The primary structure of the HomeRoute

CoreHomeRoute.kt

// Copyright 2022 Google LLC.
// SPDX-License-Identifier: Apache-2.0

@Composable
fun HomeRoute(
    isExpandedScreen: Boolean,
    isArticleOpen: Boolean,
    selectedArticleId: String,
    onSelectArticle: (String) -> Unit,
    onArticleBackPress: () -> Unit,
    // ...
) {
    // ...
    if (isExpandedScreen) {
        HomeListWithArticleDetailsScreen(
            selectedArticleId = selectedArticleId,
            onSelectArticle = onSelectArticle,
            // ...
        )
    } else {
        // if we don't have room for both the list and article details,
        // show one of them based on the user's focus
        if (isArticleOpen) {
            ArticleScreen(
                selectedArticleId = selectedArticleId,
                // ...
            )
            BackHandler {
                onArticleBackPress()
            }
        } else {
            HomeListScreen(
                onSelectArticle = onSelectArticle,
                // ...
            )
        }
    }
}