mirror of
https://github.com/Megghy/vtsuru.live.git
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630 lines
22 KiB
Vue
630 lines
22 KiB
Vue
<template>
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<yt-live-chat-renderer class="style-scope yt-live-chat-app" style="--scrollbar-width:11px;" hide-timestamps
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@mousemove="refreshCantScrollStartTime">
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<ticker class="style-scope yt-live-chat-renderer" :messages.sync="paidMessages" :showGiftName="showGiftName || undefined">
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</ticker>
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<yt-live-chat-item-list-renderer class="style-scope yt-live-chat-renderer" allow-scroll>
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<div ref="scroller" id="item-scroller" class="style-scope yt-live-chat-item-list-renderer animated"
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@scroll="onScroll">
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<div ref="itemOffset" id="item-offset" class="style-scope yt-live-chat-item-list-renderer">
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<div ref="items" id="items" class="style-scope yt-live-chat-item-list-renderer" style="overflow: hidden"
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:style="{ transform: `translateY(${Math.floor(scrollPixelsRemaining)}px)` }">
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<template v-for="message in messages" :key="message.id">
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<text-message v-if="message.type === MESSAGE_TYPE_TEXT"
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class="style-scope yt-live-chat-item-list-renderer" :time="message.time" :avatarUrl="message.avatarUrl"
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:authorName="message.authorName" :authorType="message.authorType" :privilegeType="message.privilegeType"
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:richContent="getShowRichContent(message)" :repeated="message.repeated"></text-message>
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<paid-message v-else-if="message.type === MESSAGE_TYPE_GIFT"
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class="style-scope yt-live-chat-item-list-renderer" :time="message.time" :avatarUrl="message.avatarUrl"
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:authorName="getShowAuthorName(message)" :price="message.price"
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:priceText="message.price <= 0 ? getGiftShowNameAndNum(message) : ''"
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:content="message.price <= 0 ? '' : getGiftShowContent(message, showGiftName)"></paid-message>
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<membership-item v-else-if="message.type === MESSAGE_TYPE_MEMBER"
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class="style-scope yt-live-chat-item-list-renderer" :time="message.time" :avatarUrl="message.avatarUrl"
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:authorName="getShowAuthorName(message)" :privilegeType="message.privilegeType"
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:title="message.title"></membership-item>
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<paid-message v-else-if="message.type === MESSAGE_TYPE_SUPER_CHAT"
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class="style-scope yt-live-chat-item-list-renderer" :time="message.time" :avatarUrl="message.avatarUrl"
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:authorName="getShowAuthorName(message)" :price="message.price"
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:content="getShowContent(message)"></paid-message>
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</template>
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</div>
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</div>
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</div>
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</yt-live-chat-item-list-renderer>
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</yt-live-chat-renderer>
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</template>
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<script>
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import _ from 'lodash'
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import Ticker from './Ticker.vue'
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import TextMessage from './TextMessage.vue'
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import MembershipItem from './MembershipItem.vue'
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import PaidMessage from './PaidMessage.vue'
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import * as constants from './constants'
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import { defineComponent } from 'vue'
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import { useDebounceFn } from '@vueuse/core'
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// 要添加的消息类型
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const ADD_MESSAGE_TYPES = [
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constants.MESSAGE_TYPE_TEXT,
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constants.MESSAGE_TYPE_GIFT,
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constants.MESSAGE_TYPE_MEMBER,
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constants.MESSAGE_TYPE_SUPER_CHAT,
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]
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// 发送消息时间间隔范围
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const MESSAGE_MIN_INTERVAL = 80
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const MESSAGE_MAX_INTERVAL = 1000
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// 每次发送消息后增加的动画时间，要比MESSAGE_MIN_INTERVAL稍微大一点，太小了动画不连续，太大了发送消息时会中断动画
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// 84 = ceil((1000 / 60) * 5)
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const CHAT_SMOOTH_ANIMATION_TIME_MS = 84
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// 滚动条距离底部小于多少像素则认为在底部
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const SCROLLED_TO_BOTTOM_EPSILON = 15
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export default defineComponent({
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name: 'ChatRenderer',
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components: {
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Ticker,
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TextMessage,
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MembershipItem,
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PaidMessage
