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

fpdfsdk/include/fsdk_annothandler.h

Index: fpdfsdk/include/fsdk_annothandler.h
diff --git a/fpdfsdk/include/fsdk_annothandler.h b/fpdfsdk/include/fsdk_annothandler.h
index 53efa63fc5db90aa477935009b92aa366536507a..d43bc7b7e922ca5637fb7d0e681c920447af9897 100644
--- a/fpdfsdk/include/fsdk_annothandler.h
+++ b/fpdfsdk/include/fsdk_annothandler.h
@@ -12,6 +12,10 @@
 
 #include "core/include/fxcrt/fx_basic.h"
 
+#ifdef PDF_ENABLE_XFA
+#define FSDK_XFAWIDGET_TYPENAME "XFAWidget"
+
+#endif
 class CFFL_IFormFiller;
 class CFX_RenderDevice;
 class CPDFDoc_Environment;
@@ -35,6 +39,11 @@ class IPDFSDK_AnnotHandler {
   virtual CPDFSDK_Annot* NewAnnot(CPDF_Annot* pAnnot,
                                   CPDFSDK_PageView* pPage) = 0;
 
+#ifdef PDF_ENABLE_XFA
+  virtual CPDFSDK_Annot* NewAnnot(IXFA_Widget* hWidget,
+                                  CPDFSDK_PageView* pPage) = 0;
+
+#endif
   virtual void ReleaseAnnot(CPDFSDK_Annot* pAnnot) = 0;
 
   virtual void DeleteAnnot(CPDFSDK_Annot* pAnnot) = 0;
@@ -119,6 +128,10 @@ class IPDFSDK_AnnotHandler {
 
   virtual FX_BOOL OnSetFocus(CPDFSDK_Annot* pAnnot, FX_DWORD nFlag) = 0;
   virtual FX_BOOL OnKillFocus(CPDFSDK_Annot* pAnnot, FX_DWORD nFlag) = 0;
+#ifdef PDF_ENABLE_XFA
+  virtual FX_BOOL OnXFAChangedFocus(CPDFSDK_Annot* pOldAnnot,
+                                    CPDFSDK_Annot* pNewAnnot) = 0;
+#endif
 };
 
 class CPDFSDK_BFAnnotHandler : public IPDFSDK_AnnotHandler {
@@ -132,6 +145,10 @@ class CPDFSDK_BFAnnotHandler : public IPDFSDK_AnnotHandler {
   CFX_ByteString GetName() override { return CFX_ByteString("WidgetHandler"); }
   FX_BOOL CanAnswer(CPDFSDK_Annot* pAnnot) override;
   CPDFSDK_Annot* NewAnnot(CPDF_Annot* pAnnot, CPDFSDK_PageView* pPage) override;
+#ifdef PDF_ENABLE_XFA
+  CPDFSDK_Annot* NewAnnot(IXFA_Widget* hWidget,
+                          CPDFSDK_PageView* pPage) override;
+#endif
   void ReleaseAnnot(CPDFSDK_Annot* pAnnot) override;
   void DeleteAnnot(CPDFSDK_Annot* pAnnot) override {}
   CPDF_Rect GetViewBBox(CPDFSDK_PageView* pPageView,
@@ -204,6 +221,12 @@ class CPDFSDK_BFAnnotHandler : public IPDFSDK_AnnotHandler {
   void OnSelected(CPDFSDK_Annot* pAnnot) override {}
   FX_BOOL OnSetFocus(CPDFSDK_Annot* pAnnot, FX_DWORD nFlag) override;
   FX_BOOL OnKillFocus(CPDFSDK_Annot* pAnnot, FX_DWORD nFlag) override;
+#ifdef PDF_ENABLE_XFA
+  FX_BOOL OnXFAChangedFocus(CPDFSDK_Annot* pOldAnnot,
+                            CPDFSDK_Annot* pNewAnnot) override {
+    return TRUE;
+  }
+#endif
 
   void SetFormFiller(CFFL_IFormFiller* pFiller) { m_pFormFiller = pFiller; }
   CFFL_IFormFiller* GetFormFiller() { return m_pFormFiller; }
@@ -213,6 +236,121 @@ class CPDFSDK_BFAnnotHandler : public IPDFSDK_AnnotHandler {
   CFFL_IFormFiller* m_pFormFiller;
 };
 
