Bump to 4.2.5

Qt 5.9.5 doesn't seem to recognize it, this patch fixes it.
Fix up: d8401c76f5.
Related: #12601.

.travis.yml

@@ -55,14 +55,13 @@ addons:
   apt:
     sources:
       # sources list: https://github.com/travis-ci/apt-source-safelist/blob/master/ubuntu.json
-      - sourceline: 'ppa:qbittorrent-team/qbittorrent-stable'
+      - sourceline: 'ppa:qbittorrent-team/qbt-libtorrent-travisci'
       - sourceline: 'ppa:beineri/opt-qt59-xenial'
     packages:
       # packages list: https://github.com/travis-ci/apt-package-safelist/blob/master/ubuntu-trusty
       - [autoconf, automake, colormake]
       - [libboost-dev, libboost-system-dev]
       - libssl-dev
-      - libtorrent-rasterbar-dev
       - [qt59base, qt59svg, qt59tools]
       - zlib1g-dev
       # required for Qt 5.9 from 'beineri' PPA
@@ -132,7 +131,7 @@ install:
       ccache -V && ccache --show-stats && ccache --zero-stats
     fi
   - |
-    if [ "$libt_branch" = "RC_1_2" ] && [ "$TRAVIS_OS_NAME" = "linux" ]; then
+    if [ "$libt_branch" = "RC_1_1" ] && [ "$TRAVIS_OS_NAME" = "linux" ]; then
       wget https://builds.shiki.hu/travis/deb/version
       if ! cmp --quiet "version" "$HOME/travis/deb/version" ; then
         echo "Cached files are different from server. Downloading new ones."
@@ -141,11 +140,16 @@ install:
         mkdir "$HOME/travis/deb"
         cp "version" $HOME/travis/deb
         cd "$HOME/travis/deb"
-        wget https://builds.shiki.hu/travis/deb/libtorrent-rasterbar-dev_1.2.x_amd64.deb
+        wget https://builds.shiki.hu/travis/deb/libtorrent-rasterbar-dev_1.1.x_amd64.deb
-        wget https://builds.shiki.hu/travis/deb/libtorrent-rasterbar10_1.2.x_amd64.deb
+        wget https://builds.shiki.hu/travis/deb/libtorrent-rasterbar9_1.1.x_amd64.deb
       fi
 
-      sudo dpkg -i "$HOME/travis/deb/libtorrent-rasterbar-dev_1.2.x_amd64.deb" "$HOME/travis/deb/libtorrent-rasterbar10_1.2.x_amd64.deb"
+      sudo dpkg -i "$HOME/travis/deb/libtorrent-rasterbar-dev_1.1.x_amd64.deb" "$HOME/travis/deb/libtorrent-rasterbar9_1.1.x_amd64.deb"
+    fi
+  - |
+    if [ "$libt_branch" = "RC_1_2" ] && [ "$TRAVIS_OS_NAME" = "linux" ]; then
+      # Will install latest 1.2.x daily build from the PPA
+      sudo apt-get -y install libtorrent-rasterbar-dev
     fi
   - |
     if [ "$libt_branch" = "RC_1_1" ] && [ "$TRAVIS_OS_NAME" = "osx" ]; then

Changelog

@@ -1,3 +1,30 @@
+Sat Apr 25 2020 - sledgehammer999 <sledgehammer999@qbittorrent.org> - v4.2.5
+    - BUGFIX: Fix crash when torrent is deleted on limit reached (glassez)
+    - BUGFIX: Register datatype properly (Chocobo1)
+    - WEBUI: Add ability to send custom HTTP headers (Chocobo1)
+    - WEBUI: Expand RSS related API (Sepro)
+    - WINDOWS: Installer: Update german translation (schnurlos)
+
+Wed Apr 22 2020 - sledgehammer999 <sledgehammer999@qbittorrent.org> - v4.2.4
+    - BUGFIX: Fix sub-sorting of Transfer list (glassez)
+    - BUGFIX: Fix wrong logic that disables "prevent sleeping" timer (Chocobo1)
+    - BUGFIX: Set disk cache size for older libtorrent versions (NotTsunami)
+    - BUGFIX: Sort locale language list (Chocobo1)
+    - BUGFIX: Remove white outline around mascot.png (adem)
+    - BUGFIX: Various fixes in configuring the chosen network interface and not leaking the IP (Raif Atef, an0n666)
+    - BUGFIX: Save "resume data" when torrent storage is moved (glassez)
+    - BUGFIX: Avoid holding encoded resume data in memory (Chocobo1)
+    - BUGFIX: Fix date format for "Last seen complete" (Chocobo1)
+    - BUGFIX: Remove deprecated strict super seeding mode from advanced settings (an0n666)
+    - BUGFIX: Change default stop_tracker_timeout settings (an0n666)
+    - BUGFIX: Convert the Log widget to use custom View/Model (jagannatharjun)
+    - BUGFIX: Change default upload slot choking limits (an0n666)
+    - BUGFIX: Don't uncheck Authentication checkbox when changing proxy type (thalieht)
+    - BUGFIX: Reduce ambiguity for selecting tray icons (Chocobo1)
+    - WEBUI: Fix unable to add multiple peers in WebUI (Sepro)
+    - WEBUI: Fix UPnP lease duration get/set (NotTsunami)
+    - SEARCH: Detect python3 executable on Windows (József Sallai)
+
 Wed Apr 01 2020 - sledgehammer999 <sledgehammer999@qbittorrent.org> - v4.2.3
     - FEATURE: Add logging for SOCKS5 proxy errors (Chocobo1)
     - FEATURE: Add UPnP lease duration advanced option (NotTsunami)

configure

@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.69 for qbittorrent v4.2.3.
+# Generated by GNU Autoconf 2.69 for qbittorrent v4.2.5.
 #
 # Report bugs to <bugs.qbittorrent.org>.
 #
@@ -580,8 +580,8 @@ MAKEFLAGS=
 # Identity of this package.
 PACKAGE_NAME='qbittorrent'
 PACKAGE_TARNAME='qbittorrent'
-PACKAGE_VERSION='v4.2.3'
+PACKAGE_VERSION='v4.2.5'
-PACKAGE_STRING='qbittorrent v4.2.3'
+PACKAGE_STRING='qbittorrent v4.2.5'
 PACKAGE_BUGREPORT='bugs.qbittorrent.org'
 PACKAGE_URL='https://www.qbittorrent.org/'
 
@@ -1302,7 +1302,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-\`configure' configures qbittorrent v4.2.3 to adapt to many kinds of systems.
+\`configure' configures qbittorrent v4.2.5 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1373,7 +1373,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of qbittorrent v4.2.3:";;
+     short | recursive ) echo "Configuration of qbittorrent v4.2.5:";;
    esac
   cat <<\_ACEOF
 
@@ -1509,7 +1509,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-qbittorrent configure v4.2.3
+qbittorrent configure v4.2.5
 generated by GNU Autoconf 2.69
 
 Copyright (C) 2012 Free Software Foundation, Inc.
@@ -1648,7 +1648,7 @@ cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by qbittorrent $as_me v4.2.3, which was
+It was created by qbittorrent $as_me v4.2.5, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   $ $0 $@
@@ -3826,7 +3826,7 @@ fi
 
 # Define the identity of the package.
  PACKAGE='qbittorrent'
- VERSION='v4.2.3'
+ VERSION='v4.2.5'
 
 
 cat >>confdefs.h <<_ACEOF
@@ -6343,7 +6343,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by qbittorrent $as_me v4.2.3, which was
+This file was extended by qbittorrent $as_me v4.2.5, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -6401,7 +6401,7 @@ _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
 ac_cs_version="\\
-qbittorrent config.status v4.2.3
+qbittorrent config.status v4.2.5
 configured by $0, generated by GNU Autoconf 2.69,
   with options \\"\$ac_cs_config\\"
 
@@ -7659,7 +7659,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by qbittorrent $as_me v4.2.3, which was
+This file was extended by qbittorrent $as_me v4.2.5, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -7717,7 +7717,7 @@ _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
 ac_cs_version="\\
-qbittorrent config.status v4.2.3
+qbittorrent config.status v4.2.5
 configured by $0, generated by GNU Autoconf 2.69,
   with options \\"\$ac_cs_config\\"
 

configure.ac

@@ -1,4 +1,4 @@
-AC_INIT([qbittorrent], [v4.2.3], [bugs.qbittorrent.org], [], [https://www.qbittorrent.org/])
+AC_INIT([qbittorrent], [v4.2.5], [bugs.qbittorrent.org], [], [https://www.qbittorrent.org/])
 AC_CONFIG_AUX_DIR([build-aux])
 AC_CONFIG_MACRO_DIR([m4])
 AC_PROG_CC

dist/mac/Info.plist

@@ -55,7 +55,7 @@
 	<key>CFBundlePackageType</key>
 	<string>APPL</string>
 	<key>CFBundleShortVersionString</key>
-	<string>4.2.3</string>
+	<string>4.2.5</string>
 	<key>CFBundleExecutable</key>
 	<string>@EXECUTABLE@</string>
 	<key>CFBundleIdentifier</key>
@@ -88,13 +88,17 @@
 			<key>UTTypeTagSpecification</key>
 			<dict>
 				<key>com.apple.ostype</key>
-				<string>TORR</string>
+				<array>
+					<string>TORR</string>
+				</array>
 				<key>public.filename-extension</key>
 				<array>
 					<string>torrent</string>
 				</array>
 				<key>public.mime-type</key>
-				<string>application/x-bittorrent</string>
+				<array>
+					<string>application/x-bittorrent</string>
+				</array>
 			</dict>
 		</dict>
 	</array>

dist/unix/org.qbittorrent.qBittorrent.appdata.xml

@@ -74,6 +74,6 @@
   <url type="translate">https://github.com/qbittorrent/qBittorrent/wiki/How-to-translate-qBittorrent</url>
   <content_rating type="oars-1.1"/>
   <releases>
-    <release version="4.2.3" date="2020-04-01"/>
+    <release version="4.2.5" date="2020-04-25"/>
   </releases>
 </component>

dist/windows/installer-translations/german.nsi

@@ -15,7 +15,7 @@ LangString inst_magnet ${LANG_GERMAN} "Öffne Magnet-Links mit qBittorrent"
 ;LangString inst_firewall ${LANG_ENGLISH} "Add Windows Firewall rule"
 LangString inst_firewall ${LANG_GERMAN} "Regel in der Windows Firewall hinzufügen"
 ;LangString inst_pathlimit ${LANG_ENGLISH} "Disable Windows path length limit (260 character MAX_PATH limitation, requires Windows 10 1607 or later)"
-LangString inst_pathlimit ${LANG_GERMAN} "Disable Windows path length limit (260 character MAX_PATH limitation, requires Windows 10 1607 or later)"
+LangString inst_pathlimit ${LANG_GERMAN} "Deaktiviere die Windows-Pfadlängenbeschränkung (260 Zeichen Beschränkung von MAX_PATH - erfordert Windows 10 1607 oder höher)"
 ;LangString inst_firewallinfo ${LANG_ENGLISH} "Adding Windows Firewall rule"
 LangString inst_firewallinfo ${LANG_GERMAN} "Füge Regel in der Windows Firewall hinzu"
 ;LangString inst_warning ${LANG_ENGLISH} "qBittorrent is running. Please close the application before installing."

dist/windows/options.nsi

@@ -28,7 +28,7 @@ XPStyle on
 !define CSIDL_LOCALAPPDATA '0x1C' ;Local Application Data path
 
 ; Program specific
-!define PROG_VERSION "4.2.3"
+!define PROG_VERSION "4.2.5"
 
 !define MUI_FINISHPAGE_RUN
 !define MUI_FINISHPAGE_RUN_FUNCTION PageFinishRun

src/app/application.cpp

@@ -61,6 +61,7 @@
 #endif // Q_OS_MACOS
 #endif
 
+#include "base/bittorrent/infohash.h"
 #include "base/bittorrent/session.h"
 #include "base/bittorrent/torrenthandle.h"
 #include "base/exceptions.h"
@@ -133,6 +134,7 @@ Application::Application(int &argc, char **argv)
     , m_commandLineArgs(parseCommandLine(this->arguments()))
 {
     qRegisterMetaType<Log::Msg>("Log::Msg");
+    qRegisterMetaType<Log::Peer>("Log::Peer");
 
     setApplicationName("qBittorrent");
     setOrganizationDomain("qbittorrent.org");

src/app/application.h

@@ -68,7 +68,7 @@ namespace RSS
     class AutoDownloader;
 }
 
-class Application : public BaseApplication
+class Application final : public BaseApplication
 {
     Q_OBJECT
     Q_DISABLE_COPY(Application)

src/app/qtlocalpeer/qtlockedfile.h

@@ -77,7 +77,7 @@
 
 namespace QtLP_Private
 {
-    class QtLockedFile : public QFile
+    class QtLockedFile final : public QFile
     {
     public:
         enum LockMode

src/base/CMakeLists.txt

@@ -22,6 +22,7 @@ bittorrent/session.h
 bittorrent/sessionstatus.h
 bittorrent/torrentcreatorthread.h
 bittorrent/torrenthandle.h
+bittorrent/torrenthandleimpl.h
 bittorrent/torrentinfo.h
 bittorrent/tracker.h
 bittorrent/trackerentry.h
@@ -58,6 +59,7 @@ utils/bytearray.h
 utils/foreignapps.h
 utils/fs.h
 utils/gzip.h
+utils/io.h
 utils/misc.h
 utils/net.h
 utils/password.h
@@ -99,6 +101,7 @@ bittorrent/private/statistics.cpp
 bittorrent/session.cpp
 bittorrent/torrentcreatorthread.cpp
 bittorrent/torrenthandle.cpp
+bittorrent/torrenthandleimpl.cpp
 bittorrent/torrentinfo.cpp
 bittorrent/tracker.cpp
 bittorrent/trackerentry.cpp
@@ -133,6 +136,7 @@ utils/bytearray.cpp
 utils/foreignapps.cpp
 utils/fs.cpp
 utils/gzip.cpp
+utils/io.cpp
 utils/misc.cpp
 utils/net.cpp
 utils/password.cpp

src/base/base.pri

@@ -21,6 +21,7 @@ HEADERS += \
     $$PWD/bittorrent/sessionstatus.h \
     $$PWD/bittorrent/torrentcreatorthread.h \
     $$PWD/bittorrent/torrenthandle.h \
+    $$PWD/bittorrent/torrenthandleimpl.h \
     $$PWD/bittorrent/torrentinfo.h \
     $$PWD/bittorrent/tracker.h \
     $$PWD/bittorrent/trackerentry.h \
@@ -73,6 +74,7 @@ HEADERS += \
     $$PWD/utils/foreignapps.h \
     $$PWD/utils/fs.h \
     $$PWD/utils/gzip.h \
+    $$PWD/utils/io.h \
     $$PWD/utils/misc.h \
     $$PWD/utils/net.h \
     $$PWD/utils/password.h \
@@ -98,6 +100,7 @@ SOURCES += \
     $$PWD/bittorrent/session.cpp \
     $$PWD/bittorrent/torrentcreatorthread.cpp \
     $$PWD/bittorrent/torrenthandle.cpp \
+    $$PWD/bittorrent/torrenthandleimpl.cpp \
     $$PWD/bittorrent/torrentinfo.cpp \
     $$PWD/bittorrent/tracker.cpp \
     $$PWD/bittorrent/trackerentry.cpp \
@@ -143,6 +146,7 @@ SOURCES += \
     $$PWD/utils/foreignapps.cpp \
     $$PWD/utils/fs.cpp \
     $$PWD/utils/gzip.cpp \
+    $$PWD/utils/io.cpp \
     $$PWD/utils/misc.cpp \
     $$PWD/utils/net.cpp \
     $$PWD/utils/password.cpp \

src/base/bittorrent/peerinfo.cpp

@@ -28,6 +28,8 @@
 
 #include "peerinfo.h"
 
+#include <libtorrent/version.hpp>
+
 #include <QBitArray>
 
 #include "base/bittorrent/torrenthandle.h"

src/base/bittorrent/private/filterparserthread.h

@@ -35,7 +35,7 @@
 
 class QDataStream;
 
-class FilterParserThread : public QThread
+class FilterParserThread final : public QThread
 {
     Q_OBJECT
 

src/base/bittorrent/private/nativesessionextension.h

@@ -31,7 +31,7 @@
 #include <libtorrent/extensions.hpp>
 #include <libtorrent/version.hpp>
 
-class NativeSessionExtension : public lt::plugin
+class NativeSessionExtension final : public lt::plugin
 {
 #if (LIBTORRENT_VERSION_NUM >= 10200)
     lt::feature_flags_t implemented_features() override;

src/base/bittorrent/private/nativetorrentextension.cpp

@@ -47,7 +47,7 @@ namespace
 #if (LIBTORRENT_VERSION_NUM < 10200)
         return torrentStatus.auto_managed;
 #else
-        return bool {torrentStatus.flags & lt::torrent_flags::auto_managed};
+        return static_cast<bool>(torrentStatus.flags & lt::torrent_flags::auto_managed);
 #endif
     }
 }

src/base/bittorrent/private/nativetorrentextension.h

@@ -32,7 +32,7 @@
 #include <libtorrent/torrent_handle.hpp>
 #include <libtorrent/version.hpp>
 
-class NativeTorrentExtension : public lt::torrent_plugin
+class NativeTorrentExtension final : public lt::torrent_plugin
 {
 public:
     explicit NativeTorrentExtension(const lt::torrent_handle &torrentHandle);

src/base/bittorrent/private/portforwarderimpl.h

@@ -44,7 +44,7 @@ using LTPortMapping = int;
 using LTPortMapping = lt::port_mapping_t;
 #endif
 
-class PortForwarderImpl : public Net::PortForwarder
+class PortForwarderImpl final : public Net::PortForwarder
 {
     Q_OBJECT
     Q_DISABLE_COPY(PortForwarderImpl)

src/base/bittorrent/private/resumedatasavingmanager.cpp

@@ -28,11 +28,15 @@
 
 #include "resumedatasavingmanager.h"
 
+#include <libtorrent/bencode.hpp>
+#include <libtorrent/entry.hpp>
+
 #include <QByteArray>
 #include <QSaveFile>
 
 #include "base/logger.h"
 #include "base/utils/fs.h"
+#include "base/utils/io.h"
 
 ResumeDataSavingManager::ResumeDataSavingManager(const QString &resumeFolderPath)
     : m_resumeDataDir(resumeFolderPath)
@@ -44,12 +48,27 @@ void ResumeDataSavingManager::save(const QString &filename, const QByteArray &da
     const QString filepath = m_resumeDataDir.absoluteFilePath(filename);
 
     QSaveFile file {filepath};
-    if (file.open(QIODevice::WriteOnly)) {
+    if (!file.open(QIODevice::WriteOnly) || (file.write(data) != data.size()) || !file.commit()) {
-        file.write(data);
+        LogMsg(tr("Couldn't save data to '%1'. Error: %2")
-        if (!file.commit()) {
+            .arg(filepath, file.errorString()), Log::CRITICAL);
-            Logger::instance()->addMessage(QString("Couldn't save data in '%1'. Error: %2")
+    }
-                                           .arg(filepath, file.errorString()), Log::WARNING);
+}
-        }
+
+void ResumeDataSavingManager::save(const QString &filename, const std::shared_ptr<lt::entry> &data) const
+{
+    const QString filepath = m_resumeDataDir.absoluteFilePath(filename);
+
+    QSaveFile file {filepath};
+    if (!file.open(QIODevice::WriteOnly)) {
+        LogMsg(tr("Couldn't save data to '%1'. Error: %2")
+            .arg(filepath, file.errorString()), Log::CRITICAL);
+        return;
+    }
+
+    lt::bencode(Utils::IO::FileDeviceOutputIterator {file}, *data);
+    if ((file.error() != QFileDevice::NoError) || !file.commit()) {
+        LogMsg(tr("Couldn't save data to '%1'. Error: %2")
+            .arg(filepath, file.errorString()), Log::CRITICAL);
     }
 }
 

src/base/bittorrent/private/resumedatasavingmanager.h

@@ -28,6 +28,10 @@
 
 #pragma once
 
+#include <memory>
+
+#include <libtorrent/fwd.hpp>
+
 #include <QDir>
 #include <QObject>
 
@@ -43,8 +47,9 @@ public:
 
 public slots:
     void save(const QString &filename, const QByteArray &data) const;
+    void save(const QString &filename, const std::shared_ptr<lt::entry> &data) const;
     void remove(const QString &filename) const;
 
 private:
-    QDir m_resumeDataDir;
+    const QDir m_resumeDataDir;
 };

src/base/bittorrent/session.cpp

@@ -40,25 +40,6 @@
 #include <iphlpapi.h>
 #endif
 
-#include <QDebug>
-#include <QDir>
-#include <QFile>
-#include <QHostAddress>
-#include <QNetworkAddressEntry>
-#include <QNetworkConfigurationManager>
-#include <QNetworkInterface>
-#include <QRegularExpression>
-#include <QString>
-#include <QThread>
-#include <QTimer>
-#include <QUuid>
-
-#ifdef Q_OS_WIN
-// TODO: Remove together with fixBrokenSavePath()
-#define NEED_TO_FIX_BROKEN_PATH
-#include <QSaveFile>
-#endif
-
 #include <libtorrent/alert_types.hpp>
 #include <libtorrent/bdecode.hpp>
 #include <libtorrent/bencode.hpp>
@@ -78,6 +59,25 @@
 #include <libtorrent/read_resume_data.hpp>
 #endif
 
+#include <QDebug>
+#include <QDir>
+#include <QFile>
+#include <QHostAddress>
+#include <QNetworkAddressEntry>
+#include <QNetworkConfigurationManager>
+#include <QNetworkInterface>
+#include <QRegularExpression>
+#include <QString>
+#include <QThread>
+#include <QTimer>
+#include <QUuid>
+
+#ifdef Q_OS_WIN
+// TODO: Remove together with fixBrokenSavePath()
+#define NEED_TO_FIX_BROKEN_PATH
+#include <QSaveFile>
+#endif
+
 #include "base/algorithm.h"
 #include "base/exceptions.h"
 #include "base/global.h"
@@ -101,7 +101,7 @@
 #include "private/portforwarderimpl.h"
 #include "private/resumedatasavingmanager.h"
 #include "private/statistics.h"
-#include "torrenthandle.h"
+#include "torrenthandleimpl.h"
 #include "tracker.h"
 #include "trackerentry.h"
 
