Team:CityU HK/Template/js

<script>

/*

*
* jqTransform
* by mathieu vilaplana mvilaplana@dfc-e.com
* Designer ghyslain armand garmand@dfc-e.com
*
*
* Version 1.0 25.09.08
* Version 1.1 06.08.09
* Add event click on Checkbox and Radio
* Auto calculate the size of a select element
* Can now, disabled the elements
* Correct bug in ff if click on select (overflow=hidden)
* No need any more preloading !!
* 
******************************************** */

function($){ var defaultOptions = {preloadImg:true}; var jqTransformImgPreloaded = false;

var jqTransformPreloadHoverFocusImg = function(strImgUrl) { //guillemets to remove for ie strImgUrl = strImgUrl.replace(/^url\((.*)\)/,'$1').replace(/^\"(.*)\"$/,'$1'); var imgHover = new Image(); imgHover.src = strImgUrl.replace(/\.([a-zA-Z]*)$/,'-hover.$1'); var imgFocus = new Image(); imgFocus.src = strImgUrl.replace(/\.([a-zA-Z]*)$/,'-focus.$1'); };

/*************************** Labels ***************************/ var jqTransformGetLabel = function(objfield){ var selfForm = $(objfield.get(0).form); var oLabel = objfield.next(); if(!oLabel.is('label')) { oLabel = objfield.prev(); if(oLabel.is('label')){ var inputname = objfield.attr('id'); if(inputname){ oLabel = selfForm.find('label[for="'+inputname+'"]'); } } } if(oLabel.is('label')){return oLabel.css('cursor','pointer');} return false; };

/* Hide all open selects */ var jqTransformHideSelect = function(oTarget){ var ulVisible = $('.jqTransformSelectWrapper ul:visible'); ulVisible.each(function(){ var oSelect = $(this).parents(".jqTransformSelectWrapper:first").find("select").get(0); //do not hide if click on the label object associated to the select if( !(oTarget && oSelect.oLabel && oSelect.oLabel.get(0) == oTarget.get(0)) ){$(this).hide();} }); }; /* Check for an external click */ var jqTransformCheckExternalClick = function(event) { if ($(event.target).parents('.jqTransformSelectWrapper').length === 0) { jqTransformHideSelect($(event.target)); } };

/* Apply document listener */ var jqTransformAddDocumentListener = function (){ $(document).mousedown(jqTransformCheckExternalClick); };

/* Add a new handler for the reset action */ var jqTransformReset = function(f){ var sel; $('.jqTransformSelectWrapper select', f).each(function(){sel = (this.selectedIndex<0) ? 0 : this.selectedIndex; $('ul', $(this).parent()).each(function(){$('a:eq('+ sel +')', this).click();});}); $('a.jqTransformCheckbox, a.jqTransformRadio', f).removeClass('jqTransformChecked'); $('input:checkbox, input:radio', f).each(function(){if(this.checked){$('a', $(this).parent()).addClass('jqTransformChecked');}}); };

/*************************** Buttons ***************************/ $.fn.jqTransInputButton = function(){ return this.each(function(){ var newBtn = $('<button id="'+ this.id +'" name="'+ this.name +'" type="'+ this.type +'" class="'+ this.className +' jqTransformButton">'+ $(this).attr('value') +'') .hover(function(){newBtn.addClass('jqTransformButton_hover');},function(){newBtn.removeClass('jqTransformButton_hover')}) .mousedown(function(){newBtn.addClass('jqTransformButton_click')}) .mouseup(function(){newBtn.removeClass('jqTransformButton_click')}) ; $(this).replaceWith(newBtn); }); };

/*************************** Text Fields ***************************/ $.fn.jqTransInputText = function(){ return this.each(function(){ var $input = $(this);

if($input.hasClass('jqtranformdone') || !$input.is('input')) {return;} $input.addClass('jqtranformdone');

var oLabel = jqTransformGetLabel($(this)); oLabel && oLabel.bind('click',function(){$input.focus();});

var inputSize=$input.width(); if($input.attr('size')){ inputSize = $input.attr('size')*10; $input.css('width',inputSize); }

$input.addClass("jqTransformInput").wrap('

');

var $wrapper = $input.parent().parent().parent(); $wrapper.css("width", inputSize+10); $input .focus(function(){$wrapper.addClass("jqTransformInputWrapper_focus");}) .blur(function(){$wrapper.removeClass("jqTransformInputWrapper_focus");}) .hover(function(){$wrapper.addClass("jqTransformInputWrapper_hover");},function(){$wrapper.removeClass("jqTransformInputWrapper_hover");}) ;

/* If this is safari we need to add an extra class */ $.browser.safari && $wrapper.addClass('jqTransformSafari'); $.browser.safari && $input.css('width',$wrapper.width()+16); this.wrapper = $wrapper;

}); };

/*************************** Check Boxes ***************************/ $.fn.jqTransCheckBox = function(){ return this.each(function(){ if($(this).hasClass('jqTransformHidden')) {return;}

var $input = $(this); var inputSelf = this;

//set the click on the label var oLabel=jqTransformGetLabel($input); oLabel && oLabel.click(function(){aLink.trigger('click');});

var aLink = $('<a href="#" class="jqTransformCheckbox"></a>'); //wrap and add the link $input.addClass('jqTransformHidden').wrap('').parent().prepend(aLink); //on change, change the class of the link $input.change(function(){ this.checked && aLink.addClass('jqTransformChecked') || aLink.removeClass('jqTransformChecked'); return true; }); // Click Handler, trigger the click and change event on the input aLink.click(function(){ //do nothing if the original input is disabled if($input.attr('disabled')){return false;} //trigger the envents on the input object $input.trigger('click').trigger("change"); return false; });

// set the default state this.checked && aLink.addClass('jqTransformChecked'); }); }; /*************************** Radio Buttons ***************************/ $.fn.jqTransRadio = function(){ return this.each(function(){ if($(this).hasClass('jqTransformHidden')) {return;}

var $input = $(this); var inputSelf = this;

oLabel = jqTransformGetLabel($input); oLabel && oLabel.click(function(){aLink.trigger('click');});

var aLink = $('<a href="#" class="jqTransformRadio" rel="'+ this.name +'"></a>'); $input.addClass('jqTransformHidden').wrap('').parent().prepend(aLink);

$input.change(function(){ inputSelf.checked && aLink.addClass('jqTransformChecked') || aLink.removeClass('jqTransformChecked'); return true; }); // Click Handler aLink.click(function(){ if($input.attr('disabled')){return false;} $input.trigger('click').trigger('change');

// uncheck all others of same name input radio elements $('input[name="'+$input.attr('name')+'"]',inputSelf.form).not($input).each(function(){ $(this).attr('type')=='radio' && $(this).trigger('change'); });

return false; }); // set the default state inputSelf.checked && aLink.addClass('jqTransformChecked'); }); };

/*************************** TextArea ***************************/ $.fn.jqTransTextarea = function(){ return this.each(function(){ var textarea = $(this);

if(textarea.hasClass('jqtransformdone')) {return;} textarea.addClass('jqtransformdone');

oLabel = jqTransformGetLabel(textarea); oLabel && oLabel.click(function(){textarea.focus();});

var strTable = ''; strTable +=''; strTable +=''; strTable +=''; strTable +='';

var oTable = $(strTable) .insertAfter(textarea) .hover(function(){ !oTable.hasClass('jqTransformTextarea-focus') && oTable.addClass('jqTransformTextarea-hover'); },function(){ oTable.removeClass('jqTransformTextarea-hover'); }) ;

textarea .focus(function(){oTable.removeClass('jqTransformTextarea-hover').addClass('jqTransformTextarea-focus');}) .blur(function(){oTable.removeClass('jqTransformTextarea-focus');}) .appendTo($('#jqTransformTextarea-mm div',oTable)) ; this.oTable = oTable; if($.browser.safari){ $('#jqTransformTextarea-mm',oTable) .addClass('jqTransformSafariTextarea') .find('div') .css('height',textarea.height()) .css('width',textarea.width()) ; } }); };

/*************************** Select ***************************/ $.fn.jqTransSelect = function(){ return this.each(function(index){ var $select = $(this);

if($select.hasClass('jqTransformHidden')) {return;} if($select.attr('multiple')) {return;}

var oLabel = jqTransformGetLabel($select); /* First thing we do is Wrap it */ var $wrapper = $select .addClass('jqTransformHidden')

.wrap('

')

.parent() .css({zIndex: 10-index}) ;

/* Now add the html for the select */

$wrapper.prepend('

<a href="#" class="jqTransformSelectOpen"></a>

');

var $ul = $('ul', $wrapper).css('width',$select.width()).hide(); /* Now we add the options */ $('option', this).each(function(i){

var oLi = $('

<a href="#" index="'+ i +'">'+ $(this).html() +'</a>

');

