PreCachingLinearLayoutManager

class PreCachingLinearLayoutManager : LinearLayoutManager {

    companion object {
        val DEFAULT_EXTRA_LAYOUT_SPACE = 600
    }

    var extraLayoutSpace = -1
    private var  context: Context

    constructor(context: Context) : super(context) {
        this.context = context
    }

    constructor(context: Context, extraLayoutSpace: Int) : super(context) {
        this.context = context
        this.extraLayoutSpace = extraLayoutSpace
    }

    constructor(context: Context, orientation: Int, reverseLayout: Boolean) : super(context, orientation, reverseLayout) {
        this.context = context
    }

    override fun getExtraLayoutSpace(state: RecyclerView.State): Int {
        if (extraLayoutSpace > 0) {
            return extraLayoutSpace
        }
        return DEFAULT_EXTRA_LAYOUT_SPACE
    }
}