use signals to decouple i-power and dbus-listener

4 files changed, 38 insertions, 102 deletions

diff --git a/src/dbus-listener.c b/src/dbus-listener.c
index 5539098..6a85fd4 100644
--- a/src/dbus-listener.c
+++ b/src/dbus-listener.c
@@ -22,7 +22,7 @@ License along with this library. If not, see
 */
 
 #include "dbus-listener.h"
-#include "indicator-power.h"
+#include "device.h"
 
 #define DBUS_SERVICE          "org.gnome.SettingsDaemon"
 #define DBUS_PATH             "/org/gnome/SettingsDaemon"
@@ -31,8 +31,6 @@ License along with this library. If not, see
 
 struct _IndicatorPowerDbusListenerPrivate
 {
-	IndicatorPower * ipower;
-
 	GCancellable * cancellable;
 	GDBusProxy * proxy;
 	guint watcher_id;
@@ -40,20 +38,19 @@ struct _IndicatorPowerDbusListenerPrivate
 
 #define INDICATOR_POWER_DBUS_LISTENER_GET_PRIVATE(o) (INDICATOR_POWER_DBUS_LISTENER(o)->priv)
 
-/* Properties */
-/* Enum for the properties so that they can be quickly found and looked up. */
+/* Signals */
 enum {
-	PROP_0,
-	PROP_INDICATOR
+	SIGNAL_DEVICES,
+	SIGNAL_LAST
 };
+static guint signals[SIGNAL_LAST] = { 0 };
+
 
 /* GObject stuff */
 static void indicator_power_dbus_listener_class_init (IndicatorPowerDbusListenerClass *klass);
 static void indicator_power_dbus_listener_init       (IndicatorPowerDbusListener *self);
 static void indicator_power_dbus_listener_dispose    (GObject *object);
 static void indicator_power_dbus_listener_finalize   (GObject *object);
-static void set_property (GObject*, guint prop_id, const GValue*, GParamSpec* );
-static void get_property (GObject*, guint prop_id,       GValue*, GParamSpec* );
 
 static void gsd_appeared_callback (GDBusConnection *connection, const gchar *name, const gchar *name_owner, gpointer user_data);
 
@@ -62,21 +59,21 @@ G_DEFINE_TYPE (IndicatorPowerDbusListener, indicator_power_dbus_listener, G_TYPE
 static void
 indicator_power_dbus_listener_class_init (IndicatorPowerDbusListenerClass *klass)
 {
-	GParamSpec * pspec;
 	GObjectClass *object_class = G_OBJECT_CLASS (klass);
 
 	g_type_class_add_private (klass, sizeof (IndicatorPowerDbusListenerPrivate));
 
+	/* methods */
 	object_class->dispose = indicator_power_dbus_listener_dispose;
 	object_class->finalize = indicator_power_dbus_listener_finalize;
-	object_class->set_property = set_property;
-	object_class->get_property = get_property;
-
-	pspec = g_param_spec_object (INDICATOR_POWER_DBUS_LISTENER_INDICATOR,
-                                     "indicator",
-                                     "The IndicatorPower to notify when power changes are received",
-                                     INDICATOR_POWER_TYPE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);
-	g_object_class_install_property (object_class, PROP_INDICATOR, pspec);
+
+	/* signals */
+	signals[SIGNAL_DEVICES] = g_signal_new (INDICATOR_POWER_DBUS_LISTENER_DEVICES_ENUMERATED,
+	                                        G_TYPE_FROM_CLASS(klass), 0,
+	                                        G_STRUCT_OFFSET (IndicatorPowerDbusListenerClass, devices_enumerated),
+	                                        NULL, NULL,
+	                                        g_cclosure_marshal_VOID__POINTER,
+	                                        G_TYPE_NONE, 1, G_TYPE_POINTER, G_TYPE_NONE);
 }
 
 /* Initialize an instance */
@@ -89,8 +86,6 @@ indicator_power_dbus_listener_init (IndicatorPowerDbusListener *self)
 	                                    INDICATOR_POWER_DBUS_LISTENER_TYPE,
 	                                    IndicatorPowerDbusListenerPrivate);
 
