1 /* <lambda>null2 * 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.deviceentry.ui.viewmodel 18 19 import android.graphics.Point 20 import android.view.MotionEvent 21 import android.view.View 22 import com.android.systemui.accessibility.domain.interactor.AccessibilityInteractor 23 import com.android.systemui.biometrics.UdfpsUtils 24 import com.android.systemui.biometrics.domain.interactor.UdfpsOverlayInteractor 25 import com.android.systemui.biometrics.shared.model.UdfpsOverlayParams 26 import kotlinx.coroutines.flow.Flow 27 import kotlinx.coroutines.flow.StateFlow 28 import kotlinx.coroutines.flow.flatMapLatest 29 import kotlinx.coroutines.flow.flowOf 30 31 /** Models the UI state for the UDFPS accessibility overlay */ 32 abstract class UdfpsAccessibilityOverlayViewModel( 33 udfpsOverlayInteractor: UdfpsOverlayInteractor, 34 accessibilityInteractor: AccessibilityInteractor, 35 ) { 36 private val udfpsUtils = UdfpsUtils() 37 private val udfpsOverlayParams: StateFlow<UdfpsOverlayParams> = 38 udfpsOverlayInteractor.udfpsOverlayParams 39 40 val visible: Flow<Boolean> = 41 accessibilityInteractor.isTouchExplorationEnabled.flatMapLatest { touchExplorationEnabled -> 42 if (touchExplorationEnabled) { 43 isVisibleWhenTouchExplorationEnabled() 44 } else { 45 flowOf(false) 46 } 47 } 48 49 abstract fun isVisibleWhenTouchExplorationEnabled(): Flow<Boolean> 50 51 /** Give directional feedback to help the user authenticate with UDFPS. */ 52 fun onHoverEvent(v: View, event: MotionEvent): Boolean { 53 val overlayParams = udfpsOverlayParams.value 54 val scaledTouch: Point = 55 udfpsUtils.getTouchInNativeCoordinates( 56 event.getPointerId(0), 57 event, 58 overlayParams, /* rotateToPortrait */ 59 false 60 ) 61 62 if ( 63 !udfpsUtils.isWithinSensorArea( 64 event.getPointerId(0), 65 event, 66 overlayParams, 67 /* rotateTouchToPortrait */ false 68 ) 69 ) { 70 // view only receives motionEvents when [visible] which requires touchExplorationEnabled 71 val announceStr = 72 udfpsUtils.onTouchOutsideOfSensorArea( 73 /* touchExplorationEnabled */ true, 74 v.context, 75 scaledTouch.x, 76 scaledTouch.y, 77 overlayParams, 78 /* touchRotatedToPortrait */ false 79 ) 80 if (announceStr != null) { 81 v.announceForAccessibility(announceStr) 82 } 83 } 84 // always let the motion events go through to underlying views 85 return false 86 } 87 } 88