progressbar.js

// ProgressBar.js 1.0.1
// https://kimmobrunfeldt.github.io/progressbar.js
// License: MIT

(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.ProgressBar = f()}})(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
/* shifty - v1.5.2 - 2016-02-10 - http://jeremyckahn.github.io/shifty */
;(function () {
  var root = this || Function('return this')();

/**
 * Shifty Core
 * By Jeremy Kahn - jeremyckahn@gmail.com
 */

var Tweenable = (function () {

  'use strict';

  // Aliases that get defined later in this function
  var formula;

  // CONSTANTS
  var DEFAULT_SCHEDULE_FUNCTION;
  var DEFAULT_EASING = 'linear';
  var DEFAULT_DURATION = 500;
  var UPDATE_TIME = 1000 / 60;

  var _now = Date.now
       ? Date.now
       : function () {return +new Date();};

  var now = typeof SHIFTY_DEBUG_NOW !== 'undefined' ? SHIFTY_DEBUG_NOW : _now;

  if (typeof window !== 'undefined') {
    // requestAnimationFrame() shim by Paul Irish (modified for Shifty)
    // http://paulirish.com/2011/requestanimationframe-for-smart-animating/
    DEFAULT_SCHEDULE_FUNCTION = window.requestAnimationFrame
       || window.webkitRequestAnimationFrame
       || window.oRequestAnimationFrame
       || window.msRequestAnimationFrame
       || (window.mozCancelRequestAnimationFrame
       && window.mozRequestAnimationFrame)
       || setTimeout;
  } else {
    DEFAULT_SCHEDULE_FUNCTION = setTimeout;
  }

  function noop () {
    // NOOP!
  }

  /**
   * Handy shortcut for doing a for-in loop. This is not a "normal" each
   * function, it is optimized for Shifty.  The iterator function only receives
   * the property name, not the value.
   * @param {Object} obj
   * @param {Function(string)} fn
   * @private
   */
  function each (obj, fn) {
    var key;
    for (key in obj) {
      if (Object.hasOwnProperty.call(obj, key)) {
        fn(key);
      }
    }
  }

  /**
   * Perform a shallow copy of Object properties.
   * @param {Object} targetObject The object to copy into
   * @param {Object} srcObject The object to copy from
   * @return {Object} A reference to the augmented `targetObj` Object
   * @private
   */
  function shallowCopy (targetObj, srcObj) {
    each(srcObj, function (prop) {
      targetObj[prop] = srcObj[prop];
    });

    return targetObj;
  }

  /**
   * Copies each property from src onto target, but only if the property to
   * copy to target is undefined.
   * @param {Object} target Missing properties in this Object are filled in
   * @param {Object} src
   * @private
   */
  function defaults (target, src) {
    each(src, function (prop) {
      if (typeof target[prop] === 'undefined') {
        target[prop] = src[prop];
      }
    });
  }

  /**
   * Calculates the interpolated tween values of an Object for a given
   * timestamp.
   * @param {Number} forPosition The position to compute the state for.
   * @param {Object} currentState Current state properties.
   * @param {Object} originalState: The original state properties the Object is
   * tweening from.
   * @param {Object} targetState: The destination state properties the Object
   * is tweening to.
   * @param {number} duration: The length of the tween in milliseconds.
   * @param {number} timestamp: The UNIX epoch time at which the tween began.
   * @param {Object} easing: This Object's keys must correspond to the keys in
   * targetState.
   * @private
   */
  function tweenProps (forPosition, currentState, originalState, targetState,
    duration, timestamp, easing) {
    var normalizedPosition =
        forPosition < timestamp ? 0 : (forPosition - timestamp) / duration;


    var prop;
    var easingObjectProp;
    var easingFn;
    for (prop in currentState) {
      if (currentState.hasOwnProperty(prop)) {
        easingObjectProp = easing[prop];
        easingFn = typeof easingObjectProp === 'function'
          ? easingObjectProp
          : formula[easingObjectProp];

        currentState[prop] = tweenProp(
          originalState[prop],
          targetState[prop],
          easingFn,
          normalizedPosition
        );
      }
    }

    return currentState;
  }

  /**
   * Tweens a single property.
   * @param {number} start The value that the tween started from.
   * @param {number} end The value that the tween should end at.
   * @param {Function} easingFunc The easing curve to apply to the tween.
   * @param {number} position The normalized position (between 0.0 and 1.0) to
   * calculate the midpoint of 'start' and 'end' against.
   * @return {number} The tweened value.
   * @private
   */
  function tweenProp (start, end, easingFunc, position) {
    return start + (end - start) * easingFunc(position);
  }

  /**
   * Applies a filter to Tweenable instance.
   * @param {Tweenable} tweenable The `Tweenable` instance to call the filter
   * upon.
   * @param {String} filterName The name of the filter to apply.
   * @private
   */
  function applyFilter (tweenable, filterName) {
    var filters = Tweenable.prototype.filter;
    var args = tweenable._filterArgs;

    each(filters, function (name) {
      if (typeof filters[name][filterName] !== 'undefined') {
        filters[name][filterName].apply(tweenable, args);
      }
    });
  }

  var timeoutHandler_endTime;
  var timeoutHandler_currentTime;
  var timeoutHandler_isEnded;
  var timeoutHandler_offset;
  /**
   * Handles the update logic for one step of a tween.
   * @param {Tweenable} tweenable
   * @param {number} timestamp
   * @param {number} delay
   * @param {number} duration
   * @param {Object} currentState
   * @param {Object} originalState
   * @param {Object} targetState
   * @param {Object} easing
   * @param {Function(Object, *, number)} step
   * @param {Function(Function,number)}} schedule
   * @param {number=} opt_currentTimeOverride Needed for accurate timestamp in
   * Tweenable#seek.
   * @private
   */
  function timeoutHandler (tweenable, timestamp, delay, duration, currentState,
    originalState, targetState, easing, step, schedule,
    opt_currentTimeOverride) {

    timeoutHandler_endTime = timestamp + delay + duration;

    timeoutHandler_currentTime =
    Math.min(opt_currentTimeOverride || now(), timeoutHandler_endTime);

    timeoutHandler_isEnded =
      timeoutHandler_currentTime >= timeoutHandler_endTime;

    timeoutHandler_offset = duration - (
      timeoutHandler_endTime - timeoutHandler_currentTime);

    if (tweenable.isPlaying()) {
      if (timeoutHandler_isEnded) {
        step(targetState, tweenable._attachment, timeoutHandler_offset);
        tweenable.stop(true);
      } else {
        tweenable._scheduleId =
          schedule(tweenable._timeoutHandler, UPDATE_TIME);

        applyFilter(tweenable, 'beforeTween');

        // If the animation has not yet reached the start point (e.g., there was
        // delay that has not yet completed), just interpolate the starting
        // position of the tween.
        if (timeoutHandler_currentTime < (timestamp + delay)) {
          tweenProps(1, currentState, originalState, targetState, 1, 1, easing);
        } else {
          tweenProps(timeoutHandler_currentTime, currentState, originalState,
            targetState, duration, timestamp + delay, easing);
        }

        applyFilter(tweenable, 'afterTween');

        step(currentState, tweenable._attachment, timeoutHandler_offset);
      }
    }
  }


  /**
   * Creates a usable easing Object from a string, a function or another easing
   * Object.  If `easing` is an Object, then this function clones it and fills
   * in the missing properties with `"linear"`.
   * @param {Object.<string|Function>} fromTweenParams
   * @param {Object|string|Function} easing
   * @return {Object.<string|Function>}
   * @private
   */
  function composeEasingObject (fromTweenParams, easing) {
    var composedEasing = {};
    var typeofEasing = typeof easing;

    if (typeofEasing === 'string' || typeofEasing === 'function') {
      each(fromTweenParams, function (prop) {
        composedEasing[prop] = easing;
      });
    } else {
      each(fromTweenParams, function (prop) {
        if (!composedEasing[prop]) {
          composedEasing[prop] = easing[prop] || DEFAULT_EASING;
        }
      });
    }

    return composedEasing;
  }

  /**
   * Tweenable constructor.
   * @class Tweenable
   * @param {Object=} opt_initialState The values that the initial tween should
   * start at if a `from` object is not provided to `{{#crossLink
   * "Tweenable/tween:method"}}{{/crossLink}}` or `{{#crossLink
   * "Tweenable/setConfig:method"}}{{/crossLink}}`.
   * @param {Object=} opt_config Configuration object to be passed to
   * `{{#crossLink "Tweenable/setConfig:method"}}{{/crossLink}}`.
   * @module Tweenable
   * @constructor
   */
  function Tweenable (opt_initialState, opt_config) {
    this._currentState = opt_initialState || {};
    this._configured = false;
    this._scheduleFunction = DEFAULT_SCHEDULE_FUNCTION;

    // To prevent unnecessary calls to setConfig do not set default
    // configuration here.  Only set default configuration immediately before
    // tweening if none has been set.
    if (typeof opt_config !== 'undefined') {
      this.setConfig(opt_config);
    }
  }

