core/ difference with XFA (for information only).

core/src/fpdfdoc/doc_formfield.cpp

 // 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
 
 #include "../../include/fpdfdoc/fpdf_doc.h"
 #include "doc_utils.h"
 
 FX_BOOL PDF_FormField_IsUnison(CPDF_FormField* pField) {
@@ skipping 721 matching lines @@
   }
   int iCount = CountOptions();
   for (; iStartIndex < iCount; iStartIndex++) {
     CFX_WideString csValue = GetOptionValue(iStartIndex);
     if (csValue == csOptValue) {
       return iStartIndex;
     }
   }
   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) {
   ASSERT(GetType() == CheckBox || GetType() == RadioButton);
   CPDF_FormControl* pControl = GetControl(iControlIndex);
   if (pControl == NULL) {
     return FALSE;
   }
   if (!bChecked && pControl->IsChecked() == bChecked) {
     return FALSE;
@@ skipping 283 matching lines @@
       m_pForm->m_pFormDict->GetDict("DR")->GetDict("Font"))
     pFontDict = m_pForm->m_pFormDict->GetDict("DR")->GetDict("Font")->GetDict(
         font_name);
 
   if (pFontDict == NULL) {
     return;
   }
   m_pFont = m_pForm->m_pDocument->LoadFont(pFontDict);
   m_FontSize = FX_atof(syntax.GetWord());
 }