307 lines
11 KiB
Java
307 lines
11 KiB
Java
package de.pepich.chestapi;
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import java.util.HashMap;
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import javax.annotation.Nullable;
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import org.bukkit.Bukkit;
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import org.bukkit.entity.Player;
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import org.bukkit.event.EventHandler;
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import org.bukkit.event.Listener;
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import org.bukkit.event.inventory.ClickType;
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import org.bukkit.event.inventory.InventoryClickEvent;
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import org.bukkit.event.inventory.InventoryCloseEvent;
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import org.bukkit.event.inventory.InventoryType;
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import org.bukkit.inventory.Inventory;
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import org.bukkit.inventory.InventoryHolder;
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import org.bukkit.inventory.ItemStack;
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public class ClickableInventory implements Listener
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{
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private int open = 0;
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private final String title;
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private DefaultSize size;
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private HashMap<Integer, CallbackHandler> handlers = new HashMap<Integer, CallbackHandler>();
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private CallbackHandler background;
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private CallbackHandler fallback;
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private CallbackHandler close;
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private Inventory inventory;
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private final InventoryHolder holder;
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/** Creates a new ClickableInventory with the given name.</br>
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* The ClickableInventory will be created with a DefaultSize as specified by {@link DefaultSize#DYNAMIC_AUTO(int, int) DYNAMIC_AUTO(9, 54)}.
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*
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* @param name The name to be displayed. */
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public ClickableInventory(final String title)
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{
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this(title, DefaultSize.DYNAMIC_AUTO(9, 54));
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}
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/** Creates a new ClickableInventory with the given name and the specified DefaultSize.
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*
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* @param name The name to be displayed.
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* @param size The DefaultSize for the inventory to be used. */
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public ClickableInventory(final String title, final DefaultSize size)
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{
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this.size = size;
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this.title = title;
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holder = new CustomHolder(this);
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if (size.allowSquareShape() && size.getPreferredSize() == 9)
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inventory = Bukkit.createInventory(holder, InventoryType.DROPPER, title);
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else
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inventory = Bukkit.createInventory(holder, size.getPreferredSize(), title);
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}
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/** Displays the inventory.
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*
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* @param player The player that is going to see the inventory. */
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public void show(Player player)
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{
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player.openInventory(inventory);
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if (open == 0)
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Bukkit.getPluginManager().registerEvents(this, ChestAPI.getPlugin());
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open++;
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}
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// ------------------------------------------------------------- //
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// -------------------- GETTERS AND SETTERS -------------------- //
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// ------------------------------------------------------------- //
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// If you want docs on these, go fork off. Getters/Setters. Duh. //
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public String getName()
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{
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return title;
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}
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public int getFirstFree()
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{
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if (handlers.size() == inventory.getSize())
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return -1;
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for (int i = 1; i <= inventory.getSize(); i++)
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if (!handlers.containsKey(i))
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return i;
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return -1;
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}
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public int getLastFree()
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{
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if (handlers.size() == inventory.getSize())
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return -1;
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for (int i = inventory.getSize(); i > 0; i--)
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if (!handlers.containsKey(i))
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return i;
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return -1;
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}
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public int getFirstUsed()
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{
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if (handlers.size() == inventory.getSize())
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return -1;
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for (int i = 1; i <= inventory.getSize(); i++)
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if (handlers.containsKey(i))
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return i;
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return -1;
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}
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public int getLastUsed()
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{
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if (handlers.size() == inventory.getSize())
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return -1;
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for (int i = inventory.getSize(); i > 0; i--)
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if (handlers.containsKey(i))
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return i;
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return -1;
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}
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protected Inventory getInventory()
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{
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return inventory;
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}
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// ------------------------------------------------------------- //
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// ----------------------- SETUP METHODS ----------------------- //
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// ------------------------------------------------------------- //
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/** Assigns an item and a handler to the given item slot.<br/>
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* Setting a handler to null will NOT remove it, but it will flag the slot as "used", meaning that it will be skipped when searching for the first/last free spot.
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*
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* @param slot An integer value representing the slot for the ItemStack. Must be any of -998, [-3:max_length].<br/>
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* The value -998 represents background clicks.<br/>
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* The value -3 represents the "close handler", which will be fired when the player closes the inventory.<br/>
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* The value -2 represents the "fallback handler", which will be used if no appropriate handler could be found.<br/>
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* The value -1 represents the last free slot, 0 points to the first free slot. If an actual number is given, the specified slot will be overwritten.<br/>
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* The first slot is numbered with 1, as opposed to starting at 0, due to the additional meaning that 0 has.
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* @param item An ItemStack that will be displayed. Set to null if you want to assign functionality to an empty slot.
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* @param handler A CallbackHandler which will be notified on click. When the handler is null then the handler will be removed, but the item will still be assigned.
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* @throws IllegalArgumentException when the location does not exist or when one of -1 or 0 are specified and the inventory is already full. */
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public void set(int slot, @Nullable final ItemStack item, @Nullable final CallbackHandler handler)
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{
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if (slot > inventory.getSize())
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resize(slot);
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if (slot < -1 || slot > size.getMaxSize())
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throw new IllegalArgumentException(
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"The given slot (" + slot + ") is out of bounds (-1, 0, [1:" + size.getMaxSize() + "])");
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else
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{
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if (slot == -998)
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background = handler;
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else if (slot == -2)
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fallback = handler;
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else if (slot == -3)
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close = handler;
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else
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{
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if (slot == 0)
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slot = getFirstFree();
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else if (slot == -1)
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slot = getLastFree();
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if (slot == -1)
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throw new IllegalArgumentException("No free spot could be found!");
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if (item == null)
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inventory.remove(inventory.getItem(slot - 1));
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else
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inventory.setItem(slot - 1, item);
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handlers.put(slot, handler);
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}
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}
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if (size.doAutoResize())
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resize();
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}
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/** Removes an assigned action from the inventory. Most be any of -1, 0, [1:max_length].<br/>
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* Calling this method will free up a slot again so that it can be filled up by using the "first/last free" selector.
