mirror of
https://github.com/zhw2590582/ArtPlayer.git
synced 2026-10-21 12:41:20 -08:00
496 lines
16 KiB
JavaScript
496 lines
16 KiB
JavaScript
import { bilibiliDanmuParseFromUrl } from './bilibili';
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import getDanmuTop from './getDanmuTop';
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export default class Danmuku {
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constructor(art, option) {
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const { constructor, template } = art;
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this.utils = constructor.utils;
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this.validator = constructor.validator;
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this.$danmuku = template.$danmuku;
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this.$player = template.$player;
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this.art = art;
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this.queue = [];
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this.option = {};
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this.$refs = [];
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this.isStop = false;
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this.isHide = false;
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this.timer = null;
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this.config(option);
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if (this.option.useWorker) {
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try {
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this.worker = new Worker(new URL('data-url:./worker.js', import.meta.url));
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} catch (error) {
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//
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}
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}
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this.start = this.start.bind(this);
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this.stop = this.stop.bind(this);
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this.reset = this.reset.bind(this);
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this.destroy = this.destroy.bind(this);
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art.on('video:play', this.start);
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art.on('video:playing', this.start);
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art.on('video:pause', this.stop);
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art.on('video:waiting', this.stop);
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art.on('fullscreen', this.reset);
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art.on('fullscreenWeb', this.reset);
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art.on('destroy', this.destroy);
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this.load();
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}
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static get option() {
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return {
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danmuku: [],
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speed: 5,
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margin: ['2%', '25%'],
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opacity: 1,
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color: '#FFFFFF',
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mode: 0,
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fontSize: 25,
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filter: () => true,
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antiOverlap: true,
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useWorker: true,
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synchronousPlayback: false,
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};
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}
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static get scheme() {
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return {
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danmuku: 'array|function|string',
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speed: 'number',
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margin: 'array',
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opacity: 'number',
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color: 'string',
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mode: 'number',
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fontSize: 'number|string',
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filter: 'function',
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antiOverlap: 'boolean',
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useWorker: 'boolean',
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synchronousPlayback: 'boolean',
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};
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}
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get isRotate() {
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return this.art.plugins.autoOrientation && this.art.plugins.autoOrientation.state;
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}
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get marginTop() {
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const { clamp } = this.utils;
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const value = this.option.margin[0];
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const { clientHeight } = this.$player;
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if (typeof value === 'number') {
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return clamp(value, 0, clientHeight);
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}
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if (typeof value === 'string' && value.endsWith('%')) {
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const ratio = parseFloat(value) / 100;
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return clamp(clientHeight * ratio, 0, clientHeight);
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}
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return Danmuku.option.margin[0];
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}
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get marginBottom() {
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const { clamp } = this.utils;
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const value = this.option.margin[1];
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const { clientHeight } = this.$player;
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if (typeof value === 'number') {
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return clamp(value, 0, clientHeight);
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}
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if (typeof value === 'string' && value.endsWith('%')) {
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const ratio = parseFloat(value) / 100;
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return clamp(clientHeight * ratio, 0, clientHeight);
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}
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return Danmuku.option.margin[1];
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}
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filter(state, callback) {
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return this.queue.filter((danmu) => danmu.$state === state).map(callback);
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}
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getLeft($ref) {
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const rect = $ref.getBoundingClientRect();
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return this.isRotate ? rect.top : rect.left;
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}
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getRef() {
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const $refCache = this.$refs.pop();
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if ($refCache) return $refCache;
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const $ref = document.createElement('div');
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$ref.style.cssText = `
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user-select: none;
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position: absolute;
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white-space: pre;
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pointer-events: none;
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perspective: 500px;
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display: inline-block;
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will-change: transform;
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font-weight: normal;
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line-height: 1.125;
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visibility: hidden;
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font-family: SimHei, "Microsoft JhengHei", Arial, Helvetica, sans-serif;
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text-shadow: rgb(0, 0, 0) 1px 0px 1px, rgb(0, 0, 0) 0px 1px 1px, rgb(0, 0, 0) 0px -1px 1px, rgb(0, 0, 0) -1px 0px 1px;
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`;
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return $ref;
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}
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getReady() {
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const { currentTime } = this.art;
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return this.queue.filter((danmu) => {
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return (
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danmu.$state === 'ready' ||
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(danmu.$state === 'wait' && currentTime + 0.1 >= danmu.time && danmu.time >= currentTime - 0.1)
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);
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});
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}
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getEmits() {
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const result = [];
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const { clientWidth } = this.$player;
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const clientLeft = this.getLeft(this.$player);
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this.filter('emit', (danmu) => {
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const top = danmu.$ref.offsetTop;
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const left = this.getLeft(danmu.$ref) - clientLeft;
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const height = danmu.$ref.clientHeight;
