widgets: respond to settings changes

Make it so that widgets respond to settings changes, such as
cover configuration.

app/build.gradle

@@ -110,7 +110,7 @@ dependencies {
 
 task ktlint(type: JavaExec, group: "verification") {
     description = "Check Kotlin code style."
-    mainClass = "com.pinterest.ktlint.Main"
+    mainClass.set("com.pinterest.ktlint.Main")
     classpath = configurations.ktlint
 
     args "src/**/*.kt"
@@ -119,7 +119,7 @@ check.dependsOn ktlint
 
 task ktlintFormat(type: JavaExec, group: "formatting") {
     description = "Fix Kotlin code style deviations."
-    mainClass = "com.pinterest.ktlint.Main"
+    mainClass.set("com.pinterest.ktlint.Main")
     classpath = configurations.ktlint
 
     args "-F", "src/**/*.kt"

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

@@ -16,6 +16,9 @@ import java.lang.reflect.Field
  * views when animated with a stock LayoutTransition. If something breaks on the playback controls
  * or nav bar, this is probably the culprit.
  *
+ * "But oxygencobalt, couldn't you just write your own animation code and run that instea-"
+ * **NO.**
+ *
  * Adapted from this StackOverflow answer:
  * https://stackoverflow.com/a/35087229
  * @author OxygenCobalt

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

@@ -4,15 +4,27 @@ import android.content.Context
 import org.oxycblt.auxio.logD
 import org.oxycblt.auxio.music.Song
 import org.oxycblt.auxio.playback.state.PlaybackStateManager
+import org.oxycblt.auxio.settings.SettingsManager
 
-class WidgetController(private val context: Context) : PlaybackStateManager.Callback {
+/**
+ * A wrapper around each widget subclass that manages which updates to deliver from the
+ * main process's [PlaybackStateManager] and [SettingsManager] instances to the widgets themselves.
+ */
+class WidgetController(private val context: Context) :
+    PlaybackStateManager.Callback,
+    SettingsManager.Callback {
     private val playbackManager = PlaybackStateManager.getInstance()
+    private val settingsManager = SettingsManager.getInstance()
     private val minimal = MinimalWidgetProvider()
 
     init {
         playbackManager.addCallback(this)
+        settingsManager.addCallback(this)
     }
 
+    /*
+     * Initialize a newly added widget. This usually comes from the WIDGET_UPDATE intent.
+     */
     fun initWidget(type: Int) {
         logD("Updating new widget $type")
 
@@ -21,19 +33,28 @@ class WidgetController(private val context: Context) : PlaybackStateManager.Call
         }
     }
 
+    /*
+     * Update every widget, regardless of whether it needs to or not.
+     */
     fun update() {
         logD("Updating all widgets")
 
         minimal.update(context, playbackManager)
     }
 
+    /*
+     * Release this instance, removing the callbacks and resetting all widgets
+     */
     fun release() {
         logD("Resetting widgets")
 
         minimal.reset(context)
         playbackManager.removeCallback(this)
+        settingsManager.removeCallback(this)
     }
 
+    // --- PLAYBACKSTATEMANAGER CALLBACKS ---
+
     override fun onSongUpdate(song: Song?) {
         minimal.update(context, playbackManager)
     }
@@ -41,4 +62,14 @@ class WidgetController(private val context: Context) : PlaybackStateManager.Call
     override fun onPlayingUpdate(isPlaying: Boolean) {
         minimal.update(context, playbackManager)
     }
+
+    // --- SETTINGSMANAGER CALLBACKS ---
+
+    override fun onShowCoverUpdate(showCovers: Boolean) {
+        minimal.update(context, playbackManager)
+    }
+
+    override fun onQualityCoverUpdate(doQualityCovers: Boolean) {
+        minimal.update(context, playbackManager)
+    }
 }