Pass CFX_WideString further down widget callers

fpdfsdk/javascript/Field.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/javascript/Field.h"
 
 #include <algorithm>
 #include <memory>
@@ skipping 257 matching lines @@
 
     int nFieldType = pFormField->GetFieldType();
     if (nFieldType == FIELDTYPE_COMBOBOX || nFieldType == FIELDTYPE_TEXTFIELD) {
       for (CPDFSDK_Annot* pAnnot : widgets) {
         FX_BOOL bFormatted = FALSE;
         CPDFSDK_Annot::Observer observer(&pAnnot);
         CFX_WideString sValue =
             static_cast<CPDFSDK_Widget*>(pAnnot)->OnFormat(bFormatted);
         if (pAnnot) {
           static_cast<CPDFSDK_Widget*>(pAnnot)->ResetAppearance(
-              bFormatted ? sValue.c_str() : nullptr, FALSE);
+              bFormatted ? &sValue : nullptr, FALSE);
         }
       }
     } else {
       for (CPDFSDK_Widget* pWidget : widgets) {
         pWidget->ResetAppearance(nullptr, FALSE);
       }
     }
   }
 
   if (bRefresh) {
@@ skipping 23 matching lines @@
   CPDFSDK_InterForm* pForm = pDocument->GetInterForm();
   CPDFSDK_Widget* pWidget = pForm->GetWidget(pFormControl, false);
 
   if (pWidget) {
     if (bResetAP) {
       int nFieldType = pWidget->GetFieldType();
       if (nFieldType == FIELDTYPE_COMBOBOX ||
           nFieldType == FIELDTYPE_TEXTFIELD) {
         FX_BOOL bFormatted = FALSE;
         CFX_WideString sValue = pWidget->OnFormat(bFormatted);
-        if (bFormatted)
-          pWidget->ResetAppearance(sValue.c_str(), FALSE);
-        else
-          pWidget->ResetAppearance(nullptr, FALSE);
+        pWidget->ResetAppearance(bFormatted ? &sValue : nullptr, FALSE);
       } else {
         pWidget->ResetAppearance(nullptr, FALSE);
       }
     }
 
     if (bRefresh) {
       CPDFSDK_InterForm* pInterForm = pWidget->GetInterForm();
       CPDFSDK_Document* pDoc = pInterForm->GetDocument();
       pDoc->UpdateAllViews(nullptr, pWidget);
     }
@@ skipping 3142 matching lines @@
   }
 }
 
 void Field::AddField(CPDFSDK_Document* pDocument,
                      int nPageIndex,
                      int nFieldType,
                      const CFX_WideString& sName,
                      const CFX_FloatRect& rcCoords) {
   // Not supported.
 }