fpdfsdk/ differences with XFA (for didactic purposes only).

fpdfsdk/src/fsdk_baseannot.cpp

Index: fpdfsdk/src/fsdk_baseannot.cpp
diff --git a/fpdfsdk/src/fsdk_baseannot.cpp b/fpdfsdk/src/fsdk_baseannot.cpp
index e124ace2a340c4035c874e7de7d55d626ab63827..2453ec5596d53a4912e00517e0d44d7ebb8549d3 100644
--- a/fpdfsdk/src/fsdk_baseannot.cpp
+++ b/fpdfsdk/src/fsdk_baseannot.cpp
@@ -5,6 +5,9 @@
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "core/include/fxcrt/fx_ext.h"
+#ifdef PDF_ENABLE_XFA
+#include "fpdfsdk/include/fpdfxfa/fpdfxfa_doc.h"
+#endif
 #include "fpdfsdk/include/fsdk_baseannot.h"
 #include "fpdfsdk/include/fsdk_define.h"
 #include "fpdfsdk/include/fsdk_mgr.h"
@@ -966,6 +969,12 @@ CPDF_Action CPDFSDK_BAAnnot::GetAAction(CPDF_AAction::AActionType eAAT) {
   return CPDF_Action();
 }
 
+#ifdef PDF_ENABLE_XFA
+FX_BOOL CPDFSDK_BAAnnot::IsXFAField() {
+  return FALSE;
+}
+
+#endif
 void CPDFSDK_BAAnnot::Annot_OnDraw(CFX_RenderDevice* pDevice,
                                    CPDF_Matrix* pUser2Device,
                                    CPDF_RenderOptions* pOptions) {
@@ -977,7 +986,11 @@ void CPDFSDK_BAAnnot::Annot_OnDraw(CFX_RenderDevice* pDevice,
 }
 
 UnderlyingPageType* CPDFSDK_Annot::GetUnderlyingPage() {
+#ifndef PDF_ENABLE_XFA
   return GetPDFPage();
+#else
+  return GetPDFXFAPage();
+#endif
 }
 
 CPDF_Page* CPDFSDK_Annot::GetPDFPage() {
@@ -985,3 +998,11 @@ CPDF_Page* CPDFSDK_Annot::GetPDFPage() {
     return m_pPageView->GetPDFPage();
   return NULL;
 }
+#ifdef PDF_ENABLE_XFA
+
+CPDFXFA_Page* CPDFSDK_Annot::GetPDFXFAPage() {
+  if (m_pPageView)
+    return m_pPageView->GetPDFXFAPage();
+  return NULL;
+}
+#endif