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YouTube Sizer

Make Youtube Player 480px Size

目前為 2021-02-07 提交的版本，檢視 最新版本。

/*
    Resize YouTube player to 480px size.
    Copyright (C) 2021 Runio

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program. If not, see <http://www.gnu.org/licenses/>
*/
// ==UserScript==
// @name          YouTube Sizer
// @author        Runio
// @namespace     namespace_runio
// @version       1.30
// @description   Make Youtube Player 480px Size
// @match         https://www.youtube.com/*
// @match         https://youtu.be/*
// @exclude-match https://www.youtube.com/
// @exclude-match https://www.youtube.com/tv*
// @exclude-match https://www.youtube.com/embed/*
// @exclude-match https://www.youtube.com/live_chat*
// @run-at        document-end
// @grant         GM_setValue
// @grant         GM_getValue
// @compatible    Firefox version >= 69
// @compatible    Chrome version >= 64
// @icon          https://i.imgur.com/KJeLd60.png
// @license       GPL-3.0+
// @noframes
// ==/UserScript==
"use strict";
//==================================================================
//Local Storage Functions
if (window.frameElement) throw new Error("Stopped JavaScript.");

function set_pref(preference, new_value) {
    GM_setValue(preference, new_value);
}

function get_pref(preference) {
    return GM_getValue(preference);
}

function init_pref(preference, new_value) {
    var value = get_pref(preference);
    if (value == null) {
        set_pref(preference, new_value);
        value = new_value;
    }
    return value;
}
//==================================================================
init_pref("yt-resize", false);
//==================================================================
// Global Booleans
var scrub_bool = false;
var button_done = false;
var pref_done = false;
var resize_done = false;
//==================================================================
// Global Variables
var max_width = 480; // Max Width of Video
var aspect_ratio = 16/9; // Aspect Ratio
var shortcut_key = "r"; // Shortcut Key
var smaller_string = "ytd-watch-flexy[flexy_] #primary.ytd-watch-flexy:not([theater]):not([fullscreen]) {max-width: calc("+max_width+"px * "+aspect_ratio+") !important;";
var css_ytresize = ".ytp-big-mode .ytp-chrome-controls .ytp-resize-button {display: none !important;} .ytp-chrome-bottom {max-width: calc(100% - 24px);width: calc(100% - 24px);}";
//==================================================================
window.addEventListener("yt-navigate-start", () => {
    startScript();
});
window.addEventListener("yt-page-data-updated", () => {
    startScript();
});
//==================================================================
// Start Script
function startScript() {
    'use strict';
    if (document.readyState == "complete" || document.readyState == "loaded" || document.readyState == "interactive") {
        startMethods();
    } else {
        document.addEventListener("DOMContentLoaded", function() {
            startMethods();
        });
    }
}
//==================================================================
function startMethods() {
    window.ytd_video = document.getElementById("ytd-player");
    window.movie_player = document.getElementById("movie_player");
    window.outer = document.getElementById("player-container-outer");
    window.video = document.getElementsByTagName("video")[0];
    window.ytd_flexy = document.getElementsByTagName("ytd-watch-flexy")[0];
    if (pref_done == false) {
        if (get_pref("yt-resize")) {
            addSmaller(smaller_string);
        }
        autoResizeVideo();
        addCss(css_ytresize);
        pref_done = true;
    }
}
//==================================================================
//Scrubber Event Listener
function getComputedTranslateXY(obj) {
    const transArr = [];
    if (!window.getComputedStyle) return;
    const style = getComputedStyle(obj),
        transform = style.transform || style.webkitTransform || style.mozTransform;
    let mat = transform.match(/^matrix3d\((.+)\)$/);
    if (mat) return parseFloat(mat[1].split(', ')[13]);
    mat = transform.match(/^matrix\((.+)\)$/);
    mat ? transArr.push(parseFloat(mat[1].split(', ')[4])) : 0;
    mat ? transArr.push(parseFloat(mat[1].split(', ')[5])) : 0;
    return transArr;
}

function scrubListener() {
    var elem = document.querySelector(".ytp-progress-bar-container > .ytp-progress-bar");

    elem.addEventListener('timeupdate', function(elem) {
        var event = new CustomEvent('scrubber');
        elem.dispatchEvent(event);
    });

    elem.addEventListener('scrubber', function() {
        var scrub = document.querySelector(".ytp-progress-bar > .ytp-scrubber-container");
        var progress = document.querySelector(".ytp-progress-list > .ytp-hover-progress");
        var numericValue = window.getComputedStyle(progress, null).getPropertyValue('left').match(/\d+/);
        if (scrub) {
            if (Math.floor(getComputedTranslateXY(scrub)[0]) == parseInt(numericValue[0])) {
                scrub_bool = true;
            }
            return (scrub_bool);
        } else {
            return false;
        }
    });
}
//==================================================================
function isInViewport(video, element) {
    var rect = element.getBoundingClientRect();
    return (
        rect.top >= 0 &&
        rect.left >= 0 &&
        rect.bottom >= video.clientHeight &&
        rect.right >= video.clientWidth
    );
}

