Inline-expansion of :orig (full-resolution) twitter images
当前为
// ==UserScript==
// @name Twitter Inline Expansion
// @namespace https://github.com/an-electric-sheep/
// @description Inline-expansion of :orig (full-resolution) twitter images
// @match *://*.twitter.com/*
// @version 0.2.3
// @run-at document-start
// @noframes
// @grant unsafeWindow
// @grant GM_xmlhttpRequest
// ==/UserScript==
'use strict';
const cssPrefix = "mediatweaksuserscript";
// normal + mobile page
const TweetImageSelector = `
.tweet .js-adaptive-photo img ,
.Tweet .CroppedPhoto img
`;
const TweetVideoSelector = ".AdaptiveMedia-video iframe";
let alreadyVisited = new WeakSet();
function prefixed(str) {
return cssPrefix + str;
}
function mutationObserverCallback(mutations) {
setTimeout(() => {
try {
for(let mutation of mutations) {
if(mutation.type != "childList")
continue;
for(let node of [mutation.target, ...mutation.addedNodes]) {
if(node.nodeType != Node.ELEMENT_NODE)
continue;
onAddedNode(node)
for(let subNode of node.querySelectorAll(TweetVideoSelector))
onAddedNode(subNode);
for(let subNode of node.querySelectorAll(TweetImageSelector))
onAddedNode(subNode);
}
}
} catch(e) {
console.log(e)
}
}, 1)
}
function visitOnce(element, func) {
if(alreadyVisited.has(element))
return;
alreadyVisited.add(element);
func()
}
function onAddedNode(node) {
if(node.matches(TweetImageSelector)) {
visitOnce(node, () => {
addImageControls(node.closest(".tweet, .Tweet"),node);
})
}
if(node.matches(TweetVideoSelector)) {
// we match an iframe here. once on the parent because iframes get reloaded when scrolling
visitOnce(node.parentElement, () => {
addVideoControls(node.closest(".tweet"), node)
})
}
}
function controlContainer(target) {
let div = target.querySelector(`.${cssPrefix}-thumbs-container`);
if(!div) {
div = document.createElement("div")
target.appendChild(div)
div.className = prefixed("-thumbs-container")
}
return div;
}
function addImageControls(tweetContainer, image) {
let src = image.src;
let origSrc = src + ":orig"
let div = controlContainer(tweetContainer);
div.insertAdjacentHTML("beforeend", `
<a class="${cssPrefix}-orig-link" data-${cssPrefix}-small="${src}" href="${origSrc}"><img class="${cssPrefix}-thumb" src="${src}"></a>
`)
}
const supportedContentTypes = [
{
// https://twitter.com/age_jaco/status/623712731456122881/photo/1
matcher: (config) => config.content_type == "video/mp4",
ext: "mp4",
loader: fetchMP4
},
{
// https://twitter.com/MrNobre/status/754144048529625088
matcher: (config) => config.content_type == "application/x-mpegURL",
ext: "ts",
loader: fetchMpegTs
},{
// https://twitter.com/mkraju/status/755368535619145728
matcher: (config) => "vmap_url" in config,
ext: "mp4",
loader: fetchVmap
}
]
// can't use fetch() API here since it's blocked by CSP
function fetchVmap(configPromise) {
return configPromise.then(config => {
return new Promise((resolve, reject) => {
GM_xmlhttpRequest({
method: "GET",
url: config.vmap_url,
responseType: "xml",
anonymous: true,
onload: (rsp) => { resolve(rsp.responseXML) },
onerror: (e) => { reject(e) }
})
})
}).then(xmlDoc => {
let url = xmlDoc.querySelector("*|MediaFile").textContent;
return new Promise((resolve, reject) => {
GM_xmlhttpRequest({
method: "GET",
url: url,
responseType: "blob",
anonymous: true,
onload: (rsp) => { resolve(rsp.response) },
onerror: (e) => { reject(e) }
})
})
})
}
function fetchMpegTs(configPromise) {
let baseURL = null;
return configPromise.then(config => {
baseURL = config.video_url
return fetch(config.video_url, {redirect: "follow", mode: "cors"}).then((response) => {
return response.text()
})
}).then((playlist) => {
let highestResolution = playlist.split(/\n/).filter(str => !str.startsWith("#")).filter(str => str.length > 0).pop()
let fetchUrl = new URL(baseURL)
fetchUrl.pathname = highestResolution
return fetch(fetchUrl, {mode: "cors", redirects: "follow"});
}).then((response) => {
return response.text()
