File indexing completed on 2024-05-19 05:49:21

 /***************************************************************************
  *   Copyright © 2015 Harald Sitter <sitter@kde.org>                       *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or         *
  *   modify it under the terms of the GNU General Public License as        *
  *   published by the Free Software Foundation; either version 2 of        *
  *   the License or (at your option) version 3 or any later version        *
  *   accepted by the membership of KDE e.V. (or its successor approved     *
  *   by the membership of KDE e.V.), which shall act as a proxy            *
  *   defined in Section 14 of version 3 of the license.                    *
  *                                                                         *
  *   This program is distributed in the hope that it will be useful,       *
  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  *   GNU General Public License for more details.                          *
  *                                                                         *
  *   You should have received a copy of the GNU General Public License     *
  *   along with this program.  If not, see <http://www.gnu.org/licenses/>. *
  ***************************************************************************/
 
 #include "locale.h"
 
 #include <algorithm>
 
 Locale::Locale(const QString &locale)
     : m_language(QString())
     , m_country(QString())
     , m_variant(QString())
     , m_encoding(QString())
 {
     QString tmp = locale;
     QStringList parts;
 
     parts = tmp.split(QChar('.'));
     if (parts.size() > 1) {
         m_encoding = parts.last();
     }
     tmp = parts.first();
 
     parts = tmp.split(QChar('@'));
     if (parts.size() > 1) {
         m_variant = parts.last();
     }
     tmp = parts.first();
 
     parts = tmp.split(QChar('_'));
     if (parts.size() > 1) {
         m_country = parts.last();
     }
     m_language = parts.first();
 }
 
 // This function returns a combination of possible locale values.
 // The way this works is that it fills a list with all possibly combination on
 // top of language. All combiners can return a noop version of the string
 // passed into the combiner if the combinee is empty. This ultimately results
 // in duplicated entries (e.g. if variant is empty the list would contain
 // language and langauge.encoding twice as their respective variantified version
 // comes back without variant).
 // Once all combinations are attempted the by-design-duplicates are removed
 // and we have a nice clean list of language combinations.
 // This has slight overhead since we are partially working with duplicated
 // strings at times, it does however need substantially less code and less
 // iffing.
 QStringList Locale::combinations()
 {
     QStringList list;
     // language_country@variant.encoding
     // language_country@variant
     // language@variant.encoding
     // language@variant
     // language_country.encoding
     // language_country
     // language.encoding
     // language
     // ^ all built in reverse order for improved readability
     QString tmp;
     if (!m_language.isEmpty()) {
         list << (tmp = m_language);
         list << encodify(tmp);
 
         list << (tmp = countryfy(m_language));
         list << encodify(tmp);
 
         list << (tmp = variantify(m_language));
         list << encodify(tmp);
 
         list << (tmp = variantify(countryfy(m_language)));
         list << encodify(tmp);
     }
     list.removeDuplicates();
     std::reverse(std::begin(list), std::end(list));
     return list;
 }
 
 QString Locale::countryfy(const QString &str)
 {
     if (m_country.isEmpty())
         return str;
     return str + '_' + m_country;
 }
 
 QString Locale::variantify(const QString &str)
 {
     if (m_variant.isEmpty())
         return str;
     return str + '@' + m_variant;
 }
 
 QString Locale::encodify(const QString &str)
 {
     if (m_encoding.isEmpty())
         return str;
     return str + '.' + m_encoding;
 }