app/assets/javascripts/nprogress.js
/* NProgress, (c) 2013, 2014 Rico Sta. Cruz - http://ricostacruz.com/nprogress
* @license MIT */
;(function(root, factory) {
if (typeof define === 'function' && define.amd) {
define(factory);
} else if (typeof exports === 'object') {
module.exports = factory();
} else {
root.NProgress = factory();
}
})(this, function() {
var NProgress = {};
NProgress.version = '0.1.6';
var Settings = NProgress.settings = {
minimum: 0.08,
easing: 'ease',
positionUsing: '',
speed: 200,
trickle: true,
trickleRate: 0.02,
trickleSpeed: 800,
showSpinner: true,
barSelector: '[role="bar"]',
spinnerSelector: '[role="spinner"]',
parent: 'body',
template: '<div class="bar" role="bar"><div class="peg"></div></div><div class="spinner" role="spinner"><div class="spinner-icon"></div></div>'
};
/**
* Updates configuration.
*
* NProgress.configure({
* minimum: 0.1
* });
*/
NProgress.configure = function(options) {
var key, value;
for (key in options) {
value = options[key];
if (value !== undefined && options.hasOwnProperty(key)) Settings[key] = value;
}
return this;
};
/**
* Last number.
*/
NProgress.status = null;
/**
* Sets the progress bar status, where `n` is a number from `0.0` to `1.0`.
*
* NProgress.set(0.4);
* NProgress.set(1.0);
*/
NProgress.set = function(n) {
var started = NProgress.isStarted();
n = clamp(n, Settings.minimum, 1);
NProgress.status = (n === 1 ? null : n);
var progress = NProgress.render(!started),
bar = progress.querySelector(Settings.barSelector),
speed = Settings.speed,
ease = Settings.easing;
progress.offsetWidth; /* Repaint */
queue(function(next) {
// Set positionUsing if it hasn't already been set
if (Settings.positionUsing === '') Settings.positionUsing = NProgress.getPositioningCSS();
// Add transition
css(bar, barPositionCSS(n, speed, ease));
if (n === 1) {
// Fade out
css(progress, {
transition: 'none',
opacity: 1
});
progress.offsetWidth; /* Repaint */
setTimeout(function() {
css(progress, {
transition: 'all ' + speed + 'ms linear',
opacity: 0
});
setTimeout(function() {
NProgress.remove();
next();
}, speed);
}, speed);
} else {
setTimeout(next, speed);
}
});
return this;
};
NProgress.isStarted = function() {
return typeof NProgress.status === 'number';
};
/**
* Shows the progress bar.
* This is the same as setting the status to 0%, except that it doesn't go backwards.
*
* NProgress.start();
*
*/
NProgress.start = function() {
if (!NProgress.status) NProgress.set(0);
var work = function() {
setTimeout(function() {
if (!NProgress.status) return;
NProgress.trickle();
work();
}, Settings.trickleSpeed);
};
if (Settings.trickle) work();
return this;
};
/**
* Hides the progress bar.
* This is the *sort of* the same as setting the status to 100%, with the
* difference being `done()` makes some placebo effect of some realistic motion.
*
* NProgress.done();
*
* If `true` is passed, it will show the progress bar even if its hidden.
*
* NProgress.done(true);
*/
NProgress.done = function(force) {
if (!force && !NProgress.status) return this;
return NProgress.inc(0.3 + 0.5 * Math.random()).set(1);
};
/**
* Increments by a random amount.
*/
NProgress.inc = function(amount) {
var n = NProgress.status;
if (!n) {
return NProgress.start();
} else {
if (typeof amount !== 'number') {
amount = (1 - n) * clamp(Math.random() * n, 0.1, 0.95);
}
n = clamp(n + amount, 0, 0.994);
return NProgress.set(n);
}
};
NProgress.trickle = function() {
return NProgress.inc(Math.random() * Settings.trickleRate);
};
/**
* Waits for all supplied jQuery promises and
* increases the progress as the promises resolve.
*
* @param $promise jQUery Promise
*/
(function() {
var initial = 0, current = 0;
NProgress.promise = function($promise) {
if (!$promise || $promise.state() == "resolved") {
return this;
}
if (current == 0) {
NProgress.start();
}
initial++;
current++;
$promise.always(function() {
current--;
if (current == 0) {
initial = 0;
NProgress.done();
} else {
NProgress.set((initial - current) / initial);
}
});
return this;
};
})();
/**
* (Internal) renders the progress bar markup based on the `template`
* setting.
*/
NProgress.render = function(fromStart) {
if (NProgress.isRendered()) return document.getElementById('nprogress');
addClass(document.documentElement, 'nprogress-busy');
var progress = document.createElement('div');
progress.id = 'nprogress';
progress.innerHTML = Settings.template;
var bar = progress.querySelector(Settings.barSelector),
perc = fromStart ? '-100' : toBarPerc(NProgress.status || 0),
parent = document.querySelector(Settings.parent),
spinner;
css(bar, {
transition: 'all 0 linear',
transform: 'translate3d(' + perc + '%,0,0)'
});
if (!Settings.showSpinner) {
spinner = progress.querySelector(Settings.spinnerSelector);
spinner && removeElement(spinner);
}
if (parent != document.body) {
addClass(parent, 'nprogress-custom-parent');
}
parent.appendChild(progress);
return progress;
};
/**
* Removes the element. Opposite of render().
