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B站视频播放页（普通模式、稍后再看模式）、番剧播放页、直播间添加获取封面的按钮
当前为
// ==UserScript==
// @name B站封面获取
// @version 4.11.7.20210717
// @namespace laster2800
// @author Laster2800
// @description B站视频播放页（普通模式、稍后再看模式）、番剧播放页、直播间添加获取封面的按钮
// @icon https://www.bilibili.com/favicon.ico
// @homepage http://greasyfork.icu/zh-CN/scripts/395575
// @supportURL http://greasyfork.icu/zh-CN/scripts/395575/feedback
// @license LGPL-3.0
// @include *://www.bilibili.com/video/*
// @include *://www.bilibili.com/bangumi/play/*
// @include *://www.bilibili.com/medialist/play/watchlater
// @include *://www.bilibili.com/medialist/play/watchlater/*
// @include *://live.bilibili.com/*
// @exclude *://live.bilibili.com/
// @exclude *://live.bilibili.com/?*
// @exclude *://live.bilibili.com/*/*
// @require http://greasyfork.icu/scripts/409641-userscriptapi/code/UserscriptAPI.js?version=951336
// @grant GM_addStyle
// @grant GM_download
// @grant GM_notification
// @grant GM_xmlhttpRequest
// @grant GM_setValue
// @grant GM_getValue
// @grant GM_deleteValue
// @grant GM_registerMenuCommand
// @grant GM_unregisterMenuCommand
// @grant unsafeWindow
// @grant window.onurlchange
// @connect api.bilibili.com
// @incompatible firefox 完全不兼容 Greasemonkey，不完全兼容 Violentmonkey
// ==/UserScript==
(function() {
'use strict'
const gm = {
id: 'gm395575',
configVersion: GM_getValue('configVersion'),
configUpdate: 20210711,
config: {
preview: true,
download: true,
},
configMap: {
preview: { name: '封面预览' },
download: { name: '点击下载', needNotReload: true },
},
url: {
noop: 'javascript:void(0)',
},
regex: {
page_videoNormalMode: /\.com\/video(?=[/?#]|$)/,
page_videoWatchlaterMode: /\.com\/medialist\/play\/watchlater(?=[/?#]|$)/,
page_bangumi: /\/bangumi\/play(?=[/?#]|$)/,
page_live: /live\.bilibili\.com\/\d+(?=[/?#]|$)/, // 只含具体的直播间页面
},
const: {
title: '点击保存封面或在新标签页中打开图片（可在脚本菜单中设置）。\n此外，可在脚本菜单中开启或关闭封面预览功能。\n右键点击可基于图片链接作进一步的处理，如通过「另存为」直接保存图片。',
notificationTimeout: 5600,
},
}
/* global UserscriptAPI */
const api = new UserscriptAPI({
id: gm.id,
label: GM_info.script.name,
})
/** @type {Script} */
let script = null
/** @type {Webpage} */
let webpage = null
class Script {
/**
* 初始化脚本
*/
init() {
this.updateVersion()
for (const name in gm.config) {
const eb = GM_getValue(name)
gm.config[name] = typeof eb == 'boolean' ? eb : gm.config[name]
}
}
/**
* 初始化脚本菜单
*/
initScriptMenu() {
const config = gm.config
const configMap = gm.configMap
let menuId = {}
setTimeout(() => {
for (const id in config) {
menuId[id] = createMenuItem(id)
}
})
const cfgName = id => `[ ${config[id] ? '√' : '×'} ] ${configMap[id].name}`
const createMenuItem = id => {
return GM_registerMenuCommand(cfgName(id), () => {
config[id] = !config[id]
GM_setValue(id, config[id])
GM_notification({
text: `已${config[id] ? '开启' : '关闭'}「${configMap[id].name}」功能${configMap[id].needNotReload ? '' : '，刷新页面以生效（点击通知以刷新）'}。`,
timeout: gm.const.notificationTimeout,
onclick: configMap[id].needNotReload ? null : () => location.reload(),
})
clearMenu()
this.initScriptMenu()
})
}
const clearMenu = () => {