@@ -438,7 +438,11 @@ Session::Session(QObject *parent)
     , m_asyncIOThreads(BITTORRENT_SESSION_KEY("AsyncIOThreadsCount"), 4)
     , m_filePoolSize(BITTORRENT_SESSION_KEY("FilePoolSize"), 40)
     , m_checkingMemUsage(BITTORRENT_SESSION_KEY("CheckingMemUsageSize"), 32)
+#if (LIBTORRENT_VERSION_NUM >= 10206)
     , m_diskCacheSize(BITTORRENT_SESSION_KEY("DiskCacheSize"), -1)
+#else
+    , m_diskCacheSize(BITTORRENT_SESSION_KEY("DiskCacheSize"), 64)
+#endif
     , m_diskCacheTTL(BITTORRENT_SESSION_KEY("DiskCacheTTL"), 60)
     , m_useOSCache(BITTORRENT_SESSION_KEY("UseOSCache"), true)
 #ifdef Q_OS_WIN
@@ -467,12 +471,15 @@ Session::Session(QObject *parent)
     , m_ignoreLimitsOnLAN(BITTORRENT_SESSION_KEY("IgnoreLimitsOnLAN"), false)
     , m_includeOverheadInLimits(BITTORRENT_SESSION_KEY("IncludeOverheadInLimits"), false)
     , m_announceIP(BITTORRENT_SESSION_KEY("AnnounceIP"))
+#if (LIBTORRENT_VERSION_NUM >= 10206)
+    , m_stopTrackerTimeout(BITTORRENT_SESSION_KEY("StopTrackerTimeout"), 5)
+#else
     , m_stopTrackerTimeout(BITTORRENT_SESSION_KEY("StopTrackerTimeout"), 1)
-    , m_isSuperSeedingEnabled(BITTORRENT_SESSION_KEY("SuperSeedingEnabled"), false)
+#endif
     , m_maxConnections(BITTORRENT_SESSION_KEY("MaxConnections"), 500, lowerLimited(0, -1))
-    , m_maxUploads(BITTORRENT_SESSION_KEY("MaxUploads"), -1, lowerLimited(0, -1))
+    , m_maxUploads(BITTORRENT_SESSION_KEY("MaxUploads"), 20, lowerLimited(0, -1))
     , m_maxConnectionsPerTorrent(BITTORRENT_SESSION_KEY("MaxConnectionsPerTorrent"), 100, lowerLimited(0, -1))
-    , m_maxUploadsPerTorrent(BITTORRENT_SESSION_KEY("MaxUploadsPerTorrent"), -1, lowerLimited(0, -1))
+    , m_maxUploadsPerTorrent(BITTORRENT_SESSION_KEY("MaxUploadsPerTorrent"), 4, lowerLimited(0, -1))
     , m_btProtocol(BITTORRENT_SESSION_KEY("BTProtocol"), BTProtocol::Both
         , clampValue(BTProtocol::Both, BTProtocol::UTP))
     , m_isUTPRateLimited(BITTORRENT_SESSION_KEY("uTPRateLimited"), true)
@@ -657,7 +664,7 @@ void Session::setTempPathEnabled(const bool enabled)
 {
     if (enabled != isTempPathEnabled()) {
         m_isTempPathEnabled = enabled;
-        for (TorrentHandle *const torrent : asConst(m_torrents))
+        for (TorrentHandleImpl *const torrent : asConst(m_torrents))
             torrent->handleTempPathChanged();
     }
 }
@@ -671,7 +678,7 @@ void Session::setAppendExtensionEnabled(const bool enabled)
 {
     if (isAppendExtensionEnabled() != enabled) {
         // append or remove .!qB extension for incomplete files
-        for (TorrentHandle *const torrent : asConst(m_torrents))
+        for (TorrentHandleImpl *const torrent : asConst(m_torrents))
             torrent->handleAppendExtensionToggled();
 
         m_isAppendExtensionEnabled = enabled;
@@ -822,12 +829,12 @@ bool Session::editCategory(const QString &name, const QString &savePath)
     m_categories[name] = savePath;
     m_storedCategories = map_cast(m_categories);
     if (isDisableAutoTMMWhenCategorySavePathChanged()) {
-        for (TorrentHandle *const torrent : asConst(torrents()))
+        for (TorrentHandleImpl *const torrent : asConst(m_torrents))
             if (torrent->category() == name)
                 torrent->setAutoTMMEnabled(false);
     }
     else {
-        for (TorrentHandle *const torrent : asConst(torrents()))
+        for (TorrentHandleImpl *const torrent : asConst(m_torrents))
             if (torrent->category() == name)
                 torrent->handleCategorySavePathChanged();
     }
@@ -837,7 +844,7 @@ bool Session::editCategory(const QString &name, const QString &savePath)
 
 bool Session::removeCategory(const QString &name)
 {
-    for (TorrentHandle *const torrent : asConst(torrents()))
+    for (TorrentHandleImpl *const torrent : asConst(m_torrents))
         if (torrent->belongsToCategory(name))
             torrent->setCategory("");
 
@@ -924,7 +931,7 @@ bool Session::addTag(const QString &tag)
 bool Session::removeTag(const QString &tag)
 {
     if (m_tags.remove(tag)) {
-        for (TorrentHandle *const torrent : asConst(torrents()))
+        for (TorrentHandleImpl *const torrent : asConst(m_torrents))
             torrent->removeTag(tag);
         m_storedTags = m_tags.values();
         emit tagRemoved(tag);
@@ -1439,8 +1446,6 @@ void Session::loadLTSettings(lt::settings_pack &settingsPack)
     settingsPack.set_str(lt::settings_pack::announce_ip, announceIP().toStdString());
     // Stop tracker timeout
     settingsPack.set_int(lt::settings_pack::stop_tracker_timeout, stopTrackerTimeout());
-    // Super seeding
-    settingsPack.set_bool(lt::settings_pack::strict_super_seeding, isSuperSeedingEnabled());
     // * Max connections limit
     settingsPack.set_int(lt::settings_pack::connections_limit, maxConnections());
     // * Global max upload slots
@@ -1529,10 +1534,13 @@ void Session::configureNetworkInterfaces(lt::settings_pack &settingsPack)
     for (const QString &ip : asConst(getListeningIPs())) {
         const QHostAddress addr {ip};
         if (!addr.isNull()) {
-            endpoints << ((addr.protocol() == QAbstractSocket::IPv6Protocol)
+            const QString ip = ((addr.protocol() == QAbstractSocket::IPv6Protocol)
                           ? ('[' + Utils::Net::canonicalIPv6Addr(addr).toString() + ']')
-                          : addr.toString())
+                          : addr.toString());
-                         + portString;
+            endpoints << (ip + portString);
+
+            if ((ip != "0.0.0.0") && (ip != "[::]"))
+                outgoingInterfaces << ip;
         }
         else {
             // ip holds an interface name
@@ -1547,6 +1555,10 @@ void Session::configureNetworkInterfaces(lt::settings_pack &settingsPack)
             }
             else {
                 LogMsg(tr("Could not get GUID of network interface: %1").arg(ip) , Log::WARNING);
+                // Since we can't get the GUID, we'll pass the interface name instead.
+                // Otherwise an empty string will be passed to outgoing_interface which will cause IP leak.
+                endpoints << (ip + portString);
+                outgoingInterfaces << ip;
             }
 #else
             endpoints << (ip + portString);
@@ -1555,24 +1567,6 @@ void Session::configureNetworkInterfaces(lt::settings_pack &settingsPack)
         }
     }
 
-    if (outgoingInterfaces.isEmpty()) {
-#ifdef Q_OS_WIN
-        // On Vista+ versions and after Qt 5.5 QNetworkInterface::name() returns
-        // the interface's LUID and not the GUID.
-        // Libtorrent expects GUIDs for the 'outgoing_interfaces' setting.
-        const QString netInterface = networkInterface();
-        if (!netInterface.isEmpty()) {
-            const QString guid = convertIfaceNameToGuid(netInterface);
-            if (!guid.isEmpty())
-                outgoingInterfaces << guid;
-            else
-                LogMsg(tr("Could not get GUID of network interface: %1").arg(netInterface) , Log::WARNING);
-        }
-#else
-        outgoingInterfaces << networkInterface();
-#endif // Q_OS_WIN
-    }
-
     const QString finalEndpoints = endpoints.join(',');
     settingsPack.set_str(lt::settings_pack::listen_interfaces, finalEndpoints.toStdString());
     LogMsg(tr("Trying to listen on: %1", "e.g: Trying to listen on: 192.168.0.1:6881")
@@ -1699,7 +1693,10 @@ void Session::processShareLimits()
 {
     qDebug("Processing share limits...");
 
-    for (TorrentHandle *const torrent : asConst(torrents())) {
+    // We shouldn't iterate over `m_torrents` in the loop below
+    // since `deleteTorrent()` modifies it indirectly
+    const QHash<InfoHash, TorrentHandleImpl *> torrents {m_torrents};
+    for (TorrentHandleImpl *const torrent : torrents) {
         if (torrent->isSeed() && !torrent->isForced()) {
             if (torrent->ratioLimit() != TorrentHandle::NO_RATIO_LIMIT) {
                 const qreal ratio = torrent->realRatio();
@@ -1791,7 +1788,7 @@ TorrentHandle *Session::findTorrent(const InfoHash &hash) const
 
 bool Session::hasActiveTorrents() const
 {
-    return std::any_of(m_torrents.begin(), m_torrents.end(), [](TorrentHandle *torrent)
+    return std::any_of(m_torrents.begin(), m_torrents.end(), [](TorrentHandleImpl *torrent)
     {
         return TorrentFilter::ActiveTorrent.match(torrent);
     });
@@ -1799,7 +1796,7 @@ bool Session::hasActiveTorrents() const
 
 bool Session::hasUnfinishedTorrents() const
 {
-    return std::any_of(m_torrents.begin(), m_torrents.end(), [](const TorrentHandle *torrent)
+    return std::any_of(m_torrents.begin(), m_torrents.end(), [](const TorrentHandleImpl *torrent)
     {
         return (!torrent->isSeed() && !torrent->isPaused());
     });
@@ -1807,7 +1804,7 @@ bool Session::hasUnfinishedTorrents() const
 
 bool Session::hasRunningSeed() const
 {
-    return std::any_of(m_torrents.begin(), m_torrents.end(), [](const TorrentHandle *torrent)
+    return std::any_of(m_torrents.begin(), m_torrents.end(), [](const TorrentHandleImpl *torrent)
     {
         return (torrent->isSeed() && !torrent->isPaused());
     });
@@ -1835,7 +1832,7 @@ void Session::banIP(const QString &ip)
 // and from the disk, if the corresponding deleteOption is chosen
 bool Session::deleteTorrent(const InfoHash &hash, const DeleteOption deleteOption)
 {
-    TorrentHandle *const torrent = m_torrents.take(hash);
+    TorrentHandleImpl *const torrent = m_torrents.take(hash);
     if (!torrent) return false;
 
     qDebug("Deleting torrent with hash: %s", qUtf8Printable(torrent->hash()));
@@ -1920,21 +1917,21 @@ bool Session::cancelLoadMetadata(const InfoHash &hash)
 
 void Session::increaseTorrentsQueuePos(const QVector<InfoHash> &hashes)
 {
-    using ElementType = std::pair<int, TorrentHandle *>;
+    using ElementType = std::pair<int, TorrentHandleImpl *>;
     std::priority_queue<ElementType
         , std::vector<ElementType>
         , std::greater<ElementType>> torrentQueue;
 
     // Sort torrents by queue position
     for (const InfoHash &infoHash : hashes) {
-        TorrentHandle *const torrent = m_torrents.value(infoHash);
+        TorrentHandleImpl *const torrent = m_torrents.value(infoHash);
         if (torrent && !torrent->isSeed())
             torrentQueue.emplace(torrent->queuePosition(), torrent);
     }
 
     // Increase torrents queue position (starting with the one in the highest queue position)
     while (!torrentQueue.empty()) {
-        const TorrentHandle *torrent = torrentQueue.top().second;
+        const TorrentHandleImpl *torrent = torrentQueue.top().second;
         torrentQueuePositionUp(torrent->nativeHandle());
         torrentQueue.pop();
     }
@@ -1944,19 +1941,19 @@ void Session::increaseTorrentsQueuePos(const QVector<InfoHash> &hashes)
 
 void Session::decreaseTorrentsQueuePos(const QVector<InfoHash> &hashes)
 {
-    using ElementType = std::pair<int, TorrentHandle *>;
+    using ElementType = std::pair<int, TorrentHandleImpl *>;
     std::priority_queue<ElementType> torrentQueue;
 
     // Sort torrents by queue position
     for (const InfoHash &infoHash : hashes) {
-        TorrentHandle *const torrent = m_torrents.value(infoHash);
+        TorrentHandleImpl *const torrent = m_torrents.value(infoHash);
         if (torrent && !torrent->isSeed())
             torrentQueue.emplace(torrent->queuePosition(), torrent);
     }
 
     // Decrease torrents queue position (starting with the one in the lowest queue position)
     while (!torrentQueue.empty()) {
-        const TorrentHandle *torrent = torrentQueue.top().second;
+        const TorrentHandleImpl *torrent = torrentQueue.top().second;
         torrentQueuePositionDown(torrent->nativeHandle());
         torrentQueue.pop();
     }
@@ -1969,19 +1966,19 @@ void Session::decreaseTorrentsQueuePos(const QVector<InfoHash> &hashes)
 
 void Session::topTorrentsQueuePos(const QVector<InfoHash> &hashes)
 {
-    using ElementType = std::pair<int, TorrentHandle *>;
+    using ElementType = std::pair<int, TorrentHandleImpl *>;
     std::priority_queue<ElementType> torrentQueue;
 
     // Sort torrents by queue position
     for (const InfoHash &infoHash : hashes) {
-        TorrentHandle *const torrent = m_torrents.value(infoHash);
+        TorrentHandleImpl *const torrent = m_torrents.value(infoHash);
         if (torrent && !torrent->isSeed())
             torrentQueue.emplace(torrent->queuePosition(), torrent);
     }
 
     // Top torrents queue position (starting with the one in the lowest queue position)
     while (!torrentQueue.empty()) {
-        const TorrentHandle *torrent = torrentQueue.top().second;
+        const TorrentHandleImpl *torrent = torrentQueue.top().second;
         torrentQueuePositionTop(torrent->nativeHandle());
         torrentQueue.pop();
     }
@@ -1991,21 +1988,21 @@ void Session::topTorrentsQueuePos(const QVector<InfoHash> &hashes)
 
 void Session::bottomTorrentsQueuePos(const QVector<InfoHash> &hashes)
 {
-    using ElementType = std::pair<int, TorrentHandle *>;
+    using ElementType = std::pair<int, TorrentHandleImpl *>;
     std::priority_queue<ElementType
         , std::vector<ElementType>
         , std::greater<ElementType>> torrentQueue;
 
     // Sort torrents by queue position
     for (const InfoHash &infoHash : hashes) {
-        TorrentHandle *const torrent = m_torrents.value(infoHash);
+        TorrentHandleImpl *const torrent = m_torrents.value(infoHash);
         if (torrent && !torrent->isSeed())
             torrentQueue.emplace(torrent->queuePosition(), torrent);
     }
 
     // Bottom torrents queue position (starting with the one in the highest queue position)
     while (!torrentQueue.empty()) {
-        const TorrentHandle *torrent = torrentQueue.top().second;
+        const TorrentHandleImpl *torrent = torrentQueue.top().second;
         torrentQueuePositionBottom(torrent->nativeHandle());
         torrentQueue.pop();
     }
@@ -2016,15 +2013,20 @@ void Session::bottomTorrentsQueuePos(const QVector<InfoHash> &hashes)
     saveTorrentsQueue();
 }
 
-void Session::handleTorrentSaveResumeDataRequested(const TorrentHandle *torrent)
+void Session::handleTorrentSaveResumeDataRequested(const TorrentHandleImpl *torrent)
 {
     qDebug("Saving resume data is requested for torrent '%s'...", qUtf8Printable(torrent->name()));
     ++m_numResumeData;
 }
 
-QHash<InfoHash, TorrentHandle *> Session::torrents() const
+QVector<TorrentHandle *> Session::torrents() const
 {
-    return m_torrents;
+    QVector<TorrentHandle *> result;
+    result.reserve(m_torrents.size());
+    for (TorrentHandleImpl *torrent : asConst(m_torrents))
+        result << torrent;
+
+    return result;
 }
 
 bool Session::addTorrent(const QString &source, const AddTorrentParams &params)
@@ -2325,7 +2327,7 @@ bool Session::addTorrent_impl(CreateTorrentParams params, const MagnetUri &magne
     if (m_addingTorrents.contains(hash) || m_loadedMetadata.contains(hash))
         return false;
 
-    TorrentHandle *const torrent = m_torrents.value(hash);
+    TorrentHandleImpl *const torrent = m_torrents.value(hash);
     if (torrent) {  // a duplicate torrent is added
         if (torrent->isPrivate() || (!fromMagnetUri && torrentInfo.isPrivate()))
             return false;
@@ -2511,7 +2513,7 @@ bool Session::loadMetadata(const MagnetUri &magnetUri)
     return true;
 }
 
-void Session::exportTorrentFile(TorrentHandle *const torrent, TorrentExportFolder folder)
+void Session::exportTorrentFile(const TorrentHandle *torrent, TorrentExportFolder folder)
 {
     Q_ASSERT(((folder == TorrentExportFolder::Regular) && !torrentExportDirectory().isEmpty()) ||
              ((folder == TorrentExportFolder::Finished) && !finishedTorrentExportDirectory().isEmpty()));
@@ -2537,7 +2539,7 @@ void Session::exportTorrentFile(TorrentHandle *const torrent, TorrentExportFolde
 
 void Session::generateResumeData(const bool final)
 {
-    for (TorrentHandle *const torrent : asConst(m_torrents)) {
+    for (TorrentHandleImpl *const torrent : asConst(m_torrents)) {
         if (!torrent->isValid()) continue;
 
         if (!final && !torrent->needSaveResumeData()) continue;
@@ -2582,15 +2584,17 @@ void Session::saveResumeData()
 
 void Session::saveTorrentsQueue()
 {
+    // store hash in textual representation
     QMap<int, QString> queue; // Use QMap since it should be ordered by key
-    for (const TorrentHandle *torrent : asConst(torrents())) {
+    for (const TorrentHandleImpl *torrent : asConst(m_torrents)) {
         // We require actual (non-cached) queue position here!
-        const int queuePos = LTUnderlyingType<LTQueuePosition> {torrent->nativeHandle().queue_position()};
+        const int queuePos = static_cast<LTUnderlyingType<LTQueuePosition>>(torrent->nativeHandle().queue_position());
         if (queuePos >= 0)
             queue[queuePos] = torrent->hash();
     }
 
     QByteArray data;
+    data.reserve(((InfoHash::length() * 2) + 1) * queue.size());
     for (const QString &hash : asConst(queue))
         data += (hash.toLatin1() + '\n');
 
@@ -2623,10 +2627,10 @@ void Session::setDefaultSavePath(QString path)
     m_defaultSavePath = path;
 
     if (isDisableAutoTMMWhenDefaultSavePathChanged())
-        for (TorrentHandle *const torrent : asConst(torrents()))
+        for (TorrentHandleImpl *const torrent : asConst(m_torrents))
             torrent->setAutoTMMEnabled(false);
     else
-        for (TorrentHandle *const torrent : asConst(torrents()))
+        for (TorrentHandleImpl *const torrent : asConst(m_torrents))
             torrent->handleCategorySavePathChanged();
 }
 
@@ -2637,7 +2641,7 @@ void Session::setTempPath(QString path)
 
     m_tempPath = path;
 
-    for (TorrentHandle *const torrent : asConst(m_torrents))
+    for (TorrentHandleImpl *const torrent : asConst(m_torrents))
         torrent->handleTempPathChanged();
 }
 
@@ -2673,7 +2677,11 @@ QStringList Session::getListeningIPs() const
 
     if (!ifaceAddr.isEmpty() && !allIPv4 && !allIPv6 && configuredAddr.isNull()) {
         LogMsg(tr("Configured network interface address %1 isn't valid.", "Configured network interface address 124.5.158.1 isn't valid.").arg(ifaceAddr), Log::CRITICAL);
-        IPs.append("127.0.0.1"); // Force listening to localhost and avoid accidental connection that will expose user data.
+        // Pass the invalid user configured interface name/address to libtorrent
+        // in hopes that it will come online later.
+        // This will not cause IP leak but allow user to reconnect the interface
+        // and re-establish connection without restarting the client.
+        IPs.append(ifaceAddr);
         return IPs;
     }
 
@@ -2709,7 +2717,7 @@ QStringList Session::getListeningIPs() const
             LogMsg(tr("Can't find the configured address '%1' to listen on"
                     , "Can't find the configured address '192.168.1.3' to listen on")
                 .arg(ifaceAddr), Log::CRITICAL);
-            IPs.append("127.0.0.1"); // Force listening to localhost and avoid accidental connection that will expose user data.
+            IPs.append(ifaceAddr);
         }
 
         return IPs;
@@ -2720,7 +2728,7 @@ QStringList Session::getListeningIPs() const
     if (!networkIFace.isValid()) {
         qDebug("Invalid network interface: %s", qUtf8Printable(ifaceName));
         LogMsg(tr("The network interface defined is invalid: %1").arg(ifaceName), Log::CRITICAL);
-        IPs.append("127.0.0.1"); // Force listening to localhost and avoid accidental connection that will expose user data.
+        IPs.append(ifaceName);
         return IPs;
     }
 
@@ -2741,7 +2749,7 @@ QStringList Session::getListeningIPs() const
         LogMsg(tr("Can't find the configured address '%1' to listen on"
                   , "Can't find the configured address '192.168.1.3' to listen on")
             .arg(ifaceAddr), Log::CRITICAL);
-        IPs.append("127.0.0.1"); // Force listening to localhost and avoid accidental connection that will expose user data.
+        IPs.append(ifaceAddr);
     }
 
     return IPs;
@@ -3680,19 +3688,6 @@ void Session::setStopTrackerTimeout(const int value)
     configureDeferred();
 }
 
-bool Session::isSuperSeedingEnabled() const
-{
-    return m_isSuperSeedingEnabled;
-}
-
-void Session::setSuperSeedingEnabled(const bool enabled)
-{
-    if (enabled != m_isSuperSeedingEnabled) {
-        m_isSuperSeedingEnabled = enabled;
-        configureDeferred();
-    }
-}
-
 int Session::maxConnections() const
 {
     return m_maxConnections;
@@ -3825,48 +3820,48 @@ void Session::updateSeedingLimitTimer()
     }
 }
 
-void Session::handleTorrentShareLimitChanged(TorrentHandle *const torrent)
+void Session::handleTorrentShareLimitChanged(TorrentHandleImpl *const torrent)
 {
     torrent->saveResumeData();
     updateSeedingLimitTimer();
 }
 
-void Session::handleTorrentNameChanged(TorrentHandle *const torrent)
+void Session::handleTorrentNameChanged(TorrentHandleImpl *const torrent)
 {
     torrent->saveResumeData();
 }
 
-void Session::handleTorrentSavePathChanged(TorrentHandle *const torrent)
+void Session::handleTorrentSavePathChanged(TorrentHandleImpl *const torrent)
 {
     torrent->saveResumeData();
     emit torrentSavePathChanged(torrent);
 }
 
-void Session::handleTorrentCategoryChanged(TorrentHandle *const torrent, const QString &oldCategory)
+void Session::handleTorrentCategoryChanged(TorrentHandleImpl *const torrent, const QString &oldCategory)
 {
     torrent->saveResumeData();
     emit torrentCategoryChanged(torrent, oldCategory);
 }
 
-void Session::handleTorrentTagAdded(TorrentHandle *const torrent, const QString &tag)
+void Session::handleTorrentTagAdded(TorrentHandleImpl *const torrent, const QString &tag)
 {
     torrent->saveResumeData();
     emit torrentTagAdded(torrent, tag);
 }
 
-void Session::handleTorrentTagRemoved(TorrentHandle *const torrent, const QString &tag)
+void Session::handleTorrentTagRemoved(TorrentHandleImpl *const torrent, const QString &tag)
 {
     torrent->saveResumeData();
     emit torrentTagRemoved(torrent, tag);
 }
 
-void Session::handleTorrentSavingModeChanged(TorrentHandle *const torrent)
+void Session::handleTorrentSavingModeChanged(TorrentHandleImpl *const torrent)
 {
     torrent->saveResumeData();
     emit torrentSavingModeChanged(torrent);
 }
 
-void Session::handleTorrentTrackersAdded(TorrentHandle *const torrent, const QVector<TrackerEntry> &newTrackers)
+void Session::handleTorrentTrackersAdded(TorrentHandleImpl *const torrent, const QVector<TrackerEntry> &newTrackers)
 {
     torrent->saveResumeData();
 
@@ -3878,7 +3873,7 @@ void Session::handleTorrentTrackersAdded(TorrentHandle *const torrent, const QVe
     emit trackersChanged(torrent);
 }
 
-void Session::handleTorrentTrackersRemoved(TorrentHandle *const torrent, const QVector<TrackerEntry> &deletedTrackers)
+void Session::handleTorrentTrackersRemoved(TorrentHandleImpl *const torrent, const QVector<TrackerEntry> &deletedTrackers)
 {
     torrent->saveResumeData();
 
