Merge "Introduce EdgeToEdgeActivityContent" into udc-qpr-dev am: db3f1d59

/*

 * Copyright (C) 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 com.android.compose.activity

import androidx.compose.foundation.background

import androidx.compose.foundation.isSystemInDarkTheme

import androidx.compose.foundation.layout.Box

import androidx.compose.foundation.layout.fillMaxSize

import androidx.compose.material3.LocalContentColor

import androidx.compose.material3.MaterialTheme

import androidx.compose.material3.contentColorFor

import androidx.compose.runtime.Composable

import androidx.compose.runtime.CompositionLocalProvider

import androidx.compose.runtime.DisposableEffect

import androidx.compose.ui.Modifier

import androidx.compose.ui.graphics.Color

import com.android.compose.rememberSystemUiController

import com.android.compose.theme.PlatformTheme

/** Scaffolding for an edge-to-edge activity content. */

@Composable

fun EdgeToEdgeActivityContent(

    modifier: Modifier = Modifier,

    content: @Composable () -> Unit,

) {

    // Make the status and navigation bars transparent, ensuring that the status bar icons are dark

    // when the theme is light and vice-versa.

    val systemUiController = rememberSystemUiController()

    val isDarkTheme = isSystemInDarkTheme()

    val useDarkIcons = !isDarkTheme

    DisposableEffect(systemUiController, useDarkIcons) {

        systemUiController.setSystemBarsColor(

            color = Color.Transparent,

            darkIcons = useDarkIcons,

        )

        onDispose {}

    }

    PlatformTheme(isDarkTheme) {

        val backgroundColor = MaterialTheme.colorScheme.background

        Box(modifier.fillMaxSize().background(backgroundColor)) {

            CompositionLocalProvider(LocalContentColor provides contentColorFor(backgroundColor)) {

                content()

            }

        }

    }

}