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// 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;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Collections.Specialized;
using System.Linq;
namespace Tango.Scripting.Editors.Xml
{
/// <summary>
/// Collection that is publicly read-only and has support
/// for adding/removing multiple items at a time.
/// </summary>
public class AXmlObjectCollection<T>: Collection<T>, INotifyCollectionChanged
{
/// <summary> Occurs when the collection is changed </summary>
public event NotifyCollectionChangedEventHandler CollectionChanged;
/// <summary> Raises <see cref="CollectionChanged"/> event </summary>
// Do not inherit - it is not called if event is null
void OnCollectionChanged(NotifyCollectionChangedEventArgs e)
{
if (CollectionChanged != null) {
CollectionChanged(this, e);
}
}
/// <inheritdoc/>
protected override void ClearItems()
{
throw new NotSupportedException();
}
/// <inheritdoc/>
protected override void InsertItem(int index, T item)
{
throw new NotSupportedException();
}
/// <inheritdoc/>
protected override void RemoveItem(int index)
{
throw new NotSupportedException();
}
/// <inheritdoc/>
protected override void SetItem(int index, T item)
{
throw new NotSupportedException();
}
internal void InsertItemAt(int index, T item)
{
base.InsertItem(index, item);
if (CollectionChanged != null)
OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Add, new T[] { item }.ToList(), index));
}
internal void RemoveItemAt(int index)
{
T removed = this[index];
base.RemoveItem(index);
if (CollectionChanged != null)
OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Remove, new T[] { removed }.ToList(), index));
}
internal void InsertItemsAt(int index, IList<T> items)
{
for(int i = 0; i < items.Count; i++) {
base.InsertItem(index + i, items[i]);
}
if (CollectionChanged != null)
OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Add, (IList)items, index));
}
internal void RemoveItemsAt(int index, int count)
{
List<T> removed = new List<T>();
for(int i = 0; i < count; i++) {
removed.Add(this[index]);
base.RemoveItem(index);
}
if (CollectionChanged != null)
OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Remove, (IList)removed, index));
}
}
}
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