public void CellStateChanged(object sender, CellStateChangedEventArgs e)
{
Cell firstCell = null;
bool completed = true;
for (int c = 0; c < NumCellsPerAxis; c++)
{
for (int r = 0; r < NumCellsPerAxis; r++)
{
Cell cell = Playfield.GetCell(c + Column, r + Row);
if (firstCell == null)
{
firstCell = cell;
}
if (!cell.IsOccupied ||
!firstCell.IsSameColor(cell))
{
completed = false;
break;
}
}
}
if (completed && State != States.Completing)
{
foreach (var c in new Cell[] { UpperLeft, UpperRight, LowerLeft, LowerRight })
{
if (!c.IsRemove)
{
c.RemoveState = Cell.RemoveStates.WillBeRemoved;
}
}
}
else if (!completed)
{
foreach (var c in new Cell[] { UpperLeft, UpperRight, LowerLeft, LowerRight })
{
bool clearRemoveState = true;
foreach (var s in GetOtherSquares(c))
{
if (s?.State == States.Completing)
{
clearRemoveState = false;
break;
}
}
if (clearRemoveState && !c.IsJewelRemove)
{
c.RemoveState = Cell.RemoveStates.NotRemoved;
}
}
}
if (_prevState != State)
{
_prevState = State;
StateChanged?.Invoke(this, EventArgs.Empty);
}
}
internal void ProcessJewel(Cell cell, Cell jeweled, bool removingSpecialJewelCells, bool[,] marker)
{
// prevent stack overflow
if (marker[cell.Column, cell.Row])
{
return;
}
marker[cell.Column, cell.Row] = true;
if (cell == jeweled || cell.IsSameColor(jeweled))
{
InProcessOfRemovingJewelCells = true;
bool isJewelRemoving = cell.RemoveState == Cell.RemoveStates.JewelWillBeRemoved ||
cell.RemoveState == Cell.RemoveStates.JewelRemoving;
if (!isJewelRemoving && !cell.IsRemove && !cell.IsJewelRemove)
{
cell.RemoveState = Cell.RemoveStates.JewelWillBeRemoved;
cell.RemoveStateColumnAbs = Timeline.TotalColumnAbs;
}
if (Timeline.Column == cell.Column &&
cell.RemoveState == Cell.RemoveStates.JewelWillBeRemoved && removingSpecialJewelCells)
{
cell.RemoveState = Cell.RemoveStates.JewelRemoving;
cell.RemoveStateColumnAbs = Timeline.TotalColumnAbs;
}
Cell um, ml, mr, lm;
if (jeweled.IsJeweledVert)
{
if ((um = AdjacentCell(cell, Position.Up)) != null)
{
ProcessJewel(um, jeweled, removingSpecialJewelCells, marker);
}
if ((lm = AdjacentCell(cell, Position.Down)) != null)
{
ProcessJewel(lm, jeweled, removingSpecialJewelCells, marker);
}
}
if (jeweled.IsJeweledHorz)
{
if ((ml = AdjacentCell(cell, Position.Left)) != null)
{
ProcessJewel(ml, jeweled, removingSpecialJewelCells, marker);
}
if ((mr = AdjacentCell(cell, Position.Right)) != null)
{
ProcessJewel(mr, jeweled, removingSpecialJewelCells, marker);
}
}
}
}