RU AdList JS Fixes

try to take over the world!
当前为 2017-07-17 提交的版本，查看最新版本。
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// ==UserScript==
// @name         RU AdList JS Fixes
// @namespace    ruadlist_js_fixes
// @version      20170717.4
// @description  try to take over the world!
// @author       lainverse & dimisa
// @match        *://*/*
// @grant        unsafeWindow
// @grant        window.clo1se
// @grant        GM_getValue
// @grant        GM_setValue
// @grant        GM_deleteValue
// @run-at       document-start
// ==/UserScript==
 
(function() {
    'use strict';
    let win = (unsafeWindow || window),
        // http://stackoverflow.com/questions/9847580/how-to-detect-safari-chrome-ie-firefox-and-opera-browser
        isOpera = (!!window.opr && !!opr.addons) || !!window.opera || navigator.userAgent.indexOf(' OPR/') >= 0,
        isChrome = !!window.chrome && !!window.chrome.webstore,
        isSafari = (Object.prototype.toString.call(window.HTMLElement).indexOf('Constructor') > 0 ||
                    (function (p) { return p.toString() === "[object SafariRemoteNotification]"; })(!window.safari || safari.pushNotification)),
        isFirefox = typeof InstallTrigger !== 'undefined',
        inIFrame = (win.self !== win.top),
        _getAttribute = Element.prototype.getAttribute,
        _setAttribute = Element.prototype.setAttribute,
        _de = document.documentElement,
        _appendChild = Document.prototype.appendChild.bind(_de),
        _removeChild = Document.prototype.removeChild.bind(_de),
        _createElement = Document.prototype.createElement.bind(document);
 
    // NodeList iterator polyfill (mostly for Safari)
    // https://jakearchibald.com/2014/iterators-gonna-iterate/
    if (!NodeList.prototype[Symbol.iterator]) {
        NodeList.prototype[Symbol.iterator] = Array.prototype[Symbol.iterator];
    }
 
    // Options
    let opts = {
        'useWSIFunc': useWSI
    };
 
    {
        let optsCall = function(callback)
        {
            // Register event listener
            let key = "optsCallEvent_" + Math.random().toString(36).substr(2),
                cb = callback.func.bind(callback.name);
            window.addEventListener(key, cb, false);
            // Generate and dispatch synthetic event
            let ev = document.createEvent("HTMLEvents");
            ev.initEvent(key, true, false);
            window.dispatchEvent(ev);
            // Remove listener
            window.removeEventListener(key, cb, false);
        };
 
        let initOptsHandler = function()
        {
            /*jshint validthis:true */
            opts[this] = GM_getValue(this, true);
            if (opts[this])
                opts[this+'Func']();
        };
 
        optsCall({
            func: initOptsHandler,
            name: 'useWSI'
        });
 
        // show options page
        let openOptions = function()
        {
            let ovl = _createElement('div'),
                inner = _createElement('div');
            ovl.style = (
                'position: fixed;'+
                'top:0; left:0;'+
                'bottom: 0; right: 0;'+
                'background: rgba(0,0,0,0.85);'+
                'z-index: 2147483647;'+
                'padding: 5em'
            );
            inner.style = (
                'background: whitesmoke;'+
                'font-size: 10pt;'+
                'color: black;'+
                'padding: 1em'
            );
            inner.textContent = 'JS Fixes Options: (reload page to apply)';
            inner.appendChild(_createElement('br'));
            inner.appendChild(_createElement('br'));
            ovl.addEventListener(
                'click', function(e)
                {
                    if (e.target === ovl) {
                        ovl.parentNode.removeChild(ovl);
                        e.preventDefault();
                    }
                    e.stopPropagation();
                }, false
            );
            // append checkbox with label function
            function addCheckbox(optName, optLabel)
            {
                let c = _createElement('input'),
                    l = _createElement('label');
                c.type = 'checkbox';
                c.id = optName;
                optsCall({
                    func: function()
                    {
                        c.checked = GM_getValue(this);
                    },
                    name: optName
                });
                c.addEventListener(
                    'click', function(e)
                    {
                        optsCall({
                            func:function(){
                                GM_setValue(this, e.target.checked);
                                opts[this] = e.target.checked;
                            },
                            name:optName
                        });
                    }, true
                );
                l.textContent = optLabel;
                l.setAttribute('for', optName);
                inner.appendChild(c);
                inner.appendChild(l);
                inner.appendChild(_createElement('br'));
            }
            // append checkboxes
            addCheckbox('useWSI', 'Use WebSocket filter. Disable if experience problems with WebSocket connections.');
            document.body.appendChild(ovl);
            ovl.appendChild(inner);
        };
 
        // monitor keys pressed for Ctrl+Alt+Shift+J > s > f code
        let opPos = 0, opKey = ['KeyJ','KeyS','KeyF'];
        document.addEventListener(
            'keydown', function(e)
            {
                if ((e.code === opKey[opPos] || e.location) &&
                    (!!opPos || e.altKey && e.ctrlKey && e.shiftKey))
                {
                    opPos += e.location ? 0 : 1;
                    e.stopPropagation();
                    e.preventDefault();
                } else {
                    opPos = 0;
                }
                if (opPos === opKey.length)
                {
                    opPos = 0;
                    openOptions();
                }
            }, false
        );
    }
 
    // Special wrapper script to run scripts designed to override standard DOM functions
    // In Firefox appends supplied script to a page to make it run in page context and let
    // page content access overridden functions. In other browsers just run it as-is.
    function scriptLander(func, prepend)
    {
        if (!isFirefox)
        {
            func();
            return;
        }
        let script = _createElement('script');
        script.textContent = '(function(){let win=window;' + (
            prepend && prepend.join('') || ''
        ) + '!' + func + '();})();';
        _appendChild(script);
        _removeChild(script);
    }
 
    // Fake objects of advertisement networks to break their workflow
    scriptLander(
        function()
        {
            if (/^([^.]+\.)*?(yandex|google)\./i.test(window.location.host))
                return; // Google likes to define odd global variables like Ya
            // Also, Yandex uses their Ya object for a lot of things on their pages and
            // wrapping it may cause problems, so it's better to leave it as-is there.
 
            let _define = function(obj, prop, val)
            {
                Object.defineProperty(
                    obj, prop, {
                        get: ()  => val,
                        set: (v) => v,
                        enumerable: true
                    }
                );
            };
            let _proxy = function(obj)
            {
                return new Proxy(
                    obj, {
                        get: (t, p) => t[p],
                        set: (t, p, v) => v
                    }
                );
            };
            let nullfunc = () => null;
 
            // Yandex.Direct
            let Ya = {};
            _define(Ya, 'adfoxCode', _proxy({
                create: nullfunc,
                createScroll: nullfunc
            }));
            _define(Ya, 'Context', _proxy({
                _callbacks: { push: nullfunc }
            }));
            _define(Ya, 'Metrika', function(){
                for (let name of ['reachGoal', 'replacePhones', 'trackLinks', 'hit', 'params'])
                    this[name] = nullfunc;
            });
            _define(Ya, '_metrika', _proxy({
                counter: new Ya.Metrika(),
                counters: {},
                hitParam: {},
                counterNum: 0,
                hitId: 0,
                v: 1
            }));
            _define(Ya, '_globalMetrikaHitId', 0);
            _define(win, 'Ya', Ya);
 
            // Rambler AdfProxy
            let Adf = {};
            _define(Adf, 'banner', _proxy({
                sspScroll: nullfunc,
                ssp: nullfunc
            }));
            _define(win, 'Adf', Adf);
        }
    );
 
    // Creates and return protected style (unless protection is manually disabled).
    // Protected style will re-add itself on removal and remaind enabled on attempt to disable it.
    function createStyle(rules, props, skip_protect)
    {
        props = props || {};
        props.type = 'text/css';
 
        function _protect(style)
        {
            if (skip_protect)
                return;
 
            Object.defineProperty(style, 'sheet', {
                value: null,
                enumerable: true
            });
            Object.defineProperty(style, 'disabled', {
                get: () => true, //pretend to be disabled
                set: () => null,
                enumerable: true
            });
            (new MutationObserver(
                (ms) => _removeChild(ms[0].target)
            )).observe(style, { childList: true });
        }
 
 
        function _create()
        {
            let style = _appendChild(_createElement('style'));
            Object.assign(style, props);
 
            function insertRules(rule)
            {
                if (rule.forEach)
                    rule.forEach(insertRules);
                else try {
                    style.sheet.insertRule(rule, 0);
                } catch (e) {
                    console.error(e);
                }
            }
 
            insertRules(rules);
            _protect(style);
 
            return style;
        }
 
        let style = _create();
        if (skip_protect)
            return style;
 
        function resolveInANewContext(resolve)
        {
            setTimeout(
                (resolve) => resolve(_create()),
                0, resolve
            );
        }
 
