protected override IJadeCompileResult CompileFromAst(JRootNode ast)
{
var result = new HtmlCompileResult();
//Compile the KJade AST to a HTML AST
var htmlAst = GetHtmlNode(ast);
//Emit on first level nodes because the root is not a real node
foreach (var firstLevelNode in htmlAst.Children)
{
EmitHtml(firstLevelNode, result.Value);
}
return(result);
}
protected abstract IJadeCompileResult CompileFromAst(JRootNode ast);
public JRootNode ParseTokens(List <JadeToken> tokens)
{
var originalCode = string.Concat(tokens.Select(t => t.TextRepresentation + new string(' ', t.IndentationLevel) + '\n'));
var rootNode = new JRootNode();
//Parse the input tokens and build an AST.
var nestingLevel = new Stack <int>();
nestingLevel.Push(-1); //-1, signifying an unreachable nesting level. All nodes are children of this root.
var lastNodeOnLevel = new Stack <JNode>();
lastNodeOnLevel.Push(rootNode);
foreach (var jToken in tokens)
{
var newNode = CreateNodeFromJadeToken(jToken);
if (newNode.Attributes.Count == 0 && newNode.Element == null && newNode.Classes.Count == 0 && newNode.Id == null && newNode.Value == null)
{
//Unfortunately, this node is useless!
continue;
}
var currentNestingLevel = nestingLevel.Peek();
if (jToken.IndentationLevel > currentNestingLevel + 1)
{
//The indentation level jumped illegally
var errorPosition = CalculateCodePosition(tokens, jToken);
throw new KJadeParserException("Unexpected indentation: the indentation may not change by more than one value at a time!", errorPosition);
}
if (jToken.IndentationLevel > currentNestingLevel)
{
//We're nesting deeper
lastNodeOnLevel.Peek().Children.Add(newNode);
nestingLevel.Push(currentNestingLevel + 1);
lastNodeOnLevel.Push(newNode);
}
else if (jToken.IndentationLevel == currentNestingLevel)
{
//We're on the same level
lastNodeOnLevel.Pop(); //Pop the previous node added, because it's on the same level
lastNodeOnLevel.Peek().Children.Add(newNode);
lastNodeOnLevel.Push(newNode);
}
else if (jToken.IndentationLevel < currentNestingLevel)
{
//We're going back toward the root
while (nestingLevel.Peek() > jToken.IndentationLevel)
{
//Pop off parent layers
nestingLevel.Pop();
lastNodeOnLevel.Pop();
}
//We've popped our way down
//Indent level has been decreased
//Pop the same-level last node on the level
lastNodeOnLevel.Pop();
lastNodeOnLevel.Peek().Children.Add(newNode);
lastNodeOnLevel.Push(newNode);
}
}
nestingLevel.Pop(); //We've reached the end!
//Prune the tree
return(rootNode);
}
