Team:UC San Diego/wow-animate.js

(function() {

 var MutationObserver, Util, WeakMap, getComputedStyle, getComputedStyleRX,
   __bind = function(fn, me){ return function(){ return fn.apply(me, arguments); }; },
   __indexOf = [].indexOf || function(item) { for (var i = 0, l = this.length; i < l; i++) { if (i in this && this[i] === item) return i; } return -1; };

 Util = (function() {
   function Util() {}

   Util.prototype.extend = function(custom, defaults) {
     var key, value;
     for (key in defaults) {
       value = defaults[key];
       if (custom[key] == null) {
         custom[key] = value;
       }
     }
     return custom;
   };

   Util.prototype.isMobile = function(agent) {
     return /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(agent);
   };

   Util.prototype.addEvent = function(elem, event, fn) {
     if (elem.addEventListener != null) {
       return elem.addEventListener(event, fn, false);
     } else if (elem.attachEvent != null) {
       return elem.attachEvent("on" + event, fn);
     } else {
       return elem[event] = fn;
     }
   };

   Util.prototype.removeEvent = function(elem, event, fn) {
     if (elem.removeEventListener != null) {
       return elem.removeEventListener(event, fn, false);
     } else if (elem.detachEvent != null) {
       return elem.detachEvent("on" + event, fn);
     } else {
       return delete elem[event];
     }
   };

   Util.prototype.innerHeight = function() {
     if ('innerHeight' in window) {
       return window.innerHeight;
     } else {
       return document.documentElement.clientHeight;
     }
   };

   return Util;

 })();

 WeakMap = this.WeakMap || this.MozWeakMap || (WeakMap = (function() {
   function WeakMap() {
     this.keys = [];
     this.values = [];
   }

   WeakMap.prototype.get = function(key) {
     var i, item, _i, _len, _ref;
     _ref = this.keys;
     for (i = _i = 0, _len = _ref.length; _i < _len; i = ++_i) {
       item = _ref[i];
       if (item === key) {
         return this.values[i];
       }
     }
   };

   WeakMap.prototype.set = function(key, value) {
     var i, item, _i, _len, _ref;
     _ref = this.keys;
     for (i = _i = 0, _len = _ref.length; _i < _len; i = ++_i) {
       item = _ref[i];
       if (item === key) {
         this.values[i] = value;
         return;
       }
     }
     this.keys.push(key);
     return this.values.push(value);
   };

   return WeakMap;

 })());

 MutationObserver = this.MutationObserver || this.WebkitMutationObserver || this.MozMutationObserver || (MutationObserver = (function() {
   function MutationObserver() {
     if (typeof console !== "undefined" && console !== null) {
       console.warn('MutationObserver is not supported by your browser.');
     }
     if (typeof console !== "undefined" && console !== null) {
       console.warn('WOW.js cannot detect dom mutations, please call .sync() after loading new content.');
     }
   }

   MutationObserver.notSupported = true;

   MutationObserver.prototype.observe = function() {};

   return MutationObserver;

 })());

 getComputedStyle = this.getComputedStyle || function(el, pseudo) {
   this.getPropertyValue = function(prop) {
     var _ref;
     if (prop === 'float') {
       prop = 'styleFloat';
     }
     if (getComputedStyleRX.test(prop)) {
       prop.replace(getComputedStyleRX, function(_, _char) {
         return _char.toUpperCase();
       });
     }
     return ((_ref = el.currentStyle) != null ? _ref[prop] : void 0) || null;
   };
   return this;
 };

 getComputedStyleRX = /(\-([a-z]){1})/g;

 this.WOW = (function() {
   WOW.prototype.defaults = {
     boxClass: 'wow',
     animateClass: 'animated',
     offset: 0,
     mobile: true,
     live: true,
     callback: null
   };

   function WOW(options) {
     if (options == null) {
       options = {};
     }
     this.scrollCallback = __bind(this.scrollCallback, this);
     this.scrollHandler = __bind(this.scrollHandler, this);
     this.start = __bind(this.start, this);
     this.scrolled = true;
     this.config = this.util().extend(options, this.defaults);
     this.animationNameCache = new WeakMap();
   }

   WOW.prototype.init = function() {
     var _ref;
     this.element = window.document.documentElement;
     if ((_ref = document.readyState) === "interactive" || _ref === "complete") {
       this.start();
     } else {
       this.util().addEvent(document, 'DOMContentLoaded', this.start);
     }
     return this.finished = [];
   };

