Merge pull request #659 from OxygenCobalt/dev

Version 3.3.0

.github/FUNDING.yml

@@ -0,0 +1 @@
+github: [OxygenCobalt]

.github/ISSUE_TEMPLATE/bug-crash-report.yml

@@ -34,6 +34,7 @@ body:
     attributes:
       label: What android version do you use?
       options:
+        - Android 14
         - Android 13
         - Android 12L
         - Android 12

CHANGELOG.md

@@ -2,8 +2,33 @@
 
 ## dev
 
+## 3.3.0
+
 #### What's New
 - Added ability to rewind/skip tracks by swiping back/forward
+- Added support for demo release type
+- Added playlist importing/export from M3U files
+
+#### What's Improved
+- Music loading will now fail when it hangs
+
+#### What's Changed
+- Albums linked to an artist only as a collaborator are no longer included
+in an artist's album count
+- File name and parent path have been combined into "Path" in the Song Properties
+view
+
+#### What's Fixed
+- Fixed music loading failing on all huawei devices
+- Fixed prior music loads not cancelling when reloading music in settings
+- Fixed certain FLAC files failing to play on some devices
+- Fixed music loading failing when duplicate tags with different casing was present
+
+#### Dev/Meta
+- Revamped path management
+
+
+## 3.2.1
 
 #### What's Improved
 - Added support for native M4A multi-value tags based on duplicate atoms

README.md

@@ -2,8 +2,8 @@
 <h1 align="center"><b>Auxio</b></h1>
 <h4 align="center">A simple, rational music player for android.</h4>
 <p align="center">
-    <a href="https://github.com/oxygencobalt/Auxio/releases/tag/v3.2.0">
-        <img alt="Latest Version" src="https://img.shields.io/static/v1?label=tag&message=v3.2.0&color=64B5F6&style=flat">
+    <a href="https://github.com/oxygencobalt/Auxio/releases/tag/v3.3.0">
+        <img alt="Latest Version" src="https://img.shields.io/static/v1?label=tag&message=v3.3.0&color=64B5F6&style=flat">
     </a>
     <a href="https://github.com/oxygencobalt/Auxio/releases/">
         <img alt="Releases" src="https://img.shields.io/github/downloads/OxygenCobalt/Auxio/total.svg?color=4B95DE&style=flat">

app/build.gradle

@@ -16,13 +16,13 @@ android {
     // it here so that binary stripping will work.
     // TODO: Eventually you might just want to start vendoring the FFMpeg extension so the
     //  NDK use is unified
-    ndkVersion = "23.2.8568313"
+    ndkVersion = "25.2.9519653"
     namespace "org.oxycblt.auxio"
 
     defaultConfig {
         applicationId namespace
-        versionName "3.2.1"
-        versionCode 36
+        versionName "3.3.0"
+        versionCode 37
 
         minSdk 24
         targetSdk 34
@@ -31,6 +31,7 @@ android {
     }
 
     compileOptions {
+        coreLibraryDesugaringEnabled true
         sourceCompatibility JavaVersion.VERSION_17
         targetCompatibility JavaVersion.VERSION_17
     }
@@ -87,8 +88,8 @@ dependencies {
     // General
     implementation "androidx.core:core-ktx:1.12.0"
     implementation "androidx.appcompat:appcompat:1.6.1"
-    implementation "androidx.activity:activity-ktx:1.8.0"
-    implementation "androidx.fragment:fragment-ktx:1.6.1"
+    implementation "androidx.activity:activity-ktx:1.8.2"
+    implementation "androidx.fragment:fragment-ktx:1.6.2"
 
     // Components
     // Deliberately kept on 1.2.1 to prevent a bug where the queue sheet will not collapse on
@@ -111,13 +112,13 @@ dependencies {
     implementation "androidx.navigation:navigation-fragment-ktx:$navigation_version"
 
     // Media
-    implementation "androidx.media:media:1.6.0"
+    implementation "androidx.media:media:1.7.0"
 
     // Preferences
     implementation "androidx.preference:preference-ktx:1.2.1"
 
     // Database
-    def room_version = '2.6.0-rc01'
+    def room_version = '2.6.1'
     implementation "androidx.room:room-runtime:$room_version"
     ksp "androidx.room:room-compiler:$room_version"
     implementation "androidx.room:room-ktx:$room_version"
@@ -127,6 +128,7 @@ dependencies {
     // Exoplayer (Vendored)
     implementation project(":media-lib-exoplayer")
     implementation project(":media-lib-decoder-ffmpeg")
+    coreLibraryDesugaring "com.android.tools:desugar_jdk_libs:2.0.4"
 
     // Image loading
     implementation 'io.coil-kt:coil-base:2.4.0'
@@ -145,6 +147,9 @@ dependencies {
     // Logging
     implementation 'com.jakewharton.timber:timber:5.0.1'
 
+    // Speed dial
+    implementation "com.leinardi.android:speed-dial:3.3.0"
+
     // Testing
     debugImplementation 'com.squareup.leakcanary:leakcanary-android:2.12'
     testImplementation "junit:junit:4.13.2"

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

@@ -76,6 +76,7 @@ class MainFragment :
     private var sheetBackCallback: SheetBackPressedCallback? = null
     private var detailBackCallback: DetailBackPressedCallback? = null
     private var selectionBackCallback: SelectionBackPressedCallback? = null
+    private var speedDialBackCallback: SpeedDialBackPressedCallback? = null
     private var selectionNavigationListener: DialogAwareNavigationListener? = null
     private var lastInsets: WindowInsets? = null
     private var elevationNormal = 0f
@@ -109,6 +110,8 @@ class MainFragment :
             DetailBackPressedCallback(detailModel).also { detailBackCallback = it }
         val selectionBackCallback =
             SelectionBackPressedCallback(listModel).also { selectionBackCallback = it }
+        val speedDialBackCallback =
+            SpeedDialBackPressedCallback(homeModel).also { speedDialBackCallback = it }
 
         selectionNavigationListener = DialogAwareNavigationListener(listModel::dropSelection)
 
@@ -158,6 +161,7 @@ class MainFragment :
         collect(detailModel.toShow.flow, ::handleShow)
         collectImmediately(detailModel.editedPlaylist, detailBackCallback::invalidateEnabled)
         collectImmediately(homeModel.showOuter.flow, ::handleShowOuter)
+        collectImmediately(homeModel.speedDialOpen, speedDialBackCallback::invalidateEnabled)
         collectImmediately(listModel.selected, selectionBackCallback::invalidateEnabled)
         collectImmediately(playbackModel.song, ::updateSong)
         collectImmediately(playbackModel.openPanel.flow, ::handlePanel)
@@ -181,6 +185,7 @@ class MainFragment :
         // navigation, navigation out of detail views, etc. We have to do this here in
         // onResume or otherwise the FragmentManager will have precedence.
         requireActivity().onBackPressedDispatcher.apply {
+            addCallback(viewLifecycleOwner, requireNotNull(speedDialBackCallback))
             addCallback(viewLifecycleOwner, requireNotNull(selectionBackCallback))
             addCallback(viewLifecycleOwner, requireNotNull(detailBackCallback))
             addCallback(viewLifecycleOwner, requireNotNull(sheetBackCallback))
@@ -197,6 +202,7 @@ class MainFragment :
 
     override fun onDestroyBinding(binding: FragmentMainBinding) {
         super.onDestroyBinding(binding)
+        speedDialBackCallback = null
         sheetBackCallback = null
         detailBackCallback = null
         selectionBackCallback = null
@@ -218,6 +224,13 @@ class MainFragment :
             binding.queueSheet.coordinatorLayoutBehavior as QueueBottomSheetBehavior?
 
         val playbackRatio = max(playbackSheetBehavior.calculateSlideOffset(), 0f)
+        if (playbackRatio > 0f && homeModel.speedDialOpen.value) {
+            // Stupid hack to prevent you from sliding the sheet up without closing the speed
+            // dial. Filtering out ACTION_MOVE events will cause back gestures to close the speed
+            // dial, which is super finicky behavior.
+            homeModel.setSpeedDialOpen(false)
+        }
+
         val outPlaybackRatio = 1 - playbackRatio
         val halfOutRatio = min(playbackRatio * 2, 1f)
         val halfInPlaybackRatio = max(playbackRatio - 0.5f, 0f) * 2
@@ -493,4 +506,17 @@ class MainFragment :
             isEnabled = selection.isNotEmpty()
         }
     }
+
+    private inner class SpeedDialBackPressedCallback(private val homeModel: HomeViewModel) :
+        OnBackPressedCallback(false) {
+        override fun handleOnBackPressed() {
+            if (homeModel.speedDialOpen.value) {
+                homeModel.setSpeedDialOpen(false)
+            }
+        }
+
+        fun invalidateEnabled(open: Boolean) {
+            isEnabled = open
+        }
+    }
 }

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

@@ -44,6 +44,7 @@ import org.oxycblt.auxio.music.Music
 import org.oxycblt.auxio.music.MusicParent
 import org.oxycblt.auxio.music.MusicViewModel
 import org.oxycblt.auxio.music.PlaylistDecision
+import org.oxycblt.auxio.music.PlaylistMessage
 import org.oxycblt.auxio.music.Song
 import org.oxycblt.auxio.music.info.Disc
 import org.oxycblt.auxio.playback.PlaybackDecision
@@ -55,6 +56,7 @@ import org.oxycblt.auxio.util.logD
 import org.oxycblt.auxio.util.navigateSafe
 import org.oxycblt.auxio.util.overrideOnOverflowMenuClick
 import org.oxycblt.auxio.util.setFullWidthLookup
+import org.oxycblt.auxio.util.showToast
 import org.oxycblt.auxio.util.unlikelyToBeNull
 
 /**
@@ -126,6 +128,7 @@ class AlbumDetailFragment :
         collect(listModel.menu.flow, ::handleMenu)
         collectImmediately(listModel.selected, ::updateSelection)
         collect(musicModel.playlistDecision.flow, ::handlePlaylistDecision)
+        collect(musicModel.playlistMessage.flow, ::handlePlaylistMessage)
         collectImmediately(
             playbackModel.song, playbackModel.parent, playbackModel.isPlaying, ::updatePlayback)
         collect(playbackModel.playbackDecision.flow, ::handlePlaybackDecision)
@@ -273,12 +276,20 @@ class AlbumDetailFragment :
                         decision.songs.map { it.uid }.toTypedArray())
                 }
                 is PlaylistDecision.New,
+                is PlaylistDecision.Import,
                 is PlaylistDecision.Rename,
-                is PlaylistDecision.Delete -> error("Unexpected playlist decision $decision")
+                is PlaylistDecision.Delete,
+                is PlaylistDecision.Export -> error("Unexpected playlist decision $decision")
             }
         findNavController().navigateSafe(directions)
     }
 
+    private fun handlePlaylistMessage(message: PlaylistMessage?) {
+        if (message == null) return
+        requireContext().showToast(message.stringRes)
+        musicModel.playlistMessage.consume()
+    }
+
     private fun updatePlayback(song: Song?, parent: MusicParent?, isPlaying: Boolean) {
         albumListAdapter.setPlaying(
             song.takeIf { parent == detailModel.currentAlbum.value }, isPlaying)

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

@@ -45,6 +45,7 @@ import org.oxycblt.auxio.music.Music
 import org.oxycblt.auxio.music.MusicParent
 import org.oxycblt.auxio.music.MusicViewModel
 import org.oxycblt.auxio.music.PlaylistDecision
+import org.oxycblt.auxio.music.PlaylistMessage
 import org.oxycblt.auxio.music.Song
 import org.oxycblt.auxio.playback.PlaybackDecision
 import org.oxycblt.auxio.playback.PlaybackViewModel
@@ -54,6 +55,7 @@ import org.oxycblt.auxio.util.logD
 import org.oxycblt.auxio.util.navigateSafe
 import org.oxycblt.auxio.util.overrideOnOverflowMenuClick
 import org.oxycblt.auxio.util.setFullWidthLookup
+import org.oxycblt.auxio.util.showToast
 import org.oxycblt.auxio.util.unlikelyToBeNull
 
 /**
@@ -128,6 +130,7 @@ class ArtistDetailFragment :
         collect(listModel.menu.flow, ::handleMenu)
         collectImmediately(listModel.selected, ::updateSelection)
         collect(musicModel.playlistDecision.flow, ::handlePlaylistDecision)
+        collect(musicModel.playlistMessage.flow, ::handlePlaylistMessage)
         collectImmediately(
             playbackModel.song, playbackModel.parent, playbackModel.isPlaying, ::updatePlayback)
         collect(playbackModel.playbackDecision.flow, ::handlePlaybackDecision)
@@ -276,12 +279,20 @@ class ArtistDetailFragment :
                         decision.songs.map { it.uid }.toTypedArray())
                 }
                 is PlaylistDecision.New,
+                is PlaylistDecision.Import,
                 is PlaylistDecision.Rename,
+                is PlaylistDecision.Export,
                 is PlaylistDecision.Delete -> error("Unexpected playlist decision $decision")
             }
         findNavController().navigateSafe(directions)
     }
 
+    private fun handlePlaylistMessage(message: PlaylistMessage?) {
+        if (message == null) return
+        requireContext().showToast(message.stringRes)
+        musicModel.playlistMessage.consume()
+    }
+
     private fun updatePlayback(song: Song?, parent: MusicParent?, isPlaying: Boolean) {
         val currentArtist = unlikelyToBeNull(detailModel.currentArtist.value)
         val playingItem =

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

@@ -607,6 +607,7 @@ constructor(
                             is ReleaseType.Soundtrack -> AlbumGrouping.SOUNDTRACKS
                             is ReleaseType.Mix -> AlbumGrouping.DJMIXES
                             is ReleaseType.Mixtape -> AlbumGrouping.MIXTAPES
+                            is ReleaseType.Demo -> AlbumGrouping.DEMOS
                         }
                 }
             }
@@ -709,6 +710,7 @@ constructor(
         SOUNDTRACKS(R.string.lbl_soundtracks),
         DJMIXES(R.string.lbl_mixes),
         MIXTAPES(R.string.lbl_mixtapes),
+        DEMOS(R.string.lbl_demos),
         APPEARANCES(R.string.lbl_appears_on),
         LIVE(R.string.lbl_live_group),
         REMIXES(R.string.lbl_remix_group),

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

@@ -45,6 +45,7 @@ import org.oxycblt.auxio.music.Music
 import org.oxycblt.auxio.music.MusicParent
 import org.oxycblt.auxio.music.MusicViewModel
 import org.oxycblt.auxio.music.PlaylistDecision
+import org.oxycblt.auxio.music.PlaylistMessage
 import org.oxycblt.auxio.music.Song
 import org.oxycblt.auxio.playback.PlaybackDecision
 import org.oxycblt.auxio.playback.PlaybackViewModel
@@ -54,6 +55,7 @@ import org.oxycblt.auxio.util.logD
 import org.oxycblt.auxio.util.navigateSafe
 import org.oxycblt.auxio.util.overrideOnOverflowMenuClick
 import org.oxycblt.auxio.util.setFullWidthLookup
+import org.oxycblt.auxio.util.showToast
 import org.oxycblt.auxio.util.unlikelyToBeNull
 
 /**
@@ -125,7 +127,8 @@ class GenreDetailFragment :
         collect(detailModel.toShow.flow, ::handleShow)
         collect(listModel.menu.flow, ::handleMenu)
         collectImmediately(listModel.selected, ::updateSelection)
-        collect(musicModel.playlistDecision.flow, ::handleDecision)
+        collect(musicModel.playlistDecision.flow, ::handlePlaylistDecision)
+        collect(musicModel.playlistMessage.flow, ::handlePlaylistMessage)
         collectImmediately(
             playbackModel.song, playbackModel.parent, playbackModel.isPlaying, ::updatePlayback)
         collect(playbackModel.playbackDecision.flow, ::handlePlaybackDecision)
@@ -259,7 +262,7 @@ class GenreDetailFragment :
         }
     }
 
-    private fun handleDecision(decision: PlaylistDecision?) {
+    private fun handlePlaylistDecision(decision: PlaylistDecision?) {
         if (decision == null) return
         val directions =
             when (decision) {
@@ -269,12 +272,20 @@ class GenreDetailFragment :
                         decision.songs.map { it.uid }.toTypedArray())
                 }
                 is PlaylistDecision.New,
+                is PlaylistDecision.Import,
                 is PlaylistDecision.Rename,
+                is PlaylistDecision.Export,
                 is PlaylistDecision.Delete -> error("Unexpected playlist decision $decision")
             }
         findNavController().navigateSafe(directions)
     }
 
+    private fun handlePlaylistMessage(message: PlaylistMessage?) {
+        if (message == null) return
+        requireContext().showToast(message.stringRes)
+        musicModel.playlistMessage.consume()
+    }
+
     private fun updatePlayback(song: Song?, parent: MusicParent?, isPlaying: Boolean) {
         val currentGenre = unlikelyToBeNull(detailModel.currentGenre.value)
         val playingItem =

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

@@ -21,6 +21,8 @@ package org.oxycblt.auxio.detail
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.MenuItem
+import androidx.activity.result.ActivityResultLauncher
+import androidx.activity.result.contract.ActivityResultContracts
 import androidx.fragment.app.activityViewModels
 import androidx.navigation.fragment.findNavController
 import androidx.navigation.fragment.navArgs
@@ -47,16 +49,20 @@ import org.oxycblt.auxio.music.MusicParent
 import org.oxycblt.auxio.music.MusicViewModel
 import org.oxycblt.auxio.music.Playlist
 import org.oxycblt.auxio.music.PlaylistDecision
+import org.oxycblt.auxio.music.PlaylistMessage
 import org.oxycblt.auxio.music.Song
+import org.oxycblt.auxio.music.external.M3U
 import org.oxycblt.auxio.playback.PlaybackDecision
 import org.oxycblt.auxio.playback.PlaybackViewModel
 import org.oxycblt.auxio.ui.DialogAwareNavigationListener
 import org.oxycblt.auxio.util.collect
 import org.oxycblt.auxio.util.collectImmediately
 import org.oxycblt.auxio.util.logD
+import org.oxycblt.auxio.util.logW
 import org.oxycblt.auxio.util.navigateSafe
 import org.oxycblt.auxio.util.overrideOnOverflowMenuClick
 import org.oxycblt.auxio.util.setFullWidthLookup
+import org.oxycblt.auxio.util.showToast
 import org.oxycblt.auxio.util.unlikelyToBeNull
 
 /**
@@ -80,6 +86,8 @@ class PlaylistDetailFragment :
     private val playlistListAdapter = PlaylistDetailListAdapter(this)
     private var touchHelper: ItemTouchHelper? = null
     private var editNavigationListener: DialogAwareNavigationListener? = null
+    private var getContentLauncher: ActivityResultLauncher<String>? = null
+    private var pendingImportTarget: Playlist? = null
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
@@ -99,6 +107,17 @@ class PlaylistDetailFragment :
 
         editNavigationListener = DialogAwareNavigationListener(detailModel::dropPlaylistEdit)
 
+        getContentLauncher =
+            registerForActivityResult(ActivityResultContracts.GetContent()) { uri ->
+                if (uri == null) {
+                    logW("No URI returned from file picker")
+                    return@registerForActivityResult
+                }
+
+                logD("Received playlist URI $uri")
+                musicModel.importPlaylist(uri, pendingImportTarget)
+            }
+
         // --- UI SETUP ---
         binding.detailNormalToolbar.apply {
             setNavigationOnClickListener { findNavController().navigateUp() }
@@ -142,7 +161,8 @@ class PlaylistDetailFragment :
         collect(detailModel.toShow.flow, ::handleShow)
         collect(listModel.menu.flow, ::handleMenu)
         collectImmediately(listModel.selected, ::updateSelection)
-        collect(musicModel.playlistDecision.flow, ::handleDecision)
+        collect(musicModel.playlistDecision.flow, ::handlePlaylistDecision)
+        collect(musicModel.playlistMessage.flow, ::handlePlaylistMessage)
         collectImmediately(
             playbackModel.song, playbackModel.parent, playbackModel.isPlaying, ::updatePlayback)
         collect(playbackModel.playbackDecision.flow, ::handlePlaybackDecision)
@@ -316,13 +336,31 @@ class PlaylistDetailFragment :
         updateMultiToolbar()
     }
 
-    private fun handleDecision(decision: PlaylistDecision?) {
+    private fun handlePlaylistDecision(decision: PlaylistDecision?) {
         if (decision == null) return
         val directions =
             when (decision) {
+                is PlaylistDecision.Import -> {
+                    logD("Importing playlist")
+                    pendingImportTarget = decision.target
+                    requireNotNull(getContentLauncher) {
+                            "Content picker launcher was not available"
+                        }
+                        .launch(M3U.MIME_TYPE)
+                    musicModel.playlistDecision.consume()
+                    return
+                }
                 is PlaylistDecision.Rename -> {
                     logD("Renaming ${decision.playlist}")
-                    PlaylistDetailFragmentDirections.renamePlaylist(decision.playlist.uid)
+                    PlaylistDetailFragmentDirections.renamePlaylist(
+                        decision.playlist.uid,
+                        decision.template,
+                        decision.applySongs.map { it.uid }.toTypedArray(),
+                        decision.reason)
+                }
+                is PlaylistDecision.Export -> {
+                    logD("Exporting ${decision.playlist}")
+                    PlaylistDetailFragmentDirections.exportPlaylist(decision.playlist.uid)
                 }
                 is PlaylistDecision.Delete -> {
                     logD("Deleting ${decision.playlist}")
@@ -338,6 +376,12 @@ class PlaylistDetailFragment :
         findNavController().navigateSafe(directions)
     }
 
+    private fun handlePlaylistMessage(message: PlaylistMessage?) {
+        if (message == null) return
+        requireContext().showToast(message.stringRes)
+        musicModel.playlistMessage.consume()
+    }
+
     private fun updatePlayback(song: Song?, parent: MusicParent?, isPlaying: Boolean) {
         // Prefer songs that are playing from this playlist.
         playlistListAdapter.setPlaying(

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

@@ -102,10 +102,7 @@ class SongDetailDialog : ViewBindingMaterialDialogFragment<DialogSongDetailBindi
                             }
                         add(SongProperty(R.string.lbl_disc, zipped))
                     }
-                    add(SongProperty(R.string.lbl_file_name, song.path.name))
-                    add(
-                        SongProperty(
-                            R.string.lbl_relative_path, song.path.parent.resolveName(context)))
+                    add(SongProperty(R.string.lbl_path, song.path.resolve(context)))
                     info.resolvedMimeType.resolveName(context)?.let {
                         add(SongProperty(R.string.lbl_format, it))
                     }

app/src/main/java/org/oxycblt/auxio/detail/header/ArtistDetailHeaderAdapter.kt

@@ -71,7 +71,11 @@ private constructor(private val binding: ItemDetailHeaderBinding) :
         binding.detailInfo.text =
             binding.context.getString(
                 R.string.fmt_two,
-                binding.context.getPlural(R.plurals.fmt_album_count, artist.albums.size),
+                if (artist.explicitAlbums.isNotEmpty()) {
+                    binding.context.getPlural(R.plurals.fmt_album_count, artist.explicitAlbums.size)
+                } else {
+                    binding.context.getString(R.string.def_album_count)
+                },
                 if (artist.songs.isNotEmpty()) {
                     binding.context.getPlural(R.plurals.fmt_song_count, artist.songs.size)
                 } else {

app/src/main/java/org/oxycblt/auxio/home/FlipFloatingActionButton.kt

@@ -1,117 +0,0 @@
-/*
- * Copyright (c) 2023 Auxio Project
- * FlipFloatingActionButton.kt is part of Auxio.
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
- 
-package org.oxycblt.auxio.home
-
-import android.content.Context
-import android.util.AttributeSet
-import androidx.annotation.DrawableRes
-import androidx.annotation.StringRes
-import com.google.android.material.R
-import com.google.android.material.floatingactionbutton.FloatingActionButton
-import org.oxycblt.auxio.util.logD
-
-/**
- * An extension of [FloatingActionButton] that enables the ability to fade in and out between
- * several states, as in the Material Design 3 specification.
- *
- * @author Alexander Capehart (OxygenCobalt)
- */
-class FlipFloatingActionButton
-@JvmOverloads
-constructor(
-    context: Context,
-    attrs: AttributeSet? = null,
-    defStyleAttr: Int = R.attr.floatingActionButtonStyle
-) : FloatingActionButton(context, attrs, defStyleAttr) {
-    private var pendingConfig: PendingConfig? = null
-    private var flipping = false
-
-    override fun show() {
-        // Will already show eventually, need to do nothing.
-        if (flipping) {
-            logD("Already flipping, aborting show")
-            return
-        }
-        // Apply the new configuration possibly set in flipTo. This should occur even if
-        // a flip was canceled by a hide.
-        pendingConfig?.run {
-            logD("Applying pending configuration")
-            setImageResource(iconRes)
-            contentDescription = context.getString(contentDescriptionRes)
-            setOnClickListener(clickListener)
-        }
-        pendingConfig = null
-        logD("Beginning show")
-        super.show()
-    }
-
-    override fun hide() {
-        if (flipping) {
-            logD("Hide was called, aborting flip")
-        }
-        // Not flipping anymore, disable the flag so that the FAB is not re-shown.
-        flipping = false
-        // Don't pass any kind of listener so that future flip operations will not be able
-        // to show the FAB again.
-        logD("Beginning hide")
-        super.hide()
-    }
-
-    /**
-     * Flip to a new FAB state.
-     *
-     * @param iconRes The resource of the new FAB icon.
-     * @param contentDescriptionRes The resource of the new FAB content description.
-     */
-    fun flipTo(
-        @DrawableRes iconRes: Int,
-        @StringRes contentDescriptionRes: Int,
-        clickListener: OnClickListener
-    ) {
-        // Avoid doing a flip if the given config is already being applied.
-        if (tag == iconRes) return
-        tag = iconRes
-        pendingConfig = PendingConfig(iconRes, contentDescriptionRes, clickListener)
-
-        // Already hiding for whatever reason, apply the configuration when the FAB is shown again.
-        if (!isOrWillBeHidden) {
-            logD("Starting hide for flip")
-            flipping = true
-            // We will re-show the FAB later, assuming that there was not a prior flip operation.
-            super.hide(FlipVisibilityListener())
-        } else {
-            logD("Already hiding, will apply config later")
-        }
-    }
-
-    private data class PendingConfig(
-        @DrawableRes val iconRes: Int,
-        @StringRes val contentDescriptionRes: Int,
-        val clickListener: OnClickListener
-    )
-
-    private inner class FlipVisibilityListener : OnVisibilityChangedListener() {
-        override fun onHidden(fab: FloatingActionButton) {
-            if (!flipping) return
-            logD("Starting show for flip")
-            flipping = false
-            show()
-        }
-    }
-}

app/src/main/java/org/oxycblt/auxio/home/HomeFragment.kt

@@ -21,6 +21,7 @@ package org.oxycblt.auxio.home
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.MenuItem
+import android.view.MotionEvent
 import android.view.View
 import androidx.activity.result.ActivityResultLauncher
 import androidx.activity.result.contract.ActivityResultContracts
@@ -36,10 +37,14 @@ import androidx.recyclerview.widget.RecyclerView
 import androidx.viewpager2.adapter.FragmentStateAdapter
 import androidx.viewpager2.widget.ViewPager2
 import com.google.android.material.appbar.AppBarLayout
+import com.google.android.material.floatingactionbutton.FloatingActionButton
 import com.google.android.material.tabs.TabLayoutMediator
 import com.google.android.material.transition.MaterialSharedAxis
+import com.leinardi.android.speeddial.SpeedDialActionItem
+import com.leinardi.android.speeddial.SpeedDialView
 import dagger.hilt.android.AndroidEntryPoint
 import java.lang.reflect.Field
+import java.lang.reflect.Method
 import kotlin.math.abs
 import org.oxycblt.auxio.BuildConfig
 import org.oxycblt.auxio.R
@@ -64,16 +69,22 @@ import org.oxycblt.auxio.music.MusicViewModel
 import org.oxycblt.auxio.music.NoAudioPermissionException
 import org.oxycblt.auxio.music.NoMusicException
 import org.oxycblt.auxio.music.PERMISSION_READ_AUDIO
+import org.oxycblt.auxio.music.Playlist
 import org.oxycblt.auxio.music.PlaylistDecision
+import org.oxycblt.auxio.music.PlaylistMessage
 import org.oxycblt.auxio.music.Song
+import org.oxycblt.auxio.music.external.M3U
 import org.oxycblt.auxio.playback.PlaybackViewModel
 import org.oxycblt.auxio.util.collect
 import org.oxycblt.auxio.util.collectImmediately
 import org.oxycblt.auxio.util.getColorCompat
+import org.oxycblt.auxio.util.isUnder
 import org.oxycblt.auxio.util.lazyReflectedField
+import org.oxycblt.auxio.util.lazyReflectedMethod
 import org.oxycblt.auxio.util.logD
 import org.oxycblt.auxio.util.logW
 import org.oxycblt.auxio.util.navigateSafe
+import org.oxycblt.auxio.util.showToast
 
 /**
  * The starting [SelectionFragment] of Auxio. Shows the user's music library and enables navigation
@@ -83,13 +94,17 @@ import org.oxycblt.auxio.util.navigateSafe
  */
 @AndroidEntryPoint
 class HomeFragment :
-    SelectionFragment<FragmentHomeBinding>(), AppBarLayout.OnOffsetChangedListener {
+    SelectionFragment<FragmentHomeBinding>(),
+    AppBarLayout.OnOffsetChangedListener,
+    SpeedDialView.OnActionSelectedListener {
     override val listModel: ListViewModel by activityViewModels()
     override val musicModel: MusicViewModel by activityViewModels()
     override val playbackModel: PlaybackViewModel by activityViewModels()
     private val homeModel: HomeViewModel by activityViewModels()
     private val detailModel: DetailViewModel by activityViewModels()
     private var storagePermissionLauncher: ActivityResultLauncher<String>? = null
+    private var getContentLauncher: ActivityResultLauncher<String>? = null
+    private var pendingImportTarget: Playlist? = null
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
@@ -118,7 +133,39 @@ class HomeFragment :
                 musicModel.refresh()
             }
 
+        getContentLauncher =
+            registerForActivityResult(ActivityResultContracts.GetContent()) { uri ->
+                if (uri == null) {
+                    logW("No URI returned from file picker")
+                    return@registerForActivityResult
+                }
+
+                logD("Received playlist URI $uri")
+                musicModel.importPlaylist(uri, pendingImportTarget)
+            }
+
         // --- UI SETUP ---
+
+        binding.root.rootView.apply {
+            // Stock bottom sheet overlay won't work with our nested UI setup, have to replicate
+            // it ourselves.
+            findViewById<View>(R.id.main_scrim).setOnClickListener {
+                homeModel.setSpeedDialOpen(false)
+            }
+
+            findViewById<View>(R.id.main_scrim).setOnTouchListener { _, event ->
+                handleSpeedDialBoundaryTouch(event)
+            }
+
+            findViewById<View>(R.id.sheet_scrim).setOnClickListener {
+                homeModel.setSpeedDialOpen(false)
+            }
+
+            findViewById<View>(R.id.sheet_scrim).setOnTouchListener { _, event ->
+                handleSpeedDialBoundaryTouch(event)
+            }
+        }
+
         binding.homeAppbar.addOnOffsetChangedListener(this)
         binding.homeNormalToolbar.apply {
             setOnMenuItemClickListener(this@HomeFragment)
@@ -166,14 +213,30 @@ class HomeFragment :
         // re-creating the ViewPager.
         setupPager(binding)
 
+        binding.homeShuffleFab.setOnClickListener { playbackModel.shuffleAll() }
+
+        binding.homeNewPlaylistFab.apply {
+            inflate(R.menu.new_playlist_actions)
+            setOnActionSelectedListener(this@HomeFragment)
+            setChangeListener(homeModel::setSpeedDialOpen)
+        }
+
+        hideAllFabs()
+        updateFabVisibility(
+            homeModel.songList.value,
+            homeModel.isFastScrolling.value,
+            homeModel.currentTabType.value)
+
         // --- VIEWMODEL SETUP ---
         collect(homeModel.recreateTabs.flow, ::handleRecreate)
         collectImmediately(homeModel.currentTabType, ::updateCurrentTab)
         collectImmediately(homeModel.songList, homeModel.isFastScrolling, ::updateFab)
+        collect(homeModel.speedDialOpen, ::updateSpeedDial)
         collect(listModel.menu.flow, ::handleMenu)
         collectImmediately(listModel.selected, ::updateSelection)
         collectImmediately(musicModel.indexingState, ::updateIndexerState)
         collect(musicModel.playlistDecision.flow, ::handleDecision)
+        collectImmediately(musicModel.playlistMessage.flow, ::handlePlaylistMessage)
         collect(detailModel.toShow.flow, ::handleShow)
     }
 
@@ -191,6 +254,8 @@ class HomeFragment :
         storagePermissionLauncher = null
         binding.homeAppbar.removeOnOffsetChangedListener(this)
         binding.homeNormalToolbar.setOnMenuItemClickListener(null)
+        binding.homeNewPlaylistFab.setChangeListener(null)
+        binding.homeNewPlaylistFab.setOnActionSelectedListener(null)
     }
 
     override fun onOffsetChanged(appBarLayout: AppBarLayout, verticalOffset: Int) {
@@ -249,6 +314,24 @@ class HomeFragment :
         }
     }
 
+    override fun onActionSelected(actionItem: SpeedDialActionItem): Boolean {
+        when (actionItem.id) {
+            R.id.action_new_playlist -> {
+                logD("Creating playlist")
+                musicModel.createPlaylist()
+            }
+            R.id.action_import_playlist -> {
+                logD("Importing playlist")
+                musicModel.importPlaylist()
+            }
+            else -> {}
+        }
+        // Returning false to close th speed dial results in no animation, manually close instead.
+        // Adapted from Material Files: https://github.com/zhanghai/MaterialFiles
+        requireBinding().homeNewPlaylistFab.close()
+        return true
+    }
+
     private fun setupPager(binding: FragmentHomeBinding) {
         binding.homePager.adapter =
             HomePagerAdapter(homeModel.currentTabTypes, childFragmentManager, viewLifecycleOwner)
@@ -291,17 +374,7 @@ class HomeFragment :
                 MusicType.PLAYLISTS -> R.id.home_playlist_recycler
             }
 
-        if (tabType != MusicType.PLAYLISTS) {
-            logD("Flipping to shuffle button")
-            binding.homeFab.flipTo(R.drawable.ic_shuffle_off_24, R.string.desc_shuffle_all) {
-                playbackModel.shuffleAll()
-            }
-        } else {
-            logD("Flipping to playlist button")
-            binding.homeFab.flipTo(R.drawable.ic_add_24, R.string.desc_new_playlist) {
-                musicModel.createPlaylist()
-            }
-        }
+        updateFabVisibility(homeModel.songList.value, homeModel.isFastScrolling.value, tabType)
     }
 
     private fun handleRecreate(recreate: Unit?) {
@@ -333,7 +406,10 @@ class HomeFragment :
     private fun setupCompleteState(binding: FragmentHomeBinding, error: Exception?) {
         if (error == null) {
             logD("Received ok response")
-            binding.homeFab.show()
+            updateFabVisibility(
+                homeModel.songList.value,
+                homeModel.isFastScrolling.value,
+                homeModel.currentTabType.value)
             binding.homeIndexingContainer.visibility = View.INVISIBLE
             return
         }
@@ -420,11 +496,32 @@ class HomeFragment :
             when (decision) {
                 is PlaylistDecision.New -> {
                     logD("Creating new playlist")
-                    HomeFragmentDirections.newPlaylist(decision.songs.map { it.uid }.toTypedArray())
+                    HomeFragmentDirections.newPlaylist(
+                        decision.songs.map { it.uid }.toTypedArray(),
+                        decision.template,
+                        decision.reason)
+                }
+                is PlaylistDecision.Import -> {
+                    logD("Importing playlist")
+                    pendingImportTarget = decision.target
+                    requireNotNull(getContentLauncher) {
+                            "Content picker launcher was not available"
+                        }
+                        .launch(M3U.MIME_TYPE)
+                    musicModel.playlistDecision.consume()
+                    return
                 }
                 is PlaylistDecision.Rename -> {
                     logD("Renaming ${decision.playlist}")
-                    HomeFragmentDirections.renamePlaylist(decision.playlist.uid)
+                    HomeFragmentDirections.renamePlaylist(
+                        decision.playlist.uid,
+                        decision.template,
+                        decision.applySongs.map { it.uid }.toTypedArray(),
+                        decision.reason)
+                }
+                is PlaylistDecision.Export -> {
+                    logD("Exporting ${decision.playlist}")
+                    HomeFragmentDirections.exportPlaylist(decision.playlist.uid)
                 }
                 is PlaylistDecision.Delete -> {
                     logD("Deleting ${decision.playlist}")
@@ -439,20 +536,130 @@ class HomeFragment :
         findNavController().navigateSafe(directions)
     }
 
