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'use strict';
function $IntervalProvider() {
this.$get = ['$rootScope', '$window', '$q',
function($rootScope, $window, $q) {
var intervals = {};
/**
* @ngdoc function
* @name ng.$interval
*
* @description
* Angular's wrapper for `window.setInterval`. The `fn` function is executed every `delay`
* milliseconds.
*
* The return value of registering an interval function is a promise. This promise will be
* notified upon each tick of the interval, and will be resolved after `count` iterations, or
* run indefinitely if `count` is not defined. The value of the notification will be the
* number of iterations that have run.
* To cancel an interval, call `$interval.cancel(promise)`.
*
* In tests you can use {@link ngMock.$interval#methods_flush `$interval.flush(millis)`} to
* move forward by `millis` milliseconds and trigger any functions scheduled to run in that
* time.
*
* @param {function()} fn A function that should be called repeatedly.
* @param {number} delay Number of milliseconds between each function call.
* @param {number=} [count=0] Number of times to repeat. If not set, or 0, will repeat
* indefinitely.
* @param {boolean=} [invokeApply=true] If set to `false` skips model dirty checking, otherwise
* will invoke `fn` within the {@link ng.$rootScope.Scope#methods_$apply $apply} block.
* @returns {promise} A promise which will be notified on each iteration.
*/
function interval(fn, delay, count, invokeApply) {
var setInterval = $window.setInterval,
clearInterval = $window.clearInterval,
deferred = $q.defer(),
promise = deferred.promise,
iteration = 0,
skipApply = (isDefined(invokeApply) && !invokeApply);
count = isDefined(count) ? count : 0,
promise.then(null, null, fn);
promise.$$intervalId = setInterval(function tick() {
deferred.notify(iteration++);
if (count > 0 && iteration >= count) {
deferred.resolve(iteration);
clearInterval(promise.$$intervalId);
delete intervals[promise.$$intervalId];
}
if (!skipApply) $rootScope.$apply();
}, delay);
intervals[promise.$$intervalId] = deferred;
return promise;
}
/**
* @ngdoc function
* @name ng.$interval#cancel
* @methodOf ng.$interval
*
* @description
* Cancels a task associated with the `promise`.
*
* @param {number} promise Promise returned by the `$interval` function.
* @returns {boolean} Returns `true` if the task was successfully canceled.
*/
interval.cancel = function(promise) {
if (promise && promise.$$intervalId in intervals) {
intervals[promise.$$intervalId].reject('canceled');
clearInterval(promise.$$intervalId);
delete intervals[promise.$$intervalId];
return true;
}
return false;
};
return interval;
}];
}
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