Toolkit.Avalonia

2024-04-13 14:55:33 +01:00
parent 862e7b2e34
commit 705d84e56d
13 changed files with 763 additions and 3 deletions
@@ -0,0 +1,70 @@
+using Avalonia.Controls;
+using Avalonia.Controls.Templates;
+using Avalonia.Interactivity;
+using Microsoft.Extensions.DependencyInjection;
+using Toolkit.Foundation;
+
+namespace Toolkit.Avalonia;
+
+public class ContentTemplate :
+    IContentTemplate,
+    IDataTemplate
+{
+    public Control? Build(object? item)
+    {
+        if (item is IObservableViewModel observableViewModel)
+        {
+            if (observableViewModel.ServiceProvider is IServiceProvider provider)
+            {
+                IContentTemplateDescriptorProvider? contentTemplateProvider = provider.GetService<IContentTemplateDescriptorProvider>();
+                INavigationContext? viewModelContentBinder = provider.GetService<INavigationContext>();
+
+                if (contentTemplateProvider?.Get(item.GetType().Name) is IContentTemplateDescriptor descriptor)
+                {
+                    if (provider.GetRequiredKeyedService(descriptor.TemplateType, descriptor.Key) is Control control)
+                    {
+                        async void HandleLoaded(object? sender, RoutedEventArgs args)
+                        {
+                            control.Loaded -= HandleLoaded;
+                            if (control.DataContext is object content)
+                            {
+                                if (content is IInitializer initializer)
+                                {
+                                    await initializer.Initialize();
+                                }
+
+                                if (content is IActivated activated)
+                                {
+                                    await activated.Activated();
+                                }
+                            }
+                        }
+
+                        async void HandleUnloaded(object? sender, RoutedEventArgs args)
+                        {
+                            control.Unloaded -= HandleLoaded;
+                            if (control.DataContext is object content)
+                            {
+                                if (content is IDeactivated deactivated)
+                                {
+                                    await deactivated.Deactivated();
+                                }
+                            }
+                        }
+
+                        control.Loaded += HandleLoaded;
+                        control.Unloaded += HandleUnloaded;
+                        
+                        viewModelContentBinder?.Set(control);
+
+                        return control;
+                    }
+                }
+            }
+        }
+
+        return default;
+    }
+
+    public bool Match(object? data) => true;
+}