C++ cItem类代码示例

bool cSlotArea::CollectItemsToHand(cItem & a_Dragging, cPlayer & a_Player, bool a_CollectFullStacks)
{
	int NumSlots = GetNumSlots();
	for (int i = 0; i < NumSlots; i++)
	{
		const cItem & SlotItem = *GetSlot(i, a_Player);
		if (!SlotItem.IsEqual(a_Dragging))
		{
			continue;
		}
		int ToMove = a_Dragging.GetMaxStackSize() - a_Dragging.m_ItemCount;
		if (ToMove > SlotItem.m_ItemCount)
		{
			ToMove = SlotItem.m_ItemCount;
		}
		a_Dragging.m_ItemCount += ToMove;
		cItem NewSlot(SlotItem);
		NewSlot.m_ItemCount -= ToMove;
		SetSlot(i, a_Player, NewSlot);
		if (!NewSlot.IsEmpty())
		{
			// There are leftovers in the slot, so a_Dragging must be full
			return true;
		}
	}  // for i - Slots[]
	// a_Dragging may be full if there were exactly the number of items needed to fill it
	return a_Dragging.IsFullStack();
}

void cSlotAreaArmor::DistributeStack(cItem & a_ItemStack, cPlayer & a_Player, bool a_ShouldApply, bool a_KeepEmptySlots)
{
	if (ItemCategory::IsHelmet(a_ItemStack.m_ItemType) && GetSlot(0, a_Player)->IsEmpty())
	{
		if (a_ShouldApply)
		{
			SetSlot(0, a_Player, a_ItemStack.CopyOne());
		}
		a_ItemStack.m_ItemCount -= 1;
	}
	else if (ItemCategory::IsChestPlate(a_ItemStack.m_ItemType) && GetSlot(1, a_Player)->IsEmpty())
	{
		if (a_ShouldApply)
		{
			SetSlot(1, a_Player, a_ItemStack.CopyOne());
		}
		a_ItemStack.m_ItemCount -= 1;
	}
	else if (ItemCategory::IsLeggings(a_ItemStack.m_ItemType) && GetSlot(2, a_Player)->IsEmpty())
	{
		if (a_ShouldApply)
		{
			SetSlot(2, a_Player, a_ItemStack.CopyOne());
		}
		a_ItemStack.m_ItemCount -= 1;
	}
	else if (ItemCategory::IsBoots(a_ItemStack.m_ItemType) && GetSlot(3, a_Player)->IsEmpty())
	{
		if (a_ShouldApply)
		{
			SetSlot(3, a_Player, a_ItemStack.CopyOne());
		}
		a_ItemStack.m_ItemCount -= 1;
	}
}

/*
\brief Check if two item are similar so pileable
\author Endymion
\todo add amx vars and events
\note if same item is compared, false is returned
*/
inline bool operator ==( cItem& a, cItem& b ) {
	return  ( a.pileable && b.pileable ) &&
			( a.getSerial32() != b.getSerial32() ) &&
			( a.getScriptID() == b.getScriptID() ) &&
			( a.getId() == b.getId() ) &&
			( a.getColor() == b.getColor() ) &&
			( a.poisoned == b.poisoned );
}

void cProtocol125::WriteItem(const cItem & a_Item)
{
	short ItemType = a_Item.m_ItemType;
	ASSERT(ItemType >= -1);  // Check validity of packets in debug runtime
	if (ItemType <= 0)
	{
		// Fix, to make sure no invalid values are sent.
		ItemType = -1;
	}
	
