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
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// ==UserScript==
// @id BilibiliCover@Laster2800
// @name B站封面获取
// @version 4.5.3.20200731
// @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
// @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/*/*
// @grant GM_addStyle
// @grant GM_download
// @grant GM_setValue
// @grant GM_getValue
// @grant GM_registerMenuCommand
// @grant GM_unregisterMenuCommand
// ==/UserScript==
(function() {
var 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',
}
}
var createMenu = name => {
var afterSwitch = () => !gm.enable[name] ? '开启' : '关闭'
var 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 (var name in gm.enable) {
var eb = GM_getValue(name)
gm.enable[name] = typeof eb == 'boolean' ? eb : gm.enable[name]
createMenu(name)
}
if (/\/video\//.test(location.href)) {
executeAfterConditionPassed({
condition: () => {
var app = document.querySelector('#app')
var vueLoad = app && app.__vue__
if (!vueLoad) {
return false
}
return document.querySelector('#arc_toolbar_report')
},
callback: addVideoBtn,
})
} else if (/\/bangumi\/play\//.test(location.href)) {
executeAfterConditionPassed({
condition: () => {
var app = document.querySelector('#app')
var vueLoad = app && app.__vue__
if (!vueLoad) {
return false
}
return document.querySelector('#toolbar_module')
},
callback: addBangumiBtn,
})
} else if (/live\.bilibili\.com\/\d/.test(location.href)) {
executeAfterConditionPassed({
condition: () => {
var hiVm = document.querySelector('#head-info-vm')
var vueLoad = hiVm && hiVm.__vue__
if (!vueLoad) {
return false
}
return hiVm.querySelector('.room-info-upper-row .upper-right-ctnr')
},
callback: addLiveBtn,
})
} else if (/\/medialist\/play\/watchlater(?=\/|$)/.test(location.href)) {
executeAfterConditionPassed({
condition: () => {
var app = document.querySelector('#app')
var vueLoad = app && app.__vue__
if (!vueLoad) {
return false
}
return app.querySelector('#playContainer .left-container .play-options .play-options-more')
},
callback: addWatchlaterVideoBtn,
})
}
function addVideoBtn(atr) {
var coverMeta = document.querySelector('head meta[itemprop=image]')
var coverUrl = coverMeta && coverMeta.content
var cover = document.createElement('a')
var errorMsg = '获取失败，若非网络问题请提供反馈'
cover.innerText = '获取封面'
cover.target = '_blank'
if (coverUrl) {
cover.href = coverUrl
addDownloadEvent(cover)
createPreview(cover).src = coverUrl
} else {
cover.onclick = () => alert(errorMsg)
}
cover.title = gm.title || errorMsg
cover.className = 'appeal-text'
// 确保与其他脚本配合时相关 UI 排列顺序不会乱
var gm395456 = atr.querySelector('[id|=gm395456]')
if (gm395456) {
atr.insertBefore(cover, gm395456)
} else {
atr.appendChild(cover)
}
}
function addBangumiBtn(tm) {
var coverMeta = document.querySelector('head meta[property="og:image"]')
var coverUrl = coverMeta && coverMeta.content
var cover = document.createElement('a')
var errorMsg = '获取失败，若非网络问题请提供反馈'
cover.innerText = '获取封面'
cover.target = '_blank'
if (coverUrl) {
cover.href = coverUrl
addDownloadEvent(cover)
createPreview(cover).src = coverUrl
} else {
cover.onclick = () => alert(errorMsg)
}
cover.title = gm.title || errorMsg
cover.className = `${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) {
try {
var data = unsafeWindow.__NEPTUNE_IS_MY_WAIFU__.baseInfoRes.data
var coverUrl = data.user_cover
var kfUrl = data.keyframe
} catch (e) {
console.error(e)
}
