// ==UserScript==
// @name        Google Search English Filter
// @name:ja     Google Search English Filter
// @name:zh-CN  Google Search English Filter
// @description Add "Search English pages" option to the language filter on Google search Tools.
// @description:ja Google検索のツールで選べる絞り込み言語として、英語を追加します。
// @description:zh-CN 作为可以通过Google搜索工具选择的缩小语言，追加英语。
// @namespace   knoa.jp
// @include     https://www.google.*/search?*
// @version     1.1.2
// @grant       none
// ==/UserScript==
(function(){
const SCRIPTID = 'GoogleSearchEnglishFilter';
const SCRIPTNAME = 'Google Search English Filter';
const DEBUG = false;/*
[update] 1.1.2
Minor fix.
[bug]
[todo]
言語設定で複数選んでいると「日本語のページを検索」が「英語と日本語のページを検索」になるので、日本語だけが選べない
langコードを取得して、ラベルは取得できないけどうまいことやるしかないか
[possible]
[memo]
https://www.google.com/search?q=google&client=firefox-b&sxsrf=ACYBGNTaF1aCsCLcgnQOwwDAo3nGoELowQ:1577943675296&source=lnt&tbs=lr:lang_1ja&lr=lang_ja&sa=X&ved=2ahUKEwif0PahmuTmAhWhGaYKHRCLDE0QpwV6BAgKEBk
https://www.google.com/search?q=test&hl=zh-CN&sxsrf=ACYBGNQ3oa8YIfHamy9rqBV9t5530dg6Nw:1577946432840&source=lnt&tbs=lr:lang_1zh-CN%7Clang_1zh-TW&lr=lang_zh-CN%7Clang_zh-TW&sa=X&ved=2ahUKEwiIhOrEpOTmAhVME6YKHWwjBeoQpwV6BAgLEBk
fetchしてもロケール言語による選択肢は取得できない。
*/
if(window === top && console.time) console.time(SCRIPTID);
const MS = 1, SECOND = 1000*MS, MINUTE = 60*SECOND, HOUR = 60*MINUTE, DAY = 24*HOUR, WEEK = 7*DAY, MONTH = 30*DAY, YEAR = 365*DAY;
const RESET = 'GoogleSearchEnglishFilter_RESET';
const LANGUAGES = [
/* If you edited LANGUAGES, you should search "GoogleSearchEnglishFilter_RESET" on Google to apply your update */
/* https://www.google.com/search?q=GoogleSearchEnglishFilter_RESET */
{code: 'en', label: 'Search English pages',  value: 'lang_en'},
//{code: 'ja', label: 'Search Japanese pages', value: 'lang_ja'},
//{code: 'fr', label: 'Search French pages',   value: 'lang_fr'},
//{code: 'ru', label: 'Search Russian pages',  value: 'lang_ru'},
//{code: 'es', label: 'Search Spanish pages',  value: 'lang_es'},
//{code: 'ar', label: 'Search Arabic pages',   value: 'lang_ar'},
//{code: 'zh-CN_zh-TW', label: 'Search Chinese (Simplified) and Chinese (Traditional) pages', value: 'lang_zh-CN%7Clang_zh-TW'},
//{code: 'zh-CN', label: 'Search Chinese (Simplified) pages',  value: 'lang_zh-CN'},
//{code: 'zh-TW', label: 'Search Chinese (Traditional) pages', value: 'lang_zh-TW'},
];
const LANGUAGEQUERY = /(\?|&)(lr)=([^&]+)/;
const RETRY = 10;
let site = {
targets: {
as: () => $$('#hdtbMenus a[href^="/"]'),/* possible anchors for language selector links */
},
get: {
languageList: () => {/* list parent including any language, Japanese,... */
if(LANGUAGEQUERY.test(location.href) === false){/* not filtered yet */
const option = Array.from(elements.as).find(a => a.href.includes('&lr='));/* such as "Japanese" link */
if(option === undefined) return error('Not found: language option');
const languageList = option.parentNode.parentNode.parentNode;
const anyLanguageText = languageList.firstElementChild.textContent.trim();/* must be "any language" */
Storage.save('anyLanguageText', anyLanguageText);
return languageList;
}
else{
const anyLanguageText = Storage.read('anyLanguageText');
if(!anyLanguageText) return error('Not saved yet: anyLanguageText');
const option = Array.from(elements.as).find(a => a.textContent.includes(anyLanguageText));
