add InputButton.ToSButton() extension

docs/release-notes.md

@@ -4,8 +4,10 @@
   * Fixed compatibility check crashing for players with Stardew Valley 1.08.
 
 * For modders:
-  * The reflection API now works with public code to simplify mod integrations.
-  * Fixed `e.SuppressButton()` in input events not correctly suppressing keyboard buttons.
+  * Added support for public code in reflection API, to simplify mod integrations.
+  * Improved input events:
+    * Added `ToSButton()` extension for the game's `Game1.options` button type.
+    * Fixed `e.SuppressButton()` not correctly suppressing keyboard buttons.
   * Fixed mods which implement `IAssetLoader` directly not being allowed to load files due to incorrect conflict detection.
   * Fixed SMAPI blocking reflection access to vanilla members on overridden types.
 

src/SMAPI/SButton.cs

@@ -615,6 +615,18 @@ namespace StardewModdingAPI
             return (SButton)(SButtonExtensions.ControllerOffset + key);
         }
 
+        /// <summary>Get the <see cref="SButton"/> equivalent for the given button.</summary>
+        /// <param name="input">The Stardew Valley button to convert.</param>
+        internal static SButton ToSButton(this InputButton input)
+        {
+            // derived from InputButton constructors
+            if (input.mouseLeft)
+                return SButton.MouseLeft;
+            if (input.mouseRight)
+                return SButton.MouseRight;
+            return input.key.ToSButton();
+        }
+
         /// <summary>Get the <see cref="Keys"/> equivalent for the given button.</summary>
         /// <param name="input">The button to convert.</param>
         /// <param name="key">The keyboard equivalent.</param>