视频触屏手势控制｜滑动进度+左右分控音量亮度·带浮层提示

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视频触屏手势控制｜滑动进度+左右分控音量亮度·带浮层提示

触屏在视频上左右滑动控制快进快退，无需全屏
当前为 2026-04-05 提交的版本，查看最新版本。
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// ==UserScript==
// @license MIT 
// @name         视频触屏手势控制｜滑动进度+左右分控音量亮度·带浮层提示
// @namespace    http://tampermonkey.net/
// @version      2.0
// @description  触屏在视频上左右滑动控制快进快退，无需全屏
// @author       assistant
// @match        *://*/*
// @grant        none
// ==/UserScript==




(function() {

    'use strict';

    const CONFIG = {

        seekSensitivity: 0.12,

        brightnessSensitivity: 0.001,

        volumeSensitivity: 0.001,

        minMoveDistance: 5

    };

    let currentVideo = null;

    let startX = 0, startY = 0;

    let isHorizontal = false, isVertical = false;

    let isLeftSide = false;

    let lastBrightness = 1.0;

    // ========== 浮层相关 ==========

    let tip = null;

    let tipTimer = null;

    function createTip() {

        if (tip) return;

        tip = document.createElement('div');

        tip.style.cssText = `

            position: fixed;

            left: 50%;

            top: 50%;

            transform: translate(-50%, -50%);

            padding: 10px 16px;

            background: rgba(0,0,0,0.7);

            color: #fff;

            border-radius: 8px;

            font-size: 16px;

            z-index: 999999;

            pointer-events: none;

            opacity: 0;

            transition: opacity 0.2s;

            white-space: nowrap;

        `;

        document.body.appendChild(tip);

    }

    function showTip(text) {

        createTip();

        tip.textContent = text;

        tip.style.opacity = 1;

        clearTimeout(tipTimer);

        tipTimer = setTimeout(() => {

            tip.style.opacity = 0;

        }, 700);

    }

    // ========== 触摸逻辑 ==========

    document.addEventListener('touchstart', e => {

        const video = e.target.closest('video');

        if (!video) return;

        currentVideo = video;

        const touch = e.touches[0];

        const rect = video.getBoundingClientRect();

        startX = touch.clientX;

        startY = touch.clientY;

        isLeftSide = touch.clientX < rect.left + rect.width / 2;

        isHorizontal = isVertical = false;

        const match = getComputedStyle(video).filter.match(/brightness\(([\d.]+)\)/);

        lastBrightness = match ? parseFloat(match[1]) : 1.0;

    }, { passive: true });

    document.addEventListener('touchmove', e => {

        if (!currentVideo) return;

        const touch = e.touches[0];

        const dx = touch.clientX - startX;

        const dy = touch.clientY - startY;

        const absX = Math.abs(dx);

        const absY = Math.abs(dy);

        if (!isHorizontal && !isVertical) {

            if (absX > absY && absX > CONFIG.minMoveDistance) isHorizontal = true;

            else if (absY > absX && absY > CONFIG.minMoveDistance) isVertical = true;

        }

        if (isHorizontal) {

            currentVideo.currentTime += dx * CONFIG.seekSensitivity;

            showTip(`进度 ${dx > 0 ? '+' : ''}${Math.round(dx * CONFIG.seekSensitivity)}s`);

            startX = touch.clientX;

            e.preventDefault();

        }

        if (isVertical) {

            if (isLeftSide) {

                const delta = -dy * CONFIG.brightnessSensitivity;

                lastBrightness = Math.max(0.2, Math.min(2.0, lastBrightness + delta));

                currentVideo.style.filter = `brightness(${lastBrightness})`;

                showTip(`亮度 ${Math.round(lastBrightness * 100)}%`);

            } else {

                const delta = -dy * CONFIG.volumeSensitivity;

                currentVideo.volume = Math.max(0, Math.min(1, currentVideo.volume + delta));

                showTip(`音量 ${Math.round(currentVideo.volume * 100)}%`);

            }

            startY = touch.clientY;

            e.preventDefault();

        }

    }, { passive: false });

    document.addEventListener('touchend', () => {

        currentVideo = null;

        isHorizontal = isVertical = false;

    });

})();