KisRecentFileIconCache.h

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/*
 *  SPDX-FileCopyrightText: 2022 Alvin Wong <alvin@alvinhc.com>
 *
 *  SPDX-License-Identifier: GPL-2.0-or-later
 */
 
#ifndef KIS_RECENT_FILE_ICON_CACHE_H
#define KIS_RECENT_FILE_ICON_CACHE_H
 
#include <QFuture>
#include <QIcon>
#include <QMap>
#include <QThreadPool>
#include <QUrl>
 
class KisRecentFileIconCache : public QObject
{
    Q_OBJECT
 
    struct CacheItem;
 
    QMap<QUrl, CacheItem> m_iconCacheMap;
    QThreadPool m_iconFetchThreadPool;
    float m_devicePixelRatioF {1.0};
 
public:
    KisRecentFileIconCache();
    ~KisRecentFileIconCache();
 
public:
    static KisRecentFileIconCache *instance();
 
    QIcon getOrQueueFileIcon(const QUrl &url);
 
    void invalidateFileIcon(const QUrl &url);
 
    void reloadFileIcon(const QUrl &url);
 
private Q_SLOTS:
    void cleanupOnQuit();
    void iconFetched();
    void futureCanceled();
 
Q_SIGNALS:
    void fileIconChanged(const QUrl &url, const QIcon &icon);
};
 
#endif /* KIS_RECENT_FILE_ICON_CACHE_H */