Fixed ChunkWatchEvent.(Un)Watch not firing correctly (#6453)

patches/minecraft/net/minecraft/world/server/ChunkManager.java.patch

@@ -40,11 +40,11 @@
              this.func_219100_a(chunkpos, compoundnbt1);
              return true;
           } catch (Exception exception) {
-@@ -815,6 +820,7 @@
+@@ -711,6 +716,7 @@
-       for(int l = i - this.field_219247_A; l <= i + this.field_219247_A; ++l) {
+ 
-          for(int k = j - this.field_219247_A; k <= j + this.field_219247_A; ++k) {
+    protected void func_219199_a(ServerPlayerEntity p_219199_1_, ChunkPos p_219199_2_, IPacket<?>[] p_219199_3_, boolean p_219199_4_, boolean p_219199_5_) {
-             ChunkPos chunkpos = new ChunkPos(l, k);
+       if (p_219199_1_.field_70170_p == this.field_219255_i) {
-+            net.minecraftforge.event.ForgeEventFactory.fireChunkWatch(p_219234_2_, p_219234_1_, chunkpos, field_219255_i);
++         net.minecraftforge.event.ForgeEventFactory.fireChunkWatch(p_219199_4_, p_219199_5_, p_219199_1_, p_219199_2_, this.field_219255_i);
-             this.func_219199_a(p_219234_1_, chunkpos, new IPacket[2], !p_219234_2_, p_219234_2_);
+          if (p_219199_5_ && !p_219199_4_) {
-          }
+             ChunkHolder chunkholder = this.func_219219_b(p_219199_2_.func_201841_a());
-       }
+             if (chunkholder != null) {

src/main/java/net/minecraftforge/event/ForgeEventFactory.java

@@ -694,6 +694,12 @@ public class ForgeEventFactory
             MinecraftForge.EVENT_BUS.post(new ChunkWatchEvent.UnWatch(entity, chunkpos, world));
     }
 
+    public static void fireChunkWatch(boolean wasLoaded, boolean load, ServerPlayerEntity entity, ChunkPos chunkpos, ServerWorld world)
+    {
+        if (wasLoaded != load)
+            fireChunkWatch(load, entity, chunkpos, world);
+    }
+
     public static boolean onPistonMovePre(World world, BlockPos pos, Direction direction, boolean extending)
     {
         return MinecraftForge.EVENT_BUS.post(new PistonEvent.Pre(world, pos, direction, extending ? PistonEvent.PistonMoveType.EXTEND : PistonEvent.PistonMoveType.RETRACT));

src/main/java/net/minecraftforge/event/world/ChunkWatchEvent.java

@@ -29,7 +29,8 @@ import net.minecraftforge.eventbus.api.Event;
  * If a method utilizes this {@link Event} as its parameter, the method will
  * receive every child event of this class.<br>
  * <br>
- * {@link #chunk} contains the ChunkPos of the Chunk this event is affecting.<br>
+ * {@link #pos} contains the ChunkPos of the Chunk this event is affecting.<br>
+ * {@link #world} contains the World of the Chunk this event is affecting.<br>
  * {@link #player} contains the EntityPlayer that is involved with this chunk being watched. <br>
  * <br>
  * The {@link #player}'s world may not be the same as the world of the chunk
@@ -68,7 +69,7 @@ public class ChunkWatchEvent extends Event
     /**
      * ChunkWatchEvent.Watch is fired when an EntityPlayer begins watching a chunk.<br>
      * This event is fired when a chunk is added to the watched chunks of an EntityPlayer in
-     * {@link PlayerChunkMapEntry#addPlayer(EntityPlayerMP)} and {@link PlayerChunkMapEntry#sendToPlayers()}. <br>
+     * {@link net.minecraft.world.server.ChunkManager#setChunkLoadedAtClient}. <br>
      * <br>
      * This event is not {@link net.minecraftforge.eventbus.api.Cancelable}.<br>
      * <br>
@@ -84,7 +85,7 @@ public class ChunkWatchEvent extends Event
     /**
      * ChunkWatchEvent.UnWatch is fired when an EntityPlayer stops watching a chunk.<br>
      * This event is fired when a chunk is removed from the watched chunks of an EntityPlayer in
-     * {@link PlayerChunkMapEntry#removePlayer(EntityPlayerMP)}. <br>
+     * {@link net.minecraft.world.server.ChunkManager#setChunkLoadedAtClient}. <br>
      * <br>
      * This event is not {@link net.minecraftforge.eventbus.api.Cancelable}.<br>
      * <br>

