private Tag CollectForTag(Tag tag, ref int index)
{
if (tag.IsClosed) {
return tag;
}
if (string.Compare(tag.Name, "if", true) == 0) {
tag = new IfStatement(tag.Line, tag.Col, tag.AttributeValue("test"));
}
Tag collectTag = tag;
for (index++; index < elements.Count; index++) {
Token elem = elements[index];
if (elem is Text) {
collectTag.InnerTokens.Add(elem);
} else if (elem is Expression) {
collectTag.InnerTokens.Add(elem);
} else if (elem is Tag) {
Tag innerTag = (Tag) elem;
if (string.Compare(innerTag.Name, "else", true) == 0) {
if (collectTag is IfStatement) {
((IfStatement) collectTag).FalseBranch = innerTag;
collectTag = innerTag;
} else {
throw new TmplException("else tag has to be positioned inside of if or elseif tag " + innerTag.Line + "," + innerTag.Col, innerTag.Line, innerTag.Col);
}
} else if (string.Compare(innerTag.Name, "elseif", true) == 0) {
if (collectTag is IfStatement) {
Tag newTag = new IfStatement(innerTag.Line, innerTag.Col, innerTag.AttributeValue("test"));
((IfStatement) collectTag).FalseBranch = newTag;
collectTag = newTag;
} else {
throw new TmplException("elseif tag is not positioned properly" + innerTag.Line + "," + innerTag.Col, innerTag.Line, innerTag.Col);
}
} else {
collectTag.InnerTokens.Add(CollectForTag(innerTag, ref index));
}
} else if (elem is StatementClose) {
StatementClose tagClose = (StatementClose) elem;
return tag;
} else {
throw new TmplException("Invalid element: [" + elem.GetType().ToString() + "] " + elem.Line + "," + elem.Col, elem.Line, elem.Col);
}
}
throw new TmplException("Start tag: [" + tag.Name + "] does not have matching end tag." + tag.Line + "," + tag.Col, tag.Line, tag.Col);
}
private void ProcessIf(IfStatement tagIf)
{
bool condition = false;
try {
condition = Util.ToBoolean(EvalExpression(tagIf.Test));
} catch (Exception ex) {
DisplayError("Error evaluating condition for if statement: [" + tagIf.Test + "] " + ex.Message, tagIf.Line, tagIf.Col);
return;
}
if (condition) {
ProcessElements(tagIf.InnerTokens);
} else {
ProcessElement(tagIf.FalseBranch);
}
}
private void visitTagIf(IfStatement tag)
{
WriteLine("Tag: " + tag.Name);
AddAttribs(tag.Attributes);
foreach (Token elem in tag.InnerTokens) {
visitElement(elem);
}
if (tag.FalseBranch != null) {
visitElement(tag.FalseBranch);
}
}
