[libcalamares] Add a model of timezone regions

src/libcalamares/locale/TimeZone.cpp

@@ -18,8 +18,14 @@
 
 #include "TimeZone.h"
 
+#include <QFile>
+#include <QStringList>
+#include <QTextStream>
+
 #include <cstring>
 
+static const char TZ_DATA_FILE[] = "/usr/share/zoneinfo/zone.tab";
+
 namespace CalamaresUtils
 {
 namespace Locale
@@ -27,6 +33,8 @@ namespace Locale
 
 
 CStringPair::CStringPair( CStringPair&& t )
+    : m_human( nullptr )
+    , m_key( nullptr )
 {
     // My pointers are initialized to nullptr
     std::swap( m_human, t.m_human );
@@ -94,5 +102,83 @@ TZZone::tr() const
     return QObject::tr( m_human, "tz_names" );
 }
 
+TZRegionModel::TZRegionModel()
+{
+
+    QFile file( TZ_DATA_FILE );
+    if ( !file.open( QIODevice::ReadOnly | QIODevice::Text ) )
+    {
+        return;
+    }
+
+    QStringList regions;
+
+    QTextStream in( &file );
+    while ( !in.atEnd() )
+    {
+        QString line = in.readLine().trimmed().split( '#', QString::KeepEmptyParts ).first().trimmed();
+        if ( line.isEmpty() )
+        {
+            continue;
+        }
+
+        QStringList list = line.split( QRegExp( "[\t ]" ), QString::SkipEmptyParts );
+        if ( list.size() < 3 )
+        {
+            continue;
+        }
+
+        QStringList timezoneParts = list.at( 2 ).split( '/', QString::SkipEmptyParts );
+        if ( timezoneParts.size() < 2 )
+        {
+            continue;
+        }
+
+        QString region = timezoneParts.first().trimmed();
+        ;
+        if ( region.isEmpty() )
+        {
+            continue;
+        }
+
+        if ( !regions.contains( region ) )
+        {
+            regions.append( region );
+        }
+    }
+
+    m_regions.reserve( regions.length() );
+    for ( int i = 0; i < regions.length(); ++i )
+    {
+        m_regions.append( TZRegion( regions[ i ].toUtf8().data() ) );
+    }
+}
+
+TZRegionModel::~TZRegionModel() {}
+
+int
+TZRegionModel::rowCount( const QModelIndex& parent ) const
+{
+    return m_regions.count();
+}
+
+QVariant
+TZRegionModel::data( const QModelIndex& index, int role ) const
+{
+    if ( role != LabelRole )
+    {
+        return QVariant();
+    }
+
+    if ( !index.isValid() )
+    {
+        return QVariant();
+    }
+
+    const TZRegion& region = m_regions.at( index.row() );
+    return region.tr();
+}
+
+
 }  // namespace Locale
 }  // namespace CalamaresUtils

src/libcalamares/locale/TimeZone.h

@@ -19,6 +19,9 @@
 #ifndef LOCALE_TIMEZONE_H
 #define LOCALE_TIMEZONE_H
 
+#include "DllMacro.h"
+
+#include <QAbstractListModel>
 #include <QObject>
 #include <QString>
 
@@ -72,6 +75,26 @@ public:
     QString tr() const override;
 };
 
+class DLLEXPORT TZRegionModel : public QAbstractListModel
+{
+public:
+    enum
+    {
+        LabelRole = Qt::DisplayRole
+    };
+
+    /// @brief Create from the zone.tab file
+    TZRegionModel();
+    virtual ~TZRegionModel() override;
+
+    int rowCount( const QModelIndex& parent ) const override;
+
+    QVariant data( const QModelIndex& index, int role ) const override;
+
+private:
+    QVector< TZRegion > m_regions;
+};
+
 }  // namespace Locale
 }  // namespace CalamaresUtils