From f1245d7d405725ff8653b169904ea10b7ca253f7 Mon Sep 17 00:00:00 2001
From: OxygenCobalt <oxycblt@abstractr.net>
Date: Sat, 13 Feb 2021 10:20:48 -0700
Subject: [PATCH] Improve layout responsiveness

Make layouts better on all screen sizes.
---
 .github/CONTRIBUTING.md                       |   2 +-
 .../main/java/org/oxycblt/auxio/AuxioApp.kt   |   5 +-
 .../org/oxycblt/auxio/coil/AlbumArtFetcher.kt |   2 +-
 .../org/oxycblt/auxio/coil/MosaicFetcher.kt   |  13 +-
 .../java/org/oxycblt/auxio/ui/ActionMenu.kt   |   2 +-
 .../org/oxycblt/auxio/ui/InterfaceUtils.kt    |  15 +-
 .../res/layout-land/fragment_playback.xml     |  20 +-
 .../res/layout-xlarge/fragment_playback.xml   | 214 ++++++++++++++++++
 app/src/main/res/values-de/strings.xml        |   6 +-
 info/ARCHITECTURE.md                          |   2 +-
 10 files changed, 247 insertions(+), 34 deletions(-)
 create mode 100644 app/src/main/res/layout-xlarge/fragment_playback.xml

diff --git a/.github/CONTRIBUTING.md b/.github/CONTRIBUTING.md
index 155787fc9..75c2c7895 100644
--- a/.github/CONTRIBUTING.md
+++ b/.github/CONTRIBUTING.md
@@ -31,7 +31,7 @@ If you do make a request, provide the following:
 - Why do you think it will benefit everyone's usage of the app?
 
 If you have the knowledge, you can also implement the feature yourself and create a [Pull Request](https://github.com/OxygenCobalt/Auxio/pulls), but its recommended that **you create an issue beforehand to give me a heads up.**
-Its also recommended that you read about [Auxio's Architecture](../info/ARCHITECTURE.md) so that your change does not harm the codebase.
+Its also recommended that you read about [Auxio's Architecture](../info/ARCHITECTURE.md) as well to make changes better and more efficient.
 
 ## Translations
 
diff --git a/app/src/main/java/org/oxycblt/auxio/AuxioApp.kt b/app/src/main/java/org/oxycblt/auxio/AuxioApp.kt
index 75d5d6771..e0cdb2a3a 100644
--- a/app/src/main/java/org/oxycblt/auxio/AuxioApp.kt
+++ b/app/src/main/java/org/oxycblt/auxio/AuxioApp.kt
@@ -17,11 +17,8 @@ class AuxioApp : Application(), ImageLoaderFactory {
     }
 
     override fun newImageLoader(): ImageLoader {
-        // Don't cache images on-disk [The covers are already on-disk]
-        // Crossfade by default
-        // Use a transparent placeholder
         return ImageLoader.Builder(applicationContext)
-            .diskCachePolicy(CachePolicy.DISABLED)
+            .diskCachePolicy(CachePolicy.DISABLED) // Not downloading anything, so no disk-caching
             .crossfade(true)
             .placeholder(android.R.color.transparent)
             .build()
diff --git a/app/src/main/java/org/oxycblt/auxio/coil/AlbumArtFetcher.kt b/app/src/main/java/org/oxycblt/auxio/coil/AlbumArtFetcher.kt
index eda026938..0d2a34d7f 100644
--- a/app/src/main/java/org/oxycblt/auxio/coil/AlbumArtFetcher.kt
+++ b/app/src/main/java/org/oxycblt/auxio/coil/AlbumArtFetcher.kt
@@ -77,5 +77,5 @@ class AlbumArtFetcher(private val context: Context) : Fetcher<Album> {
         return loadMediaStoreCovers(data)
     }
 
