1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
|
/*
* Copyright © 2014 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:
* Ted Gould <ted@canonical.com>
*/
[DBus (name="org.ayatana.Greeter.List")]
public interface AyatanaGreeterList : Object {
public abstract async string get_active_entry () throws GLib.DBusError, GLib.IOError;
public signal void entry_selected (string entry_name);
}
public class MediaPlayerListGreeter : MediaPlayerList {
string? selected_user = null;
AyatanaGreeterList? proxy = null;
HashTable<string, MediaPlayerUser> players = new HashTable<string, MediaPlayerUser>(str_hash, str_equal);
public MediaPlayerListGreeter () {
Bus.get_proxy.begin<AyatanaGreeterList> (
BusType.SESSION,
"org.ayatana.Greeter",
"/list",
DBusProxyFlags.NONE,
null,
new_proxy);
}
void new_proxy (GLib.Object? obj, AsyncResult res) {
try {
this.proxy = Bus.get_proxy.end(res);
this.proxy.entry_selected.connect(active_user_changed);
this.proxy.get_active_entry.begin ((obj, res) => {
try {
var list = (obj as AyatanaGreeterList);
if (list != null)
{
var value = list.get_active_entry.end(res);
active_user_changed(value);
}
} catch (Error e) {
warning("Unable to get active entry: %s", e.message);
}
});
} catch (Error e) {
this.proxy = null;
warning("Unable to create proxy to the greeter: %s", e.message);
}
}
void active_user_changed (string active_user) {
/* No change, move along */
if (selected_user == active_user) {
return;
}
debug(@"Active user changed to: $active_user");
var old_user = selected_user;
/* Protect against a null user */
if (active_user != "" && active_user[0] != '*') {
selected_user = active_user;
} else {
debug(@"Blocking active user change for '$active_user'");
selected_user = null;
}
if (selected_user != null && !players.contains(selected_user)) {
players.insert(selected_user, new MediaPlayerUser(selected_user));
}
if (old_user != null) {
var old_player = players.lookup(old_user);
debug("Removing player for user: %s", old_user);
player_removed(old_player);
}
if (selected_user != null) {
var new_player = players.lookup(selected_user);
if (new_player != null) {
debug("Adding player for user: %s", selected_user);
player_added(new_player);
}
}
}
/* We need to have an iterator for the interface, but eh, we can
only ever have one player for the current user */
public class Iterator : MediaPlayerList.Iterator {
int i = 0;
MediaPlayerListGreeter list;
public Iterator (MediaPlayerListGreeter in_list) {
list = in_list;
}
public override MediaPlayer? next_value () {
MediaPlayer? retval = null;
if (i == 0 && list.selected_user != null) {
retval = list.players.lookup(list.selected_user);
}
i++;
return retval;
}
}
public override MediaPlayerList.Iterator iterator() {
return new Iterator(this) as MediaPlayerList.Iterator;
}
}
|
