source: extensions/FCKEditor/editor/_source/internals/fck_ie.js @ 3295

/*
 * 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 ==
 *
 * Creation and initialization of the "FCK" object. This is the main
 * object that represents an editor instance.
 * (IE specific implementations)
 */

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

FCK._GetBehaviorsStyle = function()
{
        if ( !FCK._BehaviorsStyle )
        {
                var sBasePath = FCKConfig.BasePath ;
                var sTableBehavior = '' ;
                var sStyle ;

                // The behaviors should be pointed using the BasePath to avoid security
                // errors when using a different BaseHref.
                sStyle = '<style type="text/css" _fcktemp="true">' ;

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

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

                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()
{
        var body = FCK.EditorDocument.body ;

        body.detachEvent( 'onpaste', Doc_OnPaste ) ;

        var ret = FCK.Paste( !FCKConfig.ForcePasteAsPlainText && !FCKConfig.AutoDetectPasteFromWord ) ;

        body.attachEvent( 'onpaste', Doc_OnPaste ) ;

        return ret ;
}

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

function Doc_OnSelectionChange()
{
        // Don't fire the event if no document is loaded.
        if ( !FCK.IsSelectionChangeLocked && FCK.EditorDocument )
                FCK.Events.FireEvent( "OnSelectionChange" ) ;
}

function Doc_OnDrop()
{
        if ( FCK.MouseDownFlag )
        {
                FCK.MouseDownFlag = false ;
                return ;
        }

        if ( FCKConfig.ForcePasteAsPlainText )
        {
                var evt = FCK.EditorWindow.event ;

                if ( FCK._CheckIsPastingEnabled() || FCKConfig.ShowDropDialog )
                        FCK.PasteAsPlainText( evt.dataTransfer.getData( 'Text' ) ) ;

                evt.returnValue = false ;
                evt.cancelBubble = true ;
        }
}

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 ) ;

        // Intercept drop operations
        this.EditorDocument.body.attachEvent( 'ondrop', Doc_OnDrop ) ;

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

        this.EditorDocument.attachEvent("onkeydown", FCK._KeyDownListener ) ;

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

        this.EditorDocument.attachEvent("onbeforedeactivate", function(){ FCKSelection.Save() ; } ) ;

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

        FCKTools.AddEventListener( FCK.EditorDocument, 'mousedown', Doc_OnMouseDown ) ;
}

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

//      FCK.Focus() ;
        FCKSelection.Restore() ;
        FCK.EditorWindow.focus() ;

        FCKUndo.SaveUndoStep() ;

        // Gets the actual selection.
        var oSel = FCKSelection.GetSelection() ;

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

        // Using the following trick, any comment in the beginning of the HTML will
        // be preserved.
        html = '<span id="__fakeFCKRemove__" style="display:none;">fakeFCKRemove</span>' + html ;

        // Insert the HTML.
        oSel.createRange().pasteHTML( html ) ;

        // Remove the fake node
        FCK.EditorDocument.getElementById('__fakeFCKRemove__').removeNode( true ) ;

        FCKDocumentProcessor.Process( FCK.EditorDocument ) ;

        // For some strange reason the SaveUndoStep() call doesn't activate the undo button at the first InsertHtml() call.
        this.Events.FireEvent( "OnSelectionChange" ) ;
}

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

function FCK_PreloadImages()
{
        var oPreloader = new FCKImagePreloader() ;

        // Add the configured images.
        oPreloader.AddImages( FCKConfig.PreloadImages ) ;

        // Add the skin icons strip.
        oPreloader.AddImages( FCKConfig.SkinPath + 'fck_strip.gif' ) ;

        oPreloader.OnComplete = LoadToolbarSetup ;
        oPreloader.Start() ;
}

// 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.LinkedField = null ;
        this.EditorWindow = null ;
        this.EditorDocument = null ;
}

