Youtube 隱藏影片

調整 Youtube 影片的透明度。

目前為 2020-05-19 提交的版本,檢視 最新版本

// ==UserScript==
// @name               Youtube: Hide Video
// @name:zh-TW         Youtube 隱藏影片
// @name:zh-CN         Youtube 隐藏视频
// @name:ja            Youtube ビデオを隠す
// @name:ko            Youtube 비디오 숨기기
// @name:ru            Youtube Скрыть видео
// @version            1.0.3
// @description        Make Youtube Video and Images Opacity Lower.
// @description:zh-TW  調整 Youtube 影片的透明度。
// @description:zh-CN  调整 Youtube 视频的透明度。
// @description:ja     Youtube 動画と画像の不透明度を下げます。
// @description:ko     Youtube 비디오 및 이미지 불투명도를 낮추십시오.
// @description:ru     Уменьшите непрозрачность видео и изображений на Youtube.
// @author             Hayao-Gai
// @namespace	       https://github.com/HayaoGai
// @icon               https://upload.wikimedia.org/wikipedia/commons/4/4c/YouTube_icon.png
// @match              https://www.youtube.com/*
// @grant              GM_getValue
// @grant              GM_setValue
// ==/UserScript==

/* jshint esversion: 6 */

(function() {
    'use strict';

    // Icons made by https://www.flaticon.com/authors/pixel-perfect
    const off1 = `<svg width="35" height="35" viewBox="0 -107 512 512"><path d="m362.667969 298.667969h-213.335938c-82.34375 0-149.332031-67.007813-149.332031-149.335938 0-82.324219 66.988281-149.332031 149.332031-149.332031h213.335938c82.34375 0 149.332031 67.007812 149.332031 149.332031 0 82.328125-66.988281 149.335938-149.332031 149.335938zm-213.335938-266.667969c-64.703125 0-117.332031 52.652344-117.332031 117.332031 0 64.683594 52.628906 117.335938 117.332031 117.335938h213.335938c64.703125 0 117.332031-52.652344 117.332031-117.335938 0-64.679687-52.628906-117.332031-117.332031-117.332031zm0 0"/><path d="m149.332031 234.667969c-47.058593 0-85.332031-38.273438-85.332031-85.335938 0-47.058593 38.273438-85.332031 85.332031-85.332031 47.0625 0 85.335938 38.273438 85.335938 85.332031 0 47.0625-38.273438 85.335938-85.335938 85.335938zm0-138.667969c-29.394531 0-53.332031 23.914062-53.332031 53.332031 0 29.421875 23.9375 53.335938 53.332031 53.335938 29.398438 0 53.335938-23.914063 53.335938-53.335938 0-29.417969-23.9375-53.332031-53.335938-53.332031zm0 0"/></svg>`;
    const off2 = `<svg width="35" height="35" viewBox="0 -107 512 512"><path d="m362.667969 0h-213.335938c-82.324219 0-149.332031 66.988281-149.332031 149.332031 0 82.347657 67.007812 149.335938 149.332031 149.335938h213.335938c82.324219 0 149.332031-66.988281 149.332031-149.335938 0-82.34375-67.007812-149.332031-149.332031-149.332031zm-213.335938 234.667969c-47.058593 0-85.332031-38.273438-85.332031-85.335938 0-47.058593 38.273438-85.332031 85.332031-85.332031 47.0625 0 85.335938 38.273438 85.335938 85.332031 0 47.0625-38.273438 85.335938-85.335938 85.335938zm0 0"/></svg>`;
    const on1 = `<svg width="35" height="35" viewBox="0 -107 512 512"><path d="m0 149.332031c0 82.347657 67.007812 149.335938 149.332031 149.335938h213.335938c82.324219 0 149.332031-66.988281 149.332031-149.335938 0-82.34375-67.007812-149.332031-149.332031-149.332031h-213.335938c-82.324219 0-149.332031 66.988281-149.332031 149.332031zm277.332031 0c0-47.058593 38.273438-85.332031 85.335938-85.332031 47.058593 0 85.332031 38.273438 85.332031 85.332031 0 47.0625-38.273438 85.335938-85.332031 85.335938-47.0625 0-85.335938-38.273438-85.335938-85.335938zm0 0"/></svg>`;
    const on2 = `<svg width="35" height="35" viewBox="0 -107 512 512"><path d="m362.667969 298.667969h-213.335938c-82.34375 0-149.332031-67.007813-149.332031-149.335938 0-82.324219 66.988281-149.332031 149.332031-149.332031h213.335938c82.34375 0 149.332031 67.007812 149.332031 149.332031 0 82.328125-66.988281 149.335938-149.332031 149.335938zm-213.335938-266.667969c-64.703125 0-117.332031 52.652344-117.332031 117.332031 0 64.683594 52.628906 117.335938 117.332031 117.335938h213.335938c64.703125 0 117.332031-52.652344 117.332031-117.335938 0-64.679687-52.628906-117.332031-117.332031-117.332031zm0 0"/><path d="m362.667969 234.667969c-47.0625 0-85.335938-38.273438-85.335938-85.335938 0-47.058593 38.273438-85.332031 85.335938-85.332031 47.058593 0 85.332031 38.273438 85.332031 85.332031 0 47.0625-38.273438 85.335938-85.332031 85.335938zm0-138.667969c-29.398438 0-53.335938 23.914062-53.335938 53.332031 0 29.421875 23.9375 53.335938 53.335938 53.335938 29.394531 0 53.332031-23.914063 53.332031-53.335938 0-29.417969-23.9375-53.332031-53.332031-53.332031zm0 0"/></svg>`;
    const text =
`.switch {
    position: absolute;
    left: 190px;
    top: 8px;
}
.switch[dark="true"] {
    position: absolute;
    left: 190px;
    top: 8px;
    fill: white;
}
.hide {
    transition: opacity 0.3s;
    opacity: 0.1;
}`;
    let updating = false;

