || !$node->getAttribute('type')
                );
        $isRadio = $node->tagName == 'input'
                && $node->getAttribute('type') == 'radio';
        $isCheckbox = $node->tagName == 'input'
                && $node->getAttribute('type') == 'checkbox';
        $isOption = $node->tagName == 'option';
        if ($isInputValue && $attr == 'value' && $oldValue != $node->getAttribute($attr)) {
            $event = new DOMEvent(array(
                        'target' => $node,
                        'type' => 'change',
                    ));
        } elseif (($isRadio || $isCheckbox) && $attr == 'checked' && (
                // check
                (!$oldAttr && $node->hasAttribute($attr))
                // un-check
                || (!$node->hasAttribute($attr) && $oldAttr)
                )) {
            $event = new DOMEvent(array(
                        'target' => $node,
                        'type' => 'change',
                    ));
        } elseif ($isOption && $node->parentNode && $attr == 'selected' && (
                // select
                (!$oldAttr && $node->hasAttribute($attr))
                // un-select
                || (!$node->hasAttribute($attr) && $oldAttr)
                )) {
            $event = new DOMEvent(array(
                        'target' => $node->parentNode,
                        'type' => 'change',
                    ));
        }
        if ($event) {
            phpQueryEvents::trigger($this->getDocumentID(), $event->type, array($event), $node
            );
        }
    }

    public function attr($attr = null, $value = null)
    {
        foreach ($this->stack(1) as $node) {
            if (!is_null($value)) {
                $loop = $attr == '*' ? $this->getNodeAttrs($node) : array($attr);
                foreach ($loop as $a) {
                    $oldValue = $node->getAttribute($a);
                    $oldAttr = $node->hasAttribute($a);
                    // TODO raises an error when charset other than UTF-8
                    // while document's charset is also not UTF-8
                    @$node->setAttribute($a, $value);
                    $this->attrEvents($a, $oldAttr, $oldValue, $node);
                }
            } elseif ($attr == '*') {
                // jQuery difference
                $return = array();
                foreach ($node->attributes as $n => $v) {
                    $return[$n] = $v->value;
                }

                return $return;
            } else {
                return $node->hasAttribute($attr) ? $node->getAttribute($attr) : null;
            }
        }

        return is_null($value) ? '' : $this;
    }

    /**
     */
    protected function getNodeAttrs($node)
    {
        $return = array();
        foreach ($node->attributes as $n => $o) {
            $return[] = $n;
        }

        return $return;
    }

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     *
     * @todo check CDATA ???
     */
    public function attrPHP($attr, $code)
    {
        if (!is_null($code)) {
            $value = '<'.'?php '.$code.' ?'.'>';
            // TODO tempolary solution
            // http://code.google.com/p/phpquery/issues/detail?id=17
            //			if (function_exists('mb_detect_encoding') && mb_detect_encoding($value) == 'ASCII')
            //				$value	= mb_convert_encoding($value, 'UTF-8', 'HTML-ENTITIES');
        }
        foreach ($this->stack(1) as $node) {
            if (!is_null($code)) {
                //				$attrNode = $this->DOM->createAttribute($attr);
                $node->setAttribute($attr, $value);
                //				$attrNode->value = $value;
                //				$node->appendChild($attrNode);
            } elseif ($attr == '*') {
                // jQuery diff
                $return = array();
                foreach ($node->attributes as $n => $v) {
                    $return[$n] = $v->value;
                }

                return $return;
            } else {
                return $node->getAttribute($attr);
            }
        }

        return $this;
    }

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function removeAttr($attr)
    {
        foreach ($this->stack(1) as $node) {
            $loop = $attr == '*' ? $this->getNodeAttrs($node) : array($attr);
            foreach ($loop as $a) {
                $oldValue = $node->getAttribute($a);
                $node->removeAttribute($a);
                $this->attrEvents($a, $oldValue, null, $node);
            }
        }

        return $this;
    }

    /**
     * Return form element value.
     *
     * @return string Fields value.
     */
    public function val($val = null)
    {
        if (!isset($val)) {
            if ($this->eq(0)->is('select')) {
                $selected = $this->eq(0)->find('option[selected=selected]');
                if ($selected->is('[value]')) {
                    return $selected->attr('value');
                } else {
                    return $selected->text();
                }
            } elseif ($this->eq(0)->is('textarea')) {
                return $this->eq(0)->markup();
            } else {
                return $this->eq(0)->attr('value');
            }
        } else {
            $_val = null;
            foreach ($this->stack(1) as $node) {
                $node = pq($node, $this->getDocumentID());
                if (is_array($val) && in_array($node->attr('type'), array('checkbox', 'radio'))) {
                    $isChecked = in_array($node->attr('value'), $val)
                            || in_array($node->attr('name'), $val);
                    if ($isChecked) {
                        $node->attr('checked', 'checked');
                    } else {
                        $node->removeAttr('checked');
                    }
                } elseif ($node->get(0)->tagName == 'select') {
                    if (!isset($_val)) {
                        $_val = array();
                        if (!is_array($val)) {
                            $_val = array((string) $val);
                        } else {
                            foreach ($val as $v) {
                                $_val[] = $v;
                            }
                        }
                    }
                    foreach ($node['option']->stack(1) as $option) {
                        $option = pq($option, $this->getDocumentID());
                        $selected = false;
                        // XXX: workaround for string comparsion, see issue #96
                        // http://code.google.com/p/phpquery/issues/detail?id=96
                        $selected = is_null($option->attr('value')) ? in_array($option->markup(), $_val) : in_array($option->attr('value'), $_val);
                        //						$optionValue = $option->attr('value');
                        //						$optionText = $option->text();
                        //						$optionTextLenght = mb_strlen($optionText);
                        //						foreach($_val as $v)
                        //							if ($optionValue == $v)
                        //								$selected = true;
                        //							else if ($optionText == $v && $optionTextLenght == mb_strlen($v))
                        //								$selected = true;
                        if ($selected) {
                            $option->attr('selected', 'selected');
                        } else {
                            $option->removeAttr('selected');
                        }
                    }
                } elseif ($node->get(0)->tagName == 'textarea') {
                    $node->markup($val);
                } else {
                    $node->attr('value', $val);
                }
            }
        }

        return $this;
    }

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function andSelf()
    {
        if ($this->previous) {
            $this->elements = array_merge($this->elements, $this->previous->elements);
        }

        return $this;
    }

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function addClass($className)
    {
        if (!$className) {
            return $this;
        }
        foreach ($this->stack(1) as $node) {
            if (!$this->is(".$className", $node)) {
                $node->setAttribute(
                        'class', trim($node->getAttribute('class').' '.$className)
                );
            }
        }

        return $this;
    }

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function addClassPHP($className)
    {
        foreach ($this->stack(1) as $node) {
            $classes = $node->getAttribute('class');
            $newValue = $classes ? $classes.' <'.'?php '.$className.' ?'.'>' : '<'.'?php '.$className.' ?'.'>';
            $node->setAttribute('class', $newValue);
        }

        return $this;
    }

    /**
     * Enter description here...
     *
     * @param string $className
     *
     * @return bool
     */
    public function hasClass($className)
    {
        foreach ($this->stack(1) as $node) {
            if ($this->is(".$className", $node)) {
                return true;
            }
        }

        return false;
    }

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function removeClass($className)
    {
        foreach ($this->stack(1) as $node) {
            $classes = explode(' ', $node->getAttribute('class'));
            if (in_array($className, $classes)) {
                $classes = array_diff($classes, array($className));
                if ($classes) {
                    $node->setAttribute('class', implode(' ', $classes));
                } else {
                    $node->removeAttribute('class');
                }
            }
        }

        return $this;
    }

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function toggleClass($className)
    {
        foreach ($this->stack(1) as $node) {
            if ($this->is($node, '.'.$className)) {
                $this->removeClass($className);
            } else {
                $this->addClass($className);
            }
        }

