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1 /*
<lambda>null2  * Copyright (C) 2022 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 distributed under the
11  * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
12  * KIND, either express or implied. See the License for the specific language governing
13  * permissions and limitations under the License.
14  */
15 package com.android.systemui.unfold.util
16 
17 import android.content.Context
18 import android.view.Surface
19 import com.android.systemui.unfold.UnfoldTransitionProgressProvider
20 import com.android.systemui.unfold.UnfoldTransitionProgressProvider.TransitionProgressListener
21 import com.android.systemui.unfold.updates.RotationChangeProvider
22 import com.android.systemui.unfold.updates.RotationChangeProvider.RotationListener
23 
24 /**
25  * [UnfoldTransitionProgressProvider] that emits transition progress only when the display has
26  * default rotation or 180 degrees opposite rotation (ROTATION_0 or ROTATION_180). It could be
27  * helpful to run the animation only when the display's rotation is perpendicular to the fold.
28  */
29 class NaturalRotationUnfoldProgressProvider(
30     private val context: Context,
31     private val rotationChangeProvider: RotationChangeProvider,
32     unfoldTransitionProgressProvider: UnfoldTransitionProgressProvider
33 ) : UnfoldTransitionProgressProvider {
34 
35     private val scopedUnfoldTransitionProgressProvider =
36         ScopedUnfoldTransitionProgressProvider(unfoldTransitionProgressProvider)
37 
38     private var isNaturalRotation: Boolean = false
39 
40     fun init() {
41         rotationChangeProvider.addCallback(rotationListener)
42         rotationListener.onRotationChanged(context.display.rotation)
43     }
44 
45     private val rotationListener = RotationListener { rotation ->
46         val isNewRotationNatural =
47             rotation == Surface.ROTATION_0 || rotation == Surface.ROTATION_180
48 
49         if (isNaturalRotation != isNewRotationNatural) {
50             isNaturalRotation = isNewRotationNatural
51             scopedUnfoldTransitionProgressProvider.setReadyToHandleTransition(isNewRotationNatural)
52         }
53     }
54 
55     override fun destroy() {
56         rotationChangeProvider.removeCallback(rotationListener)
57         scopedUnfoldTransitionProgressProvider.destroy()
58     }
59 
60     override fun addCallback(listener: TransitionProgressListener) {
61         scopedUnfoldTransitionProgressProvider.addCallback(listener)
62     }
63 
64     override fun removeCallback(listener: TransitionProgressListener) {
65         scopedUnfoldTransitionProgressProvider.removeCallback(listener)
66     }
67 }
68