internal static void UpdateFragments(NavigationStack <TViewModel> navigationStack, AppCompatActivity appCompatActivity, List <IFragmentInnerStack> fragmentsToPop, List <IFragmentInnerStack> fragmentsToPush, IFragmentActivity fragmentActivity)
{
FragmentTransaction transaction = null;
var dialogFragmentToPush = fragmentsToPush?.Where(x => x is DialogFragmentInnerStack <TViewModel>).Cast <DialogFragmentInnerStack <TViewModel> >().ToList();
var normalFragmentToPush = fragmentsToPush?.Where(x => x is FragmentInnerStack <TViewModel>).ToList();
List <FragmentInnerStack <TViewModel> > fragmentListToPop = null;
if (fragmentsToPop != null)
{
foreach (IFragmentInnerStack fragmentStack in fragmentsToPop)
{
if (fragmentStack is DialogFragmentInnerStack <TViewModel> dialogFragmentInnerStack)
{
dialogFragmentInnerStack.Fragment.DismissAllowingStateLoss();
}
else if (fragmentStack is FragmentInnerStack <TViewModel> fragmentInnerStack)
{
if (fragmentListToPop is null)
{
fragmentListToPop = new List <FragmentInnerStack <TViewModel> >(fragmentsToPop.Count);
}
fragmentListToPop.Add(fragmentInnerStack);
}
}
if (fragmentListToPop != null)
{
transaction = appCompatActivity.SupportFragmentManager.BeginTransaction();
foreach (FragmentInnerStack <TViewModel> fragmentStack in fragmentListToPop)
{
transaction = transaction.Remove(fragmentStack.Fragment);
}
}
}
if (normalFragmentToPush != null && normalFragmentToPush.Count > 0 && fragmentActivity != null)
{
foreach (IFragmentInnerStack fragmentStack in normalFragmentToPush)
{
if (transaction is null)
{
transaction = appCompatActivity.SupportFragmentManager.BeginTransaction();
}
transaction.AddToBackStack(fragmentStack.FragmentTag);
transaction = transaction.Replace(fragmentActivity.FragmentContainerId, fragmentStack.Fragment, fragmentStack.FragmentTag);
}
}
else if (transaction != null)
{
ActivityInnerStack <TViewModel> activityTop;
if (dialogFragmentToPush != null && dialogFragmentToPush.Count > 0)
{
activityTop = navigationStack.FindFirstOfType <ActivityInnerStack <TViewModel> >();
}
else
{
activityTop = navigationStack.Top as ActivityInnerStack <TViewModel>;
}
if (activityTop != null && activityTop.FragmentStack.Count > 0 && activityTop.FragmentStack[activityTop.FragmentStack.Count - 1] is FragmentInnerStack <TViewModel> fragmentInnerStack)
{
transaction = transaction.Replace(fragmentActivity.FragmentContainerId, fragmentInnerStack.Fragment, fragmentInnerStack.FragmentTag);
}
}
transaction?.CommitAllowingStateLoss();
if (dialogFragmentToPush != null && dialogFragmentToPush.Count > 0)
{
foreach (DialogFragmentInnerStack <TViewModel> dialogFragment in dialogFragmentToPush)
{
dialogFragment.Fragment.Show(appCompatActivity.SupportFragmentManager, dialogFragment.FragmentTag);
}
}
}
public NavigationPresenter(IViewModelLocatorService <TViewModel> viewModelLocatorService)
{
_navigationStack = new NavigationStack <TViewModel>(viewModelLocatorService);
}
