// ==UserScript==
// @name        Display Original Image
// @version     0.1.2
// @namespace   eight04.blogspot.com
// @description This script will replace thumbnail with full size image if available.
// @include     http*
// @grant       none
// ==/UserScript==
"use strict";
function observeDocument(callback) {
callback(document.body);
new MutationObserver(function(mutations){
var i;
for (i = 0; i < mutations.length; i++) {
if (!mutations[i].addedNodes.length) {
continue;
}
callback(mutations[i].target);
}
}).observe(document.body, {
childList: true,
subtree: true
});
}
function displayOriginalImage(node) {
var imgs = node.querySelectorAll("a[href]>img[src]");
var i;
for (i = 0; i < imgs.length; i++) {
replace(imgs[i], imgs[i].parentNode);
}
}
function handleError() {
this.src = this.oldSrc;
this.removeEventListener(handleError);
this.classList.add("display-original-image-failed");
}
function replace(img, anchor) {
if (anchor.classList.contains("display-original-image")) {
return;
}
if (!/\.(jpg|png|gif)($|\?)/i.test(anchor.href)) {
return;
}
img.addEventListener("error", handleError);
img.oldSrc = img.src;
img.src = anchor.href;
anchor.classList.add("display-original-image");
}
observeDocument(displayOriginalImage);