Adding byte offsets to the XREF Table tab. Adding ObjStm to the treeview. RES-713

Author: michaeldemey

src/main/java/com/itextpdf/rups/controller/PdfReaderController.java

@@ -44,7 +44,9 @@ This file is part of the iText (R) project.
 
 import com.itextpdf.kernel.pdf.PdfArray;
 import com.itextpdf.kernel.pdf.PdfDictionary;
+import com.itextpdf.kernel.pdf.PdfIndirectReference;
 import com.itextpdf.kernel.pdf.PdfName;
+import com.itextpdf.kernel.pdf.PdfNull;
 import com.itextpdf.kernel.pdf.PdfObject;
 import com.itextpdf.kernel.pdf.PdfStream;
 import com.itextpdf.kernel.utils.CompareTool;
@@ -61,6 +63,7 @@ This file is part of the iText (R) project.
 import com.itextpdf.rups.event.OpenStructureEvent;
 import com.itextpdf.rups.event.RupsEvent;
 import com.itextpdf.rups.io.listeners.PdfTreeNavigationListener;
+import com.itextpdf.rups.model.IndirectObjectFactory;
 import com.itextpdf.rups.model.ObjectLoader;
 import com.itextpdf.rups.model.PdfSyntaxParser;
 import com.itextpdf.rups.model.TreeNodeFactory;
@@ -79,11 +82,13 @@ This file is part of the iText (R) project.
 import com.itextpdf.rups.view.itext.StructureTree;
 import com.itextpdf.rups.view.itext.SyntaxHighlightedStreamPane;
 import com.itextpdf.rups.view.itext.XRefTable;
+import com.itextpdf.rups.view.itext.treenodes.ObjectStreamTreeNode;
 import com.itextpdf.rups.view.itext.treenodes.PdfObjectTreeNode;
 import com.itextpdf.rups.view.itext.treenodes.PdfTrailerTreeNode;
 
 import java.awt.Color;
 import java.awt.event.KeyListener;
+import java.util.List;
 import java.util.Observable;
 import java.util.Observer;
 import java.util.Stack;
@@ -310,6 +315,13 @@ public void update(Observable observable, Object obj) {
                     root.setTrailer(loader.getFile().getPdfDocument().getTrailer());
                     root.setUserObject(String.format(Language.PDF_OBJECT_TREE.getString(), loader.getLoaderName()));
                     nodes.expandNode(root);
+                    IndirectObjectFactory objects = loader.getObjects();
+                    List<PdfIndirectReference> objectStreams = objects.getObjectStreams();
+                    if ( objectStreams != null && objectStreams.size() > 0 ) {
+                        ObjectStreamTreeNode objStreamNode = new ObjectStreamTreeNode(new PdfArray(objectStreams));
+                        root.add(objStreamNode);
+                        nodes.expandNode(objStreamNode);
+                    }
                     navigationTabs.setSelectedIndex(0);
                     setChanged();
                     super.notifyObservers(event);

src/main/java/com/itextpdf/rups/model/IndirectObjectFactory.java

@@ -46,15 +46,18 @@ This file is part of the iText (R) project.
 import com.itextpdf.kernel.exceptions.PdfException;
 import com.itextpdf.kernel.pdf.PdfDictionary;
 import com.itextpdf.kernel.pdf.PdfDocument;
+import com.itextpdf.kernel.pdf.PdfIndirectReference;
 import com.itextpdf.kernel.pdf.PdfName;
 import com.itextpdf.kernel.pdf.PdfNull;
 import com.itextpdf.kernel.pdf.PdfObject;
+import com.itextpdf.kernel.pdf.PdfStream;
 import com.itextpdf.rups.view.Language;
 
 import java.lang.reflect.Field;
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 import java.util.ArrayList;
+import java.util.List;
 
 /**
  * A factory that can produce all the indirect objects in a PDF file.
@@ -77,6 +80,11 @@ public class IndirectObjectFactory {
      * A list of all the indirect objects in a PDF file.
      */
     protected ArrayList<PdfObject> objects = new ArrayList<>();
+
+    /**
+     * List of all Object Streams in a PDF file.
+     */
+    protected List<PdfIndirectReference> objectStreams = new ArrayList<>();
     /**
      * Mapping between the index in the objects list and the reference number in the xref table.
      */
@@ -161,6 +169,14 @@ public boolean storeNextObject() {
                 final int idx = size();
                 idxToRef.put(idx, current);
                 refToIdx.put(current, idx);
+
+                if ( object.getType() == PdfObject.STREAM ) {
+                    PdfStream stream = (PdfStream) object;
+                    if ( PdfName.ObjStm.equals(stream.get(PdfName.Type) )) {
+                        this.objectStreams.add(stream.getIndirectReference());
+                    }
+                }
+
                 store(object);
                 return true;
             }
@@ -254,6 +270,10 @@ public boolean isLoadedByReference(int ref) {
         return isLoaded.get(getIndexByRef(ref));
     }
 
+    public List<PdfIndirectReference> getObjectStreams() {
+        return objectStreams;
+    }
+
     /**
      * Loads an object based on its reference number in the xref table.
      *

src/main/java/com/itextpdf/rups/model/ObjectLoader.java

@@ -117,6 +117,7 @@ public TreeNodeFactory getNodes() {
         return nodes;
     }
 
+
     /**
      * getter for a human readable name representing this loader
      *

src/main/java/com/itextpdf/rups/view/itext/treenodes/ObjectStreamTreeNode.java

@@ -0,0 +1,12 @@
+package com.itextpdf.rups.view.itext.treenodes;
+
+import com.itextpdf.kernel.pdf.PdfObject;
+
+public class ObjectStreamTreeNode extends PdfObjectTreeNode {
+
+    public ObjectStreamTreeNode(PdfObject object) {
+        super(object);
+        setUserObject("PDF Object Streams");
+    }
+
+}