DOI-Unlock with CTRL+left click on any DOI on any page will turn to 3 buttons, which are linked to Sci-Hub, Lib-Gen and Z-Lib
// ==UserScript==
// @name DOI-Unlock
// @namespace https://greasyfork.org/en/users/738719-szmegma
// @version 1.0.6
// @description DOI-Unlock with CTRL+left click on any DOI on any page will turn to 3 buttons, which are linked to Sci-Hub, Lib-Gen and Z-Lib
// @author szmegma
// @match http://*/*
// @match https://*/*
// @require https://code.jquery.com/jquery-latest.min.js
// @license MIT
// @grant GM_addStyle
// @icon data:image/png;base64,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
// ==/UserScript==
//================================================== settings
//variables
const
regex = '(10\.[0-9]{4,}(?:\.[0-9]+)*/(?:(?![%"&\'<>#? ])\\S)+)',
doiRegex = new RegExp('(?:' + regex + ')', 'i'),
//doiRegex = new RegExp(regex),
btn1 = document.createElement('input'),
btn2 = document.createElement('input'),
btn3 = document.createElement('input'),
libgenURL = 'http://libgen.li/scimag/index.php?s=',
zlibURL = 'https://booksc.org/s/?q=',
scihubURL = 'https://sci-hub.ru/',
style = "color:orange;font-size:1.5rem;line-height:2;padding:5px;background:black;text-shadow: 1px 1px 0 black, 1px -1px 0 black, -1px 1px 0 black, -1px -1px 0 black";
//================================================== find DOI
function findDOI(element){
if($(element).is("[href*='org/10.']"))
return $(element).attr("href").split('org/')[1].trim();
if($(element).text().match(doiRegex)!==null)
return $(element).text().match(doiRegex)[0].trim();
return false;
}
//================================================== button click to navigate the selected site
function unlockDOI(){
if($(this).is("[data-doi]")){
if(this.id=='scihub')
window.open(scihubURL+$(this).attr('data-doi'));
if(this.id=='zlib')
window.open(zlibURL+$(this).attr('data-doi'));
if(this.id=='libgen')
window.open(libgenURL+$(this).attr('data-doi'));
}
}
$(document).ready(function(){
//================================================== set attributes for all buttons
btn1.setAttribute("value", "SCI-HUB");
btn1.setAttribute("type", "button");
btn1.setAttribute("id", "scihub");
btn1.setAttribute("class", "DOI-unlock-button");
btn2.setAttribute("value", "Z-LIB");
btn2.setAttribute("type", "button");
btn2.setAttribute("id", "zlib");
btn2.setAttribute("class", "DOI-unlock-button");
btn3.setAttribute("value", "LIB-GEN");
btn3.setAttribute("type", "button");
btn3.setAttribute("id", "libgen");
btn3.setAttribute("class", "DOI-unlock-button");
//================================================== append buttons to the body and acivate them
document.getElementsByTagName('body')[0].append(btn1,btn2,btn3);
document.getElementById("scihub").addEventListener("click", unlockDOI, false);
document.getElementById("zlib").addEventListener("click", unlockDOI, false);
document.getElementById("libgen").addEventListener("click", unlockDOI, false);
//================================================== remove all inspected class and DOI attribute from buttons
//remove all button attributes
$('input').removeAttr('data-doi');
//remove all highlights
[].forEach.call(document.querySelectorAll('*'), function(a){
a.classList.remove('DOI-unlock-inspected');
});
//================================================== if BACK or FORWARD button has been clicked
if(window.history && window.history.pushState) {
window.history.pushState('forward', null, '');
$(window).on('popstate', function(){
//remove all button attributes
$('input').removeAttr('data-doi');
//remove all highlights
[].forEach.call(document.querySelectorAll('*'), function(a){
a.classList.remove('DOI-unlock-inspected');
});
});
}
//================================================== find DOI press CTRL key and hold + click on DOI
$(document).on('click', function(e){
//if NOT the DOI-unlock-button has been clicked
if(!$(e.target).hasClass('DOI-unlock-button')){
//remove all button attributes
$('input').removeAttr('data-doi');
//remove all highlights
[].forEach.call(document.querySelectorAll('*'), function(a){
a.classList.remove('DOI-unlock-inspected');
});
}
//if CTRL key has pressed
if(e.ctrlKey){
//prevent the default function of the cliked element
e.preventDefault();
//clear console
console.clear();
//if clicked element returned valid DOI
if(findDOI(e.target)){
//add DOI attribute to the buttons
$('input.DOI-unlock-button').attr('data-doi',findDOI(e.target));
//add highlight to the clicked element
e.target.classList.add("DOI-unlock-inspected");
}
}
});
//================================================== style the buttons
GM_addStyle(`
#scihub{
left:0 !important;
}
#zlib{
left:100px !important;
}
#libgen{
left:200px !important;
}
.DOI-unlock-button{
z-index:99999999;
width:100px !important;
height:30px !important;
background:black !important;
color:white !important;
cursor:pointer;
display:none !important;
position:fixed !important;
bottom:0 !important;
border:none !important;
box-shadow:0 0 0 1px white inset;
margin:0 !important;
padding:0 !important;
font-size:inherit !important;
text-align:center !important;
}
.DOI-unlock-inspected{
background:yellow !important;
color:black !important;
font-size:130% !important;
padding:5px !important;
}
*[data-doi]{
display:block !important;
}
`);
});