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

experimental/PdfViewer/SkPdfVariableTextFieldDictionary_autogen.h

 #ifndef __DEFINED__SkPdfVariableTextFieldDictionary
 #define __DEFINED__SkPdfVariableTextFieldDictionary
 
 #include "SkPdfEnums_autogen.h"
 #include "SkPdfArray_autogen.h"
 #include "SkPdfDictionary_autogen.h"
 
+// Additional entries common to all fields containing variable text
 class SkPdfVariableTextFieldDictionary : public SkPdfDictionary {
 public:
   virtual SkPdfObjectType getType() const { return kVariableTextFieldDictionary_SkPdfObjectType;}
   virtual SkPdfObjectType getTypeEnd() const { return (SkPdfObjectType)(kVariableTextFieldDictionary_SkPdfObjectType + 1);}
 public:
   virtual SkPdfVariableTextFieldDictionary* asVariableTextFieldDictionary() {return this;}
   virtual const SkPdfVariableTextFieldDictionary* asVariableTextFieldDictionary() const {return this;}
 
 private:
   virtual SkPdfALinkAnnotationDictionary* asALinkAnnotationDictionary() {return NULL;}
@@ skipping 496 matching lines @@
 
 public:
 private:
 public:
   SkPdfVariableTextFieldDictionary(const PdfMemDocument* podofoDoc = NULL, const PdfObject* podofoObj = NULL) : SkPdfDictionary(podofoDoc, podofoObj) {}
 
   virtual bool valid() const {return true;}
 
   SkPdfVariableTextFieldDictionary& operator=(const SkPdfVariableTextFieldDictionary& from) {this->fPodofoDoc = from.fPodofoDoc; this->fPodofoObj = from.fPodofoObj; return *this;}
 
+/** (Required; inheritable) A resource dictionary (see Section 3.7.2, "Resource Diction-
+ *  aries") containing default resources (such as fonts, patterns, or color spaces) to be used
+ *  by the appearance stream. At a minimum, this dictionary must contain a Font entry
+ *  specifying the resource name and font dictionary of the default font for displaying the
+ *  field's text. (See implementation note 84 in Appendix H.)
+**/
+  bool has_DR() const {
+    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "DR", "", NULL));
+  }
+
   SkPdfDictionary* DR() const {
     SkPdfDictionary* ret;
     if (DictionaryFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "DR", "", &ret)) return ret;
     // TODO(edisonn): warn about missing required field, assert for known good pdfs
     return NULL;
   }
 
+/** (Required; inheritable) The default appearance string, containing a sequence of valid
+ *  page-content graphics or text state operators defining such properties as the field's text
+ *  size and color.
+**/
+  bool has_DA() const {
+    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "DA", "", NULL));
+  }
+
   std::string DA() const {
     std::string ret;
     if (StringFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "DA", "", &ret)) return ret;
     // TODO(edisonn): warn about missing required field, assert for known good pdfs
     return "";
   }
 
+/** (Optional; inheritable) A code specifying the form of quadding (justification) to be
+ *  used in displaying the text:
+ *      0    Left-justified
+ *      1    Centered
+ *      2    Right-justified
+ *  Default value: 0 (left-justified).
+**/
+  bool has_Q() const {
+    return (ObjectFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Q", "", NULL));
+  }
+
   long Q() const {
     long ret;
     if (LongFromDictionary(fPodofoDoc, fPodofoObj->GetDictionary(), "Q", "", &ret)) return ret;
     // TODO(edisonn): warn about missing required field, assert for known good pdfs
     return 0;
   }
 
 };
 
 #endif  // __DEFINED__SkPdfVariableTextFieldDictionary