Add systemd suspend support

CMakeLists.txt

@@ -47,10 +47,13 @@ option(WITH_BINARY_ATTICA "Enable support for downloading binary resolvers autom
 option(LEGACY_KDE_INTEGRATION "Install tomahawk.protocol file, deprecated since 4.6.0" OFF)
 option(WITH_KDE4 "Build with support for KDE specific stuff" ON)
 
+find_package(QtSystemd QUIET)
 CMAKE_DEPENDENT_OPTION(WITH_UPOWER "Build with support for UPower events" ON
        "UNIX;NOT APPLE" OFF)
 CMAKE_DEPENDENT_OPTION(WITH_GNOMESHORTCUTHANDLER "Build with shortcut handler for GNOME" ON
        "UNIX;NOT APPLE" OFF)
+CMAKE_DEPENDENT_OPTION(WITH_SYSTEMD "Build with support for systemd events" ON
+       "QtSystemd_FOUND" OFF)
 
 IF( CMAKE_SYSTEM_PROCESSOR MATCHES "arm" )
     message(STATUS "Build of breakpad library disabled on this platform.")

src/tomahawk/CMakeLists.linux.cmake

@@ -15,6 +15,10 @@ IF( WITH_GNOMESHORTCUTHANDLER )
     SET( tomahawkSources ${tomahawkSources} linux/GnomeShortcutHandler.cpp )
 ENDIF( WITH_GNOMESHORTCUTHANDLER )
 
+IF( WITH_SYSTEMD )
+    SET( tomahawkSources ${tomahawkSources} linux/SystemdHandler.cpp )
+ENDIF( WITH_SYSTEMD )
+
 INSTALL( FILES ${CMAKE_SOURCE_DIR}/data/icons/tomahawk-icon.svg RENAME tomahawk.svg  DESTINATION ${CMAKE_INSTALL_DATADIR}/icons/hicolor/scalable/apps )
 
 INSTALL( FILES ${CMAKE_SOURCE_DIR}/admin/unix/tomahawk.desktop DESTINATION ${CMAKE_INSTALL_DATADIR}/applications )

src/tomahawk/CMakeLists.txt

@@ -185,6 +185,7 @@ TARGET_LINK_LIBRARIES( tomahawk_bin
     ${ECHONEST_LIBRARIES}
     ${QJSON_LIBRARIES}
     ${TAGLIB_LIBRARIES}
+    ${QTSYSTEMD_LIBRARIES}
 )
 
 IF( APPLE )

src/tomahawk/Config.h.in

@@ -18,6 +18,7 @@
 #cmakedefine WITH_QtSparkle
 #cmakedefine WITH_UPOWER
 #cmakedefine WITH_GNOMESHORTCUTHANDLER
+#cmakedefine WITH_SYSTEMD
 
 #cmakedefine LIBLASTFM_FOUND
 #cmakedefine QCA2_FOUND

src/tomahawk/TomahawkApp.cpp

@@ -92,6 +92,10 @@
     #include "linux/GnomeShortcutHandler.h"
 #endif
 
+#ifdef WITH_SYSTEMD
+    #include "linux/SystemdHandler.h"
+#endif
+
 #ifndef ENABLE_HEADLESS
     #include <QMessageBox>
 #endif
@@ -568,6 +572,10 @@ TomahawkApp::initEnergyEventHandler()
     UPowerHandler* upower = new UPowerHandler( this );
     upower->registerHandler();
 #endif // WITH_UPOWER
+
+#ifdef WITH_SYSTEMD
+    new SystemdHandler( this );
+#endif // WITH_SYSTEMD
 }
 
 

src/tomahawk/linux/SystemdHandler.cpp

@@ -0,0 +1,66 @@
+/* === This file is part of Tomahawk Player - <http://tomahawk-player.org> ===
+ *
+ *   Copyright 2013, Uwe L. Korn <uwelk@xhochy.com>
+ *
+ *   Tomahawk 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 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   Tomahawk 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 Tomahawk. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "SystemdHandler.h"
+
+#include "accounts/AccountManager.h"
+#include "utils/Logger.h"
+
+#include <QTimer>
+#include <QtSystemd/ldmanager.h>
+
+#define SYSTEMD_RESUME_DELAY 2000
+
+namespace Tomahawk {
+
+SystemdHandler::SystemdHandler(QObject *parent) :
+    QObject(parent)
+{
+    connect( Systemd::Logind::notifier(), SIGNAL( prepareForSleep( bool ) ),
+             SLOT( handleSleep( bool ) ) );
+}
+
+
+void
+SystemdHandler::handleSleep( bool active )
+{
+    if ( active )
+    {
+        QMutexLocker locker( &m_mutex );
+        tLog( LOGVERBOSE ) << Q_FUNC_INFO << "About to sleep so disconnecting all accounts";
+        Tomahawk::Accounts::AccountManager::instance()->disconnectAll();
+    }
+    else
+    {
+        m_mutex.lock();
+        // Delay resuming for other wakeup actions, e.g. reconnecting to the network, to take place.
+        QTimer::singleShot( SYSTEMD_RESUME_DELAY, this, SLOT( actualResume() ) );
+    }
+
+}
+
+
+void
+SystemdHandler::actualResume()
+{
+    tLog( LOGVERBOSE ) << Q_FUNC_INFO << "Awake from sleep so connecting all accounts";
+    Tomahawk::Accounts::AccountManager::instance()->connectAll();
+    m_mutex.unlock();
+}
+
+} // namespace Tomahawk

src/tomahawk/linux/SystemdHandler.h

@@ -0,0 +1,44 @@
+/* === This file is part of Tomahawk Player - <http://tomahawk-player.org> ===
+ *
+ *   Copyright 2013, Uwe L. Korn <uwelk@xhochy.com>
+ *
+ *   Tomahawk 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 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   Tomahawk 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 Tomahawk. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef TOMAHAWK_SYSTEMDHANDLER_H
+#define TOMAHAWK_SYSTEMDHANDLER_H
+
+#include <QMutex>
+#include <QObject>
+
+namespace Tomahawk {
+
+class SystemdHandler : public QObject
+{
+    Q_OBJECT
+public:
+    explicit SystemdHandler(QObject *parent = 0);
+    
+private slots:
+    void handleSleep( bool active );
+    void actualResume();
+
+private:
+    QMutex m_mutex;
+    
+};
+
+} // namespace Tomahawk
+
+#endif // TOMAHAWK_SYSTEMDHANDLER_H