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},
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props: {
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maxNumber: {
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type: Number,
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default: 60
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},
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showGiftName: {
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type: Boolean,
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default: false
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},
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customCss: {
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type: String,
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default: ''
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},
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},
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data() {
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let customStyleElement = document.createElement('style')
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document.head.appendChild(customStyleElement)
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const setCssDebounce = useDebounceFn(() => {
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customStyleElement.innerHTML = this.customCss ?? ''
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console.log('[blivechat] 已设置自定义样式')
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}, 1000)
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return {
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MESSAGE_TYPE_TEXT: constants.MESSAGE_TYPE_TEXT,
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MESSAGE_TYPE_GIFT: constants.MESSAGE_TYPE_GIFT,
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MESSAGE_TYPE_MEMBER: constants.MESSAGE_TYPE_MEMBER,
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MESSAGE_TYPE_SUPER_CHAT: constants.MESSAGE_TYPE_SUPER_CHAT,
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messages: [], // 显示的消息
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paidMessages: [], // 固定在上方的消息
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smoothedMessageQueue: [], // 平滑消息队列，由外部调用addMessages等方法添加
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emitSmoothedMessageTimerId: null, // 消费平滑消息队列的定时器ID
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enqueueIntervals: [], // 最近进队列的时间间隔，用来估计下次进队列的时间
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lastEnqueueTime: null, // 上次进队列的时间
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estimatedEnqueueInterval: null, // 估计的下次进队列时间间隔
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messagesBuffer: [], // 暂时未显示的消息，当不能自动滚动时会积压在这
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preinsertHeight: 0, // 插入新消息之前items的高度
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isSmoothed: true, // 是否平滑滚动，当消息太快时不平滑滚动
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chatRateMs: 1000, // 用来计算消息速度
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scrollPixelsRemaining: 0, // 平滑滚动剩余像素
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scrollTimeRemainingMs: 0, // 平滑滚动剩余时间
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lastSmoothChatMessageAddMs: null, // 上次showNewMessages时间
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smoothScrollRafHandle: null, // 平滑滚动requestAnimationFrame句柄
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lastSmoothScrollUpdate: null, // 平滑滚动上一帧时间
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atBottom: true, // 滚动到底部，用来判断能否自动滚动
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cantScrollStartTime: null, // 开始不能自动滚动的时间，用来防止卡住
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customStyleElement,
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setCssDebounce,
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}
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},
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computed: {
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canScrollToBottom() {
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return this.atBottom/* || this.allowScroll */
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}
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},
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watch: {
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canScrollToBottom(val) {
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this.cantScrollStartTime = val ? null : new Date()
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},
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watchCustomCss: {
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immediate: true,
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handler(val, oldVal) {
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this.setCssDebounce(val)
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}
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}
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},
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mounted() {
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this.scrollToBottom()
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},
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beforeDestroy() {
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if (this.emitSmoothedMessageTimerId) {
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window.clearTimeout(this.emitSmoothedMessageTimerId)
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this.emitSmoothedMessageTimerId = null
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}
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this.clearMessages()
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document.head.removeChild(this.customStyleElement)
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},
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methods: {
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getGiftShowContent(message) {
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return constants.getGiftShowContent(message, this.showGiftName)
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},
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getGiftShowNameAndNum: constants.getGiftShowNameAndNum,
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getShowContent: constants.getShowContent,
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getShowRichContent: constants.getShowRichContent,
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getShowAuthorName: constants.getShowAuthorName,
