Automatically detects the language used based on the information in the source code comments and selects it as the one to be submitted.
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// ==UserScript==
// @name AtCoder Submission Language Detector
// @namespace https://twitter.com/KakurenboUni
// @version 1.0.0
// @description Automatically detects the language used based on the information in the source code comments and selects it as the one to be submitted.
// @author uni-kakurenbo
// @match https://atcoder.jp/contests/*/tasks/*
// @match https://atcoder.jp/contests/*/submit*
// @license MIT
// @supportURL https://twitter.com/KakurenboUni
// ==/UserScript==
(async function () {
"use strict";
const DETECTION_REG_EXP = /#.*lang(?:uage)?:?(?<args>\s+[^\n\r*/#]+)/;
await rendered();
const $editor = $(".editor").data("editor").doc;
const $plainTextarea = $(".plain-textarea");
const $selectLanguage = $("#select-lang select");
const $languageOptions = $selectLanguage[0].querySelectorAll("option");
const languageOptions = [].map.call($languageOptions, ({ value, label, dataset: { mime } = {} }) => {
return {
id: value,
label: label.toLowerCase() ?? "",
code: mime?.toLowerCase().replaceAll(/^.+\/x?|src$/g, "") ?? "",
};
});
$editor.on("change", updateLanguageSettings);
$plainTextarea.on("input", updateLanguageSettings);
document.addEventListener("paste", updateLanguageSettings);
$("#input-open-file").on("change", () => { setTimeout(updateLanguageSettings, 0); });
function updateLanguageSettings() {
const sourceCode = getSourceCode();
const languageInfomation = sourceCode.match(DETECTION_REG_EXP);
if (!languageInfomation || !languageInfomation?.groups?.args) return;
let languageSelectors = languageInfomation.groups.args?.trim().replace(/\s+/g, " ").split(" ");
languageSelectors = languageSelectors.map((selector) => selector.toLowerCase());
const selectedOption = languageOptions.find((option) => {
return (
languageSelectors.includes(option.id) ||
languageSelectors.every((selector) => option.label.includes(selector)) ||
languageSelectors.every((selector) => option.code.includes(selector))
);
});
if (!selectedOption) return;
$selectLanguage.val(selectedOption.id).trigger("change");
}
async function rendered() {
let timer;
await new Promise((resolve) => {
observer();
function observer() {
if (typeof CodeMirror == "function") {
resolve();
}
timer = setTimeout(observer, 10);
}
});
clearTimeout(timer);
}
})();