var 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 {
var 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);
}
.${gm.id}_cover_btn:hover {
color: #23ade5;
}
`)
}
function addWatchlaterVideoBtn(pom) {
var bus = {}
var cover = document.createElement('a')
var errorMsg = '获取失败，可能是因为该视频已经移除出稍后再看；也可能是网络原因，可刷新并尝试。如果还是不行请联系脚本作者……'
cover.innerText = '获取封面'
cover.target = '_blank'
cover.className = `${gm.id}_cover_btn`
cover.onclick = e => e.stopPropagation()
var preview = createPreview(cover)
// 确保与其他脚本配合时相关 UI 排列顺序不会乱
var gmContainer = pom.querySelector('[id=gm-container]')
if (!gmContainer) {
gmContainer = pom.appendChild(document.createElement('span'))
gmContainer.id = 'gm-container'
gmContainer.style.float = 'left'
}
gmContainer.appendChild(cover)
executeAfterConditionPassed({
condition: () => {
var app = document.querySelector('#app')
var vueLoad = app && app.__vue__
if (!vueLoad) {
return false
}
var playContainer = app.querySelector('#playContainer')
if (playContainer.__vue__.playCover) {
return playContainer
}
},
callback: playContainer => {
bus.playContainer = playContainer
bus.cover = playContainer.__vue__.playCover
setCover(bus.cover)
createLocationchangeEvent()
window.addEventListener('locationchange', function() {
updateCoverUrl()
})
},
timeout: 2000,
onTimeout: () => setCover(false)
})
var updateCoverUrl = () => {
executeAfterConditionPassed({
condition: () => {
var cover = bus.playContainer.__vue__.playCover
if (cover && cover != bus.cover) {
return cover
}
},
callback: cover => {
bus.cover = cover
setCover(cover)
},
timeout: 2000,
onTimeout: () => setCover(false)
})
}
var setCover = coverUrl => {
if (coverUrl) {
cover.href = coverUrl
preview.src = coverUrl
addDownloadEvent(cover)
} else {
cover.href = ''
preview.src = ''
cover.onclick = () => alert(errorMsg)
}
cover.title = gm.title || errorMsg
}
var createLocationchangeEvent = () => {
// 创建 locationchange 事件
// https://stackoverflow.com/a/52809105
if (!unsafeWindow._createLocationchangeEvent) {
history.pushState = (f => function pushState() {
var ret = f.apply(this, arguments)
window.dispatchEvent(new Event('pushstate'))
window.dispatchEvent(new Event('locationchange'))
return ret
})(history.pushState)
history.replaceState = (f => function replaceState() {
var ret = f.apply(this, arguments)
window.dispatchEvent(new Event('replacestate'))
window.dispatchEvent(new Event('locationchange'))
return ret
})(history.replaceState)
window.addEventListener('popstate', () => {
window.dispatchEvent(new Event('locationchange'))
})
unsafeWindow._createLocationchangeEvent = true
}
}
GM_addStyle(`
.${gm.id}_cover_btn {
cursor: pointer;
float: right;
margin-right: 1em;
font-size: 12px;
color: #757575;
}
.${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) {
var preview = document.body.appendChild(document.createElement('img'))
preview.className = `${gm.id}_preview`
var fadeTime = 200
var browserSyncTime = 10
var antiConflictTime = 20
var fadeIn = () => {
preview.style.display = 'unset'
setTimeout(() => {
preview.style.opacity = '1'
}, browserSyncTime)
}
var fadeOut = callback => {
preview.style.opacity = '0'
setTimeout(() => {
preview.style.display = 'none'
callback && callback()
}, fadeTime)
}
var disablePreviewTemp = () => {
target.disablePreview = true
setTimeout(() => {
if (!target.mouseOver) {
target.disablePreview = false
}
}, 80)
}
target.addEventListener('mouseenter', function() {
if (gm.enable.preview) {
this.mouseOver = true
