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MvxSetup.cs
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MvxSetup.cs
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MS-PL license.
// See the LICENSE file in the project root for more information.
using System.Reflection;
using Microsoft.Extensions.Logging;
using MvvmCross.Base;
using MvvmCross.Commands;
using MvvmCross.IoC;
using MvvmCross.Logging;
using MvvmCross.Navigation;
using MvvmCross.Plugin;
using MvvmCross.ViewModels;
using MvvmCross.Views;
namespace MvvmCross.Core
{
#nullable enable
public abstract class MvxSetup : IMvxSetup
{
public event EventHandler<MvxSetupStateEventArgs>? StateChanged;
private static readonly object _lock = new();
private MvxSetupState _state;
private IMvxIoCProvider? _iocProvider;
protected static Action<IMvxIoCProvider>? RegisterSetupDependencies { get; set; }
protected static Func<IMvxSetup>? SetupCreator { get; set; }
protected static List<Assembly> ViewAssemblies { get; } = new();
protected ILogger? SetupLog { get; private set; }
public MvxSetupState State
{
get => _state;
private set
{
_state = value;
FireStateChange(value);
}
}
public static void RegisterSetupType<TMvxSetup>(params Assembly[] assemblies) where TMvxSetup : MvxSetup, new()
{
// We are using double-checked locking here to avoid overhead of locking if the
// SetupCreator is already created
if (SetupCreator is null)
{
lock (_lock)
{
if (SetupCreator is null)
{
ViewAssemblies.AddRange(assemblies);
if (ViewAssemblies.Count == 0)
{
// fall back to all assemblies. Assembly.GetEntryAssembly() always returns
// null on Xamarin platforms do not use it!
ViewAssemblies.AddRange(AppDomain.CurrentDomain.GetAssemblies());
}
// Avoid creating the instance of Setup right now, instead
// take a reference to the type in a way that we can avoid
// using reflection to create the instance.
SetupCreator = () => new TMvxSetup();
return;
}
}
}
MvxLogHost.Default?.LogInformation("Setup: RegisterSetupType already called");
}
public static IMvxSetup Instance()
{
var instance = SetupCreator?.Invoke();
if (instance == null)
{
instance = MvxSetupExtensions.CreateSetup<MvxSetup>();
}
return instance;
}
protected abstract IMvxApplication CreateApp(IMvxIoCProvider iocProvider);
protected abstract IMvxViewsContainer CreateViewsContainer(IMvxIoCProvider iocProvider);
protected abstract IMvxViewDispatcher CreateViewDispatcher();
public virtual void InitializePrimary()
{
if (State != MvxSetupState.Uninitialized)
{
SetupLog?.Log(LogLevel.Trace,
"InitializePrimary() called when State is not Uninitialized. State: {State}", State);
return;
}
try
{
State = MvxSetupState.InitializingPrimary;
_iocProvider = InitializeIoC();
InitializeLoggingServices(_iocProvider);
// Register the default setup dependencies before
// invoking the static call back.
// Developers can either extend the MvxSetup and override
// the RegisterDefaultSetupDependencies method, or can provide a
// callback method by setting the RegisterSetupDependencies method
RegisterDefaultSetupDependencies(_iocProvider);
RegisterSetupDependencies?.Invoke(_iocProvider);
SetupLog?.Log(LogLevel.Trace, "Setup: Primary start");
SetupLog?.Log(LogLevel.Trace, "Setup: FirstChance start");
InitializeFirstChance(_iocProvider);
SetupLog?.Log(LogLevel.Trace, "Setup: MvvmCross settings start");
InitializeSettings(_iocProvider);
SetupLog?.Log(LogLevel.Trace, "Setup: Singleton Cache start");
InitializeSingletonCache();
SetupLog?.Log(LogLevel.Trace, "Setup: ViewDispatcher start");
InitializeViewDispatcher(_iocProvider);
State = MvxSetupState.InitializedPrimary;
}
catch (Exception e)
{
SetupLog?.Log(LogLevel.Error, e, "InitializePrimary() Failed initializing primary dependencies");
throw;
}
}
public virtual void InitializeSecondary()
{