	WriteShort(ItemType);
	if (a_Item.IsEmpty())
	{
		return;
	}
	
	WriteChar (a_Item.m_ItemCount);
	WriteShort(a_Item.m_ItemDamage);
	
	if (cItem::IsEnchantable(a_Item.m_ItemType))
	{
		// TODO: Implement enchantments
		WriteShort(-1);
	}
}

void cSlotAreaAnvil::DistributeStack(cItem & a_ItemStack, cPlayer & a_Player, bool a_ShouldApply, bool a_KeepEmptySlots)
{
	for (int i = 0; i < 2; i++)
	{
		const cItem * Slot = GetSlot(i, a_Player);
		if (!Slot->IsEqual(a_ItemStack) && (!Slot->IsEmpty() || a_KeepEmptySlots))
		{
			// Different items
			continue;
		}
		int NumFit = ItemHandler(Slot->m_ItemType)->GetMaxStackSize() - Slot->m_ItemCount;
		if (NumFit <= 0)
		{
			// Full stack already
			continue;
		}
		if (NumFit > a_ItemStack.m_ItemCount)
		{
			NumFit = a_ItemStack.m_ItemCount;
		}
		if (a_ShouldApply)
		{
			cItem NewSlot(a_ItemStack);
			NewSlot.m_ItemCount = Slot->m_ItemCount + NumFit;
			SetSlot(i, a_Player, NewSlot);
		}
		a_ItemStack.m_ItemCount -= NumFit;
		if (a_ItemStack.IsEmpty())
		{
			UpdateResult(a_Player);
			return;
		}
	}  // for i - Slots
	UpdateResult(a_Player);
}

/// Moves one of the specified itemstack into this hopper. Returns true if contents have changed. Doesn't change the itemstack.
bool cHopperEntity::MoveItemsFromSlot(const cItem & a_ItemStack, bool a_AllowNewStacks)
{
	cItem One(a_ItemStack.CopyOne());
	if (m_Contents.AddItem(One, a_AllowNewStacks) > 0)
	{
		return true;
	}
	return false;
}

void cHero::giveItem(cItem iItem)
{
	if (iItem.getType() == item_weapon && mWeapon.getType() != item_armor)
	{
		mWeapon.setItem(iItem.getName(), iItem.getType(), iItem.getBonus());
	}
	else if (iItem.getType() == item_armor && mArmor.getType() != item_weapon)
	{
		mArmor.setItem(iItem.getName(), iItem.getType(), iItem.getBonus());
	}
}

void cSlotAreaEnchanting::DistributeStack(cItem & a_ItemStack, cPlayer & a_Player, bool a_Apply, bool a_KeepEmptySlots)
{
	const cItem * Slot = GetSlot(0, a_Player);
	if (!Slot->IsEmpty())
	{
		return;
	}

	if (a_Apply)
	{
		SetSlot(0, a_Player, a_ItemStack.CopyOne());
	}
	a_ItemStack.m_ItemCount -= 1;
	if (a_ItemStack.m_ItemCount <= 0)
	{
		a_ItemStack.Empty();
	}

	UpdateResult(a_Player);
}

bool cItems::ContainsType(const cItem & a_Item)
{
	for (auto itr : *this)
	{
		if (a_Item.IsSameType(itr))
		{
			return true;
		}
	}
	return false;
}

bool cItems::Contains(const cItem & a_Item)
{
	for (auto itr : *this)
	{
		if (a_Item.IsEqual(itr))
		{
			return true;
		}
	}
	return false;
}

int cProtocol125::ParseItem(cItem & a_Item)
{
	HANDLE_PACKET_READ(ReadBEShort, short, ItemType);

	if (ItemType <= -1)
	{
		a_Item.Empty();
		return PARSE_OK;
	}
	a_Item.m_ItemType = ItemType;

	HANDLE_PACKET_READ(ReadChar,    char,  ItemCount);
	HANDLE_PACKET_READ(ReadBEShort, short, ItemDamage);
	a_Item.m_ItemCount  = ItemCount;
	a_Item.m_ItemDamage = ItemDamage;
	if (ItemCount <= 0)
	{
		a_Item.Empty();
	}

	if (!cItem::IsEnchantable(ItemType))
	{
		return PARSE_OK;
	}
	
	HANDLE_PACKET_READ(ReadBEShort, short, EnchantNumBytes);
	
	if (EnchantNumBytes <= 0)
	{
		return PARSE_OK;
	}
		
	// TODO: Enchantment not implemented yet!
	if (!m_ReceivedData.SkipRead((size_t)EnchantNumBytes))
	{
		return PARSE_INCOMPLETE;
	}
	
