Upstream Paper

src/main/java/net/minecraft/server/ContainerMerchant.java

@@ -0,0 +1,124 @@
+package net.minecraft.server;
+
+import org.bukkit.craftbukkit.inventory.CraftInventoryView; // CraftBukkit
+
+public class ContainerMerchant extends Container {
+
+    private final IMerchant merchant;
+    private final InventoryMerchant f;
+    private final World g;
+
+    // CraftBukkit start
+    private CraftInventoryView bukkitEntity = null;
+    private PlayerInventory player;
+
+    @Override
+    public CraftInventoryView getBukkitView() {
+        if (bukkitEntity == null) {
+            bukkitEntity = new CraftInventoryView(this.player.player.getBukkitEntity(), new org.bukkit.craftbukkit.inventory.CraftInventoryMerchant((InventoryMerchant) f), this);
+        }
+        return bukkitEntity;
+    }
+    // CraftBukkit end
+
+    public ContainerMerchant(PlayerInventory playerinventory, IMerchant imerchant, World world) {
+        this.merchant = imerchant;
+        this.g = world;
+        this.f = new InventoryMerchant(playerinventory.player, imerchant);
+        this.a(new Slot(this.f, 0, 36, 53));
+        this.a(new Slot(this.f, 1, 62, 53));
+        this.a((Slot) (new SlotMerchantResult(playerinventory.player, imerchant, this.f, 2, 120, 53)));
+        this.player = playerinventory; // CraftBukkit - save player
+
+        int i;
+
+        for (i = 0; i < 3; ++i) {
+            for (int j = 0; j < 9; ++j) {
+                this.a(new Slot(playerinventory, j + i * 9 + 9, 8 + j * 18, 84 + i * 18));
+            }
+        }
+
+        for (i = 0; i < 9; ++i) {
+            this.a(new Slot(playerinventory, i, 8 + i * 18, 142));
+        }
+
+    }
+
+    public InventoryMerchant d() {
+        return this.f;
+    }
+
+    public void a(IInventory iinventory) {
+        this.f.i();
+        super.a(iinventory);
+    }
+
+    public void d(int i) {
+        this.f.d(i);
+    }
+
+    public boolean canUse(EntityHuman entityhuman) {
+        return this.merchant.getTrader() == entityhuman;
+    }
+
+    public ItemStack shiftClick(EntityHuman entityhuman, int i) {
+        ItemStack itemstack = ItemStack.a;
+        Slot slot = (Slot) this.slots.get(i);
+
+        if (slot != null && slot.hasItem()) {
+            ItemStack itemstack1 = slot.getItem();
+
+            itemstack = itemstack1.cloneItemStack();
+            if (i == 2) {
+                if (!this.a(itemstack1, 3, 39, true)) {
+                    return ItemStack.a;
+                }
+
+                slot.a(itemstack1, itemstack);
+            } else if (i != 0 && i != 1) {
+                if (i >= 3 && i < 30) {
+                    if (!this.a(itemstack1, 30, 39, false)) {
+                        return ItemStack.a;
+                    }
+                } else if (i >= 30 && i < 39 && !this.a(itemstack1, 3, 30, false)) {
+                    return ItemStack.a;
+                }
+            } else if (!this.a(itemstack1, 3, 39, false)) {
+                return ItemStack.a;
+            }
+
+            if (itemstack1.isEmpty()) {
+                slot.set(ItemStack.a);
+            } else {
+                slot.f();
+            }
+
+            if (itemstack1.getCount() == itemstack.getCount()) {
+                return ItemStack.a;
+            }
+
+            slot.a(entityhuman, itemstack1);
+        }
+
+        return itemstack;
+    }
+
+    public void b(EntityHuman entityhuman) {
+        super.b(entityhuman);
+        this.merchant.setTradingPlayer((EntityHuman) null);
+        super.b(entityhuman);
+        if (!this.g.isClientSide) {
+            ItemStack itemstack = this.f.splitWithoutUpdate(0);
+
+            if (!itemstack.isEmpty()) {
+                entityhuman.drop(itemstack, false);
+            }
+
+            itemstack = this.f.splitWithoutUpdate(1);
+            if (!itemstack.isEmpty()) {
+                entityhuman.drop(itemstack, false);
+            }
+
+        }
+    }
+}