mirror of
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137 lines
2.4 KiB
C++
137 lines
2.4 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 "Format.h"
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#include "frontends/Application.h"
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#include "support/debug.h"
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#include "support/FileName.h"
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#include <map>
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using namespace std;
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using namespace lyx::support;
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namespace lyx {
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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 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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vector<string> const & Cache::loadableFormats() const
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{
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static vector<string> fmts;
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if (!fmts.empty())
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return fmts;
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for (string const & native_extension : frontend::loadableImageFormats()) {
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for (Format const & format : theFormats()) {
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if (format.extension() == native_extension) {
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fmts.push_back(format.name());
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break;
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}
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}
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}
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if (lyxerr.debugging()) {
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LYXERR(Debug::GRAPHICS, "LyX recognises the following image formats:");
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for (string const & format : fmts) {
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LYXERR(Debug::GRAPHICS, format << ',');
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}
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}
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return fmts;
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}
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void Cache::add(FileName const & file, FileName const & doc_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, doc_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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