FastInv

Lightweight and easy-to-use inventory API for Bukkit plugins.

Features

• Lightweight (less than 400 lines of code with the JavaDoc) and no dependencies
• Compatible with all Minecraft versions starting with 1.7.10
• Adventure components support
• Supports custom inventories (size, title and type)
• Easy to use
• Option to prevent a player from closing the inventory
• The Bukkit inventory can still be directly used

Installation

Maven

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-shade-plugin</artifactId>
            <version>3.3.0</version>
            <executions>
                <execution>
                    <phase>package</phase>
                    <goals>
                        <goal>shade</goal>
                    </goals>
                </execution>
            </executions>
            <configuration>
                <relocations>
                    <relocation>
                        <pattern>fr.mrmicky.fastinv</pattern>
                        <!-- Replace 'com.yourpackae' with the package of your plugin ! -->
                        <shadedPattern>com.yourpackage.fastinv</shadedPattern>
                    </relocation>
                </relocations>
            </configuration>
        </plugin>
    </plugins>
</build>

<repositories>
    <repository>
        <id>jitpack.io</id>
        <url>https://jitpack.io</url>
    </repository>
</repositories>

<dependencies>
    <dependency>
        <groupId>fr.mrmicky</groupId>
        <artifactId>FastInv</artifactId>
        <version>3.1.0</version>
    </dependency>
</dependencies>

Gradle

plugins {
    id 'com.gradleup.shadow' version '8.3.0'
}

repositories {
    maven { url 'https://jitpack.io' }
}

dependencies {
    implementation 'fr.mrmicky:FastInv:3.1.0'
}

shadowJar {
    // Replace 'com.yourpackage' with the package of your plugin 
    relocate 'fr.mrmicky.fastinv', 'com.yourpackage.fastinv'
}

Manual

Simply copy FastInv.java and FastInvManager.java in your plugin. You can also add ItemBuilder.java if you need.

Usage

Register FastInv

Before creating inventories, you just need to register your plugin by adding FastInvManager.register(this); in the onEnable() method of your plugin:

@Override
public void onEnable() {
    FastInvManager.register(this);
}

Creating an inventory class

Now you can create an inventory by creating a class that extends FastInv, and adding items in the constructor. You can also override onClick, onClose and onOpen if you need.

Basic example inventory:

package fr.mrmicky.fastinv.test;

import fr.mrmicky.fastinv.FastInv;
import fr.mrmicky.fastinv.ItemBuilder;
import org.bukkit.ChatColor;
import org.bukkit.Material;
import org.bukkit.event.inventory.InventoryClickEvent;
import org.bukkit.event.inventory.InventoryCloseEvent;
import org.bukkit.event.inventory.InventoryOpenEvent;
import org.bukkit.inventory.ItemStack;

public class ExampleInventory extends FastInv {

    private boolean preventClose = false;

    public ExampleInventory() {
        super(45, ChatColor.GOLD + "Example inventory");

        // Just add a random item
        setItem(22, new ItemStack(Material.IRON_SWORD), e -> e.getWhoClicked().sendMessage("You clicked on the sword"));

        // Add some blocks to the borders
        setItems(getBorders(), new ItemBuilder(Material.LAPIS_BLOCK).name(" ").build());

        // Add a simple item to prevent closing the inventory
        setItem(34, new ItemBuilder(Material.BARRIER).name(ChatColor.RED + "Prevent close").build(), e -> {
            this.preventClose = !this.preventClose;
        });

        // Prevent from closing when preventClose is to true
        setCloseFilter(p -> this.preventClose);
    }

    @Override
    public void onOpen(InventoryOpenEvent event) {
        event.getPlayer().sendMessage(ChatColor.GOLD + "You opened the inventory");
    }

    @Override
    public void onClose(InventoryCloseEvent event) {
        event.getPlayer().sendMessage(ChatColor.GOLD + "You closed the inventory");
    }

    @Override
    public void onClick(InventoryClickEvent event) {
        // do something
    }
}

The inventory can be opened with the open(player) method:

new ExampleInventory().open(player);

Paginated inventory

FastInv also supports paginated inventories, which can be created by using PaginatedFastInv instead of FastInv.

Content can be added to the inventory using addContent or setContent, and pagination items can be added with previousPageItem and nextPageItem.

You can also use onPageChange to execute code when the page changes, and the #currentPage(), #lastPage(), #isFirstPage() and #isLastPage() methods to get information about the current page.

import org.bukkit.Material;
import org.bukkit.inventory.ItemStack;

public class ExamplePaginatedInventory extends PaginatedFastInv {

    private static final InventoryScheme SCHEME = new InventoryScheme()
            .mask(" 1111111 ")
            .mask(" 1111111 ")
            .bindPagination('1');

    public ExamplePaginatedInventory() {
        super(27, "Example paginated inventory");

        // Add pagination items to the inventory
        // These items are automatically updated when the page changes and displayed only if needed
        previousPageItem(20, p -> new ItemBuilder(Material.ARROW).name("Page " + p + "/" + lastPage()).build());
        nextPageItem(24, p -> new ItemBuilder(Material.ARROW).name("Page " + p + "/" + lastPage()).build());

        // Add some paginated content to the inventory
        for (int i = 1; i < 64; i++) {
            addContent(new ItemStack(Material.GOLDEN_APPLE, i),
                    e -> e.getWhoClicked().sendMessage("You clicked on paginated item"));
        }

        // The setContent method can also be used to set the index of a specific item of the paginated content
        setContent(42, new ItemStack(Material.APPLE, 42));

        // Non-paginated items can also still be added to the inventory if needed
        setItem(26, new ItemBuilder(Material.BARRIER).name("Close").build(),
                e -> e.getWhoClicked().closeInventory());

        // The pagination layout can also be customized with a mask instead of the default one
        SCHEME.apply(this);
    }

    @Override // Optional method to handle the page change event if needed
    protected void onPageChange(int page) {
        // Called after the page change
        setItem(18, new ItemBuilder(Material.PAPER).name("Current page " + page).build());
    }
}

Like a normal inventory, you can open the paginated inventory with open(player):

new ExamplePaginatedInventory().open(player);

Creating a 'compact' inventory

Instead of creating a new class for each inventory, a 'compact' inventory can be created directly:

FastInv inv = new FastInv(InventoryType.DISPENSER, "Example compact inventory");

inv.setItem(4, new ItemStack(Material.NAME_TAG), e -> e.getWhoClicked().sendMessage("You clicked on the name tag"));
inv.addClickHandler(e -> player.sendMessage("You clicked on slot " + e.getSlot()));
inv.addCloseHandler(e -> player.sendMessage(ChatColor.YELLOW + "Inventory closed"));
inv.open(player);

In the same way, you can also create a 'compact' paginated inventory.

Get the FastInv instance

You can easily get the FastInv instance from a Bukkit inventory with the holder:

if (inventory.getHolder() instanceof FastInv) {
    FastInv fastInv = (FastInv) inventory.getHolder();
}

Adventure components support

FastInv supports Adventure components for inventory titles on PaperMC servers:

Component title = Component.text("Hello World");

FastInv inv = new FastInv(owner -> Bukkit.createInventory(owner, 27, title));