// ==UserScript==
// @name        Imgur RSS gif -> mp4
// @namespace   kapela86
// @include     http://www.inoreader.com*
// @version     1
// @grant       none
// ==/UserScript==
//var target = document.querySelector('');

var CallbackReaderPane = function(callback)
{
    for (var i = 0; i < callback.length; i++)
    {
        if (callback[i].addedNodes.length > 0)
        {
            var ListaNode = callback[i].addedNodes;
            for (var j = 0; j < ListaNode.length; j++)
            {
                if (ListaNode[j].tagName === "DIV" && ListaNode[j].id.slice(0,23) === "article_contents_inner_")
                {
                    var Image = ListaNode[j].querySelector('img[src^="http://i.imgur.com/"]');
                    if (Image !== null && Image.src.slice(-4) === ".gif")
                    {
                        var Nazwa = Image.src.slice(Image.src.lastIndexOf("/")+1,Image.src.lastIndexOf("."));
                        Image.parentNode.outerHTML = '<video preload="auto" controls="true" autoplay="autoplay" muted="muted" loop="loop"><source src="//i.imgur.com/' + Nazwa + '.mp4" type="video/mp4"></video>';
                    }
                }
            }
        }
    }
}

var ObserverReaderPane = new MutationObserver(CallbackReaderPane);
ObserverReaderPane.observe(document.querySelector("div#reader_pane"), {childList: true, subtree: true});