Remove tty check from table component

src/Table.cpp

@@ -100,13 +100,7 @@ void Table::set (int row, int col, const Color color)
 std::string Table::render ()
 {
   // Piped output disables color, unless overridden.
-  if (! _forceColor &&
-#ifdef _WIN32
-      ! _isatty(_fileno(stdout))
-#else
-      ! isatty (STDOUT_FILENO)
-#endif
-      )
+  if (! _with_color)
   {
     _header     = Color ("");
     _odd        = Color ("");

src/Table.h

@@ -1,6 +1,6 @@
 ////////////////////////////////////////////////////////////////////////////////
 //
-// Copyright 2016 - 2017, 2019 - 2021, 2023, Gothenburg Bit Factory.
+// Copyright 2016 - 2017, 2019 - 2021, 2023, 2025 Gothenburg Bit Factory.
 //
 // Permission is hereby granted, free of charge, to any person obtaining a copy
 // of this software and associated documentation files (the "Software"), to deal
@@ -52,6 +52,7 @@ class Table
   void forceColor ()                   { _forceColor = true;         }
   void obfuscate ()                    { _obfuscate = true;          }
   void underlineHeaders ()             { _underline_headers = true;  }
+  void withColor (bool with_color)     { _with_color = with_color;   }
   int lines ()                         { return _lines;              }
   int rows ()                          { return (int) _data.size (); }
 
@@ -90,7 +91,8 @@ class Table
   Color                                   _extra_even        {0};
   int                                     _truncate_lines    {0};
   int                                     _truncate_rows     {0};
-  bool                                    _forceColor        {false};
+  bool                                    _forceColor        {false}; // TODO: remove once TW and TI have switched
+  bool                                    _with_color        {true};
   bool                                    _obfuscate         {false};
   bool                                    _underline_headers {false};
   int                                     _lines             {0};

test/table.t.cpp

@@ -31,7 +31,7 @@
 ////////////////////////////////////////////////////////////////////////////////
 int main (int, char**)
 {
-  UnitTest t (1);
+  UnitTest t (3);
 
   try
   {
@@ -75,6 +75,25 @@ int main (int, char**)
 
     std::cout << t1.render ();
     t.ok (t1.lines () > 4, "Table::lines > 4");
+
+    // Test color behavior - with color enabled (default)
+    Table t3;
+    t3.width (80);
+    t3.add ("Header", true);
+    row = t3.addRow ();
+    t3.set (row, 0, "cell with color", single_cell);
+    std::string colored_output = t3.render ();
+    t.ok (colored_output.find("\033[") != std::string::npos, "Colored output contains ANSI escape codes");
+
+    // Test color behavior - with color disabled
+    Table t4;
+    t4.width (80);
+    t4.withColor (false);  // Disable color
+    t4.add ("Header", true);
+    row = t4.addRow ();
+    t4.set (row, 0, "cell without color", single_cell);
+    std::string uncolored_output = t4.render ();
+    t.ok (uncolored_output.find("\033[") == std::string::npos, "Uncolored output does not contain ANSI escape codes");
 
     // Chessboard example
     Table t2;