From 8b69cfddd34487362bb8d4f03b1f3d61763ca1b4 Mon Sep 17 00:00:00 2001
From: CJ van den Berg <cj@vdbonline.com>
Date: Sat, 25 Jan 2025 17:39:07 +0100
Subject: [PATCH] fix(win32 gui): add middle mouse support and fix right mouse
 button mapping

---
 src/win32/gui.zig | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/src/win32/gui.zig b/src/win32/gui.zig
index 71761eb..9166b53 100644
--- a/src/win32/gui.zig
+++ b/src/win32/gui.zig
@@ -638,6 +638,8 @@ fn sendMouse(
         move,
         left_down,
         left_up,
+        middle_down,
+        middle_up,
         right_down,
         right_up,
     },
@@ -676,13 +678,14 @@ fn sendMouse(
             "B",
             switch (b) {
                 .move => unreachable,
-                .left_down, .right_down => input.event.press,
-                .left_up, .right_up => input.event.release,
+                .left_down, .middle_down, .right_down => input.event.press,
+                .left_up, .middle_up, .right_up => input.event.release,
             },
             switch (b) {
                 .move => unreachable,
                 .left_down, .left_up => @intFromEnum(input.mouse.BUTTON1),
-                .right_down, .right_up => @intFromEnum(input.mouse.BUTTON2),
+                .middle_down, .middle_up => @intFromEnum(input.mouse.BUTTON2),
+                .right_down, .right_up => @intFromEnum(input.mouse.BUTTON3),
             },
             cell.cell.x,
             cell.cell.y,
@@ -1036,6 +1039,14 @@ fn WndProc(
             sendMouse(hwnd, .left_up, wparam, lparam);
             return 0;
         },
+        win32.WM_MBUTTONDOWN => {
+            sendMouse(hwnd, .middle_down, wparam, lparam);
+            return 0;
+        },
+        win32.WM_MBUTTONUP => {
+            sendMouse(hwnd, .middle_up, wparam, lparam);
+            return 0;
+        },
         win32.WM_RBUTTONDOWN => {
             sendMouse(hwnd, .right_down, wparam, lparam);
             return 0;