-	priv->ipower = NULL;
-
 	priv->cancellable = g_cancellable_new ();
 
 	priv->watcher_id = g_bus_watch_name (G_BUS_TYPE_SESSION,
@@ -105,20 +100,6 @@ indicator_power_dbus_listener_init (IndicatorPowerDbusListener *self)
 }
 
 static void
-set_indicator (IndicatorPowerDbusListener * self, GObject * ipower)
-{
-	IndicatorPowerDbusListenerPrivate * priv = self->priv;
-
-	if (priv->ipower != NULL)
-		g_object_remove_weak_pointer (G_OBJECT(priv->ipower), (gpointer*)&priv->ipower);
-
-	priv->ipower = INDICATOR_POWER(ipower);
-
-	if (priv->ipower != NULL)
-		g_object_add_weak_pointer (G_OBJECT(priv->ipower), (gpointer*)&priv->ipower);
-};
-
-static void
 indicator_power_dbus_listener_dispose (GObject *object)
 {
 	IndicatorPowerDbusListener * self = INDICATOR_POWER_DBUS_LISTENER(object);
@@ -127,8 +108,6 @@ indicator_power_dbus_listener_dispose (GObject *object)
 	g_clear_object (&priv->proxy);
 	g_clear_object (&priv->cancellable);
 
-	set_indicator (self, NULL);
-
 	G_OBJECT_CLASS (indicator_power_dbus_listener_parent_class)->dispose (object);
 }
 
@@ -143,47 +122,14 @@ indicator_power_dbus_listener_finalize (GObject *object)
 ***/
 
 static void
-get_property (GObject * o, guint  prop_id, GValue * value, GParamSpec * pspec)
-{
-        IndicatorPowerDbusListener * self = INDICATOR_POWER_DBUS_LISTENER(o);
-        IndicatorPowerDbusListenerPrivate * priv = self->priv;
-
-        switch (prop_id)
-	{
-		case PROP_INDICATOR:
-			g_value_set_object (value, priv->ipower);
-			break;
-	}
-}
-
-static void
-set_property (GObject * o, guint prop_id, const GValue * value, GParamSpec * pspec)
-{
-        IndicatorPowerDbusListener * self = INDICATOR_POWER_DBUS_LISTENER(o);
-
-        switch (prop_id)
-	{
-		case PROP_INDICATOR:
-			set_indicator (self, g_value_get_object(value));
-			break;
-	}
-}
-
-/***
-****
-***/
-
-static void
 get_devices_cb (GObject      * source_object,
                 GAsyncResult * res,
                 gpointer       user_data)
 {
 	GError *error;
-	int device_count = 0;
+	GSList * devices = NULL;
 	GVariant * devices_container;
-	IndicatorPowerDevice ** devices = NULL;
 	IndicatorPowerDbusListener * self = INDICATOR_POWER_DBUS_LISTENER (user_data);
-        IndicatorPowerDbusListenerPrivate * priv = self->priv;
 
 	/* build an array of IndicatorPowerDevices from the DBus response */
 	error = NULL;
@@ -197,26 +143,24 @@ get_devices_cb (GObject      * source_object,
 	{
 		gsize i;
 		GVariant * devices_variant = g_variant_get_child_value (devices_container, 0);
-		device_count = devices_variant ? g_variant_n_children (devices_variant) : 0;
-		devices = g_new0 (IndicatorPowerDevice*, device_count);
+		const int device_count = devices_variant ? g_variant_n_children (devices_variant) : 0;
 
 		for (i=0; i<device_count; i++)
 		{
 			GVariant * v = g_variant_get_child_value (devices_variant, i);
-			devices[i] = indicator_power_device_new_from_variant (v);
+			devices = g_slist_prepend (devices, indicator_power_device_new_from_variant (v));
 			g_variant_unref (v);
 		}
+		devices = g_slist_reverse (devices);
 
 		g_variant_unref (devices_variant);
 		g_variant_unref (devices_container);
 	}
 
-	if (priv->ipower != NULL)
-	{
-		indicator_power_set_devices (priv->ipower, devices, device_count);
-	}
+	g_signal_emit (self, signals[SIGNAL_DEVICES], (GQuark)0, devices);
 