+    private fun handlePlaylistMessage(message: PlaylistMessage?) {
+        if (message == null) return
+        requireContext().showToast(message.stringRes)
+        musicModel.playlistMessage.consume()
+    }
+
     private fun updateFab(songs: List<Song>, isFastScrolling: Boolean) {
+        updateFabVisibility(songs, isFastScrolling, homeModel.currentTabType.value)
+    }
+
+    private fun updateFabVisibility(
+        songs: List<Song>,
+        isFastScrolling: Boolean,
+        tabType: MusicType
+    ) {
         val binding = requireBinding()
         // If there are no songs, it's likely that the library has not been loaded, so
         // displaying the shuffle FAB makes no sense. We also don't want the fast scroll
         // popup to overlap with the FAB, so we hide the FAB when fast scrolling too.
         if (songs.isEmpty() || isFastScrolling) {
             logD("Hiding fab: [empty: ${songs.isEmpty()} scrolling: $isFastScrolling]")
-            binding.homeFab.hide()
+            hideAllFabs()
         } else {
-            logD("Showing fab")
-            binding.homeFab.show()
+            if (tabType != MusicType.PLAYLISTS) {
+                logD("Showing shuffle button")
+                if (binding.homeShuffleFab.isOrWillBeShown) {
+                    logD("Nothing to do")
+                    return
+                }
+
+                if (binding.homeNewPlaylistFab.mainFab.isOrWillBeShown) {
+                    logD("Animating transition")
+                    binding.homeNewPlaylistFab.hide(
+                        object : FloatingActionButton.OnVisibilityChangedListener() {
+                            override fun onHidden(fab: FloatingActionButton) {
+                                super.onHidden(fab)
+                                binding.homeShuffleFab.show()
+                            }
+                        })
+                } else {
+                    logD("Showing immediately")
+                    binding.homeShuffleFab.show()
+                }
+            } else {
+                logD("Showing playlist button")
+                if (binding.homeNewPlaylistFab.mainFab.isOrWillBeShown) {
+                    logD("Nothing to do")
+                    return
+                }
+
+                if (binding.homeShuffleFab.isOrWillBeShown) {
+                    logD("Animating transition")
+                    binding.homeShuffleFab.hide(
+                        object : FloatingActionButton.OnVisibilityChangedListener() {
+                            override fun onHidden(fab: FloatingActionButton) {
+                                super.onHidden(fab)
+                                binding.homeNewPlaylistFab.show()
+                            }
+                        })
+                } else {
+                    logD("Showing immediately")
+                    binding.homeNewPlaylistFab.show()
+                }
+            }
         }
     }
 
+    private fun hideAllFabs() {
+        val binding = requireBinding()
+        if (binding.homeShuffleFab.isOrWillBeShown) {
+            FAB_HIDE_FROM_USER_FIELD.invoke(binding.homeShuffleFab, null, false)
+        }
+        if (binding.homeNewPlaylistFab.mainFab.isOrWillBeShown) {
+            FAB_HIDE_FROM_USER_FIELD.invoke(binding.homeNewPlaylistFab.mainFab, null, false)
+        }
+    }
+
+    private fun updateSpeedDial(open: Boolean) {
+        val binding = requireBinding()
+
+        binding.root.rootView.apply {
+            // Stock bottom sheet overlay won't work with our nested UI setup, have to replicate
+            // it ourselves.
+            findViewById<View>(R.id.main_scrim).isClickable = open
+            findViewById<View>(R.id.sheet_scrim).isClickable = open
+        }
+
+        if (open) {
+            binding.homeNewPlaylistFab.open(true)
+        } else {
+            binding.homeNewPlaylistFab.close(true)
+        }
+    }
+
+    private fun handleSpeedDialBoundaryTouch(event: MotionEvent): Boolean {
+        val binding = binding ?: return false
+
+        if (homeModel.speedDialOpen.value && binding.homeNewPlaylistFab.isUnder(event.x, event.y)) {
+            // Convert absolute coordinates to relative coordinates
+            val offsetX = event.x - binding.homeNewPlaylistFab.x
+            val offsetY = event.y - binding.homeNewPlaylistFab.y
+
+            // Create a new MotionEvent with relative coordinates
+            val relativeEvent =
+                MotionEvent.obtain(
+                    event.downTime,
+                    event.eventTime,
+                    event.action,
+                    offsetX,
+                    offsetY,
+                    event.metaState)
+
+            // Dispatch the relative MotionEvent to the target child view
+            val handled = binding.homeNewPlaylistFab.dispatchTouchEvent(relativeEvent)
+
+            // Recycle the relative MotionEvent
+            relativeEvent.recycle()
+
+            return handled
+        }
+
+        return false
+    }
+
     private fun handleShow(show: Show?) {
         when (show) {
             is Show.SongDetails -> {
@@ -568,6 +775,12 @@ class HomeFragment :
     private companion object {
         val VP_RECYCLER_FIELD: Field by lazyReflectedField(ViewPager2::class, "mRecyclerView")
         val RV_TOUCH_SLOP_FIELD: Field by lazyReflectedField(RecyclerView::class, "mTouchSlop")
+        val FAB_HIDE_FROM_USER_FIELD: Method by
+            lazyReflectedMethod(
+                FloatingActionButton::class,
+                "hide",
+                FloatingActionButton.OnVisibilityChangedListener::class,
+                Boolean::class)
         const val KEY_LAST_TRANSITION_ID = BuildConfig.APPLICATION_ID + ".key.LAST_TRANSITION_AXIS"
     }
 }

app/src/main/java/org/oxycblt/auxio/home/HomeViewModel.kt

@@ -156,6 +156,10 @@ constructor(
     /** A marker for whether the user is fast-scrolling in the home view or not. */
     val isFastScrolling: StateFlow<Boolean> = _isFastScrolling
 
+    private val _speedDialOpen = MutableStateFlow(false)
+    /** A marker for whether the speed dial is open or not. */
+    val speedDialOpen: StateFlow<Boolean> = _speedDialOpen
+
     private val _showOuter = MutableEvent<Outer>()
     val showOuter: Event<Outer>
         get() = _showOuter
@@ -293,6 +297,16 @@ constructor(
         _isFastScrolling.value = isFastScrolling
     }
 
+    /**
+     * Update whether the speed dial is open or not.
+     *
+     * @param speedDialOpen true if the speed dial is open, false otherwise.
+     */
+    fun setSpeedDialOpen(speedDialOpen: Boolean) {
+        logD("Updating speed dial state: $speedDialOpen")
+        _speedDialOpen.value = speedDialOpen
+    }
+
     fun showSettings() {
         _showOuter.put(Outer.Settings)
     }

app/src/main/java/org/oxycblt/auxio/home/ThemedSpeedDialView.kt

@@ -0,0 +1,274 @@
+/*
+ * Copyright (c) 2018 Auxio Project
+ * ThemedSpeedDialView.kt is part of Auxio.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
+package org.oxycblt.auxio.home
+
+import android.animation.Animator
+import android.animation.AnimatorListenerAdapter
+import android.animation.AnimatorSet
+import android.animation.ObjectAnimator
+import android.content.Context
+import android.content.res.ColorStateList
+import android.graphics.drawable.Drawable
+import android.graphics.drawable.RotateDrawable
+import android.os.Bundle
+import android.os.Parcelable
+import android.util.AttributeSet
+import android.util.Property
+import android.view.View
+import android.widget.ImageView
+import android.widget.TextView
+import androidx.annotation.AttrRes
+import androidx.annotation.FloatRange
+import androidx.core.os.BundleCompat
+import androidx.core.view.setMargins
+import androidx.core.view.updateLayoutParams
+import androidx.core.widget.TextViewCompat
+import androidx.interpolator.view.animation.FastOutSlowInInterpolator
+import com.google.android.material.shape.MaterialShapeDrawable
+import com.leinardi.android.speeddial.FabWithLabelView
+import com.leinardi.android.speeddial.SpeedDialActionItem
+import com.leinardi.android.speeddial.SpeedDialView
+import kotlin.math.roundToInt
+import kotlinx.parcelize.Parcelize
+import org.oxycblt.auxio.R
+import org.oxycblt.auxio.util.getAttrColorCompat
+import org.oxycblt.auxio.util.getDimen
+import org.oxycblt.auxio.util.getDimenPixels
+
+/**
+ * Customized Speed Dial view with some bug fixes and Material 3 theming.
+ *
+ * Adapted from Material Files:
+ * https://github.com/zhanghai/MaterialFiles/tree/79f1727cec72a6a089eb495f79193f87459fc5e3
+ *
+ * MODIFICATIONS:
+ * - Removed dynamic theme changes based on the MaterialFile's Material 3 setting
+ * - Adapted code to the extensions in this project
+ *
+ * @author Hai Zhang, Alexander Capehart (OxygenCobalt)
+ */
+class ThemedSpeedDialView : SpeedDialView {
+    private var mainFabAnimator: Animator? = null
+    private val spacingSmall = context.getDimenPixels(R.dimen.spacing_small)
+    private var innerChangeListener: ((Boolean) -> Unit)? = null
+
+    constructor(context: Context) : super(context)
+
+    constructor(context: Context, attrs: AttributeSet?) : super(context, attrs)
+
+    constructor(
+        context: Context,
+        attrs: AttributeSet?,
+        @AttrRes defStyleAttr: Int
+    ) : super(context, attrs, defStyleAttr)
+
+    init {
+        // Work around ripple bug on Android 12 when useCompatPadding = true.
+        // @see https://github.com/material-components/material-components-android/issues/2617
+        mainFab.apply {
+            updateLayoutParams<MarginLayoutParams> {
+                setMargins(context.getDimenPixels(R.dimen.spacing_medium))
+            }
+            useCompatPadding = false
+        }
+        val context = context
+        mainFabClosedBackgroundColor =
+            context
+                .getAttrColorCompat(com.google.android.material.R.attr.colorPrimaryContainer)
+                .defaultColor
+        mainFabClosedIconColor =
+            context
+                .getAttrColorCompat(com.google.android.material.R.attr.colorOnPrimaryContainer)
+                .defaultColor
+        mainFabOpenedBackgroundColor =
+            context.getAttrColorCompat(androidx.appcompat.R.attr.colorPrimary).defaultColor
+        mainFabOpenedIconColor =
+            context
+                .getAttrColorCompat(com.google.android.material.R.attr.colorOnPrimary)
+                .defaultColor
+
+        // Always use our own animation to fix the library issue that ripple is rotated as well.
+        val mainFabDrawable =
+            RotateDrawable().apply {
+                drawable = mainFab.drawable
+                toDegrees = mainFabAnimationRotateAngle
+            }
+        mainFabAnimationRotateAngle = 0f
+        setMainFabClosedDrawable(mainFabDrawable)
+        setOnChangeListener(
+            object : OnChangeListener {
+                override fun onMainActionSelected(): Boolean = false
+
+                override fun onToggleChanged(isOpen: Boolean) {
+                    mainFabAnimator?.cancel()
+                    mainFabAnimator =
+                        createMainFabAnimator(isOpen).apply {
+                            addListener(
+                                object : AnimatorListenerAdapter() {
+                                    override fun onAnimationEnd(animation: Animator) {
+                                        mainFabAnimator = null
+                                    }
+                                })
+                            start()
+                        }
+                    innerChangeListener?.invoke(isOpen)
+                }
+            })
+    }
+
+    private fun createMainFabAnimator(isOpen: Boolean): Animator =
+        AnimatorSet().apply {
+            playTogether(
+                ObjectAnimator.ofArgb(
+                    mainFab,
+                    VIEW_PROPERTY_BACKGROUND_TINT,
+                    if (isOpen) mainFabOpenedBackgroundColor else mainFabClosedBackgroundColor),
+                ObjectAnimator.ofArgb(
+                    mainFab,
+                    IMAGE_VIEW_PROPERTY_IMAGE_TINT,
+                    if (isOpen) mainFabOpenedIconColor else mainFabClosedIconColor),
+                ObjectAnimator.ofInt(
+                    mainFab.drawable, DRAWABLE_PROPERTY_LEVEL, if (isOpen) 10000 else 0))
+            duration = 200
+            interpolator = FastOutSlowInInterpolator()
+        }
+
+    override fun onAttachedToWindow() {
+        super.onAttachedToWindow()
+
+        val overlayLayout = overlayLayout
+        if (overlayLayout != null) {
+            val surfaceColor =
+                context.getAttrColorCompat(com.google.android.material.R.attr.colorSurface)
+            val overlayColor = surfaceColor.defaultColor.withModulatedAlpha(0.87f)
+            overlayLayout.setBackgroundColor(overlayColor)
+        }
+    }
+
+    private fun Int.withModulatedAlpha(
+        @FloatRange(from = 0.0, to = 1.0) alphaModulation: Float
+    ): Int {
+        val alpha = (alpha * alphaModulation).roundToInt()
+        return ((alpha shl 24) or (this and 0x00FFFFFF))
+    }
+
+    override fun addActionItem(
+        actionItem: SpeedDialActionItem,
+        position: Int,
+        animate: Boolean
+    ): FabWithLabelView? {
+        val context = context
+        val fabImageTintColor = context.getAttrColorCompat(androidx.appcompat.R.attr.colorPrimary)
+        val fabBackgroundColor =
+            context.getAttrColorCompat(com.google.android.material.R.attr.colorSurface)
+        val labelColor = context.getAttrColorCompat(android.R.attr.textColorSecondary)
+        val labelBackgroundColor =
+            context.getAttrColorCompat(com.google.android.material.R.attr.colorSurface)
+        val labelElevation =
+            context.getDimen(com.google.android.material.R.dimen.m3_card_elevated_elevation)
+        val cornerRadius = context.getDimenPixels(R.dimen.spacing_medium)
+        val actionItem =
+            SpeedDialActionItem.Builder(
+                    actionItem.id,
+                    // Should not be a resource, pass null to fail fast.
+                    actionItem.getFabImageDrawable(null))
+                .setLabel(actionItem.getLabel(context))
+                .setFabImageTintColor(fabImageTintColor.defaultColor)
+                .setFabBackgroundColor(fabBackgroundColor.defaultColor)
+                .setLabelColor(labelColor.defaultColor)
+                .setLabelBackgroundColor(labelBackgroundColor.defaultColor)
+                .setLabelClickable(actionItem.isLabelClickable)
+                .setTheme(actionItem.theme)
+                .create()
+        return super.addActionItem(actionItem, position, animate)?.apply {
+            fab.apply {
+                updateLayoutParams<MarginLayoutParams> {
+                    val horizontalMargin = context.getDimenPixels(R.dimen.spacing_mid_large)
+                    setMargins(horizontalMargin, 0, horizontalMargin, 0)
+                }
+                useCompatPadding = false
+            }
+
+            labelBackground.apply {
+                useCompatPadding = false
+                setContentPadding(spacingSmall, spacingSmall, spacingSmall, spacingSmall)
+                background =
+                    MaterialShapeDrawable.createWithElevationOverlay(context).apply {
+                        fillColor = labelBackgroundColor
+                        elevation = labelElevation
+                        setCornerSize(cornerRadius.toFloat())
+                    }
+                foreground = null
+                (getChildAt(0) as TextView).apply {
+                    TextViewCompat.setTextAppearance(this, R.style.TextAppearance_Auxio_LabelLarge)
+                }
+            }
+        }
+    }
+
+    override fun onSaveInstanceState(): Parcelable {
+        val superState =
+            BundleCompat.getParcelable(
+                super.onSaveInstanceState() as Bundle, "superState", Parcelable::class.java)
+        return State(superState, isOpen)
+    }
+
+    override fun onRestoreInstanceState(state: Parcelable) {
+        state as State
+        super.onRestoreInstanceState(state.superState)
+        if (state.isOpen) {
+            toggle(false)
+        }
+    }
+
+    fun setChangeListener(listener: ((Boolean) -> Unit)?) {
+        innerChangeListener = listener
+    }
+
+    companion object {
+        private val VIEW_PROPERTY_BACKGROUND_TINT =
+            object : Property<View, Int>(Int::class.java, "backgroundTint") {
+                override fun get(view: View): Int? = view.backgroundTintList!!.defaultColor
+
+                override fun set(view: View, value: Int?) {
+                    view.backgroundTintList = ColorStateList.valueOf(value!!)
+                }
+            }
+
+        private val IMAGE_VIEW_PROPERTY_IMAGE_TINT =
+            object : Property<ImageView, Int>(Int::class.java, "imageTint") {
+                override fun get(view: ImageView): Int? = view.imageTintList!!.defaultColor
+
+                override fun set(view: ImageView, value: Int?) {
+                    view.imageTintList = ColorStateList.valueOf(value!!)
+                }
+            }
+
+        private val DRAWABLE_PROPERTY_LEVEL =
+            object : Property<Drawable, Int>(Int::class.java, "level") {
+                override fun get(drawable: Drawable): Int? = drawable.level
+
+                override fun set(drawable: Drawable, value: Int?) {
+                    drawable.level = value!!
+                }
+            }
+    }
+
+    @Parcelize private class State(val superState: Parcelable?, val isOpen: Boolean) : Parcelable
+}

app/src/main/java/org/oxycblt/auxio/image/CoverView.kt

@@ -73,7 +73,7 @@ import org.oxycblt.auxio.util.getInteger
  * @author Alexander Capehart (OxygenCobalt)
  */
 @AndroidEntryPoint
-class CoverView
+open class CoverView
 @JvmOverloads
 constructor(context: Context, attrs: AttributeSet? = null, @AttrRes defStyleAttr: Int = 0) :
     FrameLayout(context, attrs, defStyleAttr) {

app/src/main/java/org/oxycblt/auxio/list/menu/MenuDialogFragmentImpl.kt

@@ -178,7 +178,11 @@ class ArtistMenuDialogFragment : MenuDialogFragment<Menu.ForArtist>() {
         binding.menuInfo.text =
             getString(
                 R.string.fmt_two,
-                context.getPlural(R.plurals.fmt_album_count, menu.artist.albums.size),
+                if (menu.artist.explicitAlbums.isNotEmpty()) {
+                    context.getPlural(R.plurals.fmt_album_count, menu.artist.explicitAlbums.size)
+                } else {
+                    context.getString(R.string.def_album_count)
+                },
                 if (menu.artist.songs.isNotEmpty()) {
                     context.getPlural(R.plurals.fmt_song_count, menu.artist.songs.size)
                 } else {
@@ -284,6 +288,7 @@ class PlaylistMenuDialogFragment : MenuDialogFragment<Menu.ForPlaylist>() {
                 R.id.action_play_next,
                 R.id.action_queue_add,
                 R.id.action_playlist_add,
+                R.id.action_export,
                 R.id.action_share)
         } else {
             setOf()
@@ -316,6 +321,8 @@ class PlaylistMenuDialogFragment : MenuDialogFragment<Menu.ForPlaylist>() {
                 requireContext().showToast(R.string.lng_queue_added)
             }
             R.id.action_rename -> musicModel.renamePlaylist(menu.playlist)
+            R.id.action_import -> musicModel.importPlaylist(target = menu.playlist)
+            R.id.action_export -> musicModel.exportPlaylist(menu.playlist)
             R.id.action_delete -> musicModel.deletePlaylist(menu.playlist)
             R.id.action_share -> requireContext().share(menu.playlist)
             else -> error("Unexpected menu item $item")

app/src/main/java/org/oxycblt/auxio/list/recycler/ViewHolders.kt

@@ -164,7 +164,11 @@ class ArtistViewHolder private constructor(private val binding: ItemParentBindin
         binding.parentInfo.text =
             binding.context.getString(
                 R.string.fmt_two,
-                binding.context.getPlural(R.plurals.fmt_album_count, artist.albums.size),
+                if (artist.explicitAlbums.isNotEmpty()) {
+                    binding.context.getPlural(R.plurals.fmt_album_count, artist.explicitAlbums.size)
+                } else {
+                    binding.context.getString(R.string.def_album_count)
+                },
                 if (artist.songs.isNotEmpty()) {
                     binding.context.getPlural(R.plurals.fmt_song_count, artist.songs.size)
                 } else {
@@ -199,7 +203,7 @@ class ArtistViewHolder private constructor(private val binding: ItemParentBindin
             object : SimpleDiffCallback<Artist>() {
                 override fun areContentsTheSame(oldItem: Artist, newItem: Artist) =
                     oldItem.name == newItem.name &&
-                        oldItem.albums.size == newItem.albums.size &&
+                        oldItem.explicitAlbums.size == newItem.explicitAlbums.size &&
                         oldItem.songs.size == newItem.songs.size
             }
     }

app/src/main/java/org/oxycblt/auxio/music/Music.kt

@@ -317,12 +317,6 @@ interface Album : MusicParent {
  * @author Alexander Capehart (OxygenCobalt)
  */
 interface Artist : MusicParent {
-    /**
-     * All of the [Album]s this artist is credited to from [explicitAlbums] and [implicitAlbums].
-     * Note that any [Song] credited to this artist will have it's [Album] considered to be
-     * "indirectly" linked to this [Artist], and thus included in this list.
-     */
-    val albums: Collection<Album>
     /** Albums directly credited to this [Artist] via a "Album Artist" tag. */
     val explicitAlbums: Collection<Album>
     /** Albums indirectly credited to this [Artist] via an "Artist" tag. */
@@ -354,6 +348,7 @@ interface Genre : MusicParent {
  * @author Alexander Capehart (OxygenCobalt)
  */
 interface Playlist : MusicParent {
+    override val name: Name.Known
     override val songs: List<Song>
     /** The total duration of the songs in this genre, in milliseconds. */
     val durationMs: Long

app/src/main/java/org/oxycblt/auxio/music/MusicRepository.kt

@@ -31,14 +31,18 @@ import kotlinx.coroutines.async
 import kotlinx.coroutines.channels.Channel
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
+import kotlinx.coroutines.withTimeout
 import kotlinx.coroutines.yield
 import org.oxycblt.auxio.music.cache.CacheRepository
 import org.oxycblt.auxio.music.device.DeviceLibrary
 import org.oxycblt.auxio.music.device.RawSong
 import org.oxycblt.auxio.music.fs.MediaStoreExtractor
+import org.oxycblt.auxio.music.info.Name
+import org.oxycblt.auxio.music.metadata.Separators
 import org.oxycblt.auxio.music.metadata.TagExtractor
 import org.oxycblt.auxio.music.user.MutableUserLibrary
 import org.oxycblt.auxio.music.user.UserLibrary
+import org.oxycblt.auxio.util.forEachWithTimeout
 import org.oxycblt.auxio.util.logD
 import org.oxycblt.auxio.util.logE
 import org.oxycblt.auxio.util.logW
@@ -223,7 +227,8 @@ constructor(
     private val mediaStoreExtractor: MediaStoreExtractor,
     private val tagExtractor: TagExtractor,
     private val deviceLibraryFactory: DeviceLibrary.Factory,
-    private val userLibraryFactory: UserLibrary.Factory
+    private val userLibraryFactory: UserLibrary.Factory,
+    private val musicSettings: MusicSettings
 ) : MusicRepository {
     private val updateListeners = mutableListOf<MusicRepository.UpdateListener>()
     private val indexingListeners = mutableListOf<MusicRepository.IndexingListener>()
@@ -337,11 +342,11 @@ constructor(
     }
 
     override fun index(worker: MusicRepository.IndexingWorker, withCache: Boolean) =
-        worker.scope.launch { indexWrapper(worker, withCache) }
+        worker.scope.launch { indexWrapper(worker.context, this, withCache) }
 
-    private suspend fun indexWrapper(worker: MusicRepository.IndexingWorker, withCache: Boolean) {
+    private suspend fun indexWrapper(context: Context, scope: CoroutineScope, withCache: Boolean) {
         try {
-            indexImpl(worker, withCache)
+            indexImpl(context, scope, withCache)
         } catch (e: CancellationException) {
             // Got cancelled, propagate upwards to top-level co-routine.
             logD("Loading routine was cancelled")
@@ -355,16 +360,29 @@ constructor(
         }
     }
 
-    private suspend fun indexImpl(worker: MusicRepository.IndexingWorker, withCache: Boolean) {
+    private suspend fun indexImpl(context: Context, scope: CoroutineScope, withCache: Boolean) {
+        // TODO: Find a way to break up this monster of a method, preferably as another class.
+
         val start = System.currentTimeMillis()
         // Make sure we have permissions before going forward. Theoretically this would be better
         // done at the UI level, but that intertwines logic and display too much.
-        if (ContextCompat.checkSelfPermission(worker.context, PERMISSION_READ_AUDIO) ==
+        if (ContextCompat.checkSelfPermission(context, PERMISSION_READ_AUDIO) ==
             PackageManager.PERMISSION_DENIED) {
             logE("Permissions were not granted")
             throw NoAudioPermissionException()
         }
 
+        // Obtain configuration information
+        val constraints =
+            MediaStoreExtractor.Constraints(musicSettings.excludeNonMusic, musicSettings.musicDirs)
+        val separators = Separators.from(musicSettings.separators)
+        val nameFactory =
+            if (musicSettings.intelligentSorting) {
+                Name.Known.IntelligentFactory
+            } else {
+                Name.Known.SimpleFactory
+            }
+
         // Begin with querying MediaStore and the music cache. The former is needed for Auxio
         // to figure out what songs are (probably) on the device, and the latter will be needed
         // for discovery (described later). These have no shared state, so they are done in
@@ -373,10 +391,10 @@ constructor(
         emitIndexingProgress(IndexingProgress.Indeterminate)
 
         val mediaStoreQueryJob =
-            worker.scope.async {
+            scope.async {
                 val query =
                     try {
-                        mediaStoreExtractor.query()
+                        mediaStoreExtractor.query(constraints)
                     } catch (e: Exception) {
                         // Normally, errors in an async call immediately bubble up to the Looper
                         // and crash the app. Thus, we have to wrap any error into a Result
@@ -411,14 +429,15 @@ constructor(
         // does not exist. In the latter situation, it also applies it's own (inferior) metadata.
         logD("Starting MediaStore discovery")
         val mediaStoreJob =
-            worker.scope.async {
+            scope.async {
                 try {
                     mediaStoreExtractor.consume(query, cache, incompleteSongs, completeSongs)
                 } catch (e: Exception) {
                     // To prevent a deadlock, we want to close the channel with an exception
                     // to cascade to and cancel all other routines before finally bubbling up
                     // to the main extractor loop.
-                    incompleteSongs.close(e)
+                    logE("MediaStore extraction failed: $e")
+                    incompleteSongs.close(Exception("MediaStore extraction failed: $e"))
                     return@async
                 }
                 incompleteSongs.close()
@@ -428,11 +447,12 @@ constructor(
         // metadata for them, and then forwards it to DeviceLibrary.
         logD("Starting tag extraction")
         val tagJob =
-            worker.scope.async {
+            scope.async {
                 try {
                     tagExtractor.consume(incompleteSongs, completeSongs)
                 } catch (e: Exception) {
-                    completeSongs.close(e)
+                    logE("Tag extraction failed: $e")
+                    completeSongs.close(Exception("Tag extraction failed: $e"))
                     return@async
                 }
                 completeSongs.close()
@@ -442,12 +462,14 @@ constructor(
         // and then forwards them to the primary loading loop.
         logD("Starting DeviceLibrary creation")
         val deviceLibraryJob =
-            worker.scope.async(Dispatchers.Default) {
+            scope.async(Dispatchers.Default) {
                 val deviceLibrary =
                     try {
-                        deviceLibraryFactory.create(completeSongs, processedSongs)
+                        deviceLibraryFactory.create(
+                            completeSongs, processedSongs, separators, nameFactory)
                     } catch (e: Exception) {
-                        processedSongs.close(e)
+                        logE("DeviceLibrary creation failed: $e")
+                        processedSongs.close(Exception("DeviceLibrary creation failed: $e"))
                         return@async Result.failure(e)
                     }
                 processedSongs.close()
@@ -457,19 +479,20 @@ constructor(
         // We could keep track of a total here, but we also need to collate this RawSong information
         // for when we write the cache later on in the finalization step.
         val rawSongs = LinkedList<RawSong>()
-        for (rawSong in processedSongs) {
-            rawSongs.add(rawSong)
+        // Use a longer timeout so that dependent components can timeout and throw errors that
+        // provide more context than if we timed out here.
+        processedSongs.forEachWithTimeout(20000) {
+            rawSongs.add(it)
             // Since discovery takes up the bulk of the music loading process, we switch to
             // indicating a defined amount of loaded songs in comparison to the projected amount
             // of songs that were queried.
             emitIndexingProgress(IndexingProgress.Songs(rawSongs.size, query.projectedTotal))
         }
 
-        // This shouldn't occur, but keep them around just in case there's a regression.
-        // Note that DeviceLibrary might still actually be doing work (specifically parent
-        // processing), so we don't check if it's deadlocked.
-        check(!mediaStoreJob.isActive) { "MediaStore discovery is deadlocked" }
-        check(!tagJob.isActive) { "Tag extraction is deadlocked" }
+        withTimeout(10000) {
+            mediaStoreJob.await()
+            tagJob.await()
+        }
 
         // Deliberately done after the involved initialization step to make it less likely
         // that the short-circuit occurs so quickly as to break the UI.
@@ -493,7 +516,7 @@ constructor(
         // working on parent information.
         logD("Starting UserLibrary query")
         val userLibraryQueryJob =
-            worker.scope.async {
+            scope.async {
                 val rawPlaylists =
                     try {
                         userLibraryFactory.query()
@@ -518,7 +541,7 @@ constructor(
         logD("Awaiting DeviceLibrary creation")
         val deviceLibrary = deviceLibraryJob.await().getOrThrow()
         logD("Starting UserLibrary creation")
-        val userLibrary = userLibraryFactory.create(rawPlaylists, deviceLibrary)
+        val userLibrary = userLibraryFactory.create(rawPlaylists, deviceLibrary, nameFactory)
 
         // Loading process is functionally done, indicate such
         logD(

app/src/main/java/org/oxycblt/auxio/music/MusicSettings.kt

@@ -24,8 +24,8 @@ import androidx.core.content.edit
 import dagger.hilt.android.qualifiers.ApplicationContext
 import javax.inject.Inject
 import org.oxycblt.auxio.R
-import org.oxycblt.auxio.music.fs.Directory
-import org.oxycblt.auxio.music.fs.MusicDirectories
+import org.oxycblt.auxio.music.dirs.MusicDirectories
+import org.oxycblt.auxio.music.fs.DocumentPathFactory
 import org.oxycblt.auxio.settings.Settings
 import org.oxycblt.auxio.util.getSystemServiceCompat
 import org.oxycblt.auxio.util.logD
@@ -55,7 +55,9 @@ interface MusicSettings : Settings<MusicSettings.Listener> {
     }
 }
 
-class MusicSettingsImpl @Inject constructor(@ApplicationContext context: Context) :
+class MusicSettingsImpl
+@Inject
+constructor(@ApplicationContext context: Context, val documentPathFactory: DocumentPathFactory) :
     Settings.Impl<MusicSettings.Listener>(context), MusicSettings {
     private val storageManager = context.getSystemServiceCompat(StorageManager::class)
 
@@ -64,7 +66,7 @@ class MusicSettingsImpl @Inject constructor(@ApplicationContext context: Context
             val dirs =
                 (sharedPreferences.getStringSet(getString(R.string.set_key_music_dirs), null)
                         ?: emptySet())
-                    .mapNotNull { Directory.fromDocumentTreeUri(storageManager, it) }
+                    .mapNotNull(documentPathFactory::fromDocumentId)
             return MusicDirectories(
                 dirs,
                 sharedPreferences.getBoolean(getString(R.string.set_key_music_dirs_include), false))
@@ -73,7 +75,7 @@ class MusicSettingsImpl @Inject constructor(@ApplicationContext context: Context
             sharedPreferences.edit {
                 putStringSet(
                     getString(R.string.set_key_music_dirs),
-                    value.dirs.map(Directory::toDocumentTreeUri).toSet())
+                    value.dirs.map(documentPathFactory::toDocumentId).toSet())
                 putBoolean(getString(R.string.set_key_music_dirs_include), value.shouldInclude)
                 apply()
             }

app/src/main/java/org/oxycblt/auxio/music/MusicViewModel.kt

@@ -18,6 +18,7 @@
  
 package org.oxycblt.auxio.music
 
+import android.net.Uri
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import dagger.hilt.android.lifecycle.HiltViewModel
@@ -26,10 +27,14 @@ import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.launch
+import org.oxycblt.auxio.R
 import org.oxycblt.auxio.list.ListSettings
+import org.oxycblt.auxio.music.external.ExportConfig
+import org.oxycblt.auxio.music.external.ExternalPlaylistManager
 import org.oxycblt.auxio.util.Event
 import org.oxycblt.auxio.util.MutableEvent
 import org.oxycblt.auxio.util.logD
+import org.oxycblt.auxio.util.logE
 
 /**
  * A [ViewModel] providing data specific to the music loading process.
@@ -42,18 +47,22 @@ class MusicViewModel
 constructor(
     private val listSettings: ListSettings,
     private val musicRepository: MusicRepository,
+    private val externalPlaylistManager: ExternalPlaylistManager
 ) : ViewModel(), MusicRepository.UpdateListener, MusicRepository.IndexingListener {
 
     private val _indexingState = MutableStateFlow<IndexingState?>(null)
+
     /** The current music loading state, or null if no loading is going on. */
     val indexingState: StateFlow<IndexingState?> = _indexingState
 
     private val _statistics = MutableStateFlow<Statistics?>(null)
+
     /** [Statistics] about the last completed music load. */
     val statistics: StateFlow<Statistics?>
         get() = _statistics
 
     private val _playlistDecision = MutableEvent<PlaylistDecision>()
+
     /**
      * A [PlaylistDecision] command that is awaiting a view capable of responding to it. Null if
      * none currently.
@@ -61,6 +70,10 @@ constructor(
     val playlistDecision: Event<PlaylistDecision>
         get() = _playlistDecision
 
