devextreme/cjs/__internal/core/m_events_strategy.js

HTML5 JavaScript Component Suite for Responsive Web Development

/**
 * DevExtreme (cjs/__internal/core/m_events_strategy.js)
 * Version: 24.2.6
 * Build date: Mon Mar 17 2025
 *
 * Copyright (c) 2012 - 2025 Developer Express Inc. ALL RIGHTS RESERVED
 * Read about DevExtreme licensing here: https://js.devexpress.com/Licensing/
 */

"use strict";
Object.defineProperty(exports, "__esModule", {
    value: true
});
exports.EventsStrategy = void 0;
var _callbacks = _interopRequireDefault(require("../../core/utils/callbacks"));
var _iterator = require("../../core/utils/iterator");
var _type = require("../../core/utils/type");

function _interopRequireDefault(e) {
    return e && e.__esModule ? e : {
        default: e
    }
}
class EventsStrategy {
    constructor(owner) {
        let options = arguments.length > 1 && void 0 !== arguments[1] ? arguments[1] : {};
        this._events = {};
        this._owner = owner;
        this._options = options
    }
    static create(owner, strategy) {
        if (strategy) {
            return (0, _type.isFunction)(strategy) ? strategy(owner) : strategy
        }
        return new EventsStrategy(owner)
    }
    hasEvent(eventName) {
        const callbacks = this._events[eventName];
        return callbacks ? callbacks.has() : false
    }
    fireEvent(eventName, eventArgs) {
        const callbacks = this._events[eventName];
        if (callbacks) {
            callbacks.fireWith(this._owner, eventArgs)
        }
        return this._owner
    }
    on(eventName, eventHandler) {
        if ((0, _type.isPlainObject)(eventName)) {
            (0, _iterator.each)(eventName, ((e, h) => {
                this.on(e, h)
            }))
        } else {
            let callbacks = this._events[eventName];
            if (!callbacks) {
                callbacks = (0, _callbacks.default)({
                    syncStrategy: this._options.syncStrategy
                });
                this._events[eventName] = callbacks
            }
            const addFn = callbacks.originalAdd || callbacks.add;
            addFn.call(callbacks, eventHandler)
        }
    }
    off(eventName, eventHandler) {
        const callbacks = this._events[eventName];
        if (callbacks) {
            if ((0, _type.isFunction)(eventHandler)) {
                callbacks.remove(eventHandler)
            } else {
                callbacks.empty()
            }
        }
    }
    dispose() {
        (0, _iterator.each)(this._events, ((eventName, event) => {
            event.empty()
        }))
    }
}
exports.EventsStrategy = EventsStrategy;