1 files changed, 665 insertions, 0 deletions
diff --git a/src/ItemGrid.cpp b/src/ItemGrid.cpp
new file mode 100644
index 000000000..e9b86173e
--- /dev/null
+++ b/src/ItemGrid.cpp
@@ -0,0 +1,665 @@
+
+// ItemGrid.cpp
+
+// Implements the cItemGrid class representing a storage for items in a XY grid (chests, dispensers, inventory etc.)
+
+#include "Globals.h"
+#include "ItemGrid.h"
+#include "Items/ItemHandler.h"
+#include "Noise.h"
+
+
+
+
+
+cItemGrid::cItemGrid(int a_Width, int a_Height) :
+	m_Width(a_Width),
+	m_Height(a_Height),
+	m_NumSlots(a_Width * a_Height),
+	m_Slots(new cItem[a_Width * a_Height]),
+	m_IsInTriggerListeners(false)
+{
+}
+
+
+
+
+
+cItemGrid::~cItemGrid()
+{
+	delete[] m_Slots;
+}
+
+
+
+
+
+int cItemGrid::GetSlotNum(int a_X, int a_Y) const
+{
+	if (
+		(a_X < 0) || (a_X >= m_Width) ||
+		(a_Y < 0) || (a_Y >= m_Height)
+	)
+	{
+		LOGWARNING("%s: coords out of range: (%d, %d) in grid of size (%d, %d)",
+			__FUNCTION__, a_X, a_Y, m_Width, m_Height
+		);
+		return -1;
+	}
+	return a_X + m_Width * a_Y;
+}
+
+
+
+
+
+void cItemGrid::GetSlotCoords(int a_SlotNum, int & a_X, int & a_Y) const
+{
+	if ((a_SlotNum < 0) || (a_SlotNum >= m_NumSlots))
+	{
+		LOGWARNING("%s: SlotNum out of range: %d in grid of range %d",
+			__FUNCTION__, a_SlotNum, m_NumSlots
+		);
+		a_X = -1;
+		a_Y = -1;
+		return;
+	}
+	a_X = a_SlotNum % m_Width;
+	a_Y = a_SlotNum / m_Width;
+}
+
+
+
+
+
+const cItem & cItemGrid::GetSlot(int a_X, int a_Y) const
+{
+	return GetSlot(GetSlotNum(a_X, a_Y));
+}
+
+
+
+
+
+const cItem & cItemGrid::GetSlot(int a_SlotNum) const
+{
+	if ((a_SlotNum < 0) || (a_SlotNum >= m_NumSlots))
+	{
+		LOGWARNING("%s: Invalid slot number, %d out of %d slots",
+			__FUNCTION__, a_SlotNum, m_NumSlots
+		);
+		return m_Slots[0];
+	}
+	return m_Slots[a_SlotNum];
+}
+
+
+
+
+
+void cItemGrid::SetSlot(int a_X, int a_Y, const cItem & a_Item)
+{
+	SetSlot(GetSlotNum(a_X, a_Y), a_Item);
+}
+
+
+
+
+
+void cItemGrid::SetSlot(int a_X, int a_Y, short a_ItemType, char a_ItemCount, short a_ItemDamage)
+{
+	SetSlot(GetSlotNum(a_X, a_Y), cItem(a_ItemType, a_ItemCount, a_ItemDamage));
+}
+
+
+
+
+
+void cItemGrid::SetSlot(int a_SlotNum, const cItem & a_Item)
+{
+	if ((a_SlotNum < 0) || (a_SlotNum >= m_NumSlots))
+	{
+		LOGWARNING("%s: Invalid slot number %d out of %d slots",
+			__FUNCTION__, a_SlotNum, m_NumSlots
+		);
+		return;
+	}
+	m_Slots[a_SlotNum] = a_Item;
+	TriggerListeners(a_SlotNum);
+}
+
+
+
+
+
+void cItemGrid::SetSlot(int a_SlotNum, short a_ItemType, char a_ItemCount, short a_ItemDamage)
+{
+	SetSlot(a_SlotNum, cItem(a_ItemType, a_ItemCount, a_ItemDamage));
+}
+
+
+
+
+
+void cItemGrid::EmptySlot(int a_X, int a_Y)
+{
+	EmptySlot(GetSlotNum(a_X, a_Y));
+}
+
+
+
+
+
+void cItemGrid::EmptySlot(int a_SlotNum)
+{
+	if ((a_SlotNum < 0) || (a_SlotNum >= m_NumSlots))
+	{
+		LOGWARNING("%s: Invalid slot number %d out of %d slots",
+			__FUNCTION__, a_SlotNum, m_NumSlots
+		);
+		return;
+	}
+	
+	// Check if already empty:
