/**
 * This script has been modified to account for reverse direction of subsequent page loads,
 * e.g. /page-200/, /page-199/, /page-198/, etc.
 *
 * Modified by Syahir Hakim (syahir [at] khairul-syahir.com)
 */
(function(e,t,n){"use strict";t.infinitescroll=function(n,r,i){this.element=t(i);if(!this._create(n,r)){this.failed=true}};t.infinitescroll.defaults={direction:'forward',loading:{finished:n,finishedMsg:"<em>Congratulations, you've reached the end of the internet.</em>",img:"",msg:null,msgText:"<em>Loading the next set of posts...</em>",selector:null,speed:"fast",start:n},state:{isDuringAjax:false,isInvalidPage:false,isDestroyed:false,isDone:false,isPaused:false,isBeyondMaxPage:false,currPage:1},debug:false,behavior:n,binder:t(e),nextSelector:"div.navigation a:first",navSelector:"div.navigation",contentSelector:null,extraScrollPx:150,itemSelector:"div.post",animate:false,pathParse:n,dataType:"html",appendCallback:true,bufferPx:40,errorCallback:function(){},infid:0,pixelsFromNavToBottom:n,path:n,prefill:false,maxPage:n};t.infinitescroll.prototype={_binding:function(t){var r=this,i=r.options;i.v="2.0b2.120520";if(!!i.behavior&&this["_binding_"+i.behavior]!==n){this["_binding_"+i.behavior].call(this);return}if(t!=="bind"&&t!=="unbind"){this._debug("Binding value  "+t+" not valid");return false}if(t==="unbind"){this.options.binder.unbind("smartscroll.infscr."+r.options.infid)}else{this.options.binder[t]("smartscroll.infscr."+r.options.infid,function(){r.scroll()})}this._debug("Binding",t)},_create:function(i,s){var o=t.extend(true,{},t.infinitescroll.defaults,i);this.options=o;var u=t(e);var a=this;if(!a._validate(i)){return false}var f=t(o.nextSelector).attr("href");if(!f){this._debug("Navigation selector not found");return false}o.path=o.path||this._determinepath(f);o.contentSelector=o.contentSelector||this.element;o.loading.selector=o.loading.selector||o.contentSelector;o.loading.msg=o.loading.msg||t('<div id="infscr-loading"><img alt="Loading..." src="'+o.loading.img+'" /><div>'+o.loading.msgText+"</div></div>");(new Image).src=o.loading.img;if(o.pixelsFromNavToBottom===n){o.pixelsFromNavToBottom=t(document).height()-t(o.navSelector).offset().top;this._debug("pixelsFromNavToBottom: "+o.pixelsFromNavToBottom)}var l=this;o.loading.start=o.loading.start||function(){t(o.navSelector).hide();o.loading.msg.appendTo(o.loading.selector).fadeIn(o.loading.speed,t.proxy(function(){this.beginAjax(o)},l))};o.loading.finished=o.loading.finished||function(){if(!o.state.isBeyondMaxPage)o.loading.msg.fadeOut(o.loading.speed)};o.callback=function(e,r,i){if(!!o.behavior&&e["_callback_"+o.behavior]!==n){e["_callback_"+o.behavior].call(t(o.contentSelector)[0],r,i)}if(s){s.call(t(o.contentSelector)[0],r,o,i)}if(o.prefill){u.bind("resize.infinite-scroll",e._prefill)}};if(i.debug){if(Function.prototype.bind&&(typeof console==="object"||typeof console==="function")&&typeof console.log==="object"){["log","info","warn","error","assert","dir","clear","profile","profileEnd"].forEach(function(e){console[e]=this.call(console[e],console)},Function.prototype.bind)}}this._setup();if(o.prefill){this._prefill()}return true},_prefill:function(){function s(){return r.options.contentSelector.height()<=i.height()}var r=this;var i=t(e);this._prefill=function(){if(s()){r.scroll()}i.bind("resize.infinite-scroll",function(){if(s()){i.unbind("resize.infinite-scroll");r.scroll()}})};this._prefill()},_debug:function(){if(true!==this.options.debug){return}if(typeof console!