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1 // Copyright 2016 PDFium Authors. All rights reserved. | 1 // Copyright 2016 PDFium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com | 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com |
6 | 6 |
7 #ifndef CORE_FPDFAPI_FPDF_PARSER_CPDF_REFERENCE_H_ | 7 #ifndef CORE_FPDFAPI_FPDF_PARSER_CPDF_REFERENCE_H_ |
8 #define CORE_FPDFAPI_FPDF_PARSER_CPDF_REFERENCE_H_ | 8 #define CORE_FPDFAPI_FPDF_PARSER_CPDF_REFERENCE_H_ |
9 | 9 |
10 #include <set> | 10 #include <set> |
11 | 11 |
12 #include "core/fpdfapi/fpdf_parser/cpdf_object.h" | 12 #include "core/fpdfapi/fpdf_parser/cpdf_object.h" |
13 | 13 |
14 class CPDF_IndirectObjectHolder; | 14 class CPDF_IndirectObjectHolder; |
15 | 15 |
16 class CPDF_Reference : public CPDF_Object { | 16 class CPDF_Reference : public CPDF_Object { |
17 public: | 17 public: |
18 CPDF_Reference(CPDF_IndirectObjectHolder* pDoc, int objnum); | 18 CPDF_Reference(CPDF_IndirectObjectHolder* pDoc, int objnum); |
19 | 19 |
20 // CPDF_Object. | 20 // CPDF_Object. |
21 Type GetType() const override; | 21 Type GetType() const override; |
22 CPDF_Object* Clone() const override; | 22 CPDF_Object* Clone() const override; |
23 CPDF_Object* GetDirect() const override; | 23 CPDF_Object* GetDirect() const override; |
24 CFX_ByteString GetString() const override; | 24 CFX_ByteString GetString() const override; |
25 FX_FLOAT GetNumber() const override; | 25 FX_FLOAT GetNumber() const override; |
26 int GetInteger() const override; | 26 int GetInteger() const override; |
27 CPDF_Dictionary* GetDict() const override; | 27 CPDF_Dictionary* GetDict() const override; |
28 | |
29 // TODO(weili): check whether GetUnicodeText() and GetArray() are needed. | |
30 bool IsReference() const override; | 28 bool IsReference() const override; |
31 CPDF_Reference* AsReference() override; | 29 CPDF_Reference* AsReference() override; |
32 const CPDF_Reference* AsReference() const override; | 30 const CPDF_Reference* AsReference() const override; |
33 | 31 |
34 CPDF_IndirectObjectHolder* GetObjList() const { return m_pObjList; } | 32 CPDF_IndirectObjectHolder* GetObjList() const { return m_pObjList; } |
35 uint32_t GetRefObjNum() const { return m_RefObjNum; } | 33 uint32_t GetRefObjNum() const { return m_RefObjNum; } |
36 | 34 |
37 void SetRef(CPDF_IndirectObjectHolder* pDoc, uint32_t objnum); | 35 void SetRef(CPDF_IndirectObjectHolder* pDoc, uint32_t objnum); |
38 | 36 |
39 protected: | 37 protected: |
40 ~CPDF_Reference() override; | 38 ~CPDF_Reference() override; |
| 39 |
41 CPDF_Object* CloneNonCyclic( | 40 CPDF_Object* CloneNonCyclic( |
42 bool bDirect, | 41 bool bDirect, |
43 std::set<const CPDF_Object*>* pVisited) const override; | 42 std::set<const CPDF_Object*>* pVisited) const override; |
44 CPDF_Object* SafeGetDirect() const { | 43 |
45 CPDF_Object* obj = GetDirect(); | 44 CPDF_Object* SafeGetDirect() const; |
46 if (!obj || obj->IsReference()) | |
47 return nullptr; | |
48 return obj; | |
49 } | |
50 | 45 |
51 CPDF_IndirectObjectHolder* m_pObjList; | 46 CPDF_IndirectObjectHolder* m_pObjList; |
52 uint32_t m_RefObjNum; | 47 uint32_t m_RefObjNum; |
53 }; | 48 }; |
54 | 49 |
55 #endif // CORE_FPDFAPI_FPDF_PARSER_CPDF_REFERENCE_H_ | 50 #endif // CORE_FPDFAPI_FPDF_PARSER_CPDF_REFERENCE_H_ |
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