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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*************************************************************************
*
* 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_PAGE_CACHE_MANAGER_HXX
#define SD_PAGE_CACHE_MANAGER_HXX
#include <sal/types.h>
#include <com/sun/star/uno/XInterface.hpp>
#include <boost/shared_ptr.hpp>
#include <memory>
#include <vector>
class Size;
class SdDrawDocument;
class SdrPage;
namespace sd { namespace slidesorter { namespace view {
class SlideSorterView;
class PageObjectViewObjectContact;
} } }
namespace sd { namespace slidesorter { namespace model {
class SlideSorterModel;
} } }
namespace sd { namespace slidesorter { namespace cache {
namespace css = ::com::sun::star;
class BitmapCache;
/** Provide and manage the preview bitmap caches for all slide sorter
instances. There is one cache per active slide sorter plus a small
number of caches that are no longer in use. The later are kept to speed
up the switching between views.
*/
class PageCacheManager
{
public:
typedef BitmapCache Cache;
typedef ::std::vector< ::std::pair<Size, ::boost::shared_ptr<BitmapCache> > > BestFittingPageCaches;
typedef css::uno::Reference<css::uno::XInterface> DocumentKey;
/** Return the one instance of the PageCacheManager class.
*/
static ::boost::shared_ptr<PageCacheManager> Instance (void);
/** Look up the cache for the given model in which the previews have the
specified size. If no such cache exists, then one is created. When
a new BitmapCache is created its Recycle() method is called with a
sorted list of existing caches from which the new one initialize its
previews.
@return
The returned cache lives as long as somebody keeps a shared
pointer and the ReleaseCache() method has not been called.
*/
::boost::shared_ptr<Cache> GetCache (
DocumentKey pDocument,
const Size& rPreviewSize);
/** Tell the cache manager to release its own reference to the specified
cache. After that the cache will live as long as the caller (and
maybe others) holds its reference.
*/
void ReleaseCache (const ::boost::shared_ptr<Cache>& rpCache);
/** This is an information to the cache manager that the size of preview
bitmaps in the specified cache has changed.
*/
::boost::shared_ptr<Cache> ChangeSize (
const ::boost::shared_ptr<Cache>& rpCache,
const Size& rOldPreviewSize,
const Size& rNewPreviewSize);
/** Invalidate the preview bitmap for one slide that belongs to the
specified document. The bitmaps for this slide in all caches are
marked as out-of-date and will be re-created when they are requested
the next time.
*/
bool InvalidatePreviewBitmap (
DocumentKey pDocument,
const SdrPage* pPage);
/** Invalidate the preview bitmaps for all slides that belong to the
specified document. This is necessary after model changes that
affect e.g. page number fiels.
*/
void InvalidateAllPreviewBitmaps (DocumentKey pDocument);
/** Invalidate all the caches that are currently in use and destroy
those that are not. This is used for example when the high contrast
mode is turned on or off.
*/
void InvalidateAllCaches (void);
/** Call this method when a page has been deleted and its preview
is not needed anymore.
*/
void ReleasePreviewBitmap (const SdrPage* pPage);
private:
/** Singleton instance of the cache manager. Note that this is a weak
pointer. The (implementation class of) ViewShellBase holds a
shared_ptr so that the cache manager has the same life time as the
ViewShellBase.
*/
static ::boost::weak_ptr<PageCacheManager> mpInstance;
/// List of active caches.
class PageCacheContainer;
::std::auto_ptr<PageCacheContainer> mpPageCaches;
/// List of inactive, recently used caches.
class RecentlyUsedPageCaches;
::std::auto_ptr<RecentlyUsedPageCaches> mpRecentlyUsedPageCaches;
/** The maximal number of recently used caches that are kept alive after
they have become inactive, i.e. after they are not used anymore by a
slide sorter.
*/
const sal_uInt32 mnMaximalRecentlyCacheCount;
PageCacheManager (void);
~PageCacheManager (void);
class Deleter;
friend class Deleter;
::boost::shared_ptr<Cache> GetRecentlyUsedCache(
DocumentKey pDocument,
const Size& rSize);
/** Add the given cache to the list of recently used caches for the
document. There is one such list per document. Each least has at
most mnMaximalRecentlyCacheCount members.
*/
void PutRecentlyUsedCache(
DocumentKey pDocument,
const Size& rPreviewSize,
const ::boost::shared_ptr<Cache>& rpCache);
/** Return a sorted list of the available caches, both active caches and
those recently used, for the given document. The sort order is so
that an exact match of the preview size is at the front. Other
caches follow with the largest size first.
*/
BestFittingPageCaches GetBestFittingCaches (
DocumentKey pDocument,
const Size& rPreviewSize);
/** This method is used internally to initialize a newly created
BitmapCache with already exisiting previews.
*/
void Recycle (
const ::boost::shared_ptr<Cache>& rpCache,
DocumentKey pDocument,
const Size& rPreviewSize);
};
} } } // end of namespace ::sd::slidesorter::cache
#endif
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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