Deal with ca and CA transparency operators in pdf. add comments to generated classes.

experimental/PdfViewer/SkPdfStructureElementAccessDictionary_autogen.h

 #ifndef __DEFINED__SkPdfStructureElementAccessDictionary
 #define __DEFINED__SkPdfStructureElementAccessDictionary
 
 #include "SkPdfEnums_autogen.h"
 #include "SkPdfArray_autogen.h"
 #include "SkPdfDictionary_autogen.h"
 
+// Additional dictionary entries for structure element access
 class SkPdfStructureElementAccessDictionary : public SkPdfDictionary {
 public:
   virtual SkPdfObjectType getType() const { return kStructureElementAccessDictionary_SkPdfObjectType;}
   virtual SkPdfObjectType getTypeEnd() const { return (SkPdfObjectType)(kStructureElementAccessDictionary_SkPdfObjectType + 1);}
 public:
   virtual SkPdfStructureElementAccessDictionary* asStructureElementAccessDictionary() {return this;}
   virtual const SkPdfStructureElementAccessDictionary* asStructureElementAccessDictionary() const {return this;}
 
 private:
   virtual SkPdfALinkAnnotationDictionary* asALinkAnnotationDictionary() {return NULL;}
@@ skipping 496 matching lines @@
 
 public:
 private:
 public:
   SkPdfStructureElementAccessDictionary(const PdfMemDocument* podofoDoc = NULL, const PdfObject* podofoObj = NULL) : SkPdfDictionary(podofoDoc, podofoObj) {}
 
   virtual bool valid() const {return true;}
 
   SkPdfStructureElementAccessDictionary& operator=(const SkPdfStructureElementAccessDictionary& from) {this->fPodofoDoc = from.fPodofoDoc; this->fPodofoObj = from.fPodofoObj; return *this;}
 
+/** (Required for all objects that are structural content items; PDF 1.3) The integer key
+ *  of this object's entry in the structural parent tree.
+**/
+  bool has_StructParent() const {
+    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "StructParent", "", NULL));
+  }
+
   long StructParent() const {
     long ret;
     if (LongFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "StructParent", "", &ret)) return ret;
     // TODO(edisonn): warn about missing required field, assert for known good pdfs
     return 0;
   }
 
+/** (Required for all content streams containing marked-content sequences that are
+ *  structural content items; PDF 1.3) The integer key of this object's entry in the
+ *  structural parent tree.
+ *  Note: At most one of these two entries may be present in a given object. An object
+ *  can be either a content item in its entirety or a container for marked-content
+ *  sequences that are content items, but not both.
+**/
+  bool has_StructParents() const {
+    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "StructParents", "", NULL));
+  }
+
   long StructParents() const {
     long ret;
     if (LongFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "StructParents", "", &ret)) return ret;
     // TODO(edisonn): warn about missing required field, assert for known good pdfs
     return 0;
   }
 
 };
 
 #endif  // __DEFINED__SkPdfStructureElementAccessDictionary