$ul.append(oLi); });

/* Add click handler to the a */ $ul.find('a').click(function(){ $('a.selected', $wrapper).removeClass('selected'); $(this).addClass('selected'); /* Fire the onchange event */ if ($select[0].selectedIndex != $(this).attr('index') && $select[0].onchange) { $select[0].selectedIndex = $(this).attr('index'); $select[0].onchange(); } $select[0].selectedIndex = $(this).attr('index'); $('span:eq(0)', $wrapper).html($(this).html()); $ul.hide(); return false; }); /* Set the default */ $('a:eq('+ this.selectedIndex +')', $ul).click(); $('span:first', $wrapper).click(function(){$("a.jqTransformSelectOpen",$wrapper).trigger('click');}); oLabel && oLabel.click(function(){$("a.jqTransformSelectOpen",$wrapper).trigger('click');}); this.oLabel = oLabel;

/* Apply the click handler to the Open */ var oLinkOpen = $('a.jqTransformSelectOpen', $wrapper) .click(function(){ //Check if box is already open to still allow toggle, but close all other selects if( $ul.css('display') == 'none' ) {jqTransformHideSelect();} if($select.attr('disabled')){return false;}

$ul.slideToggle('fast', function(){ var offSet = ($('a.selected', $ul).offset().top - $ul.offset().top); $ul.animate({scrollTop: offSet}); }); return false; }) ;

// Set the new width var iSelectWidth = $select.outerWidth(); var oSpan = $('span:first',$wrapper); var newWidth = (iSelectWidth > oSpan.innerWidth())?iSelectWidth+oLinkOpen.outerWidth():$wrapper.width(); $wrapper.css('width',newWidth); $ul.css('width',newWidth-2); oSpan.css({width:iSelectWidth});

// Calculate the height if necessary, less elements that the default height //show the ul to calculate the block, if ul is not displayed li height value is 0 $ul.css({display:'block',visibility:'hidden'}); var iSelectHeight = ($('li',$ul).length)*($('li:first',$ul).height());//+1 else bug ff (iSelectHeight < $ul.height()) && $ul.css({height:iSelectHeight,'overflow':'hidden'});//hidden else bug with ff $ul.css({display:'none',visibility:'visible'});

}); }; $.fn.jqTransform = function(options){ var opt = $.extend({},defaultOptions,options);

/* each form */ return this.each(function(){ var selfForm = $(this); if(selfForm.hasClass('jqtransformdone')) {return;} selfForm.addClass('jqtransformdone');

$('input:submit, input:reset, input[type="button"]', this).jqTransInputButton(); $('input:text, input:password', this).jqTransInputText(); $('input:checkbox', this).jqTransCheckBox(); $('input:radio', this).jqTransRadio(); $('textarea', this).jqTransTextarea();

if( $('select', this).jqTransSelect().length > 0 ){jqTransformAddDocumentListener();} selfForm.bind('reset',function(){var action = function(){jqTransformReset(this);}; window.setTimeout(action, 10);});

//preloading dont needed anymore since normal, focus and hover image are the same one /*if(opt.preloadImg && !jqTransformImgPreloaded){ jqTransformImgPreloaded = true; var oInputText = $('input:text:first', selfForm); if(oInputText.length > 0){ //pour ie on eleve les "" var strWrapperImgUrl = oInputText.get(0).wrapper.css('background-image'); jqTransformPreloadHoverFocusImg(strWrapperImgUrl); var strInnerImgUrl = $('div.jqTransformInputInner',$(oInputText.get(0).wrapper)).css('background-image'); jqTransformPreloadHoverFocusImg(strInnerImgUrl); }

var oTextarea = $('textarea',selfForm); if(oTextarea.length > 0){ var oTable = oTextarea.get(0).oTable; $('td',oTable).each(function(){ var strImgBack = $(this).css('background-image'); jqTransformPreloadHoverFocusImg(strImgBack); }); } }*/

}); /* End Form each */

};/* End the Plugin */

}

/***********************************

      jQuery

• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • /

jQuery(function($) {

 // Mobile sidebars
 $.fn.expandableSidebar = function(expandedClass) {
   var $me = this;

   $me.on('click', function() {
     if(!$me.hasClass(expandedClass)) {
       $me.addClass(expandedClass);
     } else {
       $me.removeClass(expandedClass);
     }
   });
 }
 
 // Interval loop
 $.fn.intervalLoop = function(condition, action, duration, limit) {
   var counter = 0;
   var looper = setInterval(function(){
     if (counter >= limit || $.fn.checkIfElementExists(condition)) {
       clearInterval(looper);
     } else {
       action();
       counter++;
     }
   }, duration);
 }

 // Check if element exists
 $.fn.checkIfElementExists = function(selector) {
   return $(selector).length;
 }

 var parisController = {

   init: function(opts) {
     var base = this;

     // Add classes to elements
     base._addClasses();

     setTimeout(function(){
       base._checkCartItems();
       base._attachEvents();
     }, 1000);
   },

   _addClasses: function() {
     var base = this;

     // Add fade in class to nav + logo
     $('.landing-page').addClass('fade-in');

     // Add class to nav items with subnav
     $('.wsite-menu-default').find('li.wsite-menu-item-wrap').each(function(){
       var $me = $(this);

       if($me.children('.wsite-menu-wrap').length > 0) {

         $me.addClass('has-submenu');
         $('').insertAfter($me.children('a.wsite-menu-item'));
       }
     });

     // ADd class to subnav items with subnav
     $('.wsite-menu').find('li.wsite-menu-subitem-wrap').each(function(){
       var $me = $(this);

       if($me.children('.wsite-menu-wrap').length > 0) {

         $me.addClass('has-submenu');
         $('').insertAfter($me.children('a.wsite-menu-subitem'));
       }
     });

     // Keep subnav open if submenu item is active
     $('.wsite-menu-wrap').find('li.wsite-menu-subitem-wrap').each(function(){
       var $me = $(this);

       if($me.hasClass('wsite-nav-current')) {
         $me.parents().addClass('open');
       }
     });

     // Add placeholder text to inputs
     $('.wsite-form-sublabel').each(function(){
       var sublabel = $(this).text();
       $(this).prev('.wsite-form-input').attr('placeholder', sublabel);
     });

     // Add fullwidth class to gallery thumbs if less than 6
     $('.imageGallery').each(function(){
       if ($(this).children('div').length <= 6) {
         $(this).children('div').addClass('fullwidth-mobile');
       }
     });
   },

   _checkCartItems: function() {
     var base = this;
     
     if($('#wsite-mini-cart').find('li.wsite-product-item').length > 0) {
       $('body').addClass('cart-full');
     } else {
       $('body').removeClass('cart-full');
     }
   },

   _moveLogin: function() {
     var loginDetach = $('#member-login').detach();
     $('.mobile-nav .wsite-menu-default li:last-child').after(loginDetach);
   },

   _attachEvents: function() {
     var base = this;

     // Move cart + login
     if ($(window).width() <= 992) {
       $.fn.intervalLoop('.mobile-nav #member-login', base._moveLogin, 800, 5);
     }

     // Subnav toggle
     $('li.has-submenu').each(function(){
       var $me = $(this);
       var caret = $me.children('span.icon-caret');

       caret.on('click', function(){          
         if($me.children('.wsite-menu-wrap.open').length > 0) {
           caret.siblings('.wsite-menu-wrap').removeClass('open');
         } else {
           caret.siblings('.wsite-menu-wrap').addClass('open');
         }
       });
     });

     // Scroll on landing page
     $('#contentArrow').on('click', function() {
       $('html, body').animate({
         scrollTop: $('.main-wrap').offset().top - $('.paris-header').outerHeight()
       }, 500);
     });

     // Store category dropdown
     $('.wsite-com-sidebar').expandableSidebar('sidebar-expanded');

     // Search filters dropdown
     $('#wsite-search-sidebar').expandableSidebar('sidebar-expanded');

     // Init fancybox swipe on mobile
     if ('ontouchstart' in window) {
       $('body').on('click', 'a.w-fancybox', function() {
         base._initSwipeGallery();
       });
     }
   },

   _initSwipeGallery: function() {
     var base = this;

     setTimeout(function(){
       var touchGallery = document.getElementsByClassName('fancybox-wrap')[0];
       var mc = new Hammer(touchGallery);
       mc.on("panleft panright", function(ev) {
         if (ev.type == "panleft") {
           $("a.fancybox-next").trigger("click");
         } else if (ev.type == "panright") {
           $("a.fancybox-prev").trigger("click");
         }
         base._initSwipeGallery();
       });
     }, 500);
   }
 } 

 $(document).ready(function(){
   parisController.init();
 }); 

});

/*! Hammer.JS - v2.0.4 - 2014-09-28

* http://hammerjs.github.io/
*
* Copyright (c) 2014 Jorik Tangelder;
* Licensed under the MIT license */

