// ==UserScript==
// @name Markdown Viewer
// @namespace http://tampermonkey.net/
// @version 2.0.1
// @description Automatically formats and displays .md files with a pleasant, readable theme and font settings. Turn your browser into the only Markdown viewer you need by giving your Tampermonkey access to local files.
// @author https://github.com/anga83 (updated by GitHub Copilot)
// @match *://*/*.md
// @include file://*/*.md
// @exclude https://github.com/*
// @exclude http://github.com/*
// @require https://cdn.jsdelivr.net/npm/[email protected]/lib/marked.umd.min.js
// @resource css_darkdown https://raw.githubusercontent.com/yrgoldteeth/darkdowncss/master/darkdown.css
// @grant GM_getResourceText
// @grant GM_setValue
// @grant GM_getValue
// @grant GM_registerMenuCommand
// ==/UserScript==
(function() {
'use strict';
// --- SETTINGS IDENTIFIERS ---
const FONT_STYLE_KEY = 'markdownViewer_fontStyle';
const THEME_KEY = 'markdownViewer_theme';
const STYLE_ELEMENT_ID_FONT = 'userscript-markdown-font-style';
const STYLE_ELEMENT_ID_THEME = 'userscript-markdown-theme-style';
const STYLE_ELEMENT_ID_BASE = 'userscript-markdown-base-style';
// --- FONT SETTINGS ---
const FONT_SETTINGS = {
'serif': `Iowan Old Style, Apple Garamond, Baskerville, Georgia, Times New Roman, Droid Serif, Times, Source Serif Pro, serif, Apple Color Emoji, Segoe UI Emoji, Segoe UI Symbol`,
'sans-serif': `"Segoe UI", "SF Pro Text", "Helvetica Neue", "Ubuntu", "Arial", sans-serif`
};
function removeExistingStyleElement(id) {
const existingStyle = document.getElementById(id);
if (existingStyle) {
existingStyle.remove();
}
}
function addStyleElement(id, css) {
removeExistingStyleElement(id);
const style = document.createElement('style');
style.id = id;
style.textContent = css;
(document.head || document.documentElement).appendChild(style);
}
function applyFontStyle() {
const chosenFont = GM_getValue(FONT_STYLE_KEY, 'serif'); // Standard 'serif'
const fontFamily = FONT_SETTINGS[chosenFont] || FONT_SETTINGS.serif;
addStyleElement(STYLE_ELEMENT_ID_FONT, `.markdown-body { font-family: ${fontFamily} !important; }`);
}
// --- THEME SETTINGS ---
function applyThemeStyle() {
const chosenTheme = GM_getValue(THEME_KEY, 'system'); // 'system', 'light', 'dark'
const prefersDarkScheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
let useDarkTheme = false;
if (chosenTheme === 'dark') {
useDarkTheme = true;
} else if (chosenTheme === 'system' && prefersDarkScheme) {
useDarkTheme = true;
}
let themeCss = '';
if (useDarkTheme) {
const darkdownCss = GM_getResourceText("css_darkdown");
if (darkdownCss) {
themeCss += darkdownCss;
}
// Dark Theme
themeCss += `
body {
background-color: rgb(27, 28, 29) !important;
color: rgb(220, 220, 220) !important;
}
.markdown-body {
color: rgb(220, 220, 220) !important;
}
.markdown-body a {
color: #79b8ff !important; /* Dezenter blau-türkis Farbton statt kräftiges Blau */
text-decoration: none !important; /* Keine Unterstreichung standardmäßig */
}
.markdown-body a:hover {
text-decoration: underline !important; /* Nur beim Hovern unterstreichen */
}
.markdown-body h1, .markdown-body h2, .markdown-body h3, .markdown-body h4, .markdown-body h5, .markdown-body h6 {
border-bottom-color: #30363d !important;
color: rgb(220, 220, 220) !important;
}
.markdown-body hr { background-color: #30363d !important; }
.markdown-body blockquote {
color: #a0a0a0 !important;
border-left-color: #30363d !important;
}
