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#ifndef MODORGANIZER_ICONFETCHER_INCLUDED
#define MODORGANIZER_ICONFETCHER_INCLUDED
#include <QFileIconProvider>
#include <QStringView>
#include <mutex>
#include <set>
class IconFetcher
{
public:
IconFetcher();
~IconFetcher();
void stop();
QVariant icon(const QString& path) const;
QPixmap genericFileIcon() const;
QPixmap genericDirectoryIcon() const;
private:
struct QuickCache
{
QPixmap file;
QPixmap directory;
};
struct Cache
{
std::map<QString, QPixmap, std::less<>> map;
std::mutex mapMutex;
std::set<QString> queue;
std::mutex queueMutex;
};
class Waiter
{
public:
void wait();
void wakeUp();
private:
mutable std::mutex m_wakeUpMutex;
std::condition_variable m_wakeUp;
bool m_queueAvailable = false;
};
const int m_iconSize;
QFileIconProvider m_provider;
std::thread m_thread;
std::atomic<bool> m_stop;
mutable QuickCache m_quickCache;
mutable Cache m_extensionCache;
mutable Cache m_fileCache;
mutable Waiter m_waiter;
bool hasOwnIcon(const QString& path) const;
template <class T>
QPixmap getPixmapIcon(T&& t) const
{
return m_provider.icon(t).pixmap({m_iconSize, m_iconSize});
}
void threadFun();
void checkCache(Cache& cache);
void queue(Cache& cache, QString path) const;
QVariant fileIcon(const QString& path) const;
QVariant extensionIcon(const QStringView& ext) const;
};
#endif // MODORGANIZER_ICONFETCHER_INCLUDED
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