// Backbone.js 0.5.0
// (c) 2010 Jeremy Ashkenas, DocumentCloud Inc.
// Backbone may be freely distributed under the MIT license.
// For all details and documentation:
// http://documentcloud.github.com/backbone
(function(){var h=this,p=h.Backbone,e;e=typeof exports!=="undefined"?exports:h.Backbone={};e.VERSION="0.5.0";var f=h._;if(!f&&typeof require!=="undefined")f=require("underscore")._;var g=h.jQuery||h.Zepto;e.noConflict=function(){h.Backbone=p;return this};e.emulateHTTP=!1;e.emulateJSON=!1;e.Events={bind:function(a,b){var c=this._callbacks||(this._callbacks={});(c[a]||(c[a]=[])).push(b);return this},unbind:function(a,b){var c;if(a){if(c=this._callbacks)if(b){c=c[a];if(!c)return this;for(var d=0,e=c.length;d<
e;d++)if(b===c[d]){c[d]=null;break}}else c[a]=[]}else this._callbacks={};return this},trigger:function(a){var b,c,d,e,f=2;if(!(c=this._callbacks))return this;for(;f--;)if(b=f?a:"all",b=c[b])for(var g=0,h=b.length;g<h;g++)(d=b[g])?(e=f?Array.prototype.slice.call(arguments,1):arguments,d.apply(this,e)):(b.splice(g,1),g--,h--);return this}};e.Model=function(a,b){var c;a||(a={});if(c=this.defaults)f.isFunction(c)&&(c=c()),a=f.extend({},c,a);this.attributes={};this._escapedAttributes={};this.cid=f.uniqueId("c");
this.set(a,{silent:!0});this._changed=!1;this._previousAttributes=f.clone(this.attributes);if(b&&b.collection)this.collection=b.collection;this.initialize.apply(this,arguments)};f.extend(e.Model.prototype,e.Events,{_previousAttributes:null,_changed:!1,idAttribute:"id",initialize:function(){},toJSON:function(){return f.clone(this.attributes)},get:function(a){return this.attributes[a]},escape:function(a){var b;if(b=this._escapedAttributes[a])return b;b=this.attributes[a];return this._escapedAttributes[a]=
(b==null?"":""+b).replace(/&(?!\w+;|#\d+;|#x[\da-f]+;)/gi,"&amp;").replace(/</g,"&lt;").replace(/>/g,"&gt;").replace(/"/g,"&quot;").replace(/'/g,"&#x27").replace(/\//g,"&#x2F;")},has:function(a){return this.attributes[a]!=null},set:function(a,b){b||(b={});if(!a)return this;if(a.attributes)a=a.attributes;var c=this.attributes,d=this._escapedAttributes;if(!b.silent&&this.validate&&!this._performValidation(a,b))return!1;if(this.idAttribute in a)this.id=a[this.idAttribute];var e=this._changing;this._changing=
!0;for(var g in a){var h=a[g];if(!f.isEqual(c[g],h))c[g]=h,delete d[g],this._changed=!0,b.silent||this.trigger("change:"+g,this,h,b)}!e&&!b.silent&&this._changed&&this.change(b);this._changing=!1;return this},unset:function(a,b){if(!(a in this.attributes))return this;b||(b={});var c={};c[a]=void 0;if(!b.silent&&this.validate&&!this._performValidation(c,b))return!1;delete this.attributes[a];delete this._escapedAttributes[a];a==this.idAttribute&&delete this.id;this._changed=!0;b.silent||(this.trigger("change:"+
a,this,void 0,b),this.change(b));return this},clear:function(a){a||(a={});var b,c=this.attributes,d={};for(b in c)d[b]=void 0;if(!a.silent&&this.validate&&!this._performValidation(d,a))return!1;this.attributes={};this._escapedAttributes={};this._changed=!0;if(!a.silent){for(b in c)this.trigger("change:"+b,this,void 0,a);this.change(a)}return this},fetch:function(a){a||(a={});var b=this,c=a.success;a.success=function(d,e,f){if(!b.set(b.parse(d,f),a))return!1;c&&c(b,d)};a.error=i(a.error,b,a);return(this.sync||