(function(window, document, exportName, undefined) {

 'use strict';

var VENDOR_PREFIXES = [, 'webkit', 'moz', 'MS', 'ms', 'o']; var TEST_ELEMENT = document.createElement('div');

var TYPE_FUNCTION = 'function';

var round = Math.round; var abs = Math.abs; var now = Date.now;

/**

* set a timeout with a given scope
* @param {Function} fn
* @param {Number} timeout
* @param {Object} context
* @returns {number}
*/

function setTimeoutContext(fn, timeout, context) {

   return setTimeout(bindFn(fn, context), timeout);

}

/**

* if the argument is an array, we want to execute the fn on each entry
* if it aint an array we don't want to do a thing.
* this is used by all the methods that accept a single and array argument.
* @param {*|Array} arg
* @param {String} fn
* @param {Object} [context]
* @returns {Boolean}
*/

function invokeArrayArg(arg, fn, context) {

   if (Array.isArray(arg)) {
       each(arg, context[fn], context);
       return true;
   }
   return false;

}

/**

* walk objects and arrays
* @param {Object} obj
* @param {Function} iterator
* @param {Object} context
*/

function each(obj, iterator, context) {

   var i;

   if (!obj) {
       return;
   }

   if (obj.forEach) {
       obj.forEach(iterator, context);
   } else if (obj.length !== undefined) {
       i = 0;
       while (i < obj.length) {
           iterator.call(context, obj[i], i, obj);
           i++;
       }
   } else {
       for (i in obj) {
           obj.hasOwnProperty(i) && iterator.call(context, obj[i], i, obj);
       }
   }

}

/**

* extend object.
* means that properties in dest will be overwritten by the ones in src.
* @param {Object} dest
* @param {Object} src
* @param {Boolean} [merge]
* @returns {Object} dest
*/

function extend(dest, src, merge) {

   var keys = Object.keys(src);
   var i = 0;
   while (i < keys.length) {
       if (!merge || (merge && dest[keys[i]] === undefined)) {
           dest[keys[i]] = src[keys[i]];
       }
       i++;
   }
   return dest;

}

/**

* merge the values from src in the dest.
* means that properties that exist in dest will not be overwritten by src
* @param {Object} dest
* @param {Object} src
* @returns {Object} dest
*/

function merge(dest, src) {

   return extend(dest, src, true);

}

/**

* simple class inheritance
* @param {Function} child
* @param {Function} base
* @param {Object} [properties]
*/

function inherit(child, base, properties) {

   var baseP = base.prototype,
       childP;

   childP = child.prototype = Object.create(baseP);
   childP.constructor = child;
   childP._super = baseP;

   if (properties) {
       extend(childP, properties);
   }

}

/**

* simple function bind
* @param {Function} fn
* @param {Object} context
* @returns {Function}
*/

function bindFn(fn, context) {

   return function boundFn() {
       return fn.apply(context, arguments);
   };

}

/**

* let a boolean value also be a function that must return a boolean
* this first item in args will be used as the context
* @param {Boolean|Function} val
* @param {Array} [args]
* @returns {Boolean}
*/

function boolOrFn(val, args) {

   if (typeof val == TYPE_FUNCTION) {
       return val.apply(args ? args[0] || undefined : undefined, args);
   }
   return val;

}

/**

* use the val2 when val1 is undefined
* @param {*} val1
* @param {*} val2
* @returns {*}
*/

function ifUndefined(val1, val2) {

   return (val1 === undefined) ? val2 : val1;

}

/**

* addEventListener with multiple events at once
* @param {EventTarget} target
* @param {String} types
* @param {Function} handler
*/

function addEventListeners(target, types, handler) {

   each(splitStr(types), function(type) {
       target.addEventListener(type, handler, false);
   });

}

/**

* removeEventListener with multiple events at once
* @param {EventTarget} target
* @param {String} types
* @param {Function} handler
*/

function removeEventListeners(target, types, handler) {

   each(splitStr(types), function(type) {
       target.removeEventListener(type, handler, false);
   });

}

/**

* find if a node is in the given parent
* @method hasParent
* @param {HTMLElement} node
* @param {HTMLElement} parent
* @return {Boolean} found
*/

function hasParent(node, parent) {

   while (node) {
       if (node == parent) {
           return true;
       }
       node = node.parentNode;
   }
   return false;

}

/**

* small indexOf wrapper
* @param {String} str
* @param {String} find
* @returns {Boolean} found
*/

function inStr(str, find) {

   return str.indexOf(find) > -1;

}

/**

* split string on whitespace
* @param {String} str
* @returns {Array} words
*/

function splitStr(str) {

   return str.trim().split(/\s+/g);

}

/**

* find if a array contains the object using indexOf or a simple polyFill
* @param {Array} src
* @param {String} find
* @param {String} [findByKey]
* @return {Boolean|Number} false when not found, or the index
*/

function inArray(src, find, findByKey) {

   if (src.indexOf && !findByKey) {
       return src.indexOf(find);
   } else {
       var i = 0;
       while (i < src.length) {
           if ((findByKey && src[i][findByKey] == find) || (!findByKey && src[i] === find)) {
               return i;
           }
           i++;
       }
       return -1;
   }

}

/**

* convert array-like objects to real arrays
* @param {Object} obj
* @returns {Array}
*/

function toArray(obj) {

   return Array.prototype.slice.call(obj, 0);

}

/**

* unique array with objects based on a key (like 'id') or just by the array's value
* @param {Array} src [{id:1},{id:2},{id:1}]
* @param {String} [key]
* @param {Boolean} [sort=False]
* @returns {Array} [{id:1},{id:2}]
*/

function uniqueArray(src, key, sort) {

   var results = [];
   var values = [];
   var i = 0;

   while (i < src.length) {
       var val = key ? src[i][key] : src[i];
       if (inArray(values, val) < 0) {
           results.push(src[i]);
       }
       values[i] = val;
       i++;
   }

   if (sort) {
       if (!key) {
           results = results.sort();
       } else {
           results = results.sort(function sortUniqueArray(a, b) {
               return a[key] > b[key];
           });
       }
   }

   return results;

}

/**

* get the prefixed property
* @param {Object} obj
* @param {String} property
* @returns {String|Undefined} prefixed
*/

function prefixed(obj, property) {

   var prefix, prop;
   var camelProp = property[0].toUpperCase() + property.slice(1);

   var i = 0;
   while (i < VENDOR_PREFIXES.length) {
       prefix = VENDOR_PREFIXES[i];
       prop = (prefix) ? prefix + camelProp : property;

       if (prop in obj) {
           return prop;
       }
       i++;
   }
   return undefined;

}

/**

* get a unique id
* @returns {number} uniqueId
*/

var _uniqueId = 1; function uniqueId() {

   return _uniqueId++;

}

/**

* get the window object of an element
* @param {HTMLElement} element
* @returns {DocumentView|Window}
*/

function getWindowForElement(element) {

   var doc = element.ownerDocument;
   return (doc.defaultView || doc.parentWindow);

}

var MOBILE_REGEX = /mobile|tablet|ip(ad|hone|od)|android/i;

var SUPPORT_TOUCH = ('ontouchstart' in window); var SUPPORT_POINTER_EVENTS = prefixed(window, 'PointerEvent') !== undefined; var SUPPORT_ONLY_TOUCH = SUPPORT_TOUCH && MOBILE_REGEX.test(navigator.userAgent);

var INPUT_TYPE_TOUCH = 'touch'; var INPUT_TYPE_PEN = 'pen'; var INPUT_TYPE_MOUSE = 'mouse'; var INPUT_TYPE_KINECT = 'kinect';

var COMPUTE_INTERVAL = 25;

var INPUT_START = 1; var INPUT_MOVE = 2; var INPUT_END = 4; var INPUT_CANCEL = 8;

var DIRECTION_NONE = 1; var DIRECTION_LEFT = 2; var DIRECTION_RIGHT = 4; var DIRECTION_UP = 8; var DIRECTION_DOWN = 16;

var DIRECTION_HORIZONTAL = DIRECTION_LEFT | DIRECTION_RIGHT; var DIRECTION_VERTICAL = DIRECTION_UP | DIRECTION_DOWN; var DIRECTION_ALL = DIRECTION_HORIZONTAL | DIRECTION_VERTICAL;

var PROPS_XY = ['x', 'y']; var PROPS_CLIENT_XY = ['clientX', 'clientY'];

/**

* create new input type manager
* @param {Manager} manager
* @param {Function} callback
* @returns {Input}
* @constructor
*/

function Input(manager, callback) {

   var self = this;
   this.manager = manager;
   this.callback = callback;
   this.element = manager.element;
   this.target = manager.options.inputTarget;

