// ==UserScript==
// @name kill-e-book
// @namespace http://tampermonkey.net/
// @homepage https://github.com/systemmin/kill-doc
// @version 1.0.3
// @description 文泉书局|高教书苑等公开免费电子书下载
// @author Mr.Fang
// @match https://*.wqxuetang.com/deep/read/pdf*
// @match https://ebook.hep.com.cn/index.html*
// @require https://lf6-cdn-tos.bytecdntp.com/cdn/expire-1-M/jspdf/2.4.0/jspdf.umd.min.js
// @require https://unpkg.com/@zip.js/zip.js@2.7.34/dist/zip.min.js
// @icon https://dtking.cn/favicon.ico
// @run-at document-idle
// @grant none
// @license Apache-2.0
// ==/UserScript==
(function() {
'use strict';
let MF =
'#MF_fixed{position:fixed;top:50%;transform:translateY(-50%);right:20px;gap:10px;flex-direction:column;z-index:2147483647;display:flex}';
MF +=
'.MF_box{padding:10px;cursor:pointer;border-color:rgb(0,102,255);border-radius:5px;background-color:white;color:rgb(0,102,255);}.MF_active{color: green}#MF_k_page_no,#MF_k_page_size{color: red;}';
const prefix = "MF_";
// canvas 禁止重写 drawImage
const canvasRenderingContext2DPrototype = CanvasRenderingContext2D.prototype;
const originalDrawImage = canvasRenderingContext2DPrototype.drawImage;
Object.defineProperty(canvasRenderingContext2DPrototype, 'drawImage', {
value: originalDrawImage,
writable: false,
configurable: false
});
class Box {
id = ""; // id
label = ""; // 按钮文本
title = "";
fun = ""; // 执行方法
constructor(id, label, fun) {
this.id = id;
this.label = label;
this.fun = fun;
}
setTitle(title) {
this.title = title;
return this;
}
}
class Utility {
debug = true;
/**
* 添加 css 样式
* @param e 节点
* @param data JSON 格式样式
*/
style(e, data) {
Object.keys(data).forEach(key => {
e.style[key] = data[key]
})
}
attr(e, key, val) {
if (!val) {
return e.getAttribute(key);
} else {
e.setAttribute(key, val);
}
}
/**
* 追加样式
* @param css 格式样式
*/
appendStyle(css) {
let style = this.createEl('', 'style');
style.textContent = css;
style.type = 'text/css';
let dom = document.head || document.documentElement;
dom.appendChild(style);
}
/**
* @description 创建 dom
* @param id 必填
* @param elType
* @param data
*/
createEl(id, elType, data) {
const el = document.createElement(elType);
el.id = id || '';
if (data) {
this.style(el, data);
}
return el;
}
query(el) {
return document.querySelector(el);
}
queryAll(el) {
return document.querySelectorAll(el);
}
update(el, text) {
const elNode = this.query(el);
if (!elNode) {
console.log('节点不存在');
} else {
elNode.innerHTML = text;
}
}
/**
* 进度
* @param current 当前数量 -1预览结束
* @param total 总数量
* @param content 内容
*/
preview(current, total, content) {
return new Promise(async (resolve, reject) => {
if (current === -1) {
this.update('#' + prefix + 'text', content ? content : "已完成");
} else {
let p = (current / total) * 100;
let ps = p.toFixed(0) > 100 ? 100 : p.toFixed(0);
console.log('当前进度', ps)
this.update('#' + prefix + 'text', '进度' + ps + '%');
await this.sleep(500);
resolve();
}
})
}
preText(content) {
this.update('#' + prefix + 'text', content);
}
gui(boxs) {
const box = this.createEl(prefix + "fixed", 'div');
for (let x in boxs) {
let item = boxs[x];
if (!item.id) continue;
let el = this.createEl(prefix + item.id, 'button');
if (item.title) {
el.title = item.title;
}
el.append(new Text(item.label));
if (x === '0') {
