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 <signal.h>
  27 #if !defined Q_OS_WIN && !defined Q_OS_MAC
  28 #  include <sys/types.h>
  29 #  include <sys/time.h>
  30 #  include <sys/resource.h>
  31 #endif
  32
  33 #include <QCoreApplication>
  34 #include <QDateTime>
  35 #include <QDir>
  36 #include <QFileInfo>
  37 #include <QHostAddress>
  38 #include <QLibraryInfo>
  39 #include <QMetaEnum>
  40 #include <QSettings>
  41 #include <QTranslator>
  42 #include <QUuid>
  43
  44 #include "bufferinfo.h"
  45 #include "identity.h"
  46 #include "logger.h"
  47 #include "message.h"
  48 #include "network.h"
  49 #include "peer.h"
  50 #include "protocol.h"
  51 #include "syncableobject.h"
  52 #include "types.h"
  53
  54 #include "../../version.h"
  55
  56 Quassel *Quassel::instance()
  57 {
  58     static Quassel instance;
  59     return &instance;
  60 }
  61
  62
  63 Quassel::Quassel()
  64 {
  65     // We catch SIGTERM and SIGINT (caused by Ctrl+C) to graceful shutdown Quassel.
  66     signal(SIGTERM, handleSignal);
  67     signal(SIGINT, handleSignal);
  68 #ifndef Q_OS_WIN
  69     // SIGHUP is used to reload configuration (i.e. SSL certificates)
  70     // Windows does not support SIGHUP
  71     signal(SIGHUP, handleSignal);
  72 #endif
  73 }
  74
  75
  76 bool Quassel::init()
  77 {
  78     if (instance()->_initialized)
  79         return true;  // allow multiple invocations because of MonolithicApplication
  80
  81     if (instance()->_handleCrashes) {
  82         // we have crashhandler for win32 and unix (based on execinfo).
  83 #if defined(Q_OS_WIN) || defined(HAVE_EXECINFO)
  84 # ifndef Q_OS_WIN
  85         // we only handle crashes ourselves if coredumps are disabled
  86         struct rlimit *limit = (rlimit *)malloc(sizeof(struct rlimit));
  87         int rc = getrlimit(RLIMIT_CORE, limit);
  88
  89         if (rc == -1 || !((long)limit->rlim_cur > 0 || limit->rlim_cur == RLIM_INFINITY)) {
  90 # endif /* Q_OS_WIN */
  91         signal(SIGABRT, handleSignal);
  92         signal(SIGSEGV, handleSignal);
  93 # ifndef Q_OS_WIN
  94         signal(SIGBUS, handleSignal);
  95     }
  96     free(limit);
  97 # endif /* Q_OS_WIN */
  98 #endif /* Q_OS_WIN || HAVE_EXECINFO */
  99     }
 100
 101     instance()->_initialized = true;
 102     qsrand(QTime(0, 0, 0).secsTo(QTime::currentTime()));
 103
 104     instance()->setupEnvironment();
 105     instance()->registerMetaTypes();
 106
 107     Network::setDefaultCodecForServer("UTF-8");
 108     Network::setDefaultCodecForEncoding("UTF-8");
 109     Network::setDefaultCodecForDecoding("ISO-8859-15");
 110
 111     if (isOptionSet("help")) {
 112         instance()->_cliParser->usage();
 113         return false;
 114     }
 115
 116     if (isOptionSet("version")) {
 117         std::cout << qPrintable("Quassel IRC: " + Quassel::buildInfo().plainVersionString) << std::endl;
 118         return false;
 119     }
 120
 121     // Set up logging
 122     if (isOptionSet("loglevel")) {
 123         QString level = optionValue("loglevel").toLower();
 124
 125         if (level == "debug")
 126             setLogLevel(DebugLevel);
 127         else if (level == "info")
 128             setLogLevel(InfoLevel);
 129         else if (level == "warning")
 130             setLogLevel(WarningLevel);
 131         else if (level == "error")
 132             setLogLevel(ErrorLevel);
 133         else {
 134             qWarning() << qPrintable(tr("Invalid log level %1; supported are Debug|Info|Warning|Error").arg(level));
 135             return false;
 136         }
 137     }
 138
 139     QString logfilename = optionValue("logfile");
 140     if (!logfilename.isEmpty()) {
 141         instance()->_logFile.reset(new QFile{logfilename});
 142         if (!logFile()->open(QIODevice::Append | QIODevice::Text)) {
 143             qWarning() << qPrintable(tr("Could not open log file \"%1\": %2").arg(logfilename, logFile()->errorString()));
 144             instance()->_logFile.reset();