  /**
   * Configure and start a tween.
   * @method tween
   * @param {Object=} opt_config Configuration object to be passed to
   * `{{#crossLink "Tweenable/setConfig:method"}}{{/crossLink}}`.
   * @chainable
   */
  Tweenable.prototype.tween = function (opt_config) {
    if (this._isTweening) {
      return this;
    }

    // Only set default config if no configuration has been set previously and
    // none is provided now.
    if (opt_config !== undefined || !this._configured) {
      this.setConfig(opt_config);
    }

    this._timestamp = now();
    this._start(this.get(), this._attachment);
    return this.resume();
  };

  /**
   * Configure a tween that will start at some point in the future.
   *
   * @method setConfig
   * @param {Object} config The following values are valid:
   * - __from__ (_Object=_): Starting position.  If omitted, `{{#crossLink
   *   "Tweenable/get:method"}}get(){{/crossLink}}` is used.
   * - __to__ (_Object=_): Ending position.
   * - __duration__ (_number=_): How many milliseconds to animate for.
   * - __delay__ (_delay=_): How many milliseconds to wait before starting the
   *   tween.
   * - __start__ (_Function(Object, *)_): Function to execute when the tween
   *   begins.  Receives the state of the tween as the first parameter and
   *   `attachment` as the second parameter.
   * - __step__ (_Function(Object, *, number)_): Function to execute on every
   *   tick.  Receives `{{#crossLink
   *   "Tweenable/get:method"}}get(){{/crossLink}}` as the first parameter,
   *   `attachment` as the second parameter, and the time elapsed since the
   *   start of the tween as the third. This function is not called on the
   *   final step of the animation, but `finish` is.
   * - __finish__ (_Function(Object, *)_): Function to execute upon tween
   *   completion.  Receives the state of the tween as the first parameter and
   *   `attachment` as the second parameter.
   * - __easing__ (_Object.<string|Function>|string|Function=_): Easing curve
   *   name(s) or function(s) to use for the tween.
   * - __attachment__ (_*_): Cached value that is passed to the
   *   `step`/`start`/`finish` methods.
   * @chainable
   */
  Tweenable.prototype.setConfig = function (config) {
    config = config || {};
    this._configured = true;

    // Attach something to this Tweenable instance (e.g.: a DOM element, an
    // object, a string, etc.);
    this._attachment = config.attachment;

    // Init the internal state
    this._pausedAtTime = null;
    this._scheduleId = null;
    this._delay = config.delay || 0;
    this._start = config.start || noop;
    this._step = config.step || noop;
    this._finish = config.finish || noop;
    this._duration = config.duration || DEFAULT_DURATION;
    this._currentState = shallowCopy({}, config.from) || this.get();
    this._originalState = this.get();
    this._targetState = shallowCopy({}, config.to) || this.get();

    var self = this;
    this._timeoutHandler = function () {
      timeoutHandler(self,
        self._timestamp,
        self._delay,
        self._duration,
        self._currentState,
        self._originalState,
        self._targetState,
        self._easing,
        self._step,
        self._scheduleFunction
      );
    };

    // Aliases used below
    var currentState = this._currentState;
    var targetState = this._targetState;

    // Ensure that there is always something to tween to.
    defaults(targetState, currentState);

    this._easing = composeEasingObject(
      currentState, config.easing || DEFAULT_EASING);

    this._filterArgs =
      [currentState, this._originalState, targetState, this._easing];

    applyFilter(this, 'tweenCreated');
    return this;
  };

  /**
   * @method get
   * @return {Object} The current state.
   */
  Tweenable.prototype.get = function () {
    return shallowCopy({}, this._currentState);
  };

  /**
   * @method set
   * @param {Object} state The current state.
   */
  Tweenable.prototype.set = function (state) {
    this._currentState = state;
  };

  /**
   * Pause a tween.  Paused tweens can be resumed from the point at which they
   * were paused.  This is different from `{{#crossLink
   * "Tweenable/stop:method"}}{{/crossLink}}`, as that method
   * causes a tween to start over when it is resumed.
   * @method pause
   * @chainable
   */
  Tweenable.prototype.pause = function () {
    this._pausedAtTime = now();
    this._isPaused = true;
    return this;
  };

  /**
   * Resume a paused tween.
   * @method resume
   * @chainable
   */
  Tweenable.prototype.resume = function () {
    if (this._isPaused) {
      this._timestamp += now() - this._pausedAtTime;
    }

    this._isPaused = false;
    this._isTweening = true;

    this._timeoutHandler();

    return this;
  };

  /**
   * Move the state of the animation to a specific point in the tween's
   * timeline.  If the animation is not running, this will cause the `step`
   * handlers to be called.
   * @method seek
   * @param {millisecond} millisecond The millisecond of the animation to seek
   * to.  This must not be less than `0`.
   * @chainable
   */
  Tweenable.prototype.seek = function (millisecond) {
    millisecond = Math.max(millisecond, 0);
    var currentTime = now();

    if ((this._timestamp + millisecond) === 0) {
      return this;
    }

    this._timestamp = currentTime - millisecond;

    if (!this.isPlaying()) {
      this._isTweening = true;
      this._isPaused = false;

      // If the animation is not running, call timeoutHandler to make sure that
      // any step handlers are run.
      timeoutHandler(this,
        this._timestamp,
        this._delay,
        this._duration,
        this._currentState,
        this._originalState,
        this._targetState,
        this._easing,
        this._step,
        this._scheduleFunction,
        currentTime
      );

      this.pause();
    }

    return this;
  };

  /**
   * Stops and cancels a tween.
   * @param {boolean=} gotoEnd If `false` or omitted, the tween just stops at
   * its current state, and the `finish` handler is not invoked.  If `true`,
   * the tweened object's values are instantly set to the target values, and
   * `finish` is invoked.
   * @method stop
   * @chainable
   */
  Tweenable.prototype.stop = function (gotoEnd) {
    this._isTweening = false;
    this._isPaused = false;
    this._timeoutHandler = noop;

    (root.cancelAnimationFrame            ||
    root.webkitCancelAnimationFrame     ||
    root.oCancelAnimationFrame          ||
    root.msCancelAnimationFrame         ||
    root.mozCancelRequestAnimationFrame ||
    root.clearTimeout)(this._scheduleId);

    if (gotoEnd) {
      applyFilter(this, 'beforeTween');
      tweenProps(
        1,
        this._currentState,
        this._originalState,
        this._targetState,
        1,
        0,
        this._easing
      );
      applyFilter(this, 'afterTween');
      applyFilter(this, 'afterTweenEnd');
      this._finish.call(this, this._currentState, this._attachment);
    }

    return this;
  };

  /**
   * @method isPlaying
   * @return {boolean} Whether or not a tween is running.
   */
  Tweenable.prototype.isPlaying = function () {
    return this._isTweening && !this._isPaused;
  };

  /**
   * Set a custom schedule function.
   *
   * If a custom function is not set,
   * [`requestAnimationFrame`](https://developer.mozilla.org/en-US/docs/Web/API/window.requestAnimationFrame)
   * is used if available, otherwise
   * [`setTimeout`](https://developer.mozilla.org/en-US/docs/Web/API/Window.setTimeout)
   * is used.
   * @method setScheduleFunction
   * @param {Function(Function,number)} scheduleFunction The function to be
   * used to schedule the next frame to be rendered.
   */
  Tweenable.prototype.setScheduleFunction = function (scheduleFunction) {
    this._scheduleFunction = scheduleFunction;
  };

  /**
   * `delete` all "own" properties.  Call this when the `Tweenable` instance
   * is no longer needed to free memory.
   * @method dispose
   */
  Tweenable.prototype.dispose = function () {
    var prop;
    for (prop in this) {
      if (this.hasOwnProperty(prop)) {
        delete this[prop];
      }
    }
  };

  /**
   * Filters are used for transforming the properties of a tween at various
   * points in a Tweenable's life cycle.  See the README for more info on this.
   * @private
   */
  Tweenable.prototype.filter = {};

  /**
   * This object contains all of the tweens available to Shifty.  It is
   * extensible - simply attach properties to the `Tweenable.prototype.formula`
   * Object following the same format as `linear`.
   *
   * `pos` should be a normalized `number` (between 0 and 1).
   * @property formula
   * @type {Object(function)}
   */
  Tweenable.prototype.formula = {
    linear: function (pos) {
      return pos;
    }
  };

  formula = Tweenable.prototype.formula;

  shallowCopy(Tweenable, {
    'now': now
    ,'each': each
    ,'tweenProps': tweenProps
    ,'tweenProp': tweenProp
    ,'applyFilter': applyFilter
    ,'shallowCopy': shallowCopy
    ,'defaults': defaults
    ,'composeEasingObject': composeEasingObject
  });

  // `root` is provided in the intro/outro files.

