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"+"ui-state-disabled"),this.bindings.unbind(this.eventNamespace),this.hoverable.removeClass("ui-state-hover"),this.focusable.removeClass("ui-state-focus")},_destroy:t.noop,widget:function(){return this.element},option:function(e,i){var s,n,o,a=e;if(0===arguments.length)return t.widget.extend({},this.options);if("string"==typeof e)if(a={},s=e.split("."),e=s.shift(),s.length){for(n=a[e]=t.widget.extend({},this.options[e]),o=0;s.length-1>o;o++)n[s[o]]=n[s[o]]||{},n=n[s[o]];if(e=s.pop(),1===arguments.length)return void 0===n[e]?null:n[e];n[e]=i}else{if(1===arguments.length)return void 0===this.options[e]?null:this.options[e];a[e]=i}return this._setOptions(a),this},_setOptions:function(t){var e;for(e in t)this._setOption(e,t[e]);return this},_setOption:function(t,e){return this.options[t]=e,"disabled"===t&&(this.widget().toggleClass(this.widgetFullName+"-disabled",!!e),e&&(this.hoverable.removeClass("ui-state-hover"),this.focusable.removeClass("ui-state-focus"))),this},enable:function(){return this._setOptions({disabled:!1})},disable:function(){return this._setOptions({disabled:!0})},_on:function(e,i,s){var n,o=this;"boolean"!=typeof e&&(s=i,i=e,e=!1),s?(i=n=t(i),this.bindings=this.bindings.add(i)):(s=i,i=this.element,n=this.widget()),t.each(s,function(s,a){function r(){return e||o.options.disabled!==!0&&!t(this).hasClass("ui-state-disabled")?("string"==typeof a?o[a]:a).apply(o,arguments):void 0}"string"!=typeof a&&(r.guid=a.guid=a.guid||r.guid||t.guid++);var l=s.match(/^([\w:-]*)\s*(.*)$/),h=l[1]+o.eventNamespace,c=l[2];c?n.delegate(c,h,r):i.bind(h,r)})},_off:function(e,i){i=(i||"").split(" ").join(this.eventNamespace+" ")+this.eventNamespace,e.unbind(i).undelegate(i),this.bindings=t(this.bindings.not(e).get()),this.focusable=t(this.focusable.not(e).get()),this.hoverable=t(this.hoverable.not(e).get())},_delay:function(t,e){function i(){return("string"==typeof t?s[t]:t).apply(s,arguments)}var s=this;return setTimeout(i,e||0)},_hoverable:function(e){this.hoverable=this.hoverable.add(e),this._on(e,{mouseenter:function(e){t(e.currentTarget).addClass("ui-state-hover")},mouseleave:function(e){t(e.currentTarget).removeClass("ui-state-hover")}})},_focusable:function(e){this.focusable=this.focusable.add(e),this._on(e,{focusin:function(e){t(e.currentTarget).addClass("ui-state-focus")},focusout:function(e){t(e.currentTarget).removeClass("ui-state-focus")}})},_trigger:function(e,i,s){var n,o,a=this.options[e];if(s=s||{},i=t.Event(i),i.type=(e===this.widgetEventPrefix?e:this.widgetEventPrefix+e).toLowerCase(),i.target=this.element[0],o=i.originalEvent)for(n in o)n in i||(i[n]=o[n]);return this.element.trigger(i,s),!(t.isFunction(a)&&a.apply(this.element[0],[i].concat(s))===!1||i.isDefaultPrevented())}},t.each({show:"fadeIn",hide:"fadeOut"},function(e,i){t.Widget.prototype["_"+e]=function(s,n,o){"string"==typeof n&&(n={effect:n});var a,r=n?n===!0||"number"==typeof n?i:n.effect||i:e;n=n||{},"number"==typeof n&&(n={duration:n}),a=!t.isEmptyObject(n),n.complete=o,n.delay&&s.delay(n.delay),a&&t.effects&&t.effects.effect[r]?s[e](n):r!==e&&s[r]?s[r](n.duration,n.easing,o):s.queue(function(i){t(this)[e](),o&&o.call(s[0]),i()})}}),t.widget;var o=!1;t(document).mouseup(function(){o=!1}),t.widget("ui.mouse",{version:"1.11.4",options:{cancel:"input,textarea,button,select,option",distance:1,delay:0},_mouseInit:function(){var e=this;this.element.bind("mousedown."+this.widgetName,function(t){return e._mouseDown(t)}).bind("click."+this.widgetName,function(i){return!0===t.data(i.target,e.widgetName+".preventClickEvent")?(t.removeData(i.target,e.widgetName+".preventClickEvent"),i.stopImmediatePropagation(),!1):void 0}),this.started=!1},_mouseDestroy:function(){this.element.unbind("."+this.widgetName),this._mouseMoveDelegate&&this.document.unbind("mousemove."+this.widgetName,this._mouseMoveDelegate).unbind("mouseup."+this.widgetName,this._mouseUpDelegate)},_mouseDown:function(e){if(!o){this._mouseMoved=!1,this._mouseStarted&&this._mouseUp(e),this._mouseDownEvent=e;var i=this,s=1===e.which,n="string"==typeof this.options.cancel&&e.target.nodeName?t(e.target).closest(this.options.cancel).length:!1;return s&&!n&&this._mouseCapture(e)?(this.mouseDelayMet=!this.options.delay,this.mouseDelayMet||(this._mouseDelayTimer=setTimeout(function(){i.mouseDelayMet=!0},this.options.delay)),this._mouseDistanceMet(e)&&this._mouseDelayMet(e)&&(this._mouseStarted=this._mouseStart(e)!==!1,!this._mouseStarted)?(e.preventDefault(),!0):(!0===t.data(e.target,this.widgetName+".preventClickEvent")&&t.removeData(e.target,this.widgetName+".preventClickEvent"),this._mouseMoveDelegate=function(t){return i._mouseMove(t)},this._mouseUpDelegate=function(t){return i._mouseUp(t)},this.document.bind("mousemove."+this.widgetName,this._mouseMoveDelegate).bind("mouseup."+this.widgetName,this._mouseUpDelegate),e.preventDefault(),o=!0,!0)):!0}},_mouseMove:function(e){if(this._mouseMoved){if(t.ui.ie&&(!document.documentMode||9>document.documentMode)&&!e.button)return this._mouseUp(e);if(!e.which)return this._mouseUp(e)}return(e.which||e.button)&&(this._mouseMoved=!0),this._mouseStarted?(this._mouseDrag(e),e.preventDefault()):(this._mouseDistanceMet(e)&&this._mouseDelayMet(e)&&(this._mouseStarted=this._mouseStart(this._mouseDownEvent,e)!==!1,this._mouseStarted?this._mouseDrag(e):this._mouseUp(e)),!this._mouseStarted)},_mouseUp:function(e){return this.document.unbind("mousemove."+this.widgetName,this._mouseMoveDelegate).unbind("mouseup."+this.widgetName,this._mouseUpDelegate),this._mouseStarted&&(this._mouseStarted=!1,e.target===this._mouseDownEvent.target&&t.data(e.target,this.widgetName+".preventClickEvent",!0),this._mouseStop(e)),o=!1,!1},_mouseDistanceMet:function(t){return Math.max(Math.abs(this._mouseDownEvent.pageX-t.pageX),Math.abs(this._mouseDownEvent.pageY-t.pageY))>=this.options.distance},_mouseDelayMet:function(){return this.mouseDelayMet},_mouseStart:function(){},_mouseDrag:function(){},_mouseStop:function(){},_mouseCapture:function(){return!0}}),t.widget("ui.slider",t.ui.mouse,{version:"1.11.4",widgetEventPrefix:"slide",options:{animate:!1,distance:0,max:100,min:0,orientation:"horizontal",range:!1,step:1,value:0,values:null,change:null,slide:null,start:null,stop:null},numPages:5,_create:function(){this._keySliding=!1,this._mouseSliding=!1,this._animateOff=!0,this._handleIndex=null,this._detectOrientation(),this._mouseInit(),this._calculateNewMax(),this.element.addClass("ui-slider ui-slider-"+this.orientation+" ui-widget"+" ui-widget-content"+" ui-corner-all"),this._refresh(),this._setOption("disabled",this.options.disabled),this._animateOff=!1},_refresh:function(){this._createRange(),this._createHandles(),this._setupEvents(),this._refreshValue()},_createHandles:function(){var e,i,s=this.options,n=this.element.find(".ui-slider-handle").addClass("ui-state-default ui-corner-all"),o="",a=[];for(i=s.values&&s.values.length||1,n.length>i&&(n.slice(i).remove(),n=n.slice(0,i)),e=n.length;i>e;e++)a.push(o);this.handles=n.add(t(a.join("")).appendTo(this.element)),this.handle=this.handles.eq(0),this.handles.each(function(e){t(this).data("ui-slider-handle-index",e)})},_createRange:function(){var e=this.options,i="";e.range?(e.range===!0&&(e.values?e.values.length&&2!==e.values.length?e.values=[e.values[0],e.values[0]]:t.isArray(e.values)&&(e.values=e.values.slice(0)):e.values=[this._valueMin(),this._valueMin()]),this.range&&this.range.length?this.range.removeClass("ui-slider-range-min ui-slider-range-max").css({left:"",bottom:""}):(this.range=t("
