// Returns a set of @this which depends on any state in @states.
// In addition, @rest will contain the inverse set (i.e. everyting in
// @this which did _not_ depend on any state in @states).
public DependencyFilter DependsOn(IEnumerable <State> states)
{
DependencyFilter ret = (d_filter ? this : new DependencyFilter(d_graph, this));
ret.d_not = null;
// Check for each state if it depends on a state in states. If so, it should
// be in the result set, if not it should be in the rest set
ret.RemoveWhere((s) => {
bool doesdepend = false;
foreach (State other in states)
{
if (d_graph.DependsOn(s, other.Object))
{
doesdepend = true;
break;
}
}
if (!doesdepend)
{
if (ret.d_not == null)
{
ret.d_not = new DependencyFilter(d_graph);
}
ret.d_not.Add(s);
}
return(!doesdepend);
});
return(ret);
}
public DependencyFilter DependencyOf(IEnumerable <State> states)
{
DependencyFilter ret = (d_filter ? this : new DependencyFilter(d_graph, this));
ret.d_not = null;
ret.RemoveWhere((s) => {
bool doesdepend = false;
foreach (State other in states)
{
if (d_graph.DependsOn(other, s.Object))
{
doesdepend = true;
break;
}
}
if (!doesdepend)
{
if (ret.d_not == null)
{
ret.d_not = new DependencyFilter(d_graph);
}
ret.d_not.Add(s);
}
return(!doesdepend);
});
return(ret);
}
public DependencyFilter Copy()
{
var ret = new DependencyFilter(d_graph, this);
if (d_not != null)
{
ret.d_not = d_not.Copy();
}
return(ret);
}
public DependencyFilter Not()
{
if (d_filter)
{
var n = d_not;
if (Count == 0)
{
d_not = null;
}
else
{
d_not = new DependencyFilter(d_graph, this);
}
Clear();
if (n != null)
{
UnionWith(n);
}
return(this);
}
else
{
if (d_not != null)
{
return(d_not);
}
else
{
return(new DependencyFilter(d_graph));
}
}
}