Pass CFX_WideString further down widget callers

fpdfsdk/cpdfsdk_interform.cpp

 // Copyright 2016 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/cpdfsdk_interform.h"
 
 #include <algorithm>
 #include <memory>
@@ skipping 305 matching lines @@
           bFormatted = TRUE;
         }
       }
     }
   }
 
   return sValue;
 }
 
 void CPDFSDK_InterForm::ResetFieldAppearance(CPDF_FormField* pFormField,
-                                             const FX_WCHAR* sValue,
+                                             const CFX_WideString* sValue,
                                              FX_BOOL bValueChanged) {
   for (int i = 0, sz = pFormField->CountControls(); i < sz; i++) {
     CPDF_FormControl* pFormCtrl = pFormField->GetControl(i);
     ASSERT(pFormCtrl);
     if (CPDFSDK_Widget* pWidget = GetWidget(pFormCtrl, false))
       pWidget->ResetAppearance(sValue, bValueChanged);
   }
 }
 
 void CPDFSDK_InterForm::UpdateField(CPDF_FormField* pFormField) {
@@ skipping 290 matching lines @@
 
 void CPDFSDK_InterForm::AfterValueChange(CPDF_FormField* pField) {
 #ifdef PDF_ENABLE_XFA
   SynchronizeField(pField, FALSE);
 #endif  // PDF_ENABLE_XFA
   int nType = pField->GetFieldType();
   if (nType == FIELDTYPE_COMBOBOX || nType == FIELDTYPE_TEXTFIELD) {
     OnCalculate(pField);
     FX_BOOL bFormatted = FALSE;
     CFX_WideString sValue = OnFormat(pField, bFormatted);
-    ResetFieldAppearance(pField, bFormatted ? sValue.c_str() : nullptr, TRUE);
+    ResetFieldAppearance(pField, bFormatted ? &sValue : nullptr, TRUE);
     UpdateField(pField);
   }
 }
 
 int CPDFSDK_InterForm::BeforeSelectionChange(CPDF_FormField* pField,
                                              const CFX_WideString& csValue) {
   if (pField->GetFieldType() != FIELDTYPE_LISTBOX)
     return 0;
 
   if (!OnKeyStrokeCommit(pField, csValue))
@@ skipping 69 matching lines @@
   }
 }
 
 FX_COLORREF CPDFSDK_InterForm::GetHighlightColor(int nFieldType) {
   if (nFieldType < 0 || nFieldType > kNumFieldTypes)
     return FXSYS_RGB(255, 255, 255);
   if (nFieldType == 0)
     return m_aHighlightColor[0];
   return m_aHighlightColor[nFieldType - 1];
 }