        return $this;
    }

    /**
     * Proper name without underscore (just ->empty()) also works.
     *
     * Removes all child nodes from the set of matched elements.
     *
     * Example:
     * pq("p")._empty()
     *
     * HTML:
     * <p>Hello, <span>Person</span> <a href="#">and person</a></p>
     *
     * Result:
     * [ <p></p> ]
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function _empty()
    {
        foreach ($this->stack(1) as $node) {
            // thx to 'dave at dgx dot cz'
            $node->nodeValue = '';
        }

        return $this;
    }

    /**
     * Enter description here...
     *
     * @param array|string $callback Expects $node as first param, $index as second
     * @param array        $scope    External variables passed to callback. Use compact('varName1', 'varName2'...) and extract($scope)
     * @param array        $arg1     Will ba passed as third and futher args to callback.
     * @param array        $arg2     Will ba passed as fourth and futher args to callback, and so on...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function each($callback, $param1 = null, $param2 = null, $param3 = null)
    {
        $paramStructure = null;
        if (func_num_args() > 1) {
            $paramStructure = func_get_args();
            $paramStructure = array_slice($paramStructure, 1);
        }
        foreach ($this->elements as $v) {
            phpQuery::callbackRun($callback, array($v), $paramStructure);
        }

        return $this;
    }

    /**
     * Run callback on actual object.
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function callback($callback, $param1 = null, $param2 = null, $param3 = null)
    {
        $params = func_get_args();
        $params[0] = $this;
        phpQuery::callbackRun($callback, $params);

        return $this;
    }

    /**
     * Enter description here...
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     *
     * @todo add $scope and $args as in each() ???
     */
    public function map($callback, $param1 = null, $param2 = null, $param3 = null)
    {
        //		$stack = array();
        ////		foreach($this->newInstance() as $node) {
        //		foreach($this->newInstance() as $node) {
        //			$result = call_user_func($callback, $node);
        //			if ($result)
        //				$stack[] = $result;
        //		}
        $params = func_get_args();
        array_unshift($params, $this->elements);

        return $this->newInstance(
                        call_user_func_array(array('phpQuery', 'map'), $params)
                        //			phpQuery::map($this->elements, $callback)
        );
    }

    /**
     * Enter description here...
     *
     * @param <type> $key
     * @param <type> $value
     */
    public function data($key, $value = null)
    {
        if (!isset($value)) {
            // TODO? implement specific jQuery behavior od returning parent values
            // is child which we look up doesn't exist
            return phpQuery::data($this->get(0), $key, $value, $this->getDocumentID());
        } else {
            foreach ($this as $node) {
                phpQuery::data($node, $key, $value, $this->getDocumentID());
            }

            return $this;
        }
    }

    /**
     * Enter description here...
     *
     * @param <type> $key
     */
    public function removeData($key)
    {
        foreach ($this as $node) {
            phpQuery::removeData($node, $key, $this->getDocumentID());
        }

        return $this;
    }

    // INTERFACE IMPLEMENTATIONS
    // ITERATOR INTERFACE
    /**
     */
    public function rewind()
    {
        $this->debug('iterating foreach');
        //		phpQuery::selectDocument($this->getDocumentID());
        $this->elementsBackup = $this->elements;
        $this->elementsInterator = $this->elements;
        $this->valid = isset($this->elements[0]) ? 1 : 0;
        // 		$this->elements = $this->valid
        // 			? array($this->elements[0])
        // 			: array();
        $this->current = 0;
    }

    /**
     */
    public function current()
    {
        return $this->elementsInterator[$this->current];
    }

    /**
     */
    public function key()
    {
        return $this->current;
    }

    /**
     * Double-function method.
     *
     * First: main iterator interface method.
     * Second: Returning next sibling, alias for _next().
     *
     * Proper functionality is choosed automagicaly.
     *
     * @see phpQueryObject::_next()
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function next($cssSelector = null)
    {
        //		if ($cssSelector || $this->valid)
        //			return $this->_next($cssSelector);
        $this->valid = isset($this->elementsInterator[$this->current + 1]) ? true : false;
        if (!$this->valid && $this->elementsInterator) {
            $this->elementsInterator = null;
        } elseif ($this->valid) {
            ++$this->current;
        } else {
            return $this->_next($cssSelector);
        }
    }

    /**
     */
    public function valid()
    {
        return $this->valid;
    }

    // ITERATOR INTERFACE END
    // ARRAYACCESS INTERFACE
    /**
     */
    public function offsetExists($offset)
    {
        return $this->find($offset)->size() > 0;
    }

    /**
     */
    public function offsetGet($offset)
    {
        return $this->find($offset);
    }

    /**
     */
    public function offsetSet($offset, $value)
    {
        //		$this->find($offset)->replaceWith($value);
        $this->find($offset)->html($value);
    }

    /**
     */
    public function offsetUnset($offset)
    {
        // empty
        throw new Exception("Can't do unset, use array interface only for calling queries and replacing HTML.");
    }

    // ARRAYACCESS INTERFACE END
    /**
     * Returns node's XPath.
     *
     * @param unknown_type $oneNode
     *
     * @return string
     * @TODO use native getNodePath is avaible
     */
    protected function getNodeXpath($oneNode = null, $namespace = null)
    {
        $return = array();
        $loop = $oneNode ? array($oneNode) : $this->elements;
        //		if ($namespace)
        //			$namespace .= ':';
        foreach ($loop as $node) {
            if ($node instanceof DOMDOCUMENT) {
                $return[] = '';
                continue;
            }
            $xpath = array();
            while (!($node instanceof DOMDOCUMENT)) {
                $i = 1;
                $sibling = $node;
                while ($sibling->previousSibling) {
                    $sibling = $sibling->previousSibling;
                    $isElement = $sibling instanceof DOMELEMENT;
                    if ($isElement && $sibling->tagName == $node->tagName) {
                        $i++;
                    }
                }
                $xpath[] = $this->isXML() ? "*[local-name()='{$node->tagName}'][{$i}]" : "{$node->tagName}[{$i}]";
                $node = $node->parentNode;
            }
            $xpath = implode('/', array_reverse($xpath));
            $return[] = '/'.$xpath;
        }

        return $oneNode ? $return[0] : $return;
    }

    // HELPERS
    public function whois($oneNode = null)
    {
        $return = array();
        $loop = $oneNode ? array($oneNode) : $this->elements;
        foreach ($loop as $node) {
            if (isset($node->tagName)) {
                $tag = in_array($node->tagName, array('php', 'js')) ? strtoupper($node->tagName) : $node->tagName;
                $return[] = $tag
                        .($node->getAttribute('id') ? '#'.$node->getAttribute('id') : '')
                        .($node->getAttribute('class') ? '.'.implode('.', split(' ', $node->getAttribute('class'))) : '')
                        .($node->getAttribute('name') ? '[name="'.$node->getAttribute('name').'"]' : '')
                        .($node->getAttribute('value') && strpos($node->getAttribute('value'), '<'.'?php') === false ? '[value="'.substr(str_replace("\n", '', $node->getAttribute('value')), 0, 15).'"]' : '')
                        .($node->getAttribute('value') && strpos($node->getAttribute('value'), '<'.'?php') !== false ? '[value=PHP]' : '')
                        .($node->getAttribute('selected') ? '[selected]' : '')
                        .($node->getAttribute('checked') ? '[checked]' : '')
                ;
            } elseif ($node instanceof DOMTEXT) {
                if (trim($node->textContent)) {
                    $return[] = 'Text:'.substr(str_replace("\n", ' ', $node->textContent), 0, 15);
                }
            } else {
            }
        }

        return $oneNode && isset($return[0]) ? $return[0] : $return;
    }

    /**
     * Dump htmlOuter and preserve chain. Usefull for debugging.
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public function dump()
    {
        echo 'DUMP #'.(phpQuery::$dumpCount++).' ';
        $debug = phpQuery::$debug;
        phpQuery::$debug = false;
        //		print __FILE__.':'.__LINE__."\n";
        var_dump($this->htmlOuter());

        return $this;
    }

    public function dumpWhois()
    {
        echo 'DUMP #'.(phpQuery::$dumpCount++).' ';
        $debug = phpQuery::$debug;
        phpQuery::$debug = false;
        //		print __FILE__.':'.__LINE__."\n";
        var_dump('whois', $this->whois());
        phpQuery::$debug = $debug;