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addMessage(message) {
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this.addMessages([message])
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},
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addMessages(messages) {
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this.enqueueMessages(messages)
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},
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setCss(css) {
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this.setCssDebounce(css)
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},
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// 后悔加这个功能了
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mergeSimilarText(content) {
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content = content.trim().toLowerCase()
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for (let message of this.iterRecentMessages(5)) {
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if (message.type !== constants.MESSAGE_TYPE_TEXT) {
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continue
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}
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let messageContent = message.content.trim().toLowerCase()
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let longer, shorter
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if (messageContent.length > content.length) {
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longer = messageContent
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shorter = content
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} else {
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longer = content
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shorter = messageContent
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}
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if (
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longer.indexOf(shorter) !== -1 // 长的包含短的
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&& longer.length - shorter.length < shorter.length // 长度差较小
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) {
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this.updateMessage(message.id, {
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$add: {
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repeated: 1
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}
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})
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return true
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}
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}
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return false
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},
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mergeSimilarGift(authorName, price, _freePrice, giftName, num) {
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for (let message of this.iterRecentMessages(5)) {
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if (
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message.type === constants.MESSAGE_TYPE_GIFT
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&& message.authorName === authorName
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&& message.giftName === giftName
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) {
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this.updateMessage(message.id, {
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$add: {
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price: price,
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// freePrice: freePrice, // 暂时没用到
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num: num
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}
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})
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return true
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}
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}
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return false
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},
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// 从新到老迭代num条消息，注意会迭代smoothedMessageQueue，不会迭代paidMessages
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*iterRecentMessages(num, onlyCountAddMessages = true) {
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if (num <= 0) {
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return
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}
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for (let arr of this.iterMessageArrs()) {
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for (let i = arr.length - 1; i >= 0 && num > 0; i--) {
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let message = arr[i]
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yield message
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if (!onlyCountAddMessages || this.isAddMessage(message)) {
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num--
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}
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}
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if (num <= 0) {
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break
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}
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}
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},
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// 从新到老迭代消息的数组
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*iterMessageArrs() {
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for (let i = this.smoothedMessageQueue.length - 1; i >= 0; i--) {
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yield this.smoothedMessageQueue[i]
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}
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yield this.messagesBuffer
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yield this.messages
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},
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delMessage(id) {
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this.delMessages([id])
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},
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delMessages(ids) {
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this.enqueueMessages(ids.map(
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id => ({
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type: constants.MESSAGE_TYPE_DEL,
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id
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})
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))
