QPDFValue.hh
3.27 KB
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
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
#ifndef QPDFVALUE_HH
#define QPDFVALUE_HH
#include <qpdf/Constants.h>
#include <qpdf/DLL.h>
#include <qpdf/JSON.hh>
#include <qpdf/QPDFObjGen.hh>
#include <qpdf/Types.h>
#include <string>
#include <string_view>
#include <variant>
class QPDF;
class QPDFObjectHandle;
class QPDFObject;
class QPDFValue: public std::enable_shared_from_this<QPDFValue>
{
friend class QPDFObject;
public:
virtual ~QPDFValue() = default;
virtual std::shared_ptr<QPDFObject> copy(bool shallow = false) = 0;
virtual std::string unparse() = 0;
virtual void writeJSON(int json_version, JSON::Writer& p) = 0;
struct JSON_Descr
{
JSON_Descr(std::shared_ptr<std::string> input, std::string const& object) :
input(input),
object(object)
{
}
std::shared_ptr<std::string> input;
std::string object;
};
struct ChildDescr
{
ChildDescr(
std::shared_ptr<QPDFValue> parent,
std::string_view const& static_descr,
std::string var_descr) :
parent(parent),
static_descr(static_descr),
var_descr(var_descr)
{
}
std::weak_ptr<QPDFValue> parent;
std::string_view const& static_descr;
std::string var_descr;
};
using Description = std::variant<std::string, JSON_Descr, ChildDescr>;
virtual void
setDescription(QPDF* qpdf_p, std::shared_ptr<Description>& description, qpdf_offset_t offset)
{
qpdf = qpdf_p;
object_description = description;
setParsedOffset(offset);
}
void
setDefaultDescription(QPDF* a_qpdf, QPDFObjGen const& a_og)
{
qpdf = a_qpdf;
og = a_og;
}
void
setChildDescription(
QPDF* a_qpdf,
std::shared_ptr<QPDFValue> parent,
std::string_view const& static_descr,
std::string var_descr)
{
object_description =
std::make_shared<Description>(ChildDescr(parent, static_descr, var_descr));
qpdf = a_qpdf;
}
std::string getDescription();
bool
hasDescription()
{
return object_description || og.isIndirect();
}
void
setParsedOffset(qpdf_offset_t offset)
{
if (parsed_offset < 0) {
parsed_offset = offset;
}
}
qpdf_offset_t
getParsedOffset()
{
return parsed_offset;
}
QPDF*
getQPDF()
{
return qpdf;
}
QPDFObjGen
getObjGen()
{
return og;
}
virtual void
disconnect()
{
}
virtual std::string
getStringValue() const
{
return "";
}
protected:
QPDFValue() = default;
QPDFValue(qpdf_object_type_e type_code) :
type_code(type_code)
{
}
QPDFValue(qpdf_object_type_e type_code, QPDF* qpdf, QPDFObjGen og) :
type_code(type_code),
qpdf(qpdf),
og(og)
{
}
static std::shared_ptr<QPDFObject> do_create(QPDFValue*);
private:
QPDFValue(QPDFValue const&) = delete;
QPDFValue& operator=(QPDFValue const&) = delete;
std::shared_ptr<Description> object_description;
const qpdf_object_type_e type_code{::ot_uninitialized};
protected:
QPDF* qpdf{nullptr};
QPDFObjGen og{};
qpdf_offset_t parsed_offset{-1};
};
#endif // QPDFVALUE_HH