GM_Polyfill

Provide GM_functions in non-ScriptManager-environment

Ce script ne doit pas être installé directement. C'est une librairie destinée à être incluse dans d'autres scripts avec la méta-directive // @require https://update.greasyfork.org/scripts/429613/975941/GM_Polyfill.js

Vous devrez installer une extension telle que Tampermonkey, Greasemonkey ou Violentmonkey pour installer ce script.

Vous devrez installer une extension telle que Tampermonkey ou Violentmonkey pour installer ce script.

Vous devrez installer une extension telle que Tampermonkey ou Violentmonkey pour installer ce script.

Vous devrez installer une extension telle que Tampermonkey ou Userscripts pour installer ce script.

Vous devrez installer une extension telle que Tampermonkey pour installer ce script.

Vous devrez installer une extension de gestionnaire de script utilisateur pour installer ce script.

(J'ai déjà un gestionnaire de scripts utilisateur, laissez-moi l'installer !)

Vous devrez installer une extension telle que Stylus pour installer ce style.

Vous devrez installer une extension telle que Stylus pour installer ce style.

Vous devrez installer une extension telle que Stylus pour installer ce style.

Vous devrez installer une extension du gestionnaire de style pour utilisateur pour installer ce style.

Vous devrez installer une extension du gestionnaire de style pour utilisateur pour installer ce style.

Vous devrez installer une extension du gestionnaire de style pour utilisateur pour installer ce style.

(J'ai déjà un gestionnaire de style utilisateur, laissez-moi l'installer!)

/* eslint-disable no-multi-spaces */
// ==UserScript==
// @name         GM_Polyfill
// @namespace    GM_Polyfill
// @version      0.3
// @description  Provide GM_functions in non-ScriptManager-environment
// @author       PY-DNG
// @match        *
// @icon         data:image/png;base64,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
// @grant        GM_setValue
// @grant        GM_getValue
// @grant        GM_deleteValue
// @grant        GM_listValues
// @grant        GM_xmlhttpRequest
// @grant        GM_openInTab
// @grant        GM_setClipboard
// ==/UserScript==

// GM_Polyfill By PY-DNG
// 2021.07.18 - 2021.07.19
// Simply provides the following GM_functions using localStorage, XMLHttpRequest and window.open:
// Returns object GM_POLYFILLED which has the following properties that shows you which GM_functions are actually polyfilled:
// GM_setValue, GM_getValue, GM_deleteValue, GM_listValues, GM_xmlhttpRequest, GM_openInTab, GM_setClipboard, unsafeWindow(object)
// All polyfilled GM_functions are accessable in window object/Global_Scope(only without Tempermonkey Sandboxing environment)
function GM_PolyFill(name = 'default') {
	const GM_POLYFILL_KEY_STORAGE = 'GM_STORAGE_POLYFILL';
	let GM_POLYFILL_storage;
	const GM_POLYFILLED = {
		GM_setValue: true,
		GM_getValue: true,
		GM_deleteValue: true,
		GM_listValues: true,
		GM_xmlhttpRequest: true,
		GM_openInTab: true,
		GM_setClipboard: true,
		unsafeWindow: true
	}
	
	// Ignore GM_PolyFill_Once
	window.GM_POLYFILLED && window.GM_POLYFILLED.once && (window.unsafeWindow = window.GM_setClipboard = window.GM_openInTab = window.GM_xmlhttpRequest = window.GM_getValue = window.GM_setValue = window.GM_listValues = window.GM_deleteValue = undefined);

	GM_setValue_polyfill();
	GM_getValue_polyfill();
	GM_deleteValue_polyfill();
	GM_listValues_polyfill();
	GM_xmlhttpRequest_polyfill();
	GM_openInTab_polyfill();
	GM_setClipboard_polyfill();
	unsafeWindow_polyfill();

	function GM_POLYFILL_getStorage() {
		let gstorage = localStorage.getItem(GM_POLYFILL_KEY_STORAGE);
		gstorage = gstorage ? JSON.parse(gstorage) : {};
		let storage = gstorage[name] ? gstorage[name] : {};
		return storage;
	}

	function GM_POLYFILL_saveStorage() {
		let gstorage = localStorage.getItem(GM_POLYFILL_KEY_STORAGE);
		gstorage = gstorage ? JSON.parse(gstorage) : {};
		gstorage[name] = GM_POLYFILL_storage;
		localStorage.setItem(GM_POLYFILL_KEY_STORAGE, JSON.stringify(gstorage));
	}

	// GM_setValue
	function GM_setValue_polyfill() {
		typeof (GM_setValue) === 'function' ? GM_POLYFILLED.GM_setValue = false: window.GM_setValue = PF_GM_setValue;;

		function PF_GM_setValue(name, value) {
			GM_POLYFILL_storage = GM_POLYFILL_getStorage();
			name = String(name);
			GM_POLYFILL_storage[name] = value;
			GM_POLYFILL_saveStorage();
		}
	}

