#2

private class func handlePan(_ recognizer: UIPanGestureRecognizer) {
        switch recognizer.state {
        case .began:
            panStartY = recognizer.location(in: appDelegateWindow).y
            panPeviousY = panStartY
            panShouldIgnoreEndedState = true
            keyboardStartY = keyboardFrame.origin.y
            textEffectsView.window!.isUserInteractionEnabled = false
            remoteView?.window?.isUserInteractionEnabled = false
        case .changed:
            let distance = keyboardStartY - panStartY
            let currentY = recognizer.location(in: appDelegateWindow).y
            let deltaY = currentY - distance - panStartY
            let adjustment = min(max(keyboardStartY + deltaY, calculatedKeyboardStartY), appDelegateWindow.frame.height)
            keyboardFrame.origin.y = adjustment
            panIsMovingDown = currentY > panPeviousY
            panPeviousY = currentY
            panShouldIgnoreEndedState = deltaY <= 0
        case .ended:
            if panShouldIgnoreEndedState {
                return
            }
            panGestureRecognizer.isEnabled = false
            textEffectsView.window!.isUserInteractionEnabled = true
            remoteView?.window?.isUserInteractionEnabled = true

            let initialFrame = keyboardFrame
            var finalFrame = initialFrame
            finalFrame.origin.y = panIsMovingDown ? appDelegateWindow.frame.height : calculatedKeyboardStartY

            UIView.animate(withDuration: defaultAnimationDuration, delay: 0, options: defaultAnimationCurve, animations: {
                keyboardFrame = finalFrame
            }, completion: { _ in
                panGestureRecognizer.isEnabled = true

                delegateKeyboardDidHide(KSKeyboardInfo(initialFrame: initialFrame, finalFrame: finalFrame))

                textEffectsView.isHidden = true
                remoteView?.window?.isHidden = true
                appDelegateWindow.endEditing(true)
            })
        case .cancelled, .failed:
            textEffectsView.window!.isUserInteractionEnabled = true
            remoteView?.window?.isUserInteractionEnabled = true
            keyboardFrame.origin.y = calculatedKeyboardStartY
        default:
            ()
        }
    }