enable-copy-paste-nptel.user.js

enable-copy-paste-nptel.user.js

// ==UserScript==
// @name         Enable copy/patse on NPTEL
// @namespace    https://gist.github.com/nzec
// @version      1.4
// @description  Enable copy/paste on NPTEL
// @author       nzec
// @license      MIT
// @match        *://*.nptel.ac.in/*
// @match        *://nptel.ac.in/*
// @match        *://*.swayam.gov.in/*
// @match        *://swayam.gov.in/*
// @grant        none
// @run-at       document-start
// @downloadURL  https://gist.githubusercontent.com/nzec/2aefd0f4763b68e7cddc1e22b070774c/raw/enable-copy-paste-nptel.user.js
// @updateURL    https://gist.githubusercontent.com/nzec/2aefd0f4763b68e7cddc1e22b070774c/raw/enable-copy-paste-nptel.user.js
// ==/UserScript==

(function () {
    'use strict';
    const enable = () => {
        // Force selectable text via injected CSS
        const style = document.createElement('style');
        style.textContent = `
            * {
                user-select: auto !important;
                -webkit-user-select: auto !important;
                -moz-user-select: auto !important;
                -ms-user-select: auto !important;
            }
        `;
        (document.head || document.documentElement).appendChild(style);
    };

    // Kill the common blocking event handlers
    const events = ['copy', 'cut', 'paste', 'contextmenu', 'selectstart', 'mousedown', 'mouseup', 'dragstart', 'keydown'];
    events.forEach(evt => {
        document.addEventListener(evt, e => e.stopPropagation(), true);
    });

    // Clear inline on* handlers that block selection/copy
    const clearInline = () => {
        ['onselectstart', 'oncontextmenu', 'oncopy', 'oncut', 'onpaste', 'ondragstart', 'onmousedown'].forEach(h => {
            try {
                document.body && (document.body[h] = null);
                document[h] = null;
            } catch (e) {}
        });
    };

    if (document.body) { enable(); clearInline(); }
    document.addEventListener('DOMContentLoaded', () => { enable(); clearInline(); });
    window.addEventListener('load', () => { enable(); clearInline(); });
})();