public LabelExpression Parse(string expression, int lineCounter)
{
this.lineCounter = lineCounter;
LabelExpression labelExpression = new LabelExpression();
string[] splits = expression.Split(separators, StringSplitOptions.RemoveEmptyEntries);
foreach (string split in splits)
{
string elementDef = split.Trim();
// skip empty splits
if (elementDef.Length == 0)
{
continue;
}
Match match = elementRegex.Match(elementDef);
if (false == match.Success)
{
ThrowParseError("Syntax error in label '{0}'", split);
}
string keyValue = match.Groups["key"].Value;
string stringValue = match.Groups["string"].Value;
ILabelExpressionElement labelExpressionElement = null;
if (false == String.IsNullOrEmpty(keyValue))
{
if (false == String.IsNullOrEmpty(stringValue))
{
labelExpressionElement = new OsmKeyLabelExpressionElement(keyValue, stringValue);
}
else
{
labelExpressionElement = new OsmKeyLabelExpressionElement(keyValue);
}
}
else
{
labelExpressionElement = new FormatLabelExpressionElement(stringValue);
}
labelExpression.AddElement(labelExpressionElement);
}
return(labelExpression);
}
public OsmKeyLabelExpressionElement(string keyName, string conditionalFormat)
{
this.keyName = keyName;
conditionalElement = new FormatLabelExpressionElement(conditionalFormat);
}