/// <summary>
/// Resolves parentheses and adds ".call" to direct function calls on variables.
/// </summary>
private string ResolveParentheses(string exp)
{
if (exp.Contains("(") && exp.Contains(")"))
{
int index = 0;
int depth = 0;
int parenthesesStartIndex = -1;
StringBuilder newExpression = new StringBuilder();
StringEscapeHelper escaper = new LeftToRightStringEscapeHelper(exp, 0);
while (index < exp.Length)
{
char t = exp[index];
escaper.CheckStartAt(index);
if (!escaper.IsString)
{
if (t == '{' || t == '[')
{
depth++;
if (parenthesesStartIndex == -1)
newExpression.Append(t);
}
else if (t == '}' || t == ']')
{
depth--;
if (parenthesesStartIndex == -1)
newExpression.Append(t);
}
else if (t == '(')
{
if (depth == 0 && parenthesesStartIndex == -1)
{
ElementCapture capture = CaptureLeft(newExpression.ToString(), newExpression.Length - 1);
string identifier = capture.Identifier;
if (capture.Depth == 0 || identifier == "")
{
if (identifier.Length == 0)
{
parenthesesStartIndex = index;
}
else
{
string testExp = newExpression.ToString().Remove(capture.StartIndex).Trim();
if (testExp.Length > 0 && testExp.Last() == '.' || StatementProcessor.controlStatements.Contains(identifier) || identifier.StartsWith("new "))
{
newExpression.Append(t);
}
else
{
newExpression.Append(".call" + t);
}
depth++;
}
}
else
{
newExpression.Append(t);
depth++;
}
}
else
{
depth++;
if (parenthesesStartIndex == -1)
newExpression.Append(t);
}
}
else if (t == ')')
{
if (depth == 0 && parenthesesStartIndex > -1)
{
string parenthesesCode = exp.Substring(parenthesesStartIndex + 1, index - parenthesesStartIndex - 1);
if (parenthesesCode.Length > 0)
{
if (parenthesesCode.Contains("=>") && Regex.IsMatch(parenthesesCode, REGEX_LAMBDA))
{
newExpression.Append(BuildLambdaFunction(parenthesesCode));
}
else
{
var returnObject = ExecuteStatement(new ScriptStatement(parenthesesCode));
newExpression.Append(returnObject.ToScriptObject());
}
}
parenthesesStartIndex = -1;
}
else
{
depth--;
if (parenthesesStartIndex == -1)
newExpression.Append(t);
}
}
else
{
if (parenthesesStartIndex == -1)
newExpression.Append(t);
}
}
else
{
if (parenthesesStartIndex == -1)
newExpression.Append(t);
}
index++;
}
return newExpression.ToString();
}
return exp;
}
/// <summary>
/// Captures an element right from the starting index.
/// </summary>
private ElementCapture CaptureRight(string exp, int index)
{
if (string.IsNullOrWhiteSpace(exp))
return new ElementCapture() { Length = 0, StartIndex = 0, Identifier = "", Depth = 0 };
string identifier = "";
bool foundSeperatorChar = false;
int depth = 0;
StringEscapeHelper escaper = new LeftToRightStringEscapeHelper(exp, index);
while (index < exp.Length && !foundSeperatorChar)
{
char t = exp[index];
escaper.CheckStartAt(index);
if (!escaper.IsString)
{
if (t == ')' || t == ']' || t == '}')
{
depth--;
}
else if (t == '(' || t == '[' || t == '{')
{
depth++;
}
}
if (t == '-' && string.IsNullOrWhiteSpace(identifier))
{
identifier += "-";
}
else
{
if (!escaper.IsString && depth == 0)
{
if (t == '.')
{
// Check if the '.' is not a decimal seperator:
if (!Regex.IsMatch(identifier.Trim(), REGEX_NUMLEFTDOT))
{
foundSeperatorChar = true;
}
}
else if (IDENTIFIER_SEPERATORS.Contains(t))
{
foundSeperatorChar = true;
}
}
// Append the char to the identifier:
if (!foundSeperatorChar)
{
identifier += t;
}
}
index++;
}
if (foundSeperatorChar)
return new ElementCapture() { StartIndex = index - 1 - identifier.Length, Length = identifier.Length, Identifier = identifier.Trim(), Depth = depth };
else
return new ElementCapture() { StartIndex = index - identifier.Length, Length = identifier.Length, Identifier = identifier.Trim(), Depth = depth };
}
/// <summary>
/// Returns positions of the given operator in the expression, sorted from left to right.
/// </summary>
private int[] GetOperatorPositions(string exp, string op)
{
List<int> operators = new List<int>();
StringEscapeHelper escaper = new LeftToRightStringEscapeHelper(exp, 0);
int depth = 0;
int index = 0;
while (index < exp.Length)
{
char t = exp[index];
escaper.CheckStartAt(index);
if (!escaper.IsString)
{
if (t == '(' || t == '[' || t == '{')
{
depth--;
}
else if (t == ')' || t == ']' || t == '}')
{
depth++;
}
if (t == op[0] && depth == 0)
{
if (op.Length > 1 && index + op.Length - 1 < exp.Length)
{
bool correctOperator = true;
for (int i = 1; i < op.Length; i++)
{
if (exp[index + i] != op[i])
correctOperator = false;
}
if (correctOperator)
operators.Add(index);
}
else if (op.Length == 1)
{
operators.Add(index);
}
}
}
index++;
}
return operators.ToArray();
}