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i=Math.abs(s-c.values(e));(n>i||n===i&&(e===c._lastChangedValue||c.values(e)===u.min))&&(n=i,o=t(this),a=e)}),r=this._start(e,a),r===!1?!1:(this._mouseSliding=!0,this._handleIndex=a,o.addClass("ui-state-active").focus(),l=o.offset(),h=!t(e.target).parents().addBack().is(".ui-slider-handle"),this._clickOffset=h?{left:0,top:0}:{left:e.pageX-l.left-o.width()/2,top:e.pageY-l.top-o.height()/2-(parseInt(o.css("borderTopWidth"),10)||0)-(parseInt(o.css("borderBottomWidth"),10)||0)+(parseInt(o.css("marginTop"),10)||0)},this.handles.hasClass("ui-state-hover")||this._slide(e,a,s),this._animateOff=!0,!0))},_mouseStart:function(){return!0},_mouseDrag:function(t){var e={x:t.pageX,y:t.pageY},i=this._normValueFromMouse(e);return this._slide(t,this._handleIndex,i),!1},_mouseStop:function(t){return this.handles.removeClass("ui-state-active"),this._mouseSliding=!1,this._stop(t,this._handleIndex),this._change(t,this._handleIndex),this._handleIndex=null,this._clickOffset=null,this._animateOff=!1,!1},_detectOrientation:function(){this.orientation="vertical"===this.options.orientation?"vertical":"horizontal"},_normValueFromMouse:function(t){var e,i,s,n,o;return"horizontal"===this.orientation?(e=this.elementSize.width,i=t.x-this.elementOffset.left-(this._clickOffset?this._clickOffset.left:0)):(e=this.elementSize.height,i=t.y-this.elementOffset.top-(this._clickOffset?this._clickOffset.top:0)),s=i/e,s>1&&(s=1),0>s&&(s=0),"vertical"===this.orientation&&(s=1-s),n=this._valueMax()-this._valueMin(),o=this._valueMin()+s*n,this._trimAlignValue(o)},_start:function(t,e){var i={handle:this.handles[e],value:this.value()};return this.options.values&&this.options.values.length&&(i.value=this.values(e),i.values=this.values()),this._trigger("start",t,i)},_slide:function(t,e,i){var s,n,o;this.options.values&&this.options.values.length?(s=this.values(e?0:1),2===this.options.values.length&&this.options.range===!0&&(0===e&&i>s||1===e&&s>i)&&(i=s),i!==this.values(e)&&(n=this.values(),n[e]=i,o=this._trigger("slide",t,{handle:this.handles[e],value:i,values:n}),s=this.values(e?0:1),o!==!1&&this.values(e,i))):i!==this.value()&&(o=this._trigger("slide",t,{handle:this.handles[e],value:i}),o!==!1&&this.value(i))},_stop:function(t,e){var i={handle:this.handles[e],value:this.value()};this.options.values&&this.options.values.length&&(i.value=this.values(e),i.values=this.values()),this._trigger("stop",t,i)},_change:function(t,e){if(!this._keySliding&&!this._mouseSliding){var i={handle:this.handles[e],value:this.value()};this.options.values&&this.options.values.length&&(i.value=this.values(e),i.values=this.values()),this._lastChangedValue=e,this._trigger("change",t,i)}},value:function(t){return arguments.length?(this.options.value=this._trimAlignValue(t),this._refreshValue(),this._change(null,0),void 0):this._value()},values:function(e,i){var s,n,o;if(arguments.length>1)return this.options.values[e]=this._trimAlignValue(i),this._refreshValue(),this._change(null,e),void 0;if(!arguments.length)return this._values();if(!t.isArray(arguments[0]))return this.options.values&&this.options.values.length?this._values(e):this.value();for(s=this.options.values,n=arguments[0],o=0;s.length>o;o+=1)s[o]=this._trimAlignValue(n[o]),this._change(null,o);this._refreshValue()},_setOption:function(e,i){var s,n=0;switch("range"===e&&this.options.range===!0&&("min"===i?(this.options.value=this._values(0),this.options.values=null):"max"===i&&(this.options.value=this._values(this.options.values.length-1),this.options.values=null)),t.isArray(this.options.values)&&(n=this.options.values.length),"disabled"===e&&this.element.toggleClass("ui-state-disabled",!!i),this._super(e,i),e){case"orientation":this._detectOrientation(),this.element.removeClass("ui-slider-horizontal ui-slider-vertical").addClass("ui-slider-"+this.orientation),this._refreshValue(),this.handles.css("horizontal"===i?"bottom":"left","");break;case"value":this._animateOff=!0,this._refreshValue(),this._change(null,0),this._animateOff=!1;break;case"values":for(this._animateOff=!0,this._refreshValue(),s=0;n>s;s+=1)this._change(null,s);this._animateOff=!1;break;case"step":case"min":case"max":this._animateOff=!0,this._calculateNewMax(),this._refreshValue(),this._animateOff=!1;break;case"range":this._animateOff=!0,this._refresh(),this._animateOff=!1}},_value:function(){var t=this.options.value;return t=this._trimAlignValue(t)},_values:function(t){var e,i,s;if(arguments.length)return e=this.options.values[t],e=this._trimAlignValue(e);if(this.options.values&&this.options.values.length){for(i=this.options.values.slice(),s=0;i.length>s;s+=1)i[s]=this._trimAlignValue(i[s]);return i}return[]},_trimAlignValue:function(t){if(this._valueMin()>=t)return this._valueMin();if(t>=this._valueMax())return this._valueMax();var e=this.options.step>0?this.options.step:1,i=(t-this._valueMin())%e,s=t-i;return 2*Math.abs(i)>=e&&(s+=i>0?e:-e),parseFloat(s.toFixed(5))},_calculateNewMax:function(){var t=this.options.max,e=this._valueMin(),i=this.options.step,s=Math.floor(+(t-e).toFixed(this._precision())/i)*i;t=s+e,this.max=parseFloat(t.toFixed(this._precision()))},_precision:function(){var t=this._precisionOf(this.options.step);return null!==this.options.min&&(t=Math.max(t,this._precisionOf(this.options.min))),t},_precisionOf:function(t){var e=""+t,i=e.indexOf(".");return-1===i?0:e.length-i-1},_valueMin:function(){return this.options.min},_valueMax:function(){return this.max},_refreshValue:function(){var e,i,s,n,o,a=this.options.range,r=this.options,l=this,h=this._animateOff?!1:r.animate,c={};this.options.values&&this.options.values.length?this.handles.each(function(s){i=100*((l.values(s)-l._valueMin())/(l._valueMax()-l._valueMin())),c["horizontal"===l.orientation?"left":"bottom"]=i+"%",t(this).stop(1,1)[h?"animate":"css"](c,r.animate),l.options.range===!0&&("horizontal"===l.orientation?(0===s&&l.range.stop(1,1)[h?"animate":"css"]({left:i+"%"},r.animate),1===s&&l.range[h?"animate":"css"]({width:i-e+"%"},{queue:!1,duration:r.animate})):(0===s&&l.range.stop(1,1)[h?"animate":"css"]({bottom:i+"%"},r.animate),1===s&&l.range[h?"animate":"css"]({height:i-e+"%"},{queue:!1,duration:r.animate}))),e=i}):(s=this.value(),n=this._valueMin(),o=this._valueMax(),i=o!==n?100*((s-n)/(o-n)):0,c["horizontal"===this.orientation?"left":"bottom"]=i+"%",this.handle.stop(1,1)[h?"animate":"css"](c,r.animate),"min"===a&&"horizontal"===this.orientation&&this.range.stop(1,1)[h?"animate":"css"]({width:i+"%"},r.animate),"max"===a&&"horizontal"===this.orientation&&this.range[h?"animate":"css"]({width:100-i+"%"},{queue:!1,duration:r.animate}),"min"===a&&"vertical"===this.orientation&&this.range.stop(1,1)[h?"animate":"css"]({height:i+"%"},r.animate),"max"===a&&"vertical"===this.orientation&&this.range[h?"animate":"css"]({height:100-i+"%"},{queue:!1,duration:r.animate}))},_handleEvents:{keydown:function(e){var i,s,n,o,a=t(e.target).data("ui-slider-handle-index");switch(e.keyCode){case t.ui.keyCode.HOME:case t.ui.keyCode.END:case t.ui.keyCode.PAGE_UP:case t.ui.keyCode.PAGE_DOWN:case t.ui.keyCode.UP:case t.ui.keyCode.RIGHT:case t.ui.keyCode.DOWN:case t.ui.keyCode.LEFT:if(e.preventDefault(),!this._keySliding&&(this._keySliding=!0,t(e.target).addClass("ui-state-active"),i=this._start(e,a),i===!1))return}switch(o=this.options.step,s=n=this.options.values&&this.options.values.length?this.values(a):this.value(),e.keyCode){case t.ui.keyCode.HOME:n=this._valueMin();break;case t.ui.keyCode.END:n=this._valueMax();break;case t.ui.keyCode.PAGE_UP:n=this._trimAlignValue(s+(this._valueMax()-this._valueMin())/this.numPages);break;case t.ui.keyCode.PAGE_DOWN:n=this._trimAlignValue(s-(this._valueMax()-this._valueMin())/this.numPages);break;case t.ui.keyCode.UP:case t.ui.keyCode.RIGHT:if(s===this._valueMax())return;n=this._trimAlignValue(s+o);break;case t.ui.keyCode.DOWN:case t.ui.keyCode.LEFT:if(s===this._valueMin())return;n=this._trimAlignValue(s-o)}this._slide(e,a,n)},keyup:function(e){var i=t(e.target).data("ui-slider-handle-index");this._keySliding&&(this._keySliding=!1,this._stop(e,i),this._change(e,i),t(e.target).removeClass("ui-state-active"))}}});var a="ui-effects-",r=t;t.effects={effect:{}},function(t,e){function i(t,e,i){var s=u[e.type]||{};return null==t?i||!e.def?null:e.def:(t=s.floor?