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#ifndef QPDFVALUEPROXY_HH
#define QPDFVALUEPROXY_HH
#include <qpdf/Constants.h>
#include <qpdf/DLL.h>
#include <qpdf/JSON.hh>
#include <qpdf/QPDFValue.hh>
#include <qpdf/Types.h>
#include <string>
class QPDF;
class QPDFObjectHandle;
class QPDFValueProxy
{
friend class QPDFValue;
public:
QPDFValueProxy() = default;
std::shared_ptr<QPDFValueProxy>
shallowCopy()
{
return value->shallowCopy();
}
std::string
unparse()
{
return value->unparse();
}
JSON
getJSON(int json_version)
{
return value->getJSON(json_version);
}
// Return a unique type code for the object
qpdf_object_type_e
getTypeCode() const
{
return value->type_code;
}
// Return a string literal that describes the type, useful for
// debugging and testing
char const*
getTypeName() const
{
return value->type_name;
}
QPDF*
getQPDF() const
{
return value->qpdf;
}
QPDFObjGen
getObjGen() const
{
return value->og;
}
void
setDescription(QPDF* qpdf, std::string const& description)
{
return value->setDescription(qpdf, description);
}
bool
getDescription(QPDF*& qpdf, std::string& description)
{
return value->getDescription(qpdf, description);
}
bool
hasDescription()
{
return value->hasDescription();
}
void
setParsedOffset(qpdf_offset_t offset)
{
value->setParsedOffset(offset);
}
qpdf_offset_t
getParsedOffset()
{
return value->getParsedOffset();
}
void
assign(std::shared_ptr<QPDFValueProxy> o)
{
value = o->value;
}
void
swapWith(std::shared_ptr<QPDFValueProxy> o)
{
auto v = value;
value = o->value;
o->value = v;
auto og = value->og;
value->og = o->value->og;
o->value->og = og;
}
// The following two methods are for use by class QPDF only
void
setObjGen(QPDF* qpdf, QPDFObjGen const& og)
{
value->qpdf = qpdf;
value->og = og;
}
void
reset()
{
value->reset();
// It would be better if, rather than clearing value->qpdf and
// value->og, we completely replaced value with
// QPDF_Destroyed. However, at the time of the release of qpdf
// 11, this causes test failures and would likely break a lot
// of code since it possible for a direct object that
// recursively contains no indirect objects to be copied into
// multiple QPDF objects. For that reason, we have to break
// the association with the owning QPDF but not otherwise
// mutate the object. For indirect objects, QPDF::~QPDF
// replaces indirect objects with QPDF_Destroyed, which clears
// circular references. If this code were able to do that,
// that code would not have to.
value->qpdf = nullptr;
value->og = QPDFObjGen();
}
void destroy();
bool
isUnresolved() const
{
return value->type_code == ::ot_unresolved;
}
void
resolve()
{
if (isUnresolved()) {
doResolve();
}
}
void doResolve();
template <typename T>
T*
as()
{
return dynamic_cast<T*>(value.get());
}
private:
QPDFValueProxy(QPDFValueProxy const&) = delete;
QPDFValueProxy& operator=(QPDFValueProxy const&) = delete;
std::shared_ptr<QPDFValue> value;
};
#endif // QPDFVALUEPROXY_HH
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