public SupportArea Overlap(SupportArea that)
{
Debug.Assert(this.Overlaps(that)); // In particular, on same sheet
return(new SupportArea(sheet,
this.colInt.Meet(that.colInt),
this.rowInt.Meet(that.rowInt)));
}
public override void ForEachSupported(Action <Sheet, int, int> act)
{
if (IdempotentForeach && this.Count > alreadyVisited.Count + 1)
{
for (int i = 0; i < alreadyVisited.Count; i++)
{
SupportArea old = alreadyVisited[i];
if (this.Overlaps(old))
{
SupportArea overlap = this.Overlap(old);
if (overlap.Count == this.Count) // contained in old
{
return;
}
else if (overlap.Count == old.Count) // contains old
{
alreadyVisited[i] = this;
ForEachExcept(overlap, act);
return;
}
else if (this.colInt.Equals(old.colInt) && this.rowInt.Overlaps(old.rowInt))
{
alreadyVisited[i] = new SupportArea(sheet, this.colInt, this.rowInt.Join(old.rowInt));
ForEachExcept(overlap, act);
return;
}
else if (this.rowInt.Equals(old.rowInt) && this.colInt.Overlaps(old.colInt))
{
alreadyVisited[i] = new SupportArea(sheet, this.colInt.Join(old.colInt), this.rowInt);
ForEachExcept(overlap, act);
return;
}
else // overlaps, but neither containment nor rectangular union
{
alreadyVisited.Add(this);
ForEachExcept(overlap, act);
return;
}
}
}
// Large enough but no existing support set overlaps this one
alreadyVisited.Add(this);
}
ForEachInArea(sheet, colInt, rowInt, act);
}
private void ForEachExcept(SupportArea overlap, Action <Sheet, int, int> act)
{
if (rowInt.min < overlap.rowInt.min) // North non-empty, columns above overlap
{
ForEachInArea(sheet, overlap.colInt, new Interval(rowInt.min, overlap.rowInt.min - 1), act);
}
if (overlap.rowInt.max < rowInt.max) // South non-empty, columns below overlap
{
ForEachInArea(sheet, overlap.colInt, new Interval(overlap.rowInt.max + 1, rowInt.max), act);
}
if (colInt.min < overlap.colInt.min) // West non-empty, rows left of overlap
{
ForEachInArea(sheet, new Interval(colInt.min, overlap.colInt.min - 1), rowInt, act);
}
if (overlap.colInt.max < colInt.max) // East non-empty, rows right of overlap
{
ForEachInArea(sheet, new Interval(overlap.colInt.max + 1, colInt.max), rowInt, act);
}
}
public override void ForEachSupported(Action<Sheet, int, int> act) {
if (IdempotentForeach && this.Count > alreadyVisited.Count + 1) {
for (int i = 0; i < alreadyVisited.Count; i++) {
SupportArea old = alreadyVisited[i];
if (this.Overlaps(old)) {
SupportArea overlap = this.Overlap(old);
if (overlap.Count == this.Count) { // contained in old
return;
}
else if (overlap.Count == old.Count) { // contains old
alreadyVisited[i] = this;
ForEachExcept(overlap, act);
return;
}
else if (this.colInt.Equals(old.colInt) && this.rowInt.Overlaps(old.rowInt)) {
alreadyVisited[i] = new SupportArea(sheet, this.colInt, this.rowInt.Join(old.rowInt));
ForEachExcept(overlap, act);
return;
}
else if (this.rowInt.Equals(old.rowInt) && this.colInt.Overlaps(old.colInt)) {
alreadyVisited[i] = new SupportArea(sheet, this.colInt.Join(old.colInt), this.rowInt);
ForEachExcept(overlap, act);
return;
}
else { // overlaps, but neither containment nor rectangular union
alreadyVisited.Add(this);
ForEachExcept(overlap, act);
return;
}
}
}
// Large enough but no existing support set overlaps this one
alreadyVisited.Add(this);
}
ForEachInArea(sheet, colInt, rowInt, act);
}
private void ForEachExcept(SupportArea overlap, Action<Sheet, int, int> act) {
if (rowInt.min < overlap.rowInt.min) // North non-empty, columns above overlap
{
ForEachInArea(sheet, overlap.colInt, new Interval(rowInt.min, overlap.rowInt.min - 1), act);
}
if (overlap.rowInt.max < rowInt.max) // South non-empty, columns below overlap
{
ForEachInArea(sheet, overlap.colInt, new Interval(overlap.rowInt.max + 1, rowInt.max), act);
}
if (colInt.min < overlap.colInt.min) // West non-empty, rows left of overlap
{
ForEachInArea(sheet, new Interval(colInt.min, overlap.colInt.min - 1), rowInt, act);
}
if (overlap.colInt.max < colInt.max) // East non-empty, rows right of overlap
{
ForEachInArea(sheet, new Interval(overlap.colInt.max + 1, colInt.max), rowInt, act);
}
}
public SupportArea Overlap(SupportArea that) {
Debug.Assert(this.Overlaps(that)); // In particular, on same sheet
return new SupportArea(sheet,
this.colInt.Meet(that.colInt),
this.rowInt.Meet(that.rowInt));
}
public bool Overlaps(SupportArea that) {
return this.sheet == that.sheet
&& this.colInt.Overlaps(that.colInt) && this.rowInt.Overlaps(that.rowInt);
}
public bool Overlaps(SupportArea that)
{
return(this.sheet == that.sheet &&
this.colInt.Overlaps(that.colInt) && this.rowInt.Overlaps(that.rowInt));
}