   // smaller wrapper around the handler, for the scope and the enabled state of the manager,
   // so when disabled the input events are completely bypassed.
   this.domHandler = function(ev) {
       if (boolOrFn(manager.options.enable, [manager])) {
           self.handler(ev);
       }
   };

   this.init();

}

Input.prototype = {

   /**
    * should handle the inputEvent data and trigger the callback
    * @virtual
    */
   handler: function() { },

   /**
    * bind the events
    */
   init: function() {
       this.evEl && addEventListeners(this.element, this.evEl, this.domHandler);
       this.evTarget && addEventListeners(this.target, this.evTarget, this.domHandler);
       this.evWin && addEventListeners(getWindowForElement(this.element), this.evWin, this.domHandler);
   },

   /**
    * unbind the events
    */
   destroy: function() {
       this.evEl && removeEventListeners(this.element, this.evEl, this.domHandler);
       this.evTarget && removeEventListeners(this.target, this.evTarget, this.domHandler);
       this.evWin && removeEventListeners(getWindowForElement(this.element), this.evWin, this.domHandler);
   }

};

/**

* create new input type manager
* called by the Manager constructor
* @param {Hammer} manager
* @returns {Input}
*/

function createInputInstance(manager) {

   var Type;
   var inputClass = manager.options.inputClass;

   if (inputClass) {
       Type = inputClass;
   } else if (SUPPORT_POINTER_EVENTS) {
       Type = PointerEventInput;
   } else if (SUPPORT_ONLY_TOUCH) {
       Type = TouchInput;
   } else if (!SUPPORT_TOUCH) {
       Type = MouseInput;
   } else {
       Type = TouchMouseInput;
   }
   return new (Type)(manager, inputHandler);

}

/**

* handle input events
* @param {Manager} manager
* @param {String} eventType
* @param {Object} input
*/

function inputHandler(manager, eventType, input) {

   var pointersLen = input.pointers.length;
   var changedPointersLen = input.changedPointers.length;
   var isFirst = (eventType & INPUT_START && (pointersLen - changedPointersLen === 0));
   var isFinal = (eventType & (INPUT_END | INPUT_CANCEL) && (pointersLen - changedPointersLen === 0));

   input.isFirst = !!isFirst;
   input.isFinal = !!isFinal;

   if (isFirst) {
       manager.session = {};
   }

   // source event is the normalized value of the domEvents
   // like 'touchstart, mouseup, pointerdown'
   input.eventType = eventType;

   // compute scale, rotation etc
   computeInputData(manager, input);

   // emit secret event
   manager.emit('hammer.input', input);

   manager.recognize(input);
   manager.session.prevInput = input;

}

/**

* extend the data with some usable properties like scale, rotate, velocity etc
* @param {Object} manager
* @param {Object} input
*/

function computeInputData(manager, input) {

   var session = manager.session;
   var pointers = input.pointers;
   var pointersLength = pointers.length;

   // store the first input to calculate the distance and direction
   if (!session.firstInput) {
       session.firstInput = simpleCloneInputData(input);
   }

   // to compute scale and rotation we need to store the multiple touches
   if (pointersLength > 1 && !session.firstMultiple) {
       session.firstMultiple = simpleCloneInputData(input);
   } else if (pointersLength === 1) {
       session.firstMultiple = false;
   }

   var firstInput = session.firstInput;
   var firstMultiple = session.firstMultiple;
   var offsetCenter = firstMultiple ? firstMultiple.center : firstInput.center;

   var center = input.center = getCenter(pointers);
   input.timeStamp = now();
   input.deltaTime = input.timeStamp - firstInput.timeStamp;

   input.angle = getAngle(offsetCenter, center);
   input.distance = getDistance(offsetCenter, center);

   computeDeltaXY(session, input);
   input.offsetDirection = getDirection(input.deltaX, input.deltaY);

   input.scale = firstMultiple ? getScale(firstMultiple.pointers, pointers) : 1;
   input.rotation = firstMultiple ? getRotation(firstMultiple.pointers, pointers) : 0;

   computeIntervalInputData(session, input);

   // find the correct target
   var target = manager.element;
   if (hasParent(input.srcEvent.target, target)) {
       target = input.srcEvent.target;
   }
   input.target = target;

}

function computeDeltaXY(session, input) {

   var center = input.center;
   var offset = session.offsetDelta || {};
   var prevDelta = session.prevDelta || {};
   var prevInput = session.prevInput || {};

   if (input.eventType === INPUT_START || prevInput.eventType === INPUT_END) {
       prevDelta = session.prevDelta = {
           x: prevInput.deltaX || 0,
           y: prevInput.deltaY || 0
       };

       offset = session.offsetDelta = {
           x: center.x,
           y: center.y
       };
   }

   input.deltaX = prevDelta.x + (center.x - offset.x);
   input.deltaY = prevDelta.y + (center.y - offset.y);

}

/**

* velocity is calculated every x ms
* @param {Object} session
* @param {Object} input
*/

function computeIntervalInputData(session, input) {

   var last = session.lastInterval || input,
       deltaTime = input.timeStamp - last.timeStamp,
       velocity, velocityX, velocityY, direction;

   if (input.eventType != INPUT_CANCEL && (deltaTime > COMPUTE_INTERVAL || last.velocity === undefined)) {
       var deltaX = last.deltaX - input.deltaX;
       var deltaY = last.deltaY - input.deltaY;

       var v = getVelocity(deltaTime, deltaX, deltaY);
       velocityX = v.x;
       velocityY = v.y;
       velocity = (abs(v.x) > abs(v.y)) ? v.x : v.y;
       direction = getDirection(deltaX, deltaY);

       session.lastInterval = input;
   } else {
       // use latest velocity info if it doesn't overtake a minimum period
       velocity = last.velocity;
       velocityX = last.velocityX;
       velocityY = last.velocityY;
       direction = last.direction;
   }

   input.velocity = velocity;
   input.velocityX = velocityX;
   input.velocityY = velocityY;
   input.direction = direction;

}

/**

* create a simple clone from the input used for storage of firstInput and firstMultiple
* @param {Object} input
* @returns {Object} clonedInputData
*/

function simpleCloneInputData(input) {

   // make a simple copy of the pointers because we will get a reference if we don't
   // we only need clientXY for the calculations
   var pointers = [];
   var i = 0;
   while (i < input.pointers.length) {
       pointers[i] = {
           clientX: round(input.pointers[i].clientX),
           clientY: round(input.pointers[i].clientY)
       };
       i++;
   }

   return {
       timeStamp: now(),
       pointers: pointers,
       center: getCenter(pointers),
       deltaX: input.deltaX,
       deltaY: input.deltaY
   };

}

/**

* get the center of all the pointers
* @param {Array} pointers
* @return {Object} center contains `x` and `y` properties
*/

function getCenter(pointers) {

   var pointersLength = pointers.length;

   // no need to loop when only one touch
   if (pointersLength === 1) {
       return {
           x: round(pointers[0].clientX),
           y: round(pointers[0].clientY)
       };
   }

   var x = 0, y = 0, i = 0;
   while (i < pointersLength) {
       x += pointers[i].clientX;
       y += pointers[i].clientY;
       i++;
   }

   return {
       x: round(x / pointersLength),
       y: round(y / pointersLength)
   };

}

/**

* calculate the velocity between two points. unit is in px per ms.
* @param {Number} deltaTime
* @param {Number} x
* @param {Number} y
* @return {Object} velocity `x` and `y`
*/

function getVelocity(deltaTime, x, y) {

   return {
       x: x / deltaTime || 0,
       y: y / deltaTime || 0
   };

}

/**

* get the direction between two points
* @param {Number} x
* @param {Number} y
* @return {Number} direction
*/

function getDirection(x, y) {

   if (x === y) {
       return DIRECTION_NONE;
   }

   if (abs(x) >= abs(y)) {
       return x > 0 ? DIRECTION_LEFT : DIRECTION_RIGHT;
   }
   return y > 0 ? DIRECTION_UP : DIRECTION_DOWN;

}

/**

* calculate the absolute distance between two points
* @param {Object} p1 {x, y}
* @param {Object} p2 {x, y}
* @param {Array} [props] containing x and y keys
* @return {Number} distance
*/

function getDistance(p1, p2, props) {

   if (!props) {
       props = PROPS_XY;
   }
   var x = p2[props[0]] - p1[props[0]],
       y = p2[props[1]] - p1[props[1]];

   return Math.sqrt((x * x) + (y * y));

}

/**

* calculate the angle between two coordinates
* @param {Object} p1
* @param {Object} p2
* @param {Array} [props] containing x and y keys
* @return {Number} angle
*/

function getAngle(p1, p2, props) {

   if (!props) {
       props = PROPS_XY;
   }
   var x = p2[props[0]] - p1[props[0]],
       y = p2[props[1]] - p1[props[1]];
   return Math.atan2(y, x) * 180 / Math.PI;

