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Edit File: pace.js

/*!
 * pace.js v1.2.4
 * https://github.com/CodeByZach/pace/
 * Licensed MIT © HubSpot, Inc.
 */

defaultOptions = {
        className: '',
        catchupTime: 100,
        initialRate: .03,
        minTime: 250,
        ghostTime: 100,
        maxProgressPerFrame: 20,
        easeFactor: 1.25,
        startOnPageLoad: true,
        restartOnPushState: false,
        restartOnRequestAfter: false,
        target: 'body',
        elements: false,
        eventLag: false,
        ajax: false
    };

now = function() {
        var _ref;
        return (_ref = typeof performance !== "undefined" && performance !== null ? typeof performance.now === "function" ? performance.now() : void 0 : void 0) != null ? _ref : +(new Date);
    };

requestAnimationFrame = window.requestAnimationFrame || window.mozRequestAnimationFrame || window.webkitRequestAnimationFrame || window.msRequestAnimationFrame;

cancelAnimationFrame = window.cancelAnimationFrame || window.mozCancelAnimationFrame;

addEventListener = function(obj, event, callback) {
        if (typeof obj.addEventListener === "function") {
            return obj.addEventListener(event, callback, false);
        } else {
            return function() {
                if (typeof obj["on" + event] !== "function" || typeof obj["on" + event].eventListeners !== "object") {
                    var eventListeners = new Events();
                    if (typeof obj["on" + event] === "function") {
                        eventListeners.on(event, obj["on" + event]);
                    }
                    obj["on" + event] = function(evt) {
                        return eventListeners.trigger(event, evt);
                    };
                    obj["on" + event].eventListeners = eventListeners;
                } else {
                    var eventListeners = obj["on" + event].eventListeners;
                }
                eventListeners.on(event, callback);
            }();
        }
    };

if (requestAnimationFrame == null) {
        requestAnimationFrame = function(fn) {
            return setTimeout(fn, 50);
        };
        cancelAnimationFrame = function(id) {
            return clearTimeout(id);
        };
    }

runAnimation = function(fn) {
        var last, tick;
        last = now();
        tick = function() {
            var diff;
            diff = now() - last;
            if (diff >= 33) {
                last = now();
                return fn(diff, function() {
                    return requestAnimationFrame(tick);
                });
            } else {
                return setTimeout(tick, 33 - diff);
            }
        };
        return tick();
    };

result = function() {
        var args, key, obj;
        obj = arguments[0], key = arguments[1], args = 3 <= arguments.length ? __slice.call(arguments, 2) : [];
        if (typeof obj[key] === 'function') {
            return obj[key].apply(obj, args);
        } else {
            return obj[key];
        }
    };

extend = function() {
        var key, out, source, sources, val, _i, _len;
        out = arguments[0], sources = 2 <= arguments.length ? __slice.call(arguments, 1) : [];
        for (_i = 0, _len = sources.length; _i < _len; _i++) {
            source = sources[_i];
            if (source) {
                for (key in source) {
                    if (!__hasProp.call(source, key)) continue;
                    val = source[key];
                    if ((out[key] != null) && typeof out[key] === 'object' && (val != null) && typeof val === 'object') {
                        extend(out[key], val);
                    } else {
                        out[key] = val;
                    }
                }
            }
        }
        return out;
    };

avgAmplitude = function(arr) {
        var count, sum, v, _i, _len;
        sum = count = 0;
        for (_i = 0, _len = arr.length; _i < _len; _i++) {
            v = arr[_i];
            sum += Math.abs(v);
            count++;
        }
        return sum / count;
    };

getFromDOM = function(key, json) {
        var data, e, el;
        if (key == null) {
            key = 'options';
        }
        if (json == null) {
            json = true;
        }
        el = document.querySelector("[data-pace-" + key + "]");
        if (!el) {
            return;
        }
        data = el.getAttribute("data-pace-" + key);
        if (!json) {
            return data;
        }
        try {
            return JSON.parse(data);
        } catch (_error) {
            e = _error;
            return typeof console !== "undefined" && console !== null ? console.error("Error parsing inline pace options", e) : void 0;
        }
    };

