Preventing copy-paste all the rich text editor in SharePoint

As part of an accessible Web sites in SharePoint, this time I will present the code prevents the copy-paste. The following code prevents copy-paste content editor rich text field /* ECM */ function disablePasteForRTE() { Type.registerNamespace( "RTE" ); if (RTE) { if (RTE.RichTextEditor != null ) { RTE.RichTextEditor.paste = function () { RTE.Cursor.paste( true ); } RTE.Cursor.$3C_0 = true ; } } } if (_spBodyOnLoadFunctionNames != null ) { _spBodyOnLoadFunctionNames.push( 'disablePasteForRTE'...