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/*
* Copyright (C) 2020 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.permissioncontroller.permission.utils
import android.app.Activity
import android.app.Application
import android.app.Service
import android.content.Context
import android.content.ContextWrapper
import android.content.pm.ComponentInfo
import android.content.pm.PackageManager
import android.content.pm.ResolveInfo
import android.os.Looper
import android.os.UserHandle
import java.util.concurrent.Executors
import kotlinx.coroutines.asCoroutineDispatcher
/** Gets an [Application] instance from a regular [Context] */
val Context.application: Application
get() =
when (this) {
is Application -> this
is Activity -> application
is Service -> application
is ContextWrapper -> baseContext.application
else -> applicationContext as Application
}
/**
* The number of threads in the IPC thread pool. Set to the maximum number of binder threads allowed
* to an app by the Android System.
*/
const val IPC_THREAD_POOL_COUNT = 8
/** A coroutine dispatcher with a fixed thread pool size, to be used for background tasks */
val IPC = Executors.newFixedThreadPool(IPC_THREAD_POOL_COUNT).asCoroutineDispatcher()
/** Assert that an operation is running on main thread */
fun ensureMainThread() =
check(Looper.myLooper() == Looper.getMainLooper()) {
"Only meant to be used on the main thread"
}
/** A more readable version of [PackageManager.updatePermissionFlags] */
fun PackageManager.updatePermissionFlags(
permissionName: String,
packageName: String,
user: UserHandle,
vararg flags: Pair<Int, Boolean>
) {
val mask = flags.fold(0, { mask, (flag, _) -> mask or flag })
val value =
flags.fold(0, { mask2, (flag, flagValue) -> if (flagValue) mask2 or flag else mask2 })
updatePermissionFlags(permissionName, packageName, mask, value, user)
}
/** Gets a [ComponentInfo] from a [ResolveInfo] */
val ResolveInfo.componentInfo: ComponentInfo
get() {
return (activityInfo as ComponentInfo?)
?: serviceInfo ?: providerInfo ?: throw IllegalStateException("Missing ComponentInfo!")
}
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