public static void EnsureBindingContextIsSet(this IMvxFragmentView fragment)
{
var actualFragment = fragment.ToFragment();
if (actualFragment == null)
{
throw new MvxException($"{nameof(EnsureBindingContextIsSet)} called on an {nameof(IMvxFragmentView)} which is not an Android Fragment: {fragment}");
}
if (fragment.BindingContext == null)
{
fragment.BindingContext = new MvxAndroidBindingContext(actualFragment.Activity,
new MvxSimpleLayoutInflaterHolder(
actualFragment.Activity.LayoutInflater),
fragment.DataContext);
}
else
{
var androidContext = fragment.BindingContext as IMvxAndroidBindingContext;
if (androidContext != null)
{
androidContext.LayoutInflaterHolder = new MvxSimpleLayoutInflaterHolder(actualFragment.Activity.LayoutInflater);
}
}
}
protected virtual void PerformShowFragmentTransaction(
FragmentManager fragmentManager,
MvxFragmentPresentationAttribute attribute,
MvxViewModelRequest request)
{
var fragmentName = FragmentJavaName(attribute.ViewType);
IMvxFragmentView fragment = null;
if (attribute.IsCacheableFragment)
{
fragment = (IMvxFragmentView)fragmentManager.FindFragmentByTag(fragmentName);
}
fragment = fragment ?? CreateFragment(attribute, fragmentName);
var fragmentView = fragment.ToFragment();
// MvxNavigationService provides an already instantiated ViewModel here,
// therefore just assign it
if (request is MvxViewModelInstanceRequest instanceRequest)
{
fragment.ViewModel = instanceRequest.ViewModelInstance;
}
else
{
var bundle = new Bundle();
var serializedRequest = NavigationSerializer.Serializer.SerializeObject(request);
bundle.PutString(ViewModelRequestBundleKey, serializedRequest);
if (fragmentView != null)
{
if (fragmentView.Arguments == null)
{
fragmentView.Arguments = bundle;
}
else
{
fragmentView.Arguments.Clear();
fragmentView.Arguments.PutAll(bundle);
}
}
}
var ft = fragmentManager.BeginTransaction();
OnBeforeFragmentChanging(ft, fragmentView, attribute);
if (attribute.AddToBackStack == true)
{
ft.AddToBackStack(fragmentName);
}
OnFragmentChanging(ft, fragmentView, attribute);
ft.Replace(attribute.FragmentContentId, (Fragment)fragment, fragmentName);
ft.CommitAllowingStateLoss();
OnFragmentChanged(ft, fragmentView, attribute);
}
public static void OnCreate(this IMvxFragmentView fragmentView, IMvxBundle bundle, MvxViewModelRequest request = null)
{
if (fragmentView.ViewModel != null)
{
//TODO call MvxViewModelLoader.Reload when it's added in MvvmCross, tracked by #1165
//until then, we're going to re-run the viewmodel lifecycle here.
Android.Views.MvxFragmentExtensions.RunViewModelLifecycle(fragmentView.ViewModel, bundle, request);
return;
}
var fragment = fragmentView.ToFragment();
if (fragment == null)
{
throw new MvxException($"{nameof(OnCreate)} called on an {nameof(IMvxFragmentView)} which is not an Android Fragment: {fragmentView}");
}
// as it is called during onCreate it is safe to assume that fragment has Activity attached.
var viewModelType = fragmentView.FindAssociatedViewModelType(fragment.Activity.GetType());
var view = fragmentView as IMvxView;
var cache = Mvx.Resolve <IMvxMultipleViewModelCache>();
var cached = cache.GetAndClear(viewModelType, fragmentView.UniqueImmutableCacheTag);
view.OnViewCreate(() => cached ?? fragmentView.LoadViewModel(bundle, fragment.Activity.GetType(), request));
}
public static void OnCreate(this IMvxFragmentView fragmentView, IMvxBundle bundle, MvxViewModelRequest request = null)
{
var cache = Mvx.IoCProvider.Resolve <IMvxMultipleViewModelCache>();
if (fragmentView.ViewModel != null)
{
// check if ViewModel instance was cached. If so, clear it and ignore previous instance
cache.GetAndClear(fragmentView.ViewModel.GetType(), fragmentView.UniqueImmutableCacheTag);
return;
}
var fragment = fragmentView.ToFragment();
if (fragment == null)
{
throw new MvxException($"{nameof(OnCreate)} called on an {nameof(IMvxFragmentView)} which is not an Android Fragment: {fragmentView}");
}
// as it is called during onCreate it is safe to assume that fragment has Activity attached.
