home: make toolbar collapse

Make the home toolbar collapse on scroll.

I was planning to implement this back in 2.0.0, but visual bugs stopped
me. Now, knowing how much space the the Toolbar + Tab combination takes
up on smaller devices, I think it would be better to have this in
general.

app/src/main/AndroidManifest.xml

@@ -67,6 +67,10 @@
             </intent-filter>
         </activity>
 
+        <!--
+        IndexerService handles querying the media database,
+        extracting metadata, and constructing the music library.
+        -->
         <service
             android:name=".music.IndexerService"
             android:foregroundServiceType="dataSync"
@@ -74,6 +78,9 @@
             android:exported="false"
             android:roundIcon="@mipmap/ic_launcher" />
 
+        <!--
+        PlaybackService handles music playback, system components, and state saving.
+        -->
         <service
             android:name=".playback.system.PlaybackService"
             android:foregroundServiceType="mediaPlayback"
@@ -81,7 +88,6 @@
             android:exported="false"
             android:roundIcon="@mipmap/ic_launcher" />
 
-
         <!--
         Work around apps that blindly query for ACTION_MEDIA_BUTTON working.
         See the class for more info.
@@ -94,7 +100,7 @@
             </intent-filter>
         </receiver>
 
-        <!-- Auxio's one and only AppWidget -->
+        <!-- Auxio's one and only AppWidget. -->
         <receiver
             android:name=".widgets.WidgetProvider"
             android:exported="false"

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

@@ -34,7 +34,9 @@ import androidx.navigation.fragment.findNavController
 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.tabs.TabLayoutMediator
+import kotlin.math.abs
 import org.oxycblt.auxio.R
 import org.oxycblt.auxio.databinding.FragmentHomeBinding
 import org.oxycblt.auxio.home.list.AlbumListFragment
@@ -86,6 +88,18 @@ class HomeFragment : ViewBindingFragment<FragmentHomeBinding>(), Toolbar.OnMenuI
                 indexerModel.reindex()
             }
 
+        binding.homeAppbar.apply {
+            addOnOffsetChangedListener(
+                AppBarLayout.OnOffsetChangedListener { _, offset ->
+                    val range = binding.homeAppbar.totalScrollRange
+
+                    binding.homeToolbar.alpha = 1f - (abs(offset.toFloat()) / (range.toFloat() / 2))
+
+                    binding.homePager.updatePadding(
+                        bottom = binding.homeAppbar.totalScrollRange + offset)
+                })
+        }
+
         binding.homeToolbar.apply {
             sortItem = menu.findItem(R.id.submenu_sorting)
             setOnMenuItemClickListener(this@HomeFragment)

app/src/main/java/org/oxycblt/auxio/home/list/HomeListFragment.kt

@@ -29,6 +29,7 @@ import org.oxycblt.auxio.ui.Item
 import org.oxycblt.auxio.ui.MenuItemListener
 import org.oxycblt.auxio.ui.NavigationViewModel
 import org.oxycblt.auxio.ui.ViewBindingFragment
+import org.oxycblt.auxio.util.applySpans
 
 /**
  * A Base [Fragment] implementing the base features shared across all list fragments in the home UI.
@@ -49,6 +50,7 @@ abstract class HomeListFragment<T : Item> :
     override fun onBindingCreated(binding: FragmentHomeListBinding, savedInstanceState: Bundle?) {
         binding.homeRecycler.popupProvider = this
         binding.homeRecycler.listener = this
+        binding.homeRecycler.applySpans()
     }
 
     override fun onDestroyBinding(binding: FragmentHomeListBinding) {

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

@@ -36,8 +36,11 @@ import org.oxycblt.auxio.ui.Sort
 import org.oxycblt.auxio.util.logD
 
 /**
- * The [ViewModel] for the search functionality
+ * The [ViewModel] for search functionality
  * @author OxygenCobalt
+ *
+ * TODO: Add a context to this ViewModel, not because I want to, but because it just makes the code
+ * easier to work with.
  */
 class SearchViewModel : ViewModel() {
     private val musicStore = MusicStore.getInstance()
@@ -143,9 +146,9 @@ class SearchViewModel : ViewModel() {
      */
     private fun <T : Music> List<T>.filterByOrNull(context: Context, value: String): List<T>? {
         val filtered = filter {
-            // First see if the normal item name will work. If that fails, try the "normalized"
+            // Compare normalized names, which are names with unicode characters that are
-            // [e.g all accented/unicode chars become latin chars] instead. Hopefully this
+            // normalized to their non-unicode forms. This is just for quality-of-life,
-            // shouldn't break other language's search functionality.
+            // and I hope it doesn't bork search functionality for other languages.
             it.resolveNameNormalized(context).contains(value, ignoreCase = true) ||
                 it.resolveNameNormalized(context).contains(value, ignoreCase = true)
         }

