src/common/quassel.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2005-2016 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 <iostream>
  24 #include <signal.h>
  25 #if !defined Q_OS_WIN && !defined Q_OS_MAC
  26 #  include <sys/types.h>
  27 #  include <sys/time.h>
  28 #  include <sys/resource.h>
  29 #endif
  30
  31 #include <QCoreApplication>
  32 #include <QDateTime>
  33 #include <QDir>
  34 #include <QFileInfo>
  35 #include <QHostAddress>
  36 #include <QLibraryInfo>
  37 #include <QMetaEnum>
  38 #include <QSettings>
  39 #include <QTranslator>
  40 #include <QUuid>
  41
  42 #include "bufferinfo.h"
  43 #include "identity.h"
  44 #include "logger.h"
  45 #include "message.h"
  46 #include "network.h"
  47 #include "peer.h"
  48 #include "protocol.h"
  49 #include "syncableobject.h"
  50 #include "types.h"
  51
  52 #include "../../version.h"
  53
  54 Quassel *Quassel::instance()
  55 {
  56     static Quassel instance;
  57     return &instance;
  58 }
  59
  60
  61 Quassel::Quassel()
  62 {
  63     // We catch SIGTERM and SIGINT (caused by Ctrl+C) to graceful shutdown Quassel.
  64     signal(SIGTERM, handleSignal);
  65     signal(SIGINT, handleSignal);
  66 #ifndef Q_OS_WIN
  67     // SIGHUP is used to reload configuration (i.e. SSL certificates)
  68     // Windows does not support SIGHUP
  69     signal(SIGHUP, handleSignal);
  70 #endif
  71 }
  72
  73
  74 bool Quassel::init()
  75 {
  76     if (instance()->_initialized)
  77         return true;  // allow multiple invocations because of MonolithicApplication
  78
  79     if (instance()->_handleCrashes) {
  80         // we have crashhandler for win32 and unix (based on execinfo).
  81 #if defined(Q_OS_WIN) || defined(HAVE_EXECINFO)
  82 # ifndef Q_OS_WIN
  83         // we only handle crashes ourselves if coredumps are disabled
  84         struct rlimit *limit = (rlimit *)malloc(sizeof(struct rlimit));
  85         int rc = getrlimit(RLIMIT_CORE, limit);
  86
  87         if (rc == -1 || !((long)limit->rlim_cur > 0 || limit->rlim_cur == RLIM_INFINITY)) {
  88 # endif /* Q_OS_WIN */
  89         signal(SIGABRT, handleSignal);
  90         signal(SIGSEGV, handleSignal);
  91 # ifndef Q_OS_WIN
  92         signal(SIGBUS, handleSignal);
  93     }
  94     free(limit);
  95 # endif /* Q_OS_WIN */
  96 #endif /* Q_OS_WIN || HAVE_EXECINFO */
  97     }
  98
  99     instance()->_initialized = true;
 100     qsrand(QTime(0, 0, 0).secsTo(QTime::currentTime()));
 101
 102     instance()->setupEnvironment();
 103     instance()->registerMetaTypes();
 104
 105     Network::setDefaultCodecForServer("ISO-8859-1");
 106     Network::setDefaultCodecForEncoding("UTF-8");
 107     Network::setDefaultCodecForDecoding("ISO-8859-15");
 108
 109     if (isOptionSet("help")) {
 110         instance()->_cliParser->usage();
 111         return false;
 112     }
 113
 114     if (isOptionSet("version")) {
 115         std::cout << qPrintable("Quassel IRC: " + Quassel::buildInfo().plainVersionString) << std::endl;
 116         return false;
 117     }
 118
 119     // set up logging
 120     if (Quassel::runMode() != Quassel::ClientOnly) {
 121         if (isOptionSet("loglevel")) {
 122             QString level = optionValue("loglevel");
 123
 124             if (level == "Debug")
 125                 setLogLevel(DebugLevel);
 126             else if (level == "Info")
 127                 setLogLevel(InfoLevel);
 128             else if (level == "Warning")
 129                 setLogLevel(WarningLevel);
 130             else if (level == "Error")
 131                 setLogLevel(ErrorLevel);
 132             else {
 133                 qWarning() << qPrintable(tr("Invalid log level %1; supported are Debug|Info|Warning|Error").arg(level));
 134                 return false;
 135             }
 136         }
 137
 138         QString logfilename = optionValue("logfile");
 139         if (!logfilename.isEmpty()) {
 140             instance()->_logFile.reset(new QFile{logfilename});
 141             if (!logFile()->open(QIODevice::Append | QIODevice::Text)) {
