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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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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 MediaPlayerList {
public MediaPlayerList () {
this._players = new HashTable<string, MediaPlayer> (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 {
HashTableIter<string, MediaPlayer> iter;
public Iterator (MediaPlayerList list) {
this.iter = HashTableIter<string, MediaPlayer> (list._players);
}
public MediaPlayer? next_value () {
MediaPlayer? player;
if (this.iter.next (null, out player))
return player;
else
return null;
}
}
public Iterator iterator () {
return new Iterator (this);
}
/**
* Adds the player associated with @desktop_id. Does nothing if such a player already exists.
*/
MediaPlayer? insert (string desktop_id) {
var id = desktop_id.has_suffix (".desktop") ? desktop_id : desktop_id + ".desktop";
MediaPlayer? 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 MediaPlayer (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 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);
}
public signal void player_added (MediaPlayer player);
public signal void player_removed (MediaPlayer player);
HashTable<string, MediaPlayer> _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) {
MediaPlayer? player = this._players.find ( (name, player) => {
return player.dbus_name == dbus_name;
});
if (player != null)
player.detach ();
}
}
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