179 lines
3.7 KiB
JavaScript
179 lines
3.7 KiB
JavaScript
/**
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* @var attempts
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* @description Number of attempts
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* @type {number}
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*/
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let attempts = 1;
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/**
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* @constant dispatch
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* @description Shortcut to send messages to background script
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* @type {void}
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*/
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const dispatch = chrome.runtime.sendMessage;
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/**
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* @var intervalId
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* @description Task interval identifier
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* @type {number}
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*/
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let intervalId = 0;
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/**
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* @var loading
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* @description Is extension loading?
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* @type {boolean}
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*/
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let loading = true;
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/**
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* @var selectorsFromCache
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* @description Array of selectors
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* @type {string[]}
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*/
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let selectorsFromCache = [];
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/**
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* @var selectorsFromNetwork
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* @description Array of selectors
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* @type {string[]}
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*/
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let selectorsFromNetwork = [];
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/**
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* @function fix
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* @description Fix scroll issues
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*/
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const fix = () => {
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const html = document.documentElement;
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const body = document.body;
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const facebook = document.getElementsByClassName("_31e")[0];
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if (body) body.style.setProperty("overflow-y", "unset", "important");
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if (facebook) facebook.style.setProperty("position", "unset", "important");
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if (html) html.style.setProperty("overflow-y", "unset", "important");
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if (!loading) dispatch({ state: "ready", type: "UPDATE_STATE" });
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};
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/**
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* @function search
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* @description Retrieves HTML element if selector exists
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*
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* @param {string} selector
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* @returns {HTMLElement | null} An HTML element or null
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*/
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const search = (selector) => {
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if (!selector.includes("[") && !selector.includes(">")) {
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if (selector.startsWith(".")) {
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return document.getElementsByClassName(selector.slice(1))[0];
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}
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if (selector.startsWith("#")) {
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return document.getElementById(selector.slice(1));
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}
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} else {
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return document.querySelector(selector);
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}
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return null;
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};
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/**
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* @function removeFromCache
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* @description Removes matched elements from cache results
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*/
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const removeFromCache = () => {
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for (let i = selectorsFromCache.length; i--; ) {
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const selector = selectorsFromCache[i];
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const element = search(selector);
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if (element) {
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const tagName = element.tagName.toUpperCase();
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if (!["BODY", "HTML"].includes(tagName)) {
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element.remove();
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loading = false;
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}
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}
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}
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};
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/**
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* @function removeFromNetwork
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* @description Removes matched elements from network results
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*/
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const removeFromNetwork = () => {
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for (let i = selectorsFromNetwork.length; i--; ) {
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const selector = selectorsFromNetwork[i];
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const element = search(selector);
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if (element) {
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const tagName = element.tagName.toUpperCase();
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if (!["BODY", "HTML"].includes(tagName)) {
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element.remove();
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loading = false;
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dispatch({
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hostname: document.location.hostname,
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state: { matches: [selector] },
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type: "UPDATE_CACHE",
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});
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}
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}
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}
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};
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/**
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* @function runTasks
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* @description Starts running tasks
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*/
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const runTasks = () => {
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if (attempts >= 5 || selectorsFromCache.length === 0) {
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loading = false;
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}
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if (attempts <= 20) {
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fix();
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removeFromCache();
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if (attempts <= 5) removeFromNetwork();
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if (document.readyState === "complete") attempts += 1;
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}
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if (attempts > 20) {
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clearInterval(intervalId);
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}
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};
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/**
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* @description Setup extension context
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*/
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dispatch(
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{ hostname: document.location.hostname, type: "GET_CACHE" },
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null,
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({ enabled, matches }) => {
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dispatch({ type: "ENABLE_POPUP" });
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if (enabled) {
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dispatch({ state: "loading", type: "UPDATE_STATE" });
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selectorsFromCache = matches;
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dispatch({ type: "ENABLE_ICON" });
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dispatch({ type: "GET_LIST" }, null, ({ selectors }) => {
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selectorsFromNetwork = selectors;
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intervalId = setInterval(runTasks, 500);
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});
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}
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}
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);
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