        return $this;
    }

    public function dumpLength()
    {
        echo 'DUMP #'.(phpQuery::$dumpCount++).' ';
        $debug = phpQuery::$debug;
        phpQuery::$debug = false;
        //		print __FILE__.':'.__LINE__."\n";
        var_dump('length', $this->length());
        phpQuery::$debug = $debug;

        return $this;
    }

    public function dumpTree($html = true, $title = true)
    {
        $output = $title ? 'DUMP #'.(phpQuery::$dumpCount++)." \n" : '';
        $debug = phpQuery::$debug;
        phpQuery::$debug = false;
        foreach ($this->stack() as $node) {
            $output .= $this->__dumpTree($node);
        }
        phpQuery::$debug = $debug;
        echo $html ? nl2br(str_replace(' ', '&nbsp;', $output)) : $output;

        return $this;
    }

    private function __dumpTree($node, $intend = 0)
    {
        $whois = $this->whois($node);
        $return = '';
        if ($whois) {
            $return .= str_repeat(' - ', $intend).$whois."\n";
        }
        if (isset($node->childNodes)) {
            foreach ($node->childNodes as $chNode) {
                $return .= $this->__dumpTree($chNode, $intend + 1);
            }
        }

        return $return;
    }

    /**
     * Dump htmlOuter and stop script execution. Usefull for debugging.
     */
    public function dumpDie()
    {
        echo __FILE__.':'.__LINE__;
        var_dump($this->htmlOuter());
        die();
    }
}

// -- Multibyte Compatibility functions ---------------------------------------
// http://svn.iphonewebdev.com/lace/lib/mb_compat.php

/*
 *  mb_internal_encoding()
 *
 *  Included for mbstring pseudo-compatability.
 */
if (!function_exists('mb_internal_encoding')) {
    function mb_internal_encoding($enc)
    {
        return true;
    }
}

/*
 *  mb_regex_encoding()
 *
 *  Included for mbstring pseudo-compatability.
 */
if (!function_exists('mb_regex_encoding')) {
    function mb_regex_encoding($enc)
    {
        return true;
    }
}

/*
 *  mb_strlen()
 *
 *  Included for mbstring pseudo-compatability.
 */
if (!function_exists('mb_strlen')) {
    function mb_strlen($str)
    {
        return strlen($str);
    }
}

/*
 *  mb_strpos()
 *
 *  Included for mbstring pseudo-compatability.
 */
if (!function_exists('mb_strpos')) {
    function mb_strpos($haystack, $needle, $offset = 0)
    {
        return strpos($haystack, $needle, $offset);
    }
}
/*
 *  mb_stripos()
 *
 *  Included for mbstring pseudo-compatability.
 */
if (!function_exists('mb_stripos')) {
    function mb_stripos($haystack, $needle, $offset = 0)
    {
        return stripos($haystack, $needle, $offset);
    }
}

/*
 *  mb_substr()
 *
 *  Included for mbstring pseudo-compatability.
 */
if (!function_exists('mb_substr')) {
    function mb_substr($str, $start, $length = 0)
    {
        return substr($str, $start, $length);
    }
}

/*
 *  mb_substr_count()
 *
 *  Included for mbstring pseudo-compatability.
 */
if (!function_exists('mb_substr_count')) {
    function mb_substr_count($haystack, $needle)
    {
        return substr_count($haystack, $needle);
    }
}

/**
 * Static namespace for phpQuery functions.
 *
 * @author Tobiasz Cudnik <tobiasz.cudnik/gmail.com>
 */
abstract class phpQuery
{
    /**
     * XXX: Workaround for mbstring problems.
     *
     * @var bool
     */
    public static $mbstringSupport = true;
    public static $debug = false;
    public static $documents = array();
    public static $defaultDocumentID = null;
    //	public static $defaultDoctype = 'html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"';
    /**
     * Applies only to HTML.
     *
     * @var unknown_type
     */
    public static $defaultDoctype = '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">';
    public static $defaultCharset = 'UTF-8';

    /**
     * Static namespace for plugins.
     *
     * @var object
     */
    public static $plugins = array();

    /**
     * List of loaded plugins.
     *
     * @var unknown_type
     */
    public static $pluginsLoaded = array();
    public static $pluginsMethods = array();
    public static $pluginsStaticMethods = array();
    public static $extendMethods = array();

    /**
     * @TODO implement
     */
    public static $extendStaticMethods = array();

    /**
     * Hosts allowed for AJAX connections.
     * Dot '.' means $_SERVER['HTTP_HOST'] (if any).
     *
     * @var array
     */
    public static $ajaxAllowedHosts = array(
        '.',
    );

    /**
     * AJAX settings.
     *
     * @var array
     *            XXX should it be static or not ?
     */
    public static $ajaxSettings = array(
        'url' => '', //TODO
        'global' => true,
        'type' => 'GET',
        'timeout' => null,
        'contentType' => 'application/x-www-form-urlencoded',
        'processData' => true,
//		'async' => true,
        'data' => null,
        'username' => null,
        'password' => null,
        'accepts' => array(
            'xml' => 'application/xml, text/xml',
            'html' => 'text/html',
            'script' => 'text/javascript, application/javascript',
            'json' => 'application/json, text/javascript',
            'text' => 'text/plain',
            '_default' => '*/*',
        ),
    );
    public static $lastModified = null;
    public static $active = 0;
    public static $dumpCount = 0;

    /**
     * Multi-purpose function.
     * Use pq() as shortcut.
     *
     * In below examples, $pq is any result of pq(); function.
     *
     * 1. Import markup into existing document (without any attaching):
     * - Import into selected document:
     *   pq('<div/>')				// DOESNT accept text nodes at beginning of input string !
     * - Import into document with ID from $pq->getDocumentID():
     *   pq('<div/>', $pq->getDocumentID())
     * - Import into same document as DOMNode belongs to:
     *   pq('<div/>', DOMNode)
     * - Import into document from phpQuery object:
     *   pq('<div/>', $pq)
     *
     * 2. Run query:
     * - Run query on last selected document:
     *   pq('div.myClass')
     * - Run query on document with ID from $pq->getDocumentID():
     *   pq('div.myClass', $pq->getDocumentID())
     * - Run query on same document as DOMNode belongs to and use node(s)as root for query:
     *   pq('div.myClass', DOMNode)
     * - Run query on document from phpQuery object
     *   and use object's stack as root node(s) for query:
     *   pq('div.myClass', $pq)
     *
     * @param string|DOMNode|DOMNodeList|array $arg1    HTML markup, CSS Selector, DOMNode or array of DOMNodes
     * @param string|phpQueryObject|DOMNode    $context DOM ID from $pq->getDocumentID(), phpQuery object (determines also query root) or DOMNode (determines also query root)
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery|QueryTemplatesPhpQuery|false
     *                                                                                                                        phpQuery object or false in case of error.
     */
    public function __destruct()
    {
        //echo 'destroying the object';
    }

