public override PopOperation AsSpecificPopOperation(InnerStack <TViewModel> child)
{
if (child is FragmentInnerStack <TViewModel> fragmentInnerStack)
{
FragmentStack.RemoveAt(FragmentStack.Count - 1);
return(new FragmentPopOperation <TViewModel>(this)
{
FragmentStacksToPop =
{
fragmentInnerStack
}
});
}
throw new InvalidOperationException("Specific pop operation on unsupported child type");
}
public override PopOperation AsSpecificPopOperation(InnerStack <TViewModel> child)
{
throw new InvalidOperationException("Operation not supported, fragment can not have children");
}
internal static ActivityInnerStack <TViewModel> GetActivityInnerStack <TViewModel>(this InnerStack <TViewModel> item) where TViewModel : IViewModel
{
switch (item)
{
case null:
return(null);
case ActivityInnerStack <TViewModel> res:
return(res);
case DialogFragmentInnerStack <TViewModel> dialogFragmentInnerStack:
return(dialogFragmentInnerStack.FragmentHost);
case FragmentInnerStack <TViewModel> fragmentInnerStack:
return(fragmentInnerStack.FragmentHost);
default:
throw new InvalidOperationException($"Unsupported inner stack type : {item.GetType().Name}");
}
}
public abstract PopOperation AsSpecificPopOperation(InnerStack <TViewModel> child);