1 /*
2  * Copyright (C) 2021 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 package com.android.systemui.unfold.updates
17 
18 import android.annotation.FloatRange
19 import android.annotation.IntDef
20 import com.android.systemui.unfold.updates.FoldStateProvider.FoldUpdatesListener
21 import com.android.systemui.statusbar.policy.CallbackController
22 
23 /**
24  * Allows to subscribe to main events related to fold/unfold process such as hinge angle update,
25  * start folding/unfolding, screen availability
26  */
27 interface FoldStateProvider : CallbackController<FoldUpdatesListener> {
28     fun start()
29     fun stop()
30 
31     val isFullyOpened: Boolean
32 
33     interface FoldUpdatesListener {
34         fun onHingeAngleUpdate(@FloatRange(from = 0.0, to = 180.0) angle: Float)
35         fun onFoldUpdate(@FoldUpdate update: Int)
36     }
37 
38     @IntDef(prefix = ["FOLD_UPDATE_"], value = [
39         FOLD_UPDATE_START_OPENING,
40         FOLD_UPDATE_HALF_OPEN,
41         FOLD_UPDATE_START_CLOSING,
42         FOLD_UPDATE_ABORTED,
43         FOLD_UPDATE_UNFOLDED_SCREEN_AVAILABLE,
44         FOLD_UPDATE_FINISH_HALF_OPEN,
45         FOLD_UPDATE_FINISH_FULL_OPEN,
46         FOLD_UPDATE_FINISH_CLOSED
47     ])
48     @Retention(AnnotationRetention.SOURCE)
49     annotation class FoldUpdate
50 }
51 
52 const val FOLD_UPDATE_START_OPENING = 0
53 const val FOLD_UPDATE_HALF_OPEN = 1
54 const val FOLD_UPDATE_START_CLOSING = 2
55 const val FOLD_UPDATE_ABORTED = 3
56 const val FOLD_UPDATE_UNFOLDED_SCREEN_AVAILABLE = 4
57 const val FOLD_UPDATE_FINISH_HALF_OPEN = 5
58 const val FOLD_UPDATE_FINISH_FULL_OPEN = 6
59 const val FOLD_UPDATE_FINISH_CLOSED = 7
60