  // A hook used for unit testing.
  if (typeof SHIFTY_DEBUG_NOW === 'function') {
    root.timeoutHandler = timeoutHandler;
  }

  // Bootstrap Tweenable appropriately for the environment.
  if (typeof exports === 'object') {
    // CommonJS
    module.exports = Tweenable;
  } else if (typeof define === 'function' && define.amd) {
    // AMD
    define(function () {return Tweenable;});
  } else if (typeof root.Tweenable === 'undefined') {
    // Browser: Make `Tweenable` globally accessible.
    root.Tweenable = Tweenable;
  }

  return Tweenable;

} ());

/*!
 * All equations are adapted from Thomas Fuchs'
 * [Scripty2](https://github.com/madrobby/scripty2/blob/master/src/effects/transitions/penner.js).
 *
 * Based on Easing Equations (c) 2003 [Robert
 * Penner](http://www.robertpenner.com/), all rights reserved. This work is
 * [subject to terms](http://www.robertpenner.com/easing_terms_of_use.html).
 */

/*!
 *  TERMS OF USE - EASING EQUATIONS
 *  Open source under the BSD License.
 *  Easing Equations (c) 2003 Robert Penner, all rights reserved.
 */

;(function () {

  Tweenable.shallowCopy(Tweenable.prototype.formula, {
    easeInQuad: function (pos) {
      return Math.pow(pos, 2);
    },

    easeOutQuad: function (pos) {
      return -(Math.pow((pos - 1), 2) - 1);
    },

    easeInOutQuad: function (pos) {
      if ((pos /= 0.5) < 1) {return 0.5 * Math.pow(pos,2);}
      return -0.5 * ((pos -= 2) * pos - 2);
    },

    easeInCubic: function (pos) {
      return Math.pow(pos, 3);
    },

    easeOutCubic: function (pos) {
      return (Math.pow((pos - 1), 3) + 1);
    },

    easeInOutCubic: function (pos) {
      if ((pos /= 0.5) < 1) {return 0.5 * Math.pow(pos,3);}
      return 0.5 * (Math.pow((pos - 2),3) + 2);
    },

    easeInQuart: function (pos) {
      return Math.pow(pos, 4);
    },

    easeOutQuart: function (pos) {
      return -(Math.pow((pos - 1), 4) - 1);
    },

    easeInOutQuart: function (pos) {
      if ((pos /= 0.5) < 1) {return 0.5 * Math.pow(pos,4);}
      return -0.5 * ((pos -= 2) * Math.pow(pos,3) - 2);
    },

    easeInQuint: function (pos) {
      return Math.pow(pos, 5);
    },

    easeOutQuint: function (pos) {
      return (Math.pow((pos - 1), 5) + 1);
    },

    easeInOutQuint: function (pos) {
      if ((pos /= 0.5) < 1) {return 0.5 * Math.pow(pos,5);}
      return 0.5 * (Math.pow((pos - 2),5) + 2);
    },

    easeInSine: function (pos) {
      return -Math.cos(pos * (Math.PI / 2)) + 1;
    },

    easeOutSine: function (pos) {
      return Math.sin(pos * (Math.PI / 2));
    },

    easeInOutSine: function (pos) {
      return (-0.5 * (Math.cos(Math.PI * pos) - 1));
    },

    easeInExpo: function (pos) {
      return (pos === 0) ? 0 : Math.pow(2, 10 * (pos - 1));
    },

    easeOutExpo: function (pos) {
      return (pos === 1) ? 1 : -Math.pow(2, -10 * pos) + 1;
    },

    easeInOutExpo: function (pos) {
      if (pos === 0) {return 0;}
      if (pos === 1) {return 1;}
      if ((pos /= 0.5) < 1) {return 0.5 * Math.pow(2,10 * (pos - 1));}
      return 0.5 * (-Math.pow(2, -10 * --pos) + 2);
    },

    easeInCirc: function (pos) {
      return -(Math.sqrt(1 - (pos * pos)) - 1);
    },

    easeOutCirc: function (pos) {
      return Math.sqrt(1 - Math.pow((pos - 1), 2));
    },

    easeInOutCirc: function (pos) {
      if ((pos /= 0.5) < 1) {return -0.5 * (Math.sqrt(1 - pos * pos) - 1);}
      return 0.5 * (Math.sqrt(1 - (pos -= 2) * pos) + 1);
    },

    easeOutBounce: function (pos) {
      if ((pos) < (1 / 2.75)) {
        return (7.5625 * pos * pos);
      } else if (pos < (2 / 2.75)) {
        return (7.5625 * (pos -= (1.5 / 2.75)) * pos + 0.75);
      } else if (pos < (2.5 / 2.75)) {
        return (7.5625 * (pos -= (2.25 / 2.75)) * pos + 0.9375);
      } else {
        return (7.5625 * (pos -= (2.625 / 2.75)) * pos + 0.984375);
      }
    },

    easeInBack: function (pos) {
      var s = 1.70158;
      return (pos) * pos * ((s + 1) * pos - s);
    },

    easeOutBack: function (pos) {
      var s = 1.70158;
      return (pos = pos - 1) * pos * ((s + 1) * pos + s) + 1;
    },

    easeInOutBack: function (pos) {
      var s = 1.70158;
      if ((pos /= 0.5) < 1) {
        return 0.5 * (pos * pos * (((s *= (1.525)) + 1) * pos - s));
      }
      return 0.5 * ((pos -= 2) * pos * (((s *= (1.525)) + 1) * pos + s) + 2);
    },

    elastic: function (pos) {
      // jshint maxlen:90
      return -1 * Math.pow(4,-8 * pos) * Math.sin((pos * 6 - 1) * (2 * Math.PI) / 2) + 1;
    },

    swingFromTo: function (pos) {
      var s = 1.70158;
      return ((pos /= 0.5) < 1) ?
          0.5 * (pos * pos * (((s *= (1.525)) + 1) * pos - s)) :
          0.5 * ((pos -= 2) * pos * (((s *= (1.525)) + 1) * pos + s) + 2);
    },

    swingFrom: function (pos) {
      var s = 1.70158;
      return pos * pos * ((s + 1) * pos - s);
    },

    swingTo: function (pos) {
      var s = 1.70158;
      return (pos -= 1) * pos * ((s + 1) * pos + s) + 1;
    },

    bounce: function (pos) {
      if (pos < (1 / 2.75)) {
        return (7.5625 * pos * pos);
      } else if (pos < (2 / 2.75)) {
        return (7.5625 * (pos -= (1.5 / 2.75)) * pos + 0.75);
      } else if (pos < (2.5 / 2.75)) {
        return (7.5625 * (pos -= (2.25 / 2.75)) * pos + 0.9375);
      } else {
        return (7.5625 * (pos -= (2.625 / 2.75)) * pos + 0.984375);
      }
    },

    bouncePast: function (pos) {
      if (pos < (1 / 2.75)) {
        return (7.5625 * pos * pos);
      } else if (pos < (2 / 2.75)) {
        return 2 - (7.5625 * (pos -= (1.5 / 2.75)) * pos + 0.75);
      } else if (pos < (2.5 / 2.75)) {
        return 2 - (7.5625 * (pos -= (2.25 / 2.75)) * pos + 0.9375);
      } else {
        return 2 - (7.5625 * (pos -= (2.625 / 2.75)) * pos + 0.984375);
      }
    },

    easeFromTo: function (pos) {
      if ((pos /= 0.5) < 1) {return 0.5 * Math.pow(pos,4);}
      return -0.5 * ((pos -= 2) * Math.pow(pos,3) - 2);
    },

    easeFrom: function (pos) {
      return Math.pow(pos,4);
    },

    easeTo: function (pos) {
      return Math.pow(pos,0.25);
    }
  });

}());

// jshint maxlen:100
/**
 * The Bezier magic in this file is adapted/copied almost wholesale from
 * [Scripty2](https://github.com/madrobby/scripty2/blob/master/src/effects/transitions/cubic-bezier.js),
 * which was adapted from Apple code (which probably came from
 * [here](http://opensource.apple.com/source/WebCore/WebCore-955.66/platform/graphics/UnitBezier.h)).
 * Special thanks to Apple and Thomas Fuchs for much of this code.
 */

