bitcoinunits.h

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// Copyright (c) 2011-2020 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#ifndef BITCOIN_QT_BITCOINUNITS_H
#define BITCOIN_QT_BITCOINUNITS_H

#include <amount.h>

#include <QAbstractListModel>
#include <QString>

// U+2009 THIN SPACE = UTF-8 E2 80 89
#define REAL_THIN_SP_CP 0x2009
#define REAL_THIN_SP_UTF8 "\xE2\x80\x89"

// QMessageBox seems to have a bug whereby it doesn't display thin/hair spaces
// correctly.  Workaround is to display a space in a small font.  If you
// change this, please test that it doesn't cause the parent span to start
// wrapping.
#define HTML_HACK_SP "<span style='white-space: nowrap; font-size: 6pt'> </span>"

// Define THIN_SP_* variables to be our preferred type of thin space
#define THIN_SP_CP   REAL_THIN_SP_CP
#define THIN_SP_UTF8 REAL_THIN_SP_UTF8
#define THIN_SP_HTML HTML_HACK_SP

class BitcoinUnits: public QAbstractListModel
{
    Q_OBJECT

public:
    explicit BitcoinUnits(QObject *parent);

    enum Unit
    {
        BTC,
        mBTC,
        uBTC,
        SAT
    };

    enum class SeparatorStyle
    {
        NEVER,
        STANDARD,
        ALWAYS
    };


    static QList<Unit> availableUnits();
    static bool valid(int unit);
    static QString longName(int unit);
    static QString shortName(int unit);
    static QString description(int unit);
    static qint64 factor(int unit);
    static int decimals(int unit);
    static QString format(int unit, const CAmount& amount, bool plussign = false, SeparatorStyle separators = SeparatorStyle::STANDARD, bool justify = false);
    static QString formatWithUnit(int unit, const CAmount& amount, bool plussign=false, SeparatorStyle separators=SeparatorStyle::STANDARD);
    static QString formatHtmlWithUnit(int unit, const CAmount& amount, bool plussign=false, SeparatorStyle separators=SeparatorStyle::STANDARD);
    static QString formatWithPrivacy(int unit, const CAmount& amount, SeparatorStyle separators, bool privacy);
    static bool parse(int unit, const QString &value, CAmount *val_out);
    static QString getAmountColumnTitle(int unit);

    enum RoleIndex {
        UnitRole = Qt::UserRole
    };
    int rowCount(const QModelIndex &parent) const override;
    QVariant data(const QModelIndex &index, int role) const override;

    static QString removeSpaces(QString text)
    {
        text.remove(' ');
        text.remove(QChar(THIN_SP_CP));
        return text;
    }

    static CAmount maxMoney();

private:
    QList<BitcoinUnits::Unit> unitlist;
};
typedef BitcoinUnits::Unit BitcoinUnit;

#endif // BITCOIN_QT_BITCOINUNITS_H