Added BlockSpread, BlockForm and BlockFade events.

src/main/java/net/minecraft/server/BlockMushroom.java

@@ -0,0 +1,60 @@
+package net.minecraft.server;
+
+import java.util.Random;
+
+// CraftBukkit start
+import org.bukkit.Location;
+import org.bukkit.Server;
+import org.bukkit.block.BlockState;
+import org.bukkit.craftbukkit.CraftWorld;
+import org.bukkit.event.block.BlockSpreadEvent;
+// CraftBukkit end
+
+public class BlockMushroom extends BlockFlower {
+
+    protected BlockMushroom(int i, int j) {
+        super(i, j);
+        float f = 0.2F;
+
+        this.a(0.5F - f, 0.0F, 0.5F - f, 0.5F + f, f * 2.0F, 0.5F + f);
+        this.a(true);
+    }
+
+    public void a(World world, int i, int j, int k, Random random) {
+        if (random.nextInt(100) == 0) {
+            int l = i + random.nextInt(3) - 1;
+            int i1 = j + random.nextInt(2) - random.nextInt(2);
+            int j1 = k + random.nextInt(3) - 1;
+
+            if (world.isEmpty(l, i1, j1) && this.f(world, l, i1, j1)) {
+                int k1 = i + (random.nextInt(3) - 1);
+
+                k1 = k + (random.nextInt(3) - 1);
+                if (world.isEmpty(l, i1, j1) && this.f(world, l, i1, j1)) {
+                    // CraftBukkit start
+                    Server server = world.getServer();
+                    CraftWorld craftworld = world.getWorld();
+                    BlockState blockState = craftworld.getBlockAt(l, i1, j1).getState();
+                    blockState.setTypeId(this.id);
+
+                    BlockSpreadEvent event = new BlockSpreadEvent(craftworld.getBlockAt(l, i1, j1), craftworld.getBlockAt(i, j, k), blockState);
+
+                    server.getPluginManager().callEvent(event);
+
+                    if (!event.isCancelled()) {
+                        blockState.update(true);
+                    }
+                    // CraftBukkit end
+                }
+            }
+        }
+    }
+
+    protected boolean c(int i) {
+        return Block.o[i];
+    }
+
+    public boolean f(World world, int i, int j, int k) {
+        return j >= 0 && j < 128 ? world.j(i, j, k) < 13 && this.c(world.getTypeId(i, j - 1, k)) : false;
+    }
+}