Evented = (function() {
        function Evented() {}

Evented.prototype.on = function(event, handler, ctx, once) {
            var _base;
            if (once == null) {
                once = false;
            }
            if (this.bindings == null) {
                this.bindings = {};
            }
            if ((_base = this.bindings)[event] == null) {
                _base[event] = [];
            }
            return this.bindings[event].push({
                handler: handler,
                ctx: ctx,
                once: once
            });
        };

Evented.prototype.once = function(event, handler, ctx) {
            return this.on(event, handler, ctx, true);
        };

Evented.prototype.off = function(event, handler) {
            var i, _ref, _results;
            if (((_ref = this.bindings) != null ? _ref[event] : void 0) == null) {
                return;
            }
            if (handler == null) {
                return delete this.bindings[event];
            } else {
                i = 0;
                _results = [];
                while (i < this.bindings[event].length) {
                    if (this.bindings[event][i].handler === handler) {
                        _results.push(this.bindings[event].splice(i, 1));
                    } else {
                        _results.push(i++);
                    }
                }
                return _results;
            }
        };

Evented.prototype.trigger = function() {
            var args, ctx, event, handler, i, once, _ref, _ref1, _results;
            event = arguments[0], args = 2 <= arguments.length ? __slice.call(arguments, 1) : [];
            if ((_ref = this.bindings) != null ? _ref[event] : void 0) {
                i = 0;
                _results = [];
                while (i < this.bindings[event].length) {
                    _ref1 = this.bindings[event][i], handler = _ref1.handler, ctx = _ref1.ctx, once = _ref1.once;
                    handler.apply(ctx != null ? ctx : this, args);
                    if (once) {
                        _results.push(this.bindings[event].splice(i, 1));
                    } else {
                        _results.push(i++);
                    }
                }
                return _results;
            }
        };

return Evented;

})();

Pace = window.Pace || {};

window.Pace = Pace;

extend(Pace, Evented.prototype);

options = Pace.options = extend({}, defaultOptions, window.paceOptions, getFromDOM());

_ref = ['ajax', 'document', 'eventLag', 'elements'];
    for (_i = 0, _len = _ref.length; _i < _len; _i++) {
        source = _ref[_i];
        if (options[source] === true) {
            options[source] = defaultOptions[source];
        }
    }

NoTargetError = (function(_super) {
        __extends(NoTargetError, _super);

function NoTargetError() {
            _ref1 = NoTargetError.__super__.constructor.apply(this, arguments);
            return _ref1;
        }

return NoTargetError;

})(Error);

Bar = (function() {
        function Bar() {
            this.progress = 0;
        }

Bar.prototype.getElement = function() {
            var targetElement;
            if (this.el == null) {
                targetElement = document.querySelector(options.target);
                if (!targetElement) {
                    throw new NoTargetError;
                }
                this.el = document.createElement('div');
                this.el.className = "pace pace-active";
                document.body.className = document.body.className.replace(/(pace-done )|/, 'pace-running ');
                var _custom_class_name = (options.className !== '') ? ' '+options.className : '';
                this.el.innerHTML = '<div class="pace-progress'+_custom_class_name+'">\n  <div class="pace-progress-inner"></div>\n</div>\n<div class="pace-activity"></div>';
                if (targetElement.firstChild != null) {
                    targetElement.insertBefore(this.el, targetElement.firstChild);
                } else {
                    targetElement.appendChild(this.el);
                }
            }
            return this.el;
        };

Bar.prototype.finish = function() {
            var el;
            el = this.getElement();
            el.className = el.className.replace('pace-active', 'pace-inactive');
            return document.body.className = document.body.className.replace('pace-running ', 'pace-done ');
        };

Bar.prototype.update = function(prog) {
            this.progress = prog;
            Pace.trigger('progress', prog);
            return this.render();
        };

