Improves the YouTube experience by maximizing video player real-estate and fixing some common annoyances.
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// ==UserScript==
// @name YouTube Cinema Mode
// @description Improves the YouTube experience by maximizing video player real-estate and fixing some common annoyances.
// @license MIT
// @match https://www.youtube.com/*
// @version 0.1.9
// @run-at document-start
// @grant none
// @require https://code.jquery.com/jquery-2.1.4.min.js
// @namespace https://greasyfork.org/en/users/4614
// ==/UserScript==
////////////////////////////////////////////////////////////////
// Main Operations
////////////////////////////////////////////////////////////////
// Detect the type of YouTube page loaded
var isWatchPage = location.href.indexOf("https://www.youtube.com/watch?") === 0;
// Start or install operation handlers
onDocumentStart();
$(document).on("ready", onDocumentEnd);
$(window).on("load", onWindowLoad);
// Operations that are run as early as possible during page load
function onDocumentStart()
{
installUnsafewindowPolyfill();
disableSPF();
if (isWatchPage)
{
disableMatchMedia();
installFullSizePlayerStylesheet();
}
}
// Operations that run when DOMContentLoaded event is fired
function onDocumentEnd()
{
if (isWatchPage)
{
installTopBarAutohide();
expandVideoDescription();
}
installPlayerAutoPause();
}
// Operations that run when window is loaded (after YouTube scripts are run)
function onWindowLoad()
{
if (isWatchPage)
{
setTimeout(switchPlayerToTheaterMode, 2000);
}
}
////////////////////////////////////////////////////////////////
// Methods
////////////////////////////////////////////////////////////////
// Ensure unsafeWindow object is available both in firefox and chrome
function installUnsafewindowPolyfill()
{
if (typeof unsafeWindow === 'undefined')
{
if (typeof XPCNativeWrapper === 'function' && typeof XPCNativeWrapper.unwrap === 'function')
unsafeWindow = XPCNativeWrapper.unwrap(window);
else if (window.wrappedJSObject)
unsafeWindow = window.wrappedJSObject;
}
}
// Disable SPF (Structured Page Fragments), which prevents properly attaching to page load events when navigation occurs
// Will also disable the red loading bar.
function disableSPF()
{
if (unsafeWindow._spf_state && unsafeWindow._spf_state.config)
{
unsafeWindow._spf_state.config['navigate-limit'] = 0;
unsafeWindow._spf_state.config['navigate-part-received-callback'] = function (targetUrl) { location.href = targetUrl; }
}
setTimeout(disableSPF, 50);
}
// Disable matchMedia - allow proper resizing of the video player and its contents.
function disableMatchMedia()
{
window.matchMedia = undefined;
}
// Add full-size player page stylesheet (works correctly only in theater mode).
function installFullSizePlayerStylesheet()
{
$("head").append(
"<style type='text/css'>" +
"body { overflow-x: hidden !important; overflow-y: scroll !important; }" +
"#masthead-positioner-height-offset { display: none }" +
"#masthead-positioner { visibility: hidden; opacity: 0; transition: opacity 0.3s ease-in-out; }" +
".player-width { width: 100% !important; margin: 0px !important; left: 0px !important; right: 0px !important; }" +
".player-height { height: 100vh !important; }" +
"</style>");
}
// Switch player to theater mode if in default mode.
function switchPlayerToTheaterMode()
{
if ($("div#page").hasClass("watch-non-stage-mode"))
$("button.ytp-size-button, div.ytp-size-toggle-large").click();
}
// Auto shows/hides the top bar when mouse enters/leaves (for use with watch pages).
function installTopBarAutohide()
{
var topBarHoverTimeout;
function cancelTopBarHoverTimeout()
{
if (topBarHoverTimeout)
{
clearTimeout(topBarHoverTimeout);
topBarHoverTimeout = undefined;
}
}
$(document).mouseleave(function (e)
{
cancelTopBarHoverTimeout()
});
$(document).mousemove(function (e)
{
if (e.pageY < 35)
{
var topBar = $("#masthead-positioner");
if (!topBarHoverTimeout && topBar.css("visibility") === "hidden")
{
topBarHoverTimeout = setTimeout(function ()
{
topBar.css("visibility", "visible");
topBar.css("opacity", "1");
$("div#player-api, div#content").one("mouseenter", function ()
//topBar.mouseleave(function ()
{
topBar.css("opacity", "0");
topBar.css("visibility", "hidden")
});
}, 500);
}
}
else
{
cancelTopBarHoverTimeout();
}
});
}
// Expands video description
function expandVideoDescription()
{
$("#action-panel-details").removeClass("yt-uix-expander-collapsed");
}
// Pauses playing videos in other tabs when a video play event is detected (works in both watch and channel page videos)
function installPlayerAutoPause()
{
// Note: the channel page has another hidden video except the main one (if it exists). The hidden video doesn't have an "src" attribute.
var videoPlayer = $('video.html5-main-video').filter(function (index) { return $(this).attr("src") !== undefined});
if (videoPlayer.length === 0)
{
//console.log("Player not found, retrying in 100ms..");
setTimeout(installPlayerAutoPause, 100);
return;
}
var videoPlayerElement = videoPlayer.get(0);
// Generate a random script instance ID
var instanceID = Math.random().toString();
function onVideoPlay()
{
console.log("play event triggered");
unsafeWindow.localStorage["FullSizeYouTubePlayer_PlayingInstanceID"] = instanceID;
function pauseWhenAnotherPlayerStartsPlaying()
{
if (unsafeWindow.localStorage["FullSizeYouTubePlayer_PlayingInstanceID"] !== instanceID)
videoPlayerElement.pause();
else
setTimeout(pauseWhenAnotherPlayerStartsPlaying, 10);
}
pauseWhenAnotherPlayerStartsPlaying();
}
// If video isn't paused on startup, fire the handler immediately
if (!videoPlayerElement.paused)
onVideoPlay();
// Add event handler for the "play" event.
videoPlayer.on("play", onVideoPlay);
}