+	if (m_Slots[a_SlotNum].IsEmpty())
+	{
+		return;
+	}
+	
+	// Empty and notify
+	m_Slots[a_SlotNum].Empty();
+	TriggerListeners(a_SlotNum);
+}
+
+
+
+
+
+bool cItemGrid::IsSlotEmpty(int a_SlotNum) const
+{
+	if ((a_SlotNum < 0) || (a_SlotNum >= m_NumSlots))
+	{
+		LOGWARNING("%s: Invalid slot number %d out of %d slots",
+			__FUNCTION__, a_SlotNum, m_NumSlots
+		);
+		return true;
+	}
+	return m_Slots[a_SlotNum].IsEmpty();
+}
+
+
+
+
+
+bool cItemGrid::IsSlotEmpty(int a_X, int a_Y) const
+{
+	return IsSlotEmpty(GetSlotNum(a_X, a_Y));
+}
+
+
+
+
+
+void cItemGrid::Clear(void)
+{
+	for (int i = 0; i < m_NumSlots; i++)
+	{
+		m_Slots[i].Empty();
+		TriggerListeners(i);
+	}
+}
+
+
+
+
+
+int cItemGrid::HowManyCanFit(const cItem & a_ItemStack, bool a_AllowNewStacks)
+{
+	char NumLeft = a_ItemStack.m_ItemCount;
+	int MaxStack = ItemHandler(a_ItemStack.m_ItemType)->GetMaxStackSize();
+	for (int i = m_NumSlots - 1; i >= 0; i--)
+	{
+		if (m_Slots[i].IsEmpty())
+		{
+			if (a_AllowNewStacks)
+			{
+				NumLeft -= MaxStack;
+			}
+		}
+		else if (m_Slots[i].IsStackableWith(a_ItemStack))
+		{
+			NumLeft -= MaxStack - m_Slots[i].m_ItemCount;
+		}
+		if (NumLeft <= 0)
+		{
+			// All items fit
+			return a_ItemStack.m_ItemCount;
+		}
+	}  // for i - m_Slots[]
+	return a_ItemStack.m_ItemCount - NumLeft;
+}
+
+
+
+
+
+int cItemGrid::AddItemToSlot(const cItem & a_ItemStack, int a_Slot, int a_Num, int a_MaxStack)
+{
+	int PrevCount = 0;
+	if (m_Slots[a_Slot].IsEmpty())
+	{
+		m_Slots[a_Slot] = a_ItemStack;
+		PrevCount = 0;
+	}
+	else
+	{
+		PrevCount = m_Slots[a_Slot].m_ItemCount;
+	}
+	m_Slots[a_Slot].m_ItemCount = std::min(a_MaxStack, PrevCount + a_Num);
+	int toReturn = m_Slots[a_Slot].m_ItemCount - PrevCount;
+	TriggerListeners(a_Slot);
+	return toReturn;
+}
+
+
+
+
+
+int cItemGrid::AddItem(cItem & a_ItemStack, bool a_AllowNewStacks, int a_PrioritarySlot)
+{
+	int NumLeft = a_ItemStack.m_ItemCount;
+	int MaxStack = ItemHandler(a_ItemStack.m_ItemType)->GetMaxStackSize();
+
+	// Try prioritarySlot first:
+	if (
+		(a_PrioritarySlot != -1) &&
+		(
+			m_Slots[a_PrioritarySlot].IsEmpty() ||
+			m_Slots[a_PrioritarySlot].IsStackableWith(a_ItemStack)
+		)
+	)
+	{
+		NumLeft -= AddItemToSlot(a_ItemStack, a_PrioritarySlot, NumLeft, MaxStack);
+	}
+
+	// Scan existing stacks:
+	for (int i = m_NumSlots - 1; i >= 0; i--)
+	{
+		if (m_Slots[i].IsStackableWith(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 = m_NumSlots - 1; i >= 0; 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);
+}
+
+
+
+
+
+int cItemGrid::AddItems(cItems & a_ItemStackList, bool a_AllowNewStacks, int a_PrioritarySlot)
+{
+	int TotalAdded = 0;
+	for (cItems::iterator itr = a_ItemStackList.begin(); itr != a_ItemStackList.end();)
+	{
+		int NumAdded = AddItem(*itr, a_AllowNewStacks, a_PrioritarySlot);
+		if (itr->m_ItemCount == NumAdded)
+		{
+			itr = a_ItemStackList.erase(itr);
+		}
+		else
+		{
+			itr->m_ItemCount -= NumAdded;
+			++itr;
