Select to decode base64

Automatically decodes Base64 encoded text

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(I already have a user script manager, let me install it!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @name         Select to decode base64
// @namespace    http://tampermonkey.net/
// @version      1.0
// @description  Automatically decodes Base64 encoded text
// @author       raculus
// @match        *://*/*
// @grant        none
// ==/UserScript==

(function() {
document.addEventListener('mouseup', handleSelection);
document.addEventListener('keyup', handleSelection);

function handleSelection() {
    const selectedText = window.getSelection().toString();

    if (selectedText) {
        console.log('선택된 텍스트:', selectedText);

        // Base64 디코딩 시도
        const decodedText = decodeBase64(selectedText);

        if (decodedText) {
            console.log('Base64 디코딩 성공:', decodedText);

            replaceSelectedContent(decodedText);
        } else {
            console.log('선택된 텍스트는 Base64 형식이 아닙니다.');
        }
    }
}

// Base64 디코딩 함수
function decodeBase64(text) {
    try {
        return atob(text);
    } catch (e) {
        return null; // Base64 디코딩 실패 시 null 반환
    }
}

// 선택된 내용을 대체하는 함수 (텍스트 또는 링크)
function replaceSelectedContent(content) {
    const selection = window.getSelection();

    if (!selection.rangeCount) return;

    const range = selection.getRangeAt(0);
    range.deleteContents(); // 기존 선택 영역의 텍스트 삭제

    let newNode;
    if ( isValidURL(content) ) {
        // <a> 태그 생성 및 설정
        newNode = document.createElement('a');
        newNode.href = content;
        newNode.textContent = content;
        newNode.style.color = 'blue'; // 링크 스타일 설정 (선택 사항)
        newNode.style.textDecoration = 'underline'; // 밑줄 추가
    } else {
        // 일반 텍스트 노드 삽입
        newNode = document.createTextNode(content);
    }

    range.insertNode(newNode);

    // 선택 영역 초기화
    selection.removeAllRanges();
    const newRange = document.createRange();
    newRange.selectNode(newNode);
    selection.addRange(newRange);
}

// URL 유효성 검증 함수
function isValidURL(string) {
    try {
        new URL(string);
        return true;
    } catch (_) {
        return false;
    }
}
})();