SPIGOT-4765: WeatherChangeEvent occurs every tick

nms-patches/WorldData.patch

@@ -28,11 +28,15 @@
      }
  
      public long getSeed() {
-@@ -508,6 +515,16 @@
+@@ -508,6 +515,20 @@
      }
  
      public void setThundering(boolean flag) {
 +        // CraftBukkit start
++        if (this.z == flag) {
++            return;
++        }
++
 +        org.bukkit.World world = Bukkit.getWorld(getName());
 +        if (world != null) {
 +            ThunderChangeEvent thunder = new ThunderChangeEvent(world, flag);
@@ -45,11 +49,15 @@
          this.z = flag;
      }
  
-@@ -524,6 +541,16 @@
+@@ -524,6 +545,20 @@
      }
  
      public void setStorm(boolean flag) {
 +        // CraftBukkit start
++        if (this.x == flag) {
++            return;
++        }
++
 +        org.bukkit.World world = Bukkit.getWorld(getName());
 +        if (world != null) {
 +            WeatherChangeEvent weather = new WeatherChangeEvent(world, flag);
@@ -62,7 +70,7 @@
          this.x = flag;
      }
  
-@@ -673,6 +700,12 @@
+@@ -673,6 +708,12 @@
  
      public void setDifficulty(EnumDifficulty enumdifficulty) {
          this.G = enumdifficulty;
@@ -75,7 +83,7 @@
      }
  
      public boolean isDifficultyLocked() {
-@@ -777,4 +810,12 @@
+@@ -777,4 +818,12 @@
      public void a(UUID uuid) {
          this.X = uuid;
      }