/**
 *  Copyright (c) 2006 Apple Computer, Inc. All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions are met:
 *
 *  1. Redistributions of source code must retain the above copyright notice,
 *  this list of conditions and the following disclaimer.
 *
 *  2. Redistributions in binary form must reproduce the above copyright notice,
 *  this list of conditions and the following disclaimer in the documentation
 *  and/or other materials provided with the distribution.
 *
 *  3. Neither the name of the copyright holder(s) nor the names of any
 *  contributors may be used to endorse or promote products derived from
 *  this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 *  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 *  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 *  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 *  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 *  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 *  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 *  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 *  POSSIBILITY OF SUCH DAMAGE.
 */
;(function () {
  // port of webkit cubic bezier handling by http://www.netzgesta.de/dev/
  function cubicBezierAtTime(t,p1x,p1y,p2x,p2y,duration) {
    var ax = 0,bx = 0,cx = 0,ay = 0,by = 0,cy = 0;
    function sampleCurveX(t) {
      return ((ax * t + bx) * t + cx) * t;
    }
    function sampleCurveY(t) {
      return ((ay * t + by) * t + cy) * t;
    }
    function sampleCurveDerivativeX(t) {
      return (3.0 * ax * t + 2.0 * bx) * t + cx;
    }
    function solveEpsilon(duration) {
      return 1.0 / (200.0 * duration);
    }
    function solve(x,epsilon) {
      return sampleCurveY(solveCurveX(x, epsilon));
    }
    function fabs(n) {
      if (n >= 0) {
        return n;
      } else {
        return 0 - n;
      }
    }
    function solveCurveX(x, epsilon) {
      var t0,t1,t2,x2,d2,i;
      for (t2 = x, i = 0; i < 8; i++) {
        x2 = sampleCurveX(t2) - x;
        if (fabs(x2) < epsilon) {
          return t2;
        }
        d2 = sampleCurveDerivativeX(t2);
        if (fabs(d2) < 1e-6) {
          break;
        }
        t2 = t2 - x2 / d2;
      }
      t0 = 0.0;
      t1 = 1.0;
      t2 = x;
      if (t2 < t0) {
        return t0;
      }
      if (t2 > t1) {
        return t1;
      }
      while (t0 < t1) {
        x2 = sampleCurveX(t2);
        if (fabs(x2 - x) < epsilon) {
          return t2;
        }
        if (x > x2) {
          t0 = t2;
        }else {
          t1 = t2;
        }
        t2 = (t1 - t0) * 0.5 + t0;
      }
      return t2; // Failure.
    }
    cx = 3.0 * p1x;
    bx = 3.0 * (p2x - p1x) - cx;
    ax = 1.0 - cx - bx;
    cy = 3.0 * p1y;
    by = 3.0 * (p2y - p1y) - cy;
    ay = 1.0 - cy - by;
    return solve(t, solveEpsilon(duration));
  }
  /**
   *  getCubicBezierTransition(x1, y1, x2, y2) -> Function
   *
   *  Generates a transition easing function that is compatible
   *  with WebKit's CSS transitions `-webkit-transition-timing-function`
   *  CSS property.
   *
   *  The W3C has more information about CSS3 transition timing functions:
   *  http://www.w3.org/TR/css3-transitions/#transition-timing-function_tag
   *
   *  @param {number} x1
   *  @param {number} y1
   *  @param {number} x2
   *  @param {number} y2
   *  @return {function}
   *  @private
   */
  function getCubicBezierTransition (x1, y1, x2, y2) {
    return function (pos) {
      return cubicBezierAtTime(pos,x1,y1,x2,y2,1);
    };
  }
  // End ported code

  /**
   * Create a Bezier easing function and attach it to `{{#crossLink
   * "Tweenable/formula:property"}}Tweenable#formula{{/crossLink}}`.  This
   * function gives you total control over the easing curve.  Matthew Lein's
   * [Ceaser](http://matthewlein.com/ceaser/) is a useful tool for visualizing
   * the curves you can make with this function.
   * @method setBezierFunction
   * @param {string} name The name of the easing curve.  Overwrites the old
   * easing function on `{{#crossLink
   * "Tweenable/formula:property"}}Tweenable#formula{{/crossLink}}` if it
   * exists.
   * @param {number} x1
   * @param {number} y1
   * @param {number} x2
   * @param {number} y2
   * @return {function} The easing function that was attached to
   * Tweenable.prototype.formula.
   */
  Tweenable.setBezierFunction = function (name, x1, y1, x2, y2) {
    var cubicBezierTransition = getCubicBezierTransition(x1, y1, x2, y2);
    cubicBezierTransition.displayName = name;
    cubicBezierTransition.x1 = x1;
    cubicBezierTransition.y1 = y1;
    cubicBezierTransition.x2 = x2;
    cubicBezierTransition.y2 = y2;

    return Tweenable.prototype.formula[name] = cubicBezierTransition;
  };


  /**
   * `delete` an easing function from `{{#crossLink
   * "Tweenable/formula:property"}}Tweenable#formula{{/crossLink}}`.  Be
   * careful with this method, as it `delete`s whatever easing formula matches
   * `name` (which means you can delete standard Shifty easing functions).
   * @method unsetBezierFunction
   * @param {string} name The name of the easing function to delete.
   * @return {function}
   */
  Tweenable.unsetBezierFunction = function (name) {
    delete Tweenable.prototype.formula[name];
  };

})();

;(function () {

  function getInterpolatedValues (
    from, current, targetState, position, easing, delay) {
    return Tweenable.tweenProps(
      position, current, from, targetState, 1, delay, easing);
  }

  // Fake a Tweenable and patch some internals.  This approach allows us to
  // skip uneccessary processing and object recreation, cutting down on garbage
  // collection pauses.
  var mockTweenable = new Tweenable();
  mockTweenable._filterArgs = [];

  /**
   * Compute the midpoint of two Objects.  This method effectively calculates a
   * specific frame of animation that `{{#crossLink
   * "Tweenable/tween:method"}}{{/crossLink}}` does many times over the course
   * of a full tween.
   *
   *     var interpolatedValues = Tweenable.interpolate({
   *       width: '100px',
   *       opacity: 0,
   *       color: '#fff'
   *     }, {
   *       width: '200px',
   *       opacity: 1,
   *       color: '#000'
   *     }, 0.5);
   *
   *     console.log(interpolatedValues);
   *     // {opacity: 0.5, width: "150px", color: "rgb(127,127,127)"}
   *
   * @static
   * @method interpolate
   * @param {Object} from The starting values to tween from.
   * @param {Object} targetState The ending values to tween to.
   * @param {number} position The normalized position value (between `0.0` and
   * `1.0`) to interpolate the values between `from` and `to` for.  `from`
   * represents `0` and `to` represents `1`.
   * @param {Object.<string|Function>|string|Function} easing The easing
   * curve(s) to calculate the midpoint against.  You can reference any easing
   * function attached to `Tweenable.prototype.formula`, or provide the easing
   * function(s) directly.  If omitted, this defaults to "linear".
   * @param {number=} opt_delay Optional delay to pad the beginning of the
   * interpolated tween with.  This increases the range of `position` from (`0`
   * through `1`) to (`0` through `1 + opt_delay`).  So, a delay of `0.5` would
   * increase all valid values of `position` to numbers between `0` and `1.5`.
   * @return {Object}
   */
  Tweenable.interpolate = function (
    from, targetState, position, easing, opt_delay) {

    var current = Tweenable.shallowCopy({}, from);
    var delay = opt_delay || 0;
    var easingObject = Tweenable.composeEasingObject(
      from, easing || 'linear');

    mockTweenable.set({});

    // Alias and reuse the _filterArgs array instead of recreating it.
    var filterArgs = mockTweenable._filterArgs;
    filterArgs.length = 0;
    filterArgs[0] = current;
    filterArgs[1] = from;
    filterArgs[2] = targetState;
    filterArgs[3] = easingObject;

    // Any defined value transformation must be applied
    Tweenable.applyFilter(mockTweenable, 'tweenCreated');
    Tweenable.applyFilter(mockTweenable, 'beforeTween');

    var interpolatedValues = getInterpolatedValues(
      from, current, targetState, position, easingObject, delay);

    // Transform values back into their original format
    Tweenable.applyFilter(mockTweenable, 'afterTween');

    return interpolatedValues;
  };

}());

