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 package com.android.systemui.keyguard.ui.viewmodel
18 
19 import android.content.Context
20 import com.android.systemui.R
21 import com.android.systemui.keyguard.domain.interactor.BurnInOffsets
22 import com.android.systemui.keyguard.domain.interactor.UdfpsKeyguardInteractor
23 import javax.inject.Inject
24 import kotlin.math.roundToInt
25 import kotlinx.coroutines.ExperimentalCoroutinesApi
26 import kotlinx.coroutines.flow.Flow
27 import kotlinx.coroutines.flow.map
28 
29 /** View-model for UDFPS AOD view. */
30 @ExperimentalCoroutinesApi
31 class UdfpsAodViewModel
32 @Inject
33 constructor(
34     val interactor: UdfpsKeyguardInteractor,
35     val context: Context,
36 ) {
37     val alpha: Flow<Float> = interactor.dozeAmount
38     val burnInOffsets: Flow<BurnInOffsets> = interactor.burnInOffsets
39     val isVisible: Flow<Boolean> = alpha.map { it != 0f }
40 
41     // Padding between the fingerprint icon and its bounding box in pixels.
42     val padding: Flow<Int> =
43         interactor.scaleForResolution.map { scale ->
44             (context.resources.getDimensionPixelSize(R.dimen.lock_icon_padding) * scale)
45                 .roundToInt()
46         }
47 }
48