assets/js/loading-bar.js
/*!
* angular-loading-bar v0.8.0
* https://chieffancypants.github.io/angular-loading-bar
* Copyright (c) 2015 Wes Cruver
* License: MIT
*/
/*
* angular-loading-bar
*
* intercepts XHR requests and creates a loading bar.
* Based on the excellent nprogress work by rstacruz (more info in readme)
*
* (c) 2013 Wes Cruver
* License: MIT
*/
(function() {
'use strict';
// Alias the loading bar for various backwards compatibilities since the project has matured:
angular.module('angular-loading-bar', ['cfp.loadingBarInterceptor']);
angular.module('chieffancypants.loadingBar', ['cfp.loadingBarInterceptor']);
/**
* loadingBarInterceptor service
*
* Registers itself as an Angular interceptor and listens for XHR requests.
*/
angular.module('cfp.loadingBarInterceptor', ['cfp.loadingBar'])
.config(['$httpProvider', function ($httpProvider) {
var interceptor = ['$q', '$cacheFactory', '$timeout', '$rootScope', '$log', 'cfpLoadingBar', function ($q, $cacheFactory, $timeout, $rootScope, $log, cfpLoadingBar) {
/**
* The total number of requests made
*/
var reqsTotal = 0;
/**
* The number of requests completed (either successfully or not)
*/
var reqsCompleted = 0;
/**
* The amount of time spent fetching before showing the loading bar
*/
var latencyThreshold = cfpLoadingBar.latencyThreshold;
/**
* $timeout handle for latencyThreshold
*/
var startTimeout;
/**
* calls cfpLoadingBar.complete() which removes the
* loading bar from the DOM.
*/
function setComplete() {
$timeout.cancel(startTimeout);
cfpLoadingBar.complete();
reqsCompleted = 0;
reqsTotal = 0;
}
/**
* Determine if the response has already been cached
* @param {Object} config the config option from the request
* @return {Boolean} retrns true if cached, otherwise false
*/
function isCached(config) {
var cache;
var defaultCache = $cacheFactory.get('$http');
var defaults = $httpProvider.defaults;
// Choose the proper cache source. Borrowed from angular: $http service
if ((config.cache || defaults.cache) && config.cache !== false &&
(config.method === 'GET' || config.method === 'JSONP')) {
cache = angular.isObject(config.cache) ? config.cache
: angular.isObject(defaults.cache) ? defaults.cache
: defaultCache;
}
var cached = cache !== undefined ?
cache.get(config.url) !== undefined : false;
if (config.cached !== undefined && cached !== config.cached) {
return config.cached;
}
config.cached = cached;
return cached;
}
return {
'request': function(config) {
// Check to make sure this request hasn't already been cached and that
// the requester didn't explicitly ask us to ignore this request:
if (!config.ignoreLoadingBar && !isCached(config)) {
$rootScope.$broadcast('cfpLoadingBar:loading', {url: config.url});
if (reqsTotal === 0) {
startTimeout = $timeout(function() {
cfpLoadingBar.start();
}, latencyThreshold);
}
reqsTotal++;
cfpLoadingBar.set(reqsCompleted / reqsTotal);
}
return config;
},
'response': function(response) {
if (!response || !response.config) {
$log.error('Broken interceptor detected: Config object not supplied in response:\n https://github.com/chieffancypants/angular-loading-bar/pull/50');
return response;
}
if (!response.config.ignoreLoadingBar && !isCached(response.config)) {
reqsCompleted++;
$rootScope.$broadcast('cfpLoadingBar:loaded', {url: response.config.url, result: response});
if (reqsCompleted >= reqsTotal) {
setComplete();
} else {
cfpLoadingBar.set(reqsCompleted / reqsTotal);
}
}
return response;
},
'responseError': function(rejection) {
if (!rejection || !rejection.config) {
$log.error('Broken interceptor detected: Config object not supplied in rejection:\n https://github.com/chieffancypants/angular-loading-bar/pull/50');
return $q.reject(rejection);
}
if (!rejection.config.ignoreLoadingBar && !isCached(rejection.config)) {
reqsCompleted++;
$rootScope.$broadcast('cfpLoadingBar:loaded', {url: rejection.config.url, result: rejection});
if (reqsCompleted >= reqsTotal) {
setComplete();
} else {
cfpLoadingBar.set(reqsCompleted / reqsTotal);
}
}
return $q.reject(rejection);
}
};
}];
$httpProvider.interceptors.push(interceptor);
}]);
/**
* Loading Bar
*
* This service handles adding and removing the actual element in the DOM.