-    override fun key(data: Album) = data.id.toString()
+    override fun key(data: Album) = data.coverUri.toString()
 }
diff --git a/app/src/main/java/org/oxycblt/auxio/coil/MosaicFetcher.kt b/app/src/main/java/org/oxycblt/auxio/coil/MosaicFetcher.kt
index d332dd664..01edae029 100644
--- a/app/src/main/java/org/oxycblt/auxio/coil/MosaicFetcher.kt
+++ b/app/src/main/java/org/oxycblt/auxio/coil/MosaicFetcher.kt
@@ -83,7 +83,7 @@ class MosaicFetcher(private val context: Context) : Fetcher<Parent> {
     }
 
     /**
-     * Create the mosaic, Code adapted from Phonograph
+     * Create the mosaic image, Code adapted from Phonograph
      * https://github.com/kabouzeid/Phonograph
      */
     private fun drawMosaic(streams: List<InputStream>): Bitmap {
@@ -122,16 +122,13 @@ class MosaicFetcher(private val context: Context) : Fetcher<Parent> {
     }
 
     /**
-     * Iterate through a list of [Closeable]s, running [use] on each.
-     * @param action What to do for each [Closeable]
+     * Iterate through a list of [Closeable]s, running [block] on each and closing it when done.
      */
-    private fun <T : Closeable> List<T>.useForEach(action: (T) -> Unit) {
-        forEach {
-            it.use(action)
-        }
+    private fun <T : Closeable> List<T>.useForEach(block: (T) -> Unit) {
+        forEach { it.use(block) }
     }
 
-    override fun key(data: Parent): String = data.id.toString()
+    override fun key(data: Parent): String = data.hashCode().toString()
     override fun handles(data: Parent) = data !is Album // Albums are not used here
 
     companion object {
diff --git a/app/src/main/java/org/oxycblt/auxio/ui/ActionMenu.kt b/app/src/main/java/org/oxycblt/auxio/ui/ActionMenu.kt
index 5a94672a6..1f2d9b7a6 100644
--- a/app/src/main/java/org/oxycblt/auxio/ui/ActionMenu.kt
+++ b/app/src/main/java/org/oxycblt/auxio/ui/ActionMenu.kt
@@ -33,7 +33,7 @@ fun Fragment.newMenu(anchor: View, data: BaseModel, flag: Int = ActionMenu.FLAG_
  * @param activity [AppCompatActivity] required as both a context and ViewModelStore owner.
  * @param anchor [View] This should be centered around
  * @param data [BaseModel] this menu corresponds to
- * @param flag Any extra flags to accompany the data. See [FLAG_NONE], [FLAG_IN_ALBUM], [FLAG_IN_ARTIST], [FLAG_IN_GENRE] for more detials.
+ * @param flag Any extra flags to accompany the data. See [FLAG_NONE], [FLAG_IN_ALBUM], [FLAG_IN_ARTIST], [FLAG_IN_GENRE] for more details.
  * @throws IllegalArgumentException When there is no menu for this specific datatype/flag
  */
 class ActionMenu(
diff --git a/app/src/main/java/org/oxycblt/auxio/ui/InterfaceUtils.kt b/app/src/main/java/org/oxycblt/auxio/ui/InterfaceUtils.kt
index 21d918929..3e6f8f466 100644
--- a/app/src/main/java/org/oxycblt/auxio/ui/InterfaceUtils.kt
+++ b/app/src/main/java/org/oxycblt/auxio/ui/InterfaceUtils.kt
@@ -162,13 +162,22 @@ fun isTablet(resources: Resources): Boolean {
 }
 
 /**
- * Get the span count for most RecyclerViews
+ * Determine if the tablet is XLARGE, ignoring normal tablets.
+ */
+fun isXLTablet(resources: Resources): Boolean {
+    val layout = resources.configuration.screenLayout and Configuration.SCREENLAYOUT_SIZE_MASK
+
+    return layout == Configuration.SCREENLAYOUT_SIZE_XLARGE
+}
+
+/**
+ * Get the span count for most RecyclerViews. These probably work right on most displays. Trust me.
  */
 fun RecyclerView.getSpans(): Int {
     return if (isLandscape(resources)) {
-        if (isTablet(resources)) 3 else 2
+        if (isXLTablet(resources)) 3 else 2
     } else {
-        if (isTablet(resources)) 2 else 1
+        if (isXLTablet(resources)) 2 else 1
     }
 }
 
diff --git a/app/src/main/res/layout-land/fragment_playback.xml b/app/src/main/res/layout-land/fragment_playback.xml
index 255579cfa..a5b07b5d9 100644
--- a/app/src/main/res/layout-land/fragment_playback.xml
+++ b/app/src/main/res/layout-land/fragment_playback.xml
@@ -4,9 +4,6 @@
     xmlns:tools="http://schemas.android.com/tools"
     tools:context=".playback.PlaybackFragment">
 
