From cfcd54dbe0f5a66582ae8835967f5e0a3395eb1a Mon Sep 17 00:00:00 2001
From: Ellpeck <megamaximal@gmail.com>
Date: Sun, 1 Sep 2019 18:34:19 +0200
Subject: [PATCH] made text input not test the release build of android :V
 reflection is a pain

---
 MLEM.Ui/UiSystem.cs             | 11 +++++------
 MLEM/Misc/TextInputReflector.cs | 30 ++++++++++++++++++++++++++++++
 2 files changed, 35 insertions(+), 6 deletions(-)
 create mode 100644 MLEM/Misc/TextInputReflector.cs

diff --git a/MLEM.Ui/UiSystem.cs b/MLEM.Ui/UiSystem.cs
index d247dd9..19d73af 100644
--- a/MLEM.Ui/UiSystem.cs
+++ b/MLEM.Ui/UiSystem.cs
@@ -7,6 +7,7 @@ using Microsoft.Xna.Framework.Input;
 using MLEM.Extensions;
 using MLEM.Font;
 using MLEM.Input;
+using MLEM.Misc;
 using MLEM.Textures;
 using MLEM.Ui.Elements;
 using MLEM.Ui.Style;
@@ -67,10 +68,12 @@ namespace MLEM.Ui {
             };
 
             if (InputHandler.TextInputSupported) {
-                AddToTextInput(window, (key, character) => {
+                // this needs to be done using reflection because the event and 
+                // its argument class don't exist on non-Desktop devices annoyingly
+                new TextInputReflector((sender, key, character) => {
                     foreach (var root in this.rootElements)
                         root.Element.Propagate(e => e.OnTextInput?.Invoke(e, key, character));
-                });
+                }).AddToWindow(window);
             }
 
             this.OnSelectedElementDrawn = (element, time, batch, alpha, offset) => {
@@ -80,10 +83,6 @@ namespace MLEM.Ui {
             };
         }
 
-        private static void AddToTextInput(GameWindow window, Action<Keys, char> func) {
-            window.TextInput += (sender, args) => func(args.Key, args.Character);
-        }
-
         public void Update(GameTime time) {
             this.Controls.Update();
 
diff --git a/MLEM/Misc/TextInputReflector.cs b/MLEM/Misc/TextInputReflector.cs
new file mode 100644
index 0000000..01f34d2
--- /dev/null
+++ b/MLEM/Misc/TextInputReflector.cs
@@ -0,0 +1,30 @@
+using System;
+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Input;
+
+namespace MLEM.Misc {
+    public class TextInputReflector {
+
+        private readonly TextInputCallback callback;
+
+        public TextInputReflector(TextInputCallback callback) {
+            this.callback = callback;
+        }
+
+        public void AddToWindow(GameWindow window) {
+            var evt = window.GetType().GetEvent("TextInput");
+            var handler = this.GetType().GetMethod(nameof(this.OnTextInput), new[] {typeof(object), typeof(EventArgs)});
+            evt.AddEventHandler(window, Delegate.CreateDelegate(evt.EventHandlerType, this, handler));
+        }
+
+        public void OnTextInput(object sender, EventArgs args) {
+            var type = args.GetType();
+            var key = (Keys) type.GetProperty("Key").GetValue(args);
+            var character = (char) type.GetProperty("Character").GetValue(args);
+            this.callback.Invoke(sender, key, character);
+        }
+
+        public delegate void TextInputCallback(object sender, Keys key, char character);
+
+    }
+}
\ No newline at end of file