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 70d3b429bfe08f1d2e5a3ac8368d8221770d5307..092e49ae11ff735cf0179de8e0aaa73f7842e372 100644
--- a/src/main/java/net/minecraft/server/PlayerConnection.java
+++ b/src/main/java/net/minecraft/server/PlayerConnection.java
@@ -1015,7 +1015,7 @@ 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 d3ab8299e759a30a04ec0d575a4b40a78ca1558d..8913e915b91b85a1f3efdc97809466f7933511d4 100644
--- a/src/main/java/net/minecraft/server/World.java
+++ b/src/main/java/net/minecraft/server/World.java
@@ -104,6 +104,13 @@ public abstract class World implements GeneratorAccess, AutoCloseable {
         return (CraftServer) Bukkit.getServer();
     }
 
+    // Paper start
+    @Override
+    public boolean isChunkLoaded(int x, int z) {
+        return ((WorldServer)this).getChunkIfLoaded(x, z) != null;
+    }
+    // Paper end
+
     protected World(WorldDataMutable worlddatamutable, ResourceKey<World> resourcekey, ResourceKey<DimensionManager> resourcekey1, DimensionManager dimensionmanager, Supplier<GameProfilerFiller> supplier, boolean flag, boolean flag1, long i, org.bukkit.generator.ChunkGenerator gen, org.bukkit.World.Environment env, java.util.concurrent.Executor executor) {
         this.spigotConfig = new org.spigotmc.SpigotWorldConfig(((WorldDataServer) worlddatamutable).getName()); // Spigot
         this.paperConfig = new com.destroystokyo.paper.PaperWorldConfig((((WorldDataServer)worlddatamutable).getName()), this.spigotConfig); // Paper
@@ -1039,14 +1046,14 @@ public abstract class World implements GeneratorAccess, AutoCloseable {
     }
 
     public boolean p(BlockPosition blockposition) {
-        return isOutsideWorld(blockposition) ? false : this.getChunkProvider().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, EnumDirection enumdirection) {
         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, enumdirection);
         }
@@ -1167,7 +1174,7 @@ 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/net/minecraft/server/WorldServer.java b/src/main/java/net/minecraft/server/WorldServer.java
index d88e7e24d5fdd8caa075fe2aaf22f11f611e31bd..2c61b97ed1571f2032b29b142a839f012a0c2cac 100644
--- a/src/main/java/net/minecraft/server/WorldServer.java
+++ b/src/main/java/net/minecraft/server/WorldServer.java
@@ -90,7 +90,7 @@ public class WorldServer extends World implements GeneratorAccessSeed {
     }
 
     @Override public Chunk getChunkIfLoaded(int x, int z) { // Paper - this was added in world too but keeping here for NMS ABI
-        return this.chunkProvider.getChunkAt(x, z, false);
+        return this.chunkProvider.getChunkAtIfLoadedImmediately(x, z); // Paper
     }
 
     // Paper start - Asynchronous IO
diff --git a/src/main/java/org/spigotmc/ActivationRange.java b/src/main/java/org/spigotmc/ActivationRange.java
index 78f0fb5d97b077673ec542cd70bbc3ffa13f916c..b73af0a5fb2d08c2f3a52c699ef0d8ed34c83f77 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 );
                     }
                 }
             }