app/src/main/java/org/oxycblt/auxio/settings/AboutFragment.kt

@@ -74,23 +74,26 @@ class AboutFragment : ViewBindingFragment<FragmentAboutBinding>() {
 
     private fun updateSongCount(songs: List<Song>) {
         val binding = requireBinding()
-        binding.aboutSongCount.textSafe = getString(R.string.fmt_song_count, songs.size)
+        binding.aboutSongCount.textSafe = getString(R.string.fmt_lib_song_count, songs.size)
         binding.aboutTotalDuration.textSafe =
             getString(
-                R.string.fmt_total_duration, songs.sumOf { it.durationSecs }.formatDuration(false))
+                R.string.fmt_lib_total_duration,
+                songs.sumOf { it.durationSecs }.formatDuration(false))
     }
 
     private fun updateAlbumCount(albums: List<Album>) {
-        requireBinding().aboutAlbumCount.textSafe = getString(R.string.fmt_album_count, albums.size)
+        requireBinding().aboutAlbumCount.textSafe =
+            getString(R.string.fmt_lib_album_count, albums.size)
     }
 
     private fun updateArtistCount(artists: List<Artist>) {
         requireBinding().aboutArtistCount.textSafe =
-            getString(R.string.fmt_artist_count, artists.size)
+            getString(R.string.fmt_lib_artist_count, artists.size)
     }
 
     private fun updateGenreCount(genres: List<Genre>) {
-        requireBinding().aboutGenreCount.textSafe = getString(R.string.fmt_genre_count, genres.size)
+        requireBinding().aboutGenreCount.textSafe =
+            getString(R.string.fmt_lib_genre_count, genres.size)
     }
 
     /** Go through the process of opening a [link] in a browser. */

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

@@ -218,8 +218,8 @@ class SyncBackingData<T>(adapter: RecyclerView.Adapter<*>, diffCallback: DiffUti
 
 /**
  * Like [AsyncListDiffer], but synchronous. This may seem like it would be inefficient, but in
- * practice Auxio's lists tend to be small enough to the point where this does not matter,
+ * practice Auxio's lists tend to be small enough to the point where this does not matter, and
- * and situations that would be inefficient are ruled out with [SyncBackingData.replaceList].
+ * situations that would be inefficient are ruled out with [SyncBackingData.replaceList].
  */
 private class SyncListDiffer<T>(
     adapter: RecyclerView.Adapter<*>,
@@ -301,7 +301,7 @@ private class SyncListDiffer<T>(
                             }
                         }
                     })
-            
+
             _currentList = newList
             result.dispatchUpdatesTo(updateCallback)
         }

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

@@ -39,6 +39,8 @@ import org.oxycblt.auxio.util.getDrawableSafe
  * useful for the playback buttons, as at times highlighting them is not enough to differentiate
  * them.
  * @author OxygenCobalt
+ *
+ * TODO: Remove this for Material Buttons (I hope)
  */
 class StyledImageButton
 @JvmOverloads

app/src/main/java/org/oxycblt/auxio/widgets/WidgetProvider.kt

@@ -183,7 +183,7 @@ class WidgetProvider : AppWidgetProvider() {
                     logW("No good widget layout found")
 
                     val minimum =
-                        unlikelyToBeNull(views.minByOrNull { it.key.width * it.key.height }?.value)
+                        unlikelyToBeNull(views.minByOrNull { it.key.width * it.key.height }).value
 
                     updateAppWidget(id, minimum)
                 }

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

@@ -14,6 +14,7 @@
             android:id="@+id/home_toolbar"
             style="@style/Widget.Auxio.Toolbar"
             app:menu="@menu/menu_home"
+            app:layout_scrollFlags="scroll|enterAlways"
             app:title="@string/info_app_name" />
 
         <com.google.android.material.tabs.TabLayout

app/src/main/res/values-ar-rIQ/strings.xml

@@ -161,7 +161,7 @@
     <string name="clr_grey">رمادي</string>
 
     <!-- Format Namespace | Value formatting/plurals -->
-    <string name="fmt_song_count">الاغنية المُحملة: %d</string>
+    <string name="fmt_lib_song_count">الاغنية المُحملة: %d</string>
 
