/*
 * FCKeditor - The text editor for internet
 * Copyright (C) 2003-2005 Frederico Caldeira Knabben
 * 
 * Licensed under the terms of the GNU Lesser General Public License:
 * 		http://www.opensource.org/licenses/lgpl-license.php
 * 
 * For further information visit:
 * 		http://www.fckeditor.net/
 * 
 * "Support Open Source software. What about a donation today?"
 * 
 * File Name: fckeditor.js
 * 	This is the integration file for JavaScript.
 * 
 * 	It defines the FCKeditor class that can be used to create editor
 * 	instances in a HTML page in the client side. For server side
 * 	operations, use the specific integration system.
 * 
 * File Authors:
 * 		Frederico Caldeira Knabben (fredck@fckeditor.net)
 */

// FCKeditor Class
var FCKeditor = function(instanceName, width, height, toolbarSet, value)
{
    // Properties
    this.InstanceName = instanceName;
    this.Width = width || '100%';
    this.Height = height || '200';
    this.ToolbarSet = toolbarSet || 'Default';
    this.Value = value || '';
    this.BasePath = '/fckeditor/';
    this.CheckBrowser = true;
    this.DisplayErrors = true;
    this.EnableSafari = true;
    // This is a temporary property, while Safari support is under development.
    this.EnableOpera = true;
    // This is a temporary property, while Opera support is under development.

    this.Config = new Object();

    // Events
    this.OnError = null;
    // function( source, errorNumber, errorDescription )
}

FCKeditor.prototype.http_request = false;

FCKeditor.prototype.dynValue = function(url) {

    this.http_request = false;

    if (window.XMLHttpRequest) { // Mozilla, Safari,...
        this.http_request = new XMLHttpRequest();
        if (this.http_request.overrideMimeType) {
            this.http_request.overrideMimeType('text/html');
            // zu dieser Zeile siehe weiter unten
        }
    } else if (window.ActiveXObject) { // IE
        try {
            this.http_request = new ActiveXObject("Msxml2.XMLHTTP");
        } catch (e) {
            try {
                this.http_request = new ActiveXObject("Microsoft.XMLHTTP");
            } catch (e) {
            }
        }
    }

    if (!this.http_request) {
        alert('Ende :( Kann keine XMLHTTP-Instanz erzeugen');
        return false;
    }
    this.http_request.onreadystatechange = this.Create2;
    this.http_request.open('GET', url, true);
    this.http_request.send(null);
}

FCKeditor.prototype.Create2 = function()
{
    if (this.http_request.readyState == 4) {
        if (this.http_request.status == 200) {
            this.Value = this.http_request.responseText;
            this.Create();
        } else {
            alert('Bei dem Request ist ein Problem aufgetreten.');
        }
    }
}


FCKeditor.prototype.Create = function()
{
    // Check for errors
    if (!this.InstanceName || this.InstanceName.length == 0)
    {
        this._ThrowError(701, 'You must specify an instance name.');
        return;
    }

    document.write('<div>');

    if (!this.CheckBrowser || this._IsCompatibleBrowser())
    {
        document.write('<input type="hidden" id="' + this.InstanceName + '" name="' + this.InstanceName + '" value="' + this._HTMLEncode(this.Value) + '" style="display:none" />');
        document.write(this._GetConfigHtml());
        document.write(this._GetIFrameHtml());
    }
    else
    {
        var sWidth = this.Width.toString().indexOf('%') > 0 ? this.Width  : this.Width + 'px' ;
        var sHeight = this.Height.toString().indexOf('%') > 0 ? this.Height : this.Height + 'px' ;
        document.write('<textarea name="' + this.InstanceName + '" rows="4" cols="40" style="WIDTH: ' + sWidth + '; HEIGHT: ' + sHeight + '">' + this._HTMLEncode(this.Value) + '<\/textarea>');
    }

