mono/mcs/class/System/System.ComponentModel/CategoryAttribute.cs

//
// System.ComponentModel.CategoryAttribute.cs
//
// Author:
//  Miguel de Icaza ([email protected])
//  Andreas Nahr ([email protected])
//
// (C) Ximian, Inc.  http://www.ximian.com
// (C) 2003 Andreas Nahr
//
//

namespace System.ComponentModel {

	[AttributeUsage (AttributeTargets.Property | AttributeTargets.Event)]
	public class CategoryAttribute : Attribute
	{
		private string category;
		private bool IsLocalized = false;

		public static readonly CategoryAttribute Default = new CategoryAttribute ();
		public static readonly CategoryAttribute Action = new CategoryAttribute ("Action");
		public static readonly CategoryAttribute Appearance = new CategoryAttribute ("Appearance");
		public static readonly CategoryAttribute Behavior = new CategoryAttribute ("Behavior");
		public static readonly CategoryAttribute Data = new CategoryAttribute ("Data");
		public static readonly CategoryAttribute Design = new CategoryAttribute ("Design");
		public static readonly CategoryAttribute DragDrop = new CategoryAttribute ("Drag Drop");
		public static readonly CategoryAttribute Focus = new CategoryAttribute ("Focus");
		public static readonly CategoryAttribute Format = new CategoryAttribute ("Format");
		public static readonly CategoryAttribute Key = new CategoryAttribute ("Key");
		public static readonly CategoryAttribute Layout = new CategoryAttribute ("Layout");
		public static readonly CategoryAttribute Mouse = new CategoryAttribute ("Mouse");
		public static readonly CategoryAttribute WindowStyle = new CategoryAttribute ("Window Style");


		public CategoryAttribute ()
		{
			this.category = "Misc";
		}


		public CategoryAttribute (string category)
		{
			this.category = category;
		}

		protected virtual string GetLocalizedString (string value)
		{
			// FIXME: Check if other implementation exists
			return null;
		}

		public string Category {
			get {
				if (IsLocalized == false) {
					IsLocalized = true;
					string LocalizedString = GetLocalizedString (category);
					if (LocalizedString != null)
						category = LocalizedString;
				}

				return category;
			}
		}

		public override bool Equals (object obj)
		{
			if (!(obj is CategoryAttribute))
				return false;
			if (obj == this)
				return true;
			return ((CategoryAttribute) obj).Category == category;
		}

		public override int GetHashCode ()
		{
			return category.GetHashCode ();
		}

		public override bool IsDefaultAttribute ()
		{
			return category == CategoryAttribute.Default.Category;
		}

		// OLD IMPLEMENTATION - redid the implementation without storing any of the static
		// members which require to do locks to keep in sync
		//		static CategoryAttribute action, appearance, behaviour, data,   def;
		//		static CategoryAttribute design, drag_drop,  focus,     format, key;
		//		static CategoryAttribute layout, mouse,      window_style;
		//		
		//		public CategoryAttribute (string category)
		//		{
		//			this.category = category;
		//		}
		//
		//		public CategoryAttribute ()
		//		{
		//			this.category = "Misc";
		//		}
		//
		//		[MonoTODO]
		//		protected virtual string GetLocalizedString (string value)
		//		{
		//			// FIXME: IMPLEMENT
		//
		//			return category;
		//		}
		//
		//		public string Category {
		//			get {
		//				return category;
		//			}
		//		}
		//		
		//		public static CategoryAttribute Action {
		//			get {
		//				if (action != null)
		//					return action;
		//
		//				lock (typeof (CategoryAttribute)){
		//					if (action == null)
		//						action = new CategoryAttribute ("Action");
		//				}
		//
		//				return action;
		//			}
		//		}
		//
		//		public static CategoryAttribute Appearance {
		//			get {
		//				if (appearance != null)
		//					return appearance;
		//
		//				lock (typeof (CategoryAttribute)){
		//					if (appearance == null)
		//						appearance = new CategoryAttribute ("Appearance");
		//				}
		//
		//				return appearance;
		//			}
		//		}
		//
		//		public static CategoryAttribute Behaviour {
		//			get {
		//				if (behaviour != null)
		//					return behaviour;
		//
		//				lock (typeof (CategoryAttribute)){
		//					if (behaviour == null)
		//						behaviour = new CategoryAttribute ("Action");
		//				}
		//
		//				return behaviour;
		//			}
		//		}
		//
		//		public static CategoryAttribute Data {
		//			get {
		//				if (data != null)
		//					return data;
		//
		//				lock (typeof (CategoryAttribute)){
		//					if (data == null)
		//						data = new CategoryAttribute ("Data");
		//				}
		//
		//				return data;
		//			}
		//		}
		//
		//		public static CategoryAttribute Default {
		//			get {
		//				if (def != null)
		//					return def;
		//
		//				lock (typeof (CategoryAttribute)){
		//					if (def == null)
		//						def = new CategoryAttribute ("Default");
		//				}
		//
		//				return def;
		//			}
		//		}
		//
		//		public static CategoryAttribute Design {
		//			get {
		//				if (design != null)
		//					return design;
		//
		//				lock (typeof (CategoryAttribute)){
		//					if (design == null)
		//						design = new CategoryAttribute ("Design");
		//				}
		//
		//				return design;
		//			}
		//		}
		//
		//		public static CategoryAttribute DragDrop {
		//			get {
		//				if (drag_drop != null)
		//					return drag_drop;
		//
		//				lock (typeof (CategoryAttribute)){
		//					if (drag_drop == null)
		//						drag_drop = new CategoryAttribute ("Drag Drop");
		//				}
		//
		//				return drag_drop;
		//			}
		//		}
		//
		//		public static CategoryAttribute Focus {
		//			get {
		//				if (focus != null)
		//					return focus;
		//
		//				lock (typeof (CategoryAttribute)){
		//					if (focus == null)
		//						focus = new CategoryAttribute ("Focus");
		//				}
		//
		//				return focus;
		//			}
		//		}
		//
		//		public static CategoryAttribute Format {
		//			get {
		//				if (format != null)
		//					return format;
		//
		//				lock (typeof (CategoryAttribute)){
		//					if (format == null)
		//						format = new CategoryAttribute ("Format");
		//				}
		//
		//				return format;
		//			}
		//		}
		//
		//		public static CategoryAttribute Key {
		//			get {
		//				if (key != null)
		//					return key;
		//
		//				lock (typeof (CategoryAttribute)){
		//					if (key == null)
		//						key = new CategoryAttribute ("Key");
		//				}
		//
		//				return key;
		//			}
		//		}
		//
		//		public static CategoryAttribute Layout {
		//			get {
		//				if (layout != null)
		//					return layout;
		//
		//				lock (typeof (CategoryAttribute)){
		//					if (layout == null)
		//						layout = new CategoryAttribute ("Layout");
		//				}
		//
		//				return layout;
		//			}
		//		}
		//
		//		public static CategoryAttribute Mouse {
		//			get {
		//				if (mouse != null)
		//					return mouse;
		//
		//				lock (typeof (CategoryAttribute)){
		//					if (mouse == null)
		//						mouse = new CategoryAttribute ("Mouse");
		//				}
		//
		//				return mouse;
		//			}
		//		}
		//
		//		public static CategoryAttribute WindowStyle {
		//			get {
		//				if (window_style != null)
		//					return window_style;
		//
		//				lock (typeof (CategoryAttribute)){
		//					if (window_style == null)
		//						window_style = new CategoryAttribute ("Window Style");
		//				}
		//
		//				return window_style;
		//			}
		//		}
	}
}