}

/**

* calculate the rotation degrees between two pointersets
* @param {Array} start array of pointers
* @param {Array} end array of pointers
* @return {Number} rotation
*/

function getRotation(start, end) {

   return getAngle(end[1], end[0], PROPS_CLIENT_XY) - getAngle(start[1], start[0], PROPS_CLIENT_XY);

}

/**

* calculate the scale factor between two pointersets
* no scale is 1, and goes down to 0 when pinched together, and bigger when pinched out
* @param {Array} start array of pointers
* @param {Array} end array of pointers
* @return {Number} scale
*/

function getScale(start, end) {

   return getDistance(end[0], end[1], PROPS_CLIENT_XY) / getDistance(start[0], start[1], PROPS_CLIENT_XY);

}

var MOUSE_INPUT_MAP = {

   mousedown: INPUT_START,
   mousemove: INPUT_MOVE,
   mouseup: INPUT_END

};

var MOUSE_ELEMENT_EVENTS = 'mousedown'; var MOUSE_WINDOW_EVENTS = 'mousemove mouseup';

/**

* Mouse events input
* @constructor
* @extends Input
*/

function MouseInput() {

   this.evEl = MOUSE_ELEMENT_EVENTS;
   this.evWin = MOUSE_WINDOW_EVENTS;

   this.allow = true; // used by Input.TouchMouse to disable mouse events
   this.pressed = false; // mousedown state

   Input.apply(this, arguments);

}

inherit(MouseInput, Input, {

   /**
    * handle mouse events
    * @param {Object} ev
    */
   handler: function MEhandler(ev) {
       var eventType = MOUSE_INPUT_MAP[ev.type];

       // on start we want to have the left mouse button down
       if (eventType & INPUT_START && ev.button === 0) {
           this.pressed = true;
       }

       if (eventType & INPUT_MOVE && ev.which !== 1) {
           eventType = INPUT_END;
       }

       // mouse must be down, and mouse events are allowed (see the TouchMouse input)
       if (!this.pressed || !this.allow) {
           return;
       }

       if (eventType & INPUT_END) {
           this.pressed = false;
       }

       this.callback(this.manager, eventType, {
           pointers: [ev],
           changedPointers: [ev],
           pointerType: INPUT_TYPE_MOUSE,
           srcEvent: ev
       });
   }

});

var POINTER_INPUT_MAP = {

   pointerdown: INPUT_START,
   pointermove: INPUT_MOVE,
   pointerup: INPUT_END,
   pointercancel: INPUT_CANCEL,
   pointerout: INPUT_CANCEL

};

// in IE10 the pointer types is defined as an enum var IE10_POINTER_TYPE_ENUM = {

   2: INPUT_TYPE_TOUCH,
   3: INPUT_TYPE_PEN,
   4: INPUT_TYPE_MOUSE,
   5: INPUT_TYPE_KINECT // see https://twitter.com/jacobrossi/status/480596438489890816

};

var POINTER_ELEMENT_EVENTS = 'pointerdown'; var POINTER_WINDOW_EVENTS = 'pointermove pointerup pointercancel';

// IE10 has prefixed support, and case-sensitive if (window.MSPointerEvent) {

   POINTER_ELEMENT_EVENTS = 'MSPointerDown';
   POINTER_WINDOW_EVENTS = 'MSPointerMove MSPointerUp MSPointerCancel';

}

/**

* Pointer events input
* @constructor
* @extends Input
*/

function PointerEventInput() {

   this.evEl = POINTER_ELEMENT_EVENTS;
   this.evWin = POINTER_WINDOW_EVENTS;

   Input.apply(this, arguments);

   this.store = (this.manager.session.pointerEvents = []);

}

inherit(PointerEventInput, Input, {

   /**
    * handle mouse events
    * @param {Object} ev
    */
   handler: function PEhandler(ev) {
       var store = this.store;
       var removePointer = false;

       var eventTypeNormalized = ev.type.toLowerCase().replace('ms', );
       var eventType = POINTER_INPUT_MAP[eventTypeNormalized];
       var pointerType = IE10_POINTER_TYPE_ENUM[ev.pointerType] || ev.pointerType;

       var isTouch = (pointerType == INPUT_TYPE_TOUCH);

       // get index of the event in the store
       var storeIndex = inArray(store, ev.pointerId, 'pointerId');

       // start and mouse must be down
       if (eventType & INPUT_START && (ev.button === 0 || isTouch)) {
           if (storeIndex < 0) {
               store.push(ev);
               storeIndex = store.length - 1;
           }
       } else if (eventType & (INPUT_END | INPUT_CANCEL)) {
           removePointer = true;
       }

       // it not found, so the pointer hasn't been down (so it's probably a hover)
       if (storeIndex < 0) {
           return;
       }

       // update the event in the store
       store[storeIndex] = ev;

       this.callback(this.manager, eventType, {
           pointers: store,
           changedPointers: [ev],
           pointerType: pointerType,
           srcEvent: ev
       });

       if (removePointer) {
           // remove from the store
           store.splice(storeIndex, 1);
       }
   }

});

var SINGLE_TOUCH_INPUT_MAP = {

   touchstart: INPUT_START,
   touchmove: INPUT_MOVE,
   touchend: INPUT_END,
   touchcancel: INPUT_CANCEL

};

var SINGLE_TOUCH_TARGET_EVENTS = 'touchstart'; var SINGLE_TOUCH_WINDOW_EVENTS = 'touchstart touchmove touchend touchcancel';

/**

* Touch events input
* @constructor
* @extends Input
*/

function SingleTouchInput() {

   this.evTarget = SINGLE_TOUCH_TARGET_EVENTS;
   this.evWin = SINGLE_TOUCH_WINDOW_EVENTS;
   this.started = false;

   Input.apply(this, arguments);

}

inherit(SingleTouchInput, Input, {

   handler: function TEhandler(ev) {
       var type = SINGLE_TOUCH_INPUT_MAP[ev.type];

       // should we handle the touch events?
       if (type === INPUT_START) {
           this.started = true;
       }

       if (!this.started) {
           return;
       }

       var touches = normalizeSingleTouches.call(this, ev, type);

       // when done, reset the started state
       if (type & (INPUT_END | INPUT_CANCEL) && touches[0].length - touches[1].length === 0) {
           this.started = false;
       }

       this.callback(this.manager, type, {
           pointers: touches[0],
           changedPointers: touches[1],
           pointerType: INPUT_TYPE_TOUCH,
           srcEvent: ev
       });
   }

});

/**

* @this {TouchInput}
* @param {Object} ev
* @param {Number} type flag
* @returns {undefined|Array} [all, changed]
*/

function normalizeSingleTouches(ev, type) {

   var all = toArray(ev.touches);
   var changed = toArray(ev.changedTouches);

   if (type & (INPUT_END | INPUT_CANCEL)) {
       all = uniqueArray(all.concat(changed), 'identifier', true);
   }

   return [all, changed];

}

var TOUCH_INPUT_MAP = {

   touchstart: INPUT_START,
   touchmove: INPUT_MOVE,
   touchend: INPUT_END,
   touchcancel: INPUT_CANCEL

};

var TOUCH_TARGET_EVENTS = 'touchstart touchmove touchend touchcancel';

/**

* Multi-user touch events input
* @constructor
* @extends Input
*/

function TouchInput() {

   this.evTarget = TOUCH_TARGET_EVENTS;
   this.targetIds = {};

   Input.apply(this, arguments);

}

inherit(TouchInput, Input, {

   handler: function MTEhandler(ev) {
       var type = TOUCH_INPUT_MAP[ev.type];
       var touches = getTouches.call(this, ev, type);
       if (!touches) {
           return;
       }

       this.callback(this.manager, type, {
           pointers: touches[0],
           changedPointers: touches[1],
           pointerType: INPUT_TYPE_TOUCH,
           srcEvent: ev
       });
   }

});

/**

* @this {TouchInput}
* @param {Object} ev
* @param {Number} type flag
* @returns {undefined|Array} [all, changed]
*/

function getTouches(ev, type) {

   var allTouches = toArray(ev.touches);
   var targetIds = this.targetIds;

   // when there is only one touch, the process can be simplified
   if (type & (INPUT_START | INPUT_MOVE) && allTouches.length === 1) {
       targetIds[allTouches[0].identifier] = true;
       return [allTouches, allTouches];
   }

   var i,
       targetTouches,
       changedTouches = toArray(ev.changedTouches),
       changedTargetTouches = [],
       target = this.target;

   // get target touches from touches
   targetTouches = allTouches.filter(function(touch) {
       return hasParent(touch.target, target);
   });

   // collect touches
   if (type === INPUT_START) {
       i = 0;
       while (i < targetTouches.length) {
           targetIds[targetTouches[i].identifier] = true;
           i++;
       }
   }

