private ArgumentCollection getArguments(TagDefinition definition, Match match, List <Context> context)
{
// make sure we don't have too many arguments
List <Capture> captures = match.Groups["argument"].Captures.Cast <Capture>().ToList();
List <TagParameter> parameters = definition.Parameters.ToList();
if (captures.Count > parameters.Count)
{
string message = String.Format(_config.WrongNumberOfArguments, definition.Name);
throw new FormatException(message);
}
// provide default values for missing arguments
if (captures.Count < parameters.Count)
{
captures.AddRange(Enumerable.Repeat((Capture)null, parameters.Count - captures.Count));
}
// pair up the parameters to the given arguments
// provide default for parameters with missing arguments
// throw an error if a missing argument is for a required parameter
Dictionary <TagParameter, string> arguments = new Dictionary <TagParameter, string>();
foreach (var pair in parameters.Zip(captures, (p, c) => new { Capture = c, Parameter = p }))
{
string value = null;
if (pair.Capture != null)
{
value = pair.Capture.Value;
}
else if (pair.Parameter.IsRequired)
{
string message = String.Format(_config.WrongNumberOfArguments, definition.Name);
throw new FormatException(message);
}
arguments.Add(pair.Parameter, value);
}
// indicate that a key/variable has been encountered
// update the key/variable name
ArgumentCollection collection = new ArgumentCollection();
foreach (var pair in arguments)
{
string placeholder = pair.Value;
IArgument argument = null;
if (placeholder != null)
{
if (placeholder.StartsWith("@"))
{
string variableName = placeholder.Substring(1);
VariableFoundEventArgs args = new VariableFoundEventArgs(placeholder.Substring(1), String.Empty, String.Empty, context.ToArray());
if (VariableFound != null)
{
VariableFound(this, args);
variableName = args.Name;
}
argument = new VariableArgument(variableName);
}
else if (RegexHelper.IsString(placeholder))
{
string value = placeholder.Trim('\'');
argument = new StringArgument(value);
}
else if (RegexHelper.IsNumber(placeholder))
{
decimal number;
if (Decimal.TryParse(placeholder, out number))
{
argument = new NumberArgument(number);
}
}
else
{
string placeholderName = placeholder;
PlaceholderFoundEventArgs args = new PlaceholderFoundEventArgs(placeholder, String.Empty, String.Empty, context.ToArray());
if (PlaceholderFound != null)
{
PlaceholderFound(this, args);
placeholderName = args.Key;
}
argument = new PlaceholderArgument(placeholderName);
}
}
collection.AddArgument(pair.Key, argument);
}
return(collection);
}
private int buildCompoundGenerator(
TagDefinition tagDefinition,
List <Context> context,
CompoundGenerator generator,
string format, int formatIndex)
{
while (true)
{
Match match = findNextTag(tagDefinition, format, formatIndex);
if (!match.Success)
{
if (tagDefinition.ClosingTags.Any())
{
string message = String.Format(_config.MissingClosingTag, tagDefinition.Name);
throw new FormatException(message);
}
break;
}
string leading = format.Substring(formatIndex, match.Index - formatIndex);
if (match.Groups["key"].Success)
{
generator.AddGenerator(new StaticGenerator(leading, RemoveNewLines));
formatIndex = match.Index + match.Length;
string key = match.Groups["key"].Value;
string alignment = match.Groups["alignment"].Value;
string formatting = match.Groups["format"].Value;
if (key.StartsWith("@"))
{
VariableFoundEventArgs args = new VariableFoundEventArgs(key.Substring(1), alignment, formatting, context.ToArray());
if (VariableFound != null)
{
VariableFound(this, args);
key = "@" + args.Name;
alignment = args.Alignment;
formatting = args.Formatting;
}
}
else
{
PlaceholderFoundEventArgs args = new PlaceholderFoundEventArgs(key, alignment, formatting, context.ToArray());
if (PlaceholderFound != null)
{
PlaceholderFound(this, args);
key = args.Key;
alignment = args.Alignment;
formatting = args.Formatting;
}
}
KeyGenerator keyGenerator = new KeyGenerator(key, alignment, formatting);
generator.AddGenerator(keyGenerator);
}
else if (match.Groups["open"].Success)
{
formatIndex = match.Index + match.Length;
string tagName = match.Groups["name"].Value;
TagDefinition nextDefinition = _tagLookup[tagName];
if (nextDefinition == null)
{
string message = String.Format(_config.UnknownTag, tagName);
throw new FormatException(message);
}
generator.AddGenerator(new StaticGenerator(leading, RemoveNewLines));
ArgumentCollection arguments = getArguments(nextDefinition, match, context);
if (nextDefinition.HasContent)
{
CompoundGenerator compoundGenerator = new CompoundGenerator(nextDefinition, arguments);
IEnumerable <TagParameter> contextParameters = nextDefinition.GetChildContextParameters();
bool hasContext = contextParameters.Any();
if (hasContext)
{
ContextParameter[] parameters = contextParameters.Select(p => new ContextParameter(p.Name, arguments.GetKey(p))).ToArray();
context.Add(new Context(nextDefinition.Name, parameters));
}
formatIndex = buildCompoundGenerator(nextDefinition, context, compoundGenerator, format, formatIndex);
generator.AddGenerator(nextDefinition, compoundGenerator);
if (hasContext)
{
context.RemoveAt(context.Count - 1);
}
}
else
{
InlineGenerator inlineGenerator = new InlineGenerator(nextDefinition, arguments);
generator.AddGenerator(inlineGenerator);
}
}
else if (match.Groups["close"].Success)
{
generator.AddGenerator(new StaticGenerator(leading, RemoveNewLines));
string tagName = match.Groups["name"].Value;
TagDefinition nextDefinition = _tagLookup[tagName];
formatIndex = match.Index;
if (tagName == tagDefinition.Name)
{
formatIndex += match.Length;
}
break;
}
else if (match.Groups["comment"].Success)
{
generator.AddGenerator(new StaticGenerator(leading, RemoveNewLines));
formatIndex = match.Index + match.Length;
}
else if (match.Groups["unknown"].Success)
{
string tagName = match.Value;
string message = String.Format(_config.UnknownTag, tagName);
throw new FormatException(message);
}
}
return(formatIndex);
}