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168 lines
3.7 KiB
168 lines
3.7 KiB
/***************************************************************************
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sq_pixmapcache.cpp - 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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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "sq_pixmapcache.h"
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#include "sq_thumbnailsize.h"
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#include "sq_dirthumbs.h"
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SQ_PixmapCache * SQ_PixmapCache::m_instance = 0;
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SQ_PixmapCache::SQ_PixmapCache(TQObject *parent, int limit)
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: TQObject(parent), TQMap<KURL, SQ_Thumbnail>()
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{
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m_instance = this;
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cache_limit = limit << 10;
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dir = new SQ_DirThumbs;
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valid_full = false;
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}
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SQ_PixmapCache::~SQ_PixmapCache()
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{
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delete dir;
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}
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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 SQ_PixmapCache::sync()
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{
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// nothing to sync
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if(empty())
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return;
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iterator itEnd = end();
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// go through array and sync each entry
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for(iterator it = begin();it != itEnd;++it)
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syncEntry(it.key(), it.data());
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// remove all entries from cache
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clear();
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}
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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 SQ_PixmapCache::syncEntry(const KURL &key, SQ_Thumbnail &thumb)
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{
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// let SQ_DirThumbs save thumbnail
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dir->saveThumbnail(key, thumb);
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}
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/*
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* Insert new entry to cache
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*/
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void SQ_PixmapCache::insert(const KURL &key, const SQ_Thumbnail &thumb)
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{
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// thumbnail is null ?
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if(thumb.thumbnail.isNull())
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return;
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// calc new cache size
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last_full += entrySize(thumb);
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// add new entry
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TQMap<KURL, SQ_Thumbnail>::insert(key, thumb);
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}
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/*
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* Remove entry from cache.
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*/
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void SQ_PixmapCache::removeEntry(const KURL &key)
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{
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iterator it = find(key);
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// no item to remove ?
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if(it == end())
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return;
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last_full -= entrySize(it.data());
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TQMap<KURL, SQ_Thumbnail>::remove(key);
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}
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/*
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* Remove entry from cache and from disk.
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*/
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void SQ_PixmapCache::removeEntryFull(const KURL &key)
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{
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// remove from memory
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removeEntry(key);
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// remove from disk
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dir->removeFile(key);
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}
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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 SQ_PixmapCache::contains2(const KURL &key, SQ_Thumbnail &th)
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{
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iterator it = find(key);
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// item found
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if(it != end())
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{
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th = it.data();
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return true;
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}
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// not found
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return false;
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}
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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 SQ_PixmapCache::totalSize()
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{
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if(valid_full)
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return last_full;
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int total = 0;
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iterator itEnd = end();
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for(iterator it = begin();it != itEnd;++it)
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{
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total += entrySize(it.data());
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}
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last_full = total;
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valid_full = true;
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return total;
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}
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void SQ_PixmapCache::clear()
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{
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valid_full = false;
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TQMap<KURL, SQ_Thumbnail>::clear();
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}
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int SQ_PixmapCache::entrySize(const SQ_Thumbnail &th) const
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{
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return th.thumbnail.width() * th.thumbnail.height() * 4;
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}
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