for (const id in menuId) {
GM_unregisterMenuCommand(menuId[id])
}
menuId = {}
}
}
/**
* 版本更新处理
*/
updateVersion() {
if (isNaN(gm.configVersion) || gm.configVersion < 0) {
gm.configVersion = gm.configUpdate
GM_setValue('configVersion', gm.configVersion)
} else if (gm.configVersion < gm.configUpdate) {
// 必须按从旧到新的顺序写
// 内部不能使用 gm.configUpdate，必须手写更新后的配置版本号！
// 4.10.0.20210711
if (gm.configVersion < 20210711) {
GM_deleteValue('preview')
}
// 功能性更新后更新此处配置版本
if (gm.configVersion < 20210711) {
GM_notification({ text: '功能性更新完毕，您可能需要重新设置脚本。' })
}
gm.configVersion = gm.configUpdate
GM_setValue('configVersion', gm.configVersion)
}
}
}
class Webpage {
constructor() {
this.method = {
/**
* 下载封面
* @param {string} url 封面 URL
* @param {string} [name='Cover'] 保存文件名
*/
download(url, name) {
name = name || 'Cover'
const onerror = function(error) {
if (error?.error == 'not_whitelisted') {
alert(`【${GM_info.script.name}】\n\n该封面的文件格式不在下载模式白名单中，从而触发安全限制导致无法直接下载。可修改脚本管理器的「下载模式」或「文件扩展名白名单」设置以放开限制。`)
window.open(url)
} else {
GM_notification({
text: '下载错误',
timeout: gm.const.notificationTimeout,
})
}
}
const ontimeout = function() {
GM_notification({
text: '下载超时',
timeout: gm.const.notificationTimeout,
})
window.open(url)
}
api.web.download({ url, name, onerror, ontimeout })
},
/**
* 获取 `aid`
* @async
* @returns {Promise<string>} `aid`
*/
async getAid() {
const aid = unsafeWindow.aid || await api.wait.waitForConditionPassed({
condition: () => unsafeWindow.player?.getVideoMessage?.()?.aid,
})
return String(aid ?? '')
},
/**
* 下载图片
* @param {HTMLElement} target 图片按钮元素
*/
addDownloadEvent(target) {
const _self = this
// 此处必须用 mousedown，否则无法与动态获取封面的代码达成正确的联动
target.addEventListener('mousedown', function(e) {
if (gm.config.download && e.button == 0) {
e.preventDefault()
target.dispatchEvent(new Event('mouseleave'))
target.disablePreview = true
_self.download(this.href, document.title)
}
})
// 开启下载时，若没有以下处理器，则鼠标左键长按图片按钮，过一段时间后再松开，松开时依然会触发默认点击事件（在新标签页打开封面）
target.addEventListener('click', function(e) {
if (gm.config.download) {
e.preventDefault()
}
})
},
/**
* 创建预览元素
* @param {HTMLElement} target 触发元素
* @returns {HTMLImageElement}
*/
createPreview(target) {
const _self = this
const preview = document.body.appendChild(document.createElement('img'))
preview.className = `${gm.id}_preview`
const fadeTime = 200
const browserSyncTime = 10
const antiConflictTime = 20
const fadeIn = () => {
preview.style.display = 'unset'
setTimeout(() => {
preview.style.opacity = '1'
}, browserSyncTime)
}
const fadeOut = callback => {
preview.style.opacity = '0'
setTimeout(() => {
preview.style.display = 'none'
callback?.()
}, fadeTime)
}
const disablePreviewTemp = () => {
target.disablePreview = true
setTimeout(() => {
if (!target.mouseOver) {
target.disablePreview = false
}
}, 80)
}
target.addEventListener('mouseenter', api.tool.debounce(function() {
const _self = target
if (gm.config.preview) {
_self.mouseOver = true
if (_self.disablePreview) return
setTimeout(() => {
preview.src && fadeIn()
}, antiConflictTime)
}
}, 200))
target.addEventListener('mouseleave', api.tool.debounce(function() {
