From 7a24ce7d8f3ba567dce14ceb16616072eea69978 Mon Sep 17 00:00:00 2001
From: Byteflux <byte@byteflux.net>
Date: Sun, 3 Aug 2014 21:20:42 -0500
Subject: [PATCH] Configurable speed for water flowing over lava

Basic info: http://hastebin.com/axuzaralas.vhdl

diff --git a/src/main/java/net/minecraft/server/BlockFlowing.java b/src/main/java/net/minecraft/server/BlockFlowing.java
index cdce3ff13..640939175 100644
--- a/src/main/java/net/minecraft/server/BlockFlowing.java
+++ b/src/main/java/net/minecraft/server/BlockFlowing.java
@@ -38,7 +38,7 @@ public class BlockFlowing extends BlockFluids {
         }
 
         boolean flag = true;
-        int i1 = this.a(world);
+        int i1 = this.getFlowSpeed(world, i, j, k); // PaperSpigot
         int j1;
 
         if (l > 0) {
@@ -289,11 +289,25 @@ public class BlockFlowing extends BlockFluids {
     public void onPlace(World world, int i, int j, int k) {
         super.onPlace(world, i, j, k);
         if (world.getType(i, j, k) == this) {
-            world.a(i, j, k, this, this.a(world));
+            world.a(i, j, k, this, this.getFlowSpeed(world, i, j, k)); // PaperSpigot
         }
     }
 
     public boolean L() {
         return true;
     }
+
+    /**
+     * PaperSpigot - Get flow speed. Throttle if its water and flowing adjacent to lava
+     */
+    public int getFlowSpeed(World world, int x, int y, int z) {
+        if (this.getMaterial() == Material.WATER && (
+                world.getType(x, y, z - 1).getMaterial() == Material.LAVA ||
+                world.getType(x, y, z + 1).getMaterial() == Material.LAVA ||
+                world.getType(x - 1, y, z).getMaterial() == Material.LAVA ||
+                world.getType(x + 1, y, z).getMaterial() == Material.LAVA)) {
+            return world.paperSpigotConfig.waterOverLavaFlowSpeed;
+        }
+        return super.a(world);
+    }
 }
diff --git a/src/main/java/org/github/paperspigot/PaperSpigotWorldConfig.java b/src/main/java/org/github/paperspigot/PaperSpigotWorldConfig.java
index 708318dd1..ce3fb7386 100644
--- a/src/main/java/org/github/paperspigot/PaperSpigotWorldConfig.java
+++ b/src/main/java/org/github/paperspigot/PaperSpigotWorldConfig.java
@@ -164,4 +164,11 @@ public class PaperSpigotWorldConfig
             log( "TNT/Falling Block Height Limit set to Y: " + fallingBlockHeightNerf);
         }
     }
+
+    public int waterOverLavaFlowSpeed;
+    private void waterOverLavaFlowSpeed()
+    {
+        waterOverLavaFlowSpeed = getInt( "water-over-lava-flow-speed", 5 );
+        log( "Water over lava flow speed: " + waterOverLavaFlowSpeed);
+    }
 }
-- 
2.13.3