Bar.prototype.destroy = function() {
            try {
                this.getElement().parentNode.removeChild(this.getElement());
            } catch (_error) {
                NoTargetError = _error;
            }
            return this.el = void 0;
        };

Bar.prototype.render = function() {
            var el, key, progressStr, transform, _j, _len1, _ref2;
            if (document.querySelector(options.target) == null) {
                return false;
            }
            el = this.getElement();
            transform = "translate3d(" + this.progress + "%, 0, 0)";
            _ref2 = ['webkitTransform', 'msTransform', 'transform'];
            for (_j = 0, _len1 = _ref2.length; _j < _len1; _j++) {
                key = _ref2[_j];
                el.children[0].style[key] = transform;
            }
            if (!this.lastRenderedProgress || this.lastRenderedProgress | 0 !== this.progress | 0) {
                document.body.style.setProperty('--theme-loading-progress', "" + (this.progress | 0) + "%");

Bar.prototype.done = function() {
            return this.progress >= 100;
        };

return Bar;

})();

Events = (function() {
        function Events() {
            this.bindings = {};
        }

Events.prototype.trigger = function(name, val) {
            var binding, _j, _len1, _ref2, _results;
            if (this.bindings[name] != null) {
                _ref2 = this.bindings[name];
                _results = [];
                for (_j = 0, _len1 = _ref2.length; _j < _len1; _j++) {
                    binding = _ref2[_j];
                    _results.push(binding.call(this, val));
                }
                return _results;
            }
        };

Events.prototype.on = function(name, fn) {
            var _base;
            if ((_base = this.bindings)[name] == null) {
                _base[name] = [];
            }
            return this.bindings[name].push(fn);
        };

return Events;

})();

_XMLHttpRequest = window.XMLHttpRequest;

_XDomainRequest = window.XDomainRequest;

_WebSocket = window.WebSocket;

extendNative = function(to, from) {
        var e, key, _results;
        _results = [];
        for (key in from.prototype) {
            try {
                if ((to[key] == null) && typeof from[key] !== 'function') {
                    if (typeof Object.defineProperty === 'function') {
                        _results.push(Object.defineProperty(to, key, {
                            get: (function(key) {
                                return function() {
                                    return from.prototype[key];
                                };
                            })(key),
                            configurable: true,
                            enumerable: true
                        }));
                    } else {
                        _results.push(to[key] = from.prototype[key]);
                    }
                } else {
                    _results.push(void 0);
                }
            } catch (_error) {
                e = _error;
            }
        }
        return _results;
    };

ignoreStack = [];

Pace.ignore = function() {
        var args, fn, ret;
        fn = arguments[0], args = 2 <= arguments.length ? __slice.call(arguments, 1) : [];
        ignoreStack.unshift('ignore');
        ret = fn.apply(null, args);
        ignoreStack.shift();
        return ret;
    };

Pace.track = function() {
        var args, fn, ret;
        fn = arguments[0], args = 2 <= arguments.length ? __slice.call(arguments, 1) : [];
        ignoreStack.unshift('track');
        ret = fn.apply(null, args);
        ignoreStack.shift();
        return ret;
    };

shouldTrack = function(method) {
        var _ref2;
        if (method == null) {
            method = 'GET';
        }
        if (ignoreStack[0] === 'track') {
            return 'force';
        }
        if (!ignoreStack.length && options.ajax) {
            if (method === 'socket' && options.ajax.trackWebSockets) {
                return true;
            } else if (_ref2 = method.toUpperCase(), __indexOf.call(options.ajax.trackMethods, _ref2) >= 0) {
                return true;
            }
        }
        return false;
    };

RequestIntercept = (function(_super) {
        __extends(RequestIntercept, _super);

return RequestIntercept;

})(Events);

