WpfSharedXamlSchemaContext.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 / WpfSharedXamlSchemaContext.cs / 1305600 / WpfSharedXamlSchemaContext.cs
                        

                        
                            using System; 
using System.Collections.Generic;
using System.Text;
using System.Xaml;
 
namespace System.Windows.Baml2006
{ 
    ///  
    /// This schema context is shared between all the WPF XAML loads in an AppDomain, including both
    /// full and partial trust callers. To be safe for sharing, it must be idempotent and order-independent. 
    /// See the SecurityNote on XamlSchemaContext for more details.
    /// 
    internal class WpfSharedXamlSchemaContext : WpfSharedBamlSchemaContext
    { 
        // V3 Rules are:
        //  Simple Collection rules: We only lookup IList & IDictionary (no add methods) (The MarkupCompiler doesn't support this) 
        //  No Deferring Loader lookup on XamlMember (The MarkupCompiler doesn't support this) 
        public WpfSharedXamlSchemaContext(XamlSchemaContextSettings settings, bool useV3Rules) : base(settings)
        { 
            _useV3Rules = useV3Rules;
        }

        public override XamlType GetXamlType(Type type) 
        {
            if (type == null) 
            { 
                throw new ArgumentNullException("type");
            } 

            XamlType xType;

            lock (_syncObject) 
            {
                if (!_masterTypeTable.TryGetValue(type, out xType)) 
                { 
                    RequireRuntimeType(type);
                    xType = CreateKnownBamlType(type.Name, false, _useV3Rules); 
                    if (xType == null || xType.UnderlyingType != type)
                    {
                        xType = new WpfXamlType(type, this, false /* isBamlType */, _useV3Rules);
                    } 
                    _masterTypeTable.Add(type, xType);
                } 
            } 

            return xType; 
        }

        internal static void RequireRuntimeType(Type type)
        { 
            // To avoid injection of derived System.Types that lie about their identity
            // (and spoof other types), only allow RuntimeTypes. 
            // S.W.M.XamlReader only supports live reflection, anyway. 
            Type runtimeType = typeof(object).GetType();
            if (!runtimeType.IsAssignableFrom(type.GetType())) 
            {
                throw new ArgumentException(SR.Get(SRID.RuntimeTypeRequired, type), "type");
            }
        } 

        // Allow wrapping SchemaContexts a way to call into the protected overload of GetXamlType 
        internal XamlType GetXamlTypeInternal(string xamlNamespace, string name, params XamlType[] typeArguments) 
        {
            return base.GetXamlType(xamlNamespace, name, typeArguments); 
        }

        private Dictionary _masterTypeTable = new Dictionary();
        private object _syncObject = new Object(); 
        private bool _useV3Rules;
    } 
} 

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

Link Menu

Network programming in C#, Network Programming in VB.NET, Network Programming in .NET
This book is available now!
Buy at Amazon US or
Buy at Amazon UK