add chapters for full screen mode

app/src/main/java/com/github/libretube/adapters/ChaptersAdapter.kt

@@ -27,7 +27,7 @@ class ChaptersAdapter(
             chapterTitle.text = chapter.title
 
             root.setOnClickListener {
-                val chapterStart = chapter.start!!.toLong() * 1000 // s -> ms
+                val chapterStart = chapter.start!! * 1000 // s -> ms
                 exoPlayer.seekTo(chapterStart)
             }
         }

app/src/main/java/com/github/libretube/fragments/PlayerFragment.kt

@@ -335,6 +335,7 @@ class PlayerFragment : Fragment() {
         binding.linLayout.visibility = View.GONE
         playerBinding.fullscreen.setImageResource(R.drawable.ic_fullscreen_exit)
         playerBinding.exoTitle.visibility = View.VISIBLE
+        playerBinding.chapterName.visibility = View.VISIBLE
 
         val mainActivity = activity as MainActivity
         val fullscreenOrientationPref = PreferenceHelper
@@ -372,6 +373,7 @@ class PlayerFragment : Fragment() {
         binding.linLayout.visibility = View.VISIBLE
         playerBinding.fullscreen.setImageResource(R.drawable.ic_fullscreen)
         playerBinding.exoTitle.visibility = View.INVISIBLE
+        playerBinding.chapterName.visibility = View.INVISIBLE
 
         scaleControls(1F)
 
@@ -938,10 +940,31 @@ class PlayerFragment : Fragment() {
 
     private fun initializeChapters(chapters: List<ChapterSegment>) {
         if (chapters.isNotEmpty()) {
+            // enable chapters in the video description
             binding.chaptersRecView.layoutManager =
-                LinearLayoutManager(this.context, LinearLayoutManager.HORIZONTAL, false)
+                LinearLayoutManager(
+                    context,
+                    LinearLayoutManager.HORIZONTAL,
+                    false
+                )
             binding.chaptersRecView.adapter = ChaptersAdapter(chapters, exoPlayer)
             binding.chaptersRecView.visibility = View.VISIBLE
+
+            // enable chapters in the player
+            val titles = mutableListOf<String>()
+            chapters.forEach {
+                titles += it.title!!
+            }
+            playerBinding.chapterName.text = chapters[0].title
+            playerBinding.chapterName.setOnClickListener{
+                MaterialAlertDialogBuilder(requireContext())
+                    .setTitle(R.string.chapters)
+                    .setItems(titles.toTypedArray()) { _, index ->
+                        val position = chapters[index].start!! * 1000
+                        exoPlayer.seekTo(position)
+                    }
+                    .show()
+            }
         }
     }
 

app/src/main/java/com/github/libretube/obj/ChapterSegment.kt

@@ -6,7 +6,7 @@ import com.fasterxml.jackson.annotation.JsonIgnoreProperties
 data class ChapterSegment(
     var title: String?,
     var image: String?,
-    var start: Int?
+    var start: Long?
 ) {
     constructor() : this("", "", -1)
 }

app/src/main/res/layout/exo_styled_player_control_view.xml

@@ -136,6 +136,21 @@
                 android:id="@id/exo_duration"
                 style="@style/ExoStyledControls.TimeText.Duration" />
 
+            <LinearLayout
+                android:id="@+id/chapter_fullscreen"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content">
+
+                <TextView
+                    android:id="@+id/chapter_name"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:layout_marginStart="20dp"
+                    android:textSize="16sp"
+                    android:visibility="gone" />
+
+            </LinearLayout>
+
         </LinearLayout>
 
         <LinearLayout

app/src/main/res/values/strings.xml

@@ -229,4 +229,5 @@
     <string name="twitter">Twitter</string>
     <string name="turnInternetOn">Please connect to the internet by turning on WiFi or mobile data.</string>
     <string name="open">Open …</string>
+    <string name="chapters">Chapters</string>
 </resources>