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add video controls to 9gag gif and video post. Add volume slider on chrome browser
// ==UserScript==
// @name 9gag show video control
// @namespace http://javalatte.xyz
// @version 1.5.2
// @description add video controls to 9gag gif and video post. Add volume slider on chrome browser
// @grant GM_addStyle
// @grant GM_getValue
// @grant GM_setValue
// @require http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js
// @author Akzn
// @match https://9gag.com/*
// ==/UserScript==
'use strict';
var timer;
var isChrome = !!window.chrome && !!window.chrome.webstore;
var isFirefox = (navigator.userAgent.indexOf("Firefox") != -1)? true : false;
//--- CSS styles
//--- Button autoplay
GM_addStyle (".gmPersistentButton {background: var(--palette-primary);position: fixed;bottom: 1em;right: 1em;z-index: 6666;border-radius: 18px;}.gmPersistentButton button {cursor: pointer;background: var(--palette-primary);color: white;font-size: 14px;font-style: normal;font-weight: 700;line-height: 20px;letter-spacing: 0em;bottom: 1em;right: 1em;z-index: 6666;padding: 1em;border: var(--palette-primary);border-radius: 18px;opacity: 0.8;}.gmPersistentButton:hover, .gmPersistentButton button:hover {background-color: var(--palette-primary-hover);}");
// Slider for chrome
if(isChrome==true){
GM_addStyle (".div-slider {opacity: 0;text-align: center;padding-top: 5px;width: 29px;height: 120px;position: absolute;bottom: 50px;right: 24px;cursor: pointer;z-index: 99999;border-radius: 15px;background-color: rgba(0, 0, 0, 0.8);}");
GM_addStyle(".volume-slider{-webkit-appearance: slider-vertical;width: 30px;height: 160px;position: absolute;top: 12px;right: 0px;cursor: pointer;z-index: 99999;height: 100px;width: 2px;margin: auto 13px;}");
}
//--- Add the button.
$("body").append (
'<div class="gmPersistentButton">'
+ '<button id="gmAutoplayVideoBtn">Init failed!</button></div>'
);
//--- Define and init the matching control object:
var btnControl = new PersistentButton (
"gmAutoplayVideoBtn", //-- HTML id
"StopContinueBtn", //-- Storage label
["Autoplay Video : Off", "Autoplay Video : On"], //-- Text that the button cycles through
[false, true] //-- Matching values for the button's states
);
//--- Activate the button click-handler.
$("#gmAutoplayVideoBtn").click ( function () {
btnControl.SetNextValue ();
var btnValue = this.value;
keepgoing = btnValue
_handlegmAutoplayVideoBtnClick(keepgoing)
} );
//--- Button object
function PersistentButton (htmlID, setValName, textArry, valueArry) {
//--- Initialize the button to last stored value or default.
var buttonValue = valueArry[0];
fetchValue ();
storeValue (); //-- Store, in case it wasn't already.
setButtonTextAndVal ();
//--- DONE with init. Set click and keyboard listeners externally.
//***** Public functions:
this.Reset = function () {
buttonValue = valueArry[0];
storeValue ();
setButtonTextAndVal ();
};
this.SetNextValue = function () {
var numValues = valueArry.length;
var valIndex = 0;
for (var J = numValues - 1; J >= 0; --J) {
if (buttonValue == valueArry[J]) {
valIndex = J;
break;
}
}
valIndex++;
if (valIndex >= numValues)
valIndex = 0;
buttonValue = valueArry[valIndex];
storeValue ();
setButtonTextAndVal ();
};
//***** Private functions:
function fetchValue () {
buttonValue = GM_getValue (setValName, buttonValue);
}
function storeValue () {
GM_setValue (setValName, buttonValue);
}
function setButtonTextAndVal () {
var buttonText = "*ERROR!*";
for (var J = valueArry.length - 1; J >= 0; --J) {
if (buttonValue == valueArry[J]) {
buttonText = textArry[J];
break;
}
}
var theBtn = document.getElementById (htmlID);
if (theBtn) {
theBtn.textContent = buttonText;
theBtn.setAttribute ("value", buttonValue);
}
else
alert ('Missing persistent button with ID: ' + htmlID + '!');
}
}
//--- Video control
function addVideoControl(){
var vids = document.getElementsByTagName('video');
for( var i = 0; i < vids.length; i++ ){
