swipe-list/dist/jquery.swipe-list.min.js

Infinite scroll replacement for weak mobile devices.

(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);throw new Error("Cannot find module '"+o+"'")}var f=n[o]={exports:{}};t[o][0].call(f.exports,function(e){var n=t[o][1][e];return s(n?n:e)},f,f.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){var styles=["webkitTransform","MozTransform","msTransform","OTransform","transform"];var el=document.createElement("p");var style;for(var i=0;i<styles.length;i++){style=styles[i];if(null!=el.style[style]){module.exports=style;break}}},{}],2:[function(require,module,exports){"use strict";var transform=require("transform-property"),vendor=transform.substr(0,transform.length-9),$=jQuery;function SwipeList($container,options){this.elements={container:$container};this.options=$.extend({},SwipeList.defaults,options);this._currentVirtualPage=0;this._itemsPerPage=0;this._moving=false}module.exports=SwipeList;SwipeList.defaults={items:null,pages:3,render:$.noop,data:[],swipeThreshold:10,easing:"cubic-bezier(0.190, 1.000, 0.220, 1.000)",duration:500,swipeBeforeRelease:true};SwipeList.prototype.init=function(){this.elements.items=this.elements.container.find(this.options.items);this.elements.container.addClass("swipe-list");this._calcDimensions();this._splitPages();this._insertPages();this._renderPage(0);this._renderPage(1);this._bind()};SwipeList.prototype._bind=function(){this.elements.container.on("movestart",this._onMoveStart.bind(this)).on("moveend",this._onMoveEnd.bind(this)).on("swipeup",this._onSwipeUp.bind(this)).on("swipedown",this._onSwipeDown.bind(this))};SwipeList.prototype._calcDimensions=function(){this._containerHeight=this.elements.container.height();this._itemHeight=this.elements.items.eq(0).outerHeight();this._itemsPerPage=Math.floor(this._containerHeight/this._itemHeight)};SwipeList.prototype._splitPages=function(){var self=this,$items=this.elements.items,pageNr,itemNr=0,itemNrInPage,$page,$pages=$();for(pageNr=0;pageNr<this.options.pages;pageNr++){$page=$('<div class="swipe-list-page swipe-list-page-'+pageNr+'"></div>');$pages=$pages.add($page);for(itemNrInPage=0;itemNrInPage<this._itemsPerPage;itemNrInPage++){if($items[itemNr])$items.eq(itemNr).appendTo($page);itemNr++}}this._setTranslateY($pages[1],this._containerHeight,true);this._setTranslateY($pages[2],this._containerHeight,true);this.elements.pages=$pages;this._setZIndexes($pages.eq(0))};SwipeList.prototype._insertPages=function(){this.elements.container.html(this.elements.pages)};SwipeList.prototype._renderPage=function(virtualPageNr){var o=this.options,realPageNr=virtualPageNr%o.pages,realElemNr=realPageNr*this._itemsPerPage,virtualElemNr=virtualPageNr*this._itemsPerPage,i,$item;for(i=0;i<this._itemsPerPage;i++){$item=this.elements.items.eq(realElemNr);o.render($item,o.data[virtualElemNr]);realElemNr++;virtualElemNr++}};SwipeList.prototype._move=function($el,callback){var self=this,o=this.options;this._moving=true;this._onceTransitionEnd($el[0],o.duration,function(){self._moving=false;callback()});requestAnimationFrame(function(){self._setTranslateY($el[0],0)})};SwipeList.prototype._setTranslateY=function(el,y,removeTransition){var self=this,o=this.options;if(removeTransition)this._setTransition(el,null);requestAnimationFrame(function(){el.style[transform]="translateY("+y+"px)";removeTransition&&requestAnimationFrame(function(){self._setTransition(el,o.duration+"ms "+o.easing)})})};SwipeList.prototype._setTransition=function(el,value){el.style[vendor+"Transition"]=value||"";return this};SwipeList.prototype._setZIndexes=function($current){this.elements.pages.css("z-index",1);$current.css("z-index",0)};SwipeList.prototype._hasNext=function(){return Boolean(this.options.data[(this._currentVirtualPage+1)*this._itemsPerPage])};SwipeList.prototype._hasPrev=function(){return Boolean(this.options.data[(this._currentVirtualPage-1)*this._itemsPerPage])};SwipeList.prototype._getNextPageEl=function(){var curRealPage=this._getRealPage(),nextRealPage=curRealPage+1>=this.options.pages?0:curRealPage+1;return this.elements.pages.eq(nextRealPage)};SwipeList.prototype._getPrevPageEl=function(){var curRealPage=this._getRealPage(),prevRealPage=curRealPage-1<0?this.options.pages-1:curRealPage-1;return this.elements.pages.eq(prevRealPage)};SwipeList.prototype._getRealPage=function(){return this._currentVirtualPage%this.options.pages};SwipeList.prototype._onceTransitionEnd=function(el,duration,callback){el.addEventListener(vendor+"TransitionEnd",function onTransitionEnd(){el.removeEventListener(vendor+"TransitionEnd",onTransitionEnd);if(callback)callback();callback=null},false);setTimeout(function(){if(callback)callback();callback=null},duration+50);return this};SwipeList.prototype._checkSwipe=function(e){var event;this._currentY=e.pageY;this._dist=Math.abs(this._currentY-this._startY);if(this._dist>this.options.swipeThreshold){event=this._currentY>this._startY?"swipedown":"swipeup";this.elements.container.triggerHandler(event);if(this.options.swipeBeforeRelease){this.elements.container.off("move")}}};SwipeList.prototype._onMoveStart=function(e){this._startY=e.pageY;if(this.options.swipeBeforeRelease){this.elements.container.on("move",this._onMove.bind(this))}};SwipeList.prototype._onMove=SwipeList.prototype._checkSwipe;SwipeList.prototype._onMoveEnd=function(e){if(this.options.swipeBeforeRelease){this.elements.container.off("move")}else{this._checkSwipe(e)}};SwipeList.prototype._onSwipeUp=function(){var self=this,o=this.options,$next;if(this._moving||!this._hasNext())return;$next=this._getNextPageEl();this._currentVirtualPage++;this._move($next,function(){var $prev=self._getPrevPageEl(),$current=$next;self._setTranslateY($prev[0],-self._containerHeight,true);if(self._hasNext()){$next=self._getNextPageEl();self._setTranslateY($next[0],self._containerHeight,true);self._renderPage(self._currentVirtualPage+1)}requestAnimationFrame(function(){self._setZIndexes($current)})})};SwipeList.prototype._onSwipeDown=function(){var self=this,o=this.options,$prev;if(this._moving||!this._hasPrev())return;$prev=this._getPrevPageEl();this._currentVirtualPage--;this._move($prev,function(){var $next=self._getNextPageEl(),$current=$prev;self._setTranslateY($next[0],self._containerHeight,true);if(self._hasPrev()){$prev=self._getPrevPageEl();self._setTranslateY($prev[0],-self._containerHeight,true);self._renderPage(self._currentVirtualPage-1)}requestAnimationFrame(function(){self._setZIndexes($current)})})}},{"transform-property":1}],3:[function(require,module,exports){"use strict";var SwipeList=require("./index"),slice=[].slice;$.fn.swipeList=function(options){var ret,args=slice.call(arguments,1);this.each(function(){var $this=$(this),inst=$this.data("swipeList");if(inst){ret=inst[options].apply(inst,args);if(ret===inst)ret=null}else{inst=new SwipeList($this,options);inst.init();$this.data("swipeList",inst)}});return ret!=null?ret:this};$.fn.swipeList.SwipeList=SwipeList},{"./index":2}]},{},[3]);