public void PresentShouldInvokeCallbackOnClear()
{
var vm = GetViewModel <NavigableViewModelMock>();
IOperationCallback operationCallback = null;
ApplicationSettings.Platform = new PlatformInfo(PlatformType.WPF, new Version(0, 0));
OperationCallbackManager.Register = (type, o, arg3, arg4) =>
{
type.ShouldEqual(OperationType.TabNavigation);
operationCallback = arg3;
};
OperationCallbackManager.SetResult = (o, result) =>
{
result.Operation.ShouldEqual(OperationType.TabNavigation);
o.ShouldEqual(vm);
operationCallback.Invoke(result);
};
vm.OperationResult = true;
MultiViewModel viewModel = GetMultiViewModel();
IDynamicViewModelPresenter presenter = new DynamicMultiViewModelPresenter(viewModel,
OperationCallbackManager);
IAsyncOperation <bool?> task = presenter.TryShowAsync(vm, DataContext.Empty, null);
task.ShouldNotBeNull();
task.IsCompleted.ShouldBeFalse();
viewModel.Clear();
task.IsCompleted.ShouldBeTrue();
task.Result.Result.ShouldEqual(true);
operationCallback.ShouldNotBeNull();
}
protected virtual void NavigationServiceOnNavigated(object sender, NavigationEventArgsBase e)
{
string idOperation = null;
try
{
var context = CreateContextNavigateTo(CurrentViewModel, e);
idOperation = context.GetData(OperationIdConstant);
IOperationCallback callback = null;
if (idOperation == _currentOperationId)
{
callback = _currentCallback;
_currentCallback = null;
_navigationTargetVm = null;
_lastContext = null;
}
UpdateNavigationContext(callback, context.ViewModelTo, e, ref context);
OnNavigated(context);
}
finally
{
if (idOperation == _currentOperationId)
{
_currentOperationId = null;
var tcs = _navigatedTcs;
if (tcs != null)
{
_navigatedTcs = null;
tcs.TrySetResult(null);
}
}
}
}
public void PresentShouldInvokeCallbackOnRemove()
{
var vm = GetViewModel <NavigableViewModelMock>();
IOperationCallback operationCallback = null;
OperationCallbackManager.Register = (type, o, arg3, arg4) =>
{
type.ShouldEqual(OperationType.TabNavigation);
operationCallback = arg3;
};
OperationCallbackManager.SetResult = (o, result) =>
{
result.Operation.ShouldEqual(OperationType.TabNavigation);
o.ShouldEqual(vm);
operationCallback.Invoke(result);
};
vm.OperationResult = true;
MultiViewModel viewModel = GetMultiViewModel();
IDynamicViewModelPresenter presenter = new DynamicMultiViewModelPresenter(viewModel,
OperationCallbackManager, (model, context, arg3) => true);
IAsyncOperation <bool?> task = presenter.TryShowAsync(vm, DataContext.Empty, null);
task.ShouldNotBeNull();
task.IsCompleted.ShouldBeFalse();
viewModel.RemoveViewModelAsync(vm).Result.ShouldBeTrue();
task.IsCompleted.ShouldBeTrue();
task.Result.Result.ShouldEqual(true);
operationCallback.ShouldNotBeNull();
}
protected virtual void RegisterInternal(OperationType operation, [NotNull] object target,
[NotNull] IOperationCallback callback, [NotNull] IDataContext context)
{
CallbackDictionary callbacks;
var viewModel = target as IViewModel;
if (viewModel != null && callback.IsSerializable)
{
lock (_locker)
{
if (!viewModel.Settings.State.TryGetData(CallbackConstant, out callbacks))
{
callbacks = new CallbackDictionary();
viewModel.Settings.State.Add(CallbackConstant, callbacks);
}
}
}
else
{
callbacks = ServiceProvider
.AttachedValueProvider
.GetOrAdd(target, CallbacksMember, (o, o1) => new CallbackDictionary(), null);
}
RegisterInternal(callbacks, operation.Id, callback);
}
void IOperationCallbackManager.Register(OperationType operation, object source, IOperationCallback callback,
