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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 <set> | |
11 | |
12 #include "core/fpdfapi/fpdf_parser/include/cpdf_object.h" | |
13 | |
14 class CPDF_IndirectObjectHolder; | |
15 | |
16 class CPDF_Reference : public CPDF_Object { | |
17 public: | |
18 CPDF_Reference(CPDF_IndirectObjectHolder* pDoc, int objnum); | |
19 | |
20 // CPDF_Object. | |
21 Type GetType() const override; | |
22 CPDF_Object* Clone() const override; | |
23 CPDF_Object* GetDirect() const override; | |
24 CFX_ByteString GetString() const override; | |
25 FX_FLOAT GetNumber() const override; | |
26 int GetInteger() const override; | |
27 CPDF_Dictionary* GetDict() const override; | |
28 | |
29 // TODO(weili): check whether GetUnicodeText() and GetArray() are needed. | |
30 bool IsReference() const override; | |
31 CPDF_Reference* AsReference() override; | |
32 const CPDF_Reference* AsReference() const override; | |
33 | |
34 CPDF_IndirectObjectHolder* GetObjList() const { return m_pObjList; } | |
35 uint32_t GetRefObjNum() const { return m_RefObjNum; } | |
36 | |
37 void SetRef(CPDF_IndirectObjectHolder* pDoc, uint32_t objnum); | |
38 | |
39 protected: | |
40 ~CPDF_Reference() override; | |
41 CPDF_Object* CloneNonCyclic( | |
42 bool bDirect, | |
43 std::set<const CPDF_Object*>* pVisited) const override; | |
44 CPDF_Object* SafeGetDirect() const { | |
45 CPDF_Object* obj = GetDirect(); | |
46 if (!obj || obj->IsReference()) | |
47 return nullptr; | |
48 return obj; | |
49 } | |
50 | |
51 CPDF_IndirectObjectHolder* m_pObjList; | |
52 uint32_t m_RefObjNum; | |
53 }; | |
54 | |
55 #endif // CORE_FPDFAPI_FPDF_PARSER_INCLUDE_CPDF_REFERENCE_H_ | |
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