Html to PDF using canvas and jsPdf

 var doc = new $window.jsPDF("p", "mm", "a4");
      $timeout(function(){
        $window.html2canvas( $document[0].getElementsByClassName('print-pass'), {
          onrendered: function(canvas){
            var imgData = canvas.toDataURL('image/png');            
            //Page size in mm
            var pageHeight = 295;  
            var imgWidth = 210; 
            var imgHeight = canvas.height * imgWidth / canvas.width;
            var heightLeft = imgHeight;
            var position = 0;

            doc.addImage(imgData, 'PNG', 0, position, imgWidth, imgHeight);
            heightLeft -= pageHeight;

            while (heightLeft >= 0) {
              position = heightLeft - imgHeight;
              doc.addPage();
              doc.addImage(imgData, 'PNG', 0, position, imgWidth, imgHeight);
              heightLeft -= pageHeight; 
            }

            doc.autoPrint();
            doc.output('dataurlnewwindow');
            //doc.save( booking.bookingRef + '.pdf');
          }
        });
      }, 1000);

Unable to resolve $window and $timeout funtions.
Any help will be appreciated.