Coloured write now uses WinTermEmulation on Windows.

Basic state machine for parsing ANSI VT100 subset.

source/colorize/cwrite.d

@@ -25,7 +25,7 @@ void cwritef(T...)(T args)
 /// Coloured writefln.
 void cwritefln(T...)(T args)
 {
-    stdout.cwritefln(args);
+    stdout.cwritef(args, "\n");
 }
 
 /// Coloured writeln.
@@ -39,7 +39,7 @@ void cwriteln(T...)(T args)
 void cwritef(File f, Char, A...)(in Char[] fmt, A args)
 {
     auto s = format(fmt, args);
-    f.write(s); // TODO support colours
+    f.cwrite(s);
 }
 
 /// Coloured writef to a File.
@@ -51,6 +51,15 @@ void cwrite(S...)(File f, S args)
     foreach(arg; args)
         s ~= to!string(arg);
 
-    f.write(s);
+    version(Windows)
+    {
+        auto winterm = WinTermEmulation();
+        foreach(c ; s)
+            winterm.feed(c);
+    }
+    else
+    {
+        f.write(s);
+    }
 }
 

source/colorize/winterm.d

@@ -17,17 +17,18 @@ version(Windows)
     struct WinTermEmulation
     {
     public:
-        this(bool workardound = true) nothrow
+        this(bool workardound = true) nothrow @nogc
         {
-            _console = GetStdHandle(STD_OUTPUT_HANDLE);
-
             // saves console attributes
+            _console = GetStdHandle(STD_OUTPUT_HANDLE);
             _savedInitialColor = (0 != GetConsoleScreenBufferInfo(_console, &consoleInfo));
 
+            _state = State.initial;
         }
 
-        ~this()
+        ~this() nothrow @nogc
         {
+            // Restore initial text attributes on release
             if (_savedInitialColor)
             {
                 SetConsoleTextAttribute(_console, consoleInfo.wAttributes);
@@ -35,15 +36,110 @@ version(Windows)
             }
         }
 
-        void feed(dchar d) nothrow
+        // Eat one character and update color state accordingly. Return true if this character should be displayed.
+        bool feed(dchar d) nothrow @nogc
         {
+            final switch(_state) with (State)
+            {
+                case initial:
+                    if (d == '\x1B')
+                    {
+                        _state = escaped;
+                        return false;
+                    }
+                    break;
 
+                case escaped:
+                    if (d == '[')
+                    {
+                        _state = readingAttribute;
+                        _currentAttr = 0;
+                        return false;
+                    }
+                    break;
+
+
+                case readingAttribute:
+                    if (d >= '0' && d <= '9')
+                    {
+                        _parsedAttr = _parsedAttr * 10 + (_parsedAttr - '0');
+                        return false;
+                    }
+                    else if (d == ';')
+                    {
+                        executeAttribute(_parsedAttr);
+                        return false;
+                    }
+                    else if (d == 'm')
+                    {
+                        _state = State.initial;
+                        return false;
+                    }
+                    break;
+            }
+            return true;
         }
 
     private:
         HANDLE _console;
         bool _savedInitialColor;
         CONSOLE_SCREEN_BUFFER_INFO consoleInfo;
+        State _state;
+        WORD _currentAttr;
+        int _parsedAttr;
+
+        enum State
+        {
+            initial,
+            escaped,
+            readingAttribute
+        }           
+
+        void executeAttribute(int attr) nothrow @nogc
+        {
+            switch (attr)
+            {
+          /+      case 0:
+                    if (_savedInitialColor)
+                        SetConsoleTextAttribute(_console, consoleInfo.wAttributes);
+                    break;
+
+                default:
+
+                    if (30 <= attr && attr <= 37)
+            }
+
+            0	Reset all attributes
+                1	Bright
+                2	Dim
+                4	Underscore	
+                5	Blink
+                7	Reverse
+                8	Hidden
+
+                Foreground Colours
+                30	Black
+                31	Red
+                32	Green
+                33	Yellow
+                34	Blue
+                35	Magenta
+                36	Cyan
+                37	White
+
+                Background Colours
+                40	Black
+                41	Red
+                42	Green
+                43	Yellow
+                44	Blue
+                45	Magenta
+                46	Cyan
+                47	White
++/
+                default:
+            }
+        }
     }
 }