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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_OBJECT_H_ | |
8 #define CORE_FPDFAPI_FPDF_PARSER_INCLUDE_CPDF_OBJECT_H_ | |
9 | |
10 #include <memory> | |
11 #include <set> | |
12 | |
13 #include "core/fxcrt/include/fx_string.h" | |
14 #include "core/fxcrt/include/fx_system.h" | |
15 | |
16 class CPDF_Array; | |
17 class CPDF_Boolean; | |
18 class CPDF_Dictionary; | |
19 class CPDF_Name; | |
20 class CPDF_Null; | |
21 class CPDF_Number; | |
22 class CPDF_Reference; | |
23 class CPDF_Stream; | |
24 class CPDF_String; | |
25 | |
26 class CPDF_Object { | |
27 public: | |
28 static const uint32_t kInvalidObjNum = static_cast<uint32_t>(-1); | |
29 enum Type { | |
30 BOOLEAN = 1, | |
31 NUMBER, | |
32 STRING, | |
33 NAME, | |
34 ARRAY, | |
35 DICTIONARY, | |
36 STREAM, | |
37 NULLOBJ, | |
38 REFERENCE | |
39 }; | |
40 | |
41 virtual Type GetType() const = 0; | |
42 uint32_t GetObjNum() const { return m_ObjNum; } | |
43 uint32_t GetGenNum() const { return m_GenNum; } | |
44 | |
45 // Create a deep copy of the object. | |
46 virtual CPDF_Object* Clone() const = 0; | |
47 // Create a deep copy of the object except any reference object be | |
48 // copied to the object it points to directly. | |
49 virtual CPDF_Object* CloneDirectObject() const; | |
50 virtual CPDF_Object* GetDirect() const; | |
51 | |
52 void Release(); | |
53 | |
54 virtual CFX_ByteString GetString() const; | |
55 virtual CFX_WideString GetUnicodeText() const; | |
56 virtual FX_FLOAT GetNumber() const; | |
57 virtual int GetInteger() const; | |
58 virtual CPDF_Dictionary* GetDict() const; | |
59 | |
60 virtual void SetString(const CFX_ByteString& str); | |
61 | |
62 virtual bool IsArray() const; | |
63 virtual bool IsBoolean() const; | |
64 virtual bool IsDictionary() const; | |
65 virtual bool IsName() const; | |
66 virtual bool IsNumber() const; | |
67 virtual bool IsReference() const; | |
68 virtual bool IsStream() const; | |
69 virtual bool IsString() const; | |
70 | |
71 virtual CPDF_Array* AsArray(); | |
72 virtual const CPDF_Array* AsArray() const; | |
73 virtual CPDF_Boolean* AsBoolean(); | |
74 virtual const CPDF_Boolean* AsBoolean() const; | |
75 virtual CPDF_Dictionary* AsDictionary(); | |
76 virtual const CPDF_Dictionary* AsDictionary() const; | |
77 virtual CPDF_Name* AsName(); | |
78 virtual const CPDF_Name* AsName() const; | |
79 virtual CPDF_Number* AsNumber(); | |
80 virtual const CPDF_Number* AsNumber() const; | |
81 virtual CPDF_Reference* AsReference(); | |
82 virtual const CPDF_Reference* AsReference() const; | |
83 virtual CPDF_Stream* AsStream(); | |
84 virtual const CPDF_Stream* AsStream() const; | |
85 virtual CPDF_String* AsString(); | |
86 virtual const CPDF_String* AsString() const; | |
87 | |
88 protected: | |
89 friend class CPDF_Array; | |
90 friend class CPDF_Dictionary; | |
91 friend class CPDF_Document; | |
92 friend class CPDF_IndirectObjectHolder; | |
93 friend class CPDF_Parser; | |
94 friend class CPDF_Reference; | |
95 friend class CPDF_Stream; | |