FCK._ExecPaste = function()
{
        // As we call ExecuteNamedCommand('Paste'), it would enter in a loop. So, let's use a semaphore.
        if ( FCK._PasteIsRunning )
                return true ;

        if ( FCKConfig.ForcePasteAsPlainText )
        {
                FCK.PasteAsPlainText() ;
                return false ;
        }

        var sHTML = FCK._CheckIsPastingEnabled( true ) ;

        if ( sHTML === false )
                FCKTools.RunFunction( FCKDialog.OpenDialog, FCKDialog, ['FCKDialog_Paste', FCKLang.Paste, 'dialog/fck_paste.html', 400, 330, 'Security'] ) ;
        else
        {
                if ( FCKConfig.AutoDetectPasteFromWord && sHTML.length > 0 )
                {
                        var re = /<\w[^>]*(( class="?MsoNormal"?)|(="mso-))/gi ;
                        if ( re.test( sHTML ) )
                        {
                                if ( confirm( FCKLang.PasteWordConfirm ) )
                                {
                                        FCK.PasteFromWord() ;
                                        return false ;
                                }
                        }
                }

                // Instead of inserting the retrieved HTML, let's leave the OS work for us,
                // by calling FCK.ExecuteNamedCommand( 'Paste' ). It could give better results.

                // Enable the semaphore to avoid a loop.
                FCK._PasteIsRunning = true ;

                FCK.ExecuteNamedCommand( 'Paste' ) ;

                // Removes the semaphore.
                delete FCK._PasteIsRunning ;
        }

        // Let's always make a custom implementation (return false), otherwise
        // the new Keyboard Handler may conflict with this code, and the CTRL+V code
        // could result in a simple "V" being pasted.
        return false ;
}

FCK.PasteAsPlainText = function( forceText )
{
        if ( !FCK._CheckIsPastingEnabled() )
        {
                FCKDialog.OpenDialog( 'FCKDialog_Paste', FCKLang.PasteAsText, 'dialog/fck_paste.html', 400, 330, 'PlainText' ) ;
                return ;
        }

        // Get the data available in the clipboard in text format.
        var sText = null ;
        if ( ! forceText )
                sText = clipboardData.getData("Text") ;
        else
                sText = forceText ;

        if ( sText && sText.length > 0 )
        {
                // Replace the carriage returns with <BR>
                sText = FCKTools.HTMLEncode( sText ) ;
                sText = FCKTools.ProcessLineBreaks( window, FCKConfig, sText ) ;

                var closeTagIndex = sText.search( '</p>' ) ;
                var startTagIndex = sText.search( '<p>' ) ;

                if ( ( closeTagIndex != -1 && startTagIndex != -1 && closeTagIndex < startTagIndex )
                                || ( closeTagIndex != -1 && startTagIndex == -1 ) )
                {
                        var prefix = sText.substr( 0, closeTagIndex ) ;
                        sText = sText.substr( closeTagIndex + 4 ) ;
                        this.InsertHtml( prefix ) ;
                }

                // Insert the resulting data in the editor.
                FCKUndo.SaveLocked = true ;
                this.InsertHtml( sText ) ;
                FCKUndo.SaveLocked = false ;
        }
}

FCK._CheckIsPastingEnabled = function( returnContents )
{
        // The following seams to be the only reliable way to check is script
        // pasting operations are enabled in the security settings of IE6 and IE7.
        // It adds a little bit of overhead to the check, but so far that's the
        // only way, mainly because of IE7.

        FCK._PasteIsEnabled = false ;

        document.body.attachEvent( 'onpaste', FCK_CheckPasting_Listener ) ;

        // The execCommand in GetClipboardHTML will fire the "onpaste", only if the
        // security settings are enabled.
        var oReturn = FCK.GetClipboardHTML() ;

        document.body.detachEvent( 'onpaste', FCK_CheckPasting_Listener ) ;

        if ( FCK._PasteIsEnabled )
        {
                if ( !returnContents )
                        oReturn = true ;
        }
        else
                oReturn = false ;

        delete FCK._PasteIsEnabled ;

        return oReturn ;
}

function FCK_CheckPasting_Listener()
{
        FCK._PasteIsEnabled = true ;
}

FCK.GetClipboardHTML = function()
{
        var oDiv = document.getElementById( '___FCKHiddenDiv' ) ;

