package org.ccci.gto.android.common.util;

import android.os.Build;
import android.view.View;

import java.util.concurrent.atomic.AtomicInteger;

public final class ViewCompat {
    private static final AtomicInteger sNextGeneratedId = new AtomicInteger(1);

    public static int generateViewId() {
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR1) {
            while (true) {
                final int result = sNextGeneratedId.get();
                // aapt-generated IDs have the high byte nonzero; clamp to the range under that.
                int newValue = result + 1;
                if (newValue > 0x00FFFFFF) {
                    newValue = 1; // Roll over to 1, not 0.
                }
                if (sNextGeneratedId.compareAndSet(result, newValue)) {
                    return result;
                }
            }
        } else {
            return View.generateViewId();
        }
    }
}

implement ViewCompat.generateViewId for backwards compatibility