	return PARSE_OK;
}

void cWindow::DistributeStack(cItem & a_ItemStack, cPlayer & a_Player, cSlotArea * a_ExcludeArea, bool a_ShouldApply)
{
	// Ask each slot area to take as much of the stack as it can.
	// First ask only slots that already have the same kind of item
	// Then ask any remaining slots
	for (int Pass = 0; Pass < 2; ++Pass)
	{
		if (m_ShouldDistributeToHotbarFirst)
		{
			// First distribute into the hotbar:
			if (a_ExcludeArea != m_SlotAreas.back())
			{
				m_SlotAreas.back()->DistributeStack(a_ItemStack, a_Player, a_ShouldApply, (Pass == 0));
				if (a_ItemStack.IsEmpty())
				{
					// Distributed it all
					return;
				}
			}
		}
		
		// The distribute to all other areas:
		cSlotAreas::iterator end = m_ShouldDistributeToHotbarFirst ? (m_SlotAreas.end() - 1) : m_SlotAreas.end();
		for (cSlotAreas::iterator itr = m_SlotAreas.begin(); itr != end; ++itr)
		{
			if (*itr == a_ExcludeArea)
			{
				continue;
			}
			(*itr)->DistributeStack(a_ItemStack, a_Player, a_ShouldApply, (Pass == 0));
			if (a_ItemStack.IsEmpty())
			{
				// Distributed it all
				return;
			}
		}  // for itr - m_SlotAreas[]
	}  // for Pass - repeat twice
}

void cHorse::SetHorseArmor(cItem a_Armor)
{
	if (ItemCategory::IsHorseArmor(a_Armor.m_ItemType))
	{
		m_World->BroadcastSoundEffect("entity.horse.armor", GetPosition(), 1.0f, 0.8f);
	}
	else if (!a_Armor.IsEmpty())
	{
		return;  // Invalid item
	}

	m_Armor = std::move(a_Armor);
	m_World->BroadcastEntityMetadata(*this);
}

int cItemGrid::AddItem(cItem & a_ItemStack, bool a_AllowNewStacks, int a_PrioritarySlot)
{
	int NumLeft = a_ItemStack.m_ItemCount;
	int MaxStack = a_ItemStack.GetMaxStackSize();

	// Try prioritarySlot first:
	if (
		(a_PrioritarySlot != -1) &&
		(
			m_Slots[a_PrioritarySlot].IsEmpty() ||
			m_Slots[a_PrioritarySlot].IsEqual(a_ItemStack)
		)
	)
	{
		NumLeft -= AddItemToSlot(a_ItemStack, a_PrioritarySlot, NumLeft, MaxStack);
	}

	// Scan existing stacks:
	for (int i = 0; i < m_NumSlots; i++)
	{
		if (m_Slots[i].IsEqual(a_ItemStack))
		{
			NumLeft -= AddItemToSlot(a_ItemStack, i, NumLeft, MaxStack);
		}
		if (NumLeft <= 0)
		{
			// All items fit
			return a_ItemStack.m_ItemCount;
		}
	}  // for i - m_Slots[]

	if (!a_AllowNewStacks)
	{
		return (a_ItemStack.m_ItemCount - NumLeft);
	}

	for (int i = 0; i < m_NumSlots; i++)
	{
		if (m_Slots[i].IsEmpty())
		{
			NumLeft -= AddItemToSlot(a_ItemStack, i, NumLeft, MaxStack);
		}
		if (NumLeft <= 0)
		{
			// All items fit
			return a_ItemStack.m_ItemCount;
		}
	}  // for i - m_Slots[]
	return (a_ItemStack.m_ItemCount - NumLeft);
}

void cHorse::SetHorseSaddle(cItem a_Saddle)
{
	if (a_Saddle.m_ItemType == E_ITEM_SADDLE)
	{
		m_World->BroadcastSoundEffect("entity.horse.saddle", GetPosition(), 1.0f, 0.8f);
	}
	else if (!a_Saddle.IsEmpty())
	{
		return;  // Invalid item
	}

	m_Saddle = std::move(a_Saddle);
	m_World->BroadcastEntityMetadata(*this);
}