The Tor Browser / file comparison
comparison: addon-sdk/source/lib/sdk/window/events.js
addon-sdk/source/lib/sdk/window/events.js
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| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 "use strict"; | |
| 5 | |
| 6 module.metadata = { | |
| 7 "stability": "unstable" | |
| 8 }; | |
| 9 | |
| 10 const { Ci } = require("chrome"); | |
| 11 const { observe } = require("../event/chrome"); | |
| 12 const { open } = require("../event/dom"); | |
| 13 const { windows } = require("../window/utils"); | |
| 14 const { filter, merge, map, expand } = require("../event/utils"); | |
| 15 | |
| 16 // Function registers single shot event listeners for relevant window events | |
| 17 // that forward events to exported event stream. | |
| 18 function eventsFor(window) { | |
| 19 let interactive = open(window, "DOMContentLoaded", { capture: true }); | |
| 20 let complete = open(window, "load", { capture: true }); | |
| 21 let states = merge([interactive, complete]); | |
| 22 let changes = filter(states, function({target}) target === window.document); | |
| 23 return map(changes, function({type, target}) { | |
| 24 return { type: type, target: target.defaultView } | |
| 25 }); | |
| 26 } | |
| 27 | |
| