From 41cc62d3657a36b4cdb7316506531d78d6db17a5 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 615a6af..6517c32 100644
--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
@@ -290,4 +290,10 @@ 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 a87a9da..3809aaa 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -352,8 +352,11 @@ public abstract class MinecraftServer implements Runnable, ICommandListener, IAs
             long j = aw();
             i = 0;
 
-            for (int k = -192; k <= 192 && this.isRunning(); k += 16) {
-                for (int l = -192; l <= 192 && this.isRunning(); l += 16) {
+            // Paper start
+            short radius = worldserver.paperConfig.keepLoadedRange;
+            for (int k = -radius; k <= radius && this.isRunning(); k += 16) {
+                for (int l = -radius; l <= radius && this.isRunning(); l += 16) {
+            // Paper end
                     long i1 = aw();
 
                     if (i1 - j > 1000L) {
diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
index 2d5f3d2..9c36471 100644
--- a/src/main/java/net/minecraft/server/World.java
+++ b/src/main/java/net/minecraft/server/World.java
@@ -3191,8 +3191,9 @@ public abstract class World implements IBlockAccess {
         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 b39007f..d5b1adf 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
@@ -951,7 +951,7 @@ public final class CraftServer implements Server {
         System.out.print("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 53fbd38..73aee9b 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftWorld.java
@@ -1264,8 +1264,9 @@ 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 {
-- 
2.9.3