jodit/src/modules/helpers/normalize/normalizeColor.ts

Jodit is awesome and usefully wysiwyg editor with filebrowser

/*!
 * Jodit Editor (https://xdsoft.net/jodit/)
 * Licensed under GNU General Public License version 2 or later or a commercial license or MIT;
 * For GPL see LICENSE-GPL.txt in the project root for license information.
 * For MIT see LICENSE-MIT.txt in the project root for license information.
 * For commercial licenses see https://xdsoft.net/jodit/commercial/
 * Copyright (c) 2013-2019 Valeriy Chupurnov. All rights reserved. https://xdsoft.net
 */

import { colorToHex } from '../color/colorToHex';
import { trim } from '../string/trim';

/**
 * Convert rgba and short HEX color to Full text color. #fff to #FFFFFF
 *
 * @method normalizeColor
 * @param {string} colorInput - string like rgba(red, green, blue, alpha) or rgb(red, green, blue) or #fff or #ffffff
 * @return {string|boolean} HEX color, false - for transparent color
 */
export const normalizeColor = (colorInput: string): string | false => {
    const newcolor: string[] = ['#'];

    let color: string = colorToHex(colorInput) as string;

    if (!color) {
        return false;
    }

    color = trim(color.toUpperCase());
    color = color.substr(1);

    if (color.length === 3) {
        for (let i = 0; i < 3; i += 1) {
            newcolor.push(color[i]);
            newcolor.push(color[i]);
        }
        return newcolor.join('');
    }

    if (color.length > 6) {
        color = color.substr(0, 6);
    }

    return '#' + color;
};