@@ -3890,27 +3885,27 @@ void Session::handleTorrentTrackersRemoved(TorrentHandle *const torrent, const Q
     emit trackersChanged(torrent);
 }
 
-void Session::handleTorrentTrackersChanged(TorrentHandle *const torrent)
+void Session::handleTorrentTrackersChanged(TorrentHandleImpl *const torrent)
 {
     torrent->saveResumeData();
     emit trackersChanged(torrent);
 }
 
-void Session::handleTorrentUrlSeedsAdded(TorrentHandle *const torrent, const QVector<QUrl> &newUrlSeeds)
+void Session::handleTorrentUrlSeedsAdded(TorrentHandleImpl *const torrent, const QVector<QUrl> &newUrlSeeds)
 {
     torrent->saveResumeData();
     for (const QUrl &newUrlSeed : newUrlSeeds)
         LogMsg(tr("URL seed '%1' was added to torrent '%2'").arg(newUrlSeed.toString(), torrent->name()));
 }
 
-void Session::handleTorrentUrlSeedsRemoved(TorrentHandle *const torrent, const QVector<QUrl> &urlSeeds)
+void Session::handleTorrentUrlSeedsRemoved(TorrentHandleImpl *const torrent, const QVector<QUrl> &urlSeeds)
 {
     torrent->saveResumeData();
     for (const QUrl &urlSeed : urlSeeds)
         LogMsg(tr("URL seed '%1' was removed from torrent '%2'").arg(urlSeed.toString(), torrent->name()));
 }
 
-void Session::handleTorrentMetadataReceived(TorrentHandle *const torrent)
+void Session::handleTorrentMetadataReceived(TorrentHandleImpl *const torrent)
 {
     torrent->saveResumeData();
 
@@ -3931,25 +3926,25 @@ void Session::handleTorrentMetadataReceived(TorrentHandle *const torrent)
     emit torrentMetadataLoaded(torrent);
 }
 
-void Session::handleTorrentPaused(TorrentHandle *const torrent)
+void Session::handleTorrentPaused(TorrentHandleImpl *const torrent)
 {
     if (!torrent->hasError() && !torrent->hasMissingFiles())
         torrent->saveResumeData();
     emit torrentPaused(torrent);
 }
 
-void Session::handleTorrentResumed(TorrentHandle *const torrent)
+void Session::handleTorrentResumed(TorrentHandleImpl *const torrent)
 {
     torrent->saveResumeData();
     emit torrentResumed(torrent);
 }
 
-void Session::handleTorrentChecked(TorrentHandle *const torrent)
+void Session::handleTorrentChecked(TorrentHandleImpl *const torrent)
 {
     emit torrentFinishedChecking(torrent);
 }
 
-void Session::handleTorrentFinished(TorrentHandle *const torrent)
+void Session::handleTorrentFinished(TorrentHandleImpl *const torrent)
 {
     if (!torrent->hasError() && !torrent->hasMissingFiles())
         torrent->saveResumeData();
@@ -3984,45 +3979,40 @@ void Session::handleTorrentFinished(TorrentHandle *const torrent)
         emit allTorrentsFinished();
 }
 
-void Session::handleTorrentResumeDataReady(TorrentHandle *const torrent, const lt::entry &data)
+void Session::handleTorrentResumeDataReady(TorrentHandleImpl *const torrent, const std::shared_ptr<lt::entry> &data)
 {
     --m_numResumeData;
 
     // Separated thread is used for the blocking IO which results in slow processing of many torrents.
-    // Encoding data in parallel while doing IO saves time. Copying lt::entry objects around
+    // Copying lt::entry objects around isn't cheap.
-    // isn't cheap too.
-
-    QByteArray out;
-    out.reserve(1024 * 1024);  // most fastresume file sizes are under 1 MB
-    lt::bencode(std::back_inserter(out), data);
 
     const QString filename = QString::fromLatin1("%1.fastresume").arg(torrent->hash());
 #if (QT_VERSION >= QT_VERSION_CHECK(5, 10, 0))
     QMetaObject::invokeMethod(m_resumeDataSavingManager
-        , [this, filename, out]() { m_resumeDataSavingManager->save(filename, out); });
+        , [this, filename, data]() { m_resumeDataSavingManager->save(filename, data); });
 #else
-    QMetaObject::invokeMethod(m_resumeDataSavingManager, "save",
+    QMetaObject::invokeMethod(m_resumeDataSavingManager, "save"
-                              Q_ARG(QString, filename), Q_ARG(QByteArray, out));
+        , Q_ARG(QString, filename), Q_ARG(std::shared_ptr<lt::entry>, data));
 #endif
 }
 
-void Session::handleTorrentResumeDataFailed(TorrentHandle *const torrent)
+void Session::handleTorrentResumeDataFailed(TorrentHandleImpl *const torrent)
 {
     Q_UNUSED(torrent)
     --m_numResumeData;
 }
 
-void Session::handleTorrentTrackerReply(TorrentHandle *const torrent, const QString &trackerUrl)
+void Session::handleTorrentTrackerReply(TorrentHandleImpl *const torrent, const QString &trackerUrl)
 {
     emit trackerSuccess(torrent, trackerUrl);
 }
 
-void Session::handleTorrentTrackerError(TorrentHandle *const torrent, const QString &trackerUrl)
+void Session::handleTorrentTrackerError(TorrentHandleImpl *const torrent, const QString &trackerUrl)
 {
     emit trackerError(torrent, trackerUrl);
 }
 
-bool Session::addMoveTorrentStorageJob(TorrentHandle *torrent, const QString &newPath, const MoveStorageMode mode)
+bool Session::addMoveTorrentStorageJob(TorrentHandleImpl *torrent, const QString &newPath, const MoveStorageMode mode)
 {
     Q_ASSERT(torrent);
 
@@ -4095,14 +4085,14 @@ void Session::handleMoveTorrentStorageJobFinished(const QString &errorMessage)
     }
 }
 
-void Session::handleTorrentTrackerWarning(TorrentHandle *const torrent, const QString &trackerUrl)
+void Session::handleTorrentTrackerWarning(TorrentHandleImpl *const torrent, const QString &trackerUrl)
 {
     emit trackerWarning(torrent, trackerUrl);
 }
 
 bool Session::hasPerTorrentRatioLimit() const
 {
-    return std::any_of(m_torrents.cbegin(), m_torrents.cend(), [](const TorrentHandle *torrent)
+    return std::any_of(m_torrents.cbegin(), m_torrents.cend(), [](const TorrentHandleImpl *torrent)
     {
         return (torrent->ratioLimit() >= 0);
     });
@@ -4110,7 +4100,7 @@ bool Session::hasPerTorrentRatioLimit() const
 
 bool Session::hasPerTorrentSeedingTimeLimit() const
 {
-    return std::any_of(m_torrents.cbegin(), m_torrents.cend(), [](const TorrentHandle *torrent)
+    return std::any_of(m_torrents.cbegin(), m_torrents.cend(), [](const TorrentHandleImpl *torrent)
     {
         return (torrent->seedingTimeLimit() >= 0);
     });
@@ -4184,7 +4174,7 @@ void Session::disableIPFilter()
 
 void Session::recursiveTorrentDownload(const InfoHash &hash)
 {
-    TorrentHandle *const torrent = m_torrents.value(hash);
+    TorrentHandleImpl *const torrent = m_torrents.value(hash);
     if (!torrent) return;
 
     for (int i = 0; i < torrent->filesCount(); ++i) {
@@ -4494,7 +4484,7 @@ void Session::handleAlert(const lt::alert *a)
 
 void Session::dispatchTorrentAlert(const lt::alert *a)
 {
-    TorrentHandle *const torrent = m_torrents.value(static_cast<const lt::torrent_alert*>(a)->handle.info_hash());
+    TorrentHandleImpl *const torrent = m_torrents.value(static_cast<const lt::torrent_alert*>(a)->handle.info_hash());
     if (torrent) {
         torrent->handleAlert(a);
         return;
@@ -4514,7 +4504,7 @@ void Session::createTorrentHandle(const lt::torrent_handle &nativeHandle)
 
     const CreateTorrentParams params = m_addingTorrents.take(nativeHandle.info_hash());
 
-    TorrentHandle *const torrent = new TorrentHandle(this, nativeHandle, params);
+    TorrentHandleImpl *const torrent = new TorrentHandleImpl(this, nativeHandle, params);
     m_torrents.insert(torrent->hash(), torrent);
 
     const bool fromMagnetUri = !torrent->hasMetadata();
@@ -4658,7 +4648,7 @@ void Session::handleMetadataReceivedAlert(const lt::metadata_received_alert *p)
 
 void Session::handleFileErrorAlert(const lt::file_error_alert *p)
 {
-    TorrentHandle *const torrent = m_torrents.value(p->handle.info_hash());
+    TorrentHandleImpl *const torrent = m_torrents.value(p->handle.info_hash());
     if (!torrent)
         return;
 
@@ -4752,7 +4742,7 @@ void Session::handlePeerBanAlert(const lt::peer_ban_alert *p)
 
 void Session::handleUrlSeedAlert(const lt::url_seed_alert *p)
 {
-    const TorrentHandle *torrent = m_torrents.value(p->handle.info_hash());
+    const TorrentHandleImpl *torrent = m_torrents.value(p->handle.info_hash());
     if (!torrent)
         return;
 
@@ -4983,7 +4973,7 @@ void Session::handleStorageMovedAlert(const lt::storage_moved_alert *p)
 {
     if (m_moveStorageQueue.isEmpty()) return;
 
-    const TorrentHandle *torrent = m_torrents.value(p->handle.info_hash());
+    const TorrentHandleImpl *torrent = m_torrents.value(p->handle.info_hash());
     const MoveStorageJob &currentJob = m_moveStorageQueue.first();
     if (currentJob.torrent != torrent) return;
 
@@ -4995,7 +4985,7 @@ void Session::handleStorageMovedFailedAlert(const lt::storage_moved_failed_alert
 {
     if (m_moveStorageQueue.isEmpty()) return;
 
-    const TorrentHandle *torrent = m_torrents.value(p->handle.info_hash());
+    const TorrentHandleImpl *torrent = m_torrents.value(p->handle.info_hash());
     const MoveStorageJob &currentJob = m_moveStorageQueue.first();
     if (currentJob.torrent != torrent) return;
 
@@ -5008,7 +4998,7 @@ void Session::handleStateUpdateAlert(const lt::state_update_alert *p)
     updatedTorrents.reserve(p->status.size());
 
     for (const lt::torrent_status &status : p->status) {
-        TorrentHandle *const torrent = m_torrents.value(status.info_hash);
+        TorrentHandleImpl *const torrent = m_torrents.value(status.info_hash);
 
         if (!torrent)
             continue;

src/base/bittorrent/session.h

@@ -30,6 +30,7 @@
 #ifndef BITTORRENT_SESSION_H
 #define BITTORRENT_SESSION_H
 
+#include <memory>
 #include <vector>
 
 #include <libtorrent/fwd.hpp>
@@ -92,6 +93,7 @@ namespace BitTorrent
     class InfoHash;
     class MagnetUri;
     class TorrentHandle;
+    class TorrentHandleImpl;
     class Tracker;
     class TrackerEntry;
     struct CreateTorrentParams;
@@ -377,8 +379,6 @@ namespace BitTorrent
         void setAnnounceIP(const QString &ip);
         int stopTrackerTimeout() const;
         void setStopTrackerTimeout(int value);
-        bool isSuperSeedingEnabled() const;
-        void setSuperSeedingEnabled(bool enabled);
         int maxConnections() const;
         void setMaxConnections(int max);
         int maxConnectionsPerTorrent() const;
@@ -412,7 +412,7 @@ namespace BitTorrent
 
         void startUpTorrents();
         TorrentHandle *findTorrent(const InfoHash &hash) const;
-        QHash<InfoHash, TorrentHandle *> torrents() const;
+        QVector<TorrentHandle *> torrents() const;
         bool hasActiveTorrents() const;
         bool hasUnfinishedTorrents() const;
         bool hasRunningSeed() const;
@@ -441,31 +441,31 @@ namespace BitTorrent
         void bottomTorrentsQueuePos(const QVector<InfoHash> &hashes);
 
         // TorrentHandle interface
-        void handleTorrentSaveResumeDataRequested(const TorrentHandle *torrent);
+        void handleTorrentSaveResumeDataRequested(const TorrentHandleImpl *torrent);
-        void handleTorrentShareLimitChanged(TorrentHandle *const torrent);
+        void handleTorrentShareLimitChanged(TorrentHandleImpl *const torrent);
-        void handleTorrentNameChanged(TorrentHandle *const torrent);
+        void handleTorrentNameChanged(TorrentHandleImpl *const torrent);
-        void handleTorrentSavePathChanged(TorrentHandle *const torrent);
+        void handleTorrentSavePathChanged(TorrentHandleImpl *const torrent);
-        void handleTorrentCategoryChanged(TorrentHandle *const torrent, const QString &oldCategory);
+        void handleTorrentCategoryChanged(TorrentHandleImpl *const torrent, const QString &oldCategory);
-        void handleTorrentTagAdded(TorrentHandle *const torrent, const QString &tag);
+        void handleTorrentTagAdded(TorrentHandleImpl *const torrent, const QString &tag);
-        void handleTorrentTagRemoved(TorrentHandle *const torrent, const QString &tag);
+        void handleTorrentTagRemoved(TorrentHandleImpl *const torrent, const QString &tag);
-        void handleTorrentSavingModeChanged(TorrentHandle *const torrent);
+        void handleTorrentSavingModeChanged(TorrentHandleImpl *const torrent);
-        void handleTorrentMetadataReceived(TorrentHandle *const torrent);
+        void handleTorrentMetadataReceived(TorrentHandleImpl *const torrent);
-        void handleTorrentPaused(TorrentHandle *const torrent);
+        void handleTorrentPaused(TorrentHandleImpl *const torrent);
-        void handleTorrentResumed(TorrentHandle *const torrent);
+        void handleTorrentResumed(TorrentHandleImpl *const torrent);
-        void handleTorrentChecked(TorrentHandle *const torrent);
+        void handleTorrentChecked(TorrentHandleImpl *const torrent);
-        void handleTorrentFinished(TorrentHandle *const torrent);
+        void handleTorrentFinished(TorrentHandleImpl *const torrent);
-        void handleTorrentTrackersAdded(TorrentHandle *const torrent, const QVector<TrackerEntry> &newTrackers);
+        void handleTorrentTrackersAdded(TorrentHandleImpl *const torrent, const QVector<TrackerEntry> &newTrackers);
-        void handleTorrentTrackersRemoved(TorrentHandle *const torrent, const QVector<TrackerEntry> &deletedTrackers);
+        void handleTorrentTrackersRemoved(TorrentHandleImpl *const torrent, const QVector<TrackerEntry> &deletedTrackers);
-        void handleTorrentTrackersChanged(TorrentHandle *const torrent);
+        void handleTorrentTrackersChanged(TorrentHandleImpl *const torrent);
-        void handleTorrentUrlSeedsAdded(TorrentHandle *const torrent, const QVector<QUrl> &newUrlSeeds);
+        void handleTorrentUrlSeedsAdded(TorrentHandleImpl *const torrent, const QVector<QUrl> &newUrlSeeds);
-        void handleTorrentUrlSeedsRemoved(TorrentHandle *const torrent, const QVector<QUrl> &urlSeeds);
+        void handleTorrentUrlSeedsRemoved(TorrentHandleImpl *const torrent, const QVector<QUrl> &urlSeeds);
-        void handleTorrentResumeDataReady(TorrentHandle *const torrent, const lt::entry &data);
+        void handleTorrentResumeDataReady(TorrentHandleImpl *const torrent, const std::shared_ptr<lt::entry> &data);
-        void handleTorrentResumeDataFailed(TorrentHandle *const torrent);
+        void handleTorrentResumeDataFailed(TorrentHandleImpl *const torrent);
-        void handleTorrentTrackerReply(TorrentHandle *const torrent, const QString &trackerUrl);
+        void handleTorrentTrackerReply(TorrentHandleImpl *const torrent, const QString &trackerUrl);
-        void handleTorrentTrackerWarning(TorrentHandle *const torrent, const QString &trackerUrl);
+        void handleTorrentTrackerWarning(TorrentHandleImpl *const torrent, const QString &trackerUrl);
-        void handleTorrentTrackerError(TorrentHandle *const torrent, const QString &trackerUrl);
+        void handleTorrentTrackerError(TorrentHandleImpl *const torrent, const QString &trackerUrl);
 
-        bool addMoveTorrentStorageJob(TorrentHandle *torrent, const QString &newPath, MoveStorageMode mode);
+        bool addMoveTorrentStorageJob(TorrentHandleImpl *torrent, const QString &newPath, MoveStorageMode mode);
 
     signals:
         void addTorrentFailed(const QString &error);
@@ -522,7 +522,7 @@ namespace BitTorrent
     private:
         struct MoveStorageJob
         {
-            TorrentHandle *torrent;
+            TorrentHandleImpl *torrent;
             QString path;
             MoveStorageMode mode;
         };
@@ -572,7 +572,7 @@ namespace BitTorrent
         bool findIncompleteFiles(TorrentInfo &torrentInfo, QString &savePath) const;
 
         void updateSeedingLimitTimer();
-        void exportTorrentFile(TorrentHandle *const torrent, TorrentExportFolder folder = TorrentExportFolder::Regular);
+        void exportTorrentFile(const TorrentHandle *torrent, TorrentExportFolder folder = TorrentExportFolder::Regular);
 
         void handleAlert(const lt::alert *a);
         void dispatchTorrentAlert(const lt::alert *a);
@@ -657,7 +657,6 @@ namespace BitTorrent
         CachedSettingValue<bool> m_includeOverheadInLimits;
         CachedSettingValue<QString> m_announceIP;
         CachedSettingValue<int> m_stopTrackerTimeout;
-        CachedSettingValue<bool> m_isSuperSeedingEnabled;
         CachedSettingValue<int> m_maxConnections;
         CachedSettingValue<int> m_maxUploads;
         CachedSettingValue<int> m_maxConnectionsPerTorrent;
@@ -735,7 +734,7 @@ namespace BitTorrent
         ResumeDataSavingManager *m_resumeDataSavingManager = nullptr;
 
         QHash<InfoHash, TorrentInfo> m_loadedMetadata;
-        QHash<InfoHash, TorrentHandle *> m_torrents;
+        QHash<InfoHash, TorrentHandleImpl *> m_torrents;
         QHash<InfoHash, CreateTorrentParams> m_addingTorrents;
         QHash<QString, AddTorrentParams> m_downloadedTorrents;
         QHash<InfoHash, RemovingTorrentData> m_removingTorrents;
@@ -760,4 +759,9 @@ namespace BitTorrent
     };
 }
 
+#if (QT_VERSION < QT_VERSION_CHECK(5, 10, 0))
+Q_DECLARE_METATYPE(std::shared_ptr<lt::entry>)
+const int sharedPtrLtEntryTypeID = qRegisterMetaType<std::shared_ptr<lt::entry>>();
+#endif
+
 #endif // BITTORRENT_SESSION_H

src/base/bittorrent/torrentcreatorthread.cpp

@@ -41,8 +41,10 @@
 #include <QFileInfo>
 #include <QHash>
 
+#include "base/exceptions.h"
 #include "base/global.h"
 #include "base/utils/fs.h"
+#include "base/utils/io.h"
 #include "base/utils/string.h"
 #include "private/ltunderlyingtype.h"
 
@@ -162,7 +164,7 @@ void TorrentCreatorThread::run()
         lt::set_piece_hashes(newTorrent, Utils::Fs::toNativePath(parentPath).toStdString()
             , [this, &newTorrent](const LTPieceIndex n)
         {
-            sendProgressSignal(LTUnderlyingType<LTPieceIndex> {n}, newTorrent.num_pieces());
+            sendProgressSignal(static_cast<LTUnderlyingType<LTPieceIndex>>(n), newTorrent.num_pieces());
         });
         // Set qBittorrent as creator and add user comment to
         // torrent_info structure
@@ -182,19 +184,19 @@ void TorrentCreatorThread::run()
         if (isInterruptionRequested()) return;
 
         // create the torrent
-        std::ofstream outfile(
+        QFile outfile {m_params.savePath};
-#ifdef _MSC_VER
+        if (!outfile.open(QIODevice::WriteOnly)) {
-            Utils::Fs::toNativePath(m_params.savePath).toStdWString().c_str()
+            throw RuntimeError {tr("Create new torrent file failed. Reason: %1")
-#else
+                .arg(outfile.errorString())};
-            Utils::Fs::toNativePath(m_params.savePath).toUtf8().constData()
+        }
-#endif
-            , (std::ios_base::out | std::ios_base::binary | std::ios_base::trunc));
-        if (outfile.fail())
-            throw std::runtime_error(tr("create new torrent file failed").toStdString());
 
         if (isInterruptionRequested()) return;
 
-        lt::bencode(std::ostream_iterator<char>(outfile), entry);
+        lt::bencode(Utils::IO::FileDeviceOutputIterator {outfile}, entry);
+        if (outfile.error() != QFileDevice::NoError) {
+            throw RuntimeError {tr("Create new torrent file failed. Reason: %1")
+                .arg(outfile.errorString())};
+        }
         outfile.close();
 
         emit updateProgress(100);

src/base/bittorrent/torrentcreatorthread.h

@@ -48,7 +48,7 @@ namespace BitTorrent
         QStringList urlSeeds;
     };
 
-    class TorrentCreatorThread : public QThread
+    class TorrentCreatorThread final : public QThread
     {
         Q_OBJECT
 

src/base/bittorrent/torrenthandle.h

@@ -27,84 +27,30 @@
  * exception statement from your version.
  */
 
-#ifndef BITTORRENT_TORRENTHANDLE_H
+#pragma once
-#define BITTORRENT_TORRENTHANDLE_H
 
-#include <functional>
-
-#include <libtorrent/fwd.hpp>
-#include <libtorrent/torrent_handle.hpp>
-#include <libtorrent/torrent_status.hpp>
-
-#include <QDateTime>
 #include <QHash>
-#include <QObject>
+#include <QMetaType>
-#include <QQueue>
 #include <QSet>
 #include <QString>
 #include <QVector>
 
-#include "private/speedmonitor.h"
-#include "infohash.h"
-#include "torrentinfo.h"
-
-extern const QString QB_EXT;
-
 class QBitArray;
 class QDateTime;
 class QStringList;
 class QUrl;
 
+extern const QString QB_EXT;
+
 namespace BitTorrent
 {
     enum class DownloadPriority;
+    class InfoHash;
     class PeerInfo;
-    class Session;
+    class TorrentInfo;
     class TrackerEntry;
-    struct AddTorrentParams;
     struct PeerAddress;
 
-    struct CreateTorrentParams
-    {
-        bool restored; // is existing torrent job?
-        // for both new and restored torrents
-        QString name;
-        QString category;
-        QSet<QString> tags;
-        QString savePath;
-        bool disableTempPath;
-        bool sequential;
-        bool firstLastPiecePriority;
-        bool hasSeedStatus;
-        bool skipChecking;
-        bool hasRootFolder;
-        bool forced;
-        bool paused;
-        int uploadLimit;
-        int downloadLimit;
-        // for new torrents
-        QVector<DownloadPriority> filePriorities;
-        QDateTime addedTime;
-        // for restored torrents
-        qreal ratioLimit;
-        int seedingTimeLimit;
-
-        CreateTorrentParams();
-        explicit CreateTorrentParams(const AddTorrentParams &params);
-    };
-
-    struct TrackerInfo
-    {
-        QString lastMessage;
-        int numPeers = 0;
-    };
-
-    enum class MoveStorageMode
-    {
-        KeepExistingFiles,
-        Overwrite
-    };
-
     enum class TorrentState
     {
         Unknown = -1,
@@ -135,13 +81,16 @@ namespace BitTorrent
         Error
     };
 
