/// <summary>
/// Collects all steps horizontally connected with the given targetType from sourceId
/// </summary>
public static List <int> CollectHorizontal(int sourceId, SfcProgramData data, BranchType targetType, bool upperBranch)
{
CollectorEntity entity = new CollectorEntity(data, targetType, upperBranch);
entity.CollectedSteps.Add(sourceId);
CollectLeftDependingSteps(sourceId, entity);
CollectRightDependingSteps(sourceId, entity);
return(entity.CollectedSteps);
}
/// <summary>
/// Looks for right depending steps.
/// </summary>
private static void CollectRightDependingSteps(int currentId, CollectorEntity entity)
{
PatchEntity step = entity.Data.SfcEntity.Lookup(currentId);
if ((entity.UpperBranch && step.UpperBranch == entity.TargetType) ||
(!entity.UpperBranch && step.LowerBranch == entity.TargetType))
{
int rightId = currentId + (1 << SfcEntity.XKeyShift);
if (entity.Data.SfcEntity.Lookup(rightId) != null)
{
entity.CollectedSteps.Add(rightId);
CollectRightDependingSteps(rightId, entity);
}
}
}
/// <summary>
/// Looks for left depending steps.
/// </summary>
private static void CollectLeftDependingSteps(int currentId, CollectorEntity entity)
{
int leftId = currentId - (1 << SfcEntity.XKeyShift);
PatchEntity leftStep = entity.Data.SfcEntity.Lookup(leftId);
if (leftStep != null)
{
if ((entity.UpperBranch && leftStep.UpperBranch == entity.TargetType) ||
(!entity.UpperBranch && leftStep.LowerBranch == entity.TargetType))
{
entity.CollectedSteps.Add(leftId);
CollectLeftDependingSteps(leftId, entity);
}
}
}