 145         }
 146     }
 147 #ifdef HAVE_SYSLOG
 148     instance()->_logToSyslog = isOptionSet("syslog");
 149 #endif
 150
 151 #if QT_VERSION < 0x050000
 152     qInstallMsgHandler(Logger::logMessage);
 153 #else
 154     qInstallMessageHandler(Logger::logMessage);
 155 #endif
 156
 157     return true;
 158 }
 159
 160
 161 void Quassel::destroy()
 162 {
 163     if (logFile()) {
 164         logFile()->close();
 165         instance()->_logFile.reset();
 166     }
 167 }
 168
 169
 170 void Quassel::registerQuitHandler(QuitHandler handler)
 171 {
 172     instance()->_quitHandlers.emplace_back(std::move(handler));
 173 }
 174
 175 void Quassel::quit()
 176 {
 177     if (_quitHandlers.empty()) {
 178         QCoreApplication::quit();
 179     }
 180     else {
 181         for (auto &&handler : _quitHandlers) {
 182             handler();
 183         }
 184     }
 185 }
 186
 187
 188 void Quassel::registerReloadHandler(ReloadHandler handler)
 189 {
 190     instance()->_reloadHandlers.emplace_back(std::move(handler));
 191 }
 192
 193
 194 bool Quassel::reloadConfig()
 195 {
 196     bool result{true};
 197     for (auto &&handler : _reloadHandlers) {
 198         result = result && handler();
 199     }
 200     return result;
 201 }
 202
 203
 204 //! Register our custom types with Qt's Meta Object System.
 205 /**  This makes them available for QVariant and in signals/slots, among other things.
 206 *
 207 */
 208 void Quassel::registerMetaTypes()
 209 {
 210     // Complex types
 211     qRegisterMetaType<Message>("Message");
 212     qRegisterMetaType<BufferInfo>("BufferInfo");
 213     qRegisterMetaType<NetworkInfo>("NetworkInfo");
 214     qRegisterMetaType<Network::Server>("Network::Server");
 215     qRegisterMetaType<Identity>("Identity");
 216
 217     qRegisterMetaTypeStreamOperators<Message>("Message");
 218     qRegisterMetaTypeStreamOperators<BufferInfo>("BufferInfo");
 219     qRegisterMetaTypeStreamOperators<NetworkInfo>("NetworkInfo");
 220     qRegisterMetaTypeStreamOperators<Network::Server>("Network::Server");
 221     qRegisterMetaTypeStreamOperators<Identity>("Identity");
 222
 223     qRegisterMetaType<IdentityId>("IdentityId");
 224     qRegisterMetaType<BufferId>("BufferId");
 225     qRegisterMetaType<NetworkId>("NetworkId");
 226     qRegisterMetaType<UserId>("UserId");
 227     qRegisterMetaType<AccountId>("AccountId");
 228     qRegisterMetaType<MsgId>("MsgId");
 229
 230     qRegisterMetaType<QHostAddress>("QHostAddress");
 231     qRegisterMetaTypeStreamOperators<QHostAddress>("QHostAddress");
 232     qRegisterMetaType<QUuid>("QUuid");
 233     qRegisterMetaTypeStreamOperators<QUuid>("QUuid");
 234
 235     qRegisterMetaTypeStreamOperators<IdentityId>("IdentityId");
 236     qRegisterMetaTypeStreamOperators<BufferId>("BufferId");
 237     qRegisterMetaTypeStreamOperators<NetworkId>("NetworkId");
 238     qRegisterMetaTypeStreamOperators<UserId>("UserId");
 239     qRegisterMetaTypeStreamOperators<AccountId>("AccountId");
 240     qRegisterMetaTypeStreamOperators<MsgId>("MsgId");
 241
 242     qRegisterMetaType<Protocol::SessionState>("Protocol::SessionState");
 243     qRegisterMetaType<PeerPtr>("PeerPtr");
 244     qRegisterMetaTypeStreamOperators<PeerPtr>("PeerPtr");
 245
 246     // Versions of Qt prior to 4.7 didn't define QVariant as a meta type
 247     if (!QMetaType::type("QVariant")) {
 248         qRegisterMetaType<QVariant>("QVariant");
 249         qRegisterMetaTypeStreamOperators<QVariant>("QVariant");
 250     }
 251 }
 252
 253
 254 void Quassel::setupEnvironment()
 255 {
 256     // On modern Linux systems, XDG_DATA_DIRS contains a list of directories containing application data. This
 257     // is, for example, used by Qt for finding icons and other things. In case Quassel is installed in a non-standard
 258     // prefix (or run from the build directory), it makes sense to add this to XDG_DATA_DIRS so we don't have to
 259     // hack extra search paths into various places.
