// ==UserScript==
// @name         文档选中美化
// @namespace    http://tampermonkey.net/
// @version      2.0.2
// @description  MDN/Mysql 文档选中美化
// @author       itxve
// @match        https://*/*
// @icon         data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==
// @grant        none
// @license      MIT
// @downloadURL none
// ==/UserScript==

function Load(predicate, fn) {
  predicate() && fn();
}
//平滑滚动至浏览目录
const scrollRootElement = (rootEle, top) => {
  rootEle.scrollTo({ top, behavior: "smooth" });
};

const MysqlDocSelct = (cssText) => {
  let path = location.pathname.split("/");
  let dom = document.querySelector("a[href='" + path[path.length - 1] + "']");
  dom.style.cssText = cssText;
  scrollRootElement(
    document.querySelector("#docs-sidebar-toc"),
    dom.offsetTop - 50
  );
};

const MDnDocSelect = () => {
  const getPath = (href) => {
    const path = new URL(href).pathname
      .split("/")
      .filter((_, i) => i > 1)
      .join("/");
    return "/" + path;
  };

  const task = () => {
    // Your code here...
    const activeStyle = `color: var(--text-primary);font-weight: 600;
       border-left: 4px solid #1870F0;
       background-color: var(--category-color-background);`;

    const detailsStyle = `color: var(--text-primary);font-weight: 800;
       border-left: 3px solid var(--text-link);
       background-color: var(--category-color-background);`;

    const rootElement = document.querySelector("#sidebar-quicklinks");

    const offTop = 120;

    //展开
    const openTheParent = (adom) => {
      const maxFind = 5;
      let findCOunt = 0;
      while (findCOunt < maxFind) {
        if (adom && adom.tagName !== "DETAILS") {
          adom = adom.parentElement;
        }
        findCOunt++;
      }
      if (adom == rootElement) return;
      //没有DETAILS的不做open
      if (adom && adom.tagName == "DETAILS") {
        adom.setAttribute("open", "open");
        adom.style = detailsStyle;
      }
    };

    const as = rootElement.querySelectorAll("li a");
    for (var i = 0; i < as.length; i++) {
      const adom = as[i];
      const domHref = getPath(adom.href);
      const localHref = getPath(location.href);
      if (!~adom.href.indexOf("#") && domHref === localHref) {
        adom.style = activeStyle;
        openTheParent(adom);
        scrollRootElement(rootElement, adom.offsetTop - offTop);
        break;
      }
    }

    //非A标签的选中MDN的接口属性（event）
    const emDom = rootElement.querySelector("li em");
    if (emDom) {
      emDom.style = activeStyle;
      scrollRootElement(rootElement, emDom.offsetTop - offTop);
    }
  };

  setTimeout(() => task());
  //切换语言不选中
  const pushState = window.history.pushState;
  window.history.pushState = (...args) => {
    pushState(args);
    task();
  };
};

(function () {
  "use strict";
  // mysql
  Load(
    () => location.host == "dev.mysql.com",
    () => MysqlDocSelct("font-size:16px;color:#f29221;")
  );

  
})();