public ITextSnapshotLine GetLineFromPosition(int position)
{
if (TextBuffer.IsSafeToAccessDocumentFromSnapshot(this))
{
var docLine = TextBuffer.Document.GetLineByOffset(position);
return(new TextSnapshotLine(this, docLine.LineNumber - 1, docLine.Offset, docLine.Length, docLine.DelimiterLength));
}
return(GetLineFromLineNumber(GetLineNumberFromPosition(position)));
}
public TextImageLine GetLineFromLineNumber(int lineNumber)
{
if (TextBuffer.IsSafeToAccessDocumentFromSnapshot(this))
{
var docLine = TextBuffer.Document.GetLineByNumber(lineNumber + 1);
return(new TextImageLine(this, lineNumber, new Span(docLine.Offset, docLine.Length), docLine.DelimiterLength));
}
if (lineOffsets is null)
{
lineOffsets = TextImageUtils.CreateLineOffsets(this);
}
TextImageUtils.GetLineInfo(lineOffsets, lineNumber, Length, out int start, out int end, out int lineBreakLength);
return(new TextImageLine(this, lineNumber, new Span(start, end - start), lineBreakLength));
}
public int GetLineNumberFromPosition(int position)
{
if ((uint)position > (uint)Length)
{
throw new ArgumentOutOfRangeException(nameof(position));
}
if (TextBuffer.IsSafeToAccessDocumentFromSnapshot(this))
{
return(TextBuffer.Document.GetLineByOffset(position).LineNumber - 1);
}
if (lineOffsets is null)
{
lineOffsets = TextImageUtils.CreateLineOffsets(this);
}
return(TextImageUtils.GetLineNumberFromPosition(lineOffsets, position, Length));
}
public int GetLineNumberFromPosition(int position)
{
if ((uint)position > (uint)Length)
{
throw new ArgumentOutOfRangeException(nameof(position));
}
if (TextBuffer.IsSafeToAccessDocumentFromSnapshot(this))
{
return(TextBuffer.Document.GetLineByOffset(position).LineNumber - 1);
}
if (lineOffsets == null)
{
lineOffsets = CreateLineOffsets();
}
var array = lineOffsets;
if (position == Length)
{
return(array.Length - 1);
}
int lo = 0, hi = array.Length - 1;
while (lo <= hi)
{
int lineNo = (lo + hi) / 2;
int start = (int)(array[lineNo] & OFFSET_MASK);
int end = lineNo + 1 < array.Length ? (int)(array[lineNo + 1] & OFFSET_MASK) : Length;
if (position < start)
{
hi = lineNo - 1;
}
else if (position >= end)
{
lo = lineNo + 1;
}
else
{
return(lineNo);
}
}
throw new ArgumentOutOfRangeException(nameof(position));
}
public ITextSnapshotLine GetLineFromLineNumber(int lineNumber)
{
if (TextBuffer.IsSafeToAccessDocumentFromSnapshot(this))
{
var docLine = TextBuffer.Document.GetLineByNumber(lineNumber + 1);
return(new TextSnapshotLine(this, lineNumber, docLine.Offset, docLine.Length, docLine.DelimiterLength));
}
if (lineOffsets == null)
{
lineOffsets = CreateLineOffsets();
}
var array = lineOffsets;
if ((uint)lineNumber >= (uint)array.Length)
{
throw new ArgumentOutOfRangeException(nameof(lineNumber));
}
int start = (int)(array[lineNumber] & OFFSET_MASK);
int lineBreakLength = (int)(array[lineNumber] >> LINEBREAK_SHIFT);
int end = (lineNumber + 1 < array.Length ? (int)(array[lineNumber + 1] & OFFSET_MASK) : Length) - lineBreakLength;
return(new TextSnapshotLine(this, lineNumber, start, end - start, lineBreakLength));
}
