read-scribd.user.js

// ==UserScript==
// @name         Read Scribd Aloud
// @namespace    http://tampermonkey.net/
// @version      0.3
// @description  When reading a Scribd book, press 'l' to start reading and 'x' to stop.
// @author       Caleb Figgers
// @match        https://www.scribd.com/read/*
// @icon         https://s-f.scribdassets.com/favicon.ico?02e8b6ef6?v=4
// @grant        none
// ==/UserScript==

async function readpage(dom) {
    // To make the narrator read faster/slower:
    // Update this   ↓ (number between 1-10) and then save (File -> Save or Ctrl + S) and refresh open Scribd tabs.
    let speakSpeed = 6; //
    // To change the narrator voice:
    // Update this   ↓ and then save (File -> Save or Ctrl + S) and refresh open Scribd tabs. May be different voices on different computers.
    let voiceIndex = 0;
    let lang = "en-US";

    let myNodelist = dom.querySelectorAll(".text_line");
    let text = [];
    let curNode = null;
    let curNodeTexts = [];

    for (let i = 0; i < myNodelist.length; i++) {
        if (myNodelist[i].childNodes.length == 2) {
            text.push(myNodelist[i].childNodes[0].data);
        } else {
            curNode = myNodelist[i].childNodes;
            curNodeTexts = [];
            for (let j = 0; j < curNode.length; j++) {
                curNodeTexts.push(curNode[j].innerText);
            }
            text.push(curNodeTexts.join(''));
            // text.push("hello");
        };
    };

    let utterance = new SpeechSynthesisUtterance(text.join(" "));
    utterance.rate = speakSpeed;
    utterance.voice = await chooseVoice(lang, voiceIndex);
    speechSynthesis.speak(utterance);

}


const chooseVoice = async (lang, voiceIndex) => {
    const voices = (await getVoices()).filter(voice => voice.lang == lang)

    return new Promise(resolve => {
        resolve(voices[voiceIndex])
    })
}

const getVoices = () => {
    return new Promise(resolve => {
        let voices = speechSynthesis.getVoices()
        if (voices.length) {
            resolve(voices)
            return
        }
        speechSynthesis.onvoiceschanged = () => {
            voices = speechSynthesis.getVoices()
            resolve(voices)
        }
    })
}


function doc_keyUp(e) {
    switch (e.keyCode) {
        case 76:
            // l
            readpage(document);
            break;
        case 88:
            // x
            speechSynthesis.cancel();
            break;
        default:
            break;
    }
}

document.addEventListener('keyup', doc_keyUp, false);