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_FPDFAPI_PARSER_CPDF_REFERENCE_H_ 8 #define CORE_FPDFAPI_PARSER_CPDF_REFERENCE_H_ 9 10 #include <memory> 11 #include <set> 12 13 #include "core/fpdfapi/parser/cpdf_object.h" 14 #include "core/fxcrt/unowned_ptr.h" 15 16 class CPDF_IndirectObjectHolder; 17 18 class CPDF_Reference : public CPDF_Object { 19 public: 20 CPDF_Reference(CPDF_IndirectObjectHolder* pDoc, uint32_t objnum); 21 ~CPDF_Reference() override; 22 23 // CPDF_Object: 24 Type GetType() const override; 25 std::unique_ptr<CPDF_Object> Clone() const override; 26 CPDF_Object* GetDirect() const override; 27 ByteString GetString() const override; 28 float GetNumber() const override; 29 int GetInteger() const override; 30 CPDF_Dictionary* GetDict() const override; 31 bool IsReference() const override; 32 CPDF_Reference* AsReference() override; 33 const CPDF_Reference* AsReference() const override; 34 bool WriteTo(IFX_ArchiveStream* archive) const override; 35 GetObjList()36 CPDF_IndirectObjectHolder* GetObjList() const { return m_pObjList.Get(); } GetRefObjNum()37 uint32_t GetRefObjNum() const { return m_RefObjNum; } 38 void SetRef(CPDF_IndirectObjectHolder* pDoc, uint32_t objnum); 39 40 protected: 41 std::unique_ptr<CPDF_Object> CloneNonCyclic( 42 bool bDirect, 43 std::set<const CPDF_Object*>* pVisited) const override; 44 CPDF_Object* SafeGetDirect() const; 45 46 UnownedPtr<CPDF_IndirectObjectHolder> m_pObjList; 47 uint32_t m_RefObjNum; 48 }; 49 ToReference(CPDF_Object * obj)50inline CPDF_Reference* ToReference(CPDF_Object* obj) { 51 return obj ? obj->AsReference() : nullptr; 52 } 53 ToReference(const CPDF_Object * obj)54inline const CPDF_Reference* ToReference(const CPDF_Object* obj) { 55 return obj ? obj->AsReference() : nullptr; 56 } 57 58 #endif // CORE_FPDFAPI_PARSER_CPDF_REFERENCE_H_ 59