        if ( !oDiv )
        {
                oDiv = document.createElement( 'DIV' ) ;
                oDiv.id = '___FCKHiddenDiv' ;

                var oDivStyle = oDiv.style ;
                oDivStyle.position              = 'absolute' ;
                oDivStyle.visibility    = oDivStyle.overflow    = 'hidden' ;
                oDivStyle.width                 = oDivStyle.height              = 1 ;

                document.body.appendChild( oDiv ) ;
        }

        oDiv.innerHTML = '' ;

        var oTextRange = document.body.createTextRange() ;
        oTextRange.moveToElementText( oDiv ) ;
        oTextRange.execCommand( 'Paste' ) ;

        var sData = oDiv.innerHTML ;
        oDiv.innerHTML = '' ;

        return sData ;
}

FCK.CreateLink = function( url, noUndo )
{
        // Creates the array that will be returned. It contains one or more created links (see #220).
        var aCreatedLinks = new Array() ;

        // Remove any existing link in the selection.
        FCK.ExecuteNamedCommand( 'Unlink', null, false, !!noUndo ) ;

        if ( url.length > 0 )
        {
                // If there are several images, and you try to link each one, all the images get inside the link:
                // <img><img> -> <a><img></a><img> -> <a><img><img></a> due to the call to 'CreateLink' (bug in IE)
                if (FCKSelection.GetType() == 'Control')
                {
                        // Create a link
                        var oLink = this.EditorDocument.createElement( 'A' ) ;
                        oLink.href = url ;

                        // Get the selected object
                        var oControl = FCKSelection.GetSelectedElement() ;
                        // Put the link just before the object
                        oControl.parentNode.insertBefore(oLink, oControl) ;
                        // Move the object inside the link
                        oControl.parentNode.removeChild( oControl ) ;
                        oLink.appendChild( oControl ) ;

                        return [ oLink ] ;
                }

                // Generate a temporary name for the link.
                var sTempUrl = 'javascript:void(0);/*' + ( new Date().getTime() ) + '*/' ;

                // Use the internal "CreateLink" command to create the link.
                FCK.ExecuteNamedCommand( 'CreateLink', sTempUrl, false, !!noUndo ) ;

                // Look for the just create link.
                var oLinks = this.EditorDocument.links ;

                for ( i = 0 ; i < oLinks.length ; i++ )
                {
                        var oLink = oLinks[i] ;

                        // Check it this a newly created link.
                        // getAttribute must be used. oLink.url may cause problems with IE7 (#555).
                        if ( oLink.getAttribute( 'href', 2 ) == sTempUrl )
                        {
                                var sInnerHtml = oLink.innerHTML ;      // Save the innerHTML (IE changes it if it is like an URL).
                                oLink.href = url ;
                                oLink.innerHTML = sInnerHtml ;          // Restore the innerHTML.

                                // If the last child is a <br> move it outside the link or it
                                // will be too easy to select this link again #388.
                                var oLastChild = oLink.lastChild ;
                                if ( oLastChild && oLastChild.nodeName == 'BR' )
                                {
                                        // Move the BR after the link.
                                        FCKDomTools.InsertAfterNode( oLink, oLink.removeChild( oLastChild ) ) ;
                                }

                                aCreatedLinks.push( oLink ) ;
                        }
                }
        }

        return aCreatedLinks ;
}

function _FCK_RemoveDisabledAtt()
{
        this.removeAttribute( 'disabled' ) ;
}

function Doc_OnMouseDown( evt )
{
        var e = evt.srcElement ;

        // Radio buttons and checkboxes should not be allowed to be triggered in IE
        // in editable mode. Otherwise the whole browser window may be locked by
        // the buttons. (#1782)
        if ( e.nodeName.IEquals( 'input' ) && e.type.IEquals( ['radio', 'checkbox'] ) && !e.disabled )
        {
                e.disabled = true ;
                FCKTools.SetTimeout( _FCK_RemoveDisabledAtt, 1, e ) ;
        }
}