SPIGOT-4376: Add draft BlockDropItemEvent

By: AndaBlock <anda.block12345@outlook.de>

paper-api/src/main/java/org/bukkit/event/block/BlockDropItemEvent.java

@@ -0,0 +1,94 @@
+package org.bukkit.event.block;
+
+import org.bukkit.Warning;
+import org.bukkit.block.Block;
+import org.bukkit.block.BlockState;
+import org.bukkit.entity.Item;
+import org.bukkit.entity.Player;
+import org.bukkit.event.Cancellable;
+import org.bukkit.event.HandlerList;
+
+/**
+ * Called if a block broken by a player drops an item.
+ *
+ * If the block break is cancelled, this event won't be called.
+ *
+ * If isDropItems in BlockBreakEvent is set to false, this event won't be
+ * called.
+ *
+ * This event will also be called if the player breaks a multi block structure,
+ * for example a torch on top of a stone. Both items will have an event call.
+ *
+ * The Block is already broken as this event is called, so #getBlock() will be
+ * AIR in most cases. Use #getBlockData() for more Information about the broken
+ * block.
+ *
+ * <b>Note this event may not currently fire for some drops associated with tile
+ * entities</b>
+ *
+ * @deprecated draft API
+ */
+@Deprecated
+@Warning(false)
+public class BlockDropItemEvent extends BlockEvent implements Cancellable {
+
+    private static final HandlerList handlers = new HandlerList();
+    private final Player player;
+    private boolean cancel;
+    private final BlockState blockState;
+    private final Item item;
+
+    public BlockDropItemEvent(Block block, BlockState blockState, Player player, Item item) {
+        super(block);
+        this.blockState = blockState;
+        this.player = player;
+        this.item = item;
+    }
+
+    /**
+     * Gets the Player that is breaking the block involved in this event.
+     *
+     * @return The Player that is breaking the block involved in this event
+     */
+    public Player getPlayer() {
+        return player;
+    }
+
+    /**
+     * Gets the BlockState of the block involved in this event before it was
+     * broken.
+     *
+     * @return The BlockState of the block involved in this event
+     */
+    public BlockState getBlockState() {
+        return blockState;
+    }
+
+    /**
+     * Gets the Item drop caused by the block break.
+     *
+     * @return The Item the block caused to drop
+     */
+    public Item getItem() {
+        return item;
+    }
+
+    @Override
+    public boolean isCancelled() {
+        return cancel;
+    }
+
+    @Override
+    public void setCancelled(boolean cancel) {
+        this.cancel = cancel;
+    }
+
+    @Override
+    public HandlerList getHandlers() {
+        return handlers;
+    }
+
+    public static HandlerList getHandlerList() {
+        return handlers;
+    }
+}