From eb0b830ce23ab89758193eb1c2a9e1ae9ac00df2 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 cdce3ff..6409391 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 5e72313..dccb780 100644
--- a/src/main/java/org/github/paperspigot/PaperSpigotWorldConfig.java
+++ b/src/main/java/org/github/paperspigot/PaperSpigotWorldConfig.java
@@ -176,4 +176,11 @@ public class PaperSpigotWorldConfig
         // Technically a little disingenuous as it applies to all falling blocks but alas, backwards compat prevails!
         fallingBlockHeightNerf = getDouble( "tnt-entity-height-nerf", 0 );
     }
+
+    public int waterOverLavaFlowSpeed;
+    private void waterOverLavaFlowSpeed()
+    {
+        waterOverLavaFlowSpeed = getInt( "water-over-lava-flow-speed", 5 );
+        log( "Water over lava flow speed: " + waterOverLavaFlowSpeed);
+    }
 }
-- 
1.9.1