IDataContext context)
{
if (Register == null)
Tracer.Warn("OperationCallbackManagerMock: Register == null");
else
Register(operation, source, callback, context);
}
private void CancelCurrentNavigation(INavigationContext context)
{
var callback = _currentCallback;
if (callback != null)
{
callback.Invoke(OperationResult.CreateCancelResult <bool?>(OperationType.Navigation, this, context));
_currentCallback = null;
_navigationTargetVm = null;
}
}
private void OnNavigating(NavigatingCancelEventArgsBase args)
{
if (_ignoreNavigating)
{
return;
}
var currentViewModel = CurrentViewModel;
if (currentViewModel == null)
{
return;
}
_ignoreCloseFromViewModel = true;
args.Cancel = true;
var context = CreateContextNavigateFrom(currentViewModel, _navigationTargetVm, args);
var navigateTask = (_closedFromViewModel || !args.IsCancelable)
? Empty.TrueTask
: OnNavigatingFrom(currentViewModel, context);
var t = navigateTask.TryExecuteSynchronously(task =>
{
if (task.IsCanceled || !task.Result)
{
CancelCurrentNavigation(context);
return;
}
if (task.IsFaulted)
{
var callback = _currentCallback;
if (callback != null)
{
callback.Invoke(OperationResult.CreateErrorResult <bool?>(OperationType.Navigation,
currentViewModel, task.Exception, context));
_currentCallback = null;
}
return;
}
ThreadManager.InvokeOnUiThreadAsync(() =>
{
try
{
_ignoreNavigating = true;
Renavigate(currentViewModel, context, args);
}
finally
{
_ignoreNavigating = false;
}
});
});
t.TryExecuteSynchronously(task => _ignoreCloseFromViewModel = false);
t.WithTaskExceptionHandler(this);
}
/// <summary>
/// Registers the specified operation callback.
/// </summary>
public void Register(OperationType operation, object source, IOperationCallback callback, IDataContext context)
{
Should.NotBeNull(operation, "operation");
Should.NotBeNull(source, "source");
Should.NotBeNull(callback, "callback");
if (context == null)
{
context = DataContext.Empty;
}
RegisterInternal(operation, source, callback, context);
Tracer.Info("Callback '{0}' was registered, source: '{1}'", operation, source);
}
public void Register(OperationType operation, object target, IOperationCallback callback, IDataContext context)
{
Should.NotBeNull(operation, nameof(operation));
Should.NotBeNull(target, nameof(target));
Should.NotBeNull(callback, nameof(callback));
if (context == null)
{
context = DataContext.Empty;
}
RegisterInternal(operation, target, callback, context);
if (Tracer.TraceInformation)
{
Tracer.Info("Callback '{0}' was registered, target: '{1}'", operation, target);
}
}
public Task NavigateAsync(IOperationCallback callback, IDataContext context)
{
Should.NotBeNull(context, nameof(context));
IViewModel viewModel = context.GetData(NavigationConstants.ViewModel);
if (viewModel == null)
{
throw new InvalidOperationException($"The '{GetType()}' provider doesn't support the DataContext without navigation target.");
}
context = context.ToNonReadOnly();
if (ReferenceEquals(viewModel, CurrentViewModel))
{
if (callback != null)
{
CallbackManager.Register(OperationType.PageNavigation, viewModel, callback, context);
}
return(Empty.Task);
}
//The view model is already shown as page and we need to bring it to front
if (viewModel.Settings.State.Contains(IsNavigatedConstant))
{
context.AddOrUpdate(NavigationProviderConstants.BringToFront, true);
}
string viewName = viewModel.GetViewName(context);
var vmType = viewModel.GetType();
