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/* NProgress, (c) 2013, 2014 Rico Sta. Cruz - http://ricostacruz.com/nprogress |
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* @license MIT */ |
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|
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;(function(root, factory) { |
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|
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if (typeof define === 'function' && define.amd) { |
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define(factory); |
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} else if (typeof exports === 'object') { |
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module.exports = factory(); |
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} else { |
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root.NProgress = factory(); |
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} |
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|
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})(this, function() { |
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var NProgress = {}; |
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|
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NProgress.version = '0.2.0'; |
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|
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var Settings = NProgress.settings = { |
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minimum: 0.08, |
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easing: 'linear', |
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positionUsing: '', |
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speed: 200, |
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trickle: true, |
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trickleSpeed: 200, |
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showSpinner: true, |
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barSelector: '[role="bar"]', |
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spinnerSelector: '[role="spinner"]', |
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parent: 'body', |
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template: '<div class="bar" role="bar"><div class="peg"></div></div><div class="spinner" role="spinner"><div class="spinner-icon"></div></div>' |
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}; |
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|
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/** |
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* Updates configuration. |
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* |
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* NProgress.configure({ |
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* minimum: 0.1 |
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* }); |
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*/ |
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NProgress.configure = function(options) { |
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var key, value; |
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for (key in options) { |
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value = options[key]; |
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if (value !== undefined && options.hasOwnProperty(key)) Settings[key] = value; |
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} |
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|
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return this; |
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}; |
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|
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/** |
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* Last number. |
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*/ |
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|
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NProgress.status = null; |
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|
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/** |
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* Sets the progress bar status, where `n` is a number from `0.0` to `1.0`. |
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* |
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* NProgress.set(0.4); |
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* NProgress.set(1.0); |
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*/ |
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|
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NProgress.set = function(n) { |
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var started = NProgress.isStarted(); |
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|
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n = clamp(n, Settings.minimum, 1); |
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NProgress.status = (n === 1 ? null : n); |
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|
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var progress = NProgress.render(!started), |
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bar = progress.querySelector(Settings.barSelector), |
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speed = Settings.speed, |
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ease = Settings.easing; |
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|
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progress.offsetWidth; /* Repaint */ |
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|
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queue(function(next) { |
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// Set positionUsing if it hasn't already been set |
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if (Settings.positionUsing === '') Settings.positionUsing = NProgress.getPositioningCSS(); |
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|
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// Add transition |
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css(bar, barPositionCSS(n, speed, ease)); |
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|
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if (n === 1) { |
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// Fade out |
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css(progress, { |
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transition: 'none', |
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opacity: 1 |
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}); |
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progress.offsetWidth; /* Repaint */ |
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|
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setTimeout(function() { |
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css(progress, { |
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transition: 'all ' + speed + 'ms linear', |
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opacity: 0 |
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}); |
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setTimeout(function() { |
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NProgress.remove(); |
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next(); |
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}, speed); |
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}, speed); |
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} else { |
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setTimeout(next, speed); |
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} |
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}); |
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|
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return this; |
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}; |
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|
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NProgress.isStarted = function() { |
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return typeof NProgress.status === 'number'; |
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}; |
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|
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/** |
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* Shows the progress bar. |
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* This is the same as setting the status to 0%, except that it doesn't go backwards. |
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* |
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* NProgress.start(); |
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* |
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*/ |
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NProgress.start = function() { |
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if (!NProgress.status) NProgress.set(0); |
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|
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var work = function() { |
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setTimeout(function() { |
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if (!NProgress.status) return; |
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NProgress.trickle(); |
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work(); |
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}, Settings.trickleSpeed); |
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}; |
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|
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if (Settings.trickle) work(); |
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|
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return this; |
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}; |
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|
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/** |
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* Hides the progress bar. |
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* This is the *sort of* the same as setting the status to 100%, with the |
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* difference being `done()` makes some placebo effect of some realistic motion. |
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* |
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* NProgress.done(); |
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* |
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* If `true` is passed, it will show the progress bar even if its hidden. |
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* |
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* NProgress.done(true); |
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*/ |
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|
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NProgress.done = function(force) { |
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if (!force && !NProgress.status) return this; |
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|
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return NProgress.inc(0.3 + 0.5 * Math.random()).set(1); |
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}; |
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|
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/** |
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* Increments by a random amount. |
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*/ |
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|
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NProgress.inc = function(amount) { |
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var n = NProgress.status; |
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|
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if (!n) { |
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return NProgress.start(); |
