public bool TryClose(IDataContext dataContext)
{
Should.NotBeNull(dataContext, nameof(dataContext));
var viewModel = dataContext.GetData(NavigationConstants.ViewModel);
if (viewModel == null)
{
return(false);
}
if (CurrentContent?.DataContext() == viewModel)
{
return(GoBack(dataContext));
}
if (!CanClose(dataContext))
{
return(false);
}
if (RaiseNavigating(new NavigatingCancelEventArgs(NavigationMode.Remove, dataContext)))
{
var message = new MvvmActivityMediator.FinishActivityMessage(viewModel);
EventAggregator.Publish(this, message);
if (message.IsFinished)
{
RaiseNavigated(viewModel, NavigationMode.Remove, null, dataContext);
}
return(message.IsFinished);
}
return(true);
}
public virtual bool TryClose(IViewModel viewModel, IDataContext dataContext)
{
Should.NotBeNull(viewModel, nameof(viewModel));
if (CurrentContent != null && CurrentContent.DataContext() == viewModel)
{
GoBack();
//Ignore close just in case there backstack fragments.
return(false);
}
var message = new MvvmActivityMediator.FinishActivityMessage(viewModel);
ServiceProvider.EventAggregator.Publish(this, message);
return(message.Finished);
}
private void ClearBackStack(Intent intent, IViewModel viewModel, bool bringToFront, IDataContext dataContext)
{
if (intent != null)
{
if (AndroidToolkitExtensions.IsApiLessThanOrEqualTo10)
{
intent.AddFlags(ActivityFlags.NewTask | ActivityFlags.ClearTop);
}
else
{
intent.AddFlags(ActivityFlags.NewTask | ActivityFlags.ClearTask);
}
}
var message = new MvvmActivityMediator.FinishActivityMessage();
if (bringToFront)
{
if (viewModel != null)
{
message.IgnoredViewModels = new[] { viewModel }
}
;
}
EventAggregator.Publish(this, message);
if (message.FinishedViewModels != null)
{
message.FinishedViewModels.Reverse();
foreach (var vm in message.FinishedViewModels)
{
var ctx = new DataContext(dataContext);
ctx.AddOrUpdate(NavigationConstants.ViewModel, vm);
RaiseNavigated(vm, NavigationMode.Remove, null, ctx);
}
}
}
#endregion
#region Implementation of INavigationService
object INavigationService.CurrentContent => AndroidToolkitExtensions.CurrentActivity;
public virtual bool TryClose(IViewModel viewModel, IDataContext dataContext)
{
Should.NotBeNull(viewModel, "viewModel");
if (CurrentContent != null && CurrentContent.DataContext() == viewModel)
{
GoBack();
//Ignore close just in case there backstack fragments.
return false;
}
var message = new MvvmActivityMediator.FinishActivityMessage(viewModel);
ServiceProvider.EventAggregator.Publish(this, message);
return message.Finished;
}
public virtual bool Navigate(IViewMappingItem source, string parameter, IDataContext dataContext)
{
Should.NotBeNull(source, nameof(source));
if (dataContext == null)
dataContext = DataContext.Empty;
bool bringToFront;
dataContext.TryGetData(NavigationProviderConstants.BringToFront, out bringToFront);
if (!RaiseNavigating(new NavigatingCancelEventArgs(source, bringToFront ? NavigationMode.Refresh : NavigationMode.New, parameter)))
return false;
var activity = PlatformExtensions.CurrentActivity ?? SplashScreenActivityBase.Current;
var context = activity ?? Application.Context;
var intent = new Intent(context, source.ViewType);
if (activity == null)
intent.AddFlags(ActivityFlags.NewTask);
else if (dataContext.GetData(NavigationConstants.ClearBackStack))
{
if (PlatformExtensions.IsApiLessThanOrEqualTo10)
intent.AddFlags(ActivityFlags.NewTask | ActivityFlags.ClearTop);
else
intent.AddFlags(ActivityFlags.NewTask | ActivityFlags.ClearTask);
ServiceProvider.EventAggregator.Publish(this, MvvmActivityMediator.FinishActivityMessage.Instance);
dataContext.AddOrUpdate(NavigationProviderConstants.InvalidateAllCache, true);
}
if (parameter != null)
intent.PutExtra(ParameterString, parameter);
if (bringToFront)
{
_isReorder = true;
//http://stackoverflow.com/questions/20695522/puzzling-behavior-with-reorder-to-front