+    private val _playlistMessage = MutableEvent<PlaylistMessage>()
+    val playlistMessage: Event<PlaylistMessage>
+        get() = _playlistMessage
+
     init {
         musicRepository.addUpdateListener(this)
         musicRepository.addIndexingListener(this)
@@ -105,14 +118,103 @@ constructor(
      *
      * @param name The name of the new [Playlist]. If null, the user will be prompted for one.
      * @param songs The [Song]s to be contained in the new playlist.
+     * @param reason The reason why a new playlist is being created. For all intensive purposes, you
+     *   do not need to specify this.
      */
-    fun createPlaylist(name: String? = null, songs: List<Song> = listOf()) {
+    fun createPlaylist(
+        name: String? = null,
+        songs: List<Song> = listOf(),
+        reason: PlaylistDecision.New.Reason = PlaylistDecision.New.Reason.NEW
+    ) {
         if (name != null) {
             logD("Creating $name with ${songs.size} songs]")
-            viewModelScope.launch(Dispatchers.IO) { musicRepository.createPlaylist(name, songs) }
+            viewModelScope.launch(Dispatchers.IO) {
+                musicRepository.createPlaylist(name, songs)
+                val message =
+                    when (reason) {
+                        PlaylistDecision.New.Reason.NEW -> PlaylistMessage.NewPlaylistSuccess
+                        PlaylistDecision.New.Reason.ADD -> PlaylistMessage.AddSuccess
+                        PlaylistDecision.New.Reason.IMPORT -> PlaylistMessage.ImportSuccess
+                    }
+                _playlistMessage.put(message)
+            }
         } else {
             logD("Launching creation dialog for ${songs.size} songs")
-            _playlistDecision.put(PlaylistDecision.New(songs))
+            _playlistDecision.put(PlaylistDecision.New(songs, null, reason))
+        }
+    }
+
+    /**
+     * Import a playlist from a file [Uri]. Errors pushed to [playlistMessage].
+     *
+     * @param uri The [Uri] of the file to import. If null, the user will be prompted with a file
+     *   picker.
+     * @param target The [Playlist] to import to. If null, a new playlist will be created. Note the
+     *   [Playlist] will not be renamed to the name of the imported playlist.
+     * @see ExternalPlaylistManager
+     */
+    fun importPlaylist(uri: Uri? = null, target: Playlist? = null) {
+        if (uri != null) {
+            viewModelScope.launch(Dispatchers.IO) {
+                val importedPlaylist = externalPlaylistManager.import(uri)
+                if (importedPlaylist == null) {
+                    logE("Could not import playlist")
+                    _playlistMessage.put(PlaylistMessage.ImportFailed)
+                    return@launch
+                }
+
+                val deviceLibrary = musicRepository.deviceLibrary ?: return@launch
+                val songs = importedPlaylist.paths.mapNotNull(deviceLibrary::findSongByPath)
+
+                if (songs.isEmpty()) {
+                    logE("No songs found")
+                    _playlistMessage.put(PlaylistMessage.ImportFailed)
+                    return@launch
+                }
+
+                if (target !== null) {
+                    if (importedPlaylist.name != null && importedPlaylist.name != target.name.raw) {
+                        _playlistDecision.put(
+                            PlaylistDecision.Rename(
+                                target,
+                                importedPlaylist.name,
+                                songs,
+                                PlaylistDecision.Rename.Reason.IMPORT))
+                    } else {
+                        musicRepository.rewritePlaylist(target, songs)
+                        _playlistMessage.put(PlaylistMessage.ImportSuccess)
+                    }
+                } else {
+                    _playlistDecision.put(
+                        PlaylistDecision.New(
+                            songs, importedPlaylist.name, PlaylistDecision.New.Reason.IMPORT))
+                }
+            }
+        } else {
+            logD("Launching import picker")
+            _playlistDecision.put(PlaylistDecision.Import(target))
+        }
+    }
+
+    /**
+     * Export a [Playlist] to a file [Uri]. Errors pushed to [playlistMessage].
+     *
+     * @param playlist The [Playlist] to export.
+     * @param uri The [Uri] to export to. If null, the user will be prompted for one.
+     */
+    fun exportPlaylist(playlist: Playlist, uri: Uri? = null, config: ExportConfig? = null) {
+        if (uri != null && config != null) {
+            logD("Exporting playlist to $uri")
+            viewModelScope.launch(Dispatchers.IO) {
+                if (externalPlaylistManager.export(playlist, uri, config)) {
+                    _playlistMessage.put(PlaylistMessage.ExportSuccess)
+                } else {
+                    _playlistMessage.put(PlaylistMessage.ExportFailed)
+                }
+            }
+        } else {
+            logD("Launching export dialog")
+            _playlistDecision.put(PlaylistDecision.Export(playlist))
         }
     }
 
@@ -121,14 +223,34 @@ constructor(
      *
      * @param playlist The [Playlist] to rename,
      * @param name The new name of the [Playlist]. If null, the user will be prompted for a name.
+     * @param applySongs The songs to apply to the playlist after renaming. If empty, no songs will
+     *   be applied. This argument is internal and does not need to be specified in normal use.
+     * @param reason The reason why the playlist is being renamed. This argument is internal and
+     *   does not need to be specified in normal use.
      */
-    fun renamePlaylist(playlist: Playlist, name: String? = null) {
+    fun renamePlaylist(
+        playlist: Playlist,
+        name: String? = null,
+        applySongs: List<Song> = listOf(),
+        reason: PlaylistDecision.Rename.Reason = PlaylistDecision.Rename.Reason.ACTION
+    ) {
         if (name != null) {
             logD("Renaming $playlist to $name")
-            viewModelScope.launch(Dispatchers.IO) { musicRepository.renamePlaylist(playlist, name) }
+            viewModelScope.launch(Dispatchers.IO) {
+                musicRepository.renamePlaylist(playlist, name)
+                if (applySongs.isNotEmpty()) {
+                    musicRepository.rewritePlaylist(playlist, applySongs)
+                }
+                val message =
+                    when (reason) {
+                        PlaylistDecision.Rename.Reason.ACTION -> PlaylistMessage.RenameSuccess
+                        PlaylistDecision.Rename.Reason.IMPORT -> PlaylistMessage.ImportSuccess
+                    }
+                _playlistMessage.put(message)
+            }
         } else {
             logD("Launching rename dialog for $playlist")
-            _playlistDecision.put(PlaylistDecision.Rename(playlist))
+            _playlistDecision.put(PlaylistDecision.Rename(playlist, null, applySongs, reason))
         }
     }
 
@@ -137,12 +259,16 @@ constructor(
      *
      * @param playlist The playlist to delete.
      * @param rude Whether to immediately delete the playlist or prompt the user first. This should
-     *   be false at almost all times.
+     *   be false at almost all times. This argument is internal and does not need to be specified
+     *   in normal use.
      */
     fun deletePlaylist(playlist: Playlist, rude: Boolean = false) {
         if (rude) {
             logD("Deleting $playlist")
-            viewModelScope.launch(Dispatchers.IO) { musicRepository.deletePlaylist(playlist) }
+            viewModelScope.launch(Dispatchers.IO) {
+                musicRepository.deletePlaylist(playlist)
+                _playlistMessage.put(PlaylistMessage.DeleteSuccess)
+            }
         } else {
             logD("Launching deletion dialog for $playlist")
             _playlistDecision.put(PlaylistDecision.Delete(playlist))
@@ -202,7 +328,10 @@ constructor(
     fun addToPlaylist(songs: List<Song>, playlist: Playlist? = null) {
         if (playlist != null) {
             logD("Adding ${songs.size} songs to $playlist")
-            viewModelScope.launch(Dispatchers.IO) { musicRepository.addToPlaylist(songs, playlist) }
+            viewModelScope.launch(Dispatchers.IO) {
+                musicRepository.addToPlaylist(songs, playlist)
+                _playlistMessage.put(PlaylistMessage.AddSuccess)
+            }
         } else {
             logD("Launching addition dialog for songs=${songs.size}")
             _playlistDecision.put(PlaylistDecision.Add(songs))
@@ -237,15 +366,50 @@ sealed interface PlaylistDecision {
      * Navigate to a dialog that allows a user to pick a name for a new [Playlist].
      *
      * @param songs The [Song]s to contain in the new [Playlist].
+     * @param template An existing playlist name that should be editable in the opened dialog. If
+     *   null, a placeholder should be created and shown as a hint instead.
+     * @param context The context in which this decision is being fulfilled.
      */
-    data class New(val songs: List<Song>) : PlaylistDecision
+    data class New(val songs: List<Song>, val template: String?, val reason: Reason) :
+        PlaylistDecision {
+        enum class Reason {
+            NEW,
+            ADD,
+            IMPORT
+        }
+    }
+
+    /**
+     * Navigate to a file picker to import a playlist from.
+     *
+     * @param target The [Playlist] to import to. If null, then the file imported will create a new
+     *   playlist.
+     */
+    data class Import(val target: Playlist?) : PlaylistDecision
 
     /**
      * Navigate to a dialog that allows a user to rename an existing [Playlist].
      *
      * @param playlist The playlist to act on.
      */
-    data class Rename(val playlist: Playlist) : PlaylistDecision
+    data class Rename(
+        val playlist: Playlist,
+        val template: String?,
+        val applySongs: List<Song>,
+        val reason: Reason
+    ) : PlaylistDecision {
+        enum class Reason {
+            ACTION,
+            IMPORT
+        }
+    }
+
+    /**
+     * Navigate to a dialog that allows the user to export a [Playlist].
+     *
+     * @param playlist The [Playlist] to export.
+     */
+    data class Export(val playlist: Playlist) : PlaylistDecision
 
     /**
      * Navigate to a dialog that confirms the deletion of an existing [Playlist].
@@ -261,3 +425,47 @@ sealed interface PlaylistDecision {
      */
     data class Add(val songs: List<Song>) : PlaylistDecision
 }
+
+sealed interface PlaylistMessage {
+    val stringRes: Int
+
+    data object NewPlaylistSuccess : PlaylistMessage {
+        override val stringRes: Int
+            get() = R.string.lng_playlist_created
+    }
+
+    data object ImportSuccess : PlaylistMessage {
+        override val stringRes: Int
+            get() = R.string.lng_playlist_imported
+    }
+
+    data object ImportFailed : PlaylistMessage {
+        override val stringRes: Int
+            get() = R.string.err_import_failed
+    }
+
+    data object RenameSuccess : PlaylistMessage {
+        override val stringRes: Int
+            get() = R.string.lng_playlist_renamed
+    }
+
+    data object DeleteSuccess : PlaylistMessage {
+        override val stringRes: Int
+            get() = R.string.lng_playlist_deleted
+    }
+
+    data object AddSuccess : PlaylistMessage {
+        override val stringRes: Int
+            get() = R.string.lng_playlist_added
+    }
+
+    data object ExportSuccess : PlaylistMessage {
+        override val stringRes: Int
+            get() = R.string.lng_playlist_exported
+    }
+
+    data object ExportFailed : PlaylistMessage {
+        override val stringRes: Int
+            get() = R.string.err_export_failed
+    }
+}

app/src/main/java/org/oxycblt/auxio/music/decision/AddToPlaylistDialog.kt

@@ -32,12 +32,12 @@ import org.oxycblt.auxio.R
 import org.oxycblt.auxio.databinding.DialogMusicChoicesBinding
 import org.oxycblt.auxio.list.ClickableListListener
 import org.oxycblt.auxio.music.MusicViewModel
+import org.oxycblt.auxio.music.PlaylistDecision
 import org.oxycblt.auxio.music.Song
 import org.oxycblt.auxio.ui.ViewBindingMaterialDialogFragment
 import org.oxycblt.auxio.util.collectImmediately
 import org.oxycblt.auxio.util.logD
 import org.oxycblt.auxio.util.navigateSafe
-import org.oxycblt.auxio.util.showToast
 
 /**
  * A dialog that allows the user to pick a specific playlist to add song(s) to.
@@ -86,7 +86,6 @@ class AddToPlaylistDialog :
 
     override fun onClick(item: PlaylistChoice, viewHolder: RecyclerView.ViewHolder) {
         musicModel.addToPlaylist(pickerModel.currentSongsToAdd.value ?: return, item.playlist)
-        requireContext().showToast(R.string.lng_playlist_added)
         findNavController().navigateUp()
     }
 
@@ -100,7 +99,8 @@ class AddToPlaylistDialog :
         val songs = pickerModel.currentSongsToAdd.value ?: return
         findNavController()
             .navigateSafe(
-                AddToPlaylistDialogDirections.newPlaylist(songs.map { it.uid }.toTypedArray()))
+                AddToPlaylistDialogDirections.newPlaylist(
+                    songs.map { it.uid }.toTypedArray(), null, PlaylistDecision.New.Reason.ADD))
     }
 
     private fun updatePendingSongs(songs: List<Song>?) {

app/src/main/java/org/oxycblt/auxio/music/decision/DeletePlaylistDialog.kt

@@ -33,7 +33,6 @@ import org.oxycblt.auxio.music.Playlist
 import org.oxycblt.auxio.ui.ViewBindingMaterialDialogFragment
 import org.oxycblt.auxio.util.collectImmediately
 import org.oxycblt.auxio.util.logD
-import org.oxycblt.auxio.util.showToast
 import org.oxycblt.auxio.util.unlikelyToBeNull
 
 /**
@@ -56,7 +55,6 @@ class DeletePlaylistDialog : ViewBindingMaterialDialogFragment<DialogDeletePlayl
                 // Now we can delete the playlist for-real this time.
                 musicModel.deletePlaylist(
                     unlikelyToBeNull(pickerModel.currentPlaylistToDelete.value), rude = true)
-                requireContext().showToast(R.string.lng_playlist_deleted)
             }
             .setNegativeButton(R.string.lbl_cancel, null)
     }

app/src/main/java/org/oxycblt/auxio/music/decision/ExportPlaylistDialog.kt

@@ -0,0 +1,153 @@
+/*
+ * Copyright (c) 2023 Auxio Project
+ * ExportPlaylistDialog.kt is part of Auxio.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
+package org.oxycblt.auxio.music.decision
+
+import android.os.Bundle
+import android.view.LayoutInflater
+import androidx.activity.result.ActivityResultLauncher
+import androidx.activity.result.contract.ActivityResultContracts
+import androidx.appcompat.app.AlertDialog
+import androidx.fragment.app.activityViewModels
+import androidx.fragment.app.viewModels
+import androidx.navigation.fragment.findNavController
+import androidx.navigation.fragment.navArgs
+import dagger.hilt.android.AndroidEntryPoint
+import org.oxycblt.auxio.R
+import org.oxycblt.auxio.databinding.DialogPlaylistExportBinding
+import org.oxycblt.auxio.music.MusicViewModel
+import org.oxycblt.auxio.music.Playlist
+import org.oxycblt.auxio.music.external.ExportConfig
+import org.oxycblt.auxio.music.external.M3U
+import org.oxycblt.auxio.ui.ViewBindingMaterialDialogFragment
+import org.oxycblt.auxio.util.collectImmediately
+import org.oxycblt.auxio.util.logD
+import org.oxycblt.auxio.util.logW
+import org.oxycblt.auxio.util.unlikelyToBeNull
+
+/**
+ * A dialog that allows the user to configure how a playlist will be exported to a file.
+ *
+ * @author Alexander Capehart (OxygenCobalt)
+ */
+@AndroidEntryPoint
+class ExportPlaylistDialog : ViewBindingMaterialDialogFragment<DialogPlaylistExportBinding>() {
+    private val musicModel: MusicViewModel by activityViewModels()
+    private val pickerModel: PlaylistPickerViewModel by viewModels()
+    private var createDocumentLauncher: ActivityResultLauncher<String>? = null
+    // Information about what playlist to name for is initially within the navigation arguments
+    // as UIDs, as that is the only safe way to parcel playlist information.
+    private val args: ExportPlaylistDialogArgs by navArgs()
+
+    override fun onConfigDialog(builder: AlertDialog.Builder) {
+        builder
+            .setTitle(R.string.lbl_export_playlist)
+            .setPositiveButton(R.string.lbl_export, null)
+            .setNegativeButton(R.string.lbl_cancel, null)
+    }
+
+    override fun onCreateBinding(inflater: LayoutInflater) =
+        DialogPlaylistExportBinding.inflate(inflater)
+
+    override fun onBindingCreated(
+        binding: DialogPlaylistExportBinding,
+        savedInstanceState: Bundle?
+    ) {
+        // --- UI SETUP ---
+        createDocumentLauncher =
+            registerForActivityResult(ActivityResultContracts.CreateDocument(M3U.MIME_TYPE)) { uri
+                ->
+                if (uri == null) {
+                    logW("No URI returned from file picker")
+                    return@registerForActivityResult
+                }
+
+                val playlist = pickerModel.currentPlaylistToExport.value
+                if (playlist == null) {
+                    logW("No playlist to export")
+                    findNavController().navigateUp()
+                    return@registerForActivityResult
+                }
+
+                logD("Received playlist URI $uri")
+                musicModel.exportPlaylist(playlist, uri, pickerModel.currentExportConfig.value)
+                findNavController().navigateUp()
+            }
+
+        binding.exportPathsGroup.addOnButtonCheckedListener { group, checkedId, isChecked ->
+            if (!isChecked) return@addOnButtonCheckedListener
+            val current = pickerModel.currentExportConfig.value
+            pickerModel.setExportConfig(
+                current.copy(absolute = checkedId == R.id.export_absolute_paths))
+        }
+
+        binding.exportWindowsPaths.setOnClickListener { _ ->
+            val current = pickerModel.currentExportConfig.value
+            pickerModel.setExportConfig(current.copy(windowsPaths = !current.windowsPaths))
+        }
+
+        // --- VIEWMODEL SETUP ---
+        musicModel.playlistDecision.consume()
+        pickerModel.setPlaylistToExport(args.playlistUid)
+        collectImmediately(pickerModel.currentPlaylistToExport, ::updatePlaylistToExport)
+        collectImmediately(pickerModel.currentExportConfig, ::updateExportConfig)
+    }
+
+    override fun onStart() {
+        super.onStart()
+        (requireDialog() as AlertDialog)
+            .getButton(AlertDialog.BUTTON_POSITIVE)
+            .setOnClickListener { _ ->
+                val pendingPlaylist = unlikelyToBeNull(pickerModel.currentPlaylistToExport.value)
+
+                val fileName =
+                    pendingPlaylist.name
+                        .resolve(requireContext())
+                        .replace(SAFE_FILE_NAME_REGEX, "_") + ".m3u"
+
+                requireNotNull(createDocumentLauncher) {
+                        "Create document launcher was not available"
+                    }
+                    .launch(fileName)
+            }
+    }
+
+    private fun updatePlaylistToExport(playlist: Playlist?) {
+        if (playlist == null) {
+            logD("No playlist to export, leaving")
+            findNavController().navigateUp()
+            return
+        }
+    }
+
+    private fun updateExportConfig(config: ExportConfig) {
+        val binding = requireBinding()
+        binding.exportPathsGroup.check(
+            if (config.absolute) {
+                R.id.export_absolute_paths
+            } else {
+                R.id.export_relative_paths
+            })
+        logD(config.windowsPaths)
+        binding.exportWindowsPaths.isChecked = config.windowsPaths
+    }
+
+    private companion object {
+        val SAFE_FILE_NAME_REGEX = Regex("[^a-zA-Z0-9.-]")
+    }
+}

app/src/main/java/org/oxycblt/auxio/music/decision/NewPlaylistDialog.kt

@@ -19,6 +19,7 @@
 package org.oxycblt.auxio.music.decision
 
 import android.os.Bundle
+import android.text.Editable
 import android.view.LayoutInflater
 import androidx.appcompat.app.AlertDialog
 import androidx.core.widget.addTextChangedListener
@@ -30,10 +31,10 @@ import dagger.hilt.android.AndroidEntryPoint
 import org.oxycblt.auxio.R
 import org.oxycblt.auxio.databinding.DialogPlaylistNameBinding
 import org.oxycblt.auxio.music.MusicViewModel
+import org.oxycblt.auxio.music.PlaylistDecision
 import org.oxycblt.auxio.ui.ViewBindingMaterialDialogFragment
 import org.oxycblt.auxio.util.collectImmediately
 import org.oxycblt.auxio.util.logD
-import org.oxycblt.auxio.util.showToast
 import org.oxycblt.auxio.util.unlikelyToBeNull
 
 /**
@@ -48,12 +49,18 @@ class NewPlaylistDialog : ViewBindingMaterialDialogFragment<DialogPlaylistNameBi
     // Information about what playlist to name for is initially within the navigation arguments
     // as UIDs, as that is the only safe way to parcel playlist information.
     private val args: NewPlaylistDialogArgs by navArgs()
+    private var initializedField = false
 
     override fun onConfigDialog(builder: AlertDialog.Builder) {
         builder
-            .setTitle(R.string.lbl_new_playlist)
+            .setTitle(
+                when (args.reason) {
+                    PlaylistDecision.New.Reason.NEW,
+                    PlaylistDecision.New.Reason.ADD -> R.string.lbl_new_playlist
+                    PlaylistDecision.New.Reason.IMPORT -> R.string.lbl_import_playlist
+                })
             .setPositiveButton(R.string.lbl_ok) { _, _ ->
-                val pendingPlaylist = unlikelyToBeNull(pickerModel.currentPendingPlaylist.value)
+                val pendingPlaylist = unlikelyToBeNull(pickerModel.currentPendingNewPlaylist.value)
                 val name =
                     when (val chosenName = pickerModel.chosenName.value) {
                         is ChosenName.Valid -> chosenName.value
@@ -61,8 +68,7 @@ class NewPlaylistDialog : ViewBindingMaterialDialogFragment<DialogPlaylistNameBi
                         else -> throw IllegalStateException()
                     }
                 // TODO: Navigate to playlist if there are songs in it
-                musicModel.createPlaylist(name, pendingPlaylist.songs)
-                requireContext().showToast(R.string.lng_playlist_created)
+                musicModel.createPlaylist(name, pendingPlaylist.songs, pendingPlaylist.reason)
                 findNavController().apply {
                     navigateUp()
                     // Do an additional navigation away from the playlist addition dialog, if
@@ -84,23 +90,37 @@ class NewPlaylistDialog : ViewBindingMaterialDialogFragment<DialogPlaylistNameBi
 
         // --- VIEWMODEL SETUP ---
         musicModel.playlistDecision.consume()
-        pickerModel.setPendingPlaylist(requireContext(), args.songUids)
-        collectImmediately(pickerModel.currentPendingPlaylist, ::updatePendingPlaylist)
+        pickerModel.setPendingPlaylist(requireContext(), args.songUids, args.template, args.reason)
+
+        collectImmediately(pickerModel.currentPendingNewPlaylist, ::updatePendingPlaylist)
         collectImmediately(pickerModel.chosenName, ::updateChosenName)
     }
 
-    private fun updatePendingPlaylist(pendingPlaylist: PendingPlaylist?) {
-        if (pendingPlaylist == null) {
+    private fun updatePendingPlaylist(pendingNewPlaylist: PendingNewPlaylist?) {
+        if (pendingNewPlaylist == null) {
             logD("No playlist to create, leaving")
             findNavController().navigateUp()
             return
         }
-
-        requireBinding().playlistName.hint = pendingPlaylist.preferredName
+        val binding = requireBinding()
+        if (pendingNewPlaylist.template != null) {
+            if (initializedField) return
+            initializedField = true
+            // Need to convert args.existingName to an Editable
+            if (args.template != null) {
+                binding.playlistName.text = EDITABLE_FACTORY.newEditable(args.template)
+            }
+        } else {
+            binding.playlistName.hint = pendingNewPlaylist.preferredName
+        }
     }
 
     private fun updateChosenName(chosenName: ChosenName) {
         (dialog as AlertDialog).getButton(AlertDialog.BUTTON_POSITIVE)?.isEnabled =
             chosenName is ChosenName.Valid || chosenName is ChosenName.Empty
     }
+
+    private companion object {
+        val EDITABLE_FACTORY: Editable.Factory = Editable.Factory.getInstance()
+    }
 }

app/src/main/java/org/oxycblt/auxio/music/decision/PlaylistPickerViewModel.kt

@@ -30,7 +30,9 @@ import org.oxycblt.auxio.list.sort.Sort
 import org.oxycblt.auxio.music.Music
 import org.oxycblt.auxio.music.MusicRepository
 import org.oxycblt.auxio.music.Playlist
+import org.oxycblt.auxio.music.PlaylistDecision
 import org.oxycblt.auxio.music.Song
+import org.oxycblt.auxio.music.external.ExportConfig
 import org.oxycblt.auxio.util.logD
 import org.oxycblt.auxio.util.logE
 import org.oxycblt.auxio.util.logW
@@ -43,15 +45,25 @@ import org.oxycblt.auxio.util.logW
 @HiltViewModel
 class PlaylistPickerViewModel @Inject constructor(private val musicRepository: MusicRepository) :
     ViewModel(), MusicRepository.UpdateListener {
-    private val _currentPendingPlaylist = MutableStateFlow<PendingPlaylist?>(null)
+    private val _currentPendingNewPlaylist = MutableStateFlow<PendingNewPlaylist?>(null)
     /** A new [Playlist] having it's name chosen by the user. Null if none yet. */
-    val currentPendingPlaylist: StateFlow<PendingPlaylist?>
-        get() = _currentPendingPlaylist
+    val currentPendingNewPlaylist: StateFlow<PendingNewPlaylist?>
+        get() = _currentPendingNewPlaylist
 
-    private val _currentPlaylistToRename = MutableStateFlow<Playlist?>(null)
+    private val _currentPendingRenamePlaylist = MutableStateFlow<PendingRenamePlaylist?>(null)
     /** An existing [Playlist] that is being renamed. Null if none yet. */
-    val currentPlaylistToRename: StateFlow<Playlist?>
-        get() = _currentPlaylistToRename
+    val currentPendingRenamePlaylist: StateFlow<PendingRenamePlaylist?>
+        get() = _currentPendingRenamePlaylist
+
+    private val _currentPlaylistToExport = MutableStateFlow<Playlist?>(null)
+    /** An existing [Playlist] that is being exported. Null if none yet. */
+    val currentPlaylistToExport: StateFlow<Playlist?>
+        get() = _currentPlaylistToExport
+
+    private val _currentExportConfig = MutableStateFlow(DEFAULT_EXPORT_CONFIG)
+    /** The current [ExportConfig] to use when exporting a playlist. */
+    val currentExportConfig: StateFlow<ExportConfig>
+        get() = _currentExportConfig
 
     private val _currentPlaylistToDelete = MutableStateFlow<Playlist?>(null)
     /** The current [Playlist] that needs it's deletion confirmed. Null if none yet. */
@@ -59,7 +71,7 @@ class PlaylistPickerViewModel @Inject constructor(private val musicRepository: M
         get() = _currentPlaylistToDelete
 
     private val _chosenName = MutableStateFlow<ChosenName>(ChosenName.Empty)
-    /** The users chosen name for [currentPendingPlaylist] or [currentPlaylistToRename]. */
+    /** The users chosen name for [currentPendingNewPlaylist] or [currentPendingRenamePlaylist]. */
     val chosenName: StateFlow<ChosenName>
         get() = _chosenName
 
@@ -81,13 +93,15 @@ class PlaylistPickerViewModel @Inject constructor(private val musicRepository: M
         var refreshChoicesWith: List<Song>? = null
         val deviceLibrary = musicRepository.deviceLibrary
         if (changes.deviceLibrary && deviceLibrary != null) {
-            _currentPendingPlaylist.value =
-                _currentPendingPlaylist.value?.let { pendingPlaylist ->
-                    PendingPlaylist(
+            _currentPendingNewPlaylist.value =
+                _currentPendingNewPlaylist.value?.let { pendingPlaylist ->
+                    PendingNewPlaylist(
                         pendingPlaylist.preferredName,
-                        pendingPlaylist.songs.mapNotNull { deviceLibrary.findSong(it.uid) })
+                        pendingPlaylist.songs.mapNotNull { deviceLibrary.findSong(it.uid) },
+                        pendingPlaylist.template,
+                        pendingPlaylist.reason)
                 }
-            logD("Updated pending playlist: ${_currentPendingPlaylist.value?.preferredName}")
+            logD("Updated pending playlist: ${_currentPendingNewPlaylist.value?.preferredName}")
 
             _currentSongsToAdd.value =
                 _currentSongsToAdd.value?.let { pendingSongs ->
@@ -110,6 +124,14 @@ class PlaylistPickerViewModel @Inject constructor(private val musicRepository: M
             }
             logD("Updated chosen name to $chosenName")
             refreshChoicesWith = refreshChoicesWith ?: _currentSongsToAdd.value
+
+            // TODO: Add music syncing for other playlist states here
+
+            _currentPlaylistToExport.value =
+                _currentPlaylistToExport.value?.let { playlist ->
+                    musicRepository.userLibrary?.findPlaylist(playlist.uid)
+                }
+            logD("Updated playlist to export to ${_currentPlaylistToExport.value}")
         }
 
         refreshChoicesWith?.let(::refreshPlaylistChoices)
@@ -120,12 +142,18 @@ class PlaylistPickerViewModel @Inject constructor(private val musicRepository: M
     }
 
     /**
-     * Set a new [currentPendingPlaylist] from a new batch of pending [Song] [Music.UID]s.
+     * Set a new [currentPendingNewPlaylist] from a new batch of pending [Song] [Music.UID]s.
      *
      * @param context [Context] required to generate a playlist name.
      * @param songUids The [Music.UID]s of songs to be present in the playlist.
+     * @param reason The reason the playlist is being created.
      */
-    fun setPendingPlaylist(context: Context, songUids: Array<Music.UID>) {
+    fun setPendingPlaylist(
+        context: Context,
+        songUids: Array<Music.UID>,
+        template: String?,
+        reason: PlaylistDecision.New.Reason
+    ) {
         logD("Opening ${songUids.size} songs to create a playlist from")
         val userLibrary = musicRepository.userLibrary ?: return
         val songs =
@@ -147,9 +175,9 @@ class PlaylistPickerViewModel @Inject constructor(private val musicRepository: M
                 possibleName
             }
 
-        _currentPendingPlaylist.value =
+        _currentPendingNewPlaylist.value =
             if (possibleName != null && songs != null) {
-                PendingPlaylist(possibleName, songs)
+                PendingNewPlaylist(possibleName, songs, template, reason)
             } else {
                 logW("Given song UIDs to create were invalid")
                 null
@@ -157,20 +185,59 @@ class PlaylistPickerViewModel @Inject constructor(private val musicRepository: M
     }
 
     /**
-     * Set a new [currentPlaylistToRename] from a [Playlist] [Music.UID].
+     * Set a new [currentPendingRenamePlaylist] from a [Playlist] [Music.UID].
      *
      * @param playlistUid The [Music.UID]s of the [Playlist] to rename.
      */
-    fun setPlaylistToRename(playlistUid: Music.UID) {
+    fun setPlaylistToRename(
+        playlistUid: Music.UID,
+        applySongUids: Array<Music.UID>,
+        template: String?,
+        reason: PlaylistDecision.Rename.Reason
+    ) {
         logD("Opening playlist $playlistUid to rename")
-        _currentPlaylistToRename.value = musicRepository.userLibrary?.findPlaylist(playlistUid)
-        if (_currentPlaylistToDelete.value == null) {
-            logW("Given playlist UID to rename was invalid")
+        val playlist = musicRepository.userLibrary?.findPlaylist(playlistUid)
+        val applySongs =
+            musicRepository.deviceLibrary?.let { applySongUids.mapNotNull(it::findSong) }
+
+        _currentPendingRenamePlaylist.value =
+            if (playlist != null && applySongs != null) {
+                PendingRenamePlaylist(playlist, applySongs, template, reason)
+            } else {
+                logW("Given playlist UID to rename was invalid")
+                null
+            }
+    }
+
+    /**
+     * Set a new [currentPlaylisttoExport] from a [Playlist] [Music.UID].
+     *
+     * @param playlistUid The [Music.UID] of the [Playlist] to export.
+     */
+    fun setPlaylistToExport(playlistUid: Music.UID) {
+        logD("Opening playlist $playlistUid to export")
+        // TODO: Add this guard to the rest of the methods here
+        if (_currentPlaylistToExport.value?.uid == playlistUid) return
+        _currentPlaylistToExport.value = musicRepository.userLibrary?.findPlaylist(playlistUid)
+        if (_currentPlaylistToExport.value == null) {
+            logW("Given playlist UID to export was invalid")
+        } else {
+            _currentExportConfig.value = DEFAULT_EXPORT_CONFIG
         }
     }
 
     /**
-     * Set a new [currentPendingPlaylist] from a new [Playlist] [Music.UID].
+     * Update [currentExportConfig] based on new user input.
+     *
+     * @param exportConfig The new [ExportConfig] to use.
+     */
+    fun setExportConfig(exportConfig: ExportConfig) {
+        logD("Setting export config to $exportConfig")
+        _currentExportConfig.value = exportConfig
+    }
+
+    /**
+     * Set a new [currentPendingNewPlaylist] from a new [Playlist] [Music.UID].
      *
      * @param playlistUid The [Music.UID] of the [Playlist] to delete.
      */
@@ -238,16 +305,33 @@ class PlaylistPickerViewModel @Inject constructor(private val musicRepository: M
                 PlaylistChoice(it, songs.all(songSet::contains))
             }
     }
+
+    private companion object {
+        private val DEFAULT_EXPORT_CONFIG = ExportConfig(absolute = false, windowsPaths = false)
+    }
 }
 
 /**
  * Represents a playlist that will be created as soon as a name is chosen.
  *
  * @param preferredName The name to be used by default if no other name is chosen.
- * @param songs The [Song]s to be contained in the [PendingPlaylist]
+ * @param songs The [Song]s to be contained in the [PendingNewPlaylist]
+ * @param reason The reason the playlist is being created.
  * @author Alexander Capehart (OxygenCobalt)
  */
-data class PendingPlaylist(val preferredName: String, val songs: List<Song>)
+data class PendingNewPlaylist(
+    val preferredName: String,
+    val songs: List<Song>,
+    val template: String?,
+    val reason: PlaylistDecision.New.Reason
+)
+
+data class PendingRenamePlaylist(
+    val playlist: Playlist,
+    val applySongs: List<Song>,
+    val template: String?,
+    val reason: PlaylistDecision.Rename.Reason
+)
 
 /**
  * Represents the (processed) user input from the playlist naming dialogs.

app/src/main/java/org/oxycblt/auxio/music/decision/RenamePlaylistDialog.kt

@@ -30,11 +30,9 @@ import dagger.hilt.android.AndroidEntryPoint
 import org.oxycblt.auxio.R
 import org.oxycblt.auxio.databinding.DialogPlaylistNameBinding
 import org.oxycblt.auxio.music.MusicViewModel
-import org.oxycblt.auxio.music.Playlist
 import org.oxycblt.auxio.ui.ViewBindingMaterialDialogFragment
 import org.oxycblt.auxio.util.collectImmediately
 import org.oxycblt.auxio.util.logD
-import org.oxycblt.auxio.util.showToast
 import org.oxycblt.auxio.util.unlikelyToBeNull
 
 /**
@@ -55,10 +53,14 @@ class RenamePlaylistDialog : ViewBindingMaterialDialogFragment<DialogPlaylistNam
         builder
             .setTitle(R.string.lbl_rename_playlist)
             .setPositiveButton(R.string.lbl_ok) { _, _ ->
-                val playlist = unlikelyToBeNull(pickerModel.currentPlaylistToRename.value)
+                val pendingRenamePlaylist =
+                    unlikelyToBeNull(pickerModel.currentPendingRenamePlaylist.value)
                 val chosenName = pickerModel.chosenName.value as ChosenName.Valid
-                musicModel.renamePlaylist(playlist, chosenName.value)
-                requireContext().showToast(R.string.lng_playlist_renamed)
+                musicModel.renamePlaylist(
+                    pendingRenamePlaylist.playlist,
+                    chosenName.value,
+                    pendingRenamePlaylist.applySongs,
+                    pendingRenamePlaylist.reason)
                 findNavController().navigateUp()
             }
             .setNegativeButton(R.string.lbl_cancel, null)
@@ -75,20 +77,23 @@ class RenamePlaylistDialog : ViewBindingMaterialDialogFragment<DialogPlaylistNam
 
         // --- VIEWMODEL SETUP ---
         musicModel.playlistDecision.consume()
-        pickerModel.setPlaylistToRename(args.playlistUid)
-        collectImmediately(pickerModel.currentPlaylistToRename, ::updatePlaylistToRename)
+        pickerModel.setPlaylistToRename(
+            args.playlistUid, args.applySongUids, args.template, args.reason)
+        collectImmediately(pickerModel.currentPendingRenamePlaylist, ::updatePlaylistToRename)
         collectImmediately(pickerModel.chosenName, ::updateChosenName)
     }
 
-    private fun updatePlaylistToRename(playlist: Playlist?) {
-        if (playlist == null) {
+    private fun updatePlaylistToRename(pendingRenamePlaylist: PendingRenamePlaylist?) {
+        if (pendingRenamePlaylist == null) {
             // Nothing to rename anymore.
             findNavController().navigateUp()
             return
         }
 
         if (!initializedField) {
-            val default = playlist.name.resolve(requireContext())
+            val default =
+                pendingRenamePlaylist.template
+                    ?: pendingRenamePlaylist.playlist.name.resolve(requireContext())
             logD("Name input is not initialized, setting to $default")
             requireBinding().playlistName.setText(default)
             initializedField = true

app/src/main/java/org/oxycblt/auxio/music/device/DeviceLibrary.kt

@@ -28,13 +28,15 @@ import org.oxycblt.auxio.music.Artist
 import org.oxycblt.auxio.music.Genre
 import org.oxycblt.auxio.music.Music
 import org.oxycblt.auxio.music.MusicRepository
-import org.oxycblt.auxio.music.MusicSettings
 import org.oxycblt.auxio.music.Song
+import org.oxycblt.auxio.music.fs.Path
 import org.oxycblt.auxio.music.fs.contentResolverSafe
 import org.oxycblt.auxio.music.fs.useQuery
 import org.oxycblt.auxio.music.info.Name
 import org.oxycblt.auxio.music.metadata.Separators
+import org.oxycblt.auxio.util.forEachWithTimeout
 import org.oxycblt.auxio.util.logW
+import org.oxycblt.auxio.util.sendWithTimeout
 import org.oxycblt.auxio.util.unlikelyToBeNull
 
 /**
@@ -73,6 +75,14 @@ interface DeviceLibrary {
      */
     fun findSongForUri(context: Context, uri: Uri): Song?
 