src/test/java/net/minecraftforge/debug/entity/GravityAttributeTest.java

@@ -53,7 +53,7 @@ import net.minecraftforge.fml.javafmlmod.FMLJavaModLoadingContext;
 @Mod("gravity_attribute_test")
 public class GravityAttributeTest
 {
-    public static final boolean ENABLE = true;
+    public static final boolean ENABLE = false;
     private static Logger logger = LogManager.getLogger();
     private int ticks;
     private static final UUID REDUCED_GRAVITY_ID = UUID.fromString("DEB06000-7979-4242-8888-00000DEB0600");

src/test/java/net/minecraftforge/debug/world/ChunkWatchEventTest.java

@@ -17,31 +17,34 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
-/*
-
-
 package net.minecraftforge.debug.world;
 
-import org.apache.logging.log4j.Logger;
+import it.unimi.dsi.fastutil.objects.Object2IntMap;
-
+import it.unimi.dsi.fastutil.objects.Object2IntOpenHashMap;
+import net.minecraft.util.ResourceLocation;
+import net.minecraft.world.World;
 import net.minecraftforge.common.MinecraftForge;
 import net.minecraftforge.event.world.ChunkWatchEvent;
+import net.minecraftforge.eventbus.api.SubscribeEvent;
 import net.minecraftforge.fml.common.Mod;
-import net.minecraftforge.fml.event.FMLPreInitializationEvent;
+import org.apache.logging.log4j.LogManager;
-import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
+import org.apache.logging.log4j.Logger;
 
-//@Mod(modid = ChunkWatchEventTest.MODID, name = "Chunk Watch Event Test", version = "1.0", acceptableRemoteVersions = "*")
+import javax.annotation.Nullable;
+import java.util.UUID;
+
+@Mod(ChunkWatchEventTest.MODID)
 public class ChunkWatchEventTest
 {
     public static final String MODID = "chunkwatchworldtest";
 
     private static final boolean ENABLED = false;
     private static Logger logger;
+    private static Object2IntMap<UUID> watchedByPlayer = new Object2IntOpenHashMap<>();
 
-    @Mod.EventHandler
+    public ChunkWatchEventTest()
-    public void preInit(FMLPreInitializationEvent event)
     {
-        logger = event.getModLog();
+        logger = LogManager.getLogger();
 
         if (ENABLED)
         {
@@ -52,13 +55,27 @@ public class ChunkWatchEventTest
     @SubscribeEvent
     public static void onUnwatch(ChunkWatchEvent.UnWatch event)
     {
-        logger.info("Unwatching chunk {} in dimension {}. Player's dimension: {} ", event.getChunk(), event.getChunkInstance().getWorld().provider.getDimension(), event.getPlayer().getEntityWorld().provider.getDimension());
+        int watched = watchedByPlayer.getInt(event.getPlayer().getUniqueID());
+        --watched;
+        watchedByPlayer.put(event.getPlayer().getUniqueID(), watched);
+        logger.info("Unwatching chunk {} in dimension {}. Player's dimension: {}, total chunks watched by player {}",
+                event.getPos(), getDimensionName(event.getWorld()), getDimensionName(event.getPlayer().getEntityWorld()),
+                watched);
     }
 
     @SubscribeEvent
     public static void onWatch(ChunkWatchEvent.Watch event)
     {
-        logger.info("Watching chunk {} in dimension {}. Player's dimension: {} ", event.getChunk(), event.getChunkInstance().getWorld().provider.getDimension(), event.getPlayer().getEntityWorld().provider.getDimension());
+        int watched = watchedByPlayer.getInt(event.getPlayer().getUniqueID());
+        ++watched;
+        watchedByPlayer.put(event.getPlayer().getUniqueID(), watched);
+        logger.info("Watching chunk {} in dimension {}. Player's dimension: {}, total chunks watched by player {}",
+                event.getPos(), getDimensionName(event.getWorld()), getDimensionName(event.getPlayer().getEntityWorld()),
+                watched);
+    }
+
+    @Nullable
+    private static ResourceLocation getDimensionName(World w) {
+        return w.getDimension().getType().getRegistryName();
     }
 }
-*/

src/test/resources/META-INF/mods.toml

@@ -53,6 +53,8 @@ loaderVersion="[28,)"
     modId="new_model_loader_test"
 [[mods]]
     modId="forgedebugmultilayermodel"
+[[mods]]
+    modId="chunkwatchworldtest"
 [[mods]]
     modId="trsr_transformer_test"
 [[mods]]