/* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ "use strict"; /** * JS module implementation of setTimeout and clearTimeout. */ var EXPORTED_SYMBOLS = [ "setTimeout", "setTimeoutWithTarget", "clearTimeout", "setInterval", "setIntervalWithTarget", "clearInterval", "requestIdleCallback", "cancelIdleCallback", ]; // This gives us >=2^30 unique timer IDs, enough for 1 per ms for 12.4 days. var gNextId = 1; // setTimeout and setInterval must return a positive integer var gTimerTable = new Map(); // int -> nsITimer or idleCallback // Don't generate this for every timer. var setTimeout_timerCallbackQI = ChromeUtils.generateQI([ Ci.nsITimerCallback, Ci.nsINamed, ]); function _setTimeoutOrIsInterval( aCallback, aMilliseconds, aIsInterval, aTarget, aArgs ) { if (typeof aCallback !== "function") { throw new Error( `callback is not a function in ${ aIsInterval ? "setInterval" : "setTimeout" }` ); } let id = gNextId++; let timer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer); if (aTarget) { timer.target = aTarget; } let callback = { QueryInterface: setTimeout_timerCallbackQI, // nsITimerCallback notify() { if (!aIsInterval) { gTimerTable.delete(id); } aCallback.apply(null, aArgs); }, // nsINamed name: (aIsInterval ? "setInterval() for " : "setTimeout() for ") + Cu.generateXPCWrappedJS(aCallback).QueryInterface(Ci.nsINamed).name, }; timer.initWithCallback( callback, aMilliseconds, aIsInterval ? timer.TYPE_REPEATING_SLACK : timer.TYPE_ONE_SHOT ); gTimerTable.set(id, timer); return id; } function setTimeout(aCallback, aMilliseconds, ...aArgs) { return _setTimeoutOrIsInterval(aCallback, aMilliseconds, false, null, aArgs); } function setTimeoutWithTarget(aCallback, aMilliseconds, aTarget, ...aArgs) { return _setTimeoutOrIsInterval( aCallback, aMilliseconds, false, aTarget, aArgs ); } function setInterval(aCallback, aMilliseconds, ...aArgs) { return _setTimeoutOrIsInterval(aCallback, aMilliseconds, true, null, aArgs); } function setIntervalWithTarget(aCallback, aMilliseconds, aTarget, ...aArgs) { return _setTimeoutOrIsInterval( aCallback, aMilliseconds, true, aTarget, aArgs ); } var clearInterval = (this.clearTimeout = function clearTimeout(aId) { if (gTimerTable.has(aId)) { gTimerTable.get(aId).cancel(); gTimerTable.delete(aId); } }); function requestIdleCallback(aCallback, aOptions) { if (typeof aCallback !== "function") { throw new Error("callback is not a function in requestIdleCallback"); } let id = gNextId++; let callback = (...aArgs) => { if (gTimerTable.has(id)) { gTimerTable.delete(id); aCallback(...aArgs); } }; ChromeUtils.idleDispatch(callback, aOptions); gTimerTable.set(id, callback); return id; } function cancelIdleCallback(aId) { if (gTimerTable.has(aId)) { gTimerTable.delete(aId); } }