Added Chunk events in new World category

By: Dinnerbone <dinnerbone@dinnerbone.com>

paper-api/src/main/java/org/bukkit/event/world/ChunkLoadedEvent.java

@@ -0,0 +1,26 @@
+
+package org.bukkit.event.world;
+
+import org.bukkit.Chunk;
+
+/**
+ * Called when a chunk is loaded
+ */
+public class ChunkLoadedEvent extends WorldEvent {
+    private final Chunk chunk;
+
+    public ChunkLoadedEvent(final Type type, final Chunk chunk) {
+        super(type, chunk.getWorld());
+
+        this.chunk = chunk;
+    }
+
+    /**
+     * Gets the chunk being loaded/unloaded
+     *
+     * @return Chunk that triggered this event
+     */
+    public Chunk getChunk() {
+        return chunk;
+    }
+}

paper-api/src/main/java/org/bukkit/event/world/ChunkUnloadedEvent.java

@@ -0,0 +1,25 @@
+
+package org.bukkit.event.world;
+
+import org.bukkit.Chunk;
+import org.bukkit.event.Cancellable;
+
+/**
+ * Called when a chunk is unloaded
+ */
+public class ChunkUnloadedEvent extends ChunkLoadedEvent implements Cancellable {
+    private boolean cancel = false;
+
+    public ChunkUnloadedEvent(final Type type, final Chunk chunk) {
+        super(type, chunk);
+    }
+
+    public boolean isCancelled() {
+        return cancel;
+    }
+
+    public void setCancelled(boolean cancel) {
+        this.cancel = cancel;
+    }
+
+}

paper-api/src/main/java/org/bukkit/event/world/WorldEvent.java

@@ -0,0 +1,27 @@
+
+package org.bukkit.event.world;
+
+import org.bukkit.World;
+import org.bukkit.event.Event;
+
+/**
+ * Represents events within a world
+ */
+public class WorldEvent extends Event {
+    private final World world;
+
+    public WorldEvent(final Type type, final World world) {
+        super(type);
+
+        this.world = world;
+    }
+
+    /**
+     * Gets the world primarily involved with this event
+     *
+     * @return World which caused this event
+     */
+    public World getWorld() {
+        return world;
+    }
+}

paper-api/src/main/java/org/bukkit/event/world/WorldListener.java

@@ -0,0 +1,25 @@
+
+package org.bukkit.event.world;
+
+import org.bukkit.event.Listener;
+
+/**
+ * Handles all World related events
+ */
+public class WorldListener implements Listener {
+    /**
+     * Called when a chunk is loaded
+     *
+     * @param event Relevant event details
+     */
+    public void onChunkLoaded(ChunkLoadedEvent event) {
+    }
+
+    /**
+     * Called when a chunk is unloaded
+     *
+     * @param event Relevant event details
+     */
+    public void onChunkUnloaded(ChunkUnloadedEvent event) {
+    }
+}

paper-api/src/main/java/org/bukkit/plugin/java/JavaPluginLoader.java

@@ -23,6 +23,9 @@ import org.bukkit.event.player.*;
 import org.bukkit.event.server.PluginEvent;
 import org.bukkit.event.server.ServerListener;
 import org.bukkit.event.vehicle.*;
+import org.bukkit.event.world.ChunkLoadedEvent;
+import org.bukkit.event.world.ChunkUnloadedEvent;
+import org.bukkit.event.world.WorldListener;
 import org.bukkit.plugin.*;
 
 /**
@@ -136,6 +139,17 @@ public final class JavaPluginLoader implements PluginLoader {
                     trueListener.onPluginDisabled((PluginEvent)event);
                     break;
             }
+        } else if(listener instanceof WorldListener) {
+            WorldListener trueListener = (WorldListener)listener;
+
+            switch (event.getType()) {
+                case CHUNK_LOADED:
+                    trueListener.onChunkLoaded((ChunkLoadedEvent)event);
+                    break;
+                case CHUNK_UNLOADED:
+                    trueListener.onChunkUnloaded((ChunkUnloadedEvent)event);
+                    break;
+            }
         } else if(listener instanceof EntityListener) {
             EntityListener trueListener = (EntityListener) listener;
             switch(event.getType())