internal DeferrableContent(Stream stream, Baml2006SchemaContext schemaContext,
IXamlObjectWriterFactory objectWriterFactory, IServiceProvider serviceProvider,
object rootObject)
{
ObjectWriterParentSettings = objectWriterFactory.GetParentSettings();
if (ObjectWriterParentSettings.AccessLevel != null)
{
XamlLoadPermission loadPermission =
new XamlLoadPermission(ObjectWriterParentSettings.AccessLevel);
loadPermission.Demand();
this.LoadPermission = loadPermission;
}
bool assemblyTargetsFramework2 = false;
// The local assembly can be null if it is not specified in the XamlReaderSettings.
if (schemaContext.LocalAssembly != null)
{
assemblyTargetsFramework2 = schemaContext.LocalAssembly.ImageRuntimeVersion.StartsWith("v2", StringComparison.Ordinal);
}
// There is an incompatibility between the framework versions 3 and 4 regarding MarkupExtension resources.
// In version 3, MarkupExtension resources did not provide values when looked up.
// In version 4, they do.
if (assemblyTargetsFramework2)
{
ObjectWriterParentSettings.SkipProvideValueOnRoot = true;
}
this.Stream = stream;
this.SchemaContext = schemaContext;
this.ObjectWriterFactory = objectWriterFactory;
this.ServiceProvider = serviceProvider;
this.RootObject = rootObject;
}
public override bool IsSubsetOf(IPermission target)
{
if (target == null)
{
bool isEmpty = !IsUnrestricted() && AllowedAccess.Count == 0;
return(isEmpty);
}
XamlLoadPermission other = CastPermission(target, "target");
if (other.IsUnrestricted())
{
return(true);
}
if (this.IsUnrestricted())
{
return(false);
}
foreach (XamlAccessLevel accessLevel in this.AllowedAccess)
{
if (!other.Includes(accessLevel))
{
return(false);
}
}
return(true);
}
public override IPermission Union(IPermission other)
{
if (other == null)
{
return(this.Copy());
}
XamlLoadPermission permission = CastPermission(other, "other");
if (this.IsUnrestricted() || permission.IsUnrestricted())
{
return(new XamlLoadPermission(PermissionState.Unrestricted));
}
List <XamlAccessLevel> allowedAccess = new List <XamlAccessLevel>(this.AllowedAccess);
foreach (XamlAccessLevel level in permission.AllowedAccess)
{
if (!this.Includes(level))
{
allowedAccess.Add(level);
if (level.PrivateAccessToTypeName != null)
{
for (int i = 0; i < allowedAccess.Count; i++)
{
if ((allowedAccess[i].PrivateAccessToTypeName == null) && (allowedAccess[i].AssemblyNameString == level.AssemblyNameString))
{
allowedAccess.RemoveAt(i);
break;
}
}
}
}
}
return(new XamlLoadPermission(allowedAccess));
}
public override IPermission Intersect(IPermission target)
{
if (target == null)
{
return(null);
}
XamlLoadPermission permission = CastPermission(target, "target");
if (permission.IsUnrestricted())
{
return(this.Copy());
}
if (this.IsUnrestricted())
{
return(permission.Copy());
}
List <XamlAccessLevel> allowedAccess = new List <XamlAccessLevel>();
foreach (XamlAccessLevel level in this.AllowedAccess)
{
if (permission.Includes(level))
{
allowedAccess.Add(level);
}
else if (level.PrivateAccessToTypeName != null)
{
XamlAccessLevel requestedAccess = level.AssemblyOnly();
if (permission.Includes(requestedAccess))
{
allowedAccess.Add(requestedAccess);
}
}
}
return(new XamlLoadPermission(allowedAccess));
}
private static XamlLoadPermission CastPermission(IPermission other, string argName)
{
XamlLoadPermission result = other as XamlLoadPermission;
if (result == null)
{
throw new ArgumentException(SR.Get(SRID.ExpectedLoadPermission), argName);
}
return(result);
}
private static XamlLoadPermission CastPermission(IPermission other, string argName)
{
XamlLoadPermission permission = other as XamlLoadPermission;
if (permission == null)
{
throw new ArgumentException(System.Xaml.SR.Get("ExpectedLoadPermission"), argName);
}
return(permission);
}
public override IPermission Intersect(IPermission target)
{
if (target == null)
{
return(null);
}
XamlLoadPermission other = CastPermission(target, "target");
if (other.IsUnrestricted())
{
return(this.Copy());
}
if (this.IsUnrestricted())
{
return(other.Copy());
}
List <XamlAccessLevel> result = new List <XamlAccessLevel>();
// We could optimize this with a hash, but we don't expect people to be creating
// large unions of access levels.
