espanso/native/libmacbridge/AppDelegate.mm

#import "AppDelegate.h"

@implementation AppDelegate

// 10.9+ only, see this url for compatibility:
// http://stackoverflow.com/questions/17693408/enable-access-for-assistive-devices-programmatically-on-10-9
BOOL checkAccessibility()
{
    NSDictionary* opts = @{(__bridge id)kAXTrustedCheckOptionPrompt: @YES};
    return AXIsProcessTrustedWithOptions((__bridge CFDictionaryRef)opts);
}

- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
    if (checkAccessibility()) {
        NSLog(@"Accessibility Enabled");
    }else {
        NSLog(@"Accessibility Disabled");
    }

    NSLog(@"registering keydown mask");
    [NSEvent addGlobalMonitorForEventsMatchingMask:(NSEventMaskKeyDown | NSEventMaskFlagsChanged)
            handler:^(NSEvent *event){
        if (event.type == NSEventTypeKeyDown
            && event.keyCode != 0x33) { // Send backspace as a modifier

            const char * chars = [event.characters UTF8String];
            int len = event.characters.length;

            keypress_callback(context_instance, chars, len, 0, event.keyCode);
            //NSLog(@"keydown: %@, %d", event.characters, event.keyCode);
        }else{
            // Because this event is triggered for both the press and release of a modifier, trigger the callback
            // only on release
            if (([event modifierFlags] & (NSEventModifierFlagShift | NSEventModifierFlagCommand |
                NSEventModifierFlagControl | NSEventModifierFlagOption)) == 0) {

                keypress_callback(context_instance, NULL, 0, 1, event.keyCode);
            }

            //NSLog(@"keydown: %d", event.keyCode);
        }
    }];
}

@end