private static void InitializeHtmlSysColorTable()
{
htmlSysColorTable = new Hashtable(26);
htmlSysColorTable["activeborder"] = ColorExt.FromKnownColor(KnownColor.ActiveBorder);
htmlSysColorTable["activecaption"] = ColorExt.FromKnownColor(KnownColor.ActiveCaption);
htmlSysColorTable["appworkspace"] = ColorExt.FromKnownColor(KnownColor.AppWorkspace);
htmlSysColorTable["background"] = ColorExt.FromKnownColor(KnownColor.Desktop);
htmlSysColorTable["buttonface"] = ColorExt.FromKnownColor(KnownColor.Control);
htmlSysColorTable["buttonhighlight"] = ColorExt.FromKnownColor(KnownColor.ControlLightLight);
htmlSysColorTable["buttonshadow"] = ColorExt.FromKnownColor(KnownColor.ControlDark);
htmlSysColorTable["buttontext"] = ColorExt.FromKnownColor(KnownColor.ControlText);
htmlSysColorTable["captiontext"] = ColorExt.FromKnownColor(KnownColor.ActiveCaptionText);
htmlSysColorTable["graytext"] = ColorExt.FromKnownColor(KnownColor.GrayText);
htmlSysColorTable["highlight"] = ColorExt.FromKnownColor(KnownColor.Highlight);
htmlSysColorTable["highlighttext"] = ColorExt.FromKnownColor(KnownColor.HighlightText);
htmlSysColorTable["inactiveborder"] = ColorExt.FromKnownColor(KnownColor.InactiveBorder);
htmlSysColorTable["inactivecaption"] = ColorExt.FromKnownColor(KnownColor.InactiveCaption);
htmlSysColorTable["inactivecaptiontext"] = ColorExt.FromKnownColor(KnownColor.InactiveCaptionText);
htmlSysColorTable["infobackground"] = ColorExt.FromKnownColor(KnownColor.Info);
htmlSysColorTable["infotext"] = ColorExt.FromKnownColor(KnownColor.InfoText);
htmlSysColorTable["menu"] = ColorExt.FromKnownColor(KnownColor.Menu);
htmlSysColorTable["menutext"] = ColorExt.FromKnownColor(KnownColor.MenuText);
htmlSysColorTable["scrollbar"] = ColorExt.FromKnownColor(KnownColor.ScrollBar);
htmlSysColorTable["threeddarkshadow"] = ColorExt.FromKnownColor(KnownColor.ControlDarkDark);
htmlSysColorTable["threedface"] = ColorExt.FromKnownColor(KnownColor.Control);
htmlSysColorTable["threedhighlight"] = ColorExt.FromKnownColor(KnownColor.ControlLight);
htmlSysColorTable["threedlightshadow"] = ColorExt.FromKnownColor(KnownColor.ControlLightLight);
htmlSysColorTable["window"] = ColorExt.FromKnownColor(KnownColor.Window);
htmlSysColorTable["windowframe"] = ColorExt.FromKnownColor(KnownColor.WindowFrame);
htmlSysColorTable["windowtext"] = ColorExt.FromKnownColor(KnownColor.WindowText);
}
/// <include file='doc\ColorConverter.uex' path='docs/doc[@for="ColorConverter.ConvertTo"]/*' />
/// <devdoc>
/// Converts the given object to another type. The most common types to convert
/// are to and from a string object. The default implementation will make a call
/// to ToString on the object if the object is valid and if the destination
/// type is string. If this cannot convert to the desitnation type, this will
/// throw a NotSupportedException.
/// </devdoc>
public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
{
if (destinationType == null)
{
throw new ArgumentNullException("destinationType");
}
if (value is Color)
{
if (destinationType == typeof(string))
{
Color c = (Color)value;
if (c == Color.Empty)
{
return(string.Empty);
}
else
{
// If this is a known color, then Color can provide its own
// name. Otherwise, we fabricate an ARGB value for it.
//
if (ColorExt.IsKnownColor(c))
{
return(c.Name);
}
else if (c.IsNamedColor)
{
return("'" + c.Name + "'");
}
else
{
if (culture == null)
{
culture = CultureInfo.CurrentCulture;
}
string sep = culture.TextInfo.ListSeparator + " ";
TypeConverter intConverter = TypeDescriptor.GetConverter(typeof(int));
string[] args;
int nArg = 0;
if (c.A < 255)
{
args = new string[4];
args[nArg++] = intConverter.ConvertToString(context, culture, (object)c.A);
}
else
{
args = new string[3];
}
// Note: ConvertToString will raise exception if value cannot be converted.
args[nArg++] = intConverter.ConvertToString(context, culture, (object)c.R);
args[nArg++] = intConverter.ConvertToString(context, culture, (object)c.G);
args[nArg++] = intConverter.ConvertToString(context, culture, (object)c.B);
// Now slam all of these together with the fantastic Join
// method.