+    /**
+     * Find a [Song] instance corresponding to the given [Path].
+     *
+     * @param path [Path] to search for.
+     * @return A [Song] corresponding to the given [Path], or null if one could not be found.
+     */
+    fun findSongByPath(path: Path): Song?
+
     /**
      * Find a [Album] instance corresponding to the given [Music.UID].
      *
@@ -110,19 +120,19 @@ interface DeviceLibrary {
         suspend fun create(
             rawSongs: Channel<RawSong>,
             processedSongs: Channel<RawSong>,
+            separators: Separators,
+            nameFactory: Name.Known.Factory
         ): DeviceLibraryImpl
     }
 }
 
-class DeviceLibraryFactoryImpl @Inject constructor(private val musicSettings: MusicSettings) :
-    DeviceLibrary.Factory {
+class DeviceLibraryFactoryImpl @Inject constructor() : DeviceLibrary.Factory {
     override suspend fun create(
         rawSongs: Channel<RawSong>,
-        processedSongs: Channel<RawSong>
+        processedSongs: Channel<RawSong>,
+        separators: Separators,
+        nameFactory: Name.Known.Factory
     ): DeviceLibraryImpl {
-        val nameFactory = Name.Known.Factory.from(musicSettings)
-        val separators = Separators.from(musicSettings)
-
         val songGrouping = mutableMapOf<Music.UID, SongImpl>()
         val albumGrouping = mutableMapOf<RawAlbum.Key, Grouping<RawAlbum, SongImpl>>()
         val artistGrouping = mutableMapOf<RawArtist.Key, Grouping<RawArtist, Music>>()
@@ -131,7 +141,7 @@ class DeviceLibraryFactoryImpl @Inject constructor(private val musicSettings: Mu
         // TODO: Use comparators here
 
         // All music information is grouped as it is indexed by other components.
-        for (rawSong in rawSongs) {
+        rawSongs.forEachWithTimeout { rawSong ->
             val song = SongImpl(rawSong, nameFactory, separators)
             // At times the indexer produces duplicate songs, try to filter these. Comparing by
             // UID is sufficient for something like this, and also prevents collisions from
@@ -143,8 +153,8 @@ class DeviceLibraryFactoryImpl @Inject constructor(private val musicSettings: Mu
                 // We still want to say that we "processed" the song so that the user doesn't
                 // get confused at why the bar was only partly filled by the end of the loading
                 // process.
-                processedSongs.send(rawSong)
-                continue
+                processedSongs.sendWithTimeout(rawSong)
+                return@forEachWithTimeout
             }
             songGrouping[song.uid] = song
 
@@ -207,7 +217,7 @@ class DeviceLibraryFactoryImpl @Inject constructor(private val musicSettings: Mu
                 }
             }
 
-            processedSongs.send(rawSong)
+            processedSongs.sendWithTimeout(rawSong)
         }
 
         // Now that all songs are processed, also process albums and group them into their
@@ -265,6 +275,7 @@ class DeviceLibraryImpl(
 ) : DeviceLibrary {
     // Use a mapping to make finding information based on it's UID much faster.
     private val songUidMap = buildMap { songs.forEach { put(it.uid, it.finalize()) } }
+    private val songPathMap = buildMap { songs.forEach { put(it.path, it) } }
     private val albumUidMap = buildMap { albums.forEach { put(it.uid, it.finalize()) } }
     private val artistUidMap = buildMap { artists.forEach { put(it.uid, it.finalize()) } }
     private val genreUidMap = buildMap { genres.forEach { put(it.uid, it.finalize()) } }
@@ -286,6 +297,8 @@ class DeviceLibraryImpl(
 
     override fun findGenre(uid: Music.UID): Genre? = genreUidMap[uid]
 
+    override fun findSongByPath(path: Path) = songPathMap[path]
+
     override fun findSongForUri(context: Context, uri: Uri) =
         context.contentResolverSafe.useQuery(
             uri, arrayOf(OpenableColumns.DISPLAY_NAME, OpenableColumns.SIZE)) { cursor ->

app/src/main/java/org/oxycblt/auxio/music/device/DeviceMusicImpl.kt

@@ -28,7 +28,6 @@ import org.oxycblt.auxio.music.Music
 import org.oxycblt.auxio.music.MusicType
 import org.oxycblt.auxio.music.Song
 import org.oxycblt.auxio.music.fs.MimeType
-import org.oxycblt.auxio.music.fs.Path
 import org.oxycblt.auxio.music.fs.toAudioUri
 import org.oxycblt.auxio.music.fs.toCoverUri
 import org.oxycblt.auxio.music.info.Date
@@ -75,41 +74,31 @@ class SongImpl(
             }
     override val name =
         nameFactory.parse(
-            requireNotNull(rawSong.name) { "Invalid raw ${rawSong.fileName}: No title" },
+            requireNotNull(rawSong.name) { "Invalid raw ${rawSong.path}: No title" },
             rawSong.sortName)
 
     override val track = rawSong.track
     override val disc = rawSong.disc?.let { Disc(it, rawSong.subtitle) }
     override val date = rawSong.date
     override val uri =
-        requireNotNull(rawSong.mediaStoreId) { "Invalid raw ${rawSong.fileName}: No id" }
-            .toAudioUri()
-    override val path =
-        Path(
-            name =
-                requireNotNull(rawSong.fileName) {
-                    "Invalid raw ${rawSong.fileName}: No display name"
-                },
-            parent =
-                requireNotNull(rawSong.directory) {
-                    "Invalid raw ${rawSong.fileName}: No parent directory"
-                })
+        requireNotNull(rawSong.mediaStoreId) { "Invalid raw ${rawSong.path}: No id" }.toAudioUri()
+    override val path = requireNotNull(rawSong.path) { "Invalid raw ${rawSong.path}: No path" }
     override val mimeType =
         MimeType(
             fromExtension =
                 requireNotNull(rawSong.extensionMimeType) {
-                    "Invalid raw ${rawSong.fileName}: No mime type"
+                    "Invalid raw ${rawSong.path}: No mime type"
                 },
             fromFormat = null)
-    override val size = requireNotNull(rawSong.size) { "Invalid raw ${rawSong.fileName}: No size" }
+    override val size = requireNotNull(rawSong.size) { "Invalid raw ${rawSong.path}: No size" }
     override val durationMs =
-        requireNotNull(rawSong.durationMs) { "Invalid raw ${rawSong.fileName}: No duration" }
+        requireNotNull(rawSong.durationMs) { "Invalid raw ${rawSong.path}: No duration" }
     override val replayGainAdjustment =
         ReplayGainAdjustment(
             track = rawSong.replayGainTrackAdjustment, album = rawSong.replayGainAlbumAdjustment)
 
     override val dateAdded =
-        requireNotNull(rawSong.dateAdded) { "Invalid raw ${rawSong.fileName}: No date added" }
+        requireNotNull(rawSong.dateAdded) { "Invalid raw ${rawSong.path}: No date added" }
 
     private var _album: AlbumImpl? = null
     override val album: Album
@@ -150,37 +139,37 @@ class SongImpl(
         val artistSortNames = separators.split(rawSong.artistSortNames)
         val rawIndividualArtists =
             artistNames
-                .mapIndexedTo(mutableSetOf()) { i, name ->
+                .mapIndexed { i, name ->
                     RawArtist(
                         artistMusicBrainzIds.getOrNull(i)?.toUuidOrNull(),
                         name,
                         artistSortNames.getOrNull(i))
                 }
-                .toList()
+                .distinctBy { it.key }
 
         val albumArtistMusicBrainzIds = separators.split(rawSong.albumArtistMusicBrainzIds)
         val albumArtistNames = separators.split(rawSong.albumArtistNames)
         val albumArtistSortNames = separators.split(rawSong.albumArtistSortNames)
         val rawAlbumArtists =
             albumArtistNames
-                .mapIndexedTo(mutableSetOf()) { i, name ->
+                .mapIndexed { i, name ->
                     RawArtist(
                         albumArtistMusicBrainzIds.getOrNull(i)?.toUuidOrNull(),
                         name,
                         albumArtistSortNames.getOrNull(i))
                 }
-                .toList()
+                .distinctBy { it.key }
 
         rawAlbum =
             RawAlbum(
                 mediaStoreId =
                     requireNotNull(rawSong.albumMediaStoreId) {
-                        "Invalid raw ${rawSong.fileName}: No album id"
+                        "Invalid raw ${rawSong.path}: No album id"
                     },
                 musicBrainzId = rawSong.albumMusicBrainzId?.toUuidOrNull(),
                 name =
                     requireNotNull(rawSong.albumName) {
-                        "Invalid raw ${rawSong.fileName}: No album name"
+                        "Invalid raw ${rawSong.path}: No album name"
                     },
                 sortName = rawSong.albumSortName,
                 releaseType = ReleaseType.parse(separators.split(rawSong.releaseTypes)),
@@ -195,10 +184,7 @@ class SongImpl(
         val genreNames =
             (rawSong.genreNames.parseId3GenreNames() ?: separators.split(rawSong.genreNames))
         rawGenres =
-            genreNames
-                .mapTo(mutableSetOf()) { RawGenre(it) }
-                .toList()
-                .ifEmpty { listOf(RawGenre()) }
+            genreNames.map { RawGenre(it) }.distinctBy { it.key }.ifEmpty { listOf(RawGenre()) }
 
         hashCode = 31 * hashCode + rawSong.hashCode()
         hashCode = 31 * hashCode + nameFactory.hashCode()
@@ -250,11 +236,11 @@ class SongImpl(
      * @return This instance upcasted to [Song].
      */
     fun finalize(): Song {
-        checkNotNull(_album) { "Malformed song ${path.name}: No album" }
+        checkNotNull(_album) { "Malformed song ${path}: No album" }
 
-        check(_artists.isNotEmpty()) { "Malformed song ${path.name}: No artists" }
+        check(_artists.isNotEmpty()) { "Malformed song ${path}: No artists" }
         check(_artists.size == rawArtists.size) {
-            "Malformed song ${path.name}: Artist grouping mismatch"
+            "Malformed song ${path}: Artist grouping mismatch"
         }
         for (i in _artists.indices) {
             // Non-destructively reorder the linked artists so that they align with
@@ -265,10 +251,8 @@ class SongImpl(
             _artists[i] = other
         }
 
-        check(_genres.isNotEmpty()) { "Malformed song ${path.name}: No genres" }
-        check(_genres.size == rawGenres.size) {
-            "Malformed song ${path.name}: Genre grouping mismatch"
-        }
+        check(_genres.isNotEmpty()) { "Malformed song ${path}: No genres" }
+        check(_genres.size == rawGenres.size) { "Malformed song ${path}: Genre grouping mismatch" }
         for (i in _genres.indices) {
             // Non-destructively reorder the linked genres so that they align with
             // the genre ordering within the song metadata.
@@ -432,7 +416,6 @@ class ArtistImpl(
             ?: Name.Unknown(R.string.def_artist)
 
     override val songs: Set<Song>
-    override val albums: Set<Album>
     override val explicitAlbums: Set<Album>
     override val implicitAlbums: Set<Album>
     override val durationMs: Long?
@@ -463,7 +446,7 @@ class ArtistImpl(
         }
 
         songs = distinctSongs
-        albums = albumMap.keys
+        val albums = albumMap.keys
         explicitAlbums = albums.filterTo(mutableSetOf()) { albumMap[it] == true }
         implicitAlbums = albums.filterNotTo(mutableSetOf()) { albumMap[it] == true }
         durationMs = songs.sumOf { it.durationMs }.positiveOrNull()
@@ -506,7 +489,16 @@ class ArtistImpl(
      * @return This instance upcasted to [Artist].
      */
     fun finalize(): Artist {
-        check(songs.isNotEmpty() || albums.isNotEmpty()) { "Malformed artist $name: Empty" }
+        // There are valid artist configurations:
+        // 1. No songs, no implicit albums, some explicit albums
+        // 2. Some songs, no implicit albums, some explicit albums
+        // 3. Some songs, some implicit albums, no implicit albums
+        // 4. Some songs, some implicit albums, some explicit albums
+        // I'm pretty sure the latter check could be reduced to just explicitAlbums.isNotEmpty,
+        // but I can't be 100% certain.
+        check(songs.isNotEmpty() || (implicitAlbums.size + explicitAlbums.size) > 0) {
+            "Malformed artist $name: Empty"
+        }
         genres =
             Sort(Sort.Mode.ByName, Sort.Direction.ASCENDING)
                 .genres(songs.flatMapTo(mutableSetOf()) { it.genres })
@@ -514,6 +506,7 @@ class ArtistImpl(
         return this
     }
 }
+
 /**
  * Library-backed implementation of [Genre].
  *

app/src/main/java/org/oxycblt/auxio/music/device/RawMusic.kt

@@ -22,7 +22,7 @@ import java.util.UUID
 import org.oxycblt.auxio.music.Album
 import org.oxycblt.auxio.music.Music
 import org.oxycblt.auxio.music.Song
-import org.oxycblt.auxio.music.fs.Directory
+import org.oxycblt.auxio.music.fs.Path
 import org.oxycblt.auxio.music.info.Date
 import org.oxycblt.auxio.music.info.ReleaseType
 
@@ -42,9 +42,7 @@ data class RawSong(
     /** The latest date the [SongImpl]'s audio file was modified, as a unix epoch timestamp. */
     var dateModified: Long? = null,
     /** @see Song.path */
-    var fileName: String? = null,
-    /** @see Song.path */
-    var directory: Directory? = null,
+    var path: Path? = null,
     /** @see Song.size */
     var size: Long? = null,
     /** @see Song.durationMs */

app/src/main/java/org/oxycblt/auxio/music/dirs/DirectoryAdapter.kt

@@ -16,13 +16,14 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
  
-package org.oxycblt.auxio.music.fs
+package org.oxycblt.auxio.music.dirs
 
 import android.view.View
 import android.view.ViewGroup
 import androidx.recyclerview.widget.RecyclerView
 import org.oxycblt.auxio.databinding.ItemMusicDirBinding
 import org.oxycblt.auxio.list.recycler.DialogRecyclerView
+import org.oxycblt.auxio.music.fs.Path
 import org.oxycblt.auxio.util.context
 import org.oxycblt.auxio.util.inflater
 import org.oxycblt.auxio.util.logD
@@ -35,11 +36,11 @@ import org.oxycblt.auxio.util.logD
  */
 class DirectoryAdapter(private val listener: Listener) :
     RecyclerView.Adapter<MusicDirViewHolder>() {
-    private val _dirs = mutableListOf<Directory>()
+    private val _dirs = mutableListOf<Path>()
     /**
-     * The current list of [Directory]s, may not line up with [MusicDirectories] due to removals.
+     * The current list of [SystemPath]s, may not line up with [MusicDirectories] due to removals.
      */
-    val dirs: List<Directory> = _dirs
+    val dirs: List<Path> = _dirs
 
     override fun getItemCount() = dirs.size
 
@@ -50,37 +51,37 @@ class DirectoryAdapter(private val listener: Listener) :
         holder.bind(dirs[position], listener)
 
     /**
-     * Add a [Directory] to the end of the list.
+     * Add a [Path] to the end of the list.
      *
-     * @param dir The [Directory] to add.
+     * @param path The [Path] to add.
      */
-    fun add(dir: Directory) {
-        if (_dirs.contains(dir)) return
-        logD("Adding $dir")
-        _dirs.add(dir)
+    fun add(path: Path) {
+        if (_dirs.contains(path)) return
+        logD("Adding $path")
+        _dirs.add(path)
         notifyItemInserted(_dirs.lastIndex)
     }
 
     /**
-     * Add a list of [Directory] instances to the end of the list.
+     * Add a list of [Path] instances to the end of the list.
      *
-     * @param dirs The [Directory] instances to add.
+     * @param path The [Path] instances to add.
      */
-    fun addAll(dirs: List<Directory>) {
-        logD("Adding ${dirs.size} directories")
-        val oldLastIndex = dirs.lastIndex
-        _dirs.addAll(dirs)
-        notifyItemRangeInserted(oldLastIndex, dirs.size)
+    fun addAll(path: List<Path>) {
+        logD("Adding ${path.size} directories")
+        val oldLastIndex = path.lastIndex
+        _dirs.addAll(path)
+        notifyItemRangeInserted(oldLastIndex, path.size)
     }
 
     /**
-     * Remove a [Directory] from the list.
+     * Remove a [Path] from the list.
      *
-     * @param dir The [Directory] to remove. Must exist in the list.
+     * @param path The [Path] to remove. Must exist in the list.
      */
-    fun remove(dir: Directory) {
-        logD("Removing $dir")
-        val idx = _dirs.indexOf(dir)
+    fun remove(path: Path) {
+        logD("Removing $path")
+        val idx = _dirs.indexOf(path)
         _dirs.removeAt(idx)
         notifyItemRemoved(idx)
     }
@@ -88,7 +89,7 @@ class DirectoryAdapter(private val listener: Listener) :
     /** A Listener for [DirectoryAdapter] interactions. */
     interface Listener {
         /** Called when the delete button on a directory item is clicked. */
-        fun onRemoveDirectory(dir: Directory)
+        fun onRemoveDirectory(dir: Path)
     }
 }
 
@@ -102,12 +103,12 @@ class MusicDirViewHolder private constructor(private val binding: ItemMusicDirBi
     /**
      * Bind new data to this instance.
      *
-     * @param dir The new [Directory] to bind.
+     * @param path The new [Path] to bind.
      * @param listener A [DirectoryAdapter.Listener] to bind interactions to.
      */
-    fun bind(dir: Directory, listener: DirectoryAdapter.Listener) {
-        binding.dirPath.text = dir.resolveName(binding.context)
-        binding.dirDelete.setOnClickListener { listener.onRemoveDirectory(dir) }
+    fun bind(path: Path, listener: DirectoryAdapter.Listener) {
+        binding.dirPath.text = path.resolve(binding.context)
+        binding.dirDelete.setOnClickListener { listener.onRemoveDirectory(path) }
     }
 
     companion object {

app/src/main/java/org/oxycblt/auxio/music/dirs/DirectoryModule.kt

@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2023 Auxio Project
+ * DirectoryModule.kt is part of Auxio.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
+package org.oxycblt.auxio.music.dirs
+
+import dagger.Module
+import dagger.hilt.InstallIn
+import dagger.hilt.components.SingletonComponent
+
+@Module @InstallIn(SingletonComponent::class) interface DirectoryModule {}

app/src/main/java/org/oxycblt/auxio/music/dirs/MusicDirectories.kt

@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2023 Auxio Project
+ * MusicDirectories.kt is part of Auxio.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
+package org.oxycblt.auxio.music.dirs
+
+import org.oxycblt.auxio.music.fs.Path
+
+/**
+ * Represents the configuration for specific directories to filter to/from when loading music.
+ *
+ * @param dirs A list of [Directory] instances. How these are interpreted depends on [shouldInclude]
+ * @param shouldInclude True if the library should only load from the [Directory] instances, false
+ *   if the library should not load from the [Directory] instances.
+ * @author Alexander Capehart (OxygenCobalt)
+ */
+data class MusicDirectories(val dirs: List<Path>, val shouldInclude: Boolean)

app/src/main/java/org/oxycblt/auxio/music/dirs/MusicDirsDialog.kt

@@ -16,13 +16,11 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
  
-package org.oxycblt.auxio.music.fs
+package org.oxycblt.auxio.music.dirs
 
 import android.content.ActivityNotFoundException
 import android.net.Uri
 import android.os.Bundle
-import android.os.storage.StorageManager
-import android.provider.DocumentsContract
 import android.view.LayoutInflater
 import androidx.activity.result.ActivityResultLauncher
 import androidx.activity.result.contract.ActivityResultContracts
@@ -35,8 +33,9 @@ import org.oxycblt.auxio.BuildConfig
 import org.oxycblt.auxio.R
 import org.oxycblt.auxio.databinding.DialogMusicDirsBinding
 import org.oxycblt.auxio.music.MusicSettings
+import org.oxycblt.auxio.music.fs.DocumentPathFactory
+import org.oxycblt.auxio.music.fs.Path
 import org.oxycblt.auxio.ui.ViewBindingMaterialDialogFragment
-import org.oxycblt.auxio.util.getSystemServiceCompat
 import org.oxycblt.auxio.util.logD
 import org.oxycblt.auxio.util.showToast
 
@@ -50,7 +49,7 @@ class MusicDirsDialog :
     ViewBindingMaterialDialogFragment<DialogMusicDirsBinding>(), DirectoryAdapter.Listener {
     private val dirAdapter = DirectoryAdapter(this)
     private var openDocumentTreeLauncher: ActivityResultLauncher<Uri?>? = null
-    private var storageManager: StorageManager? = null
+    @Inject lateinit var documentPathFactory: DocumentPathFactory
     @Inject lateinit var musicSettings: MusicSettings
 
     override fun onCreateBinding(inflater: LayoutInflater) =
@@ -70,10 +69,6 @@ class MusicDirsDialog :
     }
 
     override fun onBindingCreated(binding: DialogMusicDirsBinding, savedInstanceState: Bundle?) {
-        val context = requireContext()
-        val storageManager =
-            context.getSystemServiceCompat(StorageManager::class).also { storageManager = it }
-
         openDocumentTreeLauncher =
             registerForActivityResult(
                 ActivityResultContracts.OpenDocumentTree(), ::addDocumentTreeUriToDirs)
@@ -107,9 +102,7 @@ class MusicDirsDialog :
             if (pendingDirs != null) {
                 dirs =
                     MusicDirectories(
-                        pendingDirs.mapNotNull {
-                            Directory.fromDocumentTreeUri(storageManager, it)
-                        },
+                        pendingDirs.mapNotNull(documentPathFactory::fromDocumentId),
                         savedInstanceState.getBoolean(KEY_PENDING_MODE))
             }
         }
@@ -133,18 +126,17 @@ class MusicDirsDialog :
     override fun onSaveInstanceState(outState: Bundle) {
         super.onSaveInstanceState(outState)
         outState.putStringArrayList(
-            KEY_PENDING_DIRS, ArrayList(dirAdapter.dirs.map { it.toString() }))
+            KEY_PENDING_DIRS, ArrayList(dirAdapter.dirs.map(documentPathFactory::toDocumentId)))
         outState.putBoolean(KEY_PENDING_MODE, isUiModeInclude(requireBinding()))
     }
 
     override fun onDestroyBinding(binding: DialogMusicDirsBinding) {
         super.onDestroyBinding(binding)
-        storageManager = null
         openDocumentTreeLauncher = null
         binding.dirsRecycler.adapter = null
     }
 
-    override fun onRemoveDirectory(dir: Directory) {
+    override fun onRemoveDirectory(dir: Path) {
         dirAdapter.remove(dir)
         requireBinding().dirsEmpty.isVisible = dirAdapter.dirs.isEmpty()
     }
@@ -162,15 +154,7 @@ class MusicDirsDialog :
             return
         }
 
-        // Convert the document tree URI into it's relative path form, which can then be
-        // parsed into a Directory instance.
-        val docUri =
-            DocumentsContract.buildDocumentUriUsingTree(
-                uri, DocumentsContract.getTreeDocumentId(uri))
-        val treeUri = DocumentsContract.getTreeDocumentId(docUri)
-        val dir =
-            Directory.fromDocumentTreeUri(
-                requireNotNull(storageManager) { "StorageManager was not available" }, treeUri)
+        val dir = documentPathFactory.unpackDocumentTreeUri(uri)
 
         if (dir != null) {
             dirAdapter.add(dir)

app/src/main/java/org/oxycblt/auxio/music/external/ExternalModule.kt

@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2023 Auxio Project
+ * ExternalModule.kt is part of Auxio.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
+package org.oxycblt.auxio.music.external
+
+import dagger.Binds
+import dagger.Module
+import dagger.hilt.InstallIn
+import dagger.hilt.components.SingletonComponent
+
+@Module
+@InstallIn(SingletonComponent::class)
+interface ExternalModule {
+    @Binds
+    fun externalPlaylistManager(
+        externalPlaylistManager: ExternalPlaylistManagerImpl
+    ): ExternalPlaylistManager
+
+    @Binds fun m3u(m3u: M3UImpl): M3U
+}

app/src/main/java/org/oxycblt/auxio/music/external/ExternalPlaylistManager.kt

@@ -0,0 +1,124 @@
+/*
+ * Copyright (c) 2023 Auxio Project
+ * ExternalPlaylistManager.kt is part of Auxio.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
+package org.oxycblt.auxio.music.external
+
+import android.content.Context
+import android.net.Uri
+import dagger.hilt.android.qualifiers.ApplicationContext
+import javax.inject.Inject
+import org.oxycblt.auxio.music.Playlist
+import org.oxycblt.auxio.music.fs.Components
+import org.oxycblt.auxio.music.fs.DocumentPathFactory
+import org.oxycblt.auxio.music.fs.Path
+import org.oxycblt.auxio.music.fs.contentResolverSafe
+import org.oxycblt.auxio.util.logE
+
+/**
+ * Generic playlist file importing abstraction.
+ *
+ * @see ImportedPlaylist
+ * @see M3U
+ * @author Alexander Capehart (OxygenCobalt)
+ */
+interface ExternalPlaylistManager {
+    /**
+     * Import the playlist file at the given [uri].
+     *
+     * @param uri The [Uri] of the playlist file to import.
+     * @return An [ImportedPlaylist] containing the paths to the files listed in the playlist file,
+     *   or null if the playlist could not be imported.
+     */
+    suspend fun import(uri: Uri): ImportedPlaylist?
+
+    /**
+     * Export the given [playlist] to the given [uri].
+     *
+     * @param playlist The playlist to export.
+     * @param uri The [Uri] to export the playlist to.
+     * @param config The configuration to use when exporting the playlist.
+     * @return True if the playlist was successfully exported, false otherwise.
+     */
+    suspend fun export(playlist: Playlist, uri: Uri, config: ExportConfig): Boolean
+}
+
+/**
+ * Configuration to use when exporting playlists.
+ *
+ * @property absolute Whether or not to use absolute paths when exporting. If not, relative paths
+ *   will be used.
+ * @property windowsPaths Whether or not to use Windows-style paths when exporting (i.e prefixed
+ *   with C:\\ and using \). If not, Unix-style paths will be used (i.e prefixed with /).
+ * @see ExternalPlaylistManager.export
+ */
+data class ExportConfig(val absolute: Boolean, val windowsPaths: Boolean)
+
+/**
+ * A playlist that has been imported.
+ *
+ * @property name The name of the playlist. May be null if not provided.
+ * @property paths The paths of the files in the playlist.
+ * @see ExternalPlaylistManager
+ * @see M3U
+ */
+data class ImportedPlaylist(val name: String?, val paths: List<Path>)
+
+class ExternalPlaylistManagerImpl
+@Inject
+constructor(
+    @ApplicationContext private val context: Context,
+    private val documentPathFactory: DocumentPathFactory,
+    private val m3u: M3U
+) : ExternalPlaylistManager {
+    override suspend fun import(uri: Uri): ImportedPlaylist? {
+        val filePath = documentPathFactory.unpackDocumentUri(uri) ?: return null
+
+        return try {
+            context.contentResolverSafe.openInputStream(uri)?.use {
+                return m3u.read(it, filePath.directory)
+            }
+        } catch (e: Exception) {
+            logE("Failed to import playlist: $e")
+            null
+        }
+    }
+
+    override suspend fun export(playlist: Playlist, uri: Uri, config: ExportConfig): Boolean {
+        val filePath = documentPathFactory.unpackDocumentUri(uri) ?: return false
+        val workingDirectory =
+            if (config.absolute) {
+                Path(filePath.volume, Components.parseUnix("/"))
+            } else {
+                filePath.directory
+            }
+        return try {
+            val outputStream = context.contentResolverSafe.openOutputStream(uri)
+            if (outputStream == null) {
+                logE("Failed to export playlist: Could not open output stream")
+                return false
+            }
+            outputStream.use {
+                m3u.write(playlist, it, workingDirectory, config)
+                true
+            }
+        } catch (e: Exception) {
+            logE("Failed to export playlist: $e")
+            false
+        }
+    }
+}

app/src/main/java/org/oxycblt/auxio/music/external/M3U.kt

@@ -0,0 +1,267 @@
+/*
+ * Copyright (c) 2023 Auxio Project
+ * M3U.kt is part of Auxio.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
+package org.oxycblt.auxio.music.external
+
+import android.content.Context
+import dagger.hilt.android.qualifiers.ApplicationContext
+import java.io.BufferedReader
+import java.io.BufferedWriter
+import java.io.InputStream
+import java.io.InputStreamReader
+import java.io.OutputStream
+import javax.inject.Inject
+import org.oxycblt.auxio.music.Playlist
+import org.oxycblt.auxio.music.fs.Components
+import org.oxycblt.auxio.music.fs.Path
+import org.oxycblt.auxio.music.metadata.correctWhitespace
+import org.oxycblt.auxio.music.resolveNames
+import org.oxycblt.auxio.util.logE
+
+/**
+ * Minimal M3U file format implementation.
+ *
+ * @author Alexander Capehart (OxygenCobalt)
+ */
+interface M3U {
+    /**
+     * Reads an M3U file from the given [stream] and returns a [ImportedPlaylist] containing the
+     * paths to the files listed in the M3U file.
+     *
+     * @param stream The stream to read the M3U file from.
+     * @param workingDirectory The directory that the M3U file is contained in. This is used to
+     *   resolve relative paths.
+     * @return An [ImportedPlaylist] containing the paths to the files listed in the M3U file,
+     */
+    fun read(stream: InputStream, workingDirectory: Path): ImportedPlaylist?
+
+    /**
+     * Writes the given [playlist] to the given [outputStream] in the M3U format,.
+     *
+     * @param playlist The playlist to write.
+     * @param outputStream The stream to write the M3U file to.
+     * @param workingDirectory The directory that the M3U file is contained in. This is used to
+     *   create relative paths to where the M3U file is assumed to be stored.
+     * @param config The configuration to use when exporting the playlist.
+     */
+    fun write(
+        playlist: Playlist,
+        outputStream: OutputStream,
+        workingDirectory: Path,
+        config: ExportConfig
+    )
+
+    companion object {
+        /** The mime type used for M3U files by the android system. */
+        const val MIME_TYPE = "audio/x-mpegurl"
+    }
+}
+
+class M3UImpl @Inject constructor(@ApplicationContext private val context: Context) : M3U {
+    override fun read(stream: InputStream, workingDirectory: Path): ImportedPlaylist? {
+        val reader = BufferedReader(InputStreamReader(stream))
+        val paths = mutableListOf<Path>()
+        var name: String? = null
+
+        consumeFile@ while (true) {
+            var path: String?
+            collectMetadata@ while (true) {
+                // The M3U format consists of "entries" that begin with a bunch of metadata
+                // prefixed with "#", and then a relative/absolute path or url to the file.
+                // We don't really care about the metadata except for the playlist name, so
+                // we discard everything but that.
+                val currentLine =
+                    (reader.readLine() ?: break@consumeFile).correctWhitespace()
+                        ?: continue@collectMetadata
+                if (currentLine.startsWith("#")) {
+                    // Metadata entries are roughly structured
+                    val split = currentLine.split(":", limit = 2)
+                    when (split[0]) {
+                        // Playlist name
+                        "#PLAYLIST" -> name = split.getOrNull(1)?.correctWhitespace()
+                        // Add more metadata handling here if needed.
+                        else -> {}
+                    }
+                } else {
+                    // Something that isn't a metadata entry, assume it's a path. It could be
+                    // a URL, but it'll just get mangled really badly and not match with anything,
+                    // so it's okay.
+                    path = currentLine
+                    break@collectMetadata
+                }
+            }
+
+            if (path == null) {
+                logE("Expected a path, instead got an EOF")
+                break@consumeFile
+            }
+
+            // There is basically no formal specification of file paths in M3U, and it differs
+            // based on the US that generated it. These are the paths though that I assume most
+            // programs will generate.
+            val components =
+                when {
+                    path.startsWith('/') -> {
+                        // Unix absolute path. Note that we still assume this absolute path is in
+                        // the same volume as the M3U file. There's no sane way to map the volume
+                        // to the phone's volumes, so this is the only thing we can do.
+                        Components.parseUnix(path)
+                    }
+                    path.startsWith("./") -> {
+                        // Unix relative path, resolve it
+                        Components.parseUnix(path).absoluteTo(workingDirectory.components)
+                    }
+                    path.matches(WINDOWS_VOLUME_PREFIX_REGEX) -> {
+                        // Windows absolute path, we should get rid of the volume prefix, but
+                        // otherwise
+                        // the rest should be fine. Again, we have to disregard what the volume
+                        // actually
+                        // is since there's no sane way to map it to the phone's volumes.
+                        Components.parseWindows(path.substring(2))
+                    }
+                    path.startsWith(".\\") -> {
+                        // Windows relative path, we need to remove the .\\ prefix
+                        Components.parseWindows(path).absoluteTo(workingDirectory.components)
+                    }
+                    else -> {
+                        // No clue, parse by all separators and assume it's relative.
+                        Components.parseAny(path).absoluteTo(workingDirectory.components)
+                    }
+                }
+
+            paths.add(Path(workingDirectory.volume, components))
+        }
+
+        return if (paths.isNotEmpty()) {
+            ImportedPlaylist(name, paths)
+        } else {
+            // Couldn't get anything useful out of this file.
+            null
+        }
+    }
+
+    override fun write(
+        playlist: Playlist,
+        outputStream: OutputStream,
+        workingDirectory: Path,
+        config: ExportConfig
+    ) {
+        val writer = outputStream.bufferedWriter()
+        // Try to be as compliant to the spec as possible while also cramming it full of extensions
+        // I imagine other players will use.
+        writer.writeLine("#EXTM3U")
+        writer.writeLine("#EXTENC:UTF-8")
+        writer.writeLine("#PLAYLIST:${playlist.name.resolve(context)}")
+        for (song in playlist.songs) {
+            writer.writeLine("#EXTINF:${song.durationMs},${song.name.resolve(context)}")
+            writer.writeLine("#EXTALB:${song.album.name.resolve(context)}")
+            writer.writeLine("#EXTART:${song.artists.resolveNames(context)}")
+            writer.writeLine("#EXTGEN:${song.genres.resolveNames(context)}")
+
+            val formattedPath =
+                if (config.absolute) {
+                    // The path is already absolute in this case, but we need to prefix and separate
+                    // it differently depending on the setting.
+                    if (config.windowsPaths) {
+                        // Assume the plain windows C volume, since that's probably where most music
+                        // libraries are on a windows PC.
+                        "C:\\\\${song.path.components.windowsString}"
+                    } else {
+                        "/${song.path.components.unixString}"
+                    }
+                } else {
+                    // First need to make this path relative to the working directory of the M3U
+                    // file, and then format it with the correct separators.
+                    val relativePath = song.path.components.relativeTo(workingDirectory.components)
+                    if (config.windowsPaths) {
+                        relativePath.windowsString
+                    } else {
+                        relativePath.unixString
+                    }
+                }
+            writer.writeLine(formattedPath)
+        }
+        writer.flush()
+    }
+
+    private fun BufferedWriter.writeLine(line: String) {
+        write(line)
+        newLine()
+    }
+
+    private fun Components.absoluteTo(workingDirectory: Components): Components {
+        var absoluteComponents = workingDirectory
+        for (component in components) {
+            when (component) {
+                // Parent specifier, go "back" one directory (in practice cleave off the last
+                // component)
+                ".." -> absoluteComponents = absoluteComponents.parent()
+                // Current directory, the components are already there.
+                "." -> {}
+                // New directory, add it
+                else -> absoluteComponents = absoluteComponents.child(component)
+            }
+        }
+        return absoluteComponents
+    }
+
+    private fun Components.relativeTo(workingDirectory: Components): Components {
+        // We want to find the common prefix of the working directory and path, and then
+        // and them combine them with the correct relative elements to make sure they
+        // resolve the same.
+        var commonIndex = 0
+        while (commonIndex < components.size &&
+            commonIndex < workingDirectory.components.size &&
+            components[commonIndex] == workingDirectory.components[commonIndex]) {
+            ++commonIndex
+        }
+
+        var relativeComponents = Components.parseUnix(".")
+
+        // TODO: Simplify this logic
+        when {
+            commonIndex == components.size && commonIndex == workingDirectory.components.size -> {
+                // The paths are the same. This shouldn't occur.
+            }
+            commonIndex == components.size -> {
+                // The working directory is deeper in the path, backtrack.
+                for (i in 0..workingDirectory.components.size - commonIndex - 1) {
+                    relativeComponents = relativeComponents.child("..")
+                }
+            }
+            commonIndex == workingDirectory.components.size -> {
+                // Working directory is shallower than the path, can just append the
+                // non-common remainder of the path
+                relativeComponents = relativeComponents.child(depth(commonIndex))
+            }
+            else -> {
+                // The paths are siblings. Backtrack and append as needed.
+                for (i in 0..workingDirectory.components.size - commonIndex - 1) {
+                    relativeComponents = relativeComponents.child("..")
+                }
+                relativeComponents = relativeComponents.child(depth(commonIndex))
+            }
+        }
+
+        return relativeComponents
+    }
+
+    private companion object {
+        val WINDOWS_VOLUME_PREFIX_REGEX = Regex("^[A-Za-z]:\\\\.*")
+    }
+}

