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<?xml version="1.0" encoding="utf-8"?>
<packages>
  <package id="FontAwesome.WPF" version="4.7.0.9" targetFramework="net461" />
  <package id="MahApps.Metro" version="1.5.0" targetFramework="net461" />
  <package id="Microsoft.WindowsAPICodePack-Core" version="1.1.0.0" targetFramework="net461" />
  <package id="Microsoft.WindowsAPICodePack-Shell" version="1.1.0.0" targetFramework="net461" />
</packages>
generated by cgit v1.3.1 (git 2.54.0) at 2026-07-08 01:42:25 +0000
#dd2200; background-color: #fff0f0 } /* Literal.String.Doc */ .highlight .s2 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Double */ .highlight .se { color: #0044dd; background-color: #fff0f0 } /* Literal.String.Escape */ .highlight .sh { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Heredoc */ .highlight .si { color: #3333bb; background-color: #fff0f0 } /* Literal.String.Interpol */ .highlight .sx { color: #22bb22; background-color: #f0fff0 } /* Literal.String.Other */ .highlight .sr { color: #008800; background-color: #fff0ff } /* Literal.String.Regex */ .highlight .s1 { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Single */ .highlight .ss { color: #aa6600; background-color: #fff0f0 } /* Literal.String.Symbol */ .highlight .bp { color: #003388 } /* Name.Builtin.Pseudo */ .highlight .fm { color: #0066bb; font-weight: bold } /* Name.Function.Magic */ .highlight .vc { color: #336699 } /* Name.Variable.Class */ .highlight .vg { color: #dd7700 } /* Name.Variable.Global */ .highlight .vi { color: #3333bb } /* Name.Variable.Instance */ .highlight .vm { color: #336699 } /* Name.Variable.Magic */ .highlight .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */
// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)

using System;
using System.Collections.ObjectModel;

namespace Tango.Scripting.Editors.Utils
{
	/// <summary>
	/// A collection where adding and removing items causes a callback.
	/// It is valid for the onAdd callback to throw an exception - this will prevent the new item from
	/// being added to the collection.
	/// </summary>
	sealed class ObserveAddRemoveCollection<T> : Collection<T>
	{
		readonly Action<T> onAdd, onRemove;
		
		public ObserveAddRemoveCollection(Action<T> onAdd, Action<T> onRemove)
		{
			this.onAdd = onAdd;
			this.onRemove = onRemove;
		}
		
		protected override void ClearItems()
		{
			if (onRemove != null) {
				foreach (T val in this)
					onRemove(val);
			}
			base.ClearItems();
		}
		
		protected override void InsertItem(int index, T item)
		{
			if (onAdd != null)
				onAdd(item);
			base.InsertItem(index, item);
		}
		
		protected override void RemoveItem(int index)
		{
			if (onRemove != null)
				onRemove(this[index]);
			base.RemoveItem(index);
		}
		
		protected override void SetItem(int index, T item)
		{
			if (onRemove != null)
				onRemove(this[index]);
			try {
				if (onAdd != null)
					onAdd(item);
			} catch {
				// When adding the new item fails, just remove the old one
				// (we cannot keep the old item since we already successfully called onRemove for it)
				base.RemoveAt(index);
				throw;
			}
			base.SetItem(index, item);
		}
	}
}
generated by cgit v1.3.1 (git 2.54.0) at 2026-07-08 01:42:24 +0000