Implemented new Inventory windows on Player, Chest and Furnace

src/pocketmine/inventory/DoubleChestInventory.php

@@ -0,0 +1,101 @@
+<?php
+
+/*
+ *
+ *  ____            _        _   __  __ _                  __  __ ____
+ * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
+ * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
+ * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
+ * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * @author PocketMine Team
+ * @link http://www.pocketmine.net/
+ *
+ *
+*/
+
+namespace pocketmine\inventory;
+
+use pocketmine\item\Item;
+use pocketmine\tile\Chest;
+
+class DoubleChestInventory extends ChestInventory implements InventoryHolder{
+	/** @var ChestInventory */
+	private $left;
+	/** @var ChestInventory */
+	private $right;
+
+	public function __construct(Chest $left, Chest $right){
+		$this->left = $left->getRealInventory();
+		$this->right = $right->getRealInventory();
+		BaseInventory::__construct($this, InventoryType::get(InventoryType::DOUBLE_CHEST));
+	}
+
+	//TODO
+	public function getInventory(){
+		return $this;
+	}
+
+	//TODO
+	public function getHolder(){
+		return $this->left;
+	}
+
+	public function getItem($index){
+		return $index < $this->left->getSize() ? $this->left->getItem($index) : $this->right->getItem($index - $this->right->getSize());
+	}
+
+	public function setItem($index, Item $item){
+		return $index < $this->left->getSize() ? $this->left->setItem($index, $item) : $this->right->setItem($index - $this->right->getSize(), $item);
+	}
+
+	public function clear($index){
+		return $index < $this->left->getSize() ? $this->left->clear($index) : $this->right->clear($index - $this->right->getSize());
+	}
+
+	public function getContents(){
+		$contents = [];
+		for($i = 0; $i < $this->getSize(); ++$i){
+			$contents[$i] = $this->getItem($i);
+		}
+
+		return $contents;
+	}
+
+	/**
+	 * @param Item[] $items
+	 */
+	public function setContents(array $items){
+		if(count($items) > $this->size){
+			$items = array_slice($items, 0, $this->size, true);
+		}
+
+		parent::setContents($items);
+
+		$leftItems = array_slice($items, 0, $this->left->getSize(), true);
+		$this->left->setContents($leftItems);
+		if(count($items) > $this->left->getSize()){
+			$rightItems = array_slice($items, $this->left->getSize() - 1, $this->right->getSize(), true);
+			$this->right->setContents($rightItems);
+		}
+	}
+
+	/**
+	 * @return ChestInventory
+	 */
+	public function getLeftSide(){
+		return $this->left;
+	}
+
+	/**
+	 * @return ChestInventory
+	 */
+	public function getRightSide(){
+		return $this->right;
+	}
+}