Function aria

libs/echarts/echarts.simple.js:25250–25394

(dom, ecModel)

*/

var aria = function (dom, ecModel) {
    var ariaModel = ecModel.getModel('aria');
    if (!ariaModel.get('show')) {
        return;
    }
    else if (ariaModel.get('description')) {
        dom.setAttribute('aria-label', ariaModel.get('description'));
        return;
    }

    var seriesCnt = 0;
    ecModel.eachSeries(function (seriesModel, idx) {
        ++seriesCnt;
    }, this);

    var maxDataCnt = ariaModel.get('data.maxCount') || 10;
    var maxSeriesCnt = ariaModel.get('series.maxCount') || 10;
    var displaySeriesCnt = Math.min(seriesCnt, maxSeriesCnt);

    var ariaLabel;
    if (seriesCnt < 1) {
        // No series, no aria label
        return;
    }
    else {
        var title = getTitle();
        if (title) {
            ariaLabel = replace(getConfig('general.withTitle'), {
                title: title
            });
        }
        else {
            ariaLabel = getConfig('general.withoutTitle');
        }

        var seriesLabels = [];
        var prefix = seriesCnt > 1
            ? 'series.multiple.prefix'
            : 'series.single.prefix';
        ariaLabel += replace(getConfig(prefix), { seriesCount: seriesCnt });

        ecModel.eachSeries(function (seriesModel, idx) {
            if (idx < displaySeriesCnt) {
                var seriesLabel;

                var seriesName = seriesModel.get('name');
                var seriesTpl = 'series.'
                    + (seriesCnt > 1 ? 'multiple' : 'single') + '.';
                seriesLabel = getConfig(seriesName
                    ? seriesTpl + 'withName'
                    : seriesTpl + 'withoutName');

                seriesLabel = replace(seriesLabel, {
                    seriesId: seriesModel.seriesIndex,
                    seriesName: seriesModel.get('name'),
                    seriesType: getSeriesTypeName(seriesModel.subType)
                });