ViewPager that wraps its content's height

HeightWrappingViewPager.kt

import android.content.Context
import android.support.v4.view.ViewPager
import android.util.AttributeSet

internal class HeightWrappingViewPager @JvmOverloads constructor(context: Context, attrs: AttributeSet? = null)
    : ViewPager(context, attrs) {

    override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {
        var heightMeasureSpecModif = heightMeasureSpec

        var height = 0
        for (i in 0 until childCount) {
            val child = getChildAt(i)
            child.measure(widthMeasureSpec, MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED))
            val h = child.measuredHeight
            if (h > height) height = h
        }

        if (height != 0) {
            heightMeasureSpecModif = MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY)
        }

        super.onMeasure(widthMeasureSpec, heightMeasureSpecModif)
    }
}