     <plurals name="fmt_song_count">
         <item quantity="zero">%d اغاني</item>

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

@@ -190,11 +190,11 @@
 
     <string name="fmt_indexing">Načítání hudební knihovny… (%1$d/%2$d)</string>
 
-    <string name="fmt_song_count">Načtených skladeb: %d</string>
+    <string name="fmt_lib_song_count">Načtených skladeb: %d</string>
-    <string name="fmt_album_count">Načtených alb: %d</string>
+    <string name="fmt_lib_album_count">Načtených alb: %d</string>
-    <string name="fmt_artist_count">Načtených umělců: %d</string>
+    <string name="fmt_lib_artist_count">Načtených umělců: %d</string>
-    <string name="fmt_genre_count">Načtených žánrů: %d</string>
+    <string name="fmt_lib_genre_count">Načtených žánrů: %d</string>
-    <string name="fmt_total_duration">Celková doba trvání: %s</string>
+    <string name="fmt_lib_total_duration">Celková doba trvání: %s</string>
 
     <plurals name="fmt_song_count">
         <item quantity="one">"%d skladba"</item>

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

@@ -146,7 +146,7 @@
     <string name="clr_grey">Grau</string>
 
     <!-- Format Namespace | Value formatting/plurals -->
-    <string name="fmt_song_count">Geladene Lieder: %d</string>
+    <string name="fmt_lib_song_count">Geladene Lieder: %d</string>
 
     <plurals name="fmt_song_count">
         <item quantity="one">%d Lied</item>
@@ -191,8 +191,8 @@
     <string name="fmt_disc_no">Schallplatte %d</string>
     <string name="fmt_db_pos">+%.1f dB</string>
     <string name="fmt_db_neg">-%.1f dB</string>
-    <string name="fmt_album_count">Geladene Alben: %d</string>
+    <string name="fmt_lib_album_count">Geladene Alben: %d</string>
-    <string name="fmt_artist_count">Geladene Künstler: %d</string>
+    <string name="fmt_lib_artist_count">Geladene Künstler: %d</string>
-    <string name="fmt_genre_count">Geladene Genres: %d</string>
+    <string name="fmt_lib_genre_count">Geladene Genres: %d</string>
-    <string name="fmt_total_duration">Gesamtdauer: %s</string>
+    <string name="fmt_lib_total_duration">Gesamtdauer: %s</string>
 </resources>

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

@@ -74,7 +74,7 @@
     <string name="clr_grey">Γκρί</string>
 
     <!-- Format Namespace | Value formatting/plurals -->
-    <string name="fmt_song_count">Τραγούδια φορτώθηκε: %d</string>
+    <string name="fmt_lib_song_count">Τραγούδια φορτώθηκε: %d</string>
 
     <plurals name="fmt_song_count">
         <item quantity="one">%d Τραγούδι</item>

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

@@ -165,7 +165,7 @@
     <string name="clr_grey">Gris</string>
 
     <!-- Format Namespace | Value formatting/plurals -->
-    <string name="fmt_song_count">Canciones cargadas: %d</string>
+    <string name="fmt_lib_song_count">Canciones cargadas: %d</string>
 
     <plurals name="fmt_song_count">
         <item quantity="one">%d Canción</item>

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

@@ -80,7 +80,7 @@
     <string name="clr_grey">Gris</string>
 
     <!-- Format Namespace | Value formatting/plurals -->
-    <string name="fmt_song_count">Titres chargés: %d</string>
+    <string name="fmt_lib_song_count">Titres chargés: %d</string>
 
     <plurals name="fmt_song_count">
         <item quantity="one">%s Titre</item>

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

@@ -168,11 +168,11 @@
     <string name="clr_grey">Grigio</string>
 
     <!-- Format Namespace | Value formatting/plurals -->
-    <string name="fmt_song_count">Canzoni trovate: %d</string>
+    <string name="fmt_lib_song_count">Canzoni trovate: %d</string>
-    <string name="fmt_album_count">Dischi trovati: %d</string>
+    <string name="fmt_lib_album_count">Dischi trovati: %d</string>
-    <string name="fmt_artist_count">Artisti trovati: %d</string>
+    <string name="fmt_lib_artist_count">Artisti trovati: %d</string>
-    <string name="fmt_genre_count">Generi trovati: %d</string>
+    <string name="fmt_lib_genre_count">Generi trovati: %d</string>
-    <string name="fmt_total_duration">Durata totale: %s</string>
+    <string name="fmt_lib_total_duration">Durata totale: %s</string>
 
     <plurals name="fmt_song_count">
         <item quantity="one">%d canzone</item>

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

@@ -186,11 +186,11 @@
     <string name="fmt_db_pos">+%.1f dB</string>
     <string name="fmt_db_neg">-%.1f dB</string>
 
