Added changed to reflect the state of the player control buttons

4 files changed, 90 insertions, 7 deletions

diff --git a/src/media-player-mpris.vala b/src/media-player-mpris.vala
index 741d887..8bc2884 100644
--- a/src/media-player-mpris.vala
+++ b/src/media-player-mpris.vala
@@ -79,6 +79,24 @@ public class MediaPlayerMpris: MediaPlayer {
 		}
 	}
 
+	public override bool can_do_play {
+		get {
+			return this.proxy.CanPlay;
+		}
+	}
+	
+	public override bool can_do_prev {
+		get {
+			return this.proxy.CanGoPrevious;
+		}
+	}
+
+	public override bool can_do_next {
+		get {
+			return this.proxy.CanGoNext;
+		}
+	}
+
 	/**
 	 * Attach this object to a process of the associated media player.  The player must own @dbus_name and
 	 * implement the org.mpris.MediaPlayer2.Player interface.
@@ -272,6 +290,9 @@ public class MediaPlayerMpris: MediaPlayer {
 		if (changed_properties.lookup ("PlaybackStatus", "s", null)) {
 			this.state = this.proxy.PlaybackStatus != null ? this.proxy.PlaybackStatus : "Unknown";
 		}
+		if (changed_properties.lookup ("CanGoNext", "b", null) || changed_properties.lookup ("CanGoPrev", "b", null)) {
+			this.playbackstatus_changed ();
+		}
 
 		var metadata = changed_properties.lookup_value ("Metadata", new VariantType ("a{sv}"));
 		if (metadata != null)
diff --git a/src/media-player.vala b/src/media-player.vala
index 4d4aef3..04d1426 100644
--- a/src/media-player.vala
+++ b/src/media-player.vala
@@ -26,6 +26,9 @@ public abstract class MediaPlayer : Object {
 
 	public virtual bool is_running { get { not_implemented(); return false; } }
 	public virtual bool can_raise { get { not_implemented(); return false; } }
+	public virtual bool can_do_next { get { not_implemented(); return false; } }
+	public virtual bool can_do_prev { get { not_implemented(); return false; } }
+	public virtual bool can_do_play { get { not_implemented(); return false; } }
 
 	public class Track : Object {
 		public string artist { get; construct; }
@@ -44,6 +47,7 @@ public abstract class MediaPlayer : Object {
 	}
 
 	public signal void playlists_changed ();
+	public signal void playbackstatus_changed ();
 
 	public abstract void activate ();
 	public abstract void play_pause ();
diff --git a/src/mpris2-interfaces.vala b/src/mpris2-interfaces.vala
index a472d5c..0ed8719 100644
--- a/src/mpris2-interfaces.vala
+++ b/src/mpris2-interfaces.vala
@@ -37,7 +37,10 @@ public interface MprisPlayer : Object {
   // properties
   public abstract HashTable<string, Variant?> Metadata{owned get; set;}
   public abstract int32 Position{owned get; set;}
-  public abstract string? PlaybackStatus{owned get; set;}  
+  public abstract string? PlaybackStatus{owned get; set;} 
+  public abstract bool CanPlay{owned get; set;}
+  public abstract bool CanGoNext{owned get; set;}
+  public abstract bool CanGoPrevious{owned get; set;}
   // methods
   public abstract async void PlayPause() throws IOError;
   public abstract async void Next() throws IOError;
diff --git a/src/sound-menu.vala b/src/sound-menu.vala
index 8718162..7a6044b 100644
--- a/src/sound-menu.vala
+++ b/src/sound-menu.vala
@@ -157,18 +157,26 @@ public class SoundMenu: Object
 		this.update_playlists (player);
 
 		var handler_id = player.notify["is-running"].connect ( () => {
-			if (player.is_running)
-				if (this.find_player_section(player) == -1)
+			if (player.is_running) {
+				int index = this.find_player_section(player);
+				if (index == -1) {
 					this.insert_player_section (player);
-			else
+				}
+				else {
+					update_player_section (player, index);
+				}
+			}
+			else {
 				if (this.hide_inactive)
 					this.remove_player_section (player);
+			}
 
 			this.update_playlists (player);
 		});
 		this.notify_handlers.insert (player, handler_id);
 
 		player.playlists_changed.connect (this.update_playlists);
+		player.playbackstatus_changed.connect (this.update_playbackstatus);
 	}
 
 	public void remove_player (MediaPlayer player) {
@@ -215,6 +223,23 @@ public class SoundMenu: Object
 		return -1;
 	}
 
