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Diffstat (limited to 'sd/source/ui/framework/configuration/ChangeRequestQueueProcessor.hxx')
-rw-r--r-- | sd/source/ui/framework/configuration/ChangeRequestQueueProcessor.hxx | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/sd/source/ui/framework/configuration/ChangeRequestQueueProcessor.hxx b/sd/source/ui/framework/configuration/ChangeRequestQueueProcessor.hxx new file mode 100644 index 0000000000..823df7d8f8 --- /dev/null +++ b/sd/source/ui/framework/configuration/ChangeRequestQueueProcessor.hxx @@ -0,0 +1,126 @@ +/* -*- 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 "ChangeRequestQueue.hxx" +#include <osl/mutex.hxx> + +#include <tools/link.hxx> + +#include <memory> + +namespace com::sun::star::drawing::framework +{ +class XConfiguration; +} +namespace com::sun::star::drawing::framework +{ +class XConfigurationChangeRequest; +} + +struct ImplSVEvent; + +namespace sd::framework +{ +class ConfigurationUpdater; + +/** The ChangeRequestQueueProcessor owns the ChangeRequestQueue and + processes the configuration change requests. + + When after processing one entry the queue is empty then the + XConfigurationController::update() method is called so that the changes + made to the local XConfiguration reference are reflected by the UI. + + Queue entries are processed asynchronously by calling PostUserEvent(). +*/ +class ChangeRequestQueueProcessor +{ +public: + /** The queue processor is created with a reference to an + ConfigurationController so that its UpdateConfiguration() method can + be called when the queue becomes empty. + */ + explicit ChangeRequestQueueProcessor(std::shared_ptr<ConfigurationUpdater> pUpdater); + ~ChangeRequestQueueProcessor(); + + /** Sets the configuration who will be changed by subsequent change + requests. This method should be called only by the configuration + controller who owns the configuration. + */ + void SetConfiguration( + const css::uno::Reference<css::drawing::framework::XConfiguration>& rxConfiguration); + + /** The given request is appended to the end of the queue and will + eventually be processed when all other entries in front of it have + been processed. + */ + void AddRequest( + const css::uno::Reference<css::drawing::framework::XConfigurationChangeRequest>& rxRequest); + + /** Returns </sal_True> when the queue is empty. + */ + bool IsEmpty() const; + + /** Process all events in the queue synchronously. + + <p>This method is typically called when the framework is shut down + to establish an empty configuration.</p> + */ + void ProcessUntilEmpty(); + + /** Process the first event in queue. + */ + void ProcessOneEvent(); + + /** Remove all events from the queue. + + <p>This method is typically called when the framework is shut down + to avoid the processing of still pending activation requests.</p> + */ + void Clear(); + +private: + mutable ::osl::Mutex maMutex; + + ChangeRequestQueue maQueue; + + /** The id returned by the last PostUserEvent() call. This id is stored + so that a pending user event can be removed when the queue processor + is destroyed. + */ + ImplSVEvent* mnUserEventId; + + css::uno::Reference<css::drawing::framework::XConfiguration> mxConfiguration; + + std::shared_ptr<ConfigurationUpdater> mpConfigurationUpdater; + + /** Initiate the processing of the entries in the queue. The actual + processing starts asynchronously. + */ + void StartProcessing(); + + /** Callback function for the PostUserEvent() call. + */ + DECL_LINK(ProcessEvent, void*, void); +}; + +} // end of namespace sd::framework + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |