Crops the top and bottom to fit ultrawide
// ==UserScript==
// @name YouTube Ultrawide
// @version 0.1
// @description Crops the top and bottom to fit ultrawide
// @author uxamend (modified by C4illin)
// @match https://www.youtube.com/*
// @match https://www.youtube-nocookie.com/embed/*
// @exclude-match https://www.youtube.com/ad_frame*
// @exclude-match https://www.youtube.com/ad_companion*
// @exclude-match https://www.youtube.com/embed/
// @exclude-match https://www.youtube.com/video_masthead*
// @icon https://raw.githubusercontent.com/C4illin/Userscripts/master/Youtube-Ultrawide/icon.png
// @grant none
// @run-at document-idle
// @license CC0-1.0
// @compatible firefox version >=64 (older versions untested)
// @compatible chrome version >=71 (older versions untested)
// @namespace https://gf.qytechs.cn/users/217869
// ==/UserScript==
// 100% credit to uxamend: (I just changed a couple values to reverse everything)
// https://gf.qytechs.cn/sv/scripts/375648-zoom-and-crop-youtube-videos-to-fill-screen-height
"use strict"
// ==================================
// User-defined global parameters
// ==================================
// For wide screens: Sets the widest aspect ratio that videos will ever be
// cropped to.
var max_cropped_aspect = 21/9 // Express as a fraction, e.g. 21/9, not 21:9.
// Sets the aspect ratio of the player for using zoom outside of full-screen.
// This has no effect in full-screen mode.
// To use the screen aspect ratio as the player aspect ratio, set this to zero.
var player_aspect = 0 // Set to zero or a fraction, e.g. 16/9, not 16:9.
// Default zoom state outside full-screen (true = enabled, false = disabled)
var def_zoom_n = false
// Default zoom state in full-screen (true = enabled, false = disabled)
var def_zoom_f = false
// Sets which key will be used to enable and disable zoom
var zoom_shortcut_key = "z"
// ==================================
var debug_logging_on = false
var debug_script_name = "Userscript: Zoom YouTube videos to fill screen width"
function debug_log(message) {
if(debug_logging_on){
console.log("[" + debug_script_name + "] " + message)
}
}
/**
* set_zoom
* Zooms a specified video to fill specified containing area dimensions.
* Parameters:
* video video to zoom
* cw containing area width
* ch containing area height
* Global parameters read:
* max_cropped_aspect minimum aspect ratio to crop videos down to
*/
function set_zoom(video, cw, ch) {
var vs = video.style
var video_aspect = video.videoWidth/video.videoHeight
var containing_aspect = cw/ch
// Don't zoom if the endscreen is showing
if(!video.ended) {
// Only zoom and crop videos that are wide enough to crop
if(video_aspect < containing_aspect && video_aspect < max_cropped_aspect) {
debug_log("Video is wider than containing area and max_cropped_aspect. Setting zoom.")
var vw = cw // vh = video height
// Apply max_cropped_aspect constraint to video width
if (max_cropped_aspect < containing_aspect) {
vh = cw/max_cropped_aspect
debug_log("max_cropped_aspect reached: " + max_cropped_aspect)
}
var vh = video_aspect * vw // vw = video width (including cropped portion)
var vt = (ch-vh)/2 // vt = top edge position of video
var vl = (cw-vw)/2 // vl = left edge position of video
debug_log("Containing area dimensions: " + cw + "x" + ch + "." + "Aspect: " + containing_aspect)
// debug_log("Calculated new video element dimensions: " + vw + "x" + vh + ", origin at " + vl + ", " + vt + ".")
// debug_log("(Underlying video stream resolution: " + video.videoWidth + "x" + video.videoHeight + ".)")
debug_log("max_cropped_aspect: " + max_cropped_aspect + "." )
debug_log("video_aspect: " + video_aspect + ".")
// This might appear to risk creating an endless loop via the mutation
// observer. However, it doesn't. I'm guessing that changing the dimensions
// doesn't constitute a mutation, but if it does it can result in at most one
// superfluous execution of set_zoom(). If the first execution causes a
// mutation by changing the video element's dimensions, then the second
// execution, if it is surplus to requirements, should set them to the same
// values, resulting in no mutation and no third execution (until genuinely
// needed).
vs.height = vh + "px"
vs.width = vw + "px"
vs.top = vt + "px"
vs.left = vl + "px"
} else {
debug_log("Video is not wide enough to require zoom ("
+ video.videoWidth
+ "x"
+ video.videoHeight
+ "). Not setting zoom.")
unzoom(video, cw, ch)
}
} else {
debug_log("Video has ended. Not setting zoom. (Otherwise we mess with the endscreen.)")
