protected internal virtual SyntaxTreeNode Visit(SequenceNode node)
{
if (node == null) return null;
var modifiedSubNodes = GetModifiedSubNodes(node);
if (modifiedSubNodes == null)
return node; //unmodified
else
return node.SetSubNodes(modifiedSubNodes); //subnodes were modified
}
protected internal virtual SyntaxTreeNode Visit(SequenceNode node)
{
if (node == null)
{
return(null);
}
var modifiedSubNodes = GetModifiedSubNodes(node);
if (modifiedSubNodes == null)
{
return(node); //unmodified
}
else
{
return(node.SetSubNodes(modifiedSubNodes)); //subnodes were modified
}
}
public virtual SequenceNode ParseSyntaxTree(string bbCode)
{
if (bbCode == null) throw new ArgumentNullException("bbCode");
Stack<SyntaxTreeNode> stack = new Stack<SyntaxTreeNode>();
var rootNode = new SequenceNode();
stack.Push(rootNode);
int end = 0;
while (end < bbCode.Length)
{
if (MatchTagEnd(bbCode, ref end, stack))
continue;
if (MatchStartTag(bbCode, ref end, stack))
continue;
if (MatchTextNode(bbCode, ref end, stack))
continue;
if (ErrorMode != ErrorMode.ErrorFree)
throw new BBCodeParsingException(""); //there is no possible match at the current position
AppendText(bbCode[end].ToString(), stack); //if the error free mode is enabled force interpretation as text if no other match could be made
end++;
}
Debug.Assert(end == bbCode.Length); //assert bbCode was matched entirely
while (stack.Count > 1) //close all tags that are still open and can be closed implicitly
{
var node = (TagNode)stack.Pop();
if (node.Tag.RequiresClosingTag && ErrorMode == ErrorMode.Strict) throw new BBCodeParsingException(MessagesHelper.GetString("TagNotClosed", node.Tag.Name));
}
if (stack.Count != 1)
{
Debug.Assert(ErrorMode != ErrorMode.ErrorFree);
throw new BBCodeParsingException(""); //only the root node may be left
}
return rootNode;
}
protected internal override SyntaxTreeNode Visit(SequenceNode node)
{
var baseResult = base.Visit(node);
return baseResult.SetSubNodes(baseResult.SubNodes.Concat(new[] { new TextNode("y") }));
}
protected internal override SyntaxTreeNode Visit(SequenceNode node)
{
var baseResult = base.Visit(node);
if (!PexChoose.Value<bool>("x")) return baseResult;
return baseResult.SetSubNodes(baseResult.SubNodes.ToList());
}
public static SequenceNode CreateRootNode(BBTag[] allowedTags)
{
var node = new SequenceNode();
AddSubnodes(allowedTags, node);
return node;
}