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},
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clearMessages() {
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this.messages = []
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this.paidMessages = []
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this.smoothedMessageQueue = []
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this.messagesBuffer = []
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this.isSmoothed = true
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this.lastSmoothChatMessageAddMs = null
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this.chatRateMs = 1000
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this.lastSmoothScrollUpdate = null
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this.scrollTimeRemainingMs = this.scrollPixelsRemaining = 0
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this.smoothScrollRafHandle = null
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this.preinsertHeight = 0
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this.maybeResizeScrollContainer()
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if (!this.atBottom) {
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this.scrollToBottom()
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}
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},
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updateMessage(id, newValuesObj) {
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this.enqueueMessages([{
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type: constants.MESSAGE_TYPE_UPDATE,
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id,
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newValuesObj
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}])
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},
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enqueueMessages(messages) {
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// 估计进队列时间间隔
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if (!this.lastEnqueueTime) {
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this.lastEnqueueTime = new Date()
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} else {
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let curTime = new Date()
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let interval = curTime - this.lastEnqueueTime
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// 真实的进队列时间间隔模式大概是这样：2500, 300, 300, 300, 2500, 300, ...
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// B站消息有缓冲，会一次发多条消息。这里把波峰视为发送了一次真实的WS消息，所以要过滤掉间隔太小的
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if (interval > 1000 || this.enqueueIntervals.length < 5) {
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this.enqueueIntervals.push(interval)
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if (this.enqueueIntervals.length > 5) {
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this.enqueueIntervals.splice(0, this.enqueueIntervals.length - 5)
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}
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// 这边估计得尽量大，只要不太早把消息缓冲发完就是平滑的。有MESSAGE_MAX_INTERVAL保底，不会让消息延迟太大
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// 其实可以用单调队列求最大值，偷懒不写了
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this.estimatedEnqueueInterval = Math.max(...this.enqueueIntervals)
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}
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// 上次入队时间还是要设置，否则会太早把消息缓冲发完，然后较长时间没有新消息
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this.lastEnqueueTime = curTime
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}
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// 把messages分成messageGroup，每个组里最多有1个需要平滑的消息
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let messageGroup = []
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for (let message of messages) {
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messageGroup.push(message)
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if (this.isAddMessage(message)) {
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this.smoothedMessageQueue.push(messageGroup)
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messageGroup = []
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}
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}
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// 还剩下不需要平滑的消息
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if (messageGroup.length > 0) {
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if (this.smoothedMessageQueue.length > 0) {
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// 和上一组合并
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let lastMessageGroup = this.smoothedMessageQueue[this.smoothedMessageQueue.length - 1]
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for (let message of messageGroup) {
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lastMessageGroup.push(message)
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}
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} else {
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// 自己一个组
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this.smoothedMessageQueue.push(messageGroup)
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}
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}
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if (!this.emitSmoothedMessageTimerId) {
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this.emitSmoothedMessageTimerId = window.setTimeout(this.emitSmoothedMessages)
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}
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},
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isAddMessage({ type }) {
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return ADD_MESSAGE_TYPES.indexOf(type) !== -1
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},
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emitSmoothedMessages() {
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this.emitSmoothedMessageTimerId = null
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if (this.smoothedMessageQueue.length <= 0) {
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return
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}
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// 估计的下次进队列剩余时间
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let estimatedNextEnqueueRemainTime = 10 * 1000
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if (this.estimatedEnqueueInterval) {
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estimatedNextEnqueueRemainTime = Math.max(this.lastEnqueueTime - new Date() + this.estimatedEnqueueInterval, 1)
