From: Gustavo Noronha Silva <gust...@noronha.dev.br>

On Mac OS X the Option key maps to Alt and Command to Super/Meta. This change
swaps them around so that Alt is the key closer to the space bar and Meta/Super
is between Control and Alt, like on non-Mac keyboards.

It is a cocoa display option, disabled by default.

Acked-by: Markus Armbruster <arm...@redhat.com>
Signed-off-by: Gustavo Noronha Silva <gust...@noronha.dev.br>
Message-Id: <20210713213200.2547-3-gust...@noronha.dev.br>
Signed-off-by: Akihiko Odaki <akihiko.od...@gmail.com>
---
 qapi/ui.json    |  7 ++++++-
 qemu-options.hx |  2 +-
 ui/cocoa.m      | 46 ++++++++++++++++++++++++++++++++++++++--------
 3 files changed, 45 insertions(+), 10 deletions(-)

diff --git a/qapi/ui.json b/qapi/ui.json
index ff0a04da792..e28339887e0 100644
--- a/qapi/ui.json
+++ b/qapi/ui.json
@@ -1270,10 +1270,15 @@
 #             a global grab on key events. (default: off)
 #             See https://support.apple.com/en-in/guide/mac-help/mh32356/mac
 #
+# @swap-opt-cmd: Swap the Option and Command keys so that their key codes match
+#                their position on non-Mac keyboards and you can use Meta/Super
+#                and Alt where you expect them. (default: off)
+#
 # Since: 7.0
 ##
 { 'struct'  : 'DisplayCocoa',
-  'data'    : { '*full-grab'     : 'bool' } }
+  'data'    : { '*full-grab'           : 'bool',
+                '*swap-opt-cmd' : 'bool' } }
 
 ##
 # @DisplayType:
diff --git a/qemu-options.hx b/qemu-options.hx
index 4df9ccc3446..b57cbcb2c9e 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -1917,7 +1917,7 @@ DEF("display", HAS_ARG, QEMU_OPTION_display,
     "-display curses[,charset=<encoding>]\n"
 #endif
 #if defined(CONFIG_COCOA)
-    "-display cocoa[,full_grab=on|off]\n"
+    "-display cocoa[,full-grab=on|off][,swap-opt-cmd=on|off]\n"
 #endif
 #if defined(CONFIG_OPENGL)
     "-display egl-headless[,rendernode=<file>]\n"
diff --git a/ui/cocoa.m b/ui/cocoa.m
index bfd602a96b9..ab9de404687 100644
--- a/ui/cocoa.m
+++ b/ui/cocoa.m
@@ -95,6 +95,7 @@ static void cocoa_switch(DisplayChangeListener *dcl,
 };
 static int last_buttons;
 static int cursor_hide = 1;
+static bool swap_opt_cmd;
 
 static int gArgc;
 static char **gArgv;
@@ -853,12 +854,22 @@ - (bool) handleEventLocked:(NSEvent *)event
         qkbd_state_key_event(kbd, Q_KEY_CODE_CTRL_R, false);
     }
     if (!(modifiers & NSEventModifierFlagOption)) {
-        qkbd_state_key_event(kbd, Q_KEY_CODE_ALT, false);
-        qkbd_state_key_event(kbd, Q_KEY_CODE_ALT_R, false);
+        if (swap_opt_cmd) {
+            qkbd_state_key_event(kbd, Q_KEY_CODE_META_L, false);
+            qkbd_state_key_event(kbd, Q_KEY_CODE_META_R, false);
+        } else {
+            qkbd_state_key_event(kbd, Q_KEY_CODE_ALT, false);
+            qkbd_state_key_event(kbd, Q_KEY_CODE_ALT_R, false);
+        }
     }
     if (!(modifiers & NSEventModifierFlagCommand)) {
-        qkbd_state_key_event(kbd, Q_KEY_CODE_META_L, false);
-        qkbd_state_key_event(kbd, Q_KEY_CODE_META_R, false);
+        if (swap_opt_cmd) {
+            qkbd_state_key_event(kbd, Q_KEY_CODE_ALT, false);
+            qkbd_state_key_event(kbd, Q_KEY_CODE_ALT_R, false);
+        } else {
+            qkbd_state_key_event(kbd, Q_KEY_CODE_META_L, false);
+            qkbd_state_key_event(kbd, Q_KEY_CODE_META_R, false);
+        }
     }
 
     switch ([event type]) {
@@ -890,13 +901,21 @@ - (bool) handleEventLocked:(NSEvent *)event
 
                 case kVK_Option:
                     if (!!(modifiers & NSEventModifierFlagOption)) {
-                        [self toggleKey:Q_KEY_CODE_ALT];
+                        if (swap_opt_cmd) {
+                            [self toggleKey:Q_KEY_CODE_META_L];
+                        } else {
+                            [self toggleKey:Q_KEY_CODE_ALT];
+                        }
                     }
                     break;
 
                 case kVK_RightOption:
                     if (!!(modifiers & NSEventModifierFlagOption)) {
-                        [self toggleKey:Q_KEY_CODE_ALT_R];
+                        if (swap_opt_cmd) {
+                            [self toggleKey:Q_KEY_CODE_META_R];
+                        } else {
+                            [self toggleKey:Q_KEY_CODE_ALT_R];
+                        }
                     }
                     break;
 
@@ -904,14 +923,22 @@ - (bool) handleEventLocked:(NSEvent *)event
                 case kVK_Command:
                     if (isMouseGrabbed &&
                         !!(modifiers & NSEventModifierFlagCommand)) {
-                        [self toggleKey:Q_KEY_CODE_META_L];
+                        if (swap_opt_cmd) {
+                            [self toggleKey:Q_KEY_CODE_ALT];
+                        } else {
+                            [self toggleKey:Q_KEY_CODE_META_L];
+                        }
                     }
                     break;
 
                 case kVK_RightCommand:
                     if (isMouseGrabbed &&
                         !!(modifiers & NSEventModifierFlagCommand)) {
-                        [self toggleKey:Q_KEY_CODE_META_R];
+                        if (swap_opt_cmd) {
+                            [self toggleKey:Q_KEY_CODE_ALT_R];
+                        } else {
+                            [self toggleKey:Q_KEY_CODE_META_R];
+                        }
                     }
                     break;
             }
@@ -2130,6 +2157,9 @@ static void cocoa_display_init(DisplayState *ds, 
DisplayOptions *opts)
     if (opts->has_show_cursor && opts->show_cursor) {
         cursor_hide = 0;
     }
+    if (opts->u.cocoa.has_swap_opt_cmd) {
+        swap_opt_cmd = opts->u.cocoa.swap_opt_cmd;
+    }
 
     // register vga output callbacks
     register_displaychangelistener(&dcl);
-- 
2.32.0 (Apple Git-132)


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