// ==UserScript==
// @name Duolingo input language switcher
// @namespace https://www.duolingo.com/IVrL9
// @author T1mL3arn
// @match https://www.duolingo.com/*
// @match https://www.example.com/*
// @match https://example.com/*
// @version 1.4.1
// @description This script allows you to type letters appropriate for current task without changing keyboard's layout
// @run-at document-start
// @grant none
// @license GPLv3
// @homepageURL https://github.com/T1mL3arn/Duolingo-input-language-switcher
// @supportURL https://greasyfork.org/en/scripts/37693-duolingo-input-language-switcher/feedback
// @downloadURL none
// ==/UserScript==//// Generated by Haxe 3.4.7
(function () { "use strict";
var HxOverrides = function() { };
HxOverrides.substr = function(s,pos,len) {
	if(len == null) {
		len = s.length;
	} else if(len < 0) {
		if(pos == 0) {
			len = s.length + len;
		} else {
			return "";
		}
	}
	return s.substr(pos,len);
};
var Main = function() {
	this.document = window.document;
	this.console = { };
	this.initLanguages();
	if(this.document.readyState == "interactive" || this.document.readyState == "complete") {
		this.onready();
	} else {
		this.document.addEventListener("DOMContentLoaded",$bind(this,this.onready));
	}
};
Main.main = function() {
	new Main();
};
Main.prototype = {
	initLanguages: function() {
		this.keyCodes = ["Backquote","Digit1","Digit2","Digit3","Digit4","Digit5","Digit6","Digit7","Digit8","Digit9","Digit0","Minus","Equal","Backslash","KeyQ","KeyW","KeyE","KeyR","KeyT","KeyY","KeyU","KeyI","KeyO","KeyP","BracketLeft","BracketRight","KeyA","KeyS","KeyD","KeyF","KeyG","KeyH","KeyJ","KeyK","KeyL","Semicolon","Quote","KeyZ","KeyX","KeyC","KeyV","KeyB","KeyN","KeyM","Comma","Period","Slash"];
		this.languages = { };
		this.languages.ru = "ё1234567890-=\\йцукенгшщзхъфывапролджэячсмитьбю.Ё!\"№;%:?*()_+/ЙЦУКЕНГШЩЗХЪФЫВАПРОЛДЖЭЯЧСМИТЬБЮ,";
		this.languages.en = "`1234567890-=\\qwertyuiop[]asdfghjkl;'zxcvbnm,./~!@#$%^&*()_+|QWERTYUIOP{}ASDFGHJKL:\"ZXCVBNM<>?";
		var len = this.languages.ru.length;
		var _g = 0;
		var _g1 = Reflect.fields(this.languages);
		while(_g < _g1.length) {
			var f = _g1[_g];
			++_g;
			var act = this.languages[f].length;
			if(act != len) {
				this.console.error("LangString test failed: expected len " + len + "; actual len " + act + "; lang name " + f);
				this.console.error(this.languages[f]);
				return;
			}
			if(act != this.keyCodes.length * 2) {
				this.console.error("KeyCodes and LangString test failed: expected lang string len " + this.keyCodes.length * 2 + "; actual len " + act + "; lang name " + f);
				return;
			}
		}
	}
	,onready: function(e) {
		this.document.removeEventListener("DOMContentLoaded",$bind(this,this.onready));
		this.console.log("Duolingo input switcher is ready");
		window.document.body.addEventListener("keypress",$bind(this,this.onKeyPress));
		window.document.body.addEventListener("keydown",$bind(this,this.refocus));
	}
	,onKeyPress: function(e) {
		if(e.ctrlKey) {
			return;
		}
		var sourceElt = e.target;
		if(this.isInput(sourceElt)) {
			var challengeType = sourceElt.dataset.test;
			switch(challengeType) {
			case "challenge-listen-input":case "challenge-listentap-input":case "challenge-name-input":
				this.setLanguagePair("en","ru");
				break;
			case "challenge-translate-input":
				this.nativeLanguage = "ru";
				this.foreignLanguage = "en";
				var lang = sourceElt.getAttribute("lang");
				if(lang == this.nativeLanguage) {
					this.setLanguagePair("ru","en");
				} else if(lang == this.foreignLanguage) {
					this.setLanguagePair("en","ru");
				}
				break;
			default:
				return;
			}
			var targetLangStr = this.languages[this.targetLanguage];
			var keyCodeInd = this.keyCodes.indexOf(e.code);
			if(keyCodeInd != -1) {
				var targetChar = e.shiftKey ? targetLangStr.charAt(keyCodeInd + this.keyCodes.length) : targetLangStr.charAt(keyCodeInd);
				var input = sourceElt;
				window.setTimeout($bind(this,this.replaceChar),1,input,targetChar,input.selectionStart);
			}
		}
	}
	,isInput: function(elt) {
		if(elt.tagName != "TEXTAREA") {
			if(elt.tagName == "INPUT") {
				return elt.getAttribute("type") == "text";
			} else {
				return false;
			}
		} else {
			return true;
		}
	}
	,setLanguagePair: function(target,source) {
		this.targetLanguage = target;
		this.sourceLanguage = source;
	}
	,refocus: function(e) {
		if(this.isInput(e.target)) {
			if(e.keyCode == 13 || e.code == "Enter") {
				e.target.blur();
			}
		}
	}
	,replaceChar: function(target,newChar,position) {
		var val = target.value;
		val = val.substring(0,position) + newChar + HxOverrides.substr(val,position + 1,null);
		target.innerText = val;
		target.value = val;
		target.setSelectionRange(position + 1,position + 1);
	}
};
var Reflect = function() { };
Reflect.fields = function(o) {
	var a = [];
	if(o != null) {
		var hasOwnProperty = Object.prototype.hasOwnProperty;
		for( var f in o ) {
		if(f != "__id__" && f != "hx__closures__" && hasOwnProperty.call(o,f)) {
			a.push(f);
		}
		}
	}
	return a;
};
var $_, $fid = 0;
function $bind(o,m) { if( m == null ) return null; if( m.__id__ == null ) m.__id__ = $fid++; var f; if( o.hx__closures__ == null ) o.hx__closures__ = {}; else f = o.hx__closures__[m.__id__]; if( f == null ) { f = function(){ return f.method.apply(f.scope, arguments); }; f.scope = o; f.method = m; o.hx__closures__[m.__id__] = f; } return f; }
Main.main();
})();