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Easy Markdown for StackExchange

Adds "Markdown" and "Copy" buttons to display original Markdown content in Stackoverflow

当前为 2023-11-27 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name Easy Markdown for StackExchange
  3. // @version 2.1
  4. // @author Murphy Lo (http://github.com/MurphyLo)
  5. // @description Adds "Markdown" and "Copy" buttons to display original Markdown content in Stackoverflow
  6. // @license GNU GPL v3 (http://www.gnu.org/copyleft/gpl.html)
  7. // @match https://*.stackoverflow.com/questions/*
  8. // @match https://*.superuser.com/questions/*
  9. // @match https://*.serverfault.com/questions/*
  10. // @match https://*.stackexchange.com/questions/*
  11. // @match https://*.askubuntu.com/questions/*
  12. // @match https://*.math.stackexchange.com/questions/*
  13. // @match https://*.tex.stackexchange.com/questions/*
  14. // @match https://*.english.stackexchange.com/questions/*
  15. // @match https://*.gaming.stackexchange.com/questions/*
  16. // @match https://*.physics.stackexchange.com/questions/*
  17. // @match https://*.chemistry.stackexchange.com/questions/*
  18. // @match https://*.biology.stackexchange.com/questions/*
  19. // @match https://*.programmers.stackexchange.com/questions/*
  20. // @match https://*.electronics.stackexchange.com/questions/*
  21. // @grant none
  22. // @namespace https://greasyfork.org/users/1224148
  23. // ==/UserScript==
  24.  
  25. // This script is a modified version of an original script by Manish Goregaokar (http://stackapps.com/users/10098/manishearth)
  26. // Original script: https://github.com/Manishearth/Manish-Codes/raw/master/StackExchange/PrintPost.user.js
  27. // The original script is licensed under the GNU GPL v3 (http://www.gnu.org/copyleft/gpl.html)
  28. // Modifications made by Murphy Lo
  29.  
  30. (async function() {
  31.     'use strict';
  32.  
  33.     // Function to fetch content of a post
  34.     async function fetchMarkdown(postId) {
  35.         const response = await fetch(`/posts/${postId}/edit-inline`);
  36.         const data = await response.text();
  37.         let markdown = data.match(/<textarea[^>]*>([\s\S]*?)<\/textarea>/)[1];
  38.  
  39.         // Decode HTML entities
  40.         return decodeHtmlEntities(markdown);
  41.     }
  42.  
  43.     // Function to decode HTML entities from the content into Markdown plain text
  44.     function decodeHtmlEntities(str) {
  45.         const tempElement = document.createElement('div');
  46.         tempElement.innerHTML = str;
  47.         return tempElement.textContent;
  48.     }
  49.  
  50.     // Function to show markdown content in a modal
  51.     function showMarkdown(event) {
  52.         // Prevent the default action
  53.         event.preventDefault();
  54.  
  55.         // Disable scrolling on the main page
  56.         const scrollbarWidth = window.innerWidth - document.documentElement.clientWidth;
  57.         document.body.style.overflow = 'hidden';
  58.         document.body.style.paddingRight = `${scrollbarWidth}px`;
  59.  
  60.         // Add paddingRight to fixed positioned elements
  61.         const fixedElements = document.querySelectorAll('header.s-topbar');
  62.         fixedElements.forEach(el => el.style.paddingRight = `${scrollbarWidth}px`);
  63.  
  64.         // Create a modal to display the markdown (updated style)
  65.         const modal = document.createElement('div');
  66.         modal.style.cssText = `
  67.             position: fixed;
  68.             z-index: 5051;
  69.             left: 0;
  70.             top: 0;
  71.             width: 100%;
  72.             height: 100%;
  73.             overflow: none;
  74.             background-color: rgba(0,0,0,0.5);`;
  75.  
  76.         const modalContent = document.createElement('div');
  77.         modalContent.style.cssText = `
  78.             background-color: #FFF;
  79.             margin: 5% auto;
  80.             padding: 20px;
  81.             border: 1px solid #888;
  82.             width: 70%;
  83.             max-height: 90%;
  84.             overflow-y: auto;
  85.             box-sizing: border-box;
  86.             border-radius: 5px;
  87.             box-shadow: 0 4px 8px 0 rgba(0,0,0,0.3);`;
  88.  
