☰

Web Search Result Domain Filter

Filter search result based on domain names on web search of Bing, DuckDuckGo, Google, Yahoo. Some include search for news, books, etc. All exclude search for images and videos.

As of 06/04/2017. See the latest version.

// ==UserScript==
// @name        Web Search Result Domain Filter
// @namespace   WebSearchResultDomainFilter
// @description Filter search result based on domain names on web search of Bing, DuckDuckGo, Google, Yahoo. Some include search for news, books, etc. All exclude search for images and videos.
// @author      jcunews
// @include     *://www.bing.com/search*
// @include     *://www.bing.com/news/search*
// @include     *://duckduckgo.com/*
// @include     *://www.google.*/search*
// @include     *://www.google.*.*/search*
// @include     *://search.yahoo.com/yhs/search*
// @include     *://*.search.yahoo.com/search*
// @version     1.0.0
// @grant       none
// ==/UserScript==

(function() {
  var filter = JSON.parse(localStorage.WebSearchResultDomainFilter || "[]");
  var rx = filter.join("|").replace(/\./g, "\\.");
  rx = rx ? (new RegExp(filter.join("|").replace(/\./g, "\\."))) : null;
  var getItems, getHostName, itemSelector, itemLinkSelector, setupEditFilterLink, cssPatch = "";
  var items, ele, i, j, excLink = document.createElement("DIV"), link;
  var createFilterLink, filterEditor = document.createElement("DIV");

  function trim(s) {
    return s.replace(/^(\s+|\r+|\n+)|(\s+|\r+|\n+)$/g, "");
  }
  function updateFilter() {
    localStorage.WebSearchResultDomainFilter = JSON.stringify(filter);
    rx = filter.join("|").replace(/\./g, "\\.");
    rx = rx ? (new RegExp(filter.join("|").replace(/\./g, "\\."))) : null;
  }
  function abortEvent(ev) {
    ev.preventDefault();
    if (ev.stopPropagation) ev.stopPropagation();
    if (ev.stopImmediatePropagation) ev.stopImmediatePropagation();
  }
  function processItems() {
    var items = document.querySelectorAll(itemSelector), i, link, lnk;
    if (getItems) {
      items = getItems();
    } else items = document.querySelectorAll(itemSelector);
    for (i = items.length-1; i >= 0; i--) {
      link = items[i].querySelector(itemLinkSelector);
      if (!link) continue;
      if (!link.parentNode.querySelector(".domainFilterLink")) {
        lnk = excLink.cloneNode(true);
        lnk.addEventListener("click", function(ev) {
          var hn = getHostName(this.parentNode.querySelector("A"));
          if (!confirm('Do you want to hide all search result from below domain name?\n\n' + hn + '\n\nNote:\nSubdomain is not included.\ni.e. hiding "abc.com" will not hide "sub.abc.com" or vice versa.')) return
          filter.push(hn);
          updateFilter();
          processItems();
          abortEvent(ev);
        }, true);
        link.parentNode.appendChild(lnk);
      }
      if (rx) {
        items[i].style.display = rx.test(getHostName(link)) ? "none" : "";
      } else items[i].style.display = "";
    }
  }

