public static SelectionResult Create(TextLineCollection lines, TextSpan span)
{
using (TextLineCollection.Enumerator en = lines.GetEnumerator())
{
if (en.MoveNext())
{
int i = 0;
while (span.Start >= en.Current.EndIncludingLineBreak &&
en.MoveNext())
{
i++;
}
if (span.Start == en.Current.Start)
{
int j = i;
while (span.End > en.Current.EndIncludingLineBreak &&
en.MoveNext())
{
j++;
}
if (span.End == en.Current.End ||
span.End == en.Current.EndIncludingLineBreak)
{
return(new SelectionResult(i, j));
}
}
}
}
return(Fail);
}
private static (int startIndex, int endIndex) GetIndexes(TextLineCollection lines, TextSpan span)
{
using (TextLineCollection.Enumerator en = lines.GetEnumerator())
{
if (en.MoveNext())
{
int i = 0;
while (span.Start >= en.Current.EndIncludingLineBreak &&
en.MoveNext())
{
i++;
}
if (span.Start == en.Current.Start)
{
int j = i;
while (span.End > en.Current.EndIncludingLineBreak &&
en.MoveNext())
{
j++;
}
if (span.End == en.Current.End ||
span.End == en.Current.EndIncludingLineBreak)
{
return(i, j);
}
}
}
}
return(-1, -1);
}
public TextLineCollectionSelection(TextLineCollection lines, TextSpan span)
{
if (lines == null)
{
throw new ArgumentNullException(nameof(lines));
}
UnderlyingLines = lines;
Span = span;
using (TextLineCollection.Enumerator en = UnderlyingLines.GetEnumerator())
{
if (en.MoveNext())
{
int i = 0;
while (Span.Start >= en.Current.EndIncludingLineBreak &&
en.MoveNext())
{
i++;
}
if (Span.Start == en.Current.Start)
{
int j = i;
while (Span.End > en.Current.EndIncludingLineBreak &&
en.MoveNext())
{
j++;
}
if (Span.End == en.Current.End ||
Span.End == en.Current.EndIncludingLineBreak)
{
StartIndex = i;
EndIndex = j;
}
}
}
}
}
private bool FindSelectedLines()
{
using (TextLineCollection.Enumerator en = UnderlyingLines.GetEnumerator())
{
if (en.MoveNext())
{
int i = 0;
while (Span.Start >= en.Current.EndIncludingLineBreak &&
en.MoveNext())
{
i++;
}
if (Span.Start == en.Current.Start)
{
int j = i;
while (Span.End > en.Current.EndIncludingLineBreak &&
en.MoveNext())
{
j++;
}
if (Span.End == en.Current.End ||
Span.End == en.Current.EndIncludingLineBreak)
{
_firstIndex = i;
_lastIndex = j;
}
}
}
}
return(false);
}