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} else if(n > 1) { |
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return; |
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} else { |
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if (typeof amount !== 'number') { |
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if (n >= 0 && n < 0.2) { amount = 0.1; } |
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else if (n >= 0.2 && n < 0.5) { amount = 0.04; } |
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else if (n >= 0.5 && n < 0.8) { amount = 0.02; } |
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else if (n >= 0.8 && n < 0.99) { amount = 0.005; } |
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else { amount = 0; } |
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} |
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|
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n = clamp(n + amount, 0, 0.994); |
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return NProgress.set(n); |
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} |
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}; |
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|
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NProgress.trickle = function() { |
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return NProgress.inc(); |
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}; |
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|
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/** |
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* Waits for all supplied jQuery promises and |
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* increases the progress as the promises resolve. |
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* |
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* @param $promise jQUery Promise |
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*/ |
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(function() { |
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var initial = 0, current = 0; |
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|
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NProgress.promise = function($promise) { |
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if (!$promise || $promise.state() === "resolved") { |
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return this; |
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} |
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|
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if (current === 0) { |
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NProgress.start(); |
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} |
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|
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initial++; |
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current++; |
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|
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$promise.always(function() { |
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current--; |
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if (current === 0) { |
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initial = 0; |
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NProgress.done(); |
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} else { |
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NProgress.set((initial - current) / initial); |
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} |
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}); |
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|
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return this; |
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}; |
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|
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})(); |
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|
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/** |
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* (Internal) renders the progress bar markup based on the `template` |
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* setting. |
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*/ |
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|
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NProgress.render = function(fromStart) { |
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if (NProgress.isRendered()) return document.getElementById('nprogress'); |
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|
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addClass(document.documentElement, 'nprogress-busy'); |
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|
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var progress = document.createElement('div'); |
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progress.id = 'nprogress'; |
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progress.innerHTML = Settings.template; |
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|
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var bar = progress.querySelector(Settings.barSelector), |
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perc = fromStart ? '-100' : toBarPerc(NProgress.status || 0), |
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parent = document.querySelector(Settings.parent), |
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spinner; |
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|
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css(bar, { |
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transition: 'all 0 linear', |
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transform: 'translate3d(' + perc + '%,0,0)' |
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}); |
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|
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if (!Settings.showSpinner) { |
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spinner = progress.querySelector(Settings.spinnerSelector); |
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spinner && removeElement(spinner); |
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} |
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|
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if (parent != document.body) { |
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addClass(parent, 'nprogress-custom-parent'); |
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} |
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|
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parent.appendChild(progress); |
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return progress; |
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}; |
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|
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/** |
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* Removes the element. Opposite of render(). |
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*/ |
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|
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NProgress.remove = function() { |
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removeClass(document.documentElement, 'nprogress-busy'); |
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removeClass(document.querySelector(Settings.parent), 'nprogress-custom-parent'); |
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var progress = document.getElementById('nprogress'); |
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progress && removeElement(progress); |
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}; |
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|
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/** |
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* Checks if the progress bar is rendered. |
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*/ |
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|
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NProgress.isRendered = function() { |
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return !!document.getElementById('nprogress'); |
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}; |
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|
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/** |
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* Determine which positioning CSS rule to use. |
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*/ |
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|
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NProgress.getPositioningCSS = function() { |
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// Sniff on document.body.style |
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var bodyStyle = document.body.style; |
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|
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// Sniff prefixes |
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var vendorPrefix = ('WebkitTransform' in bodyStyle) ? 'Webkit' : |
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('MozTransform' in bodyStyle) ? 'Moz' : |
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('msTransform' in bodyStyle) ? 'ms' : |
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('OTransform' in bodyStyle) ? 'O' : ''; |
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|
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if (vendorPrefix + 'Perspective' in bodyStyle) { |
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// Modern browsers with 3D support, e.g. Webkit, IE10 |
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return 'translate3d'; |
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} else if (vendorPrefix + 'Transform' in bodyStyle) { |
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// Browsers without 3D support, e.g. IE9 |
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return 'translate'; |
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} else { |
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// Browsers without translate() support, e.g. IE7-8 |
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return 'margin'; |
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} |
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}; |
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|
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/** |
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* Helpers |
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*/ |
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|
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function clamp(n, min, max) { |
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if (n < min) return min; |
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if (n > max) return max; |
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return n; |
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} |
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|
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/** |
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* (Internal) converts a percentage (`0..1`) to a bar translateX |
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* percentage (`-100%..0%`). |
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*/ |
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|
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function toBarPerc(n) { |
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return (-1 + n) * 100; |
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} |
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|
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|
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/** |
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* (Internal) returns the correct CSS for changing the bar's |
