qpageranges.h

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// Copyright (C) 2020 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 QPAGERANGES_H
#define QPAGERANGES_H
 
#include <QtGui/qtguiglobal.h>
#include <QtCore/qstring.h>
#include <QtCore/qlist.h>
#include <QtCore/qshareddata.h>
#include <QtCore/qmetatype.h>
 
QT_BEGIN_NAMESPACE
 
class QDebug;
class QDataStream;
class QPageRangesPrivate;
QT_DECLARE_QESDP_SPECIALIZATION_DTOR_WITH_EXPORT(QPageRangesPrivate, Q_GUI_EXPORT)
 
class Q_GUI_EXPORT QPageRanges
{
public:
    QPageRanges();
    ~QPageRanges();
 
    QPageRanges(const QPageRanges &other) noexcept;
    QPageRanges &operator=(const QPageRanges &other) noexcept;
 
    QPageRanges(QPageRanges &&other) noexcept = default;
    QT_MOVE_ASSIGNMENT_OPERATOR_IMPL_VIA_PURE_SWAP(QPageRanges)
    void swap(QPageRanges &other) noexcept
    { d.swap(other.d); }
 
    friend bool operator==(const QPageRanges &lhs, const QPageRanges &rhs) noexcept
    { return lhs.isEqual(rhs); }
    friend bool operator!=(const QPageRanges &lhs, const QPageRanges &rhs) noexcept
    { return !lhs.isEqual(rhs); }
 
    struct Range {
        int from = -1;
        int to = -1;
        bool contains(int pageNumber) const noexcept
        { return from <= pageNumber && to >= pageNumber; }
        friend bool operator==(Range lhs, Range rhs) noexcept
        { return lhs.from == rhs.from && lhs.to == rhs.to; }
        friend bool operator!=(Range lhs, Range rhs) noexcept
        { return !(lhs == rhs); }
        friend bool operator<(Range lhs, Range rhs) noexcept
        { return lhs.from < rhs.from || (!(rhs.from < lhs.from) && lhs.to < rhs.to); }
    };
 
    void addPage(int pageNumber);
    void addRange(int from, int to);
    QList<Range> toRangeList() const;
    void clear();
 
    QString toString() const;
    static QPageRanges fromString(const QString &ranges);
 
    bool contains(int pageNumber) const;
    bool isEmpty() const;
    int firstPage() const;
    int lastPage() const;
 
    void detach();
 
private:
    bool isEqual(const QPageRanges &other) const noexcept;
 
    QExplicitlySharedDataPointer<QPageRangesPrivate> d;
};
 
#ifndef QT_NO_DATASTREAM
Q_GUI_EXPORT QDataStream &operator<<(QDataStream &, const QPageRanges &);
Q_GUI_EXPORT QDataStream &operator>>(QDataStream &, QPageRanges &);
#endif
 
#ifndef QT_NO_DEBUG_STREAM
Q_GUI_EXPORT QDebug operator<<(QDebug dbg, const QPageRanges &pageRanges);
#endif
 
Q_DECLARE_SHARED(QPageRanges)
Q_DECLARE_TYPEINFO(QPageRanges::Range, Q_RELOCATABLE_TYPE);
 
QT_END_NAMESPACE
 
QT_DECL_METATYPE_EXTERN(QPageRanges, Q_GUI_EXPORT)
 
#endif // QPAGERANGES_H