+    struct TrackerInfo
+    {
+        QString lastMessage;
+        int numPeers = 0;
+    };
+
     uint qHash(TorrentState key, uint seed);
 
-    class TorrentHandle : public QObject
+    class TorrentHandle
     {
-        Q_DISABLE_COPY(TorrentHandle)
-        Q_DECLARE_TR_FUNCTIONS(BitTorrent::TorrentHandle)
-
     public:
         static const qreal USE_GLOBAL_RATIO;
         static const qreal NO_RATIO_LIMIT;
@@ -152,24 +101,21 @@ namespace BitTorrent
         static const qreal MAX_RATIO;
         static const int MAX_SEEDING_TIME;
 
-        TorrentHandle(Session *session, const lt::torrent_handle &nativeHandle,
+        virtual ~TorrentHandle() = default;
-                          const CreateTorrentParams &params);
-        ~TorrentHandle();
 
-        bool isValid() const;
+        virtual InfoHash hash() const = 0;
-        InfoHash hash() const;
+        virtual QString name() const = 0;
-        QString name() const;
+        virtual QDateTime creationDate() const = 0;
-        QDateTime creationDate() const;
+        virtual QString creator() const = 0;
-        QString creator() const;
+        virtual QString comment() const = 0;
-        QString comment() const;
+        virtual bool isPrivate() const = 0;
-        bool isPrivate() const;
+        virtual qlonglong totalSize() const = 0;
-        qlonglong totalSize() const;
+        virtual qlonglong wantedSize() const = 0;
-        qlonglong wantedSize() const;
+        virtual qlonglong completedSize() const = 0;
-        qlonglong completedSize() const;
+        virtual qlonglong incompletedSize() const = 0;
-        qlonglong incompletedSize() const;
+        virtual qlonglong pieceLength() const = 0;
-        qlonglong pieceLength() const;
+        virtual qlonglong wastedSize() const = 0;
-        qlonglong wastedSize() const;
+        virtual QString currentTracker() const = 0;
-        QString currentTracker() const;
 
         // 1. savePath() - the path where all the files and subfolders of torrent are stored (as always).
         // 2. rootPath() - absolute path of torrent file tree (save path + first item from 1st torrent file path).
@@ -214,237 +160,140 @@ namespace BitTorrent
         // | B | /home/user/torrents/torrentB | /home/user/torrents/torrentB/subdir1/file1 |
         // | C | /home/user/torrents/file1    | /home/user/torrents/file1                  |
 
-        QString savePath(bool actual = false) const;
+        virtual QString savePath(bool actual = false) const = 0;
-        QString rootPath(bool actual = false) const;
+        virtual QString rootPath(bool actual = false) const = 0;
-        QString contentPath(bool actual = false) const;
+        virtual QString contentPath(bool actual = false) const = 0;
 
-        bool useTempPath() const;
+        virtual bool useTempPath() const = 0;
 
-        bool isAutoTMMEnabled() const;
+        virtual bool isAutoTMMEnabled() const = 0;
-        void setAutoTMMEnabled(bool enabled);
+        virtual void setAutoTMMEnabled(bool enabled) = 0;
-        QString category() const;
+        virtual QString category() const = 0;
-        bool belongsToCategory(const QString &category) const;
+        virtual bool belongsToCategory(const QString &category) const = 0;
-        bool setCategory(const QString &category);
+        virtual bool setCategory(const QString &category) = 0;
 
-        QSet<QString> tags() const;
+        virtual QSet<QString> tags() const = 0;
-        bool hasTag(const QString &tag) const;
+        virtual bool hasTag(const QString &tag) const = 0;
-        bool addTag(const QString &tag);
+        virtual bool addTag(const QString &tag) = 0;
-        bool removeTag(const QString &tag);
+        virtual bool removeTag(const QString &tag) = 0;
-        void removeAllTags();
+        virtual void removeAllTags() = 0;
 
-        bool hasRootFolder() const;
+        virtual bool hasRootFolder() const = 0;
 
-        int filesCount() const;
+        virtual int filesCount() const = 0;
-        int piecesCount() const;
+        virtual int piecesCount() const = 0;
-        int piecesHave() const;
+        virtual int piecesHave() const = 0;
-        qreal progress() const;
+        virtual qreal progress() const = 0;
-        QDateTime addedTime() const;
+        virtual QDateTime addedTime() const = 0;
-        qreal ratioLimit() const;
+        virtual qreal ratioLimit() const = 0;
-        int seedingTimeLimit() const;
+        virtual int seedingTimeLimit() const = 0;
 
-        QString filePath(int index) const;
+        virtual QString filePath(int index) const = 0;
-        QString fileName(int index) const;
+        virtual QString fileName(int index) const = 0;
-        qlonglong fileSize(int index) const;
+        virtual qlonglong fileSize(int index) const = 0;
-        QStringList absoluteFilePaths() const;
+        virtual QStringList absoluteFilePaths() const = 0;
-        QStringList absoluteFilePathsUnwanted() const;
+        virtual QStringList absoluteFilePathsUnwanted() const = 0;
-        QVector<DownloadPriority> filePriorities() const;
+        virtual QVector<DownloadPriority> filePriorities() const = 0;
-
-        TorrentInfo info() const;
-        bool isSeed() const;
-        bool isPaused() const;
-        bool isResumed() const;
-        bool isQueued() const;
-        bool isForced() const;
-        bool isChecking() const;
-        bool isDownloading() const;
-        bool isUploading() const;
-        bool isCompleted() const;
-        bool isActive() const;
-        bool isInactive() const;
-        bool isErrored() const;
-        bool isSequentialDownload() const;
-        bool hasFirstLastPiecePriority() const;
-        TorrentState state() const;
-        bool hasMetadata() const;
-        bool hasMissingFiles() const;
-        bool hasError() const;
-        bool hasFilteredPieces() const;
-        int queuePosition() const;
-        QVector<TrackerEntry> trackers() const;
-        QHash<QString, TrackerInfo> trackerInfos() const;
-        QVector<QUrl> urlSeeds() const;
-        QString error() const;
-        qlonglong totalDownload() const;
-        qlonglong totalUpload() const;
-        qlonglong activeTime() const;
-        qlonglong finishedTime() const;
-        qlonglong seedingTime() const;
-        qlonglong eta() const;
-        QVector<qreal> filesProgress() const;
-        int seedsCount() const;
-        int peersCount() const;
-        int leechsCount() const;
-        int totalSeedsCount() const;
-        int totalPeersCount() const;
-        int totalLeechersCount() const;
-        int completeCount() const;
-        int incompleteCount() const;
-        QDateTime lastSeenComplete() const;
-        QDateTime completedTime() const;
-        qlonglong timeSinceUpload() const;
-        qlonglong timeSinceDownload() const;
-        qlonglong timeSinceActivity() const;
-        int downloadLimit() const;
-        int uploadLimit() const;
-        bool superSeeding() const;
-        QVector<PeerInfo> peers() const;
-        QBitArray pieces() const;
-        QBitArray downloadingPieces() const;
-        QVector<int> pieceAvailability() const;
-        qreal distributedCopies() const;
-        qreal maxRatio() const;
-        int maxSeedingTime() const;
-        qreal realRatio() const;
-        int uploadPayloadRate() const;
-        int downloadPayloadRate() const;
-        qlonglong totalPayloadUpload() const;
-        qlonglong totalPayloadDownload() const;
-        int connectionsCount() const;
-        int connectionsLimit() const;
-        qlonglong nextAnnounce() const;
-
-        void setName(const QString &name);
-        void setSequentialDownload(bool enable);
-        void toggleSequentialDownload();
-        void setFirstLastPiecePriority(bool enabled);
-        void toggleFirstLastPiecePriority();
-        void pause();
-        void resume(bool forced = false);
-        void move(QString path);
-        void forceReannounce(int index = -1);
-        void forceDHTAnnounce();
-        void forceRecheck();
-        void renameFile(int index, const QString &name);
-        void prioritizeFiles(const QVector<DownloadPriority> &priorities);
-        void setRatioLimit(qreal limit);
-        void setSeedingTimeLimit(int limit);
-        void setUploadLimit(int limit);
-        void setDownloadLimit(int limit);
-        void setSuperSeeding(bool enable);
-        void flushCache() const;
-        void addTrackers(const QVector<TrackerEntry> &trackers);
-        void replaceTrackers(const QVector<TrackerEntry> &trackers);
-        void addUrlSeeds(const QVector<QUrl> &urlSeeds);
-        void removeUrlSeeds(const QVector<QUrl> &urlSeeds);
-        bool connectPeer(const PeerAddress &peerAddress);
-
-        QString toMagnetUri() const;
-
-        bool needSaveResumeData() const;
-
-        // Session interface
-        lt::torrent_handle nativeHandle() const;
-
-        void handleAlert(const lt::alert *a);
-        void handleStateUpdate(const lt::torrent_status &nativeStatus);
-        void handleTempPathChanged();
-        void handleCategorySavePathChanged();
-        void handleAppendExtensionToggled();
-        void saveResumeData();
-        void handleStorageMoved(const QString &newPath, const QString &errorMessage);
 
+        virtual TorrentInfo info() const = 0;
+        virtual bool isSeed() const = 0;
+        virtual bool isPaused() const = 0;
+        virtual bool isResumed() const = 0;
+        virtual bool isQueued() const = 0;
+        virtual bool isForced() const = 0;
+        virtual bool isChecking() const = 0;
+        virtual bool isDownloading() const = 0;
+        virtual bool isUploading() const = 0;
+        virtual bool isCompleted() const = 0;
+        virtual bool isActive() const = 0;
+        virtual bool isInactive() const = 0;
+        virtual bool isErrored() const = 0;
+        virtual bool isSequentialDownload() const = 0;
+        virtual bool hasFirstLastPiecePriority() const = 0;
+        virtual TorrentState state() const = 0;
+        virtual bool hasMetadata() const = 0;
+        virtual bool hasMissingFiles() const = 0;
+        virtual bool hasError() const = 0;
+        virtual bool hasFilteredPieces() const = 0;
+        virtual int queuePosition() const = 0;
+        virtual QVector<TrackerEntry> trackers() const = 0;
+        virtual QHash<QString, TrackerInfo> trackerInfos() const = 0;
+        virtual QVector<QUrl> urlSeeds() const = 0;
+        virtual QString error() const = 0;
+        virtual qlonglong totalDownload() const = 0;
+        virtual qlonglong totalUpload() const = 0;
+        virtual qlonglong activeTime() const = 0;
+        virtual qlonglong finishedTime() const = 0;
+        virtual qlonglong seedingTime() const = 0;
+        virtual qlonglong eta() const = 0;
+        virtual QVector<qreal> filesProgress() const = 0;
+        virtual int seedsCount() const = 0;
+        virtual int peersCount() const = 0;
+        virtual int leechsCount() const = 0;
+        virtual int totalSeedsCount() const = 0;
+        virtual int totalPeersCount() const = 0;
+        virtual int totalLeechersCount() const = 0;
+        virtual int completeCount() const = 0;
+        virtual int incompleteCount() const = 0;
+        virtual QDateTime lastSeenComplete() const = 0;
+        virtual QDateTime completedTime() const = 0;
+        virtual qlonglong timeSinceUpload() const = 0;
+        virtual qlonglong timeSinceDownload() const = 0;
+        virtual qlonglong timeSinceActivity() const = 0;
+        virtual int downloadLimit() const = 0;
+        virtual int uploadLimit() const = 0;
+        virtual bool superSeeding() const = 0;
+        virtual QVector<PeerInfo> peers() const = 0;
+        virtual QBitArray pieces() const = 0;
+        virtual QBitArray downloadingPieces() const = 0;
+        virtual QVector<int> pieceAvailability() const = 0;
+        virtual qreal distributedCopies() const = 0;
+        virtual qreal maxRatio() const = 0;
+        virtual int maxSeedingTime() const = 0;
+        virtual qreal realRatio() const = 0;
+        virtual int uploadPayloadRate() const = 0;
+        virtual int downloadPayloadRate() const = 0;
+        virtual qlonglong totalPayloadUpload() const = 0;
+        virtual qlonglong totalPayloadDownload() const = 0;
+        virtual int connectionsCount() const = 0;
+        virtual int connectionsLimit() const = 0;
+        virtual qlonglong nextAnnounce() const = 0;
         /**
          * @brief fraction of file pieces that are available at least from one peer
          *
          * This is not the same as torrrent availability, it is just a fraction of pieces
          * that can be downloaded right now. It varies between 0 to 1.
          */
-        QVector<qreal> availableFileFractions() const;
+        virtual QVector<qreal> availableFileFractions() const = 0;
 
-    private:
+        virtual void setName(const QString &name) = 0;
-        typedef std::function<void ()> EventTrigger;
+        virtual void setSequentialDownload(bool enable) = 0;
+        virtual void setFirstLastPiecePriority(bool enabled) = 0;
+        virtual void pause() = 0;
+        virtual void resume(bool forced = false) = 0;
+        virtual void move(QString path) = 0;
+        virtual void forceReannounce(int index = -1) = 0;
+        virtual void forceDHTAnnounce() = 0;
+        virtual void forceRecheck() = 0;
+        virtual void renameFile(int index, const QString &name) = 0;
+        virtual void prioritizeFiles(const QVector<DownloadPriority> &priorities) = 0;
+        virtual void setRatioLimit(qreal limit) = 0;
+        virtual void setSeedingTimeLimit(int limit) = 0;
+        virtual void setUploadLimit(int limit) = 0;
+        virtual void setDownloadLimit(int limit) = 0;
+        virtual void setSuperSeeding(bool enable) = 0;
+        virtual void flushCache() const = 0;
+        virtual void addTrackers(const QVector<TrackerEntry> &trackers) = 0;
+        virtual void replaceTrackers(const QVector<TrackerEntry> &trackers) = 0;
+        virtual void addUrlSeeds(const QVector<QUrl> &urlSeeds) = 0;
+        virtual void removeUrlSeeds(const QVector<QUrl> &urlSeeds) = 0;
+        virtual bool connectPeer(const PeerAddress &peerAddress) = 0;
 
-#if (LIBTORRENT_VERSION_NUM < 10200)
+        virtual QString createMagnetURI() const = 0;
-        using LTFileIndex = int;
-#else
-        using LTFileIndex = lt::file_index_t;
-#endif
 
-        void updateStatus();
+        void toggleSequentialDownload();
-        void updateStatus(const lt::torrent_status &nativeStatus);
+        void toggleFirstLastPiecePriority();
-        void updateState();
-        void updateTorrentInfo();
-
-        void handleFastResumeRejectedAlert(const lt::fastresume_rejected_alert *p);
-        void handleFileCompletedAlert(const lt::file_completed_alert *p);
-        void handleFileRenamedAlert(const lt::file_renamed_alert *p);
-        void handleFileRenameFailedAlert(const lt::file_rename_failed_alert *p);
-        void handleMetadataReceivedAlert(const lt::metadata_received_alert *p);
-        void handlePerformanceAlert(const lt::performance_alert *p) const;
-        void handleSaveResumeDataAlert(const lt::save_resume_data_alert *p);
-        void handleSaveResumeDataFailedAlert(const lt::save_resume_data_failed_alert *p);
-        void handleTorrentCheckedAlert(const lt::torrent_checked_alert *p);
-        void handleTorrentFinishedAlert(const lt::torrent_finished_alert *p);
-        void handleTorrentPausedAlert(const lt::torrent_paused_alert *p);
-        void handleTorrentResumedAlert(const lt::torrent_resumed_alert *p);
-        void handleTrackerErrorAlert(const lt::tracker_error_alert *p);
-        void handleTrackerReplyAlert(const lt::tracker_reply_alert *p);
-        void handleTrackerWarningAlert(const lt::tracker_warning_alert *p);
-
-        void resume_impl(bool forced);
-        bool isMoveInProgress() const;
-        QString actualStorageLocation() const;
-        bool isAutoManaged() const;
-        void setAutoManaged(bool enable);
-
-        void adjustActualSavePath();
-        void adjustActualSavePath_impl();
-        void move_impl(QString path, MoveStorageMode mode);
-        void moveStorage(const QString &newPath, MoveStorageMode mode);
-        void manageIncompleteFiles();
-        void setFirstLastPiecePriorityImpl(bool enabled, const QVector<DownloadPriority> &updatedFilePrio = {});
-
-        Session *const m_session;
-        lt::torrent_handle m_nativeHandle;
-        lt::torrent_status m_nativeStatus;
-        TorrentState m_state;
-        TorrentInfo m_torrentInfo;
-        SpeedMonitor m_speedMonitor;
-
-        InfoHash m_hash;
-
-        bool m_storageIsMoving = false;
-        // m_moveFinishedTriggers is activated only when the following conditions are met:
-        // all file rename jobs complete, all file move jobs complete
-        QQueue<EventTrigger> m_moveFinishedTriggers;
-        int m_renameCount;
-
-        // Until libtorrent provide an "old_name" field in `file_renamed_alert`
-        // we will rely on this workaround to remove empty leftover folders
-        QHash<LTFileIndex, QVector<QString>> m_oldPath;
-
-        bool m_useAutoTMM;
-
-        // Persistent data
-        QString m_name;
-        QString m_savePath;
-        QString m_category;
-        QSet<QString> m_tags;
-        bool m_hasSeedStatus;
-        qreal m_ratioLimit;
-        int m_seedingTimeLimit;
-        bool m_tempPathDisabled;
-        bool m_fastresumeDataRejected;
-        bool m_hasMissingFiles;
-        bool m_hasRootFolder;
-        bool m_needsToSetFirstLastPiecePriority;
-
-        QHash<QString, TrackerInfo> m_trackerInfos;
-
-        bool m_unchecked = false;
     };
 }
 
 Q_DECLARE_METATYPE(BitTorrent::TorrentState)
-
-#endif // BITTORRENT_TORRENTHANDLE_H

