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