 142                 qWarning() << "Could not open log file" << logfilename << ":" << logFile()->errorString();
 143                 instance()->_logFile.reset();
 144             }
 145         }
 146 #ifdef HAVE_SYSLOG
 147         instance()->_logToSyslog = isOptionSet("syslog");
 148 #endif
 149     }
 150
 151     return true;
 152 }
 153
 154
 155 void Quassel::destroy()
 156 {
 157     if (logFile()) {
 158         logFile()->close();
 159         instance()->_logFile.reset();
 160     }
 161 }
 162
 163
 164 void Quassel::registerQuitHandler(QuitHandler handler)
 165 {
 166     instance()->_quitHandlers.emplace_back(std::move(handler));
 167 }
 168
 169 void Quassel::quit()
 170 {
 171     if (_quitHandlers.empty()) {
 172         QCoreApplication::quit();
 173     }
 174     else {
 175         for (auto &&handler : _quitHandlers) {
 176             handler();
 177         }
 178     }
 179 }
 180
 181
 182 void Quassel::registerReloadHandler(ReloadHandler handler)
 183 {
 184     instance()->_reloadHandlers.emplace_back(std::move(handler));
 185 }
 186
 187
 188 bool Quassel::reloadConfig()
 189 {
 190     bool result{true};
 191     for (auto &&handler : _reloadHandlers) {
 192         result = result && handler();
 193     }
 194     return result;
 195 }
 196
 197
 198 //! Register our custom types with Qt's Meta Object System.
 199 /**  This makes them available for QVariant and in signals/slots, among other things.
 200 *
 201 */
 202 void Quassel::registerMetaTypes()
 203 {
 204     // Complex types
 205     qRegisterMetaType<Message>("Message");
 206     qRegisterMetaType<BufferInfo>("BufferInfo");
 207     qRegisterMetaType<NetworkInfo>("NetworkInfo");
 208     qRegisterMetaType<Network::Server>("Network::Server");
 209     qRegisterMetaType<Identity>("Identity");
 210
 211     qRegisterMetaTypeStreamOperators<Message>("Message");
 212     qRegisterMetaTypeStreamOperators<BufferInfo>("BufferInfo");
 213     qRegisterMetaTypeStreamOperators<NetworkInfo>("NetworkInfo");
 214     qRegisterMetaTypeStreamOperators<Network::Server>("Network::Server");
 215     qRegisterMetaTypeStreamOperators<Identity>("Identity");
 216
 217     qRegisterMetaType<IdentityId>("IdentityId");
 218     qRegisterMetaType<BufferId>("BufferId");
 219     qRegisterMetaType<NetworkId>("NetworkId");
 220     qRegisterMetaType<UserId>("UserId");
 221     qRegisterMetaType<AccountId>("AccountId");
 222     qRegisterMetaType<MsgId>("MsgId");
 223
 224     qRegisterMetaType<QHostAddress>("QHostAddress");
 225     qRegisterMetaTypeStreamOperators<QHostAddress>("QHostAddress");
 226     qRegisterMetaType<QUuid>("QUuid");
 227     qRegisterMetaTypeStreamOperators<QUuid>("QUuid");
 228
 229     qRegisterMetaTypeStreamOperators<IdentityId>("IdentityId");
 230     qRegisterMetaTypeStreamOperators<BufferId>("BufferId");
 231     qRegisterMetaTypeStreamOperators<NetworkId>("NetworkId");
 232     qRegisterMetaTypeStreamOperators<UserId>("UserId");
 233     qRegisterMetaTypeStreamOperators<AccountId>("AccountId");
 234     qRegisterMetaTypeStreamOperators<MsgId>("MsgId");
 235
 236     qRegisterMetaType<Protocol::SessionState>("Protocol::SessionState");
 237     qRegisterMetaType<PeerPtr>("PeerPtr");
 238     qRegisterMetaTypeStreamOperators<PeerPtr>("PeerPtr");
 239
 240     // Versions of Qt prior to 4.7 didn't define QVariant as a meta type
 241     if (!QMetaType::type("QVariant")) {
 242         qRegisterMetaType<QVariant>("QVariant");
 243         qRegisterMetaTypeStreamOperators<QVariant>("QVariant");
 244     }
 245 }
 246
 247
 248 void Quassel::setupEnvironment()
 249 {
 250     // On modern Linux systems, XDG_DATA_DIRS contains a list of directories containing application data. This
 251     // is, for example, used by Qt for finding icons and other things. In case Quassel is installed in a non-standard
 252     // prefix (or run from the build directory), it makes sense to add this to XDG_DATA_DIRS so we don't have to
 253     // hack extra search paths into various places.
