在直播串流時將聊天室的訊息轉換成彈幕發送
// ==UserScript==
// @name YT 彈幕
// @namespace http://tampermonkey.net/
// @version 0.0.7
// @description 在直播串流時將聊天室的訊息轉換成彈幕發送
// @author JayHuang
// @match https://www.youtube.com/*
// @icon https://www.youtube.com/s/desktop/b5305900/img/favicon.ico
// @grant GM_addStyle
// @license MIT
// ==/UserScript==
const showUser = false; // 是否顯示使用者
const fontFamily = "Arial"; // 字型
const speed = 2; // 每幀移動 px 量
const bufferDistance = 20; // 開始位置增量(px)，防止突兀的出現
const size = 36; // 字體大小
const weight = 800; // 字體粗細 (normal | bold | bolder | lighter | 100 | 200 | 300 | 400 | 500 | 600 | 700 | 800 | 900)
const alive = 5; // 存活秒數(若 `fixed` 為 `true` 時才會生效)
const at = "full"; // 上下半部( "top" | "bottom" | "full" )
const from = "right"; // 從左到右 或 從右到左 ( "right" | "left" )
// ----------以上可調整--------------
const defaultConfig = {
showUser,
color: "white", // 字體顏色
fontFamily,
size,
fontSizeRadio: false, // 字體大小是否跟隨影片比例調整
weight,
at,
from,
speed,
bufferDistance,
fixed: false, // 是否固度位置
alive, // 若 `fixed` 為 `true` 時才會生效
};
var SceneInitState;
(function (SceneInitState) {
SceneInitState[SceneInitState["\u670D\u52D9\u5DF2\u7D50\u675F"] = 0] = "\u670D\u52D9\u5DF2\u7D50\u675F";
SceneInitState[SceneInitState["\u670D\u52D9\u521D\u59CB\u5316"] = 1] = "\u670D\u52D9\u521D\u59CB\u5316";
SceneInitState[SceneInitState["\u670D\u52D9\u5DF2\u555F\u52D5"] = 2] = "\u670D\u52D9\u5DF2\u555F\u52D5";
})(SceneInitState || (SceneInitState = {}));
const danmuState = "danmuState";
const danmuManualCtrl = "danmuCtrl";
function theLog(...message) {
console.log("[danmu]::", ...message);
}
function sleep(millisecond = 400) {
return new Promise((resolve) => {
setTimeout(resolve, millisecond);
});
}
function debounceWrapper(func, wait = 1000) {
let timeout = null;
return function (...args) {
if (timeout) {
theLog("Too Fast!!");
clearTimeout(timeout);
}
timeout = setTimeout(() => {
func(...args);
}, wait);
};
}
async function getElement(selectors, option = {}) {
var _a, _b;
let element = null;
const signal = (_a = option.signal) !== null && _a !== void 0 ? _a : { aborted: false };
let limitRetry = (_b = option.limitRetry) !== null && _b !== void 0 ? _b : 400;
const delaytime = option.delaytime;
while (element === null && limitRetry >= 0) {
if (signal.aborted) {
throw new Error(`Search aborted for selector: ${selectors} and Reason: ${signal.reason}`);
}
element = document.querySelector(selectors);
limitRetry -= 1;
await sleep(delaytime);
}
if (element) {
return element;
}
else {
throw new Error("Not Found Element: " + selectors);
}
}
class DanMuManager {
get ratio() {
return window.devicePixelRatio;
}
get isFreeze() {
return document.visibilityState === "hidden";
}
get isActive() {
return !this.isFreeze;
}
constructor(elementRef) {
this.elementRef = elementRef;
theLog("DanMuManager Constructor");
this.canvas = document.createElement("canvas");
const ctx = this.canvas.getContext("2d");
if (ctx === null) {
throw new Error("Not Support Canvas Context");
}
else {
this.ctx = ctx;
this.danmuSet = new Set();
this.__injectCanvas();
this.loop = this.loop.bind(this);
this.loodID = requestAnimationFrame(this.loop);
}
}
loop() {
this.__setCanvas();
const width = this.canvas.width;
const height = this.canvas.height;
this.ctx.clearRect(0, 0, width, height);
const willDelete = [];
this.danmuSet.forEach((danmu) => {
const obj = danmu.update();
if (obj) {
const { size, color, weight, message, x, y } = obj;
this.ctx.font = `${weight} ${size}px Arial`;
this.ctx.fillStyle = color;
this.ctx.strokeStyle = "black";
this.ctx.lineWidth = 1;
this.ctx.fillText(message, x, y);
this.ctx.strokeText(message, x, y);
}
else {
willDelete.push(danmu);
}
});
willDelete.forEach((danmu) => {
this.danmuSet.delete(danmu);
});
this.loodID = requestAnimationFrame(this.loop);
}
addDanmu(message, user, option) {
if (this.isActive) {
const width = this.canvas.width;