* Generally, best practices for DOM manipulation is to take place in a
* directive, but because the element itself is injected in the DOM only upon
* XHR requests, and it's likely needed on every view, the best option is to
* use a service.
*/
angular.module('cfp.loadingBar', [])
.provider('cfpLoadingBar', function() {
this.autoIncrement = true;
this.includeSpinner = true;
this.includeBar = true;
this.latencyThreshold = 100;
this.startSize = 0.02;
this.parentSelector = '.section_heading';
this.spinnerTemplate = '<div id="loading-bar-spinner"><div class="spinner-icon"></div></div>';
this.loadingBarTemplate = '<div id="loading-bar"><div class="bar"><div class="peg"></div></div></div>';
this.$get = ['$injector', '$document', '$timeout', '$rootScope', function ($injector, $document, $timeout, $rootScope) {
var $animate;
var $parentSelector = this.parentSelector,
loadingBarContainer = angular.element(this.loadingBarTemplate),
loadingBar = loadingBarContainer.find('div').eq(0),
spinner = angular.element(this.spinnerTemplate);
var incTimeout,
completeTimeout,
started = false,
status = 0;
var autoIncrement = this.autoIncrement;
var includeSpinner = this.includeSpinner;
var includeBar = this.includeBar;
var startSize = this.startSize;
/**
* Inserts the loading bar element into the dom, and sets it to 2%
*/
function _start() {
if (!$animate) {
$animate = $injector.get('$animate');
}
var $parent = $document.find($parentSelector);
$timeout.cancel(completeTimeout);
// do not continually broadcast the started event:
if (started) {
return;
}
$rootScope.$broadcast('cfpLoadingBar:started');
started = true;
if (includeBar) {
$animate.enter(loadingBarContainer, $parent);
}
_set(startSize);
}
/**
* Set the loading bar's width to a certain percent.
*
* @param n any value between 0 and 1
*/
function _set(n) {
if (!started) {
return;
}
var pct = (n * 100) + '%';
loadingBar.css('width', pct);
status = n;
// increment loadingbar to give the illusion that there is always
// progress but make sure to cancel the previous timeouts so we don't
// have multiple incs running at the same time.
if (autoIncrement) {
$timeout.cancel(incTimeout);
incTimeout = $timeout(function() {
_inc();
}, 250);
}
}
/**
* Increments the loading bar by a random amount
* but slows down as it progresses
*/
function _inc() {
if (_status() >= 1) {
return;
}
var rnd = 0;
// TODO: do this mathmatically instead of through conditions
var stat = _status();
if (stat >= 0 && stat < 0.25) {
// Start out between 3 - 6% increments
rnd = (Math.random() * (5 - 3 + 1) + 3) / 100;
} else if (stat >= 0.25 && stat < 0.65) {
// increment between 0 - 3%
rnd = (Math.random() * 3) / 100;
} else if (stat >= 0.65 && stat < 0.9) {
// increment between 0 - 2%
rnd = (Math.random() * 2) / 100;
} else if (stat >= 0.9 && stat < 0.99) {
// finally, increment it .5 %
rnd = 0.005;
} else {
// after 99%, don't increment:
rnd = 0;
}
var pct = _status() + rnd;
_set(pct);
}
function _status() {
return status;
}
function _completeAnimation() {
status = 0;
started = false;
}
function _complete() {
if (!$animate) {
$animate = $injector.get('$animate');
}
$rootScope.$broadcast('cfpLoadingBar:completed');
_set(1);
$timeout.cancel(completeTimeout);
// Attempt to aggregate any start/complete calls within 500ms:
completeTimeout = $timeout(function() {
var promise = $animate.leave(loadingBarContainer, _completeAnimation);
if (promise && promise.then) {
promise.then(_completeAnimation);
}
$animate.leave(spinner);
}, 500);
}
return {
start : _start,
set : _set,
status : _status,
inc : _inc,
complete : _complete,
autoIncrement : this.autoIncrement,
includeSpinner : this.includeSpinner,
latencyThreshold : this.latencyThreshold,
parentSelector : this.parentSelector,
startSize : this.startSize
};
}]; //
}); // wtf javascript. srsly
})(); //