Script gives Wikipedia pages a dark color theme
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// ==UserScript==
// @name Wikipedia Dark Theme
// @author Shangru Li
// @version 1.01
// @match *://*.wikipedia.org/*
// @namespace https://github.com/MaxsLi/WikipediaDarkTheme
// @icon https://www.wikipedia.org/favicon.ico
// @grant GM_setValue
// @grant GM_getValue
// @run-at document-start
// @license MIT
//###############---localizations---##################
// @name:en Wikipedia Dark Theme
// @description:en Script gives Wikipedia pages a dark color theme
// @name:ja Wikipediaダークテーマ
// @description:ja Wikipediaのサイトのバックグラウンドを黒に変更するスクリプトです
// @name:zh-CN 维基百科黑色主题
// @description:zh-CN 给予维基百科网页一个黑色主题
// @name:zh-TW 维基百科黑色主题
// @description:zh-TW 給予維基百科網頁壹個黑色主題
// @description Script gives Wikipedia pages a dark color theme
// ==/UserScript==
// The main function is called at every `onreadystatechange`
// Document state will go from `loading` --> `interactive` --> `complete`
// Metadata Block `@run-at document-start` will ensure the script start executing when `loading`
(document.onreadystatechange = function () {
//##################---default_values---#####################################
var default_contrastValue = 8;
var default_foregroundColor = "rgb(238, 255, 255)";
var default_backgroundColor = "rgb(35, 35, 35)";
var default_backgroundColorRGB = splitToRGB(default_backgroundColor);
//##################---one_could_alter_if_desired---#########################
// list of tags of the wikipedia logos and symbols to be excluded from setting backgroundColor to white
var exclude_src_tag = [
"protection-shackle", "green_check", "symbol_support_vote",
"edit-clear", "information_icon", "increase2", "decrease_positive",
"steady2", "decrease2", "increase_negative", "red_question_mark",
"blue_check", "x_mark", "yes_check", "twemoji", "walnut", "cscr-featured",
"sound-openclipart", "folder_hexagonal_icon", "symbol_book_class2",
"question_book-new", "wiktionary-logo", "commons-logo", "wikinews-logo",
"wikiquote-logo", "wikivoyage-logo", "sound-icon", "wikibooks-logo",
"wikiversity-logo", "ambox", "system-search", "split-arrows", "wikiversity_logo",
"wikisource-logo", "wikimedia_community_logo", "wikidata-logo", "mediawiki-logo",
"wikispecies-logo", "nuvola_apps", "white_flag_icon",
"wiki_letter_w_cropped", "edit-copy_purple-wikiq", "acap", "portal-puzzle",
"star_of_life", "disambig-dark", "gnome", "office-book", "audio-input-microphone",
"hsutvald2", "hspolitic", "hsdagensdatum", "hsvissteduatt", "pl_wiki_aktualnosci_ikona",
"hsbild", "wiki_aktualnosci_ikona", "hs_vdq", "hssamarbete", "hswpedia", "w-circle",
"red_pencil_icon", "merge-arrow", "generic_with_pencil", "hsaktuell", "hsearth",
"wikimedia-logo-circle", "wiktionary_ko_without_text", "mediawiki-notext",
"wiktprintable_without_text", "dialog-information", "applications-office",
"celestia", "antistub", "wiki_letter", "kit_body_basketball", "ui_icon_edit-ltr-progressive",
"merge-split-transwiki", "mergefrom", "px-steady", "px-decrease", "px-increase",
"question_book", "padlock-silver", "incubator-logo", "px-chinese_conversion",
"px-applications-graphics", "px-pody_candidate", "px-potd-logo", "px-pd-icon",
"px-dialog-warning", "px-checked_copyright_icon", "px-valued_image_seal",
"px-cscr-former", "px-red_x", "px-crystal_clear_app_kedit", "px-people_icon"
];
// list of tags of images to have color inverted, both lists are subjected to amend
var invert_src_tag = [
"loudspeaker", "signature", "signatur", "chinese_characters", "/media/math/render/",
"translation_to_english_arrow", "disambig_gray", "wikimedia-logo_black", "blue_pencil",
"latin_alphabet_", "_cursiva", "unbalanced_scales", "question%2c_web_fundamentals"
];
//##################___Controller___########################################
if (!GM_getValue("scriptEnabled")) {
addToggleScriptElement();
return false;
} else if ('loading' == document.readyState) {
setPageVisibility("hidden");
} else if ('interactive' == document.readyState) {
setPage();
} else if ('complete' == document.readyState) {
setPageVisibility("visible");
invertChineseConversionBox();
