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Vaadin 7 compatibility package for Vaadin 8

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/*
 * Copyright (C) 2000-2023 Vaadin Ltd
 *
 * This program is available under Vaadin Commercial License and Service Terms.
 *
 * See  for the full
 * license.
 */
package com.vaadin.v7.client.ui.tree;

import com.google.gwt.user.client.ui.Widget;
import com.vaadin.client.UIDL;
import com.vaadin.client.ui.dd.VAcceptCriterion;
import com.vaadin.client.ui.dd.VDragAndDropManager;
import com.vaadin.client.ui.dd.VDragEvent;
import com.vaadin.shared.ui.dd.AcceptCriterion;
import com.vaadin.v7.client.ui.VTree;
import com.vaadin.v7.client.ui.VTree.TreeNode;
import com.vaadin.v7.ui.Tree;

@AcceptCriterion(Tree.TargetInSubtree.class)
public final class VTargetInSubtree extends VAcceptCriterion {

    @Override
    protected boolean accept(VDragEvent drag, UIDL configuration) {

        VTree tree = (VTree) VDragAndDropManager.get().getCurrentDropHandler()
                .getConnector().getWidget();
        TreeNode treeNode = tree
                .getNodeByKey((String) drag.getDropDetails().get("itemIdOver"));
        if (treeNode != null) {
            Widget parent2 = treeNode;
            int depth = configuration.getIntAttribute("depth");
            if (depth < 0) {
                depth = Integer.MAX_VALUE;
            }
            final String searchedKey = configuration.getStringAttribute("key");
            for (int i = 0; i <= depth && parent2 instanceof TreeNode; i++) {
                if (searchedKey.equals(((TreeNode) parent2).key)) {
                    return true;
                }
                // panel -> next level node
                parent2 = parent2.getParent().getParent();
            }
        }

        return false;
    }
}