/**
 * This module adds string interpolation support to Shifty.
 *
 * The Token extension allows Shifty to tween numbers inside of strings.  Among
 * other things, this allows you to animate CSS properties.  For example, you
 * can do this:
 *
 *     var tweenable = new Tweenable();
 *     tweenable.tween({
 *       from: { transform: 'translateX(45px)' },
 *       to: { transform: 'translateX(90xp)' }
 *     });
 *
 * `translateX(45)` will be tweened to `translateX(90)`.  To demonstrate:
 *
 *     var tweenable = new Tweenable();
 *     tweenable.tween({
 *       from: { transform: 'translateX(45px)' },
 *       to: { transform: 'translateX(90px)' },
 *       step: function (state) {
 *         console.log(state.transform);
 *       }
 *     });
 *
 * The above snippet will log something like this in the console:
 *
 *     translateX(60.3px)
 *     ...
 *     translateX(76.05px)
 *     ...
 *     translateX(90px)
 *
 * Another use for this is animating colors:
 *
 *     var tweenable = new Tweenable();
 *     tweenable.tween({
 *       from: { color: 'rgb(0,255,0)' },
 *       to: { color: 'rgb(255,0,255)' },
 *       step: function (state) {
 *         console.log(state.color);
 *       }
 *     });
 *
 * The above snippet will log something like this:
 *
 *     rgb(84,170,84)
 *     ...
 *     rgb(170,84,170)
 *     ...
 *     rgb(255,0,255)
 *
 * This extension also supports hexadecimal colors, in both long (`#ff00ff`)
 * and short (`#f0f`) forms.  Be aware that hexadecimal input values will be
 * converted into the equivalent RGB output values.  This is done to optimize
 * for performance.
 *
 *     var tweenable = new Tweenable();
 *     tweenable.tween({
 *       from: { color: '#0f0' },
 *       to: { color: '#f0f' },
 *       step: function (state) {
 *         console.log(state.color);
 *       }
 *     });
 *
 * This snippet will generate the same output as the one before it because
 * equivalent values were supplied (just in hexadecimal form rather than RGB):
 *
 *     rgb(84,170,84)
 *     ...
 *     rgb(170,84,170)
 *     ...
 *     rgb(255,0,255)
 *
 * ## Easing support
 *
 * Easing works somewhat differently in the Token extension.  This is because
 * some CSS properties have multiple values in them, and you might need to
 * tween each value along its own easing curve.  A basic example:
 *
 *     var tweenable = new Tweenable();
 *     tweenable.tween({
 *       from: { transform: 'translateX(0px) translateY(0px)' },
 *       to: { transform:   'translateX(100px) translateY(100px)' },
 *       easing: { transform: 'easeInQuad' },
 *       step: function (state) {
 *         console.log(state.transform);
 *       }
 *     });
 *
 * The above snippet will create values like this:
 *
 *     translateX(11.56px) translateY(11.56px)
 *     ...
 *     translateX(46.24px) translateY(46.24px)
 *     ...
 *     translateX(100px) translateY(100px)
 *
 * In this case, the values for `translateX` and `translateY` are always the
 * same for each step of the tween, because they have the same start and end
 * points and both use the same easing curve.  We can also tween `translateX`
 * and `translateY` along independent curves:
 *
 *     var tweenable = new Tweenable();
 *     tweenable.tween({
 *       from: { transform: 'translateX(0px) translateY(0px)' },
 *       to: { transform:   'translateX(100px) translateY(100px)' },
 *       easing: { transform: 'easeInQuad bounce' },
 *       step: function (state) {
 *         console.log(state.transform);
 *       }
 *     });
 *
 * The above snippet will create values like this:
 *
 *     translateX(10.89px) translateY(82.35px)
 *     ...
 *     translateX(44.89px) translateY(86.73px)
 *     ...
 *     translateX(100px) translateY(100px)
 *
 * `translateX` and `translateY` are not in sync anymore, because `easeInQuad`
 * was specified for `translateX` and `bounce` for `translateY`.  Mixing and
 * matching easing curves can make for some interesting motion in your
 * animations.
 *
 * The order of the space-separated easing curves correspond the token values
 * they apply to.  If there are more token values than easing curves listed,
 * the last easing curve listed is used.
 * @submodule Tweenable.token
 */

// token function is defined above only so that dox-foundation sees it as
// documentation and renders it.  It is never used, and is optimized away at
// build time.

;(function (Tweenable) {

  /**
   * @typedef {{
   *   formatString: string
   *   chunkNames: Array.<string>
   * }}
   * @private
   */
  var formatManifest;

  // CONSTANTS

  var R_NUMBER_COMPONENT = /(\d|\-|\.)/;
  var R_FORMAT_CHUNKS = /([^\-0-9\.]+)/g;
  var R_UNFORMATTED_VALUES = /[0-9.\-]+/g;
  var R_RGB = new RegExp(
    'rgb\\(' + R_UNFORMATTED_VALUES.source +
    (/,\s*/.source) + R_UNFORMATTED_VALUES.source +
    (/,\s*/.source) + R_UNFORMATTED_VALUES.source + '\\)', 'g');
  var R_RGB_PREFIX = /^.*\(/;
  var R_HEX = /#([0-9]|[a-f]){3,6}/gi;
  var VALUE_PLACEHOLDER = 'VAL';

  // HELPERS

  /**
   * @param {Array.number} rawValues
   * @param {string} prefix
   *
   * @return {Array.<string>}
   * @private
   */
  function getFormatChunksFrom (rawValues, prefix) {
    var accumulator = [];

    var rawValuesLength = rawValues.length;
    var i;

    for (i = 0; i < rawValuesLength; i++) {
      accumulator.push('_' + prefix + '_' + i);
    }

    return accumulator;
  }

  /**
   * @param {string} formattedString
   *
   * @return {string}
   * @private
   */
  function getFormatStringFrom (formattedString) {
    var chunks = formattedString.match(R_FORMAT_CHUNKS);

    if (!chunks) {
      // chunks will be null if there were no tokens to parse in
      // formattedString (for example, if formattedString is '2').  Coerce
      // chunks to be useful here.
      chunks = ['', ''];

      // If there is only one chunk, assume that the string is a number
      // followed by a token...
      // NOTE: This may be an unwise assumption.
    } else if (chunks.length === 1 ||
      // ...or if the string starts with a number component (".", "-", or a
      // digit)...
    formattedString[0].match(R_NUMBER_COMPONENT)) {
      // ...prepend an empty string here to make sure that the formatted number
      // is properly replaced by VALUE_PLACEHOLDER
      chunks.unshift('');
    }

    return chunks.join(VALUE_PLACEHOLDER);
  }

  /**
   * Convert all hex color values within a string to an rgb string.
   *
   * @param {Object} stateObject
   *
   * @return {Object} The modified obj
   * @private
   */
  function sanitizeObjectForHexProps (stateObject) {
    Tweenable.each(stateObject, function (prop) {
      var currentProp = stateObject[prop];

      if (typeof currentProp === 'string' && currentProp.match(R_HEX)) {
        stateObject[prop] = sanitizeHexChunksToRGB(currentProp);
      }
    });
  }

  /**
   * @param {string} str
   *
   * @return {string}
   * @private
   */
  function  sanitizeHexChunksToRGB (str) {
    return filterStringChunks(R_HEX, str, convertHexToRGB);
  }

  /**
   * @param {string} hexString
   *
   * @return {string}
   * @private
   */
  function convertHexToRGB (hexString) {
    var rgbArr = hexToRGBArray(hexString);
    return 'rgb(' + rgbArr[0] + ',' + rgbArr[1] + ',' + rgbArr[2] + ')';
  }

  var hexToRGBArray_returnArray = [];
  /**
   * Convert a hexadecimal string to an array with three items, one each for
   * the red, blue, and green decimal values.
   *
   * @param {string} hex A hexadecimal string.
   *
   * @returns {Array.<number>} The converted Array of RGB values if `hex` is a
   * valid string, or an Array of three 0's.
   * @private
   */
  function hexToRGBArray (hex) {

    hex = hex.replace(/#/, '');

    // If the string is a shorthand three digit hex notation, normalize it to
    // the standard six digit notation
    if (hex.length === 3) {
      hex = hex.split('');
      hex = hex[0] + hex[0] + hex[1] + hex[1] + hex[2] + hex[2];
    }

    hexToRGBArray_returnArray[0] = hexToDec(hex.substr(0, 2));
    hexToRGBArray_returnArray[1] = hexToDec(hex.substr(2, 2));
    hexToRGBArray_returnArray[2] = hexToDec(hex.substr(4, 2));

    return hexToRGBArray_returnArray;
  }

  /**
   * Convert a base-16 number to base-10.
   *
   * @param {Number|String} hex The value to convert
   *
   * @returns {Number} The base-10 equivalent of `hex`.
   * @private
   */
  function hexToDec (hex) {
    return parseInt(hex, 16);
  }

  /**
   * Runs a filter operation on all chunks of a string that match a RegExp
   *
   * @param {RegExp} pattern
   * @param {string} unfilteredString
   * @param {function(string)} filter
   *
   * @return {string}
   * @private
   */
  function filterStringChunks (pattern, unfilteredString, filter) {
    var pattenMatches = unfilteredString.match(pattern);
    var filteredString = unfilteredString.replace(pattern, VALUE_PLACEHOLDER);

    if (pattenMatches) {
      var pattenMatchesLength = pattenMatches.length;
      var currentChunk;

      for (var i = 0; i < pattenMatchesLength; i++) {
        currentChunk = pattenMatches.shift();
        filteredString = filteredString.replace(
          VALUE_PLACEHOLDER, filter(currentChunk));
      }
    }

    return filteredString;
  }

  /**
   * Check for floating point values within rgb strings and rounds them.
   *
   * @param {string} formattedString
   *
   * @return {string}
   * @private
   */
  function sanitizeRGBChunks (formattedString) {
    return filterStringChunks(R_RGB, formattedString, sanitizeRGBChunk);
  }

  /**
   * @param {string} rgbChunk
   *
   * @return {string}
   * @private
   */
  function sanitizeRGBChunk (rgbChunk) {
    var numbers = rgbChunk.match(R_UNFORMATTED_VALUES);
    var numbersLength = numbers.length;
    var sanitizedString = rgbChunk.match(R_RGB_PREFIX)[0];

    for (var i = 0; i < numbersLength; i++) {
      sanitizedString += parseInt(numbers[i], 10) + ',';
    }

    sanitizedString = sanitizedString.slice(0, -1) + ')';

    return sanitizedString;
  }

  /**
   * @param {Object} stateObject
   *
   * @return {Object} An Object of formatManifests that correspond to
   * the string properties of stateObject
   * @private
   */
  function getFormatManifests (stateObject) {
    var manifestAccumulator = {};

