private static Position.Direction CharFits(char found, Position.Direction direction)
{
if (found == '+' || found == '#')
{
switch (direction)
{
case Position.Direction.North:
return Position.Direction.East | Position.Direction.West | Position.Direction.North;
case Position.Direction.East:
return Position.Direction.North | Position.Direction.East | Position.Direction.South;
case Position.Direction.South:
return Position.Direction.East | Position.Direction.West | Position.Direction.South;
case Position.Direction.West:
return Position.Direction.West | Position.Direction.North | Position.Direction.South;
default: return Position.Direction.None;
}
}
if (found == '|')
{
switch (direction)
{
case Position.Direction.North:
return Position.Direction.North;
case Position.Direction.South:
return Position.Direction.South;
default:
return Position.Direction.None;
}
}
if (found == '-')
{
switch (direction)
{
case Position.Direction.East:
return Position.Direction.East;
case Position.Direction.West:
return Position.Direction.West;
default:
return Position.Direction.None;
}
}
if (found >= 'a' && found <= 'z')
{
return direction;
}
if (found >= '0' && found <= '9')
{
return direction;
}
return Position.Direction.None;
}
/// <summary>
/// Add a node to the flow. Nodes may only be included once per flow
/// </summary>
/// <param name="newNode"></param>
public void AddNode(TaskNode newNode, Position position)
{
_nodes.Add(newNode);
if(String.IsNullOrEmpty(newNode.Name )) newNode.Name = "node " + _nodes.Count.ToString();
newNode.OwningFlow = this;
newNode.Position = position;
}
private static List<PositionedConnection> FindConnectionJoin(Position p, char[,] artChars)
{
List<PositionedConnection> result = new List<PositionedConnection>();
ExtractConnectionEndFor(p, artChars, Position.Direction.North, 'V', result);
ExtractConnectionEndFor(p, artChars, Position.Direction.South, '^', result);
ExtractConnectionEndFor(p, artChars, Position.Direction.West, '>', result);
ExtractConnectionEndFor(p, artChars, Position.Direction.East, '<', result);
return result;
}
public static IEnumerable<Position.Direction> GetContainedDirections(Position.Direction dir)
{
foreach (var possibleDir in Position.AllDirections)
{
if (possibleDir == Position.Direction.None) continue;
if((dir & possibleDir) == possibleDir) yield return possibleDir;
}
}
private static void ExtractConnectionEndFor(Position pos, char[,] artChars, Position.Direction dir, char pointerSymbol, List<PositionedConnection> pointers)
{
int difX = (dir == Position.Direction.East ? 1 : (dir == Position.Direction.West ? -1 : 0));
int difY = (dir == Position.Direction.South ? 1 : (dir == Position.Direction.North ? -1 : 0));
pos.x += difX; pos.y += difY;
if (pos.x < 0 || pos.y < 0 || pos.x >= artChars.GetLength(0) || pos.y >= artChars.GetLength(1))
{
return;
}
if (artChars[pos.x, pos.y] == pointerSymbol)
{
PositionedConnection newConn = new PositionedConnection() { tailDirection = dir };
newConn.track.Add(pos);
pointers.Add(newConn);
}
}