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<?php
/**
* TTextHighlighter class file
*
* @author Wei Zhuo<weizhuo[at]gmail[dot]com>
* @link http://www.pradosoft.com/
* @copyright Copyright © 2005 Wei Zhuo
* @license http://www.pradosoft.com/license/
* @version $Revision: $ $Date: $
* @package System.Web.UI.WebControls
*/
/**
* Using GeSHi and TTextWriter classes
*/
Prado::using('System.3rdParty.geshi.geshi');
/**
* TTextHighlighter class.
*
* TTextHighlighter does syntax highlighting its body content, including
* static text and rendering results of child controls.
* You can set {@link setLanguage Language} to specify what kind of syntax
* the body content is. Currently, TTextHighlighter supports the following
* languages: 'php','prado','css','html','javascript' and 'xml', where 'prado'
* refers to PRADO template syntax. By setting {@link setShowLineNumbers ShowLineNumbers}
* to true, the highlighted result may be shown with line numbers.
*
* @author Wei Zhuo<weizhuo[at]gmail[dot]com>
* @version $Revision: $ $Date: $
* @package System.Web.UI.WebControls
* @since 3.0
*/
class TTextHighlighter extends TWebControl
{
/**
* @return string tag name of the panel
*/
protected function getTagName()
{
return 'div';
}
/**
* @return string language whose syntax is to be used for highlighting. Defaults to 'php'.
*/
public function getLanguage()
{
return $this->getViewState('Language', 'php');
}
/**
* @param string language whose syntax is to be used for highlighting.
* Valid values are those file names (without suffix) that are contained
* in '3rdParty/geshi/geshi' (e.g. 'php','prado','css','html','javascript',
* 'xml'.)
*/
public function setLanguage($value)
{
$this->setViewState('Language', $value, 'php');
}
/**
* @return boolean whether to show line numbers in the highlighted result.
*/
public function getShowLineNumbers()
{
return $this->getViewState('ShowLineNumbers', false);
}
/**
* @param boolean whether to show line numbers in the highlighted result.
*/
public function setShowLineNumbers($value)
{
$this->setViewState('ShowLineNumbers', TPropertyValue::ensureBoolean($value), false);
}
/**
* Registers css style for the highlighted result.
* This method overrides parent implementation.
* @param THtmlWriter writer
*/
protected function onPreRender($writer)
{
parent::onPreRender($writer);
$this->registerHighlightStyleSheet();
}
/**
* HTML-decodes static text.
* This method overrides parent implementation.
* @param mixed object to be added as body content
*/
public function addParsedObject($object)
{
if(is_string($object))
$object=html_entity_decode($object);
parent::addParsedObject($object);
}
/**
* Renders body content.
* This method overrides parent implementation by replacing
* the body content with syntax highlighted result.
* @param THtmlWriter writer
*/
protected function renderContents($writer)
{
$textWriter=new TTextWriter;
parent::renderContents(new THtmlWriter($textWriter));
$writer->write($this->highlightText($textWriter->flush()));
}
/**
* Register CSS style sheet file.
*/
protected function registerHighlightStyleSheet()
{
$cs = $this->getPage()->getClientScript();
$cssKey='prado:TTextHighlighter';
if(!$cs->isStyleSheetFileRegistered($cssKey))
{
$cssFile=Prado::getPathOfNamespace('System.3rdParty.geshi.highlight','.css');
$styleSheet = $this->getService()->getAsset($cssFile);
$cs->registerStyleSheetFile($cssKey, $styleSheet);
}
}
/**
* Returns the highlighted text.
* @param string text to highlight.
* @return string highlighted text.
*/
protected function highlightText($text)
{
$geshi = new GeSHi(trim($text), $this->getLanguage());
if($this->getShowLineNumbers())
$geshi->enable_line_numbers(GESHI_NORMAL_LINE_NUMBERS);
$geshi->enable_classes();
return $geshi->parse_code();
}
}
?>
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