    Tweenable.each(stateObject, function (prop) {
      var currentProp = stateObject[prop];

      if (typeof currentProp === 'string') {
        var rawValues = getValuesFrom(currentProp);

        manifestAccumulator[prop] = {
          'formatString': getFormatStringFrom(currentProp)
          ,'chunkNames': getFormatChunksFrom(rawValues, prop)
        };
      }
    });

    return manifestAccumulator;
  }

  /**
   * @param {Object} stateObject
   * @param {Object} formatManifests
   * @private
   */
  function expandFormattedProperties (stateObject, formatManifests) {
    Tweenable.each(formatManifests, function (prop) {
      var currentProp = stateObject[prop];
      var rawValues = getValuesFrom(currentProp);
      var rawValuesLength = rawValues.length;

      for (var i = 0; i < rawValuesLength; i++) {
        stateObject[formatManifests[prop].chunkNames[i]] = +rawValues[i];
      }

      delete stateObject[prop];
    });
  }

  /**
   * @param {Object} stateObject
   * @param {Object} formatManifests
   * @private
   */
  function collapseFormattedProperties (stateObject, formatManifests) {
    Tweenable.each(formatManifests, function (prop) {
      var currentProp = stateObject[prop];
      var formatChunks = extractPropertyChunks(
        stateObject, formatManifests[prop].chunkNames);
      var valuesList = getValuesList(
        formatChunks, formatManifests[prop].chunkNames);
      currentProp = getFormattedValues(
        formatManifests[prop].formatString, valuesList);
      stateObject[prop] = sanitizeRGBChunks(currentProp);
    });
  }

  /**
   * @param {Object} stateObject
   * @param {Array.<string>} chunkNames
   *
   * @return {Object} The extracted value chunks.
   * @private
   */
  function extractPropertyChunks (stateObject, chunkNames) {
    var extractedValues = {};
    var currentChunkName, chunkNamesLength = chunkNames.length;

    for (var i = 0; i < chunkNamesLength; i++) {
      currentChunkName = chunkNames[i];
      extractedValues[currentChunkName] = stateObject[currentChunkName];
      delete stateObject[currentChunkName];
    }

    return extractedValues;
  }

  var getValuesList_accumulator = [];
  /**
   * @param {Object} stateObject
   * @param {Array.<string>} chunkNames
   *
   * @return {Array.<number>}
   * @private
   */
  function getValuesList (stateObject, chunkNames) {
    getValuesList_accumulator.length = 0;
    var chunkNamesLength = chunkNames.length;

    for (var i = 0; i < chunkNamesLength; i++) {
      getValuesList_accumulator.push(stateObject[chunkNames[i]]);
    }

    return getValuesList_accumulator;
  }

  /**
   * @param {string} formatString
   * @param {Array.<number>} rawValues
   *
   * @return {string}
   * @private
   */
  function getFormattedValues (formatString, rawValues) {
    var formattedValueString = formatString;
    var rawValuesLength = rawValues.length;

    for (var i = 0; i < rawValuesLength; i++) {
      formattedValueString = formattedValueString.replace(
        VALUE_PLACEHOLDER, +rawValues[i].toFixed(4));
    }

    return formattedValueString;
  }

  /**
   * Note: It's the duty of the caller to convert the Array elements of the
   * return value into numbers.  This is a performance optimization.
   *
   * @param {string} formattedString
   *
   * @return {Array.<string>|null}
   * @private
   */
  function getValuesFrom (formattedString) {
    return formattedString.match(R_UNFORMATTED_VALUES);
  }

  /**
   * @param {Object} easingObject
   * @param {Object} tokenData
   * @private
   */
  function expandEasingObject (easingObject, tokenData) {
    Tweenable.each(tokenData, function (prop) {
      var currentProp = tokenData[prop];
      var chunkNames = currentProp.chunkNames;
      var chunkLength = chunkNames.length;

      var easing = easingObject[prop];
      var i;

      if (typeof easing === 'string') {
        var easingChunks = easing.split(' ');
        var lastEasingChunk = easingChunks[easingChunks.length - 1];

        for (i = 0; i < chunkLength; i++) {
          easingObject[chunkNames[i]] = easingChunks[i] || lastEasingChunk;
        }

      } else {
        for (i = 0; i < chunkLength; i++) {
          easingObject[chunkNames[i]] = easing;
        }
      }

      delete easingObject[prop];
    });
  }

  /**
   * @param {Object} easingObject
   * @param {Object} tokenData
   * @private
   */
  function collapseEasingObject (easingObject, tokenData) {
    Tweenable.each(tokenData, function (prop) {
      var currentProp = tokenData[prop];
      var chunkNames = currentProp.chunkNames;
      var chunkLength = chunkNames.length;

      var firstEasing = easingObject[chunkNames[0]];
      var typeofEasings = typeof firstEasing;

      if (typeofEasings === 'string') {
        var composedEasingString = '';

        for (var i = 0; i < chunkLength; i++) {
          composedEasingString += ' ' + easingObject[chunkNames[i]];
          delete easingObject[chunkNames[i]];
        }

        easingObject[prop] = composedEasingString.substr(1);
      } else {
        easingObject[prop] = firstEasing;
      }
    });
  }

  Tweenable.prototype.filter.token = {
    'tweenCreated': function (currentState, fromState, toState, easingObject) {
      sanitizeObjectForHexProps(currentState);
      sanitizeObjectForHexProps(fromState);
      sanitizeObjectForHexProps(toState);
      this._tokenData = getFormatManifests(currentState);
    },

    'beforeTween': function (currentState, fromState, toState, easingObject) {
      expandEasingObject(easingObject, this._tokenData);
      expandFormattedProperties(currentState, this._tokenData);
      expandFormattedProperties(fromState, this._tokenData);
      expandFormattedProperties(toState, this._tokenData);
    },

    'afterTween': function (currentState, fromState, toState, easingObject) {
      collapseFormattedProperties(currentState, this._tokenData);
      collapseFormattedProperties(fromState, this._tokenData);
      collapseFormattedProperties(toState, this._tokenData);
      collapseEasingObject(easingObject, this._tokenData);
    }
  };

} (Tweenable));

}).call(null);

},{}],2:[function(require,module,exports){
// Circle shaped progress bar

var Shape = require('./shape');
var utils = require('./utils');

var Circle = function Circle(container, options) {
    // Use two arcs to form a circle
    // See this answer http://stackoverflow.com/a/10477334/1446092
    this._pathTemplate =
        'M 50,50 m 0,-{radius}' +
        ' a {radius},{radius} 0 1 1 0,{2radius}' +
        ' a {radius},{radius} 0 1 1 0,-{2radius}';

    this.containerAspectRatio = 1;

    Shape.apply(this, arguments);
};

Circle.prototype = new Shape();
Circle.prototype.constructor = Circle;

Circle.prototype._pathString = function _pathString(opts) {
    var widthOfWider = opts.strokeWidth;
    if (opts.trailWidth && opts.trailWidth > opts.strokeWidth) {
        widthOfWider = opts.trailWidth;
    }

    var r = 50 - widthOfWider / 2;

    return utils.render(this._pathTemplate, {
        radius: r,
        '2radius': r * 2
    });
};

Circle.prototype._trailString = function _trailString(opts) {
    return this._pathString(opts);
};

module.exports = Circle;

},{"./shape":7,"./utils":8}],3:[function(require,module,exports){
// Line shaped progress bar

var Shape = require('./shape');
var utils = require('./utils');

var Line = function Line(container, options) {
    this._pathTemplate = 'M 0,{center} L 100,{center}';
    Shape.apply(this, arguments);
};

Line.prototype = new Shape();
Line.prototype.constructor = Line;

Line.prototype._initializeSvg = function _initializeSvg(svg, opts) {
    svg.setAttribute('viewBox', '0 0 100 ' + opts.strokeWidth);
    svg.setAttribute('preserveAspectRatio', 'none');
};

Line.prototype._pathString = function _pathString(opts) {
    return utils.render(this._pathTemplate, {
        center: opts.strokeWidth / 2
    });
};

Line.prototype._trailString = function _trailString(opts) {
    return this._pathString(opts);
};

module.exports = Line;

},{"./shape":7,"./utils":8}],4:[function(require,module,exports){
module.exports = {
    // Higher level API, different shaped progress bars
    Line: require('./line'),
    Circle: require('./circle'),
    SemiCircle: require('./semicircle'),

    // Lower level API to use any SVG path
    Path: require('./path'),

    // Base-class for creating new custom shapes
    // to be in line with the API of built-in shapes
    // Undocumented.
    Shape: require('./shape'),

    // Internal utils, undocumented.
    utils: require('./utils')
};