foreach (XamlAccessLevel accessLevel in this.AllowedAccess)
{
// First try the full access level
if (other.Includes(accessLevel))
{
result.Add(accessLevel);
}
// Then try the assembly subset
else if (accessLevel.PrivateAccessToTypeName != null)
{
XamlAccessLevel assemblyAccess = accessLevel.AssemblyOnly();
if (other.Includes(assemblyAccess))
{
result.Add(assemblyAccess);
}
}
}
return(new XamlLoadPermission(result));
}
public override IPermission Union(IPermission other)
{
if (other == null)
{
return(this.Copy());
}
XamlLoadPermission xamlOther = CastPermission(other, "other");
if (IsUnrestricted() || xamlOther.IsUnrestricted())
{
return(new XamlLoadPermission(PermissionState.Unrestricted));
}
List <XamlAccessLevel> mergedAccess = new List <XamlAccessLevel>(this.AllowedAccess);
foreach (XamlAccessLevel accessLevel in xamlOther.AllowedAccess)
{
if (!this.Includes(accessLevel))
{
mergedAccess.Add(accessLevel);
if (accessLevel.PrivateAccessToTypeName != null)
{
// If we have an entry for access to just the assembly of this type, it is now redundant
for (int i = 0; i < mergedAccess.Count; i++)
{
if (mergedAccess[i].PrivateAccessToTypeName == null &&
mergedAccess[i].AssemblyNameString == accessLevel.AssemblyNameString)
{
mergedAccess.RemoveAt(i);
break;
}
}
}
}
}
return(new XamlLoadPermission(mergedAccess));
}
public override bool IsSubsetOf(IPermission target)
{
if (target == null)
{
return(!this.IsUnrestricted() && (this.AllowedAccess.Count == 0));
}
XamlLoadPermission permission = CastPermission(target, "target");
if (!permission.IsUnrestricted())
{
if (this.IsUnrestricted())
{
return(false);
}
foreach (XamlAccessLevel level in this.AllowedAccess)
{
if (!permission.Includes(level))
{
return(false);
}
}
}
return(true);
}
private ResourceDictionary LoadDictionary(Assembly assembly, string assemblyName, string resourceName, bool isTraceEnabled)
{
ResourceDictionary dictionary = null;
// Create the resource manager that will load the byte array
ResourceManager rm = new ResourceManager(assemblyName + ".g", assembly);
resourceName = resourceName + ".baml";
// Load the resource stream
Stream stream = null;
try
{
stream = rm.GetStream(resourceName, CultureInfo.CurrentUICulture);
}
// There is no ResourceManager.HasManifest in order to detect this case before an exception is thrown.
// Likewise, there is no way to know if loading a resource will fail prior to loading it.
// So, the exceptions must be caught. stream will continue to be null and handled accordingly later.
#pragma warning disable 6502
catch (MissingManifestResourceException)
{
// No usable resources in the assembly
}
#if !DEBUG
catch (InvalidOperationException)
{
// Object not stored correctly
}
#endif
#pragma warning restore 6502
if (stream != null)
{
Baml2006ReaderSettings settings = new Baml2006ReaderSettings();
settings.OwnsStream = true;
settings.LocalAssembly = assembly;
Baml2006Reader bamlReader = new Baml2006Reader(stream, new Baml2006SchemaContext(settings.LocalAssembly), settings);
System.Xaml.XamlObjectWriterSettings owSettings = XamlReader.CreateObjectWriterSettingsForBaml();
if (assembly != null)
{
owSettings.AccessLevel = XamlAccessLevel.AssemblyAccessTo(assembly);
}
System.Xaml.XamlObjectWriter writer = new System.Xaml.XamlObjectWriter(bamlReader.SchemaContext, owSettings);
if (owSettings.AccessLevel != null)
{
XamlLoadPermission loadPermission = new XamlLoadPermission(owSettings.AccessLevel);
loadPermission.Assert();
try
{
System.Xaml.XamlServices.Transform(bamlReader, writer);
}
finally
{
CodeAccessPermission.RevertAssert();
}
}
else
{
System.Xaml.XamlServices.Transform(bamlReader, writer);
}
dictionary = (ResourceDictionary)writer.Result;
if (isTraceEnabled && (dictionary != null))
{
EventTrace.EventProvider.TraceEvent(EventTrace.Event.WClientResourceBamlAssembly,
EventTrace.Keyword.KeywordXamlBaml, EventTrace.Level.Verbose,
assemblyName);
}
}
return dictionary;
}
// copy ctor. We can reuse the list of the existing instance, because it is a
// ReadOnlyCollection over a privately created array, hence is never mutated,
// even if the other instance is mutated via FromXml().