.markdown-body table th, .markdown-body table td { border-color: #484f58 !important; }
.markdown-body code:not(pre code) { /* Inline code */
background-color: rgb(50, 50, 50) !important;
border: 1px solid rgb(70, 70, 70) !important;
color: rgb(220, 220, 220) !important;
}
.markdown-body pre { /* Code block */
background-color: rgb(40, 42, 44) !important;
border: 1px solid rgb(60, 62, 64) !important;
}
.markdown-body pre code {
color: rgb(220, 220, 220) !important;
}
.markdown-body kbd {
background-color: rgb(50,50,50) !important;
border: 1px solid rgb(70,70,70) !important;
color: rgb(220,220,220) !important;
border-bottom-color: rgb(80,80,80) !important;
}
.markdown-body img { filter: brightness(.8) contrast(1.2); }
/* Dark Mode Button Styling */
.custom-play-button {
background-color: #444d56 !important; /* Dunklerer, weniger aufdringlicher Grauton */
color: #e1e4e8 !important; /* Helle Schrift für dunklen Hintergrund */
border: 1px solid #586069 !important; /* Dezenter Rand */
}
.custom-play-button:hover, .custom-play-button:focus {
background-color: #586069 !important; /* Etwas heller beim Hover */
color: #e1e4e8 !important;
border-color: #6a737d !important;
}
.custom-play-button a {
color: #e1e4e8 !important; /* Links erben die Button-Textfarbe */
text-decoration: none !important;
}
.custom-play-button a:hover {
color: #e1e4e8 !important; /* Auch beim Hover Button-Farbe beibehalten */
text-decoration: none !important;
}
`;
} else { // Light Theme
themeCss += `
body {
background-color: #ffffff !important;
color: #24292e !important;
}
.markdown-body {
color: #24292e !important;
}
.markdown-body a {
color: #0366d6 !important;
text-decoration: none !important; /* Keine Unterstreichung standardmäßig */
}
.markdown-body a:hover {
text-decoration: underline !important; /* Nur beim Hovern unterstreichen */
}
.markdown-body h1, .markdown-body h2, .markdown-body h3, .markdown-body h4, .markdown-body h5, .markdown-body h6 {
border-bottom-color: #eaecef !important;
color: #24292e !important;
}
.markdown-body hr { background-color: #e1e4e8 !important; }
.markdown-body blockquote {
color: #6a737d !important;
border-left-color: #dfe2e5 !important;
}
.markdown-body table th, .markdown-body table td { border: 1px solid #dfe2e5 !important; }
.markdown-body code:not(pre code) { /* Inline code */
background-color: rgba(27,31,35,.07) !important;
border: 1px solid rgba(27,31,35,.1) !important;
color: #24292e !important;
}
.markdown-body pre { /* Code block */
background-color: #f6f8fa !important;
border: 1px solid #eaecef !important;
}
.markdown-body pre code {
color: #24292e !important;
}
.markdown-body kbd {
background-color: #fafbfc !important;
border: 1px solid #d1d5da !important;
border-bottom-color: #c6cbd1 !important;
color: #444d56 !important;
}
.markdown-body img { filter: none; }
/* Light Mode Button Styling */
.custom-play-button {
background-color: #f6f8fa !important; /* Heller, subtiler Grauton */
color: #24292e !important; /* Dunkle Schrift für hellen Hintergrund */
border: 1px solid #d1d5da !important; /* Dezenter Rand */
}
.custom-play-button:hover, .custom-play-button:focus {
background-color: #e1e4e8 !important; /* Etwas dunkler beim Hover */
color: #24292e !important;
border-color: #c6cbd1 !important;
}
.custom-play-button a {
color: #24292e !important; /* Links erben die Button-Textfarbe */
text-decoration: none !important;
}
.custom-play-button a:hover {
color: #24292e !important; /* Auch beim Hover Button-Farbe beibehalten */
