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Imported Upstream version 4.0.0~alpha1
Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9
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Jo Shields
@ -24,197 +24,8 @@
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// Brian O'Keefe (zer0keefie@gmail.com)
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//
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#if NET_4_0
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using System.Collections.Specialized;
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using System.Runtime.CompilerServices;
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[assembly:TypeForwardedTo (typeof (NotifyCollectionChangedEventArgs))]
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#else
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namespace System.Collections.Specialized {
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public class NotifyCollectionChangedEventArgs : EventArgs {
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private NotifyCollectionChangedAction action;
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private IList oldItems, newItems;
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private int oldIndex = -1, newIndex = -1;
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#region Constructors
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public NotifyCollectionChangedEventArgs (NotifyCollectionChangedAction action)
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{
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this.action = action;
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if (action != NotifyCollectionChangedAction.Reset)
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throw new ArgumentException ("This constructor can only be used with the Reset action.", "action");
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}
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public NotifyCollectionChangedEventArgs (NotifyCollectionChangedAction action, IList changedItems)
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: this (action, changedItems, -1)
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{
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}
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public NotifyCollectionChangedEventArgs (NotifyCollectionChangedAction action, object changedItem)
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: this (action, changedItem, -1)
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{
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}
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public NotifyCollectionChangedEventArgs (NotifyCollectionChangedAction action, IList newItems, IList oldItems)
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: this (action, newItems, oldItems, -1)
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{
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}
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public NotifyCollectionChangedEventArgs (NotifyCollectionChangedAction action, IList changedItems, int startingIndex)
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{
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this.action = action;
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if (action == NotifyCollectionChangedAction.Add || action == NotifyCollectionChangedAction.Remove) {
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if (changedItems == null)
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throw new ArgumentNullException ("changedItems");
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if (startingIndex < -1)
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throw new ArgumentException ("The value of startingIndex must be -1 or greater.", "startingIndex");
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if (action == NotifyCollectionChangedAction.Add)
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InitializeAdd (changedItems, startingIndex);
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else
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InitializeRemove (changedItems, startingIndex);
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} else if (action == NotifyCollectionChangedAction.Reset) {
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if (changedItems != null)
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throw new ArgumentException ("This constructor can only be used with the Reset action if changedItems is null", "changedItems");
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if (startingIndex != -1)
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throw new ArgumentException ("This constructor can only be used with the Reset action if startingIndex is -1", "startingIndex");
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} else {
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throw new ArgumentException ("This constructor can only be used with the Reset, Add, or Remove actions.", "action");
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}
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}
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public NotifyCollectionChangedEventArgs (NotifyCollectionChangedAction action, object changedItem, int index)
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{
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IList changedItems = new object [] { changedItem };
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this.action = action;
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if (action == NotifyCollectionChangedAction.Add)
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InitializeAdd (changedItems, index);
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else if (action == NotifyCollectionChangedAction.Remove)
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InitializeRemove (changedItems, index);
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else if (action == NotifyCollectionChangedAction.Reset) {
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if (changedItem != null)
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throw new ArgumentException ("This constructor can only be used with the Reset action if changedItem is null", "changedItem");
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if (index != -1)
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throw new ArgumentException ("This constructor can only be used with the Reset action if index is -1", "index");
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} else {
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throw new ArgumentException ("This constructor can only be used with the Reset, Add, or Remove actions.", "action");
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}
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}
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public NotifyCollectionChangedEventArgs (NotifyCollectionChangedAction action, object newItem, object oldItem)
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: this (action, newItem, oldItem, -1)
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{
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}
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public NotifyCollectionChangedEventArgs (NotifyCollectionChangedAction action, IList newItems, IList oldItems, int index)
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{
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this.action = action;
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if (action != NotifyCollectionChangedAction.Replace)
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throw new ArgumentException ("This constructor can only be used with the Replace action.", "action");
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if (newItems == null)
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throw new ArgumentNullException ("newItems");
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if (oldItems == null)
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throw new ArgumentNullException ("oldItems");
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this.oldItems = oldItems;
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this.newItems = newItems;
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oldIndex = index;
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newIndex = index;
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}
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public NotifyCollectionChangedEventArgs (NotifyCollectionChangedAction action, IList changedItems, int index, int oldIndex)
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{
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this.action = action;
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if (action != NotifyCollectionChangedAction.Move)
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throw new ArgumentException ("This constructor can only be used with the Move action.", "action");
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if (index < -1)
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throw new ArgumentException ("The value of index must be -1 or greater.", "index");
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InitializeMove (changedItems, index, oldIndex);
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}
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public NotifyCollectionChangedEventArgs (NotifyCollectionChangedAction action, object changedItem, int index, int oldIndex)
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: this (action, new object [] { changedItem }, index, oldIndex)
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{
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}
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public NotifyCollectionChangedEventArgs (NotifyCollectionChangedAction action, object newItem, object oldItem, int index)
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{
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this.action = action;
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if (action != NotifyCollectionChangedAction.Replace)
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throw new ArgumentException ("This constructor can only be used with the Replace action.", "action");
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InitializeReplace (new object [] { newItem }, new object [] { oldItem }, index);
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}
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#endregion
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#region Accessor Properties
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public NotifyCollectionChangedAction Action {
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get { return action; }
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}
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public IList NewItems {
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get { return newItems; }
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}
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public int NewStartingIndex {
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get { return newIndex; }
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}
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public IList OldItems {
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get { return oldItems; }
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}
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public int OldStartingIndex {
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get { return oldIndex; }
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}
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#endregion
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#region Initialize Methods
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private void InitializeAdd(IList items, int index)
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{
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this.newItems = ArrayList.ReadOnly (items);
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this.newIndex = index;
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}
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private void InitializeRemove(IList items, int index)
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{
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this.oldItems = ArrayList.ReadOnly (items);
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this.oldIndex = index;
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}
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private void InitializeMove(IList changedItems, int newItemIndex, int oldItemIndex)
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{
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InitializeAdd (changedItems, newItemIndex);
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InitializeRemove (changedItems, oldItemIndex);
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}
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private void InitializeReplace(IList addedItems, IList removedItems, int index)
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{
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InitializeAdd (addedItems, index);
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InitializeRemove (removedItems, index);
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}
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#endregion
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}
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}
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#endif
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