add spawner highlighter

src/main/java/de/heckenmann/mc/itemsonground/Configuration.java

@@ -7,6 +7,8 @@ public class Configuration {
    */
   private boolean enabled;
 
+  private boolean spawnerHighlightingEnabled;
+
   /*
    * Refresh-Threshold in ms.
    */
@@ -27,4 +29,12 @@ public void setEnabled(boolean enabled) {
   public boolean isEnabled() {
     return enabled;
   }
+
+  public boolean isSpawnerHighlightingEnabled() {
+    return spawnerHighlightingEnabled;
+  }
+
+  public void setSpawnerHighlightingEnabled(boolean spawnerHighlightingEnabled) {
+    this.spawnerHighlightingEnabled = spawnerHighlightingEnabled;
+  }
 }

src/main/java/de/heckenmann/mc/itemsonground/ItemsOnGroundAddon.java

@@ -14,9 +14,9 @@
 public class ItemsOnGroundAddon extends LabyModAddon {
 
   private final Configuration configuration;
-  private ItemsOnGroundForgeListener listener;
 
   private final String FIELD_NAME_ENABLED = "enabled";
+  private final String FIELD_NAME_SPAWNER_HIGHTLIGHTING_ENABLED = "spawnerHighlightingEnabled";
   private final String FIELD_NAME_REFRESH_THRESHOLD = "refreshThreshold";
 
   public ItemsOnGroundAddon() {
@@ -29,8 +29,9 @@ public void onEnable() {}
   @Override
   public void init(String addonName, UUID uuid) {
     super.init(addonName, uuid);
-    this.listener = new ItemsOnGroundForgeListener(this.configuration);
-    getApi().registerForgeListener(this.listener);
+
+    getApi().registerForgeListener(new ItemsOnGroundHighlighter(this.configuration));
+    getApi().registerForgeListener(new SpawnerHighlighter(this.configuration));
   }
 
   @Override
@@ -39,6 +40,10 @@ public void loadConfig() {
         getConfig().has(FIELD_NAME_ENABLED)
             ? getConfig().get(FIELD_NAME_ENABLED).getAsBoolean()
             : true);
+    this.configuration.setSpawnerHighlightingEnabled(
+        getConfig().has(FIELD_NAME_SPAWNER_HIGHTLIGHTING_ENABLED)
+            ? getConfig().get(FIELD_NAME_SPAWNER_HIGHTLIGHTING_ENABLED).getAsBoolean()
+            : false);
     this.configuration.setRefreshThreshold(
         getConfig().has(FIELD_NAME_REFRESH_THRESHOLD)
             ? getConfig().get(FIELD_NAME_REFRESH_THRESHOLD).getAsInt()
@@ -52,7 +57,7 @@ protected void fillSettings(List<SettingsElement> subSettings) {
         new BooleanElement(
             "Enabled",
             this,
-            new ControlElement.IconData(Material.LEVER),
+            new ControlElement.IconData(Material.REDSTONE_LAMP_ON),
             FIELD_NAME_ENABLED,
             this.configuration.isEnabled()));
     subSettings.add(
@@ -63,5 +68,12 @@ protected void fillSettings(List<SettingsElement> subSettings) {
                 FIELD_NAME_REFRESH_THRESHOLD,
                 this.configuration.getRefreshThreshold())
             .setRange(0, 2000));
+    subSettings.add(
+        new BooleanElement(
+            "Spawner highlighting",
+            this,
+            new ControlElement.IconData(Material.MOB_SPAWNER),
+            FIELD_NAME_SPAWNER_HIGHTLIGHTING_ENABLED,
+            this.configuration.isSpawnerHighlightingEnabled()));
   }
 }

src/main/java/de/heckenmann/mc/itemsonground/ItemsOnGroundHighlighter.java

@@ -1,27 +1,30 @@
 package de.heckenmann.mc.itemsonground;
 
 import net.minecraft.client.Minecraft;
-import net.minecraft.client.particle.*;
+import net.minecraft.client.particle.Particle;
+import net.minecraft.client.particle.ParticleCloud;
+import net.minecraft.client.particle.ParticleFlame;
 import net.minecraft.entity.Entity;
 import net.minecraft.entity.item.EntityItem;
-import net.minecraft.tileentity.TileEntityMobSpawner;
-import net.minecraft.util.math.BlockPos;
 import net.minecraft.world.World;
 import net.minecraftforge.client.event.FOVUpdateEvent;
 import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
 
