[PTRun][Settings][Program] Fix 100% CPU load issue (#17414)

* [PTRun][Program]Don't reload on settings change

* [PTRun][Settings] Don't trigger saves on visual property changes

* [PTRun][Settings] Fix manipulation of searched plugins

* [PTRun][Settings] Don't reload settings if we wrote recently

* fix PR comments nit

src/modules/launcher/Plugins/Microsoft.Plugin.Program/Main.cs

@@ -19,7 +19,7 @@ using Stopwatch = Wox.Infrastructure.Stopwatch;
 
 namespace Microsoft.Plugin.Program
 {
-    public class Main : IPlugin, IPluginI18n, IContextMenu, ISavable, IReloadable, IDisposable
+    public class Main : IPlugin, IPluginI18n, IContextMenu, ISavable, IDisposable
     {
         // The order of this array is important! The Parsers will be checked in order (index 0 to index Length-1) and the first parser which is able to parse the Query will be used
         // NoArgumentsArgumentParser does always succeed and therefor should always be last/fallback
@@ -194,11 +194,6 @@ namespace Microsoft.Plugin.Program
             }
         }
 
-        public void ReloadData()
-        {
-            IndexPrograms();
-        }
-
         public void Dispose()
         {
             Dispose(disposing: true);

src/settings-ui/Settings.UI.Library/ViewModels/PowerLauncherViewModel.cs

@@ -104,6 +104,15 @@ namespace Microsoft.PowerToys.Settings.UI.Library.ViewModels
 
         private void OnPluginInfoChange(object sender, PropertyChangedEventArgs e)
         {
+            if (
+                e.PropertyName == nameof(PowerLauncherPluginViewModel.ShowNotAccessibleWarning)
+                || e.PropertyName == nameof(PowerLauncherPluginViewModel.ShowNotAllowedKeywordWarning)
+                )
+            {
+                // Don't trigger a settings update if the changed property is for visual notification.
+                return;
+            }
+
             OnPropertyChanged(nameof(ShowAllPluginsDisabledWarning));
             UpdateSettings();
         }
@@ -430,6 +439,10 @@ namespace Microsoft.PowerToys.Settings.UI.Library.ViewModels
             {
                 var plugins = settings.Plugins.Where(p => p.Name.StartsWith(SearchText, StringComparison.OrdinalIgnoreCase) || p.Name.IndexOf($" {SearchText}", StringComparison.OrdinalIgnoreCase) > 0);
                 _plugins = new ObservableCollection<PowerLauncherPluginViewModel>(plugins.Select(x => new PowerLauncherPluginViewModel(x, isDark)));
+                foreach (var plugin in _plugins)
+                {
+                    plugin.PropertyChanged += OnPluginInfoChange;
+                }
             }
             else
             {

src/settings-ui/Settings.UI/Views/PowerLauncherPage.xaml.cs

@@ -19,15 +19,31 @@ namespace Microsoft.PowerToys.Settings.UI.Views
         private readonly ObservableCollection<Tuple<string, string>> searchResultPreferencesOptions;
         private readonly ObservableCollection<Tuple<string, string>> searchTypePreferencesOptions;
 
+        private int _lastIPCMessageSentTick;
+
+        // Keep track of the last IPC Message that was sent.
+        private int SendDefaultIPCMessageTimed(string msg)
+        {
+            _lastIPCMessageSentTick = Environment.TickCount;
+            return ShellPage.SendDefaultIPCMessage(msg);
+        }
+
         public PowerLauncherPage()
         {
             InitializeComponent();
             var settingsUtils = new SettingsUtils();
+            _lastIPCMessageSentTick = Environment.TickCount;
             PowerLauncherSettings settings = settingsUtils.GetSettingsOrDefault<PowerLauncherSettings>(PowerLauncherSettings.ModuleName);
-            ViewModel = new PowerLauncherViewModel(settings, SettingsRepository<GeneralSettings>.GetInstance(settingsUtils), ShellPage.SendDefaultIPCMessage, App.IsDarkTheme);
+            ViewModel = new PowerLauncherViewModel(settings, SettingsRepository<GeneralSettings>.GetInstance(settingsUtils), SendDefaultIPCMessageTimed, App.IsDarkTheme);
             DataContext = ViewModel;
             _ = Helper.GetFileWatcher(PowerLauncherSettings.ModuleName, "settings.json", () =>
             {
+                if (Environment.TickCount < _lastIPCMessageSentTick + 500)
+                {
+                    // Don't try to update data from the file if we tried to write to it through IPC in the last 500 milliseconds.
+                    return;
+                }
+
                 PowerLauncherSettings powerLauncherSettings = null;
                 try
                 {