-    <!-- FIXME: Way controls are designed can cause problems on displays 4.5 inch or smaller.
-          Need to fix it but the way I did it with the other layouts will create bad spacing here -->
-
     <data>
 
         <variable
@@ -154,7 +151,7 @@
             tools:text="11:38" />
 
         <TextView
-            android:id="@+id/playback_song_container_duration"
+            android:id="@+id/playback_song_duration"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_marginEnd="@dimen/margin_mid_large"
@@ -166,25 +163,25 @@
         <ImageButton
             android:id="@+id/playback_loop"
             style="@style/Widget.Button.Unbounded"
-            android:layout_marginEnd="@dimen/margin_large"
+            android:layout_marginStart="@dimen/margin_mid_small"
             android:contentDescription="@string/description_change_loop"
             android:onClick="@{() -> playbackModel.incrementLoopStatus()}"
             android:src="@drawable/ic_loop"
             app:layout_constraintBottom_toBottomOf="@+id/playback_skip_prev"
-            app:layout_constraintEnd_toStartOf="@+id/playback_skip_prev"
             app:layout_constraintHorizontal_chainStyle="packed"
+            app:layout_constraintStart_toStartOf="@+id/playback_duration_current"
             app:layout_constraintTop_toTopOf="@+id/playback_skip_prev" />
 
         <ImageButton
             android:id="@+id/playback_skip_prev"
             style="@style/Widget.Button.Unbounded"
-            android:layout_marginEnd="@dimen/margin_large"
             android:background="@drawable/ui_unbounded_ripple"
             android:contentDescription="@string/description_skip_prev"
             android:onClick="@{() -> playbackModel.skipPrev()}"
             android:src="@drawable/ic_skip_prev"
             app:layout_constraintBottom_toBottomOf="@+id/playback_play_pause"
             app:layout_constraintEnd_toStartOf="@+id/playback_play_pause"
+            app:layout_constraintStart_toEndOf="@+id/playback_loop"
             app:layout_constraintTop_toTopOf="@+id/playback_play_pause" />
 
         <ImageButton
@@ -193,34 +190,33 @@
             android:contentDescription="@string/description_play_pause"
             android:onClick="@{() -> playbackModel.invertPlayingStatus()}"
             app:layout_constraintBottom_toBottomOf="parent"
-            app:layout_constraintEnd_toEndOf="@+id/playback_song_container_duration"
+            app:layout_constraintEnd_toEndOf="@+id/playback_song_duration"
             app:layout_constraintStart_toStartOf="@+id/playback_duration_current"
             app:layout_constraintTop_toBottomOf="@+id/playback_duration_current"
             tools:src="@drawable/ic_play_to_pause" />
 
-
         <ImageButton
             android:id="@+id/playback_skip_next"
             style="@style/Widget.Button.Unbounded"
-            android:layout_marginStart="@dimen/margin_large"
             android:background="@drawable/ui_unbounded_ripple"
             android:contentDescription="@string/description_skip_next"
             android:onClick="@{() -> playbackModel.skipNext()}"
             android:src="@drawable/ic_skip_next"
             app:layout_constraintBottom_toBottomOf="@+id/playback_play_pause"
+            app:layout_constraintEnd_toStartOf="@+id/playback_shuffle"
             app:layout_constraintStart_toEndOf="@+id/playback_play_pause"
             app:layout_constraintTop_toTopOf="@+id/playback_play_pause" />
 
