commonMain.androidx.compose.material.MutableWindowInsets.kt Maven / Gradle / Ivy

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/*
 * Copyright 2023 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.material

import androidx.compose.foundation.layout.WindowInsets
import androidx.compose.runtime.getValue
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.setValue
import androidx.compose.ui.unit.Density
import androidx.compose.ui.unit.LayoutDirection

/**
 * A [WindowInsets] whose values can change without changing the instance. This is useful
 * to avoid recomposition when [WindowInsets] can change.
 *
 * Copied from [androidx.compose.foundation.layout.MutableWindowInsets], which is marked as
 * experimental and thus cannot be used cross-module.
 */
internal class MutableWindowInsets(
    initialInsets: WindowInsets = WindowInsets(0, 0, 0, 0)
) : WindowInsets {
    /**
     * The [WindowInsets] that are used for [left][getLeft], [top][getTop], [right][getRight],
     * and [bottom][getBottom] values.
     */
    var insets by mutableStateOf(initialInsets)

    override fun getLeft(density: Density, layoutDirection: LayoutDirection): Int =
        insets.getLeft(density, layoutDirection)
    override fun getTop(density: Density): Int = insets.getTop(density)
    override fun getRight(density: Density, layoutDirection: LayoutDirection): Int =
        insets.getRight(density, layoutDirection)
    override fun getBottom(density: Density): Int = insets.getBottom(density)
}