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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you 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 .
*/
#pragma once
#include <rtl/ustring.hxx>
#include <map>
#include <memory>
#include <vector>
namespace com::sun::star {
namespace beans { class XPropertySet; }
namespace uno { template<class A> class Reference; }
}
/** This class maintains an OUString->sal_Int16 mapping for cases in
* which an XPropertySet needs to be filled with values that are not
* yet known.
*
* A good example for appropriate use are footnotes and references to
* footnotes. Internally, the LibreOffice API numbers footnotes, and
* references to footnotes refer to that internal numbering. In the
* XML file format, these numbers are replaced with name strings. Now
* if during import of a document a reference to a footnote is
* encountered, two things can happen: 1) The footnote already
* appeared in the document. In this case the name is already known
* and the proper ID can be requested from the footnote. 2) The
* footnote will appear later in the document. In this case the ID is
* not yet known, and the reference-ID property of the reference
* cannot be determined. Hence, the reference has to be stored and the
* ID needs to bet set later, when the footnote is eventually found in
* the document.
*
* This class simplifies this process: If the footnote is found,
* ResolveId with the XML name and the ID is called. When a reference
* is encountered, SetProperty gets called with the reference's
* XPropertySet and the XML name. All remaining tasks are handled by
* the class.
*/
template <class A>
class XMLPropertyBackpatcher
{
/// name of property that gets set or backpatched
OUString sPropertyName;
/// backpatch list type
typedef ::std::vector<
css::uno::Reference<css::beans::XPropertySet> > BackpatchListType;
/// backpatch list for unresolved IDs
::std::map<const OUString, std::unique_ptr<BackpatchListType>> aBackpatchListMap;
/// mapping of names -> IDs
::std::map<const OUString, A> aIDMap;
public:
explicit XMLPropertyBackpatcher(
OUString sPropertyName);
~XMLPropertyBackpatcher();
/// resolve a known ID.
/// Call this as soon as the value for a particular name is known.
void ResolveId(
const OUString& sName,
A aValue);
/// Set property with the proper value for this name. If the value
/// is not yet known, store the XPropertySet in the backpatch list.
/// Use this whenever the value should be set, even if it is not yet known.
void SetProperty(
const css::uno::Reference<css::beans::XPropertySet> & xPropSet,
const OUString& sName);
};
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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