const _self = target
if (gm.config.preview) {
_self.mouseOver = false
if (_self.disablePreview) {
_self.disablePreview = false
return
}
setTimeout(() => {
preview.src && !preview.mouseOver && fadeOut()
}, antiConflictTime)
}
}, 200))
let startPos = null // 鼠标进入预览时的初始坐标
preview.onmouseenter = function() {
this.mouseOver = true
}
preview.onmouseleave = function() {
this.mouseOver = false
startPos = undefined
setTimeout(() => {
preview.src && fadeOut()
}, antiConflictTime)
}
preview.addEventListener('mousedown', function(e) {
if (this.src) {
if (e.button == 0 || e.button == 1) {
if (e.button == 0) {
if (gm.config.download) {
_self.download(this.src, document.title)
} else {
window.open(this.src)
}
} else {
window.open(this.src)
}
fadeOut(disablePreviewTemp)
}
}
})
preview.addEventListener('wheel', function() {
// 滚动时关闭预览，优化用户体验
fadeOut(disablePreviewTemp)
})
preview.addEventListener('mousemove', function(e) {
// 鼠标移动一段距离关闭预览，优化用户体验
if (startPos) {
const dSquare = (startPos.x - e.clientX) ** 2 + (startPos.y - e.clientY) ** 2
if (dSquare > 20 ** 2) { // 20px
fadeOut(disablePreviewTemp)
}
} else {
startPos = {
x: e.clientX,
y: e.clientY,
}
}
})
GM_addStyle(`
.${gm.id}_preview {
position: fixed;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
z-index: 142857;
max-width: 60vw; /* 自适应宽度和高度 */
max-height: 100vh;
display: none;
transition: opacity ${fadeTime}ms ease-in-out;
opacity: 0;
cursor: pointer;
}
`)
return preview
},
}
}
addVideoBtn(atr) {
const _self = this
const bus = {}
const cover = document.createElement('a')
const errorMsg = '获取失败，若非网络问题请提供反馈'
cover.innerText = '获取封面'
cover.className = 'appeal-text'
cover.onclick = e => e.stopPropagation()
const preview = _self.method.createPreview(cover)
// 确保与其他脚本配合时相关 UI 排列顺序不会乱
const gm395456 = atr.querySelector('[id|=gm395456]')
if (gm395456) {
atr.insertBefore(cover, gm395456)
} else {
atr.appendChild(cover)
}
const main = async function(e) {
try {
const url = await getCover()
bus.cover = url
bus.aid = await _self.method.getAid()
bus.pathname = location.pathname
setCover(url)
window.addEventListener('urlchange', async function() {
if (location.pathname == bus.pathname) return // 并非切换视频（如切分 P）
try {
bus.pathname = location.pathname
bus.aid = await api.wait.waitForConditionPassed({
condition: async () => {
// 要等 aid 跟之前存的不一样，才能说明是切换成功后获取到的 aid
const aid = await _self.method.getAid()
if (aid && aid != bus.aid) {
return aid
}
},
})
updateCover()
} catch (e) {
setCover(false)
api.logger.error(e)
}
})
} catch (e) {
setCover(false)
api.logger.error(e)
}
cover.removeEventListener('mousedown', main)
if (gm.config.preview) {
cover.removeEventListener('mouseover', main)
}
if (e) {
e.preventDefault()
if (e.type == 'mousedown') {
if (e.button == 0) {
if (gm.config.download || !cover.loaded) {
cover.dispatchEvent(e) // 无法触发链接点击跳转
} else {
window.open(cover.href)
}
} else if (e.button == 1) {
if (cover.loaded) {
window.open(cover.href)
}
}
} else if (e.type == 'mouseover') {
cover.dispatchEvent(new Event('mouseenter'))
}
}
}
cover.addEventListener('mousedown', main)
