// ==UserScript==// @name         Download protected PDF file from Google Drive// @namespace    Download protected PDF file// @description  You can download protected PDF file// @version      1.1// @match        https://drive.google.com/*// @grant        GM_registerMenuCommand// @require      https://unpkg.com/jspdf@latest/dist/jspdf.umd.min.js// ==/UserScript==(function() {'use strict';function rescale(width, height, fitWidth, fitHeight) {let ratio = width / height;let fitRatio = fitWidth / fitHeight;if (ratio <= fitRatio) {return [width, width / fitRatio];} else {return [height * fitRatio, height];}}function imageToBase64(img) {let canvas = document.createElement("canvas");let context = canvas.getContext("2d");canvas.width = img.naturalWidth;canvas.height = img.naturalHeight;context.drawImage(img, 0, 0, img.naturalWidth, img.naturalHeight);return canvas.toDataURL("image/png", 1.0);}function downloadPDF() {try {let jsPDF = window.jspdf.jsPDF;let pdf = new jsPDF();let pdfWidth = pdf.internal.pageSize.getWidth();let pdfHeight = pdf.internal.pageSize.getHeight();let elements = document.getElementsByTagName("img");for (let img of elements) {if (!/^blob:/.test(img.src)) {continue;}console.log("adding image", img.src);let imgData = imageToBase64(img);let [newWidth, newHeight] = rescale(pdfWidth, pdfHeight, img.naturalWidth, img.naturalHeight);pdf.addImage(imgData, "png", 0, 0, newWidth, newHeight);pdf.addPage();}pdf.deletePage(pdf.internal.getNumberOfPages());pdf.save("download.pdf");} catch(e) {console.log(e);}}GM_registerMenuCommand("Download PDF file", downloadPDF, "d");})();