Video Control with Reload

为指定视频添加可移动的进度条、音量控制器和重新加载按钮
目前为 2024-06-29 提交的版本，查看最新版本。
换行
// ==UserScript==
// @name         Video Control with Reload
// @namespace    http://tampermonkey.net/
// @version      0.9
// @description  为指定视频添加可移动的进度条、音量控制器和重新加载按钮
// @match        https://app.kosmi.io/*
// @grant        none
// @license      MIT
// ==/UserScript==
 
(function() {
    'use strict';
 
    let videoElement = null;
    let controller = null;
    let isDragging = false; // 是否正在拖动控制器
    let initialX = 0, initialY = 0; // 初始点击位置
    let lastX = 0, lastY = 0; // 上一次位置
 
    // 创建控制器
    function createController() {
        controller = document.createElement('div');
        controller.id = 'video-controller';
        controller.style.cssText = `
            position: fixed;
            bottom: 20px;
            left: 50%;
            transform: translateX(-50%);
            background-color: rgba(0, 0, 0, 0.7);
            color: white;
            padding: 10px;
            border-radius: 5px;
            z-index: 9999;
            cursor: move;
            user-select: none;
            width: 300px;
            transition: width 0.3s, height 0.3s;
            display: none; /* 初始隐藏 */
        `;
        controller.innerHTML = `
            <div id="progress-container" style="width: 100%; height: 10px; background-color: #444; position: relative; cursor: pointer;">
                <div id="progress-indicator" style="width: 0%; height: 100%; background-color: #fff; position: absolute;"></div>
            </div>
            <div id="time-display" style="text-align: center; margin-top: 5px;">0:00 / 0:00</div>
            <div id="volume-container" style="display: flex; align-items: center; margin-top: 10px;">
                <span id="volume-icon" style="margin-right: 10px;">🔊</span>
                <input type="range" id="volume-slider" min="0" max="1" step="0.1" value="1" style="flex-grow: 1;">
            </div>
            <button id="reload-button" style="width: 100%; margin-top: 10px; padding: 5px; background-color: #4CAF50; border: none; color: white; cursor: pointer;">重新加载视频控制</button>
        `;
        document.body.appendChild(controller);
        return controller;
    }
 
    // 创建显示/隐藏按钮
    function createToggleButton() {
        const button = document.createElement('button');
        button.textContent = '🎥'; // 修改按钮图标
        button.style.cssText = `
            position: fixed;
            left: 10px;
            top: 50%;
            transform: translateY(-50%);
            padding: 5px;
            font-size: 20px;
            background-color: rgba(0, 0, 0, 0.5);
            color: white;
            border: none;
            border-radius: 50%;
            cursor: move;
            z-index: 9999;
        `;
        document.body.appendChild(button);
 
        // 使按钮可拖动
        let pos1 = 0, pos2 = 0;
 
        button.addEventListener('touchstart', touchStart, false);
 
        function touchStart(e) {
            isDragging = true;
            initialX = e.touches[0].clientX;
            initialY = e.touches[0].clientY;
            lastX = initialX;
            lastY = initialY;
            document.addEventListener('touchmove', touchMove, false);
            document.addEventListener('touchend', touchEnd, false);
        }
 
        function touchMove(e) {
            if (!isDragging) return;
            e.preventDefault();
            let currentX = e.touches[0].clientX;
            let currentY = e.touches[0].clientY;
 
            pos1 = lastX - currentX;
            pos2 = lastY - currentY;
            lastX = currentX;
            lastY = currentY;
 
            button.style.top = (button.offsetTop - pos2) + "px";
            button.style.left = (button.offsetLeft - pos1) + "px";
        }
 
        function touchEnd() {
            isDragging = false;
            document.removeEventListener('touchmove', touchMove, false);
            document.removeEventListener('touchend', touchEnd, false);
        }
 
        button.addEventListener('click', function() {
            if (controller.style.display === 'none') {
                controller.style.display = 'block';
            } else {
                controller.style.display = 'none';
            }
        });
    }
 
