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

fpdfsdk/src/formfiller/FFL_ComboBox.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 "fpdfsdk/include/formfiller/FFL_CBA_Fontmap.h"
 #include "fpdfsdk/include/formfiller/FFL_ComboBox.h"
 #include "fpdfsdk/include/formfiller/FFL_FormFiller.h"
 #include "fpdfsdk/include/formfiller/FFL_IFormFiller.h"
@@ skipping 238 matching lines @@
     RestoreState(pPageView);
     pRet = GetPDFWindow(pPageView, FALSE);
   } else
     pRet = GetPDFWindow(pPageView, TRUE);
 
   m_pWidget->UpdateField();
 
   return pRet;
 }
 
+#ifdef PDF_ENABLE_XFA
+FX_BOOL CFFL_ComboBox::IsFieldFull(CPDFSDK_PageView* pPageView) {
+  if (CPWL_ComboBox* pComboBox =
+          static_cast<CPWL_ComboBox*>(GetPDFWindow(pPageView, FALSE))) {
+    if (CPWL_Edit* pEdit = pComboBox->GetEdit())
+      return pEdit->IsTextFull();
+  }
+  return FALSE;
+}
+
+#endif
 void CFFL_ComboBox::OnSetFocus(CPWL_Wnd* pWnd) {
   ASSERT(m_pApp != NULL);
 
   ASSERT(pWnd != NULL);
 
   if (pWnd->GetClassName() == PWL_CLASSNAME_EDIT) {
     CPWL_Edit* pEdit = (CPWL_Edit*)pWnd;
     pEdit->SetCharSet(134);
     pEdit->SetCodePage(936);
 
@@ skipping 30 matching lines @@
   if (nExport >= 0) {
     if (CPDF_FormField* pFormField = m_pWidget->GetFormField()) {
       swRet = pFormField->GetOptionValue(nExport);
       if (swRet.IsEmpty())
         swRet = pFormField->GetOptionLabel(nExport);
     }
   }
 
   return swRet;
 }