@stringsync/vexml/dist/esm/parsing/musicxml/textstatemachine.js

MusicXML to Vexflow

/** A state machine for calculating the text that should come from a <lyric> element. */
export class TextStateMachine {
    state = 'INITIAL';
    parts = new Array();
    process(component) {
        switch (this.state) {
            case 'INITIAL':
                this.processInitial(component);
                break;
            case 'IN_SYLLABLE':
                this.processInSyllable(component);
                break;
            case 'AFTER_SYLLABLE':
                this.processAfterSyllable(component);
                break;
        }
    }
    getText() {
        return this.parts.join('');
    }
    processInitial(component) {
        switch (component.type) {
            case 'syllabic':
                switch (component.value) {
                    case 'begin':
                    case 'middle':
                        this.state = 'IN_SYLLABLE';
                        break;
                }
                break;
            case 'text':
                this.parts.push(component.value);
                break;
        }
    }
    processInSyllable(component) {
        switch (component.type) {
            case 'syllabic':
                switch (component.value) {
                    case 'single':
                    case 'end':
                        this.state = 'AFTER_SYLLABLE';
                        break;
                }
                break;
            case 'text':
                this.parts.push(component.value);
                break;
        }
    }
    processAfterSyllable(component) {
        switch (component.type) {
            case 'elision':
                this.parts.push(component.value);
                this.state = 'INITIAL';
                break;
        }
    }
}