 254 #ifdef Q_OS_UNIX
 255     QString xdgDataVar = QFile::decodeName(qgetenv("XDG_DATA_DIRS"));
 256     if (xdgDataVar.isEmpty())
 257         xdgDataVar = QLatin1String("/usr/local/share:/usr/share"); // sane defaults
 258
 259     QStringList xdgDirs = xdgDataVar.split(QLatin1Char(':'), QString::SkipEmptyParts);
 260
 261     // Add our install prefix (if we're not in a bindir, this just adds the current workdir)
 262     QString appDir = QCoreApplication::applicationDirPath();
 263     int binpos = appDir.lastIndexOf("/bin");
 264     if (binpos >= 0) {
 265         appDir.replace(binpos, 4, "/share");
 266         xdgDirs.append(appDir);
 267         // Also append apps/quassel, this is only for QIconLoader to find icons there
 268         xdgDirs.append(appDir + "/apps/quassel");
 269     } else
 270         xdgDirs.append(appDir);  // build directory is always the last fallback
 271
 272     xdgDirs.removeDuplicates();
 273
 274     qputenv("XDG_DATA_DIRS", QFile::encodeName(xdgDirs.join(":")));
 275 #endif
 276 }
 277
 278
 279 void Quassel::setupBuildInfo()
 280 {
 281     BuildInfo buildInfo;
 282     buildInfo.applicationName = "quassel";
 283     buildInfo.coreApplicationName = "quasselcore";
 284     buildInfo.clientApplicationName = "quasselclient";
 285     buildInfo.organizationName = "Quassel Project";
 286     buildInfo.organizationDomain = "quassel-irc.org";
 287
 288     buildInfo.protocolVersion = 10; // FIXME: deprecated, will be removed
 289
 290     buildInfo.baseVersion = QUASSEL_VERSION_STRING;
 291     buildInfo.generatedVersion = GIT_DESCRIBE;
 292
 293     // Check if we got a commit hash
 294     if (!QString(GIT_HEAD).isEmpty()) {
 295         buildInfo.commitHash = GIT_HEAD;
 296         QDateTime date;
 297         date.setTime_t(GIT_COMMIT_DATE);
 298         buildInfo.commitDate = date.toString();
 299     }
 300     else if (!QString(DIST_HASH).contains("Format")) {
 301         buildInfo.commitHash = DIST_HASH;
 302         buildInfo.commitDate = QString(DIST_DATE);
 303     }
 304
 305     // create a nice version string
 306     if (buildInfo.generatedVersion.isEmpty()) {
 307         if (!buildInfo.commitHash.isEmpty()) {
 308             // dist version
 309             buildInfo.plainVersionString = QString{"v%1 (dist-%2)"}
 310                                                .arg(buildInfo.baseVersion)
 311                                                .arg(buildInfo.commitHash.left(7));
 312             buildInfo.fancyVersionString = QString{"v%1 (dist-<a href=\"https://github.com/quassel/quassel/commit/%3\">%2</a>)"}
 313                                                .arg(buildInfo.baseVersion)
 314                                                .arg(buildInfo.commitHash.left(7))
 315                                                .arg(buildInfo.commitHash);
 316         }
 317         else {
 318             // we only have a base version :(
 319             buildInfo.plainVersionString = QString{"v%1 (unknown revision)"}.arg(buildInfo.baseVersion);
 320         }
 321     }
 322     else {
 323         // analyze what we got from git-describe
 324         static const QRegExp rx{"(.*)-(\\d+)-g([0-9a-f]+)(-dirty)?$"};
 325         if (rx.exactMatch(buildInfo.generatedVersion)) {
 326             QString distance = rx.cap(2) == "0" ? QString{} : QString{"%1+%2 "}.arg(rx.cap(1), rx.cap(2));
 327             buildInfo.plainVersionString = QString{"v%1 (%2git-%3%4)"}.arg(buildInfo.baseVersion, distance, rx.cap(3), rx.cap(4));
