src/common/quassel.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2005-2018 by the Quassel Project                        *
   3  *   devel@quassel-irc.org                                                 *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) version 3.                                           *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.         *
  19  ***************************************************************************/
  20
  21 #include "quassel.h"
  22
  23 #include <algorithm>
  24 #include <iostream>
  25
  26 #include <QCoreApplication>
  27 #include <QDateTime>
  28 #include <QDir>
  29 #include <QFileInfo>
  30 #include <QHostAddress>
  31 #include <QLibraryInfo>
  32 #include <QMetaEnum>
  33 #include <QSettings>
  34 #include <QTranslator>
  35 #include <QUuid>
  36
  37 #include "bufferinfo.h"
  38 #include "identity.h"
  39 #include "logger.h"
  40 #include "message.h"
  41 #include "network.h"
  42 #include "peer.h"
  43 #include "protocol.h"
  44 #include "syncableobject.h"
  45 #include "types.h"
  46 #include "version.h"
  47
  48 #ifndef Q_OS_WIN
  49 #    include "posixsignalwatcher.h"
  50 #else
  51 #    include "windowssignalwatcher.h"
  52 #endif
  53
  54 Quassel::Quassel()
  55     : Singleton<Quassel>{this}
  56     , _logger{new Logger{this}}
  57 {
  58 #ifdef EMBED_DATA
  59     Q_INIT_RESOURCE(i18n);
  60 #endif
  61 }
  62
  63 void Quassel::init(RunMode runMode)
  64 {
  65     _runMode = runMode;
  66
  67     qsrand(QTime(0, 0, 0).secsTo(QTime::currentTime()));
  68
  69     setupSignalHandling();
  70     setupEnvironment();
  71     registerMetaTypes();
  72
  73     // Initial translation (may be overridden in UI settings)
  74     loadTranslation(QLocale::system());
  75
  76     setupCliParser();
  77
  78     // Don't keep a debug log on the core
  79     logger()->setup(runMode != RunMode::CoreOnly);
  80
  81     Network::setDefaultCodecForServer("UTF-8");
  82     Network::setDefaultCodecForEncoding("UTF-8");
  83     Network::setDefaultCodecForDecoding("ISO-8859-15");
  84 }
  85
  86 Logger* Quassel::logger() const
  87 {
  88     return _logger;
  89 }
  90
  91 void Quassel::registerQuitHandler(QuitHandler handler)
  92 {
  93     instance()->_quitHandlers.emplace_back(std::move(handler));
  94 }
  95
  96 void Quassel::quit()
  97 {
  98     // Protect against multiple invocations (e.g. triggered by MainWin::closeEvent())
  99     if (!_quitting) {
 100         _quitting = true;
 101         qInfo() << "Quitting...";
 102         if (_quitHandlers.empty()) {
 103             QCoreApplication::quit();
 104         }
 105         else {
 106             // Note: We expect one of the registered handlers to call QCoreApplication::quit()
 107             for (auto&& handler : _quitHandlers) {
 108                 handler();
 109             }
 110         }
 111     }
 112 }
 113
 114 void Quassel::registerReloadHandler(ReloadHandler handler)
 115 {
 116     instance()->_reloadHandlers.emplace_back(std::move(handler));
 117 }
 118
 119 bool Quassel::reloadConfig()
 120 {
 121     bool result{true};
 122     for (auto&& handler : _reloadHandlers) {
 123         result = result && handler();
 124     }
 125     return result;
 126 }
 127
 128 //! Register our custom types with Qt's Meta Object System.
 129 /**  This makes them available for QVariant and in signals/slots, among other things.
