playback: add remember pause setting

This setting allows you to remain playing/paused when you move in the
queue or edit the queue. Useful for some people who like this behavior
more than always playing.

Resolves #568.

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

@@ -58,6 +58,8 @@ interface PlaybackSettings : Settings<PlaybackSettings.Listener> {
     val rewindWithPrev: Boolean
     /** Whether a song should pause after every repeat. */
     val pauseOnRepeat: Boolean
+    /** Whether to maintain the play/pause state when skipping or editing the queue */
+    val rememberPause: Boolean
 
     interface Listener {
         /** Called when one of the ReplayGain configurations have changed. */
@@ -129,6 +131,9 @@ class PlaybackSettingsImpl @Inject constructor(@ApplicationContext context: Cont
     override val pauseOnRepeat: Boolean
         get() = sharedPreferences.getBoolean(getString(R.string.set_key_repeat_pause), false)
 
+    override val rememberPause: Boolean
+        get() = sharedPreferences.getBoolean(getString(R.string.set_key_remember_pause), false)
+
     override fun migrate() {
         // MusicMode was converted to PlaySong in 3.2.0
         fun Int.migrateMusicMode() =

app/src/main/java/org/oxycblt/auxio/playback/state/PlaybackStateManager.kt

@@ -456,7 +456,6 @@ class PlaybackStateManagerImpl @Inject constructor() : PlaybackStateManager {
         val stateHolder = stateHolder ?: return
         logD("Going to next song")
         stateHolder.next()
-        stateHolder.playing(true)
     }
 
     @Synchronized
@@ -464,7 +463,6 @@ class PlaybackStateManagerImpl @Inject constructor() : PlaybackStateManager {
         val stateHolder = stateHolder ?: return
         logD("Going to previous song")
         stateHolder.prev()
-        stateHolder.playing(true)
     }
 
     @Synchronized
@@ -472,7 +470,6 @@ class PlaybackStateManagerImpl @Inject constructor() : PlaybackStateManager {
         val stateHolder = stateHolder ?: return
         logD("Going to index $index")
         stateHolder.goto(index)
-        stateHolder.playing(true)
     }
 
     @Synchronized
@@ -643,10 +640,6 @@ class PlaybackStateManagerImpl @Inject constructor() : PlaybackStateManager {
                         rawQueue = rawQueue,
                     )
 
-                if (change.type == QueueChange.Type.SONG) {
-                    stateHolder.playing(true)
-                }
-
                 listeners.forEach {
                     it.onQueueChanged(stateMirror.queue, stateMirror.index, change)
                 }

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

@@ -316,6 +316,9 @@ class PlaybackService :
 
     override fun next() {
         player.seekToNext()
+        if (!playbackSettings.rememberPause) {
+            player.play()
+        }
         playbackManager.ack(this, StateAck.IndexMoved)
         // Deferred save is handled on position discontinuity
     }
@@ -326,6 +329,9 @@ class PlaybackService :
         } else {
             player.seekToPreviousMediaItem()
         }
+        if (!playbackSettings.rememberPause) {
+            player.play()
+        }
         playbackManager.ack(this, StateAck.IndexMoved)
         // Deferred save is handled on position discontinuity
     }
@@ -338,6 +344,9 @@ class PlaybackService :
 
         val trueIndex = indices[index]
         player.seekTo(trueIndex, C.TIME_UNSET)
+        if (!playbackSettings.rememberPause) {
+            player.play()
+        }
         playbackManager.ack(this, StateAck.IndexMoved)
         // Deferred save is handled on position discontinuity
     }
@@ -396,7 +405,11 @@ class PlaybackService :
         }
 
         val trueIndex = indices[at]
+        val songWillChange = player.currentMediaItemIndex == trueIndex
         player.removeMediaItem(trueIndex)
+        if (songWillChange && !playbackSettings.rememberPause) {
+            player.play()
+        }
         playbackManager.ack(this, ack)
         deferSave()
     }

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

@@ -32,7 +32,6 @@ import org.oxycblt.auxio.playback.PlaybackViewModel
 import org.oxycblt.auxio.settings.ui.WrappedDialogPreference
 import org.oxycblt.auxio.util.logD
 import org.oxycblt.auxio.util.navigateSafe
-import org.oxycblt.auxio.util.showToast
 
 /**
  * The [PreferenceFragmentCompat] that displays the root settings list.

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

@@ -32,9 +32,7 @@
     <string name="set_key_keep_shuffle" translatable="false">KEY_KEEP_SHUFFLE</string>
     <string name="set_key_rewind_prev" translatable="false">KEY_PREV_REWIND</string>
     <string name="set_key_repeat_pause" translatable="false">KEY_LOOP_PAUSE</string>
-    <string name="set_key_save_state" translatable="false">auxio_save_state</string>
-    <string name="set_key_wipe_state" translatable="false">auxio_wipe_state</string>
-    <string name="set_key_restore_state" translatable="false">auxio_restore_state</string>
+    <string name="set_key_remember_pause" translatable="false">auxio_remember_pause</string>
 
     <string name="set_key_home_tabs" translatable="false">auxio_home_tabs</string>
     <string name="set_key_hide_collaborators" translatable="false">auxio_hide_collaborators</string>

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

@@ -288,6 +288,8 @@
     <string name="set_rewind_prev_desc">Rewind before skipping to the previous song</string>
     <string name="set_repeat_pause">Pause on repeat</string>
     <string name="set_repeat_pause_desc">Pause when a song repeats</string>
+    <string name="set_remember_pause">Remember pause</string>
+    <string name="set_remember_pause_desc">Remain playing/paused when skipping or editing queue</string>
     <string name="set_replay_gain">ReplayGain</string>
     <string name="set_replay_gain_mode">ReplayGain strategy</string>
     <string name="set_replay_gain_mode_track">Prefer track</string>

app/src/main/res/xml/preferences_audio.xml

@@ -21,6 +21,12 @@
             app:summary="@string/set_repeat_pause_desc"
             app:title="@string/set_repeat_pause" />
 
+        <SwitchPreferenceCompat
+            app:defaultValue="false"
+            app:key="@string/set_key_remember_pause"
+            app:summary="@string/set_remember_pause_desc"
+            app:title="@string/set_remember_pause" />
+
     </PreferenceCategory>
 
     <PreferenceCategory android:title="@string/set_replay_gain">