},{"./circle":2,"./line":3,"./path":5,"./semicircle":6,"./shape":7,"./utils":8}],5:[function(require,module,exports){
// Lower level API to animate any kind of svg path

var Tweenable = require('shifty');
var utils = require('./utils');

var EASING_ALIASES = {
    easeIn: 'easeInCubic',
    easeOut: 'easeOutCubic',
    easeInOut: 'easeInOutCubic'
};

var Path = function Path(path, opts) {
    // Throw a better error if not initialized with `new` keyword
    if (!(this instanceof Path)) {
        throw new Error('Constructor was called without new keyword');
    }

    // Default parameters for animation
    opts = utils.extend({
        duration: 800,
        easing: 'linear',
        from: {},
        to: {},
        step: function() {}
    }, opts);

    var element;
    if (utils.isString(path)) {
        element = document.querySelector(path);
    } else {
        element = path;
    }

    // Reveal .path as public attribute
    this.path = element;
    this._opts = opts;
    this._tweenable = null;

    // Set up the starting positions
    var length = this.path.getTotalLength();
    this.path.style.strokeDasharray = length + ' ' + length;
    this.set(0);
};

Path.prototype.value = function value() {
    var offset = this._getComputedDashOffset();
    var length = this.path.getTotalLength();

    var progress = 1 - offset / length;
    // Round number to prevent returning very small number like 1e-30, which
    // is practically 0
    return parseFloat(progress.toFixed(6), 10);
};

Path.prototype.set = function set(progress) {
    this.stop();

    this.path.style.strokeDashoffset = this._progressToOffset(progress);

    var step = this._opts.step;
    if (utils.isFunction(step)) {
        var easing = this._easing(this._opts.easing);
        var values = this._calculateTo(progress, easing);
        var reference = this._opts.shape || this;
        step(values, reference, this._opts.attachment);
    }
};

Path.prototype.stop = function stop() {
    this._stopTween();
    this.path.style.strokeDashoffset = this._getComputedDashOffset();
};

// Method introduced here:
// http://jakearchibald.com/2013/animated-line-drawing-svg/
Path.prototype.animate = function animate(progress, opts, cb) {
    opts = opts || {};

    if (utils.isFunction(opts)) {
        cb = opts;
        opts = {};
    }

    var passedOpts = utils.extend({}, opts);

    // Copy default opts to new object so defaults are not modified
    var defaultOpts = utils.extend({}, this._opts);
    opts = utils.extend(defaultOpts, opts);

    var shiftyEasing = this._easing(opts.easing);
    var values = this._resolveFromAndTo(progress, shiftyEasing, passedOpts);

    this.stop();

    // Trigger a layout so styles are calculated & the browser
    // picks up the starting position before animating
    this.path.getBoundingClientRect();

    var offset = this._getComputedDashOffset();
    var newOffset = this._progressToOffset(progress);

    var self = this;
    this._tweenable = new Tweenable();
    this._tweenable.tween({
        from: utils.extend({ offset: offset }, values.from),
        to: utils.extend({ offset: newOffset }, values.to),
        duration: opts.duration,
        easing: shiftyEasing,
        step: function(state) {
            self.path.style.strokeDashoffset = state.offset;
            var reference = opts.shape || self;
            opts.step(state, reference, opts.attachment);
        },
        finish: function(state) {
            if (utils.isFunction(cb)) {
                cb();
            }
        }
    });
};

Path.prototype._getComputedDashOffset = function _getComputedDashOffset() {
    var computedStyle = window.getComputedStyle(this.path, null);
    return parseFloat(computedStyle.getPropertyValue('stroke-dashoffset'), 10);
};

Path.prototype._progressToOffset = function _progressToOffset(progress) {
    var length = this.path.getTotalLength();
    return length - progress * length;
};

// Resolves from and to values for animation.
Path.prototype._resolveFromAndTo = function _resolveFromAndTo(progress, easing, opts) {
    if (opts.from && opts.to) {
        return {
            from: opts.from,
            to: opts.to
        };
    }

    return {
        from: this._calculateFrom(easing),
        to: this._calculateTo(progress, easing)
    };
};

// Calculate `from` values from options passed at initialization
Path.prototype._calculateFrom = function _calculateFrom(easing) {
    return Tweenable.interpolate(this._opts.from, this._opts.to, this.value(), easing);
};

// Calculate `to` values from options passed at initialization
Path.prototype._calculateTo = function _calculateTo(progress, easing) {
    return Tweenable.interpolate(this._opts.from, this._opts.to, progress, easing);
};

Path.prototype._stopTween = function _stopTween() {
    if (this._tweenable !== null) {
        this._tweenable.stop();
        this._tweenable = null;
    }
};

Path.prototype._easing = function _easing(easing) {
    if (EASING_ALIASES.hasOwnProperty(easing)) {
        return EASING_ALIASES[easing];
    }

    return easing;
};

module.exports = Path;

},{"./utils":8,"shifty":1}],6:[function(require,module,exports){
// Semi-SemiCircle shaped progress bar

var Shape = require('./shape');
var Circle = require('./circle');
var utils = require('./utils');

var SemiCircle = function SemiCircle(container, options) {
    // Use one arc to form a SemiCircle
    // See this answer http://stackoverflow.com/a/10477334/1446092
    this._pathTemplate =
        'M 50,50 m -{radius},0' +
        ' a {radius},{radius} 0 1 1 {2radius},0';

    this.containerAspectRatio = 2;

    Shape.apply(this, arguments);
};

SemiCircle.prototype = new Shape();
SemiCircle.prototype.constructor = SemiCircle;

SemiCircle.prototype._initializeSvg = function _initializeSvg(svg, opts) {
    svg.setAttribute('viewBox', '0 0 100 50');
};

SemiCircle.prototype._initializeTextContainer = function _initializeTextContainer(
    opts,
    container,
    textContainer
) {
    if (opts.text.style) {
        // Reset top style
        textContainer.style.top = 'auto';
        textContainer.style.bottom = '0';

        if (opts.text.alignToBottom) {
            utils.setStyle(textContainer, 'transform', 'translate(-50%, 0)');
        } else {
            utils.setStyle(textContainer, 'transform', 'translate(-50%, 50%)');
        }
    }
};

// Share functionality with Circle, just have different path
SemiCircle.prototype._pathString = Circle.prototype._pathString;
SemiCircle.prototype._trailString = Circle.prototype._trailString;

module.exports = SemiCircle;

},{"./circle":2,"./shape":7,"./utils":8}],7:[function(require,module,exports){
// Base object for different progress bar shapes

var Path = require('./path');
var utils = require('./utils');

var DESTROYED_ERROR = 'Object is destroyed';

var Shape = function Shape(container, opts) {
    // Throw a better error if progress bars are not initialized with `new`
    // keyword
    if (!(this instanceof Shape)) {
        throw new Error('Constructor was called without new keyword');
    }

    // Prevent calling constructor without parameters so inheritance
    // works correctly. To understand, this is how Shape is inherited:
    //
    //   Line.prototype = new Shape();
    //
    // We just want to set the prototype for Line.
    if (arguments.length === 0) {
        return;
    }

    // Default parameters for progress bar creation
    this._opts = utils.extend({
        color: '#555',
        strokeWidth: 1.0,
        trailColor: null,
        trailWidth: null,
        fill: null,
        text: {
            style: {
                color: null,
                position: 'absolute',
                left: '50%',
                top: '50%',
                padding: 0,
                margin: 0,
                transform: {
                    prefix: true,
                    value: 'translate(-50%, -50%)'
                }
            },
            autoStyleContainer: true,
            alignToBottom: true,
            value: null,
            className: 'progressbar-text'
        },
        svgStyle: {
            display: 'block',
            width: '100%'
        },
        warnings: false
    }, opts, true);  // Use recursive extend

    // If user specifies e.g. svgStyle or text style, the whole object
    // should replace the defaults to make working with styles easier
    if (utils.isObject(opts) && opts.svgStyle !== undefined) {
        this._opts.svgStyle = opts.svgStyle;
    }
    if (utils.isObject(opts) && utils.isObject(opts.text) && opts.text.style !== undefined) {
        this._opts.text.style = opts.text.style;
    }

    var svgView = this._createSvgView(this._opts);

    var element;
    if (utils.isString(container)) {
        element = document.querySelector(container);
    } else {
        element = container;
    }

    if (!element) {
        throw new Error('Container does not exist: ' + container);
    }

    this._container = element;
    this._container.appendChild(svgView.svg);
    if (this._opts.warnings) {
        this._warnContainerAspectRatio(this._container);
    }

    if (this._opts.svgStyle) {
        utils.setStyles(svgView.svg, this._opts.svgStyle);
    }

    // Expose public attributes before Path initialization
    this.svg = svgView.svg;
    this.path = svgView.path;
    this.trail = svgView.trail;
    this.text = null;

    var newOpts = utils.extend({
        attachment: undefined,
        shape: this
    }, this._opts);
    this._progressPath = new Path(svgView.path, newOpts);

    if (utils.isObject(this._opts.text) && this._opts.text.value !== null) {
        this.setText(this._opts.text.value);
    }
};

Shape.prototype.animate = function animate(progress, opts, cb) {
    if (this._progressPath === null) {
        throw new Error(DESTROYED_ERROR);
    }

    this._progressPath.animate(progress, opts, cb);
};