   // filter changed touches to only contain touches that exist in the collected target ids
   i = 0;
   while (i < changedTouches.length) {
       if (targetIds[changedTouches[i].identifier]) {
           changedTargetTouches.push(changedTouches[i]);
       }

       // cleanup removed touches
       if (type & (INPUT_END | INPUT_CANCEL)) {
           delete targetIds[changedTouches[i].identifier];
       }
       i++;
   }

   if (!changedTargetTouches.length) {
       return;
   }

   return [
       // merge targetTouches with changedTargetTouches so it contains ALL touches, including 'end' and 'cancel'
       uniqueArray(targetTouches.concat(changedTargetTouches), 'identifier', true),
       changedTargetTouches
   ];

}

/**

* Combined touch and mouse input
*
* Touch has a higher priority then mouse, and while touching no mouse events are allowed.
* This because touch devices also emit mouse events while doing a touch.
*
* @constructor
* @extends Input
*/

function TouchMouseInput() {

   Input.apply(this, arguments);

   var handler = bindFn(this.handler, this);
   this.touch = new TouchInput(this.manager, handler);
   this.mouse = new MouseInput(this.manager, handler);

}

inherit(TouchMouseInput, Input, {

   /**
    * handle mouse and touch events
    * @param {Hammer} manager
    * @param {String} inputEvent
    * @param {Object} inputData
    */
   handler: function TMEhandler(manager, inputEvent, inputData) {
       var isTouch = (inputData.pointerType == INPUT_TYPE_TOUCH),
           isMouse = (inputData.pointerType == INPUT_TYPE_MOUSE);

       // when we're in a touch event, so  block all upcoming mouse events
       // most mobile browser also emit mouseevents, right after touchstart
       if (isTouch) {
           this.mouse.allow = false;
       } else if (isMouse && !this.mouse.allow) {
           return;
       }

       // reset the allowMouse when we're done
       if (inputEvent & (INPUT_END | INPUT_CANCEL)) {
           this.mouse.allow = true;
       }

       this.callback(manager, inputEvent, inputData);
   },

   /**
    * remove the event listeners
    */
   destroy: function destroy() {
       this.touch.destroy();
       this.mouse.destroy();
   }

});

var PREFIXED_TOUCH_ACTION = prefixed(TEST_ELEMENT.style, 'touchAction'); var NATIVE_TOUCH_ACTION = PREFIXED_TOUCH_ACTION !== undefined;

// magical touchAction value var TOUCH_ACTION_COMPUTE = 'compute'; var TOUCH_ACTION_AUTO = 'auto'; var TOUCH_ACTION_MANIPULATION = 'manipulation'; // not implemented var TOUCH_ACTION_NONE = 'none'; var TOUCH_ACTION_PAN_X = 'pan-x'; var TOUCH_ACTION_PAN_Y = 'pan-y';

/**

* Touch Action
* sets the touchAction property or uses the js alternative
* @param {Manager} manager
* @param {String} value
* @constructor
*/

function TouchAction(manager, value) {

   this.manager = manager;
   this.set(value);

}

TouchAction.prototype = {

   /**
    * set the touchAction value on the element or enable the polyfill
    * @param {String} value
    */
   set: function(value) {
       // find out the touch-action by the event handlers
       if (value == TOUCH_ACTION_COMPUTE) {
           value = this.compute();
       }

       if (NATIVE_TOUCH_ACTION) {
           this.manager.element.style[PREFIXED_TOUCH_ACTION] = value;
       }
       this.actions = value.toLowerCase().trim();
   },

   /**
    * just re-set the touchAction value
    */
   update: function() {
       this.set(this.manager.options.touchAction);
   },

   /**
    * compute the value for the touchAction property based on the recognizer's settings
    * @returns {String} value
    */
   compute: function() {
       var actions = [];
       each(this.manager.recognizers, function(recognizer) {
           if (boolOrFn(recognizer.options.enable, [recognizer])) {
               actions = actions.concat(recognizer.getTouchAction());
           }
       });
       return cleanTouchActions(actions.join(' '));
   },

   /**
    * this method is called on each input cycle and provides the preventing of the browser behavior
    * @param {Object} input
    */
   preventDefaults: function(input) {
       // not needed with native support for the touchAction property
       if (NATIVE_TOUCH_ACTION) {
           return;
       }

       var srcEvent = input.srcEvent;
       var direction = input.offsetDirection;

       // if the touch action did prevented once this session
       if (this.manager.session.prevented) {
           srcEvent.preventDefault();
           return;
       }

       var actions = this.actions;
       var hasNone = inStr(actions, TOUCH_ACTION_NONE);
       var hasPanY = inStr(actions, TOUCH_ACTION_PAN_Y);
       var hasPanX = inStr(actions, TOUCH_ACTION_PAN_X);

       if (hasNone ||
           (hasPanY && direction & DIRECTION_HORIZONTAL) ||
           (hasPanX && direction & DIRECTION_VERTICAL)) {
           return this.preventSrc(srcEvent);
       }
   },

   /**
    * call preventDefault to prevent the browser's default behavior (scrolling in most cases)
    * @param {Object} srcEvent
    */
   preventSrc: function(srcEvent) {
       this.manager.session.prevented = true;
       srcEvent.preventDefault();
   }

};

/**

* when the touchActions are collected they are not a valid value, so we need to clean things up. *
* @param {String} actions
* @returns {*}
*/

function cleanTouchActions(actions) {

   // none
   if (inStr(actions, TOUCH_ACTION_NONE)) {
       return TOUCH_ACTION_NONE;
   }

   var hasPanX = inStr(actions, TOUCH_ACTION_PAN_X);
   var hasPanY = inStr(actions, TOUCH_ACTION_PAN_Y);

   // pan-x and pan-y can be combined
   if (hasPanX && hasPanY) {
       return TOUCH_ACTION_PAN_X + ' ' + TOUCH_ACTION_PAN_Y;
   }

   // pan-x OR pan-y
   if (hasPanX || hasPanY) {
       return hasPanX ? TOUCH_ACTION_PAN_X : TOUCH_ACTION_PAN_Y;
   }

   // manipulation
   if (inStr(actions, TOUCH_ACTION_MANIPULATION)) {
       return TOUCH_ACTION_MANIPULATION;
   }

   return TOUCH_ACTION_AUTO;

}

/**

* Recognizer flow explained; *
* All recognizers have the initial state of POSSIBLE when a input session starts.
* The definition of a input session is from the first input until the last input, with all it's movement in it. *
* Example session for mouse-input: mousedown -> mousemove -> mouseup
*
* On each recognizing cycle (see Manager.recognize) the .recognize() method is executed
* which determines with state it should be.
*
* If the recognizer has the state FAILED, CANCELLED or RECOGNIZED (equals ENDED), it is reset to
* POSSIBLE to give it another change on the next cycle.
*
*               Possible
*                  |
*            +-----+---------------+
*            |                     |
*      +-----+-----+               |
*      |           |               |
*   Failed      Cancelled          |
*                          +-------+------+
*                          |              |
*                      Recognized       Began
*                                         |
*                                      Changed
*                                         |
*                                  Ended/Recognized
*/

var STATE_POSSIBLE = 1; var STATE_BEGAN = 2; var STATE_CHANGED = 4; var STATE_ENDED = 8; var STATE_RECOGNIZED = STATE_ENDED; var STATE_CANCELLED = 16; var STATE_FAILED = 32;

/**

* Recognizer
* Every recognizer needs to extend from this class.
* @constructor
* @param {Object} options
*/

function Recognizer(options) {

   this.id = uniqueId();

   this.manager = null;
   this.options = merge(options || {}, this.defaults);

   // default is enable true
   this.options.enable = ifUndefined(this.options.enable, true);

   this.state = STATE_POSSIBLE;

   this.simultaneous = {};
   this.requireFail = [];

}

Recognizer.prototype = {

   /**
    * @virtual
    * @type {Object}
    */
   defaults: {},

   /**
    * set options
    * @param {Object} options
    * @return {Recognizer}
    */
   set: function(options) {
       extend(this.options, options);

       // also update the touchAction, in case something changed about the directions/enabled state
       this.manager && this.manager.touchAction.update();
       return this;
   },

   /**
    * recognize simultaneous with an other recognizer.
    * @param {Recognizer} otherRecognizer
    * @returns {Recognizer} this
    */
   recognizeWith: function(otherRecognizer) {
       if (invokeArrayArg(otherRecognizer, 'recognizeWith', this)) {
           return this;
       }

       var simultaneous = this.simultaneous;
       otherRecognizer = getRecognizerByNameIfManager(otherRecognizer, this);
       if (!simultaneous[otherRecognizer.id]) {
           simultaneous[otherRecognizer.id] = otherRecognizer;
           otherRecognizer.recognizeWith(this);
       }
       return this;
   },

