1 // Copyright 2016 PDFium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com 6 7 #ifndef CORE_FPDFDOC_CPDF_OCCONTEXT_H_ 8 #define CORE_FPDFDOC_CPDF_OCCONTEXT_H_ 9 10 #include <unordered_map> 11 12 #include "core/fxcrt/cfx_retain_ptr.h" 13 #include "core/fxcrt/fx_string.h" 14 15 class CPDF_Array; 16 class CPDF_Dictionary; 17 class CPDF_Document; 18 class CPDF_PageObject; 19 20 class CPDF_OCContext : public CFX_Retainable { 21 public: 22 template <typename T, typename... Args> 23 friend CFX_RetainPtr<T> pdfium::MakeRetain(Args&&... args); 24 25 enum UsageType { View = 0, Design, Print, Export }; 26 27 bool CheckOCGVisible(const CPDF_Dictionary* pOCGDict); 28 bool CheckObjectVisible(const CPDF_PageObject* pObj); 29 30 private: 31 CPDF_OCContext(CPDF_Document* pDoc, UsageType eUsageType); 32 ~CPDF_OCContext() override; 33 34 bool LoadOCGStateFromConfig(const CFX_ByteString& csConfig, 35 const CPDF_Dictionary* pOCGDict) const; 36 bool LoadOCGState(const CPDF_Dictionary* pOCGDict) const; 37 bool GetOCGVisible(const CPDF_Dictionary* pOCGDict); 38 bool GetOCGVE(CPDF_Array* pExpression, int nLevel); 39 bool LoadOCMDState(const CPDF_Dictionary* pOCMDDict); 40 41 CPDF_Document* const m_pDocument; 42 const UsageType m_eUsageType; 43 std::unordered_map<const CPDF_Dictionary*, bool> m_OCGStates; 44 }; 45 46 #endif // CORE_FPDFDOC_CPDF_OCCONTEXT_H_ 47
