From c0013f59652a0a64e836a922863092944b8ef36f Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Sat, 13 Sep 2014 23:14:43 -0400
Subject: [PATCH] Configurable Keep Spawn Loaded range per world

This lets you disable it for some worlds and lower it for others.

diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
index eb09be512..6ac58e5ec 100644
--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
@@ -232,4 +232,10 @@ public class PaperWorldConfig {
         grassUpdateRate = Math.max(0, getInt("grass-spread-tick-rate", grassUpdateRate));
         log("Grass Spread Tick Rate: " + grassUpdateRate);
     }
+
+    public short keepLoadedRange;
+    private void keepLoadedRange() {
+        keepLoadedRange = (short) (getInt("keep-spawn-loaded-range", Math.min(spigotConfig.viewDistance, 8)) * 16);
+        log( "Keep Spawn Loaded Range: " + (keepLoadedRange/16));
+    }
 }
diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index 1027b0588..b7aa9e869 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -446,8 +446,11 @@ public abstract class MinecraftServer implements IAsyncTaskHandler, IMojangStati
             ArrayList arraylist = Lists.newArrayList();
             Set set = Sets.newConcurrentHashSet();
 
-            for (int i = -192; i <= 192 && this.isRunning(); i += 16) {
-                for (int j = -192; j <= 192 && this.isRunning(); j += 16) {
+            // Paper start
+            short radius = worldserver.paperConfig.keepLoadedRange;
+            for (int i = -radius; i <= radius && this.isRunning(); i += 16) {
+                for (int j = -radius; j <= radius && this.isRunning(); j += 16) {
+                    // Paper end
                     arraylist.add(new ChunkCoordIntPair(blockposition.getX() + i >> 4, blockposition.getZ() + j >> 4));
                 }
 
diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
index e42a334bc..d15afd595 100644
--- a/src/main/java/net/minecraft/server/World.java
+++ b/src/main/java/net/minecraft/server/World.java
@@ -2821,8 +2821,9 @@ public abstract class World implements GeneratorAccess, IIBlockAccess, AutoClose
         int k = i * 16 + 8 - blockposition.getX();
         int l = j * 16 + 8 - blockposition.getZ();
         boolean flag = true;
+        short keepLoadedRange = paperConfig.keepLoadedRange; // Paper
 
-        return k >= -128 && k <= 128 && l >= -128 && l <= 128 && this.keepSpawnInMemory; // CraftBukkit - Added 'this.keepSpawnInMemory'
+        return k >= -keepLoadedRange && k <= keepLoadedRange && l >= -keepLoadedRange && l <= keepLoadedRange && this.keepSpawnInMemory; // CraftBukkit - Added 'this.keepSpawnInMemory' // Paper - Re-add range var
     }
 
     public void a(Packet<?> packet) {
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
index f98f355dd..2bcd1c3ca 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
@@ -1007,7 +1007,7 @@ public final class CraftServer implements Server {
         System.out.println("Preparing start region for level " + (console.worlds.size() - 1) + " (Seed: " + internal.getSeed() + ")");
 
         if (internal.getWorld().getKeepSpawnInMemory()) {
-            short short1 = 196;
+            short short1 = internal.paperConfig.keepLoadedRange; // Paper
             long i = System.currentTimeMillis();
             for (int j = -short1; j <= short1; j += 16) {
                 for (int k = -short1; k <= short1; k += 16) {
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
index 4df849eef..9d88b9ddb 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
@@ -1305,8 +1305,9 @@ public class CraftWorld implements World {
         int chunkCoordX = chunkcoordinates.getX() >> 4;
         int chunkCoordZ = chunkcoordinates.getZ() >> 4;
         // Cycle through the 25x25 Chunks around it to load/unload the chunks.
-        for (int x = -12; x <= 12; x++) {
-            for (int z = -12; z <= 12; z++) {
+        int radius = world.paperConfig.keepLoadedRange / 16; // Paper
+        for (int x = -radius; x <= radius; x++) { // Paper
+            for (int z = -radius; z <= radius; z++) { // Paper
                 if (keepLoaded) {
                     loadChunk(chunkCoordX + x, chunkCoordZ + z);
                 } else {
-- 
2.18.0