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Move Add-on SDK source to toolkit/jetpack

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NTD 2018-02-09 06:46:43 -05:00 • committed by Roy Tam
commit 23b67db438
993 changed files with 484 additions and 100663 deletions
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addon-sdk/source/lib/sdk/tab/events.js
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/* 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";
// This module provides temporary shim until Bug 843901 is shipped.
// It basically registers tab event listeners on all windows that get
// opened and forwards them through observer notifications.
module.metadata = {
"stability": "experimental"
};
const { Ci } = require("chrome");
const { windows, isInteractive } = require("../window/utils");
const { events } = require("../browser/events");
const { open } = require("../event/dom");
const { filter, map, merge, expand } = require("../event/utils");
const isFennec = require("sdk/system/xul-app").is("Fennec");
// Module provides event stream (in nodejs style) that emits data events
// for all the tab events that happen in running firefox. At the moment
// it does it by registering listeners on all browser windows and then
// forwarding events when they occur to a stream. This will become obsolete
// once Bug 843901 is fixed, and we'll just leverage observer notifications.
// Set of tab events that this module going to aggregate and expose.
const TYPES = ["TabOpen","TabClose","TabSelect","TabMove","TabPinned",
"TabUnpinned"];
// Utility function that given a browser `window` returns stream of above
// defined tab events for all tabs on the given window.
function tabEventsFor(window) {
// Map supported event types to a streams of those events on the given
// `window` and than merge these streams into single form stream off
// all events.
let channels = TYPES.map(type => open(window, type));
return merge(channels);
}
// Create our event channels. We do this in a separate function to
// minimize the chance of leaking intermediate objects on the global.
function makeEvents() {
// Filter DOMContentLoaded events from all the browser events.
var readyEvents = filter(events, e => e.type === "DOMContentLoaded");
// Map DOMContentLoaded events to it's target browser windows.
var futureWindows = map(readyEvents, e => e.target);
// Expand all browsers that will become interactive to supported tab events
// on these windows. Result will be a tab events from all tabs of all windows
// that will become interactive.
var eventsFromFuture = expand(futureWindows, tabEventsFor);
// Above covers only windows that will become interactive in a future, but some
// windows may already be interactive so we pick those and expand to supported
// tab events for them too.
var interactiveWindows = windows("navigator:browser", { includePrivate: true }).
filter(isInteractive);
var eventsFromInteractive = merge(interactiveWindows.map(tabEventsFor));
// Finally merge stream of tab events from future windows and current windows
// to cover all tab events on all windows that will open.
return merge([eventsFromInteractive, eventsFromFuture]);
}
// Map events to Fennec format if necessary
exports.events = map(makeEvents(), function (event) {
return !isFennec ? event : {
type: event.type,
target: event.target.ownerDocument.defaultView.BrowserApp
.getTabForBrowser(event.target)
};
});