const languageList = option.parentNode.parentNode.parentNode;
return languageList;
}
},
languageData: (li) => {
let a = li.querySelector('a[href]'), url = a ? a.href : location.href;
let match = url.match(LANGUAGEQUERY);
if(match === null) return log('LANGUAGEQUERY doesn\'t match.', url);
return {
code:  match[3].replace(/lang_/g, '').replace(/%7C/g, '_'),
label: li.textContent,
value: match[3],
};
},
listItem: (languageList, languageData) => {
let a = languageList.querySelector('a[href]');
if(a === null) return log('a[href] doesn\'t exist.');
let url = [a.href, location.href].find(href => LANGUAGEQUERY.test(href));
if(url === undefined) return log('URL doesn\'t match.');
let li = a.parentNode.parentNode.cloneNode(true), lia = li.querySelector('a[href]');
li.id = SCRIPTID + '-' + languageData.code;
li.dataset.value = languageData.value;
lia.href = url.replace(LANGUAGEQUERY, `$1$2=${languageData.value}`);
lia.textContent = li.dataset.label = languageData.label;
return li;
}
},
is: {
reset: () => location.href.includes(RESET),
},
};
let html, elements = {}, timers = {}, sizes = {};
let languagesData = [];
let core = {
initialize: function(){
html = document.documentElement;
html.classList.add(SCRIPTID);
core.ready();
core.addStyle();
},
ready: function(){
core.getTargets(site.targets, RETRY).then(() => {
log("I'm ready.");
core.readLanguages();
core.getLanguages();
core.addLanguages();
});
},
readLanguages: function(){
/* read the saved preferences */
if(site.is.reset()){
languagesData = LANGUAGES;
alert(`${SCRIPTNAME} has reset.`);
}else{
languagesData = Storage.read('languagesData') || LANGUAGES;
}
},
getLanguages: function(){
let languageList = elements.languageList = site.get.languageList();
/* add dataset for each list items */
Array.from(languageList.children).forEach((li, i) => {
if(i === 0) return;/*any language*/
let languageData = site.get.languageData(li);
li.dataset.code  = languageData.code;
li.dataset.label = languageData.label;
li.dataset.value = languageData.value;
/* get default languages */
if(languagesData.find(l => l.code === languageData.code)) return;
languagesData.splice(i - 1, 0, languageData);/*keep the order of the languages*/
});
/* get and update localized labels */
languagesData.forEach(languageData => {
let li = Array.from(languageList.children).find(li => li.dataset.code === languageData.code);
if(li) languageData.label = li.dataset.label;
});
Storage.save('languagesData', languagesData);
},
addLanguages: function(){
let languageList = elements.languageList;
languagesData.forEach((languageData, i) => {
if(Array.from(languageList.children).some(li => li.dataset.code === languageData.code)) return;
let li = site.get.listItem(languageList, languageData);
languageList.insertBefore(li, languageList.children[i + 1]);
});
},
getTarget: function(selector, retry = 10, interval = 1*SECOND){
const key = selector.name;
const get = function(resolve, reject){
let selected = selector();
if(selected === null || selected.length === 0){
if(--retry) return log(`Not found: ${key}, retrying... (${retry})`), setTimeout(get, interval, resolve, reject);
else return reject(new Error(`Not found: ${selector.name}, I give up.`));
}else{
if(selected.nodeType === Node.ELEMENT_NODE) selected.dataset.selector = key;/* element */
else selected.forEach((s) => s.dataset.selector = key);/* elements */
