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// Copyright (c) 2005-2022 Jay Berkenbilt
//
// This file is part of qpdf.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// Versions of qpdf prior to version 7 were released under the terms
// of version 2.0 of the Artistic License. At your option, you may
// continue to consider qpdf to be licensed under those terms. Please
// see the manual for additional information.
#ifndef QPDFOBJECT_HH
#define QPDFOBJECT_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 QPDFObject
{
friend class QPDFValue;
public:
QPDFObject() = default;
virtual ~QPDFObject() = default;
std::shared_ptr<QPDFObject>
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;
}
// Returns nullptr for direct objects
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<QPDFObject> o)
{
value = o->value;
}
void
swapWith(std::shared_ptr<QPDFObject> 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
resetObjGen()
{
value->qpdf = nullptr;
value->og = QPDFObjGen();
}
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());
}
// Accessor to give specific access to non-public methods
class ObjAccessor
{
friend class QPDF;
friend class QPDFObjectHandle;
private:
static void
releaseResolved(QPDFObject* o)
{
if (o) {
o->releaseResolved();
}
}
};
friend class ObjAccessor;
protected:
virtual void
releaseResolved()
{
value->releaseResolved();
}
private:
QPDFObject(QPDFObject const&) = delete;
QPDFObject& operator=(QPDFObject const&) = delete;
std::shared_ptr<QPDFValue> value;
};
#endif // QPDFOBJECT_HH
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