Fix MC-161754

sources/src/main/java/net/minecraft/server/ContainerHorse.java

@@ -0,0 +1,115 @@
+package net.minecraft.server;
+
+// CraftBukkit start
+import org.bukkit.craftbukkit.inventory.CraftInventoryView;
+import org.bukkit.inventory.InventoryView;
+// CraftBukkit end
+
+public class ContainerHorse extends Container {
+
+    private final IInventory a;
+    private final EntityHorseAbstract f;
+
+    // CraftBukkit start
+    org.bukkit.craftbukkit.inventory.CraftInventoryView bukkitEntity;
+    PlayerInventory player;
+
+    @Override
+    public InventoryView getBukkitView() {
+        if (bukkitEntity != null) {
+            return bukkitEntity;
+        }
+
+        return bukkitEntity = new CraftInventoryView(player.player.getBukkitEntity(), a.getOwner().getInventory(), this);
+    }
+
+    public ContainerHorse(IInventory iinventory, final IInventory iinventory1, final EntityHorseAbstract entityhorseabstract, EntityHuman entityhuman) {
+        player = (PlayerInventory) iinventory;
+        // CraftBukkit end
+        this.a = iinventory1;
+        this.f = entityhorseabstract;
+        boolean flag = true;
+
+        iinventory1.startOpen(entityhuman);
+        boolean flag1 = true;
+
+        this.a(new Slot(iinventory1, 0, 8, 18) {
+            public boolean isAllowed(ItemStack itemstack) {
+                return itemstack.getItem() == Items.SADDLE && !this.hasItem() && entityhorseabstract.dF();
+            }
+        });
+        this.a(new Slot(iinventory1, 1, 8, 36) {
+            public boolean isAllowed(ItemStack itemstack) {
+                return entityhorseabstract.f(itemstack);
+            }
+
+            public int getMaxStackSize() {
+                return 1;
+            }
+        });
+        int i;
+        int j;
+
+        if (entityhorseabstract instanceof EntityHorseChestedAbstract && ((EntityHorseChestedAbstract) entityhorseabstract).isCarryingChest()) {
+            for (i = 0; i < 3; ++i) {
+                for (j = 0; j < ((EntityHorseChestedAbstract) entityhorseabstract).dt(); ++j) {
+                    this.a(new Slot(iinventory1, 2 + j + i * ((EntityHorseChestedAbstract) entityhorseabstract).dt(), 80 + j * 18, 18 + i * 18));
+                }
+            }
+        }
+
+        for (i = 0; i < 3; ++i) {
+            for (j = 0; j < 9; ++j) {
+                this.a(new Slot(iinventory, j + i * 9 + 9, 8 + j * 18, 102 + i * 18 + -18));
+            }
+        }
+
+        for (i = 0; i < 9; ++i) {
+            this.a(new Slot(iinventory, i, 8 + i * 18, 142));
+        }
+
+    }
+
+    public boolean canUse(EntityHuman entityhuman) {
+		return this.a.a(entityhuman) && this.f.isAlive() && this.f.valid && this.f.g((Entity) entityhuman) < 8.0F; // NeonPaper! - Fix MC-161754
+    }
+
+    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 < this.a.getSize()) {
+                if (!this.a(itemstack1, this.a.getSize(), this.slots.size(), true)) {
+                    return ItemStack.a;
+                }
+            } else if (this.getSlot(1).isAllowed(itemstack1) && !this.getSlot(1).hasItem()) {
+                if (!this.a(itemstack1, 1, 2, false)) {
+                    return ItemStack.a;
+                }
+            } else if (this.getSlot(0).isAllowed(itemstack1)) {
+                if (!this.a(itemstack1, 0, 1, false)) {
+                    return ItemStack.a;
+                }
+            } else if (this.a.getSize() <= 2 || !this.a(itemstack1, 2, this.a.getSize(), false)) {
+                return ItemStack.a;
+            }
+
+            if (itemstack1.isEmpty()) {
+                slot.set(ItemStack.a);
+            } else {
+                slot.f();
+            }
+        }
+
+        return itemstack;
+    }
+
+    public void b(EntityHuman entityhuman) {
+        super.b(entityhuman);
+        this.a.closeContainer(entityhuman);
+    }
+}