private bool?HandleEndTag(Token t, HtmlTreeBuilder tb)
{
Token.EndTag endTag = t.AsEndTag();
string name = endTag.Name;
if (name.Equals("body"))
{
if (!tb.InScope("body"))
{
tb.Error(this);
return(false);
}
else
{
// TODO: error if stack contains something not dd, dt, li, optgroup, option, p, rp, rt, tbody, td, tfoot, th, thead, tr, body, html
tb.Transition(AfterBody);
}
}
else if (name.Equals("html"))
{
bool notIgnored = tb.Process(new Token.EndTag("body"));
if (notIgnored)
{
return(tb.Process(endTag));
}
}
else if (StringSet.Create(@"address article aside blockquote button center details dir div
dl fieldset figcaption figure footer header hgroup listing menu
nav ol pre section summary ul").Contains(name))
{
// TODO: refactor these lookups
if (!tb.InScope(name))
{
// nothing to close
tb.Error(this);
return(false);
}
else
{
tb.GenerateImpliedEndTags();
if (!tb.CurrentElement.NodeName.Equals(name))
{
tb.Error(this);
}
tb.PopStackToClose(name);
}
}
else if (name.Equals("form"))
{
HtmlElement currentForm = tb.FormElement;
tb.FormElement = null;
if (currentForm == null || !tb.InScope(name))
{
tb.Error(this);
return(false);
}
else
{
tb.GenerateImpliedEndTags();
if (!tb.CurrentElement.NodeName.Equals(name))
{
tb.Error(this);
}
// remove currentForm from stack. will shift anything under up.
tb.RemoveFromStack(currentForm);
}
}
else if (name.Equals("p"))
{
if (!tb.InButtonScope(name))
{
tb.Error(this);
tb.Process(new Token.StartTag(name)); // if no p to close, creates an empty <p></p>
return(tb.Process(endTag));
}
else
{
tb.GenerateImpliedEndTags(name);
if (!tb.CurrentElement.NodeName.Equals(name))
{
tb.Error(this);
}
tb.PopStackToClose(name);
}
}
else if (name.Equals("li"))
{
if (!tb.InListItemScope(name))
{
tb.Error(this);
return(false);
}
else
{
tb.GenerateImpliedEndTags(name);
if (!tb.CurrentElement.NodeName.Equals(name))
{
tb.Error(this);
}
tb.PopStackToClose(name);
}
}
else if (StringUtil.In(name, "dd", "dt"))
{
if (!tb.InScope(name))
{
tb.Error(this);
return(false);
}
else
{
tb.GenerateImpliedEndTags(name);
if (!tb.CurrentElement.NodeName.Equals(name))
{
tb.Error(this);
}
tb.PopStackToClose(name);
}
}
else if (HeadingTags.Contains(name))
{
if (!tb.InScope(HeadingTags))
{
tb.Error(this);
return(false);
}
else
{
tb.GenerateImpliedEndTags(name);
if (!tb.CurrentElement.NodeName.Equals(name))
{
tb.Error(this);
}
tb.PopStackToClose(HeadingTags);
}
}
else if (name.Equals("sarcasm"))
{
// *sigh*
return(AnyOtherEndTag(t, tb));
}
else if (StringSet.Create("a b big code em font i nobr s small strike strong tt u").Contains(name))
{
// Adoption Agency Algorithm.
OUTER:
for (int i = 0; i < 8; i++)
{
var formatEl = tb.GetActiveFormattingElement(name);
if (formatEl == null)
{
return(AnyOtherEndTag(t, tb));
}
else if (!tb.OnStack(formatEl))
{
tb.Error(this);
tb.RemoveFromActiveFormattingElements(formatEl);
return(true);
}
else if (!tb.InScope(formatEl.NodeName))
{
tb.Error(this);
return(false);
}
else if (tb.CurrentElement != formatEl)
{
tb.Error(this);
}
DomContainer furthestBlock = null;
DomContainer commonAncestor = null;
bool seenFormattingElement = false;
DescendableLinkedList <DomContainer> stack = tb.Stack;
for (int si = 0; si < stack.Count; si++)
{
DomContainer el = stack.ElementAt(si);
if (el == formatEl)
{
commonAncestor = stack.ElementAt(si - 1);
seenFormattingElement = true;
}
else if (seenFormattingElement && tb.IsSpecial(el))
{
furthestBlock = el;
break;
}
}
if (furthestBlock == null)
{
tb.PopStackToClose(formatEl.NodeName);
tb.RemoveFromActiveFormattingElements(formatEl);
return(true);
}
// TODO: Let a bookmark note the position of the formatting element in the list of active formatting elements relative to the elements on either side of it in the list.
// does that mean: int pos of format el in list?
DomContainer node = furthestBlock;
DomContainer lastNode = furthestBlock;
INNER:
for (int j = 0; j < 3; j++)
{
continueINNER:
if (tb.OnStack(node))
{
node = tb.AboveOnStack(node);
}
if (!tb.IsInActiveFormattingElements(node)) // note no bookmark check
{
tb.RemoveFromStack(node);
goto continueINNER;
}
else if (node == formatEl)
{
goto breakINNER;
}
HtmlElement replacement = new HtmlElement(node.NodeName);
tb.ReplaceActiveFormattingElement(node, replacement);
tb.ReplaceOnStack(node, replacement);
node = replacement;
if (lastNode == furthestBlock)
{
// TODO: move the aforementioned bookmark to be immediately after the new node in the list of active formatting elements.
// not getting how this bookmark both straddles the element above, but is inbetween here...
}
if (lastNode.Parent != null)
{
lastNode.Remove();
}
node.Append(lastNode);
lastNode = node;
}
breakINNER:
if (StringUtil.In(commonAncestor.NodeName, "table", "tbody", "tfoot", "thead", "tr"))
{
if (lastNode.Parent != null)
{
lastNode.Remove();
}
tb.InsertInFosterParent(lastNode);
}
else
{
if (lastNode.Parent != null)
{
lastNode.Remove();
}
commonAncestor.Append(lastNode);
}
HtmlElement adopter = new HtmlElement(name);
var childNodes = furthestBlock.ChildNodes.ToArray();
foreach (var childNode in childNodes)
{
adopter.Append(childNode); // append will reparent. thus the clone to avvoid concurrent mod.
}
furthestBlock.Append(adopter);
tb.RemoveFromActiveFormattingElements(formatEl);
// TODO: insert the new element into the list of active formatting elements at the position of the aforementioned bookmark.
tb.RemoveFromStack(formatEl);
tb.InsertOnStackAfter(furthestBlock, adopter);
}
}
else if (StringUtil.In(name, "applet", "marquee", "object"))
{
if (!tb.InScope("name"))
{
if (!tb.InScope(name))
{
tb.Error(this);
return(false);
}
tb.GenerateImpliedEndTags();
if (!tb.CurrentElement.NodeName.Equals(name))
{
tb.Error(this);
}
tb.PopStackToClose(name);
tb.ClearFormattingElementsToLastMarker();
}
}
else if (name.Equals("br"))
{
tb.Error(this);
tb.Process(new Token.StartTag("br"));
return(false);
}
else
{
return(AnyOtherEndTag(t, tb));
}
return(null);
}