_intercept = null;

getIntercept = function() {
        if (_intercept == null) {
            _intercept = new RequestIntercept;
        }
        return _intercept;
    };

shouldIgnoreURL = function(url) {
        var pattern, _j, _len1, _ref2;
        _ref2 = options.ajax.ignoreURLs;
        for (_j = 0, _len1 = _ref2.length; _j < _len1; _j++) {
            pattern = _ref2[_j];
            if (typeof pattern === 'string') {
                if (url.indexOf(pattern) !== -1) {
                    return true;
                }
            } else {
                if (pattern.test(url)) {
                    return true;
                }
            }
        }
        return false;
    };

getIntercept().on('request', function(_arg) {
        var after, args, request, type, url;
        type = _arg.type, request = _arg.request, url = _arg.url;
        if (shouldIgnoreURL(url)) {
            return;
        }
        if (!Pace.running && (options.restartOnRequestAfter !== false || shouldTrack(type) === 'force')) {
            args = arguments;
            after = options.restartOnRequestAfter || 0;
            if (typeof after === 'boolean') {
                after = 0;
            }
            return setTimeout(function() {
                var stillActive, _j, _len1, _ref2, _ref3, _results;
                if (type === 'socket') {
                    stillActive = request.readyState < 1;
                } else {
                    stillActive = (0 < (_ref2 = request.readyState) && _ref2 < 4);
                }
                if (stillActive) {
                    Pace.restart();
                    _ref3 = Pace.sources;
                    _results = [];
                    for (_j = 0, _len1 = _ref3.length; _j < _len1; _j++) {
                        source = _ref3[_j];
                        if (source instanceof AjaxMonitor) {
                            source.watch.apply(source, args);
                            break;
                        } else {
                            _results.push(void 0);
                        }
                    }
                    return _results;
                }
            }, after);
        }
    });

AjaxMonitor = (function() {
        function AjaxMonitor() {
            this.complete = __bind(this.complete, this);
            var _this = this;
            this.elements = [];
            getIntercept().on('request', function() {
                return _this.watch.apply(_this, arguments);
            });
        }

AjaxMonitor.prototype.watch = function(_arg) {
            var request, tracker, type, url;
            type = _arg.type, request = _arg.request, url = _arg.url;
            if (shouldIgnoreURL(url)) {
                return;
            }
            if (type === 'socket') {
                tracker = new SocketRequestTracker(request, this.complete);
            } else {
                tracker = new XHRRequestTracker(request, this.complete);
            }
            return this.elements.push(tracker);
        };

AjaxMonitor.prototype.complete = function(tracker) {
            return this.elements = this.elements.filter(function(e) {
                return e !== tracker;
            });
        };

return AjaxMonitor;

})();

XHRRequestTracker = (function() {
        function XHRRequestTracker(request, completeCallback) {
            var event, size, _j, _len1, _onreadystatechange, _ref2,
                _this = this;
            this.progress = 0;
            if (window.ProgressEvent != null) {
                size = null;
                addEventListener(request, 'progress', function(evt) {
                    if (evt.lengthComputable) {
                        return _this.progress = 100 * evt.loaded / evt.total;
                    } else {
                        return _this.progress = _this.progress + (100 - _this.progress) / 2;
                    }
                }, false);
                _ref2 = ['load', 'abort', 'timeout', 'error'];
                for (_j = 0, _len1 = _ref2.length; _j < _len1; _j++) {
                    event = _ref2[_j];
                    addEventListener(request, event, function() {
                        completeCallback(_this);
                        return _this.progress = 100;
                    }, false);
                }
            } else {
                _onreadystatechange = request.onreadystatechange;
                request.onreadystatechange = function() {
                    var _ref3;
                    if ((_ref3 = request.readyState) === 0 || _ref3 === 4) {
                        completeCallback(_this);
                        _this.progress = 100;
                    } else if (request.readyState === 3) {
                        _this.progress = 50;
                    }
                    return typeof _onreadystatechange === "function" ? _onreadystatechange.apply(null, arguments) : void 0;
                };
            }
        }

return XHRRequestTracker;

})();

SocketRequestTracker = (function() {
        function SocketRequestTracker(request, completeCallback) {
            var event, _j, _len1, _ref2,
                _this = this;
            this.progress = 0;
            _ref2 = ['error', 'open'];
            for (_j = 0, _len1 = _ref2.length; _j < _len1; _j++) {
                event = _ref2[_j];
                addEventListener(request, event, function() {
                    completeCallback(_this);
                    return _this.progress = 100;
                }, false);
            }
        }

return SocketRequestTracker;

