Convert Dedao articles to Markdown format
// ==UserScript==
// @name Dedao article2markdown
// @namespace http://tampermonkey.net/
// @version 2025-06-02
// @description Convert Dedao articles to Markdown format
// @author AA
// @match https://www.dedao.cn/course/**
// @icon https://www.google.com/s2/favicons?sz=64&domain=dedao.cn
// @grant GM_setClipboard
// @grant GM_notification
// @license MIT
// ==/UserScript==
(function() {
'use strict';
function htmlToMarkdown(htmlElement) {
let markdown = '';
// Process each child node
for (const child of htmlElement.childNodes) {
if (child.nodeType === Node.ELEMENT_NODE) {
// Handle headers
if (child.classList.contains('header-2')) {
markdown += '### ' + child.textContent.trim() + '\n';
}
else if (child.classList.contains('header-3')) {
markdown += '#### ' + child.textContent.trim() + '\n';
}
else if (child.tagName === 'P') {
// 处理段落内容，包括<b>标签
let paragraphText = '';
for (const node of child.childNodes) {
if (node.nodeType === Node.TEXT_NODE) {
paragraphText += node.textContent;
} else if (node.nodeType === Node.ELEMENT_NODE && node.tagName === 'B') {
paragraphText += ' **' + node.textContent + '** ';
}
}
// 检查<p>是否只包含<br>或空白
const hasOnlyBr = child.children.length === 1 &&
child.children[0].tagName === 'BR' &&
child.textContent.trim() === '';
if (hasOnlyBr) {
// 对于只包含<br>的<p>，转换为单个换行
markdown += '\n\n';
} else {
// 普通段落处理
const text = paragraphText.trim();
if (text) {
markdown += text + '\n';
} else {
// 完全空的段落
markdown += '\n';
}
}
}
else if (child.classList.contains('original-block-quote')) {
// Blockquote
const quoteText = child.querySelector('blockquote').textContent.trim();
markdown += '> ' + quoteText.replace(/\n/g, '\n> ') + '\n\n';
}
// 直接处理独立的<b>标签（非段落内）
else if (child.tagName === 'B') {
markdown += '**' + child.textContent + '**';
}
}
}
// Clean up multiple consecutive newlines
markdown = markdown.replace(/\n{3,}/g, '\n\n');
return markdown.trim();
}
function showMarkdownModal(markdown) {
// Create modal container
const modal = document.createElement('div');
modal.style.position = 'fixed';
modal.style.top = '50px';
modal.style.left = '50%';
modal.style.transform = 'translateX(-50%)';
modal.style.width = '80%';
modal.style.maxWidth = '800px';
modal.style.maxHeight = '80vh';
modal.style.backgroundColor = 'white';
modal.style.border = '1px solid #ddd';
modal.style.borderRadius = '5px';
modal.style.boxShadow = '0 4px 8px rgba(0,0,0,0.2)';
modal.style.zIndex = '9999';
modal.style.padding = '20px';
modal.style.overflow = 'auto';
// Create title
const title = document.createElement('h3');
title.textContent = 'Markdown Conversion';
title.style.marginTop = '0';
modal.appendChild(title);
// Create code block
const pre = document.createElement('pre');
pre.style.backgroundColor = '#f5f5f5';
pre.style.padding = '15px';
pre.style.borderRadius = '4px';
pre.style.overflow = 'auto';
pre.style.whiteSpace = 'pre-wrap';
const code = document.createElement('code');
code.textContent = markdown;
pre.appendChild(code);
modal.appendChild(pre);
// Create copy button
const copyBtn = document.createElement('button');
copyBtn.textContent = 'Copy to Clipboard';
copyBtn.style.marginTop = '10px';
copyBtn.style.padding = '8px 15px';
copyBtn.style.backgroundColor = '#4CAF50';
copyBtn.style.color = 'white';
copyBtn.style.border = 'none';
copyBtn.style.borderRadius = '4px';
copyBtn.style.cursor = 'pointer';
copyBtn.addEventListener('click', () => {
navigator.clipboard.writeText(markdown).then(() => {
GM_notification({
title: 'Copied!',
text: 'Markdown content copied to clipboard',
timeout: 2000
});
}).catch(err => {
console.error('Failed to copy:', err);
});
});
modal.appendChild(copyBtn);
// Create close button
const closeBtn = document.createElement('button');
closeBtn.textContent = 'Close';
closeBtn.style.marginLeft = '10px';
closeBtn.style.padding = '8px 15px';
closeBtn.style.backgroundColor = '#f44336';
closeBtn.style.color = 'white';
closeBtn.style.border = 'none';
closeBtn.style.borderRadius = '4px';
closeBtn.style.cursor = 'pointer';
closeBtn.addEventListener('click', () => {
document.body.removeChild(modal);
});
modal.appendChild(closeBtn);
// Add modal to document
document.body.appendChild(modal);
}
// Wait for content to load
const convertBtn = document.createElement('button');
convertBtn.innerHTML = '转换为<br>Markdown';
convertBtn.style.position = 'fixed';
convertBtn.style.top = '5vh';
convertBtn.style.right = '20px';
convertBtn.style.zIndex = '9999';
convertBtn.style.padding = '8px 16px';
convertBtn.style.backgroundColor = '#4CAF50';
convertBtn.style.color = 'white';
convertBtn.style.border = 'none';
convertBtn.style.borderRadius = '4px';
convertBtn.style.cursor = 'pointer';
convertBtn.style.boxShadow = '0 2px 5px rgba(0,0,0,0.2)';
convertBtn.style.fontSize = '14px';
// 添加悬停效果
convertBtn.addEventListener('mouseover', () => {
convertBtn.style.backgroundColor = '#45a049';
});
convertBtn.addEventListener('mouseout', () => {
convertBtn.style.backgroundColor = '#4CAF50';
});
// 按钮点击事件处理
convertBtn.addEventListener('click', () => {
const editorShow = document.querySelector('.editor-show');
if (editorShow) {
const markdown = htmlToMarkdown(editorShow);
showMarkdownModal(markdown);
} else {
GM_notification({
title: '转换失败',
text: '未找到文章内容，请确认是否在文章页面',
timeout: 3000
});
}
});
// 将按钮添加到页面
setTimeout(() => {
document.body.appendChild(convertBtn);
}, 1000);
})();