         <ImageButton
             android:id="@+id/playback_shuffle"
             style="@style/Widget.Button.Unbounded"
-            android:layout_marginStart="@dimen/margin_large"
             android:background="@drawable/ui_unbounded_ripple"
             android:contentDescription="@{playbackModel.isShuffling() ? @string/description_shuffle_off : @string/description_shuffle_on"
             android:onClick="@{() -> playbackModel.invertShuffleStatus()}"
             android:src="@drawable/ic_shuffle"
+            android:layout_marginEnd="@dimen/margin_mid_small"
             app:layout_constraintBottom_toBottomOf="@+id/playback_skip_next"
-            app:layout_constraintStart_toEndOf="@+id/playback_skip_next"
+            app:layout_constraintEnd_toEndOf="@+id/playback_song_duration"
             app:layout_constraintTop_toTopOf="@+id/playback_skip_next" />
 
     </androidx.constraintlayout.widget.ConstraintLayout>
diff --git a/app/src/main/res/layout-xlarge/fragment_playback.xml b/app/src/main/res/layout-xlarge/fragment_playback.xml
new file mode 100644
index 000000000..ff6606ac4
--- /dev/null
+++ b/app/src/main/res/layout-xlarge/fragment_playback.xml
@@ -0,0 +1,214 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layout 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"
+    tools:context=".playback.PlaybackFragment">
+
+    <data>
+
+        <variable
+            name="song"
+            type="org.oxycblt.auxio.music.Song" />
+
+        <variable
+            name="playbackModel"
+            type="org.oxycblt.auxio.playback.PlaybackViewModel" />
+
+        <variable
+            name="detailModel"
+            type="org.oxycblt.auxio.detail.DetailViewModel" />
+    </data>
+
+
+    <androidx.constraintlayout.widget.ConstraintLayout
+        android:id="@+id/playback_layout"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:background="@color/background"
+        android:fitsSystemWindows="true">
+
+        <androidx.appcompat.widget.Toolbar
+            android:id="@+id/playback_toolbar"
+            style="@style/Toolbar.Style.Icon"
+            android:elevation="0dp"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent"
+            app:menu="@menu/menu_playback"
+            app:navigationIcon="@drawable/ic_down"
+            app:title="@string/label_playback" />
+
+        <ImageView
+            android:id="@+id/playback_cover"
+            android:layout_width="0dp"
+            android:layout_height="0dp"
+            android:layout_margin="@dimen/margin_mid_huge"
+            android:contentDescription="@{@string/description_album_cover(song.name)}"
+            android:elevation="@dimen/elevation_normal"
+            android:outlineProvider="bounds"
+            app:albumArt="@{song}"
+            app:layout_constraintBottom_toTopOf="@+id/playback_song"
+            app:layout_constraintDimensionRatio="1:1"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@+id/playback_toolbar"
+            tools:src="@drawable/ic_song" />
+
+        <TextView
+            android:id="@+id/playback_song"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="@dimen/margin_mid_huge"
+            android:layout_marginEnd="@dimen/margin_mid_huge"
+            android:ellipsize="marquee"
+            android:fontFamily="@font/inter_semibold"
+            android:marqueeRepeatLimit="marquee_forever"
+            android:onClick="@{() -> detailModel.navToItem(playbackModel.song)}"
+            android:singleLine="true"
+            android:text="@{song.name}"
+            android:textAlignment="viewStart"
+            android:textAppearance="@style/TextAppearance.MaterialComponents.Headline6"
+            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"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="@dimen/margin_mid_huge"
+            android:layout_marginEnd="@dimen/margin_mid_huge"
+            android:ellipsize="end"
+            android:onClick="@{() -> detailModel.navToItem(playbackModel.song.album.artist)}"
+            android:singleLine="true"
+            android:text="@{song.album.artist.name}"
+            android:textAlignment="viewStart"
+            android:textAppearance="@style/TextAppearance.MaterialComponents.Subtitle1"
+            android:textColor="?android:attr/textColorSecondary"
+            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"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="@dimen/margin_mid_huge"
+            android:layout_marginEnd="@dimen/margin_mid_huge"
+            android:layout_marginBottom="@dimen/margin_medium"
+            android:ellipsize="end"
+            android:onClick="@{() -> detailModel.navToItem(playbackModel.song.album)}"
+            android:singleLine="true"
+            android:text="@{song.album.name}"
+            android:textAlignment="viewStart"
+            android:textAppearance="@style/TextAppearance.MaterialComponents.Subtitle1"
+            android:textColor="?android:attr/textColorSecondary"
+            app:layout_constraintBottom_toTopOf="@+id/playback_seek_bar"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            tools:text="Album Name" />
+
+        <SeekBar
+            android:id="@+id/playback_seek_bar"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:clickable="true"
+            android:focusable="true"
+            android:paddingStart="@dimen/margin_mid_huge"