elements[key] = selected;
resolve(selected);
}
};
return new Promise(function(resolve, reject){
get(resolve, reject);
});
},
getTargets: function(selectors, retry = 10, interval = 1*SECOND){
return Promise.all(Object.values(selectors).map(selector => core.getTarget(selector, retry, interval)));
},
addStyle: function(name = 'style'){
if(core.html[name] === undefined) return;
let style = createElement(core.html[name]());
document.head.appendChild(style);
if(elements[name] && elements[name].isConnected) document.head.removeChild(elements[name]);
elements[name] = style;
},
html: {
style: () => `
<style type="text/css">
[id^="${SCRIPTID}"]:active,
[id^="${SCRIPTID}"]:hover{
background-color: rgba(0,0,0,.1);
}
[id^="${SCRIPTID}"] a{
color: #0c0c0d;
}
g-menu-item:not(:hover){
background-color: white !important;
}
</style>
`,
},
};
const setTimeout = window.setTimeout.bind(window), clearTimeout = window.clearTimeout.bind(window), setInterval = window.setInterval.bind(window), clearInterval = window.clearInterval.bind(window), requestAnimationFrame = window.requestAnimationFrame.bind(window), requestIdleCallback = window.requestIdleCallback.bind(window);
const alert = window.alert.bind(window), confirm = window.confirm.bind(window), prompt = window.prompt.bind(window), getComputedStyle = window.getComputedStyle.bind(window), fetch = window.fetch.bind(window);
if(!('isConnected' in Node.prototype)) Object.defineProperty(Node.prototype, 'isConnected', {get: function(){return document.contains(this)}});
class Storage{
static key(key){
return (SCRIPTID) ? (SCRIPTID + '-' + key) : key;
}
static save(key, value, expire = null){
key = Storage.key(key);
localStorage[key] = JSON.stringify({
value: value,
saved: Date.now(),
expire: expire,
});
}
static read(key){
key = Storage.key(key);
if(localStorage[key] === undefined) return undefined;
let data = JSON.parse(localStorage[key]);
if(data.value === undefined) return data;
if(data.expire === undefined) return data;
if(data.expire === null) return data.value;
if(data.expire < Date.now()) return localStorage.removeItem(key);
return data.value;
}
static delete(key){
key = Storage.key(key);
delete localStorage.removeItem(key);
}
static saved(key){
key = Storage.key(key);
if(localStorage[key] === undefined) return undefined;
let data = JSON.parse(localStorage[key]);
if(data.saved) return data.saved;
else return undefined;
}
}
const $ = function(s, f){
let target = document.querySelector(s);
if(target === null) return null;
return f ? f(target) : target;
};
const $$ = function(s){return document.querySelectorAll(s)};
const createElement = function(html = '<span></span>'){
let outer = document.createElement('div');
outer.innerHTML = html;
return outer.firstElementChild;
};
const observe = function(element, callback, options = {childList: true, attributes: false, characterData: false, subtree: false}){
let observer = new MutationObserver(callback.bind(element));
observer.observe(element, options);
return observer;
};
const log = function(){
if(typeof DEBUG === 'undefined') return;
console.log(...log.build(new Error(), ...arguments));
};
log.build = function(error, ...args){
let l = log.last = log.now || new Date(), n = log.now = new Date();
let line = log.format.getLine(error), callers = log.format.getCallers(error);
//console.log(error.stack);
