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微信读书自动滚动翻页

为微信阅读pc版添加自动滚动和翻页功能

当前为 2022-10-24 提交的版本，查看 最新版本。

// ==UserScript==
// @name         微信读书自动滚动翻页
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  为微信阅读pc版添加自动滚动和翻页功能
// @author       DearCyan
// @match        https://weread.qq.com/web/reader/*
// @icon         https://weread-1258476243.file.myqcloud.com/web/wrwebnjlogic/image/reader_top_home.37ef15b1.png
// @grant        none
// @license MIT  GPL
// ==/UserScript==

function fireKeyEvent(el, evtType, keyCode) {
    let evtObj;
    if (document.createEvent) {
        if (window.KeyEvent) {//firefox 浏览器下模拟事件
            evtObj = document.createEvent('KeyEvents');
            evtObj.initKeyEvent(evtType, true, true, window, true, false, false, false, keyCode, 0);
        }
        else {//chrome 浏览器下模拟事件
            evtObj = document.createEvent('UIEvents');
            evtObj.initUIEvent(evtType, true, true, window, 1);

            delete evtObj.keyCode;
            if (typeof evtObj.keyCode === "undefined") {//为了模拟keycode
                Object.defineProperty(evtObj, "keyCode", { value: keyCode });
            }
            else {
                evtObj.key = String.fromCharCode(keyCode);
            }

            if (typeof evtObj.ctrlKey === 'undefined') {//为了模拟ctrl键
                Object.defineProperty(evtObj, "ctrlKey", { value: true });
            }
            else {
                evtObj.ctrlKey = true;
            }
        }
        el.dispatchEvent(evtObj);

    }
    else if (document.createEventObject) {//IE 浏览器下模拟事件
        evtObj = document.createEventObject();
        evtObj.keyCode = keyCode
        el.fireEvent('on' + evtType, evtObj);
    }
}

window.onload = function () {
    let dick
    let speed = 10

    document.addEventListener('keyup', (e) => {
        console.debug('keyup', e.key);
        if (e.key == '-') {
            if (speed = 20) {
                speed++
            }
            autoScroll(speed)
        }
        if (e.key == '+') {
            if (speed > 1) {
                speed--
            }
            autoScroll(speed)
        }
        if (e.key == 'Enter') {
            autoScroll(0)
            speed = 10
        }
    })


    function debounce(fn) {
        let timeout = null;
        return function () {
            clearTimeout(timeout);
            timeout = setTimeout(() => {
                fn.apply(this, arguments);
            }, 5000);
        };
    }

    function getHeight() {
        let scrollHeight = document.body.scrollHeight - document.body.offsetHeight - 1
        return window.scrollY >= scrollHeight
    }

    function nextPage() {
        if (getHeight()) {
            console.debug('next page');
            fireKeyEvent(document, "keydown", 39)
            debounce(autoScroll)(speed)
        }
    }
    function autoScroll(val) {

        if (val !== 0) {
            clearInterval(dick)
            dick = setInterval(
                () => {

                    window.scroll(0, window.scrollY + 1);
                    if (getHeight()) {
                        console.debug('waiting for nextpage');
                        debounce(nextPage)()
                        clearInterval(dick)
                    }
                    console.debug('restart');
                }, val
            )
        } else {
            clearInterval(dick)
            console.debug('stop');
        }
    }

}