Add Content lookup markupextension

2022-12-14 20:07:45 +00:00
parent b77ee21d56
commit f7e682e0db
32 changed files with 783 additions and 229 deletions
@@ -0,0 +1,51 @@
+using Avalonia;
+using Mediator;
+using System.Diagnostics;
+using Toolkit.Framework.Foundation;
+
+namespace Toolkit.Framework.Avalonia;
+
+public class ContentHandler : IRequestHandler<Content, object?>
+{
+    private readonly INamedContentTemplateFactory namedContentTemplateFactory;
+    private readonly INamedContentFactory namedContentFactory;
+    private readonly IContentTemplateFactory contentTemplateFactory;
+    private readonly ITypedContentFactory typedContentFactory;
+
+    public ContentHandler(IContentTemplateFactory contentTemplateFactory,
+        INamedContentFactory namedContentFactory,
+        INamedContentTemplateFactory namedContentTemplateFactory,
+        ITypedContentFactory typedContentFactory)
+    {
+        this.contentTemplateFactory = contentTemplateFactory;
+        this.namedContentFactory = namedContentFactory;
+        this.namedContentTemplateFactory = namedContentTemplateFactory;
+        this.typedContentFactory = typedContentFactory;
+    }
+    
+    public ValueTask<object?> Handle(Content request, CancellationToken cancellationToken)
+    {
+        object? content = null;
+        object? template = null;
+
+        if (request.Name is { Length: > 0 } name)
+        {
+            content = namedContentFactory.Create(name, request.Parameters);
+            template = namedContentTemplateFactory.Create(name);
+        }
+
+        if (request.Type is Type type)
+        {
+            content = typedContentFactory.Create(type, request.Parameters);
+            template = contentTemplateFactory.Create(content);
+        }
+
+        if (template is Visual visual)
+        {
+            visual.DataContext = content;
+            return new ValueTask<object?>(visual);
+        }
+
+        return default;
+    }
+}
@@ -0,0 +1,37 @@
+using Avalonia.Controls;
+using Avalonia.Controls.Templates;
+using Toolkit.Framework.Foundation;
+
+namespace Toolkit.Framework.Avalonia;
+
+public class ContentTemplateSelector : IDataTemplate, IContentTemplateSelector
+{
+    private readonly Dictionary<object, IControl> dataTracking = new();
+
+    private readonly IContentTemplateFactory templateFactory;
+
+    public ContentTemplateSelector(IContentTemplateFactory templateFactory)
+    {
+        this.templateFactory = templateFactory;
+    }
+
+    public IControl? Build(object? item)
+    {
+        if (item is not null)
+        {
+            if (dataTracking.TryGetValue(item, out IControl? control))
+            {
+                return control;
+            }
+
+            return (IControl?)templateFactory.Create(item);
+        }
+
+        return null;
+    }
+
+    public bool Match(object? data)
+    {
+        return true;
+    }
+}