 328             if (!buildInfo.commitHash.isEmpty()) {
 329                 buildInfo.fancyVersionString = QString{"v%1 (%2git-<a href=\"https://github.com/quassel/quassel/commit/%5\">%3</a>%4)"}
 330                                                    .arg(buildInfo.baseVersion, distance, rx.cap(3), rx.cap(4), buildInfo.commitHash);
 331             }
 332         }
 333         else {
 334             buildInfo.plainVersionString = QString{"v%1 (invalid revision)"}.arg(buildInfo.baseVersion);
 335         }
 336     }
 337     if (buildInfo.fancyVersionString.isEmpty()) {
 338         buildInfo.fancyVersionString = buildInfo.plainVersionString;
 339     }
 340
 341     instance()->_buildInfo = std::move(buildInfo);
 342 }
 343
 344
 345 const Quassel::BuildInfo &Quassel::buildInfo()
 346 {
 347     return instance()->_buildInfo;
 348 }
 349
 350
 351 //! Signal handler for graceful shutdown.
 352 void Quassel::handleSignal(int sig)
 353 {
 354     switch (sig) {
 355     case SIGTERM:
 356     case SIGINT:
 357         qWarning("%s", qPrintable(QString("Caught signal %1 - exiting.").arg(sig)));
 358         instance()->quit();
 359         break;
 360 #ifndef Q_OS_WIN
 361 // Windows does not support SIGHUP
 362     case SIGHUP:
 363         // Most applications use this as the 'configuration reload' command, e.g. nginx uses it for
 364         // graceful reloading of processes.
 365         quInfo() << "Caught signal" << SIGHUP << "- reloading configuration";
 366         if (instance()->reloadConfig()) {
 367             quInfo() << "Successfully reloaded configuration";
 368         }
 369         break;
 370 #endif
 371     case SIGABRT:
 372     case SIGSEGV:
 373 #ifndef Q_OS_WIN
 374     case SIGBUS:
 375 #endif
 376         instance()->logBacktrace(instance()->coreDumpFileName());
 377         exit(EXIT_FAILURE);
 378     default:
 379         ;
 380     }
 381 }
 382
 383
 384 void Quassel::disableCrashHandler()
 385 {
 386     instance()->_handleCrashes = false;
 387 }
 388
 389
 390 Quassel::RunMode Quassel::runMode() {
 391     return instance()->_runMode;
 392 }
 393
 394
 395 void Quassel::setRunMode(RunMode runMode)
 396 {
 397     instance()->_runMode = runMode;
 398 }
 399
 400
 401 void Quassel::setCliParser(std::shared_ptr<AbstractCliParser> parser)
 402 {
 403     instance()->_cliParser = std::move(parser);
 404 }
 405
 406
 407 QString Quassel::optionValue(const QString &key)
 408 {
 409     return instance()->_cliParser ? instance()->_cliParser->value(key) : QString{};
 410 }
 411
 412
 413 bool Quassel::isOptionSet(const QString &key)
 414 {
 415     return instance()->_cliParser ? instance()->_cliParser->isSet(key) : false;
 416 }
 417
 418
 419 Quassel::LogLevel Quassel::logLevel()
 420 {
 421     return instance()->_logLevel;
 422 }
 423
 424
 425 void Quassel::setLogLevel(LogLevel logLevel)
 426 {
 427     instance()->_logLevel = logLevel;
 428 }
 429
 430
 431 QFile *Quassel::logFile() {
 432     return instance()->_logFile.get();
 433 }
 434
 435
 436 bool Quassel::logToSyslog()
 437 {
 438     return instance()->_logToSyslog;
 439 }
 440
 441
 442 void Quassel::logFatalMessage(const char *msg)
 443 {
 444 #ifdef Q_OS_MAC
 445     Q_UNUSED(msg)
 446 #else
 447     QFile dumpFile(instance()->coreDumpFileName());
 448     dumpFile.open(QIODevice::Append);
 449     QTextStream dumpStream(&dumpFile);
 450
 451     dumpStream << "Fatal: " << msg << '\n';
 452     dumpStream.flush();
 453     dumpFile.close();
 454 #endif
 455 }
 456
 457
 458 const QString &Quassel::coreDumpFileName()
