interface introspection underway@

5 files changed, 86 insertions, 23 deletions

diff --git a/src/Makefile.am b/src/Makefile.am
index 82830e1..57f52d4 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -81,7 +81,8 @@ music_bridge_VALAFLAGS = \
   --pkg common-defs \
 	--pkg gio-2.0 \
 	--pkg gio-unix-2.0 \
-	--pkg gdk-pixbuf-2.0 
+	--pkg gdk-pixbuf-2.0 \
+	--pkg libxml-2.0
 
 	 
  $(MAINTAINER_VALAFLAGS)
diff --git a/src/mpris2-controller.vala b/src/mpris2-controller.vala
index 5f98541..7b512a3 100644
--- a/src/mpris2-controller.vala
+++ b/src/mpris2-controller.vala
@@ -53,7 +53,6 @@ public class Mpris2Controller : GLib.Object
       this.playlists = Bus.get_proxy_sync ( BusType.SESSION,
                                             this.owner.dbus_name,
                                             "/org/mpris/MediaPlayer2" );
-      
       this.properties_interface = Bus.get_proxy_sync ( BusType.SESSION,
                                                        "org.freedesktop.Properties.PropertiesChanged",
                                                        "/org/mpris/MediaPlayer2" );
@@ -95,9 +94,8 @@ public class Mpris2Controller : GLib.Object
                                    metadata.populated(MetadataMenuitem.attributes_format()));
     }
     Variant? playlist_v = changed_properties.lookup("ActivePlaylist");
-    if ( playlist_v != null ){
+    if ( playlist_v != null && this.playlists_support_exist() ){
       this.fetch_active_playlist();
-      //Timeout.add ( 200, fetch_active_playlist );
     }
   }
 
@@ -154,8 +152,12 @@ public class Mpris2Controller : GLib.Object
     GLib.HashTable<string, Value?>? cleaned_metadata = this.clean_metadata();
     this.owner.custom_items[PlayerController.widget_order.METADATA].update(cleaned_metadata,
                                                                             MetadataMenuitem.attributes_format());
-    this.fetch_playlists();
-    this.fetch_active_playlist();    
+
+    /*if ( playlists_support_exist() == true ){
+      debug ("it thinks that there is a valid playlist interface");
+      this.fetch_playlists();
+      this.fetch_active_playlist();    
+    }*/
   }
 
   public void transport_update(TransportMenuitem.action command)
@@ -174,8 +176,6 @@ public class Mpris2Controller : GLib.Object
 
   public void fetch_playlists()
   {
-    if (this.playlists == null) return;
-
     PlaylistDetails[] current_playlists =  this.playlists.GetPlaylists(0,
                                                                        10,
                                                                        "Alphabetical",
@@ -189,9 +189,9 @@ public class Mpris2Controller : GLib.Object
   }
 
   private void fetch_active_playlist()
-  {
-    if (this.playlists == null && this.playlists.ActivePlaylist.valid == false){
-      warning("Playlists object is null or we don't have an active playlist");
+  {    
+    if (this.playlists.ActivePlaylist.valid == false){
+      debug("We don't have an active playlist");
     }
     PlaylistsMenuitem playlists_item = this.owner.custom_items[PlayerController.widget_order.PLAYLISTS] as PlaylistsMenuitem;
     playlists_item.update_active_playlist ( this.playlists.ActivePlaylist.details );
@@ -212,10 +212,10 @@ public class Mpris2Controller : GLib.Object
 
   public void activate_playlist (ObjectPath path)
   {
-    if(this.playlists == null){
-      warning("playlists mpris instance is null !");
-      return;       
+    if ( playlists_support_exist() == false ){
+      return;
     }
+
     try{
       this.playlists.ActivatePlaylist.begin(path);
     }
diff --git a/src/mpris2-watcher.vala b/src/mpris2-watcher.vala
index 7814975..f572ab7 100644
--- a/src/mpris2-watcher.vala
+++ b/src/mpris2-watcher.vala
@@ -17,6 +17,8 @@ You should have received a copy of the GNU General Public License along
 with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
+using Xml;
+
 [DBus (name = "org.freedesktop.DBus")]
 public interface FreeDesktopObject: Object {
   public abstract async string[] list_names() throws IOError;
@@ -25,6 +27,16 @@ public interface FreeDesktopObject: Object {
                                                    string new_owner );
 }
 
+[DBus (name = "org.freedesktop.DBus.Introspectable")]
+public interface FreeDesktopIntrospectable: Object {
+  public abstract string introspect() throws IOError;
+}
+
+public errordomain XmlError {
+    FILE_NOT_FOUND,
+    XML_DOCUMENT_EMPTY
+}
+
 public class Mpris2Watcher : GLib.Object
 {
   private const string FREEDESKTOP_SERVICE = "org.freedesktop.DBus";
@@ -33,14 +45,14 @@ public class Mpris2Watcher : GLib.Object
   private const string MPRIS_MEDIA_PLAYER_PATH = "/org/mpris/MediaPlayer2";
 
