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

fpdfsdk/src/formfiller/FFL_ComboBox.cpp

Index: fpdfsdk/src/formfiller/FFL_ComboBox.cpp
diff --git a/fpdfsdk/src/formfiller/FFL_ComboBox.cpp b/fpdfsdk/src/formfiller/FFL_ComboBox.cpp
index 858cc6285a7fe64550a0453d52223de13c72d7f5..a348d054a1f83f1e6d74a96f4207c913efaf8457 100644
--- a/fpdfsdk/src/formfiller/FFL_ComboBox.cpp
+++ b/fpdfsdk/src/formfiller/FFL_ComboBox.cpp
@@ -256,6 +256,17 @@ CPWL_Wnd* CFFL_ComboBox::ResetPDFWindow(CPDFSDK_PageView* pPageView,
   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);