 459 {
 460     if (_coreDumpFileName.isEmpty()) {
 461         QDir configDir(configDirPath());
 462         _coreDumpFileName = configDir.absoluteFilePath(QString("Quassel-Crash-%1.log").arg(QDateTime::currentDateTime().toString("yyyyMMdd-hhmm")));
 463         QFile dumpFile(_coreDumpFileName);
 464         dumpFile.open(QIODevice::Append);
 465         QTextStream dumpStream(&dumpFile);
 466         dumpStream << "Quassel IRC: " << _buildInfo.baseVersion << ' ' << _buildInfo.commitHash << '\n';
 467         qDebug() << "Quassel IRC: " << _buildInfo.baseVersion << ' ' << _buildInfo.commitHash;
 468         dumpStream.flush();
 469         dumpFile.close();
 470     }
 471     return _coreDumpFileName;
 472 }
 473
 474
 475 QString Quassel::configDirPath()
 476 {
 477     if (!instance()->_configDirPath.isEmpty())
 478         return instance()->_configDirPath;
 479
 480     QString path;
 481     if (isOptionSet("datadir")) {
 482         qWarning() << "Obsolete option --datadir used!";
 483         path = Quassel::optionValue("datadir");
 484     }
 485     else if (isOptionSet("configdir")) {
 486         path = Quassel::optionValue("configdir");
 487     }
 488     else {
 489 #ifdef Q_OS_MAC
 490         // On Mac, the path is always the same
 491         path = QDir::homePath() + "/Library/Application Support/Quassel/";
 492 #else
 493         // We abuse QSettings to find us a sensible path on the other platforms
 494 #  ifdef Q_OS_WIN
 495         // don't use the registry
 496         QSettings::Format format = QSettings::IniFormat;
 497 #  else
 498         QSettings::Format format = QSettings::NativeFormat;
 499 #  endif
 500         QSettings s(format, QSettings::UserScope, QCoreApplication::organizationDomain(), buildInfo().applicationName);
 501         QFileInfo fileInfo(s.fileName());
 502         path = fileInfo.dir().absolutePath();
 503 #endif /* Q_OS_MAC */
 504     }
 505
 506     if (!path.endsWith(QDir::separator()) && !path.endsWith('/'))
 507         path += QDir::separator();
 508
 509     QDir qDir{path};
 510     if (!qDir.exists(path)) {
 511         if (!qDir.mkpath(path)) {
 512             qCritical() << "Unable to create Quassel config directory:" << qPrintable(qDir.absolutePath());
 513             return {};
 514         }
 515     }
 516
 517     instance()->_configDirPath = path;
 518
 519     return path;
 520 }
 521
 522
 523 void Quassel::setDataDirPaths(const QStringList &paths) {
 524     instance()->_dataDirPaths = paths;
 525 }
 526
 527
 528 QStringList Quassel::dataDirPaths()
 529 {
 530     return instance()->_dataDirPaths;
 531 }
 532
 533
 534 QStringList Quassel::findDataDirPaths()
 535 {
 536     // TODO Qt5
 537     // We don't use QStandardPaths for now, as we still need to provide fallbacks for Qt4 and
 538     // want to stay consistent.
 539
 540     QStringList dataDirNames;
 541 #ifdef Q_OS_WIN
 542     dataDirNames << qgetenv("APPDATA") + QCoreApplication::organizationDomain() + "/share/apps/quassel/"
 543                  << qgetenv("APPDATA") + QCoreApplication::organizationDomain()
 544                  << QCoreApplication::applicationDirPath();
 545 #elif defined Q_OS_MAC
 546     dataDirNames << QDir::homePath() + "/Library/Application Support/Quassel/"
 547                  << QCoreApplication::applicationDirPath();
 548 #else
 549     // Linux et al
 550
 551     // XDG_DATA_HOME is the location for users to override system-installed files, usually in .local/share
 552     // This should thus come first.
