// ==UserScript==
// @name         123云盘剪贴板写入拦截
// @namespace    https://tampermonkey.net/
// @version      1.2
// @description  在 123 云盘页面，彻底阻止任何JS向剪贴板写入内容
// @match        *://*.123pan.cn/s/*
// @match        *://*.123pan.com/s/*
// @match        *://*.123684.com/s/*
// @match        *://*.123865.com/s/*
// @match        *://*.123912.com/s/*
// @match        *://*.123952.com/s/*
// @match        *://pan.quark.cn/s/*
// @grant        none
// @run-at       document-start
// ==/UserScript==

(function() {
    'use strict';

    // ----- 1. 拦截 navigator.clipboard（优雅降级）-----
    if (navigator.clipboard) {
        ['writeText', 'write'].forEach(method => {
            if (navigator.clipboard[method]) {
                Object.defineProperty(navigator.clipboard, method, {
                    value: () => Promise.resolve(),  // 伪装成功，避免报错
                    writable: false,
                    configurable: false
                });
            }
        });
    }

    // ----- 2. 拦截 document.execCommand -----
    const rawExec = document.execCommand?.bind(document);
    if (rawExec) {
        Object.defineProperty(document, 'execCommand', {
            value: function(cmd, ...args) {
                const c = String(cmd).toLowerCase();
                if (c === 'copy' || c === 'cut') return false;
                return rawExec(cmd, ...args);
            },
            writable: false,
            configurable: false
        });
    }

    // ----- 3. 拦截 DataTransfer.setData -----
    const rawSetData = DataTransfer.prototype.setData;
    DataTransfer.prototype.setData = function(type, data) {
        // 阻止剪贴板相关的 MIME 类型写入
        if (type === 'text/plain' || type === 'text/uri-list' || 
            type === 'text/html' || this.types?.includes('text/plain')) {
            return;
        }
        return rawSetData.call(this, type, data);
    };

    // ----- 4. 拦截 copy/cut 事件（全部阻止）-----
    const handler = e => {
        e.preventDefault();
        e.stopImmediatePropagation();
    };
    document.addEventListener('copy', handler, true);
    document.addEventListener('cut', handler, true);

})();