 130  *
 131  */
 132 void Quassel::registerMetaTypes()
 133 {
 134     // Complex types
 135     qRegisterMetaType<Message>("Message");
 136     qRegisterMetaType<BufferInfo>("BufferInfo");
 137     qRegisterMetaType<NetworkInfo>("NetworkInfo");
 138     qRegisterMetaType<Network::Server>("Network::Server");
 139     qRegisterMetaType<Identity>("Identity");
 140
 141     qRegisterMetaTypeStreamOperators<Message>("Message");
 142     qRegisterMetaTypeStreamOperators<BufferInfo>("BufferInfo");
 143     qRegisterMetaTypeStreamOperators<NetworkInfo>("NetworkInfo");
 144     qRegisterMetaTypeStreamOperators<Network::Server>("Network::Server");
 145     qRegisterMetaTypeStreamOperators<Identity>("Identity");
 146
 147     qRegisterMetaType<IdentityId>("IdentityId");
 148     qRegisterMetaType<BufferId>("BufferId");
 149     qRegisterMetaType<NetworkId>("NetworkId");
 150     qRegisterMetaType<UserId>("UserId");
 151     qRegisterMetaType<AccountId>("AccountId");
 152     qRegisterMetaType<MsgId>("MsgId");
 153
 154     qRegisterMetaType<QHostAddress>("QHostAddress");
 155     qRegisterMetaTypeStreamOperators<QHostAddress>("QHostAddress");
 156     qRegisterMetaType<QUuid>("QUuid");
 157     qRegisterMetaTypeStreamOperators<QUuid>("QUuid");
 158
 159     qRegisterMetaTypeStreamOperators<IdentityId>("IdentityId");
 160     qRegisterMetaTypeStreamOperators<BufferId>("BufferId");
 161     qRegisterMetaTypeStreamOperators<NetworkId>("NetworkId");
 162     qRegisterMetaTypeStreamOperators<UserId>("UserId");
 163     qRegisterMetaTypeStreamOperators<AccountId>("AccountId");
 164     qRegisterMetaTypeStreamOperators<MsgId>("MsgId");
 165
 166     qRegisterMetaType<Protocol::SessionState>("Protocol::SessionState");
 167     qRegisterMetaType<PeerPtr>("PeerPtr");
 168     qRegisterMetaTypeStreamOperators<PeerPtr>("PeerPtr");
 169
 170     // Versions of Qt prior to 4.7 didn't define QVariant as a meta type
 171     if (!QMetaType::type("QVariant")) {
 172         qRegisterMetaType<QVariant>("QVariant");
 173         qRegisterMetaTypeStreamOperators<QVariant>("QVariant");
 174     }
 175 }
 176
 177 void Quassel::setupEnvironment()
 178 {
 179     // On modern Linux systems, XDG_DATA_DIRS contains a list of directories containing application data. This
 180     // is, for example, used by Qt for finding icons and other things. In case Quassel is installed in a non-standard
 181     // prefix (or run from the build directory), it makes sense to add this to XDG_DATA_DIRS so we don't have to
 182     // hack extra search paths into various places.
 183 #ifdef Q_OS_UNIX
 184     QString xdgDataVar = QFile::decodeName(qgetenv("XDG_DATA_DIRS"));
 185     if (xdgDataVar.isEmpty())
 186         xdgDataVar = QLatin1String("/usr/local/share:/usr/share");  // sane defaults
 187
 188     QStringList xdgDirs = xdgDataVar.split(QLatin1Char(':'), QString::SkipEmptyParts);
 189
 190     // Add our install prefix (if we're not in a bindir, this just adds the current workdir)
 191     QString appDir = QCoreApplication::applicationDirPath();
 192     int binpos = appDir.lastIndexOf("/bin");
 193     if (binpos >= 0) {
 194         appDir.replace(binpos, 4, "/share");
 195         xdgDirs.append(appDir);
 196         // Also append apps/quassel, this is only for QIconLoader to find icons there
 197         xdgDirs.append(appDir + "/apps/quassel");
 198     }
 199     else
 200         xdgDirs.append(appDir);  // build directory is always the last fallback
 201
 202     xdgDirs.removeDuplicates();
 203
 204     qputenv("XDG_DATA_DIRS", QFile::encodeName(xdgDirs.join(":")));
 205 #endif
 206 }
 207
 208 void Quassel::setupBuildInfo()
 209 {
 210     BuildInfo buildInfo;
 211     buildInfo.applicationName = "quassel";
 212     buildInfo.coreApplicationName = "quasselcore";
 213     buildInfo.clientApplicationName = "quasselclient";
 214     buildInfo.organizationName = "Quassel Project";
 215     buildInfo.organizationDomain = "quassel-irc.org";
 216
 217     buildInfo.protocolVersion = 10;  // FIXME: deprecated, will be removed
 218
 219     buildInfo.baseVersion = QUASSEL_VERSION_STRING;
 220     buildInfo.generatedVersion = GIT_DESCRIBE;
 221
 222     // Check if we got a commit hash
 223     if (!QString(GIT_HEAD).isEmpty()) {
 224         buildInfo.commitHash = GIT_HEAD;
 225         // Set to Unix epoch, wrapped as a string for backwards-compatibility
 226         buildInfo.commitDate = QString::number(GIT_COMMIT_DATE);
 227     }
 228     else if (!QString(DIST_HASH).contains("Format")) {
 229         buildInfo.commitHash = DIST_HASH;
 230         // Leave as Unix epoch if set as Unix epoch, but don't force this for
 231         // backwards-compatibility with existing packaging/release tools that might set strings.
