// All common browsers limit the interval to 2^31 numbers.
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// For this reason, we need some workarounds if we want to use intervals larger than that.
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exports.maxInterval = Math.pow(2, 31) - 1;
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function clamp(interval) {
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return interval <= exports.maxInterval ? interval : exports.maxInterval;
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}
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function Timeout(cb, args, thisArg) {
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this.timestamp = null;
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this.timer = null;
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this.cb = cb;
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this.args = args;
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this.thisArg = thisArg;
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}
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Timeout.fired = function (timeout) {
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var now = Date.now();
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if (timeout.timestamp > now) {
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timeout.reschedule(timeout.timestamp - now);
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} else {
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timeout.fireNow();
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}
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};
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Timeout.prototype.reschedule = function (interval) {
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this.clear();
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this.timer = setTimeout(Timeout.fired, clamp(interval), this);
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};
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Timeout.prototype.fireNow = function () {
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this.clear();
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this.cb.apply(this.thisArg, this.args);
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};
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Timeout.prototype.fireAt = function (timestamp) {
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this.timestamp = timestamp;
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this.reschedule(timestamp - Date.now());
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};
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Timeout.prototype.fireIn = function (interval) {
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this.timestamp = Date.now() + interval;
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this.reschedule(interval);
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};
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Timeout.prototype.clear = function () {
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if (this.timer) {
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clearTimeout(this.timer);
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this.timer = null;
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}
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};
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function Interval(cb, args, thisArg) {
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var that = this;
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var callback = function () {
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that.timeout.fireIn(that.interval);
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cb.apply(that.timeout.thisArg, that.timeout.args);
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};
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this.timeout = new Timeout(callback, args, thisArg);
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this.interval = null;
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}
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Interval.prototype.fireEvery = function (interval) {
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this.interval = interval;
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this.timeout.fireIn(interval);
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};
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Interval.prototype.clear = function () {
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this.timeout.clear();
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};
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exports.Timeout = Timeout;
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exports.Interval = Interval;
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exports.setTimeoutAt = function (cb, timestamp) {
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var args = [];
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for (var i = 2; i < arguments.length; i += 1) {
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args.push(arguments[i]);
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}
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var timer = new Timeout(cb, args, this);
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timer.fireAt(timestamp);
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return timer;
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};
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exports.setTimeout = function (cb, interval) {
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var args = [];
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for (var i = 2; i < arguments.length; i += 1) {
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args.push(arguments[i]);
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}
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var timer = new Timeout(cb, args, this);
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timer.fireIn(interval);
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return timer;
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};
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exports.setInterval = function (cb, interval) {
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var args = [];
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for (var i = 2; i < arguments.length; i += 1) {
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args.push(arguments[i]);
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}
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var timer = new Interval(cb, args, this);
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timer.fireEvery(interval);
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return timer;
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};
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exports.clearTimeout = exports.clearInterval = function (timer) {
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if (timer && typeof timer.clear === 'function') {
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timer.clear();
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}
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};
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