Shape.prototype.stop = function stop() {
    if (this._progressPath === null) {
        throw new Error(DESTROYED_ERROR);
    }

    // Don't crash if stop is called inside step function
    if (this._progressPath === undefined) {
        return;
    }

    this._progressPath.stop();
};

Shape.prototype.destroy = function destroy() {
    if (this._progressPath === null) {
        throw new Error(DESTROYED_ERROR);
    }

    this.stop();
    this.svg.parentNode.removeChild(this.svg);
    this.svg = null;
    this.path = null;
    this.trail = null;
    this._progressPath = null;

    if (this.text !== null) {
        this.text.parentNode.removeChild(this.text);
        this.text = null;
    }
};

Shape.prototype.set = function set(progress) {
    if (this._progressPath === null) {
        throw new Error(DESTROYED_ERROR);
    }

    this._progressPath.set(progress);
};

Shape.prototype.value = function value() {
    if (this._progressPath === null) {
        throw new Error(DESTROYED_ERROR);
    }

    if (this._progressPath === undefined) {
        return 0;
    }

    return this._progressPath.value();
};

Shape.prototype.setText = function setText(newText) {
    if (this._progressPath === null) {
        throw new Error(DESTROYED_ERROR);
    }

    if (this.text === null) {
        // Create new text node
        this.text = this._createTextContainer(this._opts, this._container);
        this._container.appendChild(this.text);
    }

    // Remove previous text and add new
    if (utils.isObject(newText)) {
        utils.removeChildren(this.text);
        this.text.appendChild(newText);
    } else {
        this.text.innerHTML = newText;
    }
};

Shape.prototype._createSvgView = function _createSvgView(opts) {
    var svg = document.createElementNS('http://www.w3.org/2000/svg', 'svg');
    this._initializeSvg(svg, opts);

    var trailPath = null;
    // Each option listed in the if condition are 'triggers' for creating
    // the trail path
    if (opts.trailColor || opts.trailWidth) {
        trailPath = this._createTrail(opts);
        svg.appendChild(trailPath);
    }

    var path = this._createPath(opts);
    svg.appendChild(path);

    return {
        svg: svg,
        path: path,
        trail: trailPath
    };
};

Shape.prototype._initializeSvg = function _initializeSvg(svg, opts) {
    svg.setAttribute('viewBox', '0 0 100 100');
};

Shape.prototype._createPath = function _createPath(opts) {
    var pathString = this._pathString(opts);
    return this._createPathElement(pathString, opts);
};

Shape.prototype._createTrail = function _createTrail(opts) {
    // Create path string with original passed options
    var pathString = this._trailString(opts);

    // Prevent modifying original
    var newOpts = utils.extend({}, opts);

    // Defaults for parameters which modify trail path
    if (!newOpts.trailColor) {
        newOpts.trailColor = '#eee';
    }
    if (!newOpts.trailWidth) {
        newOpts.trailWidth = newOpts.strokeWidth;
    }

    newOpts.color = newOpts.trailColor;
    newOpts.strokeWidth = newOpts.trailWidth;

    // When trail path is set, fill must be set for it instead of the
    // actual path to prevent trail stroke from clipping
    newOpts.fill = null;

    return this._createPathElement(pathString, newOpts);
};

Shape.prototype._createPathElement = function _createPathElement(pathString, opts) {
    var path = document.createElementNS('http://www.w3.org/2000/svg', 'path');
    path.setAttribute('d', pathString);
    path.setAttribute('stroke', opts.color);
    path.setAttribute('stroke-width', opts.strokeWidth);

    if (opts.fill) {
        path.setAttribute('fill', opts.fill);
    } else {
        path.setAttribute('fill-opacity', '0');
    }

    return path;
};

Shape.prototype._createTextContainer = function _createTextContainer(opts, container) {
    var textContainer = document.createElement('div');
    textContainer.className = opts.text.className;

    var textStyle = opts.text.style;
    if (textStyle) {
        if (opts.text.autoStyleContainer) {
            container.style.position = 'relative';
        }

        utils.setStyles(textContainer, textStyle);
        // Default text color to progress bar's color
        if (!textStyle.color) {
            textContainer.style.color = opts.color;
        }
    }

    this._initializeTextContainer(opts, container, textContainer);
    return textContainer;
};

// Give custom shapes possibility to modify text element
Shape.prototype._initializeTextContainer = function(opts, container, element) {
    // By default, no-op
    // Custom shapes should respect API options, such as text.style
};

Shape.prototype._pathString = function _pathString(opts) {
    throw new Error('Override this function for each progress bar');
};

Shape.prototype._trailString = function _trailString(opts) {
    throw new Error('Override this function for each progress bar');
};

Shape.prototype._warnContainerAspectRatio = function _warnContainerAspectRatio(container) {
    if (!this.containerAspectRatio) {
        return;
    }

    var computedStyle = window.getComputedStyle(container, null);
    var width = parseFloat(computedStyle.getPropertyValue('width'), 10);
    var height = parseFloat(computedStyle.getPropertyValue('height'), 10);
    if (!utils.floatEquals(this.containerAspectRatio, width / height)) {
        console.warn(
            'Incorrect aspect ratio of container',
            '#' + container.id,
            'detected:',
            computedStyle.getPropertyValue('width') + '(width)',
            '/',
            computedStyle.getPropertyValue('height') + '(height)',
            '=',
            width / height
        );

        console.warn(
            'Aspect ratio of should be',
            this.containerAspectRatio
        );
    }
};

module.exports = Shape;

},{"./path":5,"./utils":8}],8:[function(require,module,exports){
// Utility functions

var PREFIXES = 'Webkit Moz O ms'.split(' ');
var FLOAT_COMPARISON_EPSILON = 0.001;

// Copy all attributes from source object to destination object.
// destination object is mutated.
function extend(destination, source, recursive) {
    destination = destination || {};
    source = source || {};
    recursive = recursive || false;

    for (var attrName in source) {
        if (source.hasOwnProperty(attrName)) {
            var destVal = destination[attrName];
            var sourceVal = source[attrName];
            if (recursive && isObject(destVal) && isObject(sourceVal)) {
                destination[attrName] = extend(destVal, sourceVal, recursive);
            } else {
                destination[attrName] = sourceVal;
            }
        }
    }

    return destination;
}

// Renders templates with given variables. Variables must be surrounded with
// braces without any spaces, e.g. {variable}
// All instances of variable placeholders will be replaced with given content
// Example:
// render('Hello, {message}!', {message: 'world'})
function render(template, vars) {
    var rendered = template;

    for (var key in vars) {
        if (vars.hasOwnProperty(key)) {
            var val = vars[key];
            var regExpString = '\\{' + key + '\\}';
            var regExp = new RegExp(regExpString, 'g');

            rendered = rendered.replace(regExp, val);
        }
    }

    return rendered;
}

function setStyle(element, style, value) {
    var elStyle = element.style;  // cache for performance

    for (var i = 0; i < PREFIXES.length; ++i) {
        var prefix = PREFIXES[i];
        elStyle[prefix + capitalize(style)] = value;
    }

    elStyle[style] = value;
}

function setStyles(element, styles) {
    forEachObject(styles, function(styleValue, styleName) {
        // Allow disabling some individual styles by setting them
        // to null or undefined
        if (styleValue === null || styleValue === undefined) {
            return;
        }

        // If style's value is {prefix: true, value: '50%'},
        // Set also browser prefixed styles
        if (isObject(styleValue) && styleValue.prefix === true) {
            setStyle(element, styleName, styleValue.value);
        } else {
            element.style[styleName] = styleValue;
        }
    });
}

function capitalize(text) {
    return text.charAt(0).toUpperCase() + text.slice(1);
}

function isString(obj) {
    return typeof obj === 'string' || obj instanceof String;
}

function isFunction(obj) {
    return typeof obj === 'function';
}

function isArray(obj) {
    return Object.prototype.toString.call(obj) === '[object Array]';
}

// Returns true if `obj` is object as in {a: 1, b: 2}, not if it's function or
// array
function isObject(obj) {
    if (isArray(obj)) {
        return false;
    }

    var type = typeof obj;
    return type === 'object' && !!obj;
}

function forEachObject(object, callback) {
    for (var key in object) {
        if (object.hasOwnProperty(key)) {
            var val = object[key];
            callback(val, key);
        }
    }
}

function floatEquals(a, b) {
    return Math.abs(a - b) < FLOAT_COMPARISON_EPSILON;
}

// https://coderwall.com/p/nygghw/don-t-use-innerhtml-to-empty-dom-elements
function removeChildren(el) {
    while (el.firstChild) {
        el.removeChild(el.firstChild);
    }
}

module.exports = {
    extend: extend,
    render: render,
    setStyle: setStyle,
    setStyles: setStyles,
    capitalize: capitalize,
    isString: isString,
    isFunction: isFunction,
    isObject: isObject,
    forEachObject: forEachObject,
    floatEquals: floatEquals,
    removeChildren: removeChildren
};

},{}]},{},[4])(4)
});