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b-live-random-send-test

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当前为 2023-09-13 提交的版本,查看 最新版本

此脚本不应直接安装。它是供其他脚本使用的外部库,要使用该库请加入元指令 // @require https://update.greasyfork.icu/scripts/447936/1249747/b-live-random-send-test.js

(function () {
    window.autoSendDanmuModuleLoaded = false;
    const blobURL = URL.createObjectURL(
        new Blob(
            [
                '(',
                function () {
                    const ids = {};
                    // 监听message 开始执行定时器或者销毁
                    self.onmessage = (e) => {
                        switch (e.data.command) {
                            case 'interval:start': // 开启定时器
                                const intervalId = setInterval(() => postMessage({ message: 'interval:tick', id: e.data.id }), e.data.interval);
                                // postMessage({ message: 'interval:started', id: e.data.id });
                                ids[e.data.id] = intervalId;
                                break;
                            case 'interval:clear': // 销毁
                                clearInterval(ids[e.data.id]);
                                postMessage({ message: 'interval:cleared', id: e.data.id });
                                delete ids[e.data.id];
                                break;
                            case 'timeout:start':
                                const timeoutId = setTimeout(() => postMessage({ message: 'timeout:tick', id: e.data.id }), e.data.timeout);
                                // postMessage({ message: 'timeout:started', id: e.data.id });
                                ids[e.data.id] = timeoutId;
                                break;
                            case 'timeout:clear':
                                clearTimeout(ids[e.data.id]);
                                postMessage({ message: 'timeout:cleared', id: e.data.id });
                                delete ids[e.data.id];
                                break;
                        }
                    };
                }.toString(),
                ')()',
            ],
            { type: 'application/javascript' },
        ),
    );
    const worker = new Worker(blobURL);
    URL.revokeObjectURL(blobURL); //用完释放URL对象
    const workerTimer = {
        id: 0,
        callbacks: {},
        setInterval: (cb, interval, context) => {
            const id = ++workerTimer.id;
            workerTimer.callbacks[id] = { fn: cb, context: context };
            worker.postMessage({ command: 'interval:start', interval: interval, id: id });
            return id;
        },
        setTimeout: (cb, timeout, context) => {
            const id = ++workerTimer.id;
            workerTimer.callbacks[id] = { fn: cb, context: context };
            worker.postMessage({ command: 'timeout:start', timeout: timeout, id: id });
            return id;
        },

        // 监听worker 里面的定时器发送的message 然后执行回调函数
        onMessage: (e) => {
            switch (e.data.message) {
                case 'interval:tick':
                case 'timeout:tick':
                    const callbackItem = workerTimer.callbacks[e.data.id];
                    if (callbackItem && callbackItem.fn) {
                        callbackItem.fn.apply(callbackItem.context);
                    }

                    break;
                case 'interval:cleared':
                case 'timeout:cleared':
                    delete workerTimer.callbacks[e.data.id];
                    break;
            }
        },

        // 往worker里面发送销毁指令
        clearInterval: (id) => worker.postMessage({ command: 'interval:clear', id: id }),
        clearTimeout: (id) => worker.postMessage({ command: 'timeout:clear', id: id }),
    };
    worker.onmessage = workerTimer.onMessage.bind(workerTimer);
})();