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/*
 * FCKeditor - The text editor for internet
 * Copyright (C) 2003-2006 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: fck_1_ie.js
 *      This is the first part of the "FCK" object creation. This is the main
 *      object that represents an editor instance.
 *      (IE specific implementations)
 * 
 * File Authors:
 *              Frederico Caldeira Knabben (fredck@fckeditor.net)
 */

FCK.Description = "FCKeditor for Internet Explorer 5.5+" ;

FCK._GetBehaviorsStyle = function()
{
        if ( !FCK._BehaviorsStyle )
        {
                var sBasePath = FCKConfig.FullBasePath ;
                var sTableBehavior = '' ;
                var sStyle ;
                
                // The behaviors should be pointed using the FullBasePath to avoid security
                // errors when using a differente BaseHref.
                sStyle =
                        '<style type="text/css" _fcktemp="true">' +
                        'INPUT { behavior: url(' + sBasePath + 'css/behaviors/hiddenfield.htc) ; }' ;

                if ( FCKConfig.ShowBorders )
                        sTableBehavior = 'url(' + sBasePath + 'css/behaviors/showtableborders.htc)' ;

                // Disable resize handlers.
                sStyle += 'INPUT,TEXTAREA,SELECT,.FCK__Anchor,.FCK__PageBreak' ;

                if ( FCKConfig.DisableObjectResizing )
                {
                        sStyle += ',IMG' ;
                        sTableBehavior += ' url(' + sBasePath + 'css/behaviors/disablehandles.htc)' ;
                }
                
                sStyle += ' { behavior: url(' + sBasePath + 'css/behaviors/disablehandles.htc) ; }' ;

                if ( sTableBehavior.length > 0 )
                        sStyle += 'TABLE { behavior: ' + sTableBehavior + ' ; }' ;

                sStyle += '</style>' ;
                FCK._BehaviorsStyle = sStyle ;
        }
        
        return FCK._BehaviorsStyle ;
}

function Doc_OnMouseUp()
{
        if ( FCK.EditorWindow.event.srcElement.tagName == 'HTML' )
        {
                FCK.Focus() ;
                FCK.EditorWindow.event.cancelBubble     = true ;
                FCK.EditorWindow.event.returnValue      = false ;
        }
}

function Doc_OnPaste()
{
        if ( FCK.Status == FCK_STATUS_COMPLETE )
                FCK.Events.FireEvent( "OnPaste" ) ;

        return false ;
}

/*
function Doc_OnContextMenu()
{
        var e = FCK.EditorWindow.event ;
        
        FCK.ShowContextMenu( e.screenX, e.screenY ) ;
        return false ;
}
*/

function Doc_OnKeyDown()
{
        var e = FCK.EditorWindow.event ;


        switch ( e.keyCode )
        {
                case 13 :       // ENTER
                        if ( FCKConfig.UseBROnCarriageReturn && !(e.ctrlKey || e.altKey || e.shiftKey) )
                        {
                                Doc_OnKeyDownUndo() ;
                                
                                // We must ignore it if we are inside a List.
                                if ( FCK.EditorDocument.queryCommandState( 'InsertOrderedList' ) || FCK.EditorDocument.queryCommandState( 'InsertUnorderedList' ) )
                                        return true ;

                                // Insert the <BR> (The &nbsp; must be also inserted to make it work)
                                FCK.InsertHtml( '<br>&nbsp;' ) ;

                                // Remove the &nbsp;
                                var oRange = FCK.EditorDocument.selection.createRange() ;
                                oRange.moveStart( 'character', -1 ) ;
                                oRange.select() ;
                                FCK.EditorDocument.selection.clear() ;

                                return false ;
                        }
                        break ;
                
                case 8 :        // BACKSPACE
                        // We must delete a control selection by code and cancels the 
                        // keystroke, otherwise IE will execute the browser's "back" button.
                        if ( FCKSelection.GetType() == 'Control' )
                        {
                                FCKSelection.Delete() ;
                                return false ;
                        }
                        break ;
                
                case 9 :        // TAB
                        if ( FCKConfig.TabSpaces > 0 && !(e.ctrlKey || e.altKey || e.shiftKey) )
                        {
                                Doc_OnKeyDownUndo() ;
                                
                                FCK.InsertHtml( window.FCKTabHTML ) ;
                                return false ;
                        }
                        break ;
                case 90 :       // Z
                        if ( e.ctrlKey && !(e.altKey || e.shiftKey) )
                        {
                                FCKUndo.Undo() ;
                                return false ;
                        }
                        break ;
                case 89 :       // Y
                        if ( e.ctrlKey && !(e.altKey || e.shiftKey) )
                        {
                                FCKUndo.Redo() ;
                                return false ;
                        }
                        break ;
        }
        
        if ( !( e.keyCode >=16 && e.keyCode <= 18 ) )
                Doc_OnKeyDownUndo() ;
        return true ;
}

function Doc_OnKeyDownUndo()
{
        if ( !FCKUndo.Typing )
        {
                FCKUndo.SaveUndoStep() ;
                FCKUndo.Typing = true ;
                FCK.Events.FireEvent( "OnSelectionChange" ) ;
        }
        