+		}
+		TotalAdded += NumAdded;
+	}
+	return TotalAdded;
+}
+
+
+
+
+
+int cItemGrid::ChangeSlotCount(int a_SlotNum, int a_AddToCount)
+{
+	if ((a_SlotNum < 0) || (a_SlotNum >= m_NumSlots))
+	{
+		LOGWARNING("%s: Invalid slot number %d out of %d slots, ignoring the call, returning -1",
+			__FUNCTION__, a_SlotNum, m_NumSlots
+		);
+		return -1;
+	}
+
+	if (m_Slots[a_SlotNum].IsEmpty())
+	{
+		// The item is empty, it's not gonna change
+		return 0;
+	}
+	
+	if (m_Slots[a_SlotNum].m_ItemCount <= -a_AddToCount)
+	{
+		// Trying to remove more items than there already are, make the item empty
+		m_Slots[a_SlotNum].Empty();
+		TriggerListeners(a_SlotNum);
+		return 0;
+	}
+	
+	m_Slots[a_SlotNum].m_ItemCount += a_AddToCount;
+	TriggerListeners(a_SlotNum);
+	return m_Slots[a_SlotNum].m_ItemCount;
+}
+
+
+
+
+
+int cItemGrid::ChangeSlotCount(int a_X, int a_Y, int a_AddToCount)
+{
+	return ChangeSlotCount(GetSlotNum(a_X, a_Y), a_AddToCount);
+}
+
+
+
+
+
+cItem cItemGrid::RemoveOneItem(int a_SlotNum)
+{
+	if ((a_SlotNum < 0) || (a_SlotNum >= m_NumSlots))
+	{
+		LOGWARNING("%s: Invalid slot number %d out of %d slots, ignoring the call, returning empty item",
+			__FUNCTION__, a_SlotNum, m_NumSlots
+		);
+		return cItem();
+	}
+	
+	// If the slot is empty, return an empty item
+	if (m_Slots[a_SlotNum].IsEmpty())
+	{
+		return cItem();
+	}
+	
+	// Make a copy of the item in slot, set count to 1 and remove one from the slot
+	cItem res = m_Slots[a_SlotNum];
+	res.m_ItemCount = 1;
+	m_Slots[a_SlotNum].m_ItemCount -= 1;
+	
+	// Emptying the slot correctly if appropriate
+	if (m_Slots[a_SlotNum].m_ItemCount == 0)
+	{
+		m_Slots[a_SlotNum].Empty();
+	}
+	
+	// Notify everyone of the change
+	TriggerListeners(a_SlotNum);
+	
+	// Return the stored one item
+	return res;
+}
+
+
+
+
+
+cItem cItemGrid::RemoveOneItem(int a_X, int a_Y)
+{
+	return RemoveOneItem(GetSlotNum(a_X, a_Y));
+}
+
+
+
+
+
+int cItemGrid::HowManyItems(const cItem & a_Item)
+{
+	int res = 0;
+	for (int i = 0; i < m_NumSlots; i++)
+	{
+		if (m_Slots[i].IsStackableWith(a_Item))
+		{
+			res += m_Slots[i].m_ItemCount;
+		}
+	}
+	return res;
+}
+
+
+
+
+
+bool cItemGrid::HasItems(const cItem & a_ItemStack)
+{
+	int CurrentlyHave = HowManyItems(a_ItemStack);
+	return (CurrentlyHave >= a_ItemStack.m_ItemCount);
+}
+
+
+
+
+
+int cItemGrid::GetFirstEmptySlot(void) const
+{
+	return GetNextEmptySlot(-1);
+}
+
+
+
+
+
+int cItemGrid::GetFirstUsedSlot(void) const
+{
+	return GetNextUsedSlot(-1);
+}
+
+
+
+
+
+int cItemGrid::GetLastEmptySlot(void) const
+{
+	for (int i = m_NumSlots - 1; i >= 0; i--)
+	{
+		if (m_Slots[i].IsEmpty())
+		{
+			return i;
+		}
+	}
+	return -1;
+}
+
+
+
+
+
+int cItemGrid::GetLastUsedSlot(void) const
+{
+	for (int i = m_NumSlots - 1; i >= 0; i--)
+	{
+		if (!m_Slots[i].IsEmpty())
+		{
+			return i;
+		}
+	}
+	return -1;
+}
+
+
+
+
+
+int cItemGrid::GetNextEmptySlot(int a_StartFrom) const
+{
+	for (int i = a_StartFrom + 1; i < m_NumSlots; i++)