 232         buildInfo.commitDate = QString(DIST_DATE);
 233     }
 234
 235     // create a nice version string
 236     if (buildInfo.generatedVersion.isEmpty()) {
 237         if (!buildInfo.commitHash.isEmpty()) {
 238             // dist version
 239             buildInfo.plainVersionString = QString{"v%1 (dist-%2)"}.arg(buildInfo.baseVersion).arg(buildInfo.commitHash.left(7));
 240             buildInfo.fancyVersionString = QString{"v%1 (dist-<a href=\"https://github.com/quassel/quassel/commit/%3\">%2</a>)"}
 241                                                .arg(buildInfo.baseVersion)
 242                                                .arg(buildInfo.commitHash.left(7))
 243                                                .arg(buildInfo.commitHash);
 244         }
 245         else {
 246             // we only have a base version :(
 247             buildInfo.plainVersionString = QString{"v%1 (unknown revision)"}.arg(buildInfo.baseVersion);
 248         }
 249     }
 250     else {
 251         // analyze what we got from git-describe
 252         static const QRegExp rx{"(.*)-(\\d+)-g([0-9a-f]+)(-dirty)?$"};
 253         if (rx.exactMatch(buildInfo.generatedVersion)) {
 254             QString distance = rx.cap(2) == "0" ? QString{} : QString{"%1+%2 "}.arg(rx.cap(1), rx.cap(2));
 255             buildInfo.plainVersionString = QString{"v%1 (%2git-%3%4)"}.arg(buildInfo.baseVersion, distance, rx.cap(3), rx.cap(4));
 256             if (!buildInfo.commitHash.isEmpty()) {
 257                 buildInfo.fancyVersionString = QString{"v%1 (%2git-<a href=\"https://github.com/quassel/quassel/commit/%5\">%3</a>%4)"}
 258                                                    .arg(buildInfo.baseVersion, distance, rx.cap(3), rx.cap(4), buildInfo.commitHash);
 259             }
 260         }
 261         else {
 262             buildInfo.plainVersionString = QString{"v%1 (invalid revision)"}.arg(buildInfo.baseVersion);
 263         }
 264     }
 265     if (buildInfo.fancyVersionString.isEmpty()) {
 266         buildInfo.fancyVersionString = buildInfo.plainVersionString;
 267     }
 268
 269     instance()->_buildInfo = std::move(buildInfo);
 270 }
 271
 272 const Quassel::BuildInfo& Quassel::buildInfo()
 273 {
 274     return instance()->_buildInfo;
 275 }
 276
 277 void Quassel::setupSignalHandling()
 278 {
 279 #ifndef Q_OS_WIN
 280     _signalWatcher = new PosixSignalWatcher(this);
 281 #else
 282     _signalWatcher = new WindowsSignalWatcher(this);
 283 #endif
 284     connect(_signalWatcher, &AbstractSignalWatcher::handleSignal, this, &Quassel::handleSignal);
 285 }
 286
 287 void Quassel::handleSignal(AbstractSignalWatcher::Action action)
 288 {
 289     switch (action) {
 290     case AbstractSignalWatcher::Action::Reload:
 291         // Most applications use this as the 'configuration reload' command, e.g. nginx uses it for graceful reloading of processes.
