Show free disk space in status bar

PR #22407.
Closes #19607.

src/base/CMakeLists.txt

@@ -54,6 +54,7 @@ add_library(qbt_base STATIC
     concepts/stringable.h
     digest32.h
     exceptions.h
+    freediskspacechecker.h
     global.h
     http/connection.h
     http/httperror.h
@@ -159,6 +160,7 @@ add_library(qbt_base STATIC
     bittorrent/trackerentry.cpp
     bittorrent/trackerentrystatus.cpp
     exceptions.cpp
+    freediskspacechecker.cpp
     http/connection.cpp
     http/httperror.cpp
     http/requestparser.cpp

src/base/bittorrent/session.h

@@ -1,6 +1,6 @@
 /*
  * Bittorrent Client using Qt and libtorrent.
- * Copyright (C) 2015-2024  Vladimir Golovnev <glassez@yandex.ru>
+ * Copyright (C) 2015-2025  Vladimir Golovnev <glassez@yandex.ru>
  * Copyright (C) 2006  Christophe Dumez <chris@qbittorrent.org>
  *
  * This program is free software; you can redistribute it and/or
@@ -479,6 +479,8 @@ namespace BitTorrent
         virtual QString lastExternalIPv4Address() const = 0;
         virtual QString lastExternalIPv6Address() const = 0;
 
+        virtual qint64 freeDiskSpace() const = 0;
+
     signals:
         void startupProgressUpdated(int progress);
         void addTorrentFailed(const InfoHash &infoHash, const QString &reason);
@@ -519,5 +521,6 @@ namespace BitTorrent
         void trackerSuccess(Torrent *torrent, const QString &tracker);
         void trackerWarning(Torrent *torrent, const QString &tracker);
         void trackerEntryStatusesUpdated(Torrent *torrent, const QHash<QString, TrackerEntryStatus> &updatedTrackers);
+        void freeDiskSpaceChecked(qint64 result);
     };
 }

src/base/bittorrent/sessionimpl.cpp

@@ -1,6 +1,6 @@
 /*
  * Bittorrent Client using Qt and libtorrent.
- * Copyright (C) 2015-2024  Vladimir Golovnev <glassez@yandex.ru>
+ * Copyright (C) 2015-2025  Vladimir Golovnev <glassez@yandex.ru>
  * Copyright (C) 2006  Christophe Dumez <chris@qbittorrent.org>
  *
  * This program is free software; you can redistribute it and/or
@@ -76,6 +76,7 @@
 #include <QUuid>
 
 #include "base/algorithm.h"
+#include "base/freediskspacechecker.h"
 #include "base/global.h"
 #include "base/logger.h"
 #include "base/net/downloadmanager.h"
@@ -115,6 +116,7 @@ using namespace BitTorrent;
 
 const Path CATEGORIES_FILE_NAME {u"categories.json"_s};
 const int MAX_PROCESSING_RESUMEDATA_COUNT = 50;
+const std::chrono::seconds FREEDISKSPACE_CHECK_TIMEOUT = 30s;
 
 namespace
 {
@@ -540,6 +542,8 @@ SessionImpl::SessionImpl(QObject *parent)
     , m_ioThread {new QThread}
     , m_asyncWorker {new QThreadPool(this)}
     , m_recentErroredTorrentsTimer {new QTimer(this)}
+    , m_freeDiskSpaceChecker {new FreeDiskSpaceChecker(savePath())}
+    , m_freeDiskSpaceCheckingTimer {new QTimer(this)}
 {
     // It is required to perform async access to libtorrent sequentially
     m_asyncWorker->setMaxThreadCount(1);
@@ -600,6 +604,18 @@ SessionImpl::SessionImpl(QObject *parent)
         , &Net::ProxyConfigurationManager::proxyConfigurationChanged
         , this, &SessionImpl::configureDeferred);
 
+    m_freeDiskSpaceChecker->moveToThread(m_ioThread.get());
+    connect(m_ioThread.get(), &QThread::finished, m_freeDiskSpaceChecker, &QObject::deleteLater);
+    m_freeDiskSpaceCheckingTimer->setInterval(FREEDISKSPACE_CHECK_TIMEOUT);
+    m_freeDiskSpaceCheckingTimer->setSingleShot(true);
+    connect(m_freeDiskSpaceCheckingTimer, &QTimer::timeout, m_freeDiskSpaceChecker, &FreeDiskSpaceChecker::check);
+    connect(m_freeDiskSpaceChecker, &FreeDiskSpaceChecker::checked, this, [this](const qint64 value)
+    {
+        m_freeDiskSpace = value;
+        m_freeDiskSpaceCheckingTimer->start();
+        emit freeDiskSpaceChecked(m_freeDiskSpace);
+    });
+
     m_fileSearcher = new FileSearcher;
     m_fileSearcher->moveToThread(m_ioThread.get());
     connect(m_ioThread.get(), &QThread::finished, m_fileSearcher, &QObject::deleteLater);
@@ -613,6 +629,8 @@ SessionImpl::SessionImpl(QObject *parent)
     m_ioThread->setObjectName("SessionImpl m_ioThread");
     m_ioThread->start();
 
+    QMetaObject::invokeMethod(m_freeDiskSpaceChecker, &FreeDiskSpaceChecker::check);
+
     initMetrics();
     loadStatistics();
 