app/src/main/java/org/oxycblt/auxio/music/fs/DocumentPathFactory.kt

@@ -0,0 +1,147 @@
+/*
+ * Copyright (c) 2023 Auxio Project
+ * DocumentPathFactory.kt is part of Auxio.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
+package org.oxycblt.auxio.music.fs
+
+import android.content.ContentUris
+import android.content.Context
+import android.net.Uri
+import android.provider.DocumentsContract
+import dagger.hilt.android.qualifiers.ApplicationContext
+import java.io.File
+import javax.inject.Inject
+
+/**
+ * A factory for parsing the reverse-engineered format of the URIs obtained from document picker.
+ *
+ * @author Alexander Capehart (OxygenCobalt)
+ */
+interface DocumentPathFactory {
+    /**
+     * Unpacks a document URI into a [Path] instance, using [fromDocumentId].
+     *
+     * @param uri The document URI to unpack.
+     * @return The [Path] instance, or null if the URI could not be unpacked.
+     */
+    fun unpackDocumentUri(uri: Uri): Path?
+
+    /**
+     * Unpacks a document tree URI into a [Path] instance, using [fromDocumentId].
+     *
+     * @param uri The document tree URI to unpack.
+     * @return The [Path] instance, or null if the URI could not be unpacked.
+     */
+    fun unpackDocumentTreeUri(uri: Uri): Path?
+
+    /**
+     * Serializes a [Path] instance into a document tree URI format path.
+     *
+     * @param path The [Path] instance to serialize.
+     * @return The serialized path.
+     */
+    fun toDocumentId(path: Path): String
+
+    /**
+     * Deserializes a document tree URI format path into a [Path] instance.
+     *
+     * @param path The path to deserialize.
+     * @return The [Path] instance, or null if the path could not be deserialized.
+     */
+    fun fromDocumentId(path: String): Path?
+}
+
+class DocumentPathFactoryImpl
+@Inject
+constructor(
+    @ApplicationContext private val context: Context,
+    private val volumeManager: VolumeManager,
+    private val mediaStorePathInterpreterFactory: MediaStorePathInterpreter.Factory
+) : DocumentPathFactory {
+    override fun unpackDocumentUri(uri: Uri): Path? {
+        val id = DocumentsContract.getDocumentId(uri)
+        val numericId = id.toLongOrNull()
+        return if (numericId != null) {
+            // The document URI is special and points to an entry only accessible via
+            // ContentResolver. In this case, we have to manually query MediaStore.
+            for (prefix in POSSIBLE_CONTENT_URI_PREFIXES) {
+                val contentUri = ContentUris.withAppendedId(prefix, numericId)
+
+                val path =
+                    context.contentResolverSafe.useQuery(
+                        contentUri, mediaStorePathInterpreterFactory.projection) {
+                            it.moveToFirst()
+                            mediaStorePathInterpreterFactory.wrap(it).extract()
+                        }
+
+                if (path != null) {
+                    return path
+                }
+            }
+
+            null
+        } else {
+            fromDocumentId(id)
+        }
+    }
+
+    override fun unpackDocumentTreeUri(uri: Uri): Path? {
+        // Convert the document tree URI into it's relative path form, which can then be
+        // parsed into a Directory instance.
+        val docUri =
+            DocumentsContract.buildDocumentUriUsingTree(
+                uri, DocumentsContract.getTreeDocumentId(uri))
+        val treeUri = DocumentsContract.getTreeDocumentId(docUri)
+        return fromDocumentId(treeUri)
+    }
+
+    override fun toDocumentId(path: Path): String =
+        when (val volume = path.volume) {
+            // The primary storage has a volume prefix of "primary", regardless
+            // of if it's internal or not.
+            is Volume.Internal -> "$DOCUMENT_URI_PRIMARY_NAME:${path.components}"
+            // Document tree URIs consist of a prefixed volume name followed by a relative path.
+            is Volume.External -> "${volume.id}:${path.components}"
+        }
+
+    override fun fromDocumentId(path: String): Path? {
+        // Document tree URIs consist of a prefixed volume name followed by a relative path,
+        // delimited with a colon.
+        val split = path.split(File.pathSeparator, limit = 2)
+        val volume =
+            when (split[0]) {
+                // The primary storage has a volume prefix of "primary", regardless
+                // of if it's internal or not.
+                DOCUMENT_URI_PRIMARY_NAME -> volumeManager.getInternalVolume()
+                // Removable storage has a volume prefix of it's UUID, try to find it
+                // within StorageManager's volume list.
+                else ->
+                    volumeManager.getVolumes().find { it is Volume.External && it.id == split[0] }
+            }
+        val relativePath = split.getOrNull(1) ?: return null
+        return Path(volume ?: return null, Components.parseUnix(relativePath))
+    }
+
+    private companion object {
+        const val DOCUMENT_URI_PRIMARY_NAME = "primary"
+
+        private val POSSIBLE_CONTENT_URI_PREFIXES =
+            arrayOf(
+                Uri.parse("content://downloads/public_downloads"),
+                Uri.parse("content://downloads/my_downloads"))
+    }
+}

app/src/main/java/org/oxycblt/auxio/music/fs/Fs.kt

@@ -24,119 +24,229 @@ import android.os.storage.StorageManager
 import android.os.storage.StorageVolume
 import android.webkit.MimeTypeMap
 import java.io.File
+import javax.inject.Inject
 import org.oxycblt.auxio.R
 
 /**
- * A full absolute path to a file. Only intended for display purposes. For accessing files, URIs are
- * preferred in all cases due to scoped storage limitations.
+ * An abstraction of an android file system path, including the volume and relative path.
  *
- * @param name The name of the file.
- * @param parent The parent [Directory] of the file.
- * @author Alexander Capehart (OxygenCobalt)
+ * @param volume The volume that the path is on.
+ * @param components The components of the path of the file, relative to the root of the volume.
  */
-data class Path(val name: String, val parent: Directory)
+data class Path(
+    val volume: Volume,
+    val components: Components,
+) {
+    /** The name of the file/directory. */
+    val name: String?
+        get() = components.name
 
-/**
- * A volume-aware relative path to a directory.
- *
- * @param volume The [StorageVolume] that the [Directory] is contained in.
- * @param relativePath The relative path from within the [StorageVolume] to the [Directory].
- * @author Alexander Capehart (OxygenCobalt)
- */
-class Directory private constructor(val volume: StorageVolume, val relativePath: String) {
-    /**
-     * Resolve the [Directory] instance into a human-readable path name.
-     *
-     * @param context [Context] required to obtain volume descriptions.
-     * @return A human-readable path.
-     * @see StorageVolume.getDescription
-     */
-    fun resolveName(context: Context) =
-        context.getString(R.string.fmt_path, volume.getDescriptionCompat(context), relativePath)
+    /** The parent directory of the path, or itself if it's the root path. */
+    val directory: Path
+        get() = Path(volume, components.parent())
 
     /**
-     * Converts this [Directory] instance into an opaque document tree path. This is a huge
-     * violation of the document tree URI contract, but it's also the only one can sensibly work
-     * with these uris in the UI, and it doesn't exactly matter since we never write or read to
-     * directory.
+     * Transforms this [Path] into a "file" of the given name that's within the "directory"
+     * represented by the current path. Ex. "/storage/emulated/0/Music" ->
+     * "/storage/emulated/0/Music/file.mp3"
      *
-     * @return A URI [String] abiding by the document tree specification, or null if the [Directory]
-     *   is not valid.
+     * @param fileName The name of the file to append to the path.
+     * @return The new [Path] instance.
      */
-    fun toDocumentTreeUri() =
-        // Document tree URIs consist of a prefixed volume name followed by a relative path.
-        if (volume.isInternalCompat) {
-            // The primary storage has a volume prefix of "primary", regardless
-            // of if it's internal or not.
-            "$DOCUMENT_URI_PRIMARY_NAME:$relativePath"
-        } else {
-            // Removable storage has a volume prefix of it's UUID.
-            volume.uuidCompat?.let { uuid -> "$uuid:$relativePath" }
-        }
+    fun file(fileName: String) = Path(volume, components.child(fileName))
 
-    override fun hashCode(): Int {
-        var result = volume.hashCode()
-        result = 31 * result + relativePath.hashCode()
-        return result
-    }
+    /**
+     * Resolves the [Path] in a human-readable format.
+     *
+     * @param context [Context] required to obtain human-readable strings.
+     */
+    fun resolve(context: Context) = "${volume.resolveName(context)}/$components"
+}
 
-    override fun equals(other: Any?) =
-        other is Directory && other.volume == volume && other.relativePath == relativePath
+sealed interface Volume {
+    /** The name of the volume as it appears in MediaStore. */
+    val mediaStoreName: String?
 
-    companion object {
-        /** The name given to the internal volume when in a document tree URI. */
-        private const val DOCUMENT_URI_PRIMARY_NAME = "primary"
+    /**
+     * The components of the path to the volume, relative from the system root. Should not be used
+     * except for compatibility purposes.
+     */
+    val components: Components?
 
-        /**
-         * Create a new directory instance from the given components.
-         *
-         * @param volume The [StorageVolume] that the [Directory] is contained in.
-         * @param relativePath The relative path from within the [StorageVolume] to the [Directory].
-         *   Will be stripped of any trailing separators for a consistent internal representation.
-         * @return A new [Directory] created from the components.
-         */
-        fun from(volume: StorageVolume, relativePath: String) =
-            Directory(
-                volume, relativePath.removePrefix(File.separator).removeSuffix(File.separator))
+    /** Resolves the name of the volume in a human-readable format. */
+    fun resolveName(context: Context): String
 
-        /**
-         * Create a new directory from a document tree URI. This is a huge violation of the document
-         * tree URI contract, but it's also the only one can sensibly work with these uris in the
-         * UI, and it doesn't exactly matter since we never write or read directory.
-         *
-         * @param storageManager [StorageManager] in order to obtain the [StorageVolume] specified
-         *   in the given URI.
-         * @param uri The URI string to parse into a [Directory].
-         * @return A new [Directory] parsed from the URI, or null if the URI is not valid.
-         */
-        fun fromDocumentTreeUri(storageManager: StorageManager, uri: String): Directory? {
-            // Document tree URIs consist of a prefixed volume name followed by a relative path,
-            // delimited with a colon.
-            val split = uri.split(File.pathSeparator, limit = 2)
-            val volume =
-                when (split[0]) {
-                    // The primary storage has a volume prefix of "primary", regardless
-                    // of if it's internal or not.
-                    DOCUMENT_URI_PRIMARY_NAME -> storageManager.primaryStorageVolumeCompat
-                    // Removable storage has a volume prefix of it's UUID, try to find it
-                    // within StorageManager's volume list.
-                    else -> storageManager.storageVolumesCompat.find { it.uuidCompat == split[0] }
-                }
-            val relativePath = split.getOrNull(1)
-            return from(volume ?: return null, relativePath ?: return null)
-        }
+    /** A volume representing the device's internal storage. */
+    interface Internal : Volume
+
+    /** A volume representing an external storage device, identified by a UUID. */
+    interface External : Volume {
+        /** The UUID of the volume. */
+        val id: String?
     }
 }
 
 /**
- * Represents the configuration for specific directories to filter to/from when loading music.
+ * The components of a path. This allows the path to be manipulated without having tp handle
+ * separator parsing.
  *
- * @param dirs A list of [Directory] instances. How these are interpreted depends on [shouldInclude]
- * @param shouldInclude True if the library should only load from the [Directory] instances, false
- *   if the library should not load from the [Directory] instances.
- * @author Alexander Capehart (OxygenCobalt)
+ * @param components The components of the path.
  */
-data class MusicDirectories(val dirs: List<Directory>, val shouldInclude: Boolean)
+@JvmInline
+value class Components private constructor(val components: List<String>) {
+    /** The name of the file/directory. */
+    val name: String?
+        get() = components.lastOrNull()
+
+    override fun toString() = unixString
+
+    /** Formats these components using the unix file separator (/) */
+    val unixString: String
+        get() = components.joinToString(File.separator)
+
+    /** Formats these components using the windows file separator (\). */
+    val windowsString: String
+        get() = components.joinToString("\\")
+
+    /**
+     * Returns a new [Components] instance with the last element of the path removed as a "parent"
+     * element of the original instance.
+     *
+     * @return The new [Components] instance, or the original instance if it's the root path.
+     */
+    fun parent() = Components(components.dropLast(1))
+
+    /**
+     * Returns a new [Components] instance with the given name appended to the end of the path as a
+     * "child" element of the original instance.
+     *
+     * @param name The name of the file/directory to append to the path.
+     */
+    fun child(name: String) =
+        if (name.isNotEmpty()) {
+            Components(components + name.trimSlashes())
+        } else {
+            this
+        }
+
+    /**
+     * Removes the first [n] elements of the path, effectively resulting in a path that is n levels
+     * deep.
+     *
+     * @param n The number of elements to remove.
+     * @return The new [Components] instance.
+     */
+    fun depth(n: Int) = Components(components.drop(n))
+
+    /**
+     * Concatenates this [Components] instance with another.
+     *
+     * @param other The [Components] instance to concatenate with.
+     * @return The new [Components] instance.
+     */
+    fun child(other: Components) = Components(components + other.components)
+
+    /**
+     * Returns the given [Components] has a prefix equal to this [Components] instance. Effectively,
+     * as if the given [Components] instance was a child of this [Components] instance.
+     */
+    fun contains(other: Components): Boolean {
+        if (other.components.size < components.size) {
+            return false
+        }
+
+        return components == other.components.take(components.size)
+    }
+
+    companion object {
+        /**
+         * Parses a path string into a [Components] instance by the unix path separator (/).
+         *
+         * @param path The path string to parse.
+         * @return The [Components] instance.
+         */
+        fun parseUnix(path: String) =
+            Components(path.trimSlashes().split(File.separatorChar).filter { it.isNotEmpty() })
+
+        /**
+         * Parses a path string into a [Components] instance by the windows path separator.
+         *
+         * @param path The path string to parse.
+         * @return The [Components] instance.
+         */
+        fun parseWindows(path: String) =
+            Components(path.trimSlashes().split('\\').filter { it.isNotEmpty() })
+
+        /**
+         * Parses a path string into a [Components] instance by any path separator, either unix or
+         * windows. This is useful for parsing paths when you can't determine the separators any
+         * other way, however also risks mangling the paths if they use unix-style escapes.
+         *
+         * @param path The path string to parse.
+         * @return The [Components] instance.
+         */
+        fun parseAny(path: String) =
+            Components(
+                path.trimSlashes().split(File.separatorChar, '\\').filter { it.isNotEmpty() })
+
+        private fun String.trimSlashes() = trimStart(File.separatorChar).trimEnd(File.separatorChar)
+    }
+}
+
+/** A wrapper around [StorageManager] that provides instances of the [Volume] interface. */
+interface VolumeManager {
+    /**
+     * The internal storage volume of the device.
+     *
+     * @see StorageManager.getPrimaryStorageVolume
+     */
+    fun getInternalVolume(): Volume.Internal
+
+    /**
+     * The list of [Volume]s currently recognized by [StorageManager].
+     *
+     * @see StorageManager.getStorageVolumes
+     */
+    fun getVolumes(): List<Volume>
+}
+
+class VolumeManagerImpl @Inject constructor(private val storageManager: StorageManager) :
+    VolumeManager {
+    override fun getInternalVolume(): Volume.Internal =
+        InternalVolumeImpl(storageManager.primaryStorageVolume)
+
+    override fun getVolumes() =
+        storageManager.storageVolumesCompat.map {
+            if (it.isInternalCompat) {
+                InternalVolumeImpl(it)
+            } else {
+                ExternalVolumeImpl(it)
+            }
+        }
+
+    private data class InternalVolumeImpl(val storageVolume: StorageVolume) : Volume.Internal {
+        override val mediaStoreName
+            get() = storageVolume.mediaStoreVolumeNameCompat
+
+        override val components
+            get() = storageVolume.directoryCompat?.let(Components::parseUnix)
+
+        override fun resolveName(context: Context) = storageVolume.getDescriptionCompat(context)
+    }
+
+    private data class ExternalVolumeImpl(val storageVolume: StorageVolume) : Volume.External {
+        override val id
+            get() = storageVolume.uuidCompat
+
+        override val mediaStoreName
+            get() = storageVolume.mediaStoreVolumeNameCompat
+
+        override val components
+            get() = storageVolume.directoryCompat?.let(Components::parseUnix)
+
+        override fun resolveName(context: Context) = storageVolume.getDescriptionCompat(context)
+    }
+}
 
 /**
  * A mime type of a file. Only intended for display.

app/src/main/java/org/oxycblt/auxio/music/fs/FsModule.kt

@@ -18,18 +18,43 @@
  
 package org.oxycblt.auxio.music.fs
 
+import android.content.ContentResolver
 import android.content.Context
+import android.os.storage.StorageManager
+import dagger.Binds
 import dagger.Module
 import dagger.Provides
 import dagger.hilt.InstallIn
 import dagger.hilt.android.qualifiers.ApplicationContext
 import dagger.hilt.components.SingletonComponent
-import org.oxycblt.auxio.music.MusicSettings
+import org.oxycblt.auxio.util.getSystemServiceCompat
 
 @Module
 @InstallIn(SingletonComponent::class)
 class FsModule {
     @Provides
-    fun mediaStoreExtractor(@ApplicationContext context: Context, musicSettings: MusicSettings) =
-        MediaStoreExtractor.from(context, musicSettings)
+    fun volumeManager(@ApplicationContext context: Context): VolumeManager =
+        VolumeManagerImpl(context.getSystemServiceCompat(StorageManager::class))
+
+    @Provides
+    fun mediaStoreExtractor(
+        @ApplicationContext context: Context,
+        mediaStorePathInterpreterFactory: MediaStorePathInterpreter.Factory
+    ) = MediaStoreExtractor.from(context, mediaStorePathInterpreterFactory)
+
+    @Provides
+    fun mediaStorePathInterpreterFactory(
+        volumeManager: VolumeManager
+    ): MediaStorePathInterpreter.Factory = MediaStorePathInterpreter.Factory.from(volumeManager)
+
+    @Provides
+    fun contentResolver(@ApplicationContext context: Context): ContentResolver =
+        context.contentResolverSafe
+}
+
+@Module
+@InstallIn(SingletonComponent::class)
+interface FsBindsModule {
+    @Binds
+    fun documentPathFactory(documentTreePathFactory: DocumentPathFactoryImpl): DocumentPathFactory
 }

app/src/main/java/org/oxycblt/auxio/music/fs/MediaStoreExtractor.kt

@@ -21,22 +21,19 @@ package org.oxycblt.auxio.music.fs
 import android.content.Context
 import android.database.Cursor
 import android.os.Build
-import android.os.storage.StorageManager
 import android.provider.MediaStore
-import androidx.annotation.RequiresApi
 import androidx.core.database.getIntOrNull
 import androidx.core.database.getStringOrNull
-import java.io.File
 import kotlinx.coroutines.channels.Channel
 import kotlinx.coroutines.yield
-import org.oxycblt.auxio.music.MusicSettings
 import org.oxycblt.auxio.music.cache.Cache
 import org.oxycblt.auxio.music.device.RawSong
+import org.oxycblt.auxio.music.dirs.MusicDirectories
 import org.oxycblt.auxio.music.info.Date
 import org.oxycblt.auxio.music.metadata.parseId3v2PositionField
 import org.oxycblt.auxio.music.metadata.transformPositionField
-import org.oxycblt.auxio.util.getSystemServiceCompat
 import org.oxycblt.auxio.util.logD
+import org.oxycblt.auxio.util.sendWithTimeout
 
 /**
  * The layer that loads music from the [MediaStore] database. This is an intermediate step in the
@@ -50,9 +47,11 @@ interface MediaStoreExtractor {
     /**
      * Query the media database.
      *
+     * @param constraints Configuration parameter to restrict what music should be ignored when
+     *   querying.
      * @return A new [Query] returned from the media database.
      */
-    suspend fun query(): Query
+    suspend fun query(constraints: Constraints): Query
 
     /**
      * Consume the [Cursor] loaded after [query].
@@ -79,83 +78,87 @@ interface MediaStoreExtractor {
 
         fun close()
 
-        fun populateFileInfo(rawSong: RawSong)
+        fun populateFileInfo(rawSong: RawSong): Boolean
 
         fun populateTags(rawSong: RawSong)
     }
 
+    data class Constraints(val excludeNonMusic: Boolean, val musicDirs: MusicDirectories)
+
     companion object {
         /**
          * Create a framework-backed instance.
          *
          * @param context [Context] required.
-         * @param musicSettings [MusicSettings] required.
+         * @param volumeManager [VolumeManager] required.
          * @return A new [MediaStoreExtractor] that will work best on the device's API level.
          */
-        fun from(context: Context, musicSettings: MusicSettings): MediaStoreExtractor =
-            when {
-                Build.VERSION.SDK_INT >= Build.VERSION_CODES.R ->
-                    Api30MediaStoreExtractor(context, musicSettings)
-                Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q ->
-                    Api29MediaStoreExtractor(context, musicSettings)
-                else -> Api21MediaStoreExtractor(context, musicSettings)
-            }
+        fun from(
+            context: Context,
+            pathInterpreterFactory: MediaStorePathInterpreter.Factory
+        ): MediaStoreExtractor {
+            val tagInterpreterFactory =
+                when {
+                    Build.VERSION.SDK_INT >= Build.VERSION_CODES.R -> Api30TagInterpreter.Factory()
+                    else -> Api21TagInterpreter.Factory()
+                }
+
+            return MediaStoreExtractorImpl(context, pathInterpreterFactory, tagInterpreterFactory)
+        }
     }
 }
 
-private abstract class BaseMediaStoreExtractor(
-    protected val context: Context,
-    private val musicSettings: MusicSettings
+private class MediaStoreExtractorImpl(
+    private val context: Context,
+    private val mediaStorePathInterpreterFactory: MediaStorePathInterpreter.Factory,
+    private val tagInterpreterFactory: TagInterpreter.Factory
 ) : MediaStoreExtractor {
-    final override suspend fun query(): MediaStoreExtractor.Query {
+    override suspend fun query(
+        constraints: MediaStoreExtractor.Constraints
+    ): MediaStoreExtractor.Query {
         val start = System.currentTimeMillis()
 
-        val args = mutableListOf<String>()
-        var selector = BASE_SELECTOR
+        val projection =
+            BASE_PROJECTION +
+                mediaStorePathInterpreterFactory.projection +
+                tagInterpreterFactory.projection
+        var uniSelector = BASE_SELECTOR
+        var uniArgs = listOf<String>()
 
         // Filter out audio that is not music, if enabled.
-        if (musicSettings.excludeNonMusic) {
+        if (constraints.excludeNonMusic) {
             logD("Excluding non-music")
-            selector += " AND ${MediaStore.Audio.AudioColumns.IS_MUSIC}=1"
+            uniSelector += " AND ${MediaStore.Audio.AudioColumns.IS_MUSIC}=1"
         }
 
         // Set up the projection to follow the music directory configuration.
-        val dirs = musicSettings.musicDirs
-        if (dirs.dirs.isNotEmpty()) {
-            selector += " AND "
-            if (!dirs.shouldInclude) {
-                logD("Excluding directories in selector")
-                // Without a NOT, the query will be restricted to the specified paths, resulting
-                // in the "Include" mode. With a NOT, the specified paths will not be included,
-                // resulting in the "Exclude" mode.
-                selector += "NOT "
-            }
-            selector += " ("
-
-            // Specifying the paths to filter is version-specific, delegate to the concrete
-            // implementations.
-            for (i in dirs.dirs.indices) {
-                if (addDirToSelector(dirs.dirs[i], args)) {
-                    selector +=
-                        if (i < dirs.dirs.lastIndex) {
-                            "$dirSelectorTemplate OR "
-                        } else {
-                            dirSelectorTemplate
-                        }
+        if (constraints.musicDirs.dirs.isNotEmpty()) {
+            val pathSelector =
+                mediaStorePathInterpreterFactory.createSelector(constraints.musicDirs.dirs)
+            if (pathSelector != null) {
+                logD("Must select for directories")
+                uniSelector += " AND "
+                if (!constraints.musicDirs.shouldInclude) {
+                    logD("Excluding directories in selector")
+                    // Without a NOT, the query will be restricted to the specified paths, resulting
+                    // in the "Include" mode. With a NOT, the specified paths will not be included,
+                    // resulting in the "Exclude" mode.
+                    uniSelector += "NOT "
                 }
+                uniSelector += " (${pathSelector.template})"
+                uniArgs = pathSelector.args
             }
-
-            selector += ')'
         }
 
         // Now we can actually query MediaStore.
-        logD("Starting song query [proj=${projection.toList()}, selector=$selector, args=$args]")
+        logD(
+            "Starting song query [proj=${projection.toList()}, selector=$uniSelector, args=$uniArgs]")
         val cursor =
             context.contentResolverSafe.safeQuery(
                 MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,
                 projection,
-                selector,
-                args.toTypedArray())
+                uniSelector,
+                uniArgs.toTypedArray())
         logD("Successfully queried for ${cursor.count} songs")
 
         val genreNamesMap = mutableMapOf<Long, String>()
@@ -193,10 +196,14 @@ private abstract class BaseMediaStoreExtractor(
 
         logD("Read ${genreNamesMap.values.distinct().size} genres from MediaStore")
         logD("Finished initialization in ${System.currentTimeMillis() - start}ms")
-        return wrapQuery(cursor, genreNamesMap)
+        return QueryImpl(
+            cursor,
+            mediaStorePathInterpreterFactory.wrap(cursor),
+            tagInterpreterFactory.wrap(cursor),
+            genreNamesMap)
     }
 
-    final override suspend fun consume(
+    override suspend fun consume(
         query: MediaStoreExtractor.Query,
         cache: Cache?,
         incompleteSongs: Channel<RawSong>,
@@ -204,12 +211,14 @@ private abstract class BaseMediaStoreExtractor(
     ) {
         while (query.moveToNext()) {
             val rawSong = RawSong()
-            query.populateFileInfo(rawSong)
+            if (!query.populateFileInfo(rawSong)) {
+                continue
+            }
             if (cache?.populate(rawSong) == true) {
-                completeSongs.send(rawSong)
+                completeSongs.sendWithTimeout(rawSong)
             } else {
                 query.populateTags(rawSong)
-                incompleteSongs.send(rawSong)
+                incompleteSongs.sendWithTimeout(rawSong)
             }
             yield()
         }
@@ -218,60 +227,14 @@ private abstract class BaseMediaStoreExtractor(
         query.close()
     }
 
-    /**
-     * The database columns available to all android versions supported by Auxio. Concrete
-     * implementations can extend this projection to add version-specific columns.
-     */
-    protected open val projection: Array<String>
-        get() =
-            arrayOf(
-                // These columns are guaranteed to work on all versions of android
-                MediaStore.Audio.AudioColumns._ID,
-                MediaStore.Audio.AudioColumns.DATE_ADDED,
-                MediaStore.Audio.AudioColumns.DATE_MODIFIED,
-                MediaStore.Audio.AudioColumns.DISPLAY_NAME,
-                MediaStore.Audio.AudioColumns.SIZE,
-                MediaStore.Audio.AudioColumns.DURATION,
-                MediaStore.Audio.AudioColumns.MIME_TYPE,
-                MediaStore.Audio.AudioColumns.TITLE,
-                MediaStore.Audio.AudioColumns.YEAR,
-                MediaStore.Audio.AudioColumns.ALBUM,
-                MediaStore.Audio.AudioColumns.ALBUM_ID,
-                MediaStore.Audio.AudioColumns.ARTIST,
-                AUDIO_COLUMN_ALBUM_ARTIST)
-
-    /**
-     * The companion template to add to the projection's selector whenever arguments are added by
-     * [addDirToSelector].
-     *
-     * @see addDirToSelector
-     */
-    protected abstract val dirSelectorTemplate: String
-
-    /**
-     * Add a [Directory] to the given list of projection selector arguments.
-     *
-     * @param dir The [Directory] to add.
-     * @param args The destination list to append selector arguments to that are analogous to the
-     *   given [Directory].
-     * @return true if the [Directory] was added, false otherwise.
-     * @see dirSelectorTemplate
-     */
-    protected abstract fun addDirToSelector(dir: Directory, args: MutableList<String>): Boolean
-
-    protected abstract fun wrapQuery(
-        cursor: Cursor,
-        genreNamesMap: Map<Long, String>
-    ): MediaStoreExtractor.Query
-
-    abstract class Query(
-        protected val cursor: Cursor,
+    class QueryImpl(
+        private val cursor: Cursor,
+        private val mediaStorePathInterpreter: MediaStorePathInterpreter,
+        private val tagInterpreter: TagInterpreter,
         private val genreNamesMap: Map<Long, String>
     ) : MediaStoreExtractor.Query {
         private val idIndex = cursor.getColumnIndexOrThrow(MediaStore.Audio.AudioColumns._ID)
         private val titleIndex = cursor.getColumnIndexOrThrow(MediaStore.Audio.AudioColumns.TITLE)
-        private val displayNameIndex =
-            cursor.getColumnIndexOrThrow(MediaStore.Audio.AudioColumns.DISPLAY_NAME)
         private val mimeTypeIndex =
             cursor.getColumnIndexOrThrow(MediaStore.Audio.AudioColumns.MIME_TYPE)
         private val sizeIndex = cursor.getColumnIndexOrThrow(MediaStore.Audio.AudioColumns.SIZE)
@@ -288,21 +251,20 @@ private abstract class BaseMediaStoreExtractor(
         private val artistIndex = cursor.getColumnIndexOrThrow(MediaStore.Audio.AudioColumns.ARTIST)
         private val albumArtistIndex = cursor.getColumnIndexOrThrow(AUDIO_COLUMN_ALBUM_ARTIST)
 
-        final override val projectedTotal = cursor.count
+        override val projectedTotal = cursor.count
 
-        final override fun moveToNext() = cursor.moveToNext()
+        override fun moveToNext() = cursor.moveToNext()
 
-        final override fun close() = cursor.close()
+        override fun close() = cursor.close()
 
-        override fun populateFileInfo(rawSong: RawSong) {
+        override fun populateFileInfo(rawSong: RawSong): Boolean {
             rawSong.mediaStoreId = cursor.getLong(idIndex)
             rawSong.dateAdded = cursor.getLong(dateAddedIndex)
             rawSong.dateModified = cursor.getLong(dateModifiedIndex)
-            // Try to use the DISPLAY_NAME column to obtain a (probably sane) file name
-            // from the android system.
-            rawSong.fileName = cursor.getStringOrNull(displayNameIndex)
             rawSong.extensionMimeType = cursor.getString(mimeTypeIndex)
             rawSong.albumMediaStoreId = cursor.getLong(albumIdIndex)
+            rawSong.path = mediaStorePathInterpreter.extract() ?: return false
+            return true
         }
 
         override fun populateTags(rawSong: RawSong) {
@@ -319,7 +281,8 @@ private abstract class BaseMediaStoreExtractor(
             // A non-existent album name should theoretically be the name of the folder it contained
             // in, but in practice it is more often "0" (as in /storage/emulated/0), even when it
             // the file is not actually in the root internal storage directory. We can't do
-            // anything to fix this, really.
+            // anything to fix this, really. We also can't really filter it out, since how can we
+            // know when it corresponds to the folder and not, say, Low Roar's breakout album "0"?
             rawSong.albumName = cursor.getString(albumIndex)
             // Android does not make a non-existent artist tag null, it instead fills it in
             // as <unknown>, which makes absolutely no sense given how other columns default
@@ -333,16 +296,12 @@ private abstract class BaseMediaStoreExtractor(
             cursor.getStringOrNull(albumArtistIndex)?.let { rawSong.albumArtistNames = listOf(it) }
             // Get the genre value we had to query for in initialization
             genreNamesMap[rawSong.mediaStoreId]?.let { rawSong.genreNames = listOf(it) }
+            // Get version/device-specific tags
+            tagInterpreter.populate(rawSong)
         }
     }
 
     companion object {
-        /**
-         * The base selector that works across all versions of android. Does not exclude
-         * directories.
-         */
-        private const val BASE_SELECTOR = "NOT ${MediaStore.Audio.Media.SIZE}=0"
-
         /**
          * The album artist of a song. This column has existed since at least API 21, but until API
          * 30 it was an undocumented extension for Google Play Music. This column will work on all
@@ -356,259 +315,122 @@ private abstract class BaseMediaStoreExtractor(
          * until API 29. This will work on all versions that Auxio supports.
          */
         @Suppress("InlinedApi") private const val VOLUME_EXTERNAL = MediaStore.VOLUME_EXTERNAL
-    }
-}
 
-// Note: The separation between version-specific backends may not be the cleanest. To preserve
-// speed, we only want to add redundancy on known issues, not with possible issues.
+        /**
+         * The base selector that works across all versions of android. Does not exclude
+         * directories.
+         */
+        private const val BASE_SELECTOR = "NOT ${MediaStore.Audio.Media.SIZE}=0"
 
