Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / CommonUI / System / Drawing / Advanced / ColorTranslator.cs / 1 / ColorTranslator.cs
//------------------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
//-----------------------------------------------------------------------------
namespace System.Drawing {
using System.Runtime.Serialization.Formatters;
using System.Runtime.InteropServices;
using System.Diagnostics;
using System.Collections;
using System.ComponentModel;
using System.Drawing;
using System.Globalization;
///
/// Translates colors to and from GDI+
public sealed class ColorTranslator {
private const int Win32RedShift = 0;
private const int Win32GreenShift = 8;
private const int Win32BlueShift = 16;
private static Hashtable htmlSysColorTable;
// not creatable...
//
private ColorTranslator() {
}
///
/// Translates the specified
public static int ToWin32(Color c) {
return c.R << Win32RedShift | c.G << Win32GreenShift | c.B << Win32BlueShift;
}
///
/// Translates the specified
public static int ToOle(Color c) {
// WARNING!!! WARNING!!! WARNING!!! WARNING!!!
// WARNING!!! WARNING!!! WARNING!!! WARNING!!!
// We must never have another method called ToOle() with a different signature.
// This is so that we can push into the runtime a custom marshaller for OLE_COLOR to Color.
if (c.IsKnownColor) {
switch (c.ToKnownColor()) {
case KnownColor.ActiveBorder:
return unchecked((int)0x8000000A);
case KnownColor.ActiveCaption:
return unchecked((int)0x80000002);
case KnownColor.ActiveCaptionText:
return unchecked((int)0x80000009);
case KnownColor.AppWorkspace:
return unchecked((int)0x8000000C);
case KnownColor.ButtonFace:
return unchecked((int)0x8000000F);
case KnownColor.ButtonHighlight:
return unchecked((int)0x80000014);
case KnownColor.ButtonShadow:
return unchecked((int)0x80000010);
case KnownColor.Control:
return unchecked((int)0x8000000F);
case KnownColor.ControlDark:
return unchecked((int)0x80000010);
case KnownColor.ControlDarkDark:
return unchecked((int)0x80000015);
case KnownColor.ControlLight:
return unchecked((int)0x80000016);
case KnownColor.ControlLightLight:
return unchecked((int)0x80000014);
case KnownColor.ControlText:
return unchecked((int)0x80000012);
case KnownColor.Desktop:
return unchecked((int)0x80000001);
case KnownColor.GradientActiveCaption:
return unchecked((int)0x8000001B);
case KnownColor.GradientInactiveCaption:
return unchecked((int)0x8000001C);
case KnownColor.GrayText:
return unchecked((int)0x80000011);
case KnownColor.Highlight:
return unchecked((int)0x8000000D);
case KnownColor.HighlightText:
return unchecked((int)0x8000000E);
case KnownColor.HotTrack:
return unchecked((int)0x8000000D);
case KnownColor.InactiveBorder:
return unchecked((int)0x8000000B);
case KnownColor.InactiveCaption:
return unchecked((int)0x80000003);
case KnownColor.InactiveCaptionText:
return unchecked((int)0x80000013);
case KnownColor.Info:
return unchecked((int)0x80000018);
case KnownColor.InfoText:
return unchecked((int)0x80000017);
case KnownColor.Menu:
return unchecked((int)0x80000004);
case KnownColor.MenuBar:
return unchecked((int)0x8000001E);
case KnownColor.MenuHighlight:
return unchecked((int)0x8000001D);
case KnownColor.MenuText:
return unchecked((int)0x80000007);
case KnownColor.ScrollBar:
return unchecked((int)0x80000000);
case KnownColor.Window:
return unchecked((int)0x80000005);
case KnownColor.WindowFrame:
return unchecked((int)0x80000006);
case KnownColor.WindowText:
return unchecked((int)0x80000008);
}
}
return ToWin32(c);
}
///
/// Translates an Ole color value to a GDI+
///
public static Color FromOle(int oleColor) {
// WARNING!!! WARNING!!! WARNING!!! WARNING!!!
// WARNING!!! WARNING!!! WARNING!!! WARNING!!!
// We must never have another method called ToOle() with a different signature.
// This is so that we can push into the runtime a custom marshaller for OLE_COLOR to Color.
