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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 .
+ */
+
+#ifndef INCLUDED_UNOTOOLS_OPTIONS_HXX
+#define INCLUDED_UNOTOOLS_OPTIONS_HXX
+
+#include <sal/config.h>
+#include <unotools/unotoolsdllapi.h>
+#include <o3tl/typed_flags_set.hxx>
+#include <vector>
+#include <memory>
+
+// bits for broadcasting hints of changes in ConfigurationListener::ConfigurationChanged, may be combined
+enum class ConfigurationHints {
+ NONE = 0x0000,
+ Locale = 0x0001,
+ Currency = 0x0002,
+ UiLocale = 0x0004,
+ DecSep = 0x0008,
+ DatePatterns = 0x0010,
+ IgnoreLang = 0x0020,
+ CtlSettingsChanged = 0x2000,
+};
+namespace o3tl {
+ template<> struct typed_flags<ConfigurationHints> : is_typed_flags<ConfigurationHints, 0x203f> {};
+}
+
+/*
+ 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, ConfigurationHints nHint ) = 0;
+ };
+ typedef ::std::vector< ConfigurationListener* > IMPL_ConfigurationListenerList;
+
+ // complete broadcasting implementation
+ class UNOTOOLS_DLLPUBLIC ConfigurationBroadcaster
+ {
+ std::unique_ptr<IMPL_ConfigurationListenerList> mpList;
+ sal_Int32 m_nBroadcastBlocked; // broadcast only if this is 0
+ ConfigurationHints m_nBlockedHint;
+
+ public:
+ void AddListener( utl::ConfigurationListener* pListener );
+ void RemoveListener( utl::ConfigurationListener const * pListener );
+
+ // notify listeners; nHint is an implementation detail of the particular class deriving from ConfigurationBroadcaster
+ void NotifyListeners( ConfigurationHints nHint );
+ ConfigurationBroadcaster();
+ ConfigurationBroadcaster(ConfigurationBroadcaster const & );
+ virtual ~ConfigurationBroadcaster();
+ ConfigurationBroadcaster & operator =(ConfigurationBroadcaster const & other);
+ 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 SAL_WARN_UNUSED UNOTOOLS_DLLPUBLIC Options
+ : public utl::ConfigurationBroadcaster, public utl::ConfigurationListener
+{
+public:
+ Options();
+
+ virtual ~Options() override = 0;
+
+private:
+ Options(Options const &) = delete;
+ Options& operator =(Options const &) = delete;
+
+protected:
+ virtual void ConfigurationChanged( ::utl::ConfigurationBroadcaster* p, ConfigurationHints nHint ) override;
+};
+
+} }
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */