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refactors Discourse.debouncePromise

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This commit is contained in:
Wojciech Zawistowski 2013-10-20 10:38:26 +02:00
parent aef4227073
commit 4c4a2f220e
2 changed files with 14 additions and 16 deletions
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23
app/assets/javascripts/discourse/components/debounce.js
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@ -47,25 +47,20 @@ Discourse.debounce = function(func, wait) {
@param {Number} wait how long to wait @param {Number} wait how long to wait
**/ **/
Discourse.debouncePromise = function(func, wait) { Discourse.debouncePromise = function(func, wait) {
var timeout = null; var self, args, promise;
var args = null; var later = function() {
var context = null; func.apply(self, args).then(function (funcResult) {
promise.resolve(funcResult);
});
};
return function() { return function() {
context = this; self = this;
var promise = Ember.Deferred.create();
args = arguments; args = arguments;
promise = Ember.Deferred.create();
if (!timeout) { Ember.run.debounce(null, later, wait);
timeout = Em.run.later(function () {
timeout = null;
func.apply(context, args).then(function (y) {
promise.resolve(y);
});
}, wait);
}
return promise; return promise;
}; };
}; };

7
test/javascripts/components/debounce_promise_test.js
View file

@ -49,14 +49,17 @@ test("executes only once, no matter how many times debounced function is called
originalAndCallbackFiredOnce("(second call was supressed)"); originalAndCallbackFiredOnce("(second call was supressed)");
}); });
test("does not prolong the timeout when the debounced function is called for the second time during the timeout", function() { test("prolongs the timeout when the debounced function is called for the second time during the timeout", function() {
debounced().then(callback); debounced().then(callback);
clock.tick(50); clock.tick(50);
debounced().then(callback); debounced().then(callback);
clock.tick(50); clock.tick(50);
originalAndCallbackFiredOnce("exactly at the end of the original timeout"); nothingFired("at the end of the original timeout");
clock.tick(50);
originalAndCallbackFiredOnce("exactly at the end of the prolonged timeout");
}); });
test("preserves last call's context and params when executing delayed function", function() { test("preserves last call's context and params when executing delayed function", function() {