=="undefined"&&typeof console.log==="function"){if(Array.prototype.slice.call(arguments).length===1&&typeof Array.prototype.slice.call(arguments)[0]==="string"){console.log(Array.prototype.slice.call(arguments).toString())}else{console.log(Array.prototype.slice.call(arguments))}}else if(!Function.prototype.bind&&typeof console!=="undefined"&&typeof console.log==="object"){Function.prototype.call.call(console.log,console,Array.prototype.slice.call(arguments))}},_determinepath:function(t){var r=this.options;if(!!r.behavior&&this["_determinepath_"+r.behavior]!==n){return this["_determinepath_"+r.behavior].call(this,t)}if(!!r.pathParse){this._debug("pathParse manual");return r.pathParse(t,this.options.state.currPage+1)}else if(t.match(/^(.*?)\b2\b(.*?$)/)){t=t.match(/^(.*?)\b2\b(.*?$)/).slice(1)}else if(t.match(/^(.*?)2(.*?$)/)){if(t.match(/^(.*?page=)2(\/.*|$)/)){t=t.match(/^(.*?page=)2(\/.*|$)/).slice(1);return t}t=t.match(/^(.*?)2(.*?$)/).slice(1)}else{if(t.match(/^(.*?page=)1(\/.*|$)/)){t=t.match(/^(.*?page=)1(\/.*|$)/).slice(1);return t}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.");r.state.isInvalidPage=true}}this._debug("determinePath",t);return t},_error:function(t){var r=this.options;if(!!r.behavior&&this["_error_"+r.behavior]!==n){this["_error_"+r.behavior].call(this,t);return}if(t!=="destroy"&&t!=="end"){t="unknown"}this._debug("Error",t);if(t==="end"||r.state.isBeyondMaxPage){this._showdonemsg()}r.state.isDone=true;r.state.currPage=1;r.state.isPaused=false;r.state.isBeyondMaxPage=false;this._binding("unbind")},_loadcallback:function(i,s,o){var u=this.options,a=this.options.callback,f=u.state.isDone?"done":!u.appendCallback?"no-append":"append",l;if(!!u.behavior&&this["_loadcallback_"+u.behavior]!==n){this["_loadcallback_"+u.behavior].call(this,i,s);return}switch(f){case"done":this._showdonemsg();return false;case"no-append":if(u.dataType==="html"){s="<div>"+s+"</div>";s=t(s).find(u.itemSelector)}break;case"append":var c=i.children();if(c.length===0){return this._error("end")}l=document.createDocumentFragment();while(i[0].firstChild){l.appendChild(i[0].firstChild)}this._debug("contentSelector",t(u.contentSelector)[0]);t(u.contentSelector)[0].appendChild(l);s=c.get();break}u.loading.finished.call(t(u.contentSelector)[0],u);if(u.animate){var h=t(e).scrollTop()+t(u.loading.msg).height()+u.extraScrollPx+"px";t("html,body").animate({scrollTop:h},800,function(){u.state.isDuringAjax=false})}if(!u.animate){u.state.isDuringAjax=false}a(this,s,o);if(u.prefill){this._prefill()}},_nearbottom:function(){var i=this.options,s=0+t(document).height()-i.binder.scrollTop()-t(e).height();if(!!i.behavior&&this["_nearbottom_"+i.behavior]!==n){return this["_nearbottom_"+i.behavior].call(this)}this._debug("math:",s,i.pixelsFromNavToBottom);return s-i.bufferPx<i.pixelsFromNavToBottom},_pausing:function(t){var r=this.options;if(!!r.behavior&&this["_pausing_"+r.behavior]!==n){this["_pausing_"+r.behavior].call(this,t);return}if(t!=="pause"&&t!=="resume"&&t!==null){this._debug("Invalid argument. Toggling pause value instead")}t=t&&(t==="pause"||t==="resume")?t:"toggle";switch(t){case"pause":r.state.isPaused=true;break;case"resume":r.state.isPaused=false;break;case"toggle":r.state.isPaused=!r.state.isPaused;break}this._debug("Paused",r.state.isPaused);return false},_setup:function(){var t=this.options;if(!!t.behavior&&this["_setup_"+t.behavior]!==n){this["_setup_"+t.behavior].call(this);return}this._binding("bind");return false},_showdonemsg:function(){var r=this.options;if(!!r.behavior&&this["_showdonemsg_"+r.behavior]!