UI - Added debugger log tab (#753)

src/Artemis.Core/Models/Profile/Colors/ColorGradient.cs

@@ -241,7 +241,16 @@ public class ColorGradient : IList<ColorGradientStop>, IList, INotifyCollectionC
             return _stops[^1].Color;
 
         //find the first stop after the position
-        int stop2Index = _stops.FindIndex(s => s.Position >= position);
+        int stop2Index = 0;
+
+        for (int i = 0; i < _stops.Count; i++)
+        {
+            if (_stops[i].Position >= position)
+            {
+                stop2Index = i;
+                break;
+            }
+        }
         //if the position is before the first stop, return that color
         if (stop2Index == 0)
             return _stops[0].Color;

src/Artemis.UI.Shared/Services/Window/WindowService.cs

@@ -33,8 +33,6 @@ internal class WindowService : IWindowService
 
     public Window ShowWindow(object viewModel)
     {
-        Window? parent = GetCurrentWindow();
-
         string name = viewModel.GetType().FullName!.Split('`')[0].Replace("ViewModel", "View");
         Type? type = viewModel.GetType().Assembly.GetType(name);
 
@@ -46,10 +44,7 @@ internal class WindowService : IWindowService
 
         Window window = (Window) Activator.CreateInstance(type)!;
         window.DataContext = viewModel;
-        if (parent != null)
-            window.Show(parent);
-        else
-            window.Show();
+        window.Show();
 
         return window;
     }

src/Artemis.UI/Artemis.UI.csproj

@@ -15,6 +15,7 @@
 
     <ItemGroup>
         <PackageReference Include="Avalonia" Version="0.10.18" />
+        <PackageReference Include="Avalonia.AvaloniaEdit" Version="0.10.12.2" />
         <PackageReference Include="Avalonia.Controls.PanAndZoom" Version="10.14.0" />
         <PackageReference Include="Avalonia.Controls.Skia" Version="0.10.16" />
         <PackageReference Include="Avalonia.Desktop" Version="0.10.18" />

src/Artemis.UI/Screens/Debugger/DebugView.axaml

@@ -15,6 +15,7 @@
                      Height="800">
 
     <Window.Styles>
+        <StyleInclude Source="avares://AvaloniaEdit/AvaloniaEdit.xaml" />
         <Style Selector="StackPanel.sidebar-stackpanel avalonia|MaterialIcon">
             <Setter Property="Margin" Value="-7 0 0 0" />
         </Style>

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

@@ -2,15 +2,25 @@
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             xmlns:aedit="https://github.com/avaloniaui/avaloniaedit"
+             xmlns:controls="clr-namespace:Artemis.UI.Controls"
+             xmlns:logs="clr-namespace:Artemis.UI.Screens.Debugger.Logs"
              mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
-             x:Class="Artemis.UI.Screens.Debugger.Logs.LogsDebugView">
-    <StackPanel>
-        <TextBlock Classes="h3">Logs</TextBlock>
-        <TextBlock TextWrapping="Wrap">
-            On this page you can view Artemis's logs in real-time. Logging can come from Artemis itself, plugins and scripts.
-        </TextBlock>
+             x:Class="Artemis.UI.Screens.Debugger.Logs.LogsDebugView"
+             x:DataType="logs:LogsDebugViewModel">
+  <aedit:TextEditor Name="log"
+                    Document="{ CompiledBinding Document }"
+                    IsReadOnly="True"
+                    FontFamily="Consolas"
+                    FontSize="12"
+                    HorizontalScrollBarVisibility="Auto"
+                    Padding="0 15 15 15"
+                    TextChanged="OnTextChanged" >
 
-        <TextBlock Margin="0 20 0 0">TODO as there's no FlowDocumentScrollViewer in Avalonia and I'm too lazy to come up with an alternative.</TextBlock>
-        <TextBlock Classes="subtitle">#feelsbadman</TextBlock>
-    </StackPanel>
+    <aedit:TextEditor.Styles>
+      <Style Selector="aedit|TextArea">
+        <Setter Property="SelectionBrush" Value="#44ffffff" />
+      </Style>
+    </aedit:TextEditor.Styles>
+  </aedit:TextEditor>
 </UserControl>