    public static function pq($arg1, $context = null)
    {
        if ($arg1 instanceof DOMNODE && !isset($context)) {
            foreach (self::$documents as $documentWrapper) {
                $compare = $arg1 instanceof DOMDocument ? $arg1 : $arg1->ownerDocument;
                if ($documentWrapper->document->isSameNode($compare)) {
                    $context = $documentWrapper->id;
                }
            }
        }
        if (!$context) {
            $domId = self::$defaultDocumentID;
            if (!$domId) {
                throw new Exception("Can't use last created DOM, because there isn't any. Use phpQuery::newDocument() first.");
            }
            //		} else if (is_object($context) && ($context instanceof PHPQUERY || is_subclass_of($context, 'phpQueryObject')))
        } elseif (is_object($context) && $context instanceof phpQueryObject) {
            $domId = $context->getDocumentID();
        } elseif ($context instanceof DOMDOCUMENT) {
            $domId = self::getDocumentID($context);
            if (!$domId) {
                //throw new Exception('Orphaned DOMDocument');
                $domId = self::newDocument($context)->getDocumentID();
            }
        } elseif ($context instanceof DOMNODE) {
            $domId = self::getDocumentID($context);
            if (!$domId) {
                throw new Exception('Orphaned DOMNode');
                //				$domId = self::newDocument($context->ownerDocument);
            }
        } else {
            $domId = $context;
        }
        if ($arg1 instanceof phpQueryObject) {
            //		if (is_object($arg1) && (get_class($arg1) == 'phpQueryObject' || $arg1 instanceof PHPQUERY || is_subclass_of($arg1, 'phpQueryObject'))) {
            /**
             * Return $arg1 or import $arg1 stack if document differs:
             * pq(pq('<div/>')).
             */
            if ($arg1->getDocumentID() == $domId) {
                return $arg1;
            }
            $class = get_class($arg1);
            // support inheritance by passing old object to overloaded constructor
            $phpQuery = $class != 'phpQuery' ? new $class($arg1, $domId) : new phpQueryObject($domId);
            $phpQuery->elements = array();
            foreach ($arg1->elements as $node) {
                $phpQuery->elements[] = $phpQuery->document->importNode($node, true);
            }

            return $phpQuery;
        } elseif ($arg1 instanceof DOMNODE || (is_array($arg1) && isset($arg1[0]) && $arg1[0] instanceof DOMNODE)) {
            /*
             * Wrap DOM nodes with phpQuery object, import into document when needed:
             * pq(array($domNode1, $domNode2))
             */
            $phpQuery = new phpQueryObject($domId);
            if (!($arg1 instanceof DOMNODELIST) && !is_array($arg1)) {
                $arg1 = array($arg1);
            }
            $phpQuery->elements = array();
            foreach ($arg1 as $node) {
                $sameDocument = $node->ownerDocument instanceof DOMDOCUMENT
                        && !$node->ownerDocument->isSameNode($phpQuery->document);
                $phpQuery->elements[] = $sameDocument ? $phpQuery->document->importNode($node, true) : $node;
            }

            return $phpQuery;
        } elseif (self::isMarkup($arg1)) {
            /*
             * Import HTML:
             * pq('<div/>')
             */
            $phpQuery = new phpQueryObject($domId);

            return $phpQuery->newInstance(
                            $phpQuery->documentWrapper->import($arg1)
            );
        } else {
            /*
             * Run CSS query:
             * pq('div.myClass')
             */
            $phpQuery = new phpQueryObject($domId);
            //			if ($context && ($context instanceof PHPQUERY || is_subclass_of($context, 'phpQueryObject')))
            if ($context && $context instanceof phpQueryObject) {
                $phpQuery->elements = $context->elements;
            } elseif ($context && $context instanceof DOMNODELIST) {
                $phpQuery->elements = array();
                foreach ($context as $node) {
                    $phpQuery->elements[] = $node;
                }
            } elseif ($context && $context instanceof DOMNODE) {
                $phpQuery->elements = array($context);
            }

            return $phpQuery->find($arg1);
        }
    }

    /**
     * Sets default document to $id. Document has to be loaded prior
     * to using this method.
     * $id can be retrived via getDocumentID() or getDocumentIDRef().
     *
     * @param unknown_type $id
     */
    public static function selectDocument($id)
    {
        $id = self::getDocumentID($id);
        self::debug("Selecting document '$id' as default one");
        self::$defaultDocumentID = self::getDocumentID($id);
    }

    /**
     * Returns document with id $id or last used as phpQueryObject.
     * $id can be retrived via getDocumentID() or getDocumentIDRef().
     * Chainable.
     *
     * @see phpQuery::selectDocument()
     *
     * @param unknown_type $id
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public static function getDocument($id = null)
    {
        if ($id) {
            self::selectDocument($id);
        } else {
            $id = self::$defaultDocumentID;
        }

        return new phpQueryObject($id);
    }

    /**
     * Creates new document from markup.
     * Chainable.
     *
     * @param unknown_type $markup
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public static function newDocument($markup = null, $contentType = null)
    {
        if (!$markup) {
            $markup = '';
        }
        $documentID = self::createDocumentWrapper($markup, $contentType);

        return new phpQueryObject($documentID);
    }

    /**
     * Creates new document from markup.
     * Chainable.
     *
     * @param unknown_type $markup
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public static function newDocumentHTML($markup = null, $charset = null)
    {
        $contentType = $charset ? ";charset=$charset" : '';

        return self::newDocument($markup, "text/html{$contentType}");
    }

    /**
     * Creates new document from markup.
     * Chainable.
     *
     * @param unknown_type $markup
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public static function newDocumentXML($markup = null, $charset = null)
    {
        $contentType = $charset ? ";charset=$charset" : '';

        return self::newDocument($markup, "text/xml{$contentType}");
    }

    /**
     * Creates new document from markup.
     * Chainable.
     *
     * @param unknown_type $markup
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public static function newDocumentXHTML($markup = null, $charset = null)
    {
        $contentType = $charset ? ";charset=$charset" : '';

        return self::newDocument($markup, "application/xhtml+xml{$contentType}");
    }

    /**
     * Creates new document from markup.
     * Chainable.
     *
     * @param unknown_type $markup
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public static function newDocumentPHP($markup = null, $contentType = 'text/html')
    {
        // TODO pass charset to phpToMarkup if possible (use DOMDocumentWrapper function)
        $markup = self::phpToMarkup($markup, self::$defaultCharset);

        return self::newDocument($markup, $contentType);
    }

    public static function phpToMarkup($php, $charset = 'utf-8')
    {
        $regexes = array(
            '@(<(?!\\?)(?:[^>]|\\?>)+\\w+\\s*=\\s*)(\')([^\']*)<'.'?php?(.*?)(?:\\?>)([^\']*)\'@s',
            '@(<(?!\\?)(?:[^>]|\\?>)+\\w+\\s*=\\s*)(")([^"]*)<'.'?php?(.*?)(?:\\?>)([^"]*)"@s',
        );
        foreach ($regexes as $regex) {
            while (preg_match($regex, $php, $matches)) {
                $php = preg_replace_callback(
                        $regex,
//					create_function('$m, $charset = "'.$charset.'"',
//						'return $m[1].$m[2]
//							.htmlspecialchars("<"."?php".$m[4]."?".">", ENT_QUOTES|ENT_NOQUOTES, $charset)
//							.$m[5].$m[2];'
//					),
                        array('phpQuery', '_phpToMarkupCallback'), $php
                );
            }
        }
        $regex = '@(^|>[^<]*)+?(<\?php(.*?)(\?>))@s';
        //preg_match_all($regex, $php, $matches);
        //var_dump($matches);
        $php = preg_replace($regex, '\\1<php><!-- \\3 --></php>', $php);

        return $php;
    }

    public static function _phpToMarkupCallback($php, $charset = 'utf-8')
    {
        return $m[1].$m[2]
                .htmlspecialchars('<'.'?php'.$m[4].'?'.'>', ENT_QUOTES | ENT_NOQUOTES, $charset)
                .$m[5].$m[2];
    }

    public static function _markupToPHPCallback($m)
    {
        return '<'.'?php '.htmlspecialchars_decode($m[1]).' ?'.'>';
    }

