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<?php

/*

 * FCKeditor - The text editor for Internet - http://www.fckeditor.net

 * Copyright (C) 2003-2009 Frederico Caldeira Knabben

 *

 * == BEGIN LICENSE ==

 *

 * Licensed under the terms of any of the following licenses at your

 * choice:

 *

 *  - GNU General Public License Version 2 or later (the "GPL")

 *    http://www.gnu.org/licenses/gpl.html

 *

 *  - GNU Lesser General Public License Version 2.1 or later (the "LGPL")

 *    http://www.gnu.org/licenses/lgpl.html

 *

 *  - Mozilla Public License Version 1.1 or later (the "MPL")

 *    http://www.mozilla.org/MPL/MPL-1.1.html

 *

 * == END LICENSE ==

 *

 * This is the integration file for PHP 5.

 *

 * It defines the FCKeditor class that can be used to create editor

 * instances in PHP pages on server side.

 */

/**

 * Check if browser is compatible with FCKeditor.

 * Return true if is compatible.

 *

 * @return boolean

 */

function FCKeditor_IsCompatibleBrowser()

{

	if ( isset( $_SERVER ) ) {

		$sAgent = $_SERVER['HTTP_USER_AGENT'] ;

	}

	else {

		global $HTTP_SERVER_VARS ;

		if ( isset( $HTTP_SERVER_VARS ) ) {

			$sAgent = $HTTP_SERVER_VARS['HTTP_USER_AGENT'] ;

		}

		else {

			global $HTTP_USER_AGENT ;

			$sAgent = $HTTP_USER_AGENT ;

		}

	}

	if ( strpos($sAgent, 'MSIE') !== false && strpos($sAgent, 'mac') === false && strpos($sAgent, 'Opera') === false )

	{

		$iVersion = (float)substr($sAgent, strpos($sAgent, 'MSIE') + 5, 3) ;

		return ($iVersion >= 5.5) ;

	}

	else if ( strpos($sAgent, 'Gecko/') !== false )

	{

		$iVersion = (int)substr($sAgent, strpos($sAgent, 'Gecko/') + 6, 8) ;

		return ($iVersion >= 20030210) ;

	}

	else if ( strpos($sAgent, 'Opera/') !== false )

	{

		$fVersion = (float)substr($sAgent, strpos($sAgent, 'Opera/') + 6, 4) ;

		return ($fVersion >= 9.5) ;

	}

	else if ( preg_match( "|AppleWebKit/(\d+)|i", $sAgent, $matches ) )

	{

		$iVersion = $matches[1] ;

		return ( $matches[1] >= 522 ) ;

	}

	else

		return false ;

}

class FCKeditor

{

	/**

	 * Name of the FCKeditor instance.

	 *

	 * @access protected

	 * @var string

	 */

	public $InstanceName ;

	/**

	 * Path to FCKeditor relative to the document root.

	 *

	 * @var string

	 */

	public $BasePath ;

	/**

	 * Width of the FCKeditor.

	 * Examples: 100%, 600

	 *

	 * @var mixed

	 */

	public $Width ;

	/**

	 * Height of the FCKeditor.

	 * Examples: 400, 50%

	 *

	 * @var mixed

	 */

	public $Height ;

	/**

	 * Name of the toolbar to load.

	 *

	 * @var string

	 */

	public $ToolbarSet ;

	/**

	 * Initial value.

	 *

	 * @var string

	 */

	public $Value ;

	/**

	 * This is where additional configuration can be passed.

	 * Example:

	 * $oFCKeditor->Config['EnterMode'] = 'br';

	 *

	 * @var array

	 */

	public $Config ;

	/**

	 * Main Constructor.

	 * Refer to the _samples/php directory for examples.

	 *

	 * @param string $instanceName

	 */

	public function __construct( $instanceName )

 	{

		$this->InstanceName	= $instanceName ;

		$this->BasePath		= '/fckeditor/' ;

		$this->Width		= '100%' ;

		$this->Height		= '200' ;

		$this->ToolbarSet	= 'Default' ;

		$this->Value		= '' ;

		$this->Config		= array() ;

	}

	/**

	 * Display FCKeditor.

	 *

	 */

	public function Create()

	{

		echo $this->CreateHtml() ;

	}

	/**

	 * Return the HTML code required to run FCKeditor.

	 *

	 * @return string

	 */

	public function CreateHtml()

	{

		$HtmlValue = htmlspecialchars( $this->Value ) ;

		$Html = '' ;

		if ( $this->IsCompatible() )

		{

			if ( isset( $_GET['fcksource'] ) && $_GET['fcksource'] == "true" )

				$File = 'fckeditor.original.html' ;

			else

				$File = 'fckeditor.html' ;

			$Link = "{$this->BasePath}editor/{$File}?InstanceName={$this->InstanceName}" ;

			if ( $this->ToolbarSet != '' )

				$Link .= "&Toolbar={$this->ToolbarSet}" ;

			// Render the linked hidden field.

			$Html .= "<input type=\"hidden\" id=\"{$this->InstanceName}\" name=\"{$this->InstanceName}\" value=\"{$HtmlValue}\" style=\"display:none\" />" ;

			// Render the configurations hidden field.

			$Html .= "<input type=\"hidden\" id=\"{$this->InstanceName}___Config\" value=\"" . $this->GetConfigFieldString() . "\" style=\"display:none\" />" ;

			// Render the editor IFRAME.

			$Html .= "<iframe id=\"{$this->InstanceName}___Frame\" src=\"{$Link}\" width=\"{$this->Width}\" height=\"{$this->Height}\" frameborder=\"0\" scrolling=\"no\"></iframe>" ;

		}

		else

		{

			if ( strpos( $this->Width, '%' ) === false )

				$WidthCSS = $this->Width . 'px' ;

			else

				$WidthCSS = $this->Width ;

			if ( strpos( $this->Height, '%' ) === false )

				$HeightCSS = $this->Height . 'px' ;

			else

				$HeightCSS = $this->Height ;

			$Html .= "<textarea name=\"{$this->InstanceName}\" rows=\"4\" cols=\"40\" style=\"width: {$WidthCSS}; height: {$HeightCSS}\">{$HtmlValue}</textarea>" ;

		}

		return $Html ;

	}

	/**

	 * Returns true if browser is compatible with FCKeditor.

	 *

	 * @return boolean

	 */

	public function IsCompatible()

	{

		return FCKeditor_IsCompatibleBrowser() ;

	}

	/**

	 * Get settings from Config array as a single string.

	 *

	 * @access protected

	 * @return string

	 */

	public function GetConfigFieldString()

	{

		$sParams = '' ;

		$bFirst = true ;

		foreach ( $this->Config as $sKey => $sValue )

		{

			if ( $bFirst == false )

				$sParams .= '&' ;

			else

				$bFirst = false ;

			if ( $sValue === true )

				$sParams .= $this->EncodeConfig( $sKey ) . '=true' ;

			else if ( $sValue === false )

				$sParams .= $this->EncodeConfig( $sKey ) . '=false' ;

			else

				$sParams .= $this->EncodeConfig( $sKey ) . '=' . $this->EncodeConfig( $sValue ) ;

		}

		return $sParams ;

	}

	/**

	 * Encode characters that may break the configuration string

	 * generated by GetConfigFieldString().

	 *

	 * @access protected

	 * @param string $valueToEncode

	 * @return string

	 */

	public function EncodeConfig( $valueToEncode )

	{

		$chars = array(

			'&' => '%26',

			'=' => '%3D',

			'"' => '%22' ) ;

		return strtr( $valueToEncode,  $chars ) ;

	}

}