Google No Redirects

Removes Google redirects.
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// ==UserScript==
// @name         Google No Redirects
// @namespace    https://greasyfork.org/zh-CN/scripts/23721-google-no-redirects
// @version      1.1
// @description  Removes Google redirects. 
// @include      /^https?\:\/\/(www|news|maps|docs|cse|encrypted)\.google\./
// @author       liliang13
// @license      GPL version 2 or any later version; http://www.gnu.org/licenses/gpl-2.0.txt
// @require      http://cdnjs.cloudflare.com/ajax/libs/jquery/1.8.3/jquery.min.js
// @grant        GM_addStyle
// @run-at       document-end
// ==/UserScript==

var hostname = location.hostname
var pathname = location.pathname
var href = location.href

String.prototype.contains = function(s) {
	return -1 !== this.indexOf(s)
}

String.prototype.startsWith = function(s) {
	return this.slice(0, s.length) == s
}

function stopBubbling(event) {
	event.stopPropagation()
}

function blockListeners(element, events) {
	if(!(element instanceof EventTarget && typeof events === 'string')) {
		return
	}
	var eventList = events.split(/\W+/) || []
	for(var i = 0, event; event = eventList[i]; i++) {
		//removeEventListener is not needed as duplicate listeners would be discarded
		element.addEventListener(event, stopBubbling, true)
	}
}

function modifyGoogle() {
	//remove web/video search redirects
	$('a[onmousedown^="return rwt("]').removeAttr('onmousedown')
	//remove web/video safe-browsing redirects
	$('a[href^="/interstitial?"]').each(function() {
		var m = $(this).attr('href').match(/(?:\?|\&)url\=([^\&]+)/i)
		if(m && m[1]) {
			this.href = decodeURIComponent(m[1])
			//warning prefix
			if(!$(this).index()) {
			    $('<span title="Unsafe">&#9888</span>').insertBefore(this)
			}
		}
	})
	//remove custom search redirects
	$('.gsc-results a[href][data-cturl]').each(function() {
		blockListeners(this, 'mousedown')
	})
	//remove image search redirects
	$('a').filter('[class^="irc_"], [class*=" irc_"], [id^="irc_"]').each(function() {
		blockListeners(this, 'mousedown')
	})
	//remove news search redirects
	if(href.contains('tbm=nws') || hostname.startsWith('news.google.')) {
		$('a.article[href^="http"]').each(function() {
			blockListeners(this, 'click contextmenu mousedown mousemove')
		})
	}
	//remove shopping search redirects
	else if(href.contains('tbm=shop') || pathname.startsWith('/shopping/')) {
		$('a').filter('[href*="/aclk?"], [href*="/url?"]').each(function() {
			var m = this.href.match(/(?:\&adurl|\?q|\&url)\=(http.*?)(\&|$)/i)
			if(m && m[1]) {
				var link = decodeURIComponent(m[1])
				link = link.replace
				(/\=http(\%3A|\:)(\%2F|\/){2}.*(?=\=https?(\%3A|\:)(\%2F|\/){2})/i, '')
				m = link.match(/\=(https?(\%3A|\:)(\%2F|\/){2}.*?)(\&|$)/i)
				if(m && m[1]) {
					link = decodeURIComponent(m[1])
				}
				this.href = link
			}
		})
	}
	//remove map search redirects; does not remove redirects of advertisement
	else if(pathname.startsWith('/maps/') || '/maps' == pathname) {
		$('a[href^="http"]').each(function() {
			blockListeners(this, 'click contextmenu')
			//legacy
			if(this.href.contains('url?')) {
				var m = this.href.match(/(?:\&|\?)q\=(http.*?)(\&|$)/i)
				if(m && m[1]) {
					this.href = decodeURIComponent(m[1])
				}
			}
		})
	}
	//remove legacy search redirects and docs redirects
	//should be done last as shopping uses the same url pattern
	$('a[href*="/url?"]').each(function() {
		var m = this.href.match(/\/url\?(?:url|q)\=(http.*?)(\&|$)/i)
		if(m && m[1]) {
			this.href = decodeURIComponent(m[1])
		}
	})
}

MutationObserver = window.MutationObserver || window.WebKitMutationObserver
if(MutationObserver) {
	var observer = new MutationObserver(function(mutations) {
		modifyGoogle()
	})
	//tiny delay needed for firefox
	setTimeout(function() {
		observer.observe(document.body, {
			childList: true, 
			subtree: true
		})
		modifyGoogle()
	}, 100)
}
//for chrome v18-, firefox v14-, internet explorer v11-, opera v15- and safari v6-
else {
	setInterval(function() {
		modifyGoogle()
	}, 500)
}