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

@@ -1,17 +1,68 @@
+using System;
+using System.Diagnostics;
+using System.Reflection;
+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Controls.Primitives;
 using Avalonia.Markup.Xaml;
 using Avalonia.ReactiveUI;
+using Avalonia.Threading;
+using AvaloniaEdit;
 
 namespace Artemis.UI.Screens.Debugger.Logs;
 
 public class LogsDebugView : ReactiveUserControl<LogsDebugViewModel>
 {
+    private int _lineCount;
+    private TextEditor _textEditor;
+
     public LogsDebugView()
     {
+        _lineCount = 0;
         InitializeComponent();
     }
 
     private void InitializeComponent()
     {
         AvaloniaXamlLoader.Load(this);
+        _textEditor = this.FindControl<TextEditor>("log");
+    }
+
+    protected override void OnInitialized()
+    {
+        base.OnInitialized();
+        Dispatcher.UIThread.Post(() => _textEditor.ScrollToEnd(), DispatcherPriority.ApplicationIdle);
+    }
+
+    private void OnTextChanged(object? sender, EventArgs e)
+    {
+        if (_textEditor is null)
+            return;
+        if (_textEditor.ExtentHeight == 0)
+            return;
+
+        int linesAdded = _textEditor.LineCount - _lineCount;
+        double lineHeight = _textEditor.ExtentHeight / _textEditor.LineCount;
+        double outOfScreenTextHeight = _textEditor.ExtentHeight - _textEditor.VerticalOffset - _textEditor.ViewportHeight;
+        double outOfScreenLines = outOfScreenTextHeight / lineHeight;
+
+        //we need this help distance because of rounding.
+        //if we scroll slightly above the end, we still want it
+        //to scroll down to the new lines.
+        const double graceDistance = 1d;
+
+        //if we were at the bottom of the log and
+        //if the last log event was 5 lines long
+        //we will be 5 lines out sync.
+        //if this is the case, scroll down.
+
+        //if we are more than that out of sync,
+        //the user scrolled up and we should not
+        //mess with anything.
+        if (_lineCount == 0 || linesAdded + graceDistance >  outOfScreenLines)
+        {
+            Dispatcher.UIThread.Post(() => _textEditor.ScrollToEnd(), DispatcherPriority.ApplicationIdle);
+            _lineCount = _textEditor.LineCount;
+        }
     }
 }

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

@@ -1,11 +1,74 @@
-using Artemis.UI.Shared;
+using Artemis.Core;
+using Artemis.UI.Shared;
+using Avalonia.Threading;
+using AvaloniaEdit.Document;
+using ReactiveUI;
+using Serilog.Events;
+using Serilog.Formatting.Display;
+using System.IO;
+using System.Reactive.Disposables;
 
 namespace Artemis.UI.Screens.Debugger.Logs;
 
 public class LogsDebugViewModel : ActivatableViewModelBase
 {
+    private readonly MessageTemplateTextFormatter _formatter;
+
+    public TextDocument Document { get; }
+
+    private const int MAX_ENTRIES = 1000;
+    
     public LogsDebugViewModel()
     {
         DisplayName = "Logs";
+        Document = new TextDocument();
+        _formatter = new MessageTemplateTextFormatter(
+            "[{Timestamp:yyyy-MM-dd HH:mm:ss.fff}] [{Level:u3}] [{SourceContext}] {Message:lj}{NewLine}{Exception}"
+        );
+
+        foreach(LogEvent logEvent in LogStore.Events)
+            AddLogEvent(logEvent);
+        
+        this.WhenActivated(disp =>
+        {        
+            LogStore.EventAdded += OnLogEventAdded;
+
+            Disposable.Create(() =>
+            {
+                LogStore.EventAdded -= OnLogEventAdded;
+            }).DisposeWith(disp);
+        });
+    }
+
+    private void OnLogEventAdded(object? sender, LogEventEventArgs e)
+    {
+        Dispatcher.UIThread.Post(() =>
+        {
+            AddLogEvent(e.LogEvent);
+        });
+    }
+
+    private void AddLogEvent(LogEvent logEvent)
+    {
+        using StringWriter writer = new();
+        _formatter.Format(logEvent, writer);
+        string line = writer.ToString();
+        Document.Insert(Document.TextLength, '\n' + line.TrimEnd('\r', '\n'));
+        while (Document.LineCount > MAX_ENTRIES)
+            RemoveOldestLine();
+    }
+
+    private void RemoveOldestLine()
+    {
+        int firstNewLine = Document.Text.IndexOf('\n');
+        if (firstNewLine == -1)
+        {
+            //this should never happen.
+            //just in case let's return
+            //instead of throwing
+            return;
+        }      
+        
+        Document.Remove(0, firstNewLine + 1);
     }
 }