  89.         // Updated close button style
  90.         const closeButton = document.createElement('span');
  91.         closeButton.style.cssText = `
  92.             color: #aaa;
  93.             float: right;
  94.             font-size: 28px;
  95.             font-weight: bold;
  96.             cursor: pointer;
  97.             margin-left: 10px;`;
  98.         closeButton.textContent = '✕';
  99.         closeButton.onmouseover = () => closeButton.style.color = 'black';
  100.         closeButton.onmouseout = () => closeButton.style.color = '#aaa';
  101.  
  102.         const markdownElement = document.createElement('pre');
  103.         markdownElement.style.cssText = `
  104.             margin: 0;
  105.             white-space: pre-wrap;
  106.             word-wrap: break-word;
  107.             overflow-y: auto;`;
  108.         markdownElement.textContent = this.markdownContent;
  109.  
  110.         modalContent.appendChild(closeButton);
  111.         modalContent.appendChild(markdownElement);
  112.         modal.appendChild(modalContent);
  113.         document.body.appendChild(modal);
  114.  
  115.         // Close modal behaviors
  116.         function closeModal() {
  117.             // Removing the modal from the DOM
  118.             document.body.removeChild(modal);
  119.             document.removeEventListener('keydown', handleKeyDown);
  120.  
  121.             // Re-enable scrolling on the main page and remove the paddingRight
  122.             document.body.style.overflow = '';
  123.             document.body.style.paddingRight = '';
  124.  
  125.             // Remove paddingRight from fixed positioned elements
  126.             const fixedElements = document.querySelectorAll('header.s-topbar');
  127.             fixedElements.forEach(el => el.style.paddingRight = '');
  128.         }
  129.  
  130.         // Click `x` to close modal
  131.         closeButton.onclick = closeModal;
  132.         // Press `Esc` to close modal
  133.         const handleKeyDown = (event) => event.keyCode === 27 && closeModal(); // 27 is the keyCode for the Esc key
  134.         document.addEventListener('keydown', handleKeyDown);
  135.         // Click modal background to close modal
  136.         modal.onclick = (e) => e.target === modal && closeModal();
  137.  
  138.     }
  139.  
  140.     // Function to copy text to clipboard
  141.     async function copyToClipboard(text) {
  142.         try {
  143.             await navigator.clipboard.writeText(text);
  144.             // console.log('Markdown content copied to clipboard');
  145.         } catch (err) {
  146.             console.error('Failed to copy Markdown content: ', err);
  147.         }
  148.     }
  149.  
  150.     // Add "Markdown" and "Copy" buttons to each post
  151.     const posts = document.querySelectorAll('.question, .answer');
  152.     for (const post of posts) {
  153.         const postMenu = post.querySelector('.d-flex.gs8.s-anchors.s-anchors__muted.fw-wrap');
  154.         const separator = document.createElement('span');
  155.         separator.className = 'lsep';
  156.         separator.textContent = '|';
  157.         postMenu.appendChild(separator);
  158.  
  159.         // Add Markdown button
  160.         const printButton = document.createElement('a');
  161.         printButton.href = '#';
  162.         printButton.textContent = 'Markdown';
  163.         printButton.title = 'View this post\'s original Markdown content';
  164.         printButton.onclick = showMarkdown;
  165.  
  166.         const printButtonWrapper = document.createElement('div');
  167.         printButtonWrapper.className = 'flex--item';
  168.         printButtonWrapper.appendChild(printButton);
  169.  
  170.         postMenu.appendChild(printButtonWrapper);
  171.  
  172.         // Add Copy button
  173.         const copyButton = document.createElement('a');
  174.         copyButton.href = '#';
  175.         copyButton.textContent = 'Copy';
  176.         copyButton.title = 'Copy this post\'s original Markdown content to clipboard';
  177.         copyButton.onclick = (event) => {
  178.             event.preventDefault();
  179.             copyToClipboard(printButton.markdownContent);
  180.         };
  181.  
  182.         const copyButtonWrapper = document.createElement('div');
  183.         copyButtonWrapper.className = 'flex--item';
  184.         copyButtonWrapper.appendChild(copyButton);
  185.  
  186.         postMenu.appendChild(copyButtonWrapper);
  187.  
  188.         // Fetch and store markdown content
  189.         const postId = post.dataset.questionid || post.dataset.answerid;
  190.         printButton.markdownContent = await fetchMarkdown(postId);
  191.     }
  192. })();