/*
 * Copyright 2017 Google Inc. All Rights Reserved.
 * 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.google.ar.core.examples.java.common.helpers;

import android.app.Activity;
import android.view.View;

/** Helper to set up the Android full screen mode. */
public final class FullScreenHelper {
  /**
   * Sets the Android fullscreen flags. Expected to be called from {@link
   * Activity#onWindowFocusChanged(boolean hasFocus)}.
   *
   * @param activity the Activity on which the full screen mode will be set.
   * @param hasFocus the hasFocus flag passed from the {@link Activity#onWindowFocusChanged(boolean
   *     hasFocus)} callback.
   */
  public static void setFullScreenOnWindowFocusChanged(Activity activity, boolean hasFocus) {
    if (hasFocus) {
      // https://developer.android.com/training/system-ui/immersive.html#sticky
      activity
          .getWindow()
          .getDecorView()
          .setSystemUiVisibility(
              View.SYSTEM_UI_FLAG_LAYOUT_STABLE
                  | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
                  | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                  | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
                  | View.SYSTEM_UI_FLAG_FULLSCREEN
                  | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
    }
  }
}
