Simple Dark Theme style for any website which you can configure per-site
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// ==UserScript==
// @name Universal Dark Theme
// @namespace uni_dark_theme
// @version 1.0
// @description Simple Dark Theme style for any website which you can configure per-site
// @supportURL https://github.com/Owyn/Universal_Dark_Theme/issues
// @homepage https://github.com/Owyn/Universal_Dark_Theme
// @icon https://images2.imgbox.com/b3/67/Aq5XazuW_o.png
// @author Owyn
// @match *://*/*
// @grant GM_addStyle
// @grant GM_getValue
// @grant GM_setValue
// @grant GM_registerMenuCommand
// @run-at document-start
// @noframes
// ==/UserScript==
(function() {
'use strict';
var el;
var css;
var cfg_color;
var cfg_bgclr;
var cfg_visclr;
var cfg_excl;
var cfg_css;
var cfg_js;
var cfg_active = (localStorage.getItem('active') === 'true');
function load_settings()
{
cfg_excl = localStorage.getItem('excl') || "";
cfg_css = localStorage.getItem('css') || "";
cfg_js = localStorage.getItem('js') || "";
if (typeof GM_getValue !== "undefined")
{
cfg_color = GM_getValue("Color", "#c0c0c0");
cfg_bgclr = GM_getValue("bgColor", "#2b2b2b");
cfg_visclr = GM_getValue("visitedColor", "#a4a4a4");
}
}
function activate(yes, prev_active)
{
if(prev_active && el){document.body.removeChild(el);}
if(yes)
{
make_css();
el = GM_addStyle(css);
el = document.body.appendChild(el);
if(cfg_js){eval(cfg_js);}
}
}
function toggleDT()
{
load_settings();
let prev_active = cfg_active;
cfg_active = !(localStorage.getItem('active') === 'true');
activate(cfg_active, prev_active);
if(!cfg_active)
{
localStorage.removeItem('active');
}
else
{
localStorage.setItem('active', "true");
}
}
if (typeof GM_registerMenuCommand !== "undefined")
{
GM_registerMenuCommand("Dark Theme Configuration", cfg, "D");
GM_registerMenuCommand("Toggle Dark Theme", toggleDT, "T");
}
function make_css()
{
let exclusions;
let exc_txt = ""
if(cfg_excl !== "")
{
exclusions = cfg_excl.split(",");
for (var i = 0, len = exclusions.length; i < len; i++)
{
exc_txt += ":not("+exclusions[i]+")";
}
}
////////////// Main thing, the style!:
css = `
*`+exc_txt+` {
color: `+cfg_color+` !important;
background: `+cfg_bgclr+` !important;
border-color: `+cfg_color+` !important;
}
a:visited, a:hover`+exc_txt+` {
color: `+cfg_visclr+` !important;
}
`+cfg_css+`
`;
//////////////
}
if(cfg_active)
{
load_settings();
make_css();
el = GM_addStyle(css);
document.addEventListener("DOMContentLoaded", function(){ el = document.body.appendChild(el); if(cfg_js){eval(cfg_js);} });
}
var t;
function cfg()
{
if (typeof GM_setValue !== "undefined")
{
function saveCfg()
{
GM_setValue("Color", document.getElementById("color").value);
GM_setValue("bgColor", document.getElementById("bgclr").value);
GM_setValue("visitedColor", document.getElementById("visitedColor").value);
localStorage.setItem('excl', document.getElementById("excl").value);
localStorage.setItem('css', document.getElementById("css").value);
localStorage.setItem('js', document.getElementById("js").value);
localStorage.setItem('active', document.getElementById("active").checked);
// pretty text "saved"
document.getElementById("cfg_save").value = "SAVED !";
clearTimeout(t);
t = setTimeout(function() {document.getElementById("cfg_save").value = "Save configuration";},1500)
// update active configuration
cfg_color = document.getElementById("color").value;
cfg_bgclr = document.getElementById("bgclr").value;
cfg_visclr = document.getElementById("visitedColor").value;
cfg_excl = document.getElementById("excl").value;
cfg_css = document.getElementById("css").value;
cfg_js = document.getElementById("js").value;
activate(document.getElementById("active").checked, cfg_active );
cfg_active = document.getElementById("active").checked;
// clean up
if(!document.getElementById("active").checked) { localStorage.removeItem('active'); }
if(!document.getElementById("excl").value) { localStorage.removeItem('excl'); }
if(!document.getElementById("css").value) { localStorage.removeItem('css'); }
if(!document.getElementById("js").value) { localStorage.removeItem('js'); }
}
load_settings();
var div = document.createElement("div");
div.style.position = "fixed";
div.style.top = "5%";
div.style.left = "50%";
div.style.margin = "5% -222px";
div.style.width = "444px";
div.style.border = "solid 1px black";
div.style.background = "silver";
div.style.zIndex = 8888888;
div.innerHTML = "<b><center>Configuration</center></b>"
+ "<br><br><input id='color' type='text' size='7'> Text color (empty = site default)"
+ "<br><br><input id='bgclr' type='text' size='7'> Background color"
+ "<br><br><input id='visitedColor' type='text' size='7'> Visited & hovered links color"
+ "<br><br><center><b>Per-site settings (stored in browser cookies called LocalStorage):</b>"
+ "<br><br><input id='active' type='checkbox'> Enabled for this website"
+ "<br><br>Excluded css elements (e.g. \"#id1,.class2,input\"):<br><textarea id='excl' style='margin: 0px; width: 400px; height: 50px; resize:both;'></textarea>"
+ "<br><br>Custom CSS style:<br><textarea id='css' style='margin: 0px; width: 400px; height: 50px; resize:both;'></textarea>"
+ "<br><br>Custom JS Action:<br><textarea id='js' style='margin: 0px; width: 400px; height: 50px; resize:both;'></textarea>"
+ "<br><input id='cfg_save' type='button' value='Save configuration'> <input id='cfg_close' type='button' value='Close'></center>";
document.body.appendChild(div);
document.getElementById("color").value = cfg_color;
document.getElementById("bgclr").value = cfg_bgclr;
document.getElementById("visitedColor").value = cfg_visclr;
//
document.getElementById("active").checked = cfg_active;
document.getElementById("excl").value = cfg_excl;
document.getElementById("css").value = cfg_css;
document.getElementById("js").value = cfg_js;
document.getElementById("cfg_save").addEventListener("click", saveCfg, true);
document.getElementById("cfg_close").addEventListener("click", function(){div.remove();clearTimeout(t);}, true);
}
else
{
alert("Sorry, Chrome userscripts in native mode can't have configurations! Install TamperMonkey userscript-manager extension");
}
}
})();