})();

ElementMonitor = (function() {
        function ElementMonitor(options) {
            var selector, _j, _len1, _ref2;
            if (options == null) {
                options = {};
            }
            this.complete = __bind(this.complete, this);
            this.elements = [];
            if (options.selectors == null) {
                options.selectors = [];
            }
            _ref2 = options.selectors;
            for (_j = 0, _len1 = _ref2.length; _j < _len1; _j++) {
                selector = _ref2[_j];
                this.elements.push(new ElementTracker(selector, this.complete));
            }
        }

ElementMonitor.prototype.complete = function(tracker) {
            return this.elements = this.elements.filter(function(e) {
                return e !== tracker;
            });
        };

return ElementMonitor;

})();

ElementTracker = (function() {
        function ElementTracker(selector, completeCallback) {
            this.selector = selector;
            this.completeCallback = completeCallback;
            this.progress = 0;
            this.check();
        }

ElementTracker.prototype.check = function() {
            var _this = this;
            if (document.querySelector(this.selector)) {
                return this.done();
            } else {
                return setTimeout((function() {
                    return _this.check();
                }), options.elements.checkInterval);
            }
        };

ElementTracker.prototype.done = function() {
            this.completeCallback(this);
            this.completeCallback = null;
            return this.progress = 100;
        };

return ElementTracker;

})();

DocumentMonitor = (function() {
        DocumentMonitor.prototype.states = {
            loading: 0,
            interactive: 50,
            complete: 100
        };

return DocumentMonitor;

})();

EventLagMonitor = (function() {
        function EventLagMonitor() {
            var avg, interval, last, points, samples,
                _this = this;
            this.progress = 0;
            avg = 0;
            samples = [];
            points = 0;
            last = now();
            interval = setInterval(function() {
                var diff;
                diff = now() - last - 50;
                last = now();
                samples.push(diff);
                if (samples.length > options.eventLag.sampleCount) {
                    samples.shift();
                }
                avg = avgAmplitude(samples);
                if (++points >= options.eventLag.minSamples && avg < options.eventLag.lagThreshold) {
                    _this.progress = 100;
                    return clearInterval(interval);
                } else {
                    return _this.progress = 100 * (3 / (avg + 3));
                }
            }, 50);
        }

return EventLagMonitor;

})();

Scaler = (function() {
        function Scaler(source) {
            this.source = source;
            this.last = this.sinceLastUpdate = 0;
            this.rate = options.initialRate;
            this.catchup = 0;
            this.progress = this.lastProgress = 0;
            if (this.source != null) {
                this.progress = result(this.source, 'progress');
            }
        }

Scaler.prototype.tick = function(frameTime, val) {
            var scaling;
            if (val == null) {
                val = result(this.source, 'progress');
            }
            if (val >= 100) {
                this.done = true;
            }
            if (val === this.last) {
                this.sinceLastUpdate += frameTime;
            } else {
                if (this.sinceLastUpdate) {
                    this.rate = (val - this.last) / this.sinceLastUpdate;
                }
                this.catchup = (val - this.progress) / options.catchupTime;
                this.sinceLastUpdate = 0;
                this.last = val;
            }
            if (val > this.progress) {
                this.progress += this.catchup * frameTime;
            }
            scaling = 1 - Math.pow(this.progress / 100, options.easeFactor);
            this.progress += scaling * this.rate * frameTime;
            this.progress = Math.min(this.lastProgress + options.maxProgressPerFrame, this.progress);
            this.progress = Math.max(0, this.progress);
            this.progress = Math.min(100, this.progress);
            this.lastProgress = this.progress;
            return this.progress;
        };

return Scaler;

})();

sources = null;

scalers = null;

bar = null;

uniScaler = null;

animation = null;

cancelAnimation = null;