@@ -3266,6 +3284,14 @@ void SessionImpl::setSavePath(const Path &path)
     m_savePath = newPath;
     for (TorrentImpl *const torrent : asConst(m_torrents))
         torrent->handleCategoryOptionsChanged();
+
+    m_freeDiskSpace = -1;
+    m_freeDiskSpaceCheckingTimer->stop();
+    QMetaObject::invokeMethod(m_freeDiskSpaceChecker, [checker = m_freeDiskSpaceChecker, pathToCheck = m_savePath]
+    {
+        checker->setPathToCheck(pathToCheck);
+        checker->check();
+    });
 }
 
 void SessionImpl::setDownloadPath(const Path &path)
@@ -5113,6 +5139,11 @@ QString SessionImpl::lastExternalIPv6Address() const
     return m_lastExternalIPv6Address;
 }
 
+qint64 SessionImpl::freeDiskSpace() const
+{
+    return m_freeDiskSpace;
+}
+
 bool SessionImpl::isListening() const
 {
     return m_nativeSessionExtension->isSessionListening();

src/base/bittorrent/sessionimpl.h

@@ -1,6 +1,6 @@
 /*
  * Bittorrent Client using Qt and libtorrent.
- * Copyright (C) 2015-2024  Vladimir Golovnev <glassez@yandex.ru>
+ * Copyright (C) 2015-2025  Vladimir Golovnev <glassez@yandex.ru>
  * Copyright (C) 2006  Christophe Dumez <chris@qbittorrent.org>
  *
  * This program is free software; you can redistribute it and/or
@@ -64,6 +64,7 @@ class QUrl;
 class BandwidthScheduler;
 class FileSearcher;
 class FilterParserThread;
+class FreeDiskSpaceChecker;
 class NativeSessionExtension;
 
 namespace BitTorrent
@@ -448,6 +449,8 @@ namespace BitTorrent
         QString lastExternalIPv4Address() const override;
         QString lastExternalIPv6Address() const override;
 
+        qint64 freeDiskSpace() const override;
+
         // Torrent interface
         void handleTorrentResumeDataRequested(const TorrentImpl *torrent);
         void handleTorrentShareLimitChanged(TorrentImpl *torrent);
@@ -850,6 +853,10 @@ namespace BitTorrent
 
         QList<TorrentImpl *> m_pendingFinishedTorrents;
 
+        FreeDiskSpaceChecker *m_freeDiskSpaceChecker = nullptr;
+        QTimer *m_freeDiskSpaceCheckingTimer = nullptr;
+        qint64 m_freeDiskSpace = -1;
+
         friend void Session::initInstance();
         friend void Session::freeInstance();
         friend Session *Session::instance();

src/base/freediskspacechecker.cpp

@@ -0,0 +1,52 @@
+/*
+ * Bittorrent Client using Qt and libtorrent.
+ * Copyright (C) 2023-2025  Vladimir Golovnev <glassez@yandex.ru>
+ * Copyright (C) 2018  Thomas Piccirello <thomas.piccirello@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 "freediskspacechecker.h"
+
+#include "base/utils/fs.h"
+
+FreeDiskSpaceChecker::FreeDiskSpaceChecker(const Path &pathToCheck)
+    : m_pathToCheck {pathToCheck}
+{
+}
+
+Path FreeDiskSpaceChecker::pathToCheck() const
+{
+    return m_pathToCheck;
+}
+
+void FreeDiskSpaceChecker::setPathToCheck(const Path &newPathToCheck)
+{
+    m_pathToCheck = newPathToCheck;
+}
+
+void FreeDiskSpaceChecker::check()
+{
+    emit checked(Utils::Fs::freeDiskSpaceOnPath(m_pathToCheck));
+}

src/base/freediskspacechecker.h

@@ -0,0 +1,55 @@
+/*
+ * Bittorrent Client using Qt and libtorrent.
+ * Copyright (C) 2023-2025  Vladimir Golovnev <glassez@yandex.ru>
+ * Copyright (C) 2018  Thomas Piccirello <thomas.piccirello@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 <QObject>
+
+#include "base/path.h"
+
+class FreeDiskSpaceChecker final : public QObject
+{
+    Q_OBJECT
+    Q_DISABLE_COPY_MOVE(FreeDiskSpaceChecker)
+
+public:
+    FreeDiskSpaceChecker(const Path &pathToCheck);
+
+    Path pathToCheck() const;
+    void setPathToCheck(const Path &newPathToCheck);
+
+public slots:
+    void check();
+
+signals:
+    void checked(qint64 freeSpaceSize);
+
+private:
+    Path m_pathToCheck;
+};

src/base/preferences.cpp

@@ -359,6 +359,19 @@ void Preferences::setStatusbarDisplayed(const bool displayed)
     setValue(u"Preferences/General/StatusbarDisplayed"_s, displayed);
 }
 
+bool Preferences::isStatusbarFreeDiskSpaceDisplayed() const
+{
+    return value(u"Preferences/General/StatusbarFreeDiskSpaceDisplayed"_s, false);
+}
+
+void Preferences::setStatusbarFreeDiskSpaceDisplayed(const bool displayed)
+{
+    if (displayed == isStatusbarFreeDiskSpaceDisplayed())
+        return;
+
+    setValue(u"Preferences/General/StatusbarFreeDiskSpaceDisplayed"_s, displayed);
+}
+
 bool Preferences::isStatusbarExternalIPDisplayed() const
 {
     return value(u"Preferences/General/StatusbarExternalIPDisplayed"_s, false);

src/base/preferences.h

@@ -119,6 +119,8 @@ public:
     void setHideZeroComboValues(int n);
     bool isStatusbarDisplayed() const;
     void setStatusbarDisplayed(bool displayed);
+    bool isStatusbarFreeDiskSpaceDisplayed() const;
+    void setStatusbarFreeDiskSpaceDisplayed(bool displayed);
     bool isStatusbarExternalIPDisplayed() const;
     void setStatusbarExternalIPDisplayed(bool displayed);
     bool isToolbarDisplayed() const;