}
}
/**
* unzoom
* Undoes the visual effects of set_zoom.
* Note that unzoom does not gurantee to return the video dimensions exactly to
* their original values, but the visual appearance should be the same (or near
* enough as makes no odds).
* Parameters:
* video video to unzoom
* cw containing area width
* ch containing area height
*/
function unzoom(video, cw, ch) {
// It would be better to somehow trigger YouTube's standard video sizing, but
// in the absence of a way to trigger that, we'll just do this.
var vs = video.style
var video_aspect = video.videoWidth/video.videoHeight
var containing_aspect = cw/ch
// Don't unzoom if the endscreen is showing
if(!video.ended) {
debug_log("Unzooming video.")
// Usually the player is sized to fit the video exactly in default view,
// but not for narrow videos, which are pillarboxed with white bars. Rarely,
// the player defaults to 16:9 for all videos, so that wide videos are
// letterboxed with white bars.
//
// In theater mode and full-screen mode, the player has a fixed aspect and
// the video is letter- or pillarboxed with black bars if it doesn't fit
// exactly.
//
// To avoid black bars in default view, we must size the video to fill the
// container in the video's longest dimension only. (Otherwise we could
// just size it to fill the container in both dimensions.)
var w, h, t, l
if(video_aspect == containing_aspect) {
// video that fits the container exactly
w = cw; h = ch; t = 0; l = 0
} else if(video_aspect > containing_aspect) {
// letterboxed video
w = cw; l = 0
h = cw / video_aspect
t = (ch - h) / 2
} else {
// pillarboxed video
h = ch; t = 0
w = ch * video_aspect
l = (cw - w) / 2
}
vs.width = w + "px"
vs.height = h + "px"
vs.top = t + "px"
vs.left = l + "px"
} else {
debug_log("Video has ended. Not unzooming. (Otherwise we mess with the endscreen.)")
}
}
/**
* in_theater_mode
* Returns true if we're in Theater mode.
*/
function in_theater_mode() {
return (document.getElementById("player-theater-container") &&
document.getElementById("player-theater-container").childElementCount > 0 &&
!document.fullscreenElement)
}
/**
* set_player_aspect
* Changes the aspect ratio of the video player element to the specified aspect
* ratio, as interpreted by YouTube's default CSS.
* Parameters:
* aspect aspect ratio to use
* theater_default if true, set theater mode to the default aspect ratio
* instead of the specified aspect ratio
*/
function set_player_aspect(aspect, theater_default=false) {
debug_log("Setting player aspect to " + aspect + ".")
// We need to set overflow to hidden on the movie-player otherwise the video
// overhangs in miniplayer mode. Get it by class name rather than id, for
// compatibility with embedded videos
document.getElementsByClassName("html5-video-player")[0].style.setProperty("overflow", "hidden")
// For embedded videos, we don't need to do anything.
// For default view
if(document.getElementsByTagName("ytd-watch-flexy")[0]) {
var ytdwfs = document.getElementsByTagName("ytd-watch-flexy")[0].style
ytdwfs.setProperty("--ytd-watch-flexy-width-ratio", aspect)
ytdwfs.setProperty("--ytd-watch-flexy-height-ratio", 1)
}
// For theater mode
var ptc = document.getElementById("player-theater-container")
if(in_theater_mode() && !theater_default) {
debug_log("Setting theater mode height.")
// 56px for masthead; --ytd-masthead-height is not always set, so can't use
// that unfortunately
ptc.style.setProperty("max-height", "calc(100vh - 56px)")
ptc.style.setProperty("height", "calc((" + (1/aspect) + ") * 100vw)")
} else {
debug_log("Unsetting theater mode height.")
if(ptc) {
ptc.style.removeProperty("max-height")
ptc.style.removeProperty("height")
}
}
}
/**
* apply_player_aspect
* To facilitate zoom and crop when the movie_player is not full-screen, this sets
* the aspect ratio of the movie_player to follow the player_aspect setting.
* Calling with the zoom parameter set to false returns the player to the YouTube
* default of matching the video aspect ratio.
* Parameters:
* zoom if true, use player_aspect
* if false, use the actual video aspect (YouTube default)
* Global parameters read:
* player_aspect the aspect ratio to use, or zero (indicating to use the
* screen aspect)
*/
function apply_player_aspect(zoom=true) {
var video = document.getElementsByClassName("html5-main-video")[0]
var video_aspect = video.videoWidth/video.videoHeight
if(zoom) {
if(player_aspect == 0) {
debug_log("Adjusting player aspect ratio to match screen.")
var screen_aspect = window.screen.width/window.screen.height
if(video_aspect > screen_aspect) {
set_player_aspect(screen_aspect)
} else {
debug_log("No need to change player aspect; video is not wide enough.")
