protected boolean a(ItemStack itemstack, int i, int j, boolean flag) {
boolean flag1 = false;
int k = i;
if (flag) {
k = j - 1;
}
Slot slot;
ItemStack itemstack1;
if (itemstack.isStackable()) {
while (itemstack.count > 0 && (!flag && k < j || flag && k >= i)) {
slot = (Slot) this.c.get(k);
itemstack1 = slot.getItem();
if (itemstack1 != null
&& itemstack1.id == itemstack.id
&& (!itemstack.usesData() || itemstack.getData() == itemstack1.getData())
&& ItemStack.equals(itemstack, itemstack1)) {
int l = itemstack1.count + itemstack.count;
if (l <= itemstack.getMaxStackSize()) {
itemstack.count = 0;
itemstack1.count = l;
slot.e();
flag1 = true;
} else if (itemstack1.count < itemstack.getMaxStackSize()) {
itemstack.count -= itemstack.getMaxStackSize() - itemstack1.count;
itemstack1.count = itemstack.getMaxStackSize();
slot.e();
flag1 = true;
}
}
if (flag) {
--k;
} else {
++k;
}
}
}
if (itemstack.count > 0) {
if (flag) {
k = j - 1;
} else {
k = i;
}
while (!flag && k < j || flag && k >= i) {
slot = (Slot) this.c.get(k);
itemstack1 = slot.getItem();
if (itemstack1 == null) {
slot.set(itemstack.cloneItemStack());
slot.e();
itemstack.count = 0;
flag1 = true;
break;
}
if (flag) {
--k;
} else {
++k;
}
}
}
return flag1;
}
public ItemStack clickItem(int i, int j, int k, EntityHuman entityhuman) {
ItemStack itemstack = null;
PlayerInventory playerinventory = entityhuman.inventory;
Slot slot;
ItemStack itemstack1;
int l;
ItemStack itemstack2;
if ((k == 0 || k == 1) && (j == 0 || j == 1)) {
if (i == -999) {
if (playerinventory.getCarried() != null && i == -999) {
if (j == 0) {
entityhuman.drop(playerinventory.getCarried());
playerinventory.setCarried((ItemStack) null);
}
if (j == 1) {
// CraftBukkit start - store a reference
ItemStack itemstack3 = playerinventory.getCarried();
if (itemstack3.count > 0) {
entityhuman.drop(itemstack3.a(1));
}
if (itemstack3.count == 0) {
// CraftBukkit end
playerinventory.setCarried((ItemStack) null);
}
}
}
} else if (k == 1) {
slot = (Slot) this.c.get(i);
if (slot != null && slot.a(entityhuman)) {
itemstack1 = this.b(entityhuman, i);
if (itemstack1 != null) {
int i1 = itemstack1.id;
itemstack = itemstack1.cloneItemStack();
if (slot != null && slot.getItem() != null && slot.getItem().id == i1) {
this.a(i, j, true, entityhuman);
}
}
}
} else {
if (i < 0) {
return null;
}
slot = (Slot) this.c.get(i);
if (slot != null) {
itemstack1 = slot.getItem();
ItemStack itemstack3 = playerinventory.getCarried();
if (itemstack1 != null) {
itemstack = itemstack1.cloneItemStack();
}
if (itemstack1 == null) {
if (itemstack3 != null && slot.isAllowed(itemstack3)) {
l = j == 0 ? itemstack3.count : 1;
if (l > slot.a()) {
l = slot.a();
}
// CraftBukkit start
if (itemstack3.count >= l) {
slot.set(itemstack3.a(l));
}
// CraftBukkit end
if (itemstack3.count == 0) {
playerinventory.setCarried((ItemStack) null);
}
}
} else if (slot.a(entityhuman)) {
if (itemstack3 == null) {
l = j == 0 ? itemstack1.count : (itemstack1.count + 1) / 2;
itemstack2 = slot.a(l);
playerinventory.setCarried(itemstack2);
if (itemstack1.count == 0) {
slot.set((ItemStack) null);
}
slot.a(entityhuman, playerinventory.getCarried());
} else if (slot.isAllowed(itemstack3)) {
if (itemstack1.id == itemstack3.id
&& (!itemstack1.usesData() || itemstack1.getData() == itemstack3.getData())
&& ItemStack.equals(itemstack1, itemstack3)) {
l = j == 0 ? itemstack3.count : 1;
if (l > slot.a() - itemstack1.count) {
l = slot.a() - itemstack1.count;
}
if (l > itemstack3.getMaxStackSize() - itemstack1.count) {
l = itemstack3.getMaxStackSize() - itemstack1.count;
}
itemstack3.a(l);
if (itemstack3.count == 0) {
playerinventory.setCarried((ItemStack) null);
}
itemstack1.count += l;
} else if (itemstack3.count <= slot.a()) {
slot.set(itemstack3);
playerinventory.setCarried(itemstack1);
}
} else if (itemstack1.id == itemstack3.id
&& itemstack3.getMaxStackSize() > 1
&& (!itemstack1.usesData() || itemstack1.getData() == itemstack3.getData())
&& ItemStack.equals(itemstack1, itemstack3)) {
l = itemstack1.count;
if (l > 0 && l + itemstack3.count <= itemstack3.getMaxStackSize()) {
itemstack3.count += l;
itemstack1 = slot.a(l);
if (itemstack1.count == 0) {
slot.set((ItemStack) null);
}
slot.a(entityhuman, playerinventory.getCarried());
}
}
}
slot.e();
}
}
} else if (k == 2 && j >= 0 && j < 9) {
slot = (Slot) this.c.get(i);
if (slot.a(entityhuman)) {
itemstack1 = playerinventory.getItem(j);
boolean flag =
itemstack1 == null || slot.inventory == playerinventory && slot.isAllowed(itemstack1);
l = -1;
if (!flag) {
l = playerinventory.i();
flag |= l > -1;
}
if (slot.d() && flag) {
itemstack2 = slot.getItem();
playerinventory.setItem(j, itemstack2);
if ((slot.inventory != playerinventory || !slot.isAllowed(itemstack1))
&& itemstack1 != null) {
if (l > -1) {
playerinventory.pickup(itemstack1);
slot.set((ItemStack) null);
slot.a(entityhuman, itemstack2);
}
} else {
slot.set(itemstack1);
slot.a(entityhuman, itemstack2);
}
} else if (!slot.d() && itemstack1 != null && slot.isAllowed(itemstack1)) {
playerinventory.setItem(j, (ItemStack) null);
slot.set(itemstack1);
}
}
} else if (k == 3
&& entityhuman.abilities.canInstantlyBuild
&& playerinventory.getCarried() == null
&& i >= 0) {
slot = (Slot) this.c.get(i);
if (slot != null && slot.d()) {
itemstack1 = slot.getItem().cloneItemStack();
itemstack1.count = itemstack1.getMaxStackSize();
playerinventory.setCarried(itemstack1);
}
}
return itemstack;
}