        (new MutationObserver(
            function(ms)
            {
                let m, node;
                for (m of ms) for (node of m.removedNodes)
                    if (node === style)
                        (new Promise(resolveInANewContext))
                        .then((st) => (style = st));
            }
        )).observe(_de, { childList: true });
 
        return style;
    }
 
    // https://greasyfork.org/scripts/19144-websuckit/
    function useWSI()
    {
        // check does browser support Proxy and WebSocket
        if (typeof Proxy !== 'function' ||
            typeof WebSocket !== 'function')
            return;
 
        function getWrappedCode(removeSelf)
        {
            let text = getWrappedCode.toString() + WSI.toString();
            text = (
                '(function(){"use strict";'+
                text.replace(/\/\/[^\r\n]*/g,'').replace(/[\s\r\n]+/g,' ')+
                '(new WSI(self||window)).init();'+
                (removeSelf?'let s = document.currentScript; if (s) {s.parentNode.removeChild(s);}':'')+
                '})();\n'
            );
            return text;
        }
 
        function WSI(win, safeWin)
        {
            safeWin = safeWin || win;
            let masks = [], filter;
            for (filter of [// blacklist
                '||185.87.50.147^',
                '||10root25.website^', '||24video.xxx^',
                '||adlabs.ru^', '||adspayformymortgage.win^', '||aviabay.ru^',
                '||bgrndi.com^', '||brokeloy.com^',
                '||cnamerutor.ru^',
                '||docfilms.info^', '||dreadfula.ru^',
                '||et-code.ru^',
                '||franecki.net^', '||film-doma.ru^',
                '||free-torrent.org^', '||free-torrent.pw^',
                '||free-torrents.org^', '||free-torrents.pw^',
                '||game-torrent.info^', '||gocdn.ru^',
                '||hdkinoshka.com^', '||hghit.com^', '||hindcine.net^',
                '||kiev.ua^', '||kinotochka.net^',
                '||kinott.com^', '||kinott.ru^', '||kuveres.com^',
                '||lepubs.com^', '||luxadv.com^', '||luxup.ru^', '||luxupcdna.com^',
                '||mail.ru^', '||marketgid.com^', '||mixadvert.com^', '||mxtads.com^',
                '||nickhel.com^',
                '||oconner.biz^', '||oconner.link^', '||octoclick.net^', '||octozoon.org^',
                '||pkpojhc.com^',
                '||psma01.com^', '||psma02.com^', '||psma03.com^',
                '||recreativ.ru^', '||redtram.com^', '||regpole.com^', '||rootmedia.ws^', '||ruttwind.com^',
                '||skidl.ru^',
                '||torvind.com^', '||traffic-media.co^', '||trafmag.com^',
                '||webadvert-gid.ru^', '||webadvertgid.ru^',
                '||xxuhter.ru^',
                '||yuiout.online^',
                '||zoom-film.ru^'])
                masks.push(new RegExp(
                    filter.replace(/([\\\/\[\].*+?(){}$])/g, '\\$1')
                    .replace(/\^(?!$)/g,'\\.?[^\\w%._-]')
                    .replace(/\^$/,'\\.?([^\\w%._-]|$)')
                    .replace(/^\|\|/,'^(ws|http)s?:\\/+([^\/.]+\\.)*'),
                    'i'));
 
            function isBlocked(url) {
                for (let mask of masks)
                    if (mask.test(url))
                        return true;
                return false;
            }
 
            let realWebSocket = win.WebSocket;
            function wsGetter(target, name)
            {
                try {
                    if (typeof realWebSocket.prototype[name] === 'function')
                    {
                        if (name === 'close' || name === 'send') // send also closes connection
                            target.readyState = realWebSocket.CLOSED;
                        return (
                            function fake() {
                                console.log('[WSI] Invoked function "'+name+'"', '| Tracing', (new Error()));
                                return;
                            }
                        );
                    }
                    if (typeof realWebSocket.prototype[name] === 'number')
                        return realWebSocket[name];
                } catch(ignore) {}
                return target[name];
            }
 
            function createWebSocketWrapper(target)
            {
                return new Proxy(realWebSocket, {
                    construct: function (target, args)
                    {
                        let url = args[0];
                        console.log('[WSI] Opening socket on ' + url + ' \u2026');
                        if (isBlocked(url))
                        {
                            console.log("[WSI] Blocked.");
                            return new Proxy({
                                url: url,
                                readyState: realWebSocket.OPEN
                            }, {
                                get: wsGetter,
                                set: (val) => val
                            });
                        }
                        return new target(args[0], args[1]);
                    }
                });
            }
 
            function WorkerWrapper()
            {
                let realWorker = win.Worker;
                win.Worker = function Worker() {
                    let isBlobURL = /^blob:/i,
                        resourceURI = arguments[0],
                        deepLogMode = false,
                        _callbacks = new WeakMap(),
                        _worker = null,
                        _onevs = { names: ['onmessage', 'onerror'] },
                        _actions = [],
                        /*jshint validthis:true */
                        _self = this;
 
                    function log()
                    {
                        if (deepLogMode)
                            console.log.apply(this, arguments);
                    }
 
                    function callbackWrapper(func)
                    {
                        if (typeof func !== 'function')
                            return undefined;
 
                        return function callback()
                        {
                            return func.apply(_self, arguments);
                        };
                    }
 
                    function updateWorker()
                    {
                        for (let [action, name, args] of _actions) {
                            log(_worker, action, name, args);
                            if (action === 'set')
                                _worker[name] = callbackWrapper(args);
                            if (action === 'call')
                                _worker[name].apply(_worker, args);
                        }
                        _actions.length = 0;
                        log('Applied buffered actions.');
                    }
 
                    for (let prop of _onevs.names)
                        Object.defineProperty(_self, prop, {
                            set: function(val) {
                                _onevs[prop] = val;
                                if (_worker)
                                    _worker[prop] = callbackWrapper(val);
                                else {
                                    _actions.push(['set', prop, val]);
                                    log('Stored into buffer:', arguments);
                                }
                                return val;
                            },
                            get: () => _onevs[prop],
                            enumerable: true
                        });
 
                    _self.postMessage = function()
                    {
                        if (_worker)
                            _worker.postMessage.apply(_worker, arguments);
                        else {
                            _actions.push(['call', 'postMessage', arguments]);
                            log('Stored into buffer:', arguments);
                        }
                    };
                    _self.terminate = function()
                    {
                        if (_worker)
                            _worker.terminate();
                        else {
                            _actions.push(['call','terminate', arguments]);
                            log('Stored into buffer:', arguments);
                        }
                    };
                    _self.addEventListener = function(event, callback, other)
                    {
                        if (typeof callback !== 'function')
                            return;
 
                        if (!_callbacks.has(callback))
                            _callbacks.set(callback, callbackWrapper(callback));
 
                        arguments[1] = _callbacks.get(callback);
                        if (_worker)
                            _worker.addEventListener.apply(_worker, arguments);
                        else {
                            _actions.push(['call', 'addEventListener', arguments]);
                            log('Stored into buffer:', arguments);
                        }
                    };
                    _self.removeEventListener = function(event, callback, other)
                    {
                        if (typeof callback !== 'function' || !_callbacks.has(callback))
                            return;
 
                        arguments[1] = _callbacks.get(callback);
                        _callbacks.delete(callback);
                        if (_worker)
                            _worker.removeEventListener.apply(_worker, arguments);
                        else {
                            _actions.push(['call', 'removeEventListener', arguments]);
                            log('Stored into buffer:', arguments);
                        }
                    };
 
                    if (!isBlobURL.test(resourceURI))
                    {
                        _worker = new realWorker(resourceURI);
                        return; // not a blob, no need to wrap
                    }
 
                    (new Promise(
                        function(resolve, reject)
                        {
                            let xhr = new XMLHttpRequest();
                            xhr.responseType = 'blob';
                            try {
                                xhr.open('GET', resourceURI, true);
                            } catch(e) {
                                return reject(e);
                            }
                            if (xhr.readyState !== XMLHttpRequest.OPENED) {
                                // connection wasn't opened, unable to continue wrapping procedure
                                return reject(xhr.readyState);
                            }
                            xhr.onload = function(e)
                            {
                                if (e.target.status === 200)
                                {
                                    let reader = new FileReader();
                                    reader.addEventListener(
                                        'loadend', function(e)
                                        {
                                            resolve(
                                                new realWorker(URL.createObjectURL(
                                                    new Blob([getWrappedCode(false) + e.target.result])
                                                ))
                                            );
                                        }, false
                                    );
                                    reader.readAsText(e.target.response);
                                } else {
                                    return reject(e);
                                }
                            };
                            xhr.onerror = (e) => reject(e);
                            xhr.send();
                        }
                    )).then(
                        function(val)
                        {
                            _worker = val;
                            updateWorker();
                        }
                    ).catch(
                        function(e)
                        {
                            // connection were blocked by CSP or something else triggered error event on xhr object
                            // unable to proceed with wrapper, return object as-is
                            _worker = new realWorker(resourceURI);
                            updateWorker();
                        }
                    );
 
                    if (deepLogMode)
                    {
                        return new Proxy(_self, {
                            get: function(target, prop) {
                                console.log('Worker _get_', prop);
                                return target[prop];
                            },
                            set: function(target, prop, val) {
                                console.log('Worker _set_', prop, '_to_', val);
                                target[prop] = val;
                                return val;
                            }
                        });
                    }
                }.bind(safeWin);
            }
 
            function CreateElementWrapper()
            {
                let key = '_'+Math.random().toString(36).substr(2),
                    _createElement = Document.prototype.createElement,
                    _addEventListener = Element.prototype.addEventListener,
                    isDataURL = /^data:/i,
                    isBlobURL = /^blob:/i;
 