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}
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// 计算发送的消息数，保证在下次进队列之前发完
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// 下次进队列之前应该发多少条消息
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let shouldEmitGroupNum = Math.max(this.smoothedMessageQueue.length, 0)
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// 下次进队列之前最多能发多少次
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let maxCanEmitCount = estimatedNextEnqueueRemainTime / MESSAGE_MIN_INTERVAL
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// 这次发多少条消息
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let groupNumToEmit
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if (shouldEmitGroupNum < maxCanEmitCount) {
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// 队列中消息数很少，每次发1条也能发完
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groupNumToEmit = 1
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} else {
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// 每次发1条以上，保证按最快速度能发完
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groupNumToEmit = Math.ceil(shouldEmitGroupNum / maxCanEmitCount)
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}
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// 发消息
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let messageGroups = this.smoothedMessageQueue.splice(0, groupNumToEmit)
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let mergedGroup = []
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for (let messageGroup of messageGroups) {
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for (let message of messageGroup) {
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mergedGroup.push(message)
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}
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}
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this.handleMessageGroup(mergedGroup)
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if (this.smoothedMessageQueue.length <= 0) {
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return
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}
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// 消息没发完，计算下次发消息时间
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let sleepTime
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if (groupNumToEmit === 1) {
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// 队列中消息数很少，随便定个[MESSAGE_MIN_INTERVAL, MESSAGE_MAX_INTERVAL]的时间
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sleepTime = estimatedNextEnqueueRemainTime / this.smoothedMessageQueue.length
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sleepTime *= 0.5 + Math.random()
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if (sleepTime > MESSAGE_MAX_INTERVAL) {
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sleepTime = MESSAGE_MAX_INTERVAL
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} else if (sleepTime < MESSAGE_MIN_INTERVAL) {
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sleepTime = MESSAGE_MIN_INTERVAL
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}
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} else {
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// 按最快速度发
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sleepTime = MESSAGE_MIN_INTERVAL
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}
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this.emitSmoothedMessageTimerId = window.setTimeout(this.emitSmoothedMessages, sleepTime)
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},
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handleMessageGroup(messageGroup) {
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if (messageGroup.length <= 0) {
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return
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}
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for (let message of messageGroup) {
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switch (message.type) {
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case constants.MESSAGE_TYPE_TEXT:
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case constants.MESSAGE_TYPE_GIFT:
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case constants.MESSAGE_TYPE_MEMBER:
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case constants.MESSAGE_TYPE_SUPER_CHAT:
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// 这里处理的类型要和 ADD_MESSAGE_TYPES 一致
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this.handleAddMessage(message)
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break
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case constants.MESSAGE_TYPE_DEL:
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this.handleDelMessage(message)
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break
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case constants.MESSAGE_TYPE_UPDATE:
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this.handleUpdateMessage(message)
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break
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}
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}
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this.maybeResizeScrollContainer()
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this.flushMessagesBuffer()
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this.$nextTick(this.maybeScrollToBottom)
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},
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handleAddMessage(message) {
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// 添加一个本地时间给Ticker用，防止本地时间和服务器时间相差很大的情况
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message.addTime = new Date()
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if (message.type !== constants.MESSAGE_TYPE_TEXT) {
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this.paidMessages.unshift(_.cloneDeep(message))
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const MAX_PAID_MESSAGE_NUM = 100
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if (this.paidMessages.length > MAX_PAID_MESSAGE_NUM) {
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this.paidMessages.splice(MAX_PAID_MESSAGE_NUM, this.paidMessages.length - MAX_PAID_MESSAGE_NUM)
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}
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}
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// 不知道cloneDeep拷贝Vue的响应式对象会不会有问题，保险起见把这句放在后面
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this.messagesBuffer.push(message)
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},
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handleDelMessage({ id }) {