e.sync).call(this,"read",this,a)},save:function(a,b){b||(b={});if(a&&!this.set(a,b))return!1;var c=this,d=b.success;b.success=function(a,e,f){if(!c.set(c.parse(a,f),b))return!1;d&&d(c,a,f)};b.error=i(b.error,c,b);var f=this.isNew()?"create":"update";return(this.sync||e.sync).call(this,f,this,b)},destroy:function(a){a||(a={});if(this.isNew())return this.trigger("destroy",this,this.collection,a);var b=this,c=a.success;a.success=function(d){b.trigger("destroy",b,b.collection,a);c&&c(b,d)};a.error=i(a.error,
b,a);return(this.sync||e.sync).call(this,"delete",this,a)},url:function(){var a=j(this.collection)||this.urlRoot||k();if(this.isNew())return a;return a+(a.charAt(a.length-1)=="/"?"":"/")+encodeURIComponent(this.id)},parse:function(a){return a},clone:function(){return new this.constructor(this)},isNew:function(){return this.id==null},change:function(a){this.trigger("change",this,a);this._previousAttributes=f.clone(this.attributes);this._changed=!1},hasChanged:function(a){if(a)return this._previousAttributes[a]!=
this.attributes[a];return this._changed},changedAttributes:function(a){a||(a=this.attributes);var b=this._previousAttributes,c=!1,d;for(d in a)f.isEqual(b[d],a[d])||(c=c||{},c[d]=a[d]);return c},previous:function(a){if(!a||!this._previousAttributes)return null;return this._previousAttributes[a]},previousAttributes:function(){return f.clone(this._previousAttributes)},_performValidation:function(a,b){var c=this.validate(a);if(c)return b.error?b.error(this,c,b):this.trigger("error",this,c,b),!1;return!0}});
e.Collection=function(a,b){b||(b={});if(b.comparator)this.comparator=b.comparator;f.bindAll(this,"_onModelEvent","_removeReference");this._reset();a&&this.reset(a,{silent:!0});this.initialize.apply(this,arguments)};f.extend(e.Collection.prototype,e.Events,{model:e.Model,initialize:function(){},toJSON:function(){return this.map(function(a){return a.toJSON()})},add:function(a,b){if(f.isArray(a))for(var c=0,d=a.length;c<d;c++)this._add(a[c],b);else this._add(a,b);return this},remove:function(a,b){if(f.isArray(a))for(var c=
0,d=a.length;c<d;c++)this._remove(a[c],b);else this._remove(a,b);return this},get:function(a){if(a==null)return null;return this._byId[a.id!=null?a.id:a]},getByCid:function(a){return a&&this._byCid[a.cid||a]},at:function(a){return this.models[a]},sort:function(a){a||(a={});if(!this.comparator)throw Error("Cannot sort a set without a comparator");this.models=this.sortBy(this.comparator);a.silent||this.trigger("reset",this,a);return this},pluck:function(a){return f.map(this.models,function(b){return b.get(a)})},
reset:function(a,b){a||(a=[]);b||(b={});this.each(this._removeReference);this._reset();this.add(a,{silent:!0});b.silent||this.trigger("reset",this,b);return this},fetch:function(a){a||(a={});var b=this,c=a.success;a.success=function(d,f,e){b[a.add?"add":"reset"](b.parse(d,e),a);c&&c(b,d)};a.error=i(a.error,b,a);return(this.sync||e.sync).call(this,"read",this,a)},create:function(a,b){var c=this;b||(b={});a=this._prepareModel(a,b);if(!a)return!1;var d=b.success;b.success=function(a,e,f){c.add(a,b);
d&&d(a,e,f)};a.save(null,b);return a},parse:function(a){return a},chain:function(){return f(this.models).chain()},_reset:function(){this.length=0;this.models=[];this._byId={};this._byCid={}},_prepareModel:function(a,b){if(a instanceof e.Model){if(!a.collection)a.collection=this}else{var c=a;a=new this.model(c,{collection:this});a.validate&&!a._performValidation(c,b)&&(a=!1)}return a},_add:function(a,b){b||(b={});a=this._prepareModel(a,b);if(!a)return!1;var c=this.getByCid(a)||this.get(a);if(c)throw Error(["Can't add the same model to a set twice",