const height = this.canvas.height;
const danmu = new DanMu(message, user, { width, height }, this, option);
this.danmuSet.add(danmu);
}
}
onDestroy() {
this.canvas.remove();
this.danmuSet.clear();
cancelAnimationFrame(this.loodID);
theLog("DanMuManager onDestroy");
}
__injectCanvas() {
var _a;
(_a = this.elementRef.parentElement) === null || _a === void 0 ? void 0 : _a.append(this.canvas);
}
__setCanvas() {
this.canvas.style.position = "absolute";
this.canvas.style.width = this.elementRef.style.width;
this.canvas.style.height = this.elementRef.style.height;
this.canvas.style.top = this.elementRef.style.top;
this.canvas.style.left = this.elementRef.style.left;
this.canvas.width = this.elementRef.clientWidth * this.ratio;
this.canvas.height = this.elementRef.clientHeight * this.ratio;
}
}
class DanMu {
get width() {
return this.elementRef.width;
}
get height() {
return this.elementRef.height;
}
constructor(message, user, elementRef, manager, config) {
this.message = message;
this.user = user;
this.elementRef = elementRef;
this.manager = manager;
const { showUser, color, size, weight, fixed, at, from, bufferDistance, speed, alive, fontFamily, fontSizeRadio, } = Object.assign(Object.assign({}, defaultConfig), config);
this.config = {
showUser,
color,
size,
weight,
fontFamily,
fixed,
at,
from,
speed: fixed ? 0 : from === "left" ? speed : speed * -1,
alive: alive * 1000,
bufferDistance,
fontSizeRadio,
};
this.textWidth = this.__computerWidth();
const ref_x = (this.textWidth + bufferDistance) * 1.5;
this.rangeX = [ref_x * -1, this.width + ref_x];
this.locate = this.__getInitLoate();
this.currXaxis = this.locate.x;
this.isEnd = false;
this.time = Date.now();
}
update() {
if (this.isEnd) {
return null;
}
else {
const { size, weight, color, showUser, speed, alive, fixed } = this.config;
const message = showUser
? `${this.user} 說: ${this.message}`
: this.message;
this.currXaxis += speed;
if (fixed) {
const timeGap = Date.now() - this.time;
if (timeGap >= alive) {
this.isEnd = true;
}
}
else if (this.currXaxis < this.rangeX[0] ||
this.currXaxis > this.rangeX[1]) {
this.isEnd = true;
}
return {
size,
weight,
color,
message,
x: this.currXaxis,
y: this.locate.y,
};
}
}
__computerWidth() {
const { weight, size } = this.config;
this.manager.ctx.font = `${weight} ${size}px Arial`;
const textMetrics = this.manager.ctx.measureText(this.message);
return textMetrics.width;
}
__getInitLoate() {
const x = this.__getXaxis();
const y = this.__getYaxis();
return { x, y };
}
__getXaxis() {
const { fixed, from } = this.config;
if (fixed) {
return (this.width - this.textWidth) / 2;
}
else if (from === "left") {
return this.rangeX[0];
}
else {
return this.rangeX[1];
}
}
__getYaxis() {
const { at } = this.config;
const padding = 20;
const rangeY = [padding, this.height - padding];
if (at === "bottom") {
rangeY[0] = this.height / 2;
}
else if (at === "top") {
rangeY[1] = this.height / 2;
}
return Math.floor(Math.random() * (rangeY[1] - rangeY[0] + 1)) + rangeY[0];
}
}
class ChatObserver {
get ChatListElement() {
var _a, _b;
return (_b = (_a = this.iframeBody) === null || _a === void 0 ? void 0 : _a.querySelector("#items")) !== null && _b !== void 0 ? _b : null;
}
constructor(containerEl, manager) {
var _a;
this.manager = manager;
theLog("ChatObserver Constructor");
if (containerEl instanceof HTMLIFrameElement) {
this.containerEl = containerEl;
this.iframeBody = (_a = containerEl.contentDocument) === null || _a === void 0 ? void 0 : _a.body;
this.__addObs();
if (!this.iframeBody) {
containerEl.onload = () => {
var _a;
this.iframeBody = (_a = containerEl.contentDocument) === null || _a === void 0 ? void 0 : _a.body;
this.__addObs();
};
}
}
else {
throw new Error("ChatObserver Error");
}
}
__addObs() {
if (this.iframeBody && this.iframeBody.children.length > 0) {
const targetEl = this.ChatListElement;
if (targetEl && this.stateObs === undefined) {
