public override void Execute(CallbackActionWaiter callbackActionWaiter, bool animated)
{
UINavigationController navigationController = (UINavigationController)HostStack.Host;
if (Controllers.Count == 1)
{
navigationController.PushViewController(Controllers[0].AsViewController(), animated);
}
else
{
UIViewController[] vcs = navigationController.ViewControllers;
UIViewController[] newVcs = new UIViewController[vcs.Length + Controllers.Count];
for (int i = 0; i < vcs.Length; i++)
{
newVcs[i] = vcs[i];
}
for (int i = 0, j = vcs.Length; j < newVcs.Length; ++i, ++j)
{
newVcs[j] = Controllers[i].AsViewController();
}
navigationController.SetViewControllers(newVcs, animated);
}
}
public override void Execute(CallbackActionWaiter callbackActionWaiter, bool animated)
{
UIViewController host = Controller.Host;
var vc = Controller.AsViewController();
callbackActionWaiter.WaitOne();
host.PresentViewController(vc, animated, callbackActionWaiter.ReleaseOne);
}
public async Task UpdateNavigation(NavigationOperation <TViewModel> navigationOperation, INavigationInProgress navigationInProgress)
{
if (navigationOperation.Pushes.Count == 0 && navigationOperation.Pops.Count == 0)
{
return;
}
var controllersToPush = navigationOperation.Pushes.Select(x => new PushInformation <TViewModel>(_factoryAssociation[x.Screen], x.Instance));
foreach (var push in navigationOperation.Pushes)
{
await push.Instance.GetViewModel(""); //TODO: add route here
}
if (navigationInProgress.IsCancelled)
{
Task.Run(async() =>
{
// we wait 10s just in case, shouldn't put too much memory pressure on GC
await Task.Delay(10_000);
foreach (var push in navigationOperation.Pushes)
{
push.Instance.ViewModelInstance?.SafeDispose();
}
}).ConfigureAwait(false);
return;
}
navigationInProgress.Commit();
UIApplication.SharedApplication.InvokeOnMainThread(() =>
{
var callbackActionWaiter = new CallbackActionWaiter();
callbackActionWaiter.WaitOne();
_navigationStack.EnsureInitialized(_navigationController);
_navigationStack.ApplyActions(navigationOperation.Pops.Count, controllersToPush, callbackActionWaiter);
// lines below could be commented if we encounter issues with viewmodel disposing
callbackActionWaiter.Add(() =>
{
foreach (PopAction <TViewModel> pop in navigationOperation.Pops)
{
pop.Instance.ViewModelInstance?.DispatchSafeDispose();
}
});
Task.Run(async() =>
{
// we wait 10s to let the time for navigation controller animations before disposing content
await Task.Delay(10_000);
UIApplication.SharedApplication.InvokeOnMainThread(callbackActionWaiter.ReleaseOne);
});
});
}
public override void Execute(CallbackActionWaiter callbackActionWaiter, bool animated)
{
var navigationController = (UINavigationController)Pop.HostStack.Host;
var vcs = navigationController.ViewControllers;
UIViewController[] newVcs;
var controllersToDispose = new List <UIViewController>(Pop.CountToPop);
int newCount = vcs.Length - Pop.CountToPop + Push.Controllers.Count;
if (vcs.Length == newCount)
{
newVcs = vcs;
for (int j = vcs.Length - Pop.CountToPop; j < vcs.Length; ++j)
{
controllersToDispose.Add(newVcs[j]);
}
}
else
{
newVcs = new UIViewController[vcs.Length - Pop.CountToPop + Push.Controllers.Count];
int copyCount = vcs.Length - Pop.CountToPop;
for (int i = 0; i < copyCount; ++i)
{
newVcs[i] = vcs[i];
}
for (int j = copyCount; j < vcs.Length; ++j)
{
controllersToDispose.Add(vcs[j]);
}
}
for (int i = 0, j = vcs.Length - Pop.CountToPop; j < newVcs.Length; ++i, ++j)
{
newVcs[j] = Push.Controllers[i].AsViewController();
}
navigationController.SetViewControllers(newVcs, animated);
callbackActionWaiter.Add(() =>
{
foreach (UIViewController controller in controllersToDispose)
{
controller.SafeDispose();
}
});
}
public override void Execute(CallbackActionWaiter callbackActionWaiter, bool animated)
{
if (HostStack.Modal is NavigationControllerInnerStack navigationControllerInnerStack)
{
callbackActionWaiter.WaitOne();
navigationControllerInnerStack.Host.DismissViewController(animated, callbackActionWaiter.ReleaseOne);
callbackActionWaiter.Add(() => navigationControllerInnerStack.Host.SafeDispose());
}
else if (HostStack.Modal is SimpleControllerInnerStack simpleControllerInnerStack)
{
callbackActionWaiter.WaitOne();
simpleControllerInnerStack.Controller.DismissViewController(animated, callbackActionWaiter.ReleaseOne);
callbackActionWaiter.Add(() => simpleControllerInnerStack.Controller.SafeDispose());
}
else
{
throw new NotSupportedException($"Unsupported type of {HostStack.Modal.GetType().Name}");
}
}
public override void Execute(CallbackActionWaiter callbackActionWaiter, bool animated)
{
UINavigationController navigationController = (UINavigationController)HostStack.Host;
List <UIViewController> vcs = navigationController.ViewControllers.ToList();
if (CountToPop == 1)
{
UIViewController poppedViewController = vcs[vcs.Count - 1];
callbackActionWaiter.Add(() => poppedViewController.SafeDispose());
navigationController.PopViewController(animated);
}
else
{
int popToIndex = vcs.Count - 1 - CountToPop;
navigationController.PopToViewController(vcs[popToIndex], animated);
callbackActionWaiter.Add(() =>
{
for (int i = popToIndex + 1; i < vcs.Count; ++i)
{
vcs[i].SafeDispose();
}
});
}
}
public void ApplyActions(int popsCount, IEnumerable <PushInformation <TViewModel> > pushesCount, CallbackActionWaiter callbackActionWaiter)
{
var pops = Pop(popsCount);
var pushes = Push(pushesCount);
MergedPopPushOperation mergedOp = null;
if (pops.Count > 0 && pushes.Count > 0 && TryMerge(pops[pops.Count - 1], pushes[0], out mergedOp))
{
pops.RemoveAt(pops.Count - 1);
pushes.RemoveAt(0);
}
int popAnimatedIndex = mergedOp is null && pushes.Count == 0 ? pops.Count - 1 : -1;
bool mergedAnimated = pushes.Count == 0;
int pushAnimatedIndex = pushes.Count - 1;
for (var index = 0; index < pops.Count; index++)
{
pops[index].Execute(callbackActionWaiter, popAnimatedIndex == index);
}
mergedOp?.Execute(callbackActionWaiter, mergedAnimated);
for (var index = 0; index < pushes.Count; index++)
{
pushes[index].Execute(callbackActionWaiter, pushAnimatedIndex == index);
}
Console.WriteLine("apply actions");
}
public abstract void Execute(CallbackActionWaiter callbackActionWaiter, bool animated);