/// <summary>
/// Checks if this patch can skip the transition if it is connected to
/// StepType.Pass with a upper BranchType.
/// </summary>
private static bool CheckPossibleTransitionSkip(Sfc2dEditorControl control, PatchEntity sourcePatch)
{
if (sourcePatch.ContainsTransition())
{
return(false);
}
if (sourcePatch.ContainsRealStep())
{
PatchEntity leftPatch = control.Data.SfcEntity.Lookup(sourcePatch.X - 1, sourcePatch.Y);
if (HasUpperBranchConnection(sourcePatch, leftPatch))
{
return(false);
}
if (HasLowerBranchConnection(sourcePatch, leftPatch))
{
return(false);
}
return(FindUpperBranchConnectionsThroughPasses(control, sourcePatch));
}
else if (sourcePatch.SfcStepType == StepType.Pass)
{
PatchEntity leftPatch = control.Data.SfcEntity.Lookup(sourcePatch.X - 1, sourcePatch.Y);
return(!HasUpperBranchConnection(sourcePatch, leftPatch));
}
return(false);
}
/// <summary>
/// Visualises the active or inactive status of the steps.
/// </summary>
public void VisualiseStatus(Sfc2dEditorControl sfc2dEditorControl)
{
foreach (var SfcStep in Plc.SfcProgramData.ActiveSteps)
{
sfc2dEditorControl.MarkStep(SfcStep.Id, true);
}
foreach (var SfcStep in Plc.SfcProgramData.InactiveSteps)
{
sfc2dEditorControl.MarkStep(SfcStep.Id, false);
}
}
/// <summary>
/// Traverses down along passes and tries to find a patch with upper connections but without lower ones.
/// </summary>
private static bool FindUpperBranchConnectionsThroughPasses(Sfc2dEditorControl control, PatchEntity currentPatch)
{
PatchEntity lowerPatch = control.Data.SfcEntity.Lookup(currentPatch.X, currentPatch.Y + 1);
bool hasLowerTransitionStep = lowerPatch != null && lowerPatch.SfcStepType == StepType.Pass;
if (!hasLowerTransitionStep)
{
return(false);
}
PatchEntity leftPatch = control.Data.SfcEntity.Lookup(lowerPatch.X - 1, lowerPatch.Y);
if (HasUpperBranchConnection(lowerPatch, leftPatch))
{
return(true);
}
if (HasLowerBranchConnection(lowerPatch, leftPatch))
{
return(false);
}
return(FindUpperBranchConnectionsThroughPasses(control, lowerPatch));
}