    /**
     * Converts document markup containing PHP code generated by phpQuery::php()
     * into valid (executable) PHP code syntax.
     *
     * @param string|phpQueryObject $content
     *
     * @return string PHP code.
     */
    public static function markupToPHP($content)
    {
        if ($content instanceof phpQueryObject) {
            $content = $content->markupOuter();
        }
        /* <php>...</php> to <?php...? > */
        $content = preg_replace_callback(
                '@<php>\s*<!--(.*?)-->\s*</php>@s',
//			create_function('$m',
//				'return "<'.'?php ".htmlspecialchars_decode($m[1])." ?'.'>";'
//			),
                array('phpQuery', '_markupToPHPCallback'), $content
        );
        /* <node attr='< ?php ? >'> extra space added to save highlighters */
        $regexes = array(
            '@(<(?!\\?)(?:[^>]|\\?>)+\\w+\\s*=\\s*)(\')([^\']*)(?:&lt;|%3C)\\?(?:php)?(.*?)(?:\\?(?:&gt;|%3E))([^\']*)\'@s',
            '@(<(?!\\?)(?:[^>]|\\?>)+\\w+\\s*=\\s*)(")([^"]*)(?:&lt;|%3C)\\?(?:php)?(.*?)(?:\\?(?:&gt;|%3E))([^"]*)"@s',
        );
        foreach ($regexes as $regex) {
            while (preg_match($regex, $content)) {
                $content = preg_replace_callback(
                        $regex, create_function('$m', 'return $m[1].$m[2].$m[3]."<?php "
					.str_replace(
						array("%20", "%3E", "%09", "&#10;", "&#9;", "%7B", "%24", "%7D", "%22", "%5B", "%5D"),
						array(" ", ">", "	", "\n", "	", "{", "$", "}", \'"\', "[", "]"),
						htmlspecialchars_decode($m[4])
					)
					." ?>".$m[5].$m[2];'
                        ), $content
                );
            }
        }

        return $content;
    }

    /**
     * Creates new document from file $file.
     * Chainable.
     *
     * @param string $file URLs allowed. See File wrapper page at php.net for more supported sources.
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public static function newDocumentFile($file, $contentType = null)
    {
        $documentID = self::createDocumentWrapper(
                        file_get_contents($file), $contentType
        );

        return new phpQueryObject($documentID);
    }

    /**
     * Creates new document from markup.
     * Chainable.
     *
     * @param unknown_type $markup
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public static function newDocumentFileHTML($file, $charset = null)
    {
        $contentType = $charset ? ";charset=$charset" : '';

        return self::newDocumentFile($file, "text/html{$contentType}");
    }

    /**
     * Creates new document from markup.
     * Chainable.
     *
     * @param unknown_type $markup
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public static function newDocumentFileXML($file, $charset = null)
    {
        $contentType = $charset ? ";charset=$charset" : '';

        return self::newDocumentFile($file, "text/xml{$contentType}");
    }

    /**
     * Creates new document from markup.
     * Chainable.
     *
     * @param unknown_type $markup
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public static function newDocumentFileXHTML($file, $charset = null)
    {
        $contentType = $charset ? ";charset=$charset" : '';

        return self::newDocumentFile($file, "application/xhtml+xml{$contentType}");
    }

    /**
     * Creates new document from markup.
     * Chainable.
     *
     * @param unknown_type $markup
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     */
    public static function newDocumentFilePHP($file, $contentType = null)
    {
        return self::newDocumentPHP(file_get_contents($file), $contentType);
    }

    /**
     * Reuses existing DOMDocument object.
     * Chainable.
     *
     * @param $document DOMDocument
     *
     * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
     * @TODO support DOMDocument
     */
    public static function loadDocument($document)
    {
        // TODO
        die('TODO loadDocument');
    }

    /**
     * Enter description here...
     *
     * @param unknown_type $html
     * @param unknown_type $domId
     *
     * @return unknown New DOM ID
     *
     * @todo support PHP tags in input
     * @todo support passing DOMDocument object from self::loadDocument
     */
    protected static function createDocumentWrapper($html, $contentType = null, $documentID = null)
    {
        if (function_exists('domxml_open_mem')) {
            throw new Exception("Old PHP4 DOM XML extension detected. phpQuery won't work until this extension is enabled.");
        }
        //		$id = $documentID
        //			? $documentID
        //			: md5(microtime());
        $document = null;
        if ($html instanceof DOMDOCUMENT) {
            if (self::getDocumentID($html)) {
                // document already exists in phpQuery::$documents, make a copy
                $document = clone $html;
            } else {
                // new document, add it to phpQuery::$documents
                $wrapper = new DOMDocumentWrapper($html, $contentType, $documentID);
            }
        } else {
            $wrapper = new DOMDocumentWrapper($html, $contentType, $documentID);
        }
        //		$wrapper->id = $id;
        // bind document
        self::$documents[$wrapper->id] = $wrapper;
        // remember last loaded document
        self::selectDocument($wrapper->id);

        return $wrapper->id;
    }

    /**
     * Extend class namespace.
     *
     * @param string|array $target
     * @param array        $source
     * @TODO support string $source
     *
     * @return unknown_type
     */
    public static function extend($target, $source)
    {
        switch ($target) {
            case 'phpQueryObject':
                $targetRef = &self::$extendMethods;
                $targetRef2 = &self::$pluginsMethods;
                break;
            case 'phpQuery':
                $targetRef = &self::$extendStaticMethods;
                $targetRef2 = &self::$pluginsStaticMethods;
                break;
            default:
                throw new Exception('Unsupported $target type');
        }
        if (is_string($source)) {
            $source = array($source => $source);
        }
        foreach ($source as $method => $callback) {
            if (isset($targetRef[$method])) {
                //				throw new Exception
                self::debug("Duplicate method '{$method}', can\'t extend '{$target}'");
                continue;
            }
            if (isset($targetRef2[$method])) {
                //				throw new Exception
                self::debug("Duplicate method '{$method}' from plugin '{$targetRef2[$method]}',"
                        ." can\'t extend '{$target}'");
                continue;
            }
            $targetRef[$method] = $callback;
        }

        return true;
    }

    /**
     * Extend phpQuery with $class from $file.
     *
     * @param string $class Extending class name. Real class name can be prepended phpQuery_.
     * @param string $file  Filename to include. Defaults to "{$class}.php".
     */
    public static function plugin($class, $file = null)
    {
        // TODO $class checked agains phpQuery_$class
        //		if (strpos($class, 'phpQuery') === 0)
        //			$class = substr($class, 8);
        if (in_array($class, self::$pluginsLoaded)) {
            return true;
        }
        if (!$file) {
            $file = $class.'.php';
        }
        $objectClassExists = class_exists('phpQueryObjectPlugin_'.$class);
        $staticClassExists = class_exists('phpQueryPlugin_'.$class);
        if (!$objectClassExists && !$staticClassExists) {
            require_once $file;
        }
        self::$pluginsLoaded[] = $class;
        // static methods
        if (class_exists('phpQueryPlugin_'.$class)) {
            $realClass = 'phpQueryPlugin_'.$class;
            $vars = get_class_vars($realClass);
            $loop = isset($vars['phpQueryMethods'])
                    && !is_null($vars['phpQueryMethods']) ? $vars['phpQueryMethods'] : get_class_methods($realClass);
            foreach ($loop as $method) {
                if ($method == '__initialize') {
                    continue;
                }
                if (!is_callable(array($realClass, $method))) {
                    continue;
                }
                if (isset(self::$pluginsStaticMethods[$method])) {
                    throw new Exception("Duplicate method '{$method}' from plugin '{$c}' conflicts with same method from plugin '".self::$pluginsStaticMethods[$method]."'");

                    return;
                }
                self::$pluginsStaticMethods[$method] = $class;
            }
            if (method_exists($realClass, '__initialize')) {
                call_user_func_array(array($realClass, '__initialize'), array());
            }
        }
        // object methods
        if (class_exists('phpQueryObjectPlugin_'.$class)) {
            $realClass = 'phpQueryObjectPlugin_'.$class;
            $vars = get_class_vars($realClass);
            $loop = isset($vars['phpQueryMethods'])
                    && !is_null($vars['phpQueryMethods']) ? $vars['phpQueryMethods'] : get_class_methods($realClass);
            foreach ($loop as $method) {
                if (!is_callable(array($realClass, $method))) {
                    continue;
                }
                if (isset(self::$pluginsMethods[$method])) {
                    throw new Exception("Duplicate method '{$method}' from plugin '{$c}' conflicts with same method from plugin '".self::$pluginsMethods[$method]."'");
                    continue;
                }
                self::$pluginsMethods[$method] = $class;
            }
        }

        return true;
    }

    /**
     * Unloades all or specified document from memory.
     *
     * @param mixed $documentID @see phpQuery::getDocumentID() for supported types.
     */
    public static function unloadDocuments($id = null)
    {
        if (isset($id)) {
            if ($id = self::getDocumentID($id)) {
                unset(self::$documents[$id]);
            }
        } else {
            foreach (self::$documents as $k => $v) {
                unset(self::$documents[$k]);
            }
        }
    }

