Paper/nms-patches/DispenseBehaviorTNT.patch

--- ../work/decompile-bb26c12b/net/minecraft/server/DispenseBehaviorTNT.java	2014-11-27 08:59:46.645422093 +1100
+++ src/main/java/net/minecraft/server/DispenseBehaviorTNT.java	2014-11-27 08:42:10.140850934 +1100
@@ -1,5 +1,10 @@
 package net.minecraft.server;
 
+// CraftBukkit start
+import org.bukkit.craftbukkit.inventory.CraftItemStack;
+import org.bukkit.event.block.BlockDispenseEvent;
+// CraftBukkit end
+
 final class DispenseBehaviorTNT extends DispenseBehaviorItem {
 
     DispenseBehaviorTNT() {}
@@ -7,11 +12,40 @@
     protected ItemStack b(ISourceBlock isourceblock, ItemStack itemstack) {
         World world = isourceblock.i();
         BlockPosition blockposition = isourceblock.getBlockPosition().shift(BlockDispenser.b(isourceblock.f()));
-        EntityTNTPrimed entitytntprimed = new EntityTNTPrimed(world, (double) blockposition.getX() + 0.5D, (double) blockposition.getY(), (double) blockposition.getZ() + 0.5D, (EntityLiving) null);
+        // EntityTNTPrimed entitytntprimed = new EntityTNTPrimed(world, (double) blockposition.getX() + 0.5D, (double) blockposition.getY(), (double) blockposition.getZ() + 0.5D, (EntityLiving) null);
+        
+        // CraftBukkit start
+        ItemStack itemstack1 = itemstack.a(1);
+        org.bukkit.block.Block block = world.getWorld().getBlockAt(isourceblock.getBlockPosition().getX(), isourceblock.getBlockPosition().getY(), isourceblock.getBlockPosition().getZ());
+        CraftItemStack craftItem = CraftItemStack.asCraftMirror(itemstack1);
+
+        BlockDispenseEvent event = new BlockDispenseEvent(block, craftItem.clone(), new org.bukkit.util.Vector(blockposition.getX() + 0.5, blockposition.getY() + 0.5, blockposition.getZ() + 0.5));
+        if (!BlockDispenser.eventFired) {
+            world.getServer().getPluginManager().callEvent(event);
+        }
+
+        if (event.isCancelled()) {
+            itemstack.count++;
+            return itemstack;
+        }
+
+        if (!event.getItem().equals(craftItem)) {
+            itemstack.count++;
+            // Chain to handler for new item
+            ItemStack eventStack = CraftItemStack.asNMSCopy(event.getItem());
+            IDispenseBehavior idispensebehavior = (IDispenseBehavior) BlockDispenser.M.get(eventStack.getItem());
+            if (idispensebehavior != IDispenseBehavior.a && idispensebehavior != this) {
+                idispensebehavior.a(isourceblock, eventStack);
+                return itemstack;
+            }
+        }
+
+        EntityTNTPrimed entitytntprimed = new EntityTNTPrimed(world, event.getVelocity().getX(), event.getVelocity().getY(), event.getVelocity().getZ(), (EntityLiving) null);
+        // CraftBukkit end
 
         world.addEntity(entitytntprimed);
         world.makeSound(entitytntprimed, "game.tnt.primed", 1.0F, 1.0F);
-        --itemstack.count;
+        // --itemstack.count; // CraftBukkit - handled above
         return itemstack;
     }
 }