1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
|
// Copyright 2016 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
#ifndef CORE_FPDFAPI_PARSER_CPDF_OBJECT_H_
#define CORE_FPDFAPI_PARSER_CPDF_OBJECT_H_
#include <memory>
#include <set>
#include <type_traits>
#include "core/fxcrt/fx_string.h"
#include "core/fxcrt/fx_system.h"
class CPDF_Array;
class CPDF_Boolean;
class CPDF_Dictionary;
class CPDF_Encryptor;
class CPDF_IndirectObjectHolder;
class CPDF_Name;
class CPDF_Null;
class CPDF_Number;
class CPDF_Reference;
class CPDF_Stream;
class CPDF_String;
class IFX_ArchiveStream;
class CPDF_Object {
public:
static const uint32_t kInvalidObjNum = static_cast<uint32_t>(-1);
enum Type {
kBoolean = 1,
kNumber,
kString,
kName,
kArray,
kDictionary,
kStream,
kNullobj,
kReference
};
virtual ~CPDF_Object();
virtual Type GetType() const = 0;
uint32_t GetObjNum() const { return m_ObjNum; }
void SetObjNum(uint32_t objnum) { m_ObjNum = objnum; }
uint32_t GetGenNum() const { return m_GenNum; }
void SetGenNum(uint32_t gennum) { m_GenNum = gennum; }
bool IsInline() const { return m_ObjNum == 0; }
// Create a deep copy of the object.
virtual std::unique_ptr<CPDF_Object> Clone() const = 0;
// Create a deep copy of the object except any reference object be
// copied to the object it points to directly.
virtual std::unique_ptr<CPDF_Object> CloneDirectObject() const;
virtual CPDF_Object* GetDirect();
virtual const CPDF_Object* GetDirect() const;
virtual ByteString GetString() const;
virtual WideString GetUnicodeText() const;
virtual float GetNumber() const;
virtual int GetInteger() const;
virtual CPDF_Dictionary* GetDict();
virtual const CPDF_Dictionary* GetDict() const;
virtual void SetString(const ByteString& str);
virtual bool IsArray() const;
virtual bool IsBoolean() const;
virtual bool IsDictionary() const;
virtual bool IsName() const;
virtual bool IsNumber() const;
virtual bool IsReference() const;
virtual bool IsStream() const;
virtual bool IsString() const;
virtual bool IsNull() const;
virtual CPDF_Array* AsArray();
virtual const CPDF_Array* AsArray() const;
virtual CPDF_Boolean* AsBoolean();
virtual const CPDF_Boolean* AsBoolean() const;
virtual CPDF_Dictionary* AsDictionary();
virtual const CPDF_Dictionary* AsDictionary() const;
virtual CPDF_Name* AsName();
virtual const CPDF_Name* AsName() const;
virtual CPDF_Number* AsNumber();
virtual const CPDF_Number* AsNumber() const;
virtual CPDF_Reference* AsReference();
virtual const CPDF_Reference* AsReference() const;
virtual CPDF_Stream* AsStream();
virtual const CPDF_Stream* AsStream() const;
virtual CPDF_String* AsString();
virtual const CPDF_String* AsString() const;
virtual bool WriteTo(IFX_ArchiveStream* archive,
const CPDF_Encryptor* encryptor) const = 0;
// Create a deep copy of the object with the option to either
// copy a reference object or directly copy the object it refers to
// when |bDirect| is true.
// Also check cyclic reference against |pVisited|, no copy if it is found.
// Complex objects should implement their own CloneNonCyclic()
// function to properly check for possible loop.
virtual std::unique_ptr<CPDF_Object> CloneNonCyclic(
bool bDirect,
std::set<const CPDF_Object*>* pVisited) const;
// Return a reference to itself.
// The object must be direct (!IsInlined).
virtual std::unique_ptr<CPDF_Object> MakeReference(
CPDF_IndirectObjectHolder* holder) const;
protected:
CPDF_Object() = default;
CPDF_Object(const CPDF_Object& src) = delete;
std::unique_ptr<CPDF_Object> CloneObjectNonCyclic(bool bDirect) const;
uint32_t m_ObjNum = 0;
uint32_t m_GenNum = 0;
};
template <typename T>
struct CanInternStrings {
static const bool value = std::is_same<T, CPDF_Array>::value ||
std::is_same<T, CPDF_Dictionary>::value ||
std::is_same<T, CPDF_Name>::value ||
std::is_same<T, CPDF_String>::value;
};
#endif // CORE_FPDFAPI_PARSER_CPDF_OBJECT_H_
|