                // IFrame SRC get/set wrapper
                let ifGetSet = Object.getOwnPropertyDescriptor(HTMLIFrameElement.prototype, 'src');
                if (ifGetSet)
                {
                    let code = encodeURIComponent('<scr'+'ipt>'+getWrappedCode(true)+'</scr'+'ipt>\n'),
                        dataSrc = new WeakMap(),
                        _ifSet = ifGetSet.set,
                        _ifGet = ifGetSet.get;
                    ifGetSet.set = function(val)
                    {
                        if (this[key] && val === dataSrc.get(this))
                        { // if already processed data URL then do nothing
                            delete this[key];
                            return null;
                        }
                        let isData = isDataURL.test(val);
                        if (isData && val.indexOf(code) < 0)
                        {
                            dataSrc.set(this, val);
                            val = val.replace(',',',' + code);
                        }
                        if (!isData && dataSrc.get(this))
                            dataSrc.delete(this);
                        return _ifSet.call(this, val);
                    };
                    ifGetSet.get = function()
                    {
                        return dataSrc.get(this) || _ifGet.call(this);
                    };
                    Object.defineProperty(HTMLIFrameElement.prototype, 'src', ifGetSet);
                }
 
                function frameSetWSWrapper(e)
                {
                    let frm = e.target;
                    try {
                        if (!frm.src || isBlobURL.test(frm.src))
                            frm.contentWindow.WebSocket = createWebSocketWrapper();
                    } catch (ignore) {}
                }
 
                let scriptMap = new WeakMap();
                scriptMap.isBlocked = isBlocked;
                let onErrorWrapper = {
                    set: function(val)
                    {
                        if (scriptMap.has(this))
                        {
                            this.removeEventListener('error', scriptMap.get(this).wrp, false);
                            scriptMap.delete(this);
                        }
                        if (!val || typeof val !== 'function')
                            return val;
 
                        scriptMap.set(this, {
                            org: val,
                            wrp: function()
                            {
                                if (scriptMap.isBlocked(this.src))
                                    console.log('[WSI] Blocked "onerror" callback from', this);
                                else
                                    scriptMap.get(this).org.apply(this, arguments);
                            }
                        });
                        this.addEventListener('error', scriptMap.get(this).wrp, false);
 
                        return val;
                    },
                    get: function()
                    {
                        return scriptMap.has(this) ? scriptMap.get(this).org : null;
                    },
                    enumerable: true
                };
                Document.prototype.createElement = function createElement(name) {
                    /*jshint validthis:true */
                    let el = _createElement.apply(this, arguments);
 
                    if (el.tagName === 'IFRAME')
                        _addEventListener.call(el, 'load', frameSetWSWrapper, false);
                    if (el.tagName === 'SCRIPT')
                        Object.defineProperty(el, 'onerror', onErrorWrapper);
 
                    return el;
                };
 
                document.addEventListener(
                    'DOMContentLoaded', function()
                    {
                        for (let ifr of document.querySelectorAll('IFRAME'))
                        {
                            if (isDataURL.test(ifr.src))
                            {
                                ifr[key] = true;
                                ifr.src = ifr.src; // call setter and let it do the job
                            }
                            _addEventListener.call(ifr, 'load', frameSetWSWrapper, false);
                        }
                    }, false
                );
            }
 
            this.init = function()
            {
                win.WebSocket = createWebSocketWrapper();
                if (!(/firefox/i.test(navigator.userAgent))) // skip WorkerWrapper in Firefox
                    (new Promise(
                        function(resolve, reject)
                        { // test is it possible to run inline scripts
                            if (self.constructor.name.indexOf('Worker') > -1)
                                return resolve(); // running within a Worker
                            let onerr = window.onerror,
                                onscr = (e) => resolve();
                            // for some reason addEventListener on 'error' doesn't catch this error
                            window.onerror = (e) => reject(e);
                            window.addEventListener('inlineSuccess', onscr, false);
                            let scr = document.createElement('script');
                            scr.textContent = "window.dispatchEvent(new Event('inlineSuccess'));";
                            document.documentElement.appendChild(scr);
                            document.documentElement.removeChild(scr);
                            window.removeEventListener('inlineSuccess', onscr, false);
                            window.onerror = onerr;
                        }
                    )).then(
                        (e) => WorkerWrapper()
                    ).catch(
                        (e) => console.log('[WSI] Unable to create inline script. Skipping Worker wrapper to avoid further issues.', e)
                    );
                if (typeof document !== 'undefined')
                    CreateElementWrapper();
            };
        }
 
        if (isFirefox)
        {
            let script = _createElement('script');
            script.textContent = getWrappedCode(true);
            _appendChild(script);
            _removeChild(script);
            return; //we don't want to call functions on page from here in Fx, so exit
        }
 
        (new WSI((unsafeWindow||self||window),(self||window))).init();
    }
 
    if (!isFirefox)
    { // scripts for non-Firefox browsers
        // https://greasyfork.org/scripts/14720-it-s-not-important
        {
            let imptt = /((display|(margin|padding)(-top|-bottom)?)\s*:[^;!]*)!\s*important/ig,
                ret_b = (a,b) => b,
                _toLowerCase = String.prototype.toLowerCase,
                protectedNodes = new WeakSet(),
                log = false;
 
            let logger = function()
            {
                if (log)
                    console.log('Some page elements became a bit less important.');
                log = false;
            };
 
            let unimportanter = function(node)
            {
                let style = (node.nodeType === Node.ELEMENT_NODE) ?
                    _getAttribute.call(node, 'style') : null;
 
                if (!style || !imptt.test(style) || node.style.display === 'none' ||
                    (node.src && node.src.slice(0,17) === 'chrome-extension:')) // Web of Trust IFRAME and similar
                    return false; // get out if we have nothing to do here
 
                protectedNodes.add(node);
                _setAttribute.call(node, 'style',
                                   style.replace(imptt, ret_b));
                log = true;
            };
 
            (new MutationObserver(
                function(mutations)
                {
                    setTimeout(
                        function(ms)
                        {
                            let m, node;
                            for (m of ms) for (node of m.addedNodes)
                                unimportanter(node);
                            logger();
                        }, 0, mutations
                    );
                }
            )).observe(document, {
                childList : true,
                subtree : true
            });
 
            Element.prototype.setAttribute = function setAttribute(name, value)
            {
                "[native code]";
                let replaced = value;
                if (_toLowerCase.call(name) === 'style' && protectedNodes.has(this))
                    replaced = value.replace(imptt, ret_b);
                log = (replaced !== value);
                logger();
                return _setAttribute.call(this, name, replaced);
            };
 
            win.addEventListener (
                'load', function()
                {
                    for (let imp of document.querySelectorAll('[style*="!"]'))
                        unimportanter(imp);
                    logger();
                }, false
            );
        }
 
        // Naive ABP Style protector
        {
            let _appendChild = Node.prototype.appendChild;
            Node.prototype.appendChild = function(child)
            {
                if (this instanceof ShadowRoot &&
                    child instanceof HTMLContentElement)
                    return _appendChild.call(this, _createElement('shadow'));
                return _appendChild.apply(this, arguments);
            };
            let style;
            (new Promise(
                function(resolve, reject)
                {
                    let _querySelector = Document.prototype.querySelector.bind(document);
                    let getStyle = () => _querySelector('::shadow style');
                    style = getStyle();
                    if (style)
                        return resolve(style);
                    let intv = setInterval(
                        function()
                        {
                            style = getStyle();
                            if (!style)
                                return;
                            intv = clearInterval(intv);
                            return resolve(style);
                        }, 0
                    );
                    document.addEventListener(
                        'DOMContentLoaded',
                        function()
                        {
                            if (intv)
                                clearInterval(intv);
                            style = getStyle();
                            return style ? resolve(style) : reject();
                        },
                        false
                    );
                }
            )).then(
                function(style)
                {
                    let emptyArr = [],
                        nullStr = {
                            get: () => '',
                            set: (x) => x
                        };
                    Object.defineProperties(style, {
                        innerHTML: nullStr,
                        textContent: nullStr
                    });
                    Object.defineProperties(style.sheet, {
                        deleteRule: () => null,
                        cssRules: emptyArr,
                        rules: emptyArr
                    });
                }
            ).catch(()=>null);
            let _removeChild = Node.prototype.removeChild;
            Node.prototype.removeChild = function(child)
            {
                if (child === style)
                    return;
                return _removeChild.apply(this, arguments);
            };
        }
    }
 
