b38dea0597
Share Gaia assets and adapters, keep private profiles and development documents local, and update both public READMEs.
86 lines
2.2 KiB
JavaScript
86 lines
2.2 KiB
JavaScript
/**
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Copyright 2012, Mozilla Foundation
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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'use strict';
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(function(exports) {
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/**
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* Creates an object used for refreshing the clock UI element. Handles all
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* related timer manipulation (start/stop/cancel).
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* @class Clock
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*/
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function Clock() {
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/**
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* One-shot timer used to refresh the clock at a minute's turn
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* @memberOf Clock
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*/
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this.timeoutID = null;
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/**
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* Timer used to refresh the clock every minute
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* @memberOf Clock
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*/
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this.timerID = null;
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/**
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* Start the timer used to refresh the clock, will call the specified
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* callback at every timer tick to refresh the UI. The callback used to
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* refresh the UI will also be called immediately to ensure the UI is
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* consistent.
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*
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* @param {Function} refresh Function used to refresh the UI at every timer
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* tick, should accept a date object as its only argument.
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* @memberOf Clock
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*/
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this.start = function cl_start(refresh) {
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var date = new Date();
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var self = this;
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refresh(date);
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if (this.timeoutID == null) {
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this.timeoutID = window.setTimeout(function cl_setClockInterval() {
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if (self.timerID == null) {
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self.timerID = window.setInterval(function cl_clockInterval() {
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refresh(new Date());
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}, 60000);
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}
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}, (60 - date.getSeconds()) * 1000);
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}
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};
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/**
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* Stops the timer used to refresh the clock
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* @memberOf Clock
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*/
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this.stop = function cl_stop() {
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if (this.timeoutID != null) {
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window.clearTimeout(this.timeoutID);
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this.timeoutID = null;
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}
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if (this.timerID != null) {
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window.clearInterval(this.timerID);
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this.timerID = null;
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}
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};
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}
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/** @exports Clock */
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exports.Clock = Clock;
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})(window);
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