if (State != MvxSetupState.InitializedPrimary)
{
SetupLog?.Log(LogLevel.Trace,
"InitializeSecondary() called when State is not InitializedPrimary. State: {State}", State);
return;
}
if (_iocProvider == null)
{
SetupLog?.Log(LogLevel.Error, "InitializeSecondary() IoC Provider is null");
throw new InvalidOperationException("Cannot continue setup with null IoCProvider");
}
try
{
State = MvxSetupState.InitializingSecondary;
SetupLog?.Log(LogLevel.Trace, "Setup: Bootstrap actions");
PerformBootstrapActions();
SetupLog?.Log(LogLevel.Trace, "Setup: StringToTypeParser start");
InitializeStringToTypeParser(_iocProvider);
SetupLog?.Log(LogLevel.Trace, "Setup: FillableStringToTypeParser start");
InitializeFillableStringToTypeParser(_iocProvider);
SetupLog?.Log(LogLevel.Trace, "Setup: PluginManagerFramework start");
var pluginManager = InitializePluginFramework(_iocProvider);
SetupLog?.Log(LogLevel.Trace, "Setup: Create App");
var app = InitializeMvxApplication(_iocProvider);
SetupLog?.Log(LogLevel.Trace, "Setup: NavigationService");
InitializeNavigationService(_iocProvider);
SetupLog?.Log(LogLevel.Trace, "Setup: App start");
InitializeApp(pluginManager, app);
SetupLog?.Log(LogLevel.Trace, "Setup: ViewModelTypeFinder start");
InitializeViewModelTypeFinder(_iocProvider);
SetupLog?.Log(LogLevel.Trace, "Setup: ViewsContainer start");
InitializeViewsContainer(_iocProvider);
SetupLog?.Log(LogLevel.Trace, "Setup: Lookup Dictionary start");
var lookup = InitializeLookupDictionary(_iocProvider);
SetupLog?.Log(LogLevel.Trace, "Setup: Views start");
InitializeViewLookup(lookup, _iocProvider);
SetupLog?.Log(LogLevel.Trace, "Setup: CommandCollectionBuilder start");
InitializeCommandCollectionBuilder(_iocProvider);
SetupLog?.Log(LogLevel.Trace, "Setup: NavigationSerializer start");
InitializeNavigationSerializer(_iocProvider);
SetupLog?.Log(LogLevel.Trace, "Setup: InpcInterception start");
InitializeInpcInterception(_iocProvider);
SetupLog?.Log(LogLevel.Trace, "Setup: InpcInterception start");
InitializeViewModelCache(_iocProvider);
SetupLog?.Log(LogLevel.Trace, "Setup: LastChance start");
InitializeLastChance(_iocProvider);
SetupLog?.Log(LogLevel.Trace, "Setup: Secondary end");
State = MvxSetupState.Initialized;
}
catch (Exception e)
{
SetupLog?.Log(LogLevel.Error, e, "InitializeSecondary() failed initializing secondary dependencies");
throw;
}
}
protected virtual void InitializeSingletonCache()
{
#pragma warning disable CA2000 // Dispose objects before losing scope
MvxSingletonCache.Initialize();
#pragma warning restore CA2000 // Dispose objects before losing scope
}
protected virtual void InitializeInpcInterception(IMvxIoCProvider iocProvider)
{
// by default no Inpc calls are intercepted
}
protected virtual IMvxChildViewModelCache InitializeViewModelCache(IMvxIoCProvider iocProvider)
{
ValidateArguments(iocProvider);
var cache = CreateViewModelCache(iocProvider);
return cache;
}
protected virtual IMvxChildViewModelCache CreateViewModelCache(IMvxIoCProvider iocProvider)
{
return iocProvider.Resolve<IMvxChildViewModelCache>();
}
protected virtual IMvxSettings InitializeSettings(IMvxIoCProvider iocProvider)
{
ValidateArguments(iocProvider);
var settings = CreateSettings(iocProvider);
return settings;
}
protected virtual IMvxSettings CreateSettings(IMvxIoCProvider iocProvider)
{
ValidateArguments(iocProvider);
return iocProvider.Resolve<IMvxSettings>();
}
protected virtual IMvxStringToTypeParser InitializeStringToTypeParser(IMvxIoCProvider iocProvider)
{
ValidateArguments(iocProvider);
return CreateStringToTypeParser(iocProvider);
}
protected virtual IMvxStringToTypeParser CreateStringToTypeParser(IMvxIoCProvider iocProvider)
{
ValidateArguments(iocProvider);
return iocProvider.Resolve<IMvxStringToTypeParser>();
}
