1 // Copyright (c) 2011-2013 The Bitcoin Core developers
2 // Distributed under the MIT software license, see the accompanying
3 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
5 #include "bitcoinunits.h"
7 #include "primitives/transaction.h"
11 BitcoinUnits::BitcoinUnits(QObject *parent):
12 QAbstractListModel(parent),
13 unitlist(availableUnits())
17 QList<BitcoinUnits::Unit> BitcoinUnits::availableUnits()
19 QList<BitcoinUnits::Unit> unitlist;
21 unitlist.append(mBTC);
22 unitlist.append(uBTC);
26 bool BitcoinUnits::valid(int unit)
39 QString BitcoinUnits::name(int unit)
43 case BTC: return QString("BTC");
44 case mBTC: return QString("mBTC");
45 case uBTC: return QString::fromUtf8("μBTC");
46 default: return QString("???");
50 QString BitcoinUnits::description(int unit)
54 case BTC: return QString("Bitcoins");
55 case mBTC: return QString("Milli-Bitcoins (1 / 1" THIN_SP_UTF8 "000)");
56 case uBTC: return QString("Micro-Bitcoins (1 / 1" THIN_SP_UTF8 "000" THIN_SP_UTF8 "000)");
57 default: return QString("???");
61 qint64 BitcoinUnits::factor(int unit)
65 case BTC: return 100000000;
66 case mBTC: return 100000;
67 case uBTC: return 100;
68 default: return 100000000;
72 int BitcoinUnits::decimals(int unit)
83 QString BitcoinUnits::format(int unit, const CAmount& nIn, bool fPlus, SeparatorStyle separators)
85 // Note: not using straight sprintf here because we do NOT want
86 // localized number formatting.
88 return QString(); // Refuse to format invalid unit
89 qint64 n = (qint64)nIn;
90 qint64 coin = factor(unit);
91 int num_decimals = decimals(unit);
92 qint64 n_abs = (n > 0 ? n : -n);
93 qint64 quotient = n_abs / coin;
94 qint64 remainder = n_abs % coin;
95 QString quotient_str = QString::number(quotient);
96 QString remainder_str = QString::number(remainder).rightJustified(num_decimals, '0');
98 // Use SI-style thin space separators as these are locale independent and can't be
99 // confused with the decimal marker.
100 QChar thin_sp(THIN_SP_CP);
101 int q_size = quotient_str.size();
102 if (separators == separatorAlways || (separators == separatorStandard && q_size > 4))
103 for (int i = 3; i < q_size; i += 3)
104 quotient_str.insert(q_size - i, thin_sp);
107 quotient_str.insert(0, '-');
108 else if (fPlus && n > 0)
109 quotient_str.insert(0, '+');
110 return quotient_str + QString(".") + remainder_str;
114 // TODO: Review all remaining calls to BitcoinUnits::formatWithUnit to
115 // TODO: determine whether the output is used in a plain text context
116 // TODO: or an HTML context (and replace with
117 // TODO: BtcoinUnits::formatHtmlWithUnit in the latter case). Hopefully
118 // TODO: there aren't instances where the result could be used in
119 // TODO: either context.
121 // NOTE: Using formatWithUnit in an HTML context risks wrapping
122 // quantities at the thousands separator. More subtly, it also results
123 // in a standard space rather than a thin space, due to a bug in Qt's
124 // XML whitespace canonicalisation
126 // Please take care to use formatHtmlWithUnit instead, when
129 QString BitcoinUnits::formatWithUnit(int unit, const CAmount& amount, bool plussign, SeparatorStyle separators)
131 return format(unit, amount, plussign, separators) + QString(" ") + name(unit);
134 QString BitcoinUnits::formatHtmlWithUnit(int unit, const CAmount& amount, bool plussign, SeparatorStyle separators)
136 QString str(formatWithUnit(unit, amount, plussign, separators));
137 str.replace(QChar(THIN_SP_CP), QString(THIN_SP_HTML));
138 return QString("<span style='white-space: nowrap;'>%1</span>").arg(str);
142 bool BitcoinUnits::parse(int unit, const QString &value, CAmount *val_out)
144 if(!valid(unit) || value.isEmpty())
145 return false; // Refuse to parse invalid unit or empty string
146 int num_decimals = decimals(unit);
148 // Ignore spaces and thin spaces when parsing
149 QStringList parts = removeSpaces(value).split(".");
153 return false; // More than one dot
155 QString whole = parts[0];
162 if(decimals.size() > num_decimals)
164 return false; // Exceeds max precision
167 QString str = whole + decimals.leftJustified(num_decimals, '0');
171 return false; // Longer numbers will exceed 63 bits
173 CAmount retvalue(str.toLongLong(&ok));
181 QString BitcoinUnits::getAmountColumnTitle(int unit)
183 QString amountTitle = QObject::tr("Amount");
184 if (BitcoinUnits::valid(unit))
186 amountTitle += " ("+BitcoinUnits::name(unit) + ")";
191 int BitcoinUnits::rowCount(const QModelIndex &parent) const
194 return unitlist.size();
197 QVariant BitcoinUnits::data(const QModelIndex &index, int role) const
199 int row = index.row();
200 if(row >= 0 && row < unitlist.size())
202 Unit unit = unitlist.at(row);
206 case Qt::DisplayRole:
207 return QVariant(name(unit));
208 case Qt::ToolTipRole:
209 return QVariant(description(unit));
211 return QVariant(static_cast<int>(unit));
217 CAmount BitcoinUnits::maxMoney()