 553     QString xdgDataHome = QFile::decodeName(qgetenv("XDG_DATA_HOME"));
 554     if (xdgDataHome.isEmpty())
 555         xdgDataHome = QDir::homePath() + QLatin1String("/.local/share");
 556     dataDirNames << xdgDataHome;
 557
 558     // Now whatever is configured through XDG_DATA_DIRS
 559     QString xdgDataDirs = QFile::decodeName(qgetenv("XDG_DATA_DIRS"));
 560     if (xdgDataDirs.isEmpty())
 561         dataDirNames << "/usr/local/share" << "/usr/share";
 562     else
 563         dataDirNames << xdgDataDirs.split(':', QString::SkipEmptyParts);
 564
 565     // Just in case, also check our install prefix
 566     dataDirNames << QCoreApplication::applicationDirPath() + "/../share";
 567
 568     // Normalize and append our application name
 569     for (int i = 0; i < dataDirNames.count(); i++)
 570         dataDirNames[i] = QDir::cleanPath(dataDirNames.at(i)) + "/quassel/";
 571
 572 #endif
 573
 574     // Add resource path and workdir just in case.
 575     // Workdir should have precedence
 576     dataDirNames.prepend(QCoreApplication::applicationDirPath() + "/data/");
 577     dataDirNames.append(":/data/");
 578
 579     // Append trailing '/' and check for existence
 580     auto iter = dataDirNames.begin();
 581     while (iter != dataDirNames.end()) {
 582         if (!iter->endsWith(QDir::separator()) && !iter->endsWith('/'))
 583             iter->append(QDir::separator());
 584         if (!QFile::exists(*iter))
 585             iter = dataDirNames.erase(iter);
 586         else
 587             ++iter;
 588     }
 589
 590     dataDirNames.removeDuplicates();
 591
 592     return dataDirNames;
 593 }
 594
 595
 596 QString Quassel::findDataFilePath(const QString &fileName)
 597 {
 598     QStringList dataDirs = dataDirPaths();
 599     foreach(QString dataDir, dataDirs) {
 600         QString path = dataDir + fileName;
 601         if (QFile::exists(path))
 602             return path;
 603     }
 604     return QString();
 605 }
 606
 607
 608 QStringList Quassel::scriptDirPaths()
 609 {
 610     QStringList res(configDirPath() + "scripts/");
 611     foreach(QString path, dataDirPaths())
 612     res << path + "scripts/";
 613     return res;
 614 }
 615
 616
 617 QString Quassel::translationDirPath()
 618 {
 619     if (instance()->_translationDirPath.isEmpty()) {
 620         // We support only one translation dir; fallback mechanisms wouldn't work else.
 621         // This means that if we have a $data/translations dir, the internal :/i18n resource won't be considered.
