speech-rule-engine/js/audio/abstract_audio_renderer.js

A standalone speech rule engine for XML structures, based on the original engine from ChromeVox.

import { Engine } from '../common/engine.js';
export class AbstractAudioRenderer {
    constructor() {
        this.separator_ = ' ';
    }
    set separator(sep) {
        this.separator_ = sep;
    }
    get separator() {
        return Engine.getInstance().options.modality === 'braille'
            ? ''
            : this.separator_;
    }
    error(_key) {
        return null;
    }
    merge(spans) {
        let str = '';
        const len = spans.length - 1;
        for (let i = 0, span; (span = spans[i]); i++) {
            str += span.speech;
            if (i < len) {
                const sep = span.attributes['separator'];
                str += sep !== undefined ? sep : this.separator;
            }
        }
        return str;
    }
    finalize(str) {
        return str;
    }
    pauseValue(value) {
        let numeric;
        switch (value) {
            case 'long':
                numeric = 750;
                break;
            case 'medium':
                numeric = 500;
                break;
            case 'short':
                numeric = 250;
                break;
            default:
                numeric = parseInt(value, 10);
        }
        return Math.floor((numeric * Engine.getInstance().getRate()) / 100);
    }
}
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