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/level/WorldServer.java b/src/main/java/net/minecraft/server/level/WorldServer.java
index bb6c59237702bf82d2c344c864f233c606fd429f..96723cac5723ea97780dd3b8697c4ba598788afc 100644
--- a/src/main/java/net/minecraft/server/level/WorldServer.java
+++ b/src/main/java/net/minecraft/server/level/WorldServer.java
@@ -207,7 +207,7 @@ 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/net/minecraft/server/network/PlayerConnection.java b/src/main/java/net/minecraft/server/network/PlayerConnection.java
index fa0b7edf42243d53d9dc897903b9b9e902b33cf7..eee5b3e4645ae41f63aba8898c58f43402d31b73 100644
--- a/src/main/java/net/minecraft/server/network/PlayerConnection.java
+++ b/src/main/java/net/minecraft/server/network/PlayerConnection.java
@@ -1244,7 +1244,7 @@ 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/world/level/World.java b/src/main/java/net/minecraft/world/level/World.java
index 15da3511a9e57c320f4cf409852bee07109095bc..b620d7e0d824c8d0758a66a8fbe872c3e45103d2 100644
--- a/src/main/java/net/minecraft/world/level/World.java
+++ b/src/main/java/net/minecraft/world/level/World.java
@@ -164,6 +164,13 @@ 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
+
     public ResourceKey<DimensionManager> getTypeKey() {
         return typeKey;
     }
@@ -1062,14 +1069,14 @@ 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);
         }
@@ -1190,7 +1197,7 @@ 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 58d22363124a9343188d8c19476e5a92f2f0b80b..53d0541aba207b5eaea2e49edbb56df918d30333 100644
--- a/src/main/java/org/spigotmc/ActivationRange.java
+++ b/src/main/java/org/spigotmc/ActivationRange.java
@@ -140,9 +140,10 @@ 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 );
                     }
                 }
             }