private void Parse()
{
for (m = reConstruct.Match(inputString); m.Success; m = m.NextMatch())
{
if (lastIndex != m.Index)
{
ParseTextContent(inputString.Substring(lastIndex, m.Index - lastIndex));
}
lastIndex = m.Index + m.Length;
var m1 = m.Groups[1].Value;
var m2 = m.Groups[2].Value;
switch (m1)
{
case "!":
break;
case "/":
Assert(controlStack.Count > 0 && m2 == controlStack.Peek().TokenName);
controlStack.Peek().Token.Index = this.Count;
if (m2 == TOKEN_FOREACH)
{
this.Add(new IterationEndToken(controlStack.Peek().TokenIndex + 1));
}
controlStack.Pop();
break;
case TOKEN_IF:
case TOKEN_IFNOT: {
ConditionToken t = new ConditionToken(CreatePipe(), m1 == TOKEN_IFNOT);
controlStack.Push(new ControlTokenInfo(TOKEN_IF, this.Count, t));
break;
}
case TOKEN_ELSE:
case TOKEN_ELSEIF:
case TOKEN_ELSEIFNOT: {
Assert(controlStack.Count > 0 && controlStack.Peek().TokenName == TOKEN_IF);
ControlTokenInfo previousControl = controlStack.Pop();
BranchToken t = new BranchToken();
controlStack.Push(new ControlTokenInfo(TOKEN_IF, this.Count, t));
(previousControl.TokenIf ?? previousControl.Token).Index = this.Count;
if (previousControl.Token.Type == TokenType.OP_JUMP)
{
controlStack.Peek().Token = previousControl.Token;
}
this.Add(t);
if (m1 == TOKEN_ELSEIF || m1 == TOKEN_ELSEIFNOT)
{
controlStack.Peek().TokenIf = new ConditionToken(CreatePipe(), m1 == TOKEN_ELSEIFNOT);
}
break;
}
case TOKEN_FOREACH: {
IterationToken t = new IterationToken(CreatePipe());
controlStack.Push(new ControlTokenInfo(TOKEN_FOREACH, this.Count, t));
this.Add(t);
break;
}
default:
this.Add(new EvaluateToken(CreatePipe(), m1 == "&"));
break;
}
}
if (lastIndex != inputString.Length)
{
ParseTextContent(inputString.Substring(lastIndex));
}
}
private object Evaluate()
{
StringBuilder sb = new StringBuilder();
try {
int i = 0;
int e = tokens.Count;
while (i < e)
{
Token t = tokens[i++];
switch (t.Type)
{
case TokenType.OP_EVAL:
EvaluateToken et = (EvaluateToken)t;
int prevCount = evalCount;
PipeValue result = et.Expression.Evaluate(this);
if (result.IsEvallable)
{
string str = result.Type == PipeValueType.Object ? JsonConvert.SerializeObject(result) : result.ToString();
if (evalCount != prevCount || et.SuppressHtmlEncode)
{
sb.Append(str);
}
else
{
sb.Append(HttpUtility.HtmlEncode(str));
}
}
break;
case TokenType.OP_ITER:
IterationToken it = (IterationToken)t;
IEnumerator iterable = it.Expression.Evaluate(this).GetEnumerator();
PushObjectStack(iterable);
if (!iterable.MoveNext())
{
i = it.Index;
}
break;
case TokenType.OP_ITER_END:
IterationEndToken iet = (IterationEndToken)t;
if (!((IEnumerator)objStack.Peek().Value).MoveNext())
{
PopObjectStack();
}
else
{
i = iet.Index;
}
break;
case TokenType.OP_TEST:
ConditionToken ct = (ConditionToken)t;
if (!(bool)ct.Expression.Evaluate(this) ^ ct.Negate)
{
i = ct.Index;
}
break;
case TokenType.OP_JUMP:
i = ((BranchToken)t).Index;
break;
default:
OutputToken ot = (OutputToken)t;
if (this.Options.OutputXml)
{
XmlElement currentElm = xmlStack.Peek();
HtmlOutputToken ht = (HtmlOutputToken)ot;
switch (t.Type)
{
case TokenType.HTMLOP_ELEMENT_START:
FlushOutput(sb, currentElm);
xmlStack.Push(currentElm.OwnerDocument.CreateElement(ht.TagName));
currentElm.AppendChild(xmlStack.Peek());
break;
case TokenType.HTMLOP_ELEMENT_END:
FlushOutput(sb, currentElm);
xmlStack.Pop();
break;
case TokenType.HTMLOP_ATTR_END:
XmlAttribute attr = currentElm.OwnerDocument.CreateAttribute(ht.AttributeName);
attr.Value = sb.ToString();
currentElm.Attributes.Append(attr);
sb.Clear();
break;
case TokenType.HTMLOP_TEXT:
sb.Append(ht.Text);
break;
}
}
else
{
sb.Append(ot.Value);
i = ot.Index;
}
break;
}
}
} finally {
evalCount = (evalCount + 1) & 0xFFFF;
}
if (this.Options.OutputXml)
{
FlushOutput(sb, xmlStack.Peek());
return(xmlStack.Peek());
}
return(Regex.Replace(sb.ToString(), @"^\s+(?=<)|(>)\s+(<|$)", m => m.Groups[1].Value + m.Groups[2].Value));
}