Add copy button to Gist files for easy code copying.
// ==UserScript==
// @name GitHub Gist Copier
// @description Add copy button to Gist files for easy code copying.
// @icon https://github.githubassets.com/favicons/favicon-dark.svg
// @version 1.3
// @author afkarxyz
// @namespace https://github.com/afkarxyz/userscripts/
// @supportURL https://github.com/afkarxyz/userscripts/issues
// @license MIT
// @run-at document-end
// @match https://gist.github.com/*
// @grant GM_xmlhttpRequest
// @grant GM_setClipboard
// @grant GM_addStyle
// @connect api.codetabs.com
// @connect api.cors.lol
// @connect api.allorigins.win
// @connect everyorigin.jwvbremen.nl
// @connect gist.githubusercontent.com
// ==/UserScript==
;(() => {
let isRequestInProgress = false
GM_addStyle(`
@keyframes spin {
0% { transform: rotate(0deg); }
100% { transform: rotate(360deg); }
}
.gist-copy-spinner {
animation: spin 0.75s linear infinite;
transform-origin: center;
}
`)
const proxyServices = [
{
name: "CodeTabs Proxy",
url: "https://api.codetabs.com/v1/proxy/?quest=",
},
{
name: "CORS.lol Proxy",
url: "https://api.cors.lol/?url=",
},
{
name: "AllOrigins Proxy",
url: "https://api.allorigins.win/get?url=",
parseResponse: (response) => {
const parsed = JSON.parse(response)
return parsed.contents
},
},
{
name: "EveryOrigin Proxy",
url: "https://everyorigin.jwvbremen.nl/api/get?url=",
parseResponse: (response) => {
const parsed = JSON.parse(response)
return parsed.html
},
},
]
function noop() {}
function debounce(f, delay) {
let timeoutId = null
return function (...args) {
if (timeoutId) {
clearTimeout(timeoutId)
}
timeoutId = setTimeout(() => {
f.apply(this, args)
}, delay)
}
}
async function fetchWithProxy(rawUrl, proxyIndex = 0) {
if (proxyIndex >= proxyServices.length) {
throw new Error("All proxies failed")
}
const proxyService = proxyServices[proxyIndex]
const proxiedUrl = `${proxyService.url}${encodeURIComponent(rawUrl)}`
return new Promise((resolve, reject) => {
GM_xmlhttpRequest({
method: "GET",
url: proxiedUrl,
headers: {
Accept: "text/plain, application/json, */*",
},
followRedirect: true,
onload: (response) => {
if (response.responseText.includes("limit") && response.responseText.includes("API")) {
fetchWithProxy(rawUrl, proxyIndex + 1)
.then(resolve)
.catch(reject)
return
}
if (response.status === 200) {
try {
let responseText = response.responseText
if (proxyService.parseResponse) {
responseText = proxyService.parseResponse(responseText)
}
if (responseText.includes("<a href=") && responseText.includes("Moved Permanently")) {
const match = responseText.match(/href="([^"]+)"/)
if (match && match[1]) {
const redirectUrl = match[1].startsWith("/") ? `${new URL(proxiedUrl).origin}${match[1]}` : match[1]
GM_xmlhttpRequest({
method: "GET",
url: redirectUrl,
headers: {
Accept: "text/plain, application/json, */*",
},
onload: (redirectResponse) => {
if (redirectResponse.status === 200) {
resolve(redirectResponse.responseText)
} else {
fetchWithProxy(rawUrl, proxyIndex + 1)
.then(resolve)
.catch(reject)
}
},
onerror: () => {
fetchWithProxy(rawUrl, proxyIndex + 1)
.then(resolve)
.catch(reject)
},
})
} else {
fetchWithProxy(rawUrl, proxyIndex + 1)
.then(resolve)
.catch(reject)
}
} else {
resolve(responseText)
}
} catch (e) {
fetchWithProxy(rawUrl, proxyIndex + 1)
.then(resolve)
.catch(reject)
}
} else {
fetchWithProxy(rawUrl, proxyIndex + 1)
.then(resolve)
.catch(reject)
}
},
onerror: () => {
fetchWithProxy(rawUrl, proxyIndex + 1)
.then(resolve)
.catch(reject)
},
})
})
}
function createCopyButton(fileElement) {
const fileActionElement = fileElement.querySelector(".file-actions")
