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

fpdfsdk/src/formfiller/FFL_IFormFiller.cpp

Index: fpdfsdk/src/formfiller/FFL_IFormFiller.cpp
diff --git a/fpdfsdk/src/formfiller/FFL_IFormFiller.cpp b/fpdfsdk/src/formfiller/FFL_IFormFiller.cpp
index b820d7fa0d0cd2b33f60032b12b846890e11014c..3257faae681cac63cf29b8ab317fb16c6a0d1b1a 100644
--- a/fpdfsdk/src/formfiller/FFL_IFormFiller.cpp
+++ b/fpdfsdk/src/formfiller/FFL_IFormFiller.cpp
@@ -277,6 +277,12 @@ FX_BOOL CFFL_IFormFiller::OnLButtonUp(CPDFSDK_PageView* pPageView,
     OnButtonUp(pWidget, pPageView, bReset, bExit, nFlags);
     if (bExit)
       return TRUE;
+#ifdef PDF_ENABLE_XFA
+
+    OnClick(pWidget, pPageView, bReset, bExit, nFlags);
+    if (bExit)
+      return TRUE;
+#endif
   }
   return bRet;
 }
@@ -792,6 +798,190 @@ void CFFL_IFormFiller::OnFormat(CPDFSDK_Widget* pWidget,
   }
 }
 