 292         if (!_reloadHandlers.empty()) {
 293             qInfo() << "Reloading configuration";
 294             if (reloadConfig()) {
 295                 qInfo() << "Successfully reloaded configuration";
 296             }
 297         }
 298         break;
 299     case AbstractSignalWatcher::Action::Terminate:
 300         if (!_quitting) {
 301             quit();
 302         }
 303         else {
 304             qInfo() << "Already shutting down, ignoring signal";
 305         }
 306         break;
 307     case AbstractSignalWatcher::Action::HandleCrash:
 308         logBacktrace(instance()->coreDumpFileName());
 309         exit(EXIT_FAILURE);
 310     }
 311 }
 312
 313 Quassel::RunMode Quassel::runMode()
 314 {
 315     return instance()->_runMode;
 316 }
 317
 318 void Quassel::setupCliParser()
 319 {
 320     QList<QCommandLineOption> options;
 321
 322     // General options
 323     /// @todo Bring back --datadir to specify the database location independent of config
 324     if (runMode() == RunMode::ClientOnly) {
 325         options += {{"c", "configdir"}, tr("Specify the directory holding the client configuration."), tr("path")};
 326     }
 327     else {
 328         options += {{"c", "configdir"},
 329                     tr("Specify the directory holding configuration files, the SQlite database and the SSL certificate."),
 330                     tr("path")};
 331     }
 332
 333     // Client options
 334     if (runMode() != RunMode::CoreOnly) {
 335         options += {
 336             {"icontheme", tr("Override the system icon theme ('breeze' is recommended)."), tr("theme")},
 337             {"qss", tr("Load a custom application stylesheet."), tr("file.qss")},
 338             {"hidewindow", tr("Start the client minimized to the system tray.")},
 339         };
 340     }
 341
 342     // Core options
 343     if (runMode() != RunMode::ClientOnly) {
 344         options += {
 345             {"listen", tr("The address(es) quasselcore will listen on."), tr("<address>[,<address>[,...]]"), "::,0.0.0.0"},
 346             {{"p", "port"}, tr("The port quasselcore will listen at."), tr("port"), "4242"},
 347             {{"n", "norestore"}, tr("Don't restore last core's state.")},
 348             {"config-from-environment", tr("Load configuration from environment variables.")},
 349             {"select-backend", tr("Switch storage backend (migrating data if possible)."), tr("backendidentifier")},
 350             {"select-authenticator", tr("Select authentication backend."), tr("authidentifier")},
 351             {"add-user", tr("Starts an interactive session to add a new core user.")},
 352             {"change-userpass",
 353              tr("Starts an interactive session to change the password of the user identified by <username>."),
 354              tr("username")},
 355             {"strict-ident", tr("Use users' quasselcore username as ident reply. Ignores each user's configured ident setting.")},
 356             {"ident-daemon", tr("Enable internal ident daemon.")},
 357             {"ident-port",
 358              tr("The port quasselcore will listen at for ident requests. Only meaningful with --ident-daemon."),
 359              tr("port"),
 360              "10113"},
 361             {"oidentd", tr("Enable oidentd integration. In most cases you should also enable --strict-ident.")},
 362             {"oidentd-conffile", tr("Set path to oidentd configuration file."), tr("file")},
 363 #ifdef HAVE_SSL
 364             {"require-ssl", tr("Require SSL for remote (non-loopback) client connections.")},
 365             {"ssl-cert", tr("Specify the path to the SSL certificate."), tr("path"), "configdir/quasselCert.pem"},
 366             {"ssl-key", tr("Specify the path to the SSL key."), tr("path"), "ssl-cert-path"},
 367 #endif
 368         };
 369     }
 370
 371     // Logging options
 372     options += {
 373         {{"L", "loglevel"}, tr("Supports one of Debug|Info|Warning|Error; default is Info."), tr("level"), "Info"},
 374         {{"l", "logfile"}, tr("Log to a file."), "path"},
 375 #ifdef HAVE_SYSLOG
 376         {"syslog", tr("Log to syslog.")},
 377 #endif
 378     };
 379
 380     // Debug options
 381     options += {{"d", "debug"}, tr("Enable debug output.")};
 382     if (runMode() != RunMode::CoreOnly) {
 383         options += {
 384             {"debugbufferswitches", tr("Enables debugging for bufferswitches.")},
