core/ difference with XFA (for information only).

core/src/fpdfdoc/doc_formfield.cpp

Index: core/src/fpdfdoc/doc_formfield.cpp
diff --git a/core/src/fpdfdoc/doc_formfield.cpp b/core/src/fpdfdoc/doc_formfield.cpp
index 193ed21d450f32d34e9420a7c471bec543d6208c..6f90d7e396811dcf140252f9d9aa6f9d8041556c 100644
--- a/core/src/fpdfdoc/doc_formfield.cpp
+++ b/core/src/fpdfdoc/doc_formfield.cpp
@@ -739,6 +739,85 @@ int CPDF_FormField::FindOptionValue(const CFX_WideString& csOptValue,
   }
   return -1;
 }
+#ifdef PDF_ENABLE_XFA
+int CPDF_FormField::InsertOption(CFX_WideString csOptLabel,
+                                 int index,
+                                 FX_BOOL bNotify) {
+  if (csOptLabel.IsEmpty())
+    return -1;
+
+  if (bNotify && m_pForm->m_pFormNotify != NULL) {
+    int iRet = 0;
+    if (GetType() == ListBox)
+      iRet = m_pForm->m_pFormNotify->BeforeSelectionChange(this, csOptLabel);
+    if (GetType() == ComboBox)
+      iRet = m_pForm->m_pFormNotify->BeforeValueChange(this, csOptLabel);
+    if (iRet < 0)
+      return -1;
+  }
+
+  CFX_ByteString csStr = PDF_EncodeText(csOptLabel, csOptLabel.GetLength());
+  CPDF_Array* pOpt = NULL;
+  CPDF_Object* pValue = FPDF_GetFieldAttr(m_pDict, "Opt");
+  if (pValue == NULL || pValue->GetType() != PDFOBJ_ARRAY) {
+    pOpt = CPDF_Array::Create();
+    if (pOpt == NULL)
+      return -1;
+    m_pDict->SetAt("Opt", pOpt);
+  } else
+    pOpt = (CPDF_Array*)pValue;
+  int iCount = (int)pOpt->GetCount();
+  if (index < 0 || index >= iCount) {
+    pOpt->AddString(csStr);
+    index = iCount;
+  } else {
+    CPDF_String* pString = CPDF_String::Create(csStr);
+    if (pString == NULL)
+      return -1;
+    pOpt->InsertAt(index, pString);
+  }
+
+  if (bNotify && m_pForm->m_pFormNotify != NULL) {
+    if (GetType() == ListBox)
+      m_pForm->m_pFormNotify->AfterSelectionChange(this);
+    if (GetType() == ComboBox)
+      m_pForm->m_pFormNotify->AfterValueChange(this);
+  }
+  m_pForm->m_bUpdated = TRUE;
+  return index;
+}
+FX_BOOL CPDF_FormField::ClearOptions(FX_BOOL bNotify) {
+  if (bNotify && m_pForm->m_pFormNotify != NULL) {
+    int iRet = 0;
+    CFX_WideString csValue;
+    int iIndex = GetSelectedIndex(0);
+    if (iIndex >= 0)
+      csValue = GetOptionLabel(iIndex);
+    if (GetType() == ListBox)
+      iRet = m_pForm->m_pFormNotify->BeforeSelectionChange(this, csValue);
+    if (GetType() == ComboBox)
+      iRet = m_pForm->m_pFormNotify->BeforeValueChange(this, csValue);
+    if (iRet < 0)
+      return FALSE;
+  }
+
+  m_pDict->RemoveAt("Opt");
+  m_pDict->RemoveAt("V");
+  m_pDict->RemoveAt("DV");
+  m_pDict->RemoveAt("I");
+  m_pDict->RemoveAt("TI");
+
+  if (bNotify && m_pForm->m_pFormNotify != NULL) {
+    if (GetType() == ListBox)
+      m_pForm->m_pFormNotify->AfterSelectionChange(this);
+    if (GetType() == ComboBox)
+      m_pForm->m_pFormNotify->AfterValueChange(this);
+  }
+
+  m_pForm->m_bUpdated = TRUE;
+  return TRUE;
+}
+#endif
 FX_BOOL CPDF_FormField::CheckControl(int iControlIndex,
                                      FX_BOOL bChecked,
                                      FX_BOOL bNotify) {