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/*
 * 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/
 * 
 * File Name: fckpanel_gecko.js
 *      FCKPanel Class: Creates and manages floating panels in Gecko Browsers.
 * 
 * File Authors:
 *              Frederico Caldeira Knabben (fredck@fckeditor.net)
 */

var FCKPanel = function( parentWindow )
{
        if ( parentWindow )
                this.Window = parentWindow ;
        else
        {
                this.Window = window ;

                while ( this.Window != window.top )
                {
                        // Try/Catch must be used to avoit an error when using a frameset
                        // on a different domain:
                        // "Permission denied to get property HTMLDocument.Body".
                        try
                        {
                                if ( this.Window.parent.document.body.tagName == 'FRAMESET' )
                                        break ;
                        }
                        catch (e)
                        {
                                break ;
                        }

                        this.Window = this.Window.parent ;
                }
        }
}

FCKPanel.prototype.Create = function()
{
        this._IFrame = this.Window.document.body.appendChild( this.Window.document.createElement('iframe') ) ;
        this._IFrame.src = 'about:blank' ;
    this._IFrame.frameBorder            = '0';
    this._IFrame.scrolling                      = 'no' ;
    this._IFrame.style.left                     = '0px' ;
        this._IFrame.style.top                  = '0px' ;
    this._IFrame.width                          = 10 ;
        this._IFrame.height                             = 10 ;
    this._IFrame.style.position         = 'absolute';
        this._IFrame.style.visibility   = 'hidden' ;

        this._IFrame.IsFCKPanel = true ;
        this._IFrame.Panel              = this ;

        this.Document = this._IFrame.contentWindow.document ;

        // Initialize the IFRAME document body.
        this.Document.open() ;
        this.Document.write( '<html><head></head><body><\/body><\/html>' ) ;
        this.Document.close() ;

        // Remove the default margins.
        this.Document.body.style.margin = this.Document.body.style.padding = '0px' ;

        // Add the defined Style Sheet to the document.
        if ( this.StyleSheet )
                FCKTools.AppendStyleSheet( this.Document, this.StyleSheet ) ;


        this.OuterDiv = this.Document.body.appendChild( this.Document.createElement('DIV') ) ;
        this.OuterDiv.style.cssFloat = 'left' ;

        this.PanelDiv = this.OuterDiv.appendChild( this.Document.createElement('DIV') ) ;
        this.PanelDiv.className = 'FCK_Panel' ;

        this.Created = true ;
}

FCKPanel.prototype.Show = function( panelX, panelY, relElement, width, height, autoSize  )
{
        if ( ! this.Created )
                this.Create() ;

        if ( width != null && autoSize && width < this.OuterDiv.offsetWidth )
                this.PanelDiv.style.width = width ;

        if ( height != null && autoSize && height < this.PanelDiv.offsetHeight )
                this.PanelDiv.style.height = height + 'px' ;

        var oPos = this.GetElementPosition( relElement ) ;

        panelX += oPos.X ;
        panelY += oPos.Y ;

        if ( panelX + this.OuterDiv.offsetWidth > this.Window.innerWidth )
        {
                // The following line aligns the panel to the other side of the refElement.
                // panelX = oPos.X - ( this.PanelDiv.offsetWidth - relElement.offsetWidth ) ;

                panelX -= panelX + this.OuterDiv.offsetWidth - this.Window.innerWidth ;
        }

        // Set the context menu DIV in the specified location.
        this._IFrame.style.left = panelX + 'px' ;
        this._IFrame.style.top  = panelY + 'px' ;

        // Watch the "OnClick" event for all windows to close the Context Menu.
        function SetOnClickListener( targetWindow, targetFunction )
        {
                // Try/Catch must be used to avoit an error when using a frameset
                // on a different domain:
                // "Permission denied to get property Window.frameElement".
                try
                {
                        if ( targetWindow == null || ( targetWindow.frameElement && targetWindow.frameElement.IsFCKPanel ) )
                                return ;

                        targetWindow.document.addEventListener( 'click', targetFunction, false ) ;
                }
                catch (e) {}

                for ( var i = 0 ; i < targetWindow.frames.length ; i++ )
                        SetOnClickListener( targetWindow.frames[i], targetFunction ) ;
        }
        SetOnClickListener( window.top, FCKPanelEventHandlers.OnDocumentClick ) ;

        this._IFrame.width      = this.OuterDiv.offsetWidth ;
        this._IFrame.height = this.OuterDiv.offsetHeight ;

        // Show it.
        this._IFrame.style.visibility = '' ;
}

FCKPanel.prototype.GetElementPosition = function( el )
{
        // Initializes the Coordinates object that will be returned by the function.
        var c = { X:0, Y:0 } ;

        // Loop throw the offset chain.
        while ( el )
        {
                c.X += el.offsetLeft ;
                c.Y += el.offsetTop ;

                if ( el.offsetParent == null && el.ownerDocument.defaultView != this.Window )
                        el = el.ownerDocument.defaultView.frameElement ;
                else
                        el = el.offsetParent ;
        }

        // Return the Coordinates object
        return c ;
}

FCKPanel.prototype.Hide = function()
{
        // There is a bug on Firefox over Mac. It doesn't hide the Panel
        // scrollbars, so we must force it.
        this.PanelDiv.style.overflow = 'visible' ;

        this._IFrame.style.visibility = 'hidden' ;
//      this._IFrame.style.left = this._IFrame.style.top = '0px' ;
}

var FCKPanelEventHandlers = new Object() ;

FCKPanelEventHandlers.OnDocumentClick = function( e )
{
        var oWindow = e.target.ownerDocument.defaultView ;

        if ( ! oWindow.IsFCKPanel )
        {
                function RemoveOnClickListener( targetWindow )
                {
                        if ( targetWindow == null )
                                return ;

                        // Try/Catch must be used to avoit an error when using a frameset
                        // on a different domain:
                        // "Permission denied to get property Window.frameElement".
                        try
                        {
                                if ( targetWindow.frameElement && targetWindow.frameElement.IsFCKPanel )
                                        targetWindow.frameElement.Panel.Hide() ;
                                else
                                        targetWindow.document.removeEventListener( 'click', FCKPanelEventHandlers.OnDocumentClick, false ) ;
                        }
                        catch (e) {}

                        for ( var i = 0 ; i < targetWindow.frames.length ; i++ )
                                RemoveOnClickListener( targetWindow.frames[i] ) ;
                }
                RemoveOnClickListener( window.top ) ;
        }
}