text-decoration: none !important;
}
`;
}
addStyleElement(STYLE_ELEMENT_ID_THEME, themeCss);
}
// --- MENU COMMANDS ---
GM_registerMenuCommand('Font: Serif', () => {
GM_setValue(FONT_STYLE_KEY, 'serif');
applyFontStyle();
});
GM_registerMenuCommand('Font: Sans-serif', () => {
GM_setValue(FONT_STYLE_KEY, 'sans-serif');
applyFontStyle();
});
GM_registerMenuCommand('Theme: System', () => {
GM_setValue(THEME_KEY, 'system');
applyThemeStyle();
});
GM_registerMenuCommand('Theme: Light', () => {
GM_setValue(THEME_KEY, 'light');
applyThemeStyle();
});
GM_registerMenuCommand('Theme: Dark', () => {
GM_setValue(THEME_KEY, 'dark');
applyThemeStyle();
});
// --- BASE STYLES ---
function applyBaseStyles() {
addStyleElement(STYLE_ELEMENT_ID_BASE, `
body {
margin: 0;
}
.markdown-body {
box-sizing: border-box;
min-width: 200px;
max-width: 980px;
margin: 0 auto;
padding: 15px 30px 30px;
}
.markdown-body img {
max-width: 100%; /* Korrigiert von 150% auf 100% */
height: auto;
display: block;
margin-left: auto;
margin-right: auto;
border-radius: 3px;
}
.markdown-body h1, .markdown-body h2, .markdown-body h3, .markdown-body h4, .markdown-body h5, .markdown-body h6 {
margin-top: 1.8em;
margin-bottom: 0.7em;
padding-bottom: 0.3em; /* Für die untere Linie */
}
.markdown-body h1:hover, .markdown-body h2:hover, .markdown-body h3:hover, .markdown-body h4:hover, .markdown-body h5:hover, .markdown-body h6:hover {
text-decoration: underline; /* Direkte Unterstreichung der Überschriften beim Hovern */
}
.markdown-body h1 { font-size: 2.1em; }
.markdown-body h2 { font-size: 1.7em; }
.markdown-body h3 { font-size: 1.4em; }
.markdown-body h4 { font-size: 1.2em; }
.markdown-body h5 { font-size: 1.05em; }
.markdown-body h6 { font-size: 0.9em; }
/* Code font family (colors/backgrounds are in theme) */
.markdown-body code, .markdown-body kbd, .markdown-body samp, .markdown-body pre {
font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
font-size: 0.9em; /* Etwas kleiner für bessere Lesbarkeit im Fließtext */
}
.markdown-body pre {
padding: 16px;
overflow: auto;
border-radius: 6px;
line-height: 1.45;
}
.markdown-body code:not(pre code) { /* Inline code */
padding: .2em .4em;
margin: 0 .2em; /* Kleiner horizontaler Abstand */
font-size: 88%; /* Relativ zur umgebenden Schriftgröße */
border-radius: 3px;
}
.markdown-body kbd {
padding: .2em .4em;
margin: 0 .2em;
font-size: 88%;
border-radius: 3px;
}
.markdown-body ul, .markdown-body ol {
padding-left: 2em; /* Standardeinzug für Listen */
}
.markdown-body table {
display: block; /* Für Responsivität und Overflow */
width: max-content; /* Passt sich dem Inhalt an, aber nicht breiter als Container */
max-width: 100%;
overflow: auto; /* Scrollbar bei Bedarf */
border-spacing: 0;
border-collapse: collapse;
margin-top: 1em;
margin-bottom: 1em;
}
.markdown-body table th, .markdown-body table td {
padding: 6px 13px;
}
.markdown-body blockquote {
margin-left: 0; /* Standard-Blockquote-Styling */
margin-right: 0;
padding: 0 1em; /* Innenabstand */
}
@media (max-width: 767px) {
.markdown-body {
padding: 20px 15px 15px;
}
.markdown-body h1 { font-size: 1.8em; }
.markdown-body h2 { font-size: 1.5em; }
.markdown-body h3 { font-size: 1.3em; }
}
/* Custom Button Base Style */
.custom-play-button {
display: inline-block;
padding: 10px 18px;
text-decoration: none !important;
border-radius: 5px;
border: none;
font-family: "Segoe UI", "SF Pro Text", "Helvetica Neue", "Ubuntu", "Arial", sans-serif;
