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Diffstat (limited to 'include/unotools/options.hxx')
-rw-r--r-- | include/unotools/options.hxx | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/include/unotools/options.hxx b/include/unotools/options.hxx new file mode 100644 index 000000000000..5a37b026fb63 --- /dev/null +++ b/include/unotools/options.hxx @@ -0,0 +1,95 @@ +/* -*- 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 . + */ + +#ifndef INCLUDED_unotools_OPTIONS_HXX +#define INCLUDED_unotools_OPTIONS_HXX + +#include "sal/config.h" +#include "unotools/unotoolsdllapi.h" +#include <vector> + +/* + The class utl::detail::Options provides a kind of multiplexer. It implements a ConfigurationListener + that is usually registered at a ConfigItem class. At the same time it implements a ConfigurationBroadcaster + that allows further ("external") listeners to register. + Once the class deriving from Options is notified about + configuration changes by the ConfigItem if its content has been changed by calling some of its methods, + a call of the Options::NotifyListeners() method will send out notifications to all external listeners. +*/ + +namespace utl { + + class ConfigurationBroadcaster; + + // interface for configuration listener + class UNOTOOLS_DLLPUBLIC ConfigurationListener + { + public: + virtual ~ConfigurationListener(); + + virtual void ConfigurationChanged( ConfigurationBroadcaster* p, sal_uInt32 nHint=0 ) = 0; + }; + typedef ::std::vector< ConfigurationListener* > IMPL_ConfigurationListenerList; + + // complete broadcasting implementation + class UNOTOOLS_DLLPUBLIC ConfigurationBroadcaster + { + IMPL_ConfigurationListenerList* mpList; + sal_Int32 m_nBroadcastBlocked; // broadcast only if this is 0 + sal_uInt32 m_nBlockedHint; + + public: + void AddListener( utl::ConfigurationListener* pListener ); + void RemoveListener( utl::ConfigurationListener* pListener ); + + // notify listeners; nHint is an implementation detail of the particular class deriving from ConfigurationBroadcaster + void NotifyListeners( sal_uInt32 nHint ); + ConfigurationBroadcaster(); + virtual ~ConfigurationBroadcaster(); + virtual void BlockBroadcasts( bool bBlock ); + }; + +namespace detail { + +// A base class for the various option classes supported by +// unotools/source/config/itemholderbase.hxx (which must be public, as it is +// shared between unotools, svl and svt) +// It also provides an implementation for a Configuration Listener and inherits a broadcaster implementation + +class UNOTOOLS_DLLPUBLIC SAL_WARN_UNUSED Options + : public utl::ConfigurationBroadcaster, public utl::ConfigurationListener +{ +public: + Options(); + + virtual ~Options() = 0; + +private: + UNOTOOLS_DLLPRIVATE Options(Options &); // not defined + UNOTOOLS_DLLPRIVATE void operator =(Options &); // not defined + +protected: + virtual void ConfigurationChanged( ::utl::ConfigurationBroadcaster* p, sal_uInt32 nHint=0 ); +}; + +} } + +#endif + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |