// 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_FGAS_FONT_FGAS_STDFONTMGR_H_
#define XFA_FGAS_FONT_FGAS_STDFONTMGR_H_

#include <vector>

#include "core/fxcrt/fx_ext.h"
#include "core/fxge/cfx_fontmapper.h"
#include "core/fxge/fx_freetype.h"
#include "core/fxge/ifx_systemfontinfo.h"
#include "third_party/freetype/include/freetype/fttypes.h"
#include "xfa/fgas/font/fgas_font.h"

#if _FXM_PLATFORM_ == _FXM_PLATFORM_WINDOWS_
int32_t FX_GetSimilarValue(FX_FONTDESCRIPTOR const* pFont,
                           uint32_t dwFontStyles);
FX_FONTDESCRIPTOR const* FX_DefFontMatcher(FX_LPFONTMATCHPARAMS pParams,
                                           const CFX_FontDescriptors& fonts);

class CFGAS_StdFontMgrImp : public IFGAS_FontMgr {
 public:
  explicit CFGAS_StdFontMgrImp(FX_LPEnumAllFonts pEnumerator);
  ~CFGAS_StdFontMgrImp() override;

  // IFGAS_FontMgr:
  CFGAS_GEFont* GetDefFontByCodePage(
      uint16_t wCodePage,
      uint32_t dwFontStyles,
      const FX_WCHAR* pszFontFamily = nullptr) override;
  CFGAS_GEFont* GetDefFontByCharset(
      uint8_t nCharset,
      uint32_t dwFontStyles,
      const FX_WCHAR* pszFontFamily = nullptr) override;
  CFGAS_GEFont* GetDefFontByUnicode(
      FX_WCHAR wUnicode,
      uint32_t dwFontStyles,
      const FX_WCHAR* pszFontFamily = nullptr) override;
  CFGAS_GEFont* GetDefFontByLanguage(
      uint16_t wLanguage,
      uint32_t dwFontStyles,
      const FX_WCHAR* pszFontFamily = nullptr) override;
  CFGAS_GEFont* LoadFont(const FX_WCHAR* pszFontFamily,
                         uint32_t dwFontStyles,
                         uint16_t wCodePage = 0xFFFF) override;
  CFGAS_GEFont* LoadFont(const uint8_t* pBuffer, int32_t iLength) override;
  CFGAS_GEFont* LoadFont(IFX_Stream* pFontStream,
                         const FX_WCHAR* pszFontAlias = nullptr,
                         uint32_t dwFontStyles = 0,
                         uint16_t wCodePage = 0,
                         FX_BOOL bSaveStream = FALSE) override;
  CFGAS_GEFont* LoadFont(CFGAS_GEFont* pSrcFont,
                         uint32_t dwFontStyles,
                         uint16_t wCodePage = 0xFFFF) override;

  void ClearFontCache() override;
  void RemoveFont(CFGAS_GEFont* pFont) override;

 protected:
  void RemoveFont(CFX_MapPtrToPtr& fontMap, CFGAS_GEFont* pFont);
  FX_FONTDESCRIPTOR const* FindFont(const FX_WCHAR* pszFontFamily,
                                    uint32_t dwFontStyles,
                                    uint32_t dwMatchFlags,
                                    uint16_t wCodePage,
                                    uint32_t dwUSB = 999,
                                    FX_WCHAR wUnicode = 0);

  FX_LPEnumAllFonts m_pEnumerator;
  CFX_FontDescriptors m_FontFaces;
  CFX_ArrayTemplate<CFGAS_GEFont*> m_Fonts;
  CFX_MapPtrToPtr m_CPFonts;
  CFX_MapPtrToPtr m_FamilyFonts;
  CFX_MapPtrToPtr m_UnicodeFonts;
  CFX_MapPtrToPtr m_BufferFonts;
  CFX_MapPtrToPtr m_StreamFonts;
  CFX_MapPtrToPtr m_DeriveFonts;
};
uint32_t FX_GetGdiFontStyles(const LOGFONTW& lf);

#else

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

  int32_t m_nFaceIndex;
  CFX_WideString m_wsFaceName;
  CFX_WideStringArray m_wsFamilyNames;
  uint32_t m_dwFontStyles;
  uint32_t m_dwUsb[4];
  uint32_t m_dwCsb[2];
};

typedef CFX_ArrayTemplate<CFX_FontDescriptor*> CFX_FontDescriptors;

struct FX_FontDescriptorInfo {
 public:
  CFX_FontDescriptor* pFont;
  int32_t nPenalty;

  bool operator>(const FX_FontDescriptorInfo& other) const {
    return nPenalty > other.nPenalty;
  }
  bool operator<(const FX_FontDescriptorInfo& other) const {
    return nPenalty < other.nPenalty;
  }
  bool operator==(const FX_FontDescriptorInfo& other) const {
    return nPenalty == other.nPenalty;
  }
};

typedef CFX_ArrayTemplate<FX_FontDescriptorInfo> CFX_FontDescriptorInfos;

struct FX_HandleParentPath {
  FX_HandleParentPath() {}
  FX_HandleParentPath(const FX_HandleParentPath& x) {
    pFileHandle = x.pFileHandle;
    bsParentPath = x.bsParentPath;
  }
  FX_FileHandle* pFileHandle;
  CFX_ByteString bsParentPath;
};

