1 /*
2  * Copyright (C) 2023 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  */
17 
18 package com.android.systemui.keyguard.ui.viewmodel
19 
20 import com.android.systemui.doze.util.BurnInHelperWrapper
21 import com.android.systemui.keyguard.domain.interactor.KeyguardInteractor
22 import kotlinx.coroutines.ExperimentalCoroutinesApi
23 import kotlinx.coroutines.flow.Flow
24 import kotlinx.coroutines.flow.distinctUntilChanged
25 import kotlinx.coroutines.flow.map
26 import javax.inject.Inject
27 
28 class KeyguardAmbientIndicationViewModel
29 @Inject
30 constructor(
31     private val keyguardInteractor: KeyguardInteractor,
32     private val burnInHelperWrapper: BurnInHelperWrapper,
33 ) {
34 
35     /** An observable for the x-offset by which the indication area should be translated. */
36     val indicationAreaTranslationX: Flow<Float> =
37         keyguardInteractor.clockPosition.map { it.x.toFloat() }.distinctUntilChanged()
38 
39     /** Returns an observable for the y-offset by which the indication area should be translated. */
40     fun indicationAreaTranslationY(defaultBurnInOffset: Int): Flow<Float> {
41         return keyguardInteractor.dozeAmount
42             .map { dozeAmount ->
43                 dozeAmount *
44                     (burnInHelperWrapper.burnInOffset(
45                         /* amplitude = */ defaultBurnInOffset * 2,
46                         /* xAxis= */ false,
47                     ) - defaultBurnInOffset)
48             }
49             .distinctUntilChanged()
50     }
51 }