el.classList = prefix + 'box ' + prefix + "active";
} else {
el.className = prefix + "box";
}
if (item.fun) {
el.onclick = function() {
eval(item.fun);
}
}
if (item.id === 'k_page_no') {
this.attr(el, 'contenteditable', true)
}
if (item.id === 'k_page_size') {
this.attr(el, 'contenteditable', true)
}
box.append(el);
}
document.body.append(box);
}
sleep(ms) {
return new Promise(resolve => setTimeout(resolve, ms));
}
log(msg) {
if (this.debug) {
console.log(msg);
}
}
logt(msg) {
if (this.debug) {
console.table(msg);
}
}
}
const u = new Utility();
u.appendStyle(MF);
const btns = [
new Box('text', '状态 0 %'),
new Box('k_page_no', '1').setTitle('指定页码，从第几页开始'),
new Box('k_page_size', '100').setTitle('指定每次下载多少页面'), ,
new Box('handleStart', '开始执行', 'handleStart()'),
new Box('handleClean', '结束执行', 'handleClean()'),
new Box('start', '继续预览', 'autoPreview()'),
new Box('stop', '停止预览', 'stopPreview()'),
new Box('pdf', '下载PDF', 'download()')
]
const domain = {
wqxuetang: 'wqxuetang.com',
ebook: 'ebook.hep.com.cn',
};
const {
host,
href,
origin
} = window.location;
const jsPDF = jspdf.jsPDF;
const doc = new jsPDF({
orientation: 'p',
unit: 'px',
compress: true
});
// 794 x 1123 px
let pdf_w = 446,
pdf_h = 631,
loading = 500, // 毫秒
pdf_ratio = 0.56,
title = document.title,
select = null,
selectPages = null,
observeClassName = null,
dom = null,
params = null,
interval = null;
// ，页码，几次
let k_page_size = 0, // 页面容量
k_count = 0, // 计次=第几次分页
k_total = 0; // 计数=每次分页预览数量
const lastIndex = href.lastIndexOf('?')
if (lastIndex != -1) {
params = new URLSearchParams(href.substring(lastIndex));
}
/**
* @description 初始化方法
* @author Mr.Fang
* @time 2024年2月2日
*/
const init = () => {
console.table({
host,
href,
origin
})
dom = document.documentElement || document.body;
if (host.includes(domain.wqxuetang)) {
select = "#pagebox .page-lmg";
selectPages = ".page-head-tol";
observeClassName = "page-lmg";
dom = u.query('#scroll');
} else if (host.includes(domain.ebook)) {
if (!params)
return;
if (href.includes('detail')) {
setTimeout(() => {
localStorage.setItem('title', u.query('.bookName').innerText)
}, 1000)
return;
}
select = ".pdf-main .pdf-page";
selectPages = ".toolbar-process";
observeClassName = "pdf-reader";
dom = u.query('#viewerContainer');
}
u.gui(btns);
console.log('文件名称：', title);
}
// load 事件
document.onreadystatechange = function() {
if (document.readyState === "complete") {
init()
const k_start = localStorage.getItem('k_start');
k_count = Number(localStorage.getItem('k_count')) || 0;
k_page_size = Number(localStorage.getItem('k_page_size')) || 0;
if (k_start) {
setTimeout(() => {
autoPreview();
}, 2000)
}
loginfo()
}
};
/**
* @description 前置方法
* @author Mr.Fang
* @time 2024年2月2日
*/
const before = () => {
console.log('before=============>')
if (host.includes(domain.wqxuetang)) {
if (u.query('.reload_image')) {
console.log('重新加载')
u.query('.reload_image').click();
}
}
}
/**
* @description 后置方法
* @author Mr.Fang
* @time 2024年2月2日
*/
const after = () => {
console.log('after=============>')
if (host.includes(domain.wqxuetang)) {
title = u.query('.read-header-title').innerText;
} else if (host.includes(domain.ebook)) {
let t = localStorage.getItem('title');
if (t) {
title = t;
}
}
}
/**
* @description 开始执行
*/
const handleStart = () => {