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const width = danmu.$ref.clientWidth;
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const distance = left + width;
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const right = clientWidth - distance;
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const speed = distance / danmu.$restTime;
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const emit = {};
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emit.top = top;
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emit.left = left;
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emit.height = height;
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emit.width = width;
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emit.right = right;
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emit.speed = speed;
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emit.distance = distance;
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emit.time = danmu.$restTime;
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emit.mode = danmu.mode;
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result.push(emit);
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});
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return result;
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}
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getFontSize(fontSize) {
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const { clamp } = this.utils;
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const { clientHeight } = this.$player;
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if (typeof fontSize === 'number') {
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return clamp(fontSize, 12, clientHeight);
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}
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if (typeof fontSize === 'string' && fontSize.endsWith('%')) {
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const ratio = parseFloat(fontSize) / 100;
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return clamp(clientHeight * ratio, 12, clientHeight);
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}
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return Danmuku.option.fontSize;
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}
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postMessage(message = {}) {
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return new Promise((resolve) => {
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if (this.option.useWorker && this.worker && this.worker.postMessage) {
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message.id = Date.now();
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this.worker.postMessage(message);
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this.worker.onmessage = (event) => {
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const { data } = event;
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if (data.id === message.id) {
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resolve(data);
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}
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};
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} else {
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const top = getDanmuTop(message);
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resolve({ top });
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}
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});
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}
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async load() {
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try {
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let danmus = [];
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if (typeof this.option.danmuku === 'function') {
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danmus = await this.option.danmuku();
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} else if (typeof this.option.danmuku.then === 'function') {
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danmus = await this.option.danmuku;
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} else if (typeof this.option.danmuku === 'string') {
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danmus = await bilibiliDanmuParseFromUrl(this.option.danmuku);
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} else {
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danmus = this.option.danmuku;
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}
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this.utils.errorHandle(Array.isArray(danmus), 'Danmuku need return an array as result');
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this.art.emit('artplayerPluginDanmuku:loaded', danmus);
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this.queue = [];
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this.$danmuku.innerText = '';
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danmus.forEach((danmu) => this.emit(danmu));
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} catch (error) {
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this.art.emit('artplayerPluginDanmuku:error', error);
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throw error;
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}
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return this;
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}
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config(option) {
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const { clamp } = this.utils;
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this.option = Object.assign({}, Danmuku.option, this.option, option);
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this.validator(this.option, Danmuku.scheme);
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this.option.speed = clamp(this.option.speed, 1, 10);
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this.option.opacity = clamp(this.option.opacity, 0, 1);
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if (option.fontSize) {
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this.option.fontSize = this.getFontSize(this.option.fontSize);
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this.reset();
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}
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this.art.emit('artplayerPluginDanmuku:config', this.option);
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return this;
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}
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makeWait(danmu) {
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danmu.$state = 'wait';
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if (danmu.$ref) {
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danmu.$ref.style.visibility = 'hidden';
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danmu.$ref.style.marginLeft = '0px';
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danmu.$ref.style.transform = 'translateX(0px)';
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danmu.$ref.style.transition = 'transform 0s linear 0s';
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this.$refs.push(danmu.$ref);
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danmu.$ref = null;
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}
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}
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continue() {
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const { clientWidth } = this.$player;
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this.filter('stop', (danmu) => {
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danmu.$state = 'emit';
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danmu.$lastStartTime = Date.now();
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switch (danmu.mode) {
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case 0: {
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const translateX = clientWidth + danmu.$ref.clientWidth;
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danmu.$ref.style.transform = `translateX(${-translateX}px)`;
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danmu.$ref.style.transition = `transform ${danmu.$restTime}s linear 0s`;
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break;
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}
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default:
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break;
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}
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});
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return this;
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}
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suspend() {
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const { clientWidth } = this.$player;
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this.filter('emit', (danmu) => {
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danmu.$state = 'stop';
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switch (danmu.mode) {
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case 0: {
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const translateX = clientWidth - (this.getLeft(danmu.$ref) - this.getLeft(this.$player));
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danmu.$ref.style.transform = `translateX(${-translateX}px)`;
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danmu.$ref.style.transition = 'transform 0s linear 0s';
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break;
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}
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default:
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break;
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}
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});
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return this;
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}
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reset() {
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this.queue.forEach((danmu) => this.makeWait(danmu));
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return this;
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}
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update() {
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this.timer = window.requestAnimationFrame(async () => {
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if (this.art.playing && !this.isHide) {
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this.filter('emit', (danmu) => {
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const emitTime = (Date.now() - danmu.$lastStartTime) / 1000;
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danmu.$restTime -= emitTime;
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danmu.$lastStartTime = Date.now();
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if (danmu.$restTime <= 0) {