src/base/bittorrent/torrenthandleimpl.h

@@ -0,0 +1,338 @@
+/*
+ * Bittorrent Client using Qt and libtorrent.
+ * Copyright (C) 2015  Vladimir Golovnev <glassez@yandex.ru>
+ * Copyright (C) 2006  Christophe Dumez <chris@qbittorrent.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ * In addition, as a special exception, the copyright holders give permission to
+ * link this program with the OpenSSL project's "OpenSSL" library (or with
+ * modified versions of it that use the same license as the "OpenSSL" library),
+ * and distribute the linked executables. You must obey the GNU General Public
+ * License in all respects for all of the code used other than "OpenSSL".  If you
+ * modify file(s), you may extend this exception to your version of the file(s),
+ * but you are not obligated to do so. If you do not wish to do so, delete this
+ * exception statement from your version.
+ */
+
+#pragma once
+
+#include <functional>
+
+#include <libtorrent/fwd.hpp>
+#include <libtorrent/torrent_handle.hpp>
+#include <libtorrent/torrent_status.hpp>
+
+#include <QDateTime>
+#include <QHash>
+#include <QObject>
+#include <QQueue>
+#include <QSet>
+#include <QString>
+#include <QVector>
+
+#include "private/speedmonitor.h"
+#include "infohash.h"
+#include "torrenthandle.h"
+#include "torrentinfo.h"
+
+namespace BitTorrent
+{
+    class Session;
+    struct AddTorrentParams;
+
+    struct CreateTorrentParams
+    {
+        CreateTorrentParams() = default;
+        explicit CreateTorrentParams(const AddTorrentParams &params);
+
+        // for both new and restored torrents
+        QString name;
+        QString category;
+        QSet<QString> tags;
+        QString savePath;
+        int uploadLimit = -1;
+        int downloadLimit = -1;
+        bool disableTempPath = false;
+        bool sequential = false;
+        bool firstLastPiecePriority = false;
+        bool hasSeedStatus = false;
+        bool skipChecking = false;
+        bool hasRootFolder = true;
+        bool forced = false;
+        bool paused = false;
+        bool restored = false;  // is existing torrent job?
+
+        // for new torrents
+        QVector<DownloadPriority> filePriorities;
+        QDateTime addedTime;
+
+        // for restored torrents
+        qreal ratioLimit = TorrentHandle::USE_GLOBAL_RATIO;
+        int seedingTimeLimit = TorrentHandle::USE_GLOBAL_SEEDING_TIME;
+    };
+
+    enum class MoveStorageMode
+    {
+        KeepExistingFiles,
+        Overwrite
+    };
+
+    class TorrentHandleImpl final : public QObject, public TorrentHandle
+    {
+        Q_DISABLE_COPY(TorrentHandleImpl)
+        Q_DECLARE_TR_FUNCTIONS(BitTorrent::TorrentHandleImpl)
+
+    public:
+        TorrentHandleImpl(Session *session, const lt::torrent_handle &nativeHandle,
+                          const CreateTorrentParams &params);
+        ~TorrentHandleImpl() override;
+
+        bool isValid() const;
+
+        InfoHash hash() const override;
+        QString name() const override;
+        QDateTime creationDate() const override;
+        QString creator() const override;
+        QString comment() const override;
+        bool isPrivate() const override;
+        qlonglong totalSize() const override;
+        qlonglong wantedSize() const override;
+        qlonglong completedSize() const override;
+        qlonglong incompletedSize() const override;
+        qlonglong pieceLength() const override;
+        qlonglong wastedSize() const override;
+        QString currentTracker() const override;
+
+        QString savePath(bool actual = false) const override;
+        QString rootPath(bool actual = false) const override;
+        QString contentPath(bool actual = false) const override;
+
+        bool useTempPath() const override;
+
+        bool isAutoTMMEnabled() const override;
+        void setAutoTMMEnabled(bool enabled) override;
+        QString category() const override;
+        bool belongsToCategory(const QString &category) const override;
+        bool setCategory(const QString &category) override;
+
+        QSet<QString> tags() const override;
+        bool hasTag(const QString &tag) const override;
+        bool addTag(const QString &tag) override;
+        bool removeTag(const QString &tag) override;
+        void removeAllTags() override;
+
+        bool hasRootFolder() const override;
+
+        int filesCount() const override;
+        int piecesCount() const override;
+        int piecesHave() const override;
+        qreal progress() const override;
+        QDateTime addedTime() const override;
+        qreal ratioLimit() const override;
+        int seedingTimeLimit() const override;
+
+        QString filePath(int index) const override;
+        QString fileName(int index) const override;
+        qlonglong fileSize(int index) const override;
+        QStringList absoluteFilePaths() const override;
+        QStringList absoluteFilePathsUnwanted() const override;
+        QVector<DownloadPriority> filePriorities() const override;
+
+        TorrentInfo info() const override;
+        bool isSeed() const override;
+        bool isPaused() const override;
+        bool isResumed() const override;
+        bool isQueued() const override;
+        bool isForced() const override;
+        bool isChecking() const override;
+        bool isDownloading() const override;
+        bool isUploading() const override;
+        bool isCompleted() const override;
+        bool isActive() const override;
+        bool isInactive() const override;
+        bool isErrored() const override;
+        bool isSequentialDownload() const override;
+        bool hasFirstLastPiecePriority() const override;
+        TorrentState state() const override;
+        bool hasMetadata() const override;
+        bool hasMissingFiles() const override;
+        bool hasError() const override;
+        bool hasFilteredPieces() const override;
+        int queuePosition() const override;
+        QVector<TrackerEntry> trackers() const override;
+        QHash<QString, TrackerInfo> trackerInfos() const override;
+        QVector<QUrl> urlSeeds() const override;
+        QString error() const override;
+        qlonglong totalDownload() const override;
+        qlonglong totalUpload() const override;
+        qlonglong activeTime() const override;
+        qlonglong finishedTime() const override;
+        qlonglong seedingTime() const override;
+        qlonglong eta() const override;
+        QVector<qreal> filesProgress() const override;
+        int seedsCount() const override;
+        int peersCount() const override;
+        int leechsCount() const override;
+        int totalSeedsCount() const override;
+        int totalPeersCount() const override;
+        int totalLeechersCount() const override;
+        int completeCount() const override;
+        int incompleteCount() const override;
+        QDateTime lastSeenComplete() const override;
+        QDateTime completedTime() const override;
+        qlonglong timeSinceUpload() const override;
+        qlonglong timeSinceDownload() const override;
+        qlonglong timeSinceActivity() const override;
+        int downloadLimit() const override;
+        int uploadLimit() const override;
+        bool superSeeding() const override;
+        QVector<PeerInfo> peers() const override;
+        QBitArray pieces() const override;
+        QBitArray downloadingPieces() const override;
+        QVector<int> pieceAvailability() const override;
+        qreal distributedCopies() const override;
+        qreal maxRatio() const override;
+        int maxSeedingTime() const override;
+        qreal realRatio() const override;
+        int uploadPayloadRate() const override;
+        int downloadPayloadRate() const override;
+        qlonglong totalPayloadUpload() const override;
+        qlonglong totalPayloadDownload() const override;
+        int connectionsCount() const override;
+        int connectionsLimit() const override;
+        qlonglong nextAnnounce() const override;
+        QVector<qreal> availableFileFractions() const override;
+
+        void setName(const QString &name) override;
+        void setSequentialDownload(bool enable) override;
+        void setFirstLastPiecePriority(bool enabled) override;
+        void pause() override;
+        void resume(bool forced = false) override;
+        void move(QString path) override;
+        void forceReannounce(int index = -1) override;
+        void forceDHTAnnounce() override;
+        void forceRecheck() override;
+        void renameFile(int index, const QString &name) override;
+        void prioritizeFiles(const QVector<DownloadPriority> &priorities) override;
+        void setRatioLimit(qreal limit) override;
+        void setSeedingTimeLimit(int limit) override;
+        void setUploadLimit(int limit) override;
+        void setDownloadLimit(int limit) override;
+        void setSuperSeeding(bool enable) override;
+        void flushCache() const override;
+        void addTrackers(const QVector<TrackerEntry> &trackers) override;
+        void replaceTrackers(const QVector<TrackerEntry> &trackers) override;
+        void addUrlSeeds(const QVector<QUrl> &urlSeeds) override;
+        void removeUrlSeeds(const QVector<QUrl> &urlSeeds) override;
+        bool connectPeer(const PeerAddress &peerAddress) override;
+
+        QString createMagnetURI() const override;
+
+        bool needSaveResumeData() const;
+
+        // Session interface
+        lt::torrent_handle nativeHandle() const;
+
+        void handleAlert(const lt::alert *a);
+        void handleStateUpdate(const lt::torrent_status &nativeStatus);
+        void handleTempPathChanged();
+        void handleCategorySavePathChanged();
+        void handleAppendExtensionToggled();
+        void saveResumeData();
+        void handleStorageMoved(const QString &newPath, const QString &errorMessage);
+
+    private:
+        typedef std::function<void ()> EventTrigger;
+
+#if (LIBTORRENT_VERSION_NUM < 10200)
+        using LTFileIndex = int;
+#else
+        using LTFileIndex = lt::file_index_t;
+#endif
+
+        void updateStatus();
+        void updateStatus(const lt::torrent_status &nativeStatus);
+        void updateState();
+        void updateTorrentInfo();
+
+        void handleFastResumeRejectedAlert(const lt::fastresume_rejected_alert *p);
+        void handleFileCompletedAlert(const lt::file_completed_alert *p);
+        void handleFileRenamedAlert(const lt::file_renamed_alert *p);
+        void handleFileRenameFailedAlert(const lt::file_rename_failed_alert *p);
+        void handleMetadataReceivedAlert(const lt::metadata_received_alert *p);
+        void handlePerformanceAlert(const lt::performance_alert *p) const;
+        void handleSaveResumeDataAlert(const lt::save_resume_data_alert *p);
+        void handleSaveResumeDataFailedAlert(const lt::save_resume_data_failed_alert *p);
+        void handleTorrentCheckedAlert(const lt::torrent_checked_alert *p);
+        void handleTorrentFinishedAlert(const lt::torrent_finished_alert *p);
+        void handleTorrentPausedAlert(const lt::torrent_paused_alert *p);
+        void handleTorrentResumedAlert(const lt::torrent_resumed_alert *p);
+        void handleTrackerErrorAlert(const lt::tracker_error_alert *p);
+        void handleTrackerReplyAlert(const lt::tracker_reply_alert *p);
+        void handleTrackerWarningAlert(const lt::tracker_warning_alert *p);
+
+        void resume_impl(bool forced);
+        bool isMoveInProgress() const;
+        QString actualStorageLocation() const;
+        bool isAutoManaged() const;
+        void setAutoManaged(bool enable);
+
+        void adjustActualSavePath();
+        void adjustActualSavePath_impl();
+        void move_impl(QString path, MoveStorageMode mode);
+        void moveStorage(const QString &newPath, MoveStorageMode mode);
+        void manageIncompleteFiles();
+        void setFirstLastPiecePriorityImpl(bool enabled, const QVector<DownloadPriority> &updatedFilePrio = {});
+
+        Session *const m_session;
+        lt::torrent_handle m_nativeHandle;
+        lt::torrent_status m_nativeStatus;
+        TorrentState m_state = TorrentState::Unknown;
+        TorrentInfo m_torrentInfo;
+        SpeedMonitor m_speedMonitor;
+
+        InfoHash m_hash;
+
+        // m_moveFinishedTriggers is activated only when the following conditions are met:
+        // all file rename jobs complete, all file move jobs complete
+        QQueue<EventTrigger> m_moveFinishedTriggers;
+        int m_renameCount = 0;
+        bool m_storageIsMoving = false;
+
+        // Until libtorrent provide an "old_name" field in `file_renamed_alert`
+        // we will rely on this workaround to remove empty leftover folders
+        QHash<LTFileIndex, QVector<QString>> m_oldPath;
+
+        QHash<QString, TrackerInfo> m_trackerInfos;
+
+        // Persistent data
+        QString m_name;
+        QString m_savePath;
+        QString m_category;
+        QSet<QString> m_tags;
+        qreal m_ratioLimit;
+        int m_seedingTimeLimit;
+        bool m_hasSeedStatus;
+        bool m_tempPathDisabled;
+        bool m_fastresumeDataRejected = false;
+        bool m_hasMissingFiles = false;
+        bool m_hasRootFolder;
+        bool m_needsToSetFirstLastPiecePriority = false;
+        bool m_useAutoTMM;
+
+        bool m_unchecked = false;
+    };
+}

src/base/bittorrent/torrentinfo.cpp

@@ -47,6 +47,7 @@
 #include "base/exceptions.h"
 #include "base/global.h"
 #include "base/utils/fs.h"
+#include "base/utils/io.h"
 #include "base/utils/misc.h"
 #include "infohash.h"
 #include "trackerentry.h"
@@ -166,12 +167,12 @@ void TorrentInfo::saveToFile(const QString &path) const
 #endif
     const lt::entry torrentEntry = torrentCreator.generate();
 
-    QByteArray out;
+    QFile torrentFile {path};
-    out.reserve(1024 * 1024);  // most torrent file sizes are under 1 MB
+    if (!torrentFile.open(QIODevice::WriteOnly))
-    lt::bencode(std::back_inserter(out), torrentEntry);
+        throw RuntimeError {torrentFile.errorString()};
 
-    QFile torrentFile{path};
+    lt::bencode(Utils::IO::FileDeviceOutputIterator {torrentFile}, torrentEntry);
-    if (!torrentFile.open(QIODevice::WriteOnly) || (torrentFile.write(out) != out.size()))
+    if (torrentFile.error() != QFileDevice::NoError)
         throw RuntimeError {torrentFile.errorString()};
 }
 

src/base/bittorrent/tracker.h

@@ -70,7 +70,7 @@ namespace BitTorrent
     // *Basic* Bittorrent tracker implementation
     // [BEP-3] The BitTorrent Protocol Specification
     // also see: https://wiki.theory.org/index.php/BitTorrentSpecification#Tracker_HTTP.2FHTTPS_Protocol
-    class Tracker : public QObject, public Http::IRequestHandler, private Http::ResponseBuilder
+    class Tracker final : public QObject, public Http::IRequestHandler, private Http::ResponseBuilder
     {
         Q_OBJECT
         Q_DISABLE_COPY(Tracker)

src/base/http/server.h

@@ -41,7 +41,7 @@ namespace Http
     class IRequestHandler;
     class Connection;
 
-    class Server : public QTcpServer
+    class Server final : public QTcpServer
     {
         Q_OBJECT
         Q_DISABLE_COPY(Server)

src/base/logger.cpp

@@ -72,7 +72,7 @@ void Logger::freeInstance()
 void Logger::addMessage(const QString &message, const Log::MsgType &type)
 {
     QWriteLocker locker(&m_lock);
-    const Log::Msg msg = {m_msgCounter++, QDateTime::currentMSecsSinceEpoch(), type, message.toHtmlEscaped()};
+    const Log::Msg msg = {m_msgCounter++, type, QDateTime::currentMSecsSinceEpoch(), message};
     m_messages.push_back(msg);
     locker.unlock();
 
@@ -82,7 +82,7 @@ void Logger::addMessage(const QString &message, const Log::MsgType &type)
 void Logger::addPeer(const QString &ip, const bool blocked, const QString &reason)
 {
     QWriteLocker locker(&m_lock);
-    const Log::Peer msg = {m_peerCounter++, QDateTime::currentMSecsSinceEpoch(), ip.toHtmlEscaped(), blocked, reason.toHtmlEscaped()};
+    const Log::Peer msg = {m_peerCounter++, blocked, QDateTime::currentMSecsSinceEpoch(), ip, reason};
     m_peers.push_back(msg);
     locker.unlock();
 

src/base/logger.h

@@ -53,17 +53,17 @@ namespace Log
     struct Msg
     {
         int id;
-        qint64 timestamp;
         MsgType type;
+        qint64 timestamp;
         QString message;
     };
 
     struct Peer
     {
         int id;
+        bool blocked;
         qint64 timestamp;
         QString ip;
-        bool blocked;
         QString reason;
     };
 }

src/base/net/downloadmanager.cpp

@@ -52,7 +52,7 @@ namespace
     // Disguise as Firefox to avoid web server banning
     const char DEFAULT_USER_AGENT[] = "Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Firefox/68.0";
 
-    class NetworkCookieJar : public QNetworkCookieJar
+    class NetworkCookieJar final : public QNetworkCookieJar
     {
     public:
         explicit NetworkCookieJar(QObject *parent = nullptr)

src/base/net/private/downloadhandlerimpl.h

@@ -36,7 +36,7 @@
 class QObject;
 class QUrl;
 
-class DownloadHandlerImpl : public Net::DownloadHandler
+class DownloadHandlerImpl final : public Net::DownloadHandler
 {
     Q_OBJECT
     Q_DISABLE_COPY(DownloadHandlerImpl)

src/base/preferences.cpp

@@ -743,6 +743,26 @@ void Preferences::setWebUiRootFolder(const QString &path)
     setValue("Preferences/WebUI/RootFolder", path);
 }
 
+bool Preferences::isWebUICustomHTTPHeadersEnabled() const
+{
+    return value("Preferences/WebUI/CustomHTTPHeadersEnabled", false).toBool();
+}
+
+void Preferences::setWebUICustomHTTPHeadersEnabled(const bool enabled)
+{
+    setValue("Preferences/WebUI/CustomHTTPHeadersEnabled", enabled);
+}
+
+QString Preferences::getWebUICustomHTTPHeaders() const
+{
+    return value("Preferences/WebUI/CustomHTTPHeaders").toString();
+}
+
+void Preferences::setWebUICustomHTTPHeaders(const QString &headers)
+{
+    setValue("Preferences/WebUI/CustomHTTPHeaders", headers);
+}
+
 bool Preferences::isDynDNSEnabled() const
 {
     return value("Preferences/DynDNS/Enabled", false).toBool();

src/base/preferences.h

@@ -223,6 +223,12 @@ public:
     QString getWebUiRootFolder() const;
     void setWebUiRootFolder(const QString &path);
 
+    // WebUI custom HTTP headers
+    bool isWebUICustomHTTPHeadersEnabled() const;
+    void setWebUICustomHTTPHeadersEnabled(bool enabled);
+    QString getWebUICustomHTTPHeaders() const;
+    void setWebUICustomHTTPHeaders(const QString &headers);
+
     // Dynamic DNS
     bool isDynDNSEnabled() const;
     void setDynDNSEnabled(bool enabled);

src/base/private/profile_p.h

@@ -63,7 +63,7 @@ namespace Private
     };
 
     /// Default implementation. Takes paths from system
-    class DefaultProfile : public Profile
+    class DefaultProfile final : public Profile
     {
     public:
         explicit DefaultProfile(const QString &configurationName);
@@ -86,7 +86,7 @@ namespace Private
     };
 
     /// Custom tree: creates directories under the specified root directory
-    class CustomProfile : public Profile
+    class CustomProfile final : public Profile
     {
     public:
         CustomProfile(const QString &rootPath, const QString &configurationName);
@@ -114,14 +114,14 @@ namespace Private
         virtual ~PathConverter() = default;
     };
 
-    class NoConvertConverter : public PathConverter
+    class NoConvertConverter final : public PathConverter
     {
     public:
         QString toPortablePath(const QString &path) const override;
         QString fromPortablePath(const QString &portablePath) const override;
     };
 
-    class Converter : public PathConverter
+    class Converter final : public PathConverter
     {
     public:
         explicit Converter(const QString &basePath);

src/base/rss/private/rss_parser.cpp

@@ -44,7 +44,7 @@
 
 namespace
 {
-    class XmlStreamEntityResolver : public QXmlStreamEntityResolver
+    class XmlStreamEntityResolver final : public QXmlStreamEntityResolver
     {
     public:
         QString resolveUndeclaredEntity(const QString &name) override

src/base/scanfoldersmodel.h

@@ -36,7 +36,7 @@ class QStringList;
 
 class FileSystemWatcher;
 
-class ScanFoldersModel : public QAbstractListModel
+class ScanFoldersModel final : public QAbstractListModel
 {
     Q_OBJECT
     Q_DISABLE_COPY(ScanFoldersModel)

src/base/torrentfilter.cpp

@@ -28,6 +28,7 @@
 
 #include "torrentfilter.h"
 
+#include "bittorrent/infohash.h"
 #include "bittorrent/torrenthandle.h"
 
 const QString TorrentFilter::AnyCategory;

src/base/unicodestrings.h

@@ -36,58 +36,60 @@
 // Because of the poor handling of UTF-8 characters in MSVC (emits warning C4819),
 // we put all problematic UTF-8 chars/strings in this file.
 // See issue #3059 for more details (https://github.com/qbittorrent/qBittorrent/issues/3059).
-const char C_INFINITY[] = "∞";
+
-const char C_NON_BREAKING_SPACE[] = " ";
 const char C_COPYRIGHT[] = "©";
+const char C_INFINITY[] = "∞";
+const char C_NON_BREAKING_SPACE[] = " ";
 const char C_THIN_SPACE[] = " ";
 const char C_UTP[] = "μTP";
+
+const char C_LOCALE_ARABIC[] = "عربي";
+const char C_LOCALE_ARMENIAN[] = "Հայերեն";
+const char C_LOCALE_BASQUE[] = "Euskara";
+const char C_LOCALE_BULGARIAN[] = "Български";
+const char C_LOCALE_BYELORUSSIAN[] = "Беларуская";
+const char C_LOCALE_CATALAN[] = "Català";
+const char C_LOCALE_CHINESE_SIMPLIFIED[] = "简体中文";
+const char C_LOCALE_CHINESE_TRADITIONAL_HK[] = "香港正體字";
+const char C_LOCALE_CHINESE_TRADITIONAL_TW[] = "正體中文";
+const char C_LOCALE_CROATIAN[] = "Hrvatski";
+const char C_LOCALE_CZECH[] = "Čeština";
+const char C_LOCALE_DANISH[] = "Dansk";
+const char C_LOCALE_DUTCH[] = "Nederlands";
 const char C_LOCALE_ENGLISH[] = "English";
 const char C_LOCALE_ENGLISH_AUSTRALIA[] = "English(Australia)";
 const char C_LOCALE_ENGLISH_UNITEDKINGDOM[] = "English(United Kingdom)";
 const char C_LOCALE_ESPERANTO[] = "Esperanto";
+const char C_LOCALE_FINNISH[] = "Suomi";
 const char C_LOCALE_FRENCH[] = "Français";
+const char C_LOCALE_GALICIAN[] = "Galego";
+const char C_LOCALE_GEORGIAN[] = "ქართული";
 const char C_LOCALE_GERMAN[] = "Deutsch";
+const char C_LOCALE_GREEK[] = "Ελληνικά";
+const char C_LOCALE_HEBREW[] = "עברית";
+const char C_LOCALE_HINDI[] = "हिन्दी, हिंदी";
 const char C_LOCALE_HUNGARIAN[] = "Magyar";
 const char C_LOCALE_ICELANDIC[] = "Íslenska";
 const char C_LOCALE_INDONESIAN[] = "Bahasa Indonesia";
 const char C_LOCALE_ITALIAN[] = "Italiano";
-const char C_LOCALE_DUTCH[] = "Nederlands";
+const char C_LOCALE_JAPANESE[] = "日本語";
-const char C_LOCALE_SPANISH[] = "Español";
+const char C_LOCALE_KOREAN[] = "한글";
-const char C_LOCALE_CATALAN[] = "Català";
-const char C_LOCALE_GALICIAN[] = "Galego";
-const char C_LOCALE_OCCITAN[] = "lenga d'òc";
-const char C_LOCALE_PORTUGUESE[] = "Português";
-const char C_LOCALE_PORTUGUESE_BRAZIL[] = "Português brasileiro";
-const char C_LOCALE_POLISH[] = "Polski";
 const char C_LOCALE_LATVIAN[] = "latviešu valoda";
 const char C_LOCALE_LITHUANIAN[] = "Lietuvių";
 const char C_LOCALE_MALAY[] = "بهاس ملايو";
-const char C_LOCALE_CZECH[] = "Čeština";
+const char C_LOCALE_NORWEGIAN[] = "Norsk";
+const char C_LOCALE_OCCITAN[] = "lenga d'òc";
+const char C_LOCALE_POLISH[] = "Polski";
+const char C_LOCALE_PORTUGUESE[] = "Português";
+const char C_LOCALE_PORTUGUESE_BRAZIL[] = "Português brasileiro";
+const char C_LOCALE_ROMANIAN[] = "Română";
+const char C_LOCALE_RUSSIAN[] = "Русский";
+const char C_LOCALE_SERBIAN[] = "Српски";
 const char C_LOCALE_SLOVAK[] = "Slovenčina";
 const char C_LOCALE_SLOVENIAN[] = "Slovenščina";
-const char C_LOCALE_SERBIAN[] = "Српски";
+const char C_LOCALE_SPANISH[] = "Español";
-const char C_LOCALE_CROATIAN[] = "Hrvatski";
-const char C_LOCALE_ARMENIAN[] = "Հայերեն";
-const char C_LOCALE_ROMANIAN[] = "Română";
-const char C_LOCALE_TURKISH[] = "Türkçe";
-const char C_LOCALE_GREEK[] = "Ελληνικά";
 const char C_LOCALE_SWEDISH[] = "Svenska";
-const char C_LOCALE_FINNISH[] = "Suomi";
+const char C_LOCALE_TURKISH[] = "Türkçe";
-const char C_LOCALE_NORWEGIAN[] = "Norsk";
-const char C_LOCALE_DANISH[] = "Dansk";
-const char C_LOCALE_BULGARIAN[] = "Български";
 const char C_LOCALE_UKRAINIAN[] = "Українська";
 const char C_LOCALE_UZBEK[] = "أۇزبېك‎";
-const char C_LOCALE_RUSSIAN[] = "Русский";
-const char C_LOCALE_JAPANESE[] = "日本語";
-const char C_LOCALE_HEBREW[] = "עברית";
-const char C_LOCALE_HINDI[] = "हिन्दी, हिंदी";
-const char C_LOCALE_ARABIC[] = "عربي";
-const char C_LOCALE_GEORGIAN[] = "ქართული";
-const char C_LOCALE_BYELORUSSIAN[] = "Беларуская";
-const char C_LOCALE_BASQUE[] = "Euskara";
 const char C_LOCALE_VIETNAMESE[] = "tiếng Việt";
-const char C_LOCALE_CHINESE_TRADITIONAL_TW[] = "正體中文";
-const char C_LOCALE_CHINESE_TRADITIONAL_HK[] = "香港正體字";
-const char C_LOCALE_CHINESE_SIMPLIFIED[] = "简体中文";
-const char C_LOCALE_KOREAN[] = "한글";

src/base/utils/foreignapps.cpp

@@ -190,9 +190,17 @@ namespace
                     path = getRegValue(hkInstallPath);
                     ::RegCloseKey(hkInstallPath);
 
-                    if (!path.isEmpty() && QDir(path).exists("python.exe")) {
+                    if (!path.isEmpty()) {
-                        found = true;
+                        const QDir baseDir {path};
-                        path = QDir(path).filePath("python.exe");
+
+                        if (baseDir.exists("python3.exe")) {
+                            found = true;
+                            path = baseDir.filePath("python3.exe");
+                        }
+                        else if (baseDir.exists("python.exe")) {
+                            found = true;
+                            path = baseDir.filePath("python.exe");
+                        }
                     }
                 }
             }
@@ -223,9 +231,13 @@ namespace
         // Fallback: Detect python from default locations
         const QFileInfoList dirs = QDir("C:/").entryInfoList({"Python*"}, QDir::Dirs, (QDir::Name | QDir::Reversed));
         for (const QFileInfo &info : dirs) {
-            const QString path {info.absolutePath() + "/python.exe"};
+            const QString py3Path {info.absolutePath() + "/python3.exe"};
-            if (QFile::exists(path))
+            if (QFile::exists(py3Path))
-                return path;
+                return py3Path;
+
+            const QString pyPath {info.absolutePath() + "/python.exe"};
+            if (QFile::exists(pyPath))
+                return pyPath;
         }
 
         return {};
@@ -247,14 +259,9 @@ PythonInfo Utils::ForeignApps::pythonInfo()
 {
     static PythonInfo pyInfo;
     if (!pyInfo.isValid()) {
-#if defined(Q_OS_UNIX)
-        // On Unix-Like systems python3 should always exist
-        // https://www.python.org/dev/peps/pep-0394/
         if (testPythonInstallation("python3", pyInfo))
             return pyInfo;
-#endif
+
-        // Look for "python" in Windows and in UNIX if "python3" is
-        // not detected.
         if (testPythonInstallation("python", pyInfo))
             return pyInfo;
 

src/base/utils/fs.cpp

@@ -28,6 +28,7 @@
 
 #include "fs.h"
 
