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