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
|
# This file is part of Gajim.
#
# Gajim 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 only.
#
# Gajim 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 Gajim. If not, see <http://www.gnu.org/licenses/>.
from __future__ import annotations
from typing import Any
from typing import Callable
import logging
import sys
from gi.repository import Gio
from gi.repository import GLib
from gajim.common import app
from gajim.common.events import StyleChanged
log = logging.getLogger('gajim.c.dbus.system_style')
class SystemStyleListener:
def __init__(self, callback: Callable[..., None]) -> None:
self._prefer_dark: bool | None = None
self._callback = callback
if sys.platform in ('win32', 'darwin'):
return
try:
self.dbus_proxy = Gio.DBusProxy.new_for_bus_sync(
Gio.BusType.SESSION,
Gio.DBusProxyFlags.NONE,
None,
'org.freedesktop.portal.Desktop',
'/org/freedesktop/portal/desktop',
'org.freedesktop.portal.Settings',
None
)
except GLib.Error as error:
log.info('Settings portal not found: %s', error)
return
self.dbus_proxy.connect('g-signal', self._signal_setting_changed)
self.read_color_scheme()
def read_color_scheme(self) -> None:
try:
result = self.dbus_proxy.call_sync(
'Read',
GLib.Variant('(ss)', ('org.freedesktop.appearance',
'color-scheme')),
Gio.DBusCallFlags.NO_AUTO_START,
-1,
None)
self._prefer_dark = result[0] == 1
except GLib.Error as error:
log.error('Couldn’t read the color-scheme setting: %s',
error.message)
return
def _signal_setting_changed(self,
_proxy: Gio.DBusProxy,
_sender_name: str | None,
signal_name: str,
parameters: GLib.Variant,
*_user_data: Any
) -> None:
if signal_name != 'SettingChanged':
return
namespace, name, value = parameters
if (namespace == 'org.freedesktop.appearance' and
name == 'color-scheme'):
self._prefer_dark = value == 1
self._callback()
app.ged.raise_event(StyleChanged())
@property
def prefer_dark(self) -> bool | None:
return self._prefer_dark
|