 260 #ifdef Q_OS_UNIX
 261     QString xdgDataVar = QFile::decodeName(qgetenv("XDG_DATA_DIRS"));
 262     if (xdgDataVar.isEmpty())
 263         xdgDataVar = QLatin1String("/usr/local/share:/usr/share"); // sane defaults
 264
 265     QStringList xdgDirs = xdgDataVar.split(QLatin1Char(':'), QString::SkipEmptyParts);
 266
 267     // Add our install prefix (if we're not in a bindir, this just adds the current workdir)
 268     QString appDir = QCoreApplication::applicationDirPath();
 269     int binpos = appDir.lastIndexOf("/bin");
 270     if (binpos >= 0) {
 271         appDir.replace(binpos, 4, "/share");
 272         xdgDirs.append(appDir);
 273         // Also append apps/quassel, this is only for QIconLoader to find icons there
 274         xdgDirs.append(appDir + "/apps/quassel");
 275     } else
 276         xdgDirs.append(appDir);  // build directory is always the last fallback
 277
 278     xdgDirs.removeDuplicates();
 279
 280     qputenv("XDG_DATA_DIRS", QFile::encodeName(xdgDirs.join(":")));
 281 #endif
 282 }
 283
 284
 285 void Quassel::setupBuildInfo()
 286 {
 287     BuildInfo buildInfo;
 288     buildInfo.applicationName = "quassel";
 289     buildInfo.coreApplicationName = "quasselcore";
 290     buildInfo.clientApplicationName = "quasselclient";
 291     buildInfo.organizationName = "Quassel Project";
 292     buildInfo.organizationDomain = "quassel-irc.org";
 293
 294     buildInfo.protocolVersion = 10; // FIXME: deprecated, will be removed
 295
 296     buildInfo.baseVersion = QUASSEL_VERSION_STRING;
 297     buildInfo.generatedVersion = GIT_DESCRIBE;
 298
 299     // Check if we got a commit hash
 300     if (!QString(GIT_HEAD).isEmpty()) {
 301         buildInfo.commitHash = GIT_HEAD;
 302         // Set to Unix epoch, wrapped as a string for backwards-compatibility
 303         buildInfo.commitDate = QString::number(GIT_COMMIT_DATE);
 304     }
 305     else if (!QString(DIST_HASH).contains("Format")) {
 306         buildInfo.commitHash = DIST_HASH;
 307         // Leave as Unix epoch if set as Unix epoch, but don't force this for
 308         // backwards-compatibility with existing packaging/release tools that might set strings.
