private static Point?EscapeProcessI(CoverSet coverSet, Point Z, ConnectorSegment escapeLine, Orientation orientation, Size margin)
{
List <DistanceFromPoint> extremitiesList = new List <DistanceFromPoint>(4);
ConnectorSegment cover = coverSet.GetCover(Z, (orientation == Orientation.Horizontal) ? DesignerEdges.Left : DesignerEdges.Bottom);
if (cover != null)
{
AddBoundPoint(ref extremitiesList, cover.A, cover, Z);
AddBoundPoint(ref extremitiesList, cover.B, cover, Z);
}
ConnectorSegment segment = coverSet.GetCover(Z, (orientation == Orientation.Horizontal) ? DesignerEdges.Right : DesignerEdges.Top);
if (segment != null)
{
AddBoundPoint(ref extremitiesList, segment.A, segment, Z);
AddBoundPoint(ref extremitiesList, segment.B, segment, Z);
}
if (extremitiesList.Count != 0)
{
DistanceSorter.Sort(ref extremitiesList);
for (int i = 0; i < extremitiesList.Count; i++)
{
DesignerEdges edges;
Point point3;
Point p = extremitiesList[i].P;
int x = Math.Sign((int)(p.X - Z.X));
Point point2 = new Point(x, Math.Sign((int)(p.Y - Z.Y)));
if (((orientation == Orientation.Vertical) ? point2.X : point2.Y) == 0)
{
p = extremitiesList[i].ConnectorSegment.ExtendPointOutwards(p);
int introduced13 = Math.Sign((int)(p.X - Z.X));
point2 = new Point(introduced13, Math.Sign((int)(p.Y - Z.Y)));
p = extremitiesList[i].P;
}
if (orientation == Orientation.Vertical)
{
edges = (point2.Y < 0) ? DesignerEdges.Bottom : DesignerEdges.Top;
}
else
{
edges = (point2.X < 0) ? DesignerEdges.Left : DesignerEdges.Right;
}
if (orientation == Orientation.Vertical)
{
point3 = new Point(p.X + (point2.X * margin.Width), Z.Y);
}
else
{
point3 = new Point(Z.X, p.Y + (point2.Y * margin.Height));
}
ConnectorSegment segment4 = new ConnectorSegment(Z, point3);
if (((!coverSet.EscapeLineHasBeenUsed(segment4, point3) && escapeLine.IsPointOnSegment(point3)) && ((escapeLine.A != point3) && (escapeLine.B != point3))) && coverSet.IsEscapePoint(Z, point3, edges))
{
coverSet.AddUsedEscapeLine(segment4);
return(new Point?(point3));
}
}
}
return(null);
}
private static Point?EscapeAlgorithm(CoverSet coverSet, Point Z, Point targetPoint, ref List <Point> LeA, ref List <ConnectorSegment> LhA, ref List <ConnectorSegment> LvA, ref List <ConnectorSegment> LhB, ref List <ConnectorSegment> LvB, ref Orientation orientationA, out ConnectorSegment intersectionSegmentA, out ConnectorSegment intersectionSegmentB, Size margin, ref bool noEscapeA)
{
bool flag2;
bool flag3;
bool flag4;
bool flag5;
Point?nullable = null;
intersectionSegmentA = null;
intersectionSegmentB = null;
ConnectorSegment cover = coverSet.GetCover(Z, DesignerEdges.Left);
ConnectorSegment segment2 = coverSet.GetCover(Z, DesignerEdges.Right);
ConnectorSegment segment3 = coverSet.GetCover(Z, DesignerEdges.Bottom);
ConnectorSegment segment4 = coverSet.GetCover(Z, DesignerEdges.Top);
ConnectorSegment item = ConnectorSegment.SegmentFromLeftToRightCover(coverSet, Z);
LhA.Add(item);
ConnectorSegment segment6 = ConnectorSegment.SegmentFromBottomToTopCover(coverSet, Z);
LvA.Add(segment6);
for (int i = 0; i < LvB.Count; i++)
{
ConnectorSegment segment = LvB[i];
nullable = item.Intersect(segment);
if (nullable.HasValue)
{
intersectionSegmentA = item;
intersectionSegmentB = segment;
return(nullable);
}
}
for (int j = 0; j < LhB.Count; j++)
{
ConnectorSegment segment8 = LhB[j];
nullable = segment6.Intersect(segment8);
