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path: root/Xamarin.Forms.Platform.WinRT/VisualElementExtensions.cs
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Diffstat (limited to 'Xamarin.Forms.Platform.WinRT/VisualElementExtensions.cs')
-rw-r--r--Xamarin.Forms.Platform.WinRT/VisualElementExtensions.cs56
1 files changed, 56 insertions, 0 deletions
diff --git a/Xamarin.Forms.Platform.WinRT/VisualElementExtensions.cs b/Xamarin.Forms.Platform.WinRT/VisualElementExtensions.cs
new file mode 100644
index 00000000..9dfd12bb
--- /dev/null
+++ b/Xamarin.Forms.Platform.WinRT/VisualElementExtensions.cs
@@ -0,0 +1,56 @@
+´╗┐using System;
+
+#if WINDOWS_UWP
+
+namespace Xamarin.Forms.Platform.UWP
+#else
+
+namespace Xamarin.Forms.Platform.WinRT
+#endif
+{
+ public static class VisualElementExtensions
+ {
+ public static IVisualElementRenderer GetOrCreateRenderer(this VisualElement self)
+ {
+ if (self == null)
+ throw new ArgumentNullException("self");
+
+ IVisualElementRenderer renderer = Platform.GetRenderer(self);
+ if (renderer == null)
+ {
+ renderer = RendererFactory.CreateRenderer(self);
+ Platform.SetRenderer(self, renderer);
+ }
+
+ return renderer;
+ }
+
+ internal static void Cleanup(this VisualElement self)
+ {
+ if (self == null)
+ throw new ArgumentNullException("self");
+
+ IVisualElementRenderer renderer = Platform.GetRenderer(self);
+
+ foreach (Element element in self.Descendants())
+ {
+ var visual = element as VisualElement;
+ if (visual == null)
+ continue;
+
+ IVisualElementRenderer childRenderer = Platform.GetRenderer(visual);
+ if (childRenderer != null)
+ {
+ childRenderer.Dispose();
+ Platform.SetRenderer(visual, null);
+ }
+ }
+
+ if (renderer != null)
+ {
+ renderer.Dispose();
+ Platform.SetRenderer(self, null);
+ }
+ }
+ }
+} \ No newline at end of file