var elem = vids.item(i);
elem.setAttribute("preload","none")
if(!elem.hasAttribute("controls")){
//--- bind play button
$(elem).bind('play', function (e) {
isViewable = isElementXPercentInViewport(e.target,90)
if (isViewable) {
e.target.setAttribute('pause','false')
}
});
$(elem).bind('pause', function (e) {
e.target.setAttribute('pause','true')
});
elem.setAttribute("controls", "");
elem.volume = 0.5;
setVideoPlay(elem)
// console.log('video controls added');
//add volume slider to chrome video. Why tf chrome dev removed their dafault slider
if((elem.parentNode.parentNode.getElementsByClassName('video-post').length>0) && (isChrome == true)){
var slider = document.createElement("div");
slider.setAttribute("class",'div-slider');
slider.innerHTML = '<input id="vol-control" class="volume-slider" type="range" min="0" max="1" step="0.1"></input>';
elem.parentNode.insertBefore(slider, elem.parentNode.parentNode.nextSibling);
var nSlider = elem.parentNode.parentNode.parentNode.getElementsByTagName('input');
nSlider[0].addEventListener("input",setVolume,false);
nSlider[0].addEventListener("change",setVolume,false);
nSlider[0].elem = elem;
nSlider[0].value = elem.volume;
elem.slider = nSlider[0];
elem.addEventListener("mouseover",sliderIn,false);
elem.addEventListener("mouseout",sliderOut,false);
nSlider[0].slider = nSlider[0];
nSlider[0].addEventListener("mouseover",sliderIn,false);
nSlider[0].addEventListener("mouseout",sliderOut,false);
}
}
if ($("#gmAutoplayVideoBtn").val() == "false") {
// to handle 9gag very own autoplay js
if(elem.getAttribute("pause")=='true'){
elem.pause();
}
}
elem.addEventListener("click",handlePauseElem,false)
if(elem.parentNode.querySelector('.presenting')){
elem.parentNode.querySelector('.presenting').addEventListener("click",handlePausePlayButton,false)
}
if(elem.parentNode.parentNode.querySelector('.video-post')){
elem.parentNode.parentNode.querySelector('.video-post').addEventListener("click",handlePauseBox,false)
}
if(elem.parentNode.parentNode.querySelector('.gif-post')){
elem.parentNode.parentNode.querySelector('.gif-post').addEventListener("click",handlePauseBox,false)
}
}
}
function sliderIn(evt){
evt.target.slider.parentNode.style.opacity = 1;
}
function sliderOut(evt){
evt.target.slider.parentNode.style.opacity = 0;
}
function setVolume(evt){
var elem = evt.target.elem;
elem.volume = evt.target.value;
elem.muted = false;
}
function handlePauseBox(evt){
var elem = evt.target;
setVideoPlay(elem.getElementsByTagName('video')[0])
}
function handlePausePlayButton(evt){
var elem = evt.target;
setVideoPlay(elem.parentNode.parentNode.getElementsByTagName('video')[0])
}
function handlePauseElem(evt){
var elem = evt.target;
setVideoPlay(elem)
}
function setVideoPlay(elem,buttonStorageValue = null){
if (buttonStorageValue == null) {
if ($("#gmAutoplayVideoBtn").val() == "true") {
elem.setAttribute("pause", "false");
} else {
if(elem.getAttribute("pause")=='true'){
elem.setAttribute("pause", "false");
} else {
elem.setAttribute("pause", "true");
}
}
} else {
if (buttonStorageValue == 'false') {
elem.setAttribute("pause", "true");
elem.pause()
} else if(buttonStorageValue == 'true'){
elem.setAttribute("pause", "false");
elem.play()
}
}
}
// TO check viewbility
const isElementXPercentInViewport = function(el, percentVisible) {
let
rect = el.getBoundingClientRect(),
windowHeight = (window.innerHeight || document.documentElement.clientHeight);
return !(
Math.floor(100 - (((rect.top >= 0 ? 0 : rect.top) / +-rect.height) * 100)) < percentVisible ||
Math.floor(100 - ((rect.bottom - windowHeight) / rect.height) * 100) < percentVisible
)
};
// handle toggle autoplay
function _handlegmAutoplayVideoBtnClick(value){
var vids = document.getElementsByTagName('video');
for( var i = 0; i < vids.length; i++ ){
var elem = vids.item(i);
setVideoPlay(elem,value)
}
console.log('autoplay : '+value)
}
timer = setInterval(addVideoControl, 300);