+#include <cerrno>
 #include <cstring>
 
 #if defined(Q_OS_WIN)

src/base/utils/io.cpp

@@ -0,0 +1,75 @@
+/*
+ * Bittorrent Client using Qt and libtorrent.
+ * Copyright (C) 2020  Mike Tzou (Chocobo1)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ * In addition, as a special exception, the copyright holders give permission to
+ * link this program with the OpenSSL project's "OpenSSL" library (or with
+ * modified versions of it that use the same license as the "OpenSSL" library),
+ * and distribute the linked executables. You must obey the GNU General Public
+ * License in all respects for all of the code used other than "OpenSSL".  If you
+ * modify file(s), you may extend this exception to your version of the file(s),
+ * but you are not obligated to do so. If you do not wish to do so, delete this
+ * exception statement from your version.
+ */
+
+#include "io.h"
+
+#include <QByteArray>
+#include <QFileDevice>
+
+Utils::IO::FileDeviceOutputIterator::FileDeviceOutputIterator(QFileDevice &device, const int bufferSize)
+    : m_device {&device}
+    , m_buffer {std::make_shared<QByteArray>()}
+    , m_bufferSize {bufferSize}
+{
+    m_buffer->reserve(bufferSize);
+}
+
+Utils::IO::FileDeviceOutputIterator::~FileDeviceOutputIterator()
+{
+    if (m_buffer.use_count() == 1) {
+        if (m_device->error() == QFileDevice::NoError)
+            m_device->write(*m_buffer);
+        m_buffer->clear();
+    }
+}
+
+Utils::IO::FileDeviceOutputIterator &Utils::IO::FileDeviceOutputIterator::operator=(const char c)
+{
+    m_buffer->append(c);
+    if (m_buffer->size() >= m_bufferSize) {
+        if (m_device->error() == QFileDevice::NoError)
+            m_device->write(*m_buffer);
+        m_buffer->clear();
+    }
+    return *this;
+}
+
+Utils::IO::FileDeviceOutputIterator &Utils::IO::FileDeviceOutputIterator::operator*()
+{
+    return *this;
+}
+
+Utils::IO::FileDeviceOutputIterator &Utils::IO::FileDeviceOutputIterator::operator++()
+{
+    return *this;
+}
+
+Utils::IO::FileDeviceOutputIterator &Utils::IO::FileDeviceOutputIterator::operator++(int)
+{
+    return *this;
+}

src/base/utils/io.h

@@ -0,0 +1,63 @@
+/*
+ * Bittorrent Client using Qt and libtorrent.
+ * Copyright (C) 2020  Mike Tzou (Chocobo1)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ * In addition, as a special exception, the copyright holders give permission to
+ * link this program with the OpenSSL project's "OpenSSL" library (or with
+ * modified versions of it that use the same license as the "OpenSSL" library),
+ * and distribute the linked executables. You must obey the GNU General Public
+ * License in all respects for all of the code used other than "OpenSSL".  If you
+ * modify file(s), you may extend this exception to your version of the file(s),
+ * but you are not obligated to do so. If you do not wish to do so, delete this
+ * exception statement from your version.
+ */
+
+#pragma once
+
+#include <iterator>
+#include <memory>
+
+class QByteArray;
+class QFileDevice;
+
+namespace Utils
+{
+    namespace IO
+    {
+        // A wrapper class that satisfy LegacyOutputIterator requirement
+        class FileDeviceOutputIterator
+            : public std::iterator<std::output_iterator_tag, void, void, void, void>
+        {
+        public:
+            explicit FileDeviceOutputIterator(QFileDevice &device, const int bufferSize = (4 * 1024));
+            FileDeviceOutputIterator(const FileDeviceOutputIterator &other) = default;
+            ~FileDeviceOutputIterator();
+
+            // mimic std::ostream_iterator behavior
+            FileDeviceOutputIterator &operator=(char c);
+            // TODO: make these `constexpr` in C++17
+            FileDeviceOutputIterator &operator*();
+            FileDeviceOutputIterator &operator++();
+            FileDeviceOutputIterator &operator++(int);
+
+        private:
+            QFileDevice *m_device;
+            std::shared_ptr<QByteArray> m_buffer;
+            int m_bufferSize;
+        };
+    }
+}

src/gui/CMakeLists.txt

@@ -28,7 +28,9 @@ fspathedit.h
 hidabletabwidget.h
 ipsubnetwhitelistoptionsdialog.h
 lineedit.h
-loglistwidget.h
+log/logfiltermodel.h
+log/loglistview.h
+log/logmodel.h
 mainwindow.h
 optionsdialog.h
 previewlistdelegate.h
@@ -81,7 +83,9 @@ fspathedit.cpp
 hidabletabwidget.cpp
 ipsubnetwhitelistoptionsdialog.cpp
 lineedit.cpp
-loglistwidget.cpp
+log/logfiltermodel.cpp
+log/loglistview.cpp
+log/logmodel.cpp
 mainwindow.cpp
 optionsdialog.cpp
 previewlistdelegate.cpp

src/gui/addnewtorrentdialog.h

@@ -57,7 +57,7 @@ class PropListDelegate;
 class TorrentContentFilterModel;
 class TorrentFileGuard;
 
-class AddNewTorrentDialog : public QDialog
+class AddNewTorrentDialog final : public QDialog
 {
     Q_OBJECT
     Q_DISABLE_COPY(AddNewTorrentDialog)

src/gui/advancedsettings.cpp

@@ -114,7 +114,6 @@ enum AdvSettingsRows
     // seeding
     CHOKING_ALGORITHM,
     SEED_CHOKING_ALGORITHM,
-    SUPER_SEEDING,
     // tracker
     ANNOUNCE_ALL_TRACKERS,
     ANNOUNCE_ALL_TIERS,
@@ -223,8 +222,6 @@ void AdvancedSettings::saveAdvancedSettings()
     // Peer resolution
     pref->resolvePeerCountries(m_checkBoxResolveCountries.isChecked());
     pref->resolvePeerHostNames(m_checkBoxResolveHosts.isChecked());
-    // Super seeding
-    session->setSuperSeedingEnabled(m_checkBoxSuperSeeding.isChecked());
     // Network interface
     if (m_comboBoxInterface.currentIndex() == 0) {
         // All interfaces (default)
@@ -516,10 +513,6 @@ void AdvancedSettings::loadAdvancedSettings()
     // Resolve peer hosts
     m_checkBoxResolveHosts.setChecked(pref->resolvePeerHostNames());
     addRow(RESOLVE_HOSTS, tr("Resolve peer host names"), &m_checkBoxResolveHosts);
-    // Super seeding
-    m_checkBoxSuperSeeding.setChecked(session->isSuperSeedingEnabled());
-    addRow(SUPER_SEEDING, (tr("Strict super seeding") + ' ' + makeLink("https://www.libtorrent.org/reference-Settings.html#strict_super_seeding", "(?)"))
-            , &m_checkBoxSuperSeeding);
     // Network interface
     m_comboBoxInterface.addItem(tr("Any interface", "i.e. Any network interface"));
     const QString currentInterface = session->networkInterface();

src/gui/advancedsettings.h

@@ -61,7 +61,7 @@ private:
              m_spinBoxSaveResumeDataInterval, m_spinBoxOutgoingPortsMin, m_spinBoxOutgoingPortsMax, m_spinBoxUPnPLeaseDuration,
              m_spinBoxListRefresh, m_spinBoxTrackerPort, m_spinBoxCacheTTL, m_spinBoxSendBufferWatermark, m_spinBoxSendBufferLowWatermark,
              m_spinBoxSendBufferWatermarkFactor, m_spinBoxSocketBacklogSize, m_spinBoxStopTrackerTimeout, m_spinBoxSavePathHistoryLength;
-    QCheckBox m_checkBoxOsCache, m_checkBoxRecheckCompleted, m_checkBoxResolveCountries, m_checkBoxResolveHosts, m_checkBoxSuperSeeding,
+    QCheckBox m_checkBoxOsCache, m_checkBoxRecheckCompleted, m_checkBoxResolveCountries, m_checkBoxResolveHosts,
               m_checkBoxProgramNotifications, m_checkBoxTorrentAddedNotifications, m_checkBoxTrackerFavicon, m_checkBoxTrackerStatus,
               m_checkBoxConfirmTorrentRecheck, m_checkBoxConfirmRemoveAllTags, m_checkBoxAnnounceAllTrackers, m_checkBoxAnnounceAllTiers,
               m_checkBoxMultiConnectionsPerIp, m_checkBoxPieceExtentAffinity, m_checkBoxSuggestMode, m_checkBoxCoalesceRW, m_checkBoxSpeedWidgetEnabled;

src/gui/autoexpandabledialog.h

@@ -39,7 +39,7 @@ namespace Ui
     class AutoExpandableDialog;
 }
 
-class AutoExpandableDialog : public QDialog
+class AutoExpandableDialog final : public QDialog
 {
     Q_OBJECT
 

src/gui/categoryfiltermodel.h

@@ -40,7 +40,7 @@ namespace BitTorrent
     class TorrentHandle;
 }
 
-class CategoryFilterModel : public QAbstractItemModel
+class CategoryFilterModel final : public QAbstractItemModel
 {
     Q_OBJECT
 

src/gui/categoryfilterproxymodel.h

@@ -33,7 +33,7 @@
 
 class QString;
 
-class CategoryFilterProxyModel : public QSortFilterProxyModel
+class CategoryFilterProxyModel final : public QSortFilterProxyModel
 {
 public:
     explicit CategoryFilterProxyModel(QObject *parent = nullptr);

src/gui/categoryfilterwidget.h

@@ -30,7 +30,7 @@
 
 #include <QTreeView>
 
-class CategoryFilterWidget : public QTreeView
+class CategoryFilterWidget final : public QTreeView
 {
     Q_OBJECT
     Q_DISABLE_COPY(CategoryFilterWidget)

src/gui/cookiesdialog.h

@@ -38,7 +38,7 @@ namespace Ui
     class CookiesDialog;
 }
 
-class CookiesDialog : public QDialog
+class CookiesDialog final : public QDialog
 {
     Q_OBJECT
 

src/gui/cookiesmodel.h

@@ -33,7 +33,7 @@
 #include <QList>
 #include <QNetworkCookie>
 
-class CookiesModel : public QAbstractItemModel
+class CookiesModel final : public QAbstractItemModel
 {
      Q_OBJECT
 

src/gui/executionlogwidget.cpp

@@ -29,35 +29,48 @@
 #include "executionlogwidget.h"
 
 #include <QDateTime>
+#include <QMenu>
 #include <QPalette>
 
-#include "base/global.h"
+#include "log/logfiltermodel.h"
-#include "loglistwidget.h"
+#include "log/loglistview.h"
+#include "log/logmodel.h"
 #include "ui_executionlogwidget.h"
 #include "uithememanager.h"
 
-ExecutionLogWidget::ExecutionLogWidget(QWidget *parent, const Log::MsgTypes &types)
+ExecutionLogWidget::ExecutionLogWidget(const Log::MsgTypes types, QWidget *parent)
     : QWidget(parent)
     , m_ui(new Ui::ExecutionLogWidget)
-    , m_msgList(new LogListWidget(MAX_LOG_MESSAGES, types, this))
+    , m_messageFilterModel(new LogFilterModel(types, this))
-    , m_peerList(new LogListWidget(MAX_LOG_MESSAGES, Log::ALL, this))
 {
     m_ui->setupUi(this);
 
+    LogMessageModel *messageModel = new LogMessageModel(this);
+    m_messageFilterModel->setSourceModel(messageModel);
+    LogListView *messageView = new LogListView(this);
+    messageView->setModel(m_messageFilterModel);
+    messageView->setContextMenuPolicy(Qt::CustomContextMenu);
+    connect(messageView, &LogListView::customContextMenuRequested, this, [this, messageView, messageModel](const QPoint &pos)
+    {
+        displayContextMenu(pos, messageView, messageModel);
+    });
+
+    LogPeerModel *peerModel = new LogPeerModel(this);
+    LogListView *peerView = new LogListView(this);
+    peerView->setModel(peerModel);
+    peerView->setContextMenuPolicy(Qt::CustomContextMenu);
+    connect(peerView, &LogListView::customContextMenuRequested, this, [this, peerView, peerModel](const QPoint &pos)
+    {
+        displayContextMenu(pos, peerView, peerModel);
+    });
+
+    m_ui->tabGeneral->layout()->addWidget(messageView);
+    m_ui->tabBan->layout()->addWidget(peerView);
+
 #ifndef Q_OS_MACOS
     m_ui->tabConsole->setTabIcon(0, UIThemeManager::instance()->getIcon("view-calendar-journal"));
     m_ui->tabConsole->setTabIcon(1, UIThemeManager::instance()->getIcon("view-filter"));
 #endif
-    m_ui->tabGeneral->layout()->addWidget(m_msgList);
-    m_ui->tabBan->layout()->addWidget(m_peerList);
-
-    const Logger *const logger = Logger::instance();
-    for (const Log::Msg &msg : asConst(logger->getMessages()))
-        addLogMessage(msg);
-    for (const Log::Peer &peer : asConst(logger->getPeers()))
-        addPeerMessage(peer);
-    connect(logger, &Logger::newLogMessage, this, &ExecutionLogWidget::addLogMessage);
-    connect(logger, &Logger::newLogPeer, this, &ExecutionLogWidget::addPeerMessage);
 }
 
 ExecutionLogWidget::~ExecutionLogWidget()
@@ -65,42 +78,24 @@ ExecutionLogWidget::~ExecutionLogWidget()
     delete m_ui;
 }
 
-void ExecutionLogWidget::showMsgTypes(const Log::MsgTypes &types)
+void ExecutionLogWidget::setMessageTypes(const Log::MsgTypes types)
 {
-    m_msgList->showMsgTypes(types);
+    m_messageFilterModel->setMessageTypes(types);
 }
 
-void ExecutionLogWidget::addLogMessage(const Log::Msg &msg)
+void ExecutionLogWidget::displayContextMenu(const QPoint &pos, const LogListView *view, const BaseLogModel *model) const
 {
-    QString colorName;
+    QMenu *menu = new QMenu;
-    switch (msg.type) {
+    menu->setAttribute(Qt::WA_DeleteOnClose);
-    case Log::INFO:
+
-        colorName = QLatin1String("blue");
+    // only show copy action if any of the row is selected
-        break;
+    if (view->currentIndex().isValid()) {
-    case Log::WARNING:
+        const QAction *copyAct = menu->addAction(UIThemeManager::instance()->getIcon("edit-copy"), tr("Copy"));
-        colorName = QLatin1String("orange");
+        connect(copyAct, &QAction::triggered, view, &LogListView::copySelection);
-        break;
-    case Log::CRITICAL:
-        colorName = QLatin1String("red");
-        break;
-    default:
-        colorName = QApplication::palette().color(QPalette::WindowText).name();
     }
 
-    const QDateTime time = QDateTime::fromMSecsSinceEpoch(msg.timestamp);
+    const QAction *clearAct = menu->addAction(UIThemeManager::instance()->getIcon("edit-clear"), tr("Clear"));
-    const QString text = QString::fromLatin1("<font color='grey'>%1</font> - <font color='%2'>%3</font>")
+    connect(clearAct, &QAction::triggered, model, &BaseLogModel::reset);
-        .arg(time.toString(Qt::SystemLocaleShortDate), colorName, msg.message);
-    m_msgList->appendLine(text, msg.type);
-}
 
-void ExecutionLogWidget::addPeerMessage(const Log::Peer &peer)
+    menu->popup(view->mapToGlobal(pos));
-{
-    const QDateTime time = QDateTime::fromMSecsSinceEpoch(peer.timestamp);
-    const QString msg = QString::fromLatin1("<font color='grey'>%1</font> - <font color='red'>%2</font>")
-        .arg(time.toString(Qt::SystemLocaleShortDate), peer.ip);
-
-    const QString text = peer.blocked
-        ? tr("%1 was blocked %2", "0.0.0.0 was blocked due to reason").arg(msg, peer.reason)
-        : tr("%1 was banned", "0.0.0.0 was banned").arg(msg);
-    m_peerList->appendLine(text, Log::NORMAL);
 }

src/gui/executionlogwidget.h

@@ -30,33 +30,33 @@
 #define EXECUTIONLOGWIDGET_H
 
 #include <QWidget>
-#include "base/logger.h"
 
-class LogListWidget;
+#include "base/logger.h"
 
 namespace Ui
 {
     class ExecutionLogWidget;
 }
 
+class BaseLogModel;
+class LogFilterModel;
+class LogListView;
+
 class ExecutionLogWidget : public QWidget
 {
     Q_OBJECT
 
 public:
-    ExecutionLogWidget(QWidget *parent, const Log::MsgTypes &types);
+    ExecutionLogWidget(Log::MsgTypes types, QWidget *parent);
-    void showMsgTypes(const Log::MsgTypes &types);
     ~ExecutionLogWidget();
-
+    
-private slots:
+    void setMessageTypes(Log::MsgTypes types);
-    void addLogMessage(const Log::Msg &msg);
-    void addPeerMessage(const Log::Peer &peer);
 
 private:
-    Ui::ExecutionLogWidget *m_ui;
+    void displayContextMenu(const QPoint &pos, const LogListView *view, const BaseLogModel *model) const;
 
-    LogListWidget *m_msgList;
+    Ui::ExecutionLogWidget *m_ui;
-    LogListWidget *m_peerList;
+    LogFilterModel *m_messageFilterModel;
 };
 
 #endif // EXECUTIONLOGWIDGET_H

src/gui/fspathedit.h

@@ -108,7 +108,7 @@ private:
 };
 
 /// Widget which uses QLineEdit for path editing
-class FileSystemPathLineEdit : public FileSystemPathEdit
+class FileSystemPathLineEdit final : public FileSystemPathEdit
 {
     using base = FileSystemPathEdit;
     using WidgetType = Private::FileLineEdit;
@@ -124,7 +124,7 @@ private:
 };
 
 /// Widget which uses QComboBox for path editing
-class FileSystemPathComboEdit : public FileSystemPathEdit
+class FileSystemPathComboEdit final : public FileSystemPathEdit
 {
     using base = FileSystemPathEdit;
     using WidgetType = Private::FileComboEdit;

src/gui/gui.pri

@@ -22,7 +22,9 @@ HEADERS += \
     $$PWD/hidabletabwidget.h \
     $$PWD/ipsubnetwhitelistoptionsdialog.h \
     $$PWD/lineedit.h \
-    $$PWD/loglistwidget.h \
+    $$PWD/log/logfiltermodel.h \
+    $$PWD/log/loglistview.h \
+    $$PWD/log/logmodel.h \
     $$PWD/mainwindow.h \
     $$PWD/optionsdialog.h \
     $$PWD/previewlistdelegate.h \
@@ -86,7 +88,9 @@ SOURCES += \
     $$PWD/hidabletabwidget.cpp \
     $$PWD/ipsubnetwhitelistoptionsdialog.cpp \
     $$PWD/lineedit.cpp \
-    $$PWD/loglistwidget.cpp \
+    $$PWD/log/logfiltermodel.cpp \
+    $$PWD/log/loglistview.cpp \
+    $$PWD/log/logmodel.cpp \
     $$PWD/mainwindow.cpp \
     $$PWD/optionsdialog.cpp \
     $$PWD/previewlistdelegate.cpp \

src/gui/hidabletabwidget.h

@@ -35,7 +35,7 @@
 class QPaintEvent;
 #endif
 
-class HidableTabWidget : public QTabWidget
+class HidableTabWidget final : public QTabWidget
 {
 public:
     explicit HidableTabWidget(QWidget *parent = nullptr);

src/gui/lineedit.h

@@ -14,7 +14,7 @@
 
 class QToolButton;
 
-class LineEdit : public QLineEdit
+class LineEdit final : public QLineEdit
 {
     Q_OBJECT
 

src/gui/log/logfiltermodel.cpp

@@ -0,0 +1,52 @@
+/*
+ * Bittorrent Client using Qt and libtorrent.
+ * Copyright (C) 2019  sledgehammer999 <hammered999@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ * In addition, as a special exception, the copyright holders give permission to
+ * link this program with the OpenSSL project's "OpenSSL" library (or with
+ * modified versions of it that use the same license as the "OpenSSL" library),
+ * and distribute the linked executables. You must obey the GNU General Public
+ * License in all respects for all of the code used other than "OpenSSL".  If you
+ * modify file(s), you may extend this exception to your version of the file(s),
+ * but you are not obligated to do so. If you do not wish to do so, delete this
+ * exception statement from your version.
+ */
+
+#include "logfiltermodel.h"
+
+#include "logmodel.h"
+
+LogFilterModel::LogFilterModel(const Log::MsgTypes types, QObject *parent)
+    : QSortFilterProxyModel(parent)
+    , m_types(types)
+{
+}
+
+void LogFilterModel::setMessageTypes(const Log::MsgTypes types)
+{
+    m_types = types;
+    invalidateFilter();
+}
+
+bool LogFilterModel::filterAcceptsRow(const int sourceRow, const QModelIndex &sourceParent) const
+{
+    const QAbstractItemModel *const sourceModel = this->sourceModel();
+    const QModelIndex index = sourceModel->index(sourceRow, 0, sourceParent);
+    const Log::MsgType type = static_cast<Log::MsgType>(sourceModel->data(index, BaseLogModel::TypeRole).toInt());
+
+    return m_types.testFlag(type);
+}

src/gui/log/logfiltermodel.h

@@ -0,0 +1,48 @@
+/*
+ * Bittorrent Client using Qt and libtorrent.
+ * Copyright (C) 2019  sledgehammer999 <hammered999@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ * In addition, as a special exception, the copyright holders give permission to
+ * link this program with the OpenSSL project's "OpenSSL" library (or with
+ * modified versions of it that use the same license as the "OpenSSL" library),
+ * and distribute the linked executables. You must obey the GNU General Public
+ * License in all respects for all of the code used other than "OpenSSL".  If you
+ * modify file(s), you may extend this exception to your version of the file(s),
+ * but you are not obligated to do so. If you do not wish to do so, delete this
+ * exception statement from your version.
+ */
+
+#pragma once
+
+#include <QSortFilterProxyModel>
+
+#include "base/logger.h"
+
+class LogFilterModel final : public QSortFilterProxyModel
+{
+    Q_OBJECT
+    Q_DISABLE_COPY(LogFilterModel)
+
+public:
+    explicit LogFilterModel(Log::MsgTypes types = Log::ALL, QObject *parent = nullptr);
+    void setMessageTypes(Log::MsgTypes types);
+
+private:
+    bool filterAcceptsRow(int sourceRow, const QModelIndex &sourceParent) const override;
+
+    Log::MsgTypes m_types;
+};

src/gui/log/loglistview.cpp

@@ -0,0 +1,140 @@
+/*
+ * Bittorrent Client using Qt and libtorrent.
+ * Copyright (C) 2020  Prince Gupta <jagannatharjun11@gmail.com>
+ * Copyright (C) 2019  sledgehammer999 <hammered999@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ * In addition, as a special exception, the copyright holders give permission to
+ * link this program with the OpenSSL project's "OpenSSL" library (or with
+ * modified versions of it that use the same license as the "OpenSSL" library),
+ * and distribute the linked executables. You must obey the GNU General Public
+ * License in all respects for all of the code used other than "OpenSSL".  If you
+ * modify file(s), you may extend this exception to your version of the file(s),
+ * but you are not obligated to do so. If you do not wish to do so, delete this
+ * exception statement from your version.
+ */
+
+#include "loglistview.h"
+
+#include <QApplication>
+#include <QClipboard>
+#include <QFontMetrics>
+#include <QKeyEvent>
+#include <QPainter>
+#include <QStyle>
+#include <QStyledItemDelegate>
+
+#include "logmodel.h"
+#include "uithememanager.h"
+
+namespace
+{
+    const QString SEPARATOR = QStringLiteral(" - ");
+
+    int horizontalAdvance(const QFontMetrics &fontMetrics, const QString &text)
+    {
+#if (QT_VERSION >= QT_VERSION_CHECK(5, 11, 0))
+        return fontMetrics.horizontalAdvance(text);
+#else
+        return fontMetrics.width(text);
+#endif
+    }
+
+    QString logText(const QModelIndex &index)
+    {
+        return QString::fromLatin1("%1%2%3").arg(index.data(BaseLogModel::TimeRole).toString(), SEPARATOR
+                                                 , index.data(BaseLogModel::MessageRole).toString());
+    }
+
+    class LogItemDelegate final : public QStyledItemDelegate
+    {
+    public:
+        using QStyledItemDelegate::QStyledItemDelegate;
+
+    private:
+        void paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const override
+        {
+            painter->save();
+            QStyledItemDelegate::paint(painter, option, index); // paints background, focus rect and selection rect
+
+            const QStyle *style = option.widget ? option.widget->style() : QApplication::style();;
+            const QRect textRect = style->subElementRect(QStyle::SE_ItemViewItemText, &option, option.widget)
+                                   .adjusted(1, 0, 0, 0); // shift 1 to avoid text being too close to focus rect
+
+            QFont font = option.font;
+            if (option.font.pointSize() > 0)
+                font.setPointSize(option.font.pointSize()); // somehow this needs to be set directly otherwise painter will use default font
+            painter->setFont(font);
+
+            const QPen originalPen = painter->pen();
+            QPen coloredPen = originalPen;
+            coloredPen.setColor(Qt::darkGray);
+            painter->setPen(coloredPen);
+            const QString time = index.data(BaseLogModel::TimeRole).toString();
+            style->drawItemText(painter, textRect, option.displayAlignment, option.palette, (option.state & QStyle::State_Enabled), time);
+
+            painter->setPen(originalPen);
+            const QFontMetrics fontMetrics = painter->fontMetrics(); // option.fontMetrics adds extra padding to QFontMetrics::width
+            const int separatorCoordinateX = horizontalAdvance(fontMetrics, time);
+            style->drawItemText(painter, textRect.adjusted(separatorCoordinateX, 0, 0, 0), option.displayAlignment, option.palette
+                                , (option.state & QStyle::State_Enabled), SEPARATOR);
+
+            coloredPen.setColor(index.data(BaseLogModel::ForegroundRole).value<QColor>());
+            painter->setPen(coloredPen);
+            const int messageCoordinateX = separatorCoordinateX + horizontalAdvance(fontMetrics, SEPARATOR);
+            style->drawItemText(painter, textRect.adjusted(messageCoordinateX, 0, 0, 0), option.displayAlignment, option.palette
+                                , (option.state & QStyle::State_Enabled), index.data(BaseLogModel::MessageRole).toString());
+            painter->restore();
+        }
+
+        QSize sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const override
+        {
+            const QSize minimumFontPadding(4, 4);
+            const QSize fontSize = option.fontMetrics.size(0, logText(index)) + minimumFontPadding;
+            const QSize defaultSize = QStyledItemDelegate::sizeHint(option, index);
+            const QSize margins = (defaultSize - fontSize).expandedTo({0, 0});
+            return fontSize + margins;
+        }
+    };
+}
+
+LogListView::LogListView(QWidget *parent)
+    : QListView(parent)
+{
+    setSelectionMode(QAbstractItemView::ExtendedSelection);
+    setItemDelegate(new LogItemDelegate(this));
+
+#if defined(Q_OS_MAC)
+    setAttribute(Qt::WA_MacShowFocusRect, false);
+#endif
+}
+
+void LogListView::keyPressEvent(QKeyEvent *event)
+{
+    if (event->matches(QKeySequence::Copy))
+        copySelection();
+    else
+        QListView::keyPressEvent(event);
+}
+
+void LogListView::copySelection() const
+{
+    QStringList list;
+    const QModelIndexList selectedIndexes = selectionModel()->selectedRows();
+    for (const QModelIndex &index : selectedIndexes)
+        list.append(logText(index));
+    QApplication::clipboard()->setText(list.join('\n'));
+}

src/gui/log/loglistview.h

@@ -1,6 +1,7 @@
 /*
  * Bittorrent Client using Qt and libtorrent.
- * Copyright (C) 2011  Christophe Dumez <chris@qbittorrent.org>
+ * Copyright (C) 2020  Prince Gupta <jagannatharjun11@gmail.com>
+ * Copyright (C) 2019  sledgehammer999 <hammered999@gmail.com>
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
@@ -26,35 +27,21 @@
  * exception statement from your version.
  */
 
