Adds dark theme to ProtonMail email reading and composition areas
// ==UserScript==
// @name ProtonMail Dark Theme for Email Content
// @namespace http://tampermonkey.net/
// @version 1.5
// @description Adds dark theme to ProtonMail email reading and composition areas
// @match https://mail.proton.me/*
// @match https://proton.me/mail/*
// @grant GM_addStyle
// @grant unsafeWindow
// @license WTFPL
// ==/UserScript==
(function() {
'use strict';
// Main window CSS
GM_addStyle(`
/* Composer window and borders */
.composer, .composer .composer-content--rich-edition {
background-color: #1a1a1a !important;
border-color: #333 !important;
}
.composer-inner {
background-color: #1a1a1a !important;
border-color: #333 !important;
}
.composer-title {
background-color: #1a1a1a !important;
border-color: #333 !important;
}
/* Message containers */
.message-container,
.message-content,
.message-content-wrapper,
.scroll-horizontal-shadow {
background-color: #1a1a1a !important;
border-color: #333 !important;
}
/* General containers and borders */
.rounded-lg,
.border,
[class*="border-"] {
border-color: #333 !important;
}
/* Message header and footer areas */
.message-header-wrapper,
.message-footer-wrapper {
background-color: #1a1a1a !important;
}
/* Toolbar and button backgrounds */
.editor-toolbar,
.composer-toolbar {
background-color: #262626 !important;
border-color: #333 !important;
}
`);
// CSS to inject into iframes
const darkThemeCSS = `
body {
background-color: #1a1a1a !important;
color: #e0e0e0 !important;
}
p, div, span, h1, h2, h3, h4, h5, h6, td, th, li {
color: #e0e0e0 !important;
background-color: #1a1a1a !important;
}
[style*="background-color"],
[bgcolor] {
background-color: #1a1a1a !important;
}
[style*="color"],
[color] {
color: #e0e0e0 !important;
}
blockquote {
border-left-color: #404040 !important;
background-color: #262626 !important;
color: #e0e0e0 !important;
}
a {
color: #66b3ff !important;
}
/* Table backgrounds */
table, tr, td, th {
background-color: #1a1a1a !important;
border-color: #333 !important;
}
/* Force color on common elements that might have inline styles */
[style*="color: rgb(0, 0, 0)"],
[style*="color: black"],
[style*="color:#000"],
[style*="color: #000"],
font[color] {
color: #e0e0e0 !important;
}
.composer {
background-color: #1a1a1a !important;
border-color: #333 !important;
}
.composer-inner {
background-color: #1a1a1a !important;
border-color: #333 !important;
}
.composer-title {
background-color: #1a1a1a !important;
border-color: #333 !important;
}
/* Message containers */
.message-container,
.message-content-wrapper,
.scroll-horizontal-shadow {
background-color: #1a1a1a !important;
border-color: #333 !important;
}
/* General containers and borders */
.rounded-lg,
.border,
[class*="border-"] {
border-color: #333 !important;
}
/* Message header and footer areas */
.message-header-wrapper,
.message-footer-wrapper {
background-color: #1a1a1a !important;
}
/* Toolbar and button backgrounds */
.editor-toolbar,
.composer-toolbar {
background-color: #262626 !important;
border-color: #333 !important;
}
`;
// Function to inject styles into an iframe
function injectIframeStyles(iframe) {
try {
const inject = () => {
if (!iframe.contentDocument) return;
// Create and inject stylesheet if it doesn't exist
if (!iframe.contentDocument.querySelector('#dark-theme-style')) {
const style = iframe.contentDocument.createElement('style');
style.id = 'dark-theme-style';
style.textContent = darkThemeCSS;
iframe.contentDocument.head.appendChild(style);
}
// Force color on any elements with inline styles
const elements = iframe.contentDocument.querySelectorAll('*');
elements.forEach(el => {
if (el.tagName !== 'IMG') {
el.style.setProperty('background-color', '#1a1a1a', 'important');
el.style.setProperty('color', '#e0e0e0', 'important');
if (el.style.backgroundImage && el.style.backgroundImage !== 'none') {
el.style.setProperty('background-image', 'none', 'important');
}
}
});
// Add mutation observer for dynamically added content within the iframe
const observer = new MutationObserver((mutations) => {
mutations.forEach((mutation) => {
mutation.addedNodes.forEach((node) => {
if (node.nodeType === 1 && node.tagName !== 'IMG') {
node.style.setProperty('background-color', '#1a1a1a', 'important');
node.style.setProperty('color', '#e0e0e0', 'important');
}
});
});
});
observer.observe(iframe.contentDocument.body, {
childList: true,
subtree: true,
attributes: true,
attributeFilter: ['style', 'class']
});
};
// If iframe is already loaded
if (iframe.contentDocument && iframe.contentDocument.readyState === 'complete') {
inject();
}
// Also listen for load event
iframe.addEventListener('load', inject);
} catch (e) {
// Handle cross-origin errors silently
}
}
// Function to watch a specific container for iframes
function watchContainer(container) {
if (!container) return;
// Process any existing iframes
container.querySelectorAll('iframe').forEach(iframe => {
injectIframeStyles(iframe);
});
// Watch for new iframes
const observer = new MutationObserver((mutations) => {
mutations.forEach(mutation => {
mutation.addedNodes.forEach(node => {
// Direct iframe
if (node.tagName === 'IFRAME') {
injectIframeStyles(node);
}
// Iframe within added node
if (node.querySelectorAll) {
node.querySelectorAll('iframe').forEach(iframe => {
injectIframeStyles(iframe);
});
}
});
});
});
observer.observe(container, {
childList: true,
subtree: true,
attributes: true,
attributeFilter: ['src', 'srcdoc']
});
}
// Function to set up all observers
function setupObservers() {
// Watch for new messages and composers
const bodyObserver = new MutationObserver((mutations) => {
mutations.forEach(mutation => {
mutation.addedNodes.forEach(node => {
if (node.nodeType === 1) {
// Watch message containers
if (node.classList?.contains('message-container')) {
watchContainer(node);
}
// Watch for reply composer
if (node.classList?.contains('reply-wrapper')) {
watchContainer(node);
}
// Watch any other potential containers
node.querySelectorAll('.message-container, .reply-wrapper, .composer-body-container').forEach(container => {
watchContainer(container);
});
}
});
});
});
bodyObserver.observe(document.body, {
childList: true,
subtree: true
});
// Process existing containers
document.querySelectorAll('.message-container, .reply-wrapper, .composer-body-container').forEach(container => {
watchContainer(container);
});
}
// Initial setup
setupObservers();
// Handle route changes
let lastUrl = location.href;
new MutationObserver(() => {
const url = location.href;
if (url !== lastUrl) {
lastUrl = url;
setTimeout(setupObservers, 500);
}
}).observe(document, { subtree: true, childList: true });
// Check periodically for new reply composers
setInterval(() => {
document.querySelectorAll('.reply-wrapper iframe').forEach(iframe => {
if (!iframe.contentDocument?.querySelector('#dark-theme-style')) {
injectIframeStyles(iframe);
}
});
}, 1000);
})();