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// Copyright (c) 2005-2023 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 QPDFOUTLINEOBJECTHELPER_HH
#define QPDFOUTLINEOBJECTHELPER_HH
#include <qpdf/QPDFObjGen.hh>
#include <qpdf/QPDFObjectHelper.hh>
#include <vector>
class QPDFOutlineDocumentHelper;
#include <qpdf/DLL.h>
// This is an object helper for outline items. Outlines, also known as
// bookmarks, are described in section 12.3.3 of the PDF spec
// (ISO-32000). See comments below for details.
class QPDFOutlineObjectHelper: public QPDFObjectHelper
{
public:
QPDF_DLL
virtual ~QPDFOutlineObjectHelper()
{
// This must be cleared explicitly to avoid circular references
// that prevent cleanup of pointer holders.
this->m->parent = 0;
}
// All constructors are private. You can only create one of these
// using QPDFOutlineDocumentHelper.
// Return parent pointer. Returns a null pointer if this is a
// top-level outline.
QPDF_DLL
std::shared_ptr<QPDFOutlineObjectHelper> getParent();
// Return children as a list.
QPDF_DLL
std::vector<QPDFOutlineObjectHelper> getKids();
// Return the destination, regardless of whether it is named or
// explicit and whether it is directly provided or in a GoTo
// action. Returns a null object if the destination can't be
// determined. Named destinations can be resolved using the older
// root /Dest dictionary or the current names tree.
QPDF_DLL
QPDFObjectHandle getDest();
// Return the page that the outline points to. Returns a null
// object if the destination page can't be determined.
QPDF_DLL
QPDFObjectHandle getDestPage();
// Returns the value of /Count as present in the object, or 0 if
// not present. If count is positive, the outline is open. If
// negative, it is closed. Either way, the absolute value is the
// number descendant items that would be visible if this were
// open.
QPDF_DLL
int getCount();
// Returns the title as a UTF-8 string. Returns the empty string
// if there is no title.
QPDF_DLL
std::string getTitle();
class Accessor
{
friend class QPDFOutlineDocumentHelper;
static QPDFOutlineObjectHelper
create(QPDFObjectHandle oh, QPDFOutlineDocumentHelper& dh, int depth)
{
return QPDFOutlineObjectHelper(oh, dh, depth);
}
};
private:
QPDF_DLL
QPDFOutlineObjectHelper(QPDFObjectHandle, QPDFOutlineDocumentHelper&, int);
class Members
{
friend class QPDFOutlineObjectHelper;
public:
QPDF_DLL
~Members() = default;
private:
Members(QPDFOutlineDocumentHelper& dh);
Members(Members const&) = delete;
QPDFOutlineDocumentHelper& dh;
std::shared_ptr<QPDFOutlineObjectHelper> parent;
std::vector<QPDFOutlineObjectHelper> kids;
};
std::shared_ptr<Members> m;
};
#endif // QPDFOUTLINEOBJECTHELPER_HH
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