57 lines
1.8 KiB
C#
57 lines
1.8 KiB
C#
using System.Collections.Generic;
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using System.Threading;
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using System.Windows.Media;
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using System.Windows.Threading;
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using NLog;
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using NLog.Targets;
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using Torch.Server.ViewModels;
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using Torch.Server.Views;
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namespace Torch.Server
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{
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/// <summary>
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/// NLog target that writes to a <see cref="LogViewerControl"/>.
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/// </summary>
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[Target("logViewer")]
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public sealed class LogViewerTarget : TargetWithLayout
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{
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public IList<LogEntry> LogEntries { get; set; }
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public SynchronizationContext TargetContext { get; set; }
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private const int MAX_LINES = 1000;
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/// <inheritdoc />
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protected override void Write(LogEventInfo logEvent)
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{
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TargetContext?.Post(_sendOrPostCallback, logEvent);
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}
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private void WriteCallback(object state)
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{
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var logEvent = (LogEventInfo) state;
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LogEntries?.Add(new(logEvent.TimeStamp, Layout.Render(logEvent), LogLevelColors[logEvent.Level]));
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if (LogEntries is not {Count: > MAX_LINES}) return;
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for (var i = 0; LogEntries.Count > MAX_LINES; i++)
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{
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LogEntries.RemoveAt(i);
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}
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}
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private static readonly Dictionary<LogLevel, SolidColorBrush> LogLevelColors = new()
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{
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[LogLevel.Trace] = new SolidColorBrush(Colors.DimGray),
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[LogLevel.Debug] = new SolidColorBrush(Colors.DarkGray),
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[LogLevel.Info] = new SolidColorBrush(Colors.White),
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[LogLevel.Warn] = new SolidColorBrush(Colors.Magenta),
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[LogLevel.Error] = new SolidColorBrush(Colors.Yellow),
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[LogLevel.Fatal] = new SolidColorBrush(Colors.Red),
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};
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private readonly SendOrPostCallback _sendOrPostCallback;
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public LogViewerTarget()
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{
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_sendOrPostCallback = WriteCallback;
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}
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}
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}
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