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/*
* Copyright (C) 2022 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.systemui.temporarydisplay
import android.graphics.Rect
import android.view.View
import android.view.ViewTreeObserver
import com.android.systemui.util.ViewController
/**
* A view controller that will notify the [ViewTreeObserver] about the touchable region for this
* view. This will be used by WindowManager to decide which touch events go to the view and which
* pass through to the window below.
*
* @param touchableRegionSetter a function that, given the view and an out rect, fills the rect with
* the touchable region of this view.
*/
class TouchableRegionViewController(
view: View,
touchableRegionSetter: (View, Rect) -> Unit,
) : ViewController<View>(view) {
private val tempRect = Rect()
private val internalInsetsListener =
ViewTreeObserver.OnComputeInternalInsetsListener { inoutInfo ->
inoutInfo.setTouchableInsets(
ViewTreeObserver.InternalInsetsInfo.TOUCHABLE_INSETS_REGION
)
tempRect.setEmpty()
touchableRegionSetter.invoke(mView, tempRect)
inoutInfo.touchableRegion.set(tempRect)
}
public override fun onViewAttached() {
mView.viewTreeObserver.addOnComputeInternalInsetsListener(internalInsetsListener)
}
public override fun onViewDetached() {
mView.viewTreeObserver.removeOnComputeInternalInsetsListener(internalInsetsListener)
}
}
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