package eu.kanade.tachiyomi.widget

import androidx.viewpager.widget.PagerAdapter
import android.view.View
import android.view.ViewGroup

abstract class ViewPagerAdapter : PagerAdapter() {

    protected abstract fun createView(container: ViewGroup, position: Int): View

    protected open fun destroyView(container: ViewGroup, position: Int, view: View) {
    }

    override fun instantiateItem(container: ViewGroup, position: Int): Any {
        val view = createView(container, position)
        container.addView(view)
        return view
    }

    override fun destroyItem(container: ViewGroup, position: Int, obj: Any) {
        val view = obj as View
        destroyView(container, position, view)
        container.removeView(view)
    }

    override fun isViewFromObject(view: View, obj: Any): Boolean {
        return view === obj
    }

    interface PositionableView {
        val item: Any
    }

}