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//------------------------------------------------------------------------------
// <copyright file="ObjectListFieldCollection.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
using System;
using System.Collections;
using System.Diagnostics;
using System.Globalization;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Security.Permissions;
namespace System.Web.UI.MobileControls
{
/*
* Object List Field Collection class.
*
* Copyright (c) 2000 Microsoft Corporation
*/
/// <include file='doc\ObjectListFieldCollection.uex' path='docs/doc[@for="ObjectListFieldCollection"]/*' />
[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 ObjectListFieldCollection : ArrayListCollectionBase, IObjectListFieldCollection, IStateManager
{
private ObjectList _owner;
private bool _marked = false;
private bool _fieldsSetDirty = false;
// Used for primary field collection (the one modified by the user).
internal ObjectListFieldCollection(ObjectList owner) : base(new ArrayList())
{
_owner = owner;
}
// Used for autogenerated field collections.
internal ObjectListFieldCollection(ObjectList owner, ArrayList fields) : base(fields)
{
_owner = owner;
foreach (ObjectListField field in fields)
{
field.SetOwner(owner);
}
}
/// <include file='doc\ObjectListFieldCollection.uex' path='docs/doc[@for="ObjectListFieldCollection.GetAll"]/*' />
public ObjectListField[] GetAll()
{
int n = Count;
ObjectListField[] allFields = new ObjectListField[n];
if (n > 0)
{
Items.CopyTo(0, allFields, 0, n);
}
return allFields;
}
/// <include file='doc\ObjectListFieldCollection.uex' path='docs/doc[@for="ObjectListFieldCollection.SetAll"]/*' />
public void SetAll(ObjectListField[] value)
{
Items = new ArrayList(value);
foreach(ObjectListField field in Items)
{
field.SetOwner(_owner);
}
if(_marked)
{
SetFieldsDirty();
}
}
/// <include file='doc\ObjectListFieldCollection.uex' path='docs/doc[@for="ObjectListFieldCollection.this"]/*' />
public ObjectListField this[int index]
{
get
{
return (ObjectListField)Items[index];
}
}
/// <include file='doc\ObjectListFieldCollection.uex' path='docs/doc[@for="ObjectListFieldCollection.Add"]/*' />
public void Add(ObjectListField field)
{
AddAt(-1, field);
}
/// <include file='doc\ObjectListFieldCollection.uex' path='docs/doc[@for="ObjectListFieldCollection.AddAt"]/*' />
public void AddAt(int index, ObjectListField field)
{
if (index == -1)
{
Items.Add(field);
}
else
{
Items.Insert(index, field);
}
if (_marked)
{
if (!_fieldsSetDirty && index > -1)
{
SetFieldsDirty();
}
else
{
((IStateManager)field).TrackViewState();
field.SetDirty();
}
}
field.SetOwner(_owner);
NotifyOwnerChange();
}
private void SetFieldsDirty()
{
foreach (ObjectListField fld in Items)
{
((IStateManager)fld).TrackViewState();
fld.SetDirty();
}
_fieldsSetDirty = true;
}
/// <include file='doc\ObjectListFieldCollection.uex' path='docs/doc[@for="ObjectListFieldCollection.Clear"]/*' />
public void Clear()
{
Items.Clear();
if (_marked)
{
// Each field will be marked dirty as it is added.
_fieldsSetDirty = true;
}
NotifyOwnerChange();
}
/// <include file='doc\ObjectListFieldCollection.uex' path='docs/doc[@for="ObjectListFieldCollection.RemoveAt"]/*' />
public void RemoveAt(int index)
{
if ((index >= 0) && (index < Count))
{
Items.RemoveAt(index);
}
if(_marked && !_fieldsSetDirty)
{
SetFieldsDirty();
}
NotifyOwnerChange();
}
/// <include file='doc\ObjectListFieldCollection.uex' path='docs/doc[@for="ObjectListFieldCollection.Remove"]/*' />
public void Remove(ObjectListField field)
{
int index = IndexOf(field);
if (index >= 0)
{
RemoveAt(index);
}
}
/// <include file='doc\ObjectListFieldCollection.uex' path='docs/doc[@for="ObjectListFieldCollection.IndexOf"]/*' />
public int IndexOf(ObjectListField field)
{
if (field != null)
{
return Items.IndexOf(field, 0, Count);
}
return -1;
}
/// <include file='doc\ObjectListFieldCollection.uex' path='docs/doc[@for="ObjectListFieldCollection.IndexOf1"]/*' />
public int IndexOf(String fieldIDOrName)
{
ArrayList fields = Items;
int i = 0;
foreach (ObjectListField field in fields)
{
String id = field.UniqueID;
if (id != null && String.Compare(id, fieldIDOrName, StringComparison.OrdinalIgnoreCase) == 0)
{
return i;
}
i++;
}
return -1;
}
private void NotifyOwnerChange()
{
if (_owner != null)
{
_owner.OnFieldChanged(true); // fieldAddedOrRemoved = true
}
}
/////////////////////////////////////////////////////////////////////////
// STATE MANAGEMENT
/////////////////////////////////////////////////////////////////////////
/// <internalonly/>
protected bool IsTrackingViewState
{
get
{
return _marked;
}
}
/// <internalonly/>
protected void TrackViewState()
{
_marked = true;
foreach (IStateManager field in Items)
{
field.TrackViewState();
}
}
/// <internalonly/>
protected void LoadViewState(Object savedState)
{
if (savedState != null)
{
Object[] stateArray = (Object[]) savedState;
bool allFieldsSaved = (bool) stateArray[0];
if (allFieldsSaved)
{
// All fields are in view state. Any fields loaded until now are invalid.
ClearFieldsViewState();
}
Object[] fieldStates = (Object[])stateArray[1];
EnsureCount(fieldStates.Length);
for (int i = 0; i < fieldStates.Length; i++)
{
((IStateManager)Items[i]).LoadViewState(fieldStates[i]);
}
if (allFieldsSaved)
{
SetFieldsDirty();
}
}
}
/// <internalonly/>
protected Object SaveViewState()
{
int fieldsCount = Count;
if (fieldsCount > 0)
{
Object[] fieldStates = new Object[fieldsCount];
bool haveState = _fieldsSetDirty;
for (int i = 0; i < fieldsCount; i++)
{
fieldStates[i] = ((IStateManager)Items[i]).SaveViewState();
if (fieldStates[i] != null)
{
haveState = true;
}
}
if (haveState)
{
return new Object[]{_fieldsSetDirty, fieldStates};
}
}
return null;
}
private void EnsureCount(int count)
{
int diff = Count - count;
if (diff > 0)
{
Items.RemoveRange(count, diff);
NotifyOwnerChange();
}
else
{
// Set owner = null, to avoid multiple change notifications.
// We'll call it just once later.
ObjectList prevOwner = _owner;
_owner = null;
for (int i = diff; i < 0; i++)
{
ObjectListField field = new ObjectListField();
Add(field);
field.SetOwner(prevOwner);
}
_owner = prevOwner;
NotifyOwnerChange();
}
}
private void ClearFieldsViewState()
{
foreach (ObjectListField field in Items)
{
field.ClearViewState();
}
}
#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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