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不翻墙下，更快加载 imhentai.xxx 的图片
当前为
// ==UserScript==
// @name For Imhentai
// @namespace http://tampermonkey.net/
// @version 1.0
// @description 不翻墙下，更快加载 imhentai.xxx 的图片
// @author 水母
// @match https://imhentai.xxx/gallery/*
// @icon data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==
// @grant none
// @license MIT
// ==/UserScript==
(function () {
'use strict';
// Your code here...
const IS_DEBUG = false;
// 全局数据
let IS_RUN = false;
let IS_PAGE_LOADING = false; // 加锁
// 页码序列 [cover.jpg, 1.jpg, ..., 30.jpg] : 页数总数定为 30; 数组 [0] 定为 cover; cover 不一定加载
let CURRENT_PAGE = 0; // 当前页码
let MAX_BROWSE_PAGE = 0; // 最大浏览的页码，只增
let PAGE_LOADED = 0; // 已加载的页码
let PAGE_LOAD_STEP = IS_DEBUG ? 2 : 5; // 每次加载页数
let SCALE = IS_DEBUG ? 0.3 : 1; // 图片整体缩放
// class
function BzData(
name_en = 'Null',
name_sub = 'Null',
page = 0,
root_url = '',
imgInfoList = [],
types = ['.jpg', '.png', '.gif', '.err']
) {
this.name_en = name_en;
this.name_sub = name_sub;
this.page = page;
this.root_url = root_url;
this.imgInfoList = imgInfoList;
this.types = types;
}
// imgInfoList[ImgInfo]
function ImgInfo(
imgName,
imgAlt,
imgUrl = '',
imgType = '',
width = 0,
height = 0,
SCALE = 1
) {
this.imgName = imgName;
this.imgAlt = !imgAlt ? imgName : imgAlt;
this.imgUrl = imgUrl;
this.imgType = imgType;
this.width = width;
this.height = height;
this.SCALE = SCALE;
}
// 迭代器
function* BzDataIterator(bzData) {
let index = 0;
while (index < bzData.imgInfoList.length) {
let imgInfo = bzData.imgInfoList[index];
yield [index++, bzData.root_url, imgInfo];
}
yield [undefined, undefined, undefined];
}
// let bzDataIterator;
//漫画名去特殊字符处理
function processFilename(filename) {
return filename
.replaceAll('\\', '-')
.replaceAll('/', '-')
.replaceAll(':', '：')
.replaceAll('*', '-')
.replaceAll('?', '？')
.replaceAll('"', '“')
.replaceAll('<', '《')
.replaceAll('>', '》')
.replaceAll('|', '~');
}
// 判断图片 url 有效与否
function verifyImgExists(imgUrl) {
return new Promise((resolve, reject) => {
let ImgObj = new Image();
ImgObj.src = imgUrl;
ImgObj.onload = () => resolve(ImgObj);
ImgObj.onerror = (rej) => reject(rej);
});
}
// 为 ImgInfo 生成有效 url
async function processImgInfoAsync(
root_url,
imgInfo,
types = ['.jpg', '.png', '.gif', '.err']
) {
// 测试三种后缀
for (let type of types) {
imgInfo.imgUrl = root_url + imgInfo.imgName + type;
imgInfo.imgType = type;
try {
let ImgObj = await verifyImgExists(imgInfo.imgUrl);
imgInfo.width = ImgObj.width;
imgInfo.height = ImgObj.height;
// console.log(imgInfo);
break;
} catch (e) {
continue; // 未测试最后一个，继续
}
}
}
// 迭代器处理图片序列
async function processImgAsync(bzDataIterator) {
let loadCount;
for (let i = 0; i < PAGE_LOAD_STEP; i++) {
const [index, root_url, imgInfo] = bzDataIterator.next().value;
if (!index) break;
await processImgInfoAsync(root_url, imgInfo);
loadCount = index;
if (IS_DEBUG) console.log(`${index}:`, imgInfo);
}
PAGE_LOADED = loadCount;
IS_PAGE_LOADING = false;
}
// 获取漫画名、页数、图片的 url
function initData() {
let bzData = new BzData();
let coverUrl;
// cover
if (!IS_DEBUG) {
bzData = new BzData();
bzData.imgInfoList.push(new ImgInfo('cover'));
const tag_div_main = document.querySelectorAll(
'body > div.overlay > div.container > div.row.gallery_first > div'
);
// 获取漫画名
bzData.name_en = tag_div_main[1].querySelector('h1').textContent;
bzData.name_sub = tag_div_main[1].querySelector('p.subtitle').textContent;
// 漫画名去特殊字符处理
if (bzData.name_en !== '') {
bzData.name_en = processFilename(bzData.name_en);
}
if (bzData.name_sub !== '') {
bzData.name_sub = processFilename(bzData.name_sub);
}
// 获取页数
let page_str = tag_div_main[1].querySelector('li.pages').textContent;
bzData.page = Number.parseInt(page_str.match(/Pages: ([0-9]*)/i)[1]);
// 图片序列的 url 前缀与封面 url 的相同，
// eg.封面 url=https://m7.imhentai.xxx/023/mnsiote3jg/cover.jpg
// eg.序列的 url=https://m7.imhentai.xxx/023/mnsiote3jg/
