public DocumentRange Translate(TreeTextRange range)
{
if (!range.IsValid() || !_sourceFile.IsValid())
{
return(DocumentRange.InvalidRange);
}
IncludeWithOffset atStart = FindIncludeAtOffset(range.StartOffset, true);
IncludeWithOffset atEnd = FindIncludeAtOffset(range.EndOffset, atStart.Include == null);
// two different parts are overlapping
IT4Include include = atStart.Include;
if (include != atEnd.Include)
{
return(DocumentRange.InvalidRange);
}
// recursive includes
if (include != null)
{
if (include.DocumentRangeTranslator != null)
{
return(include.DocumentRangeTranslator.Translate(range));
}
return(DocumentRange.InvalidRange);
}
int rootStartOffset = _root.GetTreeStartOffset().Offset;
return(new DocumentRange(_sourceFile.Document, new TextRange(atStart.Offset - rootStartOffset, atEnd.Offset - rootStartOffset)));
}
private IncludeWithOffset FindIncludeAtOffset(TreeOffset offset, bool preferRoot)
{
// no includes, tree and document are matching
if (_includes.Count == 0)
{
return(new IncludeWithOffset(offset.Offset));
}
int includesLength = 0;
int count = _includes.Count;
for (int i = 0; i < count; i++)
{
IT4Include include = _includes[i];
TreeTextRange includeRange = include.GetTreeTextRange();
// the offset is before the include, in the root file
if (offset < includeRange.StartOffset)
{
return(new IncludeWithOffset((offset - includesLength).Offset));
}
// the offset is inside the include
if (offset < includeRange.EndOffset)
{
// we're on an edge position: we can be just after the end of the root file,
// or just at the beginning of an include; we make the choice using the preferRoot parameter
if (offset == includeRange.StartOffset && preferRoot)
{
return(new IncludeWithOffset((offset - includesLength).Offset));
}
return(new IncludeWithOffset(offset - includeRange.StartOffset, include));
}
includesLength += includeRange.Length;
}
// the offset is after the include, in the root file
return(new IncludeWithOffset((offset - includesLength).Offset));
}
internal IncludeWithOffset(int offset, [CanBeNull] IT4Include include = null) {
Include = include;
Offset = offset;
}
internal IncludeWithOffset(int offset, [CanBeNull] IT4Include include = null)
{
Include = include;
Offset = offset;
}