if (nullable.HasValue)
{
intersectionSegmentA = segment6;
intersectionSegmentB = segment8;
return(nullable);
}
}
Point?nullable2 = EscapeProcessI(coverSet, Z, segment6, Orientation.Horizontal, margin);
if (nullable2.HasValue)
{
orientationA = Orientation.Vertical;
LeA.Add(nullable2.Value);
return(null);
}
nullable2 = EscapeProcessI(coverSet, Z, item, Orientation.Vertical, margin);
if (nullable2.HasValue)
{
orientationA = Orientation.Horizontal;
LeA.Add(nullable2.Value);
return(null);
}
bool intersectionFlag = false;
Point empty = Point.Empty;
Point r = Point.Empty;
Point point3 = Point.Empty;
Point point4 = Point.Empty;
if (segment4 != null)
{
empty = new Point(Z.X, segment4.A.Y);
}
if (segment2 != null)
{
r = new Point(segment2.A.X, Z.Y);
}
if (segment3 != null)
{
point3 = new Point(Z.X, segment3.A.Y);
}
if (cover != null)
{
point4 = new Point(cover.A.X, Z.Y);
}
do
{
flag2 = flag3 = flag4 = flag5 = false;
if (segment4 != null)
{
empty.Y -= margin.Height;
if (empty.Y > Z.Y)
{
flag2 = true;
Point?nullable3 = EscapeProcessII(coverSet, Orientation.Vertical, ref LeA, ref LhA, ref LvA, ref LhB, ref LvB, Z, empty, margin, out intersectionFlag, out intersectionSegmentA, out intersectionSegmentB);
if (nullable3.HasValue)
{
LvA.Add(segment6);
if (intersectionFlag)
{
return(nullable3);
}
orientationA = Orientation.Horizontal;
coverSet.AddUsedEscapeLine(new ConnectorSegment(Z, empty));
coverSet.AddUsedEscapeLine(new ConnectorSegment(empty, nullable3.Value));
LeA.Add(nullable3.Value);
return(null);
}
}
}
if (segment2 != null)
{
r.X -= margin.Width;
if (r.X > Z.X)
{
flag3 = true;
Point?nullable4 = EscapeProcessII(coverSet, Orientation.Horizontal, ref LeA, ref LhA, ref LvA, ref LhB, ref LvB, Z, r, margin, out intersectionFlag, out intersectionSegmentA, out intersectionSegmentB);
if (nullable4.HasValue)
{
LhA.Add(item);
if (intersectionFlag)
{
return(nullable4);
}
orientationA = Orientation.Vertical;
coverSet.AddUsedEscapeLine(new ConnectorSegment(Z, r));
coverSet.AddUsedEscapeLine(new ConnectorSegment(r, nullable4.Value));
LeA.Add(nullable4.Value);
return(null);
}
}
}
if (segment3 != null)
{
point3.Y += margin.Height;
if (point3.Y < Z.Y)
{
flag4 = true;
Point?nullable5 = EscapeProcessII(coverSet, Orientation.Vertical, ref LeA, ref LhA, ref LvA, ref LhB, ref LvB, Z, point3, margin, out intersectionFlag, out intersectionSegmentA, out intersectionSegmentB);
if (nullable5.HasValue)
{
LvA.Add(segment6);
if (intersectionFlag)
{
return(nullable5);
}
orientationA = Orientation.Horizontal;
coverSet.AddUsedEscapeLine(new ConnectorSegment(Z, point3));
coverSet.AddUsedEscapeLine(new ConnectorSegment(point3, nullable5.Value));
LeA.Add(nullable5.Value);
return(null);
}
}
}
if (cover != null)
{
point4.X += margin.Width;
if (point4.X < Z.X)
{
flag5 = true;
Point?nullable6 = EscapeProcessII(coverSet, Orientation.Horizontal, ref LeA, ref LhA, ref LvA, ref LhB, ref LvB, Z, point4, margin, out intersectionFlag, out intersectionSegmentA, out intersectionSegmentB);
if (nullable6.HasValue)
{
LhA.Add(item);
if (intersectionFlag)
{
return(nullable6);
}
orientationA = Orientation.Vertical;
coverSet.AddUsedEscapeLine(new ConnectorSegment(Z, point4));
coverSet.AddUsedEscapeLine(new ConnectorSegment(point4, nullable6.Value));
LeA.Add(nullable6.Value);
return(null);
}
}
}
}while ((flag2 || flag3) || (flag4 || flag5));
noEscapeA = true;
return(null);
}
