internal static LaunchResult SafeLaunchBrowserOnlyIfPossible(Uri originatingUri, Uri destinationUri, string targetName, bool fIsTopLevel)
{
LaunchResult launchResult = LaunchResult.NotLaunched;
bool flag = destinationUri.Scheme == Uri.UriSchemeHttp || destinationUri.Scheme == Uri.UriSchemeHttps || destinationUri.IsFile;
bool flag2 = string.Compare(destinationUri.Scheme, Uri.UriSchemeMailto, StringComparison.OrdinalIgnoreCase) == 0;
if (!BrowserInteropHelper.IsInitialViewerNavigation && SecurityHelper.CallerHasUserInitiatedNavigationPermission() && ((fIsTopLevel && flag) || flag2))
{
if (flag)
{
IBrowserCallbackServices browserCallbackServices = (Application.Current != null) ? Application.Current.BrowserCallbackServices : null;
if (browserCallbackServices != null)
{
launchResult = AppSecurityManager.CanNavigateToUrlWithZoneCheck(originatingUri, destinationUri);
if (launchResult == LaunchResult.Launched)
{
browserCallbackServices.DelegateNavigation(BindUriHelper.UriToString(destinationUri), targetName, AppSecurityManager.GetHeaders(destinationUri));
launchResult = LaunchResult.Launched;
}
}
}
else if (flag2)
{
UnsafeNativeMethods.ShellExecute(new HandleRef(null, IntPtr.Zero), null, BindUriHelper.UriToString(destinationUri), null, null, 0);
launchResult = LaunchResult.Launched;
}
}
return(launchResult);
}
