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content.js
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content.js
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let batteryInfo = null;
let player = null;
let currentUrl = null;
let time = null;
const playerState = {
active: "active",
inactive: "inactive",
passive: "passive",
};
const locationObserver = new MutationObserver(function (mutations) {
const url = location.href;
if (url !== currentUrl) {
currentUrl = url;
playerObserver.disconnect();
observeVideoPlayerView();
}
});
locationObserver.observe(document, { subtree: true, childList: true });
const playerObserver = new MutationObserver(function (mutations) {
mutations.forEach((mutation) => {
if (mutation.target.classList.contains(playerState.active)) {
updateBatteryInfo(batteryInfo);
updateTime(time);
} else {
hideBatteryInfo();
hideTime();
}
});
});
const videoPlayerViewObserver = new MutationObserver(function (mutations_list) {
mutations_list.forEach(function (mutation) {
mutation.addedNodes.forEach(function (added_node) {
if (added_node.dataset.uia === "watch-video-player-view-minimized") {
videoPlayerViewObserver.disconnect();
const player = added_node.firstChild;
playerObserver.observe(player, { attributes: true });
}
});
});
});
function observeVideoPlayerView() {
const videoPlayerView = document.querySelector("[data-uia='watch-video']");
videoPlayerView &&
videoPlayerViewObserver.observe(videoPlayerView, {
subtree: false,
childList: true,
});
}
window.onload = observeVideoPlayerView;
["", "webkit", "moz", "ms"].forEach((prefix) =>
document.addEventListener(prefix + "fullscreenchange", checkFullScreen, false)
);
function checkFullScreen(event) {
player = document.fullscreenElement;
if (player) {
addBatteryInfo(player);
addTime(player);
} else {
removeBatteryInfo();
removeTime();
}
}
function addTime(player) {
time = document.createElement("p");
time.style.margin = 0;
time.style.padding = 0;
time.style.position = "fixed";
time.style.top = 0;
time.style.left = 0;
time.style.fontSize = "16px";
time.style.color = "white";
player.appendChild(time);
updateTime(time);
}
function removeTime() {
time && time.remove();
}
function addBatteryInfo(player) {
batteryInfo = document.createElement("p");
batteryInfo.style.margin = 0;
batteryInfo.style.padding = 0;
batteryInfo.style.position = "fixed";
batteryInfo.style.top = 0;
batteryInfo.style.right = 0;
batteryInfo.style.fontSize = "16px";
batteryInfo.style.color = "white";
player.appendChild(batteryInfo);
updateBatteryInfo(batteryInfo);
}
function removeBatteryInfo() {
batteryInfo && batteryInfo.remove();
}
function showBatteryInfo() {
if (batteryInfo) {
batteryInfo.style.opacity = 1;
}
}
function hideBatteryInfo() {
if (batteryInfo) {
batteryInfo.style.opacity = 0;
}
}
function showTime() {
if (time) {
time.style.opacity = 1;
}
}
function hideTime() {
if (time) {
time.style.opacity = 0;
}
}
function updateBatteryInfo(batteryInfo) {
if (batteryInfo) {
navigator.getBattery().then((battery) => {
batteryInfo.textContent = (battery.level * 100).toFixed() + "%";
batteryInfo.textContent += battery.charging ? "⚡️" : "";
batteryInfo.style.color =
(battery.level * 100).toFixed() < 50 ? "red" : "white";
showBatteryInfo();
});
}
}
function updateTime(time) {
if (time) {
time.textContent = formatAMPM(new Date());
showTime();
}
}
function formatAMPM(date) {
var hours = date.getHours();
var minutes = date.getMinutes();
var ampm = hours >= 12 ? "pm" : "am";
hours = hours % 12;
hours = hours ? hours : 12; // the hour '0' should be '12'
minutes = minutes < 10 ? "0" + minutes : minutes;
var strTime = hours + ":" + minutes + " " + ampm;
return strTime.toUpperCase();
}