~~t:parseFloat(t),isNaN(t)?e.def:s.mod?(t+s.mod)%s.mod:0>t?0:t>s.max?s.max:t)}function s(i){var s=h(),n=s._rgba=[];return i=i.toLowerCase(),f(l,function(t,o){var a,r=o.re.exec(i),l=r&&o.parse(r),h=o.space||"rgba";return l?(a=s[h](l),s[c[h].cache]=a[c[h].cache],n=s._rgba=a._rgba,!1):e}),n.length?("0,0,0,0"===n.join()&&t.extend(n,o.transparent),s):o[i]}function n(t,e,i){return i=(i+1)%1,1>6*i?t+6*(e-t)*i:1>2*i?e:2>3*i?t+6*(e-t)*(2/3-i):t}var o,a="backgroundColor borderBottomColor borderLeftColor borderRightColor borderTopColor color columnRuleColor outlineColor 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If the array has already // been sorted, you have the option of using a faster algorithm. // Aliased as `unique`. _.uniq = _.unique = function(array, isSorted, iterator, context) { var initial = iterator ? _.map(array, iterator, context) : array; var results = []; var seen = []; each(initial, function(value, index) { if (isSorted ? 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Pass either a single array of `[key, value]` // pairs, or two parallel arrays of the same length -- one of keys, and one of // the corresponding values. _.object = function(list, values) { var result = {}; for (var i = 0, l = list.length; i < l; i++) { if (values) { result[list[i]] = values[i]; } else { result[list[i][0]] = list[i][1]; } } return result; }; // If the browser doesn't supply us with indexOf (I'm looking at you, **MSIE**), // we need this function. Return the position of the first occurrence of an // item in an array, or -1 if the item is not included in the array. // Delegates to **ECMAScript 5**'s native `indexOf` if available. // If the array is large and already in sort order, pass `true` // for **isSorted** to use binary search. _.indexOf = function(array, item, isSorted) { var i = 0, l = array.length; if (isSorted) { if (typeof isSorted == 'number') { i = (isSorted < 0 ? Math.max(0, l + isSorted) : isSorted); } else { i = _.sortedIndex(array, item); return array[i] === item ? i : -1; } } if (nativeIndexOf && array.indexOf === nativeIndexOf) return array.indexOf(item, isSorted); for (; i < l; i++) if (array[i] === item) return i; return -1; }; // Delegates to **ECMAScript 5**'s native `lastIndexOf` if available. _.lastIndexOf = function(array, item, from) { var hasIndex = from != null; if (nativeLastIndexOf && array.lastIndexOf === nativeLastIndexOf) { return hasIndex ? array.lastIndexOf(item, from) : array.lastIndexOf(item); } var i = (hasIndex ? from : array.length); while (i--) if (array[i] === item) return i; return -1; }; // Generate an integer Array containing an arithmetic progression. A port of // the native Python `range()` function. See // [the Python documentation](http://docs.python.org/library/functions.html#range). _.range = function(start, stop, step) { if (arguments.length <= 1) { stop = start || 0; start = 0; } step = arguments[2] || 1; var len = Math.max(Math.ceil((stop - start) / step), 0); var idx = 0; var range = new Array(len); while(idx < len) { range[idx++] = start; start += step; } return range; }; // Function (ahem) Functions // ------------------ // Reusable constructor function for prototype setting. var ctor = function(){}; // Create a function bound to a given object (assigning `this`, and arguments, // optionally). Binding with arguments is also known as `curry`. // Delegates to **ECMAScript 5**'s native `Function.bind` if available. // We check for `func.bind` first, to fail fast when `func` is undefined. _.bind = function bind(func, context) { var bound, args; if (func.bind === nativeBind && nativeBind) return nativeBind.apply(func, slice.call(arguments, 1)); if (!_.isFunction(func)) throw new TypeError; args = slice.call(arguments, 2); return bound = function() { if (!(this instanceof bound)) return func.apply(context, args.concat(slice.call(arguments))); ctor.prototype = func.prototype; var self = new ctor; var result = func.apply(self, args.concat(slice.call(arguments))); if (Object(result) === result) return result; return self; }; }; // Bind all of an object's methods to that object. Useful for ensuring that // all callbacks defined on an object belong to it. _.bindAll = function(obj) { var funcs = slice.call(arguments, 1); if (funcs.length == 0) funcs = _.functions(obj); each(funcs, function(f) { obj[f] = _.bind(obj[f], obj); }); return obj; }; // Memoize an expensive function by storing its results. _.memoize = function(func, hasher) { var memo = {}; hasher || (hasher = _.identity); return function() { var key = hasher.apply(this, arguments); return _.has(memo, key) ? memo[key] : (memo[key] = func.apply(this, arguments)); }; }; // Delays a function for the given number of milliseconds, and then calls // it with the arguments supplied. _.delay = function(func, wait) { var args = slice.call(arguments, 2); return setTimeout(function(){ return func.apply(null, args); }, wait); }; // Defers a function, scheduling it to run after the current call stack has // cleared. _.defer = function(func) { return _.delay.apply(_, [func, 1].concat(slice.call(arguments, 1))); }; // Returns a function, that, when invoked, will only be triggered at most once // during a given window of time. _.throttle = function(func, wait) { var context, args, timeout, throttling, more, result; var whenDone = _.debounce(function(){ more = throttling = false; }, wait); return function() { context = this; args = arguments; var later = function() { timeout = null; if (more) { result = func.apply(context, args); } whenDone(); }; if (!timeout) timeout = setTimeout(later, wait); if (throttling) { more = true; } else { throttling = true; result = func.apply(context, args); } whenDone(); return result; }; }; // Returns a function, that, as long as it continues to be invoked, will not // be triggered. The function will be called after it stops being called for // N milliseconds. If `immediate` is passed, trigger the function on the // leading edge, instead of the trailing. _.debounce = function(func, wait, immediate) { var timeout, result; return function() { var context = this, args = arguments; var later = function() { timeout = null; if (!immediate) result = func.apply(context, args); }; var callNow = immediate && !timeout; clearTimeout(timeout); timeout = setTimeout(later, wait); if (callNow) result = func.apply(context, args); return result; }; }; // Returns a function that will be executed at most one time, no matter how // often you call it. Useful for lazy initialization. _.once = function(func) { var ran = false, memo; return function() { if (ran) return memo; ran = true; memo = func.apply(this, arguments); func = null; return memo; }; }; // Returns the first function passed as an argument to the second, // allowing you to adjust arguments, run code before and after, and // conditionally execute the original function. _.wrap = function(func, wrapper) { return function() { var args = [func]; push.apply(args, arguments); return wrapper.apply(this, args); }; }; // Returns a function that is the composition of a list of functions, each // consuming the return value of the function that follows. _.compose = function() { var funcs = arguments; return function() { var args = arguments; for (var i = funcs.length - 1; i >= 0; i--) { args = [funcs[i].apply(this, args)]; } return args[0]; }; }; // Returns a function that will only be executed after being called N times. _.after = function(times, func) { if (times <= 0) return func(); return function() { if (--times < 1) { return func.apply(this, arguments); } }; }; // Object Functions // ---------------- // Retrieve the names of an object's properties. // Delegates to **ECMAScript 5**'s native `Object.keys` _.keys = nativeKeys || function(obj) { if (obj !