BetterDiscordApp-v2/client/src/ui/dom.js

/**
 * BetterDiscord Client DOM Module
 * Copyright (c) 2015-present Jiiks/JsSucks - https://github.com/Jiiks / https://github.com/JsSucks
 * All rights reserved.
 * https://betterdiscord.net
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
*/

class BdNode {
    constructor(tag, className, id) {
        this.element = document.createElement(tag);
        if (className) this.element.className = className;
        if (id) this.element.id = id;
    }

    appendTo(e) {
        const el = DOM.getElement(e);
        if (!el) return null;
        el.append(this.element);
        return this.element;
    }

    prependTo(e) {
        const el = DOM.getElement(e);
        if (!el) return null;
        el.prepend(this.element);
        return this.element;
    }
}

class DOM {

    static get bdHead() {
        return this.getElement('bd-head') || this.createElement('bd-head').appendTo('head');
    }
    static get bdBody() {
        return this.getElement('bd-body') || this.createElement('bd-body').appendTo('body');
    }
    static get bdStyles() {
        return this.getElement('bd-styles') || this.createElement('bd-styles').appendTo(this.bdHead);
    }
    static get bdThemes() {
        return this.getElement('bd-themes') || this.createElement('bd-themes').appendTo(this.bdHead);
    }
    static get bdTooltips() {
        return this.getElement('bd-tooltips') || this.createElement('bd-tooltips').appendTo(this.bdBody);
    }

    static getElement(e) {
        if (e instanceof BdNode) return e.element;
        if (e instanceof window.Node) return e;
        if ('string' !== typeof e) return null;
        return document.querySelector(e);
    }

    static createElement(tag = 'div', className = null, id = null) {
        return new BdNode(tag, className, id);
    }

    static deleteStyle(id) {
        const exists = this.getElement(`bd-styles > #${id}`);
        if (exists) exists.remove();
    }   

    static injectStyle(css, id) {
        this.deleteStyle(id);
        this.bdStyles.append(this.createStyle(css, id));
    }

    static deleteTheme(id) {
        const exists = this.getElement(`bd-themes > #${id}`);
        if (exists) exists.remove();
    }

    static injectTheme(css, id) {
        this.deleteTheme(id);
        this.bdThemes.append(this.createStyle(css, id));
    }

    static createStyle(css, id) {
        const style = document.createElement('style');
        style.id = id;
        style.type = 'text/css';
        style.appendChild(document.createTextNode(css));
        return style;
    }
}

export default DOM;