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Wrap injected JS in IIFE to prevent scope conflicts

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This commit is contained in:
Max Goodhart
2020-07-23 19:51:46 -07:00
parent b8109735fa
commit 36fe472fdc
1 changed files with 108 additions and 106 deletions
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214
src/node/viewStateMachine.js
View File

@@ -221,121 +221,123 @@ const viewStateMachine = Machine(
}
const wc = view.webContents
const info = await wc.executeJavaScript(`
const sleep = ms => new Promise((resolve) => setTimeout(resolve, ms))
(function() {
const sleep = ms => new Promise((resolve) => setTimeout(resolve, ms))
async function waitForVideo() {
let tries = 0
let video
while ((!video || !video.src) && tries < 10) {
video = document.querySelector('video')
tries++
await sleep(200)
}
if (video) {
return {video}
}
tries = 0
let iframe
while ((!video || !video.src) && tries < 10) {
for (iframe of document.querySelectorAll('iframe')) {
if (!iframe.contentDocument) {
continue
}
video = iframe.contentDocument.querySelector('video')
if (video) {
break
}
async function waitForVideo() {
let tries = 0
let video
while ((!video || !video.src) && tries < 10) {
video = document.querySelector('video')
tries++
await sleep(200)
}
tries++
await sleep(200)
}
if (video) {
return { video, iframe }
}
return {}
}
const periscopeHacks = {
isMatch() {
return location.host === 'www.pscp.tv' || location.host === 'www.periscope.tv'
},
onLoad() {
const playButton = document.querySelector('.PlayButton')
if (playButton) {
playButton.click()
}
},
afterPlay(video) {
const baseVideoEl = document.querySelector('div.BaseVideo')
if (!baseVideoEl) {
return
if (video) {
return {video}
}
function positionPeriscopeVideo() {
// Periscope videos can be rotated using transform matrix. They need to be rotated correctly.
const tr = baseVideoEl.style.transform
if (tr.endsWith('matrix(0, 1, -1, 0, 0, 0)')) {
video.className = '__rot90__'
} else if (tr.endsWith('matrix(-1, 0, 0, -1, 0)')) {
video.className = '__rot180__'
} else if (tr.endsWith('matrix(0, -1, 1, 0, 0, 0)')) {
video.className = '__rot270__'
}
}
positionPeriscopeVideo()
const obs = new MutationObserver(ml => {
for (const m of ml) {
if (m.attributeName === 'style') {
positionPeriscopeVideo()
return
tries = 0
let iframe
while ((!video || !video.src) && tries < 10) {
for (iframe of document.querySelectorAll('iframe')) {
if (!iframe.contentDocument) {
continue
}
video = iframe.contentDocument.querySelector('video')
if (video) {
break
}
}
})
obs.observe(baseVideoEl, {attributes: true})
},
}
async function findVideo() {
if (periscopeHacks.isMatch()) {
periscopeHacks.onLoad()
}
const { video, iframe } = await waitForVideo()
if (!video) {
throw new Error('could not find video')
}
if (iframe) {
const style = iframe.contentDocument.createElement('style')
style.innerHTML = \`${VIDEO_OVERRIDE_STYLE}\`
iframe.contentDocument.head.appendChild(style)
iframe.className = '__video__'
let parentEl = iframe.parentElement
while (parentEl) {
parentEl.className = '__video_parent__'
parentEl = parentEl.parentElement
tries++
await sleep(200)
}
iframe.contentDocument.body.appendChild(video)
} else {
document.body.appendChild(video)
}
video.muted = false
video.autoPlay = true
video.play()
setInterval(() => video.play(), 1000)
// Prevent sites from re-muting the video (Periscope, I'm looking at you!)
Object.defineProperty(video, 'muted', {writable: true, value: false})
if (periscopeHacks.isMatch()) {
periscopeHacks.afterPlay(video)
if (video) {
return { video, iframe }
}
return {}
}
const info = { title: document.title }
return info
}
findVideo()
const periscopeHacks = {
isMatch() {
return location.host === 'www.pscp.tv' || location.host === 'www.periscope.tv'
},
onLoad() {
const playButton = document.querySelector('.PlayButton')
if (playButton) {
playButton.click()
}
},
afterPlay(video) {
const baseVideoEl = document.querySelector('div.BaseVideo')
if (!baseVideoEl) {
return
}
function positionPeriscopeVideo() {
// Periscope videos can be rotated using transform matrix. They need to be rotated correctly.
const tr = baseVideoEl.style.transform
if (tr.endsWith('matrix(0, 1, -1, 0, 0, 0)')) {
video.className = '__rot90__'
} else if (tr.endsWith('matrix(-1, 0, 0, -1, 0)')) {
video.className = '__rot180__'
} else if (tr.endsWith('matrix(0, -1, 1, 0, 0, 0)')) {
video.className = '__rot270__'
}
}
positionPeriscopeVideo()
const obs = new MutationObserver(ml => {
for (const m of ml) {
if (m.attributeName === 'style') {
positionPeriscopeVideo()
return
}
}
})
obs.observe(baseVideoEl, {attributes: true})
},
}
async function findVideo() {
if (periscopeHacks.isMatch()) {
periscopeHacks.onLoad()
}
const { video, iframe } = await waitForVideo()
if (!video) {
throw new Error('could not find video')
}
if (iframe) {
const style = iframe.contentDocument.createElement('style')
style.innerHTML = \`${VIDEO_OVERRIDE_STYLE}\`
iframe.contentDocument.head.appendChild(style)
iframe.className = '__video__'
let parentEl = iframe.parentElement
while (parentEl) {
parentEl.className = '__video_parent__'
parentEl = parentEl.parentElement
}
iframe.contentDocument.body.appendChild(video)
} else {
document.body.appendChild(video)
}
video.muted = false
video.autoPlay = true
video.play()
setInterval(() => video.play(), 1000)
// Prevent sites from re-muting the video (Periscope, I'm looking at you!)
Object.defineProperty(video, 'muted', {writable: true, value: false})
if (periscopeHacks.isMatch()) {
periscopeHacks.afterPlay(video)
}
const info = { title: document.title }
return info
}
findVideo()
}())
`)
return info
},