//
return(string.Join(sep, args));
}
}
}
if (destinationType == typeof(InstanceDescriptor))
{
MemberInfo member = null;
object[] args = null;
Color c = (Color)value;
if (c.IsEmpty)
{
member = typeof(Color).GetField("Empty");
}
else if (ColorExt.IsSystemColor(c))
{
member = typeof(SystemColors).GetProperty(c.Name);
}
else if (ColorExt.IsKnownColor(c))
{
member = typeof(Color).GetProperty(c.Name);
}
else if (c.A != 255)
{
member = typeof(Color).GetMethod("FromArgb", new Type[] { typeof(int), typeof(int), typeof(int), typeof(int) });
args = new object[] { c.A, c.R, c.G, c.B };
}
else if (c.IsNamedColor)
{
member = typeof(Color).GetMethod("FromName", new Type[] { typeof(string) });
args = new object[] { c.Name };
}
else
{
member = typeof(Color).GetMethod("FromArgb", new Type[] { typeof(int), typeof(int), typeof(int) });
args = new object[] { c.R, c.G, c.B };
}
//Debug.Assert(member != null, "Could not convert color to member. Did someone change method name / signature and not update Colorconverter?");
if (member != null)
{
return(new InstanceDescriptor(member, args));
}
else
{
return(null);
}
}
}
return(base.ConvertTo(context, culture, value, destinationType));
}
public static string ToHtml(Color c)
{
string colorString = String.Empty;
if (c.IsEmpty)
{
return(colorString);
}
bool flag = true;
if (ColorExt.IsKnownColor(c))
{
flag = false;
switch (ColorExt.ToKnownColor(c))
{
case KnownColor.ActiveBorder: colorString = "activeborder"; break;
case KnownColor.GradientActiveCaption:
case KnownColor.ActiveCaption: colorString = "activecaption"; break;
case KnownColor.AppWorkspace: colorString = "appworkspace"; break;
case KnownColor.Desktop: colorString = "background"; break;
case KnownColor.Control: colorString = "buttonface"; break;
case KnownColor.ControlLight: colorString = "buttonface"; break;
case KnownColor.ControlDark: colorString = "buttonshadow"; break;
case KnownColor.ControlText: colorString = "buttontext"; break;
case KnownColor.ActiveCaptionText: colorString = "captiontext"; break;
case KnownColor.GrayText: colorString = "graytext"; break;
case KnownColor.HotTrack:
case KnownColor.Highlight: colorString = "highlight"; break;
case KnownColor.MenuHighlight:
case KnownColor.HighlightText: colorString = "highlighttext"; break;
case KnownColor.InactiveBorder: colorString = "inactiveborder"; break;
case KnownColor.GradientInactiveCaption:
case KnownColor.InactiveCaption: colorString = "inactivecaption"; break;
case KnownColor.InactiveCaptionText: colorString = "inactivecaptiontext"; break;
case KnownColor.Info: colorString = "infobackground"; break;
case KnownColor.InfoText: colorString = "infotext"; break;
case KnownColor.MenuBar:
case KnownColor.Menu: colorString = "menu"; break;
case KnownColor.MenuText: colorString = "menutext"; break;
case KnownColor.ScrollBar: colorString = "scrollbar"; break;
case KnownColor.ControlDarkDark: colorString = "threeddarkshadow"; break;
case KnownColor.ControlLightLight: colorString = "buttonhighlight"; break;
case KnownColor.Window: colorString = "window"; break;
case KnownColor.WindowFrame: colorString = "windowframe"; break;
case KnownColor.WindowText: colorString = "windowtext"; break;
default: flag = true; break;
}
}
if (flag)
{
if (c.IsNamedColor)
{
if (c == Color.LightGray)
{
// special case due to mismatch between Html and enum spelling
colorString = "LightGrey";
}
else
{
colorString = c.Name;
}
}
else
{
colorString = "#" + c.R.ToString("X2", null) +
c.G.ToString("X2", null) +
c.B.ToString("X2", null);
}
}
return(colorString);
}
