/// <summary>
/// Reconstructs the original EggsML that is represented by this node.</summary>
/// <remarks>
/// This does not necessarily return the same EggsML that was originally parsed. For example, redundant uses of
/// the <c>`</c> character are removed.</remarks>
public override string ToString()
{
if (_children.Count == 0)
{
return(Tag == null ? "" : EggsML.alwaysOpens(Tag) ? Tag.ToString() + EggsML.opposite(Tag) : Tag + "`" + Tag);
}
var childrenStr = stringify(_children, Tag);
return(Tag == null
? childrenStr
: childrenStr.StartsWith(Tag)
? childrenStr.EndsWith(EggsML.opposite(Tag))
? Tag + "`" + childrenStr + "`" + EggsML.opposite(Tag)
: Tag + "`" + childrenStr + EggsML.opposite(Tag)
: childrenStr.EndsWith(EggsML.opposite(Tag))
? Tag + childrenStr + "`" + EggsML.opposite(Tag)
: Tag + childrenStr + EggsML.opposite(Tag));
}
/// <summary>
/// Turns a list of child nodes into EggsML mark-up.</summary>
/// <param name="children">
/// List of children to turn into mark-up.</param>
/// <param name="tag">
/// If non-null, assumes we are directly inside a tag with the specified character, causing necessary escaping to
/// be performed.</param>
/// <returns>
/// EggsML mark-up representing the same tree structure as this node.</returns>
protected static string stringify(List <EggsNode> children, char?tag)
{
if (children == null || children.Count == 0)
{
return("");
}
var sb = new StringBuilder();
for (int i = 0; i < children.Count; i++)
{
var childStr = children[i].ToString();
if (string.IsNullOrEmpty(childStr))
{
continue;
}
// If the item is a tag, and it is the same tag character as the current one, we need to escape it by tripling it
if (sb.Length > 0 && childStr.Length > 0 && childStr[0] == sb[sb.Length - 1])
{
sb.Append('`');
}
if (tag != null && children[i] is EggsTag && ((EggsTag)children[i]).Tag == tag && !EggsML.alwaysOpens(tag))
{
sb.Append(new string(tag.Value, 2));
}
sb.Append(childStr);
}
return(sb.ToString());
}