   /**
    * drop the simultaneous link. it doesnt remove the link on the other recognizer.
    * @param {Recognizer} otherRecognizer
    * @returns {Recognizer} this
    */
   dropRecognizeWith: function(otherRecognizer) {
       if (invokeArrayArg(otherRecognizer, 'dropRecognizeWith', this)) {
           return this;
       }

       otherRecognizer = getRecognizerByNameIfManager(otherRecognizer, this);
       delete this.simultaneous[otherRecognizer.id];
       return this;
   },

   /**
    * recognizer can only run when an other is failing
    * @param {Recognizer} otherRecognizer
    * @returns {Recognizer} this
    */
   requireFailure: function(otherRecognizer) {
       if (invokeArrayArg(otherRecognizer, 'requireFailure', this)) {
           return this;
       }

       var requireFail = this.requireFail;
       otherRecognizer = getRecognizerByNameIfManager(otherRecognizer, this);
       if (inArray(requireFail, otherRecognizer) === -1) {
           requireFail.push(otherRecognizer);
           otherRecognizer.requireFailure(this);
       }
       return this;
   },

   /**
    * drop the requireFailure link. it does not remove the link on the other recognizer.
    * @param {Recognizer} otherRecognizer
    * @returns {Recognizer} this
    */
   dropRequireFailure: function(otherRecognizer) {
       if (invokeArrayArg(otherRecognizer, 'dropRequireFailure', this)) {
           return this;
       }

       otherRecognizer = getRecognizerByNameIfManager(otherRecognizer, this);
       var index = inArray(this.requireFail, otherRecognizer);
       if (index > -1) {
           this.requireFail.splice(index, 1);
       }
       return this;
   },

   /**
    * has require failures boolean
    * @returns {boolean}
    */
   hasRequireFailures: function() {
       return this.requireFail.length > 0;
   },

   /**
    * if the recognizer can recognize simultaneous with an other recognizer
    * @param {Recognizer} otherRecognizer
    * @returns {Boolean}
    */
   canRecognizeWith: function(otherRecognizer) {
       return !!this.simultaneous[otherRecognizer.id];
   },

   /**
    * You should use `tryEmit` instead of `emit` directly to check
    * that all the needed recognizers has failed before emitting.
    * @param {Object} input
    */
   emit: function(input) {
       var self = this;
       var state = this.state;

       function emit(withState) {
           self.manager.emit(self.options.event + (withState ? stateStr(state) : ), input);
       }

       // 'panstart' and 'panmove'
       if (state < STATE_ENDED) {
           emit(true);
       }

       emit(); // simple 'eventName' events

       // panend and pancancel
       if (state >= STATE_ENDED) {
           emit(true);
       }
   },

   /**
    * Check that all the require failure recognizers has failed,
    * if true, it emits a gesture event,
    * otherwise, setup the state to FAILED.
    * @param {Object} input
    */
   tryEmit: function(input) {
       if (this.canEmit()) {
           return this.emit(input);
       }
       // it's failing anyway
       this.state = STATE_FAILED;
   },

   /**
    * can we emit?
    * @returns {boolean}
    */
   canEmit: function() {
       var i = 0;
       while (i < this.requireFail.length) {
           if (!(this.requireFail[i].state & (STATE_FAILED | STATE_POSSIBLE))) {
               return false;
           }
           i++;
       }
       return true;
   },

   /**
    * update the recognizer
    * @param {Object} inputData
    */
   recognize: function(inputData) {
       // make a new copy of the inputData
       // so we can change the inputData without messing up the other recognizers
       var inputDataClone = extend({}, inputData);

       // is is enabled and allow recognizing?
       if (!boolOrFn(this.options.enable, [this, inputDataClone])) {
           this.reset();
           this.state = STATE_FAILED;
           return;
       }

       // reset when we've reached the end
       if (this.state & (STATE_RECOGNIZED | STATE_CANCELLED | STATE_FAILED)) {
           this.state = STATE_POSSIBLE;
       }

       this.state = this.process(inputDataClone);

       // the recognizer has recognized a gesture
       // so trigger an event
       if (this.state & (STATE_BEGAN | STATE_CHANGED | STATE_ENDED | STATE_CANCELLED)) {
           this.tryEmit(inputDataClone);
       }
   },

   /**
    * return the state of the recognizer
    * the actual recognizing happens in this method
    * @virtual
    * @param {Object} inputData
    * @returns {Const} STATE
    */
   process: function(inputData) { }, // jshint ignore:line

   /**
    * return the preferred touch-action
    * @virtual
    * @returns {Array}
    */
   getTouchAction: function() { },

   /**
    * called when the gesture isn't allowed to recognize
    * like when another is being recognized or it is disabled
    * @virtual
    */
   reset: function() { }

};

/**

* get a usable string, used as event postfix
* @param {Const} state
* @returns {String} state
*/

function stateStr(state) {

   if (state & STATE_CANCELLED) {
       return 'cancel';
   } else if (state & STATE_ENDED) {
       return 'end';
   } else if (state & STATE_CHANGED) {
       return 'move';
   } else if (state & STATE_BEGAN) {
       return 'start';
   }
   return ;

}

/**

* direction cons to string
* @param {Const} direction
* @returns {String}
*/

function directionStr(direction) {

   if (direction == DIRECTION_DOWN) {
       return 'down';
   } else if (direction == DIRECTION_UP) {
       return 'up';
   } else if (direction == DIRECTION_LEFT) {
       return 'left';
   } else if (direction == DIRECTION_RIGHT) {
       return 'right';
   }
   return ;

}

/**

* get a recognizer by name if it is bound to a manager
* @param {Recognizer|String} otherRecognizer
* @param {Recognizer} recognizer
* @returns {Recognizer}
*/

function getRecognizerByNameIfManager(otherRecognizer, recognizer) {

   var manager = recognizer.manager;
   if (manager) {
       return manager.get(otherRecognizer);
   }
   return otherRecognizer;

}

/**

* This recognizer is just used as a base for the simple attribute recognizers.
* @constructor
* @extends Recognizer
*/

function AttrRecognizer() {

   Recognizer.apply(this, arguments);

}

inherit(AttrRecognizer, Recognizer, {

   /**
    * @namespace
    * @memberof AttrRecognizer
    */
   defaults: {
       /**
        * @type {Number}
        * @default 1
        */
       pointers: 1
   },

   /**
    * Used to check if it the recognizer receives valid input, like input.distance > 10.
    * @memberof AttrRecognizer
    * @param {Object} input
    * @returns {Boolean} recognized
    */
   attrTest: function(input) {
       var optionPointers = this.options.pointers;
       return optionPointers === 0 || input.pointers.length === optionPointers;
   },

   /**
    * Process the input and return the state for the recognizer
    * @memberof AttrRecognizer
    * @param {Object} input
    * @returns {*} State
    */
   process: function(input) {
       var state = this.state;
       var eventType = input.eventType;

       var isRecognized = state & (STATE_BEGAN | STATE_CHANGED);
       var isValid = this.attrTest(input);

       // on cancel input and we've recognized before, return STATE_CANCELLED
       if (isRecognized && (eventType & INPUT_CANCEL || !isValid)) {
           return state | STATE_CANCELLED;
       } else if (isRecognized || isValid) {
           if (eventType & INPUT_END) {
               return state | STATE_ENDED;
           } else if (!(state & STATE_BEGAN)) {
               return STATE_BEGAN;
           }
           return state | STATE_CHANGED;
       }
       return STATE_FAILED;
   }

});

/**

* Pan
* Recognized when the pointer is down and moved in the allowed direction.
* @constructor
* @extends AttrRecognizer
*/

function PanRecognizer() {

   AttrRecognizer.apply(this, arguments);

   this.pX = null;
   this.pY = null;

}

inherit(PanRecognizer, AttrRecognizer, {

   /**
    * @namespace
    * @memberof PanRecognizer
    */
   defaults: {
       event: 'pan',
       threshold: 10,
       pointers: 1,
       direction: DIRECTION_ALL
   },

   getTouchAction: function() {
       var direction = this.options.direction;
       var actions = [];
       if (direction & DIRECTION_HORIZONTAL) {
           actions.push(TOUCH_ACTION_PAN_Y);
       }
       if (direction & DIRECTION_VERTICAL) {
           actions.push(TOUCH_ACTION_PAN_X);
       }
       return actions;
   },

   directionTest: function(input) {
       var options = this.options;
       var hasMoved = true;
       var distance = input.distance;
       var direction = input.direction;
       var x = input.deltaX;
       var y = input.deltaY;