}
} else {
debug_log("Adjusting player aspect ratio to configured value.")
if(video_aspect > player_aspect) {
set_player_aspect(player_aspect)
} else {
debug_log("No need to change player aspect; video is not wide enough.")
}
}
} else {
debug_log("Restoring player aspect ratio to match video.")
set_player_aspect(video_aspect, true)
// N.B. If video_aspect is narrow, the expected behaviour of set_player_aspect
// is that YouTube's CSS may result in the video being pillarboxed, due to the
// maximum height constraint.
}
}
/**
* set_zoom_to_window
* Zooms a video to fill the window dimensions.
* Parameters:
* video the video to set zoom for
* zoom if false, will unzoom instead of setting zoom
* Global parameters read:
* max_cropped_aspect minimum aspect ratio to crop videos down to
*/
function set_zoom_to_window(video, zoom=true) {
if(zoom) {
set_zoom(video,
window.innerWidth,
window.innerHeight)
} else {
unzoom(video,
window.innerWidth,
window.innerHeight)
}
}
/**
* set_zoom_to_movie_player
* Zooms a video to fill its containing movie_player element in the DOM. When not in
* full-screen mode, also changes the size of the movie_player to follow the
* player_aspect setting (else there'll be no zoom and crop).
* Parameters:
* video the video to set zoom for
* zoom if false, will unzoom instead of setting zoom
* Global parameters read:
* max_cropped_aspect minimum aspect ratio to crop videos down to
* player_aspect aspect ratio setting for non-full-screen movie_player
*/
function set_zoom_to_movie_player(video, zoom=true) {
if(!document.fullscreenElement) {
// The movie_player is the grandparent node of the video element.
// Open question: Is it more likely for the ID of the relevant element to
// change (so that selecting it as the grandparent is the best strategy), or
// for its position in the DOM tree to change (so that selecting it by ID is
// the best strategy)?
if(zoom) {
apply_player_aspect(true)
set_zoom(video,
video.parentNode.parentNode.clientWidth,
video.parentNode.parentNode.clientHeight)
} else {
unzoom(video,
video.parentNode.parentNode.clientWidth,
video.parentNode.parentNode.clientHeight)
}
} else {
apply_player_aspect(false)
// In full-screen mode, the movie-player is not necessarily the same size as
// the screen, which can cause a slight offset. Use set_zoom_to_window instead
// for this case.
set_zoom_to_window(video, zoom)
}
zoom_button.update()
}
/**
* mo_callback
* Callback function for mutation observer, to re-apply zoom if the video element
* mutates. E.g. when an ad starts or stops playing, or in other circumstances
* when the video might change dimensions or become reset to its default,
* letterboxed state.
*/
function mo_callback(mutation_list, observer) {
mutation_list.forEach((mutation) => {
if(mutation.type == "attributes"){
// We have to check whether zoom "should" be on, because the
// fullscreenchange event may not be fast enough, in which case we will
// catch the mutations caused by exiting full-screen.
if(zoom_should_be_on()) {
debug_log("Video element mutated.")
set_zoom_to_movie_player(mutation.target)
} else {
debug_log("Video element mutated but zoom should be off.")
zoom_off()
}
}
})
}
var mo = new MutationObserver(mo_callback)
function observe_video_mutations(video) {
mo.observe(video, {"attributes" : true})
}
/**
* zoom_on
* Unconditionally apply zoom and keep it applied until zoom_off is called.
*/
function zoom_on() {
debug_log("Turning zoom on.")
var video = document.getElementsByClassName("html5-main-video")[0]
set_zoom_to_movie_player(video)
observe_video_mutations(video)
}
/**
* zoom_off
* Unconditionally stop applying zoom, until zoom_on is called.
*/
function zoom_off() {
debug_log("Turning zoom off.")
mo.disconnect()
var video = document.getElementsByClassName("html5-main-video")[0]
apply_player_aspect(false)
set_zoom_to_movie_player(video, false)
}
// Manual zoom state outside full-screen
var man_enab_n = def_zoom_n
// Manual zoom state in full-screen
var man_enab_f = def_zoom_f
/**
* zoom_should_be_on
* Returns true if we're in a state where zoom is supposed to currently be
* enabled, else false.