 309         buildInfo.commitDate = QString(DIST_DATE);
 310     }
 311
 312     // create a nice version string
 313     if (buildInfo.generatedVersion.isEmpty()) {
 314         if (!buildInfo.commitHash.isEmpty()) {
 315             // dist version
 316             buildInfo.plainVersionString = QString{"v%1 (dist-%2)"}
 317                                                .arg(buildInfo.baseVersion)
 318                                                .arg(buildInfo.commitHash.left(7));
 319             buildInfo.fancyVersionString = QString{"v%1 (dist-<a href=\"https://github.com/quassel/quassel/commit/%3\">%2</a>)"}
 320                                                .arg(buildInfo.baseVersion)
 321                                                .arg(buildInfo.commitHash.left(7))
 322                                                .arg(buildInfo.commitHash);
 323         }
 324         else {
 325             // we only have a base version :(
 326             buildInfo.plainVersionString = QString{"v%1 (unknown revision)"}.arg(buildInfo.baseVersion);
 327         }
 328     }
 329     else {
 330         // analyze what we got from git-describe
 331         static const QRegExp rx{"(.*)-(\\d+)-g([0-9a-f]+)(-dirty)?$"};
 332         if (rx.exactMatch(buildInfo.generatedVersion)) {
 333             QString distance = rx.cap(2) == "0" ? QString{} : QString{"%1+%2 "}.arg(rx.cap(1), rx.cap(2));
 334             buildInfo.plainVersionString = QString{"v%1 (%2git-%3%4)"}.arg(buildInfo.baseVersion, distance, rx.cap(3), rx.cap(4));
 335             if (!buildInfo.commitHash.isEmpty()) {
 336                 buildInfo.fancyVersionString = QString{"v%1 (%2git-<a href=\"https://github.com/quassel/quassel/commit/%5\">%3</a>%4)"}
 337                                                    .arg(buildInfo.baseVersion, distance, rx.cap(3), rx.cap(4), buildInfo.commitHash);
 338             }
 339         }
 340         else {
 341             buildInfo.plainVersionString = QString{"v%1 (invalid revision)"}.arg(buildInfo.baseVersion);
 342         }
 343     }
 344     if (buildInfo.fancyVersionString.isEmpty()) {
 345         buildInfo.fancyVersionString = buildInfo.plainVersionString;
 346     }
 347
 348     instance()->_buildInfo = std::move(buildInfo);
 349 }
 350
 351
 352 const Quassel::BuildInfo &Quassel::buildInfo()
 353 {
 354     return instance()->_buildInfo;
 355 }
 356
 357
 358 //! Signal handler for graceful shutdown.
 359 void Quassel::handleSignal(int sig)
 360 {
 361     switch (sig) {
 362     case SIGTERM:
 363     case SIGINT:
 364         qWarning("%s", qPrintable(QString("Caught signal %1 - exiting.").arg(sig)));
 365         instance()->quit();
 366         break;
 367 #ifndef Q_OS_WIN
 368 // Windows does not support SIGHUP
 369     case SIGHUP:
 370         // Most applications use this as the 'configuration reload' command, e.g. nginx uses it for
 371         // graceful reloading of processes.
 372         quInfo() << "Caught signal" << SIGHUP << "- reloading configuration";
 373         if (instance()->reloadConfig()) {
 374             quInfo() << "Successfully reloaded configuration";
 375         }
 376         break;
 377 #endif
 378     case SIGABRT:
 379     case SIGSEGV:
 380 #ifndef Q_OS_WIN
 381     case SIGBUS:
 382 #endif
 383         instance()->logBacktrace(instance()->coreDumpFileName());
 384         exit(EXIT_FAILURE);
 385     default:
 386         ;
 387     }
 388 }
 389
 390
 391 void Quassel::disableCrashHandler()
 392 {
 393     instance()->_handleCrashes = false;
 394 }
 395
 396
 397 Quassel::RunMode Quassel::runMode() {
 398     return instance()->_runMode;
 399 }
 400
 401
 402 void Quassel::setRunMode(RunMode runMode)
 403 {
 404     instance()->_runMode = runMode;
 405 }
 406
 407
 408 void Quassel::setCliParser(std::shared_ptr<AbstractCliParser> parser)
 409 {
 410     instance()->_cliParser = std::move(parser);
 411 }
 412
 413
 414 QString Quassel::optionValue(const QString &key)
 415 {
 416     return instance()->_cliParser ? instance()->_cliParser->value(key) : QString{};
 417 }
 418
 419
 420 bool Quassel::isOptionSet(const QString &key)
 421 {
 422     return instance()->_cliParser ? instance()->_cliParser->isSet(key) : false;
 423 }
 424
 425
 426 Quassel::LogLevel Quassel::logLevel()
 427 {
 428     return instance()->_logLevel;
