From: Gustavo Noronha Silva <gust...@noronha.dev.br> Applications such as Gnome may use Alt-Tab and Super-Tab for different purposes, some use Ctrl-arrows so we want to allow qemu to handle everything when it captures the mouse/keyboard.
However, Mac OS handles some combos like Command-Tab and Ctrl-arrows at an earlier part of the event handling chain, not letting qemu see it. We add a global Event Tap that allows qemu to see all events when the mouse is grabbed. Note that this requires additional permissions. See: https://developer.apple.com/documentation/coregraphics/1454426-cgeventtapcreate?language=objc#discussion https://support.apple.com/en-in/guide/mac-help/mh32356/mac Acked-by: Markus Armbruster <arm...@redhat.com> Signed-off-by: Gustavo Noronha Silva <gust...@noronha.dev.br> Message-Id: <20210713213200.2547-2-gust...@noronha.dev.br> Signed-off-by: Akihiko Odaki <akihiko.od...@gmail.com> Message-Id: <20220306121119.45631-2-akihiko.od...@gmail.com> Reviewed-by: Will Cohen <wwco...@gmail.com> Signed-off-by: Philippe Mathieu-Daudé <f4...@amsat.org> --- qapi/ui.json | 8 +++++- qemu-options.hx | 3 +++ ui/cocoa.m | 65 ++++++++++++++++++++++++++++++++++++++++++++++++- 3 files changed, 74 insertions(+), 2 deletions(-) diff --git a/qapi/ui.json b/qapi/ui.json index 4dea35a819..1d60d5fc78 100644 --- a/qapi/ui.json +++ b/qapi/ui.json @@ -1270,11 +1270,17 @@ # host without sending this key to the guest when # "off". Defaults to "on" # +# @full-grab: Capture all key presses, including system combos. This +# requires accessibility permissions, since it performs +# a global grab on key events. (default: off) +# See https://support.apple.com/en-in/guide/mac-help/mh32356/mac +# # Since: 7.0 ## { 'struct': 'DisplayCocoa', 'data': { - '*left-command-key': 'bool' + '*left-command-key': 'bool', + '*full-grab': 'bool' } } ## diff --git a/qemu-options.hx b/qemu-options.hx index f464b2fe27..4395378bb8 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -1916,6 +1916,9 @@ DEF("display", HAS_ARG, QEMU_OPTION_display, #if defined(CONFIG_CURSES) "-display curses[,charset=<encoding>]\n" #endif +#if defined(CONFIG_COCOA) + "-display cocoa[,full_grab=on|off]\n" +#endif #if defined(CONFIG_OPENGL) "-display egl-headless[,rendernode=<file>]\n" #endif diff --git a/ui/cocoa.m b/ui/cocoa.m index d20c74d938..b1250b7408 100644 --- a/ui/cocoa.m +++ b/ui/cocoa.m @@ -309,11 +309,13 @@ static void handleAnyDeviceErrors(Error * err) BOOL isMouseGrabbed; BOOL isFullscreen; BOOL isAbsoluteEnabled; + CFMachPortRef eventsTap; } - (void) switchSurface:(pixman_image_t *)image; - (void) grabMouse; - (void) ungrabMouse; - (void) toggleFullScreen:(id)sender; +- (void) setFullGrab:(id)sender; - (void) handleMonitorInput:(NSEvent *)event; - (bool) handleEvent:(NSEvent *)event; - (bool) handleEventLocked:(NSEvent *)event; @@ -336,6 +338,19 @@ static void handleAnyDeviceErrors(Error * err) QemuCocoaView *cocoaView; +static CGEventRef handleTapEvent(CGEventTapProxy proxy, CGEventType type, CGEventRef cgEvent, void *userInfo) +{ + QemuCocoaView *cocoaView = userInfo; + NSEvent *event = [NSEvent eventWithCGEvent:cgEvent]; + if ([cocoaView isMouseGrabbed] && [cocoaView handleEvent:event]) { + COCOA_DEBUG("Global events tap: qemu handled the event, capturing!\n"); + return NULL; + } + COCOA_DEBUG("Global events tap: qemu did not handle the event, letting it through...\n"); + + return cgEvent; +} + @implementation QemuCocoaView - (id)initWithFrame:(NSRect)frameRect { @@ -361,6 +376,11 @@ QemuCocoaView *cocoaView; } qkbd_state_free(kbd); + + if (eventsTap) { + CFRelease(eventsTap); + } + [super dealloc]; } @@ -655,6 +675,36 @@ QemuCocoaView *cocoaView; } } +- (void) setFullGrab:(id)sender +{ + COCOA_DEBUG("QemuCocoaView: setFullGrab\n"); + + CGEventMask mask = CGEventMaskBit(kCGEventKeyDown) | CGEventMaskBit(kCGEventKeyUp) | CGEventMaskBit(kCGEventFlagsChanged); + eventsTap = CGEventTapCreate(kCGHIDEventTap, kCGHeadInsertEventTap, kCGEventTapOptionDefault, + mask, handleTapEvent, self); + if (!eventsTap) { + warn_report("Could not create event tap, system key combos will not be captured.\n"); + return; + } else { + COCOA_DEBUG("Global events tap created! Will capture system key combos.\n"); + } + + CFRunLoopRef runLoop = CFRunLoopGetCurrent(); + if (!runLoop) { + warn_report("Could not obtain current CF RunLoop, system key combos will not be captured.\n"); + return; + } + + CFRunLoopSourceRef tapEventsSrc = CFMachPortCreateRunLoopSource(kCFAllocatorDefault, eventsTap, 0); + if (!tapEventsSrc ) { + warn_report("Could not obtain current CF RunLoop, system key combos will not be captured.\n"); + return; + } + + CFRunLoopAddSource(runLoop, tapEventsSrc, kCFRunLoopDefaultMode); + CFRelease(tapEventsSrc); +} + - (void) toggleKey: (int)keycode { qkbd_state_key_event(kbd, keycode, !qkbd_state_key_get(kbd, keycode)); } @@ -1281,6 +1331,13 @@ QemuCocoaView *cocoaView; [cocoaView toggleFullScreen:sender]; } +- (void) setFullGrab:(id)sender +{ + COCOA_DEBUG("QemuCocoaAppController: setFullGrab\n"); + + [cocoaView setFullGrab:sender]; +} + /* Tries to find then open the specified filename */ - (void) openDocumentation: (NSString *) filename { @@ -1994,11 +2051,17 @@ static void cocoa_display_init(DisplayState *ds, DisplayOptions *opts) qemu_sem_wait(&app_started_sem); COCOA_DEBUG("cocoa_display_init: app start completed\n"); + QemuCocoaAppController *controller = (QemuCocoaAppController *)[[NSApplication sharedApplication] delegate]; /* if fullscreen mode is to be used */ if (opts->has_full_screen && opts->full_screen) { dispatch_async(dispatch_get_main_queue(), ^{ [NSApp activateIgnoringOtherApps: YES]; - [(QemuCocoaAppController *)[[NSApplication sharedApplication] delegate] toggleFullScreen: nil]; + [controller toggleFullScreen: nil]; + }); + } + if (opts->u.cocoa.has_full_grab && opts->u.cocoa.full_grab) { + dispatch_async(dispatch_get_main_queue(), ^{ + [controller setFullGrab: nil]; }); } -- 2.34.1