theLog("add observer");
const stateObs = new MutationObserver((entire) => {
entire.forEach((record) => {
record.addedNodes.forEach((node) => {
this.decodeElement(node)
.then(() => { })
.catch(() => { });
});
});
});
stateObs.observe(targetEl, { childList: true });
}
}
}
async decodeElement(el) {
return new Promise((resolve, reject) => {
var _a, _b;
const authorEl = el.querySelector("#author-name");
const isMember = Array.from((_a = authorEl === null || authorEl === void 0 ? void 0 : authorEl.classList) !== null && _a !== void 0 ? _a : []).includes("member");
const userName = authorEl === null || authorEl === void 0 ? void 0 : authorEl.textContent;
const message = (_b = el.querySelector("#message")) === null || _b === void 0 ? void 0 : _b.textContent;
if (userName && message) {
this.manager.addDanmu(message, userName, isMember ? { color: "red", size: 36, fixed: true } : {});
resolve();
}
else {
reject();
}
});
}
__removeObs() {
var _a;
(_a = this.stateObs) === null || _a === void 0 ? void 0 : _a.disconnect();
this.stateObs = undefined;
theLog("remove observer");
}
onDestroy() {
this.__removeObs();
theLog("ChatObserver onDestroy");
}
}
class InsertKit {
constructor() {
this.rootElement = document.createElement("div");
this.switchElement = document.createElement("label");
this.fontSizeElement = document.createElement("div");
this.__setRootElement();
this.__setSwitchElement();
this.rootElement.append(this.switchElement, this.fontSizeElement);
}
onInsert() {
theLog("onInsert");
getElement("#below.style-scope.ytd-watch-flexy")
.then((ref) => {
if (ref.parentElement) {
ref.parentElement.insertBefore(this.rootElement, ref);
}
})
.catch((e) => {
theLog("找不到主畫面");
});
}
onDesroy() {
this.rootElement.remove();
}
__setRootElement() {
this.rootElement.style.display = "flex";
this.rootElement.style.flexDirection = "row";
this.rootElement.style.alignItems = "center";
this.rootElement.style.justifyContent = "center";
this.rootElement.style.padding = "4px 16px";
this.rootElement.style.margin = "8px";
this.rootElement.style.borderRadius = "8px";
this.rootElement.style.backgroundColor = "rgba(30,30,30, 0.5)";
this.rootElement.style.width = "max-content";
}
__setSwitchElement() {
this.switchElement.id = "tp-switch-btn";
this.switchElement.style.color = "var(--yt-live-chat-primary-text-color)";
const inputEl = document.createElement("input");
inputEl.type = "checkbox";
inputEl.name = "toggle";
inputEl.hidden = true;
inputEl.disabled = true;
inputEl.classList.add("Toggle__input");
const spanEl = document.createElement("span");
spanEl.style.marginLeft = "8px";
spanEl.classList.add("Toggle__display");
spanEl.innerHTML = `<svg width="18" height="14" viewBox="0 0 18 14" fill="none" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" class="Toggle__icon Toggle__icon--checkmark">
<path d="M6.08471 10.6237L2.29164 6.83059L1 8.11313L6.08471 13.1978L17 2.28255L15.7175 1L6.08471 10.6237Z" fill="currentcolor" stroke="currentcolor"></path>
</svg>
<svg width="13" height="13" viewBox="0 0 13 13" fill="none" xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" class="Toggle__icon Toggle__icon--cross">
<path d="M11.167 0L6.5 4.667L1.833 0L0 1.833L4.667 6.5L0 11.167L1.833 13L6.5 8.333L11.167 13L13 11.167L8.333 6.5L13 1.833L11.167 0Z" fill="currentcolor"></path>
</svg>`;
inputEl.onclick = () => {
document.dispatchEvent(new CustomEvent(danmuManualCtrl, {
detail: !inputEl.checked,
}));
};
document.addEventListener(danmuState, (event) => {
const { detail } = event;
switch (detail) {
case SceneInitState.服務初始化:
inputEl.disabled = true;
break;
case SceneInitState.服務已啟動:
inputEl.disabled = false;
inputEl.checked = true;
break;
case SceneInitState.服務已結束:
inputEl.disabled = false;
inputEl.checked = false;
break;
default:
break;
}
});
this.switchElement.append("彈幕開關", inputEl, spanEl);
}
}
class Scene {
get state() {
return this.__state;