var mappingItem = ViewMappingProvider.FindMappingForViewModel(vmType, viewName, true);
var id = Guid.NewGuid().ToString("n");
var parameter = GenerateNavigationParameter(vmType, id);
var tcs = new TaskCompletionSource <object>();
CurrentNavigationTask.TryExecuteSynchronously(_ =>
ThreadManager.InvokeOnUiThreadAsync(() =>
{
_navigatedTcs = tcs;
_navigationTargetVm = viewModel;
_currentCallback = callback;
_lastContext = context;
_currentOperationId = id;
if (_navigationService.Navigate(mappingItem, parameter, context))
{
ClearCacheIfNeed(context, viewModel);
}
}));
return(tcs.Task);
}
public Task ShowAsync(IOperationCallback callback, IDataContext context)
{
ViewModel.NotBeDisposed();
if (IsOpen)
{
throw ExceptionManager.WindowOpened();
}
var tcs = new TaskCompletionSource <object>();
RaiseNavigating(context, NavigationMode.New)
.TryExecuteSynchronously(task =>
{
try
{
if (!task.Result)
{
tcs.TrySetCanceled();
if (callback != null)
{
callback.Invoke(OperationResult.CreateCancelResult <bool?>(OperationType.WindowNavigation, ViewModel, context));
}
return;
}
if (context == null)
{
context = DataContext.Empty;
}
if (callback != null)
{
OperationCallbackManager.Register(OperationType.WindowNavigation, ViewModel, callback, context);
}
_isOpen = true;
ShowInternal(context, tcs);
}
catch (Exception e)
{
tcs.TrySetException(e);
if (callback != null)
{
callback.Invoke(OperationResult.CreateErrorResult <bool?>(OperationType.WindowNavigation, ViewModel, e, context));
}
}
});
return(tcs.Task);
}
private void CancelCurrentNavigation(INavigationContext context)
{
var callback = _currentCallback;
if (callback != null)
{
callback.Invoke(OperationResult.CreateCancelResult <bool?>(OperationType.PageNavigation, context.ViewModelTo ?? (object)this, context));
_currentCallback = null;
_navigationTargetVm = null;
}
var tcs = _navigatedTcs;
if (tcs != null)
{
_navigatedTcs = null;
tcs.TrySetCanceled();
}
}
/// <summary>
/// Navigates using the specified data context.
/// </summary>
/// <param name="callback">The specified callback, if any.</param>
/// <param name="context">
/// The specified <see cref="IDataContext" />.
/// </param>
public void Navigate(IOperationCallback callback, IDataContext context)
{
Should.NotBeNull(context, "context");
IViewModel viewModel = context.GetData(NavigationConstants.ViewModel);
if (viewModel == null)
{
throw new InvalidOperationException(string.Format("The '{0}' provider doesn't support the DataContext without navigation target.", GetType()));
}
if (ReferenceEquals(viewModel, CurrentViewModel))
{
if (callback != null)
{
callback.Invoke(OperationResult.CreateResult <bool?>(OperationType.Navigation, CurrentViewModel, true, context));
}
return;
}
string viewName = viewModel.GetViewName(context);
var parameters = context.GetData(NavigationConstants.Parameters);
var vmType = viewModel.GetType();
var mappingItem = FindMappingForViewModel(vmType, viewName);
object parameter;
if (parameters != null)
{
parameters = parameters.ToNonReadOnly();
parameters.Add(VmTypeConstant, vmType.AssemblyQualifiedName);
parameter = parameters;
}
else
{
parameter = vmType.AssemblyQualifiedName;
}
ThreadManager.InvokeOnUiThreadAsync(() =>
{
CancelCurrentNavigation(null);
_navigationTargetVm = viewModel;
_currentCallback = callback;
_navigationService.Navigate(mappingItem, parameter, context);
});
}
/// <summary>
/// Shows the specified <see cref="IViewModel" />.