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* position given an n percentage, and speed and ease from Settings |
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*/ |
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|
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function barPositionCSS(n, speed, ease) { |
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var barCSS; |
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|
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if (Settings.positionUsing === 'translate3d') { |
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barCSS = { transform: 'translate3d('+toBarPerc(n)+'%,0,0)' }; |
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} else if (Settings.positionUsing === 'translate') { |
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barCSS = { transform: 'translate('+toBarPerc(n)+'%,0)' }; |
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} else { |
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barCSS = { 'margin-left': toBarPerc(n)+'%' }; |
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} |
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|
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barCSS.transition = 'all '+speed+'ms '+ease; |
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|
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return barCSS; |
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} |
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|
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/** |
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* (Internal) Queues a function to be executed. |
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*/ |
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|
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var queue = (function() { |
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var pending = []; |
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|
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function next() { |
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var fn = pending.shift(); |
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if (fn) { |
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fn(next); |
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} |
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} |
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|
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return function(fn) { |
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pending.push(fn); |
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if (pending.length == 1) next(); |
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}; |
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})(); |
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|
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/** |
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* (Internal) Applies css properties to an element, similar to the jQuery |
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* css method. |
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* |
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* While this helper does assist with vendor prefixed property names, it |
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* does not perform any manipulation of values prior to setting styles. |
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*/ |
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|
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var css = (function() { |
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var cssPrefixes = [ 'Webkit', 'O', 'Moz', 'ms' ], |
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cssProps = {}; |
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|
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function camelCase(string) { |
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return string.replace(/^-ms-/, 'ms-').replace(/-([\da-z])/gi, function(match, letter) { |
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return letter.toUpperCase(); |
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}); |
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} |
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|
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function getVendorProp(name) { |
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var style = document.body.style; |
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if (name in style) return name; |
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|
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var i = cssPrefixes.length, |
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capName = name.charAt(0).toUpperCase() + name.slice(1), |
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vendorName; |
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while (i--) { |
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vendorName = cssPrefixes[i] + capName; |
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if (vendorName in style) return vendorName; |
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} |
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|
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return name; |
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} |
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|
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function getStyleProp(name) { |
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name = camelCase(name); |
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return cssProps[name] || (cssProps[name] = getVendorProp(name)); |
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} |
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|
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function applyCss(element, prop, value) { |
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prop = getStyleProp(prop); |
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element.style[prop] = value; |
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} |
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|
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return function(element, properties) { |
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var args = arguments, |
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prop, |
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value; |
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|
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if (args.length == 2) { |
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for (prop in properties) { |
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value = properties[prop]; |
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if (value !== undefined && properties.hasOwnProperty(prop)) applyCss(element, prop, value); |
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} |
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} else { |
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applyCss(element, args[1], args[2]); |
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} |
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} |
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})(); |
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|
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/** |
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* (Internal) Determines if an element or space separated list of class names contains a class name. |
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*/ |
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|
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function hasClass(element, name) { |
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var list = typeof element == 'string' ? element : classList(element); |
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return list.indexOf(' ' + name + ' ') >= 0; |
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} |
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|
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/** |
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* (Internal) Adds a class to an element. |
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*/ |
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|
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function addClass(element, name) { |
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var oldList = classList(element), |
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newList = oldList + name; |
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|
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if (hasClass(oldList, name)) return; |
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|
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// Trim the opening space. |
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element.className = newList.substring(1); |
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} |
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|
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/** |
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* (Internal) Removes a class from an element. |
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*/ |
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|
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function removeClass(element, name) { |
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var oldList = classList(element), |
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newList; |
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|
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if (!hasClass(element, name)) return; |
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|
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// Replace the class name. |
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newList = oldList.replace(' ' + name + ' ', ' '); |
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|
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// Trim the opening and closing spaces. |
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element.className = newList.substring(1, newList.length - 1); |
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} |
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|
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/** |
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* (Internal) Gets a space separated list of the class names on the element. |
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* The list is wrapped with a single space on each end to facilitate finding |
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* matches within the list. |
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*/ |
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|
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function classList(element) { |
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return (' ' + (element && element.className || '') + ' ').replace(/\s+/gi, ' '); |
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} |
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|
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/** |
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* (Internal) Removes an element from the DOM. |
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*/ |
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|
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function removeElement(element) { |
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element && element.parentNode && element.parentNode.removeChild(element); |
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} |
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|
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return NProgress; |
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}); |
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|