c.id]);this._byId[a.id]=a;this._byCid[a.cid]=a;this.models.splice(b.at!=null?b.at:this.comparator?this.sortedIndex(a,this.comparator):this.length,0,a);a.bind("all",this._onModelEvent);this.length++;b.silent||a.trigger("add",a,this,b);return a},_remove:function(a,b){b||(b={});a=this.getByCid(a)||this.get(a);if(!a)return null;delete this._byId[a.id];delete this._byCid[a.cid];this.models.splice(this.indexOf(a),1);this.length--;b.silent||a.trigger("remove",a,this,b);this._removeReference(a);return a},
_removeReference:function(a){this==a.collection&&delete a.collection;a.unbind("all",this._onModelEvent)},_onModelEvent:function(a,b,c,d){(a=="add"||a=="remove")&&c!=this||(a=="destroy"&&this._remove(b,d),b&&a==="change:"+b.idAttribute&&(delete this._byId[b.previous(b.idAttribute)],this._byId[b.id]=b),this.trigger.apply(this,arguments))}});f.each(["forEach","each","map","reduce","reduceRight","find","detect","filter","select","reject","every","all","some","any","include","invoke","max","min","sortBy",
"sortedIndex","toArray","size","first","rest","last","without","indexOf","lastIndexOf","isEmpty"],function(a){e.Collection.prototype[a]=function(){return f[a].apply(f,[this.models].concat(f.toArray(arguments)))}});e.Router=function(a){a||(a={});if(a.routes)this.routes=a.routes;this._bindRoutes();this.initialize.apply(this,arguments)};var q=/:([\w\d]+)/g,r=/\*([\w\d]+)/g,s=/[-[\]{}()+?.,\\^$|#\s]/g;f.extend(e.Router.prototype,e.Events,{initialize:function(){},route:function(a,b,c){e.history||(e.history=
new e.History);f.isRegExp(a)||(a=this._routeToRegExp(a));e.history.route(a,f.bind(function(d){d=this._extractParameters(a,d);c.apply(this,d);this.trigger.apply(this,["route:"+b].concat(d))},this))},navigate:function(a,b){e.history.navigate(a,b)},_bindRoutes:function(){if(this.routes){var a=[],b;for(b in this.routes)a.unshift([b,this.routes[b]]);b=0;for(var c=a.length;b<c;b++)this.route(a[b][0],a[b][1],this[a[b][1]])}},_routeToRegExp:function(a){a=a.replace(s,"\\$&").replace(q,"([^/]*)").replace(r,
"(.*?)");return RegExp("^"+a+"$")},_extractParameters:function(a,b){return a.exec(b).slice(1)}});e.History=function(){this.handlers=[];f.bindAll(this,"checkUrl")};var l=/^#*!?/,t=/msie [\w.]+/,m=!1;f.extend(e.History.prototype,{interval:50,getFragment:function(a,b){if(a==null)if(this._hasPushState||b){a=window.location.pathname;var c=window.location.search;c&&(a+=c);a.indexOf(this.options.root)==0&&(a=a.substr(this.options.root.length))}else a=window.location.hash;return a.replace(l,"")},start:function(a){if(m)throw Error("Backbone.history has already been started");
this.options=f.extend({},{root:"/"},this.options,a);this._wantsPushState=!!this.options.pushState;this._hasPushState=!(!this.options.pushState||!window.history||!window.history.pushState);a=this.getFragment();var b=document.documentMode;if(b=t.exec(navigator.userAgent.toLowerCase())&&(!b||b<=7))this.iframe=g('<iframe src="javascript:0" tabindex="-1" />').hide().appendTo("body")[0].contentWindow,this.navigate(a);this._hasPushState?g(window).bind("popstate",this.checkUrl):"onhashchange"in window&&!b?
