XpsS0ValidatingLoader.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Framework / System / Windows / Documents / XpsS0ValidatingLoader.cs / 1305600 / XpsS0ValidatingLoader.cs
                        
                        
                            #region Using directives 

using System;
using System.Collections;
using System.Collections.Generic; 
using System.Text;
using System.Windows.Markup; 
using System.Xml; 
using System.IO;
using System.IO.Packaging; 
using System.Xml.Schema;
using System.Net;
using System.Resources;
using System.Reflection; 
using System.Security;
 
using MS.Internal; 
using MS.Internal.IO.Packaging;
 
#endregion

namespace System.Windows.Documents
{ 
    internal class XpsValidatingLoader
    { 
        internal XpsValidatingLoader() 
        {
        } 

        internal object Load(Stream stream, Uri parentUri, ParserContext pc, ContentType mimeType)
        {
            return Load(stream, parentUri, pc, mimeType, null); 
        }
 
        internal void Validate(Stream stream, Uri parentUri, ParserContext pc, ContentType mimeType, string rootElement) 
        {
            Load(stream, parentUri, pc, mimeType, rootElement); 
        }

        /// 
        /// rootElement == null: Load elements, validation of root element will occur in caller by checking object type or casting 
        /// rootElement != null: Only perform validation, and expect rootElement at root of markup
        ///  
        ///  
        /// 
        ///  
        /// 
        /// 
        /// 
        ///  
        /// Critical: Accesses a package from PreloadedPackages
        /// SecurityTreatAsSafe: No package instance or package related objects are handed out from this 
        ///             method except as SecurityCriticalData (to XpsSchema.ValidateRelationships) 
        /// 
        [SecurityCritical, SecurityTreatAsSafe] 
        private object Load(Stream stream, Uri parentUri, ParserContext pc, ContentType mimeType, string rootElement)
        {
            object obj = null;
 
            if (!DocumentMode)
            {                       // Loose XAML, just check against schema, don't check content type 
                if (rootElement==null) 
                {
                    obj = XamlReader.Load(stream, pc); 
                }
            }
            else
            {                       // inside an XPS Document. Perform maximum validation 
                XpsSchema schema = XpsSchema.GetSchema(mimeType);
                Uri uri = pc.BaseUri; 
 
                // Using PackUriHelper.ValidateAndGetPackUriComponents internal method
                // to get Package and Part Uri in one step 
                Uri packageUri;
                Uri partUri;
                PackUriHelper.ValidateAndGetPackUriComponents(uri, out packageUri, out partUri);
 
                Package package = PreloadedPackages.GetPackage(packageUri);
 
                Uri parentPackageUri = null; 

                if (parentUri != null) 
                {
                    parentPackageUri = PackUriHelper.GetPackageUri(parentUri);
                    if (!parentPackageUri.Equals(packageUri))
                    { 
                        throw new FileFormatException(SR.Get(SRID.XpsValidatingLoaderUriNotInSamePackage));
                    } 
                } 

                schema.ValidateRelationships(new SecurityCriticalData(package), packageUri, partUri, mimeType); 

                if (schema.AllowsMultipleReferencesToSameUri(mimeType))
                {
                    _uniqueUriRef = null; 
                }
                else 
                { 
                    _uniqueUriRef = new Hashtable(11);
                } 

                Hashtable validResources = (_validResources.Count > 0 ? _validResources.Peek() : null);
                if (schema.HasRequiredResources(mimeType))
                { 
                    validResources = new Hashtable(11);
 
                    PackagePart part = package.GetPart(partUri); 
                    PackageRelationshipCollection requiredResources = part.GetRelationshipsByType(_requiredResourceRel);
 
                    foreach (PackageRelationship relationShip in requiredResources)
                    {
                        Uri targetUri = PackUriHelper.ResolvePartUri(partUri, relationShip.TargetUri);
                        Uri absTargetUri = PackUriHelper.Create(packageUri, targetUri); 

                        PackagePart targetPart = package.GetPart(targetUri); 
 
                        if (schema.IsValidRequiredResourceMimeType(targetPart.ValidatedContentType))
                        { 
                            if (!validResources.ContainsKey(absTargetUri))
                            {
                                validResources.Add(absTargetUri, true);
                            } 
                        }
                        else 
                        { 
                            if (!validResources.ContainsKey(absTargetUri))
                            { 
                                validResources.Add(absTargetUri, false);
                            }
                        }
                    } 
                }
 
                XpsSchemaValidator xpsSchemaValidator = new XpsSchemaValidator(this, schema, mimeType, 
                                                                                stream, packageUri, partUri);
                _validResources.Push(validResources); 
                if (rootElement != null)
                {
                    xpsSchemaValidator.XmlReader.MoveToContent();
 
                    if (!rootElement.Equals(xpsSchemaValidator.XmlReader.Name))
                    { 
                        throw new FileFormatException(SR.Get(SRID.XpsValidatingLoaderUnsupportedMimeType)); 
                    }
 
                    while (xpsSchemaValidator.XmlReader.Read())
                        ;
                }
                else 
                {
                    obj = XamlReader.Load(xpsSchemaValidator.XmlReader, 
                                    pc, 
                                    XamlParseMode.Synchronous);
                } 
                _validResources.Pop();
            }

            return obj; 
        }
 
 
        static internal bool DocumentMode
        { 
            get
            {
                return _documentMode;
            } 
        }
 
 
        static internal void AssertDocumentMode()
        {   // Once switched to document mode, we stay there 
            _documentMode = true;
        }

 
        internal void UriHitHandler(int node,Uri uri)
        { 
            if (_uniqueUriRef != null) 
            {
                if (_uniqueUriRef.Contains(uri)) 
                {
                    if ((int)_uniqueUriRef[uri] != node)
                    {
                        throw new FileFormatException(SR.Get(SRID.XpsValidatingLoaderDuplicateReference)); 
                    }
                } 
                else 
                {
                    _uniqueUriRef.Add(uri, node); 
                }
            }
            Hashtable validResources = _validResources.Peek();
            if (validResources!=null) 
            {
                if (!validResources.ContainsKey(uri)) 
                { 
                    // The hashtable is case sensitive, packuris are not, so if we do not find in hashtable,
                    // do true comparison and add when found for next time... 
                    bool found = false;
                    foreach (Uri resUri in validResources.Keys)
                    {
                        if (PackUriHelper.ComparePackUri(resUri,uri) == 0) 
                        {
                            validResources.Add(uri, validResources[resUri]); 
                            found = true; 
                            break;
                        } 
                    }

                    if (!found)
                    { 
                        throw new FileFormatException(SR.Get(SRID.XpsValidatingLoaderUnlistedResource));
                    } 
                } 
                if (!(bool)validResources[uri])
                { 
                    throw new FileFormatException(SR.Get(SRID.XpsValidatingLoaderUnsupportedMimeType));
                }
            }
        } 

        static private Stack _validResources = new Stack(); 
 
        private Hashtable _uniqueUriRef;
 
        static
        private
        bool _documentMode          = false;
 
        static
        private 
        string _requiredResourceRel = "http://schemas.microsoft.com/xps/2005/06/required-resource"; 

        static private XpsS0FixedPageSchema xpsS0FixedPageSchema = new XpsS0FixedPageSchema(); 
        static private XpsS0ResourceDictionarySchema xpsS0ResourceDictionarySchema = new XpsS0ResourceDictionarySchema();
        static private XpsDocStructSchema xpsDocStructSchema = new XpsDocStructSchema();
    }
} 

 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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XpsS0ValidatingLoader.cs source code in C# .NET

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