+#ifdef PDF_ENABLE_XFA
+void CFFL_IFormFiller::OnClick(CPDFSDK_Widget* pWidget,
+                               CPDFSDK_PageView* pPageView,
+                               FX_BOOL& bReset,
+                               FX_BOOL& bExit,
+                               FX_UINT nFlag) {
+  ASSERT(pWidget != NULL);
+
+  if (!m_bNotifying) {
+    if (pWidget->HasXFAAAction(PDFSDK_XFA_Click)) {
+      m_bNotifying = TRUE;
+      int nAge = pWidget->GetAppearanceAge();
+      int nValueAge = pWidget->GetValueAge();
+
+      PDFSDK_FieldAction fa;
+      fa.bModifier = m_pApp->FFI_IsCTRLKeyDown(nFlag);
+      fa.bShift = m_pApp->FFI_IsSHIFTKeyDown(nFlag);
+
+      pWidget->OnXFAAAction(PDFSDK_XFA_Click, fa, pPageView);
+      m_bNotifying = FALSE;
+
+      if (!IsValidAnnot(pPageView, pWidget)) {
+        bExit = TRUE;
+        return;
+      }
+
+      if (nAge != pWidget->GetAppearanceAge()) {
+        if (CFFL_FormFiller* pFormFiller = GetFormFiller(pWidget, FALSE)) {
+          pFormFiller->ResetPDFWindow(pPageView,
+                                      nValueAge == pWidget->GetValueAge());
+        }
+
+        bReset = TRUE;
+      }
+    }
+  }
+}
+
+void CFFL_IFormFiller::OnFull(CPDFSDK_Widget* pWidget,
+                              CPDFSDK_PageView* pPageView,
+                              FX_BOOL& bReset,
+                              FX_BOOL& bExit,
+                              FX_UINT nFlag) {
+  ASSERT(pWidget != NULL);
+
+  if (!m_bNotifying) {
+    if (pWidget->HasXFAAAction(PDFSDK_XFA_Full)) {
+      m_bNotifying = TRUE;
+      int nAge = pWidget->GetAppearanceAge();
+      int nValueAge = pWidget->GetValueAge();
+
+      PDFSDK_FieldAction fa;
+      fa.bModifier = m_pApp->FFI_IsCTRLKeyDown(nFlag);
+      fa.bShift = m_pApp->FFI_IsSHIFTKeyDown(nFlag);
+
+      pWidget->OnXFAAAction(PDFSDK_XFA_Full, fa, pPageView);
+      m_bNotifying = FALSE;
+
+      if (!IsValidAnnot(pPageView, pWidget)) {
+        bExit = TRUE;
+        return;
+      }
+
+      if (nAge != pWidget->GetAppearanceAge()) {
+        if (CFFL_FormFiller* pFormFiller = GetFormFiller(pWidget, FALSE)) {
+          pFormFiller->ResetPDFWindow(pPageView,
+                                      nValueAge == pWidget->GetValueAge());
+        }
+
+        bReset = TRUE;
+      }
+    }
+  }
+}
+
+void CFFL_IFormFiller::OnPopupPreOpen(void* pPrivateData,
+                                      FX_BOOL& bExit,
+                                      FX_DWORD nFlag) {
+  ASSERT(pPrivateData != NULL);
+  CFFL_PrivateData* pData = (CFFL_PrivateData*)pPrivateData;
+  ASSERT(pData->pWidget != NULL);
+
+  FX_BOOL bTempReset = FALSE;
+  FX_BOOL bTempExit = FALSE;
+  this->OnPreOpen(pData->pWidget, pData->pPageView, bTempReset, bTempExit,
+                  nFlag);
+
+  if (bTempReset || bTempExit) {
+    bExit = TRUE;
+  }
+}
+
+void CFFL_IFormFiller::OnPopupPostOpen(void* pPrivateData,
+                                       FX_BOOL& bExit,
+                                       FX_DWORD nFlag) {
+  ASSERT(pPrivateData != NULL);
+  CFFL_PrivateData* pData = (CFFL_PrivateData*)pPrivateData;
+  ASSERT(pData->pWidget != NULL);
+
+  FX_BOOL bTempReset = FALSE;
+  FX_BOOL bTempExit = FALSE;
+  this->OnPostOpen(pData->pWidget, pData->pPageView, bTempReset, bTempExit,
+                   nFlag);
+
+  if (bTempReset || bTempExit) {
+    bExit = TRUE;
+  }
+}
+
+void CFFL_IFormFiller::OnPreOpen(CPDFSDK_Widget* pWidget,
+                                 CPDFSDK_PageView* pPageView,
+                                 FX_BOOL& bReset,
+                                 FX_BOOL& bExit,
+                                 FX_UINT nFlag) {
+  ASSERT(pWidget != NULL);
+
+  if (!m_bNotifying) {
+    if (pWidget->HasXFAAAction(PDFSDK_XFA_PreOpen)) {
+      m_bNotifying = TRUE;
+      int nAge = pWidget->GetAppearanceAge();
+      int nValueAge = pWidget->GetValueAge();
+
+      PDFSDK_FieldAction fa;
+      fa.bModifier = m_pApp->FFI_IsCTRLKeyDown(nFlag);
+      fa.bShift = m_pApp->FFI_IsSHIFTKeyDown(nFlag);
+
+      pWidget->OnXFAAAction(PDFSDK_XFA_PreOpen, fa, pPageView);
+      m_bNotifying = FALSE;
+
+      if (!IsValidAnnot(pPageView, pWidget)) {
+        bExit = TRUE;
+        return;
+      }
+
+      if (nAge != pWidget->GetAppearanceAge()) {
+        if (CFFL_FormFiller* pFormFiller = GetFormFiller(pWidget, FALSE)) {
+          pFormFiller->ResetPDFWindow(pPageView,
+                                      nValueAge == pWidget->GetValueAge());
+        }
+
+        bReset = TRUE;
+      }
+    }
+  }
+}
+
+void CFFL_IFormFiller::OnPostOpen(CPDFSDK_Widget* pWidget,
+                                  CPDFSDK_PageView* pPageView,
+                                  FX_BOOL& bReset,
+                                  FX_BOOL& bExit,
+                                  FX_UINT nFlag) {
+  ASSERT(pWidget != NULL);
+
+  if (!m_bNotifying) {
+    if (pWidget->HasXFAAAction(PDFSDK_XFA_PostOpen)) {
+      m_bNotifying = TRUE;
+      int nAge = pWidget->GetAppearanceAge();
+      int nValueAge = pWidget->GetValueAge();
+
+      PDFSDK_FieldAction fa;
+      fa.bModifier = m_pApp->FFI_IsCTRLKeyDown(nFlag);
+      fa.bShift = m_pApp->FFI_IsSHIFTKeyDown(nFlag);
+
+      pWidget->OnXFAAAction(PDFSDK_XFA_PostOpen, fa, pPageView);
+      m_bNotifying = FALSE;
+
+      if (!IsValidAnnot(pPageView, pWidget)) {
+        bExit = TRUE;
+        return;
+      }
+
+      if (nAge != pWidget->GetAppearanceAge()) {
+        if (CFFL_FormFiller* pFormFiller = GetFormFiller(pWidget, FALSE)) {
+          pFormFiller->ResetPDFWindow(pPageView,
+                                      nValueAge == pWidget->GetValueAge());
+        }
+
+        bReset = TRUE;
+      }
+    }
+  }
+}
+
+#endif
 FX_BOOL CFFL_IFormFiller::IsValidAnnot(CPDFSDK_PageView* pPageView,
                                        CPDFSDK_Annot* pAnnot) {
   if (pPageView)
@@ -816,6 +1006,19 @@ void CFFL_IFormFiller::OnBeforeKeyStroke(void* pPrivateData,
   CFFL_FormFiller* pFormFiller = GetFormFiller(pData->pWidget, FALSE);
   ASSERT(pFormFiller != NULL);
 
+#ifdef PDF_ENABLE_XFA
+  if (pFormFiller->IsFieldFull(pData->pPageView)) {
+    FX_BOOL bFullExit = FALSE;
+    FX_BOOL bFullReset = FALSE;
+    OnFull(pData->pWidget, pData->pPageView, bFullReset, bFullExit, nFlag);
+
+    if (bFullReset || bFullExit) {
+      bExit = TRUE;
+      return;
+    }
+  }
+
+#endif
   if (!m_bNotifying) {
     if (pData->pWidget->GetAAction(CPDF_AAction::KeyStroke)) {
       m_bNotifying = TRUE;