/// <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);
}
private static PatchEntity FindSimultaneousTransition(List <int> patches, SfcProgramData data)
{
PatchEntity transitionPatch = null;
foreach (int step in patches)
{
transitionPatch = data.SfcEntity.Lookup(step);
if (transitionPatch != null && transitionPatch.ContainsTransition())
{
break;
}
}
if (transitionPatch == null)
{
Godot.GD.PushError("It is not allowed wo have Simultaneous branches without one transition!");
}
return(transitionPatch);
}
/// <summary>
/// Collects all Simultaneous branches to merge from this step.
/// null if there is none.
/// </summary>
private static List <SfcTransition> CollectUpperSimultaneousMerge(int sourceId, ProgrammableLogicController pu)
{
List <int> collected = Collector.CollectHorizontal(sourceId, pu.SfcProgramData, BranchType.Double, true);
if (collected.Count <= 1)
{
PatchEntity currentPatch = pu.SfcProgramData.SfcEntity.Lookup(sourceId);
int lowerId = sourceId + 1;
PatchEntity lowerPatch = pu.SfcProgramData.SfcEntity.Lookup(lowerId);
if (!currentPatch.ContainsTransition() && lowerPatch != null && lowerPatch.SfcStepType == StepType.Pass)
{
return(CollectUpperSimultaneousMerge(lowerId, pu));
}
return(null);
}
PatchEntity transitionPatch = FindSimultaneousTransition(collected, pu.SfcProgramData);
List <SfcStep> connectedSteps = CollectConnectedSteps(collected, pu.SfcProgramData);
SfcTransition transition = CreateTransition(transitionPatch.Key, pu);
transition.DependingSteps = connectedSteps;
return(new List <SfcTransition> {
transition
});
}