forked from metafizzy/infinite-scroll
-
Notifications
You must be signed in to change notification settings - Fork 0
/
jquery.infinitescroll.min.js
47 lines (44 loc) · 10.7 KB
/
jquery.infinitescroll.min.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
/*
--------------------------------
Infinite Scroll
--------------------------------
+ https://github.com/paulirish/infinitescroll
+ version 2.0b2.110713
+ Copyright 2011 Paul Irish & Luke Shumard
+ Licensed under the MIT license
+ Documentation: http://infinite-scroll.com/
*/
(function(window,$,undefined){$.infinitescroll=function infscr(options,callback,element){this.element=$(element);this._create(options,callback);};$.infinitescroll.defaults={loading:{finished:undefined,finishedMsg:"<em>Congratulations, you've reached the end of the internet.</em>",img:"http://www.infinite-scroll.com/loading.gif",msg:null,msgText:"<em>Loading the next set of posts...</em>",selector:null,speed:'fast',start:undefined},state:{isDuringAjax:false,isInvalidPage:false,isDestroyed:false,isDone:false,isPaused:false,currPage:1},callback:undefined,debug:false,behavior:undefined,binder:$(window),nextSelector:"div.navigation a:first",navSelector:"div.navigation",contentSelector:null,extraScrollPx:150,itemSelector:"div.post",animate:false,pathParse:undefined,dataType:'html',appendCallback:true,bufferPx:40,errorCallback:function(){},infid:0,pixelsFromNavToBottom:undefined,path:undefined};$.infinitescroll.prototype={_binding:function infscr_binding(binding){var instance=this,opts=instance.options;if(!!opts.behavior&&this['_binding_'+opts.behavior]!==undefined){this['_binding_'+opts.behavior].call(this);return;}
if(binding!=='bind'&&binding!=='unbind'){this._debug('Binding value '+binding+' not valid')
return false;}
if(binding=='unbind'){(this.options.binder).unbind('smartscroll.infscr.'+instance.options.infid);}else{(this.options.binder)[binding]('smartscroll.infscr.'+instance.options.infid,function(){instance.scroll();});};this._debug('Binding',binding);},_create:function infscr_create(options,callback){if(!this._validate(options)){return false;}
var opts=this.options=$.extend(true,{},$.infinitescroll.defaults,options),relurl=/(.*?\/\/).*?(\/.*)/,path=$(opts.nextSelector).attr('href');opts.contentSelector=opts.contentSelector||this.element;opts.loading.selector=opts.loading.selector||opts.contentSelector;if(!path){this._debug('Navigation selector not found');return;}
opts.path=this._determinepath(path);opts.loading.msg=$('<div id="infscr-loading"><img alt="Loading..." src="'+opts.loading.img+'" /><div>'+opts.loading.msgText+'</div></div>');(new Image()).src=opts.loading.img;opts.pixelsFromNavToBottom=$(document).height()-$(opts.navSelector).offset().top;opts.loading.start=opts.loading.start||function(){$(opts.navSelector).hide();opts.loading.msg.appendTo(opts.loading.selector).show(opts.loading.speed,function(){beginAjax(opts);});};opts.loading.finished=opts.loading.finished||function(){opts.loading.msg.fadeOut('normal');};opts.callback=function(instance,data){if(!!opts.behavior&&instance['_callback_'+opts.behavior]!==undefined){instance['_callback_'+opts.behavior].call($(opts.contentSelector)[0],data);}
if(callback){callback.call($(opts.contentSelector)[0],data);}};this._setup();},_debug:function infscr_debug(){if(this.options.debug){return window.console&&console.log.call(console,arguments);}},_determinepath:function infscr_determinepath(path){var opts=this.options;if(!!opts.behavior&&this['_determinepath_'+opts.behavior]!==undefined){this['_determinepath_'+opts.behavior].call(this,path);return;}
if(!!opts.pathParse){this._debug('pathParse manual');return opts.pathParse;}else if(path.match(/^(.*?)\b2\b(.*?$)/)){path=path.match(/^(.*?)\b2\b(.*?$)/).slice(1);}else if(path.match(/^(.*?)2(.*?$)/)){if(path.match(/^(.*?page=)2(\/.*|$)/)){path=path.match(/^(.*?page=)2(\/.*|$)/).slice(1);return path;}