addToggleScriptElement();
}
//##################___Toggle_Link___#######################################
function addToggleScriptElement() {
const loginLinkElement = document.getElementById("pt-login");
const logoutLinkElement = document.getElementById("pt-logout");
// Two cases: user logged-in or not logged-in
// Get the parent of either element that is defined
const parentList = (loginLinkElement) ? (loginLinkElement.parentElement) : (logoutLinkElement.parentElement);
var toggleScriptList = document.createElement('li');
var toggleScriptElement = document.createElement('a');
toggleScriptElement.id = "toggleScriptElement";
toggleScriptElement.style.fontWeight = 'bold';
toggleScriptElement.onclick = function () {
// `GM_setValue()` and `GM_getValue()` are from Tampermonkey API
GM_setValue("scriptEnabled", !GM_getValue("scriptEnabled"));
location.reload();
return false;
};
toggleScriptList.appendChild(toggleScriptElement);
parentList.appendChild(toggleScriptList);
updateToggleScriptElement();
}
function updateToggleScriptElement() {
const toggleScriptElement = document.getElementById("toggleScriptElement");
const language = window.location.href.substring(0, window.location.href.indexOf(".wikipedia")).slice(-2);
switch (language) {
case "zh":
if (GM_getValue("scriptEnabled")) {
toggleScriptElement.text = "关闭黑色主题";
toggleScriptElement.title = "单击来关闭维基百科黑色主题。"
toggleScriptElement.style.color = "white";
} else {
toggleScriptElement.text = "打开黑色主题";
toggleScriptElement.title = "单击来打开维基百科黑色主题。"
toggleScriptElement.style.color = "black";
}
break;
case "ja":
if (GM_getValue("scriptEnabled")) {
toggleScriptElement.text = "ダークテーマを解除する";
toggleScriptElement.title = "ここをクリックしてダークテーマから切り替わる。"
toggleScriptElement.style.color = "white";
} else {
toggleScriptElement.text = "ダークテーマを設定する";
toggleScriptElement.title = "ここをクリックしてダークテーマに切り替わる。"
toggleScriptElement.style.color = "black";
}
break;
default:
if (GM_getValue("scriptEnabled")) {
toggleScriptElement.text = "Disable Dark Theme";
toggleScriptElement.title = "Click to disable Wikipedia Dark Theme."
toggleScriptElement.style.color = "white";
} else {
toggleScriptElement.text = "Enable Dark Theme";
toggleScriptElement.title = "Click to enable Wikipedia Dark Theme."
toggleScriptElement.style.color = "black";
}
break;
}
}
//##################___Functions___#########################################
function setPageVisibility(visibility) {
var entirePage = document.getElementsByTagName('html')[0];
entirePage.style.backgroundColor = default_backgroundColor;
entirePage.style.visibility = visibility;
}
function setPage() {
'use strict';
// General idea is to put all elements on a wikipedia page to an array `allElements`
// traverse through this array and reverse the color of each element accordingly
// running time o(n), where n is the number of elements on a page
var allElements = document.querySelectorAll('*');
for (var i = 0; i < allElements.length; i++) {
var currentElement = allElements[i];
try {
if (!isSpecialElement(currentElement)) {
changeForegroundColor(currentElement);
changeBackgroundColor(currentElement);
}
} catch (e) {
console.log(e);
}
}
}
function isSpecialElement(e) {
if (elementIsImage(e)) {
changeImageIfOnLists(e);
return true;
} else if (elementIsWikiLogo(e)) {
invertImage(e, 90);
return true;
} else if (elementIsKeyboardKey(e)) {
e.style.foregroundColor = default_backgroundColor;
return true;
} else if (elementIsLegendOrPieCharts(e)) {
return true;
} else {
return false;
}
}
function elementIsImage(e) {
if (e.nodeName.toLowerCase() == 'img') {
return true;
}
}
function changeImageIfOnLists(img) {
if (!imageInExcludeList(img)) {
img.style.backgroundColor = "rgb(255, 255, 255)";
}
if (imageInInvertList(img)) {
invertImage(img, 86);
}
}
function imageInExcludeList(img) {
for (var i = 0; i < exclude_src_tag.length; i++) {
if (img.src.toLowerCase().includes(exclude_src_tag[i])) {
return true;
}
}
return false;
}
function imageInInvertList(img) {
for (var i = 0; i < invert_src_tag.length; i++) {
if (img.src.toLowerCase().includes(invert_src_tag[i])) {
return true;
}
}
return false;
}
function invertImage(img, percent) {