Pace.running = false;

handlePushState = function() {
        if (options.restartOnPushState) {
            return Pace.restart();
        }
    };

if (window.history.pushState != null) {
        _pushState = window.history.pushState;
        window.history.pushState = function() {
            handlePushState();
            return _pushState.apply(window.history, arguments);
        };
    }

if (window.history.replaceState != null) {
        _replaceState = window.history.replaceState;
        window.history.replaceState = function() {
            handlePushState();
            return _replaceState.apply(window.history, arguments);
        };
    }

SOURCE_KEYS = {
        ajax: AjaxMonitor,
        elements: ElementMonitor,
        document: DocumentMonitor,
        eventLag: EventLagMonitor
    };

(init = function() {
        var type, _j, _k, _len1, _len2, _ref2, _ref3, _ref4;
        Pace.sources = sources = [];
        _ref2 = ['ajax', 'elements', 'document', 'eventLag'];
        for (_j = 0, _len1 = _ref2.length; _j < _len1; _j++) {
            type = _ref2[_j];
            if (options[type] !== false) {
                sources.push(new SOURCE_KEYS[type](options[type]));
            }
        }
        _ref4 = (_ref3 = options.extraSources) != null ? _ref3 : [];
        for (_k = 0, _len2 = _ref4.length; _k < _len2; _k++) {
            source = _ref4[_k];
            sources.push(new source(options));
        }
        Pace.bar = bar = new Bar;
        scalers = [];
        return uniScaler = new Scaler;
    })();

Pace.stop = function() {
        Pace.trigger('stop');
        Pace.running = false;
        bar.destroy();
        cancelAnimation = true;
        if (animation != null) {
            if (typeof cancelAnimationFrame === "function") {
                cancelAnimationFrame(animation);
            }
            animation = null;
        }
        return init();
    };

Pace.restart = function() {
        Pace.trigger('restart');
        Pace.stop();
        return Pace.start();
    };

Pace.go = function() {
        var start;
        Pace.running = true;
        bar.render();
        start = now();
        cancelAnimation = false;
        return animation = runAnimation(function(frameTime, enqueueNextFrame) {
            var avg, count, done, element, elements, i, j, remaining, scaler, scalerList, sum, _j, _k, _len1, _len2, _ref2;
            remaining = 100 - bar.progress;
            count = sum = 0;
            done = true;
            for (i = _j = 0, _len1 = sources.length; _j < _len1; i = ++_j) {
                source = sources[i];
                scalerList = scalers[i] != null ? scalers[i] : scalers[i] = [];
                elements = (_ref2 = source.elements) != null ? _ref2 : [source];
                for (j = _k = 0, _len2 = elements.length; _k < _len2; j = ++_k) {
                    element = elements[j];
                    scaler = scalerList[j] != null ? scalerList[j] : scalerList[j] = new Scaler(element);
                    done &= scaler.done;
                    if (scaler.done) {
                        continue;
                    }
                    count++;
                    sum += scaler.tick(frameTime);
                }
            }
            avg = sum / count;
            bar.update(uniScaler.tick(frameTime, avg));
            if (bar.done() || done || cancelAnimation) {
                bar.update(100);
                Pace.trigger('done');
                return setTimeout(function() {
                    bar.finish();
                    Pace.running = false;
                    return Pace.trigger('hide');
                }, Math.max(options.ghostTime, Math.max(options.minTime - (now() - start), 0)));
            } else {
                return enqueueNextFrame();
            }
        });
    };

Pace.start = function(_options) {
        extend(options, _options);
        Pace.running = true;
        try {
            bar.render();
        } catch (_error) {
            NoTargetError = _error;
        }
        if (!document.querySelector('.pace')) {
            return setTimeout(Pace.start, 50);
        } else {
            Pace.trigger('start');
            return Pace.go();
        }
    };

if (typeof define === 'function' && define.amd) {
        define(function() {
            return Pace;
        });
    } else if (typeof exports === 'object') {
        module.exports = Pace;
    } else {
        if (options.startOnPageLoad) {
            Pace.start();
        }
    }

}).call(this);