pulseplot/lib/utils.js

Pulse data viewer JS library

/**
    @file Various utils.

    @author Christian W. Zuckschwerdt <zany@triq.net>
    @copyright Christian W. Zuckschwerdt, 2019
    @license
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 2 of the License, or
    (at your option) any later version.
*/

/** Returns element or expands selector. */
export function selector(elementOrSelector) {
    if (!elementOrSelector) {
        return elementOrSelector
    } else if (typeof elementOrSelector === 'string') {
        return document.querySelector(elementOrSelector)
    } else {
        return elementOrSelector // instanceof Element
    }
}

/** Returns array or expands key. */
export function lookup(table, arrayOrKey) {
    if (!arrayOrKey)
        return arrayOrKey
    if (typeof arrayOrKey !== 'string')
        return arrayOrKey
    if (table[arrayOrKey])
        return table[arrayOrKey]
    const match = arrayOrKey.toLowerCase()
    for (let key in table)
        if (key.toLowerCase() == match)
            return table[key]
    for (let key in table)
        if (key.toLowerCase().startsWith(match))
            return table[key]
    return null
}

/** Strips HTML tags. */
export function strip(html) {
    var doc = new DOMParser().parseFromString(html, 'text/html');
    return doc.body.textContent || '';
}