// if system color
// (the if < 0x18 check test whether it's a well-formed system color)
if ((int)(oleColor & 0xFF000000) == unchecked((int)0x80000000)
&& (oleColor & 0xFFFFFF) <= 0x18) {
switch (oleColor) {
case unchecked((int)0x8000000A):
return Color.FromKnownColor(KnownColor.ActiveBorder);
case unchecked((int)0x80000002):
return Color.FromKnownColor(KnownColor.ActiveCaption);
case unchecked((int)0x80000009):
return Color.FromKnownColor(KnownColor.ActiveCaptionText);
case unchecked((int)0x8000000C):
return Color.FromKnownColor(KnownColor.AppWorkspace);
case unchecked((int)0x8000000F):
return Color.FromKnownColor(KnownColor.Control);
case unchecked((int)0x80000010):
return Color.FromKnownColor(KnownColor.ControlDark);
case unchecked((int)0x80000015):
return Color.FromKnownColor(KnownColor.ControlDarkDark);
case unchecked((int)0x80000016):
return Color.FromKnownColor(KnownColor.ControlLight);
case unchecked((int)0x80000014):
return Color.FromKnownColor(KnownColor.ControlLightLight);
case unchecked((int)0x80000012):
return Color.FromKnownColor(KnownColor.ControlText);
case unchecked((int)0x80000001):
return Color.FromKnownColor(KnownColor.Desktop);
case unchecked((int)0x8000001B):
return Color.FromKnownColor(KnownColor.GradientActiveCaption);
case unchecked((int)0x8000001C):
return Color.FromKnownColor(KnownColor.GradientInactiveCaption);
case unchecked((int)0x80000011):
return Color.FromKnownColor(KnownColor.GrayText);
case unchecked((int)0x8000000D):
return Color.FromKnownColor(KnownColor.Highlight);
case unchecked((int)0x8000000E):
return Color.FromKnownColor(KnownColor.HighlightText);
case unchecked((int)0x8000000B):
return Color.FromKnownColor(KnownColor.InactiveBorder);
case unchecked((int)0x80000003):
return Color.FromKnownColor(KnownColor.InactiveCaption);
case unchecked((int)0x80000013):
return Color.FromKnownColor(KnownColor.InactiveCaptionText);
case unchecked((int)0x80000018):
return Color.FromKnownColor(KnownColor.Info);
case unchecked((int)0x80000017):
return Color.FromKnownColor(KnownColor.InfoText);
case unchecked((int)0x80000004):
return Color.FromKnownColor(KnownColor.Menu);
case unchecked((int)0x8000001E):
return Color.FromKnownColor(KnownColor.MenuBar);
case unchecked((int)0x8000001D):
return Color.FromKnownColor(KnownColor.MenuHighlight);
case unchecked((int)0x80000007):
return Color.FromKnownColor(KnownColor.MenuText);
case unchecked((int)0x80000000):
return Color.FromKnownColor(KnownColor.ScrollBar);
case unchecked((int)0x80000005):
return Color.FromKnownColor(KnownColor.Window);
case unchecked((int)0x80000006):
return Color.FromKnownColor(KnownColor.WindowFrame);
case unchecked((int)0x80000008):
return Color.FromKnownColor(KnownColor.WindowText);
}
}
Color color = Color.FromArgb((byte)((oleColor >> Win32RedShift) & 0xFF),
(byte)((oleColor >> Win32GreenShift) & 0xFF),
(byte)((oleColor >> Win32BlueShift) & 0xFF));
return KnownColorTable.ArgbToKnownColor(color.ToArgb());
}
///
/// Translates an Win32 color value to a
/// GDI+
public static Color FromWin32(int win32Color) {
return FromOle(win32Color);
}
///
/// Translates an Html color representation to
/// a GDI+
public static Color FromHtml(string htmlColor) {
Color c = Color.Empty;
// empty color
if ((htmlColor == null) || (htmlColor.Length == 0))
return c;
// #RRGGBB or #RGB
if ((htmlColor[0] == '#') &&
((htmlColor.Length == 7) || (htmlColor.Length == 4))) {
if (htmlColor.Length == 7) {
c = Color.FromArgb(Convert.ToInt32(htmlColor.Substring(1, 2), 16),
Convert.ToInt32(htmlColor.Substring(3, 2), 16),