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this.makeWait(danmu);
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}
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});
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const readys = this.getReady();
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const { clientWidth, clientHeight } = this.$player;
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for (let index = 0; index < readys.length; index++) {
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const danmu = readys[index];
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danmu.$ref = this.getRef();
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danmu.$ref.innerText = danmu.text;
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this.$danmuku.appendChild(danmu.$ref);
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danmu.$ref.style.left = `${clientWidth}px`;
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danmu.$ref.style.opacity = this.option.opacity;
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danmu.$ref.style.fontSize = `${this.option.fontSize}px`;
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danmu.$ref.style.color = danmu.color;
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danmu.$ref.style.border = danmu.border ? `1px solid ${danmu.color}` : null;
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danmu.$ref.style.backgroundColor = danmu.border ? 'rgb(0 0 0 / 50%)' : null;
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danmu.$ref.style.marginLeft = '0px';
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danmu.$lastStartTime = Date.now();
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danmu.$restTime =
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this.option.synchronousPlayback && this.art.playbackRate
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? this.option.speed / Number(this.art.playbackRate)
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: this.option.speed;
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const target = {
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mode: danmu.mode,
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height: danmu.$ref.clientHeight,
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speed: (clientWidth + danmu.$ref.clientWidth) / danmu.$restTime,
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};
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const { top } = await this.postMessage({
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target,
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emits: this.getEmits(),
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antiOverlap: this.option.antiOverlap,
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clientWidth: clientWidth,
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clientHeight: clientHeight,
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marginBottom: this.marginBottom,
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marginTop: this.marginTop,
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});
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if (danmu.$ref) {
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if (!this.isStop && top !== undefined) {
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danmu.$state = 'emit';
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danmu.$ref.style.visibility = 'visible';
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switch (danmu.mode) {
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case 0: {
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danmu.$ref.style.top = `${top}px`;
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const translateX = clientWidth + danmu.$ref.clientWidth;
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danmu.$ref.style.transform = `translateX(${-translateX}px)`;
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danmu.$ref.style.transition = `transform ${danmu.$restTime}s linear 0s`;
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break;
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}
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case 1:
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danmu.$ref.style.left = '50%';
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danmu.$ref.style.top = `${top}px`;
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danmu.$ref.style.marginLeft = `-${danmu.$ref.clientWidth / 2}px`;
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break;
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default:
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break;
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}
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} else {
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danmu.$state = 'ready';
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this.$refs.push(danmu.$ref);
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danmu.$ref = null;
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}
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}
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}
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}
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if (!this.isStop) {
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this.update();
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}
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});
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return this;
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}
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stop() {
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this.isStop = true;
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this.suspend();
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window.cancelAnimationFrame(this.timer);
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this.art.emit('artplayerPluginDanmuku:stop');
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return this;
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}
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start() {
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this.isStop = false;
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this.continue();
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this.update();
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this.art.emit('artplayerPluginDanmuku:start');
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return this;
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}
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show() {
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this.isHide = false;
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this.start();
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this.$danmuku.style.display = 'block';
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this.art.emit('artplayerPluginDanmuku:show');
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return this;
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}
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hide() {
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this.isHide = true;
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this.stop();
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this.queue.forEach((item) => this.makeWait(item));
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this.$danmuku.style.display = 'none';
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this.art.emit('artplayerPluginDanmuku:hide');
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return this;
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}
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emit(danmu) {
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this.validator(danmu, {
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text: 'string',
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mode: 'number|undefined',
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color: 'string|undefined',
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time: 'number|undefined',
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border: 'boolean|undefined',
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});
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if (!danmu.text.trim()) return this;
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if (!this.option.filter(danmu)) return this;
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if (danmu.time) {
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danmu.time = this.utils.clamp(danmu.time, 0, Infinity);
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} else {
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danmu.time = this.art.currentTime + 0.5;
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}
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if (danmu.mode === undefined) {
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danmu.mode = this.option.mode;
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}
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if (danmu.color === undefined) {
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danmu.color = this.option.color;
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}
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this.queue.push({
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...danmu,
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$state: 'wait',
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$ref: null,
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$restTime: 0,
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$lastStartTime: 0,
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});
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return this;
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}
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destroy() {
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this.stop();
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if (this.worker && this.worker.terminate) this.worker.terminate();
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this.art.off('video:play', this.start);
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this.art.off('video:playing', this.start);
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this.art.off('video:pause', this.stop);
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this.art.off('video:waiting', this.stop);
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this.art.off('fullscreen', this.reset);
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this.art.off('fullscreenWeb', this.reset);
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this.art.off('destroy', this.destroy);
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this.art.emit('artplayerPluginDanmuku:destroy');
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}
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}
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