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修复copymanga图片错误

处理图片资源加载失败时自动重新加载

当前为 2021-08-18 提交的版本，查看 最新版本。

// ==UserScript==
// @name         修复copymanga图片错误
// @namespace    https://github.com/IronKinoko/copymanga
// @version      1.0.4
// @license      MIT
// @description  处理图片资源加载失败时自动重新加载
// @author       IronKinoko
// @match        https://*.copymanga.com/*
// @icon         https://www.google.com/s2/favicons?domain=copymanga.com
// @grant        none
// ==/UserScript==

(function () {
  'use strict';

  /**
   * @return {Promise<HTMLImageElement[]>}
   */
  async function waitHasComicContent() {
    return new Promise((resolve, reject) => {
      const now = Date.now();
      function getComic() {
        if (Date.now() - now > 5000) reject();
        const imgs = document.querySelectorAll('ul li img');
        if (imgs.length) {
          resolve(imgs);
        } else {
          requestAnimationFrame(getComic);
        }
      }
      getComic();
    })
  }

  async function injectFixImg() {
    const imgs = await waitHasComicContent();

    console.log('注入成功');

    imgs.forEach((img) => {
      img.addEventListener('error', () => {
        console.log('error');
        const url = new URL(img.src);
        url.searchParams.set('t', Date.now());
        img.src = url.toString();
      });
    });
  }

  function $(string) {
    return new DOMParser().parseFromString(string, 'text/html').body.firstChild
  }

  function main() {
    if (window.__copymanga_autofix) return console.log('已经插入过了')
    window.__copymanga_autofix = true;

    if (/comic\/.*\/chapter/.test(location.href)) injectFixImg();

    if (location.pathname.startsWith('/h5')) {
      addH5HistoryListener();
    }
    replaceHeader();
  }

  const _historyWrap = function (type) {
    const orig = history[type];
    const e = new Event(type);
    return function () {
      const rv = orig.apply(this, arguments);
      e.arguments = arguments;
      window.dispatchEvent(e);
      return rv
    }
  };

  async function addH5HistoryListener() {
    history.pushState = _historyWrap('pushState');
    history.replaceState = _historyWrap('replaceState');

    window.addEventListener('pushState', runH5main);
    window.addEventListener('replaceState', runH5main);
    window.addEventListener('popstate', runH5main);
    window.addEventListener('scroll', currentPage);

    runH5main();
  }

  /**
   * @param {Event} e
   */
  async function currentPage() {
    try {
      if (!/h5\/comicContent\/.*/.test(location.href)) return
      const scrollHeight = document.scrollingElement.scrollTop;
      const list = await waitHasComicContent();
      let height = 0;
      for (let i = 0; i < list.length; i++) {
        const item = list[i];
        height += item.getBoundingClientRect().height;
        if (height > scrollHeight) {
          const dom = document.querySelector('.comicContentPopup .comicFixed');
          dom.textContent = dom.textContent.replace(/(.*)\//, `${i + 1}/`);
          break
        }
      }
    } catch (error) {}
  }

  async function runH5main() {
    try {
      if (!/h5\/comicContent\/.*/.test(location.href)) return
      const ulDom = await searchImgListDom();
      const uuid = getComicId();
      const domUUID = ulDom.dataset.uuid;
      if (domUUID !== uuid) {
        ulDom.dataset.uuid = uuid;
        const list = await waitHasComicContent();
        list.forEach((dom) => (dom.dataset.uuid = uuid));
        injectFixImg();
      }

      const main = ulDom.parentElement;
      main.style.position = 'unset';
      main.style.overflowY = 'unset';
    } catch (error) {}
  }

  function getComicId() {
    const [_, uuid] = location.href.match(/h5\/comicContent\/.*\/(.*)/);
    return uuid
  }

  /**
   * @return {Promise<HTMLDivElement>}
   */
  async function searchImgListDom() {
    return new Promise((resolve, reject) => {
      const now = Date.now();
      function _searchImgListDom() {
        if (Date.now() - now > 5000) reject();
        const dom = document.querySelector('.comicContentPopupImageList');
        if (dom) resolve(dom);
        else requestAnimationFrame(_searchImgListDom);
      }
      _searchImgListDom();
    })
  }

  function replaceHeader() {
    const header = document.querySelector('.container.header-log .row');
    if (header) {
      header.style.flexWrap = 'nowrap';
      header.querySelector('div:nth-child(6)').replaceWith(
        $(
          `<div class="col-1">
          <div class="log-txt">
            <a href="/web/person/shujia">我的书架</a>
            <div class="log-unboder"></div>
          </div>
        </div>`
        )
      );
      header.querySelector('div:nth-child(7)').replaceWith(
        $(
          `<div class="col-1">
          <div class="log-txt">
            <a href="/web/person/liulan">我的浏览</a>
            <div class="log-unboder"></div>
          </div>
        </div>`
        )
      );

      header.querySelector('div:nth-child(8)').className = 'col';
      header.querySelector('div.col > div > div').style.justifyContent =
        'flex-end';
    }
  }

  main();

}());