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134 lines
3.3 KiB
134 lines
3.3 KiB
/***************************************************************************
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sq_pixmapcache.h - description
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-------------------
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begin : Sep 28 2004
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copyright : (C) 2004 by Baryshev Dmitry
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email : ksquirrel.iv@gmail.com
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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#ifndef SQ_PIXMAPCACHE_H
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#define SQ_PIXMAPCACHE_H
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#include <tqmap.h>
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#include <tqobject.h>
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#include <kurl.h>
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#include "sq_thumbnailinfo.h"
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class SQ_DirThumbs;
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/*
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* SQ_PixmapCache represents a simple memory cache, which
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* stores pixmaps. It doesn't use neither TQPixmapCache nor TQCache.
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*
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* Uses SQ_Dir(Thumbnails) to store thumbnails on disk.
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*/
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class SQ_PixmapCache : public TQObject, public TQMap<KURL, SQ_Thumbnail>
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{
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public:
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SQ_PixmapCache(TQObject *parent, int limit = 20*1024);
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~SQ_PixmapCache();
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/*
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* Get maximum cache limit.
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*/
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int cacheLimit();
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/*
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* Set cache limit, in kilobytes.
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*
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* 200 means ~200 Kb, 1024 - 1Mb
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*/
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void setCacheLimit(int);
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/*
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* Write all entries to disk and clear cache.
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*/
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void sync();
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/*
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* Write one entry to disk and remove it from cache.
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*/
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void syncEntry(const KURL &key, SQ_Thumbnail &thumb);
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/*
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* Insert new entry to cache
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*/
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void insert(const KURL &key, const SQ_Thumbnail &thumb);
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/*
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* Check if pixmap, represented by 'key', is already in cache.
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*/
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bool contains2(const KURL &key, SQ_Thumbnail &th);
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/*
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* Calculate total size used by cache (not exact!)
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*/
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int totalSize();
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/*
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* Is cache full ?
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*/
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bool full();
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/*
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* Clear cache.
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*/
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void clear();
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/*
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* Remove entry from cache.
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*/
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void removeEntry(const KURL &key);
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/*
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* Remove entry from cache and from disk.
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*/
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void removeEntryFull(const KURL &key);
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static SQ_PixmapCache* instance() { return m_instance; }
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private:
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int entrySize(const SQ_Thumbnail &th) const;
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private:
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int cache_limit;
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int last_full;
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bool valid_full;
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SQ_DirThumbs *dir;
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static SQ_PixmapCache *m_instance;
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};
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inline
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int SQ_PixmapCache::cacheLimit()
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{
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return cache_limit;
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}
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inline
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void SQ_PixmapCache::setCacheLimit(int n)
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{
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cache_limit = n << 10;
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}
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inline
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bool SQ_PixmapCache::full()
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{
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// when 'cache_limit' is 0, pixmap cache is always full
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return cache_limit ? (cache_limit <= totalSize()) : true;
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}
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#endif
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