mcs/class/System.Drawing/System.Drawing/ColorTranslator.cs

   1 //
   2 // System.Drawing.ColorTranslator.cs
   3 //
   4 // Copyright (C) 2001 Ximian, Inc.  http://www.ximian.com
   5 // Copyright (C) 2004 Novell, Inc.  http://www.novell.com
   6 //
   7 // Authors:
   8 //      Dennis Hayes (dennish@raytek.com)
   9 //      Ravindra (rkumar@novell.com)
  10 //
  11 //
  12
  13 //
  14 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  15 //
  16 // Permission is hereby granted, free of charge, to any person obtaining
  17 // a copy of this software and associated documentation files (the
  18 // "Software"), to deal in the Software without restriction, including
  19 // without limitation the rights to use, copy, modify, merge, publish,
  20 // distribute, sublicense, and/or sell copies of the Software, and to
  21 // permit persons to whom the Software is furnished to do so, subject to
  22 // the following conditions:
  23 //
  24 // The above copyright notice and this permission notice shall be
  25 // included in all copies or substantial portions of the Software.
  26 //
  27 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  28 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  29 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  30 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  31 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  32 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  33 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  34 //
  35
  36 using System;
  37 using System.ComponentModel;
  38
  39 namespace System.Drawing
  40 {
  41         public sealed class ColorTranslator
  42         {
  43                 private ColorTranslator () { }
  44
  45                 public static Color FromHtml (string HtmlFromColor)
  46                 {
  47                         TypeConverter converter = TypeDescriptor.GetConverter (typeof (Color));
  48                         return (Color) converter.ConvertFromString (HtmlFromColor);
  49                 }
  50
  51                 public static Color FromOle (int OleFromColor)
  52                 {
  53                         // OleColor format is BGR
  54                         int R = OleFromColor & 0xFF;
  55                         int G = (OleFromColor >> 8) & 0xFF;
  56                         int B = (OleFromColor >> 16) & 0xFF;
  57
  58                         Color retcolor = Color.FromArgb (255, R, G, B);
  59                         foreach (Color c in Color.NamedColors.Values) {
  60                                 if (c == retcolor)
  61                                         return c;
  62                         }
  63
  64                         foreach (Color c in Color.SystemColors.Values) {
  65                                 if (c == retcolor)
  66                                         return c;
  67                         }
  68
  69                         return retcolor;
  70                 }
  71
  72                 public static Color FromWin32 (int Win32FromColor)
  73                 {
  74                         // Win32Color format is BGR
  75                         int R = Win32FromColor & 0xFF;
  76                         int G = (Win32FromColor >> 8) & 0xFF;
  77                         int B = (Win32FromColor >> 16) & 0xFF;
  78
  79                         Color retcolor = Color.FromArgb (255, R, G, B);
  80                         foreach (Color c in Color.NamedColors.Values) {
  81                                 if (c == retcolor)
  82                                         return c;
  83                         }
  84
  85                         foreach (Color c in Color.SystemColors.Values) {
  86                                 if (c == retcolor)
  87                                         return c;
  88                         }
  89
  90                         return retcolor;
  91                 }
  92
  93                 public static string ToHtml (Color c)
  94                 {
  95                         if (c.IsEmpty)
  96                                 return "";
  97
  98                         string result;
  99
 100                         if (c.IsNamedColor)
 101                                 result = c.Name;
 102                         else
 103                                 result = String.Format ("#{0:X2}{1:X2}{2:X2}", c.R, c.G, c.B);
 104
 105                         return result;
 106                 }
 107
 108                 public static int ToOle (Color color)
 109                 {
 110                         // OleColor format is BGR, same as Win32
 111
 112                         return  ((color.B << 16) | (color.G << 8) | color.R);
 113                 }
 114
 115                 public static int ToWin32 (Color color)
 116                 {
 117                         // Win32Color format is BGR, Same as OleColor
 118
 119                         return  ((color.B << 16) | (color.G << 8) | color.R);
 120                 }
 121         }
 122 }