mxPrintPreview.prototype.open=function(a,b,c,d){var e=this.graph.cellRenderer.initializeOverlay,f=null;try{this.printOverlays&&(this.graph.cellRenderer.initializeOverlay=function(E,G){G.init(E.view.getDrawPane())});this.printControls&&(this.graph.cellRenderer.initControl=function(E,G,H,I){G.dialect=E.view.graph.dialect;G.init(E.view.getDrawPane())});this.wnd=null!=b?b:this.wnd;var g=!1;null==this.wnd&&(g=!0,this.wnd=window.open());var k=this.wnd.document;if(g){var l=this.getDoctype();null!=l&&0<l.length&&