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<?php
/**
* TMarkdown class file
*
* @author Wei Zhuo <weizhuo[at]gmail[dot]com>
* @link http://www.pradosoft.com/
* @copyright Copyright © 2005 PradoSoft
* @license http://www.pradosoft.com/license/
* @version $Revision: $ $Date: $
* @package System.Web.UI.WebControls
*/
/**
* TMarkdown class
*
* TMarkdown is a control that produces HTML from code with markdown syntax.
*
* Markdown is a text-to-HTML conversion tool for web writers. Markdown allows
* you to write using an easy-to-read, easy-to-write plain text format, then
* convert it to structurally valid XHTML (or HTML).
* Further documentation regarding Markdown can be found at
* http://daringfireball.net/projects/markdown/
*
* To use TMarkdown, simply enclose the content to be rendered within
* the body of TMarkdown in a template.
*
* See http://www.pradosoft.com/demos/quickstart/?page=Markdown for
* details on the Markdown syntax usage.
*
* @author Wei Zhuo <weizhuo[at]gmail[dot]com>
* @version $Revision: $ $Date: $
* @package System.Web.UI.WebControls
* @since 3.0
*/
class TMarkdown extends TControl
{
/**
* @var TTextHighlighter
*/
private $_highlighter;
/**
* Renders body content.
* This method overrides parent implementation by removing
* malicious javascript code from the body content
* @param THtmlWriter writer
*/
public function render($writer)
{
$textWriter=new TTextWriter;
parent::render(new THtmlWriter($textWriter));
$writer->write($this->renderMarkdown($textWriter->flush()));
}
/**
* Use MarkdownParser to render the HTML content.
* @param string markdown content
* @return string HTML content
*/
protected function renderMarkdown($text)
{
$renderer = Prado::createComponent('System.3rdParty.Markdown.MarkdownParser');
$result = $renderer->parse($text);
return preg_replace_callback(
'/<pre><code>\[\s*(\w+)\s*\]\n+((.|\n)*?)\s*<\\/code><\\/pre>/im',
array($this, 'highlightCode'), $result);
}
/**
* @return TTextHighlighter source code highlighter
*/
public function getTextHighlighter()
{
if(is_null($this->_highlighter))
$this->_highlighter = new TTextHighlighter;
return $this->_highlighter;
}
/**
* Highlights source code using TTextHighlighter
* @param array matches of code blocks
* @return string highlighted code.
*/
protected function highlightCode($matches)
{
$text = new TTextWriter;
$writer = new THtmlWriter($text);
$hi = $this->getTextHighlighter();
if($hi->getControls()->getCount() > 0)
$hi->getControls()->removeAt(0);
$hi->addParsedObject(html_entity_decode($matches[2]));
$hi->setLanguage($matches[1]);
$hi->render($writer);
return $text->flush();
}
/**
* Registers css style for the highlighted result.
* This method overrides parent implementation.
* @param THtmlWriter writer
*/
public function onPreRender($writer)
{
parent::onPreRender($writer);
$hi = $this->getTextHighlighter();
$this->getControls()->insertAt(0,$hi);
$hi->onPreRender($writer);
$this->getControls()->removeAt(0);
}
}
?>
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