@stringsync/vexml/dist/esm/rendering/octaveshift.js

MusicXML to Vexflow

import * as vexflow from 'vexflow';
import * as util from '../util';
import { Rect } from '../spatial';
export class OctaveShift {
    config;
    log;
    document;
    key;
    registry;
    constructor(config, log, document, key, registry) {
        this.config = config;
        this.log = log;
        this.document = document;
        this.key = key;
        this.registry = registry;
    }
    render() {
        const octaveShift = this.document.getOctaveShift(this.key);
        const renders = this.registry.get(octaveShift.id).filter((r) => r.type === 'note' || r.type === 'rest');
        const vexflowTextBrackets = this.renderVexflowTextBrackets(renders);
        return {
            type: 'octaveshift',
            key: this.key,
            rect: Rect.empty(),
            vexflowTextBrackets,
        };
    }
    renderVexflowTextBrackets(renders) {
        if (renders.length < 2) {
            this.log.warn('cannot render octave shift with less than 2 notes, skipping', {
                octaveShiftIndex: this.key.octaveShiftIndex,
            });
            return [];
        }
        const vexflowTextBrackets = new Array();
        const systemIndexes = util.unique(renders.map((n) => n.key.systemIndex));
        for (const systemIndex of systemIndexes) {
            const systemNoteRenders = renders.filter((n) => n.key.systemIndex === systemIndex);
            if (systemNoteRenders.length > 1) {
                const vexflowTextBracket = this.renderVexflowTextBracket(systemNoteRenders);
                vexflowTextBrackets.push(vexflowTextBracket);
            }
        }
        return vexflowTextBrackets;
    }
    renderVexflowTextBracket(renders) {
        const octaveShift = this.document.getOctaveShift(this.key);
        const start = renders.at(0).vexflowNote;
        const stop = renders.at(-1).vexflowNote;
        const text = Math.abs(octaveShift.size).toString();
        let position;
        if (octaveShift.size < 0) {
            position = vexflow.TextBracketPosition.TOP;
        }
        else {
            position = vexflow.TextBracketPosition.BOTTOM;
        }
        let superscript;
        if (octaveShift.size < 0) {
            superscript = 'va';
        }
        else {
            superscript = 'mb';
        }
        return new vexflow.TextBracket({
            start,
            stop,
            text,
            superscript,
            position,
        });
    }
}