-private class Api21MediaStoreExtractor(context: Context, musicSettings: MusicSettings) :
-    BaseMediaStoreExtractor(context, musicSettings) {
-    override val projection: Array<String>
-        get() =
-            super.projection +
-                arrayOf(
-                    MediaStore.Audio.AudioColumns.TRACK,
-                    // Below API 29, we are restricted to the absolute path (Called DATA by
-                    // MediaStore) when working with audio files.
-                    MediaStore.Audio.AudioColumns.DATA)
-
-    // The selector should be configured to convert the given directories instances to their
-    // absolute paths and then compare them to DATA.
-
-    override val dirSelectorTemplate: String
-        get() = "${MediaStore.Audio.Media.DATA} LIKE ?"
-
-    override fun addDirToSelector(dir: Directory, args: MutableList<String>): Boolean {
-        // "%" signifies to accept any DATA value that begins with the Directory's path,
-        // thus recursively filtering all files in the directory.
-        args.add("${dir.volume.directoryCompat ?: return false}/${dir.relativePath}%")
-        return true
-    }
-
-    override fun wrapQuery(
-        cursor: Cursor,
-        genreNamesMap: Map<Long, String>,
-    ): MediaStoreExtractor.Query =
-        Query(cursor, genreNamesMap, context.getSystemServiceCompat(StorageManager::class))
-
-    private class Query(
-        cursor: Cursor,
-        genreNamesMap: Map<Long, String>,
-        storageManager: StorageManager
-    ) : BaseMediaStoreExtractor.Query(cursor, genreNamesMap) {
-        // Set up cursor indices for later use.
-        private val trackIndex = cursor.getColumnIndexOrThrow(MediaStore.Audio.AudioColumns.TRACK)
-        private val dataIndex = cursor.getColumnIndexOrThrow(MediaStore.Audio.AudioColumns.DATA)
-        private val volumes = storageManager.storageVolumesCompat
-
-        override fun populateFileInfo(rawSong: RawSong) {
-            super.populateFileInfo(rawSong)
-
-            val data = cursor.getString(dataIndex)
-            // On some OEM devices below API 29, DISPLAY_NAME may not be present. I assume
-            // that this only applies to below API 29, as beyond API 29, this column not being
-            // present would completely break the scoped storage system. Fill it in with DATA
-            // if it's not available.
-            if (rawSong.fileName == null) {
-                rawSong.fileName = data.substringAfterLast(File.separatorChar, "").ifEmpty { null }
-            }
-
-            // Find the volume that transforms the DATA column into a relative path. This is
-            // the Directory we will use.
-            val rawPath = data.substringBeforeLast(File.separatorChar)
-            for (volume in volumes) {
-                val volumePath = volume.directoryCompat ?: continue
-                val strippedPath = rawPath.removePrefix(volumePath)
-                if (strippedPath != rawPath) {
-                    rawSong.directory = Directory.from(volume, strippedPath)
-                    break
-                }
-            }
-        }
-
-        override fun populateTags(rawSong: RawSong) {
-            super.populateTags(rawSong)
-            // See unpackTrackNo/unpackDiscNo for an explanation
-            // of how this column is set up.
-            val rawTrack = cursor.getIntOrNull(trackIndex)
-            if (rawTrack != null) {
-                rawTrack.unpackTrackNo()?.let { rawSong.track = it }
-                rawTrack.unpackDiscNo()?.let { rawSong.disc = it }
-            }
-        }
+        /** The base projection that works across all versions of android. */
+        private val BASE_PROJECTION =
+            arrayOf(
+                // These columns are guaranteed to work on all versions of android
+                MediaStore.Audio.AudioColumns._ID,
+                MediaStore.Audio.AudioColumns.DATE_ADDED,
+                MediaStore.Audio.AudioColumns.DATE_MODIFIED,
+                MediaStore.Audio.AudioColumns.SIZE,
+                MediaStore.Audio.AudioColumns.DURATION,
+                MediaStore.Audio.AudioColumns.MIME_TYPE,
+                MediaStore.Audio.AudioColumns.TITLE,
+                MediaStore.Audio.AudioColumns.YEAR,
+                MediaStore.Audio.AudioColumns.ALBUM,
+                MediaStore.Audio.AudioColumns.ALBUM_ID,
+                MediaStore.Audio.AudioColumns.ARTIST,
+                AUDIO_COLUMN_ALBUM_ARTIST)
     }
 }
 
 /**
- * A [BaseMediaStoreExtractor] that implements common behavior supported from API 29 onwards.
+ * Wrapper around a [Cursor] that interprets certain tags on a per-API basis.
  *
- * @param context [Context] required to query the media database.
  * @author Alexander Capehart (OxygenCobalt)
  */
-@RequiresApi(Build.VERSION_CODES.Q)
-private abstract class BaseApi29MediaStoreExtractor(
-    context: Context,
-    musicSettings: MusicSettings
-) : BaseMediaStoreExtractor(context, musicSettings) {
-    override val projection: Array<String>
-        get() =
-            super.projection +
-                arrayOf(
-                    // After API 29, we now have access to the volume name and relative
-                    // path, which simplifies working with Paths significantly.
-                    MediaStore.Audio.AudioColumns.VOLUME_NAME,
-                    MediaStore.Audio.AudioColumns.RELATIVE_PATH)
+private sealed interface TagInterpreter {
+    /**
+     * Populate the [RawSong] with version-specific tags.
+     *
+     * @param rawSong The [RawSong] to populate.
+     */
+    fun populate(rawSong: RawSong)
 
-    // The selector should be configured to compare both the volume name and relative path
-    // of the given directories, albeit with some conversion to the analogous MediaStore
-    // column values.
+    interface Factory {
+        /** The columns that must be added to a query to support this interpreter. */
+        val projection: Array<String>
 
-    override val dirSelectorTemplate: String
-        get() =
-            "(${MediaStore.Audio.AudioColumns.VOLUME_NAME} LIKE ? " +
-                "AND ${MediaStore.Audio.AudioColumns.RELATIVE_PATH} LIKE ?)"
-
-    override fun addDirToSelector(dir: Directory, args: MutableList<String>): Boolean {
-        // MediaStore uses a different naming scheme for it's volume column convert this
-        // directory's volume to it.
-        args.add(dir.volume.mediaStoreVolumeNameCompat ?: return false)
-        // "%" signifies to accept any DATA value that begins with the Directory's path,
-        // thus recursively filtering all files in the directory.
-        args.add("${dir.relativePath}%")
-        return true
-    }
-
-    abstract class Query(
-        cursor: Cursor,
-        genreNamesMap: Map<Long, String>,
-        storageManager: StorageManager
-    ) : BaseMediaStoreExtractor.Query(cursor, genreNamesMap) {
-        private val volumeIndex =
-            cursor.getColumnIndexOrThrow(MediaStore.Audio.AudioColumns.VOLUME_NAME)
-        private val relativePathIndex =
-            cursor.getColumnIndexOrThrow(MediaStore.Audio.AudioColumns.RELATIVE_PATH)
-        private val volumes = storageManager.storageVolumesCompat
-
-        final override fun populateFileInfo(rawSong: RawSong) {
-            super.populateFileInfo(rawSong)
-            // Find the StorageVolume whose MediaStore name corresponds to this song.
-            // This is combined with the plain relative path column to create the directory.
-            val volumeName = cursor.getString(volumeIndex)
-            val relativePath = cursor.getString(relativePathIndex)
-            val volume = volumes.find { it.mediaStoreVolumeNameCompat == volumeName }
-            if (volume != null) {
-                rawSong.directory = Directory.from(volume, relativePath)
-            }
-        }
+        /**
+         * Wrap a [Cursor] with this interpreter. This cursor should be the result of a query
+         * containing the columns specified by [projection].
+         *
+         * @param cursor The [Cursor] to wrap.
+         * @return A new [TagInterpreter] that will work best on the device's API level.
+         */
+        fun wrap(cursor: Cursor): TagInterpreter
     }
 }
 
-/**
- * A [BaseMediaStoreExtractor] that completes the music loading process in a way compatible with at
- * API 29.
- *
- * @param context [Context] required to query the media database.
- * @author Alexander Capehart (OxygenCobalt)
- */
-@RequiresApi(Build.VERSION_CODES.Q)
-private class Api29MediaStoreExtractor(context: Context, musicSettings: MusicSettings) :
-    BaseApi29MediaStoreExtractor(context, musicSettings) {
+private class Api21TagInterpreter(private val cursor: Cursor) : TagInterpreter {
+    private val trackIndex = cursor.getColumnIndexOrThrow(MediaStore.Audio.AudioColumns.TRACK)
 
-    override val projection: Array<String>
-        get() = super.projection + arrayOf(MediaStore.Audio.AudioColumns.TRACK)
-
-    override fun wrapQuery(
-        cursor: Cursor,
-        genreNamesMap: Map<Long, String>
-    ): MediaStoreExtractor.Query =
-        Query(cursor, genreNamesMap, context.getSystemServiceCompat(StorageManager::class))
-
-    private class Query(
-        cursor: Cursor,
-        genreNamesMap: Map<Long, String>,
-        storageManager: StorageManager
-    ) : BaseApi29MediaStoreExtractor.Query(cursor, genreNamesMap, storageManager) {
-        private val trackIndex = cursor.getColumnIndexOrThrow(MediaStore.Audio.AudioColumns.TRACK)
-
-        override fun populateTags(rawSong: RawSong) {
-            super.populateTags(rawSong)
-            // This extractor is volume-aware, but does not support the modern track columns.
-            // Use the old column instead. See unpackTrackNo/unpackDiscNo for an explanation
-            // of how this column is set up.
-            val rawTrack = cursor.getIntOrNull(trackIndex)
-            if (rawTrack != null) {
-                rawTrack.unpackTrackNo()?.let { rawSong.track = it }
-                rawTrack.unpackDiscNo()?.let { rawSong.disc = it }
-            }
+    override fun populate(rawSong: RawSong) {
+        // See unpackTrackNo/unpackDiscNo for an explanation
+        // of how this column is set up.
+        val rawTrack = cursor.getIntOrNull(trackIndex)
+        if (rawTrack != null) {
+            rawTrack.unpackTrackNo()?.let { rawSong.track = it }
+            rawTrack.unpackDiscNo()?.let { rawSong.disc = it }
         }
     }
+
+    class Factory : TagInterpreter.Factory {
+        override val projection: Array<String>
+            get() = arrayOf(MediaStore.Audio.AudioColumns.TRACK)
+
+        override fun wrap(cursor: Cursor): TagInterpreter = Api21TagInterpreter(cursor)
+    }
+
+    /**
+     * Unpack the track number from a combined track + disc [Int] field. These fields appear within
+     * MediaStore's TRACK column, and combine the track and disc value into a single field where the
+     * disc number is the 4th+ digit.
+     *
+     * @return The track number extracted from the combined integer value, or null if the value was
+     *   zero.
+     */
+    private fun Int.unpackTrackNo() = transformPositionField(mod(1000), null)
+
+    /**
+     * Unpack the disc number from a combined track + disc [Int] field. These fields appear within
+     * MediaStore's TRACK column, and combine the track and disc value into a single field where the
+     * disc number is the 4th+ digit.
+     *
+     * @return The disc number extracted from the combined integer field, or null if the value was
+     *   zero.
+     */
+    private fun Int.unpackDiscNo() = transformPositionField(div(1000), null)
 }
 
-/**
- * A [BaseMediaStoreExtractor] that completes the music loading process in a way compatible from API
- * 30 onwards.
- *
- * @param context [Context] required to query the media database.
- * @author Alexander Capehart (OxygenCobalt)
- */
-@RequiresApi(Build.VERSION_CODES.R)
-private class Api30MediaStoreExtractor(context: Context, musicSettings: MusicSettings) :
-    BaseApi29MediaStoreExtractor(context, musicSettings) {
-    override val projection: Array<String>
-        get() =
-            super.projection +
+private class Api30TagInterpreter(private val cursor: Cursor) : TagInterpreter {
+    private val trackIndex =
+        cursor.getColumnIndexOrThrow(MediaStore.Audio.AudioColumns.CD_TRACK_NUMBER)
+    private val discIndex = cursor.getColumnIndexOrThrow(MediaStore.Audio.AudioColumns.DISC_NUMBER)
+
+    override fun populate(rawSong: RawSong) {
+        // Both CD_TRACK_NUMBER and DISC_NUMBER tend to be formatted as they are in
+        // the tag itself, which is to say that it is formatted as NN/TT tracks, where
+        // N is the number and T is the total. Parse the number while ignoring the
+        // total, as we have no use for it.
+        cursor.getStringOrNull(trackIndex)?.parseId3v2PositionField()?.let { rawSong.track = it }
+        cursor.getStringOrNull(discIndex)?.parseId3v2PositionField()?.let { rawSong.disc = it }
+    }
+
+    class Factory : TagInterpreter.Factory {
+        override val projection: Array<String>
+            get() =
                 arrayOf(
-                    // API 30 grant us access to the superior CD_TRACK_NUMBER and DISC_NUMBER
-                    // fields, which take the place of TRACK.
                     MediaStore.Audio.AudioColumns.CD_TRACK_NUMBER,
                     MediaStore.Audio.AudioColumns.DISC_NUMBER)
 
-    override fun wrapQuery(
-        cursor: Cursor,
-        genreNamesMap: Map<Long, String>
-    ): MediaStoreExtractor.Query =
-        Query(cursor, genreNamesMap, context.getSystemServiceCompat(StorageManager::class))
-
-    private class Query(
-        cursor: Cursor,
-        genreNamesMap: Map<Long, String>,
-        storageManager: StorageManager
-    ) : BaseApi29MediaStoreExtractor.Query(cursor, genreNamesMap, storageManager) {
-        private val trackIndex =
-            cursor.getColumnIndexOrThrow(MediaStore.Audio.AudioColumns.CD_TRACK_NUMBER)
-        private val discIndex =
-            cursor.getColumnIndexOrThrow(MediaStore.Audio.AudioColumns.DISC_NUMBER)
-
-        override fun populateTags(rawSong: RawSong) {
-            super.populateTags(rawSong)
-            // Both CD_TRACK_NUMBER and DISC_NUMBER tend to be formatted as they are in
-            // the tag itself, which is to say that it is formatted as NN/TT tracks, where
-            // N is the number and T is the total. Parse the number while ignoring the
-            // total, as we have no use for it.
-            cursor.getStringOrNull(trackIndex)?.parseId3v2PositionField()?.let {
-                rawSong.track = it
-            }
-            cursor.getStringOrNull(discIndex)?.parseId3v2PositionField()?.let { rawSong.disc = it }
-        }
+        override fun wrap(cursor: Cursor): TagInterpreter = Api30TagInterpreter(cursor)
     }
 }
-
-/**
- * Unpack the track number from a combined track + disc [Int] field. These fields appear within
- * MediaStore's TRACK column, and combine the track and disc value into a single field where the
- * disc number is the 4th+ digit.
- *
- * @return The track number extracted from the combined integer value, or null if the value was
- *   zero.
- */
-private fun Int.unpackTrackNo() = transformPositionField(mod(1000), null)
-
-/**
- * Unpack the disc number from a combined track + disc [Int] field. These fields appear within
- * MediaStore's TRACK column, and combine the track and disc value into a single field where the
- * disc number is the 4th+ digit.
- *
- * @return The disc number extracted from the combined integer field, or null if the value was zero.
- */
-private fun Int.unpackDiscNo() = transformPositionField(div(1000), null)

app/src/main/java/org/oxycblt/auxio/music/fs/MediaStorePathInterpreter.kt

@@ -0,0 +1,237 @@
+/*
+ * Copyright (c) 2024 Auxio Project
+ * MediaStorePathInterpreter.kt is part of Auxio.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
+package org.oxycblt.auxio.music.fs
+
+import android.database.Cursor
+import android.os.Build
+import android.provider.MediaStore
+
+/**
+ * Wrapper around a [Cursor] that interprets path information on a per-API/manufacturer basis.
+ *
+ * @author Alexander Capehart (OxygenCobalt)
+ */
+sealed interface MediaStorePathInterpreter {
+    /**
+     * Extract a [Path] from the wrapped [Cursor]. This should be called after the cursor has been
+     * moved to the row that should be interpreted.
+     *
+     * @return The [Path] instance, or null if the path could not be extracted.
+     */
+    fun extract(): Path?
+
+    interface Factory {
+        /** The columns that must be added to a query to support this interpreter. */
+        val projection: Array<String>
+
+        /**
+         * Wrap a [Cursor] with this interpreter. This cursor should be the result of a query
+         * containing the columns specified by [projection].
+         *
+         * @param cursor The [Cursor] to wrap.
+         * @return A new [MediaStorePathInterpreter] that will work best on the device's API level.
+         */
+        fun wrap(cursor: Cursor): MediaStorePathInterpreter
+
+        /**
+         * Create a selector that will filter the given paths. By default this will filter *to* the
+         * given paths, to exclude them, use a NOT.
+         *
+         * @param paths The paths to filter for.
+         * @return A selector that will filter to the given paths, or null if a selector could not
+         *   be created from the paths.
+         */
+        fun createSelector(paths: List<Path>): Selector?
+
+        /**
+         * A selector that will filter to the given paths.
+         *
+         * @param template The template to use for the selector.
+         * @param args The arguments to use for the selector.
+         * @see Factory.createSelector
+         */
+        data class Selector(val template: String, val args: List<String>)
+
+        companion object {
+            /**
+             * Create a [MediaStorePathInterpreter.Factory] that will work best on the device's API
+             * level.
+             *
+             * @param volumeManager The [VolumeManager] to use for volume information.
+             */
+            fun from(volumeManager: VolumeManager) =
+                when {
+                    // Huawei violates the API docs and prevents you from accessing the new path
+                    // fields without first granting access to them through SAF. Fall back to DATA
+                    // instead.
+                    Build.MANUFACTURER.equals("huawei", ignoreCase = true) ||
+                        Build.VERSION.SDK_INT < Build.VERSION_CODES.Q ->
+                        DataMediaStorePathInterpreter.Factory(volumeManager)
+                    else -> VolumeMediaStorePathInterpreter.Factory(volumeManager)
+                }
+        }
+    }
+}
+
+/**
+ * Wrapper around a [Cursor] that interprets the DATA column as a path. Create an instance with
+ * [Factory].
+ */
+private class DataMediaStorePathInterpreter
+private constructor(private val cursor: Cursor, volumeManager: VolumeManager) :
+    MediaStorePathInterpreter {
+    private val dataIndex = cursor.getColumnIndexOrThrow(MediaStore.Audio.AudioColumns.DATA)
+    private val volumes = volumeManager.getVolumes()
+
+    override fun extract(): Path? {
+        val data = Components.parseUnix(cursor.getString(dataIndex))
+
+        // Find the volume that transforms the DATA column into a relative path. This is
+        // the Directory we will use.
+        for (volume in volumes) {
+            val volumePath = volume.components ?: continue
+            if (volumePath.contains(data)) {
+                return Path(volume, data.depth(volumePath.components.size))
+            }
+        }
+
+        return null
+    }
+
+    /**
+     * Factory for [DataMediaStorePathInterpreter].
+     *
+     * @param volumeManager The [VolumeManager] to use for volume information.
+     */
+    class Factory(private val volumeManager: VolumeManager) : MediaStorePathInterpreter.Factory {
+        override val projection: Array<String>
+            get() =
+                arrayOf(
+                    MediaStore.Audio.AudioColumns.DISPLAY_NAME, MediaStore.Audio.AudioColumns.DATA)
+
+        override fun createSelector(
+            paths: List<Path>
+        ): MediaStorePathInterpreter.Factory.Selector? {
+            val args = mutableListOf<String>()
+            var template = ""
+            for (i in paths.indices) {
+                val path = paths[i]
+                val volume = path.volume.components ?: continue
+                template +=
+                    if (i == 0) {
+                        "${MediaStore.Audio.AudioColumns.DATA} LIKE ?"
+                    } else {
+                        " OR ${MediaStore.Audio.AudioColumns.DATA} LIKE ?"
+                    }
+                args.add("${volume}${path.components}%")
+            }
+
+            if (template.isEmpty()) {
+                return null
+            }
+
+            return MediaStorePathInterpreter.Factory.Selector(template, args)
+        }
+
+        override fun wrap(cursor: Cursor): MediaStorePathInterpreter =
+            DataMediaStorePathInterpreter(cursor, volumeManager)
+    }
+}
+
+/**
+ * Wrapper around a [Cursor] that interprets the VOLUME_NAME, RELATIVE_PATH, and DISPLAY_NAME
+ * columns as a path. Create an instance with [Factory].
+ */
+private class VolumeMediaStorePathInterpreter
+private constructor(private val cursor: Cursor, volumeManager: VolumeManager) :
+    MediaStorePathInterpreter {
+    private val displayNameIndex =
+        cursor.getColumnIndexOrThrow(MediaStore.Audio.AudioColumns.DISPLAY_NAME)
+    private val volumeIndex =
+        cursor.getColumnIndexOrThrow(MediaStore.Audio.AudioColumns.VOLUME_NAME)
+    private val relativePathIndex =
+        cursor.getColumnIndexOrThrow(MediaStore.Audio.AudioColumns.RELATIVE_PATH)
+    private val volumes = volumeManager.getVolumes()
+
+    override fun extract(): Path? {
+        // Find the StorageVolume whose MediaStore name corresponds to it.
+        val volumeName = cursor.getString(volumeIndex)
+        val volume = volumes.find { it.mediaStoreName == volumeName } ?: return null
+        // Relative path does not include file name, must use DISPLAY_NAME and add it
+        // in manually.
+        val relativePath = cursor.getString(relativePathIndex)
+        val displayName = cursor.getString(displayNameIndex)
+        val components = Components.parseUnix(relativePath).child(displayName)
+        return Path(volume, components)
+    }
+
+    /**
+     * Factory for [VolumeMediaStorePathInterpreter].
+     *
+     * @param volumeManager The [VolumeManager] to use for volume information.
+     */
+    class Factory(private val volumeManager: VolumeManager) : MediaStorePathInterpreter.Factory {
+        override val projection: Array<String>
+            get() =
+                arrayOf(
+                    // After API 29, we now have access to the volume name and relative
+                    // path, which hopefully are more standard and less likely to break
+                    // compared to DATA.
+                    MediaStore.Audio.AudioColumns.DISPLAY_NAME,
+                    MediaStore.Audio.AudioColumns.VOLUME_NAME,
+                    MediaStore.Audio.AudioColumns.RELATIVE_PATH)
+
+        // The selector should be configured to compare both the volume name and relative path
+        // of the given directories, albeit with some conversion to the analogous MediaStore
+        // column values.
+
+        override fun createSelector(
+            paths: List<Path>
+        ): MediaStorePathInterpreter.Factory.Selector? {
+            val args = mutableListOf<String>()
+            var template = ""
+            for (i in paths.indices) {
+                val path = paths[i]
+                template =
+                    if (i == 0) {
+                        "(${MediaStore.Audio.AudioColumns.VOLUME_NAME} LIKE ? " +
+                            "AND ${MediaStore.Audio.AudioColumns.RELATIVE_PATH} LIKE ?)"
+                    } else {
+                        " OR (${MediaStore.Audio.AudioColumns.VOLUME_NAME} LIKE ? " +
+                            "AND ${MediaStore.Audio.AudioColumns.RELATIVE_PATH} LIKE ?)"
+                    }
+                // MediaStore uses a different naming scheme for it's volume column. Convert this
+                // directory's volume to it.
+                args.add(path.volume.mediaStoreName ?: return null)
+                // "%" signifies to accept any DATA value that begins with the Directory's path,
+                // thus recursively filtering all files in the directory.
+                args.add("${path.components}%")
+            }
+
+            if (template.isEmpty()) {
+                return null
+            }
+
+            return MediaStorePathInterpreter.Factory.Selector(template, args)
+        }
+
+        override fun wrap(cursor: Cursor): MediaStorePathInterpreter =
+            VolumeMediaStorePathInterpreter(cursor, volumeManager)
+    }
+}

app/src/main/java/org/oxycblt/auxio/music/info/Name.kt

@@ -23,12 +23,11 @@ import androidx.annotation.StringRes
 import androidx.annotation.VisibleForTesting
 import java.text.CollationKey
 import java.text.Collator
-import org.oxycblt.auxio.music.MusicSettings
 
 /**
  * The name of a music item.
  *
- * This class automatically implements
+ * This class automatically implements advanced sorting heuristics for music naming,
  *
  * @author Alexander Capehart
  */
@@ -80,7 +79,7 @@ sealed interface Name : Comparable<Name> {
                 is Unknown -> 1
             }
 
-        interface Factory {
+        sealed interface Factory {
             /**
              * Create a new instance of [Name.Known]
              *
@@ -88,22 +87,16 @@ sealed interface Name : Comparable<Name> {
              * @param sort The raw sort name obtained from the music item
              */
             fun parse(raw: String, sort: String?): Known
+        }
 
-            companion object {
-                /**
-                 * Creates a new instance from the **current state** of the given [MusicSettings]'s
-                 * user-defined name configuration.
-                 *
-                 * @param settings The [MusicSettings] to use.
-                 * @return A [Factory] instance reflecting the configuration state.
-                 */
-                fun from(settings: MusicSettings) =
-                    if (settings.intelligentSorting) {
-                        IntelligentKnownName.Factory
-                    } else {
-                        SimpleKnownName.Factory
-                    }
-            }
+        /** Produces a simple [Known] with basic sorting heuristics that are locale-independent. */
+        data object SimpleFactory : Factory {
+            override fun parse(raw: String, sort: String?) = SimpleKnownName(raw, sort)
+        }
+
+        /** Produces an intelligent [Known] with advanced, but more fragile heuristics. */
+        data object IntelligentFactory : Factory {
+            override fun parse(raw: String, sort: String?) = IntelligentKnownName(raw, sort)
         }
     }
 
@@ -137,7 +130,6 @@ private val punctRegex by lazy { Regex("[\\p{Punct}+]") }
  *
  * @author Alexander Capehart (OxygenCobalt)
  */
-@VisibleForTesting
 data class SimpleKnownName(override val raw: String, override val sort: String?) : Name.Known() {
     override val sortTokens = listOf(parseToken(sort ?: raw))
 
@@ -148,10 +140,6 @@ data class SimpleKnownName(override val raw: String, override val sort: String?)
         // Always use lexicographic mode since we aren't parsing any numeric components
         return SortToken(collationKey, SortToken.Type.LEXICOGRAPHIC)
     }
-
-    data object Factory : Name.Known.Factory {
-        override fun parse(raw: String, sort: String?) = SimpleKnownName(raw, sort)
-    }
 }
 
 /**
@@ -159,7 +147,6 @@ data class SimpleKnownName(override val raw: String, override val sort: String?)
  *
  * @author Alexander Capehart (OxygenCobalt)
  */
-@VisibleForTesting
 data class IntelligentKnownName(override val raw: String, override val sort: String?) :
     Name.Known() {
     override val sortTokens = parseTokens(sort ?: raw)
@@ -208,10 +195,6 @@ data class IntelligentKnownName(override val raw: String, override val sort: Str
         }
     }
 
-    data object Factory : Name.Known.Factory {
-        override fun parse(raw: String, sort: String?) = IntelligentKnownName(raw, sort)
-    }
-
     companion object {
         private val TOKEN_REGEX by lazy { Regex("(\\d+)|(\\D+)") }
     }

app/src/main/java/org/oxycblt/auxio/music/info/ReleaseType.kt

@@ -143,6 +143,18 @@ sealed interface ReleaseType {
             get() = R.string.lbl_mixtape
     }
 
+    /**
+     * A demo. These are usually [EP]-sized releases of music made to promote an Artist or a future
+     * release.
+     */
+    data object Demo : ReleaseType {
+        override val refinement: Refinement?
+            get() = null
+
+        override val stringRes: Int
+            get() = R.string.lbl_demo
+    }
+
     /** A specification of what kind of performance a particular release is. */
     enum class Refinement {
         /** A release consisting of a live performance */
@@ -220,6 +232,7 @@ sealed interface ReleaseType {
                 type.equals("dj-mix", true) -> Mix
                 type.equals("live", true) -> convertRefinement(Refinement.LIVE)
                 type.equals("remix", true) -> convertRefinement(Refinement.REMIX)
+                type.equals("demo", true) -> Demo
                 else -> convertRefinement(null)
             }
     }

app/src/main/java/org/oxycblt/auxio/music/metadata/Separators.kt

@@ -18,9 +18,6 @@
  
 package org.oxycblt.auxio.music.metadata
 
-import androidx.annotation.VisibleForTesting
-import org.oxycblt.auxio.music.MusicSettings
-
 /**
  * Defines the user-specified parsing of multi-value tags. This should be used to parse any tags
  * that may be delimited with a separator character.
@@ -45,15 +42,12 @@ interface Separators {
         const val AND = '&'
 
         /**
-         * Creates a new instance from the **current state** of the given [MusicSettings]'s
-         * user-defined separator configuration.
+         * Creates a new instance from a string of separator characters to use.
          *
-         * @param settings The [MusicSettings] to use.
-         * @return A new [Separators] instance reflecting the configuration state.
+         * @param chars The separator characters to use. Each character in the string will be
+         *   checked for when splitting a string list.
+         * @return A new [Separators] instance reflecting the separators.
          */
-        fun from(settings: MusicSettings) = from(settings.separators)
-
-        @VisibleForTesting
         fun from(chars: String) =
             if (chars.isNotEmpty()) {
                 CharSeparators(chars.toSet())

app/src/main/java/org/oxycblt/auxio/music/metadata/TagExtractor.kt

@@ -23,7 +23,9 @@ import javax.inject.Inject
 import kotlinx.coroutines.channels.Channel
 import kotlinx.coroutines.yield
 import org.oxycblt.auxio.music.device.RawSong
+import org.oxycblt.auxio.util.forEachWithTimeout
 import org.oxycblt.auxio.util.logD
+import org.oxycblt.auxio.util.sendWithTimeout
 
 /**
  * The extractor that leverages ExoPlayer's [MetadataRetriever] API to parse metadata. This is the
@@ -55,14 +57,14 @@ class TagExtractorImpl @Inject constructor(private val tagWorkerFactory: TagWork
 
         logD("Beginning primary extraction loop")
 
-        for (incompleteRawSong in incompleteSongs) {
+        incompleteSongs.forEachWithTimeout { incompleteRawSong ->
             spin@ while (true) {
                 for (i in tagWorkerPool.indices) {
                     val worker = tagWorkerPool[i]
                     if (worker != null) {
                         val completeRawSong = worker.poll()
                         if (completeRawSong != null) {
-                            completeSongs.send(completeRawSong)
+                            completeSongs.sendWithTimeout(completeRawSong)
                             yield()
                         } else {
                             continue
@@ -83,7 +85,7 @@ class TagExtractorImpl @Inject constructor(private val tagWorkerFactory: TagWork
                 if (task != null) {
                     val completeRawSong = task.poll()
                     if (completeRawSong != null) {
-                        completeSongs.send(completeRawSong)
+                        completeSongs.sendWithTimeout(completeRawSong)
                         tagWorkerPool[i] = null
                         yield()
                     } else {

app/src/main/java/org/oxycblt/auxio/music/system/IndexerService.kt

@@ -32,7 +32,6 @@ import javax.inject.Inject
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
-import kotlinx.coroutines.launch
 import org.oxycblt.auxio.BuildConfig
 import org.oxycblt.auxio.music.IndexingProgress
 import org.oxycblt.auxio.music.IndexingState
@@ -124,12 +123,11 @@ class IndexerService :
     // --- CONTROLLER CALLBACKS ---
 
     override fun requestIndex(withCache: Boolean) {
-        logD("Starting new indexing job")
+        logD("Starting new indexing job (previous=${currentIndexJob?.hashCode()})")
         // Cancel the previous music loading job.
         currentIndexJob?.cancel()
         // Start a new music loading job on a co-routine.
-        currentIndexJob =
-            indexScope.launch { musicRepository.index(this@IndexerService, withCache) }
+        currentIndexJob = musicRepository.index(this@IndexerService, withCache)
     }
 
     override val context = this

app/src/main/java/org/oxycblt/auxio/music/user/UserLibrary.kt

@@ -22,7 +22,6 @@ import java.lang.Exception
 import javax.inject.Inject
 import org.oxycblt.auxio.music.Music
 import org.oxycblt.auxio.music.MusicRepository
-import org.oxycblt.auxio.music.MusicSettings
 import org.oxycblt.auxio.music.Playlist
 import org.oxycblt.auxio.music.Song
 import org.oxycblt.auxio.music.device.DeviceLibrary
@@ -82,7 +81,8 @@ interface UserLibrary {
          */
         suspend fun create(
             rawPlaylists: List<RawPlaylist>,
-            deviceLibrary: DeviceLibrary
+            deviceLibrary: DeviceLibrary,
+            nameFactory: Name.Known.Factory
         ): MutableUserLibrary
     }
 }
@@ -139,9 +139,7 @@ interface MutableUserLibrary : UserLibrary {
     suspend fun rewritePlaylist(playlist: Playlist, songs: List<Song>): Boolean
 }
 
-class UserLibraryFactoryImpl
-@Inject
-constructor(private val playlistDao: PlaylistDao, private val musicSettings: MusicSettings) :
+class UserLibraryFactoryImpl @Inject constructor(private val playlistDao: PlaylistDao) :
     UserLibrary.Factory {
     override suspend fun query() =
         try {
@@ -155,22 +153,22 @@ constructor(private val playlistDao: PlaylistDao, private val musicSettings: Mus
 
     override suspend fun create(
         rawPlaylists: List<RawPlaylist>,
-        deviceLibrary: DeviceLibrary
+        deviceLibrary: DeviceLibrary,
+        nameFactory: Name.Known.Factory
     ): MutableUserLibrary {
-        val nameFactory = Name.Known.Factory.from(musicSettings)
         val playlistMap = mutableMapOf<Music.UID, PlaylistImpl>()
         for (rawPlaylist in rawPlaylists) {
             val playlistImpl = PlaylistImpl.fromRaw(rawPlaylist, deviceLibrary, nameFactory)
             playlistMap[playlistImpl.uid] = playlistImpl
         }
-        return UserLibraryImpl(playlistDao, playlistMap, musicSettings)
+        return UserLibraryImpl(playlistDao, playlistMap, nameFactory)
     }
 }
 
 private class UserLibraryImpl(
     private val playlistDao: PlaylistDao,
     private val playlistMap: MutableMap<Music.UID, PlaylistImpl>,
-    private val musicSettings: MusicSettings
+    private val nameFactory: Name.Known.Factory
 ) : MutableUserLibrary {
     override fun hashCode() = playlistMap.hashCode()
 
@@ -186,7 +184,7 @@ private class UserLibraryImpl(
     override fun findPlaylist(name: String) = playlistMap.values.find { it.name.raw == name }
 
     override suspend fun createPlaylist(name: String, songs: List<Song>): Playlist? {
-        val playlistImpl = PlaylistImpl.from(name, songs, Name.Known.Factory.from(musicSettings))
+        val playlistImpl = PlaylistImpl.from(name, songs, nameFactory)
         synchronized(this) { playlistMap[playlistImpl.uid] = playlistImpl }
         val rawPlaylist =
             RawPlaylist(
@@ -209,9 +207,7 @@ private class UserLibraryImpl(
         val playlistImpl =
             synchronized(this) {
                 requireNotNull(playlistMap[playlist.uid]) { "Cannot rename invalid playlist" }
-                    .also {
-                        playlistMap[it.uid] = it.edit(name, Name.Known.Factory.from(musicSettings))
-                    }
+                    .also { playlistMap[it.uid] = it.edit(name, nameFactory) }
             }
 
         return try {

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

@@ -38,7 +38,9 @@ import org.oxycblt.auxio.music.MusicParent
 import org.oxycblt.auxio.music.Song
 import org.oxycblt.auxio.music.resolveNames
 import org.oxycblt.auxio.playback.state.RepeatMode
+import org.oxycblt.auxio.playback.ui.PlaybackPagerAdapter
 import org.oxycblt.auxio.playback.ui.StyledSeekBar
+import org.oxycblt.auxio.playback.ui.SwipeCoverView
 import org.oxycblt.auxio.ui.ViewBindingFragment
 import org.oxycblt.auxio.util.collectImmediately
 import org.oxycblt.auxio.util.logD
@@ -58,11 +60,13 @@ import org.oxycblt.auxio.util.systemBarInsetsCompat
 class PlaybackPanelFragment :
     ViewBindingFragment<FragmentPlaybackPanelBinding>(),
     Toolbar.OnMenuItemClickListener,
-    StyledSeekBar.Listener {
+    StyledSeekBar.Listener,
+    SwipeCoverView.OnSwipeListener {
     private val playbackModel: PlaybackViewModel by activityViewModels()
     private val detailModel: DetailViewModel by activityViewModels()
     private val listModel: ListViewModel by activityViewModels()
     private var equalizerLauncher: ActivityResultLauncher<Intent>? = null
+    private var coverAdapter: PlaybackPagerAdapter? = null
 
     override fun onCreateBinding(inflater: LayoutInflater) =
         FragmentPlaybackPanelBinding.inflate(inflater)
@@ -99,20 +103,10 @@ class PlaybackPanelFragment :
             }
         }
 
