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  1. import std.conv;
  2. import std.stdio;
  3.  
  4. public struct Color
  5. {
  6. 	private enum Mode: bool
  7. 	{
  8. 		BASIC,
  9. 		EXTENDED
  10. 	}
  11.  
  12. 	private ubyte Data;
  13. 	private Mode DataMode;
  14.  
  15. 	public this(const double Red, const double Green, const double Blue)
  16. 	{
  17. 		// Pack RGB values into 8 bits for xterm-256color.
  18. 		Data += cast(ubyte)(Red * 5) * 36;
  19. 		Data += cast(ubyte)(Green * 5) * 6;
  20. 		Data += cast(ubyte)(Blue * 5);
  21.  
  22. 		Data += 16; // The first 16 values are for system colors.
  23.  
  24. 		DataMode = Mode.EXTENDED;
  25. 	}
  26.  
  27. 	// Module-protected.  Allows for special basic color support.
  28. 	this(const ubyte Index)
  29. 	{
  30. 		Data = Index;
  31. 		DataMode = Mode.BASIC;
  32. 	}
  33.  
  34. 		/**
  35. 		 * Returns an ANSI escape code to make any following text
  36. 		 * the color represented by this object.
  37. 		 **/
  38. 	@property string TextColorCode() const
  39. 	{
  40. 		// "ESC" would be replaced with the actual escape character.
  41. 		// "ESC" is used here to more easily see what's going on.
  42.  
  43. 		if (DataMode == Mode.BASIC)
  44. 		{
  45. 			return "ESC[" ~ to!string(30 + Data) ~ "m";
  46. 		}
  47.  
  48. 		else
  49. 		{
  50. 			return "ESC[38;5;" ~ to!string(Data) ~ "m";
  51. 		}
  52. 	}
  53. }
  54.  
  55. public
  56. {
  57. 	immutable Color BLACK = Color(cast(ubyte)0);
  58. 	immutable Color RED = Color(cast(ubyte)1);
  59. 	immutable Color GREEN = Color(cast(ubyte)2);
  60. 	immutable Color YELLOW = Color(cast(ubyte)3);
  61. 	immutable Color BLUE = Color(cast(ubyte)4);
  62. 	immutable Color MAGENTA = Color(cast(ubyte)5);
  63. 	immutable Color CYAN = Color(cast(ubyte)6);
  64. 	immutable Color WHITE = Color(cast(ubyte)7);
  65.  
  66. 	immutable Color DEFAULT = Color(cast(ubyte)9);
  67. }
  68.  
  69. public void Output(const string Text, const Color TextColor = DEFAULT)
  70. {
  71. 	write(TextColor.TextColorCode);
  72. 	write(Text);
  73. 	write("ESC[0m");
  74. }
  75.  
  76. void main()
  77. {
  78. 	Output("Hello, ");
  79. 	Output("world!\n", BLUE);
  80. 	Output("XTerm 256-color is supported.\n", Color(1.0, 1.0, 0.0));
  81. }
Success #stdin #stdout 0.01s 2068KB
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stdin
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Standard input is empty
stdout
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ESC[39mHello, ESC[0mESC[34mworld!
ESC[0mESC[38;5;226mXTerm 256-color is supported.
ESC[0m
https://ideone.com/YCS7l
language:
D (dmd 2.085.0)
created:
11 years ago
visibility:
public

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