@svta/common-media-library/dist/cjs/webvtt/parse/Settings.js

A common library for media playback in JavaScript

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.Settings = void 0;
// A settings object holds key/value pairs and will ignore anything but the first
// assignment to a specific key.
class Settings {
    constructor() {
        this.values = Object.create(null);
    }
    // Only accept the first assignment to any key.
    set(k, v) {
        if (this.get(k) || v === '') {
            return;
        }
        this.values[k] = v;
    }
    // Return the value for a key, or a default value.
    // If 'defaultKey' is passed then 'dflt' is assumed to be an object with
    // a number of possible default values as properties where 'defaultKey' is
    // the key of the property that will be chosen; otherwise it's assumed to be
    // a single value.
    get(k, dflt) {
        if (this.has(k)) {
            return this.values[k];
        }
        return dflt;
    }
    // Check whether we have a value for a key.
    has(k) {
        return k in this.values;
    }
    // Accept a setting if its one of the given alternatives.
    alt(k, v, a) {
        for (let n = 0; n < a.length; ++n) {
            if (v === a[n]) {
                this.set(k, v);
                break;
            }
        }
    }
    // Accept a setting if its a valid (signed) integer.
    integer(k, v) {
        if (/^-?\d+$/.test(v)) { // integer
            this.set(k, parseInt(v, 10));
        }
    }
    // Accept a setting if its a valid percentage.
    percent(k, v) {
        if (v.match(/^([\d]{1,3})(\.[\d]*)?%$/)) {
            const value = parseFloat(v);
            if (value >= 0 && value <= 100) {
                this.set(k, value);
                return true;
            }
        }
        return false;
    }
}
exports.Settings = Settings;
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