PaperMC/nms-patches/BlockRedstoneTorch.patch

--- ../work/decompile-bb26c12b/net/minecraft/server/BlockRedstoneTorch.java	2014-11-27 08:59:46.565422446 +1100
+++ src/main/java/net/minecraft/server/BlockRedstoneTorch.java	2014-11-27 08:42:10.156850903 +1100
@@ -6,6 +6,8 @@
 import java.util.Map;
 import java.util.Random;
 
+import org.bukkit.event.block.BlockRedstoneEvent; // CraftBukkit
+
 public class BlockRedstoneTorch extends BlockTorch {
 
     private static Map b = Maps.newHashMap();
@@ -95,9 +97,26 @@
         while (list != null && !list.isEmpty() && world.getTime() - ((RedstoneUpdateInfo) list.get(0)).b > 60L) {
             list.remove(0);
         }
+ 
+        // CraftBukkit start
+        org.bukkit.plugin.PluginManager manager = world.getServer().getPluginManager();
+        org.bukkit.block.Block block = world.getWorld().getBlockAt(blockposition.getX(), blockposition.getY(), blockposition.getZ());
+        int oldCurrent = this.isOn ? 15 : 0;
+
+        BlockRedstoneEvent event = new BlockRedstoneEvent(block, oldCurrent, oldCurrent);
+        // CraftBukkit end
 
         if (this.isOn) {
             if (flag) {
+                // CraftBukkit start
+                if (oldCurrent != 0) {
+                    event.setNewCurrent(0);
+                    manager.callEvent(event);
+                    if (event.getNewCurrent() != 0) {
+                        return;
+                    }
+                }
+                // CraftBukkit end
                 world.setTypeAndData(blockposition, Blocks.UNLIT_REDSTONE_TORCH.getBlockData().set(BlockRedstoneTorch.FACING, iblockdata.get(BlockRedstoneTorch.FACING)), 3);
                 if (this.a(world, blockposition, true)) {
                     world.makeSound((double) ((float) blockposition.getX() + 0.5F), (double) ((float) blockposition.getY() + 0.5F), (double) ((float) blockposition.getZ() + 0.5F), "random.fizz", 0.5F, 2.6F + (world.random.nextFloat() - world.random.nextFloat()) * 0.8F);
@@ -114,6 +133,16 @@
                 }
             }
         } else if (!flag && !this.a(world, blockposition, false)) {
+            // CraftBukkit start
+            if (oldCurrent != 15) {
+                event.setNewCurrent(15);
+                manager.callEvent(event);
+                if (event.getNewCurrent() != 15) {
+                    return;
+                }
+            }
+            // CraftBukkit end
+
             world.setTypeAndData(blockposition, Blocks.REDSTONE_TORCH.getBlockData().set(BlockRedstoneTorch.FACING, iblockdata.get(BlockRedstoneTorch.FACING)), 3);
         }