QPDFValue.hh
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#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>
class QPDF;
class QPDFObjectHandle;
class QPDFObject;
class QPDFValue
{
friend class QPDFObject;
public:
virtual ~QPDFValue() = default;
virtual std::shared_ptr<QPDFObject> copy(bool shallow = false) = 0;
virtual std::string unparse() = 0;
virtual JSON getJSON(int json_version) = 0;
virtual void
setDescription(
QPDF* qpdf_p,
std::shared_ptr<std::string>& description,
qpdf_offset_t offset)
{
qpdf = qpdf_p;
object_description = description;
setParsedOffset(offset);
}
void
setDefaultDescription(QPDF* a_qpdf, QPDFObjGen const& a_og)
{
static auto default_description{
std::make_shared<std::string>("object $OG")};
if (!object_description) {
object_description = default_description;
}
qpdf = a_qpdf;
og = a_og;
}
std::string
getDescription()
{
auto description = object_description ? *object_description : "";
if (auto pos = description.find("$OG"); pos != std::string::npos) {
description.replace(pos, 3, og.unparse(' '));
}
if (auto pos = description.find("$PO"); pos != std::string::npos) {
qpdf_offset_t shift = (type_code == ::ot_dictionary) ? 2
: (type_code == ::ot_array) ? 1
: 0;
description.replace(pos, 3, std::to_string(parsed_offset + shift));
}
return description;
}
bool
hasDescription()
{
return qpdf != nullptr && object_description &&
!object_description->empty();
}
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, char const* type_name) :
type_code(type_code),
type_name(type_name)
{
}
QPDFValue(
qpdf_object_type_e type_code,
char const* type_name,
QPDF* qpdf,
QPDFObjGen const& og) :
type_code(type_code),
type_name(type_name),
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<std::string> object_description;
const qpdf_object_type_e type_code{::ot_uninitialized};
char const* type_name{"uninitialized"};
protected:
QPDF* qpdf{nullptr};
QPDFObjGen og{};
qpdf_offset_t parsed_offset{-1};
};
#endif // QPDFVALUE_HH