function isCentered(element1, element2) {
    var rect = element1.getBoundingClientRect();
    var rect2 = element2.getBoundingClientRect();
    var centered = {
        outer: rect.left + rect.width / 2,
        inner: rect2.left + rect2.width / 2,
    };
    return (
        Math.floor(centered.outer) == Math.floor(centered.inner)
    );
}

function addCss(cssString) {
    var head = document.getElementsByTagName('head')[0];
    var newCss = document.createElement('style');
    newCss.type = "text/css";
    newCss.setAttribute("id", "yt-css");
    newCss.innerHTML = cssString;
    head.appendChild(newCss);
}

function addSmaller(cssString) {
    var head = document.getElementsByTagName('head')[0];
    var newCss = document.createElement('style');
    newCss.type = "text/css";
    newCss.setAttribute("id", "small-player");
    newCss.innerHTML = cssString;
    head.appendChild(newCss);
}

function injectJs(link) {
    var scr = document.createElement('script');
    scr.type = "text/javascript";
    scr.innerHTML = link;
    document.getElementsByTagName('head')[0].appendChild(scr);
}

function show_resize_button_tooltip(btn, show = true) {
    var bbcr = btn.getBoundingClientRect(); // Get button position
    var tooltip_horiz_cen = bbcr.left + bbcr.width / 2; // Tooltip horizontal center
    var tooltip_top_offset = 57; // Height above the button for the tooltip
    var tooltip_top = bbcr.top + bbcr.height / 2 - tooltip_top_offset; // Tooltip top
    var tooltip = document.getElementById("ytd-resize-tt");
    var html_player = document.getElementsByClassName("html5-video-player")[0];
    var tooltip_text_wrapper = document.createElement("div");
    var tooltip_text, tooltip_width;
    if (document.fullscreenElement) { // Check if Fullscreen
        tooltip_top_offset = 75;
    }
    if (!tooltip) { // Create Tooltip if it doesn't exist.
        tooltip = document.createElement("div");
        tooltip_text = document.createElement("span");
        tooltip.setAttribute("class", "ytp-tooltip ytp-bottom");
        tooltip.setAttribute("id", "ytd-resize-tt");
        tooltip.style.setProperty("position", "fixed");
        tooltip_text_wrapper.setAttribute("class", "ytp-tooltip-text-wrapper");
        tooltip_text.setAttribute("class", "ytp-tooltip-text");
        tooltip_text.setAttribute("id", "ytd-resize-tt-text");
        tooltip.appendChild(tooltip_text_wrapper);
        tooltip_text_wrapper.appendChild(tooltip_text);
        html_player.appendChild(tooltip);
    } else { // Get Tooltip text if exists
        tooltip_text = document.getElementById("ytd-resize-tt-text");
    }
    if (show) { // Show
        tooltip.style.setProperty("top", tooltip_top + "px");
        tooltip_text.innerHTML = btn.getAttribute("aria-label");
        tooltip.style.removeProperty("display"); // Show the Tooltip
        tooltip_width = tooltip.getBoundingClientRect().width;
        tooltip.style.setProperty("left", tooltip_horiz_cen - tooltip_width / 2 + "px");
        btn.removeAttribute("title");
    } else { // Hide
        tooltip.style.setProperty("display", "none");
        tooltip_text.innerHTML = "";
        btn.setAttribute("title", btn.getAttribute("aria-label"));
    }
}

function createResize() {
    var ytd = {
        height: movie_player.clientHeight,
        width: movie_player.clientWidth,
    };
    ytd_video.player_.setInternalSize(ytd.width, ytd.height);
    return;
}

function buttonScript() {
    var key_script = `
          function keyPress() {
            document.addEventListener("keydown", function(e) {
                if (e.altKey || e.ctrlKey || e.metaKey || e.shiftKey) return;
                if (/^(?:input|textarea|select|button)$/i.test(e.target.tagName)) return;
                if (/(?:contenteditable-root)/i.test(e.target.id)) return;
                    if (e.key == "` + shortcut_key.toLowerCase() + `" || e.key == "` + shortcut_key.toUpperCase() + `") {
                        e.preventDefault();
                        e.stopPropagation();
                        document.getElementById("ytd-player").focus();
                        resizeScript();
                    }
                    return;
            });
            document.querySelector(".ytp-right-controls > .ytp-resize-button.ytp-button").onclick = function foo() {
                resizeScript();
            };
        }
        function resizeScript() {
            let splayer = document.getElementById("small-player");
            let ytvideo = document.getElementById("ytd-player");
            let ytplayer = document.getElementById("movie_player");
            if (document.head.contains(splayer)) {
                splayer.parentNode.removeChild(splayer);
                ytvideo.player_.setInternalSize(ytplayer.clientWidth, ytplayer.clientHeight);
            } else {
                var head = document.getElementsByTagName("head")[0];
                var newCss = document.createElement("style");
                newCss.type = "text/css";
                newCss.setAttribute("id", "small-player");
                newCss.innerHTML = "ytd-watch-flexy[flexy_] #primary.ytd-watch-flexy:not([theater]):not([fullscreen]) {max-width: calc(`+max_width+`px * `+aspect_ratio+`) !important;}";
                head.appendChild(newCss);
                ytvideo.player_.setInternalSize(ytplayer.clientWidth, ytplayer.clientHeight);
            }
        }
        if (key_done == false) {
            keyPress();
            key_done = true;
        }`;
    injectJs(key_script);
}

