add copy button to tasks_print

browser-extension/chrome-extension-test/tests/copy_button_on_tasks_print.spec.ts

@@ -0,0 +1,43 @@
+import {test, expect} from '../fixtures';
+import {Page, Locator} from "@playwright/test";
+
+require('dotenv').config({path: './.env'});
+
+test.describe.configure({mode: 'serial'});
+
+let page: Page;
+
+test.beforeAll(async ({context}) => {
+    page = await context.newPage();
+    await page.goto('https://atcoder.jp/contests/abc386/tasks_print');
+});
+
+test.afterAll(async () => {
+    await page.close();
+});
+
+test('Check copy buttons are added', async () => {
+    const copyButtons = page.locator('span.btn-copy');
+    await expect(copyButtons).toHaveCount(52);
+});
+
+test('Check clipboard after copying', async () => {
+    const copyButtons = page.locator('span.btn-copy');
+    // First button
+    await copyButtons.nth(0).click();
+    let copiedText = await page.evaluate(() => navigator.clipboard.readText());
+    expect(copiedText.replace(/\r\n/g, '')).toBe('7 7 7 1');
+
+    // 28th button
+    await copyButtons.nth(28).click();
+    copiedText = await page.evaluate(() => navigator.clipboard.readText());
+    expect(copiedText.replace(/\r/g, '')).toBe('4 3\n' +
+        '4 1 B\n' +
+        '3 2 W\n' +
+        '1 3 B\n');
+
+    // Last button
+    await copyButtons.nth(51).click();
+    copiedText = await page.evaluate(() => navigator.clipboard.readText());
+    expect(copiedText.replace(/\r\n/g, '')).toBe('707081320');
+});

browser-extension/chrome-extension/manifest.json

@@ -110,6 +110,14 @@
             ],
             "run_at": "document_idle",
             "world": "MAIN"
+        }, 
+        {
+            "js": [
+                "scripts/tasks_print/main.js"
+            ],
+            "matches": [
+                "*://atcoder.jp/contests/*/tasks_print"
+            ]
         }
     ]
 }

browser-extension/chrome-extension/scripts/tasks_print/main.js

@@ -0,0 +1,37 @@
+const isVisible = (element) => {
+    return element.offsetWidth > 0 &&
+        element.offsetHeight > 0 &&
+        window.getComputedStyle(element).visibility !== 'hidden'
+        && window.getComputedStyle(element).display !== 'none';
+}
+
+let index = 0;
+while (true) {
+    const taskStatement = document.getElementById('task-statement');
+    if (taskStatement) {
+        taskStatement.id = `task-statement-${index}`;
+        index++;
+    } else break;
+}
+
+for (let i = 0; i < index; i++) {
+    const taskStatement = document.getElementById(`task-statement-${i}`);
+    const divsAfterIODiv = taskStatement.querySelectorAll('div.io-style ~ div.part');
+    const ioDivs = Array.from(divsAfterIODiv).filter(isVisible);
+
+    for (const div of ioDivs) {
+        const button = (new DOMParser()).parseFromString(`<span class="btn btn-default btn-sm btn-copy ml-1" tabindex="0">Copy</span>`, "text/html").body.firstChild;
+        var h3Element = div.querySelector('h3');
+        h3Element.insertAdjacentElement('beforeend', button);
+        const pre = h3Element.nextElementSibling;
+        button.addEventListener('click', function () {
+            copyToClipboard(pre.textContent).then(() => {
+                button.textContent = 'Copied';
+                setTimeout(() => {
+                    button.textContent = 'Copy';
+                    button.blur();
+                }, 500);
+            });
+        });
+    }
+}

browser-extension/chrome-extension/scripts/testcase/main.js

@@ -8,7 +8,7 @@ const copyButton = $('span[data-toggle="tooltip"]:visible').first();
     if (allTestCasesSz === 0)
         return;
 
-    const downloadButton = (new DOMParser()).parseFromString(`<button class="btn btn-default btn-sm" id="dltc" title="Just click once to download.">Download all test cases (${humanReadable(allTestCasesSz)})</button>`, "text/html").body.children[0];
+    const downloadButton = (new DOMParser()).parseFromString(`<button class="btn btn-default btn-sm" id="dltc" title="Just click once to download.">Download all test cases (${humanReadable(allTestCasesSz)})</button>`, "text/html").body.firstChild;
     document.querySelector('span.h2').appendChild(downloadButton);
     downloadButton.onclick = async () => {
         downloadButton.disabled = true;