private static void UncoverColumn(ColumnObject c)
{
for (var i = c.Up; i != c; i = i.Up)
{
for (var j = i.Left; j != i; j = j.Left)
{
j.ListHeader.RelinkDataObject(j);
}
}
c.RelinkColumnHeader();
}
private static void CoverColumn(ColumnObject c)
{
c.UnlinkColumnHeader();
for (var i = c.Down; i != c; i = i.Down)
{
for (var j = i.Right; j != i; j = j.Right)
{
j.ListHeader.UnlinkDataObject(j);
}
}
}
private static ColumnObject ChooseColumnWithLeastRows(ColumnObject root)
{
ColumnObject chosenColumn = null;
for (var columnHeader = root.NextColumnObject; columnHeader != root; columnHeader = columnHeader.NextColumnObject)
{
if (chosenColumn == null || columnHeader.NumberOfRows < chosenColumn.NumberOfRows)
{
chosenColumn = columnHeader;
}
}
return(chosenColumn);
}
private static bool MatrixIsEmpty(ColumnObject root)
{
return(root.NextColumnObject == root);
}
private static ColumnObject BuildInternalStructure <TData, TRow, TCol>(
TData data,
Func <TData, IEnumerable <TRow> > iterateRows,
Func <TRow, IEnumerable <TCol> > iterateCols,
Func <TCol, bool> predicate,
int?numPrimaryColumns = null)
{
var root = new ColumnObject();
int?numColumns = null;
var rowIndex = 0;
var colIndexToListHeader = new Dictionary <int, ColumnObject>();
foreach (var row in iterateRows(data))
{
DataObject firstDataObjectInThisRow = null;
var localRowIndex = rowIndex;
var colIndex = 0;
foreach (var col in iterateCols(row))
{
if (localRowIndex == 0)
{
var listHeader = new ColumnObject();
var isPrimaryColumn = !numPrimaryColumns.HasValue || colIndex < numPrimaryColumns.Value;
if (isPrimaryColumn)
{
root.AppendColumnHeader(listHeader);
}
colIndexToListHeader[colIndex] = listHeader;
}
if (predicate(col))
{
var listHeader = colIndexToListHeader[colIndex];
var dataObject = new DataObject(listHeader, localRowIndex);
if (firstDataObjectInThisRow != null)
{
firstDataObjectInThisRow.AppendToRow(dataObject);
}
else
{
firstDataObjectInThisRow = dataObject;
}
}
colIndex++;
}
if (numColumns.HasValue)
{
if (colIndex != numColumns)
{
throw new ArgumentException("All rows must contain the same number of columns", nameof(data));
}
}
else
{
numColumns = colIndex;
}
rowIndex++;
}
return(root);
}
public SearchData(ColumnObject root)
{
Root = root;
}