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// Copyright (c) 2011-2013 The Bitcoin developers
// Distributed under the MIT/X11 software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include "bitcoinunits.h"
#include "primitives/transaction.h"
#include <QStringList>
BitcoinUnits::BitcoinUnits(QObject *parent):
QAbstractListModel(parent),
unitlist(availableUnits())
{
}
QList<BitcoinUnits::Unit> BitcoinUnits::availableUnits()
{
QList<BitcoinUnits::Unit> unitlist;
unitlist.append(BTC);
unitlist.append(mBTC);
unitlist.append(uBTC);
return unitlist;
}
bool BitcoinUnits::valid(int unit)
{
switch(unit)
{
case BTC:
case mBTC:
case uBTC:
return true;
default:
return false;
}
}
QString BitcoinUnits::id(int unit)
{
switch(unit)
{
case BTC: return QString("btc");
case mBTC: return QString("mbtc");
case uBTC: return QString("ubtc");
default: return QString("???");
}
}
QString BitcoinUnits::name(int unit)
{
switch(unit)
{
case BTC: return QString("BTC");
case mBTC: return QString("mBTC");
case uBTC: return QString::fromUtf8("μBTC");
default: return QString("???");
}
}
QString BitcoinUnits::description(int unit)
{
switch(unit)
{
case BTC: return QString("Bitcoins");
case mBTC: return QString("Milli-Bitcoins (1 / 1" THIN_SP_UTF8 "000)");
case uBTC: return QString("Micro-Bitcoins (1 / 1" THIN_SP_UTF8 "000" THIN_SP_UTF8 "000)");
default: return QString("???");
}
}
qint64 BitcoinUnits::factor(int unit)
{
switch(unit)
{
case BTC: return 100000000;
case mBTC: return 100000;
case uBTC: return 100;
default: return 100000000;
}
}
int BitcoinUnits::decimals(int unit)
{
switch(unit)
{
case BTC: return 8;
case mBTC: return 5;
case uBTC: return 2;
default: return 0;
}
}
QString BitcoinUnits::format(int unit, const CAmount& nIn, bool fPlus, SeparatorStyle separators)
{
// Note: not using straight sprintf here because we do NOT want
// localized number formatting.
if(!valid(unit))
return QString(); // Refuse to format invalid unit
qint64 n = (qint64)nIn;
qint64 coin = factor(unit);
int num_decimals = decimals(unit);
qint64 n_abs = (n > 0 ? n : -n);
qint64 quotient = n_abs / coin;
qint64 remainder = n_abs % coin;
QString quotient_str = QString::number(quotient);
QString remainder_str = QString::number(remainder).rightJustified(num_decimals, '0');
// Use SI-style thin space separators as these are locale independent and can't be
// confused with the decimal marker.
QChar thin_sp(THIN_SP_CP);
int q_size = quotient_str.size();
if (separators == separatorAlways || (separators == separatorStandard && q_size > 4))
for (int i = 3; i < q_size; i += 3)
quotient_str.insert(q_size - i, thin_sp);
if (n < 0)
quotient_str.insert(0, '-');
else if (fPlus && n > 0)
quotient_str.insert(0, '+');
return quotient_str + QString(".") + remainder_str;
}
// TODO: Review all remaining calls to BitcoinUnits::formatWithUnit to
// TODO: determine whether the output is used in a plain text context
// TODO: or an HTML context (and replace with
// TODO: BtcoinUnits::formatHtmlWithUnit in the latter case). Hopefully
// TODO: there aren't instances where the result could be used in
// TODO: either context.
// NOTE: Using formatWithUnit in an HTML context risks wrapping
// quantities at the thousands separator. More subtly, it also results
// in a standard space rather than a thin space, due to a bug in Qt's
// XML whitespace canonicalisation
//
// Please take care to use formatHtmlWithUnit instead, when
// appropriate.
QString BitcoinUnits::formatWithUnit(int unit, const CAmount& amount, bool plussign, SeparatorStyle separators)
{
return format(unit, amount, plussign, separators) + QString(" ") + name(unit);
}
QString BitcoinUnits::formatHtmlWithUnit(int unit, const CAmount& amount, bool plussign, SeparatorStyle separators)
{
QString str(formatWithUnit(unit, amount, plussign, separators));
str.replace(QChar(THIN_SP_CP), QString(THIN_SP_HTML));
return QString("<span style='white-space: nowrap;'>%1</span>").arg(str);
}
bool BitcoinUnits::parse(int unit, const QString &value, CAmount *val_out)
{
if(!valid(unit) || value.isEmpty())
return false; // Refuse to parse invalid unit or empty string
int num_decimals = decimals(unit);
// Ignore spaces and thin spaces when parsing
QStringList parts = removeSpaces(value).split(".");
if(parts.size() > 2)
{
return false; // More than one dot
}
QString whole = parts[0];
QString decimals;
if(parts.size() > 1)
{
decimals = parts[1];
}
if(decimals.size() > num_decimals)
{
return false; // Exceeds max precision
}
bool ok = false;
QString str = whole + decimals.leftJustified(num_decimals, '0');
if(str.size() > 18)
{
return false; // Longer numbers will exceed 63 bits
}
CAmount retvalue(str.toLongLong(&ok));
if(val_out)
{
*val_out = retvalue;
}
return ok;
}
QString BitcoinUnits::getAmountColumnTitle(int unit)
{
QString amountTitle = QObject::tr("Amount");
if (BitcoinUnits::valid(unit))
{
amountTitle += " ("+BitcoinUnits::name(unit) + ")";
}
return amountTitle;
}
int BitcoinUnits::rowCount(const QModelIndex &parent) const
{
Q_UNUSED(parent);
return unitlist.size();
}
QVariant BitcoinUnits::data(const QModelIndex &index, int role) const
{
int row = index.row();
if(row >= 0 && row < unitlist.size())
{
Unit unit = unitlist.at(row);
switch(role)
{
case Qt::EditRole:
case Qt::DisplayRole:
return QVariant(name(unit));
case Qt::ToolTipRole:
return QVariant(description(unit));
case UnitRole:
return QVariant(static_cast<int>(unit));
}
}
return QVariant();
}
CAmount BitcoinUnits::maxMoney()
{
return MAX_MONEY;
}
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