src/Artemis.UI/Screens/Debugger/Tabs/Render/RenderDebugView.axaml

@@ -25,20 +25,13 @@
         </StackPanel>
 
         <Border Classes="card" Padding="10">
-            <ZoomBorder Name="ZoomBorder"
-                        Stretch="None"
-                        ClipToBounds="True"
-                        Focusable="True"
-                        VerticalAlignment="Stretch"
-                        HorizontalAlignment="Stretch">
-                <Image Name="Visualization" Source="{Binding CurrentFrame}">
-                    <Image.Transitions>
-                        <Transitions>
-                            <TransformOperationsTransition Property="RenderTransform" Duration="0:0:0.2" Easing="CubicEaseOut" />
-                        </Transitions>
-                    </Image.Transitions>
-                </Image>
-            </ZoomBorder>
+          <Image Name="Visualization" Source="{Binding CurrentFrame}">
+            <Image.Transitions>
+              <Transitions>
+                <TransformOperationsTransition Property="RenderTransform" Duration="0:0:0.2" Easing="CubicEaseOut" />
+              </Transitions>
+            </Image.Transitions>
+          </Image>
         </Border>
     </StackPanel>
 </UserControl>

src/Artemis.VisualScripting/Nodes/Branching/EnumSwitchNode.cs

@@ -66,6 +66,9 @@ public class EnumSwitchNode : Node
             return;
 
         Type enumType = SwitchValue.ConnectedTo[0].Type;
+        if (!enumType.IsEnum)
+            return;
+
         foreach (Enum enumValue in Enum.GetValues(enumType).Cast<Enum>())
         {
             InputPin pin = CreateOrAddInputPin(typeof(object), enumValue.ToString().Humanize(LetterCasing.Sentence));

src/Artemis.VisualScripting/Nodes/Color/SortedGradient.cs

@@ -7,6 +7,7 @@ namespace Artemis.VisualScripting.Nodes.Color
     [Node("Sorted Gradient", "Generates a sorted gradient from the given colors", "Color", InputType = typeof(SKColor), OutputType = typeof(ColorGradient))]
     public class SortedGradientNode : Node
     {
+        private int lastComputedColorGroup;
         public InputPinCollection<SKColor> Inputs { get; }
         public OutputPin<ColorGradient> Output { get; }
 
@@ -14,10 +15,15 @@ namespace Artemis.VisualScripting.Nodes.Color
         {
             Inputs = CreateInputPinCollection<SKColor>();
             Output = CreateOutputPin<ColorGradient>();
+            lastComputedColorGroup = 0;
         }
 
         public override void Evaluate()
         {
+            int newHash = GetInputColorHash();
+            if (newHash == lastComputedColorGroup)
+                return;
+            
             SKColor[] colors = Inputs.Values.ToArray();
 
             if (colors.Length == 0)
@@ -35,6 +41,17 @@ namespace Artemis.VisualScripting.Nodes.Color
             }
 
             Output.Value = gradient;
+            lastComputedColorGroup = newHash;
+        }
+        
+        private int GetInputColorHash()
+        {
+            int hash = 0;
+            
+            foreach (SKColor color in Inputs.Values)
+                hash = HashCode.Combine(hash, color.GetHashCode());
+
+            return hash;
         }
     }
 }