public static Result Run(Window parent)
{
var dialog = new CombinationsPermutationsDialog { Owner = parent };
return dialog.ShowDialog() ? dialog.result : null;
}
void Command_Numeric_CombinationsPermutations(CombinationsPermutationsDialog.Result result)
{
if (Selections.Count != 1)
throw new Exception("Must have one selection.");
var output = new List<List<string>>();
var nums = new int[result.UseCount];
var used = new bool[result.ItemCount];
nums[0] = -1;
var onNum = 0;
while (true)
{
++nums[onNum];
if (nums[onNum] >= result.ItemCount)
{
--onNum;
if (onNum < 0)
break;
used[nums[onNum]] = false;
continue;
}
if ((!result.Repeat) && (used[nums[onNum]]))
continue;
used[nums[onNum]] = true;
++onNum;
if (onNum < result.UseCount)
{
if (result.Type == CombinationsPermutationsDialog.CombinationsPermutationsType.Combinations)
nums[onNum] = nums[onNum - 1] - 1;
else
nums[onNum] = -1;
}
else
{
output.Add(nums.Select(num => (num + 1).ToString()).ToList());
--onNum;
used[nums[onNum]] = false;
}
}
ReplaceSelections(string.Join("", output.Select(row => string.Join(" ", row) + Data.DefaultEnding)));
var start = Selections.Single().Start;
var sels = new List<Range>();
foreach (var row in output)
{
foreach (var str in row)
{
sels.Add(Range.FromIndex(start, str.Length));
start += str.Length + 1; // +1 is for space
}
start += Data.DefaultEnding.Length - 1; // -1 is for space added before
}
Selections.Replace(sels);
}