    /**
     * Parses phpQuery object or HTML result against PHP tags and makes them active.
     *
     * @param phpQuery|string $content
     *
     * @deprecated
     *
     * @return string
     */
    public static function unsafePHPTags($content)
    {
        return self::markupToPHP($content);
    }

    public static function DOMNodeListToArray($DOMNodeList)
    {
        $array = array();
        if (!$DOMNodeList) {
            return $array;
        }
        foreach ($DOMNodeList as $node) {
            $array[] = $node;
        }

        return $array;
    }

    /**
     * Checks if $input is HTML string, which has to start with '<'.
     *
     * @deprecated
     *
     * @param string $input
     *
     * @return bool
     *
     * @todo still used ?
     */
    public static function isMarkup($input)
    {
        return !is_array($input) && substr(trim($input), 0, 1) == '<';
    }

    public static function debug($text)
    {
        if (self::$debug) {
            print var_dump($text);
        }
    }

    /**
     * Make an AJAX request.
     *
     * @param array See $options http://docs.jquery.com/Ajax/jQuery.ajax#toptions
     *                           Additional options are:
     *                           'document' - document for global events, @see phpQuery::getDocumentID()
     *                           'referer' - implemented
     *                           'requested_with' - TODO; not implemented (X-Requested-With)
     *
     * @return Zend_Http_Client
     *
     * @link http://docs.jquery.com/Ajax/jQuery.ajax
     *
     * @TODO $options['cache']
     * @TODO $options['processData']
     * @TODO $options['xhr']
     * @TODO $options['data'] as string
     * @TODO XHR interface
     */
    public static function ajax($options = array(), $xhr = null)
    {
        $options = array_merge(
                self::$ajaxSettings, $options
        );
        $documentID = isset($options['document']) ? self::getDocumentID($options['document']) : null;
        if ($xhr) {
            // reuse existing XHR object, but clean it up
            $client = $xhr;
            //			$client->setParameterPost(null);
            //			$client->setParameterGet(null);
            $client->setAuth(false);
            $client->setHeaders('If-Modified-Since', null);
            $client->setHeaders('Referer', null);
            $client->resetParameters();
        } else {
            // create new XHR object
            require_once 'Zend/Http/Client.php';
            $client = new Zend_Http_Client();
            $client->setCookieJar();
        }
        if (isset($options['timeout'])) {
            $client->setConfig(array(
                'timeout' => $options['timeout'],
            ));
        }
        //			'maxredirects' => 0,
        foreach (self::$ajaxAllowedHosts as $k => $host) {
            if ($host == '.' && isset($_SERVER['HTTP_HOST'])) {
                self::$ajaxAllowedHosts[$k] = $_SERVER['HTTP_HOST'];
            }
        }
        $host = parse_url($options['url'], PHP_URL_HOST);
        if (!in_array($host, self::$ajaxAllowedHosts)) {
            throw new Exception("Request not permitted, host '$host' not present in "
                    .'phpQuery::$ajaxAllowedHosts');
        }
        // JSONP
        $jsre = '/=\\?(&|$)/';
        if (isset($options['dataType']) && $options['dataType'] == 'jsonp') {
            $jsonpCallbackParam = $options['jsonp'] ? $options['jsonp'] : 'callback';
            if (strtolower($options['type']) == 'get') {
                if (!preg_match($jsre, $options['url'])) {
                    $sep = strpos($options['url'], '?') ? '&' : '?';
                    $options['url'] .= "$sep$jsonpCallbackParam=?";
                }
            } elseif ($options['data']) {
                $jsonp = false;
                foreach ($options['data'] as $n => $v) {
                    if ($v == '?') {
                        $jsonp = true;
                    }
                }
                if (!$jsonp) {
                    $options['data'][$jsonpCallbackParam] = '?';
                }
            }
            $options['dataType'] = 'json';
        }
        if (isset($options['dataType']) && $options['dataType'] == 'json') {
            $jsonpCallback = 'json_'.md5(microtime());
            $jsonpData = $jsonpUrl = false;
            if ($options['data']) {
                foreach ($options['data'] as $n => $v) {
                    if ($v == '?') {
                        $jsonpData = $n;
                    }
                }
            }
            if (preg_match($jsre, $options['url'])) {
                $jsonpUrl = true;
            }
            if ($jsonpData !== false || $jsonpUrl) {
                // remember callback name for httpData()
                $options['_jsonp'] = $jsonpCallback;
                if ($jsonpData !== false) {
                    $options['data'][$jsonpData] = $jsonpCallback;
                }
                if ($jsonpUrl) {
                    $options['url'] = preg_replace($jsre, "=$jsonpCallback\\1", $options['url']);
                }
            }
        }
        $client->setUri($options['url']);
        $client->setMethod(strtoupper($options['type']));
        if (isset($options['referer']) && $options['referer']) {
            $client->setHeaders('Referer', $options['referer']);
        }
        $client->setHeaders(array(
//			'content-type' => $options['contentType'],
            'User-Agent' => 'Mozilla/5.0 (X11; U; Linux x86; en-US; rv:1.9.0.5) Gecko'
            .'/2008122010 Firefox/3.0.5',
            // TODO custom charset
            'Accept-Charset' => 'ISO-8859-1,utf-8;q=0.7,*;q=0.7',
// 	 		'Connection' => 'keep-alive',
// 			'Accept' => 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
            'Accept-Language' => 'en-us,en;q=0.5',
        ));
        if ($options['username']) {
            $client->setAuth($options['username'], $options['password']);
        }
        if (isset($options['ifModified']) && $options['ifModified']) {
            $client->setHeaders('If-Modified-Since', self::$lastModified ? self::$lastModified : 'Thu, 01 Jan 1970 00:00:00 GMT'
            );
        }
        $client->setHeaders('Accept', isset($options['dataType'])
                && isset(self::$ajaxSettings['accepts'][$options['dataType']]) ? self::$ajaxSettings['accepts'][$options['dataType']].', */*' : self::$ajaxSettings['accepts']['_default']
        );
        // TODO $options['processData']
        if ($options['data'] instanceof phpQueryObject) {
            $serialized = $options['data']->serializeArray($options['data']);
            $options['data'] = array();
            foreach ($serialized as $r) {
                $options['data'][$r['name']] = $r['value'];
            }
        }
        if (strtolower($options['type']) == 'get') {
            $client->setParameterGet($options['data']);
        } elseif (strtolower($options['type']) == 'post') {
            $client->setEncType($options['contentType']);
            $client->setParameterPost($options['data']);
        }
        if (self::$active == 0 && $options['global']) {
            phpQueryEvents::trigger($documentID, 'ajaxStart');
        }
        ++self::$active;
        // beforeSend callback
        if (isset($options['beforeSend']) && $options['beforeSend']) {
            self::callbackRun($options['beforeSend'], array($client));
        }
        // ajaxSend event
        if ($options['global']) {
            phpQueryEvents::trigger($documentID, 'ajaxSend', array($client, $options));
        }
        if (self::$debug) {
            self::debug("{$options['type']}: {$options['url']}\n");
            self::debug('Options: <pre>'.var_export($options, true)."</pre>\n");
            //			if ($client->getCookieJar())
            //				self::debug("Cookies: <pre>".var_export($client->getCookieJar()->getMatchingCookies($options['url']), true)."</pre>\n");
        }
        // request
        $response = $client->request();
        if (self::$debug) {
            self::debug('Status: '.$response->getStatus().' / '.$response->getMessage());
            self::debug($client->getLastRequest());
            self::debug($response->getHeaders());
        }
        if ($response->isSuccessful()) {
            // XXX tempolary
            self::$lastModified = $response->getHeader('Last-Modified');
            $data = self::httpData($response->getBody(), $options['dataType'], $options);
            if (isset($options['success']) && $options['success']) {
                self::callbackRun($options['success'], array($data, $response->getStatus(), $options));
            }
            if ($options['global']) {
                phpQueryEvents::trigger($documentID, 'ajaxSuccess', array($client, $options));
            }
        } else {
            if (isset($options['error']) && $options['error']) {
                self::callbackRun($options['error'], array($client, $response->getStatus(), $response->getMessage()));
            }
            if ($options['global']) {
                phpQueryEvents::trigger($documentID, 'ajaxError', array($client, /* $response->getStatus(), */$response->getMessage(), $options));
            }
        }
        if (isset($options['complete']) && $options['complete']) {
            self::callbackRun($options['complete'], array($client, $response->getStatus()));
        }
        if ($options['global']) {
            phpQueryEvents::trigger($documentID, 'ajaxComplete', array($client, $options));
        }
        if ($options['global'] && !--self::$active) {
            phpQueryEvents::trigger($documentID, 'ajaxStop');
        }

