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.accessibility.data.repository 18 19 import android.view.accessibility.AccessibilityManager 20 import android.view.accessibility.AccessibilityManager.TouchExplorationStateChangeListener 21 import com.android.app.tracing.FlowTracing.tracedAwaitClose 22 import com.android.app.tracing.FlowTracing.tracedConflatedCallbackFlow 23 import dagger.Module 24 import dagger.Provides 25 import kotlin.time.Duration 26 import kotlin.time.Duration.Companion.milliseconds 27 import kotlinx.coroutines.flow.Flow 28 import kotlinx.coroutines.flow.distinctUntilChanged 29 30 /** Exposes accessibility-related state. */ 31 interface AccessibilityRepository { 32 /** @see [AccessibilityManager.isTouchExplorationEnabled] */ 33 val isTouchExplorationEnabled: Flow<Boolean> 34 /** @see [AccessibilityManager.isEnabled] */ 35 val isEnabled: Flow<Boolean> 36 getRecommendedTimeoutnull37 fun getRecommendedTimeout(originalTimeout: Duration, uiFlags: Int): Duration 38 39 companion object { 40 operator fun invoke(a11yManager: AccessibilityManager): AccessibilityRepository = 41 AccessibilityRepositoryImpl(a11yManager) 42 } 43 } 44 45 private const val TAG = "AccessibilityRepository" 46 47 private class AccessibilityRepositoryImpl(private val manager: AccessibilityManager) : 48 AccessibilityRepository { 49 override val isTouchExplorationEnabled: Flow<Boolean> = <lambda>null50 tracedConflatedCallbackFlow(TAG) { 51 val listener = TouchExplorationStateChangeListener(::trySend) 52 manager.addTouchExplorationStateChangeListener(listener) 53 trySend(manager.isTouchExplorationEnabled) 54 tracedAwaitClose(TAG) { 55 manager.removeTouchExplorationStateChangeListener(listener) 56 } 57 } 58 .distinctUntilChanged() 59 60 override val isEnabled: Flow<Boolean> = <lambda>null61 tracedConflatedCallbackFlow(TAG) { 62 val listener = AccessibilityManager.AccessibilityStateChangeListener(::trySend) 63 manager.addAccessibilityStateChangeListener(listener) 64 trySend(manager.isEnabled) 65 tracedAwaitClose(TAG) { manager.removeAccessibilityStateChangeListener(listener) } 66 } 67 .distinctUntilChanged() 68 getRecommendedTimeoutnull69 override fun getRecommendedTimeout(originalTimeout: Duration, uiFlags: Int): Duration { 70 return manager 71 .getRecommendedTimeoutMillis(originalTimeout.inWholeMilliseconds.toInt(), uiFlags) 72 .milliseconds 73 } 74 } 75 76 @Module 77 object AccessibilityRepositoryModule { provideReponull78 @Provides fun provideRepo(manager: AccessibilityManager) = AccessibilityRepository(manager) 79 } 80