var viewModelType = fragmentView.FindAssociatedViewModelType(fragment.Activity.GetType());
var view = fragmentView as IMvxView;
var cached = cache.GetAndClear(viewModelType, fragmentView.UniqueImmutableCacheTag);
view.OnViewCreate(() => cached ?? fragmentView.LoadViewModel(bundle, fragment.Activity.GetType(), request));
}
public static void RegisterFragmentViewToCacheIfNeeded(this IMvxFragmentView fragmentView, Type fragmentParentActivityType)
{
Fragment representedFragment = fragmentView.ToFragment();
if (representedFragment == null)
{
throw new InvalidOperationException($"Represented type: {fragmentView.GetType()} is not a Fragment!");
}
var fragmentParentActivtiy = representedFragment.Activity;
if (fragmentParentActivtiy == null)
{
throw new InvalidOperationException("Something wrong happend, fragment has no activity attached during registration!");
}
IFragmentCacheableActivity cacheableActivity = fragmentParentActivtiy as IFragmentCacheableActivity;
if (cacheableActivity == null)
{
throw new InvalidOperationException($"Fragment has activity attached but it does not implement {nameof(IFragmentCacheableActivity)} ! Cannot register fragment to cache!");
}
if (string.IsNullOrEmpty(fragmentView.UniqueImmutableCacheTag))
{
throw new InvalidOperationException("Contract failed - Fragment tag is null! Fragment tags are not set by default, you should add tag during FragmentTransaction or override UniqueImmutableCacheTag in your Fragment class.");
}
var fragmentCacheConfiguration = cacheableActivity.FragmentCacheConfiguration;
fragmentCacheConfiguration.RegisterFragmentToCache(fragmentView.UniqueImmutableCacheTag, fragmentView.GetType(), fragmentView.FindAssociatedViewModelType(fragmentParentActivityType));
}
public static void EnsureSetupInitialized(this IMvxFragmentView fragmentView)
{
var fragment = fragmentView.ToFragment();
var setupSingleton = MvxAndroidSetupSingleton.EnsureSingletonAvailable(fragment.Activity.ApplicationContext);
setupSingleton.EnsureInitialized();
}
public static void EnsureSetupInitialized(this IMvxFragmentView fragmentView)
{
var fragment = fragmentView.ToFragment();
if (fragment == null)
{
throw new MvxException($"{nameof(EnsureSetupInitialized)} called on an {nameof(IMvxFragmentView)} which is not an Android Fragment: {fragmentView}");
}
var setup = MvxAndroidSetupSingleton.EnsureSingletonAvailable(fragment.Activity.ApplicationContext);
setup.EnsureInitialized();
}
public static void EnsureSetupInitialized(this IMvxFragmentView fragmentView)
{
var fragment = fragmentView.ToFragment();
if (fragment == null)
{
throw new MvxException("EnsureSetupInitialized called on an IMvxFragmentView which is not an Android Fragment: {0}", fragmentView);
}
var setupSingleton = MvxAndroidSetupSingleton.EnsureSingletonAvailable(fragment.Activity.ApplicationContext);
setupSingleton.EnsureInitialized();
}
public static void EnsureBindingContextIsSet(this IMvxFragmentView fragment, LayoutInflater inflater)
{
var actualFragment = fragment.ToFragment();
if (fragment.BindingContext == null)
{
fragment.BindingContext = new MvxAndroidBindingContext(actualFragment.Activity,
new MvxSimpleLayoutInflaterHolder(inflater),
fragment.DataContext);
}
else
{
var androidContext = fragment.BindingContext as IMvxAndroidBindingContext;
if (androidContext != null)
{
androidContext.LayoutInflaterHolder = new MvxSimpleLayoutInflaterHolder(inflater);
}
}
}
protected virtual void PerformShowFragmentTransaction(
FragmentManager fragmentManager,
MvxFragmentPresentationAttribute attribute,
MvxViewModelRequest request)
{
var fragmentName = FragmentJavaName(attribute.ViewType);
IMvxFragmentView fragment = null;
if (attribute.IsCacheableFragment)
{
fragment = (IMvxFragmentView)fragmentManager.FindFragmentByTag(fragmentName);
}
fragment = fragment ?? CreateFragment(attribute, fragmentName);
// MvxNavigationService provides an already instantiated ViewModel here,
// therefore just assign it
if (request is MvxViewModelInstanceRequest instanceRequest)
{
fragment.ViewModel = instanceRequest.ViewModelInstance;
}
else
{
var bundle = new Bundle();
var serializedRequest = NavigationSerializer.Serializer.SerializeObject(request);
bundle.PutString(ViewModelRequestBundleKey, serializedRequest);
var fragmentView = fragment.ToFragment();
if (fragmentView != null)
{
if (fragmentView.Arguments == null)
{
fragmentView.Arguments = bundle;
}
else
{
fragmentView.Arguments.Clear();
fragmentView.Arguments.PutAll(bundle);
}
}
}
var ft = fragmentManager.BeginTransaction();
if (attribute.SharedElements != null)
{
foreach (var item in attribute.SharedElements)
{
string name = item.Key;
if (string.IsNullOrEmpty(name))
{
name = ViewCompat.GetTransitionName(item.Value);
}
ft.AddSharedElement(item.Value, name);
}
}
if (!attribute.EnterAnimation.Equals(int.MinValue) && !attribute.ExitAnimation.Equals(int.MinValue))
{
if (!attribute.PopEnterAnimation.Equals(int.MinValue) && !attribute.PopExitAnimation.Equals(int.MinValue))
{
ft.SetCustomAnimations(attribute.EnterAnimation, attribute.ExitAnimation, attribute.PopEnterAnimation, attribute.PopExitAnimation);
}
else
{
ft.SetCustomAnimations(attribute.EnterAnimation, attribute.ExitAnimation);
}
}
if (attribute.TransitionStyle != int.MinValue)
{
ft.SetTransitionStyle(attribute.TransitionStyle);
}
if (attribute.AddToBackStack == true)
{
ft.AddToBackStack(fragmentName);
}
ft.Replace(attribute.FragmentContentId, (Fragment)fragment, fragmentName);
ft.CommitAllowingStateLoss();
}