        return $client;
        //		if (is_null($domId))
        //			$domId = self::$defaultDocumentID ? self::$defaultDocumentID : false;
        //		return new phpQueryAjaxResponse($response, $domId);
    }

    protected static function httpData($data, $type, $options)
    {
        if (isset($options['dataFilter']) && $options['dataFilter']) {
            $data = self::callbackRun($options['dataFilter'], array($data, $type));
        }
        if (is_string($data)) {
            if ($type == 'json') {
                if (isset($options['_jsonp']) && $options['_jsonp']) {
                    $data = preg_replace('/^\s*\w+\((.*)\)\s*$/s', '$1', $data);
                }
                $data = self::parseJSON($data);
            }
        }

        return $data;
    }

    /**
     * Enter description here...
     *
     * @param array|phpQuery $data
     */
    public static function param($data)
    {
        return http_build_query($data, null, '&');
    }

    public static function get($url, $data = null, $callback = null, $type = null)
    {
        if (!is_array($data)) {
            $callback = $data;
            $data = null;
        }
        // TODO some array_values on this shit
        return self::ajax(array(
                    'type' => 'GET',
                    'url' => $url,
                    'data' => $data,
                    'success' => $callback,
                    'dataType' => $type,
                ));
    }

    public static function post($url, $data = null, $callback = null, $type = null)
    {
        if (!is_array($data)) {
            $callback = $data;
            $data = null;
        }

        return self::ajax(array(
                    'type' => 'POST',
                    'url' => $url,
                    'data' => $data,
                    'success' => $callback,
                    'dataType' => $type,
                ));
    }

    public static function getJSON($url, $data = null, $callback = null)
    {
        if (!is_array($data)) {
            $callback = $data;
            $data = null;
        }
        // TODO some array_values on this shit
        return self::ajax(array(
                    'type' => 'GET',
                    'url' => $url,
                    'data' => $data,
                    'success' => $callback,
                    'dataType' => 'json',
                ));
    }

    public static function ajaxSetup($options)
    {
        self::$ajaxSettings = array_merge(
                self::$ajaxSettings, $options
        );
    }

    public static function ajaxAllowHost($host1, $host2 = null, $host3 = null)
    {
        $loop = is_array($host1) ? $host1 : func_get_args();
        foreach ($loop as $host) {
            if ($host && !in_array($host, self::$ajaxAllowedHosts)) {
                self::$ajaxAllowedHosts[] = $host;
            }
        }
    }

    public static function ajaxAllowURL($url1, $url2 = null, $url3 = null)
    {
        $loop = is_array($url1) ? $url1 : func_get_args();
        foreach ($loop as $url) {
            self::ajaxAllowHost(parse_url($url, PHP_URL_HOST));
        }
    }

    /**
     * Returns JSON representation of $data.
     *
     * @static
     *
     * @param mixed $data
     *
     * @return string
     */
    public static function toJSON($data)
    {
        if (function_exists('json_encode')) {
            return json_encode($data);
        }
        require_once 'Zend/Json/Encoder.php';

        return Zend_Json_Encoder::encode($data);
    }

    /**
     * Parses JSON into proper PHP type.
     *
     * @static
     *
     * @param string $json
     *
     * @return mixed
     */
    public static function parseJSON($json)
    {
        if (function_exists('json_decode')) {
            $return = json_decode(trim($json), true);
            // json_decode and UTF8 issues
            if (isset($return)) {
                return $return;
            }
        }
        require_once 'Zend/Json/Decoder.php';

        return Zend_Json_Decoder::decode($json);
    }

    /**
     * Returns source's document ID.
     *
     * @param $source DOMNode|phpQueryObject
     *
     * @return string
     */
    public static function getDocumentID($source)
    {
        if ($source instanceof DOMDOCUMENT) {
            foreach (self::$documents as $id => $document) {
                if ($source->isSameNode($document->document)) {
                    return $id;
                }
            }
        } elseif ($source instanceof DOMNODE) {
            foreach (self::$documents as $id => $document) {
                if ($source->ownerDocument->isSameNode($document->document)) {
                    return $id;
                }
            }
        } elseif ($source instanceof phpQueryObject) {
            return $source->getDocumentID();
        } elseif (is_string($source) && isset(self::$documents[$source])) {
            return $source;
        }
    }

    /**
     * Get DOMDocument object related to $source.
     * Returns null if such document doesn't exist.
     *
     * @param $source DOMNode|phpQueryObject|string
     *
     * @return string
     */
    public static function getDOMDocument($source)
    {
        if ($source instanceof DOMDOCUMENT) {
            return $source;
        }
        $source = self::getDocumentID($source);

        return $source ? self::$documents[$id]['document'] : null;
    }

    // UTILITIES
    // http://docs.jquery.com/Utilities

    /**
     * @return unknown_type
     *
     * @link http://docs.jquery.com/Utilities/jQuery.makeArray
     */
    public static function makeArray($obj)
    {
        $array = array();
        if (is_object($object) && $object instanceof DOMNODELIST) {
            foreach ($object as $value) {
                $array[] = $value;
            }
        } elseif (is_object($object) && !($object instanceof Iterator)) {
            foreach (get_object_vars($object) as $name => $value) {
                $array[0][$name] = $value;
            }
        } else {
            foreach ($object as $name => $value) {
                $array[0][$name] = $value;
            }
        }

        return $array;
    }

    public static function inArray($value, $array)
    {
        return in_array($value, $array);
    }

    /**
     * @param $object
     * @param $callback
     *
     * @return unknown_type
     *
     * @link http://docs.jquery.com/Utilities/jQuery.each
     */
    public static function each($object, $callback, $param1 = null, $param2 = null, $param3 = null)
    {
        $paramStructure = null;
        if (func_num_args() > 2) {
            $paramStructure = func_get_args();
            $paramStructure = array_slice($paramStructure, 2);
        }
        if (is_object($object) && !($object instanceof Iterator)) {
            foreach (get_object_vars($object) as $name => $value) {
                self::callbackRun($callback, array($name, $value), $paramStructure);
            }
        } else {
            foreach ($object as $name => $value) {
                self::callbackRun($callback, array($name, $value), $paramStructure);
            }
        }
    }