-    <string name="fmt_song_count">불러온 음악: %d</string>
+    <string name="fmt_lib_song_count">불러온 음악: %d</string>
-    <string name="fmt_album_count">불러온 앨범: %d</string>
+    <string name="fmt_lib_album_count">불러온 앨범: %d</string>
-    <string name="fmt_artist_count">불러온 아티스트: %d</string>
+    <string name="fmt_lib_artist_count">불러온 아티스트: %d</string>
-    <string name="fmt_genre_count">불러온 장르: %d</string>
+    <string name="fmt_lib_genre_count">불러온 장르: %d</string>
-    <string name="fmt_total_duration">총 길이: %s</string>
+    <string name="fmt_lib_total_duration">총 길이: %s</string>
 
     <plurals name="fmt_song_count">
         <item quantity="other">%d 곡</item>

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

@@ -133,7 +133,7 @@
     <string name="clr_grey">Grijis</string>
 
     <!-- Format Namespace | Value formatting/plurals -->
-    <string name="fmt_song_count">Nummers geladen: %d</string>
+    <string name="fmt_lib_song_count">Nummers geladen: %d</string>
 
     <plurals name="fmt_song_count">
         <item quantity="one">%d Nummer</item>

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

@@ -78,7 +78,7 @@
     <string name="clr_grey">Szary</string>
 
     <!-- Format Namespace | Value formatting/plurals -->
-    <string name="fmt_song_count">Utwory uruchamia się: %d</string>
+    <string name="fmt_lib_song_count">Utwory uruchamia się: %d</string>
 
     <plurals name="fmt_song_count">
         <item quantity="one">%d Utwór</item>

app/src/main/res/values-pt-rBR/strings.xml

@@ -79,7 +79,7 @@
     <string name="clr_grey">Grisalho</string>
 
     <!-- Format Namespace | Value formatting/plurals -->
-    <string name="fmt_song_count">Músicas carregado: %d</string>
+    <string name="fmt_lib_song_count">Músicas carregado: %d</string>
 
     <plurals name="fmt_song_count">
         <item quantity="one">%d Música</item>

app/src/main/res/values-pt-rPT/strings.xml

@@ -80,7 +80,7 @@
     <string name="clr_grey">Grisalho</string>
 
     <!-- Format Namespace | Value formatting/plurals -->
-    <string name="fmt_song_count">Músicas carregado: %d</string>
+    <string name="fmt_lib_song_count">Músicas carregado: %d</string>
 
     <plurals name="fmt_song_count">
         <item quantity="one">%d Música</item>

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

@@ -166,7 +166,7 @@
     <string name="clr_grey">Серый</string>
 
     <!-- Format Namespace | Value formatting/plurals -->
-    <string name="fmt_song_count">Всего треков: %d</string>
+    <string name="fmt_lib_song_count">Всего треков: %d</string>
 
     <plurals name="fmt_song_count">
         <item quantity="one">%d трек</item>

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

@@ -60,7 +60,7 @@
     <string name="desc_play_pause">Відтворити/Зупинити</string>
 
     <!-- Format Namespace | Value formatting/plurals -->
-    <string name="fmt_song_count">Пісні завантажено: %d</string>
+    <string name="fmt_lib_song_count">Пісні завантажено: %d</string>
 
     <plurals name="fmt_song_count">
         <item quantity="one">%d Пісня</item>

app/src/main/res/values-zh-rCN/strings.xml

@@ -167,7 +167,7 @@
     <string name="clr_grey">灰色</string>
 
     <!-- Format Namespace | Value formatting/plurals -->
-    <string name="fmt_song_count">已加载 %d 首曲目</string>
+    <string name="fmt_lib_song_count">已加载 %d 首曲目</string>
 
     <plurals name="fmt_song_count">
         <item quantity="other">"%d 首歌曲"</item>

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

@@ -192,11 +192,11 @@
 
     <string name="fmt_indexing">Loading your music library… (%1$d/%2$d)</string>
 
-    <string name="fmt_song_count">Songs loaded: %d</string>
+    <string name="fmt_lib_song_count">Songs loaded: %d</string>
-    <string name="fmt_album_count">Albums loaded: %d</string>
+    <string name="fmt_lib_album_count">Albums loaded: %d</string>
-    <string name="fmt_artist_count">Artists loaded: %d</string>
+    <string name="fmt_lib_artist_count">Artists loaded: %d</string>
-    <string name="fmt_genre_count">Genres loaded: %d</string>
+    <string name="fmt_lib_genre_count">Genres loaded: %d</string>
-    <string name="fmt_total_duration">Total duration: %s</string>
+    <string name="fmt_lib_total_duration">Total duration: %s</string>
 
     <plurals name="fmt_song_count">
         <item quantity="one">%d Song</item>