<?php

/*

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

 * Copyright (C) 2003-2008 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 4.

 *

 * 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

     */

    var $InstanceName ;

    /**

     * Path to FCKeditor relative to the document root.

     *

     * @var string

     */

    var $BasePath ;

    /**

     * Width of the FCKeditor.

     * Examples: 100%, 600

     *

     * @var mixed

     */

    var $Width ;

    /**

     * Height of the FCKeditor.

     * Examples: 400, 50%

     *

     * @var mixed

     */

    var $Height ;

    /**

     * Name of the toolbar to load.

     *

     * @var string

     */

    var $ToolbarSet ;

    /**

     * Initial value.

     *

     * @var string

     */

    var $Value ;

    /**

     * This is where additional configuration can be passed.

     * Example:

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

     *

     * @var array

     */

    var $Config ;



    /**

     * Main Constructor.

     * Refer to the _samples/php directory for examples.

     *

     * @param string $instanceName

     */

    function FCKeditor( $instanceName )

    {

        $this->InstanceName    = $instanceName ;

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

        $this->Width        = '100%' ;

        $this->Height        = '200' ;

        $this->ToolbarSet    = 'Default' ;

        $this->Value        = '' ;



        $this->Config        = array() ;

    }



    /**

     * Display FCKeditor.

     *

     */

    function Create()

    {

        echo $this->CreateHtml() ;

    }



    /**

     * Return the HTML code required to run FCKeditor.

     *

     * @return string

     */

    function CreateHtml()

    {

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



        $Html = '' ;



        if ( !isset( $_GET ) ) {

            global $HTTP_GET_VARS ;

            $_GET = $HTTP_GET_VARS ;

        }



        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 != '' )

                $Link .= "&amp;Toolbar={$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

     */

    function IsCompatible()

    {

        return FCKeditor_IsCompatibleBrowser() ;

    }



    /**

     * Get settings from Config array as a single string.

     *

     * @access protected

     * @return string

     */

    function GetConfigFieldString()

    {

        $sParams = '' ;

        $bFirst = true ;



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

        {

            if ( $bFirst == false )

                $sParams .= '&amp;' ;

            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

     */

    function EncodeConfig( $valueToEncode )

    {

        $chars = array(

            '&' => '%26',

            '=' => '%3D',

            '"' => '%22' ) ;



        return strtr( $valueToEncode,  $chars ) ;

    }

}