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Inline embed for youtube links in reddit-stream.com
// ==UserScript==
// @name reddit-stream youtube
// @description Inline embed for youtube links in reddit-stream.com
// @namespace org.stevenhoward
// @include http://reddit-stream.com/*
// @version 1
// @grant none
// ==/UserScript==
function createYoutubeEmbed (link) {
let match = /.*[/]watch\?v=(.*)/.exec(link.href);
let frame = document.createElement('iframe');
if (match && match.length && match.length == 2) {
frame.width = 640;
frame.height = 390;
frame.frameBorder = 0;
frame.style.display = 'block';
frame.src = `https://www.youtube.com/embed/${match[1]}?autoplay=1`;
}
/* Return an empty iframe for malformed urls. Don't care about errors for now. */
return frame;
}
function addVideoExpando (link) {
let toggle = document.createElement('a');
toggle.href = 'javascript: void(0)';
toggle.innerHTML = ' (+)';
toggle.style.opacity = 0.5;
toggle.addEventListener('click', function () {
let existingFrame = link.parentNode.querySelector('iframe');
if (existingFrame) {
existingFrame.remove();
toggle.innerHTML = ' (+)';
}
else {
let frame = createYoutubeEmbed(link);
toggle.parentNode.insertBefore(frame, toggle.nextSibling);
toggle.innerHTML = ' (-)';
}
});
link.parentNode.insertBefore(toggle, link.nextSibling);
}
new MutationObserver(function (mutations) {
for (let mutation of mutations) {
for (let node of mutation.addedNodes) {
if (node.nodeType == Node.ELEMENT_NODE) {
for (let video of node.querySelectorAll('a[href*="youtube.com"]')) {
addVideoExpando(video);
}
}
}
}
}).observe(document.getElementById('c-main'), {
childList: true,
subtree: true
});
for (let video of document.querySelectorAll('#c-main a[href*="youtube.com"]')) {
addVideoExpando(video);
}