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Refactor events module to lib/events.js

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isaacs 2010-04-20 18:13:07 -07:00 committed by Ryan Dahl
parent 4badb227cf
commit 7ff53f4c6a
3 changed files with 76 additions and 74 deletions
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68
lib/events.js
View File

@ -1,4 +1,70 @@
exports.EventEmitter = process.EventEmitter;
exports.Promise = removed('Promise has been removed. See http://groups.google.com/group/nodejs/msg/0c483b891c56fea2 for more information.');
// process.EventEmitter is defined in src/node_events.cc
// process.EventEmitter.prototype.emit() is also defined there.
process.EventEmitter.prototype.addListener = function (type, listener) {
if ('function' !== typeof listener) {
throw new Error('addListener only takes instances of Function');
}
if (!this._events) this._events = {};
// To avoid recursion in the case that type == "newListeners"! Before
// adding it to the listeners, first emit "newListeners".
this.emit("newListener", type, listener);
if (!this._events[type]) {
// Optimize the case of one listener. Don't need the extra array object.
this._events[type] = listener;
} else if (this._events[type] instanceof Array) {
// If we've already got an array, just append.
this._events[type].push(listener);
} else {
// Adding the second element, need to change to array.
this._events[type] = [this._events[type], listener];
}
return this;
};
process.EventEmitter.prototype.removeListener = function (type, listener) {
if ('function' !== typeof listener) {
throw new Error('removeListener only takes instances of Function');
}
// does not use listeners(), so no side effect of creating _events[type]
if (!this._events || !this._events[type]) return this;
var list = this._events[type];
if (list instanceof Array) {
var i = list.indexOf(listener);
if (i < 0) return this;
list.splice(i, 1);
} else {
this._events[type] = null;
}
return this;
};
process.EventEmitter.prototype.removeAllListeners = function (type) {
// does not use listeners(), so no side effect of creating _events[type]
if (!type || !this._events || !this._events[type]) return this;
this._events[type] = null;
};
process.EventEmitter.prototype.listeners = function (type) {
if (!this._events) this._events = {};
if (!this._events[type]) this._events[type] = [];
if (!(this._events[type] instanceof Array)) {
this._events[type] = [this._events[type]];
}
return this._events[type];
};
exports.Promise = function removed () {
throw new Error(
'Promise has been removed. See '+
'http://groups.google.com/group/nodejs/msg/0c483b891c56fea2 for more information.');
}
process.Promise = exports.Promise;

3
src/node.cc
View File

@ -1303,10 +1303,11 @@ static Handle<Value> Binding(const Arguments& args) {
exports->Set(String::New("repl"), String::New(native_repl));
exports->Set(String::New("sys"), String::New(native_sys));
exports->Set(String::New("tcp"), String::New(native_tcp));
exports->Set(String::New("tcp_old"), String::New(native_tcp_old));
exports->Set(String::New("tcp_old"), String::New(native_tcp_old));
exports->Set(String::New("uri"), String::New(native_uri));
exports->Set(String::New("url"), String::New(native_url));
exports->Set(String::New("utils"), String::New(native_utils));
exports->Set(String::New("events"), String::New(native_events));
binding_cache->Set(module, exports);
}

79
src/node.js
View File

@ -103,80 +103,15 @@ process.assert = function (x, msg) {
process.evalcx = process.binding('evals').Script.runInNewContext;
// Event
var eventsModule = createInternalModule('events', function (exports) {
exports.EventEmitter = process.EventEmitter;
// process.EventEmitter is defined in src/node_events.cc
// process.EventEmitter.prototype.emit() is also defined there.
process.EventEmitter.prototype.addListener = function (type, listener) {
if (typeof listener != 'function') {
throw new Error('addListener only takes functions');
}
if (!this._events) this._events = {};
// To avoid recursion in the case that type == "newListeners"! Before
// adding it to the listeners, first emit "newListeners".
this.emit("newListener", type, listener);
if (!this._events[type]) {
// Optimize the case of one listener. Don't need the extra array object.
this._events[type] = listener;
} else if (this._events[type] instanceof Array) {
// If we've already got an array, just append.
this._events[type].push(listener);
} else {
// Adding the second element, need to change to array.
this._events[type] = [this._events[type], listener];
}
return this;
};
process.EventEmitter.prototype.removeListener = function (type, listener) {
if (typeof listener != 'function') {
throw new Error('removeListener only takes functions');
}
// does not use listeners(), so no side effect of creating _events[type]
if (!this._events || !this._events[type]) return this;
var list = this._events[type];
if (list instanceof Array) {
var i = list.indexOf(listener);
if (i < 0) return this;
list.splice(i, 1);
} else {
this._events[type] = null;
}
return this;
};
process.EventEmitter.prototype.removeAllListeners = function (type) {
// does not use listeners(), so no side effect of creating _events[type]
if (!type || !this._events || !this._events[type]) return this;
this._events[type] = null;
};
process.EventEmitter.prototype.listeners = function (type) {
if (!this._events) this._events = {};
if (!this._events[type]) this._events[type] = [];
if (!(this._events[type] instanceof Array)) {
this._events[type] = [this._events[type]];
}
return this._events[type];
};
exports.Promise = removed('Promise has been removed. See http://groups.google.com/group/nodejs/msg/0c483b891c56fea2 for more information.');
process.Promise = exports.Promise;
});
var eventsModule = createInternalModule
( 'events'
, process.compile
( "(function (exports) {" + natives.events + "})"
, "events"
)
);
var events = eventsModule.exports;
// nextTick()
var nextTickQueue = [];