*/
function zoom_should_be_on() {
return ((man_enab_n && !document.fullscreenElement)
|| (man_enab_f && document.fullscreenElement))
}
/**
* zoom_on_or_off
* Puts zoom into the correct on/off state, as per zoom_should_be_on.
*/
function zoom_on_or_off() {
if(zoom_should_be_on()) {
setTimeout(zoom_on, 200)
} else {
zoom_off()
}
}
/**
* toggle_manual_enab
* Changes the manual override zoom state for the current display mode; either
* full-screen or non-full-screen.
*/
function toggle_manual_enab() {
debug_log("Toggling manual enable state.")
if(document.fullscreenElement){
man_enab_f = !man_enab_f
if(man_enab_f) debug_log("Set full-screen zoom enabled.")
else debug_log("Set full-screen zoom disabled.")
} else {
man_enab_n = !man_enab_n
if(man_enab_n) debug_log("Set non-full-screen zoom enabled.")
else debug_log("Set non-full-screen zoom disabled.")
}
zoom_on_or_off()
}
/**
* handle_keydown
* Event handler for any keydown events, to trigger appropriate actions.
*/
function handle_keydown(e) {
debug_log('"' + e.key + '" key was pressed.')
if(e.key == zoom_shortcut_key.toLowerCase()) toggle_manual_enab()
if(e.key == zoom_shortcut_key.toUpperCase()) toggle_manual_enab()
if(e.key == "i") {
// Workaround for bug: exiting miniplayer directly into normal view does not
// trigger reapplication of zoom. Pressing 'i' seems to be the only way to
// trigger this bug, so detecting the pressing of 'i' seems like a good way
// to fix it.
zoom_on_or_off()
}
}
/**
* watch_for_fullscreen
* Start watching for changes to the full-screen state, and make sure the correct
* zoom state is applied at each transition of full-screen state.
* N.B. There may be a slight delay in reaction to changes in full-screen state.
*/
function watch_for_fullscreen() {
debug_log("Adding fullscreenchange event listener.")
document.addEventListener(
'fullscreenchange',
function() {
debug_log("Full-screen state changed.")
zoom_on_or_off()
}
)
}
/**
* watch_for_keypresses
* Start watching for keydown events and handle them when they occur.
*/
function watch_for_keypresses() {
debug_log("Adding keydown event listener.")
document.addEventListener(
'keydown',
handle_keydown
)
}
/**
* create_zoom_button
* Adds a zoom button to the YouTube player controls, which toggles manual override of
* zoom state.
* Returns:
* an object representing the button
*/
function create_zoom_button() {
var right_controls
var size_button
var tooltip_showing = false
var button
var icon_path
/**
* set_zoom_button_mode
* Sets the zoom button to an appropriate mode for the current zoom state.
*/
function set_zoom_button_mode() {
var l
if(zoom_should_be_on()) {
icon_path.setAttribute("d",
"m 8,11 0,14 20,0 0,-14 -20,0 z m 2,4 16,0 0,6 -16,0 0,-6 z"
)
l = "Normal (" + zoom_shortcut_key + ")"
} else {
icon_path.setAttribute("d",
"m 4,11 0,14 3,0 0,-2 -1,0 0,-10 1,0 0,-2 -3,0 z\
m 4,0 0,14 20,0 0,-14 -20,0 z\
m 21,0 0,2 1,0 0,10 -1,0 0,2 3,0 0,-14 -3,0 z\
m -19,2 16,0 0,10 -16,0 0,-10 z"
)
l = "Widescreen (" + zoom_shortcut_key + ")"
}
button.setAttribute("aria-label", l)
button.setAttribute("title", l)
}
/**
* create_zoom_button_icon
* Adds the icon to the zoom button during initial creation of the button.
*/
function create_zoom_button_icon() {
// Create icon SVG element
var s = document.createElementNS("http://www.w3.org/2000/svg", "svg")
s.setAttribute("height", "100%")
s.setAttribute("version", "1.1")
s.setAttribute("viewBox", "0 0 36 36")
s.setAttribute("width", "100%")
var p_id = "zac-path-1"
// Apply shadow
var sh = document.createElementNS("http://www.w3.org/2000/svg", "use")
sh.setAttribute("class", "ytp-svg-shadow")
sh.setAttribute("href", "#" + p_id)
// Create icon path
var p = document.createElementNS("http://www.w3.org/2000/svg", "path")
p.setAttribute("id", p_id)
p.setAttribute("class", "ytp-svg-fill")
// Append path and shadow to SVG
s.appendChild(sh)
s.appendChild(p)
// Append icon to button
button.appendChild(s)
icon_path = p
}
/**
* show_zoom_button_tooltip
* Shows the tooltip associated with the zoom button in a style mimicking that
* of the other YouTube player buttons.
