public override AstNode Process(ParserReader parser)
{
var reader = parser.Input;
if(parser.Text.StartsWith("-#"))
{
// skip all children
parser.ParseChildren(parser.Indent, null);
return null;
}
var node = new CommentNode();
reader.Skip("/");
reader.SkipWhiteSpaces();
if(reader.CurrentChar == '[')
{
reader.Skip("[");
node.Condition = reader.ReadWhile(c => c != ']');
}
else if(!reader.IsEndOfStream)
{
var index = reader.Index;
var text = reader.ReadToEndMultiLine();
node.Child = parser.ParseText(text, index);
}
if (reader.NextLine != null && reader.NextLine.Indent > reader.CurrentLine.Indent)
{
node.Child = parser.ParseChildren(parser.Indent, node.Child);
}
return node;
}
public override void Visit(CommentNode node)
{
if(string.IsNullOrEmpty(node.Condition))
{
WriteText("<!--");
var space = !( node.Child is ChildrenNode );
if(space)
WriteText(" ");
Visit(node.Child);
if(space)
WriteText(" ");
WriteText("-->");
}
else
{
WriteText(String.Format("<!--[{0}]>", node.Condition));
Indent++;
VisitAndIdentAlways(node.Child);
Indent--;
WriteIndent();
WriteText("<![endif]-->");
}
}
public virtual void Visit(CommentNode node)
{
if(node.Child != null)
Visit(node.Child);
}