Re-add playback nav

Re-add the ability to navigate back to the currently playing song. Now with a scroll!

app/src/main/java/org/oxycblt/auxio/MainFragment.kt

@@ -4,7 +4,6 @@ import android.content.res.ColorStateList
 import android.os.Bundle
 import android.util.Log
 import android.view.LayoutInflater
-import android.view.Menu
 import android.view.MenuItem
 import android.view.View
 import android.view.ViewGroup
@@ -15,7 +14,9 @@ import androidx.navigation.NavOptions
 import androidx.navigation.fragment.NavHostFragment
 import androidx.navigation.fragment.findNavController
 import androidx.navigation.ui.NavigationUI
+import androidx.navigation.ui.setupWithNavController
 import org.oxycblt.auxio.databinding.FragmentMainBinding
+import org.oxycblt.auxio.detail.DetailViewModel
 import org.oxycblt.auxio.music.MusicStore
 import org.oxycblt.auxio.playback.PlaybackViewModel
 import org.oxycblt.auxio.ui.accent
@@ -26,6 +27,7 @@ import java.lang.IllegalArgumentException
 
 class MainFragment : Fragment() {
     private val playbackModel: PlaybackViewModel by activityViewModels()
+    private val detailModel: DetailViewModel by activityViewModels()
 
     override fun onCreateView(
         inflater: LayoutInflater,
@@ -70,10 +72,8 @@ class MainFragment : Fragment() {
         binding.navBar.itemIconTintList = navTints
         binding.navBar.itemTextColor = navTints
 
-        navController?.let {
-            binding.navBar.setOnNavigationItemSelectedListener { item ->
-                navigateWithItem(item, it)
-            }
+        navController?.let { controller ->
+            binding.navBar.setupWithNavController(controller)
         }
 
         // --- VIEWMODEL SETUP ---
@@ -93,6 +93,19 @@ class MainFragment : Fragment() {
             }
         }
 
+        playbackModel.navToSong.observe(viewLifecycleOwner) {
+            if (it) {
+                if (binding.navBar.selectedItemId != R.id.library_fragment ||
+                    navController!!.currentDestination?.id == R.id.artist_detail_fragment ||
+                    navController.currentDestination?.id == R.id.genre_detail_fragment ||
+                    detailModel.currentAlbum.value == null ||
+                    detailModel.currentAlbum.value?.id != playbackModel.song.value!!.album.id
+                ) {
+                    binding.navBar.selectedItemId = R.id.library_fragment
+                }
+            }
+        }
+
         playbackModel.restorePlaybackIfNeeded(requireContext())
 
         Log.d(this::class.simpleName, "Fragment Created.")
@@ -107,16 +120,11 @@ class MainFragment : Fragment() {
         if (item.itemId != navController.currentDestination!!.id) {
             val builder = NavOptions.Builder().setLaunchSingleTop(true)
 
-            builder.setEnterAnim(R.anim.nav_default_enter_anim)
+            val options = builder.setEnterAnim(R.anim.nav_default_enter_anim)
                 .setExitAnim(R.anim.nav_default_exit_anim)
                 .setPopEnterAnim(R.anim.nav_default_enter_anim)
                 .setPopExitAnim(R.anim.nav_default_exit_anim)
-
-            if ((item.order and Menu.CATEGORY_SECONDARY) == 0) {
-                builder.setPopUpTo(navController.graph.startDestination, false)
-            }
-
-            val options = builder.build()
+                .build()
 
             return try {
                 navController.navigate(item.itemId, null, options)

app/src/main/java/org/oxycblt/auxio/detail/AlbumDetailFragment.kt

@@ -122,6 +122,25 @@ class AlbumDetailFragment : DetailFragment() {
             }
         }
 
+        playbackModel.navToSong.observe(viewLifecycleOwner) {
+            if (it) {
+                val pos = detailModel.currentAlbum.value!!.songs.indexOf(playbackModel.song.value)
+
+                if (pos != -1) {
+                    binding.albumSongRecycler.post {
+                        val y = binding.albumSongRecycler.y +
+                            binding.albumSongRecycler.getChildAt(pos).y
+
+                        binding.nestedScroll.smoothScrollBy(0, y.toInt())
+                    }
+
+                    playbackModel.doneWithNavToPlayingSong()
+                } else {
+                    findNavController().navigateUp()
+                }
+            }
+        }
+
         Log.d(this::class.simpleName, "Fragment created.")
 
