mirror of
https://bitbucket.org/wisemapping/wisemapping-frontend.git
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70 lines
2.1 KiB
TypeScript
70 lines
2.1 KiB
TypeScript
/*
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* Copyright [2021] [wisemapping]
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*
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* Licensed under WiseMapping Public License, Version 1.0 (the "License").
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* It is basically the Apache License, Version 2.0 (the "License") plus the
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* "powered by wisemapping" text requirement on every single page;
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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.wisemapping.org/license
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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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class Events {
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protected _handlerByType;
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constructor() {
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this._handlerByType = {};
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}
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static _normalizeEventName(string: string) {
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return string.replace(/^on([A-Z])/, (_full, first) => first.toLowerCase());
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}
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addEvent(typeName: string, fn?, internal?: boolean): Events {
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const type = Events._normalizeEventName(typeName);
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// Add function had not been added yet
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const funByType = this._handlerByType[type] ? this._handlerByType[type] : [];
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if (!funByType.includes(fn)) {
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funByType.push(fn);
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this._handlerByType[type] = funByType;
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}
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// Mark reference ...
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fn.internal = Boolean(internal);
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return this;
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}
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fireEvent(typeName: string, eventArgs?): Events {
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const type = Events._normalizeEventName(typeName);
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const events = this._handlerByType[type];
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if (!events) return this;
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const args = Array.isArray(eventArgs) ? eventArgs : [eventArgs];
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events.forEach((fn) => {
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// Execute our of the main thread...
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fn.apply(this, args);
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});
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return this;
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}
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removeEvent(typeName: string, fn?): Events {
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const type = Events._normalizeEventName(typeName);
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const events = this._handlerByType[type];
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if (events && !fn.internal) {
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const index = events.indexOf(fn);
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if (index !== -1) events.splice(index, 1);
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}
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return this;
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}
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}
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export default Events;
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