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#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()) {
this->m->embedded_files =
std::make_shared<QPDFNameTreeObjectHelper>(
embedded_files, qpdf);
}
}
}
QPDFEmbeddedFileDocumentHelper::Members::Members()
{
}
bool
QPDFEmbeddedFileDocumentHelper::hasEmbeddedFiles() const
{
return (this->m->embedded_files.get() != nullptr);
}
void
QPDFEmbeddedFileDocumentHelper::initEmbeddedFiles()
{
if (hasEmbeddedFiles()) {
return;
}
auto root = qpdf.getRoot();
auto names = root.getKey("/Names");
if (!names.isDictionary()) {
names = QPDFObjectHandle::newDictionary();
root.replaceKey("/Names", names);
}
auto embedded_files = names.getKey("/EmbeddedFiles");
if (!embedded_files.isDictionary()) {
auto nth = QPDFNameTreeObjectHelper::newEmpty(this->qpdf);
names.replaceKey("/EmbeddedFiles", nth.getObjectHandle());
this->m->embedded_files =
std::make_shared<QPDFNameTreeObjectHelper>(nth);
}
}
std::shared_ptr<QPDFFileSpecObjectHelper>
QPDFEmbeddedFileDocumentHelper::getEmbeddedFile(std::string const& name)
{
std::shared_ptr<QPDFFileSpecObjectHelper> result;
if (this->m->embedded_files) {
auto i = this->m->embedded_files->find(name);
if (i != this->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 (this->m->embedded_files) {
for (auto const& i : *(this->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();
this->m->embedded_files->insert(name, fs.getObjectHandle());
}
bool
QPDFEmbeddedFileDocumentHelper::removeEmbeddedFile(std::string const& name)
{
if (!hasEmbeddedFiles()) {
return false;
}
auto iter = this->m->embedded_files->find(name);
if (iter == this->m->embedded_files->end()) {
return false;
}
auto oh = iter->second;
iter.remove();
if (oh.isIndirect()) {
this->qpdf.replaceObject(oh.getObjGen(), QPDFObjectHandle::newNull());
}
return true;
}
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