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_FPDF_PARSER_INCLUDE_CPDF_REFERENCE_H_ 8 #define CORE_FPDFAPI_FPDF_PARSER_INCLUDE_CPDF_REFERENCE_H_ 9 10 #include "core/fpdfapi/fpdf_parser/include/cpdf_object.h" 11 12 class CPDF_IndirectObjectHolder; 13 14 class CPDF_Reference : public CPDF_Object { 15 public: 16 CPDF_Reference(CPDF_IndirectObjectHolder* pDoc, int objnum); 17 18 // CPDF_Object. 19 Type GetType() const override; 20 CPDF_Object* Clone(FX_BOOL bDirect = FALSE) const override; 21 CPDF_Object* GetDirect() const override; 22 CFX_ByteString GetString() const override; 23 FX_FLOAT GetNumber() const override; 24 int GetInteger() const override; 25 CPDF_Dictionary* GetDict() const override; 26 27 // TODO(weili): check whether GetUnicodeText() and GetArray() are needed. 28 bool IsReference() const override; 29 CPDF_Reference* AsReference() override; 30 const CPDF_Reference* AsReference() const override; 31 GetObjList()32 CPDF_IndirectObjectHolder* GetObjList() const { return m_pObjList; } GetRefObjNum()33 uint32_t GetRefObjNum() const { return m_RefObjNum; } 34 35 void SetRef(CPDF_IndirectObjectHolder* pDoc, uint32_t objnum); 36 37 protected: 38 ~CPDF_Reference() override; SafeGetDirect()39 CPDF_Object* SafeGetDirect() const { 40 CPDF_Object* obj = GetDirect(); 41 if (!obj || obj->IsReference()) 42 return nullptr; 43 return obj; 44 } 45 46 CPDF_IndirectObjectHolder* m_pObjList; 47 uint32_t m_RefObjNum; 48 }; 49 50 #endif // CORE_FPDFAPI_FPDF_PARSER_INCLUDE_CPDF_REFERENCE_H_ 51