// Copyright 2017 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 CORE_FPDFAPI_FONT_CPDF_TOUNICODEMAP_H_
#define CORE_FPDFAPI_FONT_CPDF_TOUNICODEMAP_H_

#include <map>

#include "core/fpdfapi/parser/cpdf_stream.h"
#include "core/fxcrt/cfx_unowned_ptr.h"
#include "core/fxcrt/cfx_widetextbuf.h"

class CPDF_CID2UnicodeMap;

class CPDF_ToUnicodeMap {
 public:
  CPDF_ToUnicodeMap();
  ~CPDF_ToUnicodeMap();

  void Load(CPDF_Stream* pStream);

  WideString Lookup(uint32_t charcode) const;
  uint32_t ReverseLookup(wchar_t unicode) const;

 private:
  friend class cpdf_tounicodemap_StringToCode_Test;
  friend class cpdf_tounicodemap_StringToWideString_Test;

  static uint32_t StringToCode(const ByteStringView& str);
  static WideString StringToWideString(const ByteStringView& str);

  uint32_t GetUnicode();

  std::map<uint32_t, uint32_t> m_Map;
  CFX_UnownedPtr<CPDF_CID2UnicodeMap> m_pBaseMap;
  CFX_WideTextBuf m_MultiCharBuf;
};

#endif  // CORE_FPDFAPI_FONT_CPDF_TOUNICODEMAP_H_