1 files changed, 22 insertions, 5 deletions
diff --git a/src/main/java/at/knowcenter/wag/egov/egiz/pdf/StructContentHelper.java b/src/main/java/at/knowcenter/wag/egov/egiz/pdf/StructContentHelper.java
index 55e77e0..b15b3d6 100644
--- a/src/main/java/at/knowcenter/wag/egov/egiz/pdf/StructContentHelper.java
+++ b/src/main/java/at/knowcenter/wag/egov/egiz/pdf/StructContentHelper.java
@@ -16,7 +16,6 @@ import com.lowagie.text.pdf.PdfNumber;
 import com.lowagie.text.pdf.PdfObject;
 import com.lowagie.text.pdf.PdfStamper;
 import com.lowagie.text.pdf.PdfStamperImp;
-import com.lowagie.text.pdf.PdfString;
 
 /**
  * Helper class for writing the structure hierarchy of the signature elements.
@@ -28,6 +27,8 @@ import com.lowagie.text.pdf.PdfString;
  * 
  */
 public class StructContentHelper {
+   private static final PdfName PARENTTREENEXTKEY = new PdfName("ParentTreeNextKey");
+
    private static final String ALT_TEXT_DEFAULT = "PDF-AS Signatur";
 
    private static Logger logger = Logger.getLogger(StructContentHelper.class);
@@ -85,7 +86,14 @@ public class StructContentHelper {
          }
 
          if (strucParNr == null) { // no StructParents entry yet, make new one
-            parentTreeNextKey = root.getAsNumber(new PdfName("ParentTreeNextKey")); // read next proposed key
+            parentTreeNextKey = root.getAsNumber(PARENTTREENEXTKEY); // read next proposed key
+            if (parentTreeNextKey == null) { // this can be null if a non-perfect pdf creator was at work
+               // find the next key by counting
+               int nextI = ((int) parentTreeNums.size() / 2);               
+               this.parentTreeNextKey = new PdfNumber(nextI);
+               root.put(PARENTTREENEXTKEY, this.parentTreeNextKey);               
+            }
+            
             parentTreeKey = new PdfNumber(parentTreeNextKey.intValue());
             parentTreeNextKey.increment();
             page.put(PdfName.STRUCTPARENTS, parentTreeKey); // write /StructParents entry to page
@@ -101,9 +109,18 @@ public class StructContentHelper {
 
          } else {
             parentTreeKey = strucParNr;
+            parentTreeNextKey = root.getAsNumber(PARENTTREENEXTKEY); // read next proposed key
+            if (parentTreeNextKey == null) { // this can be null if a non-perfact pdf creator was at work
+               // find the next key by counting
+               int nextI = 0;
+               if (parentTreeNums != null) {
+                  nextI = ((int) parentTreeNums.size() / 2);
+               }
+               this.parentTreeNextKey = new PdfNumber(nextI);
+               root.put(PARENTTREENEXTKEY, this.parentTreeNextKey);               
+            }            
          }
 
-
          // find my structParentEntry
          if (numsIdx < 0) {
             // it's a weird data structure: "number tree", see pdf reference if you really want to understand
@@ -143,7 +160,7 @@ public class StructContentHelper {
          newStruct.put(PdfName.TYPE, new PdfName("StructElem"));
 
          newStruct.put(PdfName.PG, page.getIndRef());
-         newStruct.put(PdfName.ALT, new PdfString(getAltText(so.getSignatureTypeDefinition().getType())));
+        // newStruct.put(PdfName.ALT, new PdfString(getAltText(so.getSignatureTypeDefinition().getType())));
          newStruct.put(PdfName.K, new PdfNumber(nextMcid));
 
 
@@ -201,7 +218,7 @@ public class StructContentHelper {
       if (this.isTagged) {
          // new parent tree entry
          if (parentTreeNextKey == null) {
-            parentTreeNextKey = getStructTreeRoot().getAsNumber(new PdfName("ParentTreeNextKey")); // read next proposed key
+            parentTreeNextKey = getStructTreeRoot().getAsNumber(PARENTTREENEXTKEY); // read next proposed key              
          }
          annotationParentTreeKey = new PdfNumber(parentTreeNextKey.intValue());
          parentTreeNextKey.increment();