img.style.filter = "invert(" + percent + "%)";
}
function elementIsWikiLogo(e) {
if (e.className.toLowerCase().includes("mw-wiki-logo")) {
return true;
}
}
function elementIsKeyboardKey(e) {
if (e.className.toLowerCase().includes('keyboard-key')) {
return true;
}
}
function elementIsLegendOrPieCharts(e) {
if (e.className.toLowerCase().includes('legend') ||
e.className.toLowerCase().includes('border') ||
e.style.borderColor.toLowerCase().includes('transparent') ||
e.style.border.toLowerCase().includes("1px solid rgb(0, 0, 0)")) {
return true;
}
}
function changeForegroundColor(e) {
var foregroundColor = window.getComputedStyle(e, null).getPropertyValue("color");
if (colorIsRGB(foregroundColor)) {
foregroundColor = splitToRGB(foregroundColor);
foregroundColor = inverseRBGColor(foregroundColor);
foregroundColor = increaseRGBToMatchContrastValue(foregroundColor, default_backgroundColorRGB, default_contrastValue, 30);
e.style.color = RGBArrayToString(foregroundColor);
} else {
e.style.color = default_foregroundColor;
}
}
function changeBackgroundColor(e) {
const elementComputedStyle = window.getComputedStyle(e, null);
var backgroundColor = elementComputedStyle.getPropertyValue("background-color");
if (colorIsRGB(backgroundColor)) {
backgroundColor = splitToRGB(backgroundColor);
backgroundColor = inverseRBGColor(backgroundColor);
if (RGBTooDark(backgroundColor)) {
backgroundColor = addValueToRGB(backgroundColor, 30);
}
backgroundColor = decreaseRGBToMatchContrastValue(backgroundColor, default_backgroundColorRGB, default_contrastValue, -30);
e.style.backgroundColor = RGBArrayToString(backgroundColor);
} else {
e.style.backgroundColor = default_backgroundColor;
}
const backgroundImage = elementComputedStyle.getPropertyValue("background-image");
if (backgroundImageToRemove(backgroundImage)) {
e.style.background = default_backgroundColor;
}
}
function backgroundImageToRemove(backgroundImage) {
if (backgroundImage) {
// This link removed the white banner on Chinese Wikipedia main page
if (backgroundImage.includes("Zhwp_blue_banner.png")) {
return true;
}
}
}
function colorIsRGB(c) {
return c.match(/rgb\((\d{1,3}), (\d{1,3}), (\d{1,3})\)/);
}
function splitToRGB(c) {
var rgb = colorIsRGB(c);
return [rgb[1], rgb[2], rgb[3]];
}
function inverseRBGColor(c) {
var r, g, b;
r = 255 - Number(c[0]);
g = 255 - Number(c[1]);
b = 255 - Number(c[2]);
return [r, g, b];
}
function increaseRGBToMatchContrastValue(colorToChange, colorToMatch, contrastValue, changePerLoop) {
var result = colorToChange;
while (contrast(result, colorToMatch) < contrastValue) {
result = addValueToRGB(result, changePerLoop);
}
return result;
}
function decreaseRGBToMatchContrastValue(colorToChange, colorToMatch, contrastValue, changePerLoop) {
var result = colorToChange;
while (contrast(result, colorToMatch) > contrastValue) {
result = addValueToRGB(result, changePerLoop);
}
return result;
}
function contrast(rgb1, rgb2) {
return (luminance(rgb1) + 0.05) / (luminance(rgb2) + 0.05);
}
function luminance(rgb) {
var result = rgb.map(function (v) {
v /= 255;
return v <= 0.03928 ? v / 12.92 : Math.pow((v + 0.055) / 1.055, 2.4);
});
return result[0] * 0.2126 + result[1] * 0.7152 + result[2] * 0.0722;
}
function addValueToRGB(rgb, value) {
return [Number(rgb[0]) + Number(value), Number(rgb[1]) + Number(value), Number(rgb[2]) + Number(value)];
}
function RGBTooDark(rgb) {
if (Number(rgb[0]) < Number(default_backgroundColorRGB[0]) - 10 && Number(rgb[1]) < Number(default_backgroundColorRGB[1]) - 10 &&
Number(rgb[2]) < Number(default_backgroundColorRGB[2]) - 10) {
return true;
}
}
function RGBArrayToString(rgb) {
return 'rgb(' + rgb[0] + ', ' + rgb[1] + ', ' + rgb[2] + ')';
}
function invertChineseConversionBox() {
var sheet = window.document.styleSheets[0];
sheet.insertRule('.vectorTabs li { background-image: none; }', sheet.cssRules.length);
sheet.insertRule('.vectorTabs li a span { background: ' + default_backgroundColor + ' !important; }', sheet.cssRules.length);
sheet.insertRule('.vectorTabs li a span { color: ' + default_foregroundColor + ' !important; }', sheet.cssRules.length);
}
})();