Subversion-Projekte lars-tiefland.prado

<?php
/**
 * TMarkdown class file
 *
 * @author Wei Zhuo <weizhuo[at]gmail[dot]com>
 * @link http://www.pradosoft.com/
 * @copyright Copyright &copy; 2005-2008 PradoSoft
 * @license http://www.pradosoft.com/license/
 * @version $Id: TMarkdown.php 2541 2008-10-21 15:05:13Z qiang.xue $
 * @package System.Web.UI.WebControls
 */

/**
 * Using TTextHighlighter and MarkdownParser classes
 */
Prado::using('System.Web.UI.WebControls.TTextHighlighter');
Prado::using('System.3rdParty.Markdown.MarkdownParser');

/**
 * 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.
 *
 * TMarkdown also performs syntax highlighting for code blocks whose language
 * is recognized by {@link TTextHighlighter}.
 * The language of a code block must be specified in the first line of the block
 * and enclosed within a pair of square brackets (e.g. [php]).
 *
 * @author Wei Zhuo <weizhuo[at]gmail[dot]com>
 * @version $Id: TMarkdown.php 2541 2008-10-21 15:05:13Z qiang.xue $
 * @package System.Web.UI.WebControls
 * @since 3.0.1
 */
class TMarkdown extends TTextHighlighter
{
        /**
         * Processes a text string.
         * This method is required by the parent class.
         * @param string text string to be processed
         * @return string the processed text result
         */
        public function processText($text)
        {
                $renderer = new MarkdownParser;
                $result = $renderer->parse($text);
                return preg_replace_callback(
                                '/<pre><code>\[\s*(\w+)\s*\]\n+((.|\n)*?)\s*<\\/code><\\/pre>/im',
                                array($this, 'highlightCode'), $result);
        }

        /**
         * Highlights source code using TTextHighlighter
         * @param array matches of code blocks
         * @return string highlighted code.
         */
        protected function highlightCode($matches)
        {
                $text = html_entity_decode($matches[2],ENT_QUOTES,'UTF-8');
                $this->setLanguage($matches[1]);
                return parent::processText($text);
        }
}