import java.io.*;
import com.lowagie.text.pdf.*;
import com.lowagie.text.*;
import java.util.*;



public class DConvert {
    public static void main(String[] args) {
	if (args.length == 2) 
	    (new DConvert()).go(args[0],args[1]);
	else 
	    System.out.printf("usage: java DConvert input-file output-file\n");
    }

    public void go(String infile,String outfile) {
	HashMap bookmarks;   // Raw bookmarks
	Map<Integer,java.util.List<Destination>> 
	    parsed;      // Parsed bookmarks

        try {

	    // Open existing PDF and read in the destinations into a HashMap
            PdfReader reader = new PdfReader(infile);
	    reader.consolidateNamedDestinations();
	    bookmarks = SimpleNamedDestination.getNamedDestination(reader,false);
	    parsed = convertToDestinations(bookmarks);
            int n = reader.getNumberOfPages();

	    // Set up new document
            Rectangle psize = reader.getPageSize(1);
            float width = psize.height();
            float height = psize.width();            
            Document document = new Document(new Rectangle(height,width));
            PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(outfile));
            document.open();
            PdfContentByte cb = writer.getDirectContent();

	    // Iterate through pages
            int i = 0;
            while (i < n) {
                document.newPage();
                i++;
                PdfImportedPage page1 = writer.getImportedPage(reader, i);
		cb.addTemplate(page1,1,1);
		System.out.print("\rProcessing Page "+i);		

		// Check if this page has a bookmark
		if (parsed.containsKey(i)) { 
		    java.util.List<Destination> marklist = parsed.get(i);

		    // Insert the destination, changing spaces to underscores in the process
		    for (Destination d : marklist) {
			cb.localDestination(d.getName().replace(' ','_'),d.getPdfDestination());
		    }
		}
            }
            document.close();
	    System.out.println("\r"+i+" pages processed.\n");
        }
        catch (Exception de) {
            de.printStackTrace();
        }
    }

    /*
      Converts Hashmap of Raw Destinations to
      a Hashmap of <Iteger : pagenumber, java.util.List<list of Destinations on that page>>

      See below for the Destination class

    */

    private Map<Integer,java.util.List<Destination>>
	convertToDestinations(HashMap map) {
	HashMap<Integer,java.util.List<Destination>> outmap = new HashMap<Integer,java.util.List<Destination>>();

	Iterator it = map.keySet().iterator();

	while(it.hasNext()) {
	String key = (String)it.next(); 	    
	    Destination d = new Destination(key,(String)map.get(key));
	    if (outmap.containsKey(d.getPage())) {
		java.util.List<Destination> l = (java.util.List<Destination>)outmap.get(d.getPage());
		l.add(d);
	    } else {
		java.util.List<Destination> l = new ArrayList<Destination>();
		l.add((Destination)d);
		outmap.put(d.getPage(),l);
	    }
	}
	return outmap;
    }

}


/*
Raw Destinations look like in the HashMap
Para1 <---> 39 XYZ 0 539 1.5

where Para1 = name of destination
39 = Page number
XYZ = type
0 = x-coordinate
539 = y-coordinate
1.5 = zoom factor

This needs to be parsed into a different form where all 
Destinations on a page can be accessed in one shot.

The Destination class is a convenience class that
holds the following information for each Destination
* Page number
* Type
* Name
* PdfDestination object

*/


class Destination {
    int page;
    String type,name;
    PdfDestination dest;	

    // Arguments: "Para_1.1", "52 XYZ -83 726 1.25"
    public Destination(String destname,String parameters) {
	float x,y,z;

	type = "XYZ";
	name = new String(destname);
	StringTokenizer st = new StringTokenizer(parameters);

	page = Integer.parseInt(st.nextToken());
	    
	st.nextToken();  // Ignore type--is XYZ for all records
	x = Float.parseFloat(st.nextToken());
	if (x < 0.0) x = (float)0.0; //Location to the left of margin is set to margin

	y = Float.parseFloat(st.nextToken());
	z = Float.parseFloat(st.nextToken());
	    
	dest = new PdfDestination(PdfDestination.XYZ, x,y,z);
    }

    public int getPage() { return page; }
	
    public PdfDestination getPdfDestination() { return dest; }

    public String getName() { return name; }

    public String toString() {
	return "Page: "+page+", Name:"+name+", type: "+type+", dest:"+dest;
    }
}