    if (/^https?:\/\/(mail\.yandex\.|music\.yandex\.|news\.yandex\.|(www\.)?yandex\.[^\/]+\/(yand)?search[\/?])/i.test(win.location.href))
        // https://greasyfork.org/en/scripts/809-no-yandex-ads
        document.addEventListener(
            'DOMContentLoaded', function()
            {
                let adWords = [/Яндекс.Директ/i, /Реклама/i, /Ad/i],
                    genericAdSelectors = (
                        '.serp-adv__head + .serp-item,'+
                        '#adbanner,'+
                        '.serp-adv,'+
                        '.b-spec-adv,'+
                        'div[class*="serp-adv__"]:not(.serp-adv__found):not(.serp-adv__displayed)'
                    );
                // Generic ads removal and fixes
                {
                    let node = document.querySelector('.serp-header');
                    if (node)
                        node.style.marginTop = '0';
                    for (node of document.querySelectorAll(genericAdSelectors))
                        remove(node);
                }
                // Short name for parentNode.removeChild
                function remove(node) {
                    node.parentNode.removeChild(node);
                }
                // Search ads
                function removeSearchAds()
                {
                    let node, subNode, content;
                    for (node of document.querySelectorAll('.t-construct-adapter__legacy'))
                    {
                        subNode = node.querySelector('.organic__subtitle');
                        if (subNode)
                            content = window.getComputedStyle(subNode, ':after').content.replace(/"/g,'');
                        if (subNode && content && adWords.map((expr)=>expr.test(content)).indexOf(true) > -1)
                        {
                            remove(node);
                            console.log('Ads removed.');
                        }
                    }
                }
                // News ads
                function removeNewsAds()
                {
                    for (let node of document.querySelectorAll(
                        '.page-content__left > *,'+
                        '.page-content__right > *:not(.page-content__col),'+
                        '.page-content__right > .page-content__col > *'
                    ))
                        if (adWords[0].test(node.textContent) ||
                            (node.clientHeight < 15 && s.classList.contains('rubric')))
                        {
                            remove(node);
                            console.log('Ads removed.');
                        }
                }
                // Music ads
                function removeMusicAds()
                {
                    for (let node of document.querySelectorAll('.ads-block'))
                        remove(node);
                }
                // Mail ads
                function removeMailAds()
                {
                    let slice = Array.prototype.slice,
                        nodes = slice.call(document.querySelectorAll('.ns-view-folders')),
                        node, len, cls;
 
                    for (node of nodes)
                        if (!len || len > node.classList.length)
                            len = node.classList.length;
 
                    node = nodes.pop();
                    while (node)
                    {
                        if (node.classList.length > len)
                            for (cls of slice.call(node.classList))
                                if (cls.indexOf('-') === -1)
                                {
                                    remove(node);
                                    break;
                                }
                        node = nodes.pop();
                    }
                }
                // News fixes
                function removePageAdsClass()
                {
                    if (document.body.classList.contains("b-page_ads_yes"))
                    {
                        document.body.classList.remove("b-page_ads_yes");
                        console.log('Page ads class removed.');
                    }
                }
                // Function to attach an observer to monitor dynamic changes on the page
                function pageUpdateObserver(func, obj, params) {
                    if (obj)
                        (new MutationObserver(func))
                        .observe(obj, (params || { childList:true, subtree:true }));
                }
 
                if (win.location.hostname.search(/^mail\./i) === 0) {
                    pageUpdateObserver(
                        function(ms, o)
                        {
                            let aside = document.querySelector('.mail-Layout-Aside');
                            if (aside) {
                                o.disconnect();
                                pageUpdateObserver(removeMailAds, aside);
                            }
                        }, document.body
                    );
                    removeMailAds();
                } else if (win.location.hostname.search(/^music\./i) === 0) {
                    pageUpdateObserver(removeMusicAds, document.querySelector('.sidebar'));
                    removeMusicAds();
                } else if (win.location.hostname.search(/^news\./i) === 0) {
                    pageUpdateObserver(removeNewsAds, document.body);
                    pageUpdateObserver(removePageAdsClass, document.body, { attributes:true, attributesFilter:['class'] });
                    removeNewsAds();
                    removePageAdsClass();
                } else {
                    pageUpdateObserver(removeSearchAds, document.querySelector('.main__content'));
                    removeSearchAds();
                }
            }
        );
 
    // Yandex Link Tracking
    if (/^https?:\/\/([^.]+\.)*yandex\.[^\/]+/i.test(win.location.href))
    {
        let fakeRoot = {
            appendChild: ()=>null,
            firstChild: null
        };
        Element.prototype.createShadowRoot = () => fakeRoot;
        Object.defineProperty(Element.prototype, "shadowRoot", {
            value: fakeRoot,
            enumerable: true,
            configurable: false
        });
        // Partially based on https://greasyfork.org/en/scripts/22737-remove-yandex-redirect
        let selectors = (
            'A[onmousedown*="/jsredir"],'+
            'A[data-vdir-href],'+
            'A[data-counter]'
        );
        let removeTrackingAttributes = function(link)
        {
            link.removeAttribute('onmousedown');
            if (link.hasAttribute('data-vdir-href')) {
                link.removeAttribute('data-vdir-href');
                link.removeAttribute('data-orig-href');
            }
            if (link.hasAttribute('data-counter')) {
                link.removeAttribute('data-counter');
                link.removeAttribute('data-bem');
            }
        };
        let removeTracking = function(scope)
        {
            for (let link of scope.querySelectorAll(selectors))
                removeTrackingAttributes(link);
        };
        document.addEventListener('DOMContentLoaded', (e) => removeTracking(e.target));
        (new MutationObserver(
            function(ms)
            {
                let m, node;
                for (m of ms) for (node of m.addedNodes) if (node.nodeType === Node.ELEMENT_NODE)
                    if (node.tagName === 'A' && node.matches(selectors)) {
                        removeTrackingAttributes(node);
                    } else {
                        removeTracking(node);
                    }
            }
        )).observe(_de, { childList: true, subtree: true });
 
        //skip fixes for other sites
        return;
    }
 
    // https://greasyfork.org/en/scripts/21937-moonwalk-hdgo-kodik-fix v0.8 (adapted)
    document.addEventListener(
        'DOMContentLoaded', function()
        {//createPlayer();
            function log (e) {
                console.log('Player FIX: Detected', e, 'player in', win.location.href);
            }
            if (win.adv_enabled !== undefined && win.condition_detected !== undefined)
            {
                log('Moonwalk');
                if (win.adv_enabled)
                    win.adv_enabled = false;
                win.condition_detected = false;
                if (win.MXoverrollCallback)
                    document.addEventListener(
                        'click', function catcher(e)
                        {
                            e.stopPropagation();
                            win.MXoverrollCallback.call(window);
                            document.removeEventListener('click', catcher, true);
                        }, true
                    );
            }
            else if (win.stat_url !== undefined && win.is_html5 !== undefined && win.is_wp8 !== undefined)
            {
                log('HDGo');
                document.body.onclick = null;
                let tmp = document.querySelector('#swtf');
                if (tmp)
                    tmp.style.display = 'none';
                if (win.banner_second !== undefined)
                    win.banner_second = 0;
                if (win.$banner_ads !== undefined)
                    win.$banner_ads = false;
                if (win.$new_ads !== undefined)
                    win.$new_ads = false;
                if (win.createCookie !== undefined)
                    win.createCookie('popup', 'true', '999');
                if (win.canRunAds !== undefined && win.canRunAds !== true)
                    win.canRunAds = true;
            }
            else if (win.MXoverrollCallback && win.iframeSearch !== undefined)
            {
                log('Kodik');
                let tmp = document.querySelector('.play_button');
                if (tmp)
                    tmp.onclick = win.MXoverrollCallback.bind(window);
                win.IsAdBlock = false;
            }
            else if (win.getnextepisode && win.uppodEvent)
            {
                log('Share-Serials.net');
                scriptLander(
                    function()
                    {
                        let _setInterval = win.setInterval,
                            _setTimeout = win.setTimeout;
                        win.setInterval = function(func)
                        {
                            if (func instanceof Function && func.toString().indexOf('_delay') > -1)
                            {
                                let intv = _setInterval.call(
                                    this, function()
                                    {
                                        _setTimeout.call(
                                            this, function(intv)
                                            {
                                                clearInterval(intv);
                                                let timer = document.querySelector('#timer');
                                                if (timer)
                                                    timer.click();
                                            }, 100, intv);
                                        func.call(this);
                                    }, 5
                                );
 
                                return intv;
                            }
                            return _setInterval.apply(this, arguments);
                        };
                        win.setTimeout = function(func) {
                            if (func instanceof Function && func.toString().indexOf('adv_showed') > -1)
                            {
                                return _setTimeout.call(this, func, 0);
                            }
                            return _setTimeout.apply(this, arguments);
                        };
                    }
                );
            }
        }, false
    );
 
    // Automated protection against specific circumvention method based on unwrapping various functions,
    // hiding ads in the Shadow DOM and injecting iFrames with ads. Previously this code were known as
    // apiBreaker since it were breaking Shadow DOM and onerror/onload API on specific domains. This
    // version should be safe enough to run on majority of sites without actually breaking them.
    scriptLander(
        function()
        {
            let blacklist = new WeakMap();
            /* Wrap functions used to attach shadow root to a node */
            for (let func of ['createShadowRoot', 'attachShadow'])
                if (func in Element.prototype)
                    Element.prototype[func] = (
                        (func) => function()
                        {
                            blacklist.set(this, true);
                            return func.apply(this, arguments);
                        }
                    )(Element.prototype[func]);
 
            /* Wrap functions used to insert/append elements to check for IFRAME objects */
            for (let func of [/*'appendChild', */'insertBefore'])
                Object.defineProperty(
                    Element.prototype, func, {
                        enumerable: true,
                        value: (
                            (func) => function(el, par)
                            {
                                if (el.tagName === 'IFRAME' &&
                                    (typeof par === 'object' && blacklist.get(par)))
                                {
                                    console.log('Blocked suspicious', func.name, arguments);
                                    return null;
                                }
                                return func.apply(this, arguments);
                            }
                        )(Element.prototype[func])
                    }
                );
        }
    );
 
