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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 QPDFEMBEDDEDFILEDOCUMENTHELPER_HH
#define QPDFEMBEDDEDFILEDOCUMENTHELPER_HH
#include <qpdf/QPDFDocumentHelper.hh>
#include <qpdf/DLL.h>
#include <qpdf/QPDF.hh>
#include <qpdf/QPDFFileSpecObjectHelper.hh>
#include <qpdf/QPDFNameTreeObjectHelper.hh>
#include <map>
#include <memory>
// This class provides a higher level interface around document-level
// file attachments, also known as embedded files. These are discussed
// in sections 7.7.4 and 7.11 of the ISO-32000 PDF specification.
class QPDFEmbeddedFileDocumentHelper: public QPDFDocumentHelper
{
public:
QPDF_DLL
QPDFEmbeddedFileDocumentHelper(QPDF&);
QPDF_DLL
virtual ~QPDFEmbeddedFileDocumentHelper() = default;
QPDF_DLL
bool hasEmbeddedFiles() const;
QPDF_DLL
std::map<std::string, std::shared_ptr<QPDFFileSpecObjectHelper>>
getEmbeddedFiles();
// If an embedded file with the given name exists, return a
// (shared) pointer to it. Otherwise, return nullptr.
QPDF_DLL
std::shared_ptr<QPDFFileSpecObjectHelper>
getEmbeddedFile(std::string const& name);
// Add or replace an attachment
QPDF_DLL
void replaceEmbeddedFile(
std::string const& name, QPDFFileSpecObjectHelper const&);
// Remove an embedded file if present. Return value is true if the
// file was present and was removed. This method not only removes
// the embedded file from the embedded files name tree but also
// nulls out the file specification dictionary. This means that
// any references to this file from file attachment annotations
// will also stop working. This is the best way to make the
// attachment actually disappear from the file and not just from
// the list of attachments.
QPDF_DLL
bool removeEmbeddedFile(std::string const& name);
private:
void initEmbeddedFiles();
class Members
{
friend class QPDFEmbeddedFileDocumentHelper;
public:
QPDF_DLL
~Members() = default;
private:
Members() = default;
Members(Members const&) = delete;
std::shared_ptr<QPDFNameTreeObjectHelper> embedded_files;
};
std::shared_ptr<Members> m;
};
#endif // QPDFEMBEDDEDFILEDOCUMENTHELPER_HH
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