//http://code.google.com/p/android/issues/detail?id=63570#c2
bool closed = false;
if (PlatformExtensions.IsApiGreaterThanOrEqualTo19)
{
var viewModel = dataContext.GetData(NavigationConstants.ViewModel);
if (viewModel != null)
{
var view = viewModel.Settings.Metadata.GetData(ViewModelConstants.View);
var activityView = ToolkitExtensions.GetUnderlyingView<object>(view) as Activity;
if (activityView != null && activityView.IsTaskRoot)
{
var message = new MvvmActivityMediator.FinishActivityMessage(viewModel);
ServiceProvider.EventAggregator.Publish(this, message);
closed = message.Finished;
}
}
}
if (!closed)
intent.AddFlags(ActivityFlags.ReorderToFront);
dataContext.AddOrUpdate(NavigationProviderConstants.InvalidateCache, true);
}
_isNew = true;
_parameter = parameter;
StartActivity(context, intent, source, dataContext);
return true;
}
public bool Navigate(IViewMappingItem source, string parameter, IDataContext dataContext)
{
Should.NotBeNull(source, nameof(source));
Should.NotBeNull(dataContext, nameof(dataContext));
bool clearBackStack = dataContext.GetData(NavigationConstants.ClearBackStack);
var viewModel = dataContext.GetData(NavigationConstants.ViewModel);
var currentView = viewModel?.GetCurrentView <object>();
if (currentView != null && ReferenceEquals(currentView, CurrentContent))
{
if (clearBackStack)
{
ClearBackStack(null, viewModel, true, dataContext);
}
RaiseNavigated(currentView, NavigationMode.Refresh, parameter, dataContext);
return(true);
}
bool bringToFront;
dataContext.TryGetData(NavigationProvider.BringToFront, out bringToFront);
if (!RaiseNavigating(new NavigatingCancelEventArgs(source, bringToFront ? NavigationMode.Refresh : NavigationMode.New, parameter, dataContext)))
{
return(false);
}
_newContext = dataContext;
var activity = AndroidToolkitExtensions.CurrentActivity;
var context = activity ?? Application.Context;
var intent = new Intent(context, source.ViewType);
if (activity == null)
{
intent.AddFlags(ActivityFlags.NewTask);
}
else if (clearBackStack)
{
ClearBackStack(intent, viewModel, bringToFront, dataContext);
}
if (parameter != null)
{
intent.PutExtra(IntentParameterKey, parameter);
}
if (bringToFront)
{
if (viewModel != null)
{
intent.PutExtra(MvvmActivityMediator.IntentViewModelIdKey, viewModel.GetViewModelId().ToString("N"));
}
//http://stackoverflow.com/questions/20695522/puzzling-behavior-with-reorder-to-front
//http://code.google.com/p/android/issues/detail?id=63570#c2
bool closed = false;
if (!clearBackStack && AndroidToolkitExtensions.IsApiGreaterThanOrEqualTo19)
{
var activityView = viewModel?.GetCurrentView <object>() as Activity;
if (activityView != null && activityView.IsTaskRoot)
{
var message = new MvvmActivityMediator.FinishActivityMessage(viewModel);
EventAggregator.Publish(this, message);
closed = message.IsFinished;
}
}
if (!closed)
{
intent.AddFlags(ActivityFlags.ReorderToFront);
}
viewModel?.Settings.Metadata.AddOrUpdate(NavigationProvider.BringToFront, true);
}
StartActivity(context, intent, source, dataContext);
return(true);
}
public bool Navigate(IViewMappingItem source, string parameter, IDataContext dataContext)
{
Should.NotBeNull(source, nameof(source));
Should.NotBeNull(dataContext, nameof(dataContext));
bool bringToFront;
dataContext.TryGetData(NavigationProvider.BringToFront, out bringToFront);
if (!RaiseNavigating(new NavigatingCancelEventArgs(source, bringToFront ? NavigationMode.Refresh : NavigationMode.New, parameter, dataContext)))
{
return(false);
}
_newContext = dataContext;
bool clearBackStack = dataContext.GetData(NavigationConstants.ClearBackStack);
var activity = AndroidToolkitExtensions.CurrentActivity;
var context = activity ?? Application.Context;
var intent = new Intent(context, source.ViewType);
if (activity == null)
{
intent.AddFlags(ActivityFlags.NewTask);
