Fix nullptr crash inXFA_FFBarcode::UpdateWidgetProperty().

xfa/fxfa/app/xfa_ffbarcode.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 "xfa/fxfa/app/xfa_ffbarcode.h"
 
 #include "core/fxcrt/fx_ext.h"
 #include "xfa/fwl/core/fwl_noteimp.h"
@@ skipping 143 matching lines @@
   CXFA_Border borderUI = m_pDataAcc->GetUIBorder();
   DrawBorder(pGS, borderUI, m_rtUI, &mtRotate);
   RenderCaption(pGS, &mtRotate);
   CFX_RectF rtWidget;
   m_pNormalWidget->GetWidgetRect(rtWidget);
   CFX_Matrix mt;
   mt.Set(1, 0, 0, 1, rtWidget.left, rtWidget.top);
   mt.Concat(mtRotate);
   m_pNormalWidget->DrawWidget(pGS, &mt);
 }
+
 void CXFA_FFBarcode::UpdateWidgetProperty() {
   CXFA_FFTextEdit::UpdateWidgetProperty();
   CFWL_Barcode* pBarCodeWidget = (CFWL_Barcode*)m_pNormalWidget;
   CFX_WideString wsType = GetDataAcc()->GetBarcodeType();
   XFA_LPCBARCODETYPEENUMINFO pBarcodeTypeInfo =
       XFA_GetBarcodeTypeByName(wsType.AsStringC());
+  if (!pBarcodeTypeInfo)
+    return;
+
   pBarCodeWidget->SetType(pBarcodeTypeInfo->eBCType);
   CXFA_WidgetAcc* pAcc = GetDataAcc();
   int32_t intVal;
   FX_CHAR charVal;
   FX_BOOL boolVal;
   FX_FLOAT floatVal;
   if (pAcc->GetBarcodeAttribute_CharEncoding(intVal)) {
     pBarCodeWidget->SetCharEncoding((BC_CHAR_ENCODING)intVal);
   }
   if (pAcc->GetBarcodeAttribute_Checksum(intVal)) {
@@ skipping 29 matching lines @@
   if (pAcc->GetBarcodeAttribute_WideNarrowRatio(floatVal)) {
     pBarCodeWidget->SetWideNarrowRatio((int32_t)floatVal);
   }
   if (pBarcodeTypeInfo->eName == XFA_BARCODETYPE_code3Of9 ||
       pBarcodeTypeInfo->eName == XFA_BARCODETYPE_ean8 ||
       pBarcodeTypeInfo->eName == XFA_BARCODETYPE_ean13 ||
       pBarcodeTypeInfo->eName == XFA_BARCODETYPE_upcA) {
     pBarCodeWidget->SetPrintChecksum(TRUE);
   }
 }
+
 FX_BOOL CXFA_FFBarcode::OnLButtonDown(uint32_t dwFlags,
                                       FX_FLOAT fx,
                                       FX_FLOAT fy) {
   CFWL_Barcode* pBarCodeWidget = (CFWL_Barcode*)m_pNormalWidget;
   if (!pBarCodeWidget || pBarCodeWidget->IsProtectedType()) {
     return FALSE;
   }
   if (m_pDataAcc->GetAccess() != XFA_ATTRIBUTEENUM_Open) {
     return FALSE;
   }
   return CXFA_FFTextEdit::OnLButtonDown(dwFlags, fx, fy);
 }
 FX_BOOL CXFA_FFBarcode::OnRButtonDown(uint32_t dwFlags,
                                       FX_FLOAT fx,
                                       FX_FLOAT fy) {
   CFWL_Barcode* pBarCodeWidget = (CFWL_Barcode*)m_pNormalWidget;
   if (!pBarCodeWidget || pBarCodeWidget->IsProtectedType()) {
     return FALSE;
   }
   return CXFA_FFTextEdit::OnRButtonDown(dwFlags, fx, fy);
 }