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PDF Finder and Downloader

Find and add a download button for PDFs on webpages, including embedded PDFs in iframes.

当前为 2024-03-25 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name         PDF Finder and Downloader
  3. // @version      1.2
  4. // @description  Find and add a download button for PDFs on webpages, including embedded PDFs in iframes.
  5. // @author       iamnobody
  6. // @license      MIT
  7. // @match        *://*/*
  8. // @grant        none
  9. // @icon         https://upload.wikimedia.org/wikipedia/commons/thumb/8/87/PDF_file_icon.svg/400px-PDF_file_icon.svg.png
  10. // @namespace pdf downloader
  11. // ==/UserScript==
  12.  
  13. (function() {
  14.     'use strict';
  15.  
  16.     // Function to check if a link ends with .pdf
  17.     function isPDFLink(link) {
  18.         return link.toLowerCase().endsWith('.pdf');
  19.     }
  20.  
  21.     // Function to add a download button next to a PDF link
  22.     function addDownloadButton(element, pdfLink) {
  23.         const downloadButton = document.createElement('button');
  24.         downloadButton.innerText = 'PDF ⬇️';
  25.         downloadButton.style.backgroundColor = 'violet'; // Change color to violet
  26.         downloadButton.style.color = 'white';
  27.         downloadButton.style.border = 'none';
  28.         downloadButton.style.padding = '5px 10px';
  29.         downloadButton.style.marginLeft = '5px';
  30.         downloadButton.style.cursor = 'pointer';
  31.  
  32.         downloadButton.addEventListener('click', function(event) {
  33.             event.preventDefault();
  34.             window.open(pdfLink, '_blank');
  35.         });
  36.  
  37.         // Insert the download button next to the PDF link or iframe
  38.         element.parentNode.insertBefore(downloadButton, element.nextSibling);
  39.  
  40.         // Add circular button beside the PDF ⬇️ button
  41.         addCircularButton(downloadButton);
  42.     }
  43.  
  44.     // Function to add a circular button beside the PDF ⬇️ button
  45.     function addCircularButton(downloadButton) {
  46.         const circularButton = document.createElement('button');
  47.         circularButton.innerText = '-';
  48.         circularButton.style.backgroundColor = 'green'; // Set color to green
  49.         circularButton.style.color = 'white';
  50.         circularButton.style.border = 'none';
  51.         circularButton.style.borderRadius = '50%'; // Make it circular
  52.         circularButton.style.width = '20px';
  53.         circularButton.style.height = '20px';
  54.         circularButton.style.marginLeft = '5px';
  55.         circularButton.style.cursor = 'pointer';
  56.  
  57.         // Add click event listener to exclude the website
  58.         circularButton.addEventListener('click', function(event) {
  59.             event.preventDefault();
  60.             excludeWebsiteFromScript();
  61.         });
  62.  
  63.         // Insert the circular button next to the PDF ⬇️ button
  64.         downloadButton.parentNode.insertBefore(circularButton, downloadButton.nextSibling);
  65.     }
  66.  
  67.     // Function to exclude the current website's domain from running the script
  68.     function excludeWebsiteFromScript() {
  69.         const currentDomain = window.location.hostname;
  70.         let excludedDomains = JSON.parse(localStorage.getItem('excludedDomains')) || [];
  71.         if (!excludedDomains.includes(currentDomain)) {
  72.             excludedDomains.push(currentDomain);
  73.             localStorage.setItem('excludedDomains', JSON.stringify(excludedDomains));
  74.         }
  75.     }
  76.  
  77.     // Function to check if the current website's domain should be excluded from running the script
  78.     function shouldExcludeWebsite() {
  79.         const currentDomain = window.location.hostname;
  80.         const excludedDomains = JSON.parse(localStorage.getItem('excludedDomains')) || [];
  81.         return excludedDomains.includes(currentDomain);
  82.     }
  83.  
  84.     // Function to find PDF links on the page and add download buttons
  85.     function findAndAddPDFDownloadButtons() {
  86.         if (!shouldExcludeWebsite()) {
  87.             const links = document.querySelectorAll('a, iframe');
  88.             links.forEach(link => {
  89.                 let pdfLink;
  90.                 if (link.tagName.toLowerCase() === 'iframe') {
  91.                     const dataSource = link.getAttribute('data-source');
  92.                     if (dataSource) {
  93.                         pdfLink = getPDFLinkFromDataSource(dataSource);
  94.                     }
  95.                 } else if (isPDFLink(link.href)) {
  96.                     pdfLink = link.href;
  97.                 }
  98.                 if (pdfLink) {
  99.                     addDownloadButton(link, pdfLink);
  100.                 }
  101.             });
  102.         }
  103.     }
  104.  
  105.     // Function to extract PDF link from data-source attribute
  106.     function getPDFLinkFromDataSource(dataSource) {
  107.         const match = dataSource.match(/file=([^&]+)/);
  108.         if (match && match[1]) {
  109.             return decodeURIComponent(match[1]);
  110.         }
  111.         return null;
  112.     }
  113.  
  114.     // Run the function when the page is fully loaded
  115.     window.addEventListener('load', findAndAddPDFDownloadButtons);
  116.  
  117. })();