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本程序仅因北师大在线pdf文档无法在线标记而制作，严格禁止下载文件外传，请务必配合
当前为
// ==UserScript==
// @name 北师硕博论文下载器
// @version 1.0.0
// @namespace https://bnu.edu.cn
// @description 本程序仅因北师大在线pdf文档无法在线标记而制作，严格禁止下载文件外传，请务必配合
// @author None 佚名
// @antifeature 需要登录图书馆论文版权系统才能导出PDF
// @require https://cdn.bootcss.com/jquery/3.5.1/jquery.min.js
// @require https://cdnjs.cloudflare.com/ajax/libs/jspdf/1.3.2/jspdf.debug.js
// @require https://cdn.staticfile.org/html2canvas/1.4.1/html2canvas.min.js
// @match *://etdlib.bnu.edu.cn/read/*
// @license Apache-2.0
// @grant unsafeWindow
// ==/UserScript==
(function () {
console.log('Thesis helper loaded');
'use strict';
$(function () {
console.log('Thesis helper loaded');
function addbutton() {
// 页面增加下载按钮
var topElement = document.querySelector('.pdf-top-con');
// 添加toolif
var newGroup = document.createElement('div');
newGroup.setAttribute('class', 'toolbar-lf');
// 添加分隔符
var fgElement = document.createElement('div');
fgElement.setAttribute('class', 'toolbar-separator');
// 添加下载button
var newAnchorElement = document.createElement('a');
newAnchorElement.setAttribute('class', 'downloadbutton');
newAnchorElement.setAttribute('onclick', 'download();');
var newParagraphElement = document.createElement('p');
newParagraphElement.innerHTML = '📩 下载PDF';
newAnchorElement.appendChild(newParagraphElement);
topElement.appendChild(newGroup);
newGroup.appendChild(fgElement);
newGroup.appendChild(newAnchorElement);
topElement.appendChild(newGroup);
}
function add_img_url() {
return new Promise((resolve) => {
document.getElementById('btnfirst').click(); // 返回首页
let checkImages = () => {
let img_database = document.querySelectorAll('img');
var TotalPage = parseInt((document.getElementById('totalPages').innerText).match(/\d+/)[0]);
console.log('Number of images:', img_database.length);
if (img_database.length !== TotalPage) {
TotalPage = parseInt((document.getElementById('totalPages').innerText).match(/\d+/)[0]);
setTimeout(() => {
document.getElementById('btnnext').click();
checkImages();
}, 1000);
} else {
console.log('准备制作PDF的IMG储备完毕');
resolve('图片链接加载成功');
}
};
checkImages();
});
}
function loadImage(url) {
// 图片加载
return new Promise((resolve, reject) => {
var img = new Image();
var data;
img.setAttribute("crossOrigin", "Anonymous");
img.src = url;
img.onError = function () {
throw new Error('Cannot load image: "' + url + '"');
};
img.onload = function () {
var canvas = document.createElement("canvas");
document.body.appendChild(canvas);
canvas.width = img.width;
canvas.height = img.height;
var ctx = canvas.getContext("2d");
ctx.drawImage(img, 0, 0);
// Grab the image as a jpeg encoded in base64, but only the data
data = canvas
.toDataURL("image/jpeg")
.slice("data:image/jpeg;base64,".length);
// Convert the data to binary form
data = atob(data);
document.body.removeChild(canvas);
resolve(data);
};
});
}
async function download() {
// 加载img_url
await add_img_url();
alert('页面信息已获取完毕，正在合并为PDF，稍后将弹出PDF下载界面')
// pdf 图片下载
var imgList = Array();
var img_database = document.querySelectorAll('img');
for (let i = 0; i < img_database.length; i++) {
imgList[i] = img_database[i].currentSrc;
}
// console.log(imgList)
var imgData = new Array();
for (var i = 0; i < imgList.length; i++) {
var link = imgList[i];
console.log("获取第" + i + "张图片");
await loadImage(link).then((data) => {
imgData.push(data);
});
}
// pdf 图片合并为pdf
console.log("正在合并图片为PDF");
var contentWidth = parseFloat(document.getElementById('PageContainer_0').style.width.replace('px', ''))
var contentHeight = parseFloat(document.getElementById('PageContainer_0').style.height.replace('px', ''))
const orientation = contentWidth > contentHeight ? 'l' : 'p';
var doc = new jsPDF({
orientation: orientation,
unit: "px",
format: [contentWidth, contentHeight],
});
const namepdf = document.getElementById('infoname').value
const output = namepdf + ".pdf";
let idx = 0;
imgData.forEach((e) => {
idx++;
doc.addImage(e, "JPG", 0, 0, contentWidth, contentHeight);
if (idx < imgData.length) {
doc.addPage();
}
});
doc.save(output);
}
// 绑定下载按钮
$(document).ready(function() {
$(".downloadbutton").on("click", function() {
download();
});
});
addbutton();
})
})()