Method init

src/keypresscatcher.cpp:152–185

}

bool KeyPressCatcher::init()
{
    CGEventMask modifiersPressedMask = CGEventMaskBit(kCGEventFlagsChanged);

    m_eventTapPtr = CGEventTapCreate(kCGSessionEventTap, kCGHeadInsertEventTap, kCGEventTapOptionDefault, modifiersPressedMask,
                        [] (CGEventTapProxy, CGEventType type, CGEventRef event, void *keyPressCatcherRawPtr)
                        {            
                           auto catcher = static_cast<KeyPressCatcher *>(keyPressCatcherRawPtr);
                           CGEventFlags flags = CGEventGetFlags(event);
                           auto secondTriggerKey = catcher->getSecondShortcutKey();
                           // Checking whether a second key that we expected (depending on configuration) was pressed
                           auto second_key_pressed_down = ((secondTriggerKey == CS::SecondShortcutKeyEnum::GlobalFN && flags & kCGEventFlagMaskSecondaryFn) ||
                                                          (secondTriggerKey == CS::SecondShortcutKeyEnum::Control && flags & kCGEventFlagMaskControl) ||
                                                          (secondTriggerKey == CS::SecondShortcutKeyEnum::Option && flags & kCGEventFlagMaskAlternate) ||
                                                          (secondTriggerKey == CS::SecondShortcutKeyEnum::Command && flags & kCGEventFlagMaskCommand) ||
                                                          (secondTriggerKey == CS::SecondShortcutKeyEnum::Nothing));

                           // If Shift and second key were pressed (released)
                           catcher->handleModifierKeysStatusChange((flags & kCGEventFlagMaskShift), second_key_pressed_down);
                           return event;
                        }, this);

    if (m_eventTapPtr == nullptr)
    {
       return false;
    }

    CFRunLoopAddSource(CFRunLoopGetCurrent(),
                       CFMachPortCreateRunLoopSource(kCFAllocatorDefault, m_eventTapPtr, 0),
                       kCFRunLoopCommonModes);

     CGEventTapEnable(m_eventTapPtr, true);
     return true;
}