/// <summary>
/// Create <see cref="NewFolding"/>s for the specified document.
/// </summary>
public IEnumerable <NewFolding> CreateNewFoldings(TextDocument document, XmlReader reader, out int firstErrorOffset)
{
Stack <XmlFoldStart> stack = new Stack <XmlFoldStart>();
List <NewFolding> foldMarkers = new List <NewFolding>();
try
{
while (reader.Read())
{
switch (reader.NodeType)
{
case XmlNodeType.Element:
if (!reader.IsEmptyElement)
{
XmlFoldStart newFoldStart = CreateElementFoldStart(document, reader);
stack.Push(newFoldStart);
}
break;
case XmlNodeType.EndElement:
XmlFoldStart foldStart = stack.Pop();
CreateElementFold(document, foldMarkers, reader, foldStart);
break;
case XmlNodeType.Comment:
CreateCommentFold(document, foldMarkers, reader);
break;
}
}
firstErrorOffset = -1;
}
catch (XmlException ex)
{
// ignore errors at invalid positions (prevent ArgumentOutOfRangeException)
if (ex.LineNumber >= 1 && ex.LineNumber <= document.LineCount)
{
firstErrorOffset = document.GetOffset(ex.LineNumber, ex.LinePosition);
}
else
{
firstErrorOffset = 0;
}
}
foldMarkers.Sort((a, b) => a.StartOffset.CompareTo(b.StartOffset));
return(foldMarkers);
}
/// <summary>
/// Creates an XmlFoldStart for the start tag of an element.
/// </summary>
XmlFoldStart CreateElementFoldStart(TextDocument document, XmlReader reader)
{
// Take off 1 from the offset returned
// from the xml since it points to the start
// of the element name and not the beginning
// tag.
//XmlFoldStart newFoldStart = new XmlFoldStart(reader.Prefix, reader.LocalName, reader.LineNumber - 1, reader.LinePosition - 2);
XmlFoldStart newFoldStart = new XmlFoldStart();
IXmlLineInfo lineInfo = (IXmlLineInfo)reader;
newFoldStart.StartLine = lineInfo.LineNumber;
newFoldStart.StartOffset = document.GetOffset(newFoldStart.StartLine, lineInfo.LinePosition - 1);
if (this.ShowAttributesWhenFolded && reader.HasAttributes)
{
newFoldStart.Name = String.Concat("<", reader.Name, " ", GetAttributeFoldText(reader), ">");
}
else
{
newFoldStart.Name = String.Concat("<", reader.Name, ">");
}
return(newFoldStart);
}
/// <summary>
/// Create an element fold if the start and end tag are on
/// different lines.
/// </summary>
static void CreateElementFold(TextDocument document, List <NewFolding> foldMarkers, XmlReader reader, XmlFoldStart foldStart)
{
IXmlLineInfo lineInfo = (IXmlLineInfo)reader;
int endLine = lineInfo.LineNumber;
if (endLine > foldStart.StartLine)
{
int endCol = lineInfo.LinePosition + reader.Name.Length + 1;
foldStart.EndOffset = document.GetOffset(endLine, endCol);
foldMarkers.Add(foldStart);
}
}