Paper/Spigot-Server-Patches/0391-Use-getChunkIfLoadedImmediately-in-places.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Spottedleaf <Spottedleaf@users.noreply.github.com>
Date: Mon, 8 Jul 2019 00:13:36 -0700
Subject: [PATCH] Use getChunkIfLoadedImmediately in places

This prevents us from hitting chunk loads for chunks at or less-than
ticket level 33 (yes getChunkIfLoaded will actually perform a chunk
load in that case).

diff --git a/src/main/java/net/minecraft/server/PlayerConnection.java b/src/main/java/net/minecraft/server/PlayerConnection.java
index 65c171cec3cc7c7c7433c63b3718fa7e1c16f148..f00653dfe7a769992069582f1743b477edb47eb9 100644
--- a/src/main/java/net/minecraft/server/PlayerConnection.java
+++ b/src/main/java/net/minecraft/server/PlayerConnection.java
@@ -989,7 +989,7 @@ public class PlayerConnection implements PacketListenerPlayIn {
                                 speed = player.abilities.walkSpeed * 10f;
                             }
                             // Paper start - Prevent moving into unloaded chunks
-                            if (player.world.paperConfig.preventMovingIntoUnloadedChunks && (this.player.locX() != toX || this.player.locZ() != toZ) && !worldserver.isChunkLoaded((int) Math.floor(toX) >> 4, (int) Math.floor(toZ) >> 4)) {
+                            if (player.world.paperConfig.preventMovingIntoUnloadedChunks && (this.player.locX() != toX || this.player.locZ() != toZ) && worldserver.getChunkIfLoadedImmediately((int) Math.floor(toX) >> 4, (int) Math.floor(toZ) >> 4) == null) { // Paper - use getIfLoadedImmediately
                                 this.internalTeleport(this.player.locX(), this.player.locY(), this.player.locZ(), this.player.yaw, this.player.pitch, Collections.emptySet());
                                 return;
                             }
diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
index 0bde1717431d770a9a73e83b56388d6f4923e404..311685180fe720706dfb6c82b1b54f9876187b73 100644
--- a/src/main/java/net/minecraft/server/World.java
+++ b/src/main/java/net/minecraft/server/World.java
@@ -116,8 +116,16 @@ public abstract class World implements GeneratorAccess, AutoCloseable {
     }
 
     public Chunk getChunkIfLoaded(int x, int z) {
-        return ((ChunkProviderServer) this.chunkProvider).getChunkAt(x, z, false);
+        return ((ChunkProviderServer) this.chunkProvider).getChunkAtIfLoadedImmediately(x, z); // Paper
     }
+    // Paper start
+    @Override
+    public boolean isChunkLoaded(int x, int z) {
+        return getChunkIfLoaded(x, z) != null;
+    }
+
+
+    // Paper end
 
     protected World(WorldData worlddata, DimensionManager dimensionmanager, BiFunction<World, WorldProvider, IChunkProvider> bifunction, GameProfilerFiller gameprofilerfiller, boolean flag, org.bukkit.generator.ChunkGenerator gen, org.bukkit.World.Environment env) {
         this.spigotConfig = new org.spigotmc.SpigotWorldConfig( worlddata.getName() ); // Spigot
@@ -1109,14 +1117,14 @@ public abstract class World implements GeneratorAccess, AutoCloseable {
     }
 
     public boolean n(BlockPosition blockposition) {
-        return isOutsideWorld(blockposition) ? false : this.chunkProvider.b(blockposition.getX() >> 4, blockposition.getZ() >> 4);
+        return isOutsideWorld(blockposition) ? false : isChunkLoaded(blockposition.getX() >> 4, blockposition.getZ() >> 4); // Paper
     }
 
     public boolean a(BlockPosition blockposition, Entity entity) {
         if (isOutsideWorld(blockposition)) {
             return false;
         } else {
-            IChunkAccess ichunkaccess = this.getChunkAt(blockposition.getX() >> 4, blockposition.getZ() >> 4, ChunkStatus.FULL, false);
+            IChunkAccess ichunkaccess = this.getChunkIfLoadedImmediately(blockposition.getX() >> 4, blockposition.getZ() >> 4); // Paper
 
             return ichunkaccess == null ? false : ichunkaccess.getType(blockposition).a((IBlockAccess) this, blockposition, entity);
         }
@@ -1232,7 +1240,7 @@ public abstract class World implements GeneratorAccess, AutoCloseable {
 
         for (int i1 = i; i1 < j; ++i1) {
             for (int j1 = k; j1 < l; ++j1) {
-                Chunk chunk = ichunkprovider.a(i1, j1);
+                Chunk chunk = (Chunk)this.getChunkIfLoadedImmediately(i1, j1); // Paper
 
                 if (chunk != null) {
                     chunk.a(oclass, axisalignedbb, list, predicate);
diff --git a/src/main/java/org/spigotmc/ActivationRange.java b/src/main/java/org/spigotmc/ActivationRange.java
index f86404f83ae605159307a3ad2cca6c6c314a01af..92601c581cffac471872226abeb93ef9aa24f079 100644
--- a/src/main/java/org/spigotmc/ActivationRange.java
+++ b/src/main/java/org/spigotmc/ActivationRange.java
@@ -143,9 +143,10 @@ public class ActivationRange
             {
                 for ( int j1 = k; j1 <= l; ++j1 )
                 {
-                    if ( world.getWorld().isChunkLoaded( i1, j1 ) )
+                    Chunk chunk = (Chunk) world.getChunkIfLoadedImmediately( i1, j1 );
+                    if ( chunk != null )
                     {
-                        activateChunkEntities( world.getChunkAt( i1, j1 ) );
+                        activateChunkEntities( chunk );
                     }
                 }
             }