RetroShare/retroshare-gui/src/util/misc.h

/****************************************************************
 * This file is distributed under the following license:
 *
 * Copyright (c) 2008, defnax
 * Copyright (C) 2006  Christophe Dumez
 *
 * 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) any later version.
 *
 * 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, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 *************************************************************************/

#ifndef MISC_H
#define MISC_H

#include <sstream>
#include <stdexcept>
#include <QObject>
#include <QPair>
#include <QThread>

#include "gui/settings/rsharesettings.h"

/*  Miscellaneaous functions that can be useful */
class misc : public QObject
{
    Q_OBJECT

 public:
    // Convert any type of variable to C++ String
    // convert=true will convert -1 to 0
    template <class T> static std::string toString(const T& x, bool convert=false) {
      std::ostringstream o;
      if(!(o<<x)) {
        throw std::runtime_error("::toString()");
      }
      if(o.str() == "-1" && convert)
        return "0";
      return o.str();
    }

    template <class T> static QString toQString(const T& x, bool convert=false) {
      std::ostringstream o;
      if(!(o<<x)) {
        throw std::runtime_error("::toString()");
      }
      if(o.str() == "-1" && convert)
        return QString::fromUtf8("0");
      return QString::fromUtf8(o.str().c_str());
    }

    template <class T> static QByteArray toQByteArray(const T& x, bool convert=false) {
      std::ostringstream o;
      if(!(o<<x)) {
        throw std::runtime_error("::toString()");
      }
      if(o.str() == "-1" && convert)
        return "0";
      return QByteArray(o.str().c_str());
    }

    // Convert C++ string to any type of variable
    template <class T> static T fromString(const std::string& s) {
      T x;
      std::istringstream i(s);
      if(!(i>>x)) {
        throw std::runtime_error("::fromString()");
      }
      return x;
    }

//     template <class T> static T fromQString::fromUtf8(const QString& s) {
//       T x;
//       std::istringstream i((const char*)s.toUtf8());
//       if(!(i>>x)) {
//         throw std::runtime_error("::fromString()");
//       }
//       return x;
//     }
// 
//     template <class T> static T fromQByteArray(const QByteArray& s) {
//       T x;
//       std::istringstream i((const char*)s);
//       if(!(i>>x)) {
//         throw std::runtime_error("::fromString()");
//       }
//       return x;
//     }

    // return best userfriendly storage unit (B, KiB, MiB, GiB, TiB)
    // use Binary prefix standards from IEC 60027-2
    // see http://en.wikipedia.org/wiki/Kilobyte
    // value must be given in bytes
    static QString friendlyUnit(float val);

    static bool isPreviewable(QString extension);

    // return qBittorrent config path
    static QString qBittorrentPath();

    static QString findFileInDir(QString dir_path, QString fileName);

    // Insertion sort, used instead of bubble sort because it is
    // approx. 5 times faster.
//    template <class T> static void insertSort(QList<QPair<int, T> > &list, const QPair<int, T>& value, Qt::SortOrder sortOrder) {
//      int i = 0;
//      if(sortOrder == Qt::AscendingOrder) {
//        while(i < list.size() and value.second > list.at(i).second) {
//          ++i;
//        }
//      }else{
//        while(i < list.size() and value.second < list.at(i).second) {
//          ++i;
//        }
//      }
//      list.insert(i, value);
//    }

//    template <class T> static void insertSort2(QList<QPair<int, T> > &list, const QPair<int, T>& value, Qt::SortOrder sortOrder) {
//      int i = 0;
//      if(sortOrder == Qt::AscendingOrder) {
//        while(i < list.size() and value.first > list.at(i).first) {
//          ++i;
//        }
//      }else{
//        while(i < list.size() and value.first < list.at(i).first) {
//          ++i;
//        }
//      }
//      list.insert(i, value);
//    }

    // Can't use template class for QString because >,< use unicode code for sorting
    // which is not what a human would expect when sorting strings.
    static void insertSortString(QList<QPair<int, QString> > &list, QPair<int, QString> value, Qt::SortOrder sortOrder);

    static float getPluginVersion(QString filePath);

    // Take a number of seconds and return an user-friendly
    // time duration like "1d 2h 10m".
    static QString userFriendlyDuration(qlonglong seconds);

    static QString userFriendlyUnit(double count, unsigned int decimal, double factor = 1000);

    static QString removeNewLine(const QString &text);
    static QString removeNewLine(const std::string &text);
    static QString removeNewLine(const std::wstring &text);

    static bool getOpenFileName(QWidget *parent, RshareSettings::enumLastDir type, const QString &caption, const QString &filter, QString &file);
    static bool getOpenFileNames(QWidget *parent, RshareSettings::enumLastDir type, const QString &caption, const QString &filter, QStringList &files);

    static bool getSaveFileName(QWidget *parent, RshareSettings::enumLastDir type, const QString &caption, const QString &filter, QString &file);
};

//  Trick to get a portable sleep() function
class SleeperThread : public QThread{
  public:
    static void msleep(unsigned long msecs)
    {
      QThread::msleep(msecs);
    }
};

#endif