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/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
#ifndef SD_TOOLPANEL_CONTROLS_MASTER_PAGE_CONTAINER_QUEUE_HXX
#define SD_TOOLPANEL_CONTROLS_MASTER_PAGE_CONTAINER_QUEUE_HXX
#include "MasterPageContainer.hxx"
#include "MasterPageDescriptor.hxx"
#include <boost/scoped_ptr.hpp>
#include <boost/weak_ptr.hpp>
namespace sd { namespace toolpanel { namespace controls {
/** The queue stores and processes all requests from a MasterPageContainer
for the creation of previews.
The order of request processing and its timing is controlled by a
heuristic that uses values given with each request and which is
controlled by various parameters that are described below.
*/
class MasterPageContainerQueue
{
public:
class ContainerAdapter { public:
virtual bool UpdateDescriptor (
const SharedMasterPageDescriptor& rpDescriptor,
bool bForcePageObject,
bool bForcePreview,
bool bSendEvents) = 0;
};
static MasterPageContainerQueue* Create (
const ::boost::weak_ptr<ContainerAdapter>& rpContainer);
virtual ~MasterPageContainerQueue (void);
/** This method is typically called for entries in the container for
which GetPreviewState() returns OS_CREATABLE. The creation of the
preview is then scheduled to be executed asynchronously at a later
point in time. When the preview is available the change listeners
will be notified.
*/
bool RequestPreview (const SharedMasterPageDescriptor& rDescriptor);
/** Return <TRUE/> when there is a request currently in the queue for
the given token.
*/
bool HasRequest (MasterPageContainer::Token aToken) const;
/** Return <TRUE/> when there is at least one request in the queue.
*/
bool IsEmpty (void) const;
/** After this call the queue does not wait anymore for requests with
higher priority when only a small number of requests with lower
priority are present. This method should be called when all
templates are inserted into the MasterPageContainer.
*/
void ProcessAllRequests (void);
private:
::boost::weak_ptr<ContainerAdapter> mpWeakContainer;
class PreviewCreationRequest;
class RequestQueue;
::boost::scoped_ptr<RequestQueue> mpRequestQueue;
Timer maDelayedPreviewCreationTimer;
sal_uInt32 mnRequestsServedCount;
// There are a couple of values that define various aspects of the
// heuristic that defines the order and timing in which requests for
// preview creation are processed.
/** The time to wait (in milliseconds) between the creation of previews.
*/
static const sal_Int32 snDelayedCreationTimeout;
/** The time to wait when the system is not idle.
*/
static const sal_Int32 snDelayedCreationTimeoutWhenNotIdle;
/** Requests for previews of master pages in a document have their
priority increased by this value.
*/
static const sal_Int32 snMasterPagePriorityBoost;
/** When only requests which a priority lower than this threshold exist
and not many requests have been made yet then wait with processing
them until more requests are present.
*/
static const sal_Int32 snWaitForMoreRequestsPriorityThreshold;
/** When only requests which a priority lower than a threshold exist
and not more requests than this number have been made or already
processed then wait with processing them until more requests are
present.
*/
static sal_uInt32 snWaitForMoreRequestsCount;
MasterPageContainerQueue (const ::boost::weak_ptr<ContainerAdapter>& rpContainer);
void LateInit (void);
/** Calculate the priority that defines the order in which requests
are processed.
*/
sal_Int32 CalculatePriority (const SharedMasterPageDescriptor& rDescriptor) const;
DECL_LINK(DelayedPreviewCreation, Timer *);
};
} } } // end of namespace ::sd::toolpanel::controls
#endif
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