1 |
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2 | /**
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3 | * Expose `Delegator`.
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4 | */
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5 |
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6 | module.exports = Delegator;
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7 |
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8 | /**
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9 | * Initialize a delegator.
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10 | *
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11 | * @param {Object} proto
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12 | * @param {String} target
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13 | * @api public
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14 | */
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15 |
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16 | function Delegator(proto, target) {
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17 | if (!(this instanceof Delegator)) return new Delegator(proto, target);
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18 | this.proto = proto;
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19 | this.target = target;
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20 | this.methods = [];
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21 | this.getters = [];
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22 | this.setters = [];
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23 | this.fluents = [];
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24 | }
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25 |
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26 | /**
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27 | * Delegate method `name`.
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28 | *
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29 | * @param {String} name
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30 | * @return {Delegator} self
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31 | * @api public
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32 | */
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33 |
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34 | Delegator.prototype.method = function(name){
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35 | var proto = this.proto;
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36 | var target = this.target;
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37 | this.methods.push(name);
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38 |
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39 | proto[name] = function(){
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40 | return this[target][name].apply(this[target], arguments);
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41 | };
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42 |
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43 | return this;
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44 | };
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45 |
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46 | /**
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47 | * Delegator accessor `name`.
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48 | *
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49 | * @param {String} name
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50 | * @return {Delegator} self
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51 | * @api public
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52 | */
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53 |
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54 | Delegator.prototype.access = function(name){
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55 | return this.getter(name).setter(name);
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56 | };
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57 |
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58 | /**
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59 | * Delegator getter `name`.
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60 | *
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61 | * @param {String} name
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62 | * @return {Delegator} self
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63 | * @api public
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64 | */
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65 |
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66 | Delegator.prototype.getter = function(name){
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67 | var proto = this.proto;
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68 | var target = this.target;
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69 | this.getters.push(name);
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70 |
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71 | proto.__defineGetter__(name, function(){
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72 | return this[target][name];
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73 | });
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74 |
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75 | return this;
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76 | };
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77 |
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78 | /**
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79 | * Delegator setter `name`.
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80 | *
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81 | * @param {String} name
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82 | * @return {Delegator} self
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83 | * @api public
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84 | */
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85 |
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86 | Delegator.prototype.setter = function(name){
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87 | var proto = this.proto;
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88 | var target = this.target;
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89 | this.setters.push(name);
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90 |
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91 | proto.__defineSetter__(name, function(val){
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92 | return this[target][name] = val;
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93 | });
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94 |
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95 | return this;
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96 | };
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97 |
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98 | /**
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99 | * Delegator fluent accessor
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100 | *
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101 | * @param {String} name
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102 | * @return {Delegator} self
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103 | * @api public
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104 | */
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105 |
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106 | Delegator.prototype.fluent = function (name) {
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107 | var proto = this.proto;
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108 | var target = this.target;
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109 | this.fluents.push(name);
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110 |
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111 | proto[name] = function(val){
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112 | if ('undefined' != typeof val) {
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113 | this[target][name] = val;
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114 | return this;
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115 | } else {
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116 | return this[target][name];
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117 | }
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118 | };
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119 |
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120 | return this;
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121 | };
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