/// </summary>
/// <param name="callback">The specified callback, if any.</param>
/// <param name="context">The specified context.</param>
public void Show(IOperationCallback callback, IDataContext context)
{
ViewModel.NotBeDisposed();
if (IsOpen)
{
throw ExceptionManager.WindowOpened();
}
_isOpen = true;
if (context == null)
{
context = DataContext.Empty;
}
if (callback != null)
{
OperationCallbackManager.Register(OperationType.WindowNavigation, ViewModel, callback, context);
}
OnShow(context);
ShowInternal(context);
}
private void UpdateNavigationContext(IOperationCallback callback, IViewModel navigationViewModel, NavigationEventArgsBase args, ref INavigationContext context)
{
var vmType = context.GetData(ViewModelTypeConstant);
if (vmType == null)
{
return;
}
var viewModel = GetViewModelForView(args, navigationViewModel, context, vmType);
if (!ReferenceEquals(context.ViewModelTo, viewModel))
{
context = new NavigationContext(NavigationType.Page, context.NavigationMode, context.ViewModelFrom, viewModel, context.NavigationProvider);
}
if (viewModel != null && callback != null)
{
RegisterOperationCallback(viewModel, callback, context);
}
}
public Task NavigateAsync(IOperationCallback callback, IDataContext context)
{
Should.NotBeNull(context, "context");
IViewModel viewModel = context.GetData(NavigationConstants.ViewModel);
if (viewModel == null)
{
throw new InvalidOperationException(string.Format("The '{0}' provider doesn't support the DataContext without navigation target.", GetType()));
}
if (ReferenceEquals(viewModel, CurrentViewModel))
{
if (callback != null)
{
callback.Invoke(OperationResult.CreateResult <bool?>(OperationType.PageNavigation, CurrentViewModel, true, context));
}
return(Empty.Task);
}
string viewName = viewModel.GetViewName(context);
var vmType = viewModel.GetType();
var mappingItem = FindMappingForViewModel(vmType, viewName);
var id = Guid.NewGuid().ToString("n");
var parameter = GenerateNavigationParameter(vmType, id);
var tcs = new TaskCompletionSource <object>();
CurrentNavigationTask.TryExecuteSynchronously(_ =>
ThreadManager.InvokeOnUiThreadAsync(() =>
{
_navigatedTcs = tcs;
_navigationTargetVm = viewModel;
_currentCallback = callback;
_lastContext = context;
_currentOperationId = id;
if (_navigationService.Navigate(mappingItem, parameter, context))
{
ClearCacheIfNeed(context, viewModel);
}
}));
return(tcs.Task);
}
private void RegisterInternal(CallbackDictionary callbacks, string id, IOperationCallback callback)
{
//Only for debug callback
if (AlwaysSerializeCallback && callback.IsSerializable)
{
var stream = _serializer.Serialize(callback);
stream.Position = 0;
callback = (IOperationCallback)_serializer.Deserialize(stream);
}
lock (callbacks)
{
List <object> list;
if (!callbacks.TryGetValue(id, out list))
{
list = new List <object>();
callbacks[id] = list;
}
list.Add(callback);
}
}
protected void RegisterOperationCallback([NotNull] IViewModel viewModel, [NotNull] IOperationCallback callback, [NotNull] INavigationContext context)
{
CallbackManager.Register(OperationType.PageNavigation, viewModel, callback, context);
}
private void CancelCurrentNavigation(INavigationContext context)
{
var callback = _currentCallback;
if (callback != null)
{
callback.Invoke(OperationResult.CreateCancelResult<bool?>(OperationType.PageNavigation, this, context));
_currentCallback = null;
_navigationTargetVm = null;
}
var tcs = _navigatedTcs;
if (tcs != null)
{
_navigatedTcs = null;
tcs.TrySetCanceled();
}
}
private void UpdateNavigationContext(IOperationCallback callback, IViewModel navigationViewModel, NavigationEventArgsBase args, ref INavigationContext context)