-        // Set up marquee on song information, alongside click handlers that navigate to each
-        // respective item.
-        binding.playbackSong.apply {
-            isSelected = true
-            setOnClickListener { playbackModel.song.value?.let(detailModel::showAlbum) }
-        }
-        binding.playbackArtist.apply {
-            isSelected = true
-            setOnClickListener { navigateToCurrentArtist() }
-        }
-        binding.playbackAlbum.apply {
-            isSelected = true
-            setOnClickListener { navigateToCurrentAlbum() }
-        }
+        binding.playbackCover.onSwipeListener = this
+        binding.playbackSong.setOnClickListener { navigateToCurrentSong() }
+        binding.playbackArtist.setOnClickListener { navigateToCurrentArtist() }
+        binding.playbackAlbum.setOnClickListener { navigateToCurrentAlbum() }
 
         binding.playbackSeekBar.listener = this
 
@@ -135,11 +129,8 @@ class PlaybackPanelFragment :
 
     override fun onDestroyBinding(binding: FragmentPlaybackPanelBinding) {
         equalizerLauncher = null
+        coverAdapter = null
         binding.playbackToolbar.setOnMenuItemClickListener(null)
-        // Marquee elements leak if they are not disabled when the views are destroyed.
-        binding.playbackSong.isSelected = false
-        binding.playbackArtist.isSelected = false
-        binding.playbackAlbum.isSelected = false
     }
 
     override fun onMenuItemClick(item: MenuItem): Boolean {
@@ -170,6 +161,14 @@ class PlaybackPanelFragment :
         playbackModel.seekTo(positionDs)
     }
 
+    override fun onSwipePrevious() {
+        playbackModel.prev()
+    }
+
+    override fun onSwipeNext() {
+        playbackModel.next()
+    }
+
     private fun updateSong(song: Song?) {
         if (song == null) {
             // Nothing to do.
@@ -212,6 +211,10 @@ class PlaybackPanelFragment :
         requireBinding().playbackShuffle.isActivated = isShuffled
     }
 
+    private fun navigateToCurrentSong() {
+        playbackModel.song.value?.let(detailModel::showAlbum)
+    }
+
     private fun navigateToCurrentArtist() {
         playbackModel.song.value?.let(detailModel::showArtist)
     }

app/src/main/java/org/oxycblt/auxio/playback/queue/QueueFragment.kt

@@ -22,6 +22,7 @@ import android.os.Bundle
 import android.view.LayoutInflater
 import androidx.core.view.isInvisible
 import androidx.fragment.app.activityViewModels
+import androidx.fragment.app.viewModels
 import androidx.recyclerview.widget.ItemTouchHelper
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
@@ -42,7 +43,7 @@ import org.oxycblt.auxio.util.logD
  */
 @AndroidEntryPoint
 class QueueFragment : ViewBindingFragment<FragmentQueueBinding>(), EditClickListListener<Song> {
-    private val queueModel: QueueViewModel by activityViewModels()
+    private val queueModel: QueueViewModel by viewModels()
     private val playbackModel: PlaybackViewModel by activityViewModels()
     private val queueAdapter = QueueAdapter(this)
     private var touchHelper: ItemTouchHelper? = null

app/src/main/java/org/oxycblt/auxio/playback/system/PlaybackService.kt

@@ -121,14 +121,14 @@ class PlaybackService :
         // battery/apk size/cache size
         val audioRenderer = RenderersFactory { handler, _, audioListener, _, _ ->
             arrayOf(
+                FfmpegAudioRenderer(handler, audioListener, replayGainProcessor),
                 MediaCodecAudioRenderer(
                     this,
                     MediaCodecSelector.DEFAULT,
                     handler,
                     audioListener,
                     AudioCapabilities.DEFAULT_AUDIO_CAPABILITIES,
-                    replayGainProcessor),
-                FfmpegAudioRenderer(handler, audioListener, replayGainProcessor))
+                    replayGainProcessor))
         }
 
         player =

app/src/main/java/org/oxycblt/auxio/playback/ui/PlaybackPagerAdapter.kt

@@ -0,0 +1,121 @@
+/*
+ * Copyright (c) 2023 Auxio Project
+ * PlaybackPagerAdapter.kt is part of Auxio.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
+package org.oxycblt.auxio.playback.ui
+
+import android.view.ViewGroup
+import androidx.lifecycle.DefaultLifecycleObserver
+import androidx.recyclerview.widget.DiffUtil
+import androidx.recyclerview.widget.RecyclerView
+import kotlin.jvm.internal.Intrinsics
+import org.oxycblt.auxio.databinding.ItemPlaybackSongBinding
+import org.oxycblt.auxio.list.adapter.FlexibleListAdapter
+import org.oxycblt.auxio.music.Song
+import org.oxycblt.auxio.music.resolveNames
+import org.oxycblt.auxio.util.inflater
+
+/** @author Koitharu, Alexander Capehart (OxygenCobalt) */
+class PlaybackPagerAdapter(private val listener: Listener) :
+    FlexibleListAdapter<Song, CoverViewHolder>(CoverViewHolder.DIFF_CALLBACK) {
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): CoverViewHolder {
+        return CoverViewHolder.from(parent)
+    }
+
+    override fun onBindViewHolder(holder: CoverViewHolder, position: Int) {
+        holder.bind(getItem(position), listener)
+    }
+
+    override fun onViewRecycled(holder: CoverViewHolder) {
+        holder.recycle()
+        super.onViewRecycled(holder)
+    }
+
+    interface Listener {
+        fun navigateToCurrentArtist()
+
+        fun navigateToCurrentAlbum()
+
+        fun navigateToCurrentSong()
+
+        fun navigateToMenu()
+    }
+}
+
+class CoverViewHolder private constructor(private val binding: ItemPlaybackSongBinding) :
+    RecyclerView.ViewHolder(binding.root), DefaultLifecycleObserver {
+    init {
+        binding.root.layoutParams =
+            RecyclerView.LayoutParams(
+                RecyclerView.LayoutParams.MATCH_PARENT, RecyclerView.LayoutParams.MATCH_PARENT)
+    }
+
+    /**
+     * Bind new data to this instance.
+     *
+     * @param item The new [Song] to bind.
+     */
+    fun bind(item: Song, listener: PlaybackPagerAdapter.Listener) {
+        val context = binding.root.context
+        binding.playbackCover.bind(item)
+        // binding.playbackCover.bind(item)
+        binding.playbackSong.apply { text = item.name.resolve(context) }
+        binding.playbackArtist.apply {
+            text = item.artists.resolveNames(context)
+            setOnClickListener { listener.navigateToCurrentArtist() }
+        }
+        binding.playbackAlbum.apply {
+            text = item.album.name.resolve(context)
+            setOnClickListener { listener.navigateToCurrentAlbum() }
+        }
+        setSelected(true)
+    }
+
+    fun recycle() {
+        // Marquee elements leak if they are not disabled when the views are destroyed.
+        // TODO: Move to TextView impl to avoid having to deal with lifecycle here
+        setSelected(false)
+    }
+
+    private fun setSelected(value: Boolean) {
+        binding.playbackSong.isSelected = value
+        binding.playbackArtist.isSelected = value
+        binding.playbackAlbum.isSelected = value
+    }
+
+    companion object {
+        /**
+         * Create a new instance.
+         *
+         * @param parent The parent to inflate this instance from.
+         * @return A new instance.
+         */
+        fun from(parent: ViewGroup) =
+            CoverViewHolder(ItemPlaybackSongBinding.inflate(parent.context.inflater))
+
+        /** A comparator that can be used with DiffUtil. */
+        val DIFF_CALLBACK =
+            object : DiffUtil.ItemCallback<Song>() {
+                override fun areItemsTheSame(oldItem: Song, newItem: Song) =
+                    oldItem.uid == newItem.uid
+
+                override fun areContentsTheSame(oldItem: Song, newItem: Song): Boolean {
+                    return Intrinsics.areEqual(oldItem, newItem)
+                }
+            }
+    }
+}

app/src/main/java/org/oxycblt/auxio/playback/ui/SwipeCoverView.kt

@@ -0,0 +1,107 @@
+/*
+ * Copyright (c) 2023 Auxio Project
+ * SwipeCoverView.kt is part of Auxio.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+ 
+package org.oxycblt.auxio.playback.ui
+
+import android.annotation.SuppressLint
+import android.content.Context
+import android.util.AttributeSet
+import android.view.GestureDetector
+import android.view.GestureDetector.OnGestureListener
+import android.view.MotionEvent
+import android.view.ViewConfiguration
+import androidx.annotation.AttrRes
+import kotlin.math.abs
+import org.oxycblt.auxio.image.CoverView
+import org.oxycblt.auxio.util.isRtl
+
+class SwipeCoverView
+@JvmOverloads
+constructor(context: Context, attrs: AttributeSet? = null, @AttrRes defStyleAttr: Int = 0) :
+    CoverView(context, attrs, defStyleAttr), OnGestureListener {
+
+    private val gestureDetector = GestureDetector(context, this)
+    private val viewConfig = ViewConfiguration.get(context)
+
+    var onSwipeListener: OnSwipeListener? = null
+
+    override fun onInterceptTouchEvent(event: MotionEvent): Boolean {
+        return gestureDetector.onTouchEvent(event)
+    }
+
+    @SuppressLint("ClickableViewAccessibility")
+    override fun onTouchEvent(event: MotionEvent): Boolean {
+        return gestureDetector.onTouchEvent(event) || super.onTouchEvent(event)
+    }
+
+    override fun onGenericMotionEvent(event: MotionEvent): Boolean {
+        return gestureDetector.onGenericMotionEvent(event) || super.onGenericMotionEvent(event)
+    }
+
+    override fun onDown(e: MotionEvent): Boolean = true
+
+    override fun onShowPress(e: MotionEvent) = Unit
+
+    override fun onSingleTapUp(e: MotionEvent): Boolean = false
+
+    override fun onScroll(
+        e1: MotionEvent?,
+        e2: MotionEvent,
+        velocityX: Float,
+        velocityY: Float
+    ): Boolean = false
+
+    override fun onFling(
+        e1: MotionEvent?,
+        e2: MotionEvent,
+        velocityX: Float,
+        velocityY: Float
+    ): Boolean {
+        e1 ?: return false
+        val diffY = e2.y - e1.y
+        val diffX = e2.x - e1.x
+        if (abs(diffX) > abs(diffY) &&
+            abs(diffX) > viewConfig.scaledTouchSlop &&
+            abs(velocityX) > viewConfig.scaledMinimumFlingVelocity) {
+            if (diffX > 0) {
+                onSwipeRight()
+            } else {
+                onSwipeLeft()
+            }
+            return true
+        }
+        return false
+    }
+
+    override fun onLongPress(e: MotionEvent) = Unit
+
+    private fun onSwipeRight() {
+        onSwipeListener?.run { if (isRtl) onSwipeNext() else onSwipePrevious() }
+    }
+
+    private fun onSwipeLeft() {
+        onSwipeListener?.run { if (isRtl) onSwipePrevious() else onSwipeNext() }
+    }
+
+    interface OnSwipeListener {
+
+        fun onSwipePrevious()
+
+        fun onSwipeNext()
+    }
+}

app/src/main/java/org/oxycblt/auxio/search/SearchEngine.kt

@@ -71,7 +71,7 @@ class SearchEngineImpl @Inject constructor(@ApplicationContext private val conte
         return SearchEngine.Items(
             songs =
                 items.songs?.searchListImpl(query) { q, song ->
-                    song.path.name.contains(q, ignoreCase = true)
+                    song.path.name?.contains(q, ignoreCase = true) == true
                 },
             albums = items.albums?.searchListImpl(query),
             artists = items.artists?.searchListImpl(query),

app/src/main/java/org/oxycblt/auxio/search/SearchFragment.kt

@@ -23,6 +23,8 @@ import android.view.LayoutInflater
 import android.view.MenuItem
 import android.view.View
 import android.view.inputmethod.InputMethodManager
+import androidx.activity.result.ActivityResultLauncher
+import androidx.activity.result.contract.ActivityResultContracts
 import androidx.core.view.isInvisible
 import androidx.core.view.postDelayed
 import androidx.core.widget.addTextChangedListener
@@ -50,7 +52,9 @@ import org.oxycblt.auxio.music.MusicParent
 import org.oxycblt.auxio.music.MusicViewModel
 import org.oxycblt.auxio.music.Playlist
 import org.oxycblt.auxio.music.PlaylistDecision
+import org.oxycblt.auxio.music.PlaylistMessage
 import org.oxycblt.auxio.music.Song
+import org.oxycblt.auxio.music.external.M3U
 import org.oxycblt.auxio.playback.PlaybackDecision
 import org.oxycblt.auxio.playback.PlaybackViewModel
 import org.oxycblt.auxio.util.collect
@@ -58,8 +62,10 @@ import org.oxycblt.auxio.util.collectImmediately
 import org.oxycblt.auxio.util.context
 import org.oxycblt.auxio.util.getSystemServiceCompat
 import org.oxycblt.auxio.util.logD
+import org.oxycblt.auxio.util.logW
 import org.oxycblt.auxio.util.navigateSafe
 import org.oxycblt.auxio.util.setFullWidthLookup
+import org.oxycblt.auxio.util.showToast
 
 /**
  * The [ListFragment] providing search functionality for the music library.
@@ -77,6 +83,8 @@ class SearchFragment : ListFragment<Music, FragmentSearchBinding>() {
     override val playbackModel: PlaybackViewModel by activityViewModels()
     override val musicModel: MusicViewModel by activityViewModels()
     private val searchAdapter = SearchAdapter(this)
+    private var getContentLauncher: ActivityResultLauncher<String>? = null
+    private var pendingImportTarget: Playlist? = null
     private var imm: InputMethodManager? = null
     private var launchedKeyboard = false
 
@@ -98,6 +106,19 @@ class SearchFragment : ListFragment<Music, FragmentSearchBinding>() {
 
         imm = binding.context.getSystemServiceCompat(InputMethodManager::class)
 
+        getContentLauncher =
+            registerForActivityResult(ActivityResultContracts.GetContent()) { uri ->
+                if (uri == null) {
+                    logW("No URI returned from file picker")
+                    return@registerForActivityResult
+                }
+
+                logD("Received playlist URI $uri")
+                musicModel.importPlaylist(uri, pendingImportTarget)
+            }
+
+        // --- UI SETUP ---
+
         binding.searchNormalToolbar.apply {
             // Initialize the current filtering mode.
             menu.findItem(searchModel.getFilterOptionId()).isChecked = true
@@ -141,7 +162,8 @@ class SearchFragment : ListFragment<Music, FragmentSearchBinding>() {
         collectImmediately(searchModel.searchResults, ::updateSearchResults)
         collectImmediately(listModel.selected, ::updateSelection)
         collect(listModel.menu.flow, ::handleMenu)
-        collect(musicModel.playlistDecision.flow, ::handleDecision)
+        collect(musicModel.playlistDecision.flow, ::handlePlaylistDecision)
+        collect(musicModel.playlistMessage.flow, ::handlePlaylistMessage)
         collectImmediately(
             playbackModel.song, playbackModel.parent, playbackModel.isPlaying, ::updatePlayback)
         collect(playbackModel.playbackDecision.flow, ::handlePlaybackDecision)
@@ -283,18 +305,36 @@ class SearchFragment : ListFragment<Music, FragmentSearchBinding>() {
         }
     }
 
-    private fun handleDecision(decision: PlaylistDecision?) {
+    private fun handlePlaylistDecision(decision: PlaylistDecision?) {
         if (decision == null) return
         val directions =
             when (decision) {
+                is PlaylistDecision.Import -> {
+                    logD("Importing playlist")
+                    pendingImportTarget = decision.target
+                    requireNotNull(getContentLauncher) {
+                            "Content picker launcher was not available"
+                        }
+                        .launch(M3U.MIME_TYPE)
+                    musicModel.playlistDecision.consume()
+                    return
+                }
                 is PlaylistDecision.Rename -> {
                     logD("Renaming ${decision.playlist}")
-                    SearchFragmentDirections.renamePlaylist(decision.playlist.uid)
+                    SearchFragmentDirections.renamePlaylist(
+                        decision.playlist.uid,
+                        decision.template,
+                        decision.applySongs.map { it.uid }.toTypedArray(),
+                        decision.reason)
                 }
                 is PlaylistDecision.Delete -> {
                     logD("Deleting ${decision.playlist}")
                     SearchFragmentDirections.deletePlaylist(decision.playlist.uid)
                 }
+                is PlaylistDecision.Export -> {
+                    logD("Exporting ${decision.playlist}")
+                    SearchFragmentDirections.exportPlaylist(decision.playlist.uid)
+                }
                 is PlaylistDecision.Add -> {
                     logD("Adding ${decision.songs.size} to a playlist")
                     SearchFragmentDirections.addToPlaylist(
@@ -307,6 +347,12 @@ class SearchFragment : ListFragment<Music, FragmentSearchBinding>() {
         findNavController().navigateSafe(directions)
     }
 
+    private fun handlePlaylistMessage(message: PlaylistMessage?) {
+        if (message == null) return
+        requireContext().showToast(message.stringRes)
+        musicModel.playlistMessage.consume()
+    }
+
     private fun updatePlayback(song: Song?, parent: MusicParent?, isPlaying: Boolean) {
         searchAdapter.setPlaying(parent ?: song, isPlaying)
     }

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

@@ -68,12 +68,6 @@ class BottomSheetContentBehavior<V : View>(context: Context, attributeSet: Attri
         if (consumed != lastConsumed) {
             logD("Consumed amount changed, re-applying insets")
             lastConsumed = consumed
-
-            val insets = lastInsets
-            if (insets != null) {
-                child.dispatchApplyWindowInsets(insets)
-            }
-
             lastInsets?.let(child::dispatchApplyWindowInsets)
             measureContent(parent, child, consumed)
             layoutContent(child)

app/src/main/java/org/oxycblt/auxio/util/StateUtil.kt

@@ -22,11 +22,16 @@ import androidx.fragment.app.Fragment
 import androidx.lifecycle.Lifecycle
 import androidx.lifecycle.lifecycleScope
 import androidx.lifecycle.repeatOnLifecycle
+import java.util.concurrent.TimeoutException
 import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.TimeoutCancellationException
+import kotlinx.coroutines.channels.ReceiveChannel
+import kotlinx.coroutines.channels.SendChannel
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.combine
 import kotlinx.coroutines.launch
+import kotlinx.coroutines.withTimeout
 
 /**
  * A wrapper around [StateFlow] exposing a one-time consumable event.
@@ -146,3 +151,57 @@ private fun Fragment.launch(
 ) {
     viewLifecycleOwner.lifecycleScope.launch { viewLifecycleOwner.repeatOnLifecycle(state, block) }
 }
+
+/**
+ * Wraps [SendChannel.send] with a specified timeout.
+ *
+ * @param element The element to send.
+ * @param timeout The timeout in milliseconds. Defaults to 10 seconds.
+ * @throws TimeoutException If the timeout is reached, provides context on what element
+ *   specifically.
+ */
+suspend fun <E> SendChannel<E>.sendWithTimeout(element: E, timeout: Long = 10000) {
+    try {
+        withTimeout(timeout) { send(element) }
+    } catch (e: TimeoutCancellationException) {
+        throw TimeoutException("Timed out sending element $element to channel: $e")
+    }
+}
+
+/**
+ * Wraps a [ReceiveChannel] consumption with a specified timeout. Note that the timeout will only
+ * start on the first element received, as to prevent initialization of dependent coroutines being
+ * interpreted as a timeout.
+ *
+ * @param action The action to perform on each element received.
+ * @param timeout The timeout in milliseconds. Defaults to 10 seconds.
+ * @throws TimeoutException If the timeout is reached, provides context on what element
+ *   specifically.
+ */
+suspend fun <E> ReceiveChannel<E>.forEachWithTimeout(
+    timeout: Long = 10000,
+    action: suspend (E) -> Unit
+) {
+    var exhausted = false
+    var subsequent = false
+    val handler: suspend () -> Unit = {
+        val value = receiveCatching()
+        if (value.isClosed && value.exceptionOrNull() == null) {
+            exhausted = true
+        } else {
+            action(value.getOrThrow())
+        }
+    }
+    while (!exhausted) {
+        try {
+            if (subsequent) {
+                withTimeout(timeout) { handler() }
+            } else {
+                handler()
+                subsequent = true
+            }
+        } catch (e: TimeoutCancellationException) {
+            throw TimeoutException("Timed out receiving element from channel: $e")
+        }
+    }
+}

app/src/main/res/drawable/ic_add_24.xml

@@ -2,10 +2,10 @@
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
     android:width="24dp"
     android:height="24dp"
+    android:tint="?attr/colorControlNormal"
     android:viewportWidth="24"
-    android:viewportHeight="24"
-    android:tint="?attr/colorControlNormal">
-  <path
-      android:fillColor="@android:color/white"
-      android:pathData="M11,19V13H5V11H11V5H13V11H19V13H13V19Z"/>
+    android:viewportHeight="24">
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M11,19V13H5V11H11V5H13V11H19V13H13V19Z" />
 </vector>

app/src/main/res/drawable/ic_copy_24.xml

@@ -2,10 +2,10 @@
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
     android:width="24dp"
     android:height="24dp"
+    android:tint="?attr/colorControlNormal"
     android:viewportWidth="960"
-    android:viewportHeight="960"
-    android:tint="?attr/colorControlNormal">
-  <path
-      android:fillColor="@android:color/white"
-      android:pathData="M200,880Q167,880 143.5,856.5Q120,833 120,800L120,240L200,240L200,800Q200,800 200,800Q200,800 200,800L640,800L640,880L200,880ZM360,720Q327,720 303.5,696.5Q280,673 280,640L280,160Q280,127 303.5,103.5Q327,80 360,80L720,80Q753,80 776.5,103.5Q800,127 800,160L800,640Q800,673 776.5,696.5Q753,720 720,720L360,720ZM360,640L720,640Q720,640 720,640Q720,640 720,640L720,160Q720,160 720,160Q720,160 720,160L360,160Q360,160 360,160Q360,160 360,160L360,640Q360,640 360,640Q360,640 360,640ZM360,640Q360,640 360,640Q360,640 360,640L360,160Q360,160 360,160Q360,160 360,160L360,160Q360,160 360,160Q360,160 360,160L360,640Q360,640 360,640Q360,640 360,640L360,640Z"/>
+    android:viewportHeight="960">
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M200,880Q167,880 143.5,856.5Q120,833 120,800L120,240L200,240L200,800Q200,800 200,800Q200,800 200,800L640,800L640,880L200,880ZM360,720Q327,720 303.5,696.5Q280,673 280,640L280,160Q280,127 303.5,103.5Q327,80 360,80L720,80Q753,80 776.5,103.5Q800,127 800,160L800,640Q800,673 776.5,696.5Q753,720 720,720L360,720ZM360,640L720,640Q720,640 720,640Q720,640 720,640L720,160Q720,160 720,160Q720,160 720,160L360,160Q360,160 360,160Q360,160 360,160L360,640Q360,640 360,640Q360,640 360,640ZM360,640Q360,640 360,640Q360,640 360,640L360,160Q360,160 360,160Q360,160 360,160L360,160Q360,160 360,160Q360,160 360,160L360,640Q360,640 360,640Q360,640 360,640L360,640Z" />
 </vector>

app/src/main/res/drawable/ic_details_24.xml

@@ -2,10 +2,10 @@
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
     android:width="24dp"
     android:height="24dp"
+    android:tint="?attr/colorControlNormal"
     android:viewportWidth="960"
-    android:viewportHeight="960"
-    android:tint="?attr/colorControlNormal">
-  <path
-      android:fillColor="@android:color/white"
-      android:pathData="M360,720L800,720Q800,720 800,720Q800,720 800,720L800,613L360,613L360,720ZM160,347L280,347L280,240L160,240Q160,240 160,240Q160,240 160,240L160,347ZM160,534L280,534L280,427L160,427L160,534ZM160,720L280,720L280,613L160,613L160,720Q160,720 160,720Q160,720 160,720ZM360,534L800,534L800,427L360,427L360,534ZM360,347L800,347L800,240Q800,240 800,240Q800,240 800,240L360,240L360,347ZM160,800Q127,800 103.5,776.5Q80,753 80,720L80,240Q80,207 103.5,183.5Q127,160 160,160L800,160Q833,160 856.5,183.5Q880,207 880,240L880,720Q880,753 856.5,776.5Q833,800 800,800L160,800Z"/>
+    android:viewportHeight="960">
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M360,720L800,720Q800,720 800,720Q800,720 800,720L800,613L360,613L360,720ZM160,347L280,347L280,240L160,240Q160,240 160,240Q160,240 160,240L160,347ZM160,534L280,534L280,427L160,427L160,534ZM160,720L280,720L280,613L160,613L160,720Q160,720 160,720Q160,720 160,720ZM360,534L800,534L800,427L360,427L360,534ZM360,347L800,347L800,240Q800,240 800,240Q800,240 800,240L360,240L360,347ZM160,800Q127,800 103.5,776.5Q80,753 80,720L80,240Q80,207 103.5,183.5Q127,160 160,160L800,160Q833,160 856.5,183.5Q880,207 880,240L880,720Q880,753 856.5,776.5Q833,800 800,800L160,800Z" />
 </vector>

app/src/main/res/drawable/ic_edit_24.xml

@@ -2,10 +2,10 @@
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
     android:width="24dp"
     android:height="24dp"
+    android:tint="?attr/colorControlNormal"
     android:viewportWidth="960"
-    android:viewportHeight="960"
-    android:tint="?attr/colorControlNormal">
-  <path
-      android:fillColor="@android:color/white"
-      android:pathData="M200,760L256,760L601,415L545,359L200,704L200,760ZM772,357L602,189L715,76L884,245L772,357ZM120,840L120,670L544,246L714,416L290,840L120,840ZM573,387L545,359L545,359L601,415L601,415L573,387Z"/>
+    android:viewportHeight="960">
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M200,760L256,760L601,415L545,359L200,704L200,760ZM772,357L602,189L715,76L884,245L772,357ZM120,840L120,670L544,246L714,416L290,840L120,840ZM573,387L545,359L545,359L601,415L601,415L573,387Z" />
 </vector>

app/src/main/res/drawable/ic_import_24.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:tint="?attr/colorControlNormal"
+    android:viewportWidth="960"
+    android:viewportHeight="960">
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M440,760L520,760L520,593L584,657L640,600L480,440L320,600L377,656L440,593L440,760ZM240,880Q207,880 183.5,856.5Q160,833 160,800L160,160Q160,127 183.5,103.5Q207,80 240,80L560,80L800,320L800,800Q800,833 776.5,856.5Q753,880 720,880L240,880ZM520,360L520,160L240,160Q240,160 240,160Q240,160 240,160L240,800Q240,800 240,800Q240,800 240,800L720,800Q720,800 720,800Q720,800 720,800L720,360L520,360ZM240,160L240,160L240,360L240,360L240,160L240,360L240,360L240,800Q240,800 240,800Q240,800 240,800L240,800Q240,800 240,800Q240,800 240,800L240,160Q240,160 240,160Q240,160 240,160Z" />
+</vector>

app/src/main/res/drawable/ic_play_next_24.xml

@@ -2,10 +2,10 @@
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
     android:width="24dp"
     android:height="24dp"
+    android:tint="?attr/colorControlNormal"
     android:viewportWidth="960"
-    android:viewportHeight="960"
-    android:tint="?attr/colorControlNormal">
-  <path
-      android:fillColor="@android:color/white"
-      android:pathData="M780,900L720,840L840,720L720,600L780,540L960,720L780,900ZM320,840L320,760L160,760Q127,760 103.5,736.5Q80,713 80,680L80,200Q80,167 103.5,143.5Q127,120 160,120L800,120Q833,120 856.5,143.5Q880,167 880,200L880,480L800,480L800,200Q800,200 800,200Q800,200 800,200L160,200Q160,200 160,200Q160,200 160,200L160,680Q160,680 160,680Q160,680 160,680L680,680L680,760L600,760L600,840L320,840ZM440,600L520,600L520,480L640,480L640,400L520,400L520,280L440,280L440,400L320,400L320,480L440,480L440,600ZM160,680L160,680Q160,680 160,680Q160,680 160,680L160,200Q160,200 160,200Q160,200 160,200L160,200Q160,200 160,200Q160,200 160,200L160,680L160,680L160,680Z"/>
+    android:viewportHeight="960">
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M780,900L720,840L840,720L720,600L780,540L960,720L780,900ZM320,840L320,760L160,760Q127,760 103.5,736.5Q80,713 80,680L80,200Q80,167 103.5,143.5Q127,120 160,120L800,120Q833,120 856.5,143.5Q880,167 880,200L880,480L800,480L800,200Q800,200 800,200Q800,200 800,200L160,200Q160,200 160,200Q160,200 160,200L160,680Q160,680 160,680Q160,680 160,680L680,680L680,760L600,760L600,840L320,840ZM440,600L520,600L520,480L640,480L640,400L520,400L520,280L440,280L440,400L320,400L320,480L440,480L440,600ZM160,680L160,680Q160,680 160,680Q160,680 160,680L160,200Q160,200 160,200Q160,200 160,200L160,200Q160,200 160,200Q160,200 160,200L160,680L160,680L160,680Z" />
 </vector>

app/src/main/res/drawable/ic_playlist_24.xml

@@ -2,10 +2,10 @@
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
     android:width="24dp"
     android:height="24dp"
+    android:tint="?attr/colorControlNormal"
     android:viewportWidth="24"
-    android:viewportHeight="24"
-    android:tint="?attr/colorControlNormal">
-  <path
-      android:fillColor="@android:color/white"
-      android:pathData="M2.5,16V14H10.5V16ZM2.5,12V10H14.5V12ZM2.5,8V6H14.5V8ZM15.5,21V13L21.5,17Z"/>
+    android:viewportHeight="24">
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M2.5,16V14H10.5V16ZM2.5,12V10H14.5V12ZM2.5,8V6H14.5V8ZM15.5,21V13L21.5,17Z" />
 </vector>

app/src/main/res/drawable/ic_playlist_add_24.xml

@@ -2,11 +2,11 @@
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
     android:width="24dp"
     android:height="24dp"
+    android:tint="?attr/colorControlNormal"
     android:viewportWidth="960"
-    android:viewportHeight="960"
-    android:tint="?attr/colorControlNormal">
-  <path
-      android:fillColor="@android:color/white"
-      android:pathData="M120,640L120,560L400,560L400,640L120,640ZM120,480L120,400L560,400L560,480L120,480ZM120,320L120,240L560,240L560,320L120,320ZM640,800L640,640L480,640L480,560L640,560L640,400L720,400L720,560L880,560L880,640L720,640L720,800L640,800Z"/>
+    android:viewportHeight="960">
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M120,640L120,560L400,560L400,640L120,640ZM120,480L120,400L560,400L560,480L120,480ZM120,320L120,240L560,240L560,320L120,320ZM640,800L640,640L480,640L480,560L640,560L640,400L720,400L720,560L880,560L880,640L720,640L720,800L640,800Z" />
 </vector>
 

app/src/main/res/drawable/ic_queue_add_24.xml

@@ -2,10 +2,10 @@
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
     android:width="24dp"
     android:height="24dp"
+    android:tint="?attr/colorControlNormal"
     android:viewportWidth="960"
-    android:viewportHeight="960"
-    android:tint="?attr/colorControlNormal">
-  <path
-      android:fillColor="@android:color/white"
-      android:pathData="M440,600L520,600L520,480L640,480L640,400L520,400L520,280L440,280L440,400L320,400L320,480L440,480L440,600ZM320,840L320,760L160,760Q127,760 103.5,736.5Q80,713 80,680L80,200Q80,167 103.5,143.5Q127,120 160,120L800,120Q833,120 856.5,143.5Q880,167 880,200L880,680Q880,713 856.5,736.5Q833,760 800,760L640,760L640,840L320,840ZM160,680L800,680Q800,680 800,680Q800,680 800,680L800,200Q800,200 800,200Q800,200 800,200L160,200Q160,200 160,200Q160,200 160,200L160,680Q160,680 160,680Q160,680 160,680ZM160,680Q160,680 160,680Q160,680 160,680L160,200Q160,200 160,200Q160,200 160,200L160,200Q160,200 160,200Q160,200 160,200L160,680Q160,680 160,680Q160,680 160,680L160,680Z"/>
+    android:viewportHeight="960">
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M440,600L520,600L520,480L640,480L640,400L520,400L520,280L440,280L440,400L320,400L320,480L440,480L440,600ZM320,840L320,760L160,760Q127,760 103.5,736.5Q80,713 80,680L80,200Q80,167 103.5,143.5Q127,120 160,120L800,120Q833,120 856.5,143.5Q880,167 880,200L880,680Q880,713 856.5,736.5Q833,760 800,760L640,760L640,840L320,840ZM160,680L800,680Q800,680 800,680Q800,680 800,680L800,200Q800,200 800,200Q800,200 800,200L160,200Q160,200 160,200Q160,200 160,200L160,680Q160,680 160,680Q160,680 160,680ZM160,680Q160,680 160,680Q160,680 160,680L160,200Q160,200 160,200Q160,200 160,200L160,200Q160,200 160,200Q160,200 160,200L160,680Q160,680 160,680Q160,680 160,680L160,680Z" />
 </vector>

app/src/main/res/drawable/ic_save_24.xml

@@ -2,11 +2,11 @@
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
     android:width="24dp"
     android:height="24dp"
+    android:tint="@color/sel_activatable_icon"
     android:viewportWidth="960"
-    android:viewportHeight="960"
-    android:tint="@color/sel_activatable_icon">
-  <path
-      android:fillColor="@android:color/white"
-      android:pathData="M840,280L840,840L120,840L120,120L680,120L840,280ZM760,314L646,200L200,200L200,760L760,760L760,314ZM480,720Q530,720 565,685Q600,650 600,600Q600,550 565,515Q530,480 480,480Q430,480 395,515Q360,550 360,600Q360,650 395,685Q430,720 480,720ZM240,400L600,400L600,240L240,240L240,400ZM200,314L200,760L200,760L200,200L200,200L200,314Z"/>
+    android:viewportHeight="960">
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M840,280L840,840L120,840L120,120L680,120L840,280ZM760,314L646,200L200,200L200,760L760,760L760,314ZM480,720Q530,720 565,685Q600,650 600,600Q600,550 565,515Q530,480 480,480Q430,480 395,515Q360,550 360,600Q360,650 395,685Q430,720 480,720ZM240,400L600,400L600,240L240,240L240,400ZM200,314L200,760L200,760L200,200L200,200L200,314Z" />
 </vector>
 