 429 }
 430
 431
 432 void Quassel::setLogLevel(LogLevel logLevel)
 433 {
 434     instance()->_logLevel = logLevel;
 435 }
 436
 437
 438 QFile *Quassel::logFile() {
 439     return instance()->_logFile.get();
 440 }
 441
 442
 443 bool Quassel::logToSyslog()
 444 {
 445     return instance()->_logToSyslog;
 446 }
 447
 448
 449 void Quassel::logFatalMessage(const char *msg)
 450 {
 451 #ifdef Q_OS_MAC
 452     Q_UNUSED(msg)
 453 #else
 454     QFile dumpFile(instance()->coreDumpFileName());
 455     dumpFile.open(QIODevice::Append);
 456     QTextStream dumpStream(&dumpFile);
 457
 458     dumpStream << "Fatal: " << msg << '\n';
 459     dumpStream.flush();
 460     dumpFile.close();
 461 #endif
 462 }
 463
 464
 465 const QString &Quassel::coreDumpFileName()
 466 {
 467     if (_coreDumpFileName.isEmpty()) {
 468         QDir configDir(configDirPath());
 469         _coreDumpFileName = configDir.absoluteFilePath(QString("Quassel-Crash-%1.log").arg(QDateTime::currentDateTime().toString("yyyyMMdd-hhmm")));
 470         QFile dumpFile(_coreDumpFileName);
 471         dumpFile.open(QIODevice::Append);
 472         QTextStream dumpStream(&dumpFile);
 473         dumpStream << "Quassel IRC: " << _buildInfo.baseVersion << ' ' << _buildInfo.commitHash << '\n';
 474         qDebug() << "Quassel IRC: " << _buildInfo.baseVersion << ' ' << _buildInfo.commitHash;
 475         dumpStream.flush();
 476         dumpFile.close();
 477     }
 478     return _coreDumpFileName;
 479 }
 480
 481
 482 QString Quassel::configDirPath()
 483 {
 484     if (!instance()->_configDirPath.isEmpty())
 485         return instance()->_configDirPath;
 486
 487     QString path;
 488     if (isOptionSet("datadir")) {
 489         qWarning() << "Obsolete option --datadir used!";
 490         path = Quassel::optionValue("datadir");
 491     }
 492     else if (isOptionSet("configdir")) {
 493         path = Quassel::optionValue("configdir");
 494     }
 495     else {
 496 #ifdef Q_OS_MAC
 497         // On Mac, the path is always the same
 498         path = QDir::homePath() + "/Library/Application Support/Quassel/";
 499 #else
 500         // We abuse QSettings to find us a sensible path on the other platforms
 501 #  ifdef Q_OS_WIN
 502         // don't use the registry
 503         QSettings::Format format = QSettings::IniFormat;
 504 #  else
 505         QSettings::Format format = QSettings::NativeFormat;
 506 #  endif
 507         QSettings s(format, QSettings::UserScope, QCoreApplication::organizationDomain(), buildInfo().applicationName);
 508         QFileInfo fileInfo(s.fileName());
 509         path = fileInfo.dir().absolutePath();
 510 #endif /* Q_OS_MAC */
 511     }
 512
 513     path = QFileInfo{path}.absoluteFilePath();
 514
 515     if (!path.endsWith(QDir::separator()) && !path.endsWith('/'))
 516         path += QDir::separator();
 517
 518     QDir qDir{path};
 519     if (!qDir.exists(path)) {
 520         if (!qDir.mkpath(path)) {
 521             qCritical() << "Unable to create Quassel config directory:" << qPrintable(qDir.absolutePath());
 522             return {};
 523         }
 524     }
 525
 526     instance()->_configDirPath = path;
 527     return path;
 528 }
 529
 530
 531 void Quassel::setDataDirPaths(const QStringList &paths) {
 532     instance()->_dataDirPaths = paths;
 533 }
 534
 535
 536 QStringList Quassel::dataDirPaths()
 537 {
 538     return instance()->_dataDirPaths;
 539 }
 540
 541
 542 QStringList Quassel::findDataDirPaths()
 543 {
 544     // TODO Qt5
 545     // We don't use QStandardPaths for now, as we still need to provide fallbacks for Qt4 and
 546     // want to stay consistent.
 547
 548     QStringList dataDirNames;
 549 #ifdef Q_OS_WIN
 550     dataDirNames << qgetenv("APPDATA") + QCoreApplication::organizationDomain() + "/share/apps/quassel/"
 551                  << qgetenv("APPDATA") + QCoreApplication::organizationDomain()
 552                  << QCoreApplication::applicationDirPath();
 553 #elif defined Q_OS_MAC
 554     dataDirNames << QDir::homePath() + "/Library/Application Support/Quassel/"
 555                  << QCoreApplication::applicationDirPath();
 556 #else
 557     // Linux et al
 558
 559     // XDG_DATA_HOME is the location for users to override system-installed files, usually in .local/share
 560     // This should thus come first.
