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+/*
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+ * Nextcloud Android client application
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+ *
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+ * @author Álvaro Brey
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+ * Copyright (C) 2022 Álvaro Brey
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+ * Copyright (C) 2022 Nextcloud GmbH
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+ *
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+ * This program is free software; you can redistribute it and/or
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+ * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
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+ * License as published by the Free Software Foundation; either
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+ * version 3 of the License, or any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU AFFERO GENERAL PUBLIC LICENSE for more details.
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+ *
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+ * You should have received a copy of the GNU Affero General Public
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+ * License along with this program. If not, see <http://www.gnu.org/licenses/>.
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+ *
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+ */
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+
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+package com.owncloud.android.ui.preview
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+
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+import android.app.Activity
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+import android.app.Dialog
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+import android.os.Build
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+import android.view.View
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+import android.view.ViewGroup
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+import android.view.Window
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+import androidx.core.view.WindowCompat
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+import androidx.core.view.WindowInsetsCompat
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+import androidx.core.view.WindowInsetsControllerCompat
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+import com.google.android.exoplayer2.ExoPlayer
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+import com.google.android.exoplayer2.Player
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+import com.google.android.exoplayer2.ui.StyledPlayerView
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+import com.nextcloud.client.media.ExoplayerListener
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+import com.nextcloud.client.media.NextcloudExoPlayer
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+import com.nextcloud.common.NextcloudClient
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+import com.owncloud.android.R
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+import com.owncloud.android.databinding.DialogPreviewVideoBinding
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+import com.owncloud.android.lib.common.utils.Log_OC
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+
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+/**
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+ * Transfers a previously playing video to a fullscreen dialog, and handles the switch back to the previous player
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+ * when closed
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+ *
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+ * @param activity the Activity hosting the original non-fullscreen player
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+ * @param sourceExoPlayer the ExoPlayer playing the video
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+ * @param sourceView the original non-fullscreen surface that [sourceExoPlayer] is linked to
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+ */
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+class PreviewVideoFullscreenDialog(
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+ private val activity: Activity,
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+ nextcloudClient: NextcloudClient,
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+ private val sourceExoPlayer: ExoPlayer,
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+ private val sourceView: StyledPlayerView
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+) : Dialog(sourceView.context, android.R.style.Theme_Black_NoTitleBar_Fullscreen) {
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+
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+ private val binding: DialogPreviewVideoBinding = DialogPreviewVideoBinding.inflate(layoutInflater)
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+ private var playingStateListener: Player.Listener? = null
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+
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+ /**
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+ * exoPlayer instance used for this view, either the original one or a new one in specific cases.
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+ * @see getShouldUseRotatedVideoWorkaround
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+ */
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+ private val mExoPlayer: ExoPlayer
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+
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+ /**
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+ * Videos with rotation metadata present a bug in sdk < 30 where they are rotated incorrectly and stretched when
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+ * the video is resumed on a new surface. To work around this, in those circumstances we'll create a new ExoPlayer
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+ * instance, which is slower but should avoid the bug.
