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

JBrowse 2 wiggle adapters, tracks, etc.

import FeatureRendererType from '@jbrowse/core/pluggableElementTypes/renderers/FeatureRendererType';
import { renderToAbstractCanvas, updateStatus } from '@jbrowse/core/util';
export default class WiggleBaseRenderer extends FeatureRendererType {
    constructor() {
        super(...arguments);
        this.supportsSVG = true;
    }
    async render(renderProps) {
        const features = await this.getFeatures(renderProps);
        const { inverted, height, regions, bpPerPx, statusCallback = () => { }, } = renderProps;
        const region = regions[0];
        const width = (region.end - region.start) / bpPerPx;
        const { reducedFeatures, ...rest } = await updateStatus('Rendering plot', statusCallback, () => renderToAbstractCanvas(width, height, renderProps, ctx => this.draw(ctx, {
            ...renderProps,
            features,
            inverted,
        })));
        const results = await super.render({
            ...renderProps,
            ...rest,
            features,
            height,
            width,
        });
        return {
            ...results,
            ...rest,
            features: reducedFeatures
                ? new Map(reducedFeatures.map(r => [r.id(), r]))
                : results.features,
            height,
            width,
            containsNoTransferables: true,
        };
    }
}