path=path.match(/^(.*?)2(.*?$)/).slice(1);}else{if(path.match(/^(.*?page=)1(\/.*|$)/)){path=path.match(/^(.*?page=)1(\/.*|$)/).slice(1);return path;}else{this._debug('Sorry, we couldn\'t parse your Next (Previous Posts) URL. Verify your the css selector points to the correct A tag. If you still get this error: yell, scream, and kindly ask for help at infinite-scroll.com.');opts.state.isInvalidPage=true;}}
this._debug('determinePath',path);return path;},_error:function infscr_error(xhr){var opts=this.options;if(!!opts.behavior&&this['_error_'+opts.behavior]!==undefined){this['_error_'+opts.behavior].call(this,xhr);return;}
if(xhr!=='destroy'&&xhr!=='end'){xhr='unknown';}
this._debug('Error',xhr);if(xhr=='end'){this._showdonemsg();}
opts.state.isDone=true;opts.state.currPage=1;opts.state.isPaused=false;this._binding('unbind');},_loadcallback:function infscr_loadcallback(box,data){var opts=this.options,callback=this.options.callback,result=(opts.state.isDone)?'done':(!opts.appendCallback)?'no-append':'append',frag;if(!!opts.behavior&&this['_loadcallback_'+opts.behavior]!==undefined){this['_loadcallback_'+opts.behavior].call(this,box,data);return;}
switch(result){case'done':this._showdonemsg();return false;break;case'no-append':if(opts.dataType=='html'){data='<div>'+data+'</div>';data=$(data).find(opts.itemSelector);};break;case'append':var children=box.children();if(children.length==0){return this._error('end');}
frag=document.createDocumentFragment();while(box[0].firstChild){frag.appendChild(box[0].firstChild);}
this._debug('contentSelector',$(opts.contentSelector)[0])
$(opts.contentSelector)[0].appendChild(frag);data=children.get();break;}
opts.loading.finished.call($(opts.contentSelector)[0],opts)
if(opts.animate){var scrollTo=$(window).scrollTop()+$('#infscr-loading').height()+opts.extraScrollPx+'px';$('html,body').animate({scrollTop:scrollTo},800,function(){opts.state.isDuringAjax=false;});}
if(!opts.animate)opts.state.isDuringAjax=false;callback(this,data);},_nearbottom:function infscr_nearbottom(){var opts=this.options,pixelsFromWindowBottomToBottom=0+$(document).height()-(opts.binder.scrollTop())-$(window).height();if(!!opts.behavior&&this['_nearbottom_'+opts.behavior]!==undefined){this['_nearbottom_'+opts.behavior].call(this);return;}
this._debug('math:',pixelsFromWindowBottomToBottom,opts.pixelsFromNavToBottom);return(pixelsFromWindowBottomToBottom-opts.bufferPx<opts.pixelsFromNavToBottom);},_pausing:function infscr_pausing(pause){var opts=this.options;if(!!opts.behavior&&this['_pausing_'+opts.behavior]!==undefined){this['_pausing_'+opts.behavior].call(this,pause);return;}
if(pause!=='pause'&&pause!=='resume'&&pause!==null){this._debug('Invalid argument. Toggling pause value instead');};pause=(pause&&(pause=='pause'||pause=='resume'))?pause:'toggle';switch(pause){case'pause':opts.state.isPaused=true;break;case'resume':opts.state.isPaused=false;break;case'toggle':opts.state.isPaused=!opts.state.isPaused;break;}
this._debug('Paused',opts.state.isPaused);return false;},_setup:function infscr_setup(){var opts=this.options;if(!!opts.behavior&&this['_setup_'+opts.behavior]!==undefined){this['_setup_'+opts.behavior].call(this);return;}
this._binding('bind');return false;},_showdonemsg:function infscr_showdonemsg(){var opts=this.options;if(!!opts.behavior&&this['_showdonemsg_'+opts.behavior]!==undefined){this['_showdonemsg_'+opts.behavior].call(this);return;}
