1 // Copyright 2016 The PDFium Authors 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_FPDFAPI_PAGE_CPDF_OCCONTEXT_H_ 8 #define CORE_FPDFAPI_PAGE_CPDF_OCCONTEXT_H_ 9 10 #include <functional> 11 #include <map> 12 13 #include "core/fxcrt/bytestring.h" 14 #include "core/fxcrt/retain_ptr.h" 15 #include "core/fxcrt/unowned_ptr.h" 16 17 class CPDF_Array; 18 class CPDF_Dictionary; 19 class CPDF_Document; 20 class CPDF_PageObject; 21 22 class CPDF_OCContext final : public Retainable { 23 public: 24 enum UsageType { kView = 0, kDesign, kPrint, kExport }; 25 26 CONSTRUCT_VIA_MAKE_RETAIN; 27 28 bool CheckOCGDictVisible(const CPDF_Dictionary* pOCGDict) const; 29 bool CheckPageObjectVisible(const CPDF_PageObject* pObj) const; 30 31 private: 32 CPDF_OCContext(CPDF_Document* pDoc, UsageType eUsageType); 33 ~CPDF_OCContext() override; 34 35 bool LoadOCGStateFromConfig(const ByteString& csConfig, 36 const CPDF_Dictionary* pOCGDict) const; 37 bool LoadOCGState(const CPDF_Dictionary* pOCGDict) const; 38 bool GetOCGVisible(const CPDF_Dictionary* pOCGDict) const; 39 bool GetOCGVE(const CPDF_Array* pExpression, int nLevel) const; 40 bool LoadOCMDState(const CPDF_Dictionary* pOCMDDict) const; 41 42 UnownedPtr<CPDF_Document> const m_pDocument; 43 const UsageType m_eUsageType; 44 mutable std::map<RetainPtr<const CPDF_Dictionary>, bool, std::less<>> 45 m_OGCStateCache; 46 }; 47 48 #endif // CORE_FPDFAPI_PAGE_CPDF_OCCONTEXT_H_ 49