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84 lines
2.5 KiB
C++
84 lines
2.5 KiB
C++
// Copyright (c) 2005-2019 Jay Berkenbilt
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//
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// This file is part of qpdf.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// Versions of qpdf prior to version 7 were released under the terms
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// of version 2.0 of the Artistic License. At your option, you may
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// continue to consider qpdf to be licensed under those terms. Please
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// see the manual for additional information.
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#ifndef QPDFNAMETREEOBJECTHELPER_HH
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#define QPDFNAMETREEOBJECTHELPER_HH
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#include <qpdf/QPDFObjectHelper.hh>
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#include <qpdf/QPDFObjGen.hh>
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#include <map>
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#include <qpdf/DLL.h>
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// This is an object helper for name trees. See section 7.9.6 in the
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// PDF spec (ISO 32000) for a description of name trees. This
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// implementation disregards stated limits and sequencing and simply
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// builds a map from string object. If the array of values does not
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// contain a string where expected, this implementation silently skips
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// forward until it finds a string. When looking up items in the name
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// tree, use UTF-8 strings. All names are normalized for lookup
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// purposes.
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class QPDFNameTreeObjectHelper: public QPDFObjectHelper
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{
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public:
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QPDF_DLL
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QPDFNameTreeObjectHelper(QPDFObjectHandle);
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QPDF_DLL
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virtual ~QPDFNameTreeObjectHelper();
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// Return whether the number tree has an explicit entry for this
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// number.
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QPDF_DLL
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bool hasName(std::string const& utf8);
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// Find an object by name. If found, returns true and initializes
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// oh.
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QPDF_DLL
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bool findObject(std::string const& utf8, QPDFObjectHandle& oh);
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QPDF_DLL
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std::map<std::string, QPDFObjectHandle> getAsMap() const;
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private:
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class Members
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{
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friend class QPDFNameTreeObjectHelper;
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public:
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QPDF_DLL
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~Members();
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private:
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Members();
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Members(Members const&);
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std::map<std::string, QPDFObjectHandle> entries;
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std::set<QPDFObjGen> seen;
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};
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void updateMap(QPDFObjectHandle oh);
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PointerHolder<Members> m;
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};
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#endif // QPDFNAMETREEOBJECTHELPER_HH
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