    // === Helper functions ===
 
    // function to search and remove nodes by content
    // selector - standard CSS selector to define set of nodes to check
    // words - regular expression to check content of the suspicious nodes
    // params - object with multiple extra parameters:
    //   .log - display log in the console
    //   .hide - set display to none instead of removing from the page
    //   .parent - parent node to remove if content is found in the child node
    //   .siblings - number of simling nodes to remove (excluding text nodes)
    let scRemove = (node) => node.parentNode.removeChild(node);
    let scHide = function(node)
    {
        let style = _getAttribute.call(node, 'style') || '',
            hide = ';display:none!important;';
        if (style.indexOf(hide) < 0)
            _setAttribute.call(node, 'style', style + hide);
    };
    function scissors (selector, words, scope, params)
    {
        if (params.log)
            console.log('[s] starting with', selector, words, scope, JSON.stringify(params));
        let remFunc = (params.hide ? scHide : scRemove),
            iterFunc = (params.siblings > 0 ? 'nextSibling' : 'previousSibling'),
            toRemove = [],
            siblings;
        for (let node of scope.querySelectorAll(selector))
        {
            if (params.log)
                console.log('[s] found node', node);
            if (params.parent)
            {
                while(node !== scope && !(node.matches(params.parent)))
                    node = node.parentNode;
                if (params.log)
                    console.log('[s] moving to parent node', node);
                if (node === scope)
                {
                    if (params.log)
                        console.log('[s] reached scope node, nothing to remove here.');
                    break;
                }
            }
            if (words.test(node.innerHTML) || !node.childNodes.length)
            {
                // drill up to the specified parent node if required
                if (toRemove.indexOf(node) === -1)
                {
                    if (params.log)
                        console.log('[s] adding node into list for removal');
                    toRemove.push(node);
                    // add multiple nodes if defined more than one sibling
                    siblings = Math.abs(params.siblings) || 0;
                    while (siblings)
                    {
                        node = node[iterFunc];
                        if (node.nodeType === Node.ELEMENT_NODE)
                        {
                            if (params.log)
                                console.log('[s] adding sibling node', node);
                            toRemove.push(node);
                            siblings -= 1; //count only element nodes
                        }
                        else if (!params.hide)
                        {
                            if (params.log)
                                console.log('[s] adding sibling node', node);
                            toRemove.push(node);
                        }
                    }
                } else {
                    if (params.log)
                        console.log('[s] node already marked for removal');
                }
            } else {
                if (params.log)
                    console.log('[s] word test failed, proceed to the next node');
            }
        }
        if (params.log)
            console.log('[s] proceeding with', (params.hide?'hide':'removal'), 'of', toRemove);
        for (let node of toRemove)
            remFunc(node);
 
        return toRemove.length;
    }
 
    // function to perform multiple checks if ads inserted with a delay
    // by default does 30 checks withing a 3 seconds unless nonstop mode specified
    // also does 1 extra check when a page completely loads
    // selector and words - passed dow to scissors
    // params - object with multiple extra parameters:
    //   .log - display log in the console
    //   .root - selector to narrow down scope to scan;
    //   .observe - if true then check will be performed continuously;
    // Other parameters passed down to scissors.
    function gardener(selector, words, params)
    {
        params = params || {};
        if (params.log)
            console.log('[g] starting with', selector, words, JSON.stringify(params));
        let scope = document,
            nonstop = false;
        // narrow down scope to a specific element
        if (params.root)
        {
            scope = scope.querySelector(params.root);
            if (!scope) // exit if the root element is not present on the page
                return 0;
            if (params.log)
                console.log('[g] scope', scope);
        }
        // add observe mode if required
        if (params.observe)
        {
            if (typeof MutationObserver === 'function')
            {
                (new MutationObserver(
                    function(ms)
                    {
                        for (let m of ms) if (m.addedNodes.length)
                            scissors(selector, words, scope, params);
                    }
                )).observe(scope, { childList:true, subtree: true });
                if (params.log)
                    console.log('[g] observer enabled');
            } else {
                nonstop = true;
                if (params.log)
                    console.log('[g] nonstop mode enabled');
            }
        }
        // wait for a full page load to do one extra cut
        win.addEventListener(
            'load', function()
            {
                if (params.log)
                    console.log('[g] onload cleanup');
                scissors(selector, words, scope, params);
            }
        );
        // do multiple cuts during page load until ads removed
        function cut(sci, s, w, sc, p, i)
        {
            if (i > 0)
                i -= 1;
            if (i && !sci(s, w, sc, p))
                setTimeout(cut, 100, sci, s, w, sc, p, i);
        }
        cut(scissors, selector, words, scope, params, (nonstop ? -1 : 30));
    }
 
    // Helper function to close background tab if site opens itself in a new tab and then
    // loads a 3rd-party page in the background one (thus performing background redirect).
    function preventBackgroundRedirect()
    {
        // create "cose_me" event to call high-level window.close()
        let key = Math.random().toString(36).substr(2);
        window.addEventListener('close_me_' + key, () => window.close());
 
        // window.open wrapper
        function pbrLander()
        {
            let _open = window.open,
                idx = String.prototype.indexOf,
                event = new CustomEvent("close_me_%key%", {});
            // site went to a new tab and attempts to unload
            // call for high-level close through event
            let closeWindow = () => window.dispatchEvent(event);
 
            // window.open wrapper
            window.open = function open()
            {
                console.log(arguments, window.location.host);
                if (arguments[0] &&
                    (idx.call(arguments[0], window.location.host) > -1 ||
                     idx.call(arguments[0], '://') === -1))
                    window.addEventListener('unload', closeWindow, true);
                _open.apply(window, arguments);
            }.bind(window);
 
            // Node.createElement wrapper to prevent click-dispatch in Google Chrome and similar browsers
            let _createElement = Document.prototype.createElement;
            Document.prototype.createElement = function createElement(name)
            {
                /*jshint validthis:true */
                let el = _createElement.apply(this, arguments);
                if (el.tagName === 'A')
                    el.addEventListener(
                        'click', function(e)
                        {
                            if (!e.target.parentNode || !e.isTrusted)
                                window.addEventListener('unload', closeWindow, true);
                        }, false
                    );
                return el;
            };
            console.log("Background redirect prevention enabled.");
        }
 
        // land wrapper on the page
        let script = document.createElement('script');
        script.textContent = '('+pbrLander.toString().replace(/%key%/g,key)+')();';
        _appendChild(script);
        _removeChild(script);
    }
 
    // Function to catch and block various methods to open a new window with 3rd-party content.
    // Some advertisement networks went way past simple window.open call to circumvent default popup protection.
    // This funciton blocks window.open, ability to restore original window.open from an IFRAME object,
    // ability to perform an untrusted (not initiated by user) click on a link, click on a link without a parent
    // node or simply a link with piece of javascript code in the HREF attribute.
    function preventPopups()
    {
        if (inIFrame)
        {
            let i = -1, val;
            do {
                i++;
                val = GM_getValue('forbid.popups.' + i);
            } while(val & val !== win.location.href);
            GM_setValue('forbid.popups.' + i, win.location.href);
            win.top.postMessage('forbid.popups.' + i, '*');
            return;
        }
 
        scriptLander(
            function()
            {
                let _createElement = Document.prototype.createElement,
                    _appendChild = Element.prototype.appendChild;
 
                function open()
                {
                    '[native code]';
                    console.log('Site attempted to open a new window', arguments);
                    return {
                        document: {
                            write: () => {},
                            writeln: () => {}
                        }
                    };
                }
 
                function redefineOpen(obj)
                {
                    Object.defineProperty(obj, 'open', {
                        get: () => open,
                        set: (val) => val,
                        enumerable: true
                    });
                }
                redefineOpen(win);
 
                Document.prototype.createElement = function createElement(name)
                {
                    /*jshint validthis:true */
                    let el = _createElement.apply(this, arguments);
                    if (el.tagName === 'A')
                        el.addEventListener(
                            'click', function(e)
                            {
                                if (!e.target.parentNode || !e.isTrusted ||
                                    (e.target.href && e.target.href.toLowerCase().indexOf('javascript') > -1))
                                {
                                    e.preventDefault();
                                    console.log('Blocked suspicious click event', e, 'on', e.target);
                                }
                            }, false
                        );
                    if (el.tagName === 'IFRAME')
                        el.addEventListener(
                            'load', function(e)
                            {
                                try {
                                    redefineOpen(e.target.contentWindow);
                                } catch(ignore) {}
                            }, false
                        );
                    return el;
                };
 
                Element.prototype.appendChild = function appendChild()
                {
                    /*jshint validthis:true */
                    let el = _appendChild.apply(this, arguments);
                    if (el && el.nodeType === Node.ELEMENT_NODE && el.tagName === 'IFRAME') {
                        try {
                            redefineOpen(el.contentWindow);
                        } catch(ignore) {}
                    }
                    return el;
                };
                console.log('Popup prevention enabled.');
            }
        );
    }
    // External listener for case when site known to open popups were loaded in iframe
    // It will sandbox any iframe which will send message 'forbid.popups' (preventPopups sends it)
    // Some sites replace frame's window.location with data-url to run in clean context
    if (!inIFrame)
    {
        let popWindows = new WeakSet();
        window.addEventListener(
            'message', function(e)
            {
                if (typeof e.data === "string" && e.data.slice(0,13) === 'forbid.popups' &&
                    !popWindows.has(e.source))
                {
                    let src = GM_getValue(e.data);
                    if (src)
                        GM_deleteValue(e.data);
                    popWindows.add(e.source); // remember window of iframe with suspected domain
                    for (let frame of document.querySelectorAll('iframe'))
                        if (frame.contentWindow === e.source)
                        {
                            if (frame.hasAttribute('sandbox'))
                                // remove allow-popups if frame already sandboxed
                                frame.sandbox.remove('allow-popups');
                            else
                                // set sandbox mode for troublesome frame and allow scripts and forms
                                frame.setAttribute('sandbox','allow-forms allow-scripts');
                            console.log('Disallowed popups from iframe', frame);
 