   WOW.prototype.start = function() {
     var box, _i, _len, _ref;
     this.stopped = false;
     this.boxes = (function() {
       var _i, _len, _ref, _results;
       _ref = this.element.querySelectorAll("." + this.config.boxClass);
       _results = [];
       for (_i = 0, _len = _ref.length; _i < _len; _i++) {
         box = _ref[_i];
         _results.push(box);
       }
       return _results;
     }).call(this);
     this.all = (function() {
       var _i, _len, _ref, _results;
       _ref = this.boxes;
       _results = [];
       for (_i = 0, _len = _ref.length; _i < _len; _i++) {
         box = _ref[_i];
         _results.push(box);
       }
       return _results;
     }).call(this);
     if (this.boxes.length) {
       if (this.disabled()) {
         this.resetStyle();
       } else {
         _ref = this.boxes;
         for (_i = 0, _len = _ref.length; _i < _len; _i++) {
           box = _ref[_i];
           this.applyStyle(box, true);
         }
       }
     }
     if (!this.disabled()) {
       this.util().addEvent(window, 'scroll', this.scrollHandler);
       this.util().addEvent(window, 'resize', this.scrollHandler);
       this.interval = setInterval(this.scrollCallback, 50);
     }
     if (this.config.live) {
       return new MutationObserver((function(_this) {
         return function(records) {
           var node, record, _j, _len1, _results;
           _results = [];
           for (_j = 0, _len1 = records.length; _j < _len1; _j++) {
             record = records[_j];
             _results.push((function() {
               var _k, _len2, _ref1, _results1;
               _ref1 = record.addedNodes || [];
               _results1 = [];
               for (_k = 0, _len2 = _ref1.length; _k < _len2; _k++) {
                 node = _ref1[_k];
                 _results1.push(this.doSync(node));
               }
               return _results1;
             }).call(_this));
           }
           return _results;
         };
       })(this)).observe(document.body, {
         childList: true,
         subtree: true
       });
     }
   };

   WOW.prototype.stop = function() {
     this.stopped = true;
     this.util().removeEvent(window, 'scroll', this.scrollHandler);
     this.util().removeEvent(window, 'resize', this.scrollHandler);
     if (this.interval != null) {
       return clearInterval(this.interval);
     }
   };

   WOW.prototype.sync = function(element) {
     if (MutationObserver.notSupported) {
       return this.doSync(this.element);
     }
   };

   WOW.prototype.doSync = function(element) {
     var box, _i, _len, _ref, _results;
     if (element == null) {
       element = this.element;
     }
     if (element.nodeType !== 1) {
       return;
     }
     element = element.parentNode || element;
     _ref = element.querySelectorAll("." + this.config.boxClass);
     _results = [];
     for (_i = 0, _len = _ref.length; _i < _len; _i++) {
       box = _ref[_i];
       if (__indexOf.call(this.all, box) < 0) {
         this.boxes.push(box);
         this.all.push(box);
         if (this.stopped || this.disabled()) {
           this.resetStyle();
         } else {
           this.applyStyle(box, true);
         }
         _results.push(this.scrolled = true);
       } else {
         _results.push(void 0);
       }
     }
     return _results;
   };

   WOW.prototype.show = function(box) {
     this.applyStyle(box);
     box.className = "" + box.className + " " + this.config.animateClass;
     if (this.config.callback != null) {
       return this.config.callback(box);
     }
   };

   WOW.prototype.applyStyle = function(box, hidden) {
     var delay, duration, iteration;
     duration = box.getAttribute('data-wow-duration');
     delay = box.getAttribute('data-wow-delay');
     iteration = box.getAttribute('data-wow-iteration');
     return this.animate((function(_this) {
       return function() {
         return _this.customStyle(box, hidden, duration, delay, iteration);
       };
     })(this));
   };

   WOW.prototype.animate = (function() {
     if ('requestAnimationFrame' in window) {
       return function(callback) {
         return window.requestAnimationFrame(callback);
       };
     } else {
       return function(callback) {
         return callback();
       };
     }
   })();

