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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
/*++
Abstract:
This file contains the definition of a class that defines
the common functionality required to serialize a
UIElementCollection
--*/
using System;
using System.Collections;
using System.Collections.Specialized;
using System.ComponentModel;
using System.Diagnostics;
using System.Reflection;
using System.Xml;
using System.IO;
using System.Security;
using System.ComponentModel.Design.Serialization;
using System.Windows.Xps.Packaging;
using System.Windows.Documents;
using System.Windows.Media;
using System.Windows.Markup;
namespace System.Windows.Xps.Serialization
{
/// <summary>
/// Class defining common functionality required to
/// serialize a UIElementCollection.
/// </summary>
internal class ReachUIElementCollectionSerializerAsync :
ReachSerializerAsync
{
#region Constructor
/// <summary>
/// Constructor for class ReachUIElementCollectionSerializer
/// </summary>
/// <param name="manager">
/// The serialization manager, the services of which are
/// used later in the serialization process of the type.
/// </param>
public
ReachUIElementCollectionSerializerAsync(
PackageSerializationManager manager
):
base(manager)
{
}
#endregion Constructor
#region Public Methods
public
override
void
AsyncOperation(
ReachSerializerContext context
)
{
if(context == null)
{
}
switch (context.Action)
{
case SerializerAction.endPersistObjectData:
{
EndPersistObjectData();
break;
}
case SerializerAction.serializeNextUIElement:
{
UIElementCollectionSerializerContext thisContext = context as UIElementCollectionSerializerContext;
if(thisContext != null)
{
SerializeNextUIElement(thisContext.Enumerator,
thisContext.ObjectContext);
}
break;
}
default:
{
base.AsyncOperation(context);
break;
}
}
}
/// <summary>
/// The main method that is called to serialize a UIElementCollection.
/// </summary>
/// <param name="serializedObject">
/// Instance of object to be serialized.
/// </param>
public
override
void
SerializeObject(
Object serializedObject
)
{
base.SerializeObject(serializedObject);
}
#endregion Public Methods
#region Internal Methods
/// <summary>
/// The method is called once the object data is discovered at that
/// point of the serialization process.
/// </summary>
/// <param name="serializableObjectContext">
/// The context of the object to be serialized at this time.
/// </param>
internal
override
void
PersistObjectData(
SerializableObjectContext serializableObjectContext
)
{
ArgumentNullException.ThrowIfNull(serializableObjectContext);
IEnumerable enumerableObject = serializableObjectContext.TargetObject as IEnumerable;
if (enumerableObject == null)
{
throw new XpsSerializationException(SR.Format(SR.MustBeOfType, "serializableObjectContext.TargetObject", typeof(IEnumerable)));
}
//
// Serialize the PageContent Items contained within the collection
//
SerializeUIElements(serializableObjectContext);
}
#endregion Internal Methods
#region Private Methods
/// <summary>
/// This is being called to serialize the Page Content items
/// contained within the collection
/// </summary>
private
void
SerializeUIElements(
SerializableObjectContext serializableObjectContext
)
{
//
// Serialize each PageContent in PageContentCollection
//
IEnumerator enumerator = ((IEnumerable)serializableObjectContext.TargetObject).GetEnumerator();
enumerator.Reset();
UIElementCollectionSerializerContext context = new UIElementCollectionSerializerContext(this,
serializableObjectContext,
enumerator,
SerializerAction.serializeNextUIElement);
((IXpsSerializationManagerAsync)SerializationManager).OperationStack.Push(context);
}
private
void
SerializeNextUIElement(
IEnumerator enumerator,
SerializableObjectContext serializableObjectContext
)
{
if(enumerator.MoveNext())
{
UIElementCollectionSerializerContext context = new UIElementCollectionSerializerContext(this,
serializableObjectContext,
enumerator,
SerializerAction.serializeNextUIElement);
((IXpsSerializationManagerAsync)SerializationManager).OperationStack.Push(context);
object uiElement = enumerator.Current;
SerializeUIElement(uiElement);
}
}
/// <summary>
/// Called to serialize a single UIElement
/// </summary>
private
void
SerializeUIElement(
object uiElement
)
{
Visual visual = uiElement as Visual;
if(visual != null)
{
ReachSerializer serializer = SerializationManager.GetSerializer(visual);
if(serializer!=null)
{
serializer.SerializeObject(visual);
}
else
{
throw new XpsSerializationException(SR.ReachSerialization_NoSerializer);
}
}
}
#endregion Private Methods
};
internal class UIElementCollectionSerializerContext :
ReachSerializerContext
{
public
UIElementCollectionSerializerContext(
ReachSerializerAsync serializer,
SerializableObjectContext objectContext,
IEnumerator enumerator,
SerializerAction action
):
base(serializer,objectContext,action)
{
this._enumerator = enumerator;
}
public
IEnumerator
Enumerator
{
get
{
return _enumerator;
}
}
private
IEnumerator _enumerator;
};
}
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