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
|
/*
* Copyright (C) 2021 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.systemui.statusbar.notification;
import android.view.View;
import androidx.annotation.Nullable;
/**
* Used to let views that have an alpha not apply the HARDWARE layer type directly, and instead
* delegate that to specific children. This is useful if we want to fake not having overlapping
* rendering to avoid layer trashing, when fading out a view that is also changing.
*/
public interface NotificationFadeAware {
/**
* Calls {@link View#setLayerType} with {@link View#LAYER_TYPE_HARDWARE} if faded and
* {@link View#LAYER_TYPE_NONE} otherwise.
*/
static void setLayerTypeForFaded(@Nullable View view, boolean faded) {
if (view != null) {
int newLayerType = faded ? View.LAYER_TYPE_HARDWARE : View.LAYER_TYPE_NONE;
view.setLayerType(newLayerType, null);
}
}
/**
* Used like {@link View#setLayerType} with {@link View#LAYER_TYPE_HARDWARE} or
* {@link View#LAYER_TYPE_NONE} except that instead of necessarily affecting this view
* specifically, this may delegate the call to child views.
*
* When set to <code>true</code>, the view has two possible paths:
* 1. If a hardware layer is required to ensure correct appearance of this view, then
* set that layer type.
* 2. Otherwise, delegate this call to children, who might make that call for themselves.
*
* When set to <code>false</code>, the view should undo the above, typically by calling
* {@link View#setLayerType} with {@link View#LAYER_TYPE_NONE} on itself and children, and
* delegating to this method on children where implemented.
*
* When this delegates to {@link View#setLayerType} on this view or a subview, `null` will be
* passed for the `paint` argument of that call.
*/
void setNotificationFaded(boolean faded);
/**
* Interface for the top level notification view that fades and optimizes that through deep
* awareness of individual components.
*/
interface FadeOptimizedNotification extends NotificationFadeAware {
/** Top-level feature switch */
boolean FADE_LAYER_OPTIMIZATION_ENABLED = true;
/** Determine if the notification is currently faded. */
boolean isNotificationFaded();
}
}
|
