[17225] | 1 | // https://gist.github.com/2956493 |
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| 2 | |
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| 3 | /** |
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| 4 | July 30th 2012 |
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| 5 | Damien "Mistic"Sorel |
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| 6 | add increment() and decrement() methods |
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| 7 | */ |
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| 8 | |
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| 9 | var MultiGetSet = function(opt){ |
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| 10 | |
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| 11 | var getType = function(o) { |
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| 12 | return ({}).toString.call(o).match(/\s([a-zA-Z]+)/)[1].toLowerCase() |
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| 13 | }; |
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| 14 | |
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| 15 | if(!opt.public || !opt.private) |
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| 16 | return opt.public; |
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| 17 | |
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| 18 | if(opt.handler && opt.handler.init) |
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| 19 | opt.handler.init(opt); |
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| 20 | |
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| 21 | if(!opt.handler || !opt.handler.setter){ |
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| 22 | opt.public.set = function(paramName, newValue){ |
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| 23 | opt.private[paramName] = newValue; |
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| 24 | }; |
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| 25 | }else{ |
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| 26 | opt.public.set = function(paramName, newValue){ |
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| 27 | return opt.handler.setter({ |
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| 28 | public: opt.public, |
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| 29 | private: opt.private, |
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| 30 | paramName: paramName, |
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| 31 | newValue: newValue, |
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| 32 | caller: arguments.callee.caller |
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| 33 | }); |
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| 34 | }; |
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| 35 | } |
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| 36 | |
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| 37 | if(!opt.handler || !opt.handler.getter){ |
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| 38 | opt.public.get = function(paramName){ |
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| 39 | return opt.private[paramName]; |
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| 40 | }; |
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| 41 | }else{ |
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| 42 | opt.public.get = function(paramName){ |
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| 43 | return opt.handler.getter({ |
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| 44 | public: opt.public, |
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| 45 | private: opt.private, |
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| 46 | paramName: paramName, |
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| 47 | caller: arguments.callee.caller |
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| 48 | }); |
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| 49 | }; |
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| 50 | } |
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| 51 | |
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| 52 | if(!opt.handler || !opt.handler.adder){ |
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| 53 | opt.public.add = function(paramName, newValue){ |
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| 54 | if(getType(opt.private[paramName])==="array") |
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| 55 | opt.private[paramName].push(newValue); |
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| 56 | }; |
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| 57 | }else{ |
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| 58 | opt.public.add = function(paramName, newValue){ |
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| 59 | if(getType(opt.private[paramName])==="array") |
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| 60 | return opt.handler.adder({ |
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| 61 | public: opt.public, |
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| 62 | private: opt.private, |
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| 63 | paramName: paramName, |
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| 64 | newValue: newValue, |
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| 65 | caller: arguments.callee.caller |
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| 66 | }); |
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| 67 | }; |
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| 68 | } |
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| 69 | |
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| 70 | opt.public.increment = function(paramName, add) { |
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| 71 | if (add == null) add = 1; |
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| 72 | opt.public.set(paramName, opt.public.get(paramName)+add); |
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| 73 | }; |
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| 74 | |
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| 75 | opt.public.decrement = function(paramName, rem) { |
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| 76 | if (rem == null) rem = 1; |
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| 77 | opt.public.increment(paramName, -rem); |
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| 78 | }; |
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| 79 | |
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| 80 | return opt.public; |
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| 81 | }; |
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| 82 | |
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| 83 | var Observable = { |
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| 84 | |
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| 85 | |
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| 86 | clone: function(o){ |
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| 87 | if(o == null || typeof(o) != 'object') |
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| 88 | return o; |
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| 89 | |
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| 90 | var temp = o.constructor(); // changed |
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| 91 | |
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| 92 | for(var key in o) |
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| 93 | temp[key] = Observable.clone(o[key]); |
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| 94 | return temp; |
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| 95 | }, |
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| 96 | |
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| 97 | init: function(opt){ |
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| 98 | opt.public.listeners = {}; |
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| 99 | |
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| 100 | opt.public.listen = function(paramName, callback){ |
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| 101 | if(Object.prototype.toString.call(paramName) === '[object Array]') |
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| 102 | for(var p in paramName){ |
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| 103 | opt.public.listenOne(paramName[p], callback); |
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| 104 | } |
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| 105 | else |
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| 106 | opt.public.listenOne(paramName, callback); |
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| 107 | }; |
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| 108 | |
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| 109 | opt.public.listenOne = function(paramName, callback){ |
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| 110 | if(!opt.public.listeners[paramName]) |
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| 111 | opt.public.listeners[paramName] = []; |
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| 112 | opt.public.listeners[paramName].push(callback); |
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| 113 | }; |
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| 114 | }, |
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| 115 | |
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| 116 | setter: function(opt){ |
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| 117 | if(opt.private[opt.paramName] == opt.newValue) |
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| 118 | return; |
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| 119 | |
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| 120 | opt.oldValue = Observable.clone(opt.private[opt.paramName]); |
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| 121 | |
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| 122 | opt.private[opt.paramName] = opt.newValue; |
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| 123 | |
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| 124 | for(var listener in opt.public.listeners[opt.paramName]){ |
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| 125 | if(opt.caller != opt.public.listeners[opt.paramName][listener]) |
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| 126 | opt.public.listeners[opt.paramName][listener](opt); |
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| 127 | } |
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| 128 | }, |
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| 129 | |
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| 130 | adder: function(opt){ |
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| 131 | if(opt.private[opt.paramName] == opt.newValue || !opt.private[opt.paramName].push) |
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| 132 | return; |
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| 133 | |
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| 134 | opt.oldValue = Observable.clone(opt.private[opt.paramName]); |
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| 135 | |
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| 136 | opt.private[opt.paramName].push(opt.newValue); |
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| 137 | opt.newValue = opt.private[opt.paramName]; |
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| 138 | |
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| 139 | for(var listener in opt.public.listeners[opt.paramName]){ |
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| 140 | if(opt.caller != opt.public.listeners[opt.paramName][listener]) |
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| 141 | opt.public.listeners[opt.paramName][listener](opt); |
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| 142 | } |
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| 143 | } |
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| 144 | }; |
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