+            android:paddingEnd="@dimen/margin_mid_huge"
+            android:progressBackgroundTint="?android:attr/colorControlNormal"
+            android:progressTint="?attr/colorPrimary"
+            android:splitTrack="false"
+            android:thumbOffset="@dimen/offset_thumb"
+            android:thumbTint="?attr/colorPrimary"
+            app:layout_constraintBottom_toTopOf="@+id/playback_duration_current"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintStart_toStartOf="parent"
+            tools:progress="70" />
+
+        <TextView
+            android:id="@+id/playback_duration_current"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="@dimen/margin_mid_huge"
+            android:layout_marginBottom="@dimen/margin_medium"
+            app:layout_constraintBottom_toTopOf="@+id/playback_play_pause"
+            app:layout_constraintStart_toStartOf="parent"
+            tools:text="11:38" />
+
+        <TextView
+            android:id="@+id/playback_song_duration"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginEnd="@dimen/margin_mid_huge"
+            android:layout_marginBottom="@dimen/margin_medium"
+            android:text="@{song.formattedDuration}"
+            app:layout_constraintBottom_toTopOf="@+id/playback_play_pause"
+            app:layout_constraintEnd_toEndOf="parent"
+            tools:text="16:16" />
+
+        <ImageButton
+            android:id="@+id/playback_loop"
+            style="@style/Widget.Button.Unbounded"
+            android:layout_marginEnd="@dimen/margin_large"
+            android:contentDescription="@string/description_change_loop"
+            android:onClick="@{() -> playbackModel.incrementLoopStatus()}"
+            android:src="@drawable/ic_loop"
+            app:layout_constraintBottom_toBottomOf="@+id/playback_skip_prev"
+            app:layout_constraintEnd_toStartOf="@+id/playback_skip_prev"
+            app:layout_constraintHorizontal_chainStyle="packed"
+            app:layout_constraintTop_toTopOf="@+id/playback_skip_prev" />
+
+        <ImageButton
+            android:id="@+id/playback_skip_prev"
+            style="@style/Widget.Button.Unbounded"
+            android:layout_marginEnd="@dimen/margin_large"
+            android:background="@drawable/ui_unbounded_ripple"
+            android:contentDescription="@string/description_skip_prev"
+            android:onClick="@{() -> playbackModel.skipPrev()}"
+            android:src="@drawable/ic_skip_prev"
+            app:layout_constraintBottom_toBottomOf="@+id/playback_play_pause"
+            app:layout_constraintEnd_toStartOf="@+id/playback_play_pause"
+            app:layout_constraintTop_toTopOf="@+id/playback_play_pause" />
+
+        <ImageButton
+            android:id="@+id/playback_play_pause"
+            style="@style/PlayPause"
+            android:layout_marginBottom="@dimen/margin_large"
+            android:contentDescription="@string/description_play_pause"
+            android:onClick="@{() -> playbackModel.invertPlayingStatus()}"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintEnd_toEndOf="@+id/playback_song_duration"
+            app:layout_constraintStart_toStartOf="@+id/playback_duration_current"
+            tools:src="@drawable/ic_play_to_pause" />
+
+
+        <ImageButton
+            android:id="@+id/playback_skip_next"
+            style="@style/Widget.Button.Unbounded"
+            android:layout_marginStart="@dimen/margin_large"
+            android:background="@drawable/ui_unbounded_ripple"
+            android:contentDescription="@string/description_skip_next"
+            android:onClick="@{() -> playbackModel.skipNext()}"
+            android:src="@drawable/ic_skip_next"
+            app:layout_constraintBottom_toBottomOf="@+id/playback_play_pause"
+            app:layout_constraintStart_toEndOf="@+id/playback_play_pause"
+            app:layout_constraintTop_toTopOf="@+id/playback_play_pause" />
+
+        <ImageButton
+            android:id="@+id/playback_shuffle"
+            style="@style/Widget.Button.Unbounded"
+            android:layout_marginStart="@dimen/margin_large"
+            android:background="@drawable/ui_unbounded_ripple"
+            android:contentDescription="@{playbackModel.isShuffling() ? @string/description_shuffle_off : @string/description_shuffle_on"
+            android:onClick="@{() -> playbackModel.invertShuffleStatus()}"
+            android:src="@drawable/ic_shuffle"
+            app:layout_constraintBottom_toBottomOf="@+id/playback_skip_next"
+            app:layout_constraintStart_toEndOf="@+id/playback_skip_next"
+            app:layout_constraintTop_toTopOf="@+id/playback_skip_next" />
+
+
+    </androidx.constraintlayout.widget.ConstraintLayout>
+</layout>
\ No newline at end of file
diff --git a/app/src/main/res/values-de/strings.xml b/app/src/main/res/values-de/strings.xml
index 884ecae3d..dfd09bec9 100644
--- a/app/src/main/res/values-de/strings.xml
+++ b/app/src/main/res/values-de/strings.xml
@@ -3,7 +3,7 @@
     <!-- Info namespace | App labels -->
     <string name="info_app_desc">Ein einfacher und flexibeler Musik-Player für Android.</string>
     <string name="info_channel_name">Musikwiedergabe</string>
-    <string name="info_service_desc">der Musikwiedergabe-Service von Auxio</string>
+    <string name="info_service_desc">der Musikwiedergabe-Dienst von Auxio</string>
 
