AtCoder Text Cleanup for Kotlin

AtCoder_Text_Cleanup_for_Kotlin.user.js

// ==UserScript==
// @name         AtCoder Text Cleanup for Kotlin
// @namespace    http://atcoder.jp/
// @version      0.4
// @description  Remove lines starting with @file or package and blank lines when pasting into text boxes on AtCoder contest pages.
// @author       tamgo324
// @include      https://atcoder.jp/contests/*/tasks/*
// @include      https://atcoder.jp/contests/*/submit
// @grant        none
// ==/UserScript==

/**
 * "@file" か "package " で始まる行を削除して貼り付ける
 * また、 "@file" と "package" で始まる行の後にある空白行も削除します
 * もし、Test & Submit ボタンがあったら、それをクリックします。
 */
(function() {
    'use strict';

    // Wait until the DOM is fully loaded
    window.addEventListener('load', function() {
        // Get all CodeMirror instances
        var codeMirrors = document.querySelectorAll('.CodeMirror');
        codeMirrors.forEach(cmElement => {
            // Get the actual CodeMirror instance
            var cmInstance = cmElement.CodeMirror;
            cmInstance.on('paste', function(instance, event) {
                // Get the paste data as text
                var pasteText = (event.clipboardData || window.clipboardData).getData('text');
                // Stop the original paste event
                event.preventDefault();
                // Split the pasted text by line
                var lines = pasteText.split('\n');
                // Create a new array to hold the cleaned lines
                var cleanedLines = [];
                for (var i = 0; i < lines.length; i++) {
                    var line = lines[i];
                    // If the line starts with '@file' or 'package ', skip this line and the next blank line
                    if (line.startsWith('@file') || line.startsWith('package ')) {
                        if (i + 1 < lines.length && lines[i + 1].trim() === '') {
                            i++;  // Skip the next blank line
                        }
                    } else {
                        // Add non-blank lines to the cleanedLines array
                        cleanedLines.push(line);
                    }
                }
                var newText = cleanedLines.join('\n');
                // Get the current selection range
                var selection = {from: cmInstance.getCursor('start'), to: cmInstance.getCursor('end')};
                // Replace the selected range with the new text
                cmInstance.replaceRange(newText, selection.from, selection.to);
                // Get the "Test and Submit" button by id
                var button = document.getElementById('atcoder-easy-test-btn-test-and-submit');
                // If the button exists, click it
                if (button) {
                    button.click();
                }
            });
        });
    });
})();

v0.2 "@file" と "package" で始まる行の間にある空白行も削除するように修正

v0.3 全体を選択してから貼り付けをしても正常に貼り付けできるように変更