private void UpdateBackForward()
{
CanGoBack = Browser.GetBrowser().CanGoBack;
CanGoForward = Browser.GetBrowser().CanGoForward;
CanGoBackChanged?.Invoke(this, CanGoBack);
CanGoForwardChanged?.Invoke(this, CanGoForward);
}
public NavigationService(Frame frame)
{
_frame = new FrameFacade(frame, this);
_frame.CanGoBackChanged += (s, e) =>
CanGoBackChanged?.Invoke(this, EventArgs.Empty);
_frame.CanGoForwardChanged += (s, e) =>
CanGoForwardChanged?.Invoke(this, EventArgs.Empty);
}
public FrameFacade(Frame frame, INavigationServiceUwp navigationService)
{
_frame = frame;
_navigationService = navigationService;
_frame.RegisterPropertyChangedCallback(Frame.CanGoBackProperty, (s, p)
=> CanGoBackChanged?.Invoke(this, EventArgs.Empty));
_frame.RegisterPropertyChangedCallback(Frame.CanGoForwardProperty, (s, p)
=> CanGoForwardChanged?.Invoke(this, EventArgs.Empty));
}
public NavigationService(ILoggerFacade logger, IFrameFacade frameFacade)
{
_frameFacade = frameFacade;
_frameFacade.CanGoBackChanged += (s, e) =>
CanGoBackChanged?.Invoke(this, EventArgs.Empty);
_frameFacade.CanGoForwardChanged += (s, e) =>
CanGoForwardChanged?.Invoke(this, EventArgs.Empty);
_logger = logger;
}
private NavigationService(Frame frame)
{
_frame = new FrameFacade(frame, this);
_frame.CanGoBackChanged += (s, e) =>
CanGoBackChanged?.Invoke(this, EventArgs.Empty);
_frame.CanGoForwardChanged += (s, e) =>
CanGoForwardChanged?.Invoke(this, EventArgs.Empty);
Instances.Add(frame, this);
_logger = PrismApplicationBase.Current.Container.Resolve <ILoggerFacade>();
}
internal NavigationService(Frame frame, string id)
{
_frame = new FrameFacade(frame, this, id);
_frame.CanGoBackChanged += (s, e) =>
CanGoBackChanged?.Invoke(this, EventArgs.Empty);
_frame.CanGoForwardChanged += (s, e) =>
CanGoForwardChanged?.Invoke(this, EventArgs.Empty);
Instances.Add(frame, this);
_logger = ApplicationTemplate.Current.Container.Resolve <ILoggerFacade>();
}
internal FrameFacade(Frame frame, IPlatformNavigationService navigationService)
{
_frame = frame;
_frame.ContentTransitions = new TransitionCollection();
_frame.ContentTransitions.Add(new NavigationThemeTransition());
_frame.RegisterPropertyChangedCallback(Frame.CanGoBackProperty, (s, p)
=> CanGoBackChanged?.Invoke(this, EventArgs.Empty));
_frame.RegisterPropertyChangedCallback(Frame.CanGoForwardProperty, (s, p)
=> CanGoForwardChanged?.Invoke(this, EventArgs.Empty));
_dispatcher = frame.Dispatcher;
_navigationService = navigationService;
}
public FrameFacade(Frame frame, ILoggerFacade logger)
{
_frame = frame;
_frame.ContentTransitions = new TransitionCollection
{
new NavigationThemeTransition()
};
_frame.RegisterPropertyChangedCallback(Frame.CanGoBackProperty, (s, p)
=> CanGoBackChanged?.Invoke(this, EventArgs.Empty));
_frame.RegisterPropertyChangedCallback(Frame.CanGoForwardProperty, (s, p)
=> CanGoForwardChanged?.Invoke(this, EventArgs.Empty));
_dispatcher = frame.Dispatcher;
_syncContext = SynchronizationContext.Current;
_logger = logger;
}
internal FrameFacade(Frame frame, IPlatformNavigationService navigationService)
{
_frame = frame;
_frame.ContentTransitions = new TransitionCollection
{
new NavigationThemeTransition()
};
_frame.RegisterPropertyChangedCallback(Frame.CanGoBackProperty, (s, p)
=> CanGoBackChanged?.Invoke(this, EventArgs.Empty));
_frame.RegisterPropertyChangedCallback(Frame.CanGoForwardProperty, (s, p)
=> CanGoForwardChanged?.Invoke(this, EventArgs.Empty));
_dispatcher = frame.Dispatcher;
_syncContext = SynchronizationContext.Current;
_navigationService = navigationService;
_logger = PrismApplicationBase.Current.Container.Resolve <ILoggerFacade>();
}
public void Forward()
{
var currentEntry = HistoryStack.FirstOrDefault(h => h.Current);
int currentIndex = HistoryStack.ToList().IndexOf(currentEntry);
var validNavigationStack = HistoryStack
// Transform to list so we don't affect the original stack
?.ToList();
// Find the index of the current address in the valid history items
int currentIndex_validStack = validNavigationStack.FindIndex(h => h.VisitedAt == currentEntry.VisitedAt);
var newEntry = validNavigationStack.ElementAtOrDefault(currentIndex_validStack - 1);
if (newEntry is null)
{
// We can't go forward, the UI should reflect that
CanGoForwardChanged?.Invoke(false);
// And the code shouldn't try.
