private static LaunchResult CanNavigateToUrlWithZoneCheck(Uri originatingUri, Uri destinationUri)
{
AppSecurityManager.EnsureSecurityManager();
bool flag = UnsafeNativeMethods.CoInternetIsFeatureEnabled(1, 2) != 1;
int num = AppSecurityManager.MapUrlToZone(destinationUri);
Uri uri = null;
if (Application.Current.MimeType != MimeType.Document)
{
uri = BrowserInteropHelper.Source;
}
else if (destinationUri.IsFile && Path.GetExtension(destinationUri.LocalPath).Equals(DocumentStream.XpsFileExtension, StringComparison.OrdinalIgnoreCase))
{
num = 3;
}
int num2;
if (uri != null)
{
num2 = AppSecurityManager.MapUrlToZone(uri);
}
else
{
bool flag2 = SecurityHelper.CheckUnmanagedCodePermission();
if (flag2)
{
return(LaunchResult.Launched);
}
num2 = 3;
uri = originatingUri;
}
if ((!flag && ((num2 != 3 && num2 != 4) || num != 0)) || (flag && (num2 == num || (num2 <= 4 && num <= 4 && (num2 < num || ((num2 == 2 || num2 == 1) && (num == 2 || num == 1)))))))
{
return(LaunchResult.Launched);
}
return(AppSecurityManager.CheckBlockNavigation(uri, destinationUri, flag));
}