== Object(obj)) throw new TypeError('Invalid object'); var keys = []; for (var key in obj) if (_.has(obj, key)) keys[keys.length] = key; return keys; }; // Retrieve the values of an object's properties. _.values = function(obj) { var values = []; for (var key in obj) if (_.has(obj, key)) values.push(obj[key]); return values; }; // Convert an object into a list of `[key, value]` pairs. _.pairs = function(obj) { var pairs = []; for (var key in obj) if (_.has(obj, key)) pairs.push([key, obj[key]]); return pairs; }; // Invert the keys and values of an object. The values must be serializable. _.invert = function(obj) { var result = {}; for (var key in obj) if (_.has(obj, key)) result[obj[key]] = key; return result; }; // Return a sorted list of the function names available on the object. // Aliased as `methods` _.functions = _.methods = function(obj) { var names = []; for (var key in obj) { if (_.isFunction(obj[key])) names.push(key); } return names.sort(); }; // Extend a given object with all the properties in passed-in object(s). _.extend = function(obj) { each(slice.call(arguments, 1), function(source) { for (var prop in source) { obj[prop] = source[prop]; } }); return obj; }; // Return a copy of the object only containing the whitelisted properties. _.pick = function(obj) { var copy = {}; var keys = concat.apply(ArrayProto, slice.call(arguments, 1)); each(keys, function(key) { if (key in obj) copy[key] = obj[key]; }); return copy; }; // Return a copy of the object without the blacklisted properties. _.omit = function(obj) { var copy = {}; var keys = concat.apply(ArrayProto, slice.call(arguments, 1)); for (var key in obj) { if (!_.contains(keys, key)) copy[key] = obj[key]; } return copy; }; // Fill in a given object with default properties. _.defaults = function(obj) { each(slice.call(arguments, 1), function(source) { for (var prop in source) { if (obj[prop] == null) obj[prop] = source[prop]; } }); return obj; }; // Create a (shallow-cloned) duplicate of an object. _.clone = function(obj) { if (!_.isObject(obj)) return obj; return _.isArray(obj) ? obj.slice() : _.extend({}, obj); }; // Invokes interceptor with the obj, and then returns obj. // The primary purpose of this method is to "tap into" a method chain, in // order to perform operations on intermediate results within the chain. _.tap = function(obj, interceptor) { interceptor(obj); return obj; }; // Internal recursive comparison function for `isEqual`. var eq = function(a, b, aStack, bStack) { // Identical objects are equal. `0 === -0`, but they aren't identical. // See the Harmony `egal` proposal: http://wiki.ecmascript.org/doku.php?id=harmony:egal. if (a === b) return a !== 0 || 1 / a == 1 / b; // A strict comparison is necessary because `null == undefined`. if (a == null || b == null) return a === b; // Unwrap any wrapped objects. if (a instanceof _) a = a._wrapped; if (b instanceof _) b = b._wrapped; // Compare `[[Class]]` names. var className = toString.call(a); if (className != toString.call(b)) return false; switch (className) { // Strings, numbers, dates, and booleans are compared by value. case '[object String]': // Primitives and their corresponding object wrappers are equivalent; thus, `"5"` is // equivalent to `new String("5")`. return a == String(b); case '[object Number]': // `NaN`s are equivalent, but non-reflexive. An `egal` comparison is performed for // other numeric values. return a != +a ? b != +b : (a == 0 ? 1 / a == 1 / b : a == +b); case '[object Date]': case '[object Boolean]': // Coerce dates and booleans to numeric primitive values. Dates are compared by their // millisecond representations. Note that invalid dates with millisecond representations // of `NaN` are not equivalent. return +a == +b; // RegExps are compared by their source patterns and flags. case '[object RegExp]': return a.source == b.source && a.global == b.global && a.multiline == b.multiline && a.ignoreCase == b.ignoreCase; } if (typeof a != 'object' || typeof b != 'object') return false; // Assume equality for cyclic structures. The algorithm for detecting cyclic // structures is adapted from ES 5.1 section 15.12.3, abstract operation `JO`. var length = aStack.length; while (length--) { // Linear search. Performance is inversely proportional to the number of // unique nested structures. if (aStack[length] == a) return bStack[length] == b; } // Add the first object to the stack of traversed objects. aStack.push(a); bStack.push(b); var size = 0, result = true; // Recursively compare objects and arrays. if (className == '[object Array]') { // Compare array lengths to determine if a deep comparison is necessary. size = a.length; result = size == b.length; if (result) { // Deep compare the contents, ignoring non-numeric properties. while (size--) { if (!(result = eq(a[size], b[size], aStack, bStack))) break; } } } else { // Objects with different constructors are not equivalent, but `Object`s // from different frames are. var aCtor = a.constructor, bCtor = b.constructor; if (aCtor !== bCtor && !(_.isFunction(aCtor) && (aCtor instanceof aCtor) && _.isFunction(bCtor) && (bCtor instanceof bCtor))) { return false; } // Deep compare objects. for (var key in a) { if (_.has(a, key)) { // Count the expected number of properties. size++; // Deep compare each member. if (!(result = _.has(b, key) && eq(a[key], b[key], aStack, bStack))) break; } } // Ensure that both objects contain the same number of properties. if (result) { for (key in b) { if (_.has(b, key) && !(size--)) break; } result = !size; } } // Remove the first object from the stack of traversed objects. aStack.pop(); bStack.pop(); return result; }; // Perform a deep comparison to check if two objects are equal. _.isEqual = function(a, b) { return eq(a, b, [], []); }; // Is a given array, string, or object empty? // An "empty" object has no enumerable own-properties. _.isEmpty = function(obj) { if (obj == null) return true; if (_.isArray(obj) || _.isString(obj)) return obj.length === 0; for (var key in obj) if (_.has(obj, key)) return false; return true; }; // Is a given value a DOM element? _.isElement = function(obj) { return !!(obj && obj.nodeType === 1); }; // Is a given value an array? // Delegates to ECMA5's native Array.isArray _.isArray = nativeIsArray || function(obj) { return toString.call(obj) == '[object Array]'; }; // Is a given variable an object? _.isObject = function(obj) { return obj === Object(obj); }; // Add some isType methods: isArguments, isFunction, isString, isNumber, isDate, isRegExp. each(['Arguments', 'Function', 'String', 'Number', 'Date', 'RegExp'], function(name) { _['is' + name] = function(obj) { return toString.call(obj) == '[object ' + name + ']'; }; }); // Define a fallback version of the method in browsers (ahem, IE), where // there isn't any inspectable "Arguments" type. if (!_.isArguments(arguments)) { _.isArguments = function(obj) { return !!(obj && _.has(obj, 'callee')); }; } // Optimize `isFunction` if appropriate. if (typeof (/./) !