BringIntoViewResponder.android.kt
/*
* Copyright 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 androidx.compose.foundation.relocation
import android.graphics.Rect as AndroidRect
import android.view.View
import androidx.compose.foundation.ExperimentalFoundationApi
import androidx.compose.runtime.Composable
import androidx.compose.runtime.remember
import androidx.compose.ui.geometry.Rect
import androidx.compose.ui.layout.LayoutCoordinates
import androidx.compose.ui.layout.positionInRoot
import androidx.compose.ui.platform.LocalView
@OptIn(ExperimentalFoundationApi::class)
@Composable
internal actual fun rememberDefaultBringIntoViewParent(): BringIntoViewParent {
val view = LocalView.current
return remember(view) { AndroidBringIntoViewParent(view) }
}
/**
* A [BringIntoViewParent] that delegates to the [View] hosting the composition.
*/
@OptIn(ExperimentalFoundationApi::class)
private class AndroidBringIntoViewParent(private val view: View) : BringIntoViewParent {
override suspend fun bringChildIntoView(rect: Rect, childCoordinates: LayoutCoordinates) {
val childOffset = childCoordinates.positionInRoot()
val rootRect = rect.translate(childOffset)
view.requestRectangleOnScreen(rootRect.toRect(), false)
}
}
private fun Rect.toRect() = AndroidRect(left.toInt(), top.toInt(), right.toInt(), bottom.toInt())