public override bool TryCreate(string pattern, FormulaBuilder builder, out FormulaItem item)
{
item = null;
FunctionInfo functionInfo = FormulaBuilderTools.Instance.GetFunctionElements(pattern);
if (!functionInfo.IsOK)
{
return(false);
}
string functionName = functionInfo.Name;
if (!_functions.Keys.Contains(functionName))
{
return(false);
}
Type functionType = _functions[functionName];
item = (FunctionItem)Activator.CreateInstance(functionType);
item.Pattern = pattern;
string[] args = functionInfo.Arguments.Split(FUNCTION_ARGUMENT_SEPARATOR);
foreach (string arg in args)
{
FormulaItem argItem = builder.Create(arg);
(item as FunctionItem).Arguments.Add(argItem);
}
return(true);
}
public override bool TryCreate(string pattern, FormulaBuilder builder, out FormulaItem item)
{
item = null;
List <string> elements = FormulaBuilderTools.Instance.GetElements(pattern, OperationType.Power);
if (elements.Count != 3 || elements[1] != "^")
{
return(false);
}
FormulaItem baseItem = builder.Create(elements[0]);
FormulaItem exponentItem = builder.Create(elements[2]);
item = new FunctionPow();
item.Pattern = pattern;
(item as FunctionItem).Arguments.Add(baseItem);
(item as FunctionItem).Arguments.Add(exponentItem);
return(true);
}
private void onFormulaChanged(object sender, EventArgs e)
{
if (!checkBox1.Checked)
{
return;
}
try {
string pattern = textBox1.Text;
FormulaItem formula = _builder.Create(pattern);
double value = formula.GetValue();
textBox2.Text = value.ToString();
_element = _converter.Convert(formula);
updateTree(formula);
panel1.Invalidate();
} catch (Exception exc) {
textBox2.Text = "[ERROR]";
_element = null;
}
}
public override bool TryCreate(string pattern, FormulaBuilder builder, out FormulaItem item)
{
item = null;
string trimmed = pattern.Trim();
bool isMatchRound = Regex.IsMatch(trimmed, REGEX_ROUND);
bool isMatchSquared = Regex.IsMatch(trimmed, REGEX_SQUARED);
bool isAnyMatch = isMatchRound || isMatchSquared;
if (!isAnyMatch)
{
return(false);
}
item = new BracketItem();
item.Pattern = pattern;
string args = null;
if (isMatchRound)
{
args = RegexTools.GetValue(pattern, REGEX_ROUND, "args");
}
if (isMatchSquared)
{
args = RegexTools.GetValue(pattern, REGEX_SQUARED, "args");
}
FormulaItem argsItem = builder.Create(args);
(item as BracketItem).Arguments.Add(argsItem);
if (isMatchRound)
{
(item as BracketItem).TypeOfBracket = BracketShapeType.Round;
}
if (isMatchSquared)
{
(item as BracketItem).TypeOfBracket = BracketShapeType.Squared;
}
return(true);
}
public override bool TryCreate(string pattern, FormulaBuilder builder, out FormulaItem item)
{
item = null;
pattern = pattern.Trim();
string args = RegexTools.GetValue(pattern, REGEX, "args");
if (string.IsNullOrEmpty(args))
{
return(false);
}
item = new FunctionAbs();
item.Pattern = pattern;
FormulaItem arg = builder.Create(args);
(item as FunctionAbs).Arguments.Add(arg);
return(true);
}
public override bool TryCreate(string pattern, FormulaBuilder builder, out FormulaItem item)
{
item = null;
List <string> elements = FormulaBuilderTools.Instance.GetElements(pattern, OperationType.AddSubstr);
if (elements.Count < 3)
{
return(false);
}
item = new FunctionSum();
item.Pattern = pattern;
for (int i = 0; i < elements.Count; ++i)
{
string element = elements[i];
if (element == "+" || element == "-")
{
continue;
}
double coeff = 1.0;
if (i > 0)
{
coeff = (elements[i - 1] == "+") ? 1.0 : -1.0;
}
FormulaItem arg = builder.Create(element);
(item as FunctionSum).Arguments.Add(arg);
(item as FunctionSum).Coeffs.Add(coeff);
}
return(true);
}
public override bool TryCreate(string pattern, FormulaBuilder builder, out FormulaItem item)
{
item = null;
List <string> elements = FormulaBuilderTools.Instance.GetElements(pattern, OperationType.MultiDivide);
if (elements.Count < 3)
{
return(false);
}
item = new FunctionMultiply();
item.Pattern = pattern;
for (int i = 0; i < elements.Count; ++i)
{
string element = elements[i];
if (element == "*" || element == "/")
{
continue;
}
bool coeff = true;
if (i > 0)
{
coeff = (elements[i - 1] == "*") ? true : false;
}
FormulaItem arg = builder.Create(element);
(item as FunctionMultiply).Arguments.Add(arg);
(item as FunctionMultiply).Flags.Add(coeff);
}
return(true);
}
public override bool TryCreate(List <string> lines, CalculationBuilder builder, out CalculationItem item)
{
string pattern = lines.First();
bool isMatch = Regex.IsMatch(pattern, REGEX_PATTERN);
if (!isMatch)
{
FormulaItem supposedFormula = _formulaBuilder.Create(pattern);
if (supposedFormula is ValueItem)
{
Equation iEquation = new Equation();
iEquation.Value = (ValueItem)supposedFormula;
item = iEquation;
builder.RemoveLines(lines, 1);
return(true);
}
if (supposedFormula is SymbolItem)
{
Equation iEquation = new Equation();
iEquation.Symbol = (SymbolItem)supposedFormula;
item = iEquation;
builder.RemoveLines(lines, 1);
return(true);
}
item = null;
return(false);
}
string left = RegexTools.GetValue(pattern, REGEX_PATTERN, "left");
string right = RegexTools.GetValue(pattern, REGEX_PATTERN, "right");
FormulaItem symbol = _formulaBuilder.Create(left);
FormulaItem formula = _formulaBuilder.Create(right);
Equation equation = new Equation();
equation.Symbol = (SymbolItem)symbol;
if (formula is ValueItem)
{
equation.Value = (ValueItem)formula;
}
else
{
if (formula.IsSymbol)
{
equation.Symbolic = formula;
}
else
{
equation.Numbers = formula;
}
}
item = equation;
builder.RemoveLines(lines, 1);
return(true);
}