                            // reload frame content to apply restrictions
                            if (!src) {
                                src = frame.src;
                                console.log('Unable to get current iframe location, reloading from src', src);
                            } else
                                console.log('Reloading iframe with URL', src);
                            frame.src = 'about:blank';
                            frame.src = src;
                        }
                }
            }, false
        );
    }
 
    // Currently unused piece of code developed to prevent site from registering serviceWorker
    // and uninstall any existing instances of serivceWorker in case there is one already.
    /* Commented out since not used
    function forbidServiceWorker()
    {
        if (!("serviceWorker" in navigator))
            return;
        let svr = navigator.serviceWorker.ready;
        Object.defineProperty(navigator, 'serviceWorker', {
            value: {
                register: function()
                {
                    console.log('Registration of serviceWorker ' + arguments[0] + ' blocked.');
                    return new Promise(function(){});
                },
                ready: new Promise(() => null),
                addEventListener: () => null
            }
        });
        document.addEventListener(
            'DOMContentLoaded', function()
            {
                if (!svr)
                    return;
                svr.then(
                    function(sw)
                    {
                        console.log('Found existing serviceWorker:', sw);
                        console.log('Attempting to unregister...');
                        sw.unregister().then(
                            () => console.log('Done.')
                        ).catch(
                            function(err)
                            {
                                console.log('Unregistration failed. :(', err);
                                console.log('Try to remove it manually:');
                                console.log(' 1. Open: chrome://serviceworker-internals/ (Google Chrome and alike) or about:serviceworkers (Mozilla Firefox) in a new tab.');
                                console.log(' 2. Search there for one with "'+document.domain+'" in the name.');
                                console.log(' 3. Use buttons in the same block with service you found to stop it and uninstall/unregister.');
                            }
                        );
                    }
                ).catch(
                    (e) => console.log("LOL, existing serviceWorker failed on it's own! -_-", e)
                );
            }, false
        );
    }
    /**/
 
    // Currently obsolete code developed to prevent error and load calls on objects supposed to load resources
    // from the internet like IMG or IFRAME, but missing SRC/HREF attribute. Usually tricks like this are used
    // to unwrap wrapped functions to be able to load ads.
    /* Commented out since not used
    function errorAndLoadEventsFilter()
    {
        let toString = Function.prototype.toString,
            _addEventListener = Element.prototype.addEventListener,
            _removeEventListener = Element.prototype.removeEventListener,
            hasAttribute = Element.prototype.hasAttribute,
            evtMap = new WeakMap();
        Element.prototype.addEventListener = function addEventListener(evt, func, capt) {
            if ((evt === 'error' || evt === 'load') && !evtMap.get(func))
            {
                evtMap.set(
                    func, function()
                    {
                        if (hasAttribute.call(this, 'src') ||
                            hasAttribute.call(this, 'href'))
                            func.apply(this, arguments);
                        else
                            console.log('Blocked', evt, 'handler', toString.call(func), 'on', this);
                    }
                );
            }
            _addEventListener.call(this, evt, (evtMap.get(func) || func), capt);
        };
        Element.prototype.removeEventListener = function removeEventListener(evt, func, capt) {
            _removeEventListener.call(this, evt, (evtMap.get(func) || func), capt);
        };
        Object.defineProperty(HTMLElement.prototype, 'onload', {
            set: function(func)
            {
                if(evtMap.has(this)) {
                    if (evtMap.get(this).onload)
                        _removeEventListener.call(this, 'load', evtMap.get(this).onload, false);
                    evtMap.get(this).onload = func;
                } else
                    evtMap.set(this, { onload: func });
 
                if (func)
                    _addEventListener.call(this, 'load', func, false);
 
                return func;
            },
            get: function()
            {
                return evtMap.has(this) ? evtMap.get(this).onload : null;
            }
        });
        Object.defineProperty(HTMLElement.prototype, 'onerror', {
            set: function(func)
            {
                if (evtMap.has(this))
                    evtMap.get(this).onerror = func;
                else
                    evtMap.set(this, { onerror: func });
 
                if (func)
                    console.log('Blocked error handler', toString.call(func), 'on', this);
 
                return func;
            },
            get: function()
            {
                return evtMap.has(this) ? evtMap.get(this).onerror : null;
            }
        });
    }
    /**/
 
    // === Scripts for specific domains ===
 
    let scripts = {};
    // prevent popups and redirects block
    // Popups
    scripts.preventPopups = {
        other: [
            'biqle.ru',
            'chaturbate.com',
            'dfiles.ru',
            'hentaiz.org',
            'mirrorcreator.com',
            'online-multy.ru', 'openload.co',
            'radikal.ru',
            'seedoff.cc', 'seedoff.tv',
            'tapochek.net', 'thepiratebay.org', 'torseed.net',
            'unionpeer.com',
            'zippyshare.com'
        ],
        now: preventPopups
    };
    // Background redirects
    scripts.preventBackgroundRedirect = {
        other: [
            'mediafire.com', 'megapeer.org', 'megapeer.ru',
            'perfectgirls.net',
            'turbobit.net'
        ],
        now: preventBackgroundRedirect
    };
 
    // other
    scripts['4pda.ru'] = {
        now: function()
        {
            // https://greasyfork.org/en/scripts/14470-4pda-unbrender
            let hStyle,
                isForum = document.location.href.search('/forum/') !== -1,
                remove = (node) => (node ? node.parentNode.removeChild(node) : null),
                afterClean = () => remove(hStyle);
 
            function beforeClean()
            {
                // attach styles before document displayed
                hStyle = createStyle([
                    'html { overflow-y: scroll }',
                    'section[id] {'+(
                        'position: absolute;'+
                        'width: 100%'
                    )+'}',
                    'article + aside * { display: none !important }',
                    '#header + div:after {'+(
                        'content: "";'+
                        'position: fixed;'+
                        'top: 0;'+
                        'left: 0;'+
                        'width: 100%;'+
                        'height: 100%;'+
                        'background-color: #E6E7E9'
                    )+'}',
                    // http://codepen.io/Beaugust/pen/DByiE
                    '@keyframes spin { 100% { transform: rotate(360deg) } }',
                    'article + aside:after {'+(
                        'content: "";'+
                        'position: absolute;'+
                        'width: 150px;'+
                        'height: 150px;'+
                        'top: 150px;'+
                        'left: 50%;'+
                        'margin-top: -75px;'+
                        'margin-left: -75px;'+
                        'box-sizing: border-box;'+
                        'border-radius: 100%;'+
                        'border: 10px solid rgba(0, 0, 0, 0.2);'+
                        'border-top-color: rgba(0, 0, 0, 0.6);'+
                        'animation: spin 2s infinite linear'
                    )+'}'
                ], {id:'ubrHider'}, true);
 
                // display content of a page if time to load a page is more than 2 seconds to avoid
                // blocking access to a page if it is loading for too long or stuck in a loading state
                setTimeout(2000, afterClean);
            }
 
            createStyle([
                '#nav .use-ad { display: block !important }',
                'article:not(.post) + article:not(#id),'+
                'html:not(#id)>body:not(#id) a[target="_blank"] img[height="90"] { display: none !important }'
            ]);
 
            if (!isForum)
                beforeClean();
 
            // save links to non-overridden functions to use later
            let protectedElems;
            // protect/hide changed attributes in case site attempt to restore them
            function styleProtector(eventMode)
            {
                let _toLowerCase = String.prototype.toLowerCase,
                    isStyleText = (t) => (_toLowerCase.call(t) === 'style'),
                    protectedElems = new WeakMap();
                function protoOverride(element, functionName, isStyleCheck, returnIfProtected)
                {
                    let originalFunction = element.prototype[functionName];
                    element.prototype[functionName] = function wrapper()
                    {
                        if (protectedElems.has(this) && isStyleCheck(arguments[0]))
                            return returnIfProtected(this, arguments);
                        return originalFunction.apply(this, arguments);
                    };
                }
                protoOverride(Element, 'removeAttribute', isStyleText, () => undefined);
                protoOverride(Element, 'hasAttribute', isStyleText, (_this) => protectedElems.get(_this) !== null);
                protoOverride(Element, 'setAttribute', isStyleText, (_this, args) => protectedElems.set(_this, args[1]));
                protoOverride(Element, 'getAttribute', isStyleText, (_this) => protectedElems.get(_this));
                if (!eventMode)
                    return protectedElems;
                else
                {
                    let e = document.createEvent('Event');
                    e.initEvent('protoOverride', false, false);
                    window.protectedElems = protectedElems;
                    window.dispatchEvent(e);
                }
            }
            if (!isFirefox)
                protectedElems = styleProtector(false);
            else
            {
                let script = document.createElement('script');
                script.textContent = '(' + styleProtector.toString() + ')(true);';
                window.addEventListener(
                    'protoOverride', function protoOverrideCallback(e)
                    {
                        if (win.protectedElems) {
                            protectedElems = win.protectedElems;
                            delete win.protectedElems;
                        }
                        document.removeEventListener('protoOverride', protoOverrideCallback, true);
                    }, true
                );
                _appendChild(script);
                _removeChild(script);
            }
 
