Handle text editor line changed event to detect user is not idling

Author: Reavert

VisualStudioDiscordRPC.Shared/DiscordRpcController.cs

@@ -6,8 +6,7 @@
 using VisualStudioDiscordRPC.Shared.Plugs;
 using VisualStudioDiscordRPC.Shared.Nests;
 using VisualStudioDiscordRPC.Shared.Nests.Base;
-using System.Windows;
-using VisualStudioDiscordRPC.Shared.Plugs.TimerPlugs;
+using VisualStudioDiscordRPC.Shared.Observers;
 
 namespace VisualStudioDiscordRPC.Shared
 {
@@ -25,6 +24,7 @@ public class DiscordRpcController
         private readonly DiscordRpcClient _discordRpcClient;
         private readonly LocalizationService _localizationService;
         private readonly SettingsService _settingsService;
+        private readonly VsObserver _vsObserver;
 
         private readonly RichPresence _sharedRichPresence;
         private readonly object _richPresenceSync = new object();
@@ -102,6 +102,7 @@ static DiscordRpcController()
         public DiscordRpcController(int updateMillisecondsTimeout) 
         {
             _settingsService = ServiceRepository.Default.GetService<SettingsService>();
+            _vsObserver = ServiceRepository.Default.GetService<VsObserver>();
 
             var applicationId = _settingsService.Read<string>(SettingsKeys.ApplicationID);
 
@@ -152,6 +153,8 @@ public void Initialize()
             {
                 nest.Changed += OnNestChanged;
             }
+
+            _vsObserver.TextEditorLineChanged += OnTextEditorLineChanged;
         }
 
         public void Dispose()
@@ -168,6 +171,8 @@ public void Dispose()
                 _sendingThreadCancellation = true;
                 _discordRpcClient.Dispose();
             }
+
+            _vsObserver.TextEditorLineChanged -= OnTextEditorLineChanged;
         }
 
         public void SetPlug<TNest>(BasePlug plug) where TNest : BaseNest
@@ -214,6 +219,12 @@ private void OnNestChanged()
             SetDirty();
         }
 
+        private void OnTextEditorLineChanged(EnvDTE.TextPoint startPoint, EnvDTE.TextPoint endPoint, int hint)
+        {
+            if (_enabled && _isIdling)
+                SetDirty();
+        }
+
         public void RefreshAll()
         {
             foreach (BaseNest nest in Nests)

VisualStudioDiscordRPC.Shared/Observers/ObserverDelegates.cs

@@ -6,4 +6,5 @@ namespace VisualStudioDiscordRPC.Shared.Observers
     public delegate void DocumentChangedHandler(Document document);
     public delegate void ProjectChangedHandler(Project project);
     public delegate void SolutionChangedHandler(Solution solution);
+    public delegate void TextEditorLineChangedHandler(TextPoint startPoint, TextPoint endPoint, int hint);
 }

VisualStudioDiscordRPC.Shared/Observers/VsObserver.cs

@@ -1,7 +1,6 @@
 using EnvDTE;
 using EnvDTE80;
 using Microsoft.VisualStudio.Shell;
-using System;
 
 namespace VisualStudioDiscordRPC.Shared.Observers
 {
@@ -11,13 +10,16 @@ public class VsObserver : IObserver
         public event DocumentChangedHandler DocumentChanged;
         public event ProjectChangedHandler ProjectChanged;
         public event SolutionChangedHandler SolutionChanged;
+        public event TextEditorLineChangedHandler TextEditorLineChanged;
 
         private readonly DTE2 _dte;
         public DTE2 DTE => _dte;
 
         private string _lastSolutionName;
         private Project _lastProject;
 
+        private TextEditorEvents _textEditorEvents;
+
         public VsObserver(DTE2 dte)
         {
             _dte = dte;
@@ -28,13 +30,17 @@ public void Observe()
             ThreadHelper.ThrowIfNotOnUIThread();
 
             _dte.Events.WindowEvents.WindowActivated += OnWindowActivated;
+
+            _textEditorEvents = _dte.Events.TextEditorEvents;
+            _textEditorEvents.LineChanged += OnTextEditorLineChanged;
         }
 
         public void Unobserve()
         {
             ThreadHelper.ThrowIfNotOnUIThread();
 
             _dte.Events.WindowEvents.WindowActivated -= OnWindowActivated;
+            _textEditorEvents.LineChanged -= OnTextEditorLineChanged;
         }
 
         private void OnWindowActivated(Window gotFocus, Window lostFocus)
@@ -78,5 +84,10 @@ private void OnWindowActivated(Window gotFocus, Window lostFocus)
                 }
             }
         }
+
+        private void OnTextEditorLineChanged(TextPoint startPoint, TextPoint endPoint, int hint)
+        {
+            TextEditorLineChanged?.Invoke(startPoint, endPoint, hint);
+        }
     }
 }