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Issue 29375915: Issue 4878 - Start using ESLint for adblockpluscore (Closed)
Patch Set: Addressed further feedback from Sebastian Created Feb. 21, 2017, 10:35 a.m.
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1 /* 1 /*
2 * This file is part of Adblock Plus <https://adblockplus.org/>, 2 * This file is part of Adblock Plus <https://adblockplus.org/>,
3 * Copyright (C) 2006-2016 Eyeo GmbH 3 * Copyright (C) 2006-2016 Eyeo GmbH
4 * 4 *
5 * Adblock Plus is free software: you can redistribute it and/or modify 5 * Adblock Plus is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 3 as 6 * it under the terms of the GNU General Public License version 3 as
7 * published by the Free Software Foundation. 7 * published by the Free Software Foundation.
8 * 8 *
9 * Adblock Plus is distributed in the hope that it will be useful, 9 * Adblock Plus is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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27 this._listeners = Object.create(null); 27 this._listeners = Object.create(null);
28 }; 28 };
29 29
30 exports.EventEmitter.prototype = { 30 exports.EventEmitter.prototype = {
31 /** 31 /**
32 * Adds a listener for the specified event name. 32 * Adds a listener for the specified event name.
33 * 33 *
34 * @param {string} name 34 * @param {string} name
35 * @param {function} listener 35 * @param {function} listener
36 */ 36 */
37 on: function(name, listener) 37 on(name, listener)
38 { 38 {
39 if (name in this._listeners) 39 if (name in this._listeners)
40 this._listeners[name].push(listener); 40 this._listeners[name].push(listener);
41 else 41 else
42 this._listeners[name] = [listener]; 42 this._listeners[name] = [listener];
43 }, 43 },
44 44
45 /** 45 /**
46 * Removes a listener for the specified event name. 46 * Removes a listener for the specified event name.
47 * 47 *
48 * @param {string} name 48 * @param {string} name
49 * @param {function} listener 49 * @param {function} listener
50 */ 50 */
51 off: function(name, listener) 51 off(name, listener)
52 { 52 {
53 let listeners = this._listeners[name]; 53 let listeners = this._listeners[name];
54 if (listeners) 54 if (listeners)
55 { 55 {
56 let idx = listeners.indexOf(listener); 56 let idx = listeners.indexOf(listener);
57 if (idx != -1) 57 if (idx != -1)
58 listeners.splice(idx, 1); 58 listeners.splice(idx, 1);
59 } 59 }
60 }, 60 },
61 61
62 /** 62 /**
63 * Adds a one time listener and returns a promise that 63 * Adds a one time listener and returns a promise that
64 * is resolved the next time the specified event is emitted. 64 * is resolved the next time the specified event is emitted.
65 * 65 * @param {string} name
66 * @return {Promise} 66 * @return {Promise}
67 */ 67 */
68 once: function(name) 68 once(name)
69 { 69 {
70 return new Promise(resolve => 70 return new Promise(resolve =>
71 { 71 {
72 let listener = () => 72 let listener = () =>
73 { 73 {
74 this.off(name, listener); 74 this.off(name, listener);
75 resolve(); 75 resolve();
76 }; 76 };
77 77
78 this.on(name, listener); 78 this.on(name, listener);
79 }); 79 });
80 }, 80 },
81 81
82 /** 82 /**
83 * Returns a copy of the array of listeners for the specified event. 83 * Returns a copy of the array of listeners for the specified event.
84 * 84 *
85 * @param {string} name 85 * @param {string} name
86 * @return {function[]} 86 * @return {function[]}
87 */ 87 */
88 listeners: function(name) 88 listeners(name)
89 { 89 {
90 let listeners = this._listeners[name]; 90 let listeners = this._listeners[name];
91 return listeners ? listeners.slice() : []; 91 return listeners ? listeners.slice() : [];
92 }, 92 },
93 93
94 /** 94 /**
95 * Calls all previously added listeners for the given event name. 95 * Calls all previously added listeners for the given event name.
96 * 96 *
97 * @param {string} name 97 * @param {string} name
98 * @param {...*} [arg] 98 * @param {...*} [arg]
99 */ 99 */
100 emit: function(name) 100 emit(name, ...args)
101 { 101 {
102 let args = [];
103 for (let i = 1; i < arguments.length; i++)
104 args.push(arguments[i]);
105
106 let listeners = this.listeners(name); 102 let listeners = this.listeners(name);
107 for (let listener of listeners) 103 for (let listener of listeners)
108 listener.apply(null, args); 104 listener(...args);
109 } 105 }
110 }; 106 };
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