   WOW.prototype.resetStyle = function() {
     var box, _i, _len, _ref, _results;
     _ref = this.boxes;
     _results = [];
     for (_i = 0, _len = _ref.length; _i < _len; _i++) {
       box = _ref[_i];
       _results.push(box.style.visibility = 'visible');
     }
     return _results;
   };

   WOW.prototype.customStyle = function(box, hidden, duration, delay, iteration) {
     if (hidden) {
       this.cacheAnimationName(box);
     }
     box.style.visibility = hidden ? 'hidden' : 'visible';
     if (duration) {
       this.vendorSet(box.style, {
         animationDuration: duration
       });
     }
     if (delay) {
       this.vendorSet(box.style, {
         animationDelay: delay
       });
     }
     if (iteration) {
       this.vendorSet(box.style, {
         animationIterationCount: iteration
       });
     }
     this.vendorSet(box.style, {
       animationName: hidden ? 'none' : this.cachedAnimationName(box)
     });
     return box;
   };

   WOW.prototype.vendors = ["moz", "webkit"];

   WOW.prototype.vendorSet = function(elem, properties) {
     var name, value, vendor, _results;
     _results = [];
     for (name in properties) {
       value = properties[name];
       elem["" + name] = value;
       _results.push((function() {
         var _i, _len, _ref, _results1;
         _ref = this.vendors;
         _results1 = [];
         for (_i = 0, _len = _ref.length; _i < _len; _i++) {
           vendor = _ref[_i];
           _results1.push(elem["" + vendor + (name.charAt(0).toUpperCase()) + (name.substr(1))] = value);
         }
         return _results1;
       }).call(this));
     }
     return _results;
   };

   WOW.prototype.vendorCSS = function(elem, property) {
     var result, style, vendor, _i, _len, _ref;
     style = getComputedStyle(elem);
     result = style.getPropertyCSSValue(property);
     _ref = this.vendors;
     for (_i = 0, _len = _ref.length; _i < _len; _i++) {
       vendor = _ref[_i];
       result = result || style.getPropertyCSSValue("-" + vendor + "-" + property);
     }
     return result;
   };

   WOW.prototype.animationName = function(box) {
     var animationName;
     try {
       animationName = this.vendorCSS(box, 'animation-name').cssText;
     } catch (_error) {
       animationName = getComputedStyle(box).getPropertyValue('animation-name');
     }
     if (animationName === 'none') {
       return ;
     } else {
       return animationName;
     }
   };

   WOW.prototype.cacheAnimationName = function(box) {
     return this.animationNameCache.set(box, this.animationName(box));
   };

   WOW.prototype.cachedAnimationName = function(box) {
     return this.animationNameCache.get(box);
   };

   WOW.prototype.scrollHandler = function() {
     return this.scrolled = true;
   };

   WOW.prototype.scrollCallback = function() {
     var box;
     if (this.scrolled) {
       this.scrolled = false;
       this.boxes = (function() {
         var _i, _len, _ref, _results;
         _ref = this.boxes;
         _results = [];
         for (_i = 0, _len = _ref.length; _i < _len; _i++) {
           box = _ref[_i];
           if (!(box)) {
             continue;
           }
           if (this.isVisible(box)) {
             this.show(box);
             continue;
           }
           _results.push(box);
         }
         return _results;
       }).call(this);
       if (!(this.boxes.length || this.config.live)) {
         return this.stop();
       }
     }
   };

   WOW.prototype.offsetTop = function(element) {
     var top;
     while (element.offsetTop === void 0) {
       element = element.parentNode;
     }
     top = element.offsetTop;
     while (element = element.offsetParent) {
       top += element.offsetTop;
     }
     return top;
   };

   WOW.prototype.isVisible = function(box) {
     var bottom, offset, top, viewBottom, viewTop;
     offset = box.getAttribute('data-wow-offset') || this.config.offset;
     viewTop = window.pageYOffset;
     viewBottom = viewTop + Math.min(this.element.clientHeight, this.util().innerHeight()) - offset;
     top = this.offsetTop(box);
     bottom = top + box.clientHeight;
     return top <= viewBottom && bottom >= viewTop;
   };

   WOW.prototype.util = function() {
     return this._util != null ? this._util : this._util = new Util();
   };

   WOW.prototype.disabled = function() {
     return !this.config.mobile && this.util().isMobile(navigator.userAgent);
   };

   return WOW;

 })();

}).call(this);