mirror of https://github.com/node-red/node-red.git
49 lines
1.3 KiB
JavaScript
49 lines
1.3 KiB
JavaScript
/**
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* Copyright 2015 IBM Corp.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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**/
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RED.events = (function() {
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var handlers = {};
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function on(evt,func) {
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handlers[evt] = handlers[evt]||[];
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handlers[evt].push(func);
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}
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function off(evt,func) {
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var handler = handlers[evt];
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if (handler) {
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for (var i=0;i<handler.length;i++) {
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if (handler[i] === func) {
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handler.splice(i,1);
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return;
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}
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}
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}
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}
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function emit(evt,arg) {
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if (handlers[evt]) {
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for (var i=0;i<handlers[evt].length;i++) {
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handlers[evt][i](arg);
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}
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}
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}
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return {
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on: on,
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off: off,
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emit: emit
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}
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})();
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