matting-editor/lib/base/events.js

matting-editor

'use strict';

Object.defineProperty(exports, "__esModule", {
    value: true
});

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

var eventBusName = '_eventBus';
var eventsName = '$events';

var getRootConstructor = function getRootConstructor(ctx) {
    var Ctor = ctx.constructor;
    while (Ctor.super) {
        Ctor = Ctor.super;
    }

    return Ctor;
};

exports.default = {
    computed: _defineProperty({}, eventsName, function () {
        var vm = this;

        while (vm && !vm.hasOwnProperty(eventBusName)) {
            vm = vm.$parent;
        }

        return vm && vm[eventBusName] || this.$createEvents();
    }),
    methods: {
        $createEvents: function $createEvents() {
            if (!this.hasOwnProperty(eventBusName)) {
                var Events = getRootConstructor(this);

                this[eventBusName] = new Events();
            }

            return this[eventBusName];
        }
    }
};