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
|
# Copyright 2025 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
from dsp import BaseHandler, Device, State
class Handler(BaseHandler):
cache: dict[frozenset, Device]
def __init__(self):
self.cache = {}
self.list = []
def cache_state(self, after: State) -> State:
self.cache[after.connected_devices()] = after.get_active()
return after
def plug(self, before: State, after: State, device: Device) -> State:
# G3
if self.g3_or_first(before, after, device):
return self.cache_state(after.switch_to(device))
# follow cache if available
after_state = after.connected_devices()
if after_state in self.cache:
return after.switch_to(self.cache[after_state])
# follow builtin priority
if device.type.builtin_priority >= after.get_active().type.builtin_priority:
return self.cache_state(after.switch_to(device))
return self.cache_state(after)
def unplug(self, before: State, after: State, device: Device) -> State:
# follow cache if available
after_state = after.connected_devices()
if after_state in self.cache:
return after.switch_to(self.cache[after_state])
# do nothing if active device is not unplugged
if after.num_active_devices():
return after
# auto-select random device with highest priority
return after.switch_to(after.max_builtin_priority_device())
def select(self, before: State, device: Device) -> State:
return self.cache_state(before.switch_to(device))
def internal_state(self):
return '; '.join(
''.join(sorted(dev.name for dev in k)) + '=' + v.name
for (k, v) in self.cache.items()
)
|
