DeferredBinaryDeserializerExtension.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Framework / System / Windows / Markup / Baml2006 / DeferredBinaryDeserializerExtension.cs / 1305600 / DeferredBinaryDeserializerExtension.cs
                        

                        
                            using System; 
using System.Collections.Generic;
using System.Text;
using System.Windows.Markup;
using System.IO; 
using System.Windows.Media;
using MS.Internal; 
using System.Windows.Media.Media3D; 
using System.ComponentModel;
 
namespace System.Windows.Baml2006
{
    internal class DeferredBinaryDeserializerExtension : MarkupExtension
    { 
        private IFreezeFreezables _freezer;
        private bool _canFreeze; 
        private readonly BinaryReader _reader; 
        private readonly Stream _stream;
        private readonly int _converterId; 
        public DeferredBinaryDeserializerExtension(IFreezeFreezables freezer, BinaryReader reader, int converterId, int dataByteSize)
        {
            _freezer = freezer;
            // We need to evaluate this immediately since ProvideValue may be called much later. 
            _canFreeze = freezer.FreezeFreezables;
            byte[] bytes = reader.ReadBytes(dataByteSize); 
            _stream = new MemoryStream(bytes); 
            _reader = new BinaryReader(_stream);
            _converterId = converterId; 
        }

        public override object ProvideValue(IServiceProvider serviceProvider)
        { 
            _stream.Position = 0;
            switch (_converterId) 
            { 
                case Baml2006SchemaContext.KnownTypes.XamlBrushSerializer:
                    return System.Windows.Media.SolidColorBrush.DeserializeFrom(_reader, 
                        new DeferredBinaryDeserializerExtensionContext(serviceProvider, _freezer, _canFreeze));
                case Baml2006SchemaContext.KnownTypes.XamlPathDataSerializer:
                    return Parsers.DeserializeStreamGeometry(_reader);
                case Baml2006SchemaContext.KnownTypes.XamlPoint3DCollectionSerializer: 
                    return Point3DCollection.DeserializeFrom(_reader);
                case Baml2006SchemaContext.KnownTypes.XamlPointCollectionSerializer: 
                    return PointCollection.DeserializeFrom(_reader); 
                case Baml2006SchemaContext.KnownTypes.XamlVector3DCollectionSerializer:
                    return Vector3DCollection.DeserializeFrom(_reader); 
                default:
                    throw new NotImplementedException();
            }
        } 

        private class DeferredBinaryDeserializerExtensionContext : ITypeDescriptorContext, IFreezeFreezables 
        { 
            private IServiceProvider _serviceProvider;
            private IFreezeFreezables _freezer; 
            private bool _canFreeze;
            public DeferredBinaryDeserializerExtensionContext(IServiceProvider serviceProvider, IFreezeFreezables freezer, bool canFreeze)
            {
                _freezer = freezer; 
                _canFreeze = canFreeze;
                _serviceProvider = serviceProvider; 
            } 

            object IServiceProvider.GetService(Type serviceType) 
            {
                if (serviceType == typeof(IFreezeFreezables))
                {
                    return this; 
                }
                return _serviceProvider.GetService(serviceType); 
            } 

            #region ITypeDescriptorContext Methods 
            // ITypeDescriptorContext derives from IServiceProvider.
            void ITypeDescriptorContext.OnComponentChanged()
            {
            } 

            bool ITypeDescriptorContext.OnComponentChanging() 
            { 
                return false;
            } 

            IContainer ITypeDescriptorContext.Container
            {
                get { return null; } 
            }
 
            object ITypeDescriptorContext.Instance 
            {
                get { return null; } 
            }

            PropertyDescriptor ITypeDescriptorContext.PropertyDescriptor
            { 
                get { return null; }
            } 
            #endregion 

            #region IFreezeFreezables Members 

            bool IFreezeFreezables.FreezeFreezables
            {
                get { return _canFreeze;  } 
            }
 
            bool IFreezeFreezables.TryFreeze(string value, Freezable freezable) 
            {
                return _freezer.TryFreeze(value, freezable); 
            }

            Freezable IFreezeFreezables.TryGetFreezable(string value)
            { 
                return _freezer.TryGetFreezable(value);
            } 
 
            #endregion
        } 
    }
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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