            // clean a page
            window.addEventListener(
                'DOMContentLoaded', function()
                {
                    let width = () => window.innerWidth || _de.clientWidth || document.body.clientWidth || 0;
                    let height = () => window.innerHeight || _de.clientHeight || document.body.clientHeight || 0;
 
                    if (isForum)
                    {
                        let si = document.querySelector('#logostrip');
                        if (si)
                            remove(si.parentNode.nextSibling);
                    }
 
                    if (document.location.href.search('/forum/dl/') !== -1) {
                        document.body.setAttribute('style', (document.body.getAttribute('style')||'')+
                                                   ';background-color:black!important');
                        for (let itm of document.querySelectorAll('body>div'))
                            if (!itm.querySelector('.dw-fdwlink'))
                                remove(itm);
                    }
 
                    if (isForum) // Do not continue if it's a forum
                        return;
 
                    {
                        let si = document.querySelector('#header');
                        if (si)
                        {
                            let rem = si.previousSibling;
                            while (rem)
                            {
                                si = rem.previousSibling;
                                remove(rem);
                                rem = si;
                            }
                        }
                    }
 
                    for (let itm of document.querySelectorAll('#nav li[class]'))
                        if (itm && itm.querySelector('a[href^="/tag/"]'))
                            remove(itm);
 
                    let style, result,
                        fakeStyles = new WeakMap(),
                        styleProxy = {
                            get: function(target, prop)
                            {
                                let fakeStyle = fakeStyles.get(target);
                                return ((prop in fakeStyle) ? fakeStyle : target)[prop];
                            },
                            set: function(target, prop, value)
                            {
                                let fakeStyle = fakeStyles.get(target);
                                ((prop in fakeStyle) ? fakeStyle : target)[prop] = value;
                                return value;
                            }
                        };
                    for (let itm of document.querySelectorAll('DIV, A'))
                    {
                        if (itm.tagName ==='DIV' &&
                            itm.offsetWidth > 0.95 * width() &&
                            itm.offsetHeight > 0.85 * height())
                        {
                            style = window.getComputedStyle(itm, null);
                            result = [];
 
                            if (style.backgroundImage !== 'none')
                                result.push('background-image:none!important');
 
                            if (style.backgroundColor !== 'transparent' &&
                                style.backgroundColor !== 'rgba(0, 0, 0, 0)')
                                result.push('background-color:transparent!important');
 
                            if (result.length)
                            {
                                if (itm.getAttribute('style'))
                                    result.unshift(itm.getAttribute('style'));
 
                                fakeStyles.set(itm.style, {
                                    'backgroundImage': itm.style.backgroundImage,
                                    'backgroundColor': itm.style.backgroundColor
                                });
 
                                try {
                                    Object.defineProperty(itm, 'style', {
                                        value: new Proxy(itm.style, styleProxy),
                                        enumerable: true
                                    });
                                } catch (e) {
                                    console.log('Unable to protect style property.', e);
                                }
 
                                if (protectedElems)
                                    protectedElems.set(itm, _getAttribute.call(itm, 'style'));
 
                                _setAttribute.call(itm, 'style', result.join(';'));
                            }
                        }
                        if (itm.tagName ==='A' &&
                            (itm.offsetWidth > 0.95 * width() ||
                             itm.offsetHeight > 0.85 * height()))
                        {
                            if (protectedElems)
                                protectedElems.set(itm, _getAttribute.call(itm, 'style'));
 
                            _setAttribute.call(itm, 'style', 'display:none!important');
                        }
                    }
 
                    for (let itm of document.querySelectorAll('ASIDE>DIV'))
                        if ( ((itm.querySelector('script, iframe, a[href*="/ad/www/"]') ||
                               itm.querySelector('img[src$=".gif"]:not([height="0"]), img[height="400"]')) &&
                              !itm.classList.contains('post') ) || !itm.childNodes.length )
                            remove(itm);
 
                    document.body.setAttribute('style', (document.body.getAttribute('style')||'')+';background-color:#E6E7E9!important');
 
                    // display content of the page
                    afterClean();
                }
            );
        }
    };
 
    scripts['allmovie.pro'] = {
        other: ['rufilmtv.org'],
        dom: function()
        {
            // pretend to be Android to make site use different played for ads
            if (isSafari)
                return;
            Object.defineProperty(navigator, 'userAgent', {
                get: function(){ return 'Mozilla/5.0 (Linux; Android 4.1.1; Nexus 7 Build/JRO03D) AppleWebKit/535.19 (KHTML, like Gecko) Chrome/18.0.1025.166 Safari/535.19'; },
                enumerable: true
            });
        }
    };
 
    scripts['anidub-online.ru'] = {
        other: ['online.anidub.com'],
        dom: function()
        {
            if (win.ogonekstart1)
                win.ogonekstart1 = () => console.log("Fire in the hole!");
        },
        now: () => createStyle([
            '.background {background: none!important;}',
            '.background > script + div,'+
            '.background > script ~ div:not([id]):not([class]) + div[id][class]'+
            '{display:none!important}'
        ])
    };
 
    scripts['drive2.ru'] = () => gardener('.c-block:not([data-metrika="recomm"]),.o-grid__item', />Реклама<\//i);
 
    scripts['fishki.net'] = () => gardener('.drag_list > .drag_element, .list-view > .paddingtop15, .post-wrap', /543769|Новости\sпартнеров/);
 
    scripts['gidonline.club'] = {
        now: () => createStyle('.tray > div[style] {display: none!important}')
    };
 
    scripts['hdgo.cc'] = {
        other: ['46.30.43.38', 'couber.be'],
        now: () => (new MutationObserver(
            function(ms)
            {
                let m, node;
                for (m of ms) for (node of m.addedNodes)
                    if (node.tagName === 'SCRIPT' && _getAttribute.call(node, 'onerror') !== null)
                        node.removeAttribute('onerror');
            }
        )).observe(document, { childList:true, subtree: true })
    };
 
    scripts['gismeteo.ru'] = {
        other: ['gismeteo.ua'],
        dom: () => gardener('div > a[target^="_"]', /Яндекс\.Директ/i, { root: 'body', observe: true, parent: 'div[class*="frame"]'})
    };
 
    scripts['hdrezka.me'] = {
        now: function()
        {
            Object.defineProperty(win, 'fuckAdBlock', {
                value: { onDetected: () => console.log('Pretending to be an ABP detector.') },
                enumerable: true
            });
            Object.defineProperty(win, 'ab', {
                value: false,
                enumerable: true
            });
        },
        dom: () => gardener('div[id][onclick][onmouseup][onmousedown]', /onmouseout/i)
    };
 
    scripts['imageban.ru'] = {
        now: preventBackgroundRedirect,
        dom: () => win.addEventListener(
            'unload', function()
            {
                window.location.hash = 'x'+Math.random().toString(36).substr(2);
            }, true
        )
    };
 
    scripts['mail.ru'] = {
        // Trick to prevent mail.ru from removing 3rd-party styles
        now: () => scriptLander(
            () => Object.defineProperty(Object.prototype, 'restoreVisibility', {
                get: () => (() => null),
                set: () => null
            })
        )
    };
 
    scripts['megogo.net'] = {
        now: function()
        {
            Object.defineProperty(win, "adBlock", {
                get: () => false,
                set: () => null,
                enumerable : true
            });
            Object.defineProperty(win, "showAdBlockMessage", {
                get: () => (() => null),
                set: () => null,
                enumerable: true
            });
        }
    };
 
    scripts['naruto-base.su'] = () => gardener('div[id^="entryID"],.block', /href="http.*?target="_blank"/i);
 
    scripts['overclockers.ru'] = {
        now: function()
        {
            createStyle('.fixoldhtml {display:block!important}');
            if (!isChrome && !isOpera)
                return; // Looks like my code works only in Chrome-like browsers
            let noContentYet = true;
            function jWrap()
            {
                win.$ = new Proxy(
                    win.$, {
                        apply: function(_$, _this, args)
                        {
                            let _ret = _$.apply(_this, args);
                            if (_ret[0] === document.body)
                                _ret.html = () => console.log('Anti-adblock prevented.');
                            return _ret;
                        }
                    }
                );
                win.jQuery = win.$;
            }
            (function jReady()
             {
                if (!win.$ && noContentYet)
                    setTimeout(jReady, 0);
                else
                    jWrap();
            })();
            document.addEventListener ('DOMContentLoaded', () => (noContentYet = false), false);
        }
    };
    scripts['forums.overclockers.ru'] = {
        now: function()
        {
            createStyle('.needblock {position: fixed; left: -10000px}');
            Object.defineProperty(win, 'adblck', {
                get: () => 'no',
                set: () => null,
                enumerable: true
            });
        }
    };
 
    scripts['pb.wtf'] = {
        other: ['piratbit.org', 'piratbit.ru'],
        dom: function()
        {
            createStyle('.reques,#result,tbody.row1:not([id]) {display: none !important}');
            // image in the slider in the header
            gardener('a[href^="/ex"],a[href$="=="]', /img/i, {root:'.release-navbar', observe:true, parent:'div'});
            // ads in blocks on the page
            gardener('a[href^="/topic/234257"]', /Как\sразместить/i, {siblings:-1, root:'#main_content', observe:true, parent:'span[style]'});
            // line above topic content
            gardener('.re_top1', /./, {root:'#main_content', parent:'.hidden-sm'});
        }
    };
 
