public void MakeGrid(ILineReader lineReader)
{
var(row, col) = LineParser.GetSize(lineReader.GetNextLine());
if (row == 0 || col == 0)
{
throw new InvalidInputException("Cannot make a 0x0 grid!");
}
CurrentGrid = new Grid(row, col);
for (var currentRow = 0; currentRow < row; currentRow++)
{
var line = lineReader.GetNextLine();
var parsedLine = LineParser.GetGridRow(line);
for (var currentCol = 0; currentCol < col; currentCol++)
{
var cell = parsedLine[currentCol];
CurrentGrid.SetCell(currentRow, currentCol, cell);
}
}
}
public void ScanRuleSet()
{
string parent = null;
string line = null;
string lineTrimed;
Stack <string> parentStack = new Stack <string>();
int previousWhitespace = 0;
int lineNumber = 0;
while ((line = lineReader.GetNextLine()) != null)
{
line = Regex.Replace(line, "\\s*(if)*\\s*$", ""); // it trims off whitespace including 'if' at the end of each line due to it could effect on calculating indentation
lineTrimed = line.Trim();
int currentWhitespace = 0;
lineNumber++;
// check the line
// is it empty?
if (line.Length == 0)
{
parentStack.Clear();
}
else if (line.Trim().Substring(0, 2).Equals("//"))
{
//this els if statement is to handle commenting in new line only
// handling commenting in rule text file needs enhancement later
}
// does it begin with a white space?
else if (Char.IsWhiteSpace(line.ToCharArray()[0]))
{
currentWhitespace = line.Length - lineTrimed.Length; // calculating indentation level
if (lineTrimed.Length == 0) // is it a blank line?
{
// blank line - no parent
parent = null;
}
else
{
int indentationDifference = previousWhitespace - currentWhitespace;
if (indentationDifference == -4) // this condition is for handling inputs from ACE text editor
{
indentationDifference = -1;
}
if (indentationDifference == 0 || indentationDifference > 0) //current line is at same level as previous line || current line is in upper level than previous line
{
parentStack = HandlingStackPop(parentStack, indentationDifference);
}
else if (indentationDifference < -1) // current line is not a direct child of previous line hence the format is invalid
{
//need to handle error
scanFeeder.HandleWarning(lineTrimed);
break;
}
parent = parentStack.Peek();
string tempLineTrimed = Regex.Replace(lineTrimed.Trim(), "^(OR\\s?|AND\\s?)?(MANDATORY|OPTIONALLY|POSSIBLY)?(\\s?NOT|\\s?KNOWN)*(NEEDS|WANTS)?", "").Trim();
string tempFirstKeywordsGroup = Regex.Replace(lineTrimed.Trim(), tempLineTrimed, "").Trim();
parentStack.Push(tempLineTrimed.Trim()); // due to lineTrimed string contains keywords such as "AND", "OR", "AND KNOWN" or "OR KNOWN" so that it needs removing those keywords for the 'parentStack'
// is an indented child
scanFeeder.HandleChild(parent, tempLineTrimed, tempFirstKeywordsGroup, lineNumber);
}
}
// does not begin with a white space
else
{
// is a parent
parentStack.Clear();
parent = lineTrimed;
scanFeeder.HandleParent(parent, lineNumber);
parentStack.Push(parent);
}
previousWhitespace = currentWhitespace;
}
}