github-comment-auto-indent.js

// ==UserScript==
// @name        Format comments code for github.com
// @namespace   Violentmonkey Scripts
// @match       https://github.com/*
// @grant       none
// @version     1.0
// @author      -
// @description 11/10/2024, 3:14:13 PM
// ==/UserScript==
// Create a button element
// Function to fix code indentation
function fixIndentation(code) {
    // Split the code into lines
    const lines = code.split('\n');

    // Find the minimum indentation level (excluding empty lines)
    const minIndent = lines
        .filter(line => line.trim().length > 0)
        .reduce((min, line) => {
            const indent = line.match(/^\s*/)[0].length;
            return indent < min ? indent : min;
        }, Infinity);

    // Remove the minimum indentation from all lines
    const fixedLines = lines.map(line => {
        if (line.trim().length === 0) return '';
        return line.slice(minIndent);
    });

    // Join the lines back together
    return fixedLines.join('\n');
}

// Function to handle the paste event
async function handlePaste(e) {
    // Prevent the default paste
    e.preventDefault();

    try {
        // Get the clipboard content
        const text = await navigator.clipboard.readText();

        // Fix the indentation
        const fixedText = fixIndentation(text);

        // Get the target element
        const target = e.target;

        // Get the current cursor position
        const startPos = target.selectionStart;
        const endPos = target.selectionEnd;

        // Get the current value
        const currentValue = target.value;

        // Create the new value by combining the parts
        const newValue =
            currentValue.substring(0, startPos) +
            fixedText +
            currentValue.substring(endPos);

        // Set the new value
        target.value = newValue;

        // Set the cursor position after the pasted text
        target.selectionStart = target.selectionEnd = startPos + fixedText.length;
    } catch (error) {
        console.error('Failed to access clipboard:', error);
    }
}

// Add the paste event listener
document.addEventListener("paste", handlePaste);