🐛 Link newly created accessubility object to existing one while fixing ancestor tree

Author: cma-oncomfort-ext

openhtmltopdf-pdfbox/src/main/java/com/openhtmltopdf/pdfboxout/PdfBoxAccessibilityHelper.java

@@ -913,7 +913,9 @@ private COSDictionary createMarkedContentDictionary() {
 
     private void ensureAncestorTree(AbstractTreeItem child, Box parent) {
         // Walk up the ancestor tree making sure they all have accessibility objects.
+        boolean newAccessibilityObjectCreated=false;
         while (parent != null && parent.getAccessibilityObject() == null) {
+            newAccessibilityObjectCreated=true;
             AbstractStructualElement parentItem = createStructureItem(null, parent);
             parent.setAccessiblityObject(parentItem);
 
@@ -923,6 +925,11 @@ private void ensureAncestorTree(AbstractTreeItem child, Box parent) {
             child = parentItem;
             parent = parent.getParent();
         }
+        if(newAccessibilityObjectCreated) {
+            AbstractStructualElement alreadyExistingAccessibilityObject = (AbstractStructualElement) parent.getAccessibilityObject();
+            child.parent = alreadyExistingAccessibilityObject;
+            alreadyExistingAccessibilityObject.addChild(child);
+        }
     }
 
     private AbstractStructualElement createStructureItem(StructureType type, Box box) {