 385             {"debugmodel", tr("Enables debugging for models.")},
 386         };
 387     }
 388     if (runMode() != RunMode::ClientOnly) {
 389         options += {
 390             {"debug-irc", tr("Enable logging of all raw IRC messages to debug log, including passwords!  In most cases you should also set --loglevel Debug")},
 391             {"debug-irc-id", tr("Limit raw IRC logging to this network ID.  Implies --debug-irc"), tr("database network ID"), "-1"},
 392         };
 393     }
 394
 395     _cliParser.addOptions(options);
 396     _cliParser.addHelpOption();
 397     _cliParser.addVersionOption();
 398     _cliParser.setApplicationDescription(tr("Quassel IRC is a modern, distributed IRC client."));
 399
 400     // This will call ::exit() for --help, --version and in case of errors
 401     _cliParser.process(*QCoreApplication::instance());
 402 }
 403
 404 QString Quassel::optionValue(const QString& key)
 405 {
 406     return instance()->_cliParser.value(key);
 407 }
 408
 409 bool Quassel::isOptionSet(const QString& key)
 410 {
 411     return instance()->_cliParser.isSet(key);
 412 }
 413
 414 const QString& Quassel::coreDumpFileName()
 415 {
 416     if (_coreDumpFileName.isEmpty()) {
 417         QDir configDir(configDirPath());
 418         _coreDumpFileName = configDir.absoluteFilePath(
 419             QString("Quassel-Crash-%1.log").arg(QDateTime::currentDateTime().toString("yyyyMMdd-hhmm")));
 420         QFile dumpFile(_coreDumpFileName);
 421         dumpFile.open(QIODevice::Append);
 422         QTextStream dumpStream(&dumpFile);
 423         dumpStream << "Quassel IRC: " << _buildInfo.baseVersion << ' ' << _buildInfo.commitHash << '\n';
 424         qDebug() << "Quassel IRC: " << _buildInfo.baseVersion << ' ' << _buildInfo.commitHash;
 425         dumpStream.flush();
 426         dumpFile.close();
 427     }
 428     return _coreDumpFileName;
 429 }
 430
 431 QString Quassel::configDirPath()
 432 {
 433     if (!instance()->_configDirPath.isEmpty())
 434         return instance()->_configDirPath;
 435
 436     QString path;
 437     if (isOptionSet("configdir")) {
 438         path = Quassel::optionValue("configdir");
 439     }
 440     else {
 441 #ifdef Q_OS_MAC
 442         // On Mac, the path is always the same
 443         path = QDir::homePath() + "/Library/Application Support/Quassel/";
 444 #else
 445         // We abuse QSettings to find us a sensible path on the other platforms
 446 #    ifdef Q_OS_WIN
 447         // don't use the registry
 448         QSettings::Format format = QSettings::IniFormat;
 449 #    else
 450         QSettings::Format format = QSettings::NativeFormat;
 451 #    endif
 452         QSettings s(format, QSettings::UserScope, QCoreApplication::organizationDomain(), buildInfo().applicationName);
 453         QFileInfo fileInfo(s.fileName());
 454         path = fileInfo.dir().absolutePath();
 455 #endif /* Q_OS_MAC */
 456     }
 457
 458     path = QFileInfo{path}.absoluteFilePath();
 459
 460     if (!path.endsWith(QDir::separator()) && !path.endsWith('/'))
 461         path += QDir::separator();
 462
 463     QDir qDir{path};
 464     if (!qDir.exists(path)) {
 465         if (!qDir.mkpath(path)) {
 466             qCritical() << "Unable to create Quassel config directory:" << qPrintable(qDir.absolutePath());
 467             return {};
 468         }
 469     }
 470
 471     instance()->_configDirPath = path;
 472     return path;
 473 }
 474
 475 QStringList Quassel::dataDirPaths()
 476 {
 477     if (!instance()->_dataDirPaths.isEmpty())
 478         return instance()->_dataDirPaths;
 479
 480     // TODO: Migrate to QStandardPaths (will require moving of the sqlite database,
 481     //       or a fallback for it being in the config dir)
 482
 483     QStringList dataDirNames;
 484 #ifdef Q_OS_WIN
 485     dataDirNames << qgetenv("APPDATA") + QCoreApplication::organizationDomain() + "/share/apps/quassel/"
 486                  << qgetenv("APPDATA") + QCoreApplication::organizationDomain() << QCoreApplication::applicationDirPath();
 487 #elif defined Q_OS_MAC
 488     dataDirNames << QDir::homePath() + "/Library/Application Support/Quassel/" << QCoreApplication::applicationDirPath();
 489 #else
 490     // Linux et al
 491
 492     // XDG_DATA_HOME is the location for users to override system-installed files, usually in .local/share
 493     // This should thus come first.
