public TagNode(BbTag tag, IEnumerable <SyntaxTreeNode> subNodes) : base(subNodes)
{
if (tag == null)
{
throw new ArgumentNullException(nameof(tag));
}
Tag = tag;
AttributeValues = new Dictionary <BbAttribute, string>();
}
private BbTag NoResult()
{
var toReturn = new BbTag
{
Start = lastStart - 1,
End = currentPosition,
Type = BbCodeType.None
};
Last = toReturn;
return(toReturn);
}
private BbTag ReturnAsTextBetween(int start, int end)
{
if (end - start <= 1)
{
end = start + 2;
}
var toReturn = new BbTag
{
Type = BbCodeType.None,
Start = start,
End = end - 1
};
var rewindTo = Last?.End ?? 0;
currentPosition = rewindTo;
Last = toReturn;
return(toReturn);
}
internal static ParsedChunk FromTag(BbTag tag, string context)
{
var last = tag.ClosingTag?.End ?? tag.End;
var toReturn = new ParsedChunk
{
Start = tag.Start,
End = last,
Type = tag.Type,
Arguments = tag.Arguments
};
if (tag.Children != null && tag.Children.Any())
{
toReturn.Children = tag.Children.Select(x => FromTag(x, context)).ToList();
}
if (tag.Type == BbCodeType.None)
{
toReturn.InnerText = context.Substring(tag.Start, tag.End - tag.Start);
}
return(toReturn);
}
public BbTag Next()
{
if (HasReachedEnd)
{
return(NoResult());
}
var openBrace = input.IndexOf('[', currentPosition);
var closeBrace = input.IndexOf(']', currentPosition);
currentPosition = closeBrace + 1;
lastStart = openBrace + 1;
if (openBrace == NotFound || closeBrace == NotFound)
{
HasReachedEnd = true;
var start = Last?.End ?? 0;
var end = input.Length;
if (end - start > 0)
{
return(new BbTag
{
Type = BbCodeType.None,
Start = start,
End = end
});
}
return(null);
}
if (Last == null && openBrace > 0)
{
return(ReturnAsTextBetween(0, lastStart));
}
if (Last != null && lastStart - Last.End > 1)
{
return(ReturnAsTextBetween(Last.End, lastStart));
}
if (closeBrace < openBrace)
{
return(ReturnAsTextBetween(closeBrace, openBrace));
}
arguments = null;
var type = input.Substring(openBrace + 1, closeBrace - openBrace - 1);
var equalsSign = type.IndexOf('=');
if (equalsSign != NotFound)
{
var typeBeforeEquals = type.Substring(0, equalsSign);
arguments = type.Substring(equalsSign + 1, type.Length - equalsSign - 1).Trim();
type = typeBeforeEquals.Trim();
}
var isEndType = false;
if (type.Length > 1)
{
isEndType = type[0].Equals('/');
type = isEndType ? type.Substring(1) : type;
}
var possibleMatch = Types.Keys.FirstOrDefault(x => x.Equals(type, StringComparison.Ordinal));
if (possibleMatch == null)
{
return(NoResult());
}
Last = new BbTag
{
Arguments = arguments,
End = currentPosition,
Start = openBrace,
Type = Types[possibleMatch],
IsClosing = isEndType
};
return(Last);
}
public TagNode(BbTag tag) : this(tag, null)
{
}
private BbTag ReturnAsTextBetween(int start, int end)
{
if (end - start <= 1)
end = start + 2;
var toReturn = new BbTag
{
Type = BbCodeType.None,
Start = start,
End = end - 1
};
var rewindTo = Last != null ? Last.End : 0;
currentPosition = rewindTo;
Last = toReturn;
return toReturn;
}
private BbTag NoResult()
{
var toReturn = new BbTag
{
Start = lastStart - 1,
End = currentPosition,
Type = BbCodeType.None
};
Last = toReturn;
return toReturn;
}
public BbTag Next()
{
if (HasReachedEnd)
return NoResult();
var openBrace = input.IndexOf('[', currentPosition);
var closeBrace = input.IndexOf(']', currentPosition);
currentPosition = closeBrace + 1;
lastStart = openBrace + 1;
if (openBrace == NotFound || closeBrace == NotFound)
{
HasReachedEnd = true;
var start = Last != null ? Last.End : 0;
var end = input.Length;
if (end - start > 0)
{
return new BbTag
{
Type = BbCodeType.None,
Start = start,
End = end
};
}
return null;
}
if (Last == null && openBrace > 0)
return ReturnAsTextBetween(0, lastStart);
if (Last != null && lastStart - Last.End > 1)
return ReturnAsTextBetween(Last.End, lastStart);
if (closeBrace < openBrace)
return ReturnAsTextBetween(closeBrace, openBrace);
arguments = null;
var type = input.Substring(openBrace + 1, closeBrace - openBrace - 1);
var equalsSign = type.IndexOf('=');
if (equalsSign != NotFound)
{
var typeBeforeEquals = type.Substring(0, equalsSign);
arguments = type.Substring(equalsSign + 1, type.Length - equalsSign - 1).Trim();
type = typeBeforeEquals.Trim();
}
var isEndType = false;
if (type.Length > 1)
{
isEndType = type[0].Equals('/');
type = isEndType ? type.Substring(1) : type;
}
var possibleMatch = Types.Keys.FirstOrDefault(x => x.Equals(type, StringComparison.Ordinal));
if (possibleMatch == null)
return NoResult();
Last = new BbTag
{
Arguments = arguments,
End = currentPosition,
Start = openBrace,
Type = Types[possibleMatch],
IsClosing = isEndType
};
return Last;
}
internal static ParsedChunk FromTag(BbTag tag, string context)
{
var last = tag.ClosingTag != null ? tag.ClosingTag.End : tag.End;
var toReturn = new ParsedChunk
{
Start = tag.Start,
End = last,
Type = tag.Type,
Arguments = tag.Arguments
};
if (tag.Children != null && tag.Children.Any())
toReturn.Children = tag.Children.Select(x => FromTag(x, context)).ToList();
if (tag.Type == BbCodeType.None)
toReturn.InnerText = context.Substring(tag.Start, tag.End - tag.Start);
return toReturn;
}