[Telemetry]Re-add preview handlers telemetry logs and add tracers (#35597)

src/modules/previewpane/MarkdownPreviewHandler/MarkdownPreviewHandlerControl.cs

@@ -9,6 +9,8 @@ using System.Text.RegularExpressions;
 
 using Common;
 using Microsoft.PowerToys.PreviewHandler.Markdown.Properties;
+using Microsoft.PowerToys.PreviewHandler.Markdown.Telemetry.Events;
+using Microsoft.PowerToys.Telemetry;
 using Microsoft.Web.WebView2.Core;
 using Microsoft.Web.WebView2.WinForms;
 using Windows.System;
@@ -215,9 +217,25 @@ namespace Microsoft.PowerToys.PreviewHandler.Markdown
                     {
                     }
                 });
+
+                try
+                {
+                    PowerToysTelemetry.Log.WriteEvent(new MarkdownFilePreviewed());
+                }
+                catch
+                { // Should not crash if sending telemetry is failing. Ignore the exception.
+                }
             }
-            catch (Exception)
+            catch (Exception ex)
             {
+                try
+                {
+                    PowerToysTelemetry.Log.WriteEvent(new MarkdownFilePreviewError { Message = ex.Message });
+                }
+                catch
+                { // Should not crash if sending telemetry is failing. Ignore the exception.
+                }
+
                 Controls.Clear();
                 _infoBarDisplayed = true;
                 _infoBar = GetTextBoxControl(Resources.MarkdownNotPreviewedError);

src/modules/previewpane/MarkdownPreviewHandler/Program.cs

@@ -6,6 +6,7 @@ using System.Globalization;
 using System.Windows.Threading;
 
 using Common.UI;
+using Microsoft.PowerToys.Telemetry;
 using PowerToys.Interop;
 
 namespace Microsoft.PowerToys.PreviewHandler.Markdown
@@ -27,6 +28,8 @@ namespace Microsoft.PowerToys.PreviewHandler.Markdown
             {
                 if (args.Length == 6)
                 {
+                    ETWTrace etwTrace = new ETWTrace(Path.Combine(Environment.GetEnvironmentVariable("USERPROFILE"), "AppData", "LocalLow", "Microsoft", "PowerToys", "etw"));
+
                     string filePath = args[0];
                     IntPtr hwnd = IntPtr.Parse(args[1], NumberStyles.HexNumber, CultureInfo.InvariantCulture);
 
@@ -52,12 +55,16 @@ namespace Microsoft.PowerToys.PreviewHandler.Markdown
                             Rectangle s = default;
                             if (!_previewHandlerControl.SetRect(s))
                             {
+                                etwTrace?.Dispose();
+
                                 // When the parent HWND became invalid, the application won't respond to Application.Exit().
                                 Environment.Exit(0);
                             }
                         },
                         Dispatcher.CurrentDispatcher,
                         _tokenSource.Token);
+
+                    etwTrace?.Dispose();
                 }
                 else
                 {

src/modules/previewpane/MarkdownPreviewHandler/Telemetry/Events/MarkdownFileHandlerLoaded.cs

@@ -0,0 +1,21 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System.Diagnostics.Tracing;
+
+using Microsoft.PowerToys.Telemetry;
+using Microsoft.PowerToys.Telemetry.Events;
+
+namespace Microsoft.PowerToys.PreviewHandler.Markdown.Telemetry.Events
+{
+    /// <summary>
+    /// A telemetry event that is triggered when a markdown file is viewed in the preview pane.
+    /// </summary>
+    [EventData]
+    public class MarkdownFileHandlerLoaded : EventBase, IEvent
+    {
+        /// <inheritdoc/>
+        public PartA_PrivTags PartA_PrivTags => PartA_PrivTags.ProductAndServiceUsage;
+    }
+}

src/modules/previewpane/MarkdownPreviewHandler/Telemetry/Events/MarkdownFilePreviewError.cs

@@ -0,0 +1,23 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using Microsoft.PowerToys.Telemetry;
+using Microsoft.PowerToys.Telemetry.Events;
+
+namespace Microsoft.PowerToys.PreviewHandler.Markdown.Telemetry.Events
+{
+    /// <summary>
+    /// A telemetry event that is triggered when an error occurs while attempting to view a markdown file in the preview pane.
+    /// </summary>
+    public class MarkdownFilePreviewError : EventBase, IEvent
+    {
+        /// <summary>
+        /// Gets or sets the error message.
+        /// </summary>
+        public string Message { get; set; }
+
+        /// <inheritdoc/>
+        public PartA_PrivTags PartA_PrivTags => PartA_PrivTags.ProductAndServicePerformance;
+    }
+}

src/modules/previewpane/MarkdownPreviewHandler/Telemetry/Events/MarkdownFilePreviewed.cs

@@ -0,0 +1,21 @@
+// Copyright (c) Microsoft Corporation
+// The Microsoft Corporation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System.Diagnostics.Tracing;
+
+using Microsoft.PowerToys.Telemetry;
+using Microsoft.PowerToys.Telemetry.Events;
+
+namespace Microsoft.PowerToys.PreviewHandler.Markdown.Telemetry.Events
+{
+    /// <summary>
+    /// A telemetry event that is triggered when a markdown file is viewed in the preview pane.
+    /// </summary>
+    [EventData]
+    public class MarkdownFilePreviewed : EventBase, IEvent
+    {
+        /// <inheritdoc/>
+        public PartA_PrivTags PartA_PrivTags => PartA_PrivTags.ProductAndServiceUsage;
+    }
+}