AppModelKnownContentFactory.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Framework / MS / Internal / AppModel / AppModelKnownContentFactory.cs / 1 / AppModelKnownContentFactory.cs
                        

                        
                            //---------------------------------------------------------------------------- 
//
// 
//    Copyright (C) Microsoft Corporation.  All rights reserved.
//  
//
// Description: 
// Provides a method to turn a baml stream into an object. 
//
// 
// History:
//  11/22/04:    [....]:       Initial Creation
//
// 
//---------------------------------------------------------------------------
using System; 
using System.IO; 

using System.Net; // WebPermission. 
using System.Security;
using System.Security.Permissions;
using System.Windows;
using System.Windows.Markup; 
using System.Windows.Navigation;
using MS.Internal.Controls; 
using MS.Internal.Navigation; 
using MS.Internal.Utility;
using MS.Internal.Resources; 
using System.IO.Packaging;
using MS.Internal.PresentationFramework;
using System.ComponentModel;
 
namespace MS.Internal.AppModel
{ 
    // !!!! Note: Those methods are registered as MimeObjectFactory.StreamToObjectFactoryDelegate. The caller expects the 
    // delgate to close stream.
    internal static class AppModelKnownContentFactory 
    {
        // 
        // Creates an object instance from a Baml stream and it's Uri
        //  
        internal static object BamlConverter(Stream stream, Uri baseUri, bool canUseTopLevelBrowser, bool sandboxExternalContent, bool allowAsync, bool isJournalNavigation, out XamlReader asyncObjectConverter)
        { 
            asyncObjectConverter = null; 

            // If this stream comes from outside the application throw 
            //
            if (!BaseUriHelper.IsPackApplicationUri(baseUri))
            {
                throw new InvalidOperationException(SR.Get(SRID.BamlIsNotSupportedOutsideOfApplicationResources)); 
            }
 
            // If this stream comes from a content file also throw 
            Uri partUri = PackUriHelper.GetPartUri(baseUri);
            string partName, assemblyName, assemblyVersion, assemblyKey; 
            BaseUriHelper.GetAssemblyNameAndPart(partUri, out partName, out assemblyName, out assemblyVersion, out assemblyKey);
            if (ContentFileHelper.IsContentFile(partName))
            {
                throw new InvalidOperationException(SR.Get(SRID.BamlIsNotSupportedOutsideOfApplicationResources)); 
            }
 
            ParserContext pc = new ParserContext(); 

            pc.BaseUri = baseUri; 
            pc.SkipJournaledProperties = isJournalNavigation;

            return Application.LoadBamlStreamWithSyncInfo(stream, pc);
        } 

        //  
        // Creates an object instance from a Xaml stream and it's Uri 
        // 
        /// 
        /// Critical    - Keep track of this, as sandboxing is meant to be a way for an application to
        ///                 isolate xaml content from the hosting application.
        /// TreatAsSafe - the act of putting this content in a new webbrowser control (and by extention, a new PresentationHost)
        ///               isolates the xaml content from the rest of the application. 
        ///
        [SecurityCritical, SecurityTreatAsSafe] 
        internal static object XamlConverter(Stream stream, Uri baseUri, bool canUseTopLevelBrowser, bool sandboxExternalContent, bool allowAsync, bool isJournalNavigation, out XamlReader asyncObjectConverter) 
        {
            asyncObjectConverter = null; 

            if (sandboxExternalContent)
            {
                if (SecurityHelper.AreStringTypesEqual(baseUri.Scheme, BaseUriHelper.PackAppBaseUri.Scheme)) 
                {
                    baseUri = BaseUriHelper.ConvertPackUriToAbsoluteExternallyVisibleUri(baseUri); 
                } 

                stream.Close(); 

                return new WebBrowser(baseUri);;
            }
            else 
            {
                ParserContext pc = new ParserContext(); 
 
                pc.BaseUri = baseUri;
                pc.SkipJournaledProperties = isJournalNavigation; 
                pc.XamlTypeMapper = XmlParserDefaults.DefaultMapper;

                if (allowAsync)
                { 
                    XamlReader xr = new XamlReader();
                    asyncObjectConverter = xr; 
                    xr.LoadCompleted += new AsyncCompletedEventHandler(OnParserComplete); 
                    // XamlReader.Load will close the stream.
                    return xr.LoadAsync(stream, pc); 
                }
                else
                {
                    // XamlReader.Load will close the stream. 
                    return XamlReader.Load(stream, pc);
                } 
            } 
        }
 
 	    private static void OnParserComplete(object sender, AsyncCompletedEventArgs args)
        {
            // We can get this event from cancellation. We do not care about the error if there is any
            // that happened as a result of cancellation. 
            if ((! args.Cancelled) && (args.Error != null))
            { 
                throw args.Error; 
            }
        } 

        internal static object HtmlXappConverter(Stream stream, Uri baseUri, bool canUseTopLevelBrowser, bool sandboxExternalContent, bool allowAsync, bool isJournalNavigation, out XamlReader asyncObjectConverter)
        {
            asyncObjectConverter = null; 

            if (canUseTopLevelBrowser) 
            { 
                return null;
            } 

            if (SecurityHelper.AreStringTypesEqual(baseUri.Scheme, BaseUriHelper.PackAppBaseUri.Scheme))
            {
                baseUri = BaseUriHelper.ConvertPackUriToAbsoluteExternallyVisibleUri(baseUri); 
            }
 
            stream.Close(); 

            return new WebBrowser(baseUri); 
        }
    }
}

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

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