Include progress in error and warning states.

src/BenchmarkDotNet/Helpers/TaskbarProgress.cs

@@ -56,9 +56,7 @@ internal void SetProgress(float progressValue)
         }
 
         private void OnConsoleCancelEvent(object sender, ConsoleCancelEventArgs e)
-        {
-            Dispose();
-        }
+            => Dispose();
 
         public void Dispose()
         {
@@ -104,9 +102,7 @@ private interface ITaskbarList3
             [Guid("56FDF344-FD6D-11d0-958A-006097C9A090")]
             [ClassInterface(ClassInterfaceType.None)]
             [ComImport]
-            private class TaskbarInstance
-            {
-            }
+            private class TaskbarInstance { }
 
             [DllImport("kernel32.dll")]
             private static extern IntPtr GetConsoleWindow();
@@ -141,17 +137,13 @@ private Com(IntPtr handle)
             }
 
             internal void SetState(TaskbarProgressState taskbarState)
-            {
-                taskbarInstance.SetProgressState(consoleWindowHandle, taskbarState);
-            }
+                => taskbarInstance.SetProgressState(consoleWindowHandle, taskbarState);
 
             /// <summary>
             /// Sets the progress value out of 100.
             /// </summary>
             internal void SetValue(uint progressValue)
-            {
-                taskbarInstance.SetProgressValue(consoleWindowHandle, progressValue, 100);
-            }
+                => taskbarInstance.SetProgressValue(consoleWindowHandle, progressValue, 100);
         }
 
         private sealed class Terminal
@@ -185,11 +177,10 @@ private enum ConsoleModes : uint
             private const int STD_OUTPUT_HANDLE = -11;
 
             private readonly IntPtr consoleHandle;
+            private uint currentProgress;
 
             private Terminal(IntPtr handle)
-            {
-                consoleHandle = handle;
-            }
+                => consoleHandle = handle;
 
             internal static Terminal? MaybeCreateInstanceAndSetInitialState(TaskbarProgressState initialTaskbarState)
             {
@@ -206,52 +197,61 @@ private Terminal(IntPtr handle)
                     // If we try to write without VT mode, the sequence will be printed for the user to see, which clutters the output.
                     return null;
                 }
-                SetStateThenRevertConsoleMode(handle, initialTaskbarState, previousConsoleMode);
-                return new Terminal(handle);
+                var terminal = new Terminal(handle);
+                terminal.WriteStateSequence(initialTaskbarState);
+                SetConsoleMode(handle, previousConsoleMode);
+                return terminal;
             }
 
             internal void SetState(TaskbarProgressState taskbarState)
             {
                 GetConsoleMode(consoleHandle, out ConsoleModes previousConsoleMode);
                 SetConsoleMode(consoleHandle, ConsoleModes.ENABLE_VIRTUAL_TERMINAL_PROCESSING | ConsoleModes.ENABLE_PROCESSED_OUTPUT);
-                SetStateThenRevertConsoleMode(consoleHandle, taskbarState, previousConsoleMode);
+                WriteStateSequence(taskbarState);
+                SetConsoleMode(consoleHandle, previousConsoleMode);
             }
 
-            private static void SetStateThenRevertConsoleMode(IntPtr handle, TaskbarProgressState taskbarState, ConsoleModes previousConsoleMode)
+            private void WriteStateSequence(TaskbarProgressState taskbarState)
             {
                 // Write progress state to console for Windows Terminal (https://github.com/microsoft/terminal/issues/6700).
                 switch (taskbarState)
                 {
                     case TaskbarProgressState.NoProgress:
+                        currentProgress = 100;
                         Console.Write("\x1b]9;4;0;0\x1b\\");
                         break;
                     case TaskbarProgressState.Indeterminate:
+                        currentProgress = 100;
                         Console.Write("\x1b]9;4;3;0\x1b\\");
                         break;
                     case TaskbarProgressState.Normal:
-                        // Do nothing, this is set automatically when SetValue is called (and WT has no documented way to set this).
+                        // Normal state is set when progress is set.
+                        WriteProgressSequence(currentProgress);
                         break;
                     case TaskbarProgressState.Error:
-                        Console.Write("\x1b]9;4;2;0\x1b\\");
+                        Console.Write($"\x1b]9;4;2;{currentProgress}\x1b\\");
                         break;
                     case TaskbarProgressState.Warning:
-                        Console.Write("\x1b]9;4;4;0\x1b\\");
+                        Console.Write($"\x1b]9;4;4;{currentProgress}\x1b\\");
                         break;
                 }
-                SetConsoleMode(handle, previousConsoleMode);
             }
 
             /// <summary>
             /// Sets the progress value out of 100.
             /// </summary>
             internal void SetValue(uint progressValue)
             {
+                currentProgress = progressValue;
                 // Write progress sequence to console for Windows Terminal (https://github.com/microsoft/terminal/discussions/14268).
                 GetConsoleMode(consoleHandle, out ConsoleModes previousConsoleMode);
                 SetConsoleMode(consoleHandle, ConsoleModes.ENABLE_VIRTUAL_TERMINAL_PROCESSING | ConsoleModes.ENABLE_PROCESSED_OUTPUT);
-                Console.Write($"\x1b]9;4;1;{progressValue}\x1b\\");
+                WriteProgressSequence(progressValue);
                 SetConsoleMode(consoleHandle, previousConsoleMode);
             }
+
+            private static void WriteProgressSequence(uint progressValue)
+                => Console.Write($"\x1b]9;4;1;{progressValue}\x1b\\");
         }
     }
 }