Subversion-Projekte lars-tiefland.prado

<?php
/**
 * TCallbackResponseAdapter and TCallbackResponseWriter class file.
 *
 * @author Wei Zhuo <weizhuo[at]gamil[dot]com>
 * @link http://www.pradosoft.com/
 * @copyright Copyright &copy; 2005-2008 PradoSoft
 * @license http://www.pradosoft.com/license/
 * @version $Id: TCallbackResponseAdapter.php 2482 2008-07-30 02:07:13Z knut $
 * @package System.Web.UI.ActiveControls
 */

/**
 * TCallbackResponseAdapter alters the THttpResponse's outputs.
 *
 * A TCallbackResponseWriter is used instead of the TTextWrite when
 * createHtmlWriter is called. Each call to createHtmlWriter will create
 * a new TCallbackResponseWriter. When flushContent() is called each
 * instance of TCallbackResponseWriter's content is flushed.
 *
 * The callback response data can be set using the {@link setResponseData ResponseData}
 * property.
 *
 * @author Wei Zhuo <weizhuo[at]gmail[dot]com>
 * @version $Id: TCallbackResponseAdapter.php 2482 2008-07-30 02:07:13Z knut $
 * @package System.Web.UI.ActiveControls
 * @since 3.1
 */
class TCallbackResponseAdapter extends THttpResponseAdapter
{
        /**
         * @TCallbackResponseWriter[] list of writers.
         */
        private $_writers=array();
        /**
         * @mixed callback response data.
         */
        private $_data;

        private $_redirectUrl=null;

        /**
         * Returns a new instance of THtmlWriter.
         * An instance of TCallbackResponseWriter is created to hold the content.
         * @param string writer class name.
         * @param THttpResponse http response handler.
         */
        public function createNewHtmlWriter($type,$response)
        {
                $writer = new TCallbackResponseWriter();
                $this->_writers[] = $writer;
                return parent::createNewHtmlWriter($type,$writer);
        }

        /**
         * Flushes the contents in the writers.
         */
        public function flushContent()
        {
                foreach($this->_writers as $writer)
                        echo $writer->flush();
                parent::flushContent();
        }

        /**
         * @param mixed callback response data.
         */
        public function setResponseData($data)
        {
                $this->_data = $data;
        }

        /**
         * @return mixed callback response data.
         */
        public function getResponseData()
        {
                return $this->_data;
        }

        /**
         * Delay the redirect until we process the rest of the page.
         * @param string new url to redirect to.
         */
        public function httpRedirect($url)
        {
                if($url[0]==='/')
                        $url=$this->getRequest()->getBaseUrl().$url;
                $this->_redirectUrl=str_replace('&amp;','&',$url);
        }

        /**
         * @return string new url for callback response to redirect to.
         */
        public function getRedirectedUrl()
        {
                return $this->_redirectUrl;
        }
}

/**
 * TCallbackResponseWriter class.
 *
 * TCallbackResponseWriter class enclosed a chunck of content within a
 * html comment boundary. This allows multiple chuncks of content to return
 * in the callback response and update multiple HTML elements.
 *
 * The {@link setBoundary Boundary} property sets boundary identifier in the
 * HTML comment that forms the boundary. By default, the boundary identifier
 * is generated using microtime.
 *
 * @author Wei Zhuo <weizhuo[at]gmail[dot]com>
 * @version $Id: TCallbackResponseAdapter.php 2482 2008-07-30 02:07:13Z knut $
 * @package System.Web.UI.ActiveControls
 * @since 3.1
 */
class TCallbackResponseWriter extends TTextWriter
{
        /**
         * @var string boundary ID
         */
        private $_boundary;

        /**
         * Constructor. Generates unique boundary ID using microtime.
         */
        public function __construct()
        {
                $this->_boundary = sprintf('%x',crc32(microtime()));
        }

        /**
         * @return string boundary identifier.
         */
        public function getBoundary()
        {
                return $this->_boundary;
        }

        /**
         * @param string boundary identifier.
         */
        public function setBoundary($value)
        {
                $this->_boundary = $value;
        }

        /**
         * Returns the text content wrapped within a HTML comment with boundary
         * identifier as its comment content.
         * @return string text content chunck.
         */
        public function flush()
        {
                $content = '<!--'.$this->getBoundary().'-->';
                $content .= parent::flush();
                $content .= '<!--//'.$this->getBoundary().'-->';
                return $content;
        }
}

?>