-#ifndef LOGLISTWIDGET_H
+#pragma once
-#define LOGLISTWIDGET_H
 
-#include <QListWidget>
+#include <QListView>
-#include "base/logger.h"
 
-class QKeyEvent;
+class LogListView final : public QListView
-
-class LogListWidget : public QListWidget
 {
     Q_OBJECT
+    Q_DISABLE_COPY(LogListView)
 
 public:
-    // -1 is the portable way to have all the bits set
+    explicit LogListView(QWidget *parent = nullptr);
-    explicit LogListWidget(int maxLines, const Log::MsgTypes &types = Log::ALL, QWidget *parent = nullptr);
-    void showMsgTypes(const Log::MsgTypes &types);
 
 public slots:
-    void appendLine(const QString &line, const Log::MsgType &type);
+    void copySelection() const;
-
-protected slots:
-    void copySelection();
-
-protected:
-    void keyPressEvent(QKeyEvent *event) override;
 
 private:
-    const int m_maxLines;
+    void keyPressEvent(QKeyEvent *event) override;
-    Log::MsgTypes m_types;
 };
-
-#endif // LOGLISTWIDGET_H

src/gui/log/logmodel.cpp

@@ -0,0 +1,188 @@
+/*
+ * Bittorrent Client using Qt and libtorrent.
+ * Copyright (C) 2020  Prince Gupta <jagannatharjun11@gmail.com>
+ * Copyright (C) 2019  sledgehammer999 <hammered999@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ * In addition, as a special exception, the copyright holders give permission to
+ * link this program with the OpenSSL project's "OpenSSL" library (or with
+ * modified versions of it that use the same license as the "OpenSSL" library),
+ * and distribute the linked executables. You must obey the GNU General Public
+ * License in all respects for all of the code used other than "OpenSSL".  If you
+ * modify file(s), you may extend this exception to your version of the file(s),
+ * but you are not obligated to do so. If you do not wish to do so, delete this
+ * exception statement from your version.
+ */
+
+#include "logmodel.h"
+
+#include <QApplication>
+#include <QDateTime>
+#include <QColor>
+#include <QPalette>
+
+#include "base/global.h"
+
+namespace
+{
+    const int MAX_VISIBLE_MESSAGES = 20000;
+}
+
+BaseLogModel::Message::Message(const QString &time, const QString &message, const QColor &foreground, const Log::MsgType type)
+    : m_time(time)
+    , m_message(message)
+    , m_foreground(foreground)
+    , m_type(type)
+{
+}
+
+QVariant BaseLogModel::Message::time() const
+{
+    return m_time;
+}
+
+QVariant BaseLogModel::Message::message() const
+{
+    return m_message;
+}
+
+QVariant BaseLogModel::Message::foreground() const
+{
+    return m_foreground;
+}
+
+QVariant BaseLogModel::Message::type() const
+{
+    return m_type;
+}
+
+BaseLogModel::BaseLogModel(QObject *parent)
+    : QAbstractListModel(parent)
+    , m_messages(MAX_VISIBLE_MESSAGES)
+{
+}
+
+int BaseLogModel::rowCount(const QModelIndex &) const
+{
+    return m_messages.size();
+}
+
+int BaseLogModel::columnCount(const QModelIndex &) const
+{
+    return 1;
+}
+
+QVariant BaseLogModel::data(const QModelIndex &index, const int role) const
+{
+    if (!index.isValid())
+        return {};
+
+    const int messageIndex = index.row();
+    if ((messageIndex < 0) || (messageIndex >= static_cast<int>(m_messages.size())))
+        return {};
+
+    const Message &message = m_messages[messageIndex];
+    switch (role) {
+    case TimeRole:
+        return message.time();
+    case MessageRole:
+        return message.message();
+    case ForegroundRole:
+        return message.foreground();
+    case TypeRole:
+        return message.type();
+    default:
+        return {};
+    }
+}
+
+void BaseLogModel::addNewMessage(const BaseLogModel::Message &message)
+{
+    // if row is inserted on filled up buffer, the size will not change
+    // but because of calling of beginInsertRows function we'll have ghost rows.
+    if (m_messages.size() == MAX_VISIBLE_MESSAGES) {
+        const int lastMessage = m_messages.size() - 1;
+        beginRemoveRows(QModelIndex(), lastMessage, lastMessage);
+        m_messages.pop_back();
+        endRemoveRows();
+    }
+
+    beginInsertRows(QModelIndex(), 0, 0);
+    m_messages.push_front(message);
+    endInsertRows();
+}
+
+void BaseLogModel::reset()
+{
+    beginResetModel();
+    m_messages.clear();
+    endResetModel();
+}
+
+LogMessageModel::LogMessageModel(QObject *parent)
+    : BaseLogModel(parent)
+{
+    for (const Log::Msg &msg : asConst(Logger::instance()->getMessages()))
+        handleNewMessage(msg);
+    connect(Logger::instance(), &Logger::newLogMessage, this, &LogMessageModel::handleNewMessage);
+}
+
+void LogMessageModel::handleNewMessage(const Log::Msg &message)
+{
+    const QString time = QDateTime::fromMSecsSinceEpoch(message.timestamp).toString(Qt::SystemLocaleShortDate);
+    const QString messageText = message.message;
+
+    QColor foreground;
+    switch (message.type) {
+    // The RGB QColor constructor is used for performance
+    case Log::NORMAL:
+        foreground = QApplication::palette().color(QPalette::WindowText);
+        break;
+    case Log::INFO:
+        foreground = QColor(0, 0, 255); // blue
+        break;
+    case Log::WARNING:
+        foreground = QColor(255, 165, 0);  // orange
+        break;
+    case Log::CRITICAL:
+        foreground = QColor(255, 0, 0);  // red
+        break;
+    default:
+        Q_ASSERT(false);
+        break;
+    }
+
+    addNewMessage({time, messageText, foreground, message.type});
+}
+
+LogPeerModel::LogPeerModel(QObject *parent)
+    : BaseLogModel(parent)
+{
+    for (const Log::Peer &peer : asConst(Logger::instance()->getPeers()))
+        handleNewMessage(peer);
+    connect(Logger::instance(), &Logger::newLogPeer, this, &LogPeerModel::handleNewMessage);
+}
+
+void LogPeerModel::handleNewMessage(const Log::Peer &peer)
+{
+    const QString time = QDateTime::fromMSecsSinceEpoch(peer.timestamp).toString(Qt::SystemLocaleShortDate);
+    const QString message = peer.blocked
+            ? tr("%1 was blocked due to %2", "0.0.0.0 was blocked due to reason").arg(peer.ip, peer.reason)
+            : tr("%1 was banned", "0.0.0.0 was banned").arg(peer.ip);
+    const QColor foreground = Qt::red;
+
+    addNewMessage({time, message, foreground, Log::NORMAL});
+}

src/gui/log/logmodel.h

@@ -0,0 +1,104 @@
+/*
+ * Bittorrent Client using Qt and libtorrent.
+ * Copyright (C) 2020  Prince Gupta <jagannatharjun11@gmail.com>
+ * Copyright (C) 2019  sledgehammer999 <hammered999@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ * In addition, as a special exception, the copyright holders give permission to
+ * link this program with the OpenSSL project's "OpenSSL" library (or with
+ * modified versions of it that use the same license as the "OpenSSL" library),
+ * and distribute the linked executables. You must obey the GNU General Public
+ * License in all respects for all of the code used other than "OpenSSL".  If you
+ * modify file(s), you may extend this exception to your version of the file(s),
+ * but you are not obligated to do so. If you do not wish to do so, delete this
+ * exception statement from your version.
+ */
+
+#pragma once
+
+#include <boost/circular_buffer.hpp>
+
+#include <QAbstractListModel>
+
+#include "base/logger.h"
+
+class BaseLogModel : public QAbstractListModel
+{
+    Q_DISABLE_COPY(BaseLogModel)
+
+public:
+    enum MessageTypeRole
+    {
+        TimeRole = Qt::UserRole,
+        MessageRole,
+        ForegroundRole,
+        TypeRole
+    };
+
+    explicit BaseLogModel(QObject *parent = nullptr);
+
+    int rowCount(const QModelIndex &parent = {}) const override;
+    int columnCount(const QModelIndex &parent = {}) const override;
+    QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;
+    void reset();
+
+protected:
+    class Message
+    {
+    public:
+        Message(const QString &time, const QString &message, const QColor &foreground, Log::MsgType type);
+
+        QVariant time() const;
+        QVariant message() const;
+        QVariant foreground() const;
+        QVariant type() const;
+
+    private:
+        QVariant m_time;
+        QVariant m_message;
+        QVariant m_foreground;
+        QVariant m_type;
+    };
+
+    void addNewMessage(const Message &message);
+
+private:
+    boost::circular_buffer_space_optimized<Message> m_messages;
+};
+
+class LogMessageModel : public BaseLogModel
+{
+    Q_OBJECT
+    Q_DISABLE_COPY(LogMessageModel)
+
+public:
+    explicit LogMessageModel(QObject *parent = nullptr);
+
+private slots:
+    void handleNewMessage(const Log::Msg &message);
+};
+
+class LogPeerModel : public BaseLogModel
+{
+    Q_OBJECT
+    Q_DISABLE_COPY(LogPeerModel)
+
+public:
+    explicit LogPeerModel(QObject *parent = nullptr);
+
+private slots:
+    void handleNewMessage(const Log::Peer &peer);
+};

src/gui/loglistwidget.cpp

@@ -1,108 +0,0 @@
-/*
- * Bittorrent Client using Qt and libtorrent.
- * Copyright (C) 2011  Christophe Dumez <chris@qbittorrent.org>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
- *
- * In addition, as a special exception, the copyright holders give permission to
- * link this program with the OpenSSL project's "OpenSSL" library (or with
- * modified versions of it that use the same license as the "OpenSSL" library),
- * and distribute the linked executables. You must obey the GNU General Public
- * License in all respects for all of the code used other than "OpenSSL".  If you
- * modify file(s), you may extend this exception to your version of the file(s),
- * but you are not obligated to do so. If you do not wish to do so, delete this
- * exception statement from your version.
- */
-
-#include "loglistwidget.h"
-
-#include <QAction>
-#include <QApplication>
-#include <QClipboard>
-#include <QKeyEvent>
-#include <QLabel>
-#include <QListWidgetItem>
-#include <QRegularExpression>
-
-#include "base/global.h"
-#include "uithememanager.h"
-
-LogListWidget::LogListWidget(const int maxLines, const Log::MsgTypes &types, QWidget *parent)
-    : QListWidget(parent)
-    , m_maxLines(maxLines)
-    , m_types(types)
-{
-    // Allow multiple selections
-    setSelectionMode(QAbstractItemView::ExtendedSelection);
-    // Context menu
-    auto *copyAct = new QAction(UIThemeManager::instance()->getIcon("edit-copy"), tr("Copy"), this);
-    auto *clearAct = new QAction(UIThemeManager::instance()->getIcon("edit-clear"), tr("Clear"), this);
-    connect(copyAct, &QAction::triggered, this, &LogListWidget::copySelection);
-    connect(clearAct, &QAction::triggered, this, &LogListWidget::clear);
-    addAction(copyAct);
-    addAction(clearAct);
-    setContextMenuPolicy(Qt::ActionsContextMenu);
-}
-
-void LogListWidget::showMsgTypes(const Log::MsgTypes &types)
-{
-    m_types = types;
-    for (int i = 0; i < count(); ++i) {
-        QListWidgetItem *tempItem = item(i);
-        if (!tempItem) continue;
-
-        Log::MsgType itemType = static_cast<Log::MsgType>(tempItem->data(Qt::UserRole).toInt());
-        setRowHidden(i, !(m_types & itemType));
-    }
-}
-
-void LogListWidget::keyPressEvent(QKeyEvent *event)
-{
-    if (event->matches(QKeySequence::Copy))
-        copySelection();
-    else
-        QListWidget::keyPressEvent(event);
-}
-
-void LogListWidget::appendLine(const QString &line, const Log::MsgType &type)
-{
-    // We need to use QLabel here to support rich text
-    auto *lbl = new QLabel(line);
-    lbl->setTextFormat(Qt::RichText);
-    lbl->setContentsMargins(4, 2, 4, 2);
-
-    auto *item = new QListWidgetItem;
-    item->setSizeHint(lbl->sizeHint());
-    item->setData(Qt::UserRole, type);
-    insertItem(0, item);
-    setItemWidget(item, lbl);
-    setRowHidden(0, !(m_types & type));
-
-    const int nbLines = count();
-    // Limit log size
-    if (nbLines > m_maxLines)
-        delete takeItem(nbLines - 1);
-}
-
-void LogListWidget::copySelection()
-{
-    const QRegularExpression htmlTag("<[^>]+>");
-
-    QStringList strings;
-    for (QListWidgetItem *it : asConst(selectedItems()))
-        strings << static_cast<QLabel*>(itemWidget(it))->text().remove(htmlTag);
-
-    QApplication::clipboard()->setText(strings.join('\n'));
-}

src/gui/mainwindow.cpp

@@ -28,6 +28,8 @@
 
 #include "mainwindow.h"
 
+#include <chrono>
+
 #include <QCloseEvent>
 #include <QDebug>
 #include <QDesktopServices>
@@ -99,9 +101,6 @@
 #include "programupdater.h"
 #endif
 
-#define TIME_TRAY_BALLOON 5000
-#define PREVENT_SUSPEND_INTERVAL 60000
-
 namespace
 {
 #define SETTINGS_KEY(name) "GUI/" name
@@ -119,6 +118,11 @@ namespace
     // Misc
     const QString KEY_DOWNLOAD_TRACKER_FAVICON = QStringLiteral(SETTINGS_KEY("DownloadTrackerFavicon"));
 
+    const std::chrono::seconds PREVENT_SUSPEND_INTERVAL {60};
+#if !defined(Q_OS_MACOS)
+    const int TIME_TRAY_BALLOON = 5000;
+#endif
+
     // just a shortcut
     inline SettingsStorage *settings()
     {
@@ -487,7 +491,7 @@ int MainWindow::executionLogMsgTypes() const
 
 void MainWindow::setExecutionLogMsgTypes(const int value)
 {
-    m_executionLog->showMsgTypes(static_cast<Log::MsgTypes>(value));
+    m_executionLog->setMessageTypes(static_cast<Log::MsgTypes>(value));
     settings()->storeValue(KEY_EXECUTIONLOG_TYPES, value);
 }
 
@@ -776,8 +780,9 @@ void MainWindow::cleanup()
     if (m_systrayCreator)
         m_systrayCreator->stop();
 #endif
-    if (m_preventTimer)
+
-        m_preventTimer->stop();
+    m_preventTimer->stop();
+
 #if (defined(Q_OS_WIN) || defined(Q_OS_MACOS))
     m_programUpdateTimer->stop();
 #endif
@@ -1401,7 +1406,7 @@ void MainWindow::showStatusBar(bool show)
     }
 }
 
-void MainWindow::loadPreferences(bool configureSession)
+void MainWindow::loadPreferences(const bool configureSession)
 {
     Logger::instance()->addMessage(tr("Options were saved successfully."));
     const Preferences *const pref = Preferences::instance();
@@ -1451,8 +1456,11 @@ void MainWindow::loadPreferences(bool configureSession)
 
     showStatusBar(pref->isStatusbarDisplayed());
 
-    if ((pref->preventFromSuspendWhenDownloading() || pref->preventFromSuspendWhenSeeding()) && !m_preventTimer->isActive()) {
+    if (pref->preventFromSuspendWhenDownloading() || pref->preventFromSuspendWhenSeeding()) {
-        m_preventTimer->start(PREVENT_SUSPEND_INTERVAL);
+        if (!m_preventTimer->isActive()) {
+            updatePowerManagementState();
+            m_preventTimer->start(PREVENT_SUSPEND_INTERVAL);
+        }
     }
     else {
         m_preventTimer->stop();
@@ -1866,7 +1874,7 @@ void MainWindow::on_actionExecutionLogs_triggered(bool checked)
 {
     if (checked) {
         Q_ASSERT(!m_executionLog);
-        m_executionLog = new ExecutionLogWidget(m_tabs, static_cast<Log::MsgType>(executionLogMsgTypes()));
+        m_executionLog = new ExecutionLogWidget(static_cast<Log::MsgType>(executionLogMsgTypes()), m_tabs);
 #ifdef Q_OS_MACOS
         m_tabs->addTab(m_executionLog, tr("Execution Log"));
 #else

src/gui/mainwindow.h

@@ -72,7 +72,7 @@ namespace Ui
     class MainWindow;
 }
 
-class MainWindow : public QMainWindow
+class MainWindow final : public QMainWindow
 {
     Q_OBJECT
 

src/gui/optionsdialog.cpp

@@ -81,9 +81,76 @@ namespace
             ret.append(locale.toString(date.addDays(i), "dddd"));
         return ret;
     }
+
+    QString languageToLocalizedString(const QLocale &locale)
+    {
+        switch (locale.language()) {
+        case QLocale::Arabic: return QString::fromUtf8(C_LOCALE_ARABIC);
+        case QLocale::Armenian: return QString::fromUtf8(C_LOCALE_ARMENIAN);
+        case QLocale::Basque: return QString::fromUtf8(C_LOCALE_BASQUE);
+        case QLocale::Bulgarian: return QString::fromUtf8(C_LOCALE_BULGARIAN);
+        case QLocale::Byelorussian: return QString::fromUtf8(C_LOCALE_BYELORUSSIAN);
+        case QLocale::Catalan: return QString::fromUtf8(C_LOCALE_CATALAN);
+        case QLocale::Chinese:
+            switch (locale.country()) {
+            case QLocale::China: return QString::fromUtf8(C_LOCALE_CHINESE_SIMPLIFIED);
+            case QLocale::HongKong: return QString::fromUtf8(C_LOCALE_CHINESE_TRADITIONAL_HK);
+            default: return QString::fromUtf8(C_LOCALE_CHINESE_TRADITIONAL_TW);
+            }
+        case QLocale::Croatian: return QString::fromUtf8(C_LOCALE_CROATIAN);
+        case QLocale::Czech: return QString::fromUtf8(C_LOCALE_CZECH);
+        case QLocale::Danish: return QString::fromUtf8(C_LOCALE_DANISH);
+        case QLocale::Dutch: return QString::fromUtf8(C_LOCALE_DUTCH);
+        case QLocale::English:
+            switch (locale.country()) {
+            case QLocale::Australia: return QString::fromUtf8(C_LOCALE_ENGLISH_AUSTRALIA);
+            case QLocale::UnitedKingdom: return QString::fromUtf8(C_LOCALE_ENGLISH_UNITEDKINGDOM);
+            default: return QString::fromUtf8(C_LOCALE_ENGLISH);
+            }
+        case QLocale::Finnish: return QString::fromUtf8(C_LOCALE_FINNISH);
+        case QLocale::French: return QString::fromUtf8(C_LOCALE_FRENCH);
+        case QLocale::Galician: return QString::fromUtf8(C_LOCALE_GALICIAN);
+        case QLocale::Georgian: return QString::fromUtf8(C_LOCALE_GEORGIAN);
+        case QLocale::German: return QString::fromUtf8(C_LOCALE_GERMAN);
+        case QLocale::Greek: return QString::fromUtf8(C_LOCALE_GREEK);
+        case QLocale::Hebrew: return QString::fromUtf8(C_LOCALE_HEBREW);
+        case QLocale::Hindi: return QString::fromUtf8(C_LOCALE_HINDI);
+        case QLocale::Hungarian: return QString::fromUtf8(C_LOCALE_HUNGARIAN);
+        case QLocale::Icelandic: return QString::fromUtf8(C_LOCALE_ICELANDIC);
+        case QLocale::Indonesian: return QString::fromUtf8(C_LOCALE_INDONESIAN);
+        case QLocale::Italian: return QString::fromUtf8(C_LOCALE_ITALIAN);
+        case QLocale::Japanese: return QString::fromUtf8(C_LOCALE_JAPANESE);
+        case QLocale::Korean: return QString::fromUtf8(C_LOCALE_KOREAN);
+        case QLocale::Latvian: return QString::fromUtf8(C_LOCALE_LATVIAN);
+        case QLocale::Lithuanian: return QString::fromUtf8(C_LOCALE_LITHUANIAN);
+        case QLocale::Malay: return QString::fromUtf8(C_LOCALE_MALAY);
+        case QLocale::Norwegian: return QString::fromUtf8(C_LOCALE_NORWEGIAN);
+        case QLocale::Occitan: return QString::fromUtf8(C_LOCALE_OCCITAN);
+        case QLocale::Polish: return QString::fromUtf8(C_LOCALE_POLISH);
+        case QLocale::Portuguese:
+            if (locale.country() == QLocale::Brazil)
+                return QString::fromUtf8(C_LOCALE_PORTUGUESE_BRAZIL);
+            return QString::fromUtf8(C_LOCALE_PORTUGUESE);
+        case QLocale::Romanian: return QString::fromUtf8(C_LOCALE_ROMANIAN);
+        case QLocale::Russian: return QString::fromUtf8(C_LOCALE_RUSSIAN);
+        case QLocale::Serbian: return QString::fromUtf8(C_LOCALE_SERBIAN);
+        case QLocale::Slovak: return QString::fromUtf8(C_LOCALE_SLOVAK);
+        case QLocale::Slovenian: return QString::fromUtf8(C_LOCALE_SLOVENIAN);
+        case QLocale::Spanish: return QString::fromUtf8(C_LOCALE_SPANISH);
+        case QLocale::Swedish: return QString::fromUtf8(C_LOCALE_SWEDISH);
+        case QLocale::Turkish: return QString::fromUtf8(C_LOCALE_TURKISH);
+        case QLocale::Ukrainian: return QString::fromUtf8(C_LOCALE_UKRAINIAN);
+        case QLocale::Uzbek: return QString::fromUtf8(C_LOCALE_UZBEK);
+        case QLocale::Vietnamese: return QString::fromUtf8(C_LOCALE_VIETNAMESE);
+        default:
+            const QString lang = QLocale::languageToString(locale.language());
+            qWarning() << "Unrecognized language name: " << lang;
+            return lang;
+        }
+    }
 }
 
