FullscreenHelper.kt

/* Copyright 2023 Cedric Ferry.
   SPDX-License-Identifier: Apache-2.0 */

import android.view.Window
import androidx.core.view.ViewCompat
import androidx.core.view.WindowCompat
import androidx.core.view.WindowInsetsCompat
import androidx.core.view.WindowInsetsControllerCompat


class FullscreenHelper(val window: Window) {

    fun immersiveExperience(behavior: Int = WindowInsetsControllerCompat.BEHAVIOR_SHOW_BARS_BY_SWIPE) {
        val windowInsetsController =
            WindowCompat.getInsetsController(window, window.decorView)
        // Configure the behavior of the hidden system bars.
        windowInsetsController.systemBarsBehavior = behavior

        // Add a listener to update the behavior of the toggle fullscreen button when
        // the system bars are hidden or revealed.
        ViewCompat.setOnApplyWindowInsetsListener(window.decorView) { view, windowInsets ->
            // You can hide the caption bar even when the other system bars are visible.
            // To account for this, explicitly check the visibility of navigationBars()
            // and statusBars() rather than checking the visibility of systemBars().
            if (windowInsets.isVisible(WindowInsetsCompat.Type.navigationBars())
                || windowInsets.isVisible(WindowInsetsCompat.Type.statusBars())
            ) {
                // Hide both the status bar and the navigation bar.
                windowInsetsController.hide(WindowInsetsCompat.Type.systemBars())
            }
            ViewCompat.onApplyWindowInsets(view, windowInsets)
        }
    }
}