Translate selected text into another language using the DeepL API.
// ==UserScript==
// @license MIT
// @name Smart Translate with DeepL API
// @namespace http://tampermonkey.net/
// @version 1.3.0
// @description Translate selected text into another language using the DeepL API.
// @author Twil3akine
// @match *://*/*
// @match file:///*
// @match ftp://*/*
// @include myapp://*
// @connect *
// @grant GM_xmlhttpRequest
// @grant GM_getValue
// @grant GM_setValue
// ==/UserScript==
(function () {
'use strict';
// APIキーを取得または保存
const getApiKey = async () => {
let apiKey = await GM_getValue('DEEPL_API_KEY', null);
if (!apiKey) {
apiKey = prompt('Enter your DeepL API key:');
if (apiKey) {
await GM_setValue('DEEPL_API_KEY', apiKey);
} else {
alert('API key is required to use this script.');
}
}
return apiKey;
};
const requestLanguage = async () => {
const normalize = (str) => {
return str.replace(/[Ａ-Ｚａ-ｚ]/g, (match) => {
return String.fromCharCode(match.charCodeAt(0) - 0xFEE0);
});
}
const langMap = {
"arabic": "AR",
"bulgarian": "BG",
"czech": "CS",
"danish": "DA",
"german": "DE",
"greek": "EL",
"english": "EN",
"english-british": "EN-GB",
"english-american": "EN-US",
"spanish": "ES",
"estonian": "ET",
"finnish": "FI",
"french": "FR",
"hungarian": "HU",
"indonesian": "ID",
"italian": "IT",
"japanese": "JA",
"korean": "KO",
"lithuanian": "LT",
"latvian": "LV",
"norwegian-bokmaal": "NB",
"dutch": "NL",
"polish": "PL",
"portuguese": "PT",
"portuguese-brazilian": "PT-BR",
"portuguese-european": "PT-PT",
"romanian": "RO",
"russian": "RU",
"slovak": "SK",
"slovenian": "SL",
"swedish": "SV",
"turkish": "TR",
"ukrainian": "UK",
"chinese": "ZH",
"chinese-simplified": "ZH-HANS",
"chinese-traditional": "ZH-HANT"
};
const input = await new Promise((resolve) => {
const userInput = prompt('Please enter the target language for translation (e.g., English, Japanese)');
resolve(userInput);
});
const formatText = normalize(input);
// 入力があれば、対応する言語コードを返す
const langCode = langMap[formatText.toLowerCase()];
if (langCode) {
return langCode;
} else {
alert('Invalid language entered. Defaulting to Japanese.');
}
return 'JA';
};
const translateText = async (text, lang) => {
const apiKey = await getApiKey();
if (!apiKey) return;
const url = 'https://api-free.deepl.com/v2/translate';
const params = {
auth_key: apiKey,
text: text,
target_lang: lang,
};
GM_xmlhttpRequest({
method: 'POST',
url: url,
headers: {
'Content-Type': 'application/x-www-form-urlencoded',
},
data: new URLSearchParams(params).toString(),
onload: (response) => {
try {
const result = JSON.parse(response.responseText);
const translatedText = result.translations[0].text;
alert(`${text}\n\n->\n\n${translatedText}`);
console.log(`${text}\n\n->\n\n${translatedText}`);
} catch (e) {
console.error('Error parsing the response from DeepL:', e);
alert('An error occurred while processing the translation.');
}
},
onerror: (error) => {
console.error('Error with DeepL API request:', error);
alert('Error occurred while translating. Please try again later.');
},
});
};
console.log('Smart-Translate is started!');
document.addEventListener('keydown', async (event) => {
if (event.altKey && event.key === 't') {
const selectedText = window.getSelection().toString().trim();
if (selectedText) {
await translateText(selectedText, 'JA');
} else {
alert('Please select text!');
}
}
if (event.altKey && event.key === 'T') {
const selectedText = window.getSelection().toString().trim();
if (selectedText) {
const selectLanguage = await requestLanguage();
await translateText(selectedText, selectLanguage);
} else {
alert('Please select text!');
}
}
if (event.altKey && event.key === 'r') {
const apiKey = await getApiKey();
const newKey = prompt(`Please input your new API key\nNow API key: ${apiKey}`);
if (newKey) {
await GM_setValue('DEEPL_API_KEY', newKey);
alert('API key updated successfully.');
}
}
});
})();