/// <summary>
/// This method calculates the attach rules defined on
/// this dependency property. It always returns a valid
/// AttachInfo, but the fields in AttachInfo may be null.
/// </summary>
internal static AttachInfo GetAttachInfo(DependencyProperty dp)
{
// Have we already seen this DP?
AttachInfo info = (AttachInfo)_attachInfoMap[dp];
if (info == null)
{
info = new AttachInfo(dp);
lock (_attachInfoMap)
{
_attachInfoMap[dp] = info;
}
}
return(info);
}
//------------------------------------------------------
//
// Private Methods
//
//------------------------------------------------------
#region Private Methods
/// <summary>
/// This method determines if the given property can be attached
/// to the given instance.
/// </summary>
private bool CanAttachProperty(DependencyProperty dp, DependencyObject instance)
{
AttachInfo info = DependencyObjectProvider.GetAttachInfo(dp);
return(info.CanAttach(instance));
}
/// <summary>
/// This method calculates the attach rules defined on
/// this dependency property. It always returns a valid
/// AttachInfo, but the fields in AttachInfo may be null.
/// </summary>
internal static AttachInfo GetAttachInfo(DependencyProperty dp)
{
// Have we already seen this DP?
AttachInfo info = (AttachInfo)_attachInfoMap[dp];
if (info == null)
{
info = new AttachInfo(dp);
lock(_attachInfoMap)
{
_attachInfoMap[dp] = info;
}
}
return info;
}
