QPDFNameTreeObjectHelper.hh
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// Copyright (c) 2005-2020 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 QPDFNAMETREEOBJECTHELPER_HH
#define QPDFNAMETREEOBJECTHELPER_HH
#include <qpdf/QPDFObjectHelper.hh>
#include <qpdf/QPDFObjGen.hh>
#include <map>
#include <qpdf/DLL.h>
// This is an object helper for name trees. See section 7.9.6 in the
// PDF spec (ISO 32000) for a description of name trees. This
// implementation disregards stated limits and sequencing and simply
// builds a map from string object. If the array of values does not
// contain a string where expected, this implementation silently skips
// forward until it finds a string. When looking up items in the name
// tree, use UTF-8 strings. All names are normalized for lookup
// purposes.
class QPDFNameTreeObjectHelper: public QPDFObjectHelper
{
public:
QPDF_DLL
QPDFNameTreeObjectHelper(QPDFObjectHandle);
QPDF_DLL
virtual ~QPDFNameTreeObjectHelper();
// Return whether the number tree has an explicit entry for this
// number.
QPDF_DLL
bool hasName(std::string const& utf8);
// Find an object by name. If found, returns true and initializes
// oh.
QPDF_DLL
bool findObject(std::string const& utf8, QPDFObjectHandle& oh);
QPDF_DLL
std::map<std::string, QPDFObjectHandle> getAsMap() const;
private:
class Members
{
friend class QPDFNameTreeObjectHelper;
public:
QPDF_DLL
~Members();
private:
Members();
Members(Members const&);
std::map<std::string, QPDFObjectHandle> entries;
std::set<QPDFObjGen> seen;
};
void updateMap(QPDFObjectHandle oh);
PointerHolder<Members> m;
};
#endif // QPDFNAMETREEOBJECTHELPER_HH