/// Moves one piece of the specified a_Entity's slot itemstack into this hopper. Returns true if contents have changed. Doesn't change the itemstack.
bool cHopperEntity::MoveItemsFromSlot(cBlockEntityWithItems & a_Entity, int a_SlotNum, bool a_AllowNewStacks)
{
cItem One(a_Entity.GetSlot(a_SlotNum).CopyOne());
for (int i = 0; i < ContentsWidth * ContentsHeight; i++)
{
if (m_Contents.IsSlotEmpty(i))
{
if (a_AllowNewStacks)
{
if (cPluginManager::Get()->CallHookHopperPullingItem(*m_World, *this, i, a_Entity, a_SlotNum))
{
// Plugin disagrees with the move
continue;
}
}
m_Contents.SetSlot(i, One);
return true;
}
else if (m_Contents.GetSlot(i).IsEqual(One))
{
if (cPluginManager::Get()->CallHookHopperPullingItem(*m_World, *this, i, a_Entity, a_SlotNum))
{
// Plugin disagrees with the move
continue;
}
m_Contents.ChangeSlotCount(i, 1);
return true;
}
}
return false;
}
bool cHopperEntity::MoveItemsFromGrid(cBlockEntityWithItems & a_Entity)
{
cItemGrid & Grid = a_Entity.GetContents();
int NumSlots = Grid.GetNumSlots();
// First try adding items of types already in the hopper:
for (int i = 0; i < NumSlots; i++)
{
if (Grid.IsSlotEmpty(i))
{
continue;
}
if (MoveItemsFromSlot(a_Entity, i, false))
{
Grid.ChangeSlotCount(i, -1);
return true;
}
}
// No already existing stack can be topped up, try again with allowing new stacks:
for (int i = 0; i < NumSlots; i++)
{
if (Grid.IsSlotEmpty(i))
{
continue;
}
if (MoveItemsFromSlot(a_Entity, i, true))
{
Grid.ChangeSlotCount(i, -1);
return true;
}
}
return false;
}
bool cHopperEntity::MoveItemsToGrid(cBlockEntityWithItems & a_Entity)
{
// Iterate through our slots, try to move from each one:
int NumSlots = a_Entity.GetContents().GetNumSlots();
for (int i = 0; i < NumSlots; i++)
{
if (MoveItemsToSlot(a_Entity, i))
{
return true;
}
}
return false;
}
bool cHopperEntity::MoveItemsToSlot(cBlockEntityWithItems & a_Entity, int a_DstSlotNum)
{
cItemGrid & Grid = a_Entity.GetContents();
if (Grid.IsSlotEmpty(a_DstSlotNum))
{
// The slot is empty, move the first non-empty slot from our contents:
for (int i = 0; i < ContentsWidth * ContentsHeight; i++)
{
if (!m_Contents.IsSlotEmpty(i))
{
if (cPluginManager::Get()->CallHookHopperPushingItem(*m_World, *this, i, a_Entity, a_DstSlotNum))
{
// A plugin disagrees with the move
continue;
}
Grid.SetSlot(a_DstSlotNum, m_Contents.GetSlot(i).CopyOne());
m_Contents.ChangeSlotCount(i, -1);
return true;
}
}
return false;
}
else
{
// The slot is taken, try to top it up:
const cItem & DestSlot = Grid.GetSlot(a_DstSlotNum);
if (DestSlot.IsFullStack())
{
return false;
}
for (int i = 0; i < ContentsWidth * ContentsHeight; i++)
{
if (m_Contents.GetSlot(i).IsEqual(DestSlot))
{
if (cPluginManager::Get()->CallHookHopperPushingItem(*m_World, *this, i, a_Entity, a_DstSlotNum))
{
// A plugin disagrees with the move
continue;
}
Grid.ChangeSlotCount(a_DstSlotNum, 1);
m_Contents.ChangeSlotCount(i, -1);
return true;
}
}
return false;
}
}
bool cHopperEntity::MoveItemsFromGrid(cBlockEntityWithItems & a_Entity)
{
cItemGrid & Grid = a_Entity.GetContents();
int NumSlots = Grid.GetNumSlots();
for (int i = 0; i < NumSlots; i++)
{
if (Grid.IsSlotEmpty(i))
{
continue;
}
if (MoveItemsFromSlot(a_Entity, i))
{
Grid.ChangeSlotCount(i, -1);
return true;
}
}
return false;
}
bool cHopperEntity::MoveItemsFromSlot(cBlockEntityWithItems & a_Entity, int a_SlotNum)
{
cItem One(a_Entity.GetSlot(a_SlotNum).CopyOne());
for (int i = 0; i < ContentsWidth * ContentsHeight; i++)
{
if (m_Contents.IsSlotEmpty(i))
{
if (cPluginManager::Get()->CallHookHopperPullingItem(*m_World, *this, i, a_Entity, a_SlotNum))
{
// Plugin disagrees with the move
continue;
}
m_Contents.SetSlot(i, One);
return true;
}
else if (m_Contents.GetSlot(i).IsEqual(One))
{
if (cPluginManager::Get()->CallHookHopperPullingItem(*m_World, *this, i, a_Entity, a_SlotNum))
{
// Plugin disagrees with the move
continue;
}
auto PreviousCount = m_Contents.GetSlot(i).m_ItemCount;
m_Contents.ChangeSlotCount(i, 1);
if (PreviousCount + 1 == m_Contents.GetSlot(i).m_ItemCount)
{
// Successfully added a new item. (Failure condition consistutes: stack full)
return true;
}
}
}
return false;
}