 561     QString xdgDataHome = QFile::decodeName(qgetenv("XDG_DATA_HOME"));
 562     if (xdgDataHome.isEmpty())
 563         xdgDataHome = QDir::homePath() + QLatin1String("/.local/share");
 564     dataDirNames << xdgDataHome;
 565
 566     // Now whatever is configured through XDG_DATA_DIRS
 567     QString xdgDataDirs = QFile::decodeName(qgetenv("XDG_DATA_DIRS"));
 568     if (xdgDataDirs.isEmpty())
 569         dataDirNames << "/usr/local/share" << "/usr/share";
 570     else
 571         dataDirNames << xdgDataDirs.split(':', QString::SkipEmptyParts);
 572
 573     // Just in case, also check our install prefix
 574     dataDirNames << QCoreApplication::applicationDirPath() + "/../share";
 575
 576     // Normalize and append our application name
 577     for (int i = 0; i < dataDirNames.count(); i++)
 578         dataDirNames[i] = QDir::cleanPath(dataDirNames.at(i)) + "/quassel/";
 579
 580 #endif
 581
 582     // Add resource path and workdir just in case.
 583     // Workdir should have precedence
 584     dataDirNames.prepend(QCoreApplication::applicationDirPath() + "/data/");
 585     dataDirNames.append(":/data/");
 586
 587     // Append trailing '/' and check for existence
 588     auto iter = dataDirNames.begin();
 589     while (iter != dataDirNames.end()) {
 590         if (!iter->endsWith(QDir::separator()) && !iter->endsWith('/'))
 591             iter->append(QDir::separator());
 592         if (!QFile::exists(*iter))
 593             iter = dataDirNames.erase(iter);
 594         else
 595             ++iter;
 596     }
 597
 598     dataDirNames.removeDuplicates();
 599
 600     return dataDirNames;
 601 }
 602
 603
 604 QString Quassel::findDataFilePath(const QString &fileName)
 605 {
 606     QStringList dataDirs = dataDirPaths();
 607     foreach(QString dataDir, dataDirs) {
 608         QString path = dataDir + fileName;
 609         if (QFile::exists(path))
 610             return path;
 611     }
 612     return QString();
 613 }
 614
 615
 616 QStringList Quassel::scriptDirPaths()
 617 {
 618     QStringList res(configDirPath() + "scripts/");
 619     foreach(QString path, dataDirPaths())
 620     res << path + "scripts/";
 621     return res;
 622 }
 623
 624
 625 QString Quassel::translationDirPath()
 626 {
 627     if (instance()->_translationDirPath.isEmpty()) {
 628         // We support only one translation dir; fallback mechanisms wouldn't work else.
 629         // This means that if we have a $data/translations dir, the internal :/i18n resource won't be considered.
 630         foreach(const QString &dir, dataDirPaths()) {
 631             if (QFile::exists(dir + "translations/")) {
 632                 instance()->_translationDirPath = dir + "translations/";
 633                 break;
 634             }
 635         }
 636         if (instance()->_translationDirPath.isEmpty())
 637             instance()->_translationDirPath = ":/i18n/";
 638     }
 639     return instance()->_translationDirPath;
 640 }
 641
 642
 643 void Quassel::loadTranslation(const QLocale &locale)
 644 {
 645     QTranslator *qtTranslator = QCoreApplication::instance()->findChild<QTranslator *>("QtTr");
 646     QTranslator *quasselTranslator = QCoreApplication::instance()->findChild<QTranslator *>("QuasselTr");
 647
 648     if (qtTranslator)
 649         qApp->removeTranslator(qtTranslator);
 650     if (quasselTranslator)
 651         qApp->removeTranslator(quasselTranslator);
 652
 653     // We use QLocale::C to indicate that we don't want a translation
 654     if (locale.language() == QLocale::C)
 655         return;
 656
 657     qtTranslator = new QTranslator(qApp);
 658     qtTranslator->setObjectName("QtTr");
 659     qApp->installTranslator(qtTranslator);
 660
 661     quasselTranslator = new QTranslator(qApp);
 662     quasselTranslator->setObjectName("QuasselTr");
 663     qApp->installTranslator(quasselTranslator);
 664
 665 #if QT_VERSION >= 0x040800 && !defined Q_OS_MAC
 666     bool success = qtTranslator->load(locale, QString("qt_"), translationDirPath());