return;
}
foreach (var h in HistoryStack)
{
h.Current = false;
}
// This is the entry we're navigating to, so it should be marked as current
HistoryStack.First(h => h.VisitedAt == newEntry.VisitedAt).Current = true;
if (newEntry != null)
{
CanGoBackChanged?.Invoke(true);
// If there is something else at the front of the stack, we can navigate forward to it
CanGoForwardChanged?.Invoke(currentIndex_validStack - 1 > 0);
ForwardRequested?.Invoke(newEntry);
}
}
public void Back()
{
var currentEntry = HistoryStack.FirstOrDefault(h => h.Current);
int currentIndex = HistoryStack.ToList().IndexOf(currentEntry);
var validNavigationStack = HistoryStack
// Transform to list so we don't affect the original stack
?.ToList();
// Find the index of the current address in the valid history items
int currentIndex_validStack = validNavigationStack.FindLastIndex(h => h.Current);
var newEntry = validNavigationStack.ElementAtOrDefault(currentIndex_validStack + 1);
if (newEntry is null)
{
// We can't go back, the UI should reflect that
CanGoBackChanged?.Invoke(false);
// And the code shouldn't try.
return;
}
foreach (var h in HistoryStack)
{
h.Current = false;
}
// This is the entry we're navigating to, so it should be marked as current
HistoryStack.First(h => h.VisitedAt == newEntry.VisitedAt).Current = true;
int newHistoryItemIndexOnStack = HistoryStack.ToList().FindIndex(h => h.VisitedAt == newEntry.VisitedAt);
if (validNavigationStack != null)
{
CanGoBackChanged?.Invoke(newHistoryItemIndexOnStack + 1 < HistoryStack.Count());
CanGoForwardChanged?.Invoke(true);
BackRequested?.Invoke(newEntry);
}
}
public void Navigate(Uri address)
{
// Reset all entries to not current
foreach (var h in HistoryStack)
{
h.Current = false;
}
var newNavigationEntry = new NavigationEntry()
{
Kind = NavigationPageType.Web,
WebUri = address,
VisitedAt = DateTime.Now,
Current = true
};
HistoryStack.Push(newNavigationEntry);
CanGoBackChanged?.Invoke(true);
CanGoForwardChanged?.Invoke(false);
NavigationRequested?.Invoke(newNavigationEntry);
}
public void Navigate(Type pageType, object param)
{
// Reset all entries to not current
foreach (var h in HistoryStack)
{
h.Current = false;
}
var newNavigationEntry = new NavigationEntry()
{
Kind = NavigationPageType.Native,
NativePageType = pageType,
NativePageParam = param,
VisitedAt = DateTime.Now,
Current = true
};
HistoryStack.Push(newNavigationEntry);
CanGoBackChanged?.Invoke(true);
CanGoForwardChanged?.Invoke(false);
NavigationRequested?.Invoke(newNavigationEntry);
}
protected virtual void OnCanGoForwardChanged(EventArgs e)
{
CanGoForwardChanged?.Invoke(this, e);
}