console.log('handleStart=============>')
// 重新设置页码参数
const k_page_no = Number(u.query('#MF_k_page_no').innerText) - 1;
if (k_page_no > 0) {
localStorage.setItem('k_page_no', k_page_no)
} else {
localStorage.setItem('k_page_no', 0)
}
// 设置页面容量
k_page_size = localStorage.getItem('k_page_size');
const size = Number(u.query('#MF_k_page_size').innerText);
if (size > 0) {
k_page_size = size
}
localStorage.setItem('k_page_size', k_page_size)
u.update('#MF_k_page_size', k_page_size)
// 自动预览
autoPreview();
}
/**
* @description 清空缓存数据
*/
const handleClean = () => {
console.log('handleClean=============>')
stopPreview();
k_total = 0;
k_count = 0;
localStorage.removeItem('k_page_size')
localStorage.removeItem('k_page_no')
localStorage.removeItem('k_count')
localStorage.removeItem('k_total')
localStorage.removeItem('k_start')
u.preview(-1, null, "已终止");
}
const loginfo = () => {
console.log('k_page_size', localStorage.getItem('k_page_size'))
console.log('k_page_no', localStorage.getItem('k_page_no'))
console.log('k_count', localStorage.getItem('k_count'))
console.log('k_total', k_total)
}
/**
* @description 开始方法，自动预览
* @author Mr.Fang
* @time 2024年2月2日
*/
const autoPreview = async () => {
// 开始执行标识
localStorage.setItem('k_start', '1');
// 初始化页码
if (host.includes(domain.wqxuetang)) {
}
// 自动翻页
await autoPager()
}
/**
* @description 结束方法，停止预览
* @author Mr.Fang
* @time 2024年2月2日
*/
const stopPreview = async () => {
console.log('stopPreview=============>')
if (interval) {
clearInterval(interval);
interval = null;
}
localStorage.removeItem('k_start')
}
/**
* 判断 dom 是否在可视范围内
*/
const isVisible = (el) => {
const rect = el.getBoundingClientRect();
return (
rect.top >= 0 && rect.top <= (window.innerHeight || document.documentElement.clientHeight)
);
}
// wq 保存图片
const saveImagePDF = async (els, i) => {
localStorage.setItem('k_page_no', i + 1);
let canvas;
if (host.includes(domain.wqxuetang)) {
canvas = await MF_ImageJoinToBlob(els);
} else if (host.includes(domain.ebook)) {
canvas = await MF_ImageToBase64(els.src);
}
doc.addPage();
doc.addImage(canvas, 'JPEG', 0, 0, pdf_w, pdf_h, i, 'FAST')
if (doc.internal.pages[1].length === 2) {
doc.deletePage(1); // 删除空白页
}
k_total++;
// 更新dom
u.update('#MF_k_page_size', k_page_size)
u.update('#MF_k_page_no', i + 1)
}
/**
* @description 自动翻页
*/
const autoPager = async () => {
if (!localStorage.getItem("k_start")) {
u.preview(-1, null, "已停止");
return;
}
before()
/**
* @description 图片是否加载完成
* @param {HTMLImageElement} img 图片节点
*/
const imageComplete = (img) => {
return img.complete && img.naturalWidth > 0 && img.naturalHeight > 0;
}
/**
* @description 所有字加载完成
* @param {HTMLElement} nodes 孩子节点
*/
const nodeComplete = (nodes) => {
if (!nodes.length) return false;
for (let i = 0; i < nodes.length; i++) {
if (!imageComplete(nodes[i])) return false;
}
return true;
}
//======================== 前置条件判断
// 当前页码
const nodes = u.queryAll(select);
const length = nodes.length;
const k_page_no = Number(localStorage.getItem('k_page_no')) || 0;
// 多增加一页码，防止缺页
if (k_total % k_page_size === 0 && k_total != 0) { // 满足分页条件
download().then(() => {
localStorage.setItem('k_count', k_count + 1);
window.location.reload()
});
return;
}
try {
const node = nodes[k_page_no];
if (host.includes(domain.wqxuetang)) {
if (nodeComplete(node.children)) {