 667     if (!success)
 668         qtTranslator->load(locale, QString("qt_"), QLibraryInfo::location(QLibraryInfo::TranslationsPath));
 669     quasselTranslator->load(locale, QString(""), translationDirPath());
 670 #else
 671     bool success = qtTranslator->load(QString("qt_%1").arg(locale.name()), translationDirPath());
 672     if (!success)
 673         qtTranslator->load(QString("qt_%1").arg(locale.name()), QLibraryInfo::location(QLibraryInfo::TranslationsPath));
 674     quasselTranslator->load(QString("%1").arg(locale.name()), translationDirPath());
 675 #endif
 676 }
 677
 678
 679 // ---- Quassel::Features ---------------------------------------------------------------------------------------------
 680
 681 Quassel::Features::Features()
 682 {
 683     QStringList features;
 684
 685     // TODO Qt5: Use QMetaEnum::fromType()
 686     auto featureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("Feature"));
 687     _features.resize(featureEnum.keyCount(), true);  // enable all known features to true
 688 }
 689
 690
 691 Quassel::Features::Features(const QStringList &features, LegacyFeatures legacyFeatures)
 692 {
 693     // TODO Qt5: Use QMetaEnum::fromType()
 694     auto featureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("Feature"));
 695     _features.resize(featureEnum.keyCount(), false);
 696
 697     for (auto &&feature : features) {
 698         int i = featureEnum.keyToValue(qPrintable(feature));
 699         if (i >= 0) {
 700             _features[i] = true;
 701         }
 702         else {
 703             _unknownFeatures << feature;
 704         }
 705     }
 706
 707     if (legacyFeatures) {
 708         // TODO Qt5: Use QMetaEnum::fromType()
 709         auto legacyFeatureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("LegacyFeature"));
 710         for (quint32 mask = 0x0001; mask <= 0x8000; mask <<=1) {
 711             if (static_cast<quint32>(legacyFeatures) & mask) {
 712                 int i = featureEnum.keyToValue(legacyFeatureEnum.valueToKey(mask));
 713                 if (i >= 0) {
 714                     _features[i] = true;
 715                 }
 716             }
 717         }
 718     }
 719 }
 720
 721
 722 bool Quassel::Features::isEnabled(Feature feature) const
 723 {
 724     size_t i = static_cast<size_t>(feature);
 725     return i < _features.size() ? _features[i] : false;
 726 }
 727
 728
 729 QStringList Quassel::Features::toStringList(bool enabled) const
 730 {
 731     // Check if any feature is enabled
 732     if (!enabled && std::all_of(_features.cbegin(), _features.cend(), [](bool feature) { return !feature; })) {
 733         return QStringList{} << "NoFeatures";
 734     }
 735
 736     QStringList result;
 737
 738     // TODO Qt5: Use QMetaEnum::fromType()
 739     auto featureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("Feature"));
 740     for (quint32 i = 0; i < _features.size(); ++i) {
 741         if (_features[i] == enabled) {
 742             result << featureEnum.key(i);
 743         }
 744     }
 745     return result;
 746 }
 747
 748
 749 Quassel::LegacyFeatures Quassel::Features::toLegacyFeatures() const
 750 {
 751     // TODO Qt5: Use LegacyFeatures (flag operators for enum classes not supported in Qt4)
 752     quint32 result{0};
 753     // TODO Qt5: Use QMetaEnum::fromType()
 754     auto featureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("Feature"));
 755     auto legacyFeatureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("LegacyFeature"));
 756
 757     for (quint32 i = 0; i < _features.size(); ++i) {
 758         if (_features[i]) {
 759             int v = legacyFeatureEnum.keyToValue(featureEnum.key(i));
 760             if (v >= 0) {
 761                 result |= v;
 762             }
 763         }
 764     }
 765     return static_cast<LegacyFeatures>(result);
 766 }
 767
 768
 769 QStringList Quassel::Features::unknownFeatures() const
 770 {
 771     return _unknownFeatures;
 772 }