public static TextNode ParseEmphasisText(Deque <Token> tokens)
{
var underscore = tokens.PopFirst();
if (tokens.Count == 0)
{
return(ParseText(new Deque <Token> {
new Token(TokenType.Text, underscore.Value)
}));
}
if (tokens.PeekFirst().Type == TokenType.Space)
{
tokens.Insert(0, new Token(TokenType.Text, underscore.Value));
return(ParseText(tokens));
}
var emphasisText = new TextNode(TextType.Emphasis);
while (true)
{
if (tokens.Count == 0)
{
emphasisText.Words.Insert(0, new WordNode(WordType.SimpleWord, underscore.Value));
return(new TextNode(TextType.Text, emphasisText.Words));
}
var currentToken = tokens.PeekFirst();
switch (currentToken.Type)
{
case TokenType.Underscore:
tokens.PopFirst();
if (emphasisText.Words.Last().Type == WordType.Space)
{
emphasisText.Words.Insert(0, new WordNode(WordType.SimpleWord, underscore.Value));
return(new TextNode(TextType.Text, emphasisText.Words));
}
return(emphasisText);
case TokenType.DoubleUnderscore:
tokens.PopFirst();
var doubleUnderscore = new WordNode(WordType.SimpleWord, underscore.Value + underscore.Value);
emphasisText.Add(doubleUnderscore);
break;
default:
var innerText = ParseText(tokens);
var innerWords = innerText.Words;
emphasisText.AddRange(innerWords);
break;
}
}
}
public static TextNode ParseBoldText(Deque <Token> tokens)
{
var doubleUnderscore = tokens.PopFirst();
if (tokens.Count == 0)
{
return(ParseText(new Deque <Token> {
new Token(TokenType.Text, doubleUnderscore.Value)
}));
}
if (tokens.PeekFirst().Type == TokenType.Space)
{
tokens.Insert(0, new Token(TokenType.Text, doubleUnderscore.Value));
return(ParseText(tokens));
}
var boldText = new TextNode(TextType.Bold);
while (true)
{
if (tokens.Count == 0)
{
boldText.Words.Insert(0, new WordNode(WordType.SimpleWord, doubleUnderscore.Value));
return(new TextNode(TextType.Text, boldText.Words));
}
var currentToken = tokens.PeekFirst();
switch (currentToken.Type)
{
case TokenType.DoubleUnderscore:
tokens.PopFirst();
if (boldText.Words.Last().Type == WordType.Space)
{
boldText.Words.Insert(0, new WordNode(WordType.SimpleWord, doubleUnderscore.Value));
return(new TextNode(TextType.Text, boldText.Words));
}
return(boldText);
case TokenType.Underscore:
var innerEmphasisText = ParseEmphasisText(tokens);
if (innerEmphasisText.Type == TextType.Text)
{
boldText.AddRange(innerEmphasisText.Words);
continue;
}
var openEmTag = new WordNode(WordType.SimpleWord, "<em>");
var closeEmTag = new WordNode(WordType.SimpleWord, "</em>");
boldText.Add(openEmTag);
boldText.AddRange(innerEmphasisText.Words);
boldText.Add(closeEmTag);
break;
default:
var innerText = ParseText(tokens);
var innerWords = innerText.Words;
boldText.AddRange(innerWords);
break;
}
}
}
