CrossReferenceTable.java

//
// Android PDF Writer
// http://coderesearchlabs.com/androidpdfwriter
//
// by Javier Santo Domingo (j-a-s-d@coderesearchlabs.com)
//

package totalcross.util.pdf;

import totalcross.sys.*;

public class CrossReferenceTable extends List
{

   private int mObjectNumberStart;

   public CrossReferenceTable()
   {
      super();
      clear();
   }

   public void setObjectNumberStart(int Value)
   {
      mObjectNumberStart = Value;
   }

   public int getObjectNumberStart()
   {
      return mObjectNumberStart;
   }

   private String getObjectsXRefInfo()
   {
      return renderList();
   }

   public void addObjectXRefInfo(int ByteOffset, int Generation, boolean InUse)
   {
      StringBuilder sb = new StringBuilder();
      sb.append(Convert.zeroPad(ByteOffset,10));
      sb.append(" ");
      sb.append(Convert.zeroPad(5, Generation));
      if (InUse)
      {
         sb.append(" n ");
      }
      else
      {
         sb.append(" f ");
      }
      sb.append("\r\n");
      mList.add(sb.toString());
   }

   private String render()
   {
      StringBuilder sb = new StringBuilder();
      sb.append("xref");
      sb.append("\r\n");
      sb.append(mObjectNumberStart);
      sb.append(" ");
      sb.append(mList.size());
      sb.append("\r\n");
      sb.append(getObjectsXRefInfo());
      return sb.toString();
   }

   public String toPDFString()
   {
      return render();
   }

   public void clear()
   {
      super.clear();
      addObjectXRefInfo(0, 65536, false); // free objects linked list head
      mObjectNumberStart = 0;
   }

}