    document.write('</div>');
}

FCKeditor.prototype.ReplaceTextarea = function()
{
    if (!this.CheckBrowser || this._IsCompatibleBrowser())
    {
        // We must check the elements firstly using the Id and then the name.
        var oTextarea = document.getElementById(this.InstanceName) ;
        var colElementsByName = document.getElementsByName(this.InstanceName) ;
        var i = 0;
        while (oTextarea || i == 0)
        {
            if (oTextarea && oTextarea.tagName == 'TEXTAREA')
                break;
            oTextarea = colElementsByName[i++];
        }

        if (!oTextarea)
        {
            alert('Error: The TEXTAREA with id or name set to "' + this.InstanceName + '" was not found');
            return;
        }

        oTextarea.style.display = 'none';
        oTextarea.value = this.Value;
        this._InsertHtmlBefore(this._GetConfigHtml(), oTextarea);
        this._InsertHtmlBefore(this._GetIFrameHtml(), oTextarea);
    }
}

FCKeditor.prototype._InsertHtmlBefore = function(html, element)
{
    if (element.insertAdjacentHTML)    // IE
        element.insertAdjacentHTML('beforeBegin', html);
    else                                // Gecko
    {
        var oRange = document.createRange() ;
        oRange.setStartBefore(element);
        var oFragment = oRange.createContextualFragment(html);
        element.parentNode.insertBefore(oFragment, element);
    }
}

FCKeditor.prototype._GetConfigHtml = function()
{
    var sConfig = '' ;
    for (var o in this.Config)
    {
        if (sConfig.length > 0) sConfig += '&amp;';
        sConfig += escape(o) + '=' + escape(this.Config[o]);
    }

    return '<input type="hidden" id="' + this.InstanceName + '___Config" value="' + sConfig + '" style="display:none" />';
}

FCKeditor.prototype._GetIFrameHtml = function()
{
    var sFile = (/fcksource=true/i).test(window.top.location.search) ? 'fckeditor.original.html' : 'fckeditor.html' ;

    var sLink = this.BasePath + 'editor/' + sFile + '?InstanceName=' + this.InstanceName ;
    if (this.ToolbarSet) sLink += '&Toolbar=' + this.ToolbarSet;

    return '<iframe id="' + this.InstanceName + '___Frame" src="' + sLink + '" width="' + this.Width + '" height="' + this.Height + '" frameborder="no" scrolling="no"></iframe>';
}

FCKeditor.prototype._IsCompatibleBrowser = function()
{
    var sAgent = navigator.userAgent.toLowerCase() ;

    // Internet Explorer
    if (sAgent.indexOf("msie") != -1 && sAgent.indexOf("mac") == -1 && sAgent.indexOf("opera") == -1)
    {
        var sBrowserVersion = navigator.appVersion.match(/MSIE (.\..)/)[1] ;
        return ( sBrowserVersion >= 5.5 );
    }

    // Gecko
    if (navigator.product == "Gecko" && navigator.productSub >= 20030210)
        return true;

    // Opera
    if (this.EnableOpera)
    {
        var aMatch = sAgent.match(/^opera\/(\d+\.\d+)/) ;
        if (aMatch && aMatch[1] >= 9.0)
            return true;
    }

    // Safari
    if (this.EnableSafari && sAgent.indexOf('safari') != -1)
        return ( sAgent.match(/safari\/(\d+)/)[1] >= 312 );    // Build must be at least 312 (1.3)

    return false;
}

FCKeditor.prototype._ThrowError = function(errorNumber, errorDescription)
{
    this.ErrorNumber = errorNumber;
    this.ErrorDescription = errorDescription;

    if (this.DisplayErrors)
    {
        document.write('<div style="COLOR: #ff0000">');
        document.write('[ FCKeditor Error ' + this.ErrorNumber + ': ' + this.ErrorDescription + ' ]');
        document.write('</div>');
    }

    if (typeof( this.OnError ) == 'function')
        this.OnError(this, errorNumber, errorDescription);
}

FCKeditor.prototype._HTMLEncode = function(text)
{
    if (typeof( text ) != "string")
        text = text.toString();

    text = text.replace(/&/g, "&amp;");
    text = text.replace(/"/g, "&quot;");
    text = text.replace(/</g, "&lt;");
    text = text.replace(/>/g, "&gt;");
    text = text.replace(/'/g, "&#39;");

    return text;
}