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. 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