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<?php
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/**
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* TCallbackResponseAdapter and TCallbackResponseWriter class file.
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*
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* @author Wei Zhuo <weizhuo[at]gamil[dot]com>
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* @link http://www.pradosoft.com/
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* @copyright Copyright © 2005-2008 PradoSoft
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* @license http://www.pradosoft.com/license/
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* @version $Id: TCallbackResponseAdapter.php 2482 2008-07-30 02:07:13Z knut $
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* @package System.Web.UI.ActiveControls
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*/
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/**
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* TCallbackResponseAdapter alters the THttpResponse's outputs.
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*
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* A TCallbackResponseWriter is used instead of the TTextWrite when
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* createHtmlWriter is called. Each call to createHtmlWriter will create
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* a new TCallbackResponseWriter. When flushContent() is called each
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* instance of TCallbackResponseWriter's content is flushed.
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*
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* The callback response data can be set using the {@link setResponseData ResponseData}
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* property.
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*
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* @author Wei Zhuo <weizhuo[at]gmail[dot]com>
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* @version $Id: TCallbackResponseAdapter.php 2482 2008-07-30 02:07:13Z knut $
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* @package System.Web.UI.ActiveControls
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* @since 3.1
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*/
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class TCallbackResponseAdapter extends THttpResponseAdapter
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{
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/**
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* @TCallbackResponseWriter[] list of writers.
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*/
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private $_writers=array();
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/**
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* @mixed callback response data.
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*/
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private $_data;
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private $_redirectUrl=null;
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/**
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* Returns a new instance of THtmlWriter.
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* An instance of TCallbackResponseWriter is created to hold the content.
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* @param string writer class name.
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* @param THttpResponse http response handler.
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*/
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public function createNewHtmlWriter($type,$response)
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{
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$writer = new TCallbackResponseWriter();
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$this->_writers[] = $writer;
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return parent::createNewHtmlWriter($type,$writer);
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}
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/**
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* Flushes the contents in the writers.
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*/
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public function flushContent()
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{
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foreach($this->_writers as $writer)
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echo $writer->flush();
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parent::flushContent();
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}
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/**
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* @param mixed callback response data.
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*/
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public function setResponseData($data)
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{
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$this->_data = $data;
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}
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/**
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* @return mixed callback response data.
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*/
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public function getResponseData()
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{
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return $this->_data;
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}
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/**
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* Delay the redirect until we process the rest of the page.
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* @param string new url to redirect to.
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*/
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public function httpRedirect($url)
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{
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if($url[0]==='/')
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$url=$this->getRequest()->getBaseUrl().$url;
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$this->_redirectUrl=str_replace('&','&',$url);
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}
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/**
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* @return string new url for callback response to redirect to.
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*/
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public function getRedirectedUrl()
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{
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return $this->_redirectUrl;
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}
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}
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/**
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* TCallbackResponseWriter class.
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*
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* TCallbackResponseWriter class enclosed a chunck of content within a
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* html comment boundary. This allows multiple chuncks of content to return
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* in the callback response and update multiple HTML elements.
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*
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* The {@link setBoundary Boundary} property sets boundary identifier in the
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* HTML comment that forms the boundary. By default, the boundary identifier
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* is generated using microtime.
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*
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* @author Wei Zhuo <weizhuo[at]gmail[dot]com>
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* @version $Id: TCallbackResponseAdapter.php 2482 2008-07-30 02:07:13Z knut $
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* @package System.Web.UI.ActiveControls
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* @since 3.1
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*/
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class TCallbackResponseWriter extends TTextWriter
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{
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/**
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* @var string boundary ID
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*/
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private $_boundary;
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/**
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* Constructor. Generates unique boundary ID using microtime.
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*/
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public function __construct()
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{
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$this->_boundary = sprintf('%x',crc32(microtime()));
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}
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/**
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* @return string boundary identifier.
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*/
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public function getBoundary()
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{
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return $this->_boundary;
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}
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/**
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* @param string boundary identifier.
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*/
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public function setBoundary($value)
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{
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$this->_boundary = $value;
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}
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/**
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* Returns the text content wrapped within a HTML comment with boundary
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* identifier as its comment content.
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* @return string text content chunck.
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*/
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public function flush()
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{
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$content = '<!--'.$this->getBoundary().'-->';
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$content .= parent::flush();
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$content .= '<!--//'.$this->getBoundary().'-->';
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return $content;
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}
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}
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?>
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