// ==UserScript==
// @name            rBlock
// @author          nonoroazoro
// @description     移除一些网站用于数据统计的链接跳转，加快网站访问速度。
// @description:en  Removes redirects of web sites.
// @homepageURL     https://github.com/nonoroazoro/firefox/tree/master/greasemonkey/rBlock
// @namespace       https://greasyfork.org/zh-CN/scripts/20568-rblock
// @grant           none
// @version         1.3.8
// @run-at          document-end
// @include         /^https?:\/\/(.+\.)?google\./
// @include         /^https?:\/\/(.+\.)?zhihu\./
// @include         https://forum.gamer.com.tw/*
// ==/UserScript==
const rBlock = {
_blockers: [],
start()
{
this.init();
for (const blocker of this._blockers)
{
blocker.start();
}
},
init()
{
this._blockers = [];
const _host = window.location.host;
// 1. google
if (/^(.+\.)?google\./.test(_host))
{
this._blockers.push({
start()
{
// 1. for static pages.
// when google instant predictions is disabled,
// this blocker will only be called once.
this._block();
// 2. for dynamic pages.
// when google instant predictions is enabled,
// this blocker will be call whenever the current page is updated.
_observe(this._block);
},
// block redirects of google
_block()
{
// 1. general
let elems = document.querySelectorAll(`a[href*="url="]`);
revealURL(elems, /.*url=(http[^&]+)/i);
// 2. images
elems = document.querySelectorAll(`a[jsaction][href]:not([href="javascript:void(0)"]):not(.rg_l)`);
_removeAttributes(elems, "jsaction");
// 3. all/videos/news/apps
elems = document.querySelectorAll(`a[onmousedown^="return rwt("]`);
_removeAttributes(elems, "onmousedown");
// 4. cached links
elems = document.querySelectorAll(`a[href^="http://webcache.googleusercontent."], a[href^="https://webcache.googleusercontent."]`);
const targets = document.querySelectorAll(`a.rblock-cached-link`);
if (elems.length !== targets.length * 2)
{
// prevent duplication
let menuLink;
let cacheLink;
for (const elem of elems)
{
elem.style.display = "inline";
menuLink = elem.closest("div.action-menu.ab_ctl");
cacheLink = document.createElement("a");
cacheLink.setAttribute("href", elem.getAttribute("href").replace(/^http:/, "https:"));
cacheLink.setAttribute("class", "rblock-cached-link");
cacheLink.target = "_blank";
cacheLink.innerText = " Cached ";
menuLink.parentNode.insertBefore(cacheLink, menuLink);
}
}
}
});
}
// 2. zhihu
if (/^(.+\.)?zhihu\./.test(_host))
{
this._blockers.push({
start()
{
this._block();
_observe(this._block);
},
_block()
{
// 1. general
revealURL(
document.querySelectorAll(`a[href*="?target="]`),
/.*target=(http[^&]+)/i
);
// 2. open in new tab
for (const elem of document.querySelectorAll(`a.internal`))
{
_openInNewTab(elem);
}
}
});
}
// 3. 巴哈姆特
if (_host === "forum.gamer.com.tw")
{
this._blockers.push({
start()
{
this._block();
_observe(this._block);
},
_block()
{
// 1. general
revealURL(
document.querySelectorAll(`a[href*="?url="]`),
/.*url=(http.+)/i
);
}
});
}
}
};
function _observe(p_callback)
{
if (typeof p_callback === "function" && document.body)
{
(new window.MutationObserver(debounce(p_callback))).observe(document.body, { childList: true, subtree: true });
}
}
function _removeAttributes(p_elements, p_attributes)
{
if (p_elements && typeof p_attributes === "string")
{
const attributes = p_attributes.split(/\W+/) || [];
for (const elem of p_elements)
{
for (const attr of attributes)
{
elem.removeAttribute(attr);
}
}
}
}
/* eslint no-unused-vars: "off" */
function _removeListeners(p_element, p_events)
{
if (p_element && typeof p_events === "string")
{
const events = p_events.split(/\W+/) || [];
for (const event of events)
{
p_element.removeEventListener(event, _preventDefaultAction, true);
p_element.addEventListener(event, _preventDefaultAction, true);
}
}
}
function _preventDefaultAction(e)
{
e.stopPropagation();
}
function revealURL(p_elems, p_regex)
{
if (p_elems && p_regex)
{
let groups;
for (const elem of p_elems)
{
// reveal url & open in new tab
groups = decodeURIComponent(elem.getAttribute("href")).match(p_regex);
if (groups && groups[1])
{
elem.setAttribute("href", groups[1]);
_openInNewTab(elem);
}
}
}
}
function _openInNewTab(p_elem)
{
if (p_elem)
{
p_elem.target = "_blank";
}
}
function debounce(p_callback, p_delay = 500)
{
let timer = null;
return function _inner(...args)
{
const context = this;
window.clearTimeout(timer);
timer = window.setTimeout(() =>
{
p_callback.apply(context, args);
}, p_delay);
};
}
function throttle(p_callback, p_threshhold = 500, p_scope)
{
let last;
let timer;
return function _inner(...args)
{
const now = +new Date();
const context = p_scope || this;
if (last && now < last + p_threshhold)
{
window.clearTimeout(timer);
timer = window.setTimeout(() =>
{
last = now;
p_callback.apply(context, args);
}, p_threshhold);
}
else
{
last = now;
p_callback.apply(context, args);
}
};
}
rBlock.start();