private List <PushOperation> Push(List <PushInformation <TViewModel> > pushInformations)
{
List <PushOperation> pushOperations = new List <PushOperation>();
InnerStack <TViewModel> top = null;
if (_innerStacks.Count > 0)
{
top = _innerStacks[_innerStacks.Count - 1];
}
foreach (var pushInformation in pushInformations)
{
if (pushInformation.Factory is ActivityViewFactory activityViewFactory)
{
var activityInnerStack = new ActivityInnerStack <TViewModel>(this, activityViewFactory.ActivityType, activityIsOnlyAFragmentContainer: false, shouldClearHistory: activityViewFactory.ShouldClearHistory);
pushOperations.Add(new ActivityPushOperation <TViewModel>(activityInnerStack, pushInformation.Instance.ViewModelInstance));
top = activityInnerStack;
_innerStacks.Add(top);
}
else if (pushInformation.Factory is DialogFragmentViewFactory dialogFragmentViewFactory)
{
var host = top.GetActivityInnerStack();
if (host == null)
{
//need to push the activity first
var activityInnerStack = new ActivityInnerStack <TViewModel>(this, dialogFragmentViewFactory.HostActivityType, activityIsOnlyAFragmentContainer: true, shouldClearHistory: dialogFragmentViewFactory.ShouldClearHistory);
pushOperations.Add(new ActivityPushOperation <TViewModel>(activityInnerStack, viewModel: null));
top = host = activityInnerStack;
_innerStacks.Add(top);
}
var fragment = dialogFragmentViewFactory.Creator();
//we set screeninformation to the fragment can retrieve its viewmodel
if (fragment is IScreenView screenView)
{
screenView.ScreenRoute = pushInformation.Instance.ToString();
_viewModelLocatorService.AddViewModel(pushInformation.Instance.ToString(), pushInformation.Instance.ViewModelInstance);
}
var dialogFragmentInnerStack = new DialogFragmentInnerStack <TViewModel>(this, host, fragment);
pushOperations.Add(new FragmentPushOperation <TViewModel>(host)
{
FragmentStacksToPush =
{
dialogFragmentInnerStack
}
});
top = dialogFragmentInnerStack;
_innerStacks.Add(top);
}
else if (pushInformation.Factory is FragmentViewFactory fragmentViewFactory)
{
var activityHost = top.GetActivityInnerStack();
if (activityHost == null)
{
//need to push the activity first
var activityInnerStack = new ActivityInnerStack <TViewModel>(this, fragmentViewFactory.HostActivityType, activityIsOnlyAFragmentContainer: true, shouldClearHistory: fragmentViewFactory.ShouldClearHistory);
pushOperations.Add(new ActivityPushOperation <TViewModel>(activityInnerStack, viewModel: null));
top = activityHost = activityInnerStack;
_innerStacks.Add(top);
}
var fragment = fragmentViewFactory.Creator();
//we set screeninformation to the fragment can retrieve its viewmodel
if (fragment is IScreenView screenView)
{
screenView.ScreenRoute = pushInformation.Instance.ToString();
_viewModelLocatorService.AddViewModel(pushInformation.Instance.ToString(), pushInformation.Instance.ViewModelInstance);
}
var fragmentInnerStack = new FragmentInnerStack <TViewModel>(this, activityHost, fragment);
pushOperations.Add(new FragmentPushOperation <TViewModel>(activityHost)
{
FragmentStacksToPush =
{
fragmentInnerStack
}
});
activityHost.FragmentStack.Add(fragmentInnerStack);
}
else
{
throw new InvalidOperationException("This kind of factory is not supported...");
}
}
//simplify list of pop operations
int insertIndex = 0;
for (int i = 1; i < pushOperations.Count; i++)
{
if (TryMerge(pushOperations[insertIndex], pushOperations[i], out PushOperation op))
{
pushOperations[insertIndex] = op;
}
else
{
insertIndex++;
if (insertIndex != i)
{
pushOperations[insertIndex] = pushOperations[i];
}
}
}
if (insertIndex < pushOperations.Count - 1)
{
int firstIndexToRemove = insertIndex + 1;
pushOperations.RemoveRange(firstIndexToRemove, pushOperations.Count - firstIndexToRemove);
}
return(pushOperations);
}
public MergedFragmentPopPushOperation(ActivityInnerStack <TViewModel> hostStack, List <IFragmentInnerStack> fragmentStacksToPop, List <IFragmentInnerStack> fragmentStacksToPush)
{
HostStack = hostStack;
FragmentStacksToPop = fragmentStacksToPop;
FragmentStacksToPush = fragmentStacksToPush;
}
public FragmentPopOperation(ActivityInnerStack <TViewModel> hostStack)
{
HostStack = hostStack;
}
public ActivityPushOperation(ActivityInnerStack <TViewModel> activityStack, IViewModel viewModel)
{
ActivityStack = activityStack;
ViewModel = viewModel;
}
public ActivityPopOperation(ActivityInnerStack <TViewModel> activityStack)
{
ActivityStack = activityStack;
}