app/src/main/res/drawable/ic_share_24.xml

@@ -2,10 +2,10 @@
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
     android:width="24dp"
     android:height="24dp"
+    android:tint="?attr/colorControlNormal"
     android:viewportWidth="960"
-    android:viewportHeight="960"
-    android:tint="?attr/colorControlNormal">
-  <path
-      android:fillColor="@android:color/white"
-      android:pathData="M720,880Q670,880 635,845Q600,810 600,760Q600,753 601,745.5Q602,738 604,732L322,568Q305,583 284,591.5Q263,600 240,600Q190,600 155,565Q120,530 120,480Q120,430 155,395Q190,360 240,360Q263,360 284,368.5Q305,377 322,392L604,228Q602,222 601,214.5Q600,207 600,200Q600,150 635,115Q670,80 720,80Q770,80 805,115Q840,150 840,200Q840,250 805,285Q770,320 720,320Q697,320 676,311.5Q655,303 638,288L356,452Q358,458 359,465.5Q360,473 360,480Q360,487 359,494.5Q358,502 356,508L638,672Q655,657 676,648.5Q697,640 720,640Q770,640 805,675Q840,710 840,760Q840,810 805,845Q770,880 720,880ZM720,240Q737,240 748.5,228.5Q760,217 760,200Q760,183 748.5,171.5Q737,160 720,160Q703,160 691.5,171.5Q680,183 680,200Q680,217 691.5,228.5Q703,240 720,240ZM240,520Q257,520 268.5,508.5Q280,497 280,480Q280,463 268.5,451.5Q257,440 240,440Q223,440 211.5,451.5Q200,463 200,480Q200,497 211.5,508.5Q223,520 240,520ZM720,800Q737,800 748.5,788.5Q760,777 760,760Q760,743 748.5,731.5Q737,720 720,720Q703,720 691.5,731.5Q680,743 680,760Q680,777 691.5,788.5Q703,800 720,800ZM720,200Q720,200 720,200Q720,200 720,200Q720,200 720,200Q720,200 720,200Q720,200 720,200Q720,200 720,200Q720,200 720,200Q720,200 720,200ZM240,480Q240,480 240,480Q240,480 240,480Q240,480 240,480Q240,480 240,480Q240,480 240,480Q240,480 240,480Q240,480 240,480Q240,480 240,480ZM720,760Q720,760 720,760Q720,760 720,760Q720,760 720,760Q720,760 720,760Q720,760 720,760Q720,760 720,760Q720,760 720,760Q720,760 720,760Z"/>
+    android:viewportHeight="960">
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M720,880Q670,880 635,845Q600,810 600,760Q600,753 601,745.5Q602,738 604,732L322,568Q305,583 284,591.5Q263,600 240,600Q190,600 155,565Q120,530 120,480Q120,430 155,395Q190,360 240,360Q263,360 284,368.5Q305,377 322,392L604,228Q602,222 601,214.5Q600,207 600,200Q600,150 635,115Q670,80 720,80Q770,80 805,115Q840,150 840,200Q840,250 805,285Q770,320 720,320Q697,320 676,311.5Q655,303 638,288L356,452Q358,458 359,465.5Q360,473 360,480Q360,487 359,494.5Q358,502 356,508L638,672Q655,657 676,648.5Q697,640 720,640Q770,640 805,675Q840,710 840,760Q840,810 805,845Q770,880 720,880ZM720,240Q737,240 748.5,228.5Q760,217 760,200Q760,183 748.5,171.5Q737,160 720,160Q703,160 691.5,171.5Q680,183 680,200Q680,217 691.5,228.5Q703,240 720,240ZM240,520Q257,520 268.5,508.5Q280,497 280,480Q280,463 268.5,451.5Q257,440 240,440Q223,440 211.5,451.5Q200,463 200,480Q200,497 211.5,508.5Q223,520 240,520ZM720,800Q737,800 748.5,788.5Q760,777 760,760Q760,743 748.5,731.5Q737,720 720,720Q703,720 691.5,731.5Q680,743 680,760Q680,777 691.5,788.5Q703,800 720,800ZM720,200Q720,200 720,200Q720,200 720,200Q720,200 720,200Q720,200 720,200Q720,200 720,200Q720,200 720,200Q720,200 720,200Q720,200 720,200ZM240,480Q240,480 240,480Q240,480 240,480Q240,480 240,480Q240,480 240,480Q240,480 240,480Q240,480 240,480Q240,480 240,480Q240,480 240,480ZM720,760Q720,760 720,760Q720,760 720,760Q720,760 720,760Q720,760 720,760Q720,760 720,760Q720,760 720,760Q720,760 720,760Q720,760 720,760Z" />
 </vector>

app/src/main/res/drawable/ic_shuffle_off_24.xml

@@ -2,10 +2,10 @@
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
     android:width="24dp"
     android:height="24dp"
+    android:tint="?attr/colorControlNormal"
     android:viewportWidth="960"
-    android:viewportHeight="960"
-    android:tint="?attr/colorControlNormal">
-  <path
-      android:fillColor="@android:color/white"
-      android:pathData="M560,800L560,720L664,720L537,593L594,536L720,662L720,560L800,560L800,800L560,800ZM216,800L160,744L664,240L560,240L560,160L800,160L800,400L720,400L720,296L216,800ZM367,423L160,216L216,160L423,367L367,423Z"/>
+    android:viewportHeight="960">
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M560,800L560,720L664,720L537,593L594,536L720,662L720,560L800,560L800,800L560,800ZM216,800L160,744L664,240L560,240L560,160L800,160L800,400L720,400L720,296L216,800ZM367,423L160,216L216,160L423,367L367,423Z" />
 </vector>

app/src/main/res/drawable/ic_shuffle_on_24.xml

@@ -2,10 +2,10 @@
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
     android:width="24dp"
     android:height="24dp"
+    android:tint="?attr/colorPrimary"
     android:viewportWidth="960"
-    android:viewportHeight="960"
-    android:tint="?attr/colorPrimary">
-  <path
-      android:fillColor="@android:color/white"
-      android:pathData="M546,817L546,703L627,703L528,603L607,524L706,623L706,543L820,543L820,817L546,817ZM219,823L140,744L627,257L546,257L546,143L820,143L820,417L706,417L706,336L219,823ZM359,435L140,216L219,137L438,356L359,435Z"/>
+    android:viewportHeight="960">
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M546,817L546,703L627,703L528,603L607,524L706,623L706,543L820,543L820,817L546,817ZM219,823L140,744L627,257L546,257L546,143L820,143L820,417L706,417L706,336L219,823ZM359,435L140,216L219,137L438,356L359,435Z" />
 </vector>

app/src/main/res/drawable/ui_selection_badge_bg.xml

@@ -1,8 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <shape xmlns:android="http://schemas.android.com/apk/res/android"
     android:shape="oval">
-    <solid
-        android:color="?attr/colorPrimary" />
+    <solid android:color="?attr/colorPrimary" />
     <size
         android:width="20dp"
         android:height="20dp" />

app/src/main/res/layout-h480dp/fragment_playback_panel.xml

@@ -16,7 +16,7 @@
         app:title="@string/lbl_playback"
         tools:subtitle="@string/lbl_all_songs" />
 
-    <org.oxycblt.auxio.image.CoverView
+    <org.oxycblt.auxio.playback.ui.SwipeCoverView
         android:id="@+id/playback_cover"
         style="@style/Widget.Auxio.Image.Full"
         android:layout_margin="@dimen/spacing_medium"

app/src/main/res/layout-h480dp/item_playback_song.xml

@@ -0,0 +1,56 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <org.oxycblt.auxio.image.CoverView
+        android:id="@+id/playback_cover"
+        style="@style/Widget.Auxio.Image.Full"
+        android:layout_margin="@dimen/spacing_medium"
+        app:enablePlaybackIndicator="false"
+        app:enableSelectionBadge="false"
+        app:layout_constraintBottom_toTopOf="@id/playback_song"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <TextView
+        android:id="@+id/playback_song"
+        style="@style/Widget.Auxio.TextView.Primary"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="@dimen/spacing_medium"
+        android:layout_marginEnd="@dimen/spacing_medium"
+        app:layout_constraintBottom_toTopOf="@+id/playback_artist"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintVertical_chainStyle="packed"
+        tools:text="Song Name" />
+
+    <TextView
+        android:id="@+id/playback_artist"
+        style="@style/Widget.Auxio.TextView.Secondary.Marquee"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="@dimen/spacing_medium"
+        android:layout_marginEnd="@dimen/spacing_medium"
+        app:layout_constraintBottom_toTopOf="@+id/playback_album"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        tools:text="Artist Name" />
+
+    <TextView
+        android:id="@+id/playback_album"
+        style="@style/Widget.Auxio.TextView.Secondary.Marquee"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="@dimen/spacing_medium"
+        android:layout_marginEnd="@dimen/spacing_medium"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        tools:text="Album Name" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout-h600dp/item_detail_header.xml

@@ -4,18 +4,19 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    android:paddingTop="@dimen/spacing_medium"
     android:paddingStart="@dimen/spacing_medium"
+    android:paddingTop="@dimen/spacing_medium"
     android:paddingEnd="@dimen/spacing_medium"
     android:paddingBottom="@dimen/spacing_mid_medium">
+
     <org.oxycblt.auxio.image.CoverView
         android:id="@+id/detail_cover"
         style="@style/Widget.Auxio.Image.Huge"
+        app:enablePlaybackIndicator="false"
+        app:enableSelectionBadge="false"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent"
-        app:enablePlaybackIndicator="false"
-        app:enableSelectionBadge="false"
         tools:ignore="ContentDescription" />
 
     <TextView

app/src/main/res/layout-land/item_detail_header.xml

@@ -4,18 +4,18 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    android:paddingTop="@dimen/spacing_medium"
     android:paddingStart="@dimen/spacing_medium"
+    android:paddingTop="@dimen/spacing_medium"
     android:paddingEnd="@dimen/spacing_medium"
     android:paddingBottom="@dimen/spacing_mid_medium">
 
     <org.oxycblt.auxio.image.CoverView
         android:id="@+id/detail_cover"
         style="@style/Widget.Auxio.Image.Large"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent"
         app:enablePlaybackIndicator="false"
         app:enableSelectionBadge="false"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
         tools:ignore="ContentDescription" />
 
     <TextView

app/src/main/res/layout-sw600dp/fragment_playback_panel.xml

@@ -16,7 +16,7 @@
         app:title="@string/lbl_playback"
         tools:subtitle="@string/lbl_all_songs" />
 
-    <org.oxycblt.auxio.image.CoverView
+    <org.oxycblt.auxio.playback.ui.SwipeCoverView
         android:id="@+id/playback_cover"
         style="@style/Widget.Auxio.Image.Full"
         android:layout_margin="@dimen/spacing_medium"
@@ -64,7 +64,6 @@
         app:layout_constraintStart_toStartOf="parent"
         tools:text="Album Name" />
 
-
     <org.oxycblt.auxio.playback.ui.StyledSeekBar
         android:id="@+id/playback_seek_bar"
         android:layout_width="match_parent"
@@ -157,4 +156,4 @@
         </androidx.constraintlayout.widget.ConstraintLayout>
     </org.oxycblt.auxio.playback.ui.ForcedLTRFrameLayout>
 
-</androidx.constraintlayout.widget.ConstraintLayout>
+</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout-sw600dp/item_detail_header.xml

@@ -10,9 +10,9 @@
     <org.oxycblt.auxio.image.CoverView
         android:id="@+id/detail_cover"
         style="@style/Widget.Auxio.Image.MidHuge"
-        app:layout_constraintDimensionRatio="1"
         app:enablePlaybackIndicator="false"
         app:enableSelectionBadge="false"
+        app:layout_constraintDimensionRatio="1"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent"
         tools:ignore="ContentDescription" />

app/src/main/res/layout-sw600dp/item_playback_song.xml

@@ -0,0 +1,56 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <org.oxycblt.auxio.image.CoverView
+        android:id="@+id/playback_cover"
+        style="@style/Widget.Auxio.Image.Full"
+        android:layout_margin="@dimen/spacing_medium"
+        app:enablePlaybackIndicator="false"
+        app:enableSelectionBadge="false"
+        app:layout_constraintBottom_toTopOf="@id/playback_song"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <TextView
+        android:id="@+id/playback_song"
+        style="@style/Widget.Auxio.TextView.Primary"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="@dimen/spacing_medium"
+        android:layout_marginEnd="@dimen/spacing_medium"
+        app:layout_constraintBottom_toTopOf="@+id/playback_artist"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintVertical_chainStyle="packed"
+        tools:text="Song Name" />
+
+    <TextView
+        android:id="@+id/playback_artist"
+        style="@style/Widget.Auxio.TextView.Secondary.Marquee"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="@dimen/spacing_medium"
+        android:layout_marginEnd="@dimen/spacing_medium"
+        app:layout_constraintBottom_toTopOf="@+id/playback_album"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        tools:text="Artist Name" />
+
+    <TextView
+        android:id="@+id/playback_album"
+        style="@style/Widget.Auxio.TextView.Secondary.Marquee"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="@dimen/spacing_medium"
+        android:layout_marginEnd="@dimen/spacing_medium"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        tools:text="Album Name" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout-sw840dp/item_detail_header.xml

@@ -9,10 +9,10 @@
     <org.oxycblt.auxio.image.CoverView
         android:id="@+id/detail_cover"
         style="@style/Widget.Auxio.Image.Huge"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent"
         app:enablePlaybackIndicator="false"
         app:enableSelectionBadge="false"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
         tools:ignore="ContentDescription" />
 
     <TextView

app/src/main/res/layout-w600dp-land/fragment_main.xml

@@ -12,11 +12,13 @@
         android:name="androidx.navigation.fragment.NavHostFragment"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
+        app:defaultNavHost="true"
         app:layout_behavior="org.oxycblt.auxio.ui.BottomSheetContentBehavior"
         app:navGraph="@navigation/inner"
-        app:defaultNavHost="true"
         tools:layout="@layout/fragment_home" />
 
+    <View android:id="@+id/main_scrim" android:layout_height="match_parent" android:layout_width="match_parent"/>
+
     <androidx.coordinatorlayout.widget.CoordinatorLayout
         android:id="@+id/playback_sheet"
         android:layout_width="match_parent"
@@ -72,6 +74,8 @@
 
         </androidx.constraintlayout.widget.ConstraintLayout>
 
+        <View android:id="@+id/sheet_scrim" android:layout_height="match_parent" android:layout_width="match_parent"/>
+
     </androidx.coordinatorlayout.widget.CoordinatorLayout>
 
 </androidx.coordinatorlayout.widget.CoordinatorLayout>

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

@@ -1,5 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
+<?xml version="1.0" encoding="utf-8"?><!--
   ~ Copyright (C) 2015 The Android Open Source Project
   ~
   ~ Licensed under the Apache License, Version 2.0 (the "License");
@@ -14,8 +13,7 @@
   ~ See the License for the specific language governing permissions and
   ~ limitations under the License.
 -->
-<FrameLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/container"
@@ -23,29 +21,29 @@
     android:layout_height="match_parent"
     android:fitsSystemWindows="true">
 
-  <androidx.coordinatorlayout.widget.CoordinatorLayout
-      android:id="@+id/coordinator"
-      android:layout_width="match_parent"
-      android:layout_height="match_parent"
-      android:fitsSystemWindows="true">
-
-    <View
-        android:id="@+id/touch_outside"
+    <androidx.coordinatorlayout.widget.CoordinatorLayout
+        android:id="@+id/coordinator"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        android:focusable="false"
-        android:importantForAccessibility="no"
-        android:soundEffectsEnabled="false"
-        tools:ignore="UnusedAttribute"/>
+        android:fitsSystemWindows="true">
 
-    <FrameLayout
-        android:id="@+id/design_bottom_sheet"
-        style="?attr/bottomSheetStyle"
-        android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:layout_gravity="center_horizontal|top"
-        app:layout_behavior="com.google.android.material.bottomsheet.BackportBottomSheetBehavior"/>
+        <View
+            android:id="@+id/touch_outside"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:focusable="false"
+            android:importantForAccessibility="no"
+            android:soundEffectsEnabled="false"
+            tools:ignore="UnusedAttribute" />
 
-  </androidx.coordinatorlayout.widget.CoordinatorLayout>
+        <FrameLayout
+            android:id="@+id/design_bottom_sheet"
+            style="?attr/bottomSheetStyle"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center_horizontal|top"
+            app:layout_behavior="com.google.android.material.bottomsheet.BackportBottomSheetBehavior" />
+
+    </androidx.coordinatorlayout.widget.CoordinatorLayout>
 
 </FrameLayout>

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

@@ -1,11 +1,11 @@
 <?xml version="1.0" encoding="utf-8"?>
 <TextView xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
     android:id="@+id/deletion_info"
     android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:paddingStart="@dimen/spacing_large"
     android:paddingTop="@dimen/spacing_medium"
     android:paddingEnd="@dimen/spacing_large"
-    android:paddingStart="@dimen/spacing_large"
-    android:layout_height="match_parent"
     android:textAppearance="@style/TextAppearance.Auxio.BodyLarge"
-    xmlns:tools="http://schemas.android.com/tools"
-    tools:text="Delete Playlist 16? This cannot be undone."/>
+    tools:text="Delete Playlist 16? This cannot be undone." />

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

@@ -1,24 +1,23 @@
 <?xml version="1.0" encoding="utf-8"?>
-<androidx.constraintlayout.widget.ConstraintLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
+    android:paddingStart="@dimen/spacing_large"
     android:paddingTop="@dimen/spacing_medium"
     android:paddingEnd="@dimen/spacing_large"
-    android:paddingStart="@dimen/spacing_large"
     tools:context=".MainActivity">
 
     <com.google.android.material.card.MaterialCardView
         android:id="@+id/error_container"
+        style="@style/Widget.Material3.CardView.Filled"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
-        style="@style/Widget.Material3.CardView.Filled"
-        app:layout_constraintTop_toTopOf="parent"
         app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintEnd_toEndOf="parent">
+        app:layout_constraintTop_toTopOf="parent">
 
         <FrameLayout
             android:layout_width="match_parent"
@@ -37,12 +36,12 @@
                         android:id="@+id/error_stack_trace"
                         android:layout_width="wrap_content"
                         android:layout_height="wrap_content"
-                        android:paddingTop="@dimen/spacing_medium"
-                        android:paddingStart="@dimen/spacing_medium"
-                        android:paddingBottom="@dimen/spacing_medium"
-                        android:paddingEnd="@dimen/size_copy_button"
                         android:breakStrategy="simple"
                         android:hyphenationFrequency="none"
+                        android:paddingStart="@dimen/spacing_medium"
+                        android:paddingTop="@dimen/spacing_medium"
+                        android:paddingEnd="@dimen/size_copy_button"
+                        android:paddingBottom="@dimen/spacing_medium"
                         android:typeface="monospace"
                         tools:text="Stack trace here" />
 
@@ -56,10 +55,10 @@
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:layout_gravity="bottom|end"
-                app:icon="@drawable/ic_copy_24"
                 android:layout_margin="@dimen/spacing_small"
+                android:src="@drawable/ic_code_24"
                 app:backgroundTint="?attr/colorPrimaryContainer"
-                android:src="@drawable/ic_code_24" />
+                app:icon="@drawable/ic_copy_24" />
 
         </FrameLayout>
     </com.google.android.material.card.MaterialCardView>

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

@@ -30,8 +30,8 @@
             android:layout_marginTop="@dimen/spacing_tiny"
             android:layout_marginEnd="@dimen/spacing_large"
             android:gravity="center"
-            app:layout_constraintTop_toBottomOf="@+id/dirs_mode_header"
             app:checkedButton="@+id/dirs_mode_exclude"
+            app:layout_constraintTop_toBottomOf="@+id/dirs_mode_header"
             app:selectionRequired="true"
             app:singleSelection="true">
 
@@ -41,8 +41,8 @@
                 android:layout_width="0dp"
                 android:layout_height="wrap_content"
                 android:layout_weight="1"
-                tools:icon="@drawable/ic_check_24"
-                android:text="@string/set_dirs_mode_exclude" />
+                android:text="@string/set_dirs_mode_exclude"
+                tools:icon="@drawable/ic_check_24" />
 
             <org.oxycblt.auxio.ui.RippleFixMaterialButton
                 android:id="@+id/dirs_mode_include"
@@ -70,7 +70,7 @@
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:layout_marginTop="@dimen/spacing_medium"
-            app:layout_constraintTop_toBottomOf="@+id/dirs_mode_desc"/>
+            app:layout_constraintTop_toBottomOf="@+id/dirs_mode_desc" />
 
         <TextView
             android:id="@+id/dirs_list_header"
@@ -83,15 +83,15 @@
             app:layout_constraintTop_toBottomOf="@+id/dirs_list_header_divider" />
 
         <org.oxycblt.auxio.ui.RippleFixMaterialButton
-            style="@style/Widget.Auxio.Button.Icon.Small"
             android:id="@+id/dirs_add"
+            style="@style/Widget.Auxio.Button.Icon.Small"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            app:icon="@drawable/ic_add_24"
-            android:contentDescription="@string/lbl_add"
             android:layout_marginEnd="@dimen/spacing_mid_large"
-            app:layout_constraintTop_toBottomOf="@+id/dirs_list_header_divider"
-            app:layout_constraintEnd_toEndOf="@+id/dirs_list_header" />
+            android:contentDescription="@string/lbl_add"
+            app:icon="@drawable/ic_add_24"
+            app:layout_constraintEnd_toEndOf="@+id/dirs_list_header"
+            app:layout_constraintTop_toBottomOf="@+id/dirs_list_header_divider" />
 
         <androidx.recyclerview.widget.RecyclerView
             android:id="@+id/dirs_recycler"
@@ -117,7 +117,7 @@
             android:textAlignment="center"
             android:textAppearance="@style/TextAppearance.Auxio.LabelLarge"
             android:textColor="?android:attr/textColorSecondary"
-            app:layout_constraintTop_toTopOf="@+id/dirs_recycler"/>
+            app:layout_constraintTop_toTopOf="@+id/dirs_recycler" />
 
     </androidx.constraintlayout.widget.ConstraintLayout>
 

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

@@ -0,0 +1,78 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical">
+
+    <TextView
+        android:id="@+id/export_paths_header"
+        style="@style/Widget.Auxio.TextView.Header"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:paddingStart="@dimen/spacing_large"
+        android:paddingEnd="@dimen/spacing_large"
+        android:text="@string/lbl_path_style"
+        app:layout_constraintTop_toTopOf="parent" />
+
+
+    <com.google.android.material.button.MaterialButtonToggleGroup
+        android:id="@+id/export_paths_group"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="@dimen/spacing_large"
+        android:layout_marginTop="@dimen/spacing_tiny"
+        android:layout_marginEnd="@dimen/spacing_large"
+        android:gravity="center"
+        app:checkedButton="@+id/export_relative_paths"
+        app:layout_constraintTop_toBottomOf="@+id/export_paths_header"
+        app:selectionRequired="true"
+        app:singleSelection="true">
+
+        <org.oxycblt.auxio.ui.RippleFixMaterialButton
+            android:id="@+id/export_relative_paths"
+            style="@style/Widget.Material3.Button.OutlinedButton"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:text="@string/lbl_path_style_relative"
+            tools:icon="@drawable/ic_check_24" />
+
+        <org.oxycblt.auxio.ui.RippleFixMaterialButton
+            android:id="@+id/export_absolute_paths"
+            style="@style/Widget.Material3.Button.OutlinedButton"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:text="@string/lbl_path_style_absolute" />
+
+
+    </com.google.android.material.button.MaterialButtonToggleGroup>
+
+    <FrameLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="?attr/selectableItemBackground"
+        android:clickable="true"
+        android:focusable="true"
+        android:orientation="horizontal"
+        android:paddingTop="@dimen/spacing_tiny"
+        android:paddingBottom="@dimen/spacing_tiny">
+
+        <com.google.android.material.checkbox.MaterialCheckBox
+            android:id="@+id/export_windows_paths"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="@dimen/spacing_medium"
+            android:layout_marginEnd="@dimen/spacing_mid_medium"
+            android:clickable="false"
+            android:focusable="false"
+            android:paddingStart="@dimen/spacing_medium"
+            android:text="@string/lbl_windows_paths"
+            android:textAlignment="viewStart"
+            android:textAppearance="@style/TextAppearance.Auxio.BodyLarge"
+            tools:ignore="RtlSymmetry,contentDescription" />
+    </FrameLayout>
+
+</LinearLayout>

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

@@ -1,12 +1,12 @@
 <?xml version="1.0" encoding="utf-8"?>
 <com.google.android.material.textfield.TextInputLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
     android:id="@+id/playlist_container"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
+    android:paddingStart="@dimen/spacing_mid_large"
     android:paddingTop="@dimen/spacing_medium"
     android:paddingEnd="@dimen/spacing_mid_large"
-    android:paddingStart="@dimen/spacing_mid_large"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
     app:hintEnabled="false">
 
     <com.google.android.material.textfield.TextInputEditText

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

@@ -32,10 +32,10 @@
 
     <org.oxycblt.auxio.list.recycler.DialogRecyclerView
         android:id="@+id/sort_mode_recycler"
+        style="@style/Widget.Auxio.RecyclerView.Linear"
         android:layout_width="match_parent"
         android:layout_height="0dp"
         android:layout_weight="1"
-        style="@style/Widget.Auxio.RecyclerView.Linear"
         tools:listitem="@layout/item_sort_mode" />
 
     <androidx.constraintlayout.widget.ConstraintLayout
@@ -54,9 +54,9 @@
             android:id="@+id/sort_direction_group"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
+            android:layout_marginHorizontal="@dimen/spacing_medium"
             android:layout_marginTop="@dimen/spacing_tiny"
             android:gravity="center"
-            android:layout_marginHorizontal="@dimen/spacing_medium"
             app:layout_constraintTop_toBottomOf="@+id/sort_header"
             app:selectionRequired="false"
             app:singleSelection="true"
@@ -97,9 +97,9 @@
             style="@style/Widget.Material3.Button.TextButton.Dialog"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
+            android:layout_marginTop="@dimen/spacing_mid_medium"
             android:layout_marginEnd="@dimen/spacing_medium"
             android:layout_marginBottom="@dimen/spacing_mid_medium"
-            android:layout_marginTop="@dimen/spacing_mid_medium"
             android:text="@string/lbl_ok"
             app:layout_constraintBottom_toBottomOf="parent"
             app:layout_constraintEnd_toEndOf="parent"

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

@@ -42,8 +42,8 @@
 
                 <androidx.constraintlayout.widget.ConstraintLayout
                     android:layout_width="match_parent"
-                    android:paddingBottom="@dimen/spacing_tiny"
-                    android:layout_height="match_parent">
+                    android:layout_height="match_parent"
+                    android:paddingBottom="@dimen/spacing_tiny">
 
                     <ImageView
                         android:id="@+id/about_auxio_icon"
@@ -175,8 +175,8 @@
                 <LinearLayout
                     android:layout_width="match_parent"
                     android:layout_height="match_parent"
-                android:paddingBottom="@dimen/spacing_tiny"
-                    android:orientation="vertical">
+                    android:orientation="vertical"
+                    android:paddingBottom="@dimen/spacing_tiny">
 
                     <TextView
                         android:id="@+id/about_library_counts"

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

@@ -33,8 +33,8 @@
                 android:layout_height="wrap_content"
                 android:clickable="true"
                 android:focusable="true"
-                app:navigationIcon="@drawable/ic_close_24"
-                app:menu="@menu/toolbar_selection" />
+                app:menu="@menu/toolbar_selection"
+                app:navigationIcon="@drawable/ic_close_24" />
 
             <com.google.android.material.appbar.MaterialToolbar
                 android:id="@+id/detail_edit_toolbar"
@@ -42,8 +42,8 @@
                 android:layout_height="wrap_content"
                 android:clickable="true"
                 android:focusable="true"
-                app:navigationIcon="@drawable/ic_close_24"
-                app:menu="@menu/toolbar_edit" />
+                app:menu="@menu/toolbar_edit"
+                app:navigationIcon="@drawable/ic_close_24" />
 
         </org.oxycblt.auxio.ui.MultiToolbar>
 

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

@@ -8,6 +8,7 @@
     android:background="?attr/colorSurface"
     android:transitionGroup="true">
 
+
     <org.oxycblt.auxio.ui.CoordinatorAppBarLayout
         android:id="@+id/home_appbar"
         style="@style/Widget.Auxio.AppBarLayout">
@@ -31,8 +32,8 @@
                 android:layout_height="wrap_content"
                 android:clickable="true"
                 android:focusable="true"
-                app:navigationIcon="@drawable/ic_close_24"
-                app:menu="@menu/toolbar_selection" />
+                app:menu="@menu/toolbar_selection"
+                app:navigationIcon="@drawable/ic_close_24" />
 
         </org.oxycblt.auxio.ui.MultiToolbar>
 
@@ -70,8 +71,8 @@
             android:layout_height="wrap_content"
             android:layout_gravity="center"
             android:layout_margin="@dimen/spacing_medium"
-            android:visibility="invisible"
-            android:fitsSystemWindows="true">
+            android:fitsSystemWindows="true"
+            android:visibility="invisible">
 
             <com.google.android.material.card.MaterialCardView
                 android:layout_width="match_parent"
@@ -110,10 +111,10 @@
                         android:id="@+id/home_indexing_actions"
                         android:layout_width="match_parent"
                         android:layout_height="wrap_content"
-                        android:orientation="horizontal"
                         android:layout_marginStart="@dimen/spacing_medium"
                         android:layout_marginEnd="@dimen/spacing_medium"
                         android:layout_marginBottom="@dimen/spacing_medium"
+                        android:orientation="horizontal"
                         android:visibility="invisible"
                         app:layout_constraintBottom_toBottomOf="parent"
                         tools:layout_editor_absoluteX="16dp">
@@ -147,17 +148,33 @@
     </FrameLayout>
 
     <org.oxycblt.auxio.home.EdgeFrameLayout
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        app:layout_anchor="@id/home_content"
-        app:layout_anchorGravity="bottom|end">
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_gravity="bottom|end"
+        android:clipChildren="false"
+        android:clipToPadding="false"
+        app:layout_anchor="@id/home_content">
 
-        <org.oxycblt.auxio.home.FlipFloatingActionButton
-            android:id="@+id/home_fab"
-            style="@style/Widget.Auxio.FloatingActionButton.Adaptive"
+
+        <org.oxycblt.auxio.home.ThemedSpeedDialView
+            android:id="@+id/home_new_playlist_fab"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:layout_margin="@dimen/spacing_medium" />
+            android:layout_gravity="bottom|end"
+            android:clickable="true"
+            android:focusable="true"
+            android:gravity="bottom|end"
+            app:sdMainFabAnimationRotateAngle="135"
+            app:sdMainFabClosedIconColor="@android:color/white"
+            app:sdMainFabClosedSrc="@drawable/ic_add_24"/>
+
+        <com.google.android.material.floatingactionbutton.FloatingActionButton
+            android:id="@+id/home_shuffle_fab"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:layout_gravity="bottom|end"
+            android:layout_margin="@dimen/spacing_medium"
+            android:src="@drawable/ic_shuffle_off_24" />
 
     </org.oxycblt.auxio.home.EdgeFrameLayout>
 

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

@@ -13,11 +13,13 @@
         android:name="androidx.navigation.fragment.NavHostFragment"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
+        app:defaultNavHost="true"
         app:layout_behavior="org.oxycblt.auxio.ui.BottomSheetContentBehavior"
         app:navGraph="@navigation/inner"
-        app:defaultNavHost="true"
         tools:layout="@layout/fragment_home" />
 
+    <View android:id="@+id/main_scrim" android:layout_height="match_parent" android:layout_width="match_parent"/>
+
     <androidx.coordinatorlayout.widget.CoordinatorLayout
         android:id="@+id/playback_sheet"
         style="@style/Widget.Auxio.DisableDropShadows"
@@ -48,9 +50,9 @@
 
             <androidx.constraintlayout.widget.ConstraintLayout
                 android:id="@+id/queue_handle_wrapper"
-                android:contentDescription="@string/desc_queue_bar"
                 android:layout_width="match_parent"
-                android:layout_height="@dimen/size_bottom_sheet_bar">
+                android:layout_height="@dimen/size_bottom_sheet_bar"
+                android:contentDescription="@string/desc_queue_bar">
 
                 <com.google.android.material.bottomsheet.BottomSheetDragHandleView
                     android:id="@+id/queue_handle"
@@ -81,6 +83,8 @@
 
         </LinearLayout>
 
+        <View android:id="@+id/sheet_scrim" android:layout_height="match_parent" android:layout_width="match_parent"/>
+
     </androidx.coordinatorlayout.widget.CoordinatorLayout>
 
 </androidx.coordinatorlayout.widget.CoordinatorLayout>

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

@@ -16,7 +16,8 @@
         app:title="@string/lbl_playback"
         tools:subtitle="@string/lbl_all_songs" />
 
-    <org.oxycblt.auxio.image.CoverView
+
+    <org.oxycblt.auxio.playback.ui.SwipeCoverView
         android:id="@+id/playback_cover"
         style="@style/Widget.Auxio.Image.Full"
         android:layout_marginStart="@dimen/spacing_medium"
@@ -29,8 +30,6 @@
         app:layout_constraintVertical_chainStyle="packed" />
 
 
-    <!-- Playback information is wrapped in a container so that marquee doesn't break -->
-
     <LinearLayout
         android:id="@+id/playback_info_container"
         android:layout_width="0dp"
@@ -159,4 +158,4 @@
     </org.oxycblt.auxio.playback.ui.ForcedLTRFrameLayout>
 
 
-</androidx.constraintlayout.widget.ConstraintLayout>
+</androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -55,8 +55,8 @@
                 android:layout_height="wrap_content"
                 android:clickable="true"
                 android:focusable="true"
-                app:navigationIcon="@drawable/ic_close_24"
-                app:menu="@menu/toolbar_selection" />
+                app:menu="@menu/toolbar_selection"
+                app:navigationIcon="@drawable/ic_close_24" />
 
         </org.oxycblt.auxio.ui.MultiToolbar>
 

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

@@ -26,9 +26,9 @@
             android:id="@+id/song_track_placeholder"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
-            android:src="@drawable/ic_song_24"
-            android:scaleType="center"
             android:contentDescription="@string/def_track"
+            android:scaleType="center"
+            android:src="@drawable/ic_song_24"
             android:visibility="invisible"
             app:tint="@color/sel_on_cover_bg"
             tools:ignore="ContentDescription" />

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

@@ -5,16 +5,16 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    android:paddingTop="@dimen/spacing_medium"
     android:paddingStart="@dimen/spacing_medium"
+    android:paddingTop="@dimen/spacing_medium"
     android:paddingEnd="@dimen/spacing_medium"
     android:paddingBottom="@dimen/spacing_mid_medium">
 
     <org.oxycblt.auxio.image.CoverView
         android:id="@+id/detail_cover"
+        style="@style/Widget.Auxio.Image.MidHuge"
         app:enablePlaybackIndicator="false"
         app:enableSelectionBadge="false"
-        style="@style/Widget.Auxio.Image.MidHuge"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent"

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

@@ -25,8 +25,8 @@
             android:id="@+id/disc_icon"
             android:layout_width="match_parent"
             android:layout_height="match_parent"
-            android:src="@drawable/ic_album_24"
             android:scaleType="center"
+            android:src="@drawable/ic_album_24"
             app:tint="@color/sel_on_cover_bg"
             tools:ignore="ContentDescription" />
 
@@ -54,9 +54,9 @@
         android:layout_marginEnd="@dimen/spacing_mid_medium"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
-        tools:visibility="gone"
         app:layout_constraintStart_toEndOf="@+id/disc_cover"
         app:layout_constraintTop_toBottomOf="@+id/disc_number"
-        tools:text="Part 1" />
+        tools:text="Part 1"
+        tools:visibility="gone" />
 
 </androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -3,17 +3,17 @@
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
+    android:layout_height="wrap_content"
     android:background="?attr/colorSurface"
-    android:orientation="horizontal"
-    android:layout_height="wrap_content">
+    android:orientation="horizontal">
 
     <TextView
         android:id="@+id/header_title"
         style="@style/Widget.Auxio.TextView.Header"
         android:layout_width="0dp"
-        android:layout_weight="1"
         android:layout_height="wrap_content"
         android:layout_marginEnd="@dimen/spacing_mid_medium"
+        android:layout_weight="1"
         app:layout_constraintEnd_toStartOf="@+id/header_button"
         app:layout_constraintStart_toStartOf="parent"
         tools:text="Songs" />