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

fpdfsdk/include/pdfwindow/PWL_Edit.h

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #ifndef FPDFSDK_INCLUDE_PDFWINDOW_PWL_EDIT_H_
 #define FPDFSDK_INCLUDE_PDFWINDOW_PWL_EDIT_H_
 
 #include "PWL_EditCtrl.h"
@@ skipping 15 matching lines @@
       FX_FLOAT& fPopupRet) = 0;  // nRet: (0:bottom 1:top)
   virtual void OnBeforeKeyStroke(void* pPrivateData,
                                  CFX_WideString& strChange,
                                  const CFX_WideString& strChangeEx,
                                  int nSelStart,
                                  int nSelEnd,
                                  FX_BOOL bKeyDown,
                                  FX_BOOL& bRC,
                                  FX_BOOL& bExit,
                                  FX_DWORD nFlag) = 0;
+#ifdef PDF_ENABLE_XFA
+
+  virtual void OnPopupPreOpen(void* pPrivateData,
+                              FX_BOOL& bExit,
+                              FX_DWORD nFlag) = 0;
+  virtual void OnPopupPostOpen(void* pPrivateData,
+                               FX_BOOL& bExit,
+                               FX_DWORD nFlag) = 0;
+#endif
 };
 
 class CPWL_Edit : public CPWL_EditCtrl, public IFX_Edit_OprNotify {
  public:
   CPWL_Edit();
   ~CPWL_Edit() override;
 
   // CPWL_EditCtrl
   CFX_ByteString GetClassName() const override;
   void OnDestroy() override;
@@ skipping 109 matching lines @@
   CPDF_Rect m_rcOldWindow;
 
  public:
   void AttachFFLData(void* pData) { m_pFormFiller = pData; }
 
  private:
   void* m_pFormFiller;
 };
 
 #endif  // FPDFSDK_INCLUDE_PDFWINDOW_PWL_EDIT_H_