Implement SI-style (thin space) thoudands separator

1 files changed, 51 insertions, 2 deletions

diff --git a/src/qt/bitcoinunits.h b/src/qt/bitcoinunits.h
index 46517fc07b..a3017b9a8b 100644
--- a/src/qt/bitcoinunits.h
+++ b/src/qt/bitcoinunits.h
@@ -8,6 +8,37 @@
 #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"
+#define REAL_THIN_SP_HTML "&thinsp;"
+
+// U+200A HAIR SPACE = UTF-8 E2 80 8A
+#define HAIR_SP_CP 0x200A
+#define HAIR_SP_UTF8 "\xE2\x80\x8A"
+#define HAIR_SP_HTML "&#8202;"
+
+// U+2006 SIX-PER-EM SPACE = UTF-8 E2 80 86
+#define SIXPEREM_SP_CP 0x2006
+#define SIXPEREM_SP_UTF8 "\xE2\x80\x86"
+#define SIXPEREM_SP_HTML "&#8198;"
+
+// U+2007 FIGURE SPACE = UTF-8 E2 80 87
+#define FIGURE_SP_CP 0x2007
+#define FIGURE_SP_UTF8 "\xE2\x80\x87"
+#define FIGURE_SP_HTML "&#8199;"
+
+// 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
+
 /** Bitcoin unit definitions. Encapsulates parsing and formatting
    and serves as list model for drop-down selection boxes.
 */
@@ -28,6 +59,13 @@ public:
         uBTC
     };
 
+    enum SeparatorStyle
+    {
+        separatorNever,
+        separatorStandard,
+        separatorAlways
+    };
+
     //! @name Static API
     //! Unit conversion and formatting
     ///@{
@@ -49,9 +87,10 @@ public:
     //! Number of decimals left
     static int decimals(int unit);
     //! Format as string
-    static QString format(int unit, qint64 amount, bool plussign=false);
+    static QString format(int unit, qint64 amount, bool plussign=false, SeparatorStyle separators=separatorStandard, bool fAlign=false);
     //! Format as string (with unit)
-    static QString formatWithUnit(int unit, qint64 amount, bool plussign=false);
+    static QString formatWithUnit(int unit, qint64 amount, bool plussign=false, SeparatorStyle separators=separatorStandard, bool fAlign=false);
+    static QString formatHtmlWithUnit(int unit, qint64 amount, bool plussign=false, SeparatorStyle separators=separatorStandard);
     //! Parse string to coin amount
     static bool parse(int unit, const QString &value, qint64 *val_out);
     ///@}
@@ -67,6 +106,16 @@ public:
     QVariant data(const QModelIndex &index, int role) const;
     ///@}
 
+    static QString removeSpaces(QString text)
+    {
+        text.remove(' ');
+        text.remove(QChar(THIN_SP_CP));
+#if (THIN_SP_CP != REAL_THIN_SP_CP)
+        text.remove(QChar(REAL_THIN_SP_CP));
+#endif
+        return text;
+    }
+
 private:
     QList<BitcoinUnits::Unit> unitlist;
 };