* Parameters:
* show if false, the tooltip will be hidden instead of shown
*/
function show_zoom_button_tooltip(show=true) {
// Position calculations
var bbcr = button.getBoundingClientRect()
var tt_horiz_cen = bbcr.left + bbcr.width/2 // tooltip horizontal centre
var tt_top_offset = 57 // How far above the button should the tooltip be?
// For some reason, the existing tooltips are at a different offset in full-screen.
if(document.fullscreenElement) {
tt_top_offset = 75
}
var tt_top = bbcr.top + bbcr.height/2 - tt_top_offset // tooltip top
// YouTube has an existing tooltip DOM structure that it reuses for all of its
// player tooltips, but it's easier and more reliable to just create our own,
// using the same classes.
// Try to get our existing tooltip from DOM from previous run
var tt = document.getElementById("zac-tt")
var tt_text
if(!tt) {
// Create tool-tip DOM structure if not present.
var mp = document.getElementsByClassName("html5-video-player")[0]
var tt_text_wrapper = document.createElement("div")
tt = document.createElement("div")
tt_text = document.createElement("span")
tt.setAttribute("class", "ytp-tooltip ytp-bottom")
tt.setAttribute("id", "zac-tt")
tt.style.setProperty("position", "fixed")
tt_text_wrapper.setAttribute("class", "ytp-tooltip-text-wrapper")
tt_text.setAttribute("class", "ytp-tooltip-text")
tt_text.setAttribute("id", "zac-tt-text")
tt.appendChild(tt_text_wrapper)
tt_text_wrapper.appendChild(tt_text)
mp.appendChild(tt)
} else {
// If DOM structure already present, get tooltip text.
tt_text = document.getElementById("zac-tt-text")
}
if(show) { // show
tt.style.setProperty("top", tt_top + "px")
tt_text.innerHTML = button.getAttribute("aria-label")
tt.style.removeProperty("display") // show the tooltip
// Calculate horizontal position. Tooltip must be showing before
// its width can be queried.
var tt_width = tt.getBoundingClientRect().width
tt.style.setProperty("left", tt_horiz_cen - tt_width / 2 + "px")
debug_log("tt_width = " + tt_width)
debug_log("tt_horiz_cen = " + tt_horiz_cen)
debug_log("tt left position = " + (tt_horiz_cen - tt_width / 2))
// Remove button title, else the browser may (will) display it as a
// tooltip, in addition to ours.
button.removeAttribute("title")
} else { // hide
tt.style.setProperty("display", "none")
tt_text.innerHTML = ""
button.setAttribute("title", button.getAttribute("aria-label"))
}
tooltip_showing = show
// All of that just for a tooltip that matches the others. And it's
// still not perfect. Sheesh.
}
/**
* update
* Ensures the zoom button reflects the current state.
*/
function update() {
set_zoom_button_mode()
show_zoom_button_tooltip(tooltip_showing)
}
var button_object
function add_button() {
right_controls = document.getElementsByClassName("ytp-right-controls")[0]
size_button = document.getElementsByClassName("ytp-size-button") [0]
if(right_controls && size_button) {
debug_log("Adding zoom and crop toggle button.")
// Remove existing button if present (sometimes it persists even after a page reload)
var existing_button = document.getElementById("zac-zoom-button")
if(existing_button) {
debug_log("Destroying old zoom and crop toggle button.")
right_controls.removeChild(existing_button)
}
// Create button
button = document.createElement("button")
button.setAttribute("class", "ytp-button")
button.setAttribute("id", "zac-zoom-button")
create_zoom_button_icon()
set_zoom_button_mode()
// Add button to controls
right_controls.insertBefore(button, size_button)
// Set event handlers
button.addEventListener("click", toggle_manual_enab)
button.addEventListener("mouseover", function(){show_zoom_button_tooltip()})
button.addEventListener("mouseout", function(){show_zoom_button_tooltip(false)})
button.addEventListener("focus", function(){show_zoom_button_tooltip()})
button.addEventListener("blur", function(){show_zoom_button_tooltip(false)})
button_object = {
update : update
}
} else {
// Keep trying until we have somewhere to put the button.
debug_log("Can't add zoom and crop toggle button yet. Retrying in 200ms.")
setTimeout(add_button, 200)
}
}
add_button()
return button_object
}
// Initialise
watch_for_fullscreen()
watch_for_keypresses()
var zoom_button = create_zoom_button()
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