protected virtual IMvxFillableStringToTypeParser? InitializeFillableStringToTypeParser(IMvxIoCProvider iocProvider)
{
ValidateArguments(iocProvider);
var parser = CreateFillableStringToTypeParser(iocProvider);
iocProvider.RegisterSingleton(parser);
return parser;
}
protected virtual IMvxFillableStringToTypeParser? CreateFillableStringToTypeParser(IMvxIoCProvider iocProvider)
{
ValidateArguments(iocProvider);
return iocProvider.Resolve<IMvxStringToTypeParser>() as IMvxFillableStringToTypeParser;
}
protected virtual void PerformBootstrapActions()
{
var bootstrapRunner = new MvxBootstrapRunner();
foreach (var assembly in GetBootstrapOwningAssemblies())
{
bootstrapRunner.Run(assembly);
}
}
protected virtual IMvxNavigationSerializer InitializeNavigationSerializer(IMvxIoCProvider iocProvider)
{
ValidateArguments(iocProvider);
return CreateNavigationSerializer(iocProvider);
}
protected virtual IMvxNavigationSerializer CreateNavigationSerializer(IMvxIoCProvider iocProvider)
{
ValidateArguments(iocProvider);
return iocProvider.Resolve<IMvxNavigationSerializer>();
}
protected virtual IMvxCommandCollectionBuilder InitializeCommandCollectionBuilder(IMvxIoCProvider iocProvider)
{
ValidateArguments(iocProvider);
return CreateCommandCollectionBuilder(iocProvider);
}
protected virtual IMvxCommandCollectionBuilder CreateCommandCollectionBuilder(IMvxIoCProvider iocProvider)
{
ValidateArguments(iocProvider);
return iocProvider.Resolve<IMvxCommandCollectionBuilder>();
}
protected virtual IMvxIoCProvider InitializeIoC()
{
// initialize the IoC registry, then add it to itself
var iocProvider = CreateIocProvider();
iocProvider.RegisterSingleton(iocProvider);
iocProvider.RegisterSingleton<IMvxSetup>(this);
return iocProvider;
}
protected virtual void RegisterDefaultSetupDependencies(IMvxIoCProvider iocProvider)
{
ValidateArguments(iocProvider);
iocProvider.LazyConstructAndRegisterSingleton<IMvxSettings, MvxSettings>();
iocProvider.LazyConstructAndRegisterSingleton<IMvxStringToTypeParser, MvxStringToTypeParser>();
iocProvider.RegisterSingleton<IMvxPluginManager>(() => new MvxPluginManager(GetPluginConfiguration));
iocProvider.RegisterSingleton(CreateApp(iocProvider));
iocProvider.LazyConstructAndRegisterSingleton<IMvxViewModelLoader, MvxViewModelLoader>();
iocProvider.LazyConstructAndRegisterSingleton<IMvxNavigationService, IMvxViewModelLoader, IMvxViewDispatcher, IMvxIoCProvider>(
(loader, dispatcher, p) => new MvxNavigationService(loader, dispatcher, p));
iocProvider.RegisterSingleton(() => new MvxViewModelByNameLookup());
iocProvider.LazyConstructAndRegisterSingleton<IMvxViewModelByNameLookup, MvxViewModelByNameLookup>(
nameLookup => nameLookup);
iocProvider.LazyConstructAndRegisterSingleton<IMvxViewModelByNameRegistry, MvxViewModelByNameLookup>(
nameLookup => nameLookup);
iocProvider.LazyConstructAndRegisterSingleton<IMvxViewModelTypeFinder, MvxViewModelViewTypeFinder>();
iocProvider.LazyConstructAndRegisterSingleton<IMvxTypeToTypeLookupBuilder, MvxViewModelViewLookupBuilder>();
iocProvider.LazyConstructAndRegisterSingleton<IMvxCommandCollectionBuilder, MvxCommandCollectionBuilder>();
iocProvider.LazyConstructAndRegisterSingleton<IMvxNavigationSerializer, MvxStringDictionaryNavigationSerializer>();
iocProvider.LazyConstructAndRegisterSingleton<IMvxChildViewModelCache, MvxChildViewModelCache>();
iocProvider.RegisterType<IMvxCommandHelper, MvxWeakCommandHelper>();
}
protected virtual IMvxIocOptions CreateIocOptions()
{
return new MvxIocOptions();
}
protected virtual IMvxIoCProvider CreateIocProvider()
{
return MvxIoCProvider.Initialize(CreateIocOptions());
}
protected virtual void InitializeFirstChance(IMvxIoCProvider iocProvider)
{
// always the very first thing to get initialized - after IoC and base platform
// base class implementation is empty by default
}
