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-rw-r--r--components/jetpack/sdk/dom/events.js192
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diff --git a/components/jetpack/sdk/dom/events.js b/components/jetpack/sdk/dom/events.js
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--- a/components/jetpack/sdk/dom/events.js
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@@ -1,192 +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": "unstable"
-};
-
-const { Cu } = require("chrome");
-const { ShimWaiver } = Cu.import("resource://gre/modules/ShimWaiver.jsm");
-
-// Utility function that returns copy of the given `text` with last character
-// removed if it is `"s"`.
-function singularify(text) {
- return text[text.length - 1] === "s" ? text.substr(0, text.length - 1) : text;
-}
-
-// Utility function that takes event type, argument is passed to
-// `document.createEvent` and returns name of the initializer method of the
-// given event. Please note that there are some event types whose initializer
-// methods can't be guessed by this function. For more details see following
-// link: https://developer.mozilla.org/En/DOM/Document.createEvent
-function getInitializerName(category) {
- return "init" + singularify(category);
-}
-
-/**
- * Registers an event `listener` on a given `element`, that will be called
- * when events of specified `type` is dispatched on the `element`.
- * @param {Element} element
- * Dom element to register listener on.
- * @param {String} type
- * A string representing the
- * [event type](https://developer.mozilla.org/en/DOM/event.type) to
- * listen for.
- * @param {Function} listener
- * Function that is called whenever an event of the specified `type`
- * occurs.
- * @param {Boolean} capture
- * If true, indicates that the user wishes to initiate capture. After
- * initiating capture, all events of the specified type will be dispatched
- * to the registered listener before being dispatched to any `EventTarget`s
- * beneath it in the DOM tree. Events which are bubbling upward through
- * the tree will not trigger a listener designated to use capture.
- * See [DOM Level 3 Events](http://www.w3.org/TR/DOM-Level-3-Events/#event-flow)
- * for a detailed explanation.
- */
-function on(element, type, listener, capture, shimmed = false) {
- // `capture` defaults to `false`.
- capture = capture || false;
- if (shimmed) {
- element.addEventListener(type, listener, capture);
- } else {
- ShimWaiver.getProperty(element, "addEventListener")(type, listener, capture);
- }
-}
-exports.on = on;
-
-/**
- * Registers an event `listener` on a given `element`, that will be called
- * only once, next time event of specified `type` is dispatched on the
- * `element`.
- * @param {Element} element
- * Dom element to register listener on.
- * @param {String} type
- * A string representing the
- * [event type](https://developer.mozilla.org/en/DOM/event.type) to
- * listen for.
- * @param {Function} listener
- * Function that is called whenever an event of the specified `type`
- * occurs.
- * @param {Boolean} capture
- * If true, indicates that the user wishes to initiate capture. After
- * initiating capture, all events of the specified type will be dispatched
- * to the registered listener before being dispatched to any `EventTarget`s
- * beneath it in the DOM tree. Events which are bubbling upward through
- * the tree will not trigger a listener designated to use capture.
- * See [DOM Level 3 Events](http://www.w3.org/TR/DOM-Level-3-Events/#event-flow)
- * for a detailed explanation.
- */
-function once(element, type, listener, capture, shimmed = false) {
- on(element, type, function selfRemovableListener(event) {
- removeListener(element, type, selfRemovableListener, capture, shimmed);
- listener.apply(this, arguments);
- }, capture, shimmed);
-}
-exports.once = once;
-
-/**
- * Unregisters an event `listener` on a given `element` for the events of the
- * specified `type`.
- *
- * @param {Element} element
- * Dom element to unregister listener from.
- * @param {String} type
- * A string representing the
- * [event type](https://developer.mozilla.org/en/DOM/event.type) to
- * listen for.
- * @param {Function} listener
- * Function that is called whenever an event of the specified `type`
- * occurs.
- * @param {Boolean} capture
- * If true, indicates that the user wishes to initiate capture. After
- * initiating capture, all events of the specified type will be dispatched
- * to the registered listener before being dispatched to any `EventTarget`s
- * beneath it in the DOM tree. Events which are bubbling upward through
- * the tree will not trigger a listener designated to use capture.
- * See [DOM Level 3 Events](http://www.w3.org/TR/DOM-Level-3-Events/#event-flow)
- * for a detailed explanation.
- */
-function removeListener(element, type, listener, capture, shimmed = false) {
- if (shimmed) {
- element.removeEventListener(type, listener, capture);
- } else {
- ShimWaiver.getProperty(element, "removeEventListener")(type, listener, capture);
- }
-}
-exports.removeListener = removeListener;
-
-/**
- * Emits event of the specified `type` and `category` on the given `element`.
- * Specified `settings` are used to initialize event before dispatching it.
- * @param {Element} element
- * Dom element to dispatch event on.
- * @param {String} type
- * A string representing the
- * [event type](https://developer.mozilla.org/en/DOM/event.type).
- * @param {Object} options
- * Options object containing following properties:
- * - `category`: String passed to the `document.createEvent`. Option is
- * optional and defaults to "UIEvents".
- * - `initializer`: If passed it will be used as name of the method used
- * to initialize event. If omitted name will be generated from the
- * `category` field by prefixing it with `"init"` and removing last
- * character if it matches `"s"`.
- * - `settings`: Array of settings that are forwarded to the event
- * initializer after firs `type` argument.
- * @see https://developer.mozilla.org/En/DOM/Document.createEvent
- */
-function emit(element, type, { category, initializer, settings }, shimmed = false) {
- category = category || "UIEvents";
- initializer = initializer || getInitializerName(category);
- let document = element.ownerDocument;
- let event = document.createEvent(category);
- event[initializer].apply(event, [type].concat(settings));
- if (shimmed) {
- element.dispatchEvent(event);
- } else {
- ShimWaiver.getProperty(element, "dispatchEvent")(event);
- }
-};
-exports.emit = emit;
-
-// Takes DOM `element` and returns promise which is resolved
-// when given element is removed from it's parent node.
-const removed = element => {
- return new Promise(resolve => {
- const { MutationObserver } = element.ownerDocument.defaultView;
- const observer = new MutationObserver(mutations => {
- for (let mutation of mutations) {
- for (let node of mutation.removedNodes || []) {
- if (node === element) {
- observer.disconnect();
- resolve(element);
- }
- }
- }
- });
- observer.observe(element.parentNode, {childList: true});
- });
-};
-exports.removed = removed;
-
-const when = (element, eventName, capture=false, shimmed=false) => new Promise(resolve => {
- const listener = event => {
- if (shimmed) {
- element.removeEventListener(eventName, listener, capture);
- } else {
- ShimWaiver.getProperty(element, "removeEventListener")(eventName, listener, capture);
- }
- resolve(event);
- };
-
- if (shimmed) {
- element.addEventListener(eventName, listener, capture);
- } else {
- ShimWaiver.getProperty(element, "addEventListener")(eventName, listener, capture);
- }
-});
-exports.when = when;