 494     QString xdgDataHome = QFile::decodeName(qgetenv("XDG_DATA_HOME"));
 495     if (xdgDataHome.isEmpty())
 496         xdgDataHome = QDir::homePath() + QLatin1String("/.local/share");
 497     dataDirNames << xdgDataHome;
 498
 499     // Now whatever is configured through XDG_DATA_DIRS
 500     QString xdgDataDirs = QFile::decodeName(qgetenv("XDG_DATA_DIRS"));
 501     if (xdgDataDirs.isEmpty())
 502         dataDirNames << "/usr/local/share"
 503                      << "/usr/share";
 504     else
 505         dataDirNames << xdgDataDirs.split(':', QString::SkipEmptyParts);
 506
 507     // Just in case, also check our install prefix
 508     dataDirNames << QCoreApplication::applicationDirPath() + "/../share";
 509
 510     // Normalize and append our application name
 511     for (int i = 0; i < dataDirNames.count(); i++)
 512         dataDirNames[i] = QDir::cleanPath(dataDirNames.at(i)) + "/quassel/";
 513
 514 #endif
 515
 516     // Add resource path and workdir just in case.
 517     // Workdir should have precedence
 518     dataDirNames.prepend(QCoreApplication::applicationDirPath() + "/data/");
 519     dataDirNames.append(":/data/");
 520
 521     // Append trailing '/' and check for existence
 522     auto iter = dataDirNames.begin();
 523     while (iter != dataDirNames.end()) {
 524         if (!iter->endsWith(QDir::separator()) && !iter->endsWith('/'))
 525             iter->append(QDir::separator());
 526         if (!QFile::exists(*iter))
 527             iter = dataDirNames.erase(iter);
 528         else
 529             ++iter;
 530     }
 531
 532     dataDirNames.removeDuplicates();
 533
 534     instance()->_dataDirPaths = dataDirNames;
 535     return dataDirNames;
 536 }
 537
 538 QString Quassel::findDataFilePath(const QString& fileName)
 539 {
 540     QStringList dataDirs = dataDirPaths();
 541     foreach (QString dataDir, dataDirs) {
 542         QString path = dataDir + fileName;
 543         if (QFile::exists(path))
 544             return path;
 545     }
 546     return QString();
 547 }
 548
 549 QStringList Quassel::scriptDirPaths()
 550 {
 551     QStringList res(configDirPath() + "scripts/");
 552     foreach (QString path, dataDirPaths())
 553         res << path + "scripts/";
 554     return res;
 555 }
 556
 557 QString Quassel::translationDirPath()
 558 {
 559     if (instance()->_translationDirPath.isEmpty()) {
 560         // We support only one translation dir; fallback mechanisms wouldn't work else.
 561         // This means that if we have a $data/translations dir, the internal :/i18n resource won't be considered.