== 'function') { _.isFunction = function(obj) { return typeof obj === 'function'; }; } // Is a given object a finite number? _.isFinite = function(obj) { return _.isNumber(obj) && isFinite(obj); }; // Is the given value `NaN`? (NaN is the only number which does not equal itself). _.isNaN = function(obj) { return _.isNumber(obj) && obj != +obj; }; // Is a given value a boolean? _.isBoolean = function(obj) { return obj === true || obj === false || toString.call(obj) == '[object Boolean]'; }; // Is a given value equal to null? _.isNull = function(obj) { return obj === null; }; // Is a given variable undefined? _.isUndefined = function(obj) { return obj === void 0; }; // Shortcut function for checking if an object has a given property directly // on itself (in other words, not on a prototype). _.has = function(obj, key) { return hasOwnProperty.call(obj, key); }; // Utility Functions // ----------------- // Run Underscore.js in *noConflict* mode, returning the `_` variable to its // previous owner. Returns a reference to the Underscore object. _.noConflict = function() { root._ = previousUnderscore; return this; }; // Keep the identity function around for default iterators. _.identity = function(value) { return value; }; // Run a function **n** times. _.times = function(n, iterator, context) { for (var i = 0; i < n; i++) iterator.call(context, i); }; // Return a random integer between min and max (inclusive). _.random = function(min, max) { if (max == null) { max = min; min = 0; } return min + (0 | Math.random() * (max - min + 1)); }; // List of HTML entities for escaping. var entityMap = { escape: { '&': '&', '<': '<', '>': '>', '"': '"', "'": ''', '/': '/' } }; entityMap.unescape = _.invert(entityMap.escape); // Regexes containing the keys and values listed immediately above. var entityRegexes = { escape: new RegExp('[' + _.keys(entityMap.escape).join('') + ']', 'g'), unescape: new RegExp('(' + _.keys(entityMap.unescape).join('|') + ')', 'g') }; // Functions for escaping and unescaping strings to/from HTML interpolation. _.each(['escape', 'unescape'], function(method) { _[method] = function(string) { if (string == null) return ''; return ('' + string).replace(entityRegexes[method], function(match) { return entityMap[method][match]; }); }; }); // If the value of the named property is a function then invoke it; // otherwise, return it. _.result = function(object, property) { if (object == null) return null; var value = object[property]; return _.isFunction(value) ? value.call(object) : value; }; // Add your own custom functions to the Underscore object. _.mixin = function(obj) { each(_.functions(obj), function(name){ var func = _[name] = obj[name]; _.prototype[name] = function() { var args = [this._wrapped]; push.apply(args, arguments); return result.call(this, func.apply(_, args)); }; }); }; // Generate a unique integer id (unique within the entire client session). // Useful for temporary DOM ids. var idCounter = 0; _.uniqueId = function(prefix) { var id = idCounter++; return prefix ? prefix + id : id; }; // By default, Underscore uses ERB-style template delimiters, change the // following template settings to use alternative delimiters. _.templateSettings = { evaluate : /<%([\s\S]+?)%>/g, interpolate : /<%=([\s\S]+?)%>/g, escape : /<%-([\s\S]+?)%>/g }; // When customizing `templateSettings`, if you don't want to define an // interpolation, evaluation or escaping regex, we need one that is // guaranteed not to match. var noMatch = /(.)^/; // Certain characters need to be escaped so that they can be put into a // string literal. var escapes = { "'": "'", '\\': '\\', '\r': 'r', '\n': 'n', '\t': 't', '\u2028': 'u2028', '\u2029': 'u2029' }; var escaper = /\\|'|\r|\n|\t|\u2028|\u2029/g; // JavaScript micro-templating, similar to John Resig's implementation. // Underscore templating handles arbitrary delimiters, preserves whitespace, // and correctly escapes quotes within interpolated code. _.template = function(text, data, settings) { settings = _.defaults({}, settings, _.templateSettings); // Combine delimiters into one regular expression via alternation. var matcher = new RegExp([ (settings.escape || noMatch).source, (settings.interpolate || noMatch).source, (settings.evaluate || noMatch).source ].join('|') + '|$', 'g'); // Compile the template source, escaping string literals appropriately. var index = 0; var source = "__p+='"; text.replace(matcher, function(match, escape, interpolate, evaluate, offset) { source += text.slice(index, offset) .replace(escaper, function(match) { return '\\' + escapes[match]; }); source += escape ? 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Events.bind = Events.on; Events.unbind = Events.off; // Allow the `Backbone` object to serve as a global event bus, for folks who // want global "pubsub" in a convenient place. //_.extend(Backbone, Events); // Backbone.Model // -------------- // Create a new model, with defined attributes. A client id (`cid`) // is automatically generated and assigned for you. var Model = Backbone.Model = function(attributes, options) { var defaults; var attrs = attributes || {}; this.cid = _.uniqueId('c'); this.attributes = {}; if (options && options.collection) this.collection = options.collection; if (options && options.parse) attrs = this.parse(attrs, options) || {}; if (defaults = _.result(this, 'defaults')) { attrs = _.defaults({}, attrs, defaults); } this.set(attrs, options); this.changed = {}; this.initialize.apply(this, arguments); }; // Attach all inheritable methods to the Model prototype. _.extend(Model.prototype, Events, { // A hash of attributes whose current and previous value differ. changed: null, // The default name for the JSON `id` attribute is `"id"`. MongoDB and // CouchDB users may want to set this to `"_id"`. idAttribute: 'id', // Initialize is an empty function by default. Override it with your own // initialization logic. initialize: function(){}, // Return a copy of the model's `attributes` object. toJSON: function(options) { return _.clone(this.attributes); }, // Proxy `Backbone.sync` by default. sync: function() { return Backbone.sync.apply(this, arguments); }, // Get the value of an attribute. get: function(attr) { return this.attributes[attr]; }, // Get the HTML-escaped value of an attribute. escape: function(attr) { return _.escape(this.get(attr)); }, // Returns `true` if the attribute contains a value that is not null // or undefined. has: function(attr) { return this.get(attr) != null; }, // ---------------------------------------------------------------------- // Set a hash of model attributes on the object, firing `"change"` unless // you choose to silence it. set: function(key, val, options) { var attr, attrs, unset, changes, silent, changing, prev, current; if (key == null) return this; // Handle both `"key", value` and `{key: value}` -style arguments. if (typeof key === 'object') { attrs = key; options = val; } else { (attrs = {})[key] = val; } options || (options = {}); // Run validation. if (!this._validate(attrs, options)) return false; // Extract attributes and options. unset = options.unset; silent = options.silent; changes = []; changing = this._changing; this._changing = true; if (!changing) { this._previousAttributes = _.clone(this.attributes); this.changed = {}; } current = this.attributes, prev = this._previousAttributes; // Check for changes of `id`. if (this.idAttribute in attrs) this.id = attrs[this.idAttribute]; // For each `set` attribute, update or delete the current value. for (attr in attrs) { val = attrs[attr]; if (!_.isEqual(current[attr], val)) changes.push(attr); if (!_.isEqual(prev[attr], val)) { this.changed[attr] = val; } else { delete this.changed[attr]; } unset ? delete current[attr] : current[attr] = val; } // Trigger all relevant attribute changes. if (!silent) { if (changes.length) this._pending = true; for (var i = 0, l = changes.length; i < l; i++) { this.trigger('change:' + changes[i], this, current[changes[i]], options); } } if (changing) return this; if (!silent) { while (this._pending) { this._pending = false; this.trigger('change', this, options); } } this._pending = false; this._changing = false; return this; }, // Remove an attribute from the model, firing `"change"` unless you choose // to silence it. `unset` is a noop if the attribute doesn't exist. unset: function(attr, options) { return this.set(attr, void 0, _.extend({}, options, {unset: true})); }, // Clear all attributes on the model, firing `"change"` unless you choose // to silence it. clear: function(options) { var attrs = {}; for (var key in this.attributes) attrs[key] = void 0; return this.set(attrs, _.extend({}, options, {unset: true})); }, // Determine if the model has changed since the last `"change"` event. // If you specify an attribute name, determine if that attribute has changed. hasChanged: function(attr) { if (attr == null) return !