if (gm.config.preview) {
cover.addEventListener('mouseover', main)
}
const updateCover = async () => {
try {
bus.cover = await api.wait.waitForConditionPassed({
condition: async () => {
// aid 变化只能说明视频确实变了，但 cover 可能还没变
const cover = await getCover()
if (cover && cover != bus.cover) {
return cover
}
},
})
setCover(bus.cover)
} catch (e) {
setCover(false)
api.logger.error(e)
}
}
const setCover = coverUrl => {
if (coverUrl) {
cover.title = gm.const.title
cover.href = coverUrl
cover.target = '_blank'
cover.loaded = true
_self.method.addDownloadEvent(cover)
preview.src = coverUrl
} else {
cover.title = errorMsg
cover.href = gm.url.noop
cover.target = '_self'
cover.loaded = false
preview.src = ''
cover.addEventListener('mousedown', function(e) {
if (e.button == 0 || e.button == 1) {
e.preventDefault()
api.message.create(errorMsg)
}
})
}
}
const getCover = async () => {
let cover = null
if (api.web.urlMatch(gm.regex.page_videoNormalMode)) {
const meta = await api.wait.waitForElementLoaded({
selector: 'meta[itemprop=image]',
base: document.head,
timeout: 2000,
stopOnTimeout: true,
})
cover = meta.content
} else {
const aid = await _self.method.getAid()
const resp = await api.web.request({
method: 'GET',
url: `https://api.bilibili.com/x/web-interface/view?aid=${aid}`,
})
cover = JSON.parse(resp.responseText).data.pic
}
return cover ?? ''
}
}
addBangumiBtn(tm) {
const _self = this
const bus = {}
const cover = document.createElement('a')
const errorMsg = '获取失败，若非网络问题请提供反馈'
cover.innerText = '获取封面'
cover.className = `${gm.id}_cover_btn`
cover.onclick = e => e.stopPropagation()
tm.appendChild(cover)
const preview = _self.method.createPreview(cover)
const main = async function(e) {
try {
const url = await getCover()
bus.cover = url
bus.aid = await _self.method.getAid()
setCover(url)
window.addEventListener('urlchange', async function() {
try {
bus.aid = await api.wait.waitForConditionPassed({
condition: async () => {
// 要等 aid 跟之前存的不一样，才能说明是切换成功后获取到的 aid
const aid = await _self.method.getAid()
if (aid && aid != bus.aid) {
return aid
}
},
})
updateCover()
} catch (e) {
setCover(false)
api.logger.error(e)
}
})
} catch (e) {
setCover(false)
api.logger.error(e)
}
cover.removeEventListener('mousedown', main)
if (gm.config.preview) {
cover.removeEventListener('mouseover', main)
}
if (e) {
e.preventDefault()
if (e.type == 'mousedown') {
if (e.button == 0) {
if (gm.config.download || !cover.loaded) {
cover.dispatchEvent(e) // 无法触发链接点击跳转
} else {
window.open(cover.href)
}
} else if (e.button == 1) {
if (cover.loaded) {
window.open(cover.href)
}
}
} else if (e.type == 'mouseover') {
cover.dispatchEvent(new Event('mouseenter'))
}
}
}
cover.addEventListener('mousedown', main)
if (gm.config.preview) {
cover.addEventListener('mouseover', main)
}
GM_addStyle(`
.${gm.id}_cover_btn {
float: right;
cursor: pointer;
font-size: 12px;
margin-right: 16px;
line-height: 36px;
color: #505050;
}
.${gm.id}_cover_btn:hover {
color: #00a1d6;
}
`)
const updateCover = async () => {
try {
bus.cover = await api.wait.waitForConditionPassed({
condition: async () => {