/*Create Resize Button*/
function controlResize() {
    if (!button_done) {
        var abtn = document.querySelector("#movie_player > div.ytp-chrome-bottom > div.ytp-chrome-controls > div.ytp-right-controls");
        var btn = document.createElement("button");
        btn.innerHTML = '<svg height="100%" version="1.1" viewBox="0 0 36 36" width="100%"><use class="ytp-svg-shadow" ></use>\
                         <path d="M25,17 L25,17 L25,17 Z M29,25 L29,10.98 C29,9.88 28.1,9 27,9 L9,9 C7.9,9 7,9.88 7,10.98 L7,25\
                                  C7,26.1 7.9,27 9,27 L27,27 C28.1,27 29,26.1 29,25 L29,25 Z M27,25.02 L9,25.02 L9,10.97 L27,10.97\
                                  L27,25.02 L27,25.02 Z" fill="#fff" fill-rule="evenodd" >\
                         </path></svg></button>';
        btn.className += "ytp-resize-button ytp-button";
        btn.setAttribute("id", "ytp-resize-button");
        btn.setAttribute("data-tooltip-target-id", "ytp-resize-button");
        btn.setAttribute("aria-label", "Resize (" + shortcut_key + ")");
        btn.setAttribute("title", "Resize (" + shortcut_key + ")");
        abtn.insertBefore(btn, abtn.lastChild);

        buttonScript(); // Inject button script

        /*Tooltip Event Handlers*/
        btn.addEventListener("mouseover", function() {
            show_resize_button_tooltip(btn, true);
        });
        btn.addEventListener("mouseout", function() {
            show_resize_button_tooltip(btn, false);
        });
        btn.addEventListener("focus", function() {
            show_resize_button_tooltip(btn, true);
        });
        btn.addEventListener("blur", function() {
            show_resize_button_tooltip(btn, false);
        });

        button_done = true
        return;
    }
}

/*Viewport Observer*/
function viewObserver() {
    let resizeObserver = new ResizeObserver((entries) => {
        window.requestAnimationFrame(() => {
            if (!Array.isArray(entries) || !entries.length) { // Check Animation Frame
                return;
            }
            for (let entry of entries) {
                if (isInViewport(video, ytd_flexy) && !isCentered(video, movie_player)) { // Check Top Viewport and Centered
                    if (!isInViewport(video, movie_player) || !scrub_bool) { // Check Video Player Size and Scrubber
                        if (entry.contentRect.height != max_width) { // Check Max Width
                            createResize();
                        }
                    }
                }
            }
        });
        for (let entry of entries) {console.log("Player Size: " + entry.contentRect.height + " x " + entry.contentRect.width);}
    });

    // observe the given element for changes
    resizeObserver.observe(video);
}

/*Saves Size Setting*/
function sizeObserver() {
    // Select the node that will be observed for mutations
    const targetNode = document.head;
    // Options for the observer (which mutations to observe)
    const config = {
        attributes: true,
        childList: true,
        subtree: true
    };

    // Callback function to execute when mutations are observed
    const callback = function(mutationsList, observer) {
        // Use traditional 'for loops' for IE 11
        for (let mutation of mutationsList) {
            if (mutation.removedNodes.length >= 1) {
                if (mutation.removedNodes[0].id == "small-player") {
                    set_pref("yt-resize", false); // Set resize to false
                }
            } else if (mutation.addedNodes.length >= 1) {
                if (mutation.addedNodes[0].id == "small-player") {
                    set_pref("yt-resize", true); // Set resize to true
                }
            }
        }
    };

    // Create an observer instance linked to the callback function
    const observer = new MutationObserver(callback);

    // Start observing the target node for configured mutations
    observer.observe(targetNode, config);
}

function autoResizeVideo() {
    if (outer !== "null") {
        injectJs('let key_done = false;'); // Global Variable
        scrubListener(); // Add Scrubber Listener
        sizeObserver(); // Size Observer
        viewObserver(); // Resize Observer
        window.addEventListener("yt-action", () => { // Adds Resize Button
            if (window.location.href.indexOf('youtube.com/watch') != -1) {
                if (video !== "null" && !resize_done) {
                    controlResize();
                    resize_done = true;
                }
            }
        });
        video.addEventListener("canplay", () => { // Resize on video load
           setTimeout(function(){
               createResize();
           }, 500);
        });
        window.addEventListener("fullscreenchange", () => {
            if (!document.fullscreenElement) { // Check if leaving fullscreen
                createResize();
            }
        });
    } else {
        alert("player-container-outer not found");
    }
}

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