if (!fileActionElement) {
return noop
}
const rawButton = fileActionElement.querySelector('a[href*="/raw/"]')
if (!rawButton) {
return noop
}
const button = document.createElement("button")
button.className = "btn-octicon gist-copy-button"
button.style.marginRight = "5px"
button.innerHTML = `
<svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-copy">
<path d="M0 6.75C0 5.784.784 5 1.75 5h1.5a.75.75 0 0 1 0 1.5h-1.5a.25.25 0 0 0-.25.25v7.5c0 .138.112.25.25.25h7.5a.25.25 0 0 0 .25-.25v-1.5a.75.75 0 0 1 1.5 0v1.5A1.75 1.75 0 0 1 9.25 16h-7.5A1.75 1.75 0 0 1 0 14.25Z"></path><path d="M5 1.75C5 .784 5.784 0 6.75 0h7.5C15.216 0 16 .784 16 1.75v7.5A1.75 1.75 0 0 1 14.25 11h-7.5A1.75 1.75 0 0 1 5 9.25Zm1.75-.25a.25.25 0 0 0-.25.25v7.5c0 .138.112.25.25.25h7.5a.25.25 0 0 0 .25-.25v-7.5a.25.25 0 0 0-.25-.25Z"></path>
</svg>
<svg style="display: none;" xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 24 24" class="gist-spinner">
<path fill="currentColor" d="M12,1A11,11,0,1,0,23,12,11,11,0,0,0,12,1Zm0,19a8,8,0,1,1,8-8A8,8,0,0,1,12,20Z" opacity="0.25"/>
<path fill="currentColor" d="M10.14,1.16a11,11,0,0,0-9,8.92A1.59,1.59,0,0,0,2.46,12,1.52,1.52,0,0,0,4.11,10.7a8,8,0,0,1,6.66-6.61A1.42,1.42,0,0,0,12,2.69h0A1.57,1.57,0,0,0,10.14,1.16Z" class="gist-copy-spinner"/>
</svg>
<svg style="display: none;" aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-check color-fg-success">
<path d="M13.78 4.22a.75.75 0 0 1 0 1.06l-7.25 7.25a.75.75 0 0 1-1.06 0L2.22 9.28a.751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018L6 10.94l6.72-6.72a.75.75 0 0 1 1.06 0Z"></path>
</svg>
`
const copyIcon = button.querySelector(".octicon-copy")
const spinnerIcon = button.querySelector(".gist-spinner")
const checkIcon = button.querySelector(".octicon-check")
let timeoutId = null
const copyHandler = async (e) => {
if (timeoutId || isRequestInProgress) {
return
}
e.preventDefault()
isRequestInProgress = true
copyIcon.style.display = "none"
spinnerIcon.style.display = "inline-block"
try {
const rawUrl = rawButton.href
const content = await fetchWithProxy(rawUrl)
GM_setClipboard(content, { type: "text", mimetype: "text/plain" })
spinnerIcon.style.display = "none"
checkIcon.style.display = "inline-block"
timeoutId = setTimeout(() => {
checkIcon.style.display = "none"
copyIcon.style.display = "inline-block"
timeoutId = null
}, 500)
} catch (error) {
spinnerIcon.style.display = "none"
copyIcon.style.display = "inline-block"
} finally {
isRequestInProgress = false
}
}
button.addEventListener("click", copyHandler)
fileActionElement.insertBefore(button, fileActionElement.firstChild)
return () => {
button.removeEventListener("click", copyHandler)
if (timeoutId) {
clearTimeout(timeoutId)
}
button.remove()
}
}
function runGistCopy() {
let removeAllListeners = noop
function tryCreateCopyButtons() {
removeAllListeners()
const fileElements = [...document.querySelectorAll(".file")]
const removeListeners = fileElements.map(createCopyButton)
removeAllListeners = () => {
removeListeners.map((f) => f())
;[...document.querySelectorAll(".gist-copy-button")].forEach((el) => {
el.remove()
})
}
}
setTimeout(tryCreateCopyButtons, 300)
const observer = new MutationObserver(
debounce(() => {
if (
document.querySelectorAll(".file").length > 0 &&
document.querySelectorAll(".gist-copy-button").length === 0
) {
tryCreateCopyButtons()
}
}, 100),
)
observer.observe(document.body, {
childList: true,
subtree: true,
})
if (window.onurlchange === null) {
window.addEventListener("urlchange", debounce(tryCreateCopyButtons, 16))
}
}
runGistCopy()
})()