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let arrs = [this.messages, this.paidMessages, this.messagesBuffer]
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let needResetSmoothScroll = false
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for (let arr of arrs) {
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for (let i = 0; i < arr.length; i++) {
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if (arr[i].id !== id) {
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continue
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}
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arr.splice(i, 1)
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if (arr === this.messages) {
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needResetSmoothScroll = true
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}
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break
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}
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}
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if (needResetSmoothScroll) {
|
||
this.resetSmoothScroll()
|
||
}
|
||
},
|
||
handleUpdateMessage({ id, newValuesObj }) {
|
||
let arrs = [this.messages, this.paidMessages, this.messagesBuffer]
|
||
let needResetSmoothScroll = false
|
||
for (let arr of arrs) {
|
||
for (let message of arr) {
|
||
if (message.id !== id) {
|
||
continue
|
||
}
|
||
this.doUpdateMessage(message, newValuesObj)
|
||
if (arr === this.messages) {
|
||
needResetSmoothScroll = true
|
||
}
|
||
break
|
||
}
|
||
}
|
||
if (needResetSmoothScroll) {
|
||
this.resetSmoothScroll()
|
||
}
|
||
},
|
||
doUpdateMessage(message, newValuesObj) {
|
||
// +=
|
||
let addValuesObj = newValuesObj.$add
|
||
if (addValuesObj !== undefined) {
|
||
for (let name in addValuesObj) {
|
||
message[name] += addValuesObj[name]
|
||
}
|
||
}
|
||
|
||
// =
|
||
for (let name in newValuesObj) {
|
||
if (!name.startsWith('$')) {
|
||
message[name] = newValuesObj[name]
|
||
}
|
||
}
|
||
},
|
||
|
||
async flushMessagesBuffer() {
|
||
if (this.messagesBuffer.length <= 0) {
|
||
return
|
||
}
|
||
if (!this.canScrollToBottomOrTimedOut()) {
|
||
if (this.messagesBuffer.length > this.maxNumber) {
|
||
// 未显示消息数 > 最大可显示数，丢弃
|
||
this.messagesBuffer.splice(0, this.messagesBuffer.length - this.maxNumber)
|
||
}
|
||
return
|
||
}
|
||
|
||
let removeNum = Math.max(this.messages.length + this.messagesBuffer.length - this.maxNumber, 0)
|
||
if (removeNum > 0) {
|
||
this.messages.splice(0, removeNum)
|
||
// 防止同时添加和删除项目时所有的项目重新渲染 https://github.com/vuejs/vue/issues/6857
|
||
await this.$nextTick()
|
||
}
|
||
|
||
this.preinsertHeight = this.$refs.items.clientHeight
|
||
for (let message of this.messagesBuffer) {
|
||
this.messages.push(message)
|
||
}
|
||
this.messagesBuffer = []
|
||
// 等items高度变化
|
||
await this.$nextTick()
|
||
this.showNewMessages()
|
||
},
|
||
showNewMessages() {
|
||
let hasScrollBar = this.$refs.items.clientHeight > this.$refs.scroller.clientHeight
|
||
this.$refs.itemOffset.style.height = `${this.$refs.items.clientHeight}px`
|
||
if (!this.canScrollToBottomOrTimedOut() || !hasScrollBar) {
|
||
return
|
||
}
|
||
|
||
// 计算剩余像素
|
||
this.scrollPixelsRemaining += this.$refs.items.clientHeight - this.preinsertHeight
|
||
this.scrollToBottom()
|
||
|
||
// 计算是否平滑滚动、剩余时间
|
||
if (!this.lastSmoothChatMessageAddMs) {
|
||
this.lastSmoothChatMessageAddMs = performance.now()
|
||
}
|
||
let interval = performance.now() - this.lastSmoothChatMessageAddMs
|
||
this.chatRateMs = (0.9 * this.chatRateMs) + (0.1 * interval)
|
||
if (this.isSmoothed) {
|
||
if (this.chatRateMs < 400) {
|
||
this.isSmoothed = false
|
||
}
|
||
} else {
|
||
if (this.chatRateMs > 450) {
|
||
this.isSmoothed = true
|
||
}
|
||
}
|
||
this.scrollTimeRemainingMs += this.isSmoothed ? CHAT_SMOOTH_ANIMATION_TIME_MS : 0
|
||
|
||
if (!this.smoothScrollRafHandle) {
|
||
this.smoothScrollRafHandle = window.requestAnimationFrame(this.smoothScroll)
|
||
}
|
||
this.lastSmoothChatMessageAddMs = performance.now()
|
||
},
|
||
smoothScroll(time) {
|
||
if (!this.lastSmoothScrollUpdate) {
|
||
// 第一帧
|
||
this.lastSmoothScrollUpdate = time
|
||
this.smoothScrollRafHandle = window.requestAnimationFrame(this.smoothScroll)
|
||
return
|
||
}
|
||
|
||
let interval = time - this.lastSmoothScrollUpdate
|
||
if (
|
||
this.scrollPixelsRemaining <= 0 || this.scrollPixelsRemaining >= 400 // 已经滚动到底部或者离底部太远则结束
|
||
|| interval >= 1000 // 离上一帧时间太久，可能用户切换到其他网页
|
||
|| this.scrollTimeRemainingMs <= 0 // 时间已结束
|
||
) {
|
||
this.resetSmoothScroll()
|
||
return
|
||
}
|
||
|
||
let pixelsToScroll = interval / this.scrollTimeRemainingMs * this.scrollPixelsRemaining
|
||
this.scrollPixelsRemaining -= pixelsToScroll
|
||
if (this.scrollPixelsRemaining < 0) {
|
||
this.scrollPixelsRemaining = 0
|
||
}
|
||
this.scrollTimeRemainingMs -= interval
|
||
if (this.scrollTimeRemainingMs < 0) {
|
||
this.scrollTimeRemainingMs = 0
|
||
}
|
||
this.lastSmoothScrollUpdate = time
|
||
this.smoothScrollRafHandle = window.requestAnimationFrame(this.smoothScroll)
|
||
},
|
||
resetSmoothScroll() {
|
||
this.scrollTimeRemainingMs = this.scrollPixelsRemaining = 0
|
||
this.lastSmoothScrollUpdate = null
|
||
if (this.smoothScrollRafHandle) {
|
||
window.cancelAnimationFrame(this.smoothScrollRafHandle)
|
||
this.smoothScrollRafHandle = null
|
||
}
|
||
},
|
||
|
||
maybeResizeScrollContainer() {
|
||
this.$refs.itemOffset.style.height = `${this.$refs.items.clientHeight}px`
|
||
this.$refs.itemOffset.style.minHeight = `${this.$refs.scroller.clientHeight}px`
|
||
this.maybeScrollToBottom()
|
||
},
|
||
maybeScrollToBottom() {
|
||
if (this.canScrollToBottomOrTimedOut()) {
|
||
this.scrollToBottom()
|
||
}
|
||
},
|
||
scrollToBottom() {
|
||
this.$refs.scroller.scrollTop = Math.pow(2, 24)
|
||
this.atBottom = true
|
||
},
|
||
onScroll() {
|
||
this.refreshCantScrollStartTime()
|
||
let scroller = this.$refs.scroller
|
||
this.atBottom = scroller.scrollHeight - scroller.scrollTop - scroller.clientHeight < SCROLLED_TO_BOTTOM_EPSILON
|
||
this.flushMessagesBuffer()
|
||
},
|
||
canScrollToBottomOrTimedOut() {
|
||
if (this.canScrollToBottom) {
|
||
return true
|
||
}
|
||
// 防止在OBS中卡住，超过一定时间也可以自动滚动
|
||
return new Date() - this.cantScrollStartTime >= 5 * 1000
|
||
},
|
||
refreshCantScrollStartTime() {
|
||
// 有鼠标事件时刷新，防止用户看弹幕时自动滚动
|
||
if (this.cantScrollStartTime) {
|
||
this.cantScrollStartTime = new Date()
|
||
}
|
||
}
|
||
}
|
||
})
|
||
</script>
|
||
|
||
<style src="@/assets/css/youtube/yt-html.css"></style>
|
||
<style src="@/assets/css/youtube/yt-live-chat-renderer.css"></style>
|
||
<style src="@/assets/css/youtube/yt-live-chat-item-list-renderer.css"></style> |