         return binding.root

app/src/main/java/org/oxycblt/auxio/detail/ArtistDetailFragment.kt

@@ -14,7 +14,6 @@ import org.oxycblt.auxio.databinding.FragmentArtistDetailBinding
 import org.oxycblt.auxio.detail.adapters.DetailAlbumAdapter
 import org.oxycblt.auxio.music.MusicStore
 import org.oxycblt.auxio.playback.PlaybackViewModel
-
 import org.oxycblt.auxio.ui.disable
 import org.oxycblt.auxio.ui.setupAlbumActions
 

app/src/main/java/org/oxycblt/auxio/detail/DetailFragment.kt

@@ -32,7 +32,6 @@ abstract class DetailFragment : Fragment() {
         super.onPause()
         callback.isEnabled = false
     }
-
     private val callback = object : OnBackPressedCallback(false) {
 
         override fun handleOnBackPressed() {

app/src/main/java/org/oxycblt/auxio/library/LibraryFragment.kt

@@ -151,6 +151,14 @@ class LibraryFragment : Fragment(), SearchView.OnQueryTextListener {
             }
         }
 
+        playbackModel.navToSong.observe(viewLifecycleOwner) {
+            if (it) {
+                libraryModel.updateNavigationStatus(false)
+
+                navToItem(playbackModel.song.value!!.album)
+            }
+        }
+
         Log.d(this::class.simpleName, "Fragment created.")
 
         return binding.root

app/src/main/java/org/oxycblt/auxio/playback/CompactPlaybackFragment.kt

@@ -14,7 +14,6 @@ import org.oxycblt.auxio.MainFragmentDirections
 import org.oxycblt.auxio.R
 import org.oxycblt.auxio.databinding.FragmentCompactPlaybackBinding
 import org.oxycblt.auxio.music.MusicStore
-import org.oxycblt.auxio.ui.createToast
 
 /**
  * A [Fragment] that displays the currently played song at a glance, with some basic controls.
@@ -57,8 +56,10 @@ class CompactPlaybackFragment : Fragment() {
         }
 
         binding.root.setOnLongClickListener {
+            playbackModel.navToPlayingSong()
+            /*
             playbackModel.save(requireContext())
-            getString(R.string.debug_state_saved).createToast(requireContext())
+            getString(R.string.debug_state_saved).createToast(requireContext()) */
             true
         }
 

app/src/main/java/org/oxycblt/auxio/playback/PlaybackViewModel.kt

@@ -58,13 +58,16 @@ class PlaybackViewModel : ViewModel(), PlaybackStateManager.Callback {
     private val mLoopMode = MutableLiveData(LoopMode.NONE)
     val loopMode: LiveData<LoopMode> get() = mLoopMode
 
-    private var mCanAnimate = false
-    val canAnimate: Boolean get() = mCanAnimate
-
     // Other
     private val mIsSeeking = MutableLiveData(false)
     val isSeeking: LiveData<Boolean> get() = mIsSeeking
 
+    private val mNavToSong = MutableLiveData(false)
+    val navToSong: LiveData<Boolean> get() = mNavToSong
+
+    private var mCanAnimate = false
+    val canAnimate: Boolean get() = mCanAnimate
+
     val formattedPosition = Transformations.map(mPosition) {
         it.toDuration()
     }
@@ -279,6 +282,14 @@ class PlaybackViewModel : ViewModel(), PlaybackStateManager.Callback {
         }
     }
 
+    fun navToPlayingSong() {
+        mNavToSong.value = true
+    }
+
+    fun doneWithNavToPlayingSong() {
+        mNavToSong.value = false
+    }
+
     fun resetCanAnimate() {
         mCanAnimate = false
     }

app/src/main/java/org/oxycblt/auxio/ui/InterfaceUtils.kt

@@ -10,7 +10,6 @@ import android.widget.Toast
 import androidx.annotation.ColorInt
 import androidx.annotation.MenuRes
 import androidx.appcompat.widget.PopupMenu
-import androidx.recyclerview.widget.RecyclerView
 import org.oxycblt.auxio.R
 import org.oxycblt.auxio.detail.DetailViewModel
 import org.oxycblt.auxio.music.Album