// ==UserScript==
// @name        微信读书自动翻页
// @namespace   https://github.com/AliubYiero/TemperScripts
// @version     1.0.0
// @description 滚动触碰两次页面底部自动翻下一页，滚动触碰两次页面顶部自动翻上一页
// @author      Yiero
// @match		https://weread.qq.com/web/reader/*
// @icon        https://weread.qq.com/favicon.ico
// @license     GPL
// @grant       GM_addStyle
// @downloadURL https://update.greasyfork.icu/scripts/468003/%E5%BE%AE%E4%BF%A1%E8%AF%BB%E4%B9%A6%E8%87%AA%E5%8A%A8%E7%BF%BB%E9%A1%B5.user.js
// @updateURL https://update.greasyfork.icu/scripts/468003/%E5%BE%AE%E4%BF%A1%E8%AF%BB%E4%B9%A6%E8%87%AA%E5%8A%A8%E7%BF%BB%E9%A1%B5.meta.js
// ==/UserScript==

"use strict";
window.onload = () => {
    switchToNextPage();
    (new MutationObserver(e => {
        console.log('scroll');
        setTimeout(() => {
            scrollTo(0, 90);
        }, 100);
    }))
        .observe(document.getElementsByClassName('app_content')[0], {
        childList: true
    });
};
function fireKeyEvent(el, evtType, keyCode) {
    let evtObj;
    if (document.createEvent) {
        if (window.KeyEvent) {
            evtObj = document.createEvent("KeyEvents");
            evtObj.initKeyEvent(evtType, true, true);
            el.dispatchEvent(evtObj);
            return;
        }
        evtObj = document.createEvent("UIEvents");
        evtObj.initUIEvent(evtType, true, true);
        delete evtObj.keyCode;
        if (typeof evtObj.keyCode === "undefined") {
            Object.defineProperty(evtObj, "keyCode", { value: keyCode });
        }
        else {
            evtObj.key = String.fromCharCode(keyCode);
        }
        if (typeof evtObj.ctrlKey === "undefined") {
            Object.defineProperty(evtObj, "ctrlKey", { value: true });
        }
        else {
            evtObj.ctrlKey = true;
        }
        el.dispatchEvent(evtObj);
        return;
    }
}
const checkPageBottom = (function () {
    let isTop = false;
    let isBottom = false;
    let resetPageStatus = () => {
        isTop = false;
        isBottom = false;
    };
    return function () {
        const { scrollTop, clientHeight, scrollHeight } = document.documentElement;
        if (scrollTop === 0) {
            if (isTop) {
                resetPageStatus();
                return 37;
            }
            isTop = true;
            scrollBy(0, 1);
        }
        else if (scrollTop + clientHeight >= scrollHeight) {
            if (isBottom) {
                resetPageStatus();
                return 39;
            }
            isBottom = true;
            scrollBy(0, -1);
        }
    };
})();
const debounce = function (fn, delay) {
    let timer;
    return function () {
        clearTimeout(timer);
        timer = setTimeout(fn, delay * 1000);
    };
};
function switchToNextPage() {
    window.addEventListener('scroll', debounce(() => {
        const keyEventCode = checkPageBottom();
        if (keyEventCode) {
            fireKeyEvent(document, "keydown", keyEventCode);
        }
    }, 0.1));
}