react-native-canvas/dist/Bus.js

A Canvas component for React Native

"use strict";
/**
 * @typedef {Object} Message
 * @property {string} id
 */
Object.defineProperty(exports, "__esModule", { value: true });
var Bus = /** @class */ (function () {
    /**
     * @param {function} send
     */
    function Bus(send) {
        this._paused = false;
        /**
         * @type {Object.<string, function>}
         */
        this._messageListeners = {};
        /**
         * @type {Message[]}
         */
        this._queue = [];
        this._send = send;
    }
    /**
     * @param {Message} message
     * @return {Promise.<Message>}
     */
    Bus.prototype.post = function (message) {
        var _this = this;
        return new Promise(function (resolve) {
            /**
             * Currently, 'set' is the only message type that's not resolved
             * back to the caller. If we store it here, it will leak memory
             * because the entry won't get removed from this._messageListeners.
             */
            if (message.type !== "set") {
                _this._messageListeners[message.id] = resolve;
            }
            if (!_this._paused) {
                _this._send(message);
            }
            else {
                _this._queue.push(message);
            }
        });
    };
    /**
     * @param {Message} message
     * @return {void}
     */
    Bus.prototype.handle = function (message) {
        var handler = this._messageListeners[message.id];
        // Delete the message listener from the cache as soon as it's handled.
        delete this._messageListeners[message.id];
        if (handler) {
            handler(message);
        }
        else {
            console.warn("Received unexpected message", message);
        }
    };
    /**
     * @returns {void}
     */
    Bus.prototype.pause = function () {
        this._paused = true;
    };
    /**
     * @returns {void}
     */
    Bus.prototype.resume = function () {
        this._paused = false;
        this._send(this._queue);
        this._queue = [];
    };
    return Bus;
}());
exports.default = Bus;