_.isEmpty(this.changed); return _.has(this.changed, attr); }, // Return an object containing all the attributes that have changed, or // false if there are no changed attributes. Useful for determining what // parts of a view need to be updated and/or what attributes need to be // persisted to the server. Unset attributes will be set to undefined. // You can also pass an attributes object to diff against the model, // determining if there *would be* a change. changedAttributes: function(diff) { if (!diff) return this.hasChanged() ? _.clone(this.changed) : false; var val, changed = false; var old = this._changing ? this._previousAttributes : this.attributes; for (var attr in diff) { if (_.isEqual(old[attr], (val = diff[attr]))) continue; (changed || (changed = {}))[attr] = val; } return changed; }, // Get the previous value of an attribute, recorded at the time the last // `"change"` event was fired. previous: function(attr) { if (attr == null || !this._previousAttributes) return null; return this._previousAttributes[attr]; }, // Get all of the attributes of the model at the time of the previous // `"change"` event. previousAttributes: function() { return _.clone(this._previousAttributes); }, // --------------------------------------------------------------------- // Fetch the model from the server. If the server's representation of the // model differs from its current attributes, they will be overriden, // triggering a `"change"` event. fetch: function(options) { options = options ? _.clone(options) : {}; if (options.parse === void 0) options.parse = true; var success = options.success; options.success = function(model, resp, options) { if (!model.set(model.parse(resp, options), options)) return false; if (success) success(model, resp, options); }; return this.sync('read', this, options); }, // Set a hash of model attributes, and sync the model to the server. // If the server returns an attributes hash that differs, the model's // state will be `set` again. save: function(key, val, options) { var attrs, success, method, xhr, attributes = this.attributes; // Handle both `"key", value` and `{key: value}` -style arguments. if (key == null || typeof key === 'object') { attrs = key; options = val; } else { (attrs = {})[key] = val; } // If we're not waiting and attributes exist, save acts as `set(attr).save(null, opts)`. if (attrs && (!options || !options.wait) && !this.set(attrs, options)) return false; options = _.extend({validate: true}, options); // Do not persist invalid models. if (!this._validate(attrs, options)) return false; // Set temporary attributes if `{wait: true}`. if (attrs && options.wait) { this.attributes = _.extend({}, attributes, attrs); } // After a successful server-side save, the client is (optionally) // updated with the server-side state. if (options.parse === void 0) options.parse = true; success = options.success; options.success = function(model, resp, options) { // Ensure attributes are restored during synchronous saves. model.attributes = attributes; var serverAttrs = model.parse(resp, options); if (options.wait) serverAttrs = _.extend(attrs || {}, serverAttrs); if (_.isObject(serverAttrs) && !model.set(serverAttrs, options)) { return false; } if (success) success(model, resp, options); }; // Finish configuring and sending the Ajax request. method = this.isNew() ? 'create' : (options.patch ? 'patch' : 'update'); if (method === 'patch') options.attrs = attrs; xhr = this.sync(method, this, options); // Restore attributes. if (attrs && options.wait) this.attributes = attributes; return xhr; }, // Destroy this model on the server if it was already persisted. // Optimistically removes the model from its collection, if it has one. // If `wait: true` is passed, waits for the server to respond before removal. destroy: function(options) { options = options ? _.clone(options) : {}; var model = this; var success = options.success; var destroy = function() { model.trigger('destroy', model, model.collection, options); }; options.success = function(model, resp, options) { if (options.wait || model.isNew()) destroy(); if (success) success(model, resp, options); }; if (this.isNew()) { options.success(this, null, options); return false; } var xhr = this.sync('delete', this, options); if (!options.wait) destroy(); return xhr; }, // Default URL for the model's representation on the server -- if you're // using Backbone's restful methods, override this to change the endpoint // that will be called. url: function() { var base = _.result(this, 'urlRoot') || _.result(this.collection, 'url') || urlError(); if (this.isNew()) return base; return base + (base.charAt(base.length - 1) === '/' ? '' : '/') + encodeURIComponent(this.id); }, // **parse** converts a response into the hash of attributes to be `set` on // the model. The default implementation is just to pass the response along. parse: function(resp, options) { return resp; }, // Create a new model with identical attributes to this one. clone: function() { return new this.constructor(this.attributes); }, // A model is new if it has never been saved to the server, and lacks an id. isNew: function() { return this.id == null; }, // Check if the model is currently in a valid state. isValid: function(options) { return !this.validate || !this.validate(this.attributes, options); }, // Run validation against the next complete set of model attributes, // returning `true` if all is well. Otherwise, fire a general // `"error"` event and call the error callback, if specified. _validate: function(attrs, options) { if (!options.validate || !this.validate) return true; attrs = _.extend({}, this.attributes, attrs); var error = this.validationError = this.validate(attrs, options) || null; if (!error) return true; this.trigger('invalid', this, error, options || {}); return false; } }); // Backbone.Collection // ------------------- // Provides a standard collection class for our sets of models, ordered // or unordered. If a `comparator` is specified, the Collection will maintain // its models in sort order, as they're added and removed. var Collection = Backbone.Collection = function(models, options) { options || (options = {}); if (options.model) this.model = options.model; if (options.comparator !== void 0) this.comparator = options.comparator; this.models = []; this._reset(); this.initialize.apply(this, arguments); if (models) this.reset(models, _.extend({silent: true}, options)); }; // Define the Collection's inheritable methods. _.extend(Collection.prototype, Events, { // The default model for a collection is just a **Backbone.Model**. // This should be overridden in most cases. model: Model, // Initialize is an empty function by default. Override it with your own // initialization logic. initialize: function(){}, // The JSON representation of a Collection is an array of the // models' attributes. toJSON: function(options) { return this.map(function(model){ return model.toJSON(options); }); }, // Proxy `Backbone.sync` by default. sync: function() { return Backbone.sync.apply(this, arguments); }, // Add a model, or list of models to the set. add: function(models, options) { models = _.isArray(models) ? models.slice() : [models]; options || (options = {}); var i, l, model, attrs, existing, doSort, add, at, sort, sortAttr; add = []; at = options.at; sort = this.comparator && (at == null) && options.sort != false; sortAttr = _.isString(this.comparator) ? this.comparator : null; // Turn bare objects into model references, and prevent invalid models // from being added. for (i = 0, l = models.length; i < l; i++) { if (!