Move Add-on SDK source to toolkit/jetpack

addon-sdk/source/lib/sdk/event/target.js

@@ -1,74 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-'use strict';
-
-module.metadata = {
-  "stability": "stable"
-};
-
-const { on, once, off, setListeners } = require('./core');
-const { method, chainable } = require('../lang/functional/core');
-const { Class } = require('../core/heritage');
-
-/**
- * `EventTarget` is an exemplar for creating an objects that can be used to
- * add / remove event listeners on them. Events on these objects may be emitted
- * via `emit` function exported by 'event/core' module.
- */
-const EventTarget = Class({
-  /**
-   * Method initializes `this` event source. It goes through properties of a
-   * given `options` and registers listeners for the ones that look like an
-   * event listeners.
-   */
-  /**
-   * Method initializes `this` event source. It goes through properties of a
-   * given `options` and registers listeners for the ones that look like an
-   * event listeners.
-   */
-  initialize: function initialize(options) {
-    setListeners(this, options);
-  },
-  /**
-   * Registers an event `listener` that is called every time events of
-   * specified `type` are emitted.
-   * @param {String} type
-   *    The type of event.
-   * @param {Function} listener
-   *    The listener function that processes the event.
-   * @example
-   *      worker.on('message', function (data) {
-   *        console.log('data received: ' + data)
-   *      })
-   */
-  on: chainable(method(on)),
-  /**
-   * Registers an event `listener` that is called once the next time an event
-   * of the specified `type` is emitted.
-   * @param {String} type
-   *    The type of the event.
-   * @param {Function} listener
-   *    The listener function that processes the event.
-   */
-  once: chainable(method(once)),
-  /**
-   * Removes an event `listener` for the given event `type`.
-   * @param {String} type
-   *    The type of event.
-   * @param {Function} listener
-   *    The listener function that processes the event.
-   */
-  removeListener: function removeListener(type, listener) {
-    // Note: We can't just wrap `off` in `method` as we do it for other methods
-    // cause skipping a second or third argument will behave very differently
-    // than intended. This way we make sure all arguments are passed and only
-    // one listener is removed at most.
-    off(this, type, listener);
-    return this;
-  },
-  // but we can wrap `off` here, as the semantics are the same
-  off: chainable(method(off))
-
-});
-exports.EventTarget = EventTarget;