src/chart/helper/enableAriaDecalForTree.ts

/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements.  See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership.  The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License.  You may obtain a copy of the License at
*
*   http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied.  See the License for the
* specific language governing permissions and limitations
* under the License.
*/

import SeriesModel from '../../model/Series';
import {Dictionary, DecalObject} from '../../util/types';
import { getDecalFromPalette } from '../../model/mixin/palette';

export default function enableAriaDecalForTree(seriesModel: SeriesModel) {
    const data = seriesModel.getData();
    const tree = data.tree;
    const decalPaletteScope: Dictionary<DecalObject> = {};

    tree.eachNode(node => {
        // Use decal of level 1 node
        let current = node;
        while (current && current.depth > 1) {
            current = current.parentNode;
        }

        const decal = getDecalFromPalette(
            seriesModel.ecModel,
            current.name || current.dataIndex + '',
            decalPaletteScope
        );
        node.setVisual('decal', decal);
    });
}