Smart Copy Image のソースコード

Smart Copy Image

Custom "Copy Image As" with better filename
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// ==UserScript==
// @name         Smart Copy Image
// @namespace    http://tampermonkey.net/
// @version      1.0
// @description  Custom "Copy Image As" with better filename
// @match        *://*/*
// @grant        GM_setClipboard
// ==/UserScript==

(function () {
    'use strict';

    let menu;

    document.addEventListener('contextmenu', async (e) => {
        const img = e.target.closest('img');
        if (!img) return;

        e.preventDefault();

        if (menu) menu.remove();

        menu = document.createElement('div');
        menu.style.position = 'fixed';
        menu.style.top = `${e.clientY}px`;
        menu.style.left = `${e.clientX}px`;
        menu.style.background = '#222';
        menu.style.color = '#fff';
        menu.style.padding = '8px';
        menu.style.borderRadius = '6px';
        menu.style.zIndex = 999999;
        menu.style.cursor = 'pointer';
        menu.textContent = 'Copy image as smart name';

        menu.onclick = async () => {
            try {
                const response = await fetch(img.src);
                const blob = await response.blob();

                // Generate better filename
                let name = img.alt || img.src.split('/').pop().split('?')[0];
                name = name || 'image';

                // Clean filename
                name = name.replace(/[^\w.-]+/g, '_');

                // Clipboard API
                await navigator.clipboard.write([
                    new ClipboardItem({ [blob.type]: blob })
                ]);

                console.log(`Copied as: ${name}`);
            } catch (err) {
                console.error(err);
            }

            menu.remove();
        };

        document.body.appendChild(menu);
    });

    document.addEventListener('click', () => {
        if (menu) menu.remove();
    });
})();