@jbrowse/plugin-wiggle/esm/MultiLineRenderer/MultiLineRenderer.js

JBrowse 2 wiggle adapters, tracks, etc.

import { forEachWithStopTokenCheck, groupBy } from '@jbrowse/core/util';
import WiggleBaseRenderer from '../WiggleBaseRenderer';
export default class MultiLineRenderer extends WiggleBaseRenderer {
    async draw(ctx, props) {
        const { stopToken, sources, features } = props;
        const groups = groupBy(features.values(), f => f.get('source'));
        const { drawLine } = await import('../drawLine');
        let feats = [];
        forEachWithStopTokenCheck(sources, stopToken, source => {
            const { reducedFeatures } = drawLine(ctx, {
                ...props,
                features: groups[source.name] || [],
                colorCallback: () => source.color || 'blue',
            });
            feats = feats.concat(reducedFeatures);
        });
        return { reducedFeatures: feats };
    }
}