public IfNode(TokenMatch tokenMatch)
: base(tokenMatch)
{
_TrueNode = new TokenNode();
_FalseNode = new TokenNode();
}
private TokenNode InternalLexer(string template, List <TokenMatch> tokenMatches)
{
Stack <TokenNode> nodeStack = new Stack <TokenNode>();
TokenNode currentNode = new TokenNode();
int lastIndex = 0;
TextNode lastTextNode = null;
bool checkEmptyLine = false;
foreach (TokenMatch tokenMatch in tokenMatches)
{
Match match = tokenMatch.Match;
#region For TextNode
if (match.Index > lastIndex)
{
string text = template.Substring(lastIndex, match.Index - lastIndex);
if (checkEmptyLine)
{
text = CheckEmptyLine(lastTextNode, text);
}
lastTextNode = (TextNode)currentNode.ChildNodes.Add((TextNode)text);
checkEmptyLine = false;
}
lastIndex = match.Index + match.Length;
checkEmptyLine = tokenMatch.RemoveEmptyLine && !checkEmptyLine;
#endregion
switch (tokenMatch.TokenType)
{
#region switch TemplateTokenType
case TemplateTokenType.Set:
currentNode.ChildNodes.Add((SetNode)tokenMatch);
break;
case TemplateTokenType.Expression:
currentNode.ChildNodes.Add((ExpressionNode)tokenMatch);
break;
case TemplateTokenType.ForEach:
nodeStack.Push(currentNode);
currentNode = currentNode.ChildNodes.Add((ForeachNode)tokenMatch);
break;
case TemplateTokenType.While:
nodeStack.Push(currentNode);
currentNode = currentNode.ChildNodes.Add((WhileNode)tokenMatch);
break;
case TemplateTokenType.If:
nodeStack.Push(currentNode);
IfNode ifNode = currentNode.ChildNodes.Add((IfNode)tokenMatch);
currentNode = ifNode.TrueNode;
nodeStack.Push(ifNode);
break;
case TemplateTokenType.ElseIf:
IfNode last = nodeStack.Peek() as IfNode;
if (last == null)
{
throw new Exception("error syntax: #elseif can't use without the #if");
}
currentNode = last.FalseNode;
last = currentNode.ChildNodes.Add((IfNode)tokenMatch);
currentNode = last.TrueNode;
nodeStack.Push(last);
break;
case TemplateTokenType.Else:
IfNode ifNode2 = nodeStack.Peek() as IfNode;
if (ifNode2 == null)
{
throw new Exception("error syntax: #else can't use without the #if");
}
currentNode = ifNode2.FalseNode;
break;
case TemplateTokenType.EndBlock:
while (nodeStack.Peek() is IfNode)
{
nodeStack.Pop();
}
currentNode = nodeStack.Pop();
break;
#endregion
}
}
#region For TextNode
if (lastIndex < template.Length - 1)
{
string text = template.Substring(lastIndex);
if (checkEmptyLine)
{
text = CheckEmptyLine(lastTextNode, text);
}
currentNode.ChildNodes.Add((TextNode)text);
}
#endregion
return(currentNode);
}