  if ((/www\.bing\.com\/search/).test(location.href)) {
    itemSelector = "#b_results .b_algo";
    itemLinkSelector = "h2 > a";
    createFilterLink = function() {
      editFilterLink = document.createElement("A");
      editFilterLink.style.marginLeft = "3ex";
      return b_tween.appendChild(editFilterLink);
    };
    cssPatch = '#b_results{width:580px}';
  } else
  if ((/www\.bing\.com\/news\/search/).test(location.href)) {
    itemSelector = "#algocore .newsitem";
    itemLinkSelector = ".title";
    createFilterLink = function() {
      editFilterLink = document.createElement("A");
      editFilterLink.style.cssText = 'float:left;margin:.85em 0 0 3ex';
      var ele = document.querySelector(".nf .menu > ul");
      return ele.appendChild(editFilterLink);
    };
    cssPatch = '.search .newsitem .caption a.title{display:inline!important}';
  } else
  if ((/duckduckgo\.com/).test(location.hostname)) {
    itemSelector = "#links .result";
    itemLinkSelector = ".result__title > a";
    createFilterLink = function() {
      var ele = document.querySelector(".organic-filters");
      if (!ele || !ele.childElementCount) return;
      editFilterLink = document.createElement("A");
      return ele.appendChild(editFilterLink);
    };
    cssPatch = '#b_results{width:580px}';
    if (window.nrn) {
      window._nrn = window.nrn;
      window.nrn = function() {
        var res = window._nrn.apply(this, arguments);
        processItems();
        return res;
      };
    }
  } else
  if ((/www\.google\./).test(location.hostname)) {
    itemSelector = "#rso .g";
    itemLinkSelector = ".r a";
    createFilterLink = function() {
      editFilterLink = document.createElement("A");
      editFilterLink.style.marginLeft = "10ex";
      return resultStats.appendChild(editFilterLink);
    };
  } else
  if ((/search\.yahoo\.com/).test(location.hostname)) {
    itemLinkSelector = ".title > a, h4 > a";
    getItems = function() {
      return Array.prototype.slice.call(document.querySelectorAll(".searchCenterMiddle > li, .compArticleList > li")).filter(
        function(v) {
          return !(/\bsys_/).test(v.firstElementChild.className);
        }
      );
    };
    createFilterLink = function() {
      editFilterLink = document.createElement("A");
      if (window["refiner-time"]) {
        editFilterLink.style.cssText = 'margin-left:6ex';
        return window["refiner-time"].appendChild(editFilterLink);
      } else {
        var ele = document.querySelector("#sidebar .bd");
        return ele.appendChild(editFilterLink);
      }
    };
    cssPatch = '.search .newsitem .caption a.title{display:inline!important}';
    getHostName = function(link) {
      var a = unescape(link.href).match(/\/RU=(http.*?)\/R[A-Z]=/);
      if (a) {
        a = a[1].match(/\/\/(.*?)\//)[1];
      } else a = link.hostname;
      return a;
    };
  }
  if (!(getItems || itemSelector)) return;
  if (!getHostName) {
    getHostName = function(link) {
      return link.hostname;
    };
  }

  filterEditor.id = "filterEditor";
  filterEditor.innerHTML = '\
<style>' + cssPatch + '\
.domainFilterLink{display:inline-block;margin-left:1ex;border-radius:4px;padding:0 .5ex;background-color:#d00;color:#fff;font-size:10pt;font-weight:bold;cursor:pointer}\
#domainFilterEditLink{cursor:pointer}\
#domainFilterEditor{display:none;position:fixed;z-index:999;left:33%;top:20%;right:33%;border-radius:5px;padding:15px;background-color:#ccc}\
#domainFilterEditor textarea{margin-bottom:15px;width:100%;min-width:100%;max-width:100%;height:20em;min-height:5em;max-height:30em;box-sizing:border-box}\
#domainFilterEditor div{padding:.3em 1ex;background-color:#000;color:#fff;font-weight:bold}\
#domainFilterEditor table{width:100%;text-align:center}\
#domainFilterEditor button{width:10ex}\
</style>\
<div id="domainFilterEditor">\
  <style></style>\
  <div>Edit Domain Filter</div>\
  <textarea id="domainFilterEditorEdit"></textarea>\
  <table><tr>\
    <td><button id="domainFilterEditorOk">OK</button></td>\
    <td><button id="domainFilterEditorCancel">Cancel</button></td>\
  </tr></table>\
</div>\
';
  document.body.appendChild(filterEditor);
  domainFilterEditorOk.addEventListener("click", function(ev) {
    var txt = trim(domainFilterEditorEdit.value);
    filter = txt.split("\n").reduce(function(prev, cur) {
      cur = trim(cur);
      if (cur) prev.push(cur);
      return prev;
    }, []);
    updateFilter();
    processItems();
    domainFilterEditor.firstElementChild.innerHTML = "";
    abortEvent(ev);
  }, true);
  domainFilterEditorCancel.addEventListener("click", function(ev) {
    domainFilterEditor.firstElementChild.innerHTML = "";
    abortEvent(ev);
  }, true);

  excLink.textContent = "X";
  excLink.title = "Exclude this domain name from search result";
  excLink.className = "domainFilterLink";

  (function addEditFilterLink() {
    if (editFilterLink = createFilterLink()) {
      editFilterLink.textContent = "Edit Domain Filter";
      editFilterLink.title = "Edit search result domain filter";
      editFilterLink.id = "domainFilterEditLink";
      editFilterLink.addEventListener("click", function(ev) {
        var txt = filter.join("\n");
        domainFilterEditorEdit.value = txt + (txt ? "\n" : "");
        domainFilterEditor.firstElementChild.innerHTML = '\
body>*{display:none!important}\
#filterEditor{display:block!important}\
#domainFilterEditor{display:block}\
';
        abortEvent(ev);
      }, true);
      processItems();
    } else setTimeout(addEditFilterLink, 1000);
  })();

})();