 562         foreach (const QString& dir, dataDirPaths()) {
 563             if (QFile::exists(dir + "translations/")) {
 564                 instance()->_translationDirPath = dir + "translations/";
 565                 break;
 566             }
 567         }
 568         if (instance()->_translationDirPath.isEmpty())
 569             instance()->_translationDirPath = ":/i18n/";
 570     }
 571     return instance()->_translationDirPath;
 572 }
 573
 574 void Quassel::loadTranslation(const QLocale& locale)
 575 {
 576     auto* qtTranslator = QCoreApplication::instance()->findChild<QTranslator*>("QtTr");
 577     auto* quasselTranslator = QCoreApplication::instance()->findChild<QTranslator*>("QuasselTr");
 578
 579     if (qtTranslator)
 580         qApp->removeTranslator(qtTranslator);
 581     if (quasselTranslator)
 582         qApp->removeTranslator(quasselTranslator);
 583
 584     // We use QLocale::C to indicate that we don't want a translation
 585     if (locale.language() == QLocale::C)
 586         return;
 587
 588     qtTranslator = new QTranslator(qApp);
 589     qtTranslator->setObjectName("QtTr");
 590
 591     quasselTranslator = new QTranslator(qApp);
 592     quasselTranslator->setObjectName("QuasselTr");
 593
 594 #ifndef Q_OS_MAC
 595     bool success = qtTranslator->load(locale, QString("qt_"), translationDirPath());
 596     if (!success)
 597         qtTranslator->load(locale, QString("qt_"), QLibraryInfo::location(QLibraryInfo::TranslationsPath));
 598     quasselTranslator->load(locale, QString(""), translationDirPath());
 599 #else
 600     bool success = qtTranslator->load(QString("qt_%1").arg(locale.name()), translationDirPath());
 601     if (!success)
 602         qtTranslator->load(QString("qt_%1").arg(locale.name()), QLibraryInfo::location(QLibraryInfo::TranslationsPath));
 603     quasselTranslator->load(QString("%1").arg(locale.name()), translationDirPath());
 604 #endif
 605
 606     qApp->installTranslator(quasselTranslator);
 607     qApp->installTranslator(qtTranslator);
 608 }
 609
 610 // ---- Quassel::Features ---------------------------------------------------------------------------------------------
 611
 612 Quassel::Features::Features()
 613 {
 614     QStringList features;
 615
 616     // TODO Qt5: Use QMetaEnum::fromType()
 617     auto featureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("Feature"));
 618     _features.resize(featureEnum.keyCount(), true);  // enable all known features to true
 619 }
 620
 621 Quassel::Features::Features(const QStringList& features, LegacyFeatures legacyFeatures)
 622 {
 623     // TODO Qt5: Use QMetaEnum::fromType()
 624     auto featureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("Feature"));
 625     _features.resize(featureEnum.keyCount(), false);
 626
 627     for (auto&& feature : features) {
 628         int i = featureEnum.keyToValue(qPrintable(feature));
 629         if (i >= 0) {
 630             _features[i] = true;
 631         }
 632         else {
 633             _unknownFeatures << feature;
 634         }
 635     }
 636
 637     if (legacyFeatures) {
 638         // TODO Qt5: Use QMetaEnum::fromType()
 639         auto legacyFeatureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("LegacyFeature"));
 640         for (quint32 mask = 0x0001; mask <= 0x8000; mask <<= 1) {
 641             if (static_cast<quint32>(legacyFeatures) & mask) {
 642                 int i = featureEnum.keyToValue(legacyFeatureEnum.valueToKey(mask));
 643                 if (i >= 0) {
 644                     _features[i] = true;
 645                 }
 646             }
 647         }
 648     }
 649 }
 650
 651 bool Quassel::Features::isEnabled(Feature feature) const
 652 {
 653     auto i = static_cast<size_t>(feature);
 654     return i < _features.size() ? _features[i] : false;
 655 }
 656
 657 QStringList Quassel::Features::toStringList(bool enabled) const
 658 {
 659     // Check if any feature is enabled
 660     if (!enabled && std::all_of(_features.cbegin(), _features.cend(), [](bool feature) { return !feature; })) {
 661         return QStringList{} << "NoFeatures";
 662     }
 663
 664     QStringList result;
 665
 666     // TODO Qt5: Use QMetaEnum::fromType()
 667     auto featureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("Feature"));
 668     for (quint32 i = 0; i < _features.size(); ++i) {
 669         if (_features[i] == enabled) {
 670             result << featureEnum.key(i);
 671         }
 672     }
 673     return result;
 674 }
 675
 676 Quassel::LegacyFeatures Quassel::Features::toLegacyFeatures() const
 677 {
 678     // TODO Qt5: Use LegacyFeatures (flag operators for enum classes not supported in Qt4)
 679     quint32 result{0};
 680     // TODO Qt5: Use QMetaEnum::fromType()
 681     auto featureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("Feature"));
 682     auto legacyFeatureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("LegacyFeature"));
 683
 684     for (quint32 i = 0; i < _features.size(); ++i) {
 685         if (_features[i]) {
 686             int v = legacyFeatureEnum.keyToValue(featureEnum.key(i));
 687             if (v >= 0) {
 688                 result |= v;
 689             }
 690         }
 691     }
 692     return static_cast<LegacyFeatures>(result);
 693 }
 694
 695 QStringList Quassel::Features::unknownFeatures() const
 696 {
 697     return _unknownFeatures;
 698 }