g(window).bind("hashchange",this.checkUrl):setInterval(this.checkUrl,this.interval);this.fragment=a;m=!0;a=this.loadUrl()||this.loadUrl(window.location.hash);b=window.location.pathname==this.options.root;if(this._wantsPushState&&!this._hasPushState&&!b)this.fragment=this.getFragment(null,!0),window.location=this.options.root+"#"+this.fragment;else if(this._wantsPushState&&this._hasPushState&&b&&window.location.hash)this.navigate(window.location.hash);else return a},route:function(a,b){this.handlers.unshift({route:a,
callback:b})},checkUrl:function(){var a=this.getFragment();a==this.fragment&&this.iframe&&(a=this.getFragment(this.iframe.location.hash));if(a==this.fragment||a==decodeURIComponent(this.fragment))return!1;this.iframe&&this.navigate(a);this.loadUrl()||this.loadUrl(window.location.hash)},loadUrl:function(a){var b=this.fragment=this.getFragment(a);return f.any(this.handlers,function(a){if(a.route.test(b))return a.callback(b),!0})},navigate:function(a,b){a=(a||"").replace(l,"");if(!(this.fragment==a||
this.fragment==decodeURIComponent(a))){if(this._hasPushState){var c=window.location;a.indexOf(this.options.root)!=0&&(a=this.options.root+a);this.fragment=a;window.history.pushState({},document.title,c.protocol+"//"+c.host+a)}else if(window.location.hash=this.fragment=a,this.iframe&&a!=this.getFragment(this.iframe.location.hash))this.iframe.document.open().close(),this.iframe.location.hash=a;b&&this.loadUrl(a)}}});e.View=function(a){this.cid=f.uniqueId("view");this._configure(a||{});this._ensureElement();
this.delegateEvents();this.initialize.apply(this,arguments)};var u=/^(\S+)\s*(.*)$/,n=["model","collection","el","id","attributes","className","tagName"];f.extend(e.View.prototype,e.Events,{tagName:"div",$:function(a){return g(a,this.el)},initialize:function(){},render:function(){return this},remove:function(){g(this.el).remove();return this},make:function(a,b,c){a=document.createElement(a);b&&g(a).attr(b);c&&g(a).html(c);return a},delegateEvents:function(a){if(a||(a=this.events))for(var b in g(this.el).unbind(".delegateEvents"+
this.cid),a){var c=this[a[b]];if(!c)throw Error('Event "'+a[b]+'" does not exist');var d=b.match(u),e=d[1];d=d[2];c=f.bind(c,this);e+=".delegateEvents"+this.cid;d===""?g(this.el).bind(e,c):g(this.el).delegate(d,e,c)}},_configure:function(a){this.options&&(a=f.extend({},this.options,a));for(var b=0,c=n.length;b<c;b++){var d=n[b];a[d]&&(this[d]=a[d])}this.options=a},_ensureElement:function(){if(this.el){if(f.isString(this.el))this.el=g(this.el).get(0)}else{var a=this.attributes||{};if(this.id)a.id=
this.id;if(this.className)a["class"]=this.className;this.el=this.make(this.tagName,a)}}});e.Model.extend=e.Collection.extend=e.Router.extend=e.View.extend=function(a,b){var c=v(this,a,b);c.extend=this.extend;return c};var w={create:"POST",update:"PUT","delete":"DELETE",read:"GET"};e.sync=function(a,b,c){var d=w[a];c=f.extend({type:d,dataType:"json",processData:!1},c);if(!c.url)c.url=j(b)||k();if(!c.data&&b&&(a=="create"||a=="update"))c.contentType="application/json",c.data=JSON.stringify(b.toJSON());
if(e.emulateJSON)c.contentType="application/x-www-form-urlencoded",c.processData=!0,c.data=c.data?{model:c.data}:{};if(e.emulateHTTP&&(d==="PUT"||d==="DELETE")){if(e.emulateJSON)c.data._method=d;c.type="POST";c.beforeSend=function(a){a.setRequestHeader("X-HTTP-Method-Override",d)}}return g.ajax(c)};var o=function(){},v=function(a,b,c){var d;d=b&&b.hasOwnProperty("constructor")?b.constructor:function(){return a.apply(this,arguments)};f.extend(d,a);o.prototype=a.prototype;d.prototype=new o;b&&f.extend(d.prototype,
b);c&&f.extend(d,c);d.prototype.constructor=d;d.__super__=a.prototype;return d},j=function(a){if(!a||!a.url)return null;return f.isFunction(a.url)?a.url():a.url},k=function(){throw Error('A "url" property or function must be specified');},i=function(a,b,c){return function(d){a?a(b,d,c):b.trigger("error",b,d,c)}}}).call(this);
