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<?php
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/**
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 * TJavascriptLogger class file.
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 *
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 * @author Wei Zhuo <weizhuo[at]gmail[dot]com>
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 * @link http://www.pradosoft.com/
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 * @copyright Copyright &copy; 2005-2008 PradoSoft
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 * @license http://www.pradosoft.com/license/
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 * @version $Id: TJavascriptLogger.php 2541 2008-10-21 15:05:13Z qiang.xue $
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 * @package System.Web.UI.WebControls
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 */
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/**
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 * TJavascriptLogger class.
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 *
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 * Provides logging for client-side javascript. Example: template code
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 * <code><com:TJavascriptLogger /></code>
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 *
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 * Client-side javascript code to log info, error, warn, debug
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 * <code>Logger.warn('A warning');
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 * Logger.info('something happend');
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 * </code>
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 *
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 * To see the logger and console, press ALT-D (or CTRL-D on OS X).
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 * More information on the logger can be found at
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 * http://gleepglop.com/javascripts/logger/
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 *
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 * @author Wei Zhuo<weizhuo[at]gmail[dot]com>
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 * @version $Id: TJavascriptLogger.php 2541 2008-10-21 15:05:13Z qiang.xue $
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 * @package System.Web.UI.WebControls
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 * @since 3.0
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 */
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class TJavascriptLogger extends TWebControl
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{
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	private static $_keyCodes = array(
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		'0'=>48, '1'=>49, '2'=>50, '3'=>51, '4'=>52, '5'=>53, '6'=>54, '7'=>55, '8'=>56, '9'=>57,
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		'a'=>65, 'b'=>66, 'c'=>67, 'd'=>68, 'e'=>69, 'f'=>70, 'g'=>71, 'h'=>72,
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		'i'=>73, 'j'=>74, 'k'=>75, 'l'=>76, 'm'=>77, 'n'=>78, 'o'=>79, 'p'=>80,
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		'q'=>81, 'r'=>82, 's'=>83, 't'=>84, 'u'=>85, 'v'=>86, 'w'=>87, 'x'=>88, 'y'=>89, 'z'=>90);
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	/**
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	 * @return string tag name of the panel
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	 */
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	protected function getTagName()
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	{
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		return 'div';
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	}
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	/**
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	 * @param string keyboard key for toggling the console, default is J.
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	 */
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	public function setToggleKey($value)
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	{
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		$this->setViewState('ToggleKey', $value, 'j');
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	}
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	/**
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	 * @return string keyboard key for toggling the console.
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	 */
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	public function getToggleKey()
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	{
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		return $this->getViewState('ToggleKey', 'j');
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	}
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	/**
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	 * Registers the required logger javascript.
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	 * @param TEventParameter event parameter
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	 */
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	public function onPreRender($param)
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	{
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		$key = strtolower($this->getToggleKey());
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		$code = isset(self::$_keyCodes[$key]) ? self::$_keyCodes[$key] : 74;
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		$js = "var logConsole; Event.OnLoad(function() { logConsole = new LogConsole($code)}); ";
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		$cs = $this->getPage()->getClientScript();
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		$cs->registerBeginScript($this->getClientID(),$js);
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		$cs->registerPradoScript('logger');
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	}
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	/**
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	 * Register the required javascript libraries and
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	 * display some general usage information.
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	 * @param THtmlWriter the writer used for the rendering purpose
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	 */
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	public function renderContents($writer)
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	{
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		$code = strtoupper($this->getToggleKey());
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		$info = '(<a href="http://gleepglop.com/javascripts/logger/" target="_blank">more info</a>).';
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		$link = '<a href="javascript:if(logConsole)logConsole.toggle()">toggle the javascript log console.</a>';
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		$usage = 'Press ALT-'.$code.' (Or CTRL-'.$code.' on OS X) to';
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		$writer->write("{$usage} {$link} {$info}");
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	}
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}
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