    /**
     * @link http://docs.jquery.com/Utilities/jQuery.map
     */
    public static function map($array, $callback, $param1 = null, $param2 = null, $param3 = null)
    {
        $result = array();
        $paramStructure = null;
        if (func_num_args() > 2) {
            $paramStructure = func_get_args();
            $paramStructure = array_slice($paramStructure, 2);
        }
        foreach ($array as $v) {
            $vv = self::callbackRun($callback, array($v), $paramStructure);
            //			$callbackArgs = $args;
            //			foreach($args as $i => $arg) {
            //				$callbackArgs[$i] = $arg instanceof CallbackParam
            //					? $v
            //					: $arg;
            //			}
            //			$vv = call_user_func_array($callback, $callbackArgs);
            if (is_array($vv)) {
                foreach ($vv as $vvv) {
                    $result[] = $vvv;
                }
            } elseif ($vv !== null) {
                $result[] = $vv;
            }
        }

        return $result;
    }

    /**
     * @param $callback Callback
     * @param $params
     * @param $paramStructure
     *
     * @return unknown_type
     */
    public static function callbackRun($callback, $params = array(), $paramStructure = null)
    {
        if (!$callback) {
            return;
        }
        if ($callback instanceof CallbackParameterToReference) {
            // TODO support ParamStructure to select which $param push to reference
            if (isset($params[0])) {
                $callback->callback = $params[0];
            }

            return true;
        }
        if ($callback instanceof Callback) {
            $paramStructure = $callback->params;
            $callback = $callback->callback;
        }
        if (!$paramStructure) {
            return call_user_func_array($callback, $params);
        }
        $p = 0;
        foreach ($paramStructure as $i => $v) {
            $paramStructure[$i] = $v instanceof CallbackParam ? $params[$p++] : $v;
        }

        return call_user_func_array($callback, $paramStructure);
    }

    /**
     * Merge 2 phpQuery objects.
     *
     * @param array $one
     * @param array $two
     * @protected
     *
     * @todo node lists, phpQueryObject
     */
    public static function merge($one, $two)
    {
        $elements = $one->elements;
        foreach ($two->elements as $node) {
            $exists = false;
            foreach ($elements as $node2) {
                if ($node2->isSameNode($node)) {
                    $exists = true;
                }
            }
            if (!$exists) {
                $elements[] = $node;
            }
        }

        return $elements;
        //		$one = $one->newInstance();
        //		$one->elements = $elements;
        //		return $one;
    }

    /**
     * @param $array
     * @param $callback
     * @param $invert
     *
     * @return unknown_type
     *
     * @link http://docs.jquery.com/Utilities/jQuery.grep
     */
    public static function grep($array, $callback, $invert = false)
    {
        $result = array();
        foreach ($array as $k => $v) {
            $r = call_user_func_array($callback, array($v, $k));
            if ($r === !(bool) $invert) {
                $result[] = $v;
            }
        }

        return $result;
    }

    public static function unique($array)
    {
        return array_unique($array);
    }

    /**
     * @param $function
     *
     * @return unknown_type
     * @TODO there are problems with non-static methods, second parameter pass it
     * 	but doesnt verify is method is really callable
     */
    public static function isFunction($function)
    {
        return is_callable($function);
    }

    public static function trim($str)
    {
        return trim($str);
    }

    /* PLUGINS NAMESPACE */

    /**
     * @param $url
     * @param $callback
     * @param $param1
     * @param $param2
     * @param $param3
     *
     * @return phpQueryObject
     */
    public static function browserGet($url, $callback, $param1 = null, $param2 = null, $param3 = null)
    {
        if (self::plugin('WebBrowser')) {
            $params = func_get_args();

            return self::callbackRun(array(self::$plugins, 'browserGet'), $params);
        } else {
            self::debug('WebBrowser plugin not available...');
        }
    }

    /**
     * @param $url
     * @param $data
     * @param $callback
     * @param $param1
     * @param $param2
     * @param $param3
     *
     * @return phpQueryObject
     */
    public static function browserPost($url, $data, $callback, $param1 = null, $param2 = null, $param3 = null)
    {
        if (self::plugin('WebBrowser')) {
            $params = func_get_args();

            return self::callbackRun(array(self::$plugins, 'browserPost'), $params);
        } else {
            self::debug('WebBrowser plugin not available...');
        }
    }

    /**
     * @param $ajaxSettings
     * @param $callback
     * @param $param1
     * @param $param2
     * @param $param3
     *
     * @return phpQueryObject
     */
    public static function browser($ajaxSettings, $callback, $param1 = null, $param2 = null, $param3 = null)
    {
        if (self::plugin('WebBrowser')) {
            $params = func_get_args();

            return self::callbackRun(array(self::$plugins, 'browser'), $params);
        } else {
            self::debug('WebBrowser plugin not available...');
        }
    }

    /**
     * @param $code
     *
     * @return string
     */
    public static function php($code)
    {
        return self::code('php', $code);
    }

    /**
     * @param $type
     * @param $code
     *
     * @return string
     */
    public static function code($type, $code)
    {
        return "<$type><!-- ".trim($code)." --></$type>";
    }

    public static function __callStatic($method, $params)
    {
        return call_user_func_array(
                        array(self::$plugins, $method), $params
        );
    }

    protected static function dataSetupNode($node, $documentID)
    {
        // search are return if alredy exists
        foreach (self::$documents[$documentID]->dataNodes as $dataNode) {
            if ($node->isSameNode($dataNode)) {
                return $dataNode;
            }
        }
        // if doesn't, add it
        self::$documents[$documentID]->dataNodes[] = $node;

        return $node;
    }

    protected static function dataRemoveNode($node, $documentID)
    {
        // search are return if alredy exists
        foreach (self::$documents[$documentID]->dataNodes as $k => $dataNode) {
            if ($node->isSameNode($dataNode)) {
                unset(self::$documents[$documentID]->dataNodes[$k]);
                unset(self::$documents[$documentID]->data[$dataNode->dataID]);
            }
        }
    }

    public static function data($node, $name, $data, $documentID = null)
    {
        if (!$documentID) {
            // TODO check if this works
            $documentID = self::getDocumentID($node);
        }
        $document = self::$documents[$documentID];
        $node = self::dataSetupNode($node, $documentID);
        if (!isset($node->dataID)) {
            $node->dataID = ++self::$documents[$documentID]->uuid;
        }
        $id = $node->dataID;
        if (!isset($document->data[$id])) {
            $document->data[$id] = array();
        }
        if (!is_null($data)) {
            $document->data[$id][$name] = $data;
        }
        if ($name) {
            if (isset($document->data[$id][$name])) {
                return $document->data[$id][$name];
            }
        } else {
            return $id;
        }
    }

    public static function removeData($node, $name, $documentID)
    {
        if (!$documentID) {
            // TODO check if this works
            $documentID = self::getDocumentID($node);
        }
        $document = self::$documents[$documentID];
        $node = self::dataSetupNode($node, $documentID);
        $id = $node->dataID;
        if ($name) {
            if (isset($document->data[$id][$name])) {
                unset($document->data[$id][$name]);
            }
            $name = null;
            foreach ($document->data[$id] as $name) {
                break;
            }
            if (!$name) {
                self::removeData($node, $name, $documentID);
            }
        } else {
            self::dataRemoveNode($node, $documentID);
        }
    }
}

/**
 * Plugins static namespace class.
 *
 * @author Tobiasz Cudnik <tobiasz.cudnik/gmail.com>
 *
 * @todo move plugin methods here (as statics)
 */
class phpQueryPlugins
{
    public function __call($method, $args)
    {
        if (isset(phpQuery::$extendStaticMethods[$method])) {
            $return = call_user_func_array(
                    phpQuery::$extendStaticMethods[$method], $args
            );
        } elseif (isset(phpQuery::$pluginsStaticMethods[$method])) {
            $class = phpQuery::$pluginsStaticMethods[$method];
            $realClass = "phpQueryPlugin_$class";
            $return = call_user_func_array(
                    array($realClass, $method), $args
            );

            return isset($return) ? $return : $this;
        } else {
            throw new Exception("Method '{$method}' doesnt exist");
        }
    }
}

/**
 * Shortcut to phpQuery::pq($arg1, $context)
 * Chainable.
 *
 * @see phpQuery::pq()
 *
 * @return phpQueryObject|QueryTemplatesSource|QueryTemplatesParse|QueryTemplatesSourceQuery
 *
 * @author Tobiasz Cudnik <tobiasz.cudnik/gmail.com>
 */
function pq($arg1, $context = null)
{
    $args = func_get_args();

    return call_user_func_array(
                    array('phpQuery', 'pq'), $args
    );
}

// add plugins dir and Zend framework to include path
set_include_path(
        get_include_path()
        .PATH_SEPARATOR.dirname(__FILE__).'/phpQuery/'
        .PATH_SEPARATOR.dirname(__FILE__).'/phpQuery/plugins/'
);
// why ? no __call nor __get for statics in php...
// XXX __callStatic will be available in PHP 5.3
phpQuery::$plugins = new phpQueryPlugins();