{
var vmType = context.GetData(ViewModelTypeConstant);
if (vmType == null)
return;
var viewModel = GetViewModelForView(args, navigationViewModel, context, vmType);
if (!ReferenceEquals(context.ViewModelTo, viewModel))
context = new NavigationContext(NavigationType.Page, context.NavigationMode, context.ViewModelFrom, viewModel, context.NavigationProvider);
if (viewModel != null && callback != null)
RegisterOperationCallback(viewModel, callback, context);
}
private void OnNavigating(NavigatingCancelEventArgsBase args)
{
if (_ignoreNavigating)
return;
var currentViewModel = CurrentViewModel;
if (currentViewModel == null)
return;
try
{
_closingViewModel = currentViewModel;
args.Cancel = true;
var context = CreateContextNavigateFrom(currentViewModel, args);
var navigateTask = (_closedFromViewModel || !args.IsCancelable)
? Empty.TrueTask
: OnNavigatingFrom(currentViewModel, context);
var t = navigateTask.TryExecuteSynchronously(task =>
{
if (!task.IsCanceled && task.IsFaulted)
{
_closingViewModel = null;
var callback = _currentCallback;
if (callback != null)
{
callback.Invoke(OperationResult.CreateErrorResult<bool?>(OperationType.PageNavigation,
currentViewModel, task.Exception, context));
_currentCallback = null;
}
return;
}
if (task.IsCanceled || !task.Result)
{
_closingViewModel = null;
CancelCurrentNavigation(context);
return;
}
ThreadManager.InvokeOnUiThreadAsync(() =>
{
try
{
_ignoreNavigating = true;
Renavigate(currentViewModel, context, args);
}
finally
{
_closingViewModel = null;
_ignoreNavigating = false;
}
});
});
t.WithTaskExceptionHandler(this);
}
catch (Exception)
{
_closingViewModel = null;
throw;
}
}
private void OnNavigated(INavigationContext context)
{
var vmFrom = context.ViewModelFrom;
var vmTo = context.ViewModelTo;
var mode = context.NavigationMode;
//only this mode allows to renavigate.
if (ReferenceEquals(vmFrom, vmTo) && mode != NavigationMode.Refresh && mode != NavigationMode.Reset && mode != NavigationMode.Undefined)
{
Tracer.Warn("Possible bug in navigation, navigate to the same view model with mode " + mode);
return;
}
try
{
CurrentViewModel = vmTo;
if (vmFrom != null)
{
var navigableViewModel = vmFrom as INavigableViewModel;
if (navigableViewModel != null)
{
navigableViewModel.OnNavigatedFrom(context);
}
}
var closeableViewModel = vmFrom as ICloseableViewModel;
if (closeableViewModel != null)
{
closeableViewModel.Closed -= _closeViewModelHandler;
var wrapper = closeableViewModel.CloseCommand as CloseCommandWrapper;
if (wrapper != null)
{
closeableViewModel.CloseCommand = wrapper.NestedCommand;
}
}
closeableViewModel = vmTo as ICloseableViewModel;
if (closeableViewModel != null && !(closeableViewModel.CloseCommand is CloseCommandWrapper))
{
closeableViewModel.Closed += _closeViewModelHandler;
closeableViewModel.CloseCommand = new CloseCommandWrapper(closeableViewModel.CloseCommand, this);
}
if (vmTo != null)
{
OnNavigatedTo(vmTo, context);
RaiseNavigated(context, vmTo);
}
if (vmFrom != null)
{
TryCompleteOperationCallback(vmFrom, context);
}
Tracer.Info("Navigated from '{0}' to '{1}', navigation mode '{2}'", vmFrom, vmTo, mode);
}
catch (Exception ex)
{
Tracer.Error(ex.Flatten(true));
throw;
}
finally
{
_currentCallback = null;
_navigationTargetVm = null;
}
}
void IOperationCallbackManager.Register(OperationType operation, object source, IOperationCallback callback,
IDataContext context)
{
if (Register == null)
{
Tracer.Warn("OperationCallbackManagerMock: Register == null");
}
else
{
Register(operation, source, callback, context);
}
}
/// <summary>
/// Navigates using the specified data context.