    // 使控制器可拖动
    function makeDraggable(element) {
        let pos1 = 0, pos2 = 0;
 
        element.addEventListener('mousedown', dragMouseDown, false);
 
        function dragMouseDown(e) {
            if (e.target.id === 'progress-container' || e.target.id === 'progress-indicator' || e.target.id === 'volume-slider' || e.target.id === 'reload-button') return;
            e.preventDefault();
            isDragging = true;
 
            initialX = e.clientX;
            initialY = e.clientY;
            lastX = initialX;
            lastY = initialY;
            document.addEventListener('mouseup', closeDragElement, false);
            document.addEventListener('mousemove', throttle(elementDrag, 16), false); // 节流控制拖动频率
        }
 
        function elementDrag(e) {
            if (!isDragging) return;
            e.preventDefault();
            pos1 = initialX - e.clientX;
            pos2 = initialY - e.clientY;
            initialX = e.clientX;
            initialY = e.clientY;
 
            requestAnimationFrame(() => {
                element.style.top = (element.offsetTop - pos2) + "px";
                element.style.left = (element.offsetLeft - pos1) + "px";
                element.style.bottom = 'auto';
            });
        }
 
        function closeDragElement() {
            document.removeEventListener('mouseup', closeDragElement, false);
            document.removeEventListener('mousemove', throttle(elementDrag, 16), false);
            isDragging = false;
        }
    }
 
    // 节流函数，用于限制函数调用频率
    function throttle(func, limit) {
        let lastFunc;
        let lastRan;
        return function() {
            const context = this;
            const args = arguments;
            if (!lastRan) {
                func.apply(context, args);
                lastRan = Date.now();
            } else {
                clearTimeout(lastFunc);
                lastFunc = setTimeout(function() {
                    if ((Date.now() - lastRan) >= limit) {
                        func.apply(context, args);
                        lastRan = Date.now();
                    }
                }, limit - (Date.now() - lastRan));
            }
        };
    }
 
    // 格式化时间
    function formatTime(seconds) {
        const minutes = Math.floor(seconds / 60);
        seconds = Math.floor(seconds % 60);
        return `${minutes}:${seconds.toString().padStart(2, '0')}`;
    }
 
    // 主函数
    function main() {
        // 先移除已存在的控制器元素和按钮
        const existingController = document.getElementById('video-controller');
        const existingButton = document.getElementById('toggle-button');
        if (existingController) {
            existingController.remove();
        }
        if (existingButton) {
            existingButton.remove();
        }
 
        videoElement = document.querySelector('video[src^="blob:https://app.kosmi.io/"]');
        if (!videoElement) {
            console.log('未找到指定视频');
            return;
        }
 
        controller = createController();
        makeDraggable(controller);
        createToggleButton();
 
        const progressContainer = document.getElementById('progress-container');
        const progressIndicator = document.getElementById('progress-indicator');
        const timeDisplay = document.getElementById('time-display');
        const volumeSlider = document.getElementById('volume-slider');
        const volumeIcon = document.getElementById('volume-icon');
        const reloadButton = document.getElementById('reload-button');
 
        // 更新进度
        function updateProgress() {
            const progress = (videoElement.currentTime / videoElement.duration) * 100;
            progressIndicator.style.width = `${progress}%`;
            const current = formatTime(videoElement.currentTime);
            const total = formatTime(videoElement.duration);
            timeDisplay.textContent = `${current} / ${total}`;
        }
 
        // 点击进度条更新视频位置
        progressContainer.addEventListener('click', function(e) {
            if (isDragging) return;
            const rect = progressContainer.getBoundingClientRect();
            const pos = (e.clientX - rect.left) / rect.width;
            videoElement.currentTime = pos * videoElement.duration;
        });
 
        // 更新音量
        volumeSlider.addEventListener('input', function() {
            videoElement.volume = this.value;
            updateVolumeIcon(this.value);
        });
 
        // 更新音量图标
        function updateVolumeIcon(volume) {
            if (volume > 0.5) {
                volumeIcon.textContent = '🔊';
            } else if (volume > 0) {
                volumeIcon.textContent = '🔉';
            } else {
                volumeIcon.textContent = '🔇';
            }
        }
 
        // 初始化音量
        volumeSlider.value = videoElement.volume;
        updateVolumeIcon(videoElement.volume);
 
        // 重新加载按钮事件
        reloadButton.addEventListener('click', function() {
            // 移除旧的事件监听器
            videoElement.removeEventListener('timeupdate', updateProgress);
            videoElement.removeEventListener('loadedmetadata', updateProgress);
 
            // 重新执行主函数
            main();
 
            // 重新绑定事件监听器
            videoElement.addEventListener('timeupdate', updateProgress);
            videoElement.addEventListener('loadedmetadata', updateProgress);
        });
 
        videoElement.addEventListener('timeupdate', updateProgress);
        videoElement.addEventListener('loadedmetadata', updateProgress);
    }
 
    // 等待视频加载完成
    function waitForVideo() {
        const video = document.querySelector('video[src^="blob:https://app.kosmi.io/"]');
        if (video) {
            main();
        } else {
            setTimeout(waitForVideo, 1000);
        }
    }
 
    waitForVideo();
})();