96 friend struct std::default_delete<CPDF_Object>; | |
97 | |
98 CPDF_Object() : m_ObjNum(0), m_GenNum(0) {} | |
99 virtual ~CPDF_Object(); | |
100 | |
101 CPDF_Object* CloneObjectNonCyclic(bool bDirect) const; | |
102 | |
103 // Create a deep copy of the object with the option to either | |
104 // copy a reference object or directly copy the object it refers to | |
105 // when |bDirect| is true. | |
106 // Also check cyclic reference against |pVisited|, no copy if it is found. | |
107 // Complex objects should implement their own CloneNonCyclic() | |
108 // function to properly check for possible loop. | |
109 virtual CPDF_Object* CloneNonCyclic( | |
110 bool bDirect, | |
111 std::set<const CPDF_Object*>* pVisited) const; | |
112 | |
113 uint32_t m_ObjNum; | |
114 uint32_t m_GenNum; | |
115 | |
116 private: | |
117 CPDF_Object(const CPDF_Object& src) {} | |
118 }; | |
119 | |
120 inline CPDF_Boolean* ToBoolean(CPDF_Object* obj) { | |
121 return obj ? obj->AsBoolean() : nullptr; | |
122 } | |
123 | |
124 inline const CPDF_Boolean* ToBoolean(const CPDF_Object* obj) { | |
125 return obj ? obj->AsBoolean() : nullptr; | |
126 } | |
127 | |
128 inline CPDF_Number* ToNumber(CPDF_Object* obj) { | |
129 return obj ? obj->AsNumber() : nullptr; | |
130 } | |
131 | |
132 inline const CPDF_Number* ToNumber(const CPDF_Object* obj) { | |
133 return obj ? obj->AsNumber() : nullptr; | |
134 } | |
135 | |
136 inline CPDF_String* ToString(CPDF_Object* obj) { | |
137 return obj ? obj->AsString() : nullptr; | |
138 } | |
139 | |
140 inline const CPDF_String* ToString(const CPDF_Object* obj) { | |
141 return obj ? obj->AsString() : nullptr; | |
142 } | |
143 | |
144 inline CPDF_Name* ToName(CPDF_Object* obj) { | |
145 return obj ? obj->AsName() : nullptr; | |
146 } | |
147 | |
148 inline const CPDF_Name* ToName(const CPDF_Object* obj) { | |
149 return obj ? obj->AsName() : nullptr; | |
150 } | |
151 | |
152 inline CPDF_Array* ToArray(CPDF_Object* obj) { | |
153 return obj ? obj->AsArray() : nullptr; | |
154 } | |
155 | |
156 inline const CPDF_Array* ToArray(const CPDF_Object* obj) { | |
157 return obj ? obj->AsArray() : nullptr; | |
158 } | |
159 | |
160 inline CPDF_Dictionary* ToDictionary(CPDF_Object* obj) { | |
161 return obj ? obj->AsDictionary() : nullptr; | |
162 } | |
163 | |
164 inline const CPDF_Dictionary* ToDictionary(const CPDF_Object* obj) { | |
165 return obj ? obj->AsDictionary() : nullptr; | |
166 } | |
167 inline CPDF_Reference* ToReference(CPDF_Object* obj) { | |
168 return obj ? obj->AsReference() : nullptr; | |
169 } | |
170 | |
171 inline const CPDF_Reference* ToReference(const CPDF_Object* obj) { | |
172 return obj ? obj->AsReference() : nullptr; | |
173 } | |
174 | |
175 inline CPDF_Stream* ToStream(CPDF_Object* obj) { | |
176 return obj ? obj->AsStream() : nullptr; | |
177 } | |
178 | |
179 inline const CPDF_Stream* ToStream(const CPDF_Object* obj) { | |
180 return obj ? obj->AsStream() : nullptr; | |
181 } | |
182 | |
183 #endif // CORE_FPDFAPI_FPDF_PARSER_INCLUDE_CPDF_OBJECT_H_ | |
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