       // lock to axis?
       if (!(direction & options.direction)) {
           if (options.direction & DIRECTION_HORIZONTAL) {
               direction = (x === 0) ? DIRECTION_NONE : (x < 0) ? DIRECTION_LEFT : DIRECTION_RIGHT;
               hasMoved = x != this.pX;
               distance = Math.abs(input.deltaX);
           } else {
               direction = (y === 0) ? DIRECTION_NONE : (y < 0) ? DIRECTION_UP : DIRECTION_DOWN;
               hasMoved = y != this.pY;
               distance = Math.abs(input.deltaY);
           }
       }
       input.direction = direction;
       return hasMoved && distance > options.threshold && direction & options.direction;
   },

   attrTest: function(input) {
       return AttrRecognizer.prototype.attrTest.call(this, input) &&
           (this.state & STATE_BEGAN || (!(this.state & STATE_BEGAN) && this.directionTest(input)));
   },

   emit: function(input) {
       this.pX = input.deltaX;
       this.pY = input.deltaY;

       var direction = directionStr(input.direction);
       if (direction) {
           this.manager.emit(this.options.event + direction, input);
       }

       this._super.emit.call(this, input);
   }

});

/**

* Pinch
* Recognized when two or more pointers are moving toward (zoom-in) or away from each other (zoom-out).
* @constructor
* @extends AttrRecognizer
*/

function PinchRecognizer() {

   AttrRecognizer.apply(this, arguments);

}

inherit(PinchRecognizer, AttrRecognizer, {

   /**
    * @namespace
    * @memberof PinchRecognizer
    */
   defaults: {
       event: 'pinch',
       threshold: 0,
       pointers: 2
   },

   getTouchAction: function() {
       return [TOUCH_ACTION_NONE];
   },

   attrTest: function(input) {
       return this._super.attrTest.call(this, input) &&
           (Math.abs(input.scale - 1) > this.options.threshold || this.state & STATE_BEGAN);
   },

   emit: function(input) {
       this._super.emit.call(this, input);
       if (input.scale !== 1) {
           var inOut = input.scale < 1 ? 'in' : 'out';
           this.manager.emit(this.options.event + inOut, input);
       }
   }

});

/**

* Press
* Recognized when the pointer is down for x ms without any movement.
* @constructor
* @extends Recognizer
*/

function PressRecognizer() {

   Recognizer.apply(this, arguments);

   this._timer = null;
   this._input = null;

}

inherit(PressRecognizer, Recognizer, {

   /**
    * @namespace
    * @memberof PressRecognizer
    */
   defaults: {
       event: 'press',
       pointers: 1,
       time: 500, // minimal time of the pointer to be pressed
       threshold: 5 // a minimal movement is ok, but keep it low
   },

   getTouchAction: function() {
       return [TOUCH_ACTION_AUTO];
   },

   process: function(input) {
       var options = this.options;
       var validPointers = input.pointers.length === options.pointers;
       var validMovement = input.distance < options.threshold;
       var validTime = input.deltaTime > options.time;

       this._input = input;

       // we only allow little movement
       // and we've reached an end event, so a tap is possible
       if (!validMovement || !validPointers || (input.eventType & (INPUT_END | INPUT_CANCEL) && !validTime)) {
           this.reset();
       } else if (input.eventType & INPUT_START) {
           this.reset();
           this._timer = setTimeoutContext(function() {
               this.state = STATE_RECOGNIZED;
               this.tryEmit();
           }, options.time, this);
       } else if (input.eventType & INPUT_END) {
           return STATE_RECOGNIZED;
       }
       return STATE_FAILED;
   },

   reset: function() {
       clearTimeout(this._timer);
   },

   emit: function(input) {
       if (this.state !== STATE_RECOGNIZED) {
           return;
       }

       if (input && (input.eventType & INPUT_END)) {
           this.manager.emit(this.options.event + 'up', input);
       } else {
           this._input.timeStamp = now();
           this.manager.emit(this.options.event, this._input);
       }
   }

});

/**

* Rotate
* Recognized when two or more pointer are moving in a circular motion.
* @constructor
* @extends AttrRecognizer
*/

function RotateRecognizer() {

   AttrRecognizer.apply(this, arguments);

}

inherit(RotateRecognizer, AttrRecognizer, {

   /**
    * @namespace
    * @memberof RotateRecognizer
    */
   defaults: {
       event: 'rotate',
       threshold: 0,
       pointers: 2
   },

   getTouchAction: function() {
       return [TOUCH_ACTION_NONE];
   },

   attrTest: function(input) {
       return this._super.attrTest.call(this, input) &&
           (Math.abs(input.rotation) > this.options.threshold || this.state & STATE_BEGAN);
   }

});

/**

* Swipe
* Recognized when the pointer is moving fast (velocity), with enough distance in the allowed direction.
* @constructor
* @extends AttrRecognizer
*/

function SwipeRecognizer() {

   AttrRecognizer.apply(this, arguments);

}

inherit(SwipeRecognizer, AttrRecognizer, {

   /**
    * @namespace
    * @memberof SwipeRecognizer
    */
   defaults: {
       event: 'swipe',
       threshold: 10,
       velocity: 0.65,
       direction: DIRECTION_HORIZONTAL | DIRECTION_VERTICAL,
       pointers: 1
   },

   getTouchAction: function() {
       return PanRecognizer.prototype.getTouchAction.call(this);
   },

   attrTest: function(input) {
       var direction = this.options.direction;
       var velocity;

       if (direction & (DIRECTION_HORIZONTAL | DIRECTION_VERTICAL)) {
           velocity = input.velocity;
       } else if (direction & DIRECTION_HORIZONTAL) {
           velocity = input.velocityX;
       } else if (direction & DIRECTION_VERTICAL) {
           velocity = input.velocityY;
       }

       return this._super.attrTest.call(this, input) &&
           direction & input.direction &&
           input.distance > this.options.threshold &&
           abs(velocity) > this.options.velocity && input.eventType & INPUT_END;
   },

   emit: function(input) {
       var direction = directionStr(input.direction);
       if (direction) {
           this.manager.emit(this.options.event + direction, input);
       }

       this.manager.emit(this.options.event, input);
   }

});

/**

* A tap is ecognized when the pointer is doing a small tap/click. Multiple taps are recognized if they occur
* between the given interval and position. The delay option can be used to recognize multi-taps without firing
* a single tap.
*
* The eventData from the emitted event contains the property `tapCount`, which contains the amount of
* multi-taps being recognized.
* @constructor
* @extends Recognizer
*/

function TapRecognizer() {

   Recognizer.apply(this, arguments);

   // previous time and center,
   // used for tap counting
   this.pTime = false;
   this.pCenter = false;

   this._timer = null;
   this._input = null;
   this.count = 0;

}

inherit(TapRecognizer, Recognizer, {

   /**
    * @namespace
    * @memberof PinchRecognizer
    */
   defaults: {
       event: 'tap',
       pointers: 1,
       taps: 1,
       interval: 300, // max time between the multi-tap taps
       time: 250, // max time of the pointer to be down (like finger on the screen)
       threshold: 2, // a minimal movement is ok, but keep it low
       posThreshold: 10 // a multi-tap can be a bit off the initial position
   },

   getTouchAction: function() {
       return [TOUCH_ACTION_MANIPULATION];
   },

   process: function(input) {
       var options = this.options;

       var validPointers = input.pointers.length === options.pointers;
       var validMovement = input.distance < options.threshold;
       var validTouchTime = input.deltaTime < options.time;

       this.reset();

       if ((input.eventType & INPUT_START) && (this.count === 0)) {
           return this.failTimeout();
       }

       // we only allow little movement
       // and we've reached an end event, so a tap is possible
       if (validMovement && validTouchTime && validPointers) {
           if (input.eventType != INPUT_END) {
               return this.failTimeout();
           }

           var validInterval = this.pTime ? (input.timeStamp - this.pTime < options.interval) : true;
           var validMultiTap = !this.pCenter || getDistance(this.pCenter, input.center) < options.posThreshold;

           this.pTime = input.timeStamp;
           this.pCenter = input.center;

           if (!validMultiTap || !validInterval) {
               this.count = 1;
           } else {
               this.count += 1;
           }

           this._input = input;

           // if tap count matches we have recognized it,
           // else it has began recognizing...
           var tapCount = this.count % options.taps;
           if (tapCount === 0) {
               // no failing requirements, immediately trigger the tap event
               // or wait as long as the multitap interval to trigger
               if (!this.hasRequireFailures()) {
                   return STATE_RECOGNIZED;
               } else {
                   this._timer = setTimeoutContext(function() {
                       this.state = STATE_RECOGNIZED;
                       this.tryEmit();
                   }, options.interval, this);
                   return STATE_BEGAN;
               }
           }
       }
       return STATE_FAILED;
   },

   failTimeout: function() {
       this._timer = setTimeoutContext(function() {
           this.state = STATE_FAILED;
       }, this.options.interval, this);
       return STATE_FAILED;
   },

   reset: function() {
       clearTimeout(this._timer);
   },

   emit: function() {
       if (this.state == STATE_RECOGNIZED ) {
           this._input.tapCount = this.count;
           this.manager.emit(this.options.event, this._input);
       }
   }

});

</script>