void UpdateAdornmentsWorker()
{
//var analysisLines = Analysis.Lines;
//if (Analysis.Snapshot != View.TextSnapshot) {
// var task = Analysis.Update();
// if (task != null) {
// UpdateAdornments(task);
// }
// return;
//} else if (analysisLines == null) {
// UpdateAdornments(Analysis.Reset());
// return;
//}
if (!GlobalVisible)
{
Canvas.Visibility = Visibility.Collapsed;
return;
}
Canvas.Visibility = Visibility.Visible;
var snapshot = View.TextSnapshot;
var viewModel = View.TextViewModel;
if (snapshot == null || viewModel == null)
{
return;
}
var firstVisibleLine = View.TextViewLines.FirstOrDefault(line => line.IsFirstTextViewLineForSnapshotLine);
if (firstVisibleLine == null)
{
return;
}
var lastVisibleLine = View.TextViewLines.LastOrDefault(line => line.IsLastTextViewLineForSnapshotLine);
if (lastVisibleLine == null)
{
return;
}
var analysisLines = Analysis.GetLines(
firstVisibleLine.Start.GetContainingLine().LineNumber,
lastVisibleLine.Start.GetContainingLine().LineNumber
);
if (!analysisLines.Any())
{
return;
}
#if PERFORMANCE
object cookie = null;
try {
PerformanceLogger.Start(ref cookie);
UpdateAdornments_Performance(
snapshot,
viewModel,
firstVisibleLine,
analysisLines
);
} catch (OperationCanceledException) {
PerformanceLogger.Mark("Cancel");
throw;
} finally {
PerformanceLogger.End(cookie);
}
}
protected override void OnPaint(PaintEventArgs e)
{
e.Graphics.Clear(!Checked ? BackColor : HighlightBackColor);
Color foreColor = !Checked ? ForeColor : HighlightForeColor;
double spaceLeft, spaceWidth;
using (var sf = new StringFormat()) {
RectangleF rect = ClientRectangle;
rect.Width *= 2.0f;
sf.SetMeasurableCharacterRanges(new[] { new CharacterRange(0, 16) });
var testString = VisibleWhitespace ? "················{" : " {";
var rgns = e.Graphics.MeasureCharacterRanges(testString, Font, rect, sf);
var bounds = rgns[0].GetBounds(e.Graphics);
spaceLeft = bounds.Left;
spaceWidth = bounds.Width / 16;
#if DEBUG
sf.Alignment = StringAlignment.Far;
rect.Width /= 2;
using (var brush = new SolidBrush(foreColor))
e.Graphics.DrawString(string.Format("{0}, {1}", spaceLeft, spaceWidth), Font, brush, rect, sf);
#endif
}
try {
if (Analysis == null || Analysis.Snapshot == null)
{
return;
}
var snapshot = Analysis.Snapshot.TextBuffer.CurrentSnapshot;
using (var brush = new SolidBrush(foreColor)) {
foreach (var line in snapshot.Lines)
{
var text = line.GetText();
if (VisibleWhitespace)
{
text = text.Replace(' ', '·');
}
e.Graphics.DrawString(text, Font, brush, 0, line.LineNumber * Font.Height);
}
}
if (Theme == null)
{
return;
}
var analysisLines = Analysis.GetLines(0, snapshot.LineCount);
foreach (var line in analysisLines)
{
float top = line.FirstLine * Font.Height;
float bottom = (line.LastLine + 1) * Font.Height;
float left = (float)Math.Floor(line.Indent * spaceWidth + spaceLeft);
bool glow;
using (var pen = GetLinePen(line.FormatIndex, out glow)) {
if (pen != null)
{
if (glow)
{
using (var transparentBrush = new SolidBrush(Color.FromArgb(24, pen.Color))) {
for (int i = 1; i < LineStyle.Thick.GetStrokeThickness(); ++i)
{
e.Graphics.FillRectangle(transparentBrush, left - i, top, i + i + 1, bottom - top);
}
}
}
e.Graphics.DrawLine(pen, left, top, left, bottom);
}
}
}
} catch (Exception ex) {
Trace.WriteLine("LineTextPreview::OnPaint Error");
Trace.WriteLine(" - Exception: " + ex.ToString());
using (var brush = new SolidBrush(foreColor)) {
e.Graphics.DrawString(ex.ToString(), Font, brush, 0.0f, 0.0f);
}
}
}