-class WheelEventEater : public QObject
+class WheelEventEater final : public QObject
 {
 public:
     using QObject::QObject;
@@ -436,6 +503,8 @@ OptionsDialog::OptionsDialog(QWidget *parent)
     connect(m_ui->DNSPasswordTxt, &QLineEdit::textChanged, this, &ThisType::enableApplyButton);
     connect(m_ui->groupAltWebUI, &QGroupBox::toggled, this, &ThisType::enableApplyButton);
     connect(m_ui->textWebUIRootFolder, &FileSystemPathLineEdit::selectedPathChanged, this, &ThisType::enableApplyButton);
+    connect(m_ui->groupWebUIAddCustomHTTPHeaders, &QGroupBox::toggled, this, &ThisType::enableApplyButton);
+    connect(m_ui->textWebUICustomHTTPHeaders, &QPlainTextEdit::textChanged, this, &OptionsDialog::enableApplyButton);
 #endif // DISABLE_WEBUI
 
     // RSS tab
@@ -795,6 +864,9 @@ void OptionsDialog::saveOptions()
         // Alternative UI
         pref->setAltWebUiEnabled(m_ui->groupAltWebUI->isChecked());
         pref->setWebUiRootFolder(m_ui->textWebUIRootFolder->selectedPath());
+        // Custom HTTP headers
+        pref->setWebUICustomHTTPHeadersEnabled(m_ui->groupWebUIAddCustomHTTPHeaders->isChecked());
+        pref->setWebUICustomHTTPHeaders(m_ui->textWebUICustomHTTPHeaders->toPlainText());
     }
     // End Web UI
     // End preferences
@@ -815,7 +887,6 @@ Net::ProxyType OptionsDialog::getProxyType() const
     switch (m_ui->comboProxyType->currentIndex()) {
     case 1:
         return Net::ProxyType::SOCKS4;
-        break;
     case 2:
         if (isProxyAuthEnabled())
             return Net::ProxyType::SOCKS5_PW;
@@ -1176,6 +1247,9 @@ void OptionsDialog::loadOptions()
 
     m_ui->groupAltWebUI->setChecked(pref->isAltWebUiEnabled());
     m_ui->textWebUIRootFolder->setSelectedPath(pref->getWebUiRootFolder());
+    // Custom HTTP headers
+    m_ui->groupWebUIAddCustomHTTPHeaders->setChecked(pref->isWebUICustomHTTPHeadersEnabled());
+    m_ui->textWebUICustomHTTPHeaders->setPlainText(pref->getWebUICustomHTTPHeaders());
     // End Web UI preferences
 }
 
@@ -1376,28 +1450,27 @@ void OptionsDialog::toggleComboRatioLimitAct()
     m_ui->comboRatioLimitAct->setEnabled(m_ui->checkMaxRatio->isChecked() || m_ui->checkMaxSeedingMinutes->isChecked());
 }
 
-void OptionsDialog::enableProxy(int index)
+void OptionsDialog::enableProxy(const int index)
 {
-    if (index) {
+    if (index >= 1) { // Any proxy type is used
         //enable
         m_ui->lblProxyIP->setEnabled(true);
         m_ui->textProxyIP->setEnabled(true);
         m_ui->lblProxyPort->setEnabled(true);
         m_ui->spinProxyPort->setEnabled(true);
         m_ui->checkProxyPeerConnecs->setEnabled(true);
-        if (index > 1) {
+        if (index >= 2) { // SOCKS5 or HTTP
             m_ui->checkProxyAuth->setEnabled(true);
             m_ui->isProxyOnlyForTorrents->setEnabled(true);
         }
         else {
             m_ui->checkProxyAuth->setEnabled(false);
-            m_ui->checkProxyAuth->setChecked(false);
             m_ui->isProxyOnlyForTorrents->setEnabled(false);
             m_ui->isProxyOnlyForTorrents->setChecked(true);
         }
     }
-    else {
+    else { // No proxy
-        //disable
+        // disable
         m_ui->lblProxyIP->setEnabled(false);
         m_ui->textProxyIP->setEnabled(false);
         m_ui->lblProxyPort->setEnabled(false);
@@ -1405,7 +1478,6 @@ void OptionsDialog::enableProxy(int index)
         m_ui->checkProxyPeerConnecs->setEnabled(false);
         m_ui->isProxyOnlyForTorrents->setEnabled(false);
         m_ui->checkProxyAuth->setEnabled(false);
-        m_ui->checkProxyAuth->setChecked(false);
     }
 }
 
@@ -1698,81 +1770,6 @@ void OptionsDialog::handleIPFilterParsed(bool error, int ruleCount)
     disconnect(BitTorrent::Session::instance(), &BitTorrent::Session::IPFilterParsed, this, &OptionsDialog::handleIPFilterParsed);
 }
 
-QString OptionsDialog::languageToLocalizedString(const QLocale &locale)
-{
-    switch (locale.language()) {
-    case QLocale::English: {
-        if (locale.country() == QLocale::Australia)
-            return QString::fromUtf8(C_LOCALE_ENGLISH_AUSTRALIA);
-        if (locale.country() == QLocale::UnitedKingdom)
-            return QString::fromUtf8(C_LOCALE_ENGLISH_UNITEDKINGDOM);
-        return QString::fromUtf8(C_LOCALE_ENGLISH);
-    }
-    case QLocale::French: return QString::fromUtf8(C_LOCALE_FRENCH);
-    case QLocale::German: return QString::fromUtf8(C_LOCALE_GERMAN);
-    case QLocale::Hungarian: return QString::fromUtf8(C_LOCALE_HUNGARIAN);
-    case QLocale::Icelandic: return QString::fromUtf8(C_LOCALE_ICELANDIC);
-    case QLocale::Indonesian: return QString::fromUtf8(C_LOCALE_INDONESIAN);
-    case QLocale::Italian: return QString::fromUtf8(C_LOCALE_ITALIAN);
-    case QLocale::Dutch: return QString::fromUtf8(C_LOCALE_DUTCH);
-    case QLocale::Spanish: return QString::fromUtf8(C_LOCALE_SPANISH);
-    case QLocale::Catalan: return QString::fromUtf8(C_LOCALE_CATALAN);
-    case QLocale::Galician: return QString::fromUtf8(C_LOCALE_GALICIAN);
-    case QLocale::Occitan: return QString::fromUtf8(C_LOCALE_OCCITAN);
-    case QLocale::Portuguese: {
-        if (locale.country() == QLocale::Brazil)
-            return QString::fromUtf8(C_LOCALE_PORTUGUESE_BRAZIL);
-        return QString::fromUtf8(C_LOCALE_PORTUGUESE);
-    }
-    case QLocale::Polish: return QString::fromUtf8(C_LOCALE_POLISH);
-    case QLocale::Latvian: return QString::fromUtf8(C_LOCALE_LATVIAN);
-    case QLocale::Lithuanian: return QString::fromUtf8(C_LOCALE_LITHUANIAN);
-    case QLocale::Malay: return QString::fromUtf8(C_LOCALE_MALAY);
-    case QLocale::Czech: return QString::fromUtf8(C_LOCALE_CZECH);
-    case QLocale::Slovak: return QString::fromUtf8(C_LOCALE_SLOVAK);
-    case QLocale::Slovenian: return QString::fromUtf8(C_LOCALE_SLOVENIAN);
-    case QLocale::Serbian: return QString::fromUtf8(C_LOCALE_SERBIAN);
-    case QLocale::Croatian: return QString::fromUtf8(C_LOCALE_CROATIAN);
-    case QLocale::Armenian: return QString::fromUtf8(C_LOCALE_ARMENIAN);
-    case QLocale::Romanian: return QString::fromUtf8(C_LOCALE_ROMANIAN);
-    case QLocale::Turkish: return QString::fromUtf8(C_LOCALE_TURKISH);
-    case QLocale::Greek: return QString::fromUtf8(C_LOCALE_GREEK);
-    case QLocale::Swedish: return QString::fromUtf8(C_LOCALE_SWEDISH);
-    case QLocale::Finnish: return QString::fromUtf8(C_LOCALE_FINNISH);
-    case QLocale::Norwegian: return QString::fromUtf8(C_LOCALE_NORWEGIAN);
-    case QLocale::Danish: return QString::fromUtf8(C_LOCALE_DANISH);
-    case QLocale::Bulgarian: return QString::fromUtf8(C_LOCALE_BULGARIAN);
-    case QLocale::Ukrainian: return QString::fromUtf8(C_LOCALE_UKRAINIAN);
-    case QLocale::Uzbek: return QString::fromUtf8(C_LOCALE_UZBEK);
-    case QLocale::Russian: return QString::fromUtf8(C_LOCALE_RUSSIAN);
-    case QLocale::Japanese: return QString::fromUtf8(C_LOCALE_JAPANESE);
-    case QLocale::Hebrew: return QString::fromUtf8(C_LOCALE_HEBREW);
-    case QLocale::Hindi: return QString::fromUtf8(C_LOCALE_HINDI);
-    case QLocale::Arabic: return QString::fromUtf8(C_LOCALE_ARABIC);
-    case QLocale::Georgian: return QString::fromUtf8(C_LOCALE_GEORGIAN);
-    case QLocale::Byelorussian: return QString::fromUtf8(C_LOCALE_BYELORUSSIAN);
-    case QLocale::Basque: return QString::fromUtf8(C_LOCALE_BASQUE);
-    case QLocale::Vietnamese: return QString::fromUtf8(C_LOCALE_VIETNAMESE);
-    case QLocale::Chinese: {
-        switch (locale.country()) {
-        case QLocale::China:
-            return QString::fromUtf8(C_LOCALE_CHINESE_SIMPLIFIED);
-        case QLocale::HongKong:
-            return QString::fromUtf8(C_LOCALE_CHINESE_TRADITIONAL_HK);
-        default:
-            return QString::fromUtf8(C_LOCALE_CHINESE_TRADITIONAL_TW);
-        }
-    }
-    case QLocale::Korean: return QString::fromUtf8(C_LOCALE_KOREAN);
-    default: {
-        // Fallback to English
-        const QString engLang = QLocale::languageToString(locale.language());
-        qWarning() << "Unrecognized language name: " << engLang;
-        return engLang;
-    }
-    }
-}
-
 bool OptionsDialog::schedTimesOk()
 {
     if (m_ui->timeEditScheduleFrom->time() == m_ui->timeEditScheduleTo->time()) {

src/gui/optionsdialog.h

@@ -56,7 +56,7 @@ namespace Ui
     class OptionsDialog;
 }
 
-class OptionsDialog : public QDialog
+class OptionsDialog final : public QDialog
 {
     Q_OBJECT
     using ThisType = OptionsDialog;
@@ -82,7 +82,7 @@ class OptionsDialog : public QDialog
 public:
     // Constructor / Destructor
     OptionsDialog(QWidget *parent = nullptr);
-    ~OptionsDialog();
+    ~OptionsDialog() override;
 
 public slots:
     void showConnectionTab();
@@ -117,7 +117,6 @@ private:
     void saveOptions();
     void loadOptions();
     void initializeLanguageCombo();
-    static QString languageToLocalizedString(const QLocale &locale);
     // General options
     QString getLocale() const;
 #ifndef Q_OS_MACOS

src/gui/optionsdialog.ui

@@ -446,7 +446,7 @@
                   <item>
                    <widget class="QCheckBox" name="checkCloseToSystray">
                     <property name="toolTip">
-                      <string>The systray icon will still be visible when closing the main window</string>
+                     <string>The systray icon will still be visible when closing the main window</string>
                     </property>
                     <property name="text">
                      <string extracomment="The systray icon will still be visible when closing the main window">Close qBittorrent to notification area</string>
@@ -471,12 +471,12 @@
                       </item>
                       <item>
                        <property name="text">
-                        <string>Monochrome (Dark theme)</string>
+                        <string>Monochrome (for dark theme)</string>
                        </property>
                       </item>
                       <item>
                        <property name="text">
-                        <string>Monochrome (Light theme)</string>
+                        <string>Monochrome (for light theme)</string>
                        </property>
                       </item>
                      </widget>
@@ -3220,6 +3220,28 @@ Use ';' to split multiple entries. Can use wildcard '*'.</string>
                  </layout>
                 </widget>
                </item>
+               <item>
+                <widget class="QGroupBox" name="groupWebUIAddCustomHTTPHeaders">
+                 <property name="title">
+                  <string>Add custom HTTP headers</string>
+                 </property>
+                 <property name="checkable">
+                  <bool>true</bool>
+                 </property>
+                 <layout class="QVBoxLayout" name="verticalLayout_8">
+                  <item>
+                   <widget class="QPlainTextEdit" name="textWebUICustomHTTPHeaders">
+                    <property name="lineWrapMode">
+                     <enum>QPlainTextEdit::NoWrap</enum>
+                    </property>
+                    <property name="placeholderText">
+                     <string>Header: value pairs, one per line</string>
+                    </property>
+                   </widget>
+                  </item>
+                 </layout>
+                </widget>
+               </item>
                <item>
                 <widget class="QGroupBox" name="checkDynDNS">
                  <property name="title">

src/gui/powermanagement/powermanagement.cpp

@@ -30,10 +30,6 @@
 
 #include <QtGlobal>
 
-#if (defined(Q_OS_UNIX) && !defined(Q_OS_MACOS)) && defined(QT_DBUS_LIB)
-#include "powermanagement_x11.h"
-#endif
-
 #ifdef Q_OS_MACOS
 #include <IOKit/pwr_mgt/IOPMLib.h>
 #endif
@@ -42,9 +38,12 @@
 #include <windows.h>
 #endif
 
+#if (defined(Q_OS_UNIX) && !defined(Q_OS_MACOS)) && defined(QT_DBUS_LIB)
+#include "powermanagement_x11.h"
+#endif
+
 PowerManagement::PowerManagement(QObject *parent)
     : QObject(parent)
-    , m_busy(false)
 {
 #if (defined(Q_OS_UNIX) && !defined(Q_OS_MACOS)) && defined(QT_DBUS_LIB)
     m_inhibitor = new PowerManagementInhibitor(this);
@@ -55,7 +54,7 @@ PowerManagement::~PowerManagement()
 {
 }
 
-void PowerManagement::setActivityState(bool busy)
+void PowerManagement::setActivityState(const bool busy)
 {
     if (busy)
         setBusy();

src/gui/powermanagement/powermanagement.h

@@ -52,11 +52,11 @@ public:
   void setActivityState(bool busy);
 
 private:
-  bool m_busy;
-
   void setBusy();
   void setIdle();
 
+  bool m_busy = false;
+
 #if (defined(Q_OS_UNIX) && !defined(Q_OS_MACOS)) && defined(QT_DBUS_LIB)
   PowerManagementInhibitor *m_inhibitor;
 #endif

src/gui/previewlistdelegate.h

@@ -31,7 +31,7 @@
 
 #include <QItemDelegate>
 
-class PreviewListDelegate : public QItemDelegate
+class PreviewListDelegate final : public QItemDelegate
 {
     Q_OBJECT
     Q_DISABLE_COPY(PreviewListDelegate)

src/gui/previewselectdialog.h

@@ -45,7 +45,7 @@ namespace Ui
 }
 class PreviewListDelegate;
 
-class PreviewSelectDialog : public QDialog
+class PreviewSelectDialog final : public QDialog
 {
     Q_OBJECT
 

src/gui/private/fspathedit_p.h

@@ -45,7 +45,7 @@ class QStringRef;
 
 namespace Private
 {
-    class FileSystemPathValidator : public QValidator
+    class FileSystemPathValidator final : public QValidator
     {
         Q_OBJECT
 
@@ -111,7 +111,7 @@ namespace Private
         virtual QWidget *widget() = 0;
     };
 
-    class FileLineEdit : public QLineEdit, public FileEditorWithCompletion
+    class FileLineEdit final : public QLineEdit, public FileEditorWithCompletion
     {
         Q_OBJECT
         Q_DISABLE_COPY(FileLineEdit)
@@ -141,7 +141,7 @@ namespace Private
         QAction *m_warningAction;
     };
 
-    class FileComboEdit : public QComboBox, public FileEditorWithCompletion
+    class FileComboEdit final : public QComboBox, public FileEditorWithCompletion
     {
         Q_OBJECT
 

src/gui/private/tristatewidget.h

@@ -32,7 +32,7 @@
 
 class QString;
 
-class TriStateWidget : public QWidget
+class TriStateWidget final : public QWidget
 {
     Q_OBJECT
     Q_DISABLE_COPY(TriStateWidget)

src/gui/properties/downloadedpiecesbar.h

@@ -36,7 +36,7 @@
 
 class QWidget;
 
-class DownloadedPiecesBar : public PiecesBar
+class DownloadedPiecesBar final : public PiecesBar
 {
     using base = PiecesBar;
     Q_OBJECT

src/gui/properties/peerlistsortmodel.h

@@ -31,7 +31,7 @@
 
 #include <QSortFilterProxyModel>
 
-class PeerListSortModel : public QSortFilterProxyModel
+class PeerListSortModel final : public QSortFilterProxyModel
 {
     Q_OBJECT
     Q_DISABLE_COPY(PeerListSortModel)

src/gui/properties/peerlistwidget.h

@@ -53,7 +53,7 @@ namespace Net
     class ReverseResolution;
 }
 
-class PeerListWidget : public QTreeView
+class PeerListWidget final : public QTreeView
 {
     Q_OBJECT
 

src/gui/properties/pieceavailabilitybar.h

@@ -31,7 +31,7 @@
 
 #include "piecesbar.h"
 
-class PieceAvailabilityBar : public PiecesBar
+class PieceAvailabilityBar final : public PiecesBar
 {
     using base = PiecesBar;
     Q_OBJECT

src/gui/properties/piecesbar.cpp

@@ -37,7 +37,9 @@
 #include <QTextStream>
 #include <QToolTip>
 
+#include "base/indexrange.h"
 #include "base/bittorrent/torrenthandle.h"
+#include "base/bittorrent/torrentinfo.h"
 #include "base/utils/misc.h"
 
 namespace

src/gui/properties/propertieswidget.cpp

@@ -43,6 +43,7 @@
 #include <QUrl>
 
 #include "base/bittorrent/downloadpriority.h"
+#include "base/bittorrent/infohash.h"
 #include "base/bittorrent/session.h"
 #include "base/bittorrent/torrenthandle.h"
 #include "base/preferences.h"

src/gui/properties/proplistdelegate.h

@@ -49,7 +49,7 @@ enum PropColumn
     AVAILABILITY
 };
 
-class PropListDelegate : public QItemDelegate
+class PropListDelegate final : public QItemDelegate
 {
     Q_OBJECT
 

src/gui/properties/speedplotview.h

@@ -38,7 +38,7 @@
 
 class QPen;
 
-class SpeedPlotView : public QGraphicsView
+class SpeedPlotView final : public QGraphicsView
 {
     Q_OBJECT
 

src/gui/properties/speedwidget.h

@@ -40,7 +40,7 @@ class QVBoxLayout;
 class PropertiesWidget;
 class SpeedPlotView;
 
-class ComboBoxMenuButton : public QComboBox
+class ComboBoxMenuButton final : public QComboBox
 {
     Q_OBJECT
 

src/gui/raisedmessagebox.h

@@ -31,7 +31,7 @@
 
 #include <QMessageBox>
 
-class RaisedMessageBox : public QMessageBox
+class RaisedMessageBox final : public QMessageBox
 {
   Q_OBJECT
 

src/gui/rss/feedlistwidget.h

@@ -41,7 +41,7 @@ namespace RSS
     class Item;
 }
 
-class FeedListWidget : public QTreeWidget
+class FeedListWidget final : public QTreeWidget
 {
     Q_OBJECT
 

src/gui/rss/htmlbrowser.h

@@ -36,7 +36,7 @@ class QNetworkAccessManager;
 class QNetworkDiskCache;
 class QNetworkReply;
 
-class HtmlBrowser : public QTextBrowser
+class HtmlBrowser final : public QTextBrowser
 {
     Q_OBJECT
 
@@ -44,7 +44,7 @@ public:
     explicit HtmlBrowser(QWidget* parent = nullptr);
     ~HtmlBrowser();
 
-    virtual QVariant loadResource(int type, const QUrl &name) override;
+    QVariant loadResource(int type, const QUrl &name) override;
 
 protected:
     QNetworkAccessManager *m_netManager;

src/gui/scanfoldersdelegate.h

@@ -39,7 +39,7 @@ class QTreeView;
 
 class PropertiesWidget;
 
-class ScanFoldersDelegate : public QItemDelegate
+class ScanFoldersDelegate final : public QItemDelegate
 {
     Q_OBJECT
 

src/gui/search/pluginselectdialog.h

@@ -48,7 +48,7 @@ namespace Ui
     class PluginSelectDialog;
 }
 
-class PluginSelectDialog : public QDialog
+class PluginSelectDialog final : public QDialog
 {
     Q_OBJECT
     Q_DISABLE_COPY(PluginSelectDialog)

src/gui/search/searchjobwidget.h

@@ -51,7 +51,7 @@ namespace Ui
     class SearchJobWidget;
 }
 
-class SearchJobWidget : public QWidget
+class SearchJobWidget final : public QWidget
 {
     Q_OBJECT
     Q_DISABLE_COPY(SearchJobWidget)

src/gui/search/searchlistdelegate.h

@@ -31,7 +31,7 @@
 
 #include <QItemDelegate>
 
-class SearchListDelegate : public QItemDelegate
+class SearchListDelegate final : public QItemDelegate
 {
     Q_OBJECT
 

src/gui/search/searchsortmodel.h

@@ -32,7 +32,7 @@
 #include <QSortFilterProxyModel>
 #include <QStringList>
 
-class SearchSortModel : public QSortFilterProxyModel
+class SearchSortModel final : public QSortFilterProxyModel
 {
     using base = QSortFilterProxyModel;
 

src/gui/shutdownconfirmdialog.h

@@ -39,7 +39,7 @@ namespace Ui
     class ShutdownConfirmDialog;
 }
 
-class ShutdownConfirmDialog : public QDialog
+class ShutdownConfirmDialog final : public QDialog
 {
     Q_OBJECT
 

src/gui/tagfiltermodel.h

@@ -42,7 +42,7 @@ namespace BitTorrent
     class TorrentHandle;
 }
 
-class TagFilterModel : public QAbstractListModel
+class TagFilterModel final : public QAbstractListModel
 {
     Q_OBJECT