private XamlLoadPermission(XamlLoadPermission other)
{
_isUnrestricted = other._isUnrestricted;
this.AllowedAccess = other.AllowedAccess;
}
//[CodeAnalysis("AptcaMethodsShouldOnlyCallAptcaMethods")] //Tracking Bug: 29647
internal static object LoadBaml(
Stream stream,
ParserContext parserContext,
object parent,
bool closeStream)
{
object root = null;
#if DEBUG_CLR_MEM
bool clrTracingEnabled = false;
// Use local pass variable to correctly log nested parses.
int pass = 0;
if (CLRProfilerControl.ProcessIsUnderCLRProfiler &&
(CLRProfilerControl.CLRLoggingLevel >= CLRProfilerControl.CLRLogState.Performance))
{
clrTracingEnabled = true;
pass = ++_CLRBamlPass;
CLRProfilerControl.CLRLogWriteLine("Begin_BamlParse_{0}", pass);
}
#endif // DEBUG_CLR_MEM
EventTrace.EasyTraceEvent(EventTrace.Keyword.KeywordXamlBaml | EventTrace.Keyword.KeywordPerf, EventTrace.Event.WClientParseBamlBegin, parserContext.BaseUri);
if (TraceMarkup.IsEnabled)
{
TraceMarkup.Trace(TraceEventType.Start, TraceMarkup.Load);
}
try
{
//
// If the stream contains info about the Assembly that created it,
// set StreamCreatedAssembly from the stream instance.
//
IStreamInfo streamInfo = stream as IStreamInfo;
if (streamInfo != null)
{
parserContext.StreamCreatedAssembly = streamInfo.Assembly;
}
Baml2006ReaderSettings readerSettings = XamlReader.CreateBamlReaderSettings();
readerSettings.BaseUri = parserContext.BaseUri;
readerSettings.LocalAssembly = streamInfo.Assembly;
// We do not set OwnsStream = true so the Baml2006Reader will not close the stream.
// Calling code is responsible for disposing the stream
if (readerSettings.BaseUri == null || String.IsNullOrEmpty(readerSettings.BaseUri.ToString()))
{
readerSettings.BaseUri = BaseUriHelper.PackAppBaseUri;
}
var reader = new Baml2006Reader(stream, new Baml2006SchemaContext(readerSettings.LocalAssembly), readerSettings, parent);
// We don't actually use the GeneratedInternalTypeHelper any more.
// But for v3 compat, don't allow loading of internals in PT unless there is one.
Type internalTypeHelper = null;
if (streamInfo.Assembly != null)
{
try
{
internalTypeHelper = XamlTypeMapper.GetInternalTypeHelperTypeFromAssembly(parserContext);
}
// This can perform attribute reflection which will fail if the assembly has unresolvable
// attributes. If that happens, just assume there is no helper.
catch (Exception e)
{
if (MS.Internal.CriticalExceptions.IsCriticalException(e))
{
throw;
}
}
}
if (internalTypeHelper != null)
{
XamlAccessLevel accessLevel = XamlAccessLevel.AssemblyAccessTo(streamInfo.Assembly);
XamlLoadPermission loadPermission = new XamlLoadPermission(accessLevel);
loadPermission.Assert();
try
{
root = WpfXamlLoader.LoadBaml(reader, parserContext.SkipJournaledProperties, parent, accessLevel, parserContext.BaseUri);
}
finally
{
CodeAccessPermission.RevertAssert();
}
}
else
{
root = WpfXamlLoader.LoadBaml(reader, parserContext.SkipJournaledProperties, parent, null, parserContext.BaseUri);
}
DependencyObject dObject = root as DependencyObject;
if (dObject != null)
{
dObject.SetValue(BaseUriHelper.BaseUriProperty, readerSettings.BaseUri);
}
Application app = root as Application;
if (app != null)
{
app.ApplicationMarkupBaseUri = GetBaseUri(readerSettings.BaseUri);
}
Debug.Assert(parent == null || root == parent);
}
finally
{
if (TraceMarkup.IsEnabled)
{
TraceMarkup.Trace(TraceEventType.Stop, TraceMarkup.Load, root);
}
EventTrace.EasyTraceEvent(EventTrace.Keyword.KeywordXamlBaml | EventTrace.Keyword.KeywordPerf, EventTrace.Event.WClientParseBamlEnd, parserContext.BaseUri);
if (closeStream && stream != null)
{
stream.Close();
}
#if DEBUG_CLR_MEM
if (clrTracingEnabled && (CLRProfilerControl.CLRLoggingLevel >= CLRProfilerControl.CLRLogState.Performance))
{
CLRProfilerControl.CLRLogWriteLine("End_BamlParse_{0}", pass);
}
#endif // DEBUG_CLR_MEM
}
return (root);
}
private XamlLoadPermission(XamlLoadPermission other)
{
this._isUnrestricted = other._isUnrestricted;
this.AllowedAccess = other.AllowedAccess;
}