public void LoadXML(Stream xmls)
{
XmlDocument xmld = new XmlDocument();
xmld.Load(xmls);
foreach (XmlNode cells in xmld.GetElementsByTagName("cell"))
{
SheetCell curCell = null;
string curText = null;
uint curBG = 0xFFFFFFFF;
foreach (XmlNode cell in cells.ChildNodes)
{
if (cell.Name == "id")
{
curCell = Name2Cell(cell.InnerText);
}
else if (cell.Name == "bg")
{
curBG = Convert.ToUInt32(cell.InnerText, 16);
}
else if (cell.Name == "text")
{
curText = cell.InnerText;
}
}
if (curCell != null)
{
curCell.BGColor = curBG;
curCell.Text = curText;
}
}
}
private bool ContainsCircularRefRec(SheetCell cell, HashSet <SheetCell> curChain)
{
if (curChain.Contains(cell))
{
return(true);
}
if (Refs.ContainsKey(cell) && Refs[cell].Count > 0)
{
curChain.Add(cell);
foreach (var cellRef in Refs[cell])
{
// create a duplicate HashSet for every new possible walk on the graph of cells.
// this is so that cells that reference multiple values that don't contain
// crefs wont cause false positives
if (ContainsCircularRefRec(cellRef, new HashSet <SheetCell>(curChain)))
{
return(true);
}
}
}
return(false);
}
// check to see if a circ reference occurs if the parent were to add
// the cell as a dependant
private bool ContainsCircularRef(SheetCell cell, SheetCell parent)
{
var cellChain = new HashSet <SheetCell>();
cellChain.Add(parent);
return(ContainsCircularRefRec(cell, cellChain));
}
public Spreadsheet(int numRows, int numCols)
{
RowCount = numRows;
ColumnCount = numCols;
Cells = new SheetCell[numRows, numCols];
// initialize each cell in the spreadsheet and handle the PropertyChanged
// event for each one
for (int r = 0; r < numRows; r++)
{
for (int c = 0; c < numCols; c++)
{
Cells[r, c] = new SheetCell(r, c);
Cells[r, c].PropertyChanged += CellChanged;
}
}
}
private void UpdateRefs(SheetCell cell)
{
if (!Refs.ContainsKey(cell))
{
return;
}
// recompute the values and update Vars dict
foreach (var refCell in Refs[cell])
{
if (refCell.InvalidExp)
{
continue;
}
var res = refCell.ETree.Eval();
Vars[refCell.Name] = res;
refCell.SetValue(res.ToString());
CellPropertyChanged(refCell, new PropertyChangedEventArgs("Value"));
// recursively update ref ref calls etc
UpdateRefs(refCell);
}
}
