Replaces images from certain websites with a proxied version.
// ==UserScript==
// @name Image Proxier
// @namespace https://github.com/GrumpyCrouton/Userscripts
// @version 1.0
// @description Replaces images from certain websites with a proxied version.
// @author GrumpyCrouton
// @match *://*/*
// @grant none
// ==/UserScript==
(function() {
'use strict';
var replace_from = [
'stack.imgur.com',
'i.stack.imgur.com',
'graph.facebook.com',
];
var proxy_link = "//grumpycrouton.com/other/image_proxy/?url=";
var $ = window.jQuery;
$(function() {
//runProxier();
});
function runProxier() {
$('img').each(function() {
var image = $(this);
if(!image.data('image_proxier_converted')) {
image.attr('src', getProxyLink(image.attr('src')));
image.attr('data-image_proxier_converted', 1);
}
});
$('a').each(function() {
var link = $(this);
if(!link.data('image_proxier_converted')) {
link.attr('href', getProxyLink(link.attr('href')));
link.attr('data-image_proxier_converted', 1);
}
});
}
function getProxyLink(givenLink) {
if (givenLink) {
if (replace_from.some(function(v) {
return givenLink.indexOf(v) >= 0;
})) {
var new_link = proxy_link + encodeURIComponent(givenLink);
console.log(new_link);
return new_link;
} else {
return givenLink;
}
}
}
(function(window) {
var last = +new Date();
var delay = 100; // default delay
// Manage event queue
var stack = [];
function callback() {
var now = +new Date();
if (now - last > delay) {
for (var i = 0; i < stack.length; i++) {
stack[i]();
}
last = now;
}
}
// Public interface
var onDomChange = function(fn, newdelay) {
if (newdelay) delay = newdelay;
stack.push(fn);
};
// Naive approach for compatibility
function naive() {
var last = document.getElementsByTagName('*');
var lastlen = last.length;
var timer = setTimeout(function check() {
// get current state of the document
var current = document.getElementsByTagName('*');
var len = current.length;
// if the length is different
// it's fairly obvious
if (len != lastlen) {
// just make sure the loop finishes early
last = [];
}
// go check every element in order
for (var i = 0; i < len; i++) {
if (current[i] !== last[i]) {
callback();
last = current;
lastlen = len;
break;
}
}
// over, and over, and over again
setTimeout(check, delay);
}, delay);
}
//
// Check for mutation events support
//
var support = {};
var el = document.documentElement;
var remain = 3;
// callback for the tests
function decide() {
if (support.DOMNodeInserted) {
window.addEventListener("DOMContentLoaded", function() {
if (support.DOMSubtreeModified) { // for FF 3+, Chrome
el.addEventListener('DOMSubtreeModified', callback, false);
} else { // for FF 2, Safari, Opera 9.6+
el.addEventListener('DOMNodeInserted', callback, false);
el.addEventListener('DOMNodeRemoved', callback, false);
}
}, false);
} else if (document.onpropertychange) { // for IE 5.5+
document.onpropertychange = callback;
} else { // fallback
naive();
}
}
// checks a particular event
function test(event) {
el.addEventListener(event, function fn() {
support[event] = true;
el.removeEventListener(event, fn, false);
if (--remain === 0) decide();
}, false);
}
// attach test events
if (window.addEventListener) {
test('DOMSubtreeModified');
test('DOMNodeInserted');
test('DOMNodeRemoved');
} else {
decide();
}
// do the dummy test
var dummy = document.createElement("div");
el.appendChild(dummy);
el.removeChild(dummy);
// expose
window.onDomChange = onDomChange;
})(window);
onDomChange(function() {
runProxier();
});
})();