public static async Task PushPopupPageAsync(this INavigationService navigationService, string name, NavigationParameters parameters = null, bool animated = true)
{
try
{
var page = CreatePopupPageByName(name);
// Ensure resolved page is not null. This could happen if the resolved page wasn't a Popup Page
if (page == null)
{
throw new PopupPageMissingException($"It seems something went wrong. We seem to have resolved a page for '{name}', but it doesn't seem to be a Popup Page.", new ArgumentNullException(nameof(page)));
}
// Make sure the VML is set to either True or False
if (ViewModelLocator.GetAutowireViewModel(page) == null)
{
ViewModelLocator.SetAutowireViewModel(page, true);
}
var currentPage = GetCurrentPage();
EnsureParametersContainsMode(parameters ?? (parameters = PopupUtilities.CreateNewNavigationParameters()), NavigationMode.New);
HandleINavigatingAware(page, parameters);
await s_popupNavigation.PushAsync(page, animated);
HandleINavigatedAware(currentPage, page, parameters);
}
catch (Exception ex)
{
s_logger.Log(ex.ToString(), Logging.Category.Exception, Logging.Priority.High);
throw;
}
}
private static void HandleINavigatedAware(Page page, NavigationParameters parameters, bool navigatedTo)
{
if (page == null)
{
return;
}
if (parameters == null)
{
parameters = navigatedTo ?
PopupUtilities.CreateNewNavigationParameters() :
PopupUtilities.CreateBackNavigationParameters();
}
PageUtilities.InvokeViewAndViewModelAction <INavigatedAware>(page, (view) => {
if (navigatedTo)
{
view.OnNavigatedTo(parameters);
}
else
{
view.OnNavigatedFrom(parameters);
}
});
PageUtilities.InvokeViewAndViewModelAction <IActiveAware>(page, (view) => view.IsActive = navigatedTo);
}
public static async Task PopupGoBackAsync(this INavigationService navigationService, NavigationParameters parameters = null, bool animate = true)
{
if (s_popupStack.Count == 0)
{
return;
}
var page = s_popupStack.Last();
EnsureParametersContainsMode(parameters ?? (parameters = PopupUtilities.CreateBackNavigationParameters()), NavigationMode.Back);
HandleINavigatedAware(page, parameters, navigatedTo: false);
HandleIDestructiblePage(page);
await s_popupNavigation.PopAsync(animate);
Page currentPage = s_popupStack.LastOrDefault();
if (currentPage == null)
{
currentPage = GetCurrentPage();
}
HandleINavigatedAware(currentPage, parameters, navigatedTo: true);
}
public async Task GetsCorrectTopPage(string uri, Type pageType)
{
var app = GetApp();
var result = await app.GetNavigationService().NavigateAsync(uri);
Assert.Null(result.Exception);
var popupNavigation = app.Container.Resolve <IPopupNavigation>();
var topPage = PopupUtilities.TopPage(popupNavigation, app);
Assert.IsType(pageType, topPage);
var navService = app.Container.Resolve <INavigationService>(PrismApplicationBase.NavigationServiceName);
if (navService is IPageAware pa)
{
pa.Page = topPage;
}
result = await navService.NavigateAsync("PopupPageMock");
Assert.Null(result.Exception);
topPage = PopupUtilities.TopPage(popupNavigation, app);
Assert.IsType <PopupPageMock>(topPage);
}