(model = this._prepareModel(attrs = models[i], options))) { this.trigger('invalid', this, attrs, options); continue; } // If a duplicate is found, prevent it from being added and // optionally merge it into the existing model. if (existing = this.get(model)) { if (options.merge) { existing.set(attrs === model ? model.attributes : attrs, options); if (sort && !doSort && existing.hasChanged(sortAttr)) doSort = true; } continue; } // This is a new model, push it to the `add` list. add.push(model); // Listen to added models' events, and index models for lookup by // `id` and by `cid`. model.on('all', this._onModelEvent, this); this._byId[model.cid] = model; if (model.id != null) this._byId[model.id] = model; } // See if sorting is needed, update `length` and splice in new models. if (add.length) { if (sort) doSort = true; this.length += add.length; if (at != null) { splice.apply(this.models, [at, 0].concat(add)); } else { push.apply(this.models, add); } } // Silently sort the collection if appropriate. if (doSort) this.sort({silent: true}); if (options.silent) return this; // Trigger `add` events. for (i = 0, l = add.length; i < l; i++) { (model = add[i]).trigger('add', model, this, options); } // Trigger `sort` if the collection was sorted. if (doSort) this.trigger('sort', this, options); return this; }, // Remove a model, or a list of models from the set. remove: function(models, options) { models = _.isArray(models) ? models.slice() : [models]; options || (options = {}); var i, l, index, model; for (i = 0, l = models.length; i < l; i++) { model = this.get(models[i]); if (!model) continue; delete this._byId[model.id]; delete this._byId[model.cid]; index = this.indexOf(model); this.models.splice(index, 1); this.length--; if (!options.silent) { options.index = index; model.trigger('remove', model, this, options); } this._removeReference(model); } return this; }, // Add a model to the end of the collection. push: function(model, options) { model = this._prepareModel(model, options); this.add(model, _.extend({at: this.length}, options)); return model; }, // Remove a model from the end of the collection. pop: function(options) { var model = this.at(this.length - 1); this.remove(model, options); return model; }, // Add a model to the beginning of the collection. unshift: function(model, options) { model = this._prepareModel(model, options); this.add(model, _.extend({at: 0}, options)); return model; }, // Remove a model from the beginning of the collection. shift: function(options) { var model = this.at(0); this.remove(model, options); return model; }, // Slice out a sub-array of models from the collection. slice: function(begin, end) { return this.models.slice(begin, end); }, // Get a model from the set by id. get: function(obj) { if (obj == null) return void 0; this._idAttr || (this._idAttr = this.model.prototype.idAttribute); return this._byId[obj.id || obj.cid || obj[this._idAttr] || obj]; }, // Get the model at the given index. at: function(index) { return this.models[index]; }, // Return models with matching attributes. Useful for simple cases of `filter`. where: function(attrs) { if (_.isEmpty(attrs)) return []; return this.filter(function(model) { for (var key in attrs) { if (attrs[key] !== model.get(key)) return false; } return true; }); }, // Force the collection to re-sort itself. You don't need to call this under // normal circumstances, as the set will maintain sort order as each item // is added. sort: function(options) { if (!this.comparator) { throw new Error('Cannot sort a set without a comparator'); } options || (options = {}); // Run sort based on type of `comparator`. if (_.isString(this.comparator) || this.comparator.length === 1) { this.models = this.sortBy(this.comparator, this); } else { this.models.sort(_.bind(this.comparator, this)); } if (!options.silent) this.trigger('sort', this, options); return this; }, // Pluck an attribute from each model in the collection. pluck: function(attr) { return _.invoke(this.models, 'get', attr); }, // Smartly update a collection with a change set of models, adding, // removing, and merging as necessary. update: function(models, options) { options = _.extend({add: true, merge: true, remove: true}, options); if (options.parse) models = this.parse(models, options); var model, i, l, existing; var add = [], remove = [], modelMap = {}; // Allow a single model (or no argument) to be passed. if (!_.isArray(models)) models = models ? [models] : []; // Proxy to `add` for this case, no need to iterate... if (options.add && !options.remove) return this.add(models, options); // Determine which models to add and merge, and which to remove. for (i = 0, l = models.length; i < l; i++) { model = models[i]; existing = this.get(model); if (options.remove && existing) modelMap[existing.cid] = true; if ((options.add && !existing) || (options.merge && existing)) { add.push(model); } } if (options.remove) { for (i = 0, l = this.models.length; i < l; i++) { model = this.models[i]; if (!modelMap[model.cid]) remove.push(model); } } // Remove models (if applicable) before we add and merge the rest. if (remove.length) this.remove(remove, options); if (add.length) this.add(add, options); return this; }, // When you have more items than you want to add or remove individually, // you can reset the entire set with a new list of models, without firing // any `add` or `remove` events. Fires `reset` when finished. reset: function(models, options) { options || (options = {}); if (options.parse) models = this.parse(models, options); for (var i = 0, l = this.models.length; i < l; i++) { this._removeReference(this.models[i]); } options.previousModels = this.models.slice(); this._reset(); if (models) this.add(models, _.extend({silent: true}, options)); if (!options.silent) this.trigger('reset', this, options); return this; }, // Fetch the default set of models for this collection, resetting the // collection when they arrive. If `update: true` is passed, the response // data will be passed through the `update` method instead of `reset`. fetch: function(options) { options = options ? _.clone(options) : {}; if (options.parse === void 0) options.parse = true; var success = options.success; options.success = function(collection, resp, options) { var method = options.update ? 'update' : 'reset'; collection[method](resp, options); if (success) success(collection, resp, options); }; return this.sync('read', this, options); }, // Create a new instance of a model in this collection. Add the model to the // collection immediately, unless `wait: true` is passed, in which case we // wait for the server to agree. create: function(model, options) { options = options ? _.clone(options) : {}; if (!(model = this._prepareModel(model, options))) return false; if (!options.wait) this.add(model, options); var collection = this; var success = options.success; options.success = function(model, resp, options) { if (options.wait) collection.add(model, options); if (success) success(model, resp, options); }; model.save(null, options); return model; }, // **parse** converts a response into a list of models to be added to the // collection. The default implementation is just to pass it through. parse: function(resp, options) { return resp; }, // Create a new collection with an identical list of models as this one. clone: function() { return new this.constructor(this.models); }, // Reset all internal state. Called when the collection is reset. _reset: function() { this.length = 0; this.models.length = 0; this._byId = {}; }, // Prepare a model or hash of attributes to be added to this collection. _prepareModel: function(attrs, options) { if (attrs instanceof Model) { if (!attrs.collection) attrs.collection = this; return attrs; } options || (options = {}); options.collection = this; var model = new this.model(attrs, options); if (!model._validate(attrs, options)) return false; return model; }, // Internal method to remove a model's ties to a collection. _removeReference: function(model) { if (this === model.collection) delete model.collection; model.off('all', this._onModelEvent, this); }, // Internal method called every time a model in the set fires an event. // Sets need to update their indexes when models change ids. All other // events simply proxy through. "add" and "remove" events that originate // in other collections are ignored. _onModelEvent: function(event, model, collection, options) { if ((event === 'add' || event === 'remove') && collection !