qquickpixmapcache_p.h

Enable keyboard shortcuts

// Copyright (C) 2016 The Qt Company Ltd.

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

// Qt-Security score:significant reason:default

#ifndef QQUICKPIXMAPCACHE_H

#define QQUICKPIXMAPCACHE_H

//

//  W A R N I N G

//  -------------

//

// This file is not part of the Qt API.  It exists purely as an

// implementation detail.  This header file may change from version to

// version without notice, or even be removed.

//

// We mean it.

//

#include <QtCore/qmutex.h>

#include <QtCore/qurl.h>

#include <QtQuick/qquickimageprovider.h>

#include <private/qquickpixmap_p.h>

QT_BEGIN_NAMESPACE

class QQuickPixmapData;

/*! \internal

    A composite key to identify a QQuickPixmapData instance in a QHash.

*/

struct Q_AUTOTEST_EXPORT QQuickPixmapKey

    const QUrl *url;

    const QRect *region;

    const QSize *size;

    int frame;

    QQuickImageProviderOptions options;

};

/*! \internal

    A singleton managing the storage and garbage collection of QQuickPixmapData

    instances. It's exported only for the sake of autotests, and should not be

    manipulated outside qquickpixmap.cpp and qquickpixmapcache.cpp.

*/

class Q_AUTOTEST_EXPORT QQuickPixmapCache : public QObject

    Q_OBJECT

public:

    static QQuickPixmapCache *instance();

    ~QQuickPixmapCache() override;

    void unreferencePixmap(QQuickPixmapData *);

    void referencePixmap(QQuickPixmapData *);

    void purgeCache();

protected:

    void timerEvent(QTimerEvent *) override;

private:

    QQuickPixmapCache() = default;

    Q_DISABLE_COPY(QQuickPixmapCache)

    void shrinkCache(int remove);

    int destroyCache();

    qsizetype referencedCost() const;

private:

    QHash<QQuickPixmapKey, QQuickPixmapData *> m_cache;

    mutable QMutex m_cacheMutex; // avoid simultaneous iteration and modification

    QQuickPixmapData *m_unreferencedPixmaps = nullptr;

    QQuickPixmapData *m_lastUnreferencedPixmap = nullptr;

    int m_unreferencedCost = 0;

    int m_timerId = -1;

    bool m_destroying = false;

    friend class QQuickPixmap;

    friend class QQuickPixmapData;

    friend class tst_qquickpixmapcache;

    friend class tst_qquicktext;

    friend class tst_qquicktextedit;

};

QT_END_NAMESPACE

#endif // QQUICKPIXMAPCACHE_H