From 5f06bf80db714c1c355018cf7e3bd0e5eaa73ebe Mon Sep 17 00:00:00 2001
From: Ken Thomases <ken@codeweavers.com>
Date: Wed, 6 Feb 2013 19:32:18 -0600
Subject: [PATCH] winemac: Implement SysCommand() to prevent Alt keypresses
 from activating system menu.

---
 dlls/winemac.drv/window.c         | 30 ++++++++++++++++++++++++++++++
 dlls/winemac.drv/winemac.drv.spec |  1 +
 2 files changed, 31 insertions(+)

diff --git a/dlls/winemac.drv/window.c b/dlls/winemac.drv/window.c
index 9d639125a1b..7a7eda76dfd 100644
--- a/dlls/winemac.drv/window.c
+++ b/dlls/winemac.drv/window.c
@@ -1040,6 +1040,36 @@ done:
 }
 
 
+/***********************************************************************
+ *              SysCommand   (MACDRV.@)
+ *
+ * Perform WM_SYSCOMMAND handling.
+ */
+LRESULT CDECL macdrv_SysCommand(HWND hwnd, WPARAM wparam, LPARAM lparam)
+{
+    struct macdrv_win_data *data;
+    LRESULT ret = -1;
+
+    TRACE("%p, %x, %lx\n", hwnd, (unsigned)wparam, lparam);
+
+    if (!(data = get_win_data(hwnd))) goto done;
+    if (!data->cocoa_window || !data->on_screen) goto done;
+
+    /* prevent a simple ALT press+release from activating the system menu,
+       as that can get confusing */
+    if ((wparam & 0xfff0) == SC_KEYMENU && !(WCHAR)lparam && !GetMenu(hwnd) &&
+        (GetWindowLongW(hwnd, GWL_STYLE) & WS_SYSMENU))
+    {
+        TRACE("ignoring SC_KEYMENU wp %lx lp %lx\n", wparam, lparam);
+        ret = 0;
+    }
+
+done:
+    release_win_data(data);
+    return ret;
+}
+
+
 /***********************************************************************
  *              UpdateLayeredWindow   (MACDRV.@)
  */
diff --git a/dlls/winemac.drv/winemac.drv.spec b/dlls/winemac.drv/winemac.drv.spec
index 30df9d6165a..57b1e5a74c4 100644
--- a/dlls/winemac.drv/winemac.drv.spec
+++ b/dlls/winemac.drv/winemac.drv.spec
@@ -24,6 +24,7 @@
 @ cdecl SetWindowStyle(ptr long ptr) macdrv_SetWindowStyle
 @ cdecl SetWindowText(long wstr) macdrv_SetWindowText
 @ cdecl ShowWindow(long long ptr long) macdrv_ShowWindow
+@ cdecl SysCommand(long long long) macdrv_SysCommand
 @ cdecl ToUnicodeEx(long long ptr ptr long long long) macdrv_ToUnicodeEx
 @ cdecl UpdateLayeredWindow(long ptr ptr) macdrv_UpdateLayeredWindow
 @ cdecl VkKeyScanEx(long long) macdrv_VkKeyScanEx