private static void AddToBackStack(BaseView view)
{
//remove if presented
while (BackStack.Remove(view))
{
;
}
//add to end
if (BackStack.Count == 0)
{
BackStack.AddLast(view);
return;
}
//find by priority
var node = BackStack.Last;
while (node != null && node.Value.BackPrority > view.BackPrority)
{
node = node.Previous;
}
if (node == null)
{
BackStack.AddFirst(view);
return;
}
else
{
BackStack.AddAfter(node, view);
}
}
private static void CloseNoAnimation(BaseView view)
{
if (view.VisibleState != VisibleState.Closed)
{
//close children
foreach (var child in view.OpenedChildren.ToArray())
{
CloseNoAnimation(child);
}
//remove from back stack
while (BackStack.Remove(view))
{
;
}
//close
try
{
view.gameObject.SetActive(false);
OnViewClosed(view);
if (Instance.DestroyDynamicViews && view.IsDynamicallyCreated)
{
GameObject.Destroy(view.gameObject);
}
}
catch
{ // object destroyed?
}
//remove from owner list
view.Owner?.OpenedChildren.Remove(view);
}
}
public bool TryGoBack()
{
if (!CanGoBack)
{
return(false);
}
var destination = BackStack.LastOrDefault();
if (destination == null)
{
return(false);
}
BackStack.Remove(destination);
AddToForwardStack(
CurrentViewModel,
CurrentContent);
SetCurrent(
destination.ViewModel,
destination.Content);
return(true);
}
public static void RemoveBackEntry(Type pageType)
{
IList <PageStackEntry> entries = BackStack.Where(entry => entry.SourcePageType == pageType).ToList();
foreach (PageStackEntry entry in entries)
{
BackStack.Remove(entry);
}
}
private async Task GoBackAsync()
{
BackStack.Remove(CurrentItem);
ForwardStack.Add(CurrentItem);
if (BackStack.Count > 0)
{
CurrentItem = BackStack.Last();
}
await ReloadAsync();
}
/// <summary>Close the view and all children views</summary>
public static void Close(BaseView view, Action onAnimationDone = null, bool noAnimation = false)
{
//already closed?
if (view.VisibleState == VisibleState.Closed)
{
//view.gameObject.SetActive(false);
ClearOwnerAndShowIfHidden(view);
onAnimationDone?.Invoke();
return;
}
//close children w/o anitmation
if (!Instance.CloseChildrenAfterOwner)
{
CloseAllChildren(view);
}
//remove from back stack
while (BackStack.Remove(view))
{
;
}
//close
var prevState = view.VisibleState;
OnViewClosed(view);
//if was hidden - return
if (prevState == VisibleState.Hidden)
{
view.gameObject.SetActive(false);
if (Instance.CloseChildrenAfterOwner)
{
CloseAllChildren(view);
}
ClearOwnerAndShowIfHidden(view);
return;
}
//get close animation
var anim = view.Animations.CloseAnimation ?? Instance.CloseAnimation;
//play animation and deactivate
Action onDone = () =>
{
if (view)
{
view.gameObject.SetActive(false);
if (Instance.CloseChildrenAfterOwner)
{
CloseAllChildren(view);
}
if (Instance.DestroyDynamicViews && view.IsDynamicallyCreated)
{
GameObject.Destroy(view.gameObject);
}
}
onAnimationDone?.Invoke();
};
var animation = anim?.Animation;
if (noAnimation)
{
animation = null;
}
ClearOwnerAndShowIfHidden(view);
AnimationPlayer.Play(view.RectTransform, animation, onDone, true, 1, 1);
}
private bool InnerNavigate(PageStackEntry entry, NavigationMode mode)
{
try
{
// Navigating
var navigatingFromArgs = new NavigatingCancelEventArgs(
mode,
entry.NavigationTransitionInfo,
entry.Parameter,
entry.SourcePageType
);
Navigating?.Invoke(this, navigatingFromArgs);
CurrentEntry?.Instance.OnNavigatingFrom(navigatingFromArgs);
if (navigatingFromArgs.Cancel)
{
NavigationStopped?.Invoke(this, new NavigationEventArgs(
entry.Instance,
mode,
entry.NavigationTransitionInfo,
entry.Parameter,
entry.SourcePageType,
null
));
return(false);
}
// Navigate
var previousEntry = CurrentEntry;
CurrentEntry = entry;
if (mode == NavigationMode.New)
{
// Doing this first allows CurrentEntry to reuse existing page if pooling is enabled
ReleasePages(ForwardStack);
}
if (CurrentEntry.Instance == null)
{
var page = CreatePageInstanceCached(entry.SourcePageType);
if (page == null)
{
return(false);
}
page.Frame = this;
CurrentEntry.Instance = page;
}
Content = CurrentEntry.Instance;
switch (mode)
{
case NavigationMode.New:
ForwardStack.Clear();
if (previousEntry != null)
{
BackStack.Add(previousEntry);
}
break;
case NavigationMode.Back:
ForwardStack.Add(previousEntry);
BackStack.Remove(CurrentEntry);
break;
case NavigationMode.Forward:
BackStack.Add(previousEntry);
ForwardStack.Remove(CurrentEntry);
break;
case NavigationMode.Refresh:
break;
}
// Navigated
var navigationEvent = new NavigationEventArgs(
CurrentEntry.Instance,
mode,
entry.NavigationTransitionInfo,
entry.Parameter,
entry.SourcePageType,
null
);
previousEntry?.Instance.OnNavigatedFrom(navigationEvent);
CurrentEntry.Instance.OnNavigatedTo(navigationEvent);
Navigated?.Invoke(this, navigationEvent);
VisualTreeHelper.CloseAllPopups();
return(true);
}
catch (Exception exception)
{
NavigationFailed?.Invoke(this, new NavigationFailedEventArgs(entry.SourcePageType, exception));
return(false);
}
}