@stringsync/vexml/dist/esm/formatting/maxmeasureformatter.js

MusicXML to Vexflow

import * as util from '../util';
import { DEFAULT_CONFIG } from '../config';
import { NoopLogger } from '../debug';
/**
 * A formatter that limits the number of measures per system.
 */
export class MaxMeasureFormatter {
    maxMeasuresPerSystemCount;
    config;
    log;
    constructor(maxMeasuresPerSystemCount, opts) {
        this.maxMeasuresPerSystemCount = maxMeasuresPerSystemCount;
        this.config = { ...DEFAULT_CONFIG, ...opts?.config };
        this.log = opts?.logger ?? new NoopLogger();
        util.assert(maxMeasuresPerSystemCount > 0, 'maxMeasuresPerSystemCount must be greater than 0');
    }
    format(document) {
        const clone = document.clone();
        const measures = clone.score.systems.flatMap((system) => system.measures);
        clone.score.systems = [];
        for (let index = 0; index < measures.length; index += this.maxMeasuresPerSystemCount) {
            const systemMeasures = measures.slice(index, index + this.maxMeasuresPerSystemCount);
            clone.score.systems.push({ type: 'system', measures: systemMeasures });
        }
        return clone;
    }
}