forked from metafizzy/infinite-scroll
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jquery.infinitescroll.min.js
14 lines (11 loc) · 8.84 KB
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jquery.infinitescroll.min.js
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/*
--------------------------------
Infinite Scroll
--------------------------------
+ https://github.com/paulirish/infinite-scroll
+ version 2.0b2.120311
+ Copyright 2011 Paul Irish & Luke Shumard
+ Licensed under the MIT license
+ Documentation: http://infinite-scroll.com/
*/
(function(a,b,c){b.infinitescroll=function f(a,c,d){this.element=b(d);if(!this._create(a,c)){this.failed=true}};b.infinitescroll.defaults={loading:{finished:c,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:c},state:{isDuringAjax:false,isInvalidPage:false,isDestroyed:false,isDone:false,isPaused:false,currPage:1},callback:c,debug:false,behavior:c,binder:b(a),nextSelector:"div.navigation a:first",navSelector:"div.navigation",contentSelector:null,extraScrollPx:150,itemSelector:"div.post",animate:false,pathParse:c,dataType:"html",appendCallback:true,bufferPx:40,errorCallback:function(){},infid:0,pixelsFromNavToBottom:c,path:c};b.infinitescroll.prototype={_binding:function g(a){var b=this,d=b.options;d.v="2.0b2.111027";if(!!d.behavior&&this["_binding_"+d.behavior]!==c){this["_binding_"+d.behavior].call(this);return}if(a!=="bind"&&a!=="unbind"){this._debug("Binding value "+a+" not valid");return false}if(a=="unbind"){this.options.binder.unbind("smartscroll.infscr."+b.options.infid)}else{this.options.binder[a]("smartscroll.infscr."+b.options.infid,function(){b.scroll()})}this._debug("Binding",a)},_create:function h(a,d){var e=b.extend(true,{},b.infinitescroll.defaults,a);if(!this._validate(a)){return false}this.options=e;var f=b(e.nextSelector).attr("href");if(!f){this._debug("Navigation selector not found");return false}e.path=this._determinepath(f);e.contentSelector=e.contentSelector||this.element;e.loading.selector=e.loading.selector||e.contentSelector;e.loading.msg=b('<div id="infscr-loading"><img alt="Loading..." src="'+e.loading.img+'" /><div>'+e.loading.msgText+"</div></div>");(new Image).src=e.loading.img;e.pixelsFromNavToBottom=b(document).height()-b(e.navSelector).offset().top;e.loading.start=e.loading.start||function(){b(e.navSelector).hide();e.loading.msg.appendTo(e.loading.selector).show(e.loading.speed,function(){beginAjax(e)})};e.loading.finished=e.loading.finished||function(){e.loading.msg.fadeOut("normal")};e.callback=function(a,f){if(!!e.behavior&&a["_callback_"+e.behavior]!==c){a["_callback_"+e.behavior].call(b(e.contentSelector)[0],f)}if(d){d.call(b(e.contentSelector)[0],f,e)}};this._setup();return true},_debug:function i(){if(this.options&&this.options.debug){return a.console&&console.log.call(console,arguments)}},_determinepath:function j(a){var b=this.options;if(!!b.behavior&&this["_determinepath_"+b.behavior]!==c){this["_determinepath_"+b.behavior].call(this,a);return}if(!!b.pathParse){this._debug("pathParse manual");return b.pathParse(a,this.options.state.currPage+1)}else if(a.match(/^(.*?)\b2\b(.*?$)/)){a=a.match(/^(.*?)\b2\b(.*?$)/).slice(1)}else if(a.match(/^(.*?)2(.*?$)/)){if(a.match(/^(.*?page=)2(\/.*|$)/)){a=a.match(/^(.*?page=)2(\/.*|$)/).slice(1);return a}a=a.match(/^(.*?)2(.*?$)/).slice(1)}else{if(a.match(/^(.*?page=)1(\/.*|$)/)){a=a.match(/^(.*?page=)1(\/.*|$)/).slice(1);return a}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.");b.state.isInvalidPage=true}}this._debug("determinePath",a);return a},_error:function k(a){var b=this.options;if(!!b.behavior&&this["_error_"+b.behavior]!==c){this["_error_"+b.behavior].call(this,a);return}if(a!=="destroy"&&a!=="end"){a="unknown"}this._debug("Error",a);if(a=="end"){this._showdonemsg()}b.state.isDone=true;b.state.currPage=1;b.state.isPaused=false;this._binding("unbind")},_loadcallback:function l(d,e){var f=this.options,g=this.options.callback,h=f.state.isDone?"done":!f.appendCallback?"no-append":"append",i;if(!!f.behavior&&this["_loadcallback_"+f.behavior]!