        FCKUndo.TypesCount++ ;

        if ( FCKUndo.TypesCount > FCKUndo.MaxTypes )
        {
                FCKUndo.TypesCount = 0 ;
                FCKUndo.SaveUndoStep() ;
        }
}

function Doc_OnDblClick()
{
        FCK.OnDoubleClick( FCK.EditorWindow.event.srcElement ) ;
        FCK.EditorWindow.event.cancelBubble = true ;
}

function Doc_OnSelectionChange()
{
        FCK.Events.FireEvent( "OnSelectionChange" ) ;
}

FCK.InitializeBehaviors = function( dontReturn )
{
        // Set the focus to the editable area when clicking in the document area.
        // TODO: The cursor must be positioned at the end.
        this.EditorDocument.attachEvent( 'onmouseup', Doc_OnMouseUp ) ;

        // Intercept pasting operations
        this.EditorDocument.body.attachEvent( 'onpaste', Doc_OnPaste ) ;

        // Reset the context menu.
        FCK.ContextMenu._InnerContextMenu.AttachToElement( FCK.EditorDocument.body ) ;

        // Build the "TAB" key replacement (if necessary).
        if ( FCKConfig.TabSpaces > 0 )
        {
                window.FCKTabHTML = '' ;
                for ( i = 0 ; i < FCKConfig.TabSpaces ; i++ )
                        window.FCKTabHTML += "&nbsp;" ;
        }
        this.EditorDocument.attachEvent("onkeydown", Doc_OnKeyDown ) ;

        this.EditorDocument.attachEvent("ondblclick", Doc_OnDblClick ) ;

        // Catch cursor movements
        this.EditorDocument.attachEvent("onselectionchange", Doc_OnSelectionChange ) ;

        //Enable editing
//      this.EditorDocument.body.contentEditable = true ;
}

FCK.InsertHtml = function( html )
{
        html = FCKConfig.ProtectedSource.Protect( html ) ;
        html = FCK.ProtectUrls( html ) ;

        FCK.Focus() ;

        FCKUndo.SaveUndoStep() ;

        // Gets the actual selection.
        var oSel = FCK.EditorDocument.selection ;

        // Deletes the actual selection contents.
        if ( oSel.type.toLowerCase() == 'control' )
                oSel.clear() ;

        // Insert the HTML.
        oSel.createRange().pasteHTML( html ) ;
        
        FCKDocumentProcessor.Process( FCK.EditorDocument ) ;
}

FCK.SetInnerHtml = function( html )             // IE Only
{
        var oDoc = FCK.EditorDocument ;
        // Using the following trick, any comment in the begining of the HTML will
        // be preserved.
        oDoc.body.innerHTML = '<div id="__fakeFCKRemove__">&nbsp;</div>' + html ;
        oDoc.getElementById('__fakeFCKRemove__').removeNode( true ) ;
}

var FCK_PreloadImages_Count = 0 ;
var FCK_PreloadImages_Images = new Array() ;

function FCK_PreloadImages()
{
        // Get the images to preload.
        var aImages = FCKConfig.PreloadImages || [] ;
        
        if ( typeof( aImages ) == 'string' )
                aImages = aImages.split( ';' ) ;

        // Add the skin icons strip.
        aImages.push( FCKConfig.SkinPath + 'fck_strip.gif' ) ;
        
        FCK_PreloadImages_Count = aImages.length ;

        var aImageElements = new Array() ;
        
        for ( var i = 0 ; i < aImages.length ; i++ )
        {
                var eImg = document.createElement( 'img' ) ;
                eImg.onload = eImg.onerror = FCK_PreloadImages_OnImage ;
                eImg.src = aImages[i] ;
                
                FCK_PreloadImages_Images[i] = eImg ;
        }
}

function FCK_PreloadImages_OnImage()
{
        if ( (--FCK_PreloadImages_Count) == 0 )
                FCKTools.RunFunction( LoadToolbarSetup ) ;
}

// Disable the context menu in the editor (outside the editing area).
function Document_OnContextMenu()
{
        return ( event.srcElement._FCKShowContextMenu == true ) ;
}
document.oncontextmenu = Document_OnContextMenu ;

function FCK_Cleanup()
{
        this.EditorWindow = null ;
        this.EditorDocument = null ;
}