From ddf7fe9b14aa6ad4a511f9f9ae8071d52d5723e8 Mon Sep 17 00:00:00 2001
From: Isaac Moore <rmsy@me.com>
Date: Tue, 19 Apr 2016 14:09:31 -0500
Subject: [PATCH] Implement PlayerLocaleChangeEvent


diff --git a/src/main/java/net/minecraft/server/EntityPlayer.java b/src/main/java/net/minecraft/server/EntityPlayer.java
index 6fdde5c07..33f34ed0e 100644
--- a/src/main/java/net/minecraft/server/EntityPlayer.java
+++ b/src/main/java/net/minecraft/server/EntityPlayer.java
@@ -32,7 +32,7 @@ import org.bukkit.inventory.MainHand;
 public class EntityPlayer extends EntityHuman implements ICrafting {
 
     private static final Logger bV = LogManager.getLogger();
-    public String locale = "en_us"; // PAIL: private -> public
+    public String locale = null; // PAIL: private -> public // Paper - default to null
     public PlayerConnection playerConnection;
     public final MinecraftServer server;
     public final PlayerInteractManager playerInteractManager;
@@ -1224,12 +1224,24 @@ public class EntityPlayer extends EntityHuman implements ICrafting {
             PlayerChangedMainHandEvent event = new PlayerChangedMainHandEvent(getBukkitEntity(), getMainHand() == EnumMainHand.LEFT ? MainHand.LEFT : MainHand.RIGHT);
             this.server.server.getPluginManager().callEvent(event);
         }
-        if (!this.locale.equals(packetplayinsettings.a())) {
+
+        // Paper start - add PlayerLocaleChangeEvent
+        // Since the field is initialized to null, this event should always fire the first time the packet is received
+        String oldLocale = this.locale;
+        this.locale = packetplayinsettings.a();
+        if (!this.locale.equals(oldLocale)) {
+            new com.destroystokyo.paper.event.player.PlayerLocaleChangeEvent(this.getBukkitEntity(), oldLocale, this.locale).callEvent();
+        }
+
+        // Compat with Bukkit
+        oldLocale = oldLocale != null ? oldLocale : "en_us";
+        // Paper end
+
+        if (!oldLocale.equals(packetplayinsettings.a())) {
             PlayerLocaleChangeEvent event = new PlayerLocaleChangeEvent(getBukkitEntity(), packetplayinsettings.a());
             this.server.server.getPluginManager().callEvent(event);
         }
         // CraftBukkit end
-        this.locale = packetplayinsettings.a();
         this.cl = packetplayinsettings.c();
         this.cm = packetplayinsettings.d();
         this.getDataWatcher().set(EntityPlayer.br, Byte.valueOf((byte) packetplayinsettings.e()));
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
index 71034f945..171e0f7bb 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
@@ -1693,7 +1693,9 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
         @Override
         public String getLocale()
         {
-           return getHandle().locale;
+            // Paper start - Locale change event
+            final String locale = getHandle().locale;
+            return locale != null ? locale : "en_us";
         }
 
         @Override
-- 
2.13.0.windows.1