if (this.disablePreview) {
return
}
setTimeout(() => {
preview.src && fadeIn()
}, antiConflictTime)
}
})
target.addEventListener('mouseleave', function() {
if (gm.enable.preview) {
this.mouseOver = false
if (this.disablePreview) {
this.disablePreview = false
return
}
setTimeout(() => {
preview.src && !preview.mouseOver && fadeOut()
}, antiConflictTime)
}
})
var startPos // 鼠标进入预览时的初始坐标
preview.onmouseenter = function() {
this.mouseOver = true
}
preview.onmouseleave = function() {
this.mouseOver = false
startPos = undefined
setTimeout(() => {
preview.src && fadeOut()
}, antiConflictTime)
}
preview.onclick = function() {
if (this.src) {
if (gm.enable.download) {
GM_download(this.src, document.title)
} else {
window.open(this.src)
}
fadeOut(disablePreviewTemp)
}
}
preview.addEventListener('wheel', function() {
// 滚动时关闭预览，优化用户体验
fadeOut(disablePreviewTemp)
})
preview.addEventListener('mousemove', function(e) {
// 鼠标移动一段距离关闭预览，优化用户体验
if (startPos) {
var dSquare = (startPos.x - e.clientX) ** 2 + (startPos.y - e.clientY) ** 2
if (dSquare > 20 ** 2) { // 20px
fadeOut(disablePreviewTemp)
}
} else {
startPos = {
x: e.clientX,
y: e.clientY,
}
}
})
GM_addStyle(`
.${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
}
/**
* 在条件满足后执行操作
*
* 当条件满足后，如果不存在终止条件，那么直接执行 `callback(result)`。
*
* 当条件满足后，如果存在终止条件，且 `stopTimeout` 大于 0，则还会在接下来的 `stopTimeout` 时间内判断是否满足终止条件，称为终止条件的二次判断。
* 如果在此期间，终止条件通过，则表示依然不满足条件，故执行 `onStop()` 而非 `callback(result)`。
* 如果在此期间，终止条件一直失败，则顺利通过检测，执行 `callback(result)`。
*
* @param {Object} options 选项
* @param {() => *} options.condition 条件，当 `condition()` 返回的 `result` 为真值时满足条件
* @param {(result) => void} [options.callback] 当满足条件时执行 `callback(result)`
* @param {number} [options.interval=100] 检测时间间隔（单位：ms）
* @param {number} [options.timeout=5000] 检测超时时间，检测时间超过该值时终止检测（单位：ms）
* @param {() => void} [options.onTimeout] 检测超时时执行 `onTimeout()`
* @param {() => *} [options.stopCondition] 终止条件，当 `stopCondition()` 返回的 `stopResult` 为真值时终止检测
* @param {() => void} [options.onStop] 终止条件达成时执行 `onStop()`（包括终止条件的二次判断达成）
* @param {number} [options.stopInterval=50] 终止条件二次判断期间的检测时间间隔（单位：ms）
* @param {number} [options.stopTimeout=0] 终止条件二次判断期间的检测超时时间（单位：ms）
* @param {number} [options.timePadding=0] 等待 `timePadding`ms 后才开始执行；包含在 `timeout` 中，因此不能大于 `timeout`
*/
function executeAfterConditionPassed(options) {
const defaultOptions = {
callback: result => console.log(result),
interval: 100,
timeout: 5000,
onTimeout: null,
stopCondition: null,
onStop: null,
stopInterval: 50,
stopTimeout: 0,
timePadding: 0,
}
options = {
...defaultOptions,
...options
}
let tid
let cnt = 0
const maxCnt = (options.timeout - options.timePadding) / options.interval
const task = () => {
const result = options.condition()
const stopResult = options.stopCondition && options.stopCondition()
if (stopResult) {
clearInterval(tid)
options.onStop && options.onStop.call(options)
} else if (++cnt > maxCnt) {
clearInterval(tid)
options.onTimeout && options.onTimeout.call(options)
} else if (result) {
clearInterval(tid)
if (options.stopCondition && options.stopTimeout > 0) {
this.executeAfterConditionPassed({
condition: options.stopCondition,
callback: options.onStop,
interval: options.stopInterval,
timeout: options.stopTimeout,
onTimeout: () => options.callback.call(options, result)
})
} else {
options.callback.call(options, result)
}
}
}
setTimeout(() => {
tid = setInterval(task, options.interval)
task()
}, options.timePadding)
}
})()