Add Map filled event (#12574)

paper-api/src/main/java/io/papermc/paper/event/player/PlayerMapFilledEvent.java

@@ -0,0 +1,63 @@
+package io.papermc.paper.event.player;
+
+import org.bukkit.entity.Player;
+import org.bukkit.event.HandlerList;
+import org.bukkit.event.player.PlayerEvent;
+import org.bukkit.inventory.ItemStack;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+import org.jspecify.annotations.NullMarked;
+
+/**
+ * Called when a player creates a filled map by right-clicking an empty map.
+ */
+@NullMarked
+public class PlayerMapFilledEvent extends PlayerEvent {
+    private static final HandlerList HANDLER_LIST = new HandlerList();
+
+    private final ItemStack originalItem;
+    private ItemStack createdMap;
+
+    @ApiStatus.Internal
+    public PlayerMapFilledEvent(final Player player, final ItemStack originalItem, final ItemStack createdMap) {
+        super(player);
+        this.originalItem = originalItem;
+        this.createdMap = createdMap;
+    }
+
+    /**
+     * Returns a copy of the empty map before it was consumed.
+     *
+     * @return cloned original item
+     */
+    public ItemStack getOriginalItem() {
+        return this.originalItem.clone();
+    }
+
+    /**
+     * Returns a copy of the filled map which was created.
+     *
+     * @return cloned created map item
+     */
+    public ItemStack getCreatedMap() {
+        return this.createdMap.clone();
+    }
+
+    /**
+     * Sets the filled map that will be created.
+     *
+     * @param createdMap map item
+     */
+    public void setCreatedMap(final ItemStack createdMap) {
+        this.createdMap = createdMap.clone();
+    }
+
+    @Override
+    public HandlerList getHandlers() {
+        return HANDLER_LIST;
+    }
+
+    public static HandlerList getHandlerList() {
+        return HANDLER_LIST;
+    }
+}

paper-server/patches/sources/net/minecraft/world/item/EmptyMapItem.java.patch

@@ -0,0 +1,19 @@
+--- a/net/minecraft/world/item/EmptyMapItem.java
++++ b/net/minecraft/world/item/EmptyMapItem.java
+@@ -17,10 +_,16 @@
+     public InteractionResult use(Level level, Player player, InteractionHand hand) {
+         ItemStack itemInHand = player.getItemInHand(hand);
+         if (level instanceof ServerLevel serverLevel) {
++            org.bukkit.inventory.ItemStack emptyMap = itemInHand.asBukkitCopy(); // Paper - PlayerMapFilledEvent
+             itemInHand.consume(1, player);
+             player.awardStat(Stats.ITEM_USED.get(this));
+             serverLevel.playSound(null, player, SoundEvents.UI_CARTOGRAPHY_TABLE_TAKE_RESULT, player.getSoundSource(), 1.0F, 1.0F);
+             ItemStack itemStack = MapItem.create(serverLevel, player.getBlockX(), player.getBlockZ(), (byte)0, true, false);
++            // Paper start - PlayerMapFilledEvent
++            io.papermc.paper.event.player.PlayerMapFilledEvent event = new io.papermc.paper.event.player.PlayerMapFilledEvent((org.bukkit.entity.Player) player.getBukkitEntity(), emptyMap, org.bukkit.craftbukkit.inventory.CraftItemStack.asCraftMirror(itemStack));
++            event.callEvent();
++            itemStack = org.bukkit.craftbukkit.inventory.CraftItemStack.unwrap(event.getCreatedMap());
++            // Paper end - PlayerMapFilledEvent
+             if (itemInHand.isEmpty()) {
+                 return InteractionResult.SUCCESS.heldItemTransformedTo(itemStack);
+             } else {