return [SCRIPTID + ':',
/* 00:00:00.000  */ n.toLocaleTimeString() + '.' + n.getTime().toString().slice(-3),
/* +0.000s       */ '+' + ((n-l)/1000).toFixed(3) + 's',
/* :00           */ ':' + line,
/* caller.caller */ (callers[2] ? callers[2] + '() => ' : '') +
/* caller        */ (callers[1] || '') + '()',
...args
];
};
log.formats = [{
name: 'Firefox Scratchpad',
detector: /MARKER@Scratchpad/,
getLine: (e) => e.stack.split('\n')[1].match(/([0-9]+):[0-9]+$/)[1],
getCallers: (e) => e.stack.match(/^[^@]*(?=@)/gm),
}, {
name: 'Firefox Console',
detector: /MARKER@debugger/,
getLine: (e) => e.stack.split('\n')[1].match(/([0-9]+):[0-9]+$/)[1],
getCallers: (e) => e.stack.match(/^[^@]*(?=@)/gm),
}, {
name: 'Firefox Greasemonkey 3',
detector: /\/gm_scripts\//,
getLine: (e) => e.stack.split('\n')[1].match(/([0-9]+):[0-9]+$/)[1],
getCallers: (e) => e.stack.match(/^[^@]*(?=@)/gm),
}, {
name: 'Firefox Greasemonkey 4+',
detector: /MARKER@user-script:/,
getLine: (e) => e.stack.split('\n')[1].match(/([0-9]+):[0-9]+$/)[1] - 500,
getCallers: (e) => e.stack.match(/^[^@]*(?=@)/gm),
}, {
name: 'Firefox Tampermonkey',
detector: /MARKER@moz-extension:/,
getLine: (e) => e.stack.split('\n')[1].match(/([0-9]+):[0-9]+$/)[1] - 2,
getCallers: (e) => e.stack.match(/^[^@]*(?=@)/gm),
}, {
name: 'Chrome Console',
detector: /at MARKER \(<anonymous>/,
getLine: (e) => e.stack.split('\n')[2].match(/([0-9]+):[0-9]+\)?$/)[1],
getCallers: (e) => e.stack.match(/[^ ]+(?= \(<anonymous>)/gm),
}, {
name: 'Chrome Tampermonkey',
detector: /at MARKER \(chrome-extension:.*?\/userscript.html\?name=/,
getLine: (e) => e.stack.split('\n')[2].match(/([0-9]+):[0-9]+\)?$/)[1] - 1,
getCallers: (e) => e.stack.match(/[^ ]+(?= \(chrome-extension:)/gm),
}, {
name: 'Chrome Extension',
detector: /at MARKER \(chrome-extension:/,
getLine: (e) => e.stack.split('\n')[2].match(/([0-9]+):[0-9]+\)?$/)[1],
getCallers: (e) => e.stack.match(/[^ ]+(?= \(chrome-extension:)/gm),
}, {
name: 'Edge Console',
detector: /at MARKER \(eval/,
getLine: (e) => e.stack.split('\n')[2].match(/([0-9]+):[0-9]+\)$/)[1],
getCallers: (e) => e.stack.match(/[^ ]+(?= \(eval)/gm),
}, {
name: 'Edge Tampermonkey',
detector: /at MARKER \(Function/,
getLine: (e) => e.stack.split('\n')[2].match(/([0-9]+):[0-9]+\)$/)[1] - 4,
getCallers: (e) => e.stack.match(/[^ ]+(?= \(Function)/gm),
}, {
name: 'Safari',
detector: /^MARKER$/m,
getLine: (e) => 0,/*e.lineが用意されているが最終呼び出し位置のみ*/
getCallers: (e) => e.stack.split('\n'),
}, {
name: 'Default',
detector: /./,
getLine: (e) => 0,
getCallers: (e) => [],
}];
log.format = log.formats.find(function MARKER(f){
if(!f.detector.test(new Error().stack)) return false;
//console.log('////', f.name, 'wants', 0/*the exact line number here*/, '\n' + new Error().stack);
return true;
});
const error = function(){
if(typeof DEBUG === 'undefined') return;
let body = Array.from(arguments).join(' ');
if(error.notifications[body]) return;
Notification.requestPermission();
error.notifications[body] = new Notification(SCRIPTNAME, {body: body});
error.notifications[body].addEventListener('click', function(e){
Object.values(error.notifications).forEach(n => n.close());
error.notifications = {};
});
console.error(...log.build(new Error(), ...arguments));
};
error.notifications = {};
core.initialize();
if(window === top && console.timeEnd) console.timeEnd(SCRIPTID);
})();