+	{
+		if (m_Slots[i].IsEmpty())
+		{
+			return i;
+		}
+	}
+	return -1;
+}
+
+
+
+
+
+int cItemGrid::GetNextUsedSlot(int a_StartFrom) const
+{
+	for (int i = a_StartFrom + 1; i < m_NumSlots; i++)
+	{
+		if (!m_Slots[i].IsEmpty())
+		{
+			return i;
+		}
+	}
+	return -1;
+}
+
+
+
+
+
+void cItemGrid::CopyToItems(cItems & a_Items) const
+{
+	for (int i = 0; i < m_NumSlots; i++)
+	{
+		if (!m_Slots[i].IsEmpty())
+		{
+			a_Items.push_back(m_Slots[i]);
+		}
+	}  // for i - m_Slots[]
+}
+
+
+
+
+
+bool cItemGrid::DamageItem(int a_SlotNum, short a_Amount)
+{
+	if ((a_SlotNum < 0) || (a_SlotNum >= m_NumSlots))
+	{
+		LOGWARNING("%s: invalid slot number %d out of %d slots, ignoring.", __FUNCTION__, a_SlotNum, m_NumSlots);
+		return false;
+	}
+	return m_Slots[a_SlotNum].DamageItem(a_Amount);
+}
+
+
+
+
+
+bool cItemGrid::DamageItem(int a_X, int a_Y, short a_Amount)
+{
+	return DamageItem(GetSlotNum(a_X, a_Y), a_Amount);
+}
+
+
+
+
+
+void cItemGrid::GenerateRandomLootWithBooks(const cLootProbab * a_LootProbabs, int a_CountLootProbabs, int a_NumSlots, int a_Seed)
+{
+	// Calculate the total weight:
+	int TotalProbab = 1;
+	for (int i = 0; i < a_CountLootProbabs; i++)
+	{
+		TotalProbab += a_LootProbabs[i].m_Weight;
+	}
+	
+	// Pick the loot items:
+	cNoise Noise(a_Seed);
+	for (int i = 0; i < a_NumSlots; i++)
+	{
+		int Rnd = (Noise.IntNoise1DInt(i) / 7);
+		int LootRnd = Rnd % TotalProbab;
+		Rnd >>= 8;
+		cItem CurrentLoot = cItem(E_ITEM_BOOK, 1, 0);  // TODO: enchantment
+		for (int j = 0; j < a_CountLootProbabs; j++)
+		{
+			LootRnd -= a_LootProbabs[i].m_Weight;
+			if (LootRnd < 0)
+			{
+				CurrentLoot = a_LootProbabs[i].m_Item;
+				CurrentLoot.m_ItemCount = a_LootProbabs[i].m_MinAmount + (Rnd % (a_LootProbabs[i].m_MaxAmount - a_LootProbabs[i].m_MinAmount));
+				Rnd >>= 8;
+				break;
+			}
+		}  // for j - a_LootProbabs[]
+		SetSlot(Rnd % m_NumSlots, CurrentLoot);
+	}  // for i - NumSlots
+}
+
+
+
+
+
+void cItemGrid::AddListener(cListener & a_Listener)
+{
+	cCSLock Lock(m_CSListeners);
+	ASSERT(!m_IsInTriggerListeners);  // Must not call this while in TriggerListeners()
+	m_Listeners.push_back(&a_Listener);
+}
+
+
+
+
+
+void cItemGrid::RemoveListener(cListener & a_Listener)
+{
+	cCSLock Lock(m_CSListeners);
+	ASSERT(!m_IsInTriggerListeners);  // Must not call this while in TriggerListeners()
+	for (cListeners::iterator itr = m_Listeners.begin(), end = m_Listeners.end(); itr != end; ++itr)
+	{
+		if (*itr == &a_Listener)
+		{
+			m_Listeners.erase(itr);
+			return;
+		}
+	}  // for itr - m_Listeners[]
+}
+
+
+
+
+
+void cItemGrid::TriggerListeners(int a_SlotNum)
+{
+	cListeners Listeners;
+	{
+		cCSLock Lock(m_CSListeners);
+		m_IsInTriggerListeners = true;
+		Listeners = m_Listeners;
+	}
+	for (cListeners::iterator itr = Listeners.begin(), end = Listeners.end(); itr != end; ++itr)
+	{
+		(*itr)->OnSlotChanged(this, a_SlotNum);
+	}  // for itr - m_Listeners[]
+	m_IsInTriggerListeners = false;
+}
+
+
+
+