coverUrl = tag_div_main[0].querySelector('img').dataset.src;
bzData.root_url = coverUrl.slice(0, coverUrl.lastIndexOf('/') + 1);
// 图片序列的 url 生成,
// eg: https://m6.imhentai.xxx/021/fh5n1d304g/1.jpg
for (let p = 1; p <= bzData.page; p++) {
bzData.imgInfoList.push(new ImgInfo(p.toString())); // 图片名未编码，数字序列就行
}
}
let bzDataIterator = BzDataIterator(bzData);
// 初始化 cover 数据，让 CURRENT_PAGE 与 PAGE_LOADED 能够对齐
let [index, root_url, coverInfo] = bzDataIterator.next().value;
let ImgObj = new Image();
ImgObj.src = coverUrl;
ImgObj.onload = () => {
coverInfo.width = ImgObj.width;
coverInfo.height = ImgObj.height;
};
coverInfo.imgUrl = coverUrl;
if (IS_DEBUG) console.log(coverInfo);
return [bzData, bzDataIterator];
}
// 初始化组件
function initComponents(bzData, bzDataIterator) {
// <img>
const newImg = document.createElement('img');
newImg.id = 'can-img';
newImg.style = `
-webkit-user-select: none;
margin:0 auto;
transition: background-color 300ms;
`;
// <input>
const changePageInput = document.createElement('input');
changePageInput.id = 'can-input';
changePageInput.type = 'number';
changePageInput.value = `${CURRENT_PAGE}`;
changePageInput.disabled = true;
changePageInput.style = `
width: 45%;height: 80%;
font-size:18px;text-align:center;
`;
// <label>
const pageLabel = document.createElement('label');
pageLabel.id = 'can-page';
pageLabel.style =
'width: 55%;height: 80%;font-size:18px;text-align:center;margin: 0;background-color: hsla(0, 0%, 90%, 90%);';
pageLabel.textContent = `[ ${PAGE_LOADED} ]`;
// <button>
const runBtn = document.createElement('button');
const previousBtn = document.createElement('button');
const nextBtn = document.createElement('button');
const downloadBtn = document.createElement('button');
const scaleUpBtn = document.createElement('button');
const scaleResetBtn = document.createElement('button');
const scaleDownBtn = document.createElement('button');
runBtn.id = 'run';
previousBtn.id = 'pre';
nextBtn.id = 'next';
downloadBtn.id = 'down';
scaleUpBtn.id = 'sUp';
scaleResetBtn.id = 'sReset';
scaleDownBtn.id = 'sDown';
runBtn.textContent = '启动';
previousBtn.textContent = '◁';
nextBtn.textContent = '▷';
downloadBtn.textContent = '辅助下载';
scaleUpBtn.textContent = '△';
scaleResetBtn.textContent = '○';
scaleDownBtn.textContent = '▽';
runBtn.addEventListener('click', (evt) => {
evt.stopPropagation();
if (!IS_RUN) {
IS_RUN = true;
evt.target.textContent = `原页 ${bzData.page}`;
// 生效按钮
let btns = document
.querySelector('#can-app')
.querySelectorAll('button');
for (const btn of btns) {
btn.disabled = false;
}
let inputPage = document.querySelector('#can-input');
inputPage.disabled = false;
// 显示 新 <img>
let _newImg = document.querySelector('#can-div-img');
_newImg.style.display = 'block';
} else {
IS_RUN = false;
evt.target.textContent = '启动';
// 无效按钮
let btns = document
.querySelector('#can-app')
.querySelectorAll('button');
for (const btn of btns) {
btn.disabled = btn.id !== 'run' ? true : false;
}
let inputPage = document.querySelector('#can-input');
inputPage.disabled = true;
// 隐藏新 <img>
let _newImg = document.querySelector('#can-div-img');
_newImg.style.display = 'none';
}
});
previousBtn.addEventListener('click', (evt) => {
evt.stopPropagation();
let imgInfo =
bzData.imgInfoList[
CURRENT_PAGE > 0 ? --CURRENT_PAGE : (CURRENT_PAGE = MAX_BROWSE_PAGE)
];
updateImgTag(imgInfo);
let inputPage = document.querySelector('#can-input');
let page_ = document.querySelector('#can-page');
inputPage.value = CURRENT_PAGE;
page_.textContent = `[ ${PAGE_LOADED} ]`;
});
// next 会触发图片的 lazy load
nextBtn.addEventListener('click', (evt) => {
evt.stopPropagation();
// 如果
// 未加锁 && 页码加载未完全 && 正访问超出已加载的页码
// 添加步数个新 imgInfo
if (
!IS_PAGE_LOADING &&
PAGE_LOADED !== bzData.page &&
CURRENT_PAGE === PAGE_LOADED
) {
IS_PAGE_LOADING = true;
processImgAsync(bzDataIterator);
} else {
let imgInfo =
bzData.imgInfoList[
CURRENT_PAGE < PAGE_LOADED ? ++CURRENT_PAGE : (CURRENT_PAGE = 0)