+	MenuItem create_playback_menu_item (MediaPlayer player) {
+		var playback_item = new MenuItem (null, null);
+		playback_item.set_attribute ("x-canonical-type", "s", "com.canonical.unity.playback-item");
+		if (player.is_running) {
+			if (player.can_do_play) {
+				playback_item.set_attribute ("x-canonical-play-action", "s", "indicator.play." + player.id);
+			}
+			if (player.can_do_next) {
+				playback_item.set_attribute ("x-canonical-next-action", "s", "indicator.next." + player.id);
+			}
+			if (player.can_do_prev) {
+				playback_item.set_attribute ("x-canonical-previous-action", "s", "indicator.previous." + player.id);
+			}
+		}
+		return playback_item;
+	}
+
 	void insert_player_section (MediaPlayer player) {
 		if (this.hide_players)
 			return;
@@ -240,9 +265,21 @@ public class SoundMenu: Object
 
 		var playback_item = new MenuItem (null, null);
 		playback_item.set_attribute ("x-canonical-type", "s", "com.canonical.unity.playback-item");
-		playback_item.set_attribute ("x-canonical-play-action", "s", "indicator.play." + player.id);
-		playback_item.set_attribute ("x-canonical-next-action", "s", "indicator.next." + player.id);
-		playback_item.set_attribute ("x-canonical-previous-action", "s", "indicator.previous." + player.id);
+		playback_item.set_attribute ("x-canonical-play-action", "s", "indicator.play." + player.id + ".disabled");
+		playback_item.set_attribute ("x-canonical-next-action", "s", "indicator.next." + player.id + ".disabled");
+		playback_item.set_attribute ("x-canonical-previous-action", "s", "indicator.previous." + player.id + ".disabled");
+
+		if (player.is_running) {
+			if (player.can_do_play) {
+				playback_item.set_attribute ("x-canonical-play-action", "s", "indicator.play." + player.id);
+			}
+			if (player.can_do_next) {
+				playback_item.set_attribute ("x-canonical-next-action", "s", "indicator.next." + player.id);
+			}
+			if (player.can_do_prev) {
+				playback_item.set_attribute ("x-canonical-previous-action", "s", "indicator.previous." + player.id);
+			}
+		}
 		section.append_item (playback_item);
 
 		/* Add new players to the end of the player sections, just before the settings */
@@ -262,6 +299,17 @@ public class SoundMenu: Object
 			this.menu.remove (index);
 	}
 
+	void update_player_section (MediaPlayer player, int index) {
+		var player_section = this.menu.get_item_link(index, Menu.LINK_SECTION) as Menu;
+		if (player_section.get_n_items () == 2) {
+			// we have 2 items, the second one is the playback item
+			// remove it first
+			player_section.remove (1);
+			MenuItem playback_item = create_playback_menu_item (player);
+			player_section.append_item (playback_item);
+		}
+	}
+
 	void update_playlists (MediaPlayer player) {
 		int index = find_player_section (player);
 		if (index < 0)
@@ -292,6 +340,13 @@ public class SoundMenu: Object
 		submenu.append_section (null, playlists_section);
 		player_section.append_submenu (_("Choose Playlist"), submenu);
 	}
+	
+	void update_playbackstatus (MediaPlayer player) {
+		int index = find_player_section (player);
+		if (index != -1) {
+			update_player_section (player, index);	
+		}
+	}
 
 	MenuItem create_slider_menu_item (string label, string action, double min, double max, double step, string min_icon_name, string max_icon_name) {
 		var min_icon = new ThemedIcon.with_default_fallbacks (min_icon_name);