private void UpdateCaret(VirtualSnapshotPoint caretPosition)
{
IEnumerable <LineSpan> analysisLines = Analysis.GetAllLines();
CaretHandlerBase caret = CaretHandlerBase.FromName(Theme.CaretHandler, caretPosition, Analysis.TabSize);
foreach (LineSpan line in analysisLines)
{
int linePos = line.Indent;
if (!Analysis.Behavior.VisibleUnaligned && linePos % Analysis.IndentSize != 0)
{
continue;
}
int formatIndex = line.Indent / Analysis.IndentSize;
if (line.Indent % Analysis.IndentSize != 0)
{
formatIndex = LineFormat.UnalignedFormatIndex;
}
caret.AddLine(line, false);
}
foreach (LineSpan line in caret.GetModified())
{
Line adornment;
if (Lines.TryGetValue(line, out adornment))
{
UpdateGuide(line, adornment);
}
}
}
void UpdateAdornments_Performance(
ITextSnapshot snapshot,
ITextViewModel viewModel,
ITextViewLine firstVisibleLine,
IEnumerable <LineSpan> analysisLines
)
{
#endif
double spaceWidth = firstVisibleLine.VirtualSpaceWidth;
if (spaceWidth <= 0.0)
{
return;
}
double horizontalOffset = firstVisibleLine.TextLeft;
HashSet <LineSpan> unusedLines = new HashSet <LineSpan>(Lines.Keys);
CaretHandlerBase caret = CaretHandlerBase.FromName(Theme.CaretHandler, View.Caret.Position.VirtualBufferPosition,
Analysis.TabSize);
object perfCookie = null;
PerformanceLogger.Start(ref perfCookie);
#if DEBUG
int initialCount = Lines.Count;
#endif
foreach (LineSpan line in analysisLines.Concat(GetPageWidthLines()))
{
double top = View.ViewportTop;
double bottom = View.ViewportBottom;
double left = line.Indent * spaceWidth + horizontalOffset;
Line adornment;
unusedLines.Remove(line);
if (line.Type == LineSpanType.PageWidthMarker)
{
line.Highlight = Analysis.LongestLine > line.Indent;
if (!Lines.TryGetValue(line, out adornment))
{
Lines[line] = adornment = CreateGuide(Canvas);
}
UpdateGuide(line, adornment, left, top, bottom);
continue;
}
if (Lines.TryGetValue(line, out adornment))
{
adornment.Visibility = Visibility.Hidden;
}
caret.AddLine(line, true);
if (line.FirstLine >= 0 && line.LastLine < int.MaxValue)
{
int firstLineNumber = line.FirstLine;
int lastLineNumber = line.LastLine;
ITextSnapshotLine firstLine, lastLine;
try
{
firstLine = snapshot.GetLineFromLineNumber(firstLineNumber);
lastLine = snapshot.GetLineFromLineNumber(lastLineNumber);
}
catch (Exception ex)
{
Trace.TraceError("In GetLineFromLineNumber:\n{0}", ex);
continue;
}
if (firstLine.Start > View.TextViewLines.LastVisibleLine.Start ||
lastLine.Start < View.TextViewLines.FirstVisibleLine.Start)
{
continue;
}
while (
!viewModel.IsPointInVisualBuffer(firstLine.Start, PositionAffinity.Successor) &&
++firstLineNumber < lastLineNumber
)
{
try
{
firstLine = snapshot.GetLineFromLineNumber(firstLineNumber);
}
catch (Exception ex)
{
Trace.TraceError("In GetLineFromLineNumber:\n{0}", ex);
firstLine = null;
break;
}
}
while (
!viewModel.IsPointInVisualBuffer(lastLine.Start, PositionAffinity.Predecessor) &&
--lastLineNumber > firstLineNumber
)
{
try
{
lastLine = snapshot.GetLineFromLineNumber(lastLineNumber);
}
catch (Exception ex)
{
Trace.TraceError("In GetLineFromLineNumber:\n{0}", ex);
lastLine = null;
break;
}
}
if (firstLine == null || lastLine == null || firstLineNumber > lastLineNumber)
{
continue;
}
IWpfTextViewLine firstView, lastView;
try
{
firstView = View.GetTextViewLineContainingBufferPosition(firstLine.Start);
lastView = View.GetTextViewLineContainingBufferPosition(lastLine.End);
}
catch (Exception ex)
{
Trace.TraceError("UpdateAdornments GetTextViewLineContainingBufferPosition failed\n{0}", ex);
continue;
}
string extentText;
if (!string.IsNullOrWhiteSpace(extentText = firstView.Extent.GetText()) &&
line.Indent > extentText.LeadingWhitespace(Analysis.TabSize)
)
{
continue;
}
if (firstView.VisibilityState != VisibilityState.Unattached)
{
top = firstView.Top;
}
if (lastView.VisibilityState != VisibilityState.Unattached)
{
bottom = lastView.Bottom;
}
}
if (!Lines.TryGetValue(line, out adornment))
{
Lines[line] = adornment = CreateGuide(Canvas);
}
UpdateGuide(line, adornment, left, top, bottom);
}
PerformanceLogger.End(perfCookie);
#if DEBUG
Debug.WriteLine("Added {0} guides", Lines.Count - initialCount);
Debug.WriteLine("Removed {0} guides", unusedLines.Count);
Debug.WriteLine("{0} guides active", Lines.Count - unusedLines.Count);
Debug.WriteLine("");
#endif
foreach (LineSpan line in unusedLines)
{
Line adornment;
if (Lines.TryGetValue(line, out adornment))
{
Canvas.Children.Remove(adornment);
Lines.Remove(line);
}
}
foreach (LineSpan line in caret.GetModified())
{
Line adornment;
if (Lines.TryGetValue(line, out adornment))
{
UpdateGuide(line, adornment);
}
}
}