-import java.util.stream.IntStream;
 import java.util.stream.Stream;
 
-/** @author heckenmann */
-public class ItemsOnGroundForgeListener {
+/**
+ * Dieser Listener highlightet Items, die auf dem Boden liegen.
+ *
+ * @author heckenmann
+ */
+public class ItemsOnGroundHighlighter {
 
   private long lastTriggerTimestamp = 0;
   private ParticleFlame.Factory particleFlameFactory;
   private ParticleCloud.Factory particleCloudFactory;
   private final Configuration configuration;
 
-  public ItemsOnGroundForgeListener(Configuration configuration) {
+  public ItemsOnGroundHighlighter(Configuration configuration) {
     this.configuration = configuration;
     this.createParticleFactory();
   }
@@ -31,16 +34,16 @@ public void onTick(FOVUpdateEvent event) {
     World world = Minecraft.getMinecraft().world;
     long currentTriggerTimestamp = System.currentTimeMillis();
     long timestampDelta = currentTriggerTimestamp - this.lastTriggerTimestamp;
-    if (!this.configuration.isEnabled()
-        || world == null
+    if (world == null
+        || !this.configuration.isEnabled()
         || timestampDelta < this.configuration.getRefreshThreshold()) return;
     this.lastTriggerTimestamp = currentTriggerTimestamp;
-    // Highlight Items on Ground
+
     world
         .getLoadedEntityList()
         .parallelStream()
         .filter(entity -> EntityItem.class.equals(entity.getClass()))
-        .filter(entity -> entity.onGround || entity.isAirBorne)
+        // .filter(entity -> entity.onGround || entity.isAirBorne)
         .map(entity -> createParticles(world, entity))
         .flatMap(particleStream -> particleStream)
         .sequential()

src/main/java/de/heckenmann/mc/itemsonground/SpawnerHighlighter.java

@@ -0,0 +1,58 @@
+package de.heckenmann.mc.itemsonground;
+
+import net.minecraft.client.Minecraft;
+import net.minecraft.client.particle.IParticleFactory;
+import net.minecraft.client.particle.Particle;
+import net.minecraft.client.particle.ParticleTotem;
+import net.minecraft.tileentity.TileEntityMobSpawner;
+import net.minecraft.util.math.BlockPos;
+import net.minecraft.world.World;
+import net.minecraftforge.client.event.FOVUpdateEvent;
+import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
+
+import java.util.stream.IntStream;
+import java.util.stream.Stream;
+
+/** Dieser Listener highlightet Spawner über die gesamte Y-Achse. */
+public class SpawnerHighlighter {
+
+  private long lastTriggerTimestamp = 0;
+  private final long thresholdMinMs = 500;
+  private final Configuration configuration;
+  private final IParticleFactory particleFactory;
+
+  public SpawnerHighlighter(Configuration configuration) {
+    this.configuration = configuration;
+    this.particleFactory = new ParticleTotem.Factory();
+  }
+
+  @SubscribeEvent
+  public void onTick(FOVUpdateEvent event) {
+    World world = Minecraft.getMinecraft().world;
+    long currentTriggerTimestamp = System.currentTimeMillis();
+    long timestampDelta = currentTriggerTimestamp - this.lastTriggerTimestamp;
+    if (world == null
+        || !this.configuration.isEnabled()
+        || !this.configuration.isSpawnerHighlightingEnabled()
+        || timestampDelta < this.configuration.getRefreshThreshold() + this.thresholdMinMs) return;
+    this.lastTriggerTimestamp = currentTriggerTimestamp;
+
+    world
+        .loadedTileEntityList
+        .parallelStream()
+        .filter(entity -> TileEntityMobSpawner.class.equals(entity.getClass()))
+        .map(entity -> createParticlesForSpawner(world, entity.getPos()))
+        .flatMap(particleStream -> particleStream)
+        .sequential()
+        .forEach(particle -> Minecraft.getMinecraft().effectRenderer.addEffect(particle));
+  }
+
+  private Stream<Particle> createParticlesForSpawner(World world, BlockPos position) {
+    return IntStream.range(1, world.getActualHeight())
+        .asDoubleStream()
+        .mapToObj(
+            d ->
+                this.particleFactory.createParticle(
+                    0, world, position.getX() + 0.5d, d, position.getZ() + 0.5d, 0.0, 1.0, 0.0));
+  }
+}