public ObjectWriterContext(XamlSchemaContext schemaContext,
XamlObjectWriterSettings settings, XAML3.INameScope rootNameScope, XamlRuntime runtime)
: base(schemaContext)
{
_stack = new XamlContextStack <ObjectWriterFrame>(() => new ObjectWriterFrame());
XAML3.INameScopeDictionary rootNameScopeDictionary = null;
if (rootNameScope == null)
{
#if TARGETTING35SP1
rootNameScopeDictionary = new NameScopeDictionary(new NameScope());
#else
rootNameScopeDictionary = new NameScope();
#endif
}
else
{
rootNameScopeDictionary = rootNameScope as XAML3.INameScopeDictionary;
if (rootNameScopeDictionary == null)
{
rootNameScopeDictionary = new NameScopeDictionary(rootNameScope);
}
}
_stack.CurrentFrame.NameScopeDictionary = rootNameScopeDictionary;
_stack.PushScope(); // put a blank sentinal frame on the stack.
if (settings != null)
{
_settings = settings.StripDelegates();
}
_runtime = runtime;
_savedDepth = 0;
}
public ObjectWriterContext(XamlSavedContext savedContext,
XamlObjectWriterSettings settings, XAML3.INameScope rootNameScope, XamlRuntime runtime)
: base(savedContext.SchemaContext)
{
_stack = new XamlContextStack <ObjectWriterFrame>(savedContext.Stack, false);
if (settings != null)
{
_settings = settings.StripDelegates();
}
_runtime = runtime;
BaseUri = savedContext.BaseUri;
// If the bottom of the stack is a (no XamlType) Value (reparse) then back-up onto it.
// Otherwise add a blank frame to isolate template use from the saved context.
switch (savedContext.SaveContextType)
{
case SavedContextType.Template:
// Templates always need a root namescope, to isolate them from the rest of the doc
XAML3.INameScopeDictionary rootNameScopeDictionary = null;
if (rootNameScope == null)
{
#if TARGETTING35SP1
rootNameScopeDictionary = new NameScopeDictionary(new NameScope());
#else
rootNameScopeDictionary = new NameScope();
#endif
}
else
{
rootNameScopeDictionary = rootNameScope as XAML3.INameScopeDictionary;
if (rootNameScopeDictionary == null)
{
rootNameScopeDictionary = new NameScopeDictionary(rootNameScope);
}
}
// Push an extra frame to ensure that the template NameScope is
// not part of the saved context. Otherwise, the namescope
// will hold things alive as long as the template is alive
_stack.PushScope();
_savedDepth = _stack.Depth;
_stack.CurrentFrame.NameScopeDictionary = rootNameScopeDictionary;
_stack.PushScope();
break;
case SavedContextType.ReparseValue:
case SavedContextType.ReparseMarkupExtension:
Debug.Assert(rootNameScope == null, "Cannot pass a new namescope in to a reparse context");
_savedDepth = _stack.Depth - 1;
break;
}
}
private XAML3.INameScopeDictionary HuntAroundForARootNameScope(ObjectWriterFrame rootFrame)
{
Debug.Assert(rootFrame.Depth == 1);
object inst = rootFrame.Instance;
if (inst == null && rootFrame.XamlType.IsNameScope)
{
throw new InvalidOperationException(SR.Get(SRID.NameScopeOnRootInstance));
}
XAML3.INameScopeDictionary nameScopeDictionary = null;
nameScopeDictionary = inst as XAML3.INameScopeDictionary;
if (nameScopeDictionary == null)
{
XAML3.INameScope nameScope = inst as XAML3.INameScope;
if (nameScope != null)
{
nameScopeDictionary = new NameScopeDictionary(nameScope);
}
}
// If the root instance isn't a name scope
// then perhaps it designated a property as the name scope.
if (nameScopeDictionary == null)
{
XamlType xamlType = rootFrame.XamlType;
if (xamlType.UnderlyingType != null)
{
// Get the Name Scope Property (from attribute on the class)
XamlMember nameScopeProperty = TypeReflector.LookupNameScopeProperty(xamlType);
if (nameScopeProperty != null)
{
// Read the value of the property. If it is an object we are good.
// if it is null create a stock name scope dictionary object and assign it back.
XAML3.INameScope nameScope = (XAML3.INameScope)_runtime.GetValue(inst, nameScopeProperty, false);
if (nameScope == null)
{
#if TARGETTING35SP1
nameScopeDictionary = new NameScopeDictionary(new NameScope());
#else
nameScopeDictionary = new NameScope();
#endif
_runtime.SetValue(inst, nameScopeProperty, nameScopeDictionary);
}
else
{
nameScopeDictionary = nameScope as XAML3.INameScopeDictionary;
if (nameScopeDictionary == null)
{
nameScopeDictionary = new NameScopeDictionary(nameScope);
}
}
}
}
}
if (nameScopeDictionary == null && _settings != null &&
_settings.RegisterNamesOnExternalNamescope)
{
ObjectWriterFrame frameZero = (ObjectWriterFrame)rootFrame.Previous;
nameScopeDictionary = frameZero.NameScopeDictionary;
}
// Otherwise we still need a namescope at the root of the parse
// for our own usage. For IXamlNameResolver() to use.
if (nameScopeDictionary == null)
{
#if TARGETTING35SP1
nameScopeDictionary = new NameScopeDictionary(new NameScope());
#else
nameScopeDictionary = new NameScope();
#endif
}
rootFrame.NameScopeDictionary = nameScopeDictionary;
return(nameScopeDictionary);
}