From 35743db29502ae20ea069937d69df3e213d8d1d0 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 55eaa89f6..8b5cfc78a 100644
--- a/src/main/java/net/minecraft/server/EntityPlayer.java
+++ b/src/main/java/net/minecraft/server/EntityPlayer.java
@@ -37,7 +37,7 @@ public class EntityPlayer extends EntityHuman implements ICrafting {
 
     private static final Logger cc = LogManager.getLogger();
     private static final IChatBaseComponent cd = (new ChatMessage("multiplayer.message_not_delivered", new Object[0])).a(EnumChatFormat.RED);
-    public String locale = "en_us"; // CraftBukkit - lowercase
+    public String locale = null; // CraftBukkit - lowercase // Paper - default to null
     public PlayerConnection playerConnection;
     public final MinecraftServer server;
     public final PlayerInteractManager playerInteractManager;
@@ -1228,12 +1228,19 @@ 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.b())) {
+        if (this.locale == null || !this.locale.equals(packetplayinsettings.b())) { // Paper - fix bug and check for null
             PlayerLocaleChangeEvent event = new PlayerLocaleChangeEvent(getBukkitEntity(), packetplayinsettings.b());
             this.server.server.getPluginManager().callEvent(event);
         }
         // CraftBukkit end
+        // 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.b();
+        if (!this.locale.equals(oldLocale)) {
+            new com.destroystokyo.paper.event.player.PlayerLocaleChangeEvent(this.getBukkitEntity(), oldLocale, this.locale).callEvent();
+        }
+        // Paper end
         this.ct = packetplayinsettings.d();
         this.cu = packetplayinsettings.e();
         this.getDataWatcher().set(EntityPlayer.bx, Byte.valueOf((byte) packetplayinsettings.f()));
diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
index 3871f3100..7d4355439 100644
--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
@@ -1683,8 +1683,10 @@ 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";
+        // Paper end
     }
 
     // Paper start
@@ -1766,7 +1768,7 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
         @Override
         public String getLocale()
         {
-           return getHandle().locale;
+            return CraftPlayer.this.getLocale(); // Paper
         }
 
         @Override
-- 
2.18.0