opts.loading.msg.find('img').hide().parent().find('div').html(opts.loading.finishedMsg).animate({opacity:1},2000,function(){$(this).parent().fadeOut('normal');});opts.errorCallback.call($(opts.contentSelector)[0],'done');},_validate:function infscr_validate(opts){for(var key in opts){if(key.indexOf&&key.indexOf('Selector')>-1&&$(opts[key]).length===0){this._debug('Your '+key+' found no elements.');return false;}
return true;}},bind:function infscr_bind(){this._binding('bind');},destroy:function infscr_destroy(){this.options.state.isDestroyed=true;return this._error('destroy');},pause:function infscr_pause(){this._pausing('pause');},resume:function infscr_resume(){this._pausing('resume');},retrieve:function infscr_retrieve(pageNum){var instance=this,opts=instance.options,path=opts.path,box,frag,desturl,method,condition,pageNum=pageNum||null,getPage=(!!pageNum)?pageNum:opts.state.currPage;beginAjax=function infscr_ajax(opts){opts.state.currPage++;instance._debug('heading into ajax',path);box=$(opts.contentSelector).is('table')?$('<tbody/>'):$('<div/>');desturl=path.join(opts.state.currPage);method=(opts.dataType=='html'||opts.dataType=='json')?opts.dataType:'html+callback';if(opts.appendCallback&&opts.dataType=='html')method+='+callback'
switch(method){case'html+callback':instance._debug('Using HTML via .load() method');box.load(desturl+' '+opts.itemSelector,null,function infscr_ajax_callback(responseText){instance._loadcallback(box,responseText);});break;case'html':case'json':instance._debug('Using '+(method.toUpperCase())+' via $.ajax() method');$.ajax({url:desturl,dataType:opts.dataType,complete:function infscr_ajax_callback(jqXHR,textStatus){condition=(typeof(jqXHR.isResolved)!=='undefined')?(jqXHR.isResolved()):(textStatus==="success"||textStatus==="notmodified");(condition)?instance._loadcallback(box,jqXHR.responseText):instance._error('end');}});break;}};if(!!opts.behavior&&this['retrieve_'+opts.behavior]!==undefined){this['retrieve_'+opts.behavior].call(this,pageNum);return;}
if(opts.state.isDestroyed){this._debug('Instance is destroyed');return false;};opts.state.isDuringAjax=true;opts.loading.start.call($(opts.contentSelector)[0],opts);},scroll:function infscr_scroll(){var opts=this.options,state=opts.state;if(!!opts.behavior&&this['scroll_'+opts.behavior]!==undefined){this['scroll_'+opts.behavior].call(this);return;}
if(state.isDuringAjax||state.isInvalidPage||state.isDone||state.isDestroyed||state.isPaused)return;if(!this._nearbottom())return;this.retrieve();},toggle:function infscr_toggle(){this._pausing();},unbind:function infscr_unbind(){this._binding('unbind');},update:function infscr_options(key){if($.isPlainObject(key)){this.options=$.extend(true,this.options,key);}}}
$.fn.infinitescroll=function infscr_init(options,callback){var thisCall=typeof options;switch(thisCall){case'string':var args=Array.prototype.slice.call(arguments,1);this.each(function(){var instance=$.data(this,'infinitescroll');if(!instance){return false;}
if(!$.isFunction(instance[options])||options.charAt(0)==="_"){return false;}
instance[options].apply(instance,args);});break;case'object':this.each(function(){var instance=$.data(this,'infinitescroll');if(instance){instance.update(options);}else{$.data(this,'infinitescroll',new $.infinitescroll(options,callback,this));}});break;}
return this;};var event=$.event,scrollTimeout;event.special.smartscroll={setup:function(){$(this).bind("scroll",event.special.smartscroll.handler);},teardown:function(){$(this).unbind("scroll",event.special.smartscroll.handler);},handler:function(event,execAsap){var context=this,args=arguments;event.type="smartscroll";if(scrollTimeout){clearTimeout(scrollTimeout);}
scrollTimeout=setTimeout(function(){$.event.handle.apply(context,args);},execAsap==="execAsap"?0:100);}};$.fn.smartscroll=function(fn){return fn?this.bind("smartscroll",fn):this.trigger("smartscroll",["execAsap"]);};})(window,jQuery);