Pdf full text search on iPad with Quartz 2D

Question

Hi guys :) I am trying to implement full text search using Quartz 2D but it's a nightmare. I can "extract" text from pdf page using PDF Operator (TJ and other...)

    CGPDFOperatorTableRef myTable;

myTable = CGPDFOperatorTableCreate();

CGPDFOperatorTableSetCallback (myTable, "BT", &op_BT);
CGPDFOperatorTableSetCallback (myTable, "Td", &op_Td);
CGPDFOperatorTableSetCallback (myTable, "TD", &op_TD);
CGPDFOperatorTableSetCallback (myTable, "Tm", &op_Tm);
CGPDFOperatorTableSetCallback (myTable, "T*", &op_T);
CGPDFOperatorTableSetCallback (myTable, "TJ", &op_TJ);
CGPDFOperatorTableSetCallback (myTable, "Tf", &op_TF);
CGPDFOperatorTableSetCallback (myTable, "ET", &op_ET);

But in the same time I need to highlight a match on PDF page with some rectangle like it's done in Safari for example. Any suggestions how to implement this? Is there some solutions that don't require to such immense work?