Paper/patches/server/0712-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/level/ServerLevel.java b/src/main/java/net/minecraft/server/level/ServerLevel.java
index f28aefd9192b26f39e71826fa87cca60a799be39..f8c0574137cab33d0b5efe5d532efb132dcb914a 100644
--- a/src/main/java/net/minecraft/server/level/ServerLevel.java
+++ b/src/main/java/net/minecraft/server/level/ServerLevel.java
@@ -203,7 +203,7 @@ public class ServerLevel extends Level implements WorldGenLevel {
     }
 
     @Override public LevelChunk getChunkIfLoaded(int x, int z) { // Paper - this was added in world too but keeping here for NMS ABI
-        return this.chunkSource.getChunk(x, z, false);
+        return this.chunkSource.getChunkAtIfLoadedImmediately(x, z); // Paper
     }
 
     // Paper start
diff --git a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
index 373280eed4acd146a3c71d944030382bc3c5067e..e639cbdf9cf070e749da4c90ff475b250ab8e2c9 100644
--- a/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
+++ b/src/main/java/net/minecraft/server/network/ServerGamePacketListenerImpl.java
@@ -1310,7 +1310,7 @@ public class ServerGamePacketListenerImpl implements ServerPlayerConnection, Ser
                                 speed = this.player.getAbilities().walkingSpeed * 10f;
                             }
                             // Paper start - Prevent moving into unloaded chunks
-                            if (player.level.paperConfig.preventMovingIntoUnloadedChunks && (this.player.getX() != toX || this.player.getZ() != toZ) && !worldserver.hasChunk((int) Math.floor(toX) >> 4, (int) Math.floor(toZ) >> 4)) {
+                            if (player.level.paperConfig.preventMovingIntoUnloadedChunks && (this.player.getX() != toX || this.player.getZ() != toZ) && worldserver.getChunkIfLoadedImmediately((int) Math.floor(toX) >> 4, (int) Math.floor(toZ) >> 4) == null) { // Paper - use getIfLoadedImmediately
                                 this.internalTeleport(this.player.getX(), this.player.getY(), this.player.getZ(), this.player.getYRot(), this.player.getXRot(), Collections.emptySet(), true);
                                 return;
                             }
diff --git a/src/main/java/net/minecraft/world/level/Level.java b/src/main/java/net/minecraft/world/level/Level.java
index acc8625790f8852391725ebe49057d3924bf908e..59703eb6610c21df22f25c22cc884c4450f0316c 100644
--- a/src/main/java/net/minecraft/world/level/Level.java
+++ b/src/main/java/net/minecraft/world/level/Level.java
@@ -193,6 +193,13 @@ public abstract class Level implements LevelAccessor, AutoCloseable {
         return (CraftServer) Bukkit.getServer();
     }
 
+    // Paper start
+    @Override
+    public boolean hasChunk(int chunkX, int chunkZ) {
+        return ((ServerLevel) this).getChunkIfLoaded(chunkX, chunkZ) != null;
+    }
+    // Paper end
+
     public ResourceKey<DimensionType> getTypeKey() {
         return this.typeKey;
     }
@@ -1373,7 +1380,7 @@ public abstract class Level implements LevelAccessor, AutoCloseable {
 
         for (int l1 = j; l1 <= l; ++l1) {
             for (int i2 = k; i2 <= i1; ++i2) {
-                LevelChunk chunk = this.getChunkSource().getChunkNow(l1, i2);
+                LevelChunk chunk = (LevelChunk) this.getChunkIfLoadedImmediately(l1, i2); // Paper
 
                 if (chunk != null) {
                     for (int j2 = j1; j2 <= k1; ++j2) {