   FreeDesktopObject fdesktop_obj;
-  
+
   public signal void client_appeared ( string desktop_file_name, string dbus_name );
   public signal void client_disappeared ( string dbus_name );
 
   public Mpris2Watcher ()
   {
   }
-  
+
   construct
   {  
     try {
@@ -76,21 +88,69 @@ public class Mpris2Watcher : GLib.Object
     }
   }
 
-  private MprisRoot? create_mpris_root(string name){
+  private MprisRoot? create_mpris_root ( string name ){
     MprisRoot mpris2_root = null;
     if ( name.has_prefix (MPRIS_PREFIX) ){
       try {
         mpris2_root = Bus.get_proxy_sync (  BusType.SESSION,
-                                             name,
-                                             MPRIS_MEDIA_PLAYER_PATH );
+                                            name,
+                                            MPRIS_MEDIA_PLAYER_PATH );
       }
       catch (IOError e){
         warning( "Mpris2watcher could not create a root interface: %s",
                   e.message );
       }
     }
+    this.supports_playlists(name);
     return mpris2_root;
   }
+
+  private bool supports_playlists ( string name )
+  {
+    FreeDesktopIntrospectable introspectable;
+    try {
+      introspectable = Bus.get_proxy_sync (  BusType.SESSION,
+                                             name,
+                                             MPRIS_MEDIA_PLAYER_PATH );
+      var results = introspectable.introspect();
+      return this.parse_interfaces (results);      
+    }
+    catch (IOError e){
+      warning( "Could not create an introspectable object: %s",
+                e.message );
+    }
+    return false;
+  }
+
+  private bool parse_interfaces( string interface_info )
+  {
+    //parse the document from path
+    debug ("attempting to parse %s", interface_info);
+    Xml.Doc* xml_doc = Parser.parse_doc (interface_info);
+    if (xml_doc == null) {
+      warning ("Mpris2Watcher - parse-interfaces - failed to instantiate xml doc");
+      return false;
+    }
+    //get the root node. notice the dereferencing operator -> instead of .
+    Xml.Node* root_node = xml_doc->get_root_element ();
+    if (root_node == null) {
+      //free the document manually before throwing because the garbage collector can't work on pointers
+      delete xml_doc;
+      warning ("Mpris2Watcher - the interface info xml is empty");
+      return false;
+    }
+
+    //let's parse those nodes
+    for (Xml.Node* iter = root_node->children; iter != null; iter = iter->next) {
+      //spaces btw. tags are also nodes, discard them
+      if (iter->type != ElementType.ELEMENT_NODE)
+          continue; 
+      string node_name = iter->name; //get the node's name    
+      debug ( "this dbus object has interface %s ", node_name );
+    }
+    delete xml_doc;
+    return false;
+  }
   
   // At startup check to see if there are clients up that we are interested in
   // More relevant for development and daemon's like mpd. 
diff --git a/src/music-player-bridge.vala b/src/music-player-bridge.vala
index c7391cf..10c333a 100644
--- a/src/music-player-bridge.vala
+++ b/src/music-player-bridge.vala
@@ -82,8 +82,9 @@ public class MusicPlayerBridge : GLib.Object
       return;
     }
     if (desktop in this.settings_manager.fetch_blacklist()) {
-      debug ("Client %s attempting to register but it has been blacklisted",
+      debug ("Client %s attempting to register but I'm afraid it is blacklisted",
              desktop);
+      return;
     }
     
     debug ( "client_has_become_available %s", desktop );
@@ -118,7 +119,8 @@ public class MusicPlayerBridge : GLib.Object
   
   public void client_has_vanished ( string mpris_root_interface )
   {
-    debug("MusicPlayerBridge -> on_server_removed with value %s", mpris_root_interface);
+    debug("MusicPlayerBridge -> client with dbus interface %s has vanished",
+           mpris_root_interface );
     if (root_menu != null){
       debug("attempt to remove %s", mpris_root_interface);
       var mpris_key = determine_key ( mpris_root_interface );
diff --git a/src/sound-service.c b/src/sound-service.c
index 98f1881..defcb94 100644
--- a/src/sound-service.c
+++ b/src/sound-service.c
@@ -40,8 +40,8 @@ service_shutdown (IndicatorService *service, gpointer user_data)
 {
   if (mainloop != NULL) {
     g_debug("Service shutdown !");
-    close_pulse_activites();
-    g_main_loop_quit(mainloop);
+    //close_pulse_activites();
+    //g_main_loop_quit(mainloop);
   }
   return;
 }