== this) return; if (event === 'destroy') this.remove(model, options); if (model && event === 'change:' + model.idAttribute) { delete this._byId[model.previous(model.idAttribute)]; if (model.id != null) this._byId[model.id] = model; } this.trigger.apply(this, arguments); }, sortedIndex: function (model, value, context) { value || (value = this.comparator); var iterator = _.isFunction(value) ? value : function(model) { return model.get(value); }; return _.sortedIndex(this.models, model, iterator, context); } }); // Underscore methods that we want to implement on the Collection. var methods = ['forEach', 'each', 'map', 'collect', 'reduce', 'foldl', 'inject', 'reduceRight', 'foldr', 'find', 'detect', 'filter', 'select', 'reject', 'every', 'all', 'some', 'any', 'include', 'contains', 'invoke', 'max', 'min', 'toArray', 'size', 'first', 'head', 'take', 'initial', 'rest', 'tail', 'drop', 'last', 'without', 'indexOf', 'shuffle', 'lastIndexOf', 'isEmpty', 'chain']; // Mix in each Underscore method as a proxy to `Collection#models`. _.each(methods, function(method) { Collection.prototype[method] = function() { var args = slice.call(arguments); args.unshift(this.models); return _[method].apply(_, args); }; }); // Underscore methods that take a property name as an argument. var attributeMethods = ['groupBy', 'countBy', 'sortBy']; // Use attributes instead of properties. _.each(attributeMethods, function(method) { Collection.prototype[method] = function(value, context) { var iterator = _.isFunction(value) ? value : function(model) { return model.get(value); }; return _[method](this.models, iterator, context); }; }); // Backbone.Router // --------------- // Routers map faux-URLs to actions, and fire events when routes are // matched. Creating a new one sets its `routes` hash, if not set statically. var Router = Backbone.Router = function(options) { options || (options = {}); if (options.routes) this.routes = options.routes; this._bindRoutes(); this.initialize.apply(this, arguments); }; // Cached regular expressions for matching named param parts and splatted // parts of route strings. var optionalParam = /\((.*?)\)/g; var namedParam = /(\(\?)?:\w+/g; var splatParam = /\*\w+/g; var escapeRegExp = /[\-{}\[\]+?.,\\\^$|#\s]/g; // Set up all inheritable **Backbone.Router** properties and methods. _.extend(Router.prototype, Events, { // Initialize is an empty function by default. Override it with your own // initialization logic. initialize: function(){}, // Manually bind a single named route to a callback. For example: // // this.route('search/:query/p:num', 'search', function(query, num) { // ... // }); // route: function(route, name, callback) { if (!_.isRegExp(route)) route = this._routeToRegExp(route); if (!callback) callback = this[name]; Backbone.history.route(route, _.bind(function(fragment) { var args = this._extractParameters(route, fragment); callback && callback.apply(this, args); this.trigger.apply(this, ['route:' + name].concat(args)); this.trigger('route', name, args); Backbone.history.trigger('route', this, name, args); }, this)); return this; }, // Simple proxy to `Backbone.history` to save a fragment into the history. navigate: function(fragment, options) { Backbone.history.navigate(fragment, options); return this; }, // Bind all defined routes to `Backbone.history`. We have to reverse the // order of the routes here to support behavior where the most general // routes can be defined at the bottom of the route map. _bindRoutes: function() { if (!this.routes) return; var route, routes = _.keys(this.routes); while ((route = routes.pop()) != null) { this.route(route, this.routes[route]); } }, // Convert a route string into a regular expression, suitable for matching // against the current location hash. _routeToRegExp: function(route) { route = route.replace(escapeRegExp, '\\$&') .replace(optionalParam, '(?:$1)?') .replace(namedParam, function(match, optional){ return optional ? match : '([^\/]+)'; }) .replace(splatParam, '(.*?)'); return new RegExp('^' + route + '$'); }, // Given a route, and a URL fragment that it matches, return the array of // extracted parameters. _extractParameters: function(route, fragment) { return route.exec(fragment).slice(1); } }); // Backbone.History // ---------------- // Handles cross-browser history management, based on URL fragments. If the // browser does not support `onhashchange`, falls back to polling. var History = Backbone.History = function() { this.handlers = []; _.bindAll(this, 'checkUrl'); // Ensure that `History` can be used outside of the browser. if (typeof window !== 'undefined') { this.location = window.location; this.history = window.history; } }; // Cached regex for stripping a leading hash/slash and trailing space. var routeStripper = /^[#\/]|\s+$/g; // Cached regex for stripping leading and trailing slashes. var rootStripper = /^\/+|\/+$/g; // Cached regex for detecting MSIE. var isExplorer = /msie [\w.]+/; // Cached regex for removing a trailing slash. var trailingSlash = /\/$/; // Has the history handling already been started? History.started = false; // Set up all inheritable **Backbone.History** properties and methods. _.extend(History.prototype, Events, { // The default interval to poll for hash changes, if necessary, is // twenty times a second. interval: 50, // Gets the true hash value. Cannot use location.hash directly due to bug // in Firefox where location.hash will always be decoded. getHash: function(window) { var match = (window || this).location.href.match(/#(.*)$/); return match ? match[1] : ''; }, // Get the cross-browser normalized URL fragment, either from the URL, // the hash, or the override. getFragment: function(fragment, forcePushState) { if (fragment == null) { if (this._hasPushState || !this._wantsHashChange || forcePushState) { fragment = this.location.pathname; var root = this.root.replace(trailingSlash, ''); if (!fragment.indexOf(root)) fragment = fragment.substr(root.length); } else { fragment = this.getHash(); } } return fragment.replace(routeStripper, ''); }, // Start the hash change handling, returning `true` if the current URL matches // an existing route, and `false` otherwise. start: function(options) { if (History.started) throw new Error("Backbone.history has already been started"); History.started = true; // Figure out the initial configuration. Do we need an iframe? // Is pushState desired ... is it available? this.options = _.extend({}, {root: '/'}, this.options, options); this.root = this.options.root; this._wantsHashChange = this.options.hashChange !== false; this._wantsPushState = !!this.options.pushState; this._hasPushState = !!(this.options.pushState && this.history && this.history.pushState); var fragment = this.getFragment(); var docMode = document.documentMode; var oldIE = (isExplorer.exec(navigator.userAgent.toLowerCase()) && (!docMode || docMode <= 7)); // Normalize root to always include a leading and trailing slash. this.root = ('/' + this.root + '/').replace(rootStripper, '/'); if (oldIE && this._wantsHashChange) { this.iframe = Backbone.$('