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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 4.8.1.20210423
// @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 /.*:\/\/.*:\/\/.*/
// @require http://greasyfork.icu/scripts/409641-api/code/API.js?version=849812
// @grant GM_addStyle
// @grant GM_download
// @grant GM_setValue
// @grant GM_getValue
// @grant GM_xmlhttpRequest
// @grant GM_registerMenuCommand
// @grant GM_unregisterMenuCommand
// @connect api.bilibili.com
// @incompatible firefox 不支持 Greasemonkey！Tampermonkey、Violentmonkey 可用
// ==/UserScript==
(function() {
'use strict'
// 脚本兼容
let incompatible = false
let scriptHandler = '当前脚本管理器'
if (!GM_info || !GM_info.script || !GM_info.scriptHandler) {
incompatible = true
}
if (GM_info && GM_info.scriptHandler) {
scriptHandler = GM_info.scriptHandler
if (scriptHandler == 'Greasemonkey') {
incompatible = true
}
}
if (incompatible) {
const label = GM_info && GM_info.script && GM_info.script.name ? `【${GM_info.script.name}】\n\n` : ''
alert(`${label}脚本不支持${scriptHandler}！请改用Tampermonkey或Violentmonkey。`)
return
}
const gm = {
id: 'gm395575',
title: '点击保存封面或在新标签页中打开图片（可在脚本菜单中设置）。\n此外，可在脚本菜单中开启或关闭封面预览功能。\n右键点击可基于图片链接作进一步的处理，如通过「另存为」直接保存图片。',
enable: {
preview: true,
download: true,
},
fnName: {
preview: '封面预览',
download: '点击下载',
}
}
/* global API */
const api = new API({
id: gm.id,
label: GM_info.script.name,
})
const createMenu = name => {
const afterSwitch = () => !gm.enable[name] ? '开启' : '关闭'
let id = GM_registerMenuCommand(afterSwitch() + gm.fnName[name], menuCallback)
function menuCallback() {
gm.enable[name] = !gm.enable[name]
GM_setValue(name, gm.enable[name])
GM_unregisterMenuCommand(id)
id = GM_registerMenuCommand(afterSwitch() + gm.fnName[name], menuCallback)
}
}
for (const name in gm.enable) {
const eb = GM_getValue(name)
gm.enable[name] = typeof eb == 'boolean' ? eb : gm.enable[name]
createMenu(name)
}
(async function() {
try {
if (api.web.urlMatch([/\/video\//, /\/medialist\/play\/watchlater(?=\/|$)/], 'OR')) {
addVideoBtn(
await api.wait.waitForConditionPassed({
condition: () => {
const app = document.querySelector('#app')
const vueLoad = app && app.__vue__
if (!vueLoad) {
return false
}
return document.querySelector('#arc_toolbar_report')
},
})
)
} else if (api.web.urlMatch(/\/bangumi\/play\//)) {
addBangumiBtn(
await api.wait.waitForConditionPassed({
condition: () => {
const app = document.querySelector('#app')
const vueLoad = app && app.__vue__
if (!vueLoad) {
return false
}
return document.querySelector('#toolbar_module')
},
})
)
} else if (api.web.urlMatch(/live\.bilibili\.com\/\d/)) {
addLiveBtn(
await api.wait.waitForConditionPassed({
condition: () => {
const hiVm = document.querySelector('#head-info-vm')
const vueLoad = hiVm && hiVm.__vue__
if (!vueLoad) {
return false
}
return hiVm.querySelector('.room-info-upper-row .upper-right-ctnr')
},
})
)
}
} catch (e) {
api.logger.error(e)
}
})()
function addVideoBtn(atr) {
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.target = '_blank'
cover.className = 'appeal-text'
cover.onclick = e => e.stopPropagation()
const preview = 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)
}
setTimeout(async () => {
try {
const cover = await getCover()
bus.cover = cover
bus.aid = await getAid()
bus.pathname = location.pathname
setCover(cover)
api.dom.createLocationchangeEvent()
window.addEventListener('locationchange', async function() {
if (location.pathname == bus.pathname) { // 并非切换视频（如切分 P）
return
}
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 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)
}
})
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.href = coverUrl
preview.src = coverUrl
addDownloadEvent(cover)
createPreview(cover).src = coverUrl
} else {
cover.href = 'javascript:void(0)'
preview.src = ''
cover.onclick = function(e) {
e.preventDefault()
alert(errorMsg)
}
}
cover.title = gm.title || errorMsg
}
const getAid = async () => {
let aid
try {
if (unsafeWindow.aid) {
aid = unsafeWindow.aid
} else {
aid = await api.wait.waitForConditionPassed({
condition: () => {
const player = unsafeWindow.player
