55 lines
1.9 KiB
C#
55 lines
1.9 KiB
C#
using System;
|
|
using System.Collections.Generic;
|
|
using System.Linq;
|
|
using System.Text;
|
|
using System.Threading.Tasks;
|
|
using System.Windows.Documents;
|
|
using System.Windows.Media;
|
|
using NLog;
|
|
using NLog.Targets;
|
|
|
|
namespace Torch.Server
|
|
{
|
|
/// <summary>
|
|
/// NLog target that writes to a <see cref="FlowDocument"/>.
|
|
/// </summary>
|
|
[Target("flowDocument")]
|
|
public sealed class FlowDocumentTarget : TargetWithLayout
|
|
{
|
|
private FlowDocument _document = new FlowDocument { Background = new SolidColorBrush(Colors.Black) };
|
|
private readonly Paragraph _paragraph = new Paragraph();
|
|
private readonly int _maxLines = 500;
|
|
|
|
public FlowDocument Document => _document;
|
|
|
|
public FlowDocumentTarget()
|
|
{
|
|
_document.Blocks.Add(_paragraph);
|
|
}
|
|
|
|
/// <inheritdoc />
|
|
protected override void Write(LogEventInfo logEvent)
|
|
{
|
|
_document.Dispatcher.BeginInvoke(() =>
|
|
{
|
|
var message = $"{Layout.Render(logEvent)}\n";
|
|
_paragraph.Inlines.Add(new Run(message) {Foreground = LogLevelColors[logEvent.Level]});
|
|
|
|
// A massive paragraph slows the UI down
|
|
if (_paragraph.Inlines.Count > _maxLines)
|
|
_paragraph.Inlines.Remove(_paragraph.Inlines.FirstInline);
|
|
});
|
|
}
|
|
|
|
private static readonly Dictionary<LogLevel, SolidColorBrush> LogLevelColors = new Dictionary<LogLevel, SolidColorBrush>
|
|
{
|
|
[LogLevel.Trace] = new SolidColorBrush(Colors.DimGray),
|
|
[LogLevel.Debug] = new SolidColorBrush(Colors.DarkGray),
|
|
[LogLevel.Info] = new SolidColorBrush(Colors.White),
|
|
[LogLevel.Warn] = new SolidColorBrush(Colors.Magenta),
|
|
[LogLevel.Error] = new SolidColorBrush(Colors.Yellow),
|
|
[LogLevel.Fatal] = new SolidColorBrush(Colors.Red),
|
|
};
|
|
}
|
|
}
|