}
else if (clearBackStack)
{
if (AndroidToolkitExtensions.IsApiLessThanOrEqualTo10)
{
intent.AddFlags(ActivityFlags.NewTask | ActivityFlags.ClearTop);
}
else
{
intent.AddFlags(ActivityFlags.NewTask | ActivityFlags.ClearTask);
}
var message = new MvvmActivityMediator.FinishActivityMessage();
if (bringToFront)
{
var viewModel = dataContext.GetData(NavigationConstants.ViewModel);
if (viewModel != null)
{
message.IgnoredViewModels = new[] { viewModel }
}
;
}
ServiceProvider.EventAggregator.Publish(this, message);
if (message.FinishedViewModels != null)
{
message.FinishedViewModels.Reverse();
foreach (var vm in message.FinishedViewModels)
{
var ctx = new DataContext(dataContext);
ctx.AddOrUpdate(NavigationConstants.ViewModel, vm);
RaiseNavigated(vm, NavigationMode.Remove, null, ctx);
}
}
}
if (parameter != null)
{
intent.PutExtra(ParameterId, parameter);
}
if (bringToFront)
{
//http://stackoverflow.com/questions/20695522/puzzling-behavior-with-reorder-to-front
//http://code.google.com/p/android/issues/detail?id=63570#c2
bool closed = false;
if (!clearBackStack && AndroidToolkitExtensions.IsApiGreaterThanOrEqualTo19)
{
var viewModel = dataContext.GetData(NavigationConstants.ViewModel);
var activityView = viewModel?.GetCurrentView <object>() as Activity;
if (activityView != null && activityView.IsTaskRoot)
{
var message = new MvvmActivityMediator.FinishActivityMessage(viewModel);
ServiceProvider.EventAggregator.Publish(this, message);
closed = message.IsFinished;
}
}
if (!closed)
{
intent.AddFlags(ActivityFlags.ReorderToFront);
}
}
StartActivity(context, intent, source, dataContext);
return(true);
}
public virtual bool Navigate(IViewMappingItem source, string parameter, IDataContext dataContext)
{
Should.NotBeNull(source, nameof(source));
if (dataContext == null)
{
dataContext = DataContext.Empty;
}
bool bringToFront;
dataContext.TryGetData(NavigationProviderConstants.BringToFront, out bringToFront);
if (!RaiseNavigating(new NavigatingCancelEventArgs(source, bringToFront ? NavigationMode.Refresh : NavigationMode.New, parameter)))
{
return(false);
}
var activity = PlatformExtensions.CurrentActivity ?? SplashScreenActivityBase.Current;
var context = activity ?? Application.Context;
var intent = new Intent(context, source.ViewType);
if (activity == null)
{
intent.AddFlags(ActivityFlags.NewTask);
}
else if (dataContext.GetData(NavigationConstants.ClearBackStack))
{
if (PlatformExtensions.IsApiLessThanOrEqualTo10)
{
intent.AddFlags(ActivityFlags.NewTask | ActivityFlags.ClearTop);
}
else
{
intent.AddFlags(ActivityFlags.NewTask | ActivityFlags.ClearTask);
}
ServiceProvider.EventAggregator.Publish(this, MvvmActivityMediator.FinishActivityMessage.Instance);
dataContext.AddOrUpdate(NavigationProviderConstants.InvalidateAllCache, true);
}
if (parameter != null)
{
intent.PutExtra(ParameterString, parameter);
}
if (bringToFront)
{
_isReorder = true;
//http://stackoverflow.com/questions/20695522/puzzling-behavior-with-reorder-to-front
//http://code.google.com/p/android/issues/detail?id=63570#c2
bool closed = false;
if (PlatformExtensions.IsApiGreaterThanOrEqualTo19)
{
var viewModel = dataContext.GetData(NavigationConstants.ViewModel);
if (viewModel != null)
{
var view = viewModel.Settings.Metadata.GetData(ViewModelConstants.View);
var activityView = ToolkitExtensions.GetUnderlyingView <object>(view) as Activity;
if (activityView != null && activityView.IsTaskRoot)
{
var message = new MvvmActivityMediator.FinishActivityMessage(viewModel);
ServiceProvider.EventAggregator.Publish(this, message);
closed = message.Finished;
}
}
}
if (!closed)
{
intent.AddFlags(ActivityFlags.ReorderToFront);
}
dataContext.AddOrUpdate(NavigationProviderConstants.InvalidateCache, true);
}
_isNew = true;
_parameter = parameter;
StartActivity(context, intent, source, dataContext);
return(true);
}