// 保存
await saveImagePDF(node, k_page_no)
// 滚动到下一个范围
if (k_page_no !== length - 1) {
nodes[k_page_no + 1].scrollIntoView({
behavior: "smooth"
});
}
} else {
nodes[k_page_no].scrollIntoView({
behavior: "smooth"
});
}
} else if (host.includes(domain.ebook)) {
const img = node.querySelector('img')
if (isVisible(node) && img) {
// 保存
await saveImagePDF(img, k_page_no)
// 滚动到下一个范围
if (k_page_no !== length - 1) {
nodes[k_page_no + 1].scrollIntoView({
behavior: "smooth"
});
}
} else {
nodes[k_page_no].scrollIntoView({
behavior: "smooth"
});
}
}
u.preview(k_page_no, length);
} catch (e) {
u.preview(-1);
download().then(() => {
handleClean();
})
return;
}
loginfo()
if (k_page_no !== length) { // 继续执行
setTimeout(async () => {
await autoPager()
console.log(loading, 'ms 后执行');
}, loading)
}
}
/**
* @description 下载 PDF
* @author Mr.Fang
* @time 2024年2月2日
*/
const download = () => {
after()
// 下载 PDF 文件
return doc.save(`${title}_${k_count}.pdf`, {
returnPromise: true
});
}
/**
* @description 图片拼接转 blob
* @author Mr.Fang
* @time 2024年6月5日
* @param el 节点对象
* @returns {Promise<blob>}
*/
const MF_ImageJoinToBlob = (el) => {
return new Promise((resolve, reject) => {
const children = el.children;
const {
naturalWidth,
naturalHeight
} = children[0];
// 1、创建画布
let canvas = u.createEl('', 'canvas');
canvas.width = naturalWidth * 6;
canvas.height = naturalHeight;
const ctx = canvas.getContext('2d');
// 2、获取所有图片节点
const listData = []
for (var i = 0; i < children.length; i++) {
const img = children[i];
const left = img.style.left.replace('px', '')
listData.push({
index: i,
left: Number(left)
})
}
listData.sort((a, b) => a.left - b.left);
// 3、遍历绘制画布
for (var i = 0; i < listData.length; i++) {
const img = children[listData[i].index];
ctx.drawImage(img, i * naturalWidth, 0, naturalWidth, naturalHeight);
}
resolve(canvas)
})
}
/**
* @description 加载图片
* @author Mr.Fang
* @time 2024年1月20日18:05:49
* @param src 图片地址
* @returns {Promise<unknown>}
*/
const MF_ImageToBase64 = (src) => {
return new Promise((resolve, reject) => {
const image = new Image();
image.onload = function() {
try {
const canvas = u.createEl('', 'canvas');
const {
naturalWidth: width,
naturalHeight: height
} = image;
canvas.width = width;
canvas.height = height;
let ctx = canvas.getContext('2d');
ctx.fillStyle = '#FFFFFF';
ctx.fillRect(0, 0, width, height);
ctx.drawImage(image, 0, 0, width, height);
resolve(canvas);
} catch (e) {
reject(e);
}
}
image.onerror = reject;
image.src = src;
})
}
/**
* @description 将 blob 对象转 uint8Array
* @author Mr.Fang
* @time 2024年5月27日
* @param {Object} blob 图片对象
* @returns {Promise<Uint8Array>}
*/
const MF_BlobToUint8Array = (blob) => {
return new Promise((resolve, reject) => {
const fileReader = new FileReader();
fileReader.onload = function() {
resolve(new Uint8Array(this.result));
};
fileReader.onerror = function(error) {
reject(error);
};
fileReader.readAsArrayBuffer(blob);
});
}
/**
* @description 画布输出 blob 对象
* @author Mr.Fang
* @time 2024年1月20日18:05:49
* @param src 图片地址
* @returns {Promise<Object>}
*/
const MF_CanvasToBase64 = (canvas) => {
return new Promise((resolve, reject) => {
const {
width,
height
} = canvas;
canvas.toBlob(
(blob) => {
resolve({
blob,
width,
height
});
},
"image/png",
1,
);
})
}
})();
