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
// ==UserScript==
// @name 北师硕博论文下载| 北师大毕业论文下载
// @icon https://greasyfork.org/rails/active_storage/blobs/redirect/eyJfcmFpbHMiOnsibWVzc2FnZSI6IkJBaHBBMlh6QVE9PSIsImV4cCI6bnVsbCwicHVyIjoiYmxvYl9pZCJ9fQ==--5acce17eb597998f3d1072d536fcdba41a0e8fde/%E5%9B%BE%E7%89%872.png
// @version 1.1.6
// @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
// ==/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);
}
// 显示提示的功能
function showtoast(msg, duration = 3000) {
var m = document.createElement('div');
m.innerHTML = msg;
m.setAttribute('id', 'msg');
m.style.cssText = "max-width:60%;min-width: 150px;padding:0 14px;min-height: 40px;color: rgb(255, 255, 255);line-height: 40px;text-align: center;border-radius: 4px;position: fixed;top: 50%;left: 50%;transform: translate(-50%, -50%);z-index: 9999999999;background: rgba(0, 0, 0,.7);font-size: 16px;";
document.body.appendChild(m);
setTimeout(() => {
var d = 0.5;
m.style.webkitTransition = '-webkit-transform ' + d + 's ease-in, opacity ' + d + 's ease-in';
m.style.opacity = '0';
setTimeout(() => { document.body.removeChild(document.querySelector("#msg")) }, d * 1000);
}, duration);
}
const Controllerdocs = {
// PDF 合并功能进度展示代码
addStyle: function (data, id = null) {
var addStyle = document.createElement('style');
addStyle.textContent = data;
addStyle.type = 'text/css';
addStyle.id = id;
var doc = document.head || document.documentElement;
doc.appendChild(addStyle);
}
}
// 下载PDF按钮的UI设计
var css = `
.downloadbutton {color: black;transition: color 0.3s ease;}
.downloadbutton:hover {color: orange;rgb(255,122,0)}`;
const addButtonStyle = Controllerdocs.addStyle(css);
// 合并pdf过程中的UI
async function addProgressBar() {
return new Promise((resolve) => {
var DownloadElement = document.querySelector('.toolbar-lf:last-child');
var newDiv = document.createElement('div');
newDiv.setAttribute('class', 'progress_show');
var newProgress = document.createElement('progress');
newProgress.setAttribute('max', '100');
newProgress.setAttribute('value', '0');
newProgress.setAttribute('id', 'pg');
newDiv.appendChild(newProgress);
DownloadElement.appendChild(newDiv);
var css_progress = `#pg {width:78px;height:16px}`
Controllerdocs.addStyle(css_progress, "pg_style");
resolve('进度条加载成功');
})
}
function removeProgressBar() {
var progressDiv = document.querySelector('.progress_show');
if (progressDiv) {
progressDiv.parentNode.removeChild(progressDiv);
} else {
pass;
}
}
function add_img_url() {
// 加载页面图片的所有链接
return new Promise((resolve) => {
showtoast('正在获取数据中，请勿操作', 500)
document.getElementById('btnfirst').click(); // 返回首页
let checkImages = () => {
var img_database = document.querySelectorAll('[id^="ViewContainer_BG_"]');
var TotalPage = parseInt((document.getElementById('totalPages').innerText).match(/\d+/)[0]);
// console.log('Number of images:', img_database.length);
// img_url 空值检查
var imgList = Array();
for (let i = 0; i < img_database.length; i++) {
imgList[i] = img_database[i].currentSrc;
}
if (img_database.length !== TotalPage || imgList.includes('')) {
setTimeout(() => {
showtoast('正在获取数据中，请勿操作', 500);
document.getElementById('btnnext').click();
checkImages();
}, 500); // 间隔0.5秒翻页
} else {
document.getElementById('btnnext').click();
// console.log('准备制作PDF的IMG储备完毕');
// console.log(imgList);
resolve('图片链接加载成功');
}
};
checkImages();
});
}
function loadImage(url) {
// 图片加载转换为图像二进制文件
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
if (document.querySelectorAll('[id^="ViewContainer_BG_"]').length != parseInt((document.getElementById('totalPages').innerText).match(/\d+/)[0])) {
await add_img_url();
}
await addProgressBar();
showtoast('图像信息处理中，您可以正常浏览该论文页面，我正在努力合并成PDF中，请稍后~', 5000)
// pdf 图片下载
var imgList = Array();
var img_database = document.querySelectorAll('[id^="ViewContainer_BG_"]');
for (let i = 0; i < img_database.length; i++) {
imgList[i] = img_database[i].currentSrc;
}
var imgData = new Array();
for (var i = 0; i < imgList.length; i++) {
var link = imgList[i];
// console.log("获取第" + (i+1) + "张图片");
var pg = document.getElementById('pg');
pg.value = (i + 1) / imgList.length * 100;
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);
removeProgressBar();
}
// 绑定下载按钮
$(document).ready(function () {
$(".downloadbutton").on("click", function () {
download();
});
});
addbutton();
})
})()