protected virtual void InitializeLoggingServices(IMvxIoCProvider iocProvider)
{
ValidateArguments(iocProvider);
var logProvider = CreateLogProvider();
var loggerFactory = CreateLogFactory();
if (logProvider != null)
{
iocProvider.RegisterSingleton(logProvider);
loggerFactory?.AddProvider(logProvider);
}
if (loggerFactory != null)
{
iocProvider.RegisterSingleton(loggerFactory);
iocProvider.RegisterType(typeof(ILogger<>), typeof(Logger<>));
SetupLog = loggerFactory.CreateLogger<MvxSetup>();
}
}
protected abstract ILoggerProvider? CreateLogProvider();
protected abstract ILoggerFactory? CreateLogFactory();
protected virtual IMvxViewModelLoader CreateViewModelLoader(IMvxIoCProvider iocProvider)
{
ValidateArguments(iocProvider);
return iocProvider.Resolve<IMvxViewModelLoader>();
}
protected virtual IMvxNavigationService CreateNavigationService(IMvxIoCProvider iocProvider)
{
ValidateArguments(iocProvider);
return iocProvider.Resolve<IMvxNavigationService>();
}
protected virtual IMvxPluginManager InitializePluginFramework(IMvxIoCProvider iocProvider)
{
ValidateArguments(iocProvider);
var pluginManager = CreatePluginManager(iocProvider);
LoadPlugins(pluginManager);
return pluginManager;
}
protected virtual IMvxPluginManager CreatePluginManager(IMvxIoCProvider iocProvider)
{
ValidateArguments(iocProvider);
return iocProvider.Resolve<IMvxPluginManager>();
}
protected virtual IMvxPluginConfiguration? GetPluginConfiguration(Type plugin)
{
return null;
}
public virtual IEnumerable<Assembly> GetPluginAssemblies()
{
var mvvmCrossAssemblyName = typeof(MvxPluginAttribute).Assembly.GetName().Name;
var assemblies = AppDomain.CurrentDomain.GetAssemblies();
return assemblies
.AsParallel()
.Where(assembly => AssemblyReferencesMvvmCross(assembly, mvvmCrossAssemblyName));
}
private static bool AssemblyReferencesMvvmCross(Assembly assembly, string mvvmCrossAssemblyName)
{
try
{
return Array.Exists(assembly.GetReferencedAssemblies(), a => a.Name == mvvmCrossAssemblyName);
}
#pragma warning disable CA1031 // Do not catch general exception types
catch (Exception)
#pragma warning restore CA1031 // Do not catch general exception types
{
return false;
}
}
public virtual void LoadPlugins(IMvxPluginManager pluginManager)
{
if (pluginManager == null)
throw new ArgumentNullException(nameof(pluginManager));
var pluginAttribute = typeof(MvxPluginAttribute);
var pluginAssemblies = GetPluginAssemblies();
// Search Assemblies for Plugins
foreach (var pluginAssembly in pluginAssemblies)
{
var assemblyTypes = pluginAssembly.ExceptionSafeGetTypes();
// Search Types for Valid Plugin
foreach (var type in assemblyTypes.Where(TypeContainsPluginAttribute))
{
// Ensure Plugin has been loaded
pluginManager.EnsurePluginLoaded(type);
}
}
bool TypeContainsPluginAttribute(Type type) =>
type.GetCustomAttributes(pluginAttribute, false).Length > 0;
}
protected virtual IMvxApplication CreateMvxApplication(IMvxIoCProvider iocProvider)
{
ValidateArguments(iocProvider);
return iocProvider.Resolve<IMvxApplication>();
}
protected virtual IMvxApplication InitializeMvxApplication(IMvxIoCProvider iocProvider)
{
ValidateArguments(iocProvider);
var app = CreateMvxApplication(iocProvider);
iocProvider.RegisterSingleton<IMvxViewModelLocatorCollection>(app);
return app;
}
protected virtual void InitializeApp(IMvxPluginManager pluginManager, IMvxApplication app)
{
if (app == null)
throw new ArgumentNullException(nameof(app));
app.LoadPlugins(pluginManager);
SetupLog?.Log(LogLevel.Trace, "Setup: Application Initialize - On background thread");
app.Initialize();
}
protected virtual IMvxViewsContainer InitializeViewsContainer(IMvxIoCProvider iocProvider)
{
ValidateArguments(iocProvider);
var container = CreateViewsContainer(iocProvider);
iocProvider.RegisterSingleton(container);
return container;
