Add telemetry event for PowerRename settings (#1279)

* moved MAX_INPUT_STRING_LEN constant
* added settings changed event log

src/modules/powerrename/lib/Settings.h

@@ -3,6 +3,8 @@
 class CSettings
 {
 public:
+    static const int MAX_INPUT_STRING_LEN = 1024;
+
     static bool GetEnabled();
     static bool SetEnabled(_In_ bool enabled);
 

src/modules/powerrename/lib/trace.cpp

@@ -1,5 +1,6 @@
 #include "stdafx.h"
 #include "trace.h"
+#include "Settings.h"
 
 TRACELOGGING_DEFINE_PROVIDER(
       g_hProvider,
@@ -71,3 +72,18 @@ void Trace::RenameOperation(_In_ UINT totalItemCount, _In_ UINT selectedItemCoun
         TraceLoggingWideString(extensionList, "ExtensionList"));
 }
 
+void Trace::SettingsChanged() noexcept
+{
+    TraceLoggingWrite(
+        g_hProvider,
+        "PowerRename_SettingsChanged",
+        ProjectTelemetryPrivacyDataTag(ProjectTelemetryTag_ProductAndServicePerformance),
+        TraceLoggingKeyword(PROJECT_KEYWORD_MEASURE),
+        TraceLoggingBoolean(CSettings::GetEnabled(), "IsEnabled"),
+        TraceLoggingBoolean(CSettings::GetShowIconOnMenu(), "ShowIconOnMenu"),
+        TraceLoggingBoolean(CSettings::GetExtendedContextMenuOnly(), "ExtendedContextMenuOnly"),
+        TraceLoggingBoolean(CSettings::GetPersistState(), "PersistState"),
+        TraceLoggingBoolean(CSettings::GetMRUEnabled(), "IsMRUEnabled"),
+        TraceLoggingUInt64(CSettings::GetMaxMRUSize(), "MaxMRUSize"),
+        TraceLoggingUInt64(CSettings::GetFlags(), "Flags"));
+}

src/modules/powerrename/lib/trace.h

@@ -14,4 +14,5 @@ public:
       _In_ UINT renameItemCount,
       _In_ DWORD flags,
       _In_ PCWSTR extensionList) noexcept;
+  static void SettingsChanged() noexcept;
 };