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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 QPDFOUTLINEDOCUMENTHELPER_HH
#define QPDFOUTLINEDOCUMENTHELPER_HH
#include <qpdf/QPDFDocumentHelper.hh>
#include <qpdf/QPDFNameTreeObjectHelper.hh>
#include <qpdf/QPDFOutlineObjectHelper.hh>
#include <qpdf/QPDF.hh>
#include <map>
#include <set>
#include <vector>
#include <qpdf/DLL.h>
// This is a document helper for outlines, also known as bookmarks.
// Outlines are discussed in section 12.3.3 of the PDF spec
// (ISO-32000). With the help of QPDFOutlineObjectHelper, the outlines
// tree is traversed, and a bidirectional map is made between pages
// and outlines. See also QPDFOutlineObjectHelper.
class QPDFOutlineDocumentHelper: public QPDFDocumentHelper
{
public:
QPDF_DLL
QPDFOutlineDocumentHelper(QPDF&);
QPDF_DLL
virtual ~QPDFOutlineDocumentHelper() = default;
QPDF_DLL
bool hasOutlines();
QPDF_DLL
std::vector<QPDFOutlineObjectHelper> getTopLevelOutlines();
// If the name is a name object, look it up in the /Dests key of
// the document catalog. If the name is a string, look it up in
// the name tree pointed to by the /Dests key of the names
// dictionary.
QPDF_DLL
QPDFObjectHandle resolveNamedDest(QPDFObjectHandle name);
// Return a list outlines that are known to target the specified
// page
QPDF_DLL
std::vector<QPDFOutlineObjectHelper> getOutlinesForPage(QPDFObjGen const&);
class Accessor
{
friend class QPDFOutlineObjectHelper;
QPDF_DLL
static bool
checkSeen(QPDFOutlineDocumentHelper& dh, QPDFObjGen const& og)
{
return dh.checkSeen(og);
}
};
private:
bool checkSeen(QPDFObjGen const& og);
void initializeByPage();
class Members
{
friend class QPDFOutlineDocumentHelper;
public:
QPDF_DLL
~Members() = default;
private:
Members() = default;
Members(Members const&) = delete;
std::vector<QPDFOutlineObjectHelper> outlines;
std::set<QPDFObjGen> seen;
QPDFObjectHandle dest_dict;
std::shared_ptr<QPDFNameTreeObjectHelper> names_dest;
std::map<QPDFObjGen, std::vector<QPDFOutlineObjectHelper>> by_page;
};
std::shared_ptr<Members> m;
};
#endif // QPDFOUTLINEDOCUMENTHELPER_HH
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