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*
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* @param slot An integer value representing the slot for the ItemStack. Must be any of -998, [-3:max_length].<br/>
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* The value -998 represents background clicks.<br/>
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* The value -3 represents the "close handler", which will be fired when the player closes the inventory.<br/>
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* The value -2 represents the "fallback handler", which will be used if no appropriate handler could be found.<br/>
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* The value -1 represents the last used slot, 0 points to the first used slot. If an actual number is given, the specified slot will be overwritten.<br/>
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* The first slot is numbered with 1, as opposed to starting at 0, due to the additional meaning that 0 has.
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* @throws IllegalArgumentException when the location does not exist. */
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public void remove(int slot)
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{
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if (slot == -998)
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background = null;
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else if (slot == -2)
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fallback = null;
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else if (slot == -3)
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close = null;
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else
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{
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if (slot < -1 || slot > size.getMaxSize())
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throw new IllegalArgumentException(
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"The given slot (" + slot + ") is out of bounds (-1, 0, [1:" + size.getMaxSize() + "])");
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if (slot == 0)
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slot = getFirstUsed();
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else if (slot == -1)
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slot = getLastUsed();
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if (slot == -1)
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throw new IllegalArgumentException("No free spot could be found!");
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handlers.remove(slot);
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inventory.setItem(slot - 1, null);
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if (size.doAutoResize())
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resize();
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}
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}
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/** This method removes all TRAILING empty lines.<br/>
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* This method will utilize hopper and dropper inventories if possible. Dropper inventories can be disabled by selection a RECTANGLE size constraint.<br/>
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* Can not be used on final sized inventories.
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*
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* @return the new size.
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* @throws IllegalAccessError if the Inventories size is final. */
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public int resize()
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{
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if (size.isFinalSize())
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throw new IllegalAccessError("Can not resize an inventory with a FINAL size constraint.");
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final int target_size = getLastUsed();
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Inventory new_inventory;
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if (target_size <= 5)
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new_inventory = Bukkit.createInventory(holder, InventoryType.HOPPER, title);
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else if (target_size <= 9 && size.allowSquareShape())
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new_inventory = Bukkit.createInventory(holder, InventoryType.DROPPER, title);
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else
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new_inventory = Bukkit.createInventory(holder, target_size + ((9 - (target_size % 9)) % 9), title);
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for (int i = 0; i < new_inventory.getSize() && i < inventory.getSize(); i++)
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new_inventory.setItem(i, inventory.getItem(i));
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inventory = new_inventory;
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return inventory.getSize();
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}
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/** This method removes all TRAILING empty lines.<br/>
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* This method will utilize hopper and dropper inventories if possible. Dropper inventories can be disabled by selection a RECTANGLE size constraint.<br/>
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* Can not be used on final sized inventories.
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*
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* @return the new size.
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* @throws IllegalAccessError if the Inventories size is final. */
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private void resize(int target_size)
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{
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if (size.isFinalSize())
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throw new IllegalAccessError("Can not resize an inventory with a FINAL size constraint.");
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target_size = Math.max(target_size, getLastUsed());
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Inventory new_inventory;
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if (target_size <= 5)
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new_inventory = Bukkit.createInventory(holder, InventoryType.HOPPER, title);
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else if (target_size <= 9 && size.allowSquareShape())
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new_inventory = Bukkit.createInventory(holder, InventoryType.DROPPER, title);
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else
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new_inventory = Bukkit.createInventory(holder, target_size + ((9 - (target_size % 9)) % 9), title);
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for (int i = 0; i < new_inventory.getSize() && i < inventory.getSize(); i++)
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new_inventory.setItem(i, inventory.getItem(i));
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inventory = new_inventory;
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}
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// ------------------------------------------------------------- //
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// ------------------------- LISTENERS ------------------------- //
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// ------------------------------------------------------------- //
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@EventHandler
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public void onInventoryClose(InventoryCloseEvent event)
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{
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if (this.inventory.equals(event.getInventory()))
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{
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open--;
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if (open == 0)
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event.getHandlers().unregister(this);
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if (close != null)
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close.run((Player) event.getPlayer(), ClickType.UNKNOWN);
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}
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}
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@EventHandler
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public void onInventoryClick(InventoryClickEvent event)
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{
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if (this.inventory.equals(event.getInventory()))
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{
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event.setCancelled(true);
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final int slot = event.getSlot() + 1;
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CallbackHandler handler;
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if (slot == -998)
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handler = background;
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else
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handler = handlers.get(slot);
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if ((handler = (handler == null ? fallback : handler)) != null)
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handler.run((Player) event.getWhoClicked(), event.getClick());
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}
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}
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}
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class CustomHolder implements InventoryHolder
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{
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ClickableInventory inv;
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protected CustomHolder(ClickableInventory inv)
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{
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this.inv = inv;
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}
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@Override
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public Inventory getInventory()
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{
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return inv.getInventory();
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}
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}
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