Add support for systemd power management

src/gui/powermanagement/powermanagement_x11.cpp

@@ -41,6 +41,13 @@ PowerManagementInhibitor::PowerManagementInhibitor(QObject *parent)
     , m_busInterface {new QDBusInterface(u"org.gnome.SessionManager"_s, u"/org/gnome/SessionManager"_s
         , u"org.gnome.SessionManager"_s, QDBusConnection::sessionBus(), this)}
 {
+    if (!m_busInterface->isValid())
+    {
+        delete m_busInterface;
+
+        m_busInterface = new QDBusInterface(u"org.freedesktop.login1"_s, u"/org/freedesktop/login1"_s
+            , u"org.freedesktop.login1.Manager"_s, QDBusConnection::systemBus(), this);
+        m_manager = ManagerType::Systemd;
         if (!m_busInterface->isValid())
         {
             delete m_busInterface;
@@ -52,14 +59,14 @@ PowerManagementInhibitor::PowerManagementInhibitor(QObject *parent)
             {
                 delete m_busInterface;
                 m_busInterface = nullptr;
-
-            m_state = Error;
+            }
         }
     }
 
     if (m_busInterface)
     {
         m_busInterface->setTimeout(1000);
+        m_state = Idle;
         LogMsg(tr("Power management found suitable D-Bus interface. Interface: %1").arg(m_busInterface->interface()));
     }
     else
@@ -77,6 +84,13 @@ void PowerManagementInhibitor::requestIdle()
     m_state = RequestIdle;
     qDebug("D-Bus: PowerManagementInhibitor: Requesting idle");
 
+    if (m_manager == ManagerType::Systemd)
+    {
+        QDBusUnixFileDescriptor dummy;
+        m_fd.swap(dummy);
+        return;
+    }
+
     const QString method = (m_manager == ManagerType::Gnome)
         ? u"Uninhibit"_s
         : u"UnInhibit"_s;
@@ -95,9 +109,21 @@ void PowerManagementInhibitor::requestBusy()
     qDebug("D-Bus: PowerManagementInhibitor: Requesting busy");
 
     const QString message = u"Active torrents are currently present"_s;
-    const auto args = (m_manager == ManagerType::Gnome)
-        ? QList<QVariant> {u"qBittorrent"_s, 0u, message, 4u}
-        : QList<QVariant> {u"qBittorrent"_s, message};
+
+    QList<QVariant> args;
+    switch (m_manager)
+    {
+    case ManagerType::Freedesktop:
+        args = {u"qBittorrent"_s, message};
+        break;
+    case ManagerType::Gnome:
+        args = {u"qBittorrent"_s, 0u, message, 4u};
+        break;
+    case ManagerType::Systemd:
+        args = {u"sleep"_s, u"qBittorrent"_s, message, u"block"_s};
+        break;
+    }
+
     const QDBusPendingCall pcall = m_busInterface->asyncCallWithArgumentList(u"Inhibit"_s, args);
     const auto *watcher = new QDBusPendingCallWatcher(pcall, this);
     connect(watcher, &QDBusPendingCallWatcher::finished, this, &PowerManagementInhibitor::onAsyncReply);
@@ -127,6 +153,28 @@ void PowerManagementInhibitor::onAsyncReply(QDBusPendingCallWatcher *call)
         }
     }
     else if (m_state == RequestBusy)
+    {
+        if (m_manager == ManagerType::Systemd)
+        {
+            const QDBusPendingReply<QDBusUnixFileDescriptor> reply = *call;
+
+            if (reply.isError())
+            {
+                qDebug("D-Bus: Reply: Error: %s", qUtf8Printable(reply.error().message()));
+                LogMsg(tr("Power management error. Action: %1. Error: %2").arg(u"RequestBusy"_s
+                    , reply.error().message()), Log::WARNING);
+                m_state = Error;
+            }
+            else
+            {
+                m_state = Busy;
+                m_fd = reply.value();
+                qDebug("D-Bus: PowerManagementInhibitor: Request successful, cookie is %d", m_cookie);
+                if (m_intendedState == Idle)
+                    requestIdle();
+            }
+        }
+        else
         {
             const QDBusPendingReply<quint32> reply = *call;
 
@@ -146,6 +194,7 @@ void PowerManagementInhibitor::onAsyncReply(QDBusPendingCallWatcher *call)
                     requestIdle();
             }
         }
+    }
     else
     {
         const QDBusPendingReply reply = *call;

src/gui/powermanagement/powermanagement_x11.h

@@ -28,6 +28,7 @@
 
 #pragma once
 
+#include <QDBusUnixFileDescriptor>
 #include <QObject>
 
 class QDBusInterface;
@@ -61,7 +62,8 @@ private:
     enum class ManagerType
     {
         Freedesktop,  // https://www.freedesktop.org/wiki/Specifications/power-management-spec/
-        Gnome  // https://github.com/GNOME/gnome-settings-daemon/blob/master/gnome-settings-daemon/org.gnome.SessionManager.xml
+        Gnome,  // https://github.com/GNOME/gnome-settings-daemon/blob/master/gnome-settings-daemon/org.gnome.SessionManager.xml
+        Systemd // https://www.freedesktop.org/software/systemd/man/org.freedesktop.login1.html
     };
 
     QDBusInterface *m_busInterface = nullptr;
@@ -70,4 +72,5 @@ private:
     enum State m_state = Error;
     enum State m_intendedState = Idle;
     quint32 m_cookie = 0;
+    QDBusUnixFileDescriptor m_fd;
 };