Merge pull request #765 from Artemis-RGB/feature/reduce-allocs

Random misc fixes

src/Artemis.Core/MVVM/CorePropertyChanged.cs

@@ -1,4 +1,5 @@
-using System.ComponentModel;
+using System.Collections.Generic;
+using System.ComponentModel;
 using System.Runtime.CompilerServices;
 using Artemis.Core.Properties;
 
@@ -26,7 +27,7 @@ public abstract class CorePropertyChanged : INotifyPropertyChanged
     [MethodImpl(MethodImplOptions.AggressiveInlining)]
     protected bool RequiresUpdate<T>(ref T storage, T value)
     {
-        return !Equals(storage, value);
+        return !EqualityComparer<T>.Default.Equals(storage, value);
     }
 
     /// <summary>

src/Artemis.Core/Plugins/LayerBrushes/PerLedLayerBrush.cs

@@ -28,6 +28,8 @@ public abstract class PerLedLayerBrush<T> : PropertiesLayerBrush<T> where T : La
     /// <returns>The color the LED will receive</returns>
     public abstract SKColor GetColor(ArtemisLed led, SKPoint renderPoint);
 
+    private readonly SKPoint[] _points = new SKPoint[2];
+    
     internal override void InternalRender(SKCanvas canvas, SKRect bounds, SKPaint paint)
     {
         // We don't want rotation on this canvas because that'll displace the LEDs, translations are applied to the points of each LED instead
@@ -37,25 +39,21 @@ public abstract class PerLedLayerBrush<T> : PropertiesLayerBrush<T> where T : La
         using SKPath pointsPath = new();
         foreach (ArtemisLed artemisLed in Layer.Leds)
         {
-            pointsPath.AddPoly(new[]
+            _points[0] = new SKPoint(0, 0);
-            {
+            _points[1] = new SKPoint(artemisLed.AbsoluteRectangle.Left - Layer.Bounds.Left, artemisLed.AbsoluteRectangle.Top - Layer.Bounds.Top);
-                new SKPoint(0, 0),
+            pointsPath.AddPoly(_points);
-                new SKPoint(artemisLed.AbsoluteRectangle.Left - Layer.Bounds.Left, artemisLed.AbsoluteRectangle.Top - Layer.Bounds.Top)
-            });
         }
 
         // Apply the translation to the points of each LED instead
         if (Layer.General.TransformMode.CurrentValue == LayerTransformMode.Normal && SupportsTransformation)
             pointsPath.Transform(Layer.GetTransformMatrix(true, true, true, true).Invert());
 
-        SKPoint[] points = pointsPath.Points;
-
         TryOrBreak(() =>
         {
             for (int index = 0; index < Layer.Leds.Count; index++)
             {
                 ArtemisLed artemisLed = Layer.Leds[index];
-                SKPoint renderPoint = points[index * 2 + 1];
+                SKPoint renderPoint = pointsPath.GetPoint(index * 2 + 1);
                 if (!float.IsFinite(renderPoint.X) || !float.IsFinite(renderPoint.Y))
                     continue;
 

src/Artemis.Core/Stores/LogStore.cs

@@ -10,12 +10,25 @@ namespace Artemis.Core;
 /// </summary>
 public static class LogStore
 {
+    private static readonly object _lock = new();
+    
     private static readonly LinkedList<LogEvent> LinkedList = new();
 
     /// <summary>
     ///     Gets a list containing the last 500 log events.
     /// </summary>
-    public static List<LogEvent> Events => LinkedList.ToList();
+    public static List<LogEvent> Events
+    {
+        get
+        {
+            List<LogEvent> events;
+            
+            lock (_lock)
+                events = LinkedList.ToList();
+            
+            return events;
+        }
+    }
 
     /// <summary>
     ///     Occurs when a new <see cref="LogEvent" /> was received.
@@ -24,9 +37,13 @@ public static class LogStore
 
     internal static void Emit(LogEvent logEvent)
     {
-        LinkedList.AddLast(logEvent);
+        lock (_lock)
-        while (LinkedList.Count > 500)
+        {
-            LinkedList.RemoveFirst();
+            LinkedList.AddLast(logEvent);
+            while (LinkedList.Count > 500)
+                LinkedList.RemoveFirst();
+        }
+
 
         OnEventAdded(new LogEventEventArgs(logEvent));
     }

src/Artemis.UI/Screens/Debugger/Tabs/Logs/LogsDebugView.axaml.cs

@@ -14,7 +14,7 @@ namespace Artemis.UI.Screens.Debugger.Logs;
 public class LogsDebugView : ReactiveUserControl<LogsDebugViewModel>
 {
     private int _lineCount;
-    private TextEditor _textEditor;
+    private TextEditor? _textEditor;
 
     public LogsDebugView()
     {
@@ -31,7 +31,7 @@ public class LogsDebugView : ReactiveUserControl<LogsDebugViewModel>
     protected override void OnInitialized()
     {
         base.OnInitialized();
-        Dispatcher.UIThread.Post(() => _textEditor.ScrollToEnd(), DispatcherPriority.ApplicationIdle);
+        Dispatcher.UIThread.Post(() => _textEditor?.ScrollToEnd(), DispatcherPriority.ApplicationIdle);
     }
 
     private void OnTextChanged(object? sender, EventArgs e)

src/Artemis.UI/Screens/Debugger/Tabs/Logs/LogsDebugViewModel.cs

@@ -48,8 +48,11 @@ public class LogsDebugViewModel : ActivatableViewModelBase
         });
     }
 
-    private void AddLogEvent(LogEvent logEvent)
+    private void AddLogEvent(LogEvent? logEvent)
     {
+        if (logEvent is null)
+            return;
+
         using StringWriter writer = new();
         _formatter.Format(logEvent, writer);
         string line = writer.ToString();
@@ -60,7 +63,7 @@ public class LogsDebugViewModel : ActivatableViewModelBase
 
     private void RemoveOldestLine()
     {
-        int firstNewLine = Document.Text.IndexOf('\n');
+        int firstNewLine = Document.IndexOf('\n', 0, Document.TextLength);
         if (firstNewLine == -1)
         {
             //this should never happen.

src/Artemis.UI/Screens/StartupWizard/StartupWizardViewModel.cs

@@ -52,7 +52,7 @@ public class StartupWizardViewModel : DialogViewModelBase<bool>
         DeviceProviders = new ObservableCollection<PluginViewModel>(pluginManagementService.GetAllPlugins()
             .Where(p => p.Info.IsCompatible && p.Features.Any(f => f.AlwaysEnabled && f.FeatureType.IsAssignableTo(typeof(DeviceProvider))))
             .OrderBy(p => p.Info.Name)
-            .Select(p => settingsVmFactory.PluginViewModel(p, null)));
+            .Select(p => settingsVmFactory.PluginViewModel(p, ReactiveCommand.Create(() => new Unit()))));
 
         CurrentStep = 1;
         SetupButtons();