Sicherung

Kalk/Consolus/ConsoleHelper.cs

@@ -0,0 +1,49 @@
+using System;
+using System.Diagnostics;
+using System.Runtime.InteropServices;
+
+namespace Consolus
+{
+    public class ConsoleHelper
+    {
+        public static readonly bool IsWindows = RuntimeInformation.IsOSPlatform(OSPlatform.Windows);
+
+        private static readonly Lazy<bool> _isConsoleSupportingEscapeSequences = new Lazy<bool>(IsConsoleSupportingEscapeSequencesInternal);
+        private static readonly Lazy<bool> _hasInteractiveConsole = new Lazy<bool>(HasInteractiveConsoleInternal);
+        
+        [DebuggerBrowsable(DebuggerBrowsableState.Never)]
+        public static bool SupportEscapeSequences => _isConsoleSupportingEscapeSequences.Value;
+
+        [DebuggerBrowsable(DebuggerBrowsableState.Never)]
+        public static bool HasInteractiveConsole => _hasInteractiveConsole.Value;
+
+        private static bool IsConsoleSupportingEscapeSequencesInternal()
+        {
+            if (Console.IsOutputRedirected || Console.IsErrorRedirected || !HasInteractiveConsole)
+            {
+                return false;
+            }
+
+            if (IsWindows)
+            {
+                WindowsHelper.EnableAnsiEscapeOnWindows();
+            }
+
+            var left = Console.CursorLeft;
+            var top = Console.CursorTop;
+            ConsoleStyle.Reset.Render(Console.Out);
+            bool support = true;
+            if (left != Console.CursorLeft || top != Console.CursorTop)
+            {
+                support = false;
+                // Remove previous sequence
+                Console.SetCursorPosition(left, top);
+                Console.Write("    "); // Clear \x1b[0m = 4 characters
+                Console.SetCursorPosition(left, top);
+            }
+            return support;
+        }
+
+        private static bool HasInteractiveConsoleInternal() => IsWindows ? WindowsHelper.HasConsoleWindows() : Environment.UserInteractive;
+    }
+}