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//------------------------------------------------------------------------------
// <copyright file="ObjectListItemCollection.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
using System;
using System.ComponentModel;
using System.Collections;
using System.Diagnostics;
using System.Web;
using System.Web.UI;
using System.Security.Permissions;
namespace System.Web.UI.MobileControls
{
/*
* Object List Item collection class. Does not derive from MobileListItemCollection,
* because much of the functionality there is disallowed here.
*
* Copyright (c) 2000 Microsoft Corporation
*/
/// <include file='doc\ObjectListItemCollection.uex' path='docs/doc[@for="ObjectListItemCollection"]/*' />
[AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)]
[AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)]
[Obsolete("The System.Web.Mobile.dll assembly has been deprecated and should no longer be used. For information about how to develop ASP.NET mobile applications, see http://go.microsoft.com/fwlink/?LinkId=157231.")]
public class ObjectListItemCollection : ArrayListCollectionBase, IStateManager
{
private bool _marked = false;
private bool _dirty = false;
private ObjectList _owner;
private int _baseIndex = 0;
internal ObjectListItemCollection(ObjectList owner)
{
_owner = owner;
}
internal int BaseIndex
{
get
{
return _baseIndex;
}
set
{
_baseIndex = value;
}
}
/// <include file='doc\ObjectListItemCollection.uex' path='docs/doc[@for="ObjectListItemCollection.GetAll"]/*' />
public ObjectListItem[] GetAll()
{
int n = Count;
ObjectListItem[] result = new ObjectListItem[n];
if (n > 0)
{
Items.CopyTo (0, result, 0, n);
}
return result;
}
/// <include file='doc\ObjectListItemCollection.uex' path='docs/doc[@for="ObjectListItemCollection.this"]/*' />
public ObjectListItem this[int index]
{
get
{
return (ObjectListItem)Items[index];
}
}
internal void Add(ObjectListItem item)
{
Items.Add (item);
if (_marked)
{
_dirty = true;
item.Dirty = true;
}
}
/// <include file='doc\ObjectListItemCollection.uex' path='docs/doc[@for="ObjectListItemCollection.Clear"]/*' />
public void Clear()
{
Items.Clear ();
if (_marked)
{
_dirty = true;
}
}
/// <include file='doc\ObjectListItemCollection.uex' path='docs/doc[@for="ObjectListItemCollection.Contains"]/*' />
public bool Contains(ObjectListItem item)
{
return Items.Contains (item);
}
/// <include file='doc\ObjectListItemCollection.uex' path='docs/doc[@for="ObjectListItemCollection.IndexOf"]/*' />
public int IndexOf(ObjectListItem item)
{
return Items.IndexOf(item);
}
/////////////////////////////////////////////////////////////////////////
// STATE MANAGEMENT
/////////////////////////////////////////////////////////////////////////
/// <internalonly/>
protected bool IsTrackingViewState
{
get
{
return _marked;
}
}
/// <internalonly/>
protected void TrackViewState()
{
_marked = true;
foreach (IStateManager item in Items)
{
item.TrackViewState();
}
}
/// <internalonly/>
protected void LoadViewState(Object state)
{
if (state != null)
{
Object[] changes = (Object[])state;
Debug.Assert (changes.Length == 2);
if (changes[0] == null)
{
Clear ();
}
else
{
Object[] itemChanges = (Object[])changes[0];
EnsureCount (itemChanges.Length);
int i = 0;
foreach (IStateManager item in Items)
{
item.LoadViewState (itemChanges[i++]);
}
}
int oldBaseIndex = BaseIndex;
BaseIndex = (int)changes[1];
if (oldBaseIndex != BaseIndex)
{
int index = BaseIndex;
foreach (ObjectListItem item in Items)
{
item.SetIndex(index++);
}
}
}
}
/// <internalonly/>
protected Object SaveViewState()
{
if (!_dirty)
{
return null;
}
Object[] itemChanges;
if (Count > 0)
{
itemChanges = new Object[Count];
int i = 0;
foreach (IStateManager item in Items)
{
itemChanges[i++] = item.SaveViewState ();
}
}
else
{
itemChanges = null;
}
if (itemChanges == null && BaseIndex == 0)
{
return null;
}
else
{
return new Object[2] { itemChanges, BaseIndex };
}
}
private void EnsureCount(int count)
{
int diff = Count - count;
if (diff > 0)
{
Items.RemoveRange (count, diff);
if (_marked)
{
_dirty = true;
}
}
else
{
for (int i = Count; i < count; i++)
{
ObjectListItem item = new ObjectListItem(_owner);
item.SetIndex(i + BaseIndex);
Add (item);
}
}
}
#region Implementation of IStateManager
/// <internalonly/>
bool IStateManager.IsTrackingViewState {
get {
return IsTrackingViewState;
}
}
/// <internalonly/>
void IStateManager.LoadViewState(object state) {
LoadViewState(state);
}
/// <internalonly/>
void IStateManager.TrackViewState() {
TrackViewState();
}
/// <internalonly/>
object IStateManager.SaveViewState() {
return SaveViewState();
}
#endregion
}
}
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