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7 |
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8 | (function (exports, io) {
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9 |
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10 | |
11 |
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12 |
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13 |
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14 | exports.EventEmitter = EventEmitter;
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15 |
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16 | |
17 |
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18 |
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19 |
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20 |
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21 |
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22 | function EventEmitter () {};
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23 |
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24 | |
25 |
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26 |
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27 |
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28 |
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29 |
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30 | EventEmitter.prototype.on = function (name, fn) {
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31 | if (!this.$events) {
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32 | this.$events = {};
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33 | }
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34 |
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35 | if (!this.$events[name]) {
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36 | this.$events[name] = fn;
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37 | } else if (io.util.isArray(this.$events[name])) {
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38 | this.$events[name].push(fn);
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39 | } else {
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40 | this.$events[name] = [this.$events[name], fn];
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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 | EventEmitter.prototype.addListener = EventEmitter.prototype.on;
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47 |
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48 | |
49 |
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50 |
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51 |
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52 |
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53 |
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54 | EventEmitter.prototype.once = function (name, fn) {
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55 | var self = this;
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56 |
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57 | function on () {
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58 | self.removeListener(name, on);
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59 | fn.apply(this, arguments);
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60 | };
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61 |
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62 | on.listener = fn;
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63 | this.on(name, on);
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64 |
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65 | return this;
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66 | };
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67 |
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68 | |
69 |
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70 |
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71 |
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72 |
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73 |
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74 | EventEmitter.prototype.removeListener = function (name, fn) {
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75 | if (this.$events && this.$events[name]) {
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76 | var list = this.$events[name];
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77 |
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78 | if (io.util.isArray(list)) {
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79 | var pos = -1;
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80 |
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81 | for (var i = 0, l = list.length; i < l; i++) {
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82 | if (list[i] === fn || (list[i].listener && list[i].listener === fn)) {
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83 | pos = i;
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84 | break;
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85 | }
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86 | }
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87 |
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88 | if (pos < 0) {
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89 | return this;
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90 | }
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91 |
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92 | list.splice(pos, 1);
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93 |
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94 | if (!list.length) {
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95 | delete this.$events[name];
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96 | }
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97 | } else if (list === fn || (list.listener && list.listener === fn)) {
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98 | delete this.$events[name];
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99 | }
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100 | }
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101 |
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102 | return this;
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103 | };
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104 |
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105 | |
106 |
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107 |
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108 |
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109 |
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110 |
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111 | EventEmitter.prototype.removeAllListeners = function (name) {
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112 |
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113 |
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114 |
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115 |
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116 |
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117 |
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118 | if (this.$events && this.$events[name]) {
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119 | this.$events[name] = null;
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120 | }
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121 |
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122 | return this;
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123 | };
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124 |
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125 | |
126 |
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127 |
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128 |
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129 |
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130 |
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131 | EventEmitter.prototype.listeners = function (name) {
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132 | if (!this.$events) {
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133 | this.$events = {};
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134 | }
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135 |
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136 | if (!this.$events[name]) {
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137 | this.$events[name] = [];
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138 | }
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139 |
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140 | if (!io.util.isArray(this.$events[name])) {
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141 | this.$events[name] = [this.$events[name]];
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142 | }
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143 |
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144 | return this.$events[name];
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145 | };
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146 |
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147 | |
148 |
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149 |
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150 |
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151 |
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152 |
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153 | EventEmitter.prototype.emit = function (name) {
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154 | if (!this.$events) {
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155 | return false;
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156 | }
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157 |
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158 | var handler = this.$events[name];
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159 |
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160 | if (!handler) {
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161 | return false;
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162 | }
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163 |
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164 | var args = Array.prototype.slice.call(arguments, 1);
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165 |
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166 | if ('function' == typeof handler) {
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167 | handler.apply(this, args);
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168 | } else if (io.util.isArray(handler)) {
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169 | var listeners = handler.slice();
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170 |
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171 | for (var i = 0, l = listeners.length; i < l; i++) {
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172 | listeners[i].apply(this, args);
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173 | }
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174 | } else {
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175 | return false;
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176 | }
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177 |
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178 | return true;
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179 | };
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180 |
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181 | })(
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182 | 'undefined' != typeof io ? io : module.exports
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183 | , 'undefined' != typeof io ? io : module.parent.exports
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184 | );
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