// aid 变化只能说明视频确实变了，但 cover 可能还没变
const cover = await getCover()
if (cover && cover != bus.cover) {
return cover
}
},
})
setCover(bus.cover)
} catch (e) {
// 在番剧中，切换 URL 后封面不变是正常的，说明切换后还是同一部番
}
}
const setCover = coverUrl => {
if (coverUrl) {
cover.title = gm.const.title
cover.href = coverUrl
cover.target = '_blank'
cover.loaded = true
_self.method.addDownloadEvent(cover)
preview.src = coverUrl
} else {
cover.title = errorMsg
cover.href = gm.url.noop
cover.target = '_self'
cover.loaded = false
preview.src = ''
cover.addEventListener('mousedown', function(e) {
if (e.button == 0 || e.button == 1) {
e.preventDefault()
api.message.create(errorMsg)
}
})
}
}
const getCover = async () => {
const img = await api.wait.waitForElementLoaded({
selector: '.media-cover img',
timeout: 2000,
stopOnTimeout: true,
})
return img.src.replace(/@[^@]*$/, '') ?? '' // 不要缩略图
}
}
addLiveBtn(urc) {
const _self = this
const info = unsafeWindow.__NEPTUNE_IS_MY_WAIFU__.roomInfoRes.data.room_info
const coverUrl = info.cover
const kfUrl = info.keyframe
const cover = document.createElement('a')
cover.innerText = '获取封面'
if (coverUrl) {
cover.title = gm.const.title
cover.href = coverUrl
cover.target = '_blank'
cover.loaded = true
_self.method.addDownloadEvent(cover)
_self.method.createPreview(cover).src = coverUrl
} else if (kfUrl) {
cover.title = `直播间没有设置封面，或者因不明原因无法获取到封面，点击获取关键帧：\n${kfUrl}`
cover.href = kfUrl
cover.target = '_blank'
cover.loaded = true
_self.method.addDownloadEvent(cover)
_self.method.createPreview(cover).src = kfUrl
} else {
const errorMsg = '获取失败，若非网络问题请提供反馈'
cover.title = errorMsg
cover.href = gm.url.noop
cover.target = '_self'
cover.loaded = false
cover.addEventListener('mousedown', function(e) {
if (e.button == 0 || e.button == 1) {
api.message.create(errorMsg)
}
})
}
cover.className = `${gm.id}_cover_btn`
urc.insertBefore(cover, urc.firstChild)
GM_addStyle(`
.${gm.id}_cover_btn {
cursor: pointer;
color: rgb(153, 153, 153);
}
.${gm.id}_cover_btn:hover {
color: #23ade5;
}
`)
}
}
(async function() {
if (GM_info.scriptHandler != 'Tampermonkey') {
api.dom.initUrlchangeEvent()
}
script = new Script()
webpage = new Webpage()
script.init()
script.initScriptMenu()
if (api.web.urlMatch([gm.regex.page_videoNormalMode, gm.regex.page_videoWatchlaterMode], 'OR')) {
const app = await api.wait.waitQuerySelector('#app')
webpage.addVideoBtn(
await api.wait.waitForConditionPassed({
condition: async () => app.__vue__ && await api.wait.waitQuerySelector('#arc_toolbar_report'),
})
)
} else if (api.web.urlMatch(gm.regex.page_bangumi)) {
const app = await api.wait.waitQuerySelector('#app')
webpage.addBangumiBtn(
await api.wait.waitForConditionPassed({
condition: async () => app.__vue__ && await api.wait.waitQuerySelector('#toolbar_module'),
})
)
} else if (api.web.urlMatch(gm.regex.page_live)) {
const hiVm = await api.wait.waitQuerySelector('#head-info-vm')
webpage.addLiveBtn(
await api.wait.waitForConditionPassed({
condition: async () => hiVm.__vue__ && await api.wait.waitQuerySelector('.room-info-upper-row .upper-right-ctnr', hiVm),
})
)
}
})()
})()