Try to call tput to get console size if System.Console.BufferWidth/WindowHeight fails

src/Spectre.Console/Internal/ConsoleHelper.cs

@@ -2,39 +2,82 @@ namespace Spectre.Console;
 
 internal static class ConsoleHelper
 {
+    private static int InvokeTPut(string arg)
+    {
+        var startInfo = new ProcessStartInfo("tput", arg);
+        startInfo.RedirectStandardOutput = true;
+        startInfo.RedirectStandardError = true;
+        var process = Process.Start(startInfo);
+        if (process == null)
+        {
+            throw new Exception("Failed to start tput");
+        }
+
+        var output = new StringBuilder();
+        var error = new StringBuilder();
+        process.OutputDataReceived += (obj, data) => output.AppendLine(data.Data);
+        process.ErrorDataReceived += (obj, data) => error.AppendLine(data.Data);
+        process.Start();
+        process.BeginOutputReadLine();
+        process.BeginErrorReadLine();
+        process.WaitForExit();
+        if (process.ExitCode == 0)
+        {
+            return int.Parse(output.ToString());
+        }
+
+        throw new Exception(error.ToString());
+    }
+
     public static int GetSafeWidth(int defaultValue = Constants.DefaultTerminalWidth)
     {
+        var width = 0;
         try
         {
-            var width = System.Console.BufferWidth;
-            if (width == 0)
-            {
-                width = defaultValue;
-            }
-
-            return width;
+            width = System.Console.BufferWidth;
         }
         catch (IOException)
         {
-            return defaultValue;
         }
+
+        if (width == 0)
+        {
+            try
+            {
+                width = InvokeTPut("cols");
+            }
+            catch
+            {
+                width = defaultValue;
+            }
+        }
+
+        return width;
     }
 
     public static int GetSafeHeight(int defaultValue = Constants.DefaultTerminalHeight)
     {
+        var height = 0;
         try
         {
-            var height = System.Console.WindowHeight;
-            if (height == 0)
-            {
-                height = defaultValue;
-            }
-
-            return height;
+            height = System.Console.WindowHeight;
         }
         catch (IOException)
         {
-            return defaultValue;
         }
+
+        if (height == 0)
+        {
+            try
+            {
+                height = InvokeTPut("lines");
+            }
+            catch
+            {
+                height = defaultValue;
+            }
+        }
+
+        return height;
     }
 }