font-size: 0.95em;
font-weight: 500;
text-align: center;
cursor: pointer;
margin: 8px 0;
transition: background-color 0.2s ease-in-out, border-color 0.2s ease-in-out;
}
.custom-play-button a {
color: inherit !important;
text-decoration: none !important;
}
`);
}
// --- MAIN SCRIPT EXECUTION ---
function initializeViewer() {
applyBaseStyles();
applyThemeStyle();
applyFontStyle();
// Listener für System-Theme-Änderungen
if (GM_getValue(THEME_KEY, 'system') === 'system') {
const mediaQuery = window.matchMedia('(prefers-color-scheme: dark)');
mediaQuery.removeEventListener('change', applyThemeStyle); // Vorsichtshalber entfernen
mediaQuery.addEventListener('change', applyThemeStyle);
}
const markdownBodyDiv = document.createElement('div');
markdownBodyDiv.className = 'markdown-body';
// Überprüfen, ob marked durch @require geladen wurde
if (typeof marked === 'undefined' || typeof marked.parse !== 'function') {
console.error("Markdown Viewer: Marked.js library not loaded correctly via @require or 'parse' function is missing.");
console.error("Markdown Viewer: typeof marked:", typeof marked);
if (typeof marked !== 'undefined') {
console.error("Markdown Viewer: marked properties:", Object.keys(marked));
console.error("Markdown Viewer: typeof marked.parse:", typeof marked.parse);
}
markdownBodyDiv.innerHTML = `<p style="color:red; font-family:sans-serif;">Error: Marked.js library could not be loaded. Check console for details.</p>`;
document.body.innerHTML = ''; // Vorhandenen Inhalt löschen
document.body.appendChild(markdownBodyDiv);
return;
}
try {
let markdownContentToParse = "";
if (document.contentType === 'text/markdown' ||
(location.protocol === 'file:' && document.body && document.body.children.length === 1 && document.body.firstChild.tagName === 'PRE')) {
markdownContentToParse = document.body.firstChild.innerText;
} else if (document.body && document.body.innerText) {
markdownContentToParse = document.body.innerText;
} else if (document.body && document.body.textContent) {
markdownContentToParse = document.body.textContent;
}
const renderer = new marked.Renderer();
const originalLinkRenderer = renderer.link;
renderer.link = (href, title, text) => {
const buttonPattern = /^\s*<kbd>\s*<br>\s*➡️ Play it right now in your browser\s*<br>\s*<\/kbd>\s*$/i;
if (buttonPattern.test(text)) {
const buttonText = "➡️ Play it right now in your browser";
return `<a href="${href}" ${title ? `title="${title}"` : ''} class="custom-play-button" target="_blank" rel="noopener noreferrer">${buttonText}</a>`;
}
return originalLinkRenderer.call(renderer, href, title, text);
};
marked.use({ renderer });
const htmlContent = marked.parse(markdownContentToParse);
document.body.innerHTML = '';
document.body.appendChild(markdownBodyDiv);
markdownBodyDiv.innerHTML = htmlContent;
} catch (e) {
console.error("Markdown Viewer: Error during Markdown parsing:", e);
markdownBodyDiv.innerHTML = `<p style="color:red; font-family:sans-serif;">Error rendering Markdown: ${e.message}. Check console for details.</p>`;
if (!document.body.contains(markdownBodyDiv)) {
document.body.innerHTML = '';
document.body.appendChild(markdownBodyDiv);
}
}
}
// Stelle sicher, dass das DOM bereit ist, bevor es manipuliert wird
if (document.readyState === "complete" || document.readyState === "interactive") {
initializeViewer();
} else {
document.addEventListener("DOMContentLoaded", initializeViewer);
}
})();
