Pass objects instead of strings for undo/redo records.

xfa/fwl/lightwidget/cfwl_edit.h

 // 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
 
 #ifndef XFA_FWL_LIGHTWIDGET_CFWL_EDIT_H_
 #define XFA_FWL_LIGHTWIDGET_CFWL_EDIT_H_
 
 #include <vector>
 
 #include "xfa/fwl/lightwidget/cfwl_widget.h"
 
 class CFWL_WidgetProperties;
+class IFDE_TxtEdtDoRecord;
 
 class CFWL_Edit : public CFWL_Widget {
  public:
   static CFWL_Edit* Create();
   FWL_Error Initialize(const CFWL_WidgetProperties* pProperties = NULL);
   FWL_Error SetText(const CFX_WideString& wsText);
   int32_t GetTextLength() const;
   FWL_Error GetText(CFX_WideString& wsText,
                     int32_t nStart = 0,
                     int32_t nCount = -1) const;
   FWL_Error ClearText();
   int32_t GetCaretPos() const;
   int32_t SetCaretPos(int32_t nIndex, FX_BOOL bBefore = TRUE);
   int32_t AddSelRange(int32_t nStart, int32_t nCount = -1);
   int32_t CountSelRanges();
   int32_t GetSelRange(int32_t nIndex, int32_t& nStart);
   FWL_Error ClearSelections();
   int32_t GetLimit();
   FWL_Error SetLimit(int32_t nLimit);
   FWL_Error SetAliasChar(FX_WCHAR wAlias);
   FWL_Error SetFormatString(const CFX_WideString& wsFormat);
   FWL_Error Insert(int32_t nStart, const FX_WCHAR* lpText, int32_t nLen);
   FWL_Error DeleteSelections();
   FWL_Error DeleteRange(int32_t nStart, int32_t nCount = -1);
   FWL_Error Replace(int32_t nStart,
                     int32_t nLen,
                     const CFX_WideStringC& wsReplace);
   FWL_Error DoClipboard(int32_t iCmd);
-  FX_BOOL Redo(const CFX_ByteStringC& bsRecord);
-  FX_BOOL Undo(const CFX_ByteStringC& bsRecord);
+  FX_BOOL Redo(const IFDE_TxtEdtDoRecord* pRecord);
+  FX_BOOL Undo(const IFDE_TxtEdtDoRecord* pRecord);
   FWL_Error SetTabWidth(FX_FLOAT fTabWidth, FX_BOOL bEquidistant);
   FWL_Error SetNumberRange(int32_t iMin, int32_t iMax);
   FWL_Error SetBackColor(uint32_t dwColor);
   FWL_Error SetFont(const CFX_WideString& wsFont, FX_FLOAT fSize);
   FX_BOOL CanUndo();
   FX_BOOL CanRedo();
   FX_BOOL Undo();
   FX_BOOL Redo();
   FX_BOOL Copy(CFX_WideString& wsCopy);
   FX_BOOL Cut(CFX_WideString& wsCut);
   FX_BOOL Paste(const CFX_WideString& wsPaste);
   FX_BOOL Delete();
   void SetScrollOffset(FX_FLOAT fScrollOffset);
   FX_BOOL GetSuggestWords(CFX_PointF pointf,
                           std::vector<CFX_ByteString>& sSuggest);
   FX_BOOL ReplaceSpellCheckWord(CFX_PointF pointf,
                                 const CFX_ByteStringC& bsReplace);
   CFWL_Edit();
   virtual ~CFWL_Edit();
 };
 
 #endif  // XFA_FWL_LIGHTWIDGET_CFWL_EDIT_H_