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+/*
+ * Copyright 2013 Canonical Ltd.
+ *
+ * This program 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; version 3.
+ *
+ * This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Authors:
+ * Lars Uebernickel <lars.uebernickel@canonical.com>
+ */
+
+/**
+ * MediaPlayerList is a list of media players that should appear in the sound menu. Its main responsibility is
+ * to listen for MPRIS players on the bus and attach them to the corresponding %Player objects.
+ */
+public class MediaPlayerListMpris : MediaPlayerList {
+
+ public MediaPlayerListMpris () {
+ this._players = new HashTable<string, MediaPlayerMpris> (str_hash, str_equal);
+
+ BusWatcher.watch_namespace (BusType.SESSION, "org.mpris.MediaPlayer2", this.player_appeared, this.player_disappeared);
+ }
+
+ /* only valid while the list is not changed */
+ public class Iterator : MediaPlayerList.Iterator {
+ HashTableIter<string, MediaPlayerMpris> iter;
+
+ public Iterator (MediaPlayerListMpris list) {
+ this.iter = HashTableIter<string, MediaPlayerMpris> (list._players);
+ }
+
+ public override MediaPlayer? next_value () {
+ MediaPlayerMpris? player;
+
+ if (this.iter.next (null, out player))
+ return player as MediaPlayer;
+ else
+ return null;
+ }
+ }
+
+ public override MediaPlayerList.Iterator iterator () {
+ return new Iterator (this) as MediaPlayerList.Iterator;
+ }
+
+ /**
+ * Adds the player associated with @desktop_id. Does nothing if such a player already exists.
+ */
+ MediaPlayerMpris? insert (string desktop_id) {
+ var id = desktop_id.has_suffix (".desktop") ? desktop_id : desktop_id + ".desktop";
+ MediaPlayerMpris? player = this._players.lookup (id);
+
+ if (player == null) {
+ var appinfo = new DesktopAppInfo (id);
+ if (appinfo == null) {
+ warning ("unable to find application '%s'", id);
+ return null;
+ }
+
+ player = new MediaPlayerMpris (appinfo);
+ this._players.insert (player.id, player);
+ this.player_added (player);
+ }
+
+ return player;
+ }
+
+ /**
+ * Removes the player associated with @desktop_id, unless it is currently running.
+ */
+ void remove (string desktop_id) {
+ MediaPlayer? player = this._players.lookup (desktop_id);
+
+ if (player != null && !player.is_running) {
+ this._players.remove (desktop_id);
+ this.player_removed (player);
+ }
+ }
+
+ /**
+ * Synchronizes the player list with @desktop_ids. After this call, this list will only contain the players
+ * in @desktop_ids. Players that were running but are not in @desktop_ids will remain in the list.
+ */
+ public override void sync (string[] desktop_ids) {
+
+ /* hash desktop_ids for faster lookup */
+ var hash = new HashTable<string, unowned string> (str_hash, str_equal);
+ foreach (var id in desktop_ids)
+ hash.add (id);
+
+ /* remove players that are not desktop_ids */
+ foreach (var id in this._players.get_keys ()) {
+ if (!hash.contains (id))
+ this.remove (id);
+ }
+
+ /* insert all players (insert() takes care of not adding a player twice */
+ foreach (var id in desktop_ids)
+ this.insert (id);
+ }
+
+ HashTable<string, MediaPlayerMpris> _players;
+
+ void player_appeared (DBusConnection connection, string name, string owner) {
+ try {
+ MprisRoot mpris2_root = Bus.get_proxy_sync (BusType.SESSION, name, MPRIS_MEDIA_PLAYER_PATH);
+
+ var player = this.insert (mpris2_root.DesktopEntry);
+ if (player != null)
+ player.attach (mpris2_root, name);
+ }
+ catch (Error e) {
+ warning ("unable to create mpris proxy for '%s': %s", name, e.message);
+ }
+ }
+
+ void player_disappeared (DBusConnection connection, string dbus_name) {
+ MediaPlayerMpris? player = this._players.find ( (name, player) => {
+ return player.dbus_name == dbus_name;
+ });
+
+ if (player != null)
+ player.detach ();
+ }
+}