Fixed crash: OMG QDbusAdaptors can not be removed!

Added a fixme for future reference
reloadPlugins() now recycles plugins already present
Lots of debug messages and minor changes added trying to fix the bug

daemon/device.cpp

@@ -68,9 +68,9 @@ bool Device::hasPlugin(const QString& name)
 
 void Device::reloadPlugins()
 {
+    QMap< QString, KdeConnectPlugin* > newPluginMap;
 
-    qDeleteAll(m_plugins);
-    m_plugins.clear();
+    if (paired()) { //Do not load any plugin for unpaired devices
 
         QString path = KStandardDirs().resourceDirs("config").first()+"kdeconnect/";
         QMap<QString,QString> pluginStates = KSharedConfig::openConfig(path + id())->group("Plugins").entryMap();
@@ -84,20 +84,30 @@ void Device::reloadPlugins()
             KPluginInfo info = loader->getPluginInfo(pluginName);
             bool enabled = (value.isNull() ? info.isPluginEnabledByDefault() : QVariant(value).toBool());
 
-        qDebug() << pluginName << "enabled:" << enabled;
-
             if (enabled) {
+
+                if (m_plugins.contains(pluginName)) {
+                    //Already loaded, reuse it
+                    newPluginMap[pluginName] = m_plugins[pluginName];
+                    m_plugins.remove(pluginName);
+                } else {
                     KdeConnectPlugin* plugin = loader->instantiatePluginForDevice(pluginName, this);
 
                     connect(this, SIGNAL(receivedPackage(const NetworkPackage&)),
                             plugin, SLOT(receivePackage(const NetworkPackage&)));
-    //        connect(plugin, SIGNAL(sendPackage(const NetworkPackage&)),
-    //                device, SLOT(sendPackage(const NetworkPackage&)));
 
-
-            m_plugins[pluginName] = plugin;
+                    newPluginMap[pluginName] = plugin;
                 }
             }
+        }
+    }
+
+    //Erase all the plugins left in the original map (it means that we don't want
+    //them anymore, otherways they would have been moved to the newPluginMap)
+    qDeleteAll(m_plugins);
+    m_plugins.clear();
+
+    m_plugins = newPluginMap;
 
     Q_EMIT pluginsChanged();
 
@@ -106,7 +116,6 @@ void Device::reloadPlugins()
 
 void Device::setPair(bool b)
 {
-    qDebug() << "setPair" << b;
     m_paired = b;
     KSharedConfigPtr config = KSharedConfig::openConfig("kdeconnectrc");
     if (b) {
@@ -116,6 +125,7 @@ void Device::setPair(bool b)
         qDebug() << name() << "unpaired";
         config->group("devices").group("paired").deleteGroup(id());
     }
+    reloadPlugins();
 }
 
 static bool lessThan(DeviceLink* p1, DeviceLink* p2)

daemon/plugins/battery/batterydbusinterface.cpp

@@ -25,7 +25,11 @@
 BatteryDbusInterface::BatteryDbusInterface(QObject *parent)
     : QDBusAbstractAdaptor(parent)
 {
+}
 
+BatteryDbusInterface::~BatteryDbusInterface()
+{
+    qDebug() << "Destroying BatteryDbusInterface";
 }
 
 void BatteryDbusInterface::updateValues(bool isCharging, int currentCharge)

daemon/plugins/battery/batterydbusinterface.h

@@ -33,6 +33,7 @@ class BatteryDbusInterface
 
 public:
     explicit BatteryDbusInterface(QObject *parent);
+    virtual ~BatteryDbusInterface();
     
     int charge() { return mCharge; }
     bool isCharging() { return mIsCharging; }

daemon/plugins/battery/batteryplugin.cpp

@@ -32,6 +32,7 @@ K_EXPORT_PLUGIN( KdeConnectPluginFactory("kdeconnect_battery", "kdeconnect_batte
 BatteryPlugin::BatteryPlugin(QObject *parent, const QVariantList &args)
     : KdeConnectPlugin(parent, args)
 {
+
     batteryDbusInterface = new BatteryDbusInterface(parent);
     
     NetworkPackage np(PACKAGE_TYPE_BATTERY);
@@ -42,7 +43,14 @@ BatteryPlugin::BatteryPlugin(QObject *parent, const QVariantList &args)
 
 BatteryPlugin::~BatteryPlugin()
 {
-    batteryDbusInterface->deleteLater();
+    //FIXME: Qt dbus does not allow to remove an adaptor! (it causes a crash in
+    // the next access to device via dbus). The implication of not deleting this
+    // is that disabling the plugin does not remove the interface (that will
+    // return outdated values) and that enabling it again instantiates a second
+    // adaptor. This is a partial memory leak (the memory will be freed when the
+    // device is destroyed anyway)
+
+    //batteryDbusInterface->deleteLater();
 }
 
 bool BatteryPlugin::receivePackage(const NetworkPackage& np)

daemon/plugins/notifications/kdeconnect_notifications.desktop

@@ -12,4 +12,4 @@ X-KDE-PluginInfo-License=GPL
 X-KDE-PluginInfo-EnabledByDefault=true
 Icon=preferences-desktop-notification
 Name=Notification sync
-Comment=Show every notification in KDE and keep them in sync
+Comment=Show phone notifications in KDE and keep them in sync

daemon/plugins/pausemusic/kdeconnect_pausemusic.desktop

@@ -11,5 +11,5 @@ X-KDE-PluginInfo-Website=http://albertvaka.wordpress.com
 X-KDE-PluginInfo-License=GPL
 X-KDE-PluginInfo-EnabledByDefault=true
 Icon=speaker
-Name=Pause music on call
-Comment=Pause music during a phone call
+Name=Pause media during calls
+Comment=Pause music/videos during a phone call

daemon/plugins/ping/pingplugin.cpp

@@ -33,6 +33,11 @@ PingPlugin::PingPlugin(QObject* parent, const QVariantList& args)
     qDebug() << "Ping plugin constructor for device" << device()->name();
 }
 
+PingPlugin::~PingPlugin()
+{
+    qDebug() << "Ping plugin destructor for device" << device()->name();
+}
+
 bool PingPlugin::receivePackage(const NetworkPackage& np)
 {
 

daemon/plugins/ping/pingplugin.h

@@ -32,6 +32,7 @@ class KDE_EXPORT PingPlugin
 
 public:
     explicit PingPlugin(QObject *parent, const QVariantList &args);
+    virtual ~PingPlugin();
     
 public Q_SLOTS:
     virtual bool receivePackage(const NetworkPackage& np);

daemon/plugins/telephony/kdeconnect_telephony.desktop

@@ -12,4 +12,4 @@ X-KDE-PluginInfo-License=GPL
 X-KDE-PluginInfo-EnabledByDefault=true
 Icon=call-start
 Name=Telephony integration
-Comment=Currently it only shows notifications for calls and SMS
+Comment=Show notifications for calls and SMS (answering coming soon)