+#ifdef PDF_ENABLE_XFA
+class CPDFSDK_XFAAnnotHandler : public IPDFSDK_AnnotHandler {
+ public:
+  explicit CPDFSDK_XFAAnnotHandler(CPDFDoc_Environment* pApp);
+  ~CPDFSDK_XFAAnnotHandler() {}
+
+ public:
+  virtual CFX_ByteString GetType() { return FSDK_XFAWIDGET_TYPENAME; }
+
+  virtual CFX_ByteString GetName() { return "XFAWidgetHandler"; }
+
+  virtual FX_BOOL CanAnswer(CPDFSDK_Annot* pAnnot);
+
+  virtual CPDFSDK_Annot* NewAnnot(CPDF_Annot* pAnnot, CPDFSDK_PageView* pPage) {
+    return NULL;
+  }
+
+  virtual CPDFSDK_Annot* NewAnnot(IXFA_Widget* pAnnot, CPDFSDK_PageView* pPage);
+
+  virtual void ReleaseAnnot(CPDFSDK_Annot* pAnnot);
+
+  virtual void DeleteAnnot(CPDFSDK_Annot* pAnnot) {}
+
+  virtual CPDF_Rect GetViewBBox(CPDFSDK_PageView* pPageView,
+                                CPDFSDK_Annot* pAnnot);
+
+  virtual FX_BOOL HitTest(CPDFSDK_PageView* pPageView,
+                          CPDFSDK_Annot* pAnnot,
+                          const CPDF_Point& point);
+
+  virtual void OnDraw(CPDFSDK_PageView* pPageView,
+                      CPDFSDK_Annot* pAnnot,
+                      CFX_RenderDevice* pDevice,
+                      CPDF_Matrix* pUser2Device,
+                      FX_DWORD dwFlags);
+
+  virtual void OnDrawSleep(CPDFSDK_PageView* pPageView,
+                           CPDFSDK_Annot* pAnnot,
+                           CFX_RenderDevice* pDevice,
+                           CPDF_Matrix* pUser2Device,
+                           const CPDF_Rect& rcWindow,
+                           FX_DWORD dwFlags) {}
+
+  virtual void OnCreate(CPDFSDK_Annot* pAnnot) {}
+
+  virtual void OnLoad(CPDFSDK_Annot* pAnnot) {}
+
+  virtual void OnDelete(CPDFSDK_Annot* pAnnot) {}
+
+  virtual void OnRelease(CPDFSDK_Annot* pAnnot) {}
+
+  virtual void OnMouseEnter(CPDFSDK_PageView* pPageView,
+                            CPDFSDK_Annot* pAnnot,
+                            FX_DWORD nFlag);
+  virtual void OnMouseExit(CPDFSDK_PageView* pPageView,
+                           CPDFSDK_Annot* pAnnot,
+                           FX_DWORD nFlag);
+
+  virtual FX_BOOL OnLButtonDown(CPDFSDK_PageView* pPageView,
+                                CPDFSDK_Annot* pAnnot,
+                                FX_DWORD nFlags,
+                                const CPDF_Point& point);
+  virtual FX_BOOL OnLButtonUp(CPDFSDK_PageView* pPageView,
+                              CPDFSDK_Annot* pAnnot,
+                              FX_DWORD nFlags,
+                              const CPDF_Point& point);
+  virtual FX_BOOL OnLButtonDblClk(CPDFSDK_PageView* pPageView,
+                                  CPDFSDK_Annot* pAnnot,
+                                  FX_DWORD nFlags,
+                                  const CPDF_Point& point);
+  virtual FX_BOOL OnMouseMove(CPDFSDK_PageView* pPageView,
+                              CPDFSDK_Annot* pAnnot,
+                              FX_DWORD nFlags,
+                              const CPDF_Point& point);
+  virtual FX_BOOL OnMouseWheel(CPDFSDK_PageView* pPageView,
+                               CPDFSDK_Annot* pAnnot,
+                               FX_DWORD nFlags,
+                               short zDelta,
+                               const CPDF_Point& point);
+  virtual FX_BOOL OnRButtonDown(CPDFSDK_PageView* pPageView,
+                                CPDFSDK_Annot* pAnnot,
+                                FX_DWORD nFlags,
+                                const CPDF_Point& point);
+  virtual FX_BOOL OnRButtonUp(CPDFSDK_PageView* pPageView,
+                              CPDFSDK_Annot* pAnnot,
+                              FX_DWORD nFlags,
+                              const CPDF_Point& point);
+  virtual FX_BOOL OnRButtonDblClk(CPDFSDK_PageView* pPageView,
+                                  CPDFSDK_Annot* pAnnot,
+                                  FX_DWORD nFlags,
+                                  const CPDF_Point& point);
+  // by wjm.
+  virtual FX_BOOL OnChar(CPDFSDK_Annot* pAnnot,
+                         FX_DWORD nChar,
+                         FX_DWORD nFlags);
+  virtual FX_BOOL OnKeyDown(CPDFSDK_Annot* pAnnot, int nKeyCode, int nFlag);
+  virtual FX_BOOL OnKeyUp(CPDFSDK_Annot* pAnnot, int nKeyCode, int nFlag);
+
+  virtual void OnDeSelected(CPDFSDK_Annot* pAnnot) {}
+  virtual void OnSelected(CPDFSDK_Annot* pAnnot) {}
+
+  virtual FX_BOOL OnSetFocus(CPDFSDK_Annot* pAnnot, FX_DWORD nFlag);
+  virtual FX_BOOL OnKillFocus(CPDFSDK_Annot* pAnnot, FX_DWORD nFlag);
+  virtual FX_BOOL OnXFAChangedFocus(CPDFSDK_Annot* pOldAnnot,
+                                    CPDFSDK_Annot* pNewAnnot);
+
+ private:
+  IXFA_WidgetHandler* GetXFAWidgetHandler(CPDFSDK_Annot* pAnnot);
+  FX_DWORD GetFWLFlags(FX_DWORD dwFlag);
+
+ private:
+  CPDFDoc_Environment* m_pApp;
+};
+
+#endif
 #define CBA_AnnotHandlerArray CFX_ArrayTemplate<IPDFSDK_AnnotHandler*>
 class CPDFSDK_AnnotHandlerMgr {
  public:
@@ -226,6 +364,10 @@ class CPDFSDK_AnnotHandlerMgr {
 
