Batch Download as PDF instead of ZIP
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// ==UserScript==
// @name Picviewer CE+ PDF addon
// @name:zh-CN Picviewer CE+ PDF 扩展
// @name:zh-TW Picviewer CE+ PDF 擴充
// @namespace https://github.com/hoothin/UserScripts
// @version 2024-06-20
// @description Batch Download as PDF instead of ZIP
// @description:zh-CN 取代 ZIP， 打包下载时下载为 PDF
// @description:zh-TW 取代 ZIP， 打包下載時下載為 PDF
// @author hoothin
// @match *://*/*
// @icon data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==
// @grant unsafeWindow
// @require https://unpkg.com/jspdf@latest/dist/jspdf.umd.min.js
// ==/UserScript==
(function() {
'use strict';
async function blobToDataURL(blob) {
return new Promise((resolve) => {
setTimeout(() => {
var a = new FileReader();
a.readAsDataURL(blob);
a.onload = function (e) {
resolve(e.target.result);
};
a.onerror = function (e) {
resolve(null);
};
}, 0);
});
}
function img2pdf(pdfName) {
if (!(this instanceof img2pdf)) {
return new img2pdf();
}
this.fileList = [];
this.file = async (fileName, blob) => {
this.fileList.push([fileName, blob]);
};
this.generateAsync = async (config, progress) => {
const pdf = new window.jspdf.jsPDF();
const fileLength = this.fileList.length;
for (const [key, param] of this.fileList.entries()) {
const fileName = param[0];
let blob = param[1];
let dataUrl = await blobToDataURL(blob);
const imgProps = pdf.getImageProperties(dataUrl);
const pdfWidth = pdf.internal.pageSize.getWidth();
const pdfHeight = (imgProps.height * pdfWidth) / imgProps.width;
pdf.addImage(dataUrl, blob.type, 0, 0, pdfWidth, pdfHeight);
progress({percent: (key + 1) / fileLength * 100, currentFile: fileName});
if (key + 1 < fileLength) {
pdf.addPage();
}
}
pdf.save(pdfName);
};
}
const _unsafeWindow = typeof unsafeWindow === 'undefined' ? window : unsafeWindow;
_unsafeWindow.pvcepimg2pdf = img2pdf;
})();