==c){this["_loadcallback_"+f.behavior].call(this,d,e);return}switch(h){case"done":this._showdonemsg();return false;break;case"no-append":if(f.dataType=="html"){e="<div>"+e+"</div>";e=b(e).find(f.itemSelector)}break;case"append":var j=d.children();if(j.length==0){return this._error("end")}i=document.createDocumentFragment();while(d[0].firstChild){i.appendChild(d[0].firstChild)}this._debug("contentSelector",b(f.contentSelector)[0]);b(f.contentSelector)[0].appendChild(i);e=j.get();break}f.loading.finished.call(b(f.contentSelector)[0],f);if(f.animate){var k=b(a).scrollTop()+b("#infscr-loading").height()+f.extraScrollPx+"px";b("html,body").animate({scrollTop:k},800,function(){f.state.isDuringAjax=false})}if(!f.animate)f.state.isDuringAjax=false;g(this,e)},_nearbottom:function m(){var d=this.options,e=0+b(document).height()-d.binder.scrollTop()-b(a).height();if(!!d.behavior&&this["_nearbottom_"+d.behavior]!==c){return this["_nearbottom_"+d.behavior].call(this)}this._debug("math:",e,d.pixelsFromNavToBottom);return e-d.bufferPx<d.pixelsFromNavToBottom},_pausing:function n(a){var b=this.options;if(!!b.behavior&&this["_pausing_"+b.behavior]!==c){this["_pausing_"+b.behavior].call(this,a);return}if(a!=="pause"&&a!=="resume"&&a!==null){this._debug("Invalid argument. Toggling pause value instead")}a=a&&(a=="pause"||a=="resume")?a:"toggle";switch(a){case"pause":b.state.isPaused=true;break;case"resume":b.state.isPaused=false;break;case"toggle":b.state.isPaused=!b.state.isPaused;break}this._debug("Paused",b.state.isPaused);return false},_setup:function o(){var a=this.options;if(!!a.behavior&&this["_setup_"+a.behavior]!==c){this["_setup_"+a.behavior].call(this);return}this._binding("bind");return false},_showdonemsg:function p(){var a=this.options;if(!!a.behavior&&this["_showdonemsg_"+a.behavior]!==c){this["_showdonemsg_"+a.behavior].call(this);return}a.loading.msg.find("img").hide().parent().find("div").html(a.loading.finishedMsg).animate({opacity:1},2e3,function(){b(this).parent().fadeOut("normal")});a.errorCallback.call(b(a.contentSelector)[0],"done")},_validate:function q(a){for(var c in a){if(c.indexOf&&c.indexOf("Selector")>-1&&b(a[c]).length===0){this._debug("Your "+c+" found no elements.");return false}}return true},bind:function r(){this._binding("bind")},destroy:function s(){this.options.state.isDestroyed=true;return this._error("destroy")},pause:function t(){this._pausing("pause")},resume:function u(){this._pausing("resume")},retrieve:function v(a){var d=this,e=d.options,f=e.path,g,h,i,j,k,a=a||null,l=!!a?a:e.state.currPage;beginAjax=function m(a){a.state.currPage++;d._debug("heading into ajax",f);g=b(a.contentSelector).is("table")?b("<tbody/>"):b("<div/>");i=f.join(a.state.currPage);j=a.dataType=="html"||a.dataType=="json"?a.dataType:"html+callback";if(a.appendCallback&&a.dataType=="html")j+="+callback";switch(j){case"html+callback":d._debug("Using HTML via .load() method");g.load(i+" "+a.itemSelector,null,function c(a){d._loadcallback(g,a)});break;case"html":case"json":d._debug("Using "+j.toUpperCase()+" via $.ajax() method");b.ajax({url:i,dataType:a.dataType,complete:function e(a,b){k=typeof a.isResolved!=="undefined"?a.isResolved():b==="success"||b==="notmodified";k?d._loadcallback(g,a.responseText):d._error("end")}});break}};if(!!e.behavior&&this["retrieve_"+e.behavior]!==c){this["retrieve_"+e.behavior].call(this,a);return}if(e.state.isDestroyed){this._debug("Instance is destroyed");return false}e.state.isDuringAjax=true;e.loading.start.call(b(e.contentSelector)[0],e)},scroll:function w(){var a=this.options,b=a.state;if(!!a.behavior&&this["scroll_"+a.behavior]!==c){this["scroll_"+a.behavior].call(this);return}if(b.isDuringAjax||b.isInvalidPage||b.isDone||b.isDestroyed||b.isPaused)return;if(!this._nearbottom())return;this.retrieve()},toggle:function x(){this._pausing()},unbind:function y(){this._binding("unbind")},update:function z(a){if(b.isPlainObject(a)){this.options=b.extend(true,this.options,a)}}};b.fn.infinitescroll=function A(a,c){var d=typeof a;switch(d){case"string":var e=Array.prototype.slice.call(arguments,1);this.each(function(){var c=b.data(this,"infinitescroll");if(!c){return false}if(!b.isFunction(c[a])||a.charAt(0)==="_"){return false}c[a].apply(c,e)});break;case"object":this.each(function(){var d=b.data(this,"infinitescroll");if(d){d.update(a)}else{d=new b.infinitescroll(a,c,this);if(!d.failed){b.data(this,"infinitescroll",d)}}});break}return this};var d=b.event,e;d.special.smartscroll={setup:function(){b(this).bind("scroll",d.special.smartscroll.handler)},teardown:function(){b(this).unbind("scroll",d.special.smartscroll.handler)},handler:function(a,c){var d=this,f=arguments;a.type="smartscroll";if(e){clearTimeout(e)}e=setTimeout(function(){b.event.handle.apply(d,f)},c==="execAsap"?0:100)}};b.fn.smartscroll=function(a){return a?this.bind("smartscroll",a):this.trigger("smartscroll",["execAsap"])}})(window,jQuery);