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AtCoderの問題名をAtCoderの問題名を「ABC123A - Five Antennas」のようなフォーマットでコピーします。
// ==UserScript==
// @name AtCoder Title Copy
// @namespace https://github.com/Fe2O3-Tpa
// @version 1.0.0
// @description AtCoderの問題名をAtCoderの問題名を「ABC123A - Five Antennas」のようなフォーマットでコピーします。
// @match https://atcoder.jp/contests/*/tasks/*
// @grant none
// @license mit
// ==/UserScript==
(function (exports) {
'use strict';
function createCopyButton(options = {}) {
const button = document.createElement('button');
button.type = 'button';
button.className = options.className ?? 'btn btn-default btn-sm';
button.style.marginLeft = options.marginLeft ?? '10px';
button.innerText = options.label ?? 'Copy Title';
return button;
}
async function copyToClipboard(text, button) {
if (typeof text !== 'string' || text.length === 0) {
throw new Error('text must be a non-empty string');
}
if (!(button instanceof HTMLButtonElement)) {
throw new Error('button must be an HTMLButtonElement');
}
if (!('clipboard' in navigator) || navigator.clipboard === undefined) {
throw new Error('Clipboard API is not available');
}
const originalLabel = button.innerText;
await navigator.clipboard.writeText(text);
button.innerText = 'Copied!';
window.setTimeout(() => {
button.innerText = originalLabel;
}, 2000);
}
function getContestId(pathname = window.location.pathname) {
const contestTaskPathPattern = /^\/contests\/([a-z0-9_]+)\/tasks\/([a-z0-9_]+)$/i;
const match = contestTaskPathPattern.exec(pathname);
if (match === null) {
throw new Error(`Failed to parse contest id from pathname: ${pathname}`);
}
const contestId = match[1];
if (typeof contestId !== 'string' || contestId.length === 0) {
throw new Error(`Contest id is missing in pathname: ${pathname}`);
}
return contestId.toUpperCase();
}
function getTaskInfo(root = document) {
const heading = root.querySelector('.h2');
if (!(heading instanceof Element)) {
return null;
}
const textParts = [];
for (const node of Array.from(heading.childNodes)) {
if (node.nodeType !== Node.TEXT_NODE) {
continue;
}
const value = node.nodeValue;
if (typeof value !== 'string') {
continue;
}
const normalized = value.replace(/\s+/g, ' ').trim();
if (normalized.length === 0) {
continue;
}
textParts.push(normalized);
}
if (textParts.length === 0) {
return null;
}
const headingText = textParts.join(' ');
const taskTitlePattern = /^([A-Za-z0-9]+)\s*-\s*(.+)$/i;
const match = taskTitlePattern.exec(headingText);
if (match === null) {
return null;
}
const symbol = match[1]?.trim();
const title = match[2]
?.replace(/\s+/g, ' ')
.trim();
if (!symbol || !title) {
return null;
}
return { symbol, title };
}
function formatTitle(contestId, task) {
const normalizedContestId = contestId.trim();
const normalizedSymbol = task.symbol.trim();
const normalizedTitle = task.title.trim();
if (normalizedContestId.length === 0) {
throw new Error('contestId must not be empty');
}
if (normalizedSymbol.length === 0 || normalizedTitle.length === 0) {
throw new Error('task info must not be empty');
}
return `${normalizedContestId}${normalizedSymbol} - ${normalizedTitle}`;
}
function initialize(root = document) {
const target = root.querySelector('.h2');
if (!(target instanceof Element)) {
return;
}
if (target.querySelector('[data-actc-copy-button="true"]') !== null) {
return;
}
const button = mountCopyButton(target);
button.dataset.actcCopyButton = 'true';
button.addEventListener('click', async () => {
const text = buildCopyText(window.location.pathname, root);
if (text === null) {
return;
}
await copyToClipboard(text, button);
});
}
function mountCopyButton(target) {
const button = createCopyButton();
target.appendChild(button);
return button;
}
function buildCopyText(pathname = window.location.pathname, root = document) {
const task = getTaskInfo(root);
if (task === null) {
return null;
}
const contestId = getContestId(pathname);
return formatTitle(contestId, task);
}
if (document.readyState === 'loading') {
document.addEventListener('DOMContentLoaded', () => {
initialize();
});
}
else {
initialize();
}
exports.buildCopyText = buildCopyText;
exports.initialize = initialize;
exports.mountCopyButton = mountCopyButton;
return exports;
})({});