*/
NProgress.remove = function() {
removeClass(document.documentElement, 'nprogress-busy');
removeClass(document.querySelector(Settings.parent), 'nprogress-custom-parent')
var progress = document.getElementById('nprogress');
progress && removeElement(progress);
};
/**
* Checks if the progress bar is rendered.
*/
NProgress.isRendered = function() {
return !!document.getElementById('nprogress');
};
/**
* Determine which positioning CSS rule to use.
*/
NProgress.getPositioningCSS = function() {
// Sniff on document.body.style
var bodyStyle = document.body.style;
// Sniff prefixes
var vendorPrefix = ('WebkitTransform' in bodyStyle) ? 'Webkit' :
('MozTransform' in bodyStyle) ? 'Moz' :
('msTransform' in bodyStyle) ? 'ms' :
('OTransform' in bodyStyle) ? 'O' : '';
if (vendorPrefix + 'Perspective' in bodyStyle) {
// Modern browsers with 3D support, e.g. Webkit, IE10
return 'translate3d';
} else if (vendorPrefix + 'Transform' in bodyStyle) {
// Browsers without 3D support, e.g. IE9
return 'translate';
} else {
// Browsers without translate() support, e.g. IE7-8
return 'margin';
}
};
/**
* Helpers
*/
function clamp(n, min, max) {
if (n < min) return min;
if (n > max) return max;
return n;
}
/**
* (Internal) converts a percentage (`0..1`) to a bar translateX
* percentage (`-100%..0%`).
*/
function toBarPerc(n) {
return (-1 + n) * 100;
}
/**
* (Internal) returns the correct CSS for changing the bar's
* position given an n percentage, and speed and ease from Settings
*/
function barPositionCSS(n, speed, ease) {
var barCSS;
if (Settings.positionUsing === 'translate3d') {
barCSS = { transform: 'translate3d('+toBarPerc(n)+'%,0,0)' };
} else if (Settings.positionUsing === 'translate') {
barCSS = { transform: 'translate('+toBarPerc(n)+'%,0)' };
} else {
barCSS = { 'margin-left': toBarPerc(n)+'%' };
}
barCSS.transition = 'all '+speed+'ms '+ease;
return barCSS;
}
/**
* (Internal) Queues a function to be executed.
*/
var queue = (function() {
var pending = [];
function next() {
var fn = pending.shift();
if (fn) {
fn(next);
}
}
return function(fn) {
pending.push(fn);
if (pending.length == 1) next();
};
})();
/**
* (Internal) Applies css properties to an element, similar to the jQuery
* css method.
*
* While this helper does assist with vendor prefixed property names, it
* does not perform any manipulation of values prior to setting styles.
*/
var css = (function() {
var cssPrefixes = [ 'Webkit', 'O', 'Moz', 'ms' ],
cssProps = {};
function camelCase(string) {
return string.replace(/^-ms-/, 'ms-').replace(/-([\da-z])/gi, function(match, letter) {
return letter.toUpperCase();
});
}
function getVendorProp(name) {
var style = document.body.style;
if (name in style) return name;
var i = cssPrefixes.length,
capName = name.charAt(0).toUpperCase() + name.slice(1),
vendorName;
while (i--) {
vendorName = cssPrefixes[i] + capName;
if (vendorName in style) return vendorName;
}
return name;
}
function getStyleProp(name) {
name = camelCase(name);
return cssProps[name] || (cssProps[name] = getVendorProp(name));
}
function applyCss(element, prop, value) {
prop = getStyleProp(prop);
element.style[prop] = value;
}
return function(element, properties) {
var args = arguments,
prop,
value;
if (args.length == 2) {
for (prop in properties) {
value = properties[prop];
if (value !== undefined && properties.hasOwnProperty(prop)) applyCss(element, prop, value);
}
} else {
applyCss(element, args[1], args[2]);
}
}
})();
/**
* (Internal) Determines if an element or space separated list of class names contains a class name.
*/
function hasClass(element, name) {
var list = typeof element == 'string' ? element : classList(element);
return list.indexOf(' ' + name + ' ') >= 0;
}
/**
* (Internal) Adds a class to an element.
*/
function addClass(element, name) {
var oldList = classList(element),
newList = oldList + name;
if (hasClass(oldList, name)) return;
// Trim the opening space.
element.className = newList.substring(1);
}
/**
* (Internal) Removes a class from an element.
*/
function removeClass(element, name) {
var oldList = classList(element),
newList;
if (!hasClass(element, name)) return;
// Replace the class name.
newList = oldList.replace(' ' + name + ' ', ' ');
// Trim the opening and closing spaces.
element.className = newList.substring(1, newList.length - 1);
}
/**
* (Internal) Gets a space separated list of the class names on the element.
* The list is wrapped with a single space on each end to facilitate finding
* matches within the list.
*/
function classList(element) {
return (' ' + (element.className || '') + ' ').replace(/\s+/gi, ' ');
}
/**
* (Internal) Removes an element from the DOM.
*/
function removeElement(element) {
element && element.parentNode && element.parentNode.removeChild(element);
}
return NProgress;
});