}
set state(v) {
if (this.__state !== v) {
this.__state = v;
document.dispatchEvent(new CustomEvent(danmuState, {
detail: v,
}));
}
}
constructor() {
theLog("Scene Constructor");
this.prevUrl = "";
this.destroy = () => { };
this.__state = SceneInitState.服務已結束;
document.addEventListener(danmuManualCtrl, (event) => {
const { detail } = event;
if (detail) {
this.onManualClose();
}
else {
this.onManualOpen();
}
});
}
changeScene(url) {
var _a;
theLog("changeScene");
if (this.prevUrl !== url) {
this.prevUrl = url;
const isVideo = Scene.videoRegExp.test(url);
if (isVideo) {
switch (this.state) {
case SceneInitState.服務已結束: {
theLog("啟動服務");
this.__onInit();
break;
}
case SceneInitState.服務初始化:
theLog("啟動中.....");
break;
case SceneInitState.服務已啟動:
theLog("關閉服務並重新啟動");
this.__onDesroy().then(() => {
this.__onInit();
});
break;
}
}
else {
(_a = this.controller) === null || _a === void 0 ? void 0 : _a.abort();
this.__onDesroy();
}
}
}
onManualOpen() {
theLog("手動開啟服務");
this.__onDesroy().then(() => {
this.__onInit();
});
}
onManualClose() {
theLog("手動關閉服務");
this.__onDesroy();
}
async __onInit() {
try {
this.state = SceneInitState.服務初始化;
this.controller = new AbortController();
const signal = this.controller.signal;
const [video, container] = await Promise.all([
getElement(".video-stream.html5-main-video", { signal }),
getElement("#chat-container #chatframe", { signal }),
]);
theLog({ video, container });
const manager = new DanMuManager(video);
const obs = new ChatObserver(container, manager);
this.controller = undefined;
this.state = SceneInitState.服務已啟動;
this.destroy = () => {
manager.onDestroy();
obs.onDestroy();
};
}
catch (e) {
theLog("Error occur", e);
this.state = SceneInitState.服務已結束;
this.destroy = () => { };
}
}
async __onDesroy() {
return new Promise((resolve) => {
this.destroy();
this.state = SceneInitState.服務已結束;
setTimeout(resolve, 200);
});
}
}
Scene.videoRegExp = new RegExp(/^https:\/\/www.youtube.com\/watch\?v=(\S+)/);
(function () {
"use strict";
theLog("Loaded Script");
// @ts-ignore
GM_addStyle(`.Toggle__display {
--offset: 0.25em;
--diameter: 1.8em;
display: inline-flex;
align-items: center;
justify-content: space-around;
width: calc(var(--diameter) * 2 + var(--offset) * 2);
height: calc(var(--diameter) + var(--offset) * 2);
position: relative;
border-radius: 100vw;
background-color: #fbe4e2;
transition: 250ms;
margin-right: 1ch;
}
.Toggle__display::before {
content: '';
z-index: 2;
position: absolute;
top: 50%;
left: var(--offset);
width: var(--diameter);
height: var(--diameter);
border-radius: 50%;
background-color: white;
transform: translate(0, -50%);
will-change: transform;
transition: inherit;
}
.Toggle__input:focus + .Toggle__display {
outline: 1px dotted #212121;
outline: 1px auto -webkit-focus-ring-color;
outline-offset: 2px;
}
.Toggle__input:focus:not(:focus-visible) + .Toggle__display {
outline: 0;
}
.Toggle__input:checked + .Toggle__display {
background-color: #e3f5eb;
}
.Toggle__input:checked + .Toggle__display::before {
transform: translate(100%, -50%);
}
.Toggle__input:disabled + .Toggle__display {
opacity: 0.6;
filter: grayscale(40%);
cursor: not-allowed;
}
.Toggle__icon {
display: inline-block;
width: 1em;
height: 1em;
color: inherit;
fill: currentcolor;
vertical-align: middle;
overflow: hidden;
}
.Toggle__icon--cross {
color: #e74c3c;
font-size: 85%;
}
.Toggle__icon--checkmark {
color: #1fb978;
}`);
const scene = new Scene();
const kit = new InsertKit();
const changeScene = debounceWrapper(scene.changeScene.bind(scene));
const insertElement = debounceWrapper(kit.onInsert.bind(kit));
const observer = new MutationObserver(() => {
changeScene(window.location.href);
insertElement();
});
const titleElement = document.querySelector("title");
if (titleElement) {
observer.observe(titleElement, { childList: true });
}
})();
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