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

  FX_POSITION GetStartPosition();
  IFX_FileAccess* GetNext(FX_POSITION& pos);

 private:
  CFX_ByteString GetNextFile();

  CFX_WideString m_wsNext;
  CFX_ObjectArray<FX_HandleParentPath> m_FolderQueue;
  CFX_ByteStringArray m_FolderPaths;
};

class CFGAS_FontMgrImp : public IFGAS_FontMgr {
 public:
  explicit CFGAS_FontMgrImp(CFX_FontSourceEnum_File* pFontEnum);
  ~CFGAS_FontMgrImp() override;

  // IFGAS_FontMgr:
  CFGAS_GEFont* GetDefFontByCodePage(uint16_t wCodePage,
                                     uint32_t dwFontStyles,
                                     const FX_WCHAR* pszFontFamily) override;
  CFGAS_GEFont* GetDefFontByCharset(uint8_t nCharset,
                                    uint32_t dwFontStyles,
                                    const FX_WCHAR* pszFontFamily) override;
  CFGAS_GEFont* GetDefFontByUnicode(FX_WCHAR wUnicode,
                                    uint32_t dwFontStyles,
                                    const FX_WCHAR* pszFontFamily) override;
  CFGAS_GEFont* GetDefFontByLanguage(uint16_t wLanguage,
                                     uint32_t dwFontStyles,
                                     const FX_WCHAR* pszFontFamily) override;
  CFGAS_GEFont* GetFontByCodePage(uint16_t wCodePage,
                                  uint32_t dwFontStyles,
                                  const FX_WCHAR* pszFontFamily) override;
  CFGAS_GEFont* GetFontByCharset(uint8_t nCharset,
                                 uint32_t dwFontStyles,
                                 const FX_WCHAR* pszFontFamily) override;
  CFGAS_GEFont* GetFontByUnicode(FX_WCHAR wUnicode,
                                 uint32_t dwFontStyles,
                                 const FX_WCHAR* pszFontFamily) override;
  CFGAS_GEFont* GetFontByLanguage(uint16_t wLanguage,
                                  uint32_t dwFontStyles,
                                  const FX_WCHAR* pszFontFamily) override;
  void ClearFontCache() override;
  void RemoveFont(CFGAS_GEFont* pFont) override;

  CFGAS_GEFont* LoadFont(const CFX_WideString& wsFaceName,
                         int32_t iFaceIndex,
                         int32_t* pFaceCount);
  FX_BOOL EnumFonts();
  FX_BOOL EnumFontsFromFontMapper();
  FX_BOOL EnumFontsFromFiles();

 protected:
  void RegisterFace(FXFT_Face pFace,
                    const CFX_WideString* pFaceName);
  void RegisterFaces(IFX_SeekableReadStream* pFontStream,
                     const CFX_WideString* pFaceName);
  void GetNames(const uint8_t* name_table, CFX_WideStringArray& Names);
  std::vector<uint16_t> GetCharsets(FXFT_Face pFace) const;
  void GetUSBCSB(FXFT_Face pFace, uint32_t* USB, uint32_t* CSB);
  uint32_t GetFlags(FXFT_Face pFace);
  FX_BOOL VerifyUnicode(CFX_FontDescriptor* pDesc, FX_WCHAR wcUnicode);
  FX_BOOL VerifyUnicode(CFGAS_GEFont* pFont, FX_WCHAR wcUnicode);
  int32_t IsPartName(const CFX_WideString& Name1, const CFX_WideString& Name2);
  int32_t MatchFonts(CFX_FontDescriptorInfos& MatchedFonts,
                     uint16_t wCodePage,
                     uint32_t dwFontStyles,
                     const CFX_WideString& FontName,
                     FX_WCHAR wcUnicode = 0xFFFE);
  int32_t CalcPenalty(CFX_FontDescriptor* pInstalled,
                      uint16_t wCodePage,
                      uint32_t dwFontStyles,
                      const CFX_WideString& FontName,
                      FX_WCHAR wcUnicode = 0xFFFE);
  FXFT_Face LoadFace(IFX_SeekableReadStream* pFontStream, int32_t iFaceIndex);
  IFX_SeekableReadStream* CreateFontStream(CFX_FontMapper* pFontMapper,
                                           IFX_SystemFontInfo* pSystemFontInfo,
                                           uint32_t index);
  IFX_SeekableReadStream* CreateFontStream(const CFX_ByteString& bsFaceName);

  CFX_FontDescriptors m_InstalledFonts;
  CFX_MapPtrTemplate<uint32_t, CFX_FontDescriptorInfos*> m_Hash2CandidateList;
  CFX_MapPtrTemplate<uint32_t, CFX_ArrayTemplate<CFGAS_GEFont*>*> m_Hash2Fonts;
  CFX_MapPtrTemplate<CFGAS_GEFont*, IFX_SeekableReadStream*> m_IFXFont2FileRead;
  CFX_MapPtrTemplate<FX_WCHAR, CFGAS_GEFont*> m_FailedUnicodes2Nullptr;
  CFX_FontSourceEnum_File* const m_pFontSource;
};
#endif

#endif  // XFA_FGAS_FONT_FGAS_STDFONTMGR_H_