protected override void Visit(IndentationNode node)
{
EndIndentationLength(node.Whitespace.Length);
PushFrame(Nodes, new Frame
{
Indentation = node,
ElementsStarted = new List <ElementNode>()
});
base.Visit(node);
}
protected override void Visit(IndentationNode node)
{
this.EndIndentationLength(node.Whitespace.Length);
Frame frameData = new Frame {
Indentation = node,
ElementsStarted = new List <ElementNode>()
};
base.PushFrame(this.Nodes, frameData);
base.Visit(node);
}
private static IndentationNode newNode(IndentationNode node, int depth)
{
if (node == null)
{
return(new IndentationNode(null, depth));
}
var diff = depth - node.Depth;
if (diff > 0)
{
if (diff > 1)
{
throw new ArgumentException("indentation");
}
}
else if (diff < 0)
{
while (node != null && node.Depth >= depth)
{
node = node.Parent;
}
if (node == null)
{
throw new ArgumentException("indentation");
}
}
else
{
node = node.Parent;
}
if (depth - node.Depth != 1)
{
throw new ArgumentException("indentation");
}
var result = new IndentationNode(node, depth);
node.AddChild(result);
return(result);
}
public static IndentationNode Parse(IEnumerable <SyntaxToken> tokens, int step)
{
var lines = readLines(tokens);
var rootIndent = getIndentation(lines[0], step);
var root = new IndentationNode(null, rootIndent - 1);
var current = root;
foreach (var line in lines)
{
if (string.IsNullOrWhiteSpace(line) || isComment(line))
{
continue;
}
var indent = getIndentation(line, step);
current = newNode(current, indent);
current.SetValue(line.TrimStart());
}
return(root);
}
protected abstract void Visit(IndentationNode node);
protected override void Visit(IndentationNode node)
{
this.Nodes.Add(node);
}
protected override void Visit(IndentationNode node)
{
Add(node);
}
