/// <summary>
/// Navigates forward.
/// </summary>
/// <typeparam name="TViewModel">The type of the view model.</typeparam>
/// <param name="navigator">The stack navigator.</param>
/// <param name="ct">The cancellation token.</param>
/// <param name="viewModelProvider">The method to invoke to instanciate the ViewModel.</param>
/// <param name="suppressTransition">Whether to suppress the navigation transition.</param>
/// <returns>The ViewModel instance of the active page after the navigation operation.</returns>
public static async Task <TViewModel> Navigate <TViewModel>(this IStackNavigator navigator, CancellationToken ct, Func <TViewModel> viewModelProvider, bool suppressTransition = false)
where TViewModel : INavigableViewModel
{
return((TViewModel)await navigator.Navigate(ct, StackNavigatorRequest.GetNavigateRequest(viewModelProvider, suppressTransition)));
}
/// <summary>
/// Creates a new instance of <see cref="NavigationStackEntry"/>.
/// </summary>
/// <param name="request">The navigation request.</param>
/// <param name="viewModel">The ViewModel.</param>
/// <param name="view">The view.</param>
public NavigationStackEntry(StackNavigatorRequest request, INavigableViewModel viewModel, object view)
{
Request = request;
ViewModel = viewModel;
View = view;
}
/// <summary>
/// Processes a <see cref="StackNavigatorRequest"/> based on its <see cref="StackNavigatorRequestType"/>.
/// </summary>
/// <param name="stackNavigator">The stack navigator.</param>
/// <param name="ct">The cancellation token.</param>
/// <param name="request">The request to process.</param>
public static Task ProcessRequest(this IStackNavigator stackNavigator, CancellationToken ct, StackNavigatorRequest request)
{
switch (request.RequestType)
{
case StackNavigatorRequestType.NavigateForward:
return(stackNavigator.Navigate(ct, request));
case StackNavigatorRequestType.NavigateBack:
return(stackNavigator.NavigateBack(ct));
case StackNavigatorRequestType.Clear:
return(stackNavigator.Clear(ct));
case StackNavigatorRequestType.RemoveEntry:
return(stackNavigator.RemoveEntries(ct, request.EntryIndexesToRemove));
default:
throw new NotSupportedException($"The request type '{request.RequestType}' is not supported.");
}
}
public StackNavigatorState(IReadOnlyList <NavigationStackEntry> stack, NavigatorRequestState lastRequestState, StackNavigatorRequest lastRequest)
{
Stack = stack;
LastRequestState = lastRequestState;
LastRequest = lastRequest;
}