const message = player && player.getVideoMessage && player.getVideoMessage()
return message && message.aid
},
})
}
} catch (e) {
api.logger.error(e)
}
return String(aid || '')
}
const getCover = async () => {
let cover = ''
if (api.web.urlMatch(/\/video\//)) {
cover = await api.wait.waitForConditionPassed({
condition: () => {
const coverMeta = document.querySelector('head meta[itemprop=image]')
return coverMeta && coverMeta.content
},
timeout: 2000,
})
} else {
const aid = await getAid()
const resp = await api.web.request({
method: 'GET',
url: `https://api.bilibili.com/x/web-interface/view?aid=${aid}`,
})
cover = JSON.parse(resp.responseText).data.pic
}
return cover
}
}
function addBangumiBtn(tm) {
const coverMeta = document.querySelector('head meta[property="og:image"]')
const coverUrl = coverMeta && coverMeta.content
const cover = document.createElement('a')
const errorMsg = '获取失败，若非网络问题请提供反馈'
cover.innerText = '获取封面'
cover.target = '_blank'
if (coverUrl) {
cover.href = coverUrl
addDownloadEvent(cover)
createPreview(cover).src = coverUrl
} else {
cover.onclick = () => alert(errorMsg)
}
cover.title = gm.title || errorMsg
cover.className = `${gm.id}_cover_btn`
tm.appendChild(cover)
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;
}
`)
}
function addLiveBtn(urc) {
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'
cover.target = '_blank'
if (coverUrl) {
cover.href = coverUrl
cover.title = gm.title
addDownloadEvent(cover)
createPreview(cover).src = coverUrl
} else if (kfUrl) {
cover.href = 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${kfUrl}`
addDownloadEvent(cover)
createPreview(cover).src = kfUrl
} else {
const errorMsg = '获取失败，若非网络问题请提供反馈'
cover.onclick = () => alert(errorMsg)
cover.title = errorMsg
}
cover.className = `${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;
}
`)
}
/**
* 下载图片
* @param {HTMLElement} target 图片按钮元素
*/
function addDownloadEvent(target) {
target.onclick = function(e) {
if (gm.enable.download) {
e.preventDefault()
target.dispatchEvent(new Event('mouseleave'))
target.disablePreview = true
GM_download(this.href, document.title || 'Cover')
}
}
}
/**
* 创建预览元素
* @param {HTMLElement} target 触发元素
* @returns {HTMLImageElement}
*/
function createPreview(target) {
const preview = document.body.appendChild(document.createElement('img'))
preview.className = `${gm.id}_preview`
const fadeTime = 200
const browserSyncTime = 10
const antiConflictTime = 20
const fadeIn = () => {
preview.style.display = 'unset'
setTimeout(() => {
preview.style.opacity = '1'
}, browserSyncTime)
}
const fadeOut = callback => {
preview.style.opacity = '0'
setTimeout(() => {
preview.style.display = 'none'
callback && callback()
}, fadeTime)
}
const disablePreviewTemp = () => {
target.disablePreview = true
setTimeout(() => {
if (!target.mouseOver) {
target.disablePreview = false
}
}, 80)
}
target.addEventListener('mouseenter', function() {
if (gm.enable.preview) {
this.mouseOver = true
if (this.disablePreview) {
return
}
setTimeout(() => {
preview.src && fadeIn()
}, antiConflictTime)
}
})
target.addEventListener('mouseleave', function() {
if (gm.enable.preview) {
this.mouseOver = false
if (this.disablePreview) {
this.disablePreview = false
return
}
setTimeout(() => {
preview.src && !preview.mouseOver && fadeOut()
}, antiConflictTime)
}
})
let startPos // 鼠标进入预览时的初始坐标
preview.onmouseenter = function() {
this.mouseOver = true
}
preview.onmouseleave = function() {
this.mouseOver = false
startPos = undefined
setTimeout(() => {
preview.src && fadeOut()
}, antiConflictTime)
}
preview.onclick = function() {
if (this.src) {
if (gm.enable.download) {
GM_download(this.src, document.title)
} else {
window.open(this.src)
}
fadeOut(disablePreviewTemp)
}
}
preview.addEventListener('wheel', function() {
// 滚动时关闭预览，优化用户体验
fadeOut(disablePreviewTemp)
})
preview.addEventListener('mousemove', function(e) {
// 鼠标移动一段距离关闭预览，优化用户体验
if (startPos) {
const dSquare = (startPos.x - e.clientX) ** 2 + (startPos.y - e.clientY) ** 2
if (dSquare > 20 ** 2) { // 20px
fadeOut(disablePreviewTemp)
}
} else {
startPos = {
x: e.clientX,
y: e.clientY,
}
}
})
GM_addStyle(`
.${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
}
})()