==n){this["_showdonemsg_"+r.behavior].call(this);return}r.loading.msg.find("img").hide().parent().find("div").html(r.loading.finishedMsg).animate({opacity:1},2e3,function(){t(this).parent().fadeOut(r.loading.speed)});r.errorCallback.call(t(r.contentSelector)[0],"done")},_validate:function(n){for(var r in n){if(r.indexOf&&r.indexOf("Selector")>-1&&t(n[r]).length===0){this._debug("Your "+r+" found no elements.");return false}}return true},bind:function(){this._binding("bind")},destroy:function(){this.options.state.isDestroyed=true;this.options.loading.finished();return this._error("destroy")},pause:function(){this._pausing("pause")},resume:function(){this._pausing("resume")},beginAjax:function(r){var i=this,s=r.path,o,u,a,f;if(r.direction=='reverse'){if(r.state.currPage>1)r.state.currPage--;else r.state.currPage=999999;}else r.state.currPage++;if(r.maxPage!=n&&r.state.currPage>r.maxPage){r.state.isBeyondMaxPage=true;this.destroy();return}o=t(r.contentSelector).is("table, tbody")?t("<tbody/>"):t("<div/>");u=typeof s==="function"?s(r.state.currPage):s.join(r.state.currPage);i._debug("heading into ajax",u);a=r.dataType==="html"||r.dataType==="json"?r.dataType:"html+callback";if(r.appendCallback&&r.dataType==="html"){a+="+callback"}switch(a){case"html+callback":i._debug("Using HTML via .load() method");o.load(u+" "+r.itemSelector,n,function(t){i._loadcallback(o,t,u)});break;case"html":i._debug("Using "+a.toUpperCase()+" via $.ajax() method");t.ajax({url:u,dataType:r.dataType,complete:function(t,n){f=typeof t.isResolved!=="undefined"?t.isResolved():n==="success"||n==="notmodified";if(f){i._loadcallback(o,t.responseText,u)}else{i._error("end")}}});break;case"json":i._debug("Using "+a.toUpperCase()+" via $.ajax() method");t.ajax({dataType:"json",type:"GET",url:u,success:function(e,t,s){f=typeof s.isResolved!=="undefined"?s.isResolved():t==="success"||t==="notmodified";if(r.appendCallback){if(r.template!==n){var a=r.template(e);o.append(a);if(f){i._loadcallback(o,a)}else{i._error("end")}}else{i._debug("template must be defined.");i._error("end")}}else{if(f){i._loadcallback(o,e,u)}else{i._error("end")}}},error:function(){i._debug("JSON ajax request failed.");i._error("end")}});break}},retrieve:function(r){r=r||null;var i=this,s=i.options;if(!!s.behavior&&this["retrieve_"+s.behavior]!==n){this["retrieve_"+s.behavior].call(this,r);return}if(s.state.isDestroyed){this._debug("Instance is destroyed");return false}s.state.isDuringAjax=true;s.loading.start.call(t(s.contentSelector)[0],s)},scroll:function(){var t=this.options,r=t.state;if(!!t.behavior&&this["scroll_"+t.behavior]!==n){this["scroll_"+t.behavior].call(this);return}if(r.isDuringAjax||r.isInvalidPage||r.isDone||r.isDestroyed||r.isPaused){return}if(!this._nearbottom()){return}this.retrieve()},toggle:function(){this._pausing()},unbind:function(){this._binding("unbind")},update:function(n){if(t.isPlainObject(n)){this.options=t.extend(true,this.options,n)}}};t.fn.infinitescroll=function(n,r){var i=typeof n;switch(i){case"string":var s=Array.prototype.slice.call(arguments,1);this.each(function(){var e=t.data(this,"infinitescroll");if(!e){return false}if(!t.isFunction(e[n])||n.charAt(0)==="_"){return false}e[n].apply(e,s)});break;case"object":this.each(function(){var e=t.data(this,"infinitescroll");if(e){e.update(n)}else{e=new t.infinitescroll(n,r,this);if(!e.failed){t.data(this,"infinitescroll",e)}}});break}return this};var r=t.event,i;r.special.smartscroll={setup:function(){t(this).bind("scroll",r.special.smartscroll.handler)},teardown:function(){t(this).unbind("scroll",r.special.smartscroll.handler)},handler:function(e,n){var r=this,s=arguments;e.type="smartscroll";if(i){clearTimeout(i)}i=setTimeout(function(){t(r).trigger("smartscroll",s)},n==="execAsap"?0:100)}};t.fn.smartscroll=function(e){return e?this.bind("smartscroll",e):this.trigger("smartscroll",["execAsap"])}})(window,jQuery)