    css();
    init();
    locationChange();
    keyListener();
    window.addEventListener("scroll", update);

    function init() {
        addButton();
        hideTarget("img:not(.hide)");
        hideTarget("video:not(.hide)");
        hideTarget("#background:not(.hide)");
        hideTarget(".ytp-videowall-still-image:not(.hide)");
    }

    function update() {
        if (updating) return;
        updating = true;
        hideTarget("img:not(.hide)");
        hideTarget("video:not(.hide)");
        hideTarget(".ytp-videowall-still-image:not(.hide)");
        keyListener();
        setTimeout(() => { updating = false; }, 1000);
    }

    function addButton(retry = 0) {
        // get
        const logo = isCurrent() ? document.querySelector("ytd-topbar-logo-renderer#logo:not(added)") : document.querySelector(".yt-masthead-logo-container:not(added)");
        if (!logo) {
            if (retry < 10) setTimeout(() => addButton(retry + 1), 500);
            return;
        }
        logo.classList.add("added");
        // set
        const button = document.createElement("span");
        button.classList.add("switch");
        // dark theme
        const attDark = document.createAttribute("dark");
        attDark.value = isDark();
        button.setAttributeNode(attDark);
        // svg
        button.innerHTML = switchSVG();
        // append
        logo.parentNode.insertBefore(button, logo.nextSibling);
        // listener
        button.addEventListener("click", () => {
            setToggle(!getToggle());
            button.innerHTML = switchSVG();
        });
    }

    function hideTarget(target, retry = 0) {
        // get
        const targets = document.querySelectorAll(target);
        // check
        if (!targets.length) {
            if (retry < 10) setTimeout(() => hideTarget(target, retry + 1), 500);
            return;
        }
        // set
        if (getToggle()) {
            document.querySelectorAll(target).forEach(t => t.classList.add("hide"));
        } else {
            document.querySelectorAll(target).forEach(t => t.classList.remove("hide"));
        }
    }

    function manualDark() {
        const button = document.querySelector("span.switch");
        button.setAttribute("dark", window.location.href.includes("watch?v=") ? true : isDark());
        button.innerHTML = switchSVG();
    }

    function keyListener() {
        document.addEventListener("keydown", e => {
            if (e.keyCode === 72) {
                const button = document.querySelector(".switch");
                if (!button) return;
                setToggle(!getToggle());
                button.innerHTML = switchSVG();
            }
        });
    }

    function setToggle(value) {
        GM_setValue("switch", value);
        hideTarget("img", 0);
        hideTarget("video", 0);
    }

    function getToggle() {
        return GM_getValue("switch", false);
    }

    function switchSVG() {
        const on = (!isDark() && !window.location.href.includes("watch?v=")) ? on1 : on2;
        const off = (!isDark() && !window.location.href.includes("watch?v=")) ? off1 : off2;
        return getToggle() ? on : off;
    }

    function isCurrent() {
        if (!!document.querySelector(".yt-masthead-logo-container:not(added)")) {
            return false;
        } else {
            return true;
        }
    }

    function isDark() {
        if (!isCurrent()) {
            return false;
        } else {
            return document.querySelector("html").getAttribute("dark");
        }
    }

    function css() {
        const style = document.createElement("style");
        style.type = "text/css";
        style.innerHTML = text;
        document.head.appendChild(style);
    }

    function locationChange() {
        window.addEventListener('locationchange', init);
        // situation 1
        history.pushState = (f => function pushState(){
            var ret = f.apply(this, arguments);
            window.dispatchEvent(new Event('pushState'));
            window.dispatchEvent(new Event('locationchange'));
            return ret;
        })(history.pushState);
        // situation 2
        history.replaceState = (f => function replaceState(){
            var ret = f.apply(this, arguments);
            window.dispatchEvent(new Event('replaceState'));
            window.dispatchEvent(new Event('locationchange'));
            return ret;
        })(history.replaceState);
        // situation 3
        window.addEventListener('popstate', () => window.dispatchEvent(new Event('locationchange')));
    }

})();

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