☰

LegacyGM.js

A userscript library for adding support back to GM_ non async functions

Version vom 01.05.2025. Aktuellste Version

Dieses Skript sollte nicht direkt installiert werden. Es handelt sich hier um eine Bibliothek für andere Skripte, welche über folgenden Befehl in den Metadaten eines Skriptes eingebunden wird // @require https://update.greasyfork.ip-ddns.com/scripts/534637/1581328/LegacyGMjs.js 

/* LegacyGM.js
 - Version: 1.0.1
 - Author: Haka
 - Description: A userscript library for adding support back to GM_ non async functions
 - GitHub: https://github.com/Psyyke/A.C.A.S/
*/

async function LOAD_LEGACY_GM_SUPPORT() {
    const noLegacyInfo = typeof globalThis?.GM_info === 'undefined' && typeof GM?.info !== 'undefined',
          setValueExists = typeof GM?.setValue === 'function',
          getValueExists = typeof GM?.getValue === 'function',
          deleteValueExists = typeof GM?.deleteValue === 'function',
          listValuesExists = typeof GM?.listValues === 'function',
          openInTabExists = typeof GM?.openInTab === 'function';

    if(noLegacyInfo) globalThis.GM_info = GM.info;
    if(!listValuesExists && !getValueExists && !setValueExists) return;

    const gmCache = {};
    const gmFunctions = {
        GM_setValue: (key, value) => {
            GM.setValue(key, value);
            gmCache[key] = value;
        },
        GM_getValue: (key, defaultValue) => {
            return key in gmCache ? gmCache[key] : defaultValue;
        },
        GM_deleteValue: (key) => {
            GM.deleteValue(key);
            delete gmCache[key];
        },
        GM_listValues: () => {
            return Object.keys(gmCache);
        },
        GM_openInTab: (url, options = false) => {
            if(openInTabExists)
                return GM.openInTab(url, options);

            return window.open(url, '_blank');
        },
    };

    setInterval(async () => {
        const keys = await GM.listValues();

        // Load existing
        for(const key of keys) {
            gmCache[key] = await GM.getValue(key);
        }

        // Remove old
        for(const key in gmCache) {
            if(!keys.includes(key)) {
                delete gmCache[key];
            }
        }
    }, 1);


    // Define legacy functions
    for(const [name, func] of Object.entries(gmFunctions)) {
        if(typeof globalThis[name] === 'undefined') {
            Object.defineProperty(globalThis, name, {
                value: func,
                writable: false,
                configurable: false,
                enumerable: false,
            });
        }
    }
}