}
protected virtual void InitializeViewDispatcher(IMvxIoCProvider iocProvider)
{
ValidateArguments(iocProvider);
var dispatcher = CreateViewDispatcher();
iocProvider.RegisterSingleton(dispatcher);
iocProvider.RegisterSingleton<IMvxMainThreadAsyncDispatcher>(dispatcher);
iocProvider.RegisterSingleton<IMvxMainThreadDispatcher>(dispatcher);
}
protected virtual IMvxNavigationService InitializeNavigationService(IMvxIoCProvider iocProvider)
{
ValidateArguments(iocProvider);
CreateViewModelLoader(iocProvider);
var navigationService = CreateNavigationService(iocProvider);
SetupLog?.Log(LogLevel.Trace, "Setup: Load navigation routes");
LoadNavigationServiceRoutes(navigationService, iocProvider);
return navigationService;
}
protected virtual void LoadNavigationServiceRoutes(IMvxNavigationService navigationService, IMvxIoCProvider iocProvider)
{
if (navigationService == null)
throw new ArgumentNullException(nameof(navigationService));
ValidateArguments(iocProvider);
navigationService.LoadRoutes(GetViewModelAssemblies());
}
public virtual IEnumerable<Assembly> GetViewAssemblies()
{
if (ViewAssemblies.Count == 0)
ViewAssemblies.Add(GetType().GetTypeInfo().Assembly);
return ViewAssemblies;
}
public virtual IEnumerable<Assembly> GetViewModelAssemblies()
{
var app = _iocProvider?.Resolve<IMvxApplication>();
if (app != null)
{
var assembly = app.GetType().GetTypeInfo().Assembly;
return new[] { assembly };
}
return Array.Empty<Assembly>();
}
protected virtual IEnumerable<Assembly> GetBootstrapOwningAssemblies()
{
return GetViewAssemblies().Distinct();
}
protected abstract IMvxNameMapping CreateViewToViewModelNaming();
protected virtual IMvxViewModelByNameLookup CreateViewModelByNameLookup(IMvxIoCProvider iocProvider)
{
ValidateArguments(iocProvider);
return iocProvider.Resolve<IMvxViewModelByNameLookup>();
}
protected virtual IMvxViewModelByNameRegistry CreateViewModelByNameRegistry(IMvxIoCProvider iocProvider)
{
ValidateArguments(iocProvider);
return iocProvider.Resolve<IMvxViewModelByNameRegistry>();
}
protected virtual IMvxNameMapping InitializeViewModelTypeFinder(IMvxIoCProvider iocProvider)
{
ValidateArguments(iocProvider);
CreateViewModelByNameLookup(iocProvider);
var viewModelByNameRegistry = CreateViewModelByNameRegistry(iocProvider);
var viewModelAssemblies = GetViewModelAssemblies();
foreach (var assembly in viewModelAssemblies)
{
viewModelByNameRegistry.AddAll(assembly);
}
var nameMappingStrategy = CreateViewToViewModelNaming();
iocProvider.RegisterSingleton(nameMappingStrategy);
return nameMappingStrategy;
}
protected virtual IDictionary<Type, Type> InitializeLookupDictionary(IMvxIoCProvider iocProvider)
{
ValidateArguments(iocProvider);
var viewAssemblies = GetViewAssemblies();
var builder = iocProvider.Resolve<IMvxTypeToTypeLookupBuilder>();
return builder.Build(viewAssemblies);
}
protected virtual IMvxViewsContainer? InitializeViewLookup(IDictionary<Type, Type> viewModelViewLookup,
IMvxIoCProvider iocProvider)
{
ValidateArguments(iocProvider);
var container = iocProvider.Resolve<IMvxViewsContainer>();
container.AddAll(viewModelViewLookup);
return container;
}
protected virtual void InitializeLastChance(IMvxIoCProvider iocProvider)
{
// always the very last thing to get initialized
// base class implementation is empty by default
}
public IEnumerable<Type> CreatableTypes()
{
return CreatableTypes(GetType().GetTypeInfo().Assembly);
}
public IEnumerable<Type> CreatableTypes(Assembly assembly)
{
return assembly.CreatableTypes();
}
private void FireStateChange(MvxSetupState state)
{
StateChanged?.Invoke(this, new MvxSetupStateEventArgs(state));
}
protected static void ValidateArguments(IMvxIoCProvider iocProvider)
{
if (iocProvider == null)
throw new ArgumentNullException(nameof(iocProvider));
}
}
#nullable restore
}