// have finished with the header
// so about to enter the node body and all its statements
// do the initial setup required before compiling that body statements
// eg emit a new startlabel
public override void ExitHeader(YarnSpinnerParser.HeaderContext context)
{
var headerKey = context.header_key.Text;
// Use the header value if provided, else fall back to the
// empty string. This means that a header like "foo: \n" will
// be stored as 'foo', '', consistent with how it was typed.
// That is, it's not null, because a header was provided, but
// it was written as an empty line.
var headerValue = context.header_value?.Text ?? "";
if (headerKey.Equals("title", StringComparison.InvariantCulture))
{
// Set the name of the node
CurrentNode.Name = headerValue;
// Throw an exception if this node name contains illegal
// characters
if (invalidNodeTitleNameRegex.IsMatch(CurrentNode.Name))
{
throw new ParseException($"The node '{CurrentNode.Name}' contains illegal characters in its title.");
}
}
if (headerKey.Equals("tags", StringComparison.InvariantCulture))
{
// Split the list of tags by spaces, and use that
var tags = headerValue.Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
CurrentNode.Tags.Add(tags);
if (CurrentNode.Tags.Contains("rawText"))
{
// This is a raw text node. Flag it as such for future compilation.
RawTextNode = true;
}
}
}
/// <summary>
/// Visit a parse tree produced by <see cref="YarnSpinnerParser.header"/>.
/// <para>
/// The default implementation returns the result of calling <see cref="AbstractParseTreeVisitor{Result}.VisitChildren(IRuleNode)"/>
/// on <paramref name="context"/>.
/// </para>
/// </summary>
/// <param name="context">The parse tree.</param>
/// <return>The visitor result.</return>
public virtual Result VisitHeader([NotNull] YarnSpinnerParser.HeaderContext context)
{
return(VisitChildren(context));
}
/// <summary>
/// Enter a parse tree produced by <see cref="YarnSpinnerParser.header"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void EnterHeader([NotNull] YarnSpinnerParser.HeaderContext context)
{
}