   virtual CPDFSDK_Annot* NewAnnot(CPDF_Annot* pAnnot,
                                   CPDFSDK_PageView* pPageView);
+#ifdef PDF_ENABLE_XFA
+  virtual CPDFSDK_Annot* NewAnnot(IXFA_Widget* pAnnot,
+                                  CPDFSDK_PageView* pPageView);
+#endif
   virtual void ReleaseAnnot(CPDFSDK_Annot* pAnnot);
 
   virtual void Annot_OnCreate(CPDFSDK_Annot* pAnnot);
@@ -287,6 +429,10 @@ class CPDFSDK_AnnotHandlerMgr {
 
   virtual FX_BOOL Annot_OnSetFocus(CPDFSDK_Annot* pAnnot, FX_DWORD nFlag);
   virtual FX_BOOL Annot_OnKillFocus(CPDFSDK_Annot* pAnnot, FX_DWORD nFlag);
+#ifdef PDF_ENABLE_XFA
+  virtual FX_BOOL Annot_OnChangeFocus(CPDFSDK_Annot* pSetAnnot,
+                                      CPDFSDK_Annot* pKillAnnot);
+#endif
 
   virtual CPDF_Rect Annot_OnGetViewBBox(CPDFSDK_PageView* pPageView,
                                         CPDFSDK_Annot* pAnnot);