qqmlpropertyindex_p.h

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// 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
 
#ifndef QQMLPROPERTYINDEX_P_H
#define QQMLPROPERTYINDEX_P_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 <private/qglobal_p.h>
 
QT_BEGIN_NAMESPACE
 
class QQmlPropertyIndex
{
    qint32 index;
 
public:
    QQmlPropertyIndex()
    { index = -1; }
 
    static QQmlPropertyIndex fromEncoded(qint32 encodedIndex)
    {
        QQmlPropertyIndex idx;
        idx.index = encodedIndex;
        return idx;
    }
 
    explicit QQmlPropertyIndex(int coreIndex)
    { index = encode(coreIndex, -1); }
 
    explicit QQmlPropertyIndex(int coreIndex, int valueTypeIndex)
        : index(encode(coreIndex, valueTypeIndex))
    {}
 
    bool isValid() const
    { return index != -1; }
 
    int coreIndex() const
    {
        if (index == -1)
            return -1;
        return index & 0xffff;
    }
 
    int valueTypeIndex() const
    {
        if (index == -1)
            return -1;
        return (index >> 16) - 1;
    }
 
    bool hasValueTypeIndex() const
    {
        if (index == -1)
            return false;
        return index >> 16;
    }
 
    qint32 toEncoded() const
    { return index; }
 
    int intValue() const
    { return index; }
 
    bool operator==(const QQmlPropertyIndex &other) const
    { return index == other.index; }
 
    bool operator!=(const QQmlPropertyIndex &other) const
    { return !operator==(other); }
 
private:
    static qint32 encode(int coreIndex, int valueTypeIndex)
    {
        Q_ASSERT(coreIndex >= -1);
        Q_ASSERT(coreIndex <= 0xffff);
        Q_ASSERT(valueTypeIndex >= -1);
        Q_ASSERT(valueTypeIndex < 0xffff);
 
        if (coreIndex == -1)
            return -1;
        else
            return coreIndex | ((valueTypeIndex + 1) << 16);
    }
};
 
QT_END_NAMESPACE
 
#endif // QQMLPROPERTYINDEX_P_H