-	g_free (devices);
+	g_slist_free_full (devices, g_object_unref);
+	
 }
 
 static void
diff --git a/src/dbus-listener.h b/src/dbus-listener.h
index 816ecc5..2dc0865 100644
--- a/src/dbus-listener.h
+++ b/src/dbus-listener.h
@@ -41,7 +41,8 @@ typedef struct _IndicatorPowerDbusListener IndicatorPowerDbusListener;
 typedef struct _IndicatorPowerDbusListenerClass IndicatorPowerDbusListenerClass;
 typedef struct _IndicatorPowerDbusListenerPrivate IndicatorPowerDbusListenerPrivate;
 
-#define INDICATOR_POWER_DBUS_LISTENER_INDICATOR  "indicator-power-dbus-listener-indicator"
+/* signals */
+#define INDICATOR_POWER_DBUS_LISTENER_DEVICES_ENUMERATED  "indicator-power-dbus-listener-devices-enumerated"
 
 /**
  * IndicatorPowerDbusListenerClass:
@@ -50,6 +51,8 @@ typedef struct _IndicatorPowerDbusListenerPrivate IndicatorPowerDbusListenerPriv
 struct _IndicatorPowerDbusListenerClass
 {
 	GObjectClass parent_class;
+
+	void (* devices_enumerated) (IndicatorPowerDbusListener*, GSList * devices);
 };
 
 /**
diff --git a/src/indicator-power.c b/src/indicator-power.c
index cf96619..6690f9b 100644
--- a/src/indicator-power.c
+++ b/src/indicator-power.c
@@ -116,9 +116,10 @@ indicator_power_init (IndicatorPower *self)
 
   priv->accessible_desc = NULL;
 
-  priv->dbus_listener = g_object_new (INDICATOR_POWER_DBUS_LISTENER_TYPE,
-                                      INDICATOR_POWER_DBUS_LISTENER_INDICATOR, self,
-                                      NULL);
+  priv->dbus_listener = g_object_new (INDICATOR_POWER_DBUS_LISTENER_TYPE, NULL);
+  g_signal_connect_swapped (priv->dbus_listener, INDICATOR_POWER_DBUS_LISTENER_DEVICES_ENUMERATED,
+                            G_CALLBACK(indicator_power_set_devices), self);
+
   priv->settings = g_settings_new ("com.canonical.indicator.power");
   g_signal_connect_swapped (priv->settings, "changed::" ICON_POLICY_KEY,
                             G_CALLBACK(update_visibility), self);
@@ -763,33 +764,22 @@ put_primary_device (IndicatorPower *self, IndicatorPowerDevice *device)
 }
 
 void
-indicator_power_set_devices (IndicatorPower         * self,
-                             IndicatorPowerDevice  ** devices,
-                             gsize                    device_count)
+indicator_power_set_devices (IndicatorPower * self, GSList * devices)
 {
-  gsize i;
-  GSList * new_devices;
   IndicatorPowerPrivate * priv;
 
-/* LCOV_EXCL_START */
+  /* LCOV_EXCL_START */
   g_return_if_fail (IS_INDICATOR_POWER(self));
-/* LCOV_EXCL_STOP */
+  /* LCOV_EXCL_STOP */
   priv = self->priv;
 
-  /* make a reff'ed list of the new devices */
-  new_devices = NULL;
-  for (i=0; i<device_count; ++i)
-    new_devices = g_slist_prepend (new_devices, g_object_ref(devices[i]));
-  new_devices = g_slist_reverse (new_devices);
-
-  /* clear out the old devices */
+  /* update our devices & primary device */
+  g_slist_foreach (devices, (GFunc)g_object_ref, NULL);
   dispose_devices (self);
-
-  /* add the new ones */
-  priv->devices = new_devices;
+  priv->devices = g_slist_copy (devices);
   priv->device = get_primary_device (priv->devices);
 
-  /* and update ourselves based on this new data */
+  /* and our menus/visibility from the new device list */
   if (priv->device != NULL)
       put_primary_device (self, priv->device);
   else
diff --git a/src/indicator-power.h b/src/indicator-power.h
index bd47535..69ed888 100644
--- a/src/indicator-power.h
+++ b/src/indicator-power.h
@@ -55,7 +55,6 @@ struct _IndicatorPower
 GType indicator_power_get_type (void) G_GNUC_CONST;
 
 void indicator_power_set_devices (IndicatorPower         * power,
-                                  IndicatorPowerDevice  ** devices,
-                                  gsize                    deviceCount);
+                                  GSList                 * devices);
 
 G_END_DECLS