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98ddc514da
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@21705 a592a061-630c-0410-9148-cb99ea01b6c8
116 lines
1.9 KiB
C++
116 lines
1.9 KiB
C++
/**
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* \file GraphicsCache.cpp
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* This file is part of LyX, the document processor.
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* Licence details can be found in the file COPYING.
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*
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* \author Baruch Even
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* \author Angus Leeming
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*
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* Full author contact details are available in file CREDITS.
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*/
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#include <config.h>
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#include "GraphicsCache.h"
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#include "GraphicsCacheItem.h"
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#include "GraphicsImage.h"
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#include "debug.h"
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#include "support/filetools.h"
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#include <map>
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using std::string;
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namespace lyx {
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using support::FileName;
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namespace graphics {
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/** The cache contains one item per file, so use a map to find the
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* cache item quickly by filename.
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*/
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typedef std::map<FileName, Cache::ItemPtr> CacheType;
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class Cache::Impl {
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public:
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///
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CacheType cache;
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};
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Cache & Cache::get()
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{
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// Now return the cache
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static Cache singleton;
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return singleton;
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}
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Cache::Cache()
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: pimpl_(new Impl)
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{}
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Cache::~Cache()
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{
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delete pimpl_;
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}
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std::vector<string> Cache::loadableFormats() const
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{
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return Image::loadableFormats();
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}
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void Cache::add(FileName const & file) const
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{
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// Is the file in the cache already?
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if (inCache(file)) {
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LYXERR(Debug::GRAPHICS, "Cache::add(" << file << "):\n"
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<< "The file is already in the cache.");
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return;
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}
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pimpl_->cache[file] = ItemPtr(new CacheItem(file));
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}
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void Cache::remove(FileName const & file) const
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{
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CacheType::iterator it = pimpl_->cache.find(file);
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if (it == pimpl_->cache.end())
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return;
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ItemPtr & item = it->second;
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if (item.use_count() == 1) {
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// The graphics file is in the cache, but nothing else
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// references it.
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pimpl_->cache.erase(it);
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}
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}
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bool Cache::inCache(FileName const & file) const
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{
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return pimpl_->cache.find(file) != pimpl_->cache.end();
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}
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Cache::ItemPtr const Cache::item(FileName const & file) const
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{
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CacheType::const_iterator it = pimpl_->cache.find(file);
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if (it == pimpl_->cache.end())
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return ItemPtr();
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return it->second;
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}
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} // namespace graphics
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} // namespace lyx
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