cpdf_fontglobals.h

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// Copyright 2017 The PDFium Authors
// 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_FONTGLOBALS_H_
#define CORE_FPDFAPI_FONT_CPDF_FONTGLOBALS_H_
 
#include <array>
#include <functional>
#include <map>
#include <memory>
 
#include "core/fpdfapi/cmaps/fpdf_cmaps.h"
#include "core/fpdfapi/font/cpdf_cidfont.h"
#include "core/fxcrt/raw_span.h"
#include "core/fxcrt/retain_ptr.h"
#include "core/fxcrt/span.h"
#include "core/fxge/cfx_fontmapper.h"
 
class CFX_StockFontArray;
class CPDF_Font;
 
class CPDF_FontGlobals {
 public:
  // Per-process singleton which must be managed by callers.
  static void Create();
  static void Destroy();
  static CPDF_FontGlobals* GetInstance();
 
  // Caller must load the maps before using font globals.
  void LoadEmbeddedMaps();
 
  void Clear(CPDF_Document* pDoc);
  RetainPtr<CPDF_Font> Find(CPDF_Document* pDoc,
                            CFX_FontMapper::StandardFont index);
  void Set(CPDF_Document* pDoc,
           CFX_FontMapper::StandardFont index,
           RetainPtr<CPDF_Font> pFont);
 
  void SetEmbeddedCharset(CIDSet idx, pdfium::span<const fxcmap::CMap> map) {
    m_EmbeddedCharsets[idx] = map;
  }
  pdfium::span<const fxcmap::CMap> GetEmbeddedCharset(CIDSet idx) const {
    return m_EmbeddedCharsets[idx];
  }
  void SetEmbeddedToUnicode(CIDSet idx, pdfium::span<const uint16_t> map) {
    m_EmbeddedToUnicodes[idx] = map;
  }
  pdfium::span<const uint16_t> GetEmbeddedToUnicode(CIDSet idx) {
    return m_EmbeddedToUnicodes[idx];
  }
 
  RetainPtr<const CPDF_CMap> GetPredefinedCMap(const ByteString& name);
  CPDF_CID2UnicodeMap* GetCID2UnicodeMap(CIDSet charset);
 
 private:
  CPDF_FontGlobals();
  ~CPDF_FontGlobals();
 
  void LoadEmbeddedGB1CMaps();
  void LoadEmbeddedCNS1CMaps();
  void LoadEmbeddedJapan1CMaps();
  void LoadEmbeddedKorea1CMaps();
 
  std::map<ByteString, RetainPtr<const CPDF_CMap>> m_CMaps;
  std::array<std::unique_ptr<CPDF_CID2UnicodeMap>, CIDSET_NUM_SETS>
      m_CID2UnicodeMaps;
  std::array<pdfium::raw_span<const fxcmap::CMap>, CIDSET_NUM_SETS>
      m_EmbeddedCharsets;
  std::array<pdfium::raw_span<const uint16_t>, CIDSET_NUM_SETS>
      m_EmbeddedToUnicodes;
  std::map<UnownedPtr<CPDF_Document>,
           std::unique_ptr<CFX_StockFontArray>,
           std::less<>>
      m_StockMap;
};
 
#endif  // CORE_FPDFAPI_FONT_CPDF_FONTGLOBALS_H_