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
|
#include <qpdf/QPDFEmbeddedFileDocumentHelper.hh>
// File attachments are stored in the /EmbeddedFiles (name tree) key of the /Names dictionary from
// the document catalog. Each entry points to a /FileSpec, which in turn points to one more Embedded
// File Streams. Note that file specs can appear in other places as well, such as file attachment
// annotations, among others.
//
// root -> /Names -> /EmbeddedFiles = name tree
// filename -> filespec
// <<
// /Desc ()
// /EF <<
// /F x 0 R
// /UF x 0 R
// >>
// /F (name)
// /UF (name)
// /Type /Filespec
// >>
// x 0 obj
// <<
// /Type /EmbeddedFile
// /DL filesize % not in spec?
// /Params <<
// /CheckSum <md5>
// /CreationDate (D:yyyymmddhhmmss{-hh'mm'|+hh'mm'|Z})
// /ModDate (D:yyyymmddhhmmss-hh'mm')
// /Size filesize
// /Subtype /mime#2ftype
// >>
// >>
QPDFEmbeddedFileDocumentHelper::QPDFEmbeddedFileDocumentHelper(QPDF& qpdf) :
QPDFDocumentHelper(qpdf),
m(new Members())
{
auto root = qpdf.getRoot();
auto names = root.getKey("/Names");
if (names.isDictionary()) {
auto embedded_files = names.getKey("/EmbeddedFiles");
if (embedded_files.isDictionary()) {
m->embedded_files = std::make_shared<QPDFNameTreeObjectHelper>(embedded_files, qpdf);
}
}
}
bool
QPDFEmbeddedFileDocumentHelper::hasEmbeddedFiles() const
{
return (m->embedded_files != nullptr);
}
void
QPDFEmbeddedFileDocumentHelper::initEmbeddedFiles()
{
if (hasEmbeddedFiles()) {
return;
}
auto root = qpdf.getRoot();
auto names = root.getKey("/Names");
if (!names.isDictionary()) {
names = root.replaceKeyAndGetNew("/Names", QPDFObjectHandle::newDictionary());
}
auto embedded_files = names.getKey("/EmbeddedFiles");
if (!embedded_files.isDictionary()) {
auto nth = QPDFNameTreeObjectHelper::newEmpty(this->qpdf);
names.replaceKey("/EmbeddedFiles", nth.getObjectHandle());
m->embedded_files = std::make_shared<QPDFNameTreeObjectHelper>(nth);
}
}
std::shared_ptr<QPDFFileSpecObjectHelper>
QPDFEmbeddedFileDocumentHelper::getEmbeddedFile(std::string const& name)
{
std::shared_ptr<QPDFFileSpecObjectHelper> result;
if (m->embedded_files) {
auto i = m->embedded_files->find(name);
if (i != m->embedded_files->end()) {
result = std::make_shared<QPDFFileSpecObjectHelper>(i->second);
}
}
return result;
}
std::map<std::string, std::shared_ptr<QPDFFileSpecObjectHelper>>
QPDFEmbeddedFileDocumentHelper::getEmbeddedFiles()
{
std::map<std::string, std::shared_ptr<QPDFFileSpecObjectHelper>> result;
if (m->embedded_files) {
for (auto const& i: *(m->embedded_files)) {
result[i.first] = std::make_shared<QPDFFileSpecObjectHelper>(i.second);
}
}
return result;
}
void
QPDFEmbeddedFileDocumentHelper::replaceEmbeddedFile(
std::string const& name, QPDFFileSpecObjectHelper const& fs)
{
initEmbeddedFiles();
m->embedded_files->insert(name, fs.getObjectHandle());
}
bool
QPDFEmbeddedFileDocumentHelper::removeEmbeddedFile(std::string const& name)
{
if (!hasEmbeddedFiles()) {
return false;
}
auto iter = m->embedded_files->find(name);
if (iter == m->embedded_files->end()) {
return false;
}
auto oh = iter->second;
iter.remove();
if (oh.isIndirect()) {
this->qpdf.replaceObject(oh.getObjGen(), QPDFObjectHandle::newNull());
}
return true;
}
|
