/// <summary>
/// If text is null, throws an ArgumentNullException.
///
/// Otherwise, if name is null or invalid, throws an InvalidNameException.
///
/// Otherwise, the contents of the named cell becomes text. The method returns a
/// list consisting of name plus the names of all other cells whose value depends,
/// directly or indirectly, on the named cell.
///
/// For example, if name is A1, B1 contains A1*2, and C1 contains B1+A1, the
/// list {A1, B1, C1} is returned.
/// </summary>
protected override IList <string> SetCellContents(string name, string text)
{
//Normalizes the name
String normalizedName = name;
//Creates a new Cell, with the name and text being passed
Cell c = new Cell(normalizedName, text);
//Sets the contents and value of the cell
c.SetContents(text);
c.SetValue(Lookup);
//If the dictionary contains the key name, then it goes here
if (dictionary.ContainsKey(normalizedName))
{
//Sets the value associated with the name in the dictionary with the new Cell
dictionary[normalizedName] = c;
//If the contents of the cell is empty, then it removes it from the dictionary
if ((string)c.GetContents() == "")
{
dictionary.Remove(normalizedName);
}
//Replaces the dependees of the name
graph.ReplaceDependees(normalizedName, new HashSet <string>());
}
else
{
//If the contents of the cell is not null, then it adds the cell to the dictionary
if ((string)c.GetContents() != "")
{
dictionary.Add(normalizedName, c);
}
//Replaces the dependees of the name
graph.ReplaceDependees(normalizedName, new HashSet <string>());
}
//Gets the orders of the cell recalculated and stores it into a list
List <string> recalculatedList = new List <string>(GetCellsToRecalculate(normalizedName));
//Recalculates the values of all the cells
RecalculateValues(recalculatedList);
//Sets changed to true
Changed = true;
//Returns the list of cells recalculated
return(recalculatedList);
}
/// <summary>
/// If name is null or invalid, throws an InvalidNameException.
///
/// Otherwise, the contents of the named cell becomes number. The method returns a
/// list consisting of name plus the names of all other cells whose value depends,
/// directly or indirectly, on the named cell.
///
/// For example, if name is A1, B1 contains A1*2, and C1 contains B1+A1, the
/// list {A1, B1, C1} is returned.
/// </summary>
protected override IList <string> SetCellContents(string name, double number)
{
//Normalizes the name
String normalizedName = Normalize(name);
//Creates a new cell, with the name and number being passed
Cell c = new Cell(normalizedName, number);
//Sets the contents of the cell with the number
c.SetContents(number);
//Sets the value of the cell which should be the number
c.SetValue(Lookup);
//If the dictionary contains the key name, then it goes here
if (dictionary.ContainsKey(normalizedName))
{
//Sets the value associated with the name in the dictionary with the new Cell
dictionary[normalizedName] = c;
//Replaces the dependees of the name, with a new HashSet
graph.ReplaceDependees(normalizedName, new HashSet <string>());
}
else
{
//Adds the cell to the dictionary
dictionary.Add(normalizedName, c);
//Replaces the dependees of the name, with a new HashSet
graph.ReplaceDependees(normalizedName, new HashSet <string>());
}
//Gets the orders of the cell recalculated and stores it into a list
List <string> recalculatedList = new List <string>(GetCellsToRecalculate(normalizedName));
//Recalculates the values of all the cells
RecalculateValues(recalculatedList);
//Sets changed to true
Changed = true;
//Returns the list of cells recalculated
return(recalculatedList);
}
/// <summary>
/// If the formula parameter is null, throws an ArgumentNullException.
///
/// Otherwise, if name is null or invalid, throws an InvalidNameException.
///
/// Otherwise, if changing the contents of the named cell to be the formula would cause a
/// circular dependency, throws a CircularException, and no change is made to the spreadsheet.
///
/// Otherwise, the contents of the named cell becomes formula. The method returns a
/// list consisting of name plus the names of all other cells whose value depends,
/// directly or indirectly, on the named cell.
///
/// For example, if name is A1, B1 contains A1*2, and C1 contains B1+A1, the
/// list {A1, B1, C1} is returned.
/// </summary>
protected override IList <string> SetCellContents(string name, Formula formula)
{
//Normalizes the name of the Cell
String normalizedName = Normalize(name);
//Creates a new Cell passing the name and formula
Cell c = new Cell(normalizedName, formula);
//Sets the contents of the cell with the formula
c.SetContents(formula);
//Sets the value of the Cell which should be a double if the formula is valid
//or a FormulaError if the formula is invalid
c.SetValue(Lookup);
//A boolean to keep track if a new Entry is made
bool newEntry = false;
//Gets the previous dependees of the cell before
HashSet <string> dependees = new HashSet <string>();
//A Cell to store the prevCell
Cell prevCell = null;
//If the dictionary contains the key name, then goes here
if (dictionary.ContainsKey(normalizedName))
{
//Gets the prevCell
prevCell = dictionary[normalizedName];
//Replaces it with the new cell
dictionary[normalizedName] = c;
//Gets the prevDependees of the graph
dependees = new HashSet <string>(graph.GetDependees(normalizedName));
//Replaces the dependees with the variables of the formula
graph.ReplaceDependees(normalizedName, formula.GetVariables());
}
else
{
//Adds the cell to the dictionary
dictionary.Add(normalizedName, c);
//Gets the prevDependees of the graph
dependees = new HashSet <string>(graph.GetDependees(normalizedName));
//Replaces the dependees with the variables of the formula
graph.ReplaceDependees(normalizedName, formula.GetVariables());
//Sets the newEntry boolean to true
newEntry = true;
}
//Creates a new list to be returned
List <string> recalculatedList;
try
{
//Gets the orders of the cell recalculated and stores it into a list
recalculatedList = new List <string>(GetCellsToRecalculate(normalizedName));
//Recalculates the values of all the cells
RecalculateValues(recalculatedList);
}
//Goes in here if we encounter a CircularException
catch (CircularException ce)
{
//If a new Cell was added, we remove it from the dictionary
if (newEntry == true)
{
dictionary.Remove(normalizedName);
}
//Otherwise, we revert the value set to the value before in the Cell
else
{
dictionary[normalizedName] = prevCell;
}
//Replace the dependees of the name to it's original form
graph.ReplaceDependees(normalizedName, dependees);
//Throws a CircularException
throw new CircularException();
}
//Sets changed to true
Changed = true;
//Returns the list of cells recalculated
return(recalculatedList);
}
