Insets

object InsetsUtils {

    fun View.doOnApplyWindowInsets(block: (View, WindowInsetsCompat, Rect) -> WindowInsetsCompat) {
        val initialPadding = getCurrentPadding(this)

        ViewCompat.setOnApplyWindowInsetsListener(this) { v, insets ->
            block(v, insets, initialPadding)
        }

        requestApplyInsetsWhenAttached()
    }

    private fun View.requestApplyInsetsWhenAttached() {
        if (isAttachedToWindow) {
            requestApplyInsets()
        } else {
            addOnAttachStateChangeListener(object : View.OnAttachStateChangeListener {
                override fun onViewDetachedFromWindow(v: View) {
                    v.removeOnAttachStateChangeListener(this)
                    v.requestApplyInsets()
                }

                override fun onViewAttachedToWindow(v: View?) {
                }
            })
        }
    }

    private fun getCurrentPadding(view: View): Rect {
        return Rect(view.paddingLeft, view.paddingTop, view.paddingRight, view.paddingBottom)
    }
}