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   1  <?php
   2  /**
   3   * TMarkdown class file
   4   *
   5   * @author Wei Zhuo <weizhuo[at]gmail[dot]com>
   6   * @link http://www.pradosoft.com/
   7   * @copyright Copyright &copy; 2005 PradoSoft
   8   * @license http://www.pradosoft.com/license/
   9   * @version $Id: TMarkdown.php 1397 2006-09-07 07:55:53Z wei $
  10   * @package System.Web.UI.WebControls
  11   */
  12  
  13  /**
  14   * Using TTextHighlighter and MarkdownParser classes
  15   */
  16  Prado::using('System.Web.UI.WebControls.TTextHighlighter');
  17  Prado::using('System.3rdParty.Markdown.MarkdownParser');
  18  
  19  /**
  20   * TMarkdown class
  21   *
  22   * TMarkdown is a control that produces HTML from code with markdown syntax.
  23   *
  24   * Markdown is a text-to-HTML conversion tool for web writers. Markdown allows
  25   * you to write using an easy-to-read, easy-to-write plain text format, then
  26   * convert it to structurally valid XHTML (or HTML).
  27   * Further documentation regarding Markdown can be found at
  28   * http://daringfireball.net/projects/markdown/
  29   *
  30   * To use TMarkdown, simply enclose the content to be rendered within
  31   * the body of TMarkdown in a template.
  32   *
  33   * See http://www.pradosoft.com/demos/quickstart/?page=Markdown for
  34   * details on the Markdown syntax usage.
  35   *
  36   * TMarkdown also performs syntax highlighting for code blocks whose language
  37   * is recognized by {@link TTextHighlighter}.
  38   * The language of a code block must be specified in the first line of the block
  39   * and enclosed within a pair of square brackets (e.g. [php]).
  40   *
  41   * @author Wei Zhuo <weizhuo[at]gmail[dot]com>
  42   * @version $Id: TMarkdown.php 1397 2006-09-07 07:55:53Z wei $
  43   * @package System.Web.UI.WebControls
  44   * @since 3.0.1
  45   */
  46  class TMarkdown extends TTextHighlighter
  47  {
  48      /**
  49       * Processes a text string.
  50       * This method is required by the parent class.
  51       * @param string text string to be processed
  52       * @return string the processed text result
  53       */
  54  	public function processText($text)
  55      {
  56          $renderer = new MarkdownParser;
  57          $result = $renderer->parse($text);
  58          return preg_replace_callback(
  59                  '/<pre><code>\[\s*(\w+)\s*\]\n+((.|\n)*?)\s*<\\/code><\\/pre>/im',
  60                  array($this, 'highlightCode'), $result);
  61      }
  62  
  63      /**
  64       * Highlights source code using TTextHighlighter
  65       * @param array matches of code blocks
  66       * @return string highlighted code.
  67       */
  68  	protected function highlightCode($matches)
  69      {
  70          $geshi=new GeSHi(html_entity_decode($matches[2],ENT_QUOTES,'UTF-8'), $matches[1]);
  71          if($this->getShowLineNumbers())
  72              $geshi->enable_line_numbers(GESHI_NORMAL_LINE_NUMBERS);
  73          $geshi->enable_classes();
  74          if($this->getEnableCopyCode())
  75              $geshi->set_header_content($this->getHeaderTemplate());
  76  
  77          return $geshi->parse_code();
  78      }
  79  }
  80  
  81  ?>