     <!-- Label Namespace | Static Labels -->
     <string name="label_retry">Wieder Versuchen</string>
@@ -82,8 +82,8 @@
     <string name="setting_behavior_at_end">Wenn eine Abspielliste zu Ende ist</string>
     <string name="setting_behavior_end_loop_pause">Weiderholen und Pausieren</string>
     <string name="setting_behavior_end_loop">Weiderholen</string>
-    <string name="setting_behavior_end_stop">Halten</string>
-    <string name="setting_behavior_keep_shuffle">Shuffle-Einstellung merken</string>
+    <string name="setting_behavior_end_stop">Stoppen</string>
+    <string name="setting_behavior_keep_shuffle">Zufällig-Einstellung merken</string>
     <string name="setting_behavior_keep_shuffle_desc">Lassen Zufällig an, wenn ein neues Lied anspielen</string>
     <string name="setting_behavior_rewind_prev">Zurückspulen, bevor zurück springen</string>
     <string name="setting_behavior_rewind_prev_desc">Zurückspulen, bevor zum vorheriger Lied springen</string>
diff --git a/info/ARCHITECTURE.md b/info/ARCHITECTURE.md
index 57a161ae1..0869da64a 100644
--- a/info/ARCHITECTURE.md
+++ b/info/ARCHITECTURE.md
@@ -111,7 +111,7 @@ PlaybackStateManager───────────────────┘
 
 `PlaybackStateManager` is the shared object that contains the master copy of the playback state, doing all operations on it. This object should ***NEVER*** be used in a UI, as it does not sanitize input and can cause major problems if a Volatile UI interacts with it. It's callback system is also prone to memory leaks if not cleared when done. `PlaybackViewModel` should be used instead, as it exposes stable data and safe functions that UI's can use to interact with the playback state.
 
-`PlaybackService`'s job is to use the playback state to manage the ExoPlayer instance and also modify the state depending on system events, such as when a button is pressed on a headset. It should **never** be bound to, mostly because there is no need given that `PlaybackViewModel` exposes the same data in a much safer fashion.
+`PlaybackService`'s job is to use the playback state to manage the ExoPlayer instance and notification and also modify the state depending on system events, such as when a button is pressed on a headset. It should **never** be bound to, mostly because there is no need given that `PlaybackViewModel` exposes the same data in a much safer fashion.
 
 #### `.recycler`