/// </summary>
/// <param name="callback">The specified callback, if any.</param>
/// <param name="context">
/// The specified <see cref="IDataContext" />.
/// </param>
public Task NavigateAsync(IOperationCallback callback, IDataContext context)
{
Should.NotBeNull(context, "context");
IViewModel viewModel = context.GetData(NavigationConstants.ViewModel);
if (viewModel == null)
throw new InvalidOperationException(string.Format("The '{0}' provider doesn't support the DataContext without navigation target.", GetType()));
if (ReferenceEquals(viewModel, CurrentViewModel))
{
if (callback != null)
callback.Invoke(OperationResult.CreateResult<bool?>(OperationType.PageNavigation, CurrentViewModel, true, context));
return Empty.Task;
}
string viewName = viewModel.GetViewName(context);
var vmType = viewModel.GetType();
var mappingItem = FindMappingForViewModel(vmType, viewName);
var id = Guid.NewGuid().ToString("n");
var parameter = vmType.AssemblyQualifiedName + IdSeparator[0] + id;
var tcs = new TaskCompletionSource<object>();
CurrentNavigationTask.TryExecuteSynchronously(_ =>
ThreadManager.InvokeOnUiThreadAsync(() =>
{
_navigatedTcs = tcs;
_navigationTargetVm = viewModel;
_currentCallback = callback;
_lastContext = context;
_currentOperationId = id;
if (_navigationService.Navigate(mappingItem, parameter, context))
ClearCacheIfNeed(context, viewModel);
}));
return tcs.Task;
}
/// <summary>
/// Subscriber to the Navigated event.
/// </summary>
protected virtual void NavigationServiceOnNavigated(object sender, NavigationEventArgsBase e)
{
string idOperation = null;
try
{
var context = CreateContextNavigateTo(CurrentViewModel, e);
idOperation = context.GetData(OperationIdConstant);
IOperationCallback callback = null;
if (idOperation == _currentOperationId)
{
callback = _currentCallback;
_currentCallback = null;
_navigationTargetVm = null;
_lastContext = null;
}
UpdateNavigationContext(callback, context.ViewModelTo, e, ref context);
OnNavigated(context);
}
finally
{
if (idOperation == _currentOperationId)
{
_currentOperationId = null;
var tcs = _navigatedTcs;
if (tcs != null)
{
_navigatedTcs = null;
tcs.TrySetResult(null);
}
}
}
}
public Task NavigateAsync(IOperationCallback callback, IDataContext context)
{
Should.NotBeNull(context, nameof(context));
IViewModel viewModel = context.GetData(NavigationConstants.ViewModel);
if (viewModel == null)
throw new InvalidOperationException($"The '{GetType()}' provider doesn't support the DataContext without navigation target.");
context = context.ToNonReadOnly();
if (ReferenceEquals(viewModel, CurrentViewModel))
{
if (callback != null)
CallbackManager.Register(OperationType.PageNavigation, viewModel, callback, context);
return Empty.Task;
}
//The view model is already shown as page and we need to bring it to front
if (viewModel.Settings.State.Contains(IsNavigatedConstant))
context.AddOrUpdate(NavigationProviderConstants.BringToFront, true);
string viewName = viewModel.GetViewName(context);
var vmType = viewModel.GetType();
var mappingItem = ViewMappingProvider.FindMappingForViewModel(vmType, viewName, true);
var id = Guid.NewGuid().ToString("n");
var parameter = GenerateNavigationParameter(vmType, id);
var tcs = new TaskCompletionSource<object>();
CurrentNavigationTask.TryExecuteSynchronously(_ =>
ThreadManager.InvokeOnUiThreadAsync(() =>
{
_navigatedTcs = tcs;
_navigationTargetVm = viewModel;
_currentCallback = callback;
_lastContext = context;
_currentOperationId = id;
if (_navigationService.Navigate(mappingItem, parameter, context))
ClearCacheIfNeed(context, viewModel);
}));
return tcs.Task;
}