    scripts['pikabu.ru'] = () => gardener('.story', /story__sponsor|story__gag|profile\/ads"/i, {root: '.inner_wrap', observe: true});
 
    scripts['qrz.ru'] = {
        now: function()
        {
            Object.defineProperty(win, 'ab', {
                get:()=>false,
                set:()=>null
            });
            Object.defineProperty(win, 'tryMessage', {
                get:()=>(()=>null),
                set:()=>null
            });
        }
    };
 
    scripts['razlozhi.ru'] = {
        now: function()
        {
            for (let func of ['createShadowRoot', 'attachShadow'])
                if (func in Element.prototype)
                    Element.prototype[func] = function(){ return this.cloneNode(); };
        }
    };
 
    scripts['rp5.ru'] = {
        other: ['rp5.by', 'rp5.kz', 'rp5.ua'],
        dom: function()
        {
            createStyle('#bannerBottom {display: none!important}');
            let co = document.querySelector('#content');
            if (!co)
                return;
            let nodes = co.parentNode.childNodes,
                i = nodes.length;
            while (i--)
                if (nodes[i] !== co)
                    nodes[i].parentNode.removeChild(nodes[i]);
        }
    };
 
    scripts['rustorka.com'] = {
        other: ['rumedia.ws'],
        now: function()
        {
            createStyle('.header > div:not(.head-block) a, #sidebar1 img, #logo img {opacity:0!important}', {
                id: 'tempHidingStyles'
            }, true);
            preventPopups();
        },
        dom: function()
        {
            for (let o of document.querySelectorAll('IMG, A'))
                if ((o.clientWidth === 728 && o.clientHeight === 90) ||
                    (o.clientWidth === 300 && o.clientHeight === 250))
                {
                    while (o && o.tagName !== 'A')
                        o = o.parentNode;
                    if (o)
                        _setAttribute.call(o, 'style', 'display: none !important');
                }
            let s = document.querySelector('#tempHidingStyles');
            s.parentNode.removeChild(s);
        }
    };
 
    scripts['sport-express.ru'] = () => gardener('.js-relap__item',/>Реклама\s+<\//, {root:'.container', observe: true});
 
    scripts['sports.ru'] = function()
    {
        gardener('.aside-news-list__item', /aside-news-list__advert/i, {root:'.columns-layout__left', observe: true});
        gardener('.material-list__item', /Реклама/i, {root:'.columns-layout', observe: true});
        // extra functionality: shows/hides panel at the top depending on scroll direction
        createStyle([
            '.user-panel__fixed { transition: top 0.2s ease-in-out!important; }',
            '.user-panel-up { top: -40px!important }'
        ], {id: 'userPanelSlide'}, false);
        (function lookForPanel()
         {
            let panel = document.querySelector('.user-panel__fixed');
            if (!panel)
                setTimeout(lookForPanel, 100);
            else
                window.addEventListener(
                    'wheel', function(e)
                    {
                        if (e.deltaY > 0 && !panel.classList.contains('user-panel-up'))
                            panel.classList.add('user-panel-up');
                        else if (e.deltaY < 0 && panel.classList.contains('user-panel-up'))
                            panel.classList.remove('user-panel-up');
                    }, false
                );
        })();
    };
 
    scripts['vk.com'] = () => gardener('div[data-post-id]', /wall_marked_as_ads/, {root: '#page_wall_posts', observe: true});
 
    scripts['yap.ru'] = {
        other: ['yaplakal.com'],
        dom: function()
        {
            gardener('form > table[id^="p_row_"]:nth-of-type(2)', /member1438|Administration/);
            gardener('.icon-comments', /member1438|Administration|\/go\/\?http/, {parent:'tr', siblings:-2});
        }
    };
 
    scripts['rambler.ru'] = {
        other: ['championat.com','gazeta.ru','lenta.ru'],
        now: () => scriptLander(
            function()
            {
                let loadMap = new WeakMap();
                Object.defineProperty(HTMLElement.prototype, 'onload', {
                    set: function(func)
                    {
                        let wrap = loadMap.get(this),
                            isContent = /\{\s*content\s*:\s*"[^"]+"/i;
                        if (wrap)
                        {
                            this.removeEventListener('load', wrap, false);
                            loadMap.delete(wrap);
                            loadMap.delete(this);
                        }
 
                        if (!func || !(func instanceof Function))
                            return null;
 
                        wrap = function(e)
                        {
                            let r = (e.target && e.target.sheet) ? e.target.sheet.cssRules : null;
                            if (r && r[0] && r[0].cssText && isContent.test(r[0].cssText))
                            {
                                console.log('Blocked "onload" for', e.target.href);
                                return false;                                        
                            }
                            return func.apply(this, arguments);
                        };
                        loadMap.set(this, wrap);
                        loadMap.set(wrap, func);
                        this.addEventListener('load', wrap, false);
 
                        return func;
                    },
                    get: function()
                    {
                        return loadMap.has(this) ? loadMap.get(this) : null;
                    },
                    enumberable: true
                });
            }
        )
    };
 
    scripts['reactor.cc'] = {
        other: ['joyreactor.cc', 'pornreactor.cc'],
        now: function()
        {
            win.open = (function(){ throw new Error('Redirect prevention.'); }).bind(window);
        },
        click: function(e)
        {
            let node = e.target;
            if (node.nodeType === Node.ELEMENT_NODE &&
                node.style.position === 'absolute' &&
                node.style.zIndex > 0)
                node.parentNode.removeChild(node);
        },
        dom: function()
        {
            let words = new RegExp(
                'блокировщика рекламы'
                .split('')
                .map(function(e){return e+'[\u200b\u200c\u200d]*';})
                .join('')
                .replace(' ', '\\s*')
                .replace(/[аоре]/g, function(e){return ['[аa]','[оo]','[рp]','[еe]']['аоре'.indexOf(e)];}),
                'i'),
                can;
            function deeper(spider)
            {
                let c, l, n;
                if (words.test(spider.innerText))
                {
                    if (spider.nodeType === Node.TEXT_NODE)
                        return true;
                    c = spider.childNodes;
                    l = c.length;
                    n = 0;
                    while(l--)
                        if (deeper(c[l]), can)
                            n++;
                    if (n > 0 && n === c.length && spider.offsetHeight < 750)
                        can.push(spider);
                    return false;
                }
                return true;
            }
            function probe()
            {
                if (words.test(document.body.innerText))
                {
                    can = [];
                    deeper(document.body);
                    let i = can.length, spider;
                    while(i--) {
                        spider = can[i];
                        if (spider.offsetHeight > 10 && spider.offsetHeight < 750)
                            _setAttribute.call(spider, 'style', 'background:none!important');
                    }
                }
            }
            (new MutationObserver(probe))
                .observe(document, { childList:true, subtree:true });
        }
    };
 
    scripts['auto.ru'] = function()
    {
        let words = /Реклама|Яндекс.Директ|yandex_ad_/;
        let userAdsListAds = (
            '.listing-list > .listing-item,'+
            '.listing-item_type_fixed.listing-item'
        );
        let catalogAds = (
            'div[class*="layout_catalog-inline"],'+
            'div[class$="layout_horizontal"]'
        );
        let otherAds = (
            '.advt_auto,'+
            '.sidebar-block,'+
            '.pager-listing + div[class],'+
            '.card > div[class][style],'+
            '.sidebar > div[class],'+
            '.main-page__section + div[class],'+
            '.listing > tbody'
        );
        gardener(userAdsListAds, words, {root:'.listing-wrap', observe:true});
        gardener(catalogAds, words, {root:'.catalog__page,.content__wrapper', observe:true});
        gardener(otherAds, words);
    };
 
    scripts['rsload.net'] = {
        load: function()
        {
            let dis = document.querySelector('label[class*="cb-disable"]');
            if (dis)
                dis.click();
        },
        click: function(e)
        {
            let t = e.target;
            if (t && t.href && (/:\/\/\d+\.\d+\.\d+\.\d+\//.test(t.href)))
                t.href = t.href.replace('://','://rsload.net:rsload.net@');
        }
    };
 
    let domain, name;
    // add alternate domain names if present
    for (name in scripts) if (scripts[name].other)
        for (domain of scripts[name].other) if (!(domain in scripts))
            scripts[domain] = scripts[name];
    // look for current domain in the list and run appropriate code
    domain = document.domain;
    while (domain.indexOf('.') > -1)
    {
        if (domain in scripts)
        {
            if (typeof scripts[domain] === 'function')
            {
                document.addEventListener ('DOMContentLoaded', scripts[domain], false);
                break;
            }
            for (name in scripts[domain])
                switch(name)
                {
                    case 'other':
                        break;
                    case 'now':
                        scripts[domain][name]();
                        break;
                    case 'load':
                        window.addEventListener('load', scripts[domain][name], false);
                        break;
                    case 'dom':
                        document.addEventListener('DOMContentLoaded', scripts[domain][name], false);
                        break;
                    default:
                        document.addEventListener (name, scripts[domain][name], false);
                }
        }
        domain = domain.slice(domain.indexOf('.') + 1);
    }
})();