	// GM_getValue
	function GM_getValue_polyfill() {
		typeof (GM_getValue) === 'function' ? GM_POLYFILLED.GM_getValue = false: window.GM_getValue = PF_GM_getValue;

		function PF_GM_getValue(name, defaultValue) {
			GM_POLYFILL_storage = GM_POLYFILL_getStorage();
			name = String(name);
			if (GM_POLYFILL_storage.hasOwnProperty(name)) {
				return GM_POLYFILL_storage[name];
			} else {
				return defaultValue;
			}
		}
	}

	// GM_deleteValue
	function GM_deleteValue_polyfill() {
		typeof (GM_deleteValue) === 'function' ? GM_POLYFILLED.GM_deleteValue = false: window.GM_deleteValue = PF_GM_deleteValue;

		function PF_GM_deleteValue(name) {
			GM_POLYFILL_storage = GM_POLYFILL_getStorage();
			name = String(name);
			if (GM_POLYFILL_storage.hasOwnProperty(name)) {
				delete GM_POLYFILL_storage[name];
				GM_POLYFILL_saveStorage();
			}
		}
	}

	// GM_listValues
	function GM_listValues_polyfill() {
		typeof (GM_listValues) === 'function' ? GM_POLYFILLED.GM_listValues = false: window.GM_listValues = PF_GM_listValues;

		function PF_GM_listValues() {
			GM_POLYFILL_storage = GM_POLYFILL_getStorage();
			return Object.keys(GM_POLYFILL_storage);
		}
	}

	// unsafeWindow
	function unsafeWindow_polyfill() {
		typeof (unsafeWindow) === 'object' ? GM_POLYFILLED.unsafeWindow = false: window.unsafeWindow = window;
	}

	// GM_xmlhttpRequest
	// not supported properties of details: synchronous binary nocache revalidate context fetch
	// not supported properties of response(onload arguments[0]): finalUrl
	// ---!IMPORTANT!--- DOES NOT SUPPORT CROSS-ORIGIN REQUESTS!!!!! ---!IMPORTANT!---
	function GM_xmlhttpRequest_polyfill() {
		typeof (GM_xmlhttpRequest) === 'function' ? GM_POLYFILLED.GM_xmlhttpRequest = false: window.GM_xmlhttpRequest = PF_GM_xmlhttpRequest;

		// details.synchronous is not supported as Tempermonkey
		function PF_GM_xmlhttpRequest(details) {
			const xhr = new XMLHttpRequest();

			// open request
			const openArgs = [details.method, details.url, true];
			if (details.user && details.password) {
				openArgs.push(details.user);
				openArgs.push(details.password);
			}
			xhr.open.apply(xhr, openArgs);

			// set headers
			if (details.headers) {
				for (const key of Object.keys(details.headers)) {
					xhr.setRequestHeader(key, details.headers[key]);
				}
			}
			details.cookie ? xhr.setRequestHeader('cookie', details.cookie) : function () {};
			details.anonymous ? xhr.setRequestHeader('cookie', '') : function () {};

			// properties
			xhr.timeout = details.timeout;
			xhr.responseType = details.responseType;
			details.overrideMimeType ? xhr.overrideMimeType(details.overrideMimeType) : function () {};

			// events
			xhr.onabort = details.onabort;
			xhr.onerror = details.onerror;
			xhr.onloadstart = details.onloadstart;
			xhr.onprogress = details.onprogress;
			xhr.onreadystatechange = details.onreadystatechange;
			xhr.ontimeout = details.ontimeout;
			xhr.onload = function (e) {
				const response = {
					readyState: xhr.readyState,
					status: xhr.status,
					statusText: xhr.statusText,
					responseHeaders: xhr.getAllResponseHeaders(),
					response: xhr.response
				};
				(details.responseType === '' || details.responseType === 'text') ? (response.responseText = xhr.responseText) : function () {};
				(details.responseType === '' || details.responseType === 'document') ? (response.responseXML = xhr.responseXML) : function () {};
				details.onload(response);
			}

			// send request
			details.data ? xhr.send(details.data) : xhr.send();

			return {
				abort: xhr.abort
			};
		}
	}

	// NOTE: options(arg2) is NOT SUPPORTED! if provided, then will just be skipped.
	function GM_openInTab_polyfill() {
		typeof (GM_openInTab) === 'function' ? GM_POLYFILLED.GM_openInTab = false: window.GM_openInTab = PF_GM_openInTab;

		function PF_GM_openInTab(url) {
			window.open(url);
		}
	}

	// NOTE: needs to be called in an event handler function, and info(arg2) is NOT SUPPORTED!
	function GM_setClipboard_polyfill() {
		typeof (GM_setClipboard) === 'function' ? GM_POLYFILLED.GM_setClipboard = false: window.GM_setClipboard = PF_GM_setClipboard;

		function PF_GM_setClipboard(text) {
			// Create a new textarea for copying
			const newInput = document.createElement('textarea');
			document.body.appendChild(newInput);
			newInput.value = text;
			newInput.select();
			document.execCommand('copy');
			document.body.removeChild(newInput);
		}
	}

	return GM_POLYFILLED;
}