];
updateImgTag(imgInfo);
let inputPage = document.querySelector('#can-input');
let page_ = document.querySelector('#can-page');
inputPage.value = CURRENT_PAGE;
page_.textContent = `[ ${PAGE_LOADED} ]`;
}
if (MAX_BROWSE_PAGE < CURRENT_PAGE) MAX_BROWSE_PAGE = CURRENT_PAGE;
});
downloadBtn.addEventListener('click', (evt) => {
evt.stopPropagation();
const stringData = JSON.stringify(bzData, null, 2);
// dada 表示要转换的字符串数据，type 表示要转换的数据格式
const blob = new Blob([stringData], {
type: 'application/json',
});
// 根据 blob生成 url链接
const objectURL = URL.createObjectURL(blob);
// 通过 a 标签下载
const aTag = document.createElement('a');
aTag.href = objectURL;
aTag.download = 'PicLinks.json';
aTag.click();
aTag.remove();
// 释放 URL 对象
URL.revokeObjectURL(objectURL);
});
scaleUpBtn.addEventListener('click', (evt) => {
evt.stopPropagation();
SCALE += SCALE < 3 ? 0.1 : 0;
let imgInfo = bzData.imgInfoList[CURRENT_PAGE];
updateImgTag(imgInfo);
});
scaleResetBtn.addEventListener('click', (evt) => {
evt.stopPropagation();
SCALE = 1;
let imgInfo = bzData.imgInfoList[CURRENT_PAGE];
updateImgTag(imgInfo);
});
scaleDownBtn.addEventListener('click', (evt) => {
evt.stopPropagation();
SCALE -= SCALE > 0.3 ? 0.1 : 0;
let imgInfo = bzData.imgInfoList[CURRENT_PAGE];
updateImgTag(imgInfo);
});
changePageInput.addEventListener('change', (evt) => {
evt.stopPropagation();
if (0 <= evt.target.value && evt.target.value <= bzData.page) {
CURRENT_PAGE = evt.target.value;
let imgInfo = bzData.imgInfoList[CURRENT_PAGE];
updateImgTag(imgInfo);
}
});
const app = document.createElement('div');
app.id = 'can-app';
app.style = `
font-size:20px; color:HotPink;
width:120px; height:200px; background-color:hsla(0, 0%, 90%, 50%);
display:flex; flex-direction:column; justify-content:space-between;
position:fixed; top:40%; z-index:1000002; transform:translateX(calc(-50% * var(--direction))) translateY(-50%);
`;
const div_tool = document.createElement('div');
div_tool.style = `
display:flex; flex-direction:column; justify-content:space-between;
height:160px; background-color:hsla(0, 0%, 90%, 50%);
`;
const div_scale = document.createElement('div');
div_scale.style = `
display:flex; flex-direction:row; justify-content:space-between;
`;
const div_page = document.createElement('div');
div_page.style = `
align-items:center;
display:flex; flex-direction:row; justify-content:space-between;
`;
app.appendChild(runBtn);
div_tool.appendChild(previousBtn);
div_tool.appendChild(nextBtn);
div_scale.appendChild(scaleUpBtn);
div_scale.appendChild(scaleResetBtn);
div_scale.appendChild(scaleDownBtn);
div_tool.appendChild(div_scale);
div_page.appendChild(changePageInput);
div_page.appendChild(pageLabel);
div_tool.appendChild(div_page);
div_tool.appendChild(downloadBtn);
app.appendChild(div_tool);
document.body.appendChild(app);
// 包裹 <img> 并悬浮居中
const div_img = document.createElement('div');
div_img.id = 'can-div-img';
// 粉色
div_img.style = `
display:none;
position: fixed;overflow: auto;
width: 80%;height: 100%;top: 0%;z-index: 1000001;
left: 0;right: 0;margin:0 auto;text-align: center;
background-color: hsla(338, 100%, 70%, 0.8);
`;
div_img.appendChild(newImg);
document.body.appendChild(div_img);
// loading 初始隐藏
// document.body.insertAdjacentHTML('beforeend', LOADING_SVG);
let btns = document.querySelector('#can-app').querySelectorAll('button');
for (const btn of btns) {
btn.style = 'font-size:20px; color:HotPink;';
btn.disabled = btn.id !== 'run' ? true : false;
}
}
// 更新 <img>
function updateImgTag(imgInfo) {
let newImg_ = document.querySelector('#can-img');
newImg_.src = imgInfo.imgUrl;
newImg_.alt = imgInfo.imgAlt;
if (imgInfo.imgType !== '.err') {
// 使用 * 缩放应该在 <原数值> 上变化
newImg_.width = imgInfo.width * SCALE;
newImg_.height = imgInfo.height * SCALE;
} else {
newImg_.style.removeProperty('width');
newImg_.style.removeProperty('height');
}
}
initComponents(...initData());
})();