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+ */
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+ private val shouldUseRotatedVideoWorkaround
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+ get() = Build.VERSION.SDK_INT < Build.VERSION_CODES.R && isRotatedVideo()
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+
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+ init {
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+ addContentView(
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+ binding.root,
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+ ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT)
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+ )
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+ mExoPlayer = getExoPlayer(nextcloudClient)
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+ if (shouldUseRotatedVideoWorkaround) {
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+ sourceExoPlayer.currentMediaItem?.let { mExoPlayer.setMediaItem(it, sourceExoPlayer.currentPosition) }
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+ binding.videoPlayer.player = mExoPlayer
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+ mExoPlayer.prepare()
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+ }
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+ }
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+
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+ private fun isRotatedVideo(): Boolean {
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+ val videoFormat = sourceExoPlayer.videoFormat
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+ return videoFormat != null && videoFormat.rotationDegrees != 0
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+ }
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+
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+ private fun getExoPlayer(nextcloudClient: NextcloudClient): ExoPlayer {
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+ return if (shouldUseRotatedVideoWorkaround) {
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+ Log_OC.d(TAG, "Using new ExoPlayer instance to deal with rotated video")
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+ NextcloudExoPlayer
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+ .createNextcloudExoplayer(sourceView.context, nextcloudClient)
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+ .apply {
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+ addListener(ExoplayerListener(sourceView.context, binding.videoPlayer, this))
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+ }
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+ } else {
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+ sourceExoPlayer
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+ }
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+ }
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+
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+ override fun show() {
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+ val isPlaying = sourceExoPlayer.isPlaying
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+ if (isPlaying) {
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+ sourceExoPlayer.pause()
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+ }
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+ enableImmersiveMode()
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+ setOnShowListener {
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+ switchTargetViewFromSource()
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+ setListeners()
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+ if (isPlaying) {
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+ mExoPlayer.play()
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+ }
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+ binding.videoPlayer.showController()
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+ }
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+ super.show()
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+ }
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+
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+ private fun switchTargetViewFromSource() {
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+ if (shouldUseRotatedVideoWorkaround) {
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+ mExoPlayer.seekTo(sourceExoPlayer.currentPosition)
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+ } else {
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+ StyledPlayerView.switchTargetView(sourceExoPlayer, sourceView, binding.videoPlayer)
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+ }
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+ }
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+
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+ private fun setListeners() {
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+ binding.root.findViewById<View>(R.id.exo_exit_fs).setOnClickListener { onBackPressed() }
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+ val pauseButton: View = binding.root.findViewById(R.id.exo_pause)
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+ pauseButton.setOnClickListener { sourceExoPlayer.pause() }
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+ val playButton: View = binding.root.findViewById(R.id.exo_play)
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+ playButton.setOnClickListener { sourceExoPlayer.play() }
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+
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+ val playListener = object : Player.Listener {
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+ override fun onIsPlayingChanged(isPlaying: Boolean) {
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+ super.onIsPlayingChanged(isPlaying)
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+ if (isPlaying) {
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+ playButton.visibility = View.GONE
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+ pauseButton.visibility = View.VISIBLE
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+ } else {
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+ playButton.visibility = View.VISIBLE
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+ pauseButton.visibility = View.GONE
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+ }
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+ }
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+ }
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+ mExoPlayer.addListener(playListener)
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+ playingStateListener = playListener
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+ }
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+
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+ override fun onBackPressed() {
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+ val isPlaying = mExoPlayer.isPlaying
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+ if (isPlaying) {
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+ mExoPlayer.pause()
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+ }
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+ disableImmersiveMode()
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+ setOnDismissListener {
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+ playingStateListener?.let {
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+ mExoPlayer.removeListener(it)
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+ }
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+ switchTargetViewToSource()
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+ if (isPlaying) {
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+ sourceExoPlayer.play()
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+ }
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+ sourceView.showController()
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+ }
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+ dismiss()
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+ }
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+
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+ private fun switchTargetViewToSource() {
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+ if (shouldUseRotatedVideoWorkaround) {
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+ sourceExoPlayer.seekTo(mExoPlayer.currentPosition)
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+ } else {
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+ StyledPlayerView.switchTargetView(sourceExoPlayer, binding.videoPlayer, sourceView)
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+ }
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+ }
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+
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+ private fun enableImmersiveMode() {
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+ // for immersive mode to work properly, need to disable statusbar on activity window, but nav bar in dialog
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+ // otherwise dialog navbar is not hidden, or statusbar padding is the wrong color
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+ activity.window?.let {
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+ hideInset(it, WindowInsetsCompat.Type.statusBars())
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+ }
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+ window?.let {
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+ hideInset(it, WindowInsetsCompat.Type.systemBars())
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+ }
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+ }
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+
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+ private fun hideInset(window: Window, type: Int) {
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+ val windowInsetsController =
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+ WindowCompat.getInsetsController(window, window.decorView)
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+ windowInsetsController.systemBarsBehavior =
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+ WindowInsetsControllerCompat.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE
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+ windowInsetsController.hide(type)
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+ }
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+
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+ private fun disableImmersiveMode() {
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+ activity.window?.let {
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+ val windowInsetsController =
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+ WindowCompat.getInsetsController(it, it.decorView)
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+ windowInsetsController.show(WindowInsetsCompat.Type.systemBars())
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+ } ?: return
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+ }
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+
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+ companion object {
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+ private val TAG = PreviewVideoFullscreenDialog::class.simpleName
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+ }
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+}
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Álvaro Brey