Convert.ToInt32(htmlColor.Substring(5, 2), 16));
}
else {
string r = Char.ToString(htmlColor[1]);
string g = Char.ToString(htmlColor[2]);
string b = Char.ToString(htmlColor[3]);
c = Color.FromArgb(Convert.ToInt32(r + r, 16),
Convert.ToInt32(g + g, 16),
Convert.ToInt32(b + b, 16));
}
}
// special case. Html requires LightGrey, but .NET uses LightGray
if (c.IsEmpty && String.Equals(htmlColor, "LightGrey", StringComparison.OrdinalIgnoreCase))
{
c = Color.LightGray;
}
// System color
if (c.IsEmpty) {
if (htmlSysColorTable == null) {
InitializeHtmlSysColorTable();
}
object o = htmlSysColorTable[htmlColor.ToLower(CultureInfo.InvariantCulture)];
if (o != null) {
c = (Color)o;
}
}
// resort to type converter which will handle named colors
if (c.IsEmpty) {
c = (Color)TypeDescriptor.GetConverter(typeof(Color)).ConvertFromString(htmlColor);
}
return c;
}
///
///
/// Translates the specified
///
public static string ToHtml(Color c) {
string colorString = String.Empty;
if (c.IsEmpty)
return colorString;
if (c.IsSystemColor) {
switch (c.ToKnownColor()) {
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;
}
}
else 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;
}
private static void InitializeHtmlSysColorTable() {
htmlSysColorTable = new Hashtable(26);
htmlSysColorTable["activeborder"] = Color.FromKnownColor(KnownColor.ActiveBorder);
htmlSysColorTable["activecaption"] = Color.FromKnownColor(KnownColor.ActiveCaption);
htmlSysColorTable["appworkspace"] = Color.FromKnownColor(KnownColor.AppWorkspace);
htmlSysColorTable["background"] = Color.FromKnownColor(KnownColor.Desktop);
htmlSysColorTable["buttonface"] = Color.FromKnownColor(KnownColor.Control);
htmlSysColorTable["buttonhighlight"] = Color.FromKnownColor(KnownColor.ControlLightLight);
htmlSysColorTable["buttonshadow"] = Color.FromKnownColor(KnownColor.ControlDark);
htmlSysColorTable["buttontext"] = Color.FromKnownColor(KnownColor.ControlText);
htmlSysColorTable["captiontext"] = Color.FromKnownColor(KnownColor.ActiveCaptionText);
htmlSysColorTable["graytext"] = Color.FromKnownColor(KnownColor.GrayText);
htmlSysColorTable["highlight"] = Color.FromKnownColor(KnownColor.Highlight);
htmlSysColorTable["highlighttext"] = Color.FromKnownColor(KnownColor.HighlightText);
htmlSysColorTable["inactiveborder"] = Color.FromKnownColor(KnownColor.InactiveBorder);
htmlSysColorTable["inactivecaption"] = Color.FromKnownColor(KnownColor.InactiveCaption);
htmlSysColorTable["inactivecaptiontext"] = Color.FromKnownColor(KnownColor.InactiveCaptionText);
htmlSysColorTable["infobackground"] = Color.FromKnownColor(KnownColor.Info);
htmlSysColorTable["infotext"] = Color.FromKnownColor(KnownColor.InfoText);
htmlSysColorTable["menu"] = Color.FromKnownColor(KnownColor.Menu);
htmlSysColorTable["menutext"] = Color.FromKnownColor(KnownColor.MenuText);
htmlSysColorTable["scrollbar"] = Color.FromKnownColor(KnownColor.ScrollBar);
htmlSysColorTable["threeddarkshadow"] = Color.FromKnownColor(KnownColor.ControlDarkDark);
htmlSysColorTable["threedface"] = Color.FromKnownColor(KnownColor.Control);
htmlSysColorTable["threedhighlight"] = Color.FromKnownColor(KnownColor.ControlLight);
htmlSysColorTable["threedlightshadow"] = Color.FromKnownColor(KnownColor.ControlLightLight);
htmlSysColorTable["window"] = Color.FromKnownColor(KnownColor.Window);
htmlSysColorTable["windowframe"] = Color.FromKnownColor(KnownColor.WindowFrame);
htmlSysColorTable["windowtext"] = Color.FromKnownColor(KnownColor.WindowText);
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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