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#include <Carbon/Carbon.h>
struct carbon_event
{
EventTargetRef target;
EventHandlerUPP handler;
EventTypeSpec type;
EventHandlerRef handler_ref;
char * volatile process_name;
};
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated"
static OSStatus
carbon_event_handler(EventHandlerCallRef ref, EventRef event, void *context)
{
struct carbon_event *carbon = (struct carbon_event *) context;
ProcessSerialNumber psn;
if (GetEventParameter(event,
kEventParamProcessID,
typeProcessSerialNumber,
NULL,
sizeof(psn),
NULL,
&psn) != noErr) {
return -1;
}
CFStringRef process_name_ref;
if (CopyProcessName(&psn, &process_name_ref) == noErr) {
if (carbon->process_name) free(carbon->process_name);
carbon->process_name = copy_cfstring(process_name_ref);
printf("front app changed: %s\n", carbon->process_name);
CFRelease(process_name_ref);
}
return noErr;
}
#pragma clang diagnostic pop
bool carbon_event_init(struct carbon_event *carbon)
{
carbon->target = GetApplicationEventTarget();
carbon->handler = NewEventHandlerUPP(carbon_event_handler);
carbon->type.eventClass = kEventClassApplication;
carbon->type.eventKind = kEventAppFrontSwitched;
carbon->process_name = NULL;
return InstallEventHandler(carbon->target,
carbon->handler,
1,
&carbon->type,
carbon,
&carbon->handler_ref) == noErr;
}
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