 622         foreach(const QString &dir, dataDirPaths()) {
 623             if (QFile::exists(dir + "translations/")) {
 624                 instance()->_translationDirPath = dir + "translations/";
 625                 break;
 626             }
 627         }
 628         if (instance()->_translationDirPath.isEmpty())
 629             instance()->_translationDirPath = ":/i18n/";
 630     }
 631     return instance()->_translationDirPath;
 632 }
 633
 634
 635 void Quassel::loadTranslation(const QLocale &locale)
 636 {
 637     QTranslator *qtTranslator = QCoreApplication::instance()->findChild<QTranslator *>("QtTr");
 638     QTranslator *quasselTranslator = QCoreApplication::instance()->findChild<QTranslator *>("QuasselTr");
 639
 640     if (qtTranslator)
 641         qApp->removeTranslator(qtTranslator);
 642     if (quasselTranslator)
 643         qApp->removeTranslator(quasselTranslator);
 644
 645     // We use QLocale::C to indicate that we don't want a translation
 646     if (locale.language() == QLocale::C)
 647         return;
 648
 649     qtTranslator = new QTranslator(qApp);
 650     qtTranslator->setObjectName("QtTr");
 651     qApp->installTranslator(qtTranslator);
 652
 653     quasselTranslator = new QTranslator(qApp);
 654     quasselTranslator->setObjectName("QuasselTr");
 655     qApp->installTranslator(quasselTranslator);
 656
 657 #if QT_VERSION >= 0x040800 && !defined Q_OS_MAC
 658     bool success = qtTranslator->load(locale, QString("qt_"), translationDirPath());
 659     if (!success)
 660         qtTranslator->load(locale, QString("qt_"), QLibraryInfo::location(QLibraryInfo::TranslationsPath));
 661     quasselTranslator->load(locale, QString(""), translationDirPath());
 662 #else
 663     bool success = qtTranslator->load(QString("qt_%1").arg(locale.name()), translationDirPath());
 664     if (!success)
 665         qtTranslator->load(QString("qt_%1").arg(locale.name()), QLibraryInfo::location(QLibraryInfo::TranslationsPath));
 666     quasselTranslator->load(QString("%1").arg(locale.name()), translationDirPath());
 667 #endif
 668 }
 669
 670
 671 // ---- Quassel::Features ---------------------------------------------------------------------------------------------
 672
 673 Quassel::Features::Features()
 674 {
 675     QStringList features;
 676
 677     // TODO Qt5: Use QMetaEnum::fromType()
 678     auto featureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("Feature"));
 679     _features.resize(featureEnum.keyCount(), true);  // enable all known features to true
 680 }
 681
 682
 683 Quassel::Features::Features(const QStringList &features, LegacyFeatures legacyFeatures)
 684 {
 685     // TODO Qt5: Use QMetaEnum::fromType()
 686     auto featureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("Feature"));
 687     _features.resize(featureEnum.keyCount(), false);
 688
 689     for (auto &&feature : features) {
 690         int i = featureEnum.keyToValue(qPrintable(feature));
 691         if (i >= 0) {
 692             _features[i] = true;
 693         }
 694         else {
 695             _unknownFeatures << feature;
 696         }
 697     }
 698
 699     if (legacyFeatures) {
 700         // TODO Qt5: Use QMetaEnum::fromType()
 701         auto legacyFeatureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("LegacyFeature"));
 702         for (quint32 mask = 0x0001; mask <= 0x8000; mask <<=1) {
 703             if (static_cast<quint32>(legacyFeatures) & mask) {
 704                 int i = featureEnum.keyToValue(legacyFeatureEnum.valueToKey(mask));
 705                 if (i >= 0) {
 706                     _features[i] = true;
 707                 }
 708             }
 709         }
 710     }
 711 }
 712
 713
 714 bool Quassel::Features::isEnabled(Feature feature) const
 715 {
 716     size_t i = static_cast<size_t>(feature);
 717     return i < _features.size() ? _features[i] : false;
 718 }
 719
 720
 721 QStringList Quassel::Features::toStringList(bool enabled) const
 722 {
 723     QStringList result;
 724     // TODO Qt5: Use QMetaEnum::fromType()
 725     auto featureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("Feature"));
 726     for (quint32 i = 0; i < _features.size(); ++i) {
 727         if (_features[i] == enabled) {
 728             result << featureEnum.key(i);
 729         }
 730     }
 731     return result;
 732 }
 733
 734
 735 Quassel::LegacyFeatures Quassel::Features::toLegacyFeatures() const
 736 {
 737     // TODO Qt5: Use LegacyFeatures (flag operators for enum classes not supported in Qt4)
 738     quint32 result{0};
 739     // TODO Qt5: Use QMetaEnum::fromType()
 740     auto featureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("Feature"));
 741     auto legacyFeatureEnum = Quassel::staticMetaObject.enumerator(Quassel::staticMetaObject.indexOfEnumerator("LegacyFeature"));
 742
 743     for (quint32 i = 0; i < _features.size(); ++i) {
 744         if (_features[i]) {
 745             int v = legacyFeatureEnum.keyToValue(featureEnum.key(i));
 746             if (v >= 0) {
 747                 result |= v;
 748             }
 749         }
 750     }
 751     return static_cast<LegacyFeatures>(result);
 752 }
 753
 754
 755 QStringList Quassel::Features::unknownFeatures() const
 756 {
 757     return _unknownFeatures;
 758 }