AndroidAccessibilityManager.kt
/*
* Copyright 2021 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 androidx.compose.ui.platform
import android.content.Context
import android.os.Build
import androidx.annotation.DoNotInline
import androidx.annotation.RequiresApi
/**
* Android implementation for [AccessibilityManager].
*/
internal class AndroidAccessibilityManager(context: Context) : AccessibilityManager {
private companion object {
const val FlagContentIcons = 1
const val FlagContentText = 2
const val FlagContentControls = 4
}
private val accessibilityManager = context.getSystemService(Context.ACCESSIBILITY_SERVICE) as
android.view.accessibility.AccessibilityManager
override fun calculateRecommendedTimeoutMillis(
originalTimeoutMillis: Long,
containsIcons: Boolean,
containsText: Boolean,
containsControls: Boolean
): Long {
if (originalTimeoutMillis >= Int.MAX_VALUE) {
return originalTimeoutMillis
}
var uiContentFlags = 0
if (containsIcons) {
uiContentFlags = uiContentFlags or FlagContentIcons
}
if (containsText) {
uiContentFlags = uiContentFlags or FlagContentText
}
if (containsControls) {
uiContentFlags = uiContentFlags or FlagContentControls
}
return if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
val recommended = Api29Impl.getRecommendedTimeoutMillis(
accessibilityManager,
originalTimeoutMillis.toInt(),
uiContentFlags
)
if (recommended == Int.MAX_VALUE) {
Long.MAX_VALUE
} else {
recommended.toLong()
}
} else if (containsControls && accessibilityManager.isTouchExplorationEnabled) {
Long.MAX_VALUE
} else {
originalTimeoutMillis
}
}
}
/**
* This class is here to ensure that the classes that use this API will get verified and can be
* AOT compiled. It is expected that this class will soft-fail verification, but the classes
* which use this method will pass.
*/
@RequiresApi(Build.VERSION_CODES.Q)
internal object Api29Impl {
@DoNotInline
fun getRecommendedTimeoutMillis(
accessibilityManager: android.view.accessibility.AccessibilityManager,
originalTimeout: Int,
uiContentFlags: Int
): Int {
return accessibilityManager.getRecommendedTimeoutMillis(originalTimeout, uiContentFlags)
}
}