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

MusicXML to Vexflow

import { Point, Rect } from '../spatial';
import { Label } from './label';
import { TextMeasurer } from './textmeasurer';
export class PartLabelGroup {
    config;
    log;
    document;
    key;
    position;
    partRenders;
    constructor(config, log, document, key, position, partRenders) {
        this.config = config;
        this.log = log;
        this.document = document;
        this.key = key;
        this.position = position;
        this.partRenders = partRenders;
    }
    render() {
        const partLabelRenders = this.renderPartLabels();
        const rect = Rect.merge(partLabelRenders.map((partLabel) => partLabel.rect));
        return {
            type: 'partlabelgroup',
            rect,
            partLabelRenders,
        };
    }
    renderPartLabels() {
        const partLabelRenders = new Array();
        const partCount = this.document.getPartCount(this.key);
        const positions = this.getPartLabelPositions();
        const padding = this.getPartLabelPadding();
        const font = this.getPartLabelFont();
        for (let partIndex = 0; partIndex < partCount; partIndex++) {
            const key = { ...this.key, partIndex };
            const text = this.document.getPartLabel(key);
            const position = positions.at(partIndex) ?? this.position;
            const label = Label.singleLine(this.config, this.log, text, position, padding, font);
            partLabelRenders.push({ type: 'partLabel', key, rect: label.rect, label });
        }
        return partLabelRenders;
    }
    getPartLabelPositions() {
        const positions = new Array();
        const partCount = this.document.getPartCount(this.key);
        const textMeasurer = new TextMeasurer(this.getPartLabelFont());
        for (let partIndex = 0; partIndex < partCount; partIndex++) {
            const partLabel = this.document.getPartLabel({ ...this.key, partIndex });
            const staveRenders = this.partRenders?.at(partIndex)?.staveRenders;
            const staveCount = staveRenders?.length ?? 0;
            if (staveCount > 0) {
                const top = staveRenders.at(0).intrinsicRect.top();
                const bottom = staveRenders.at(-1).intrinsicRect.bottom();
                const middle = (top + bottom) / 2;
                const height = textMeasurer.measure(partLabel).approximateHeight;
                positions.push(new Point(this.position.x, middle + height / 2));
            }
            else {
                // If there's no part render to use, just use the position of the part label group. We'll correct it later.
                positions.push(this.position);
            }
        }
        return positions;
    }
    getPartLabelPadding() {
        return { right: this.config.PART_LABEL_PADDING_RIGHT };
    }
    getPartLabelFont() {
        return {
            color: 'black',
            family: this.config.PART_LABEL_FONT_FAMILY,
            size: this.config.PART_LABEL_FONT_SIZE,
        };
    }
}