}).then((chunkList) => {
return chunkList.split(/\n/).filter(s => !s.startsWith("#")).filter(s => s.length > 0).map(chunk => {
let u = new URL(baseURL);
u.pathname = chunk;
return u;
})
}).then((urls) => {
return Promise.all(urls.map(u => {
return fetch(u.toString(), {mode: "cors", redirects: "follow"}).then(response => response.blob())
}));
}).then(blobs => {
return new Blob(blobs);
})
}
function fetchMP4(configPromise) {
return configPromise.then(config => {
return fetch(config.video_url, {redirect: "follow", mode: "cors"}).then(response => response.blob())
})
}
function addVideoControls(tweetContainer, iframe) {
let mediaConfig = null;
let configPromise = new Promise((resolve, reject) => {
if(iframe.contentDocument.readyState == "interactive" || iframe.contentDocument.readyState == "complete") {
resolve(iframe.contentDocument)
return;
}
iframe.addEventListener("load", () => resolve(iframe.contentDocument))
}).then((contentDoc) => {
let config = JSON.parse(contentDoc.querySelector(".player-container").dataset.config)
mediaConfig = config;
console.log(config)
if(!supportedContentTypes.find(t => t.matcher(config)))
throw new Error(`unknown video configuration, unable to fetch data`);
return config
})
const controls = controlContainer(tweetContainer)
controls.insertAdjacentHTML("beforeend", `
<a download="${Date.now()}.ts" href="#">download</a><span class="${cssPrefix}-progress"></span>
`)
let finalBlob = null;
const link = controls.querySelector("a[download]");
let exceptionHandler = (message) => {
return (exception) => {
controls.insertAdjacentHTML("beforeend", `
<span class="${cssPrefix}-error">
${message}:
${exception.toString()}
</span>
`)
}
}
configPromise.catch(exceptionHandler("An error occured while reading the video metadata"))
configPromise.then(config => {
const type = supportedContentTypes.find(t => t.matcher(config))
let filename = `@${config.user.screen_name} ${config.tweet_id}.${type.ext}`
link.download = filename;
link.appendChild(document.createTextNode(": " + filename))
})
link.addEventListener("click", (e) => {
if(finalBlob != null)
return;
e.preventDefault();
configPromise.then(config => {
const type = supportedContentTypes.find(t => t.matcher(config))
return type.loader(configPromise)
}).then(blob => {
finalBlob = blob;
link.href = URL.createObjectURL(finalBlob);
// fire new click event since we prevent-defaulted it earlier
link.click();
}).catch(exceptionHandler("An error occurred while downloading the video"))
})
}
let observer = null
function init() {
const config = { subtree: true, childList: true };
observer = new MutationObserver(mutationObserverCallback);
observer.observe(document.documentElement, config);
document.addEventListener("DOMContentLoaded", ready)
document.addEventListener("click", thumbToggle)
}
function thumbToggle(event) {
if(event.button != 0)
return;
let link = event.target.closest(`.${cssPrefix}-orig-link`);
if(!link)
return;
let img = link.querySelector("img");
event.preventDefault();
if(link.classList.contains(prefixed("-expanded"))) {
img.src = link.dataset[cssPrefix + "Small"]
img.classList.add(prefixed("-thumb"))
link.classList.remove(prefixed("-expanded"))
} else {
img.src = link.href;
let f = () => {
link.classList.add(prefixed("-expanded"))
img.classList.remove(prefixed("-thumb"))
img.removeEventListener("load", f)
}
img.addEventListener("load", f)
}
}
function ready() {
document.head.insertAdjacentHTML("beforeend", `
<style>
/* mobile */
section.Timeline {
overflow: visible;
}
.${cssPrefix}-thumbs-container {
display: flex;
flex-wrap: wrap;
justify-content: center;
}
a.${cssPrefix}-orig-link {
padding: 5px;
}
.${cssPrefix}-orig-link img.${cssPrefix}-thumb {
max-width: 60px;
max-height: 60px;
vertical-align: middle;
}
a.${cssPrefix}-expanded {
width: -moz-fit-content;
width: fit-content;
}
a.${cssPrefix}-expanded img {
width: -moz-fit-content;
width: fit-content;
max-width: 95vw;
}
</style>
`)
}
init();