[FriendAccessAllowed] // Built into Core, also used by Framework.
internal static void ProvideContextForObject(
DependencyObject context,
DependencyObject newValue )
{
if (context != null)
{
context.ProvideSelfAsInheritanceContext(newValue, null);
}
}
// add inheritance context to a value
private void AddInheritanceContext(DependencyObject inheritanceContext, object value)
{
// The VisualBrush.Visual property is the "friendliest", i.e. the
// most likely to be accepted by the resource as FEs need to accept
// being rooted by a VisualBrush.
//
// NOTE: Freezable.Debug_VerifyContextIsValid() contains a special
// case to allow this with the VisualBrush.Visual property.
// Changes made here will require updates in Freezable.cs
if (inheritanceContext.ProvideSelfAsInheritanceContext(value, VisualBrush.VisualProperty))
{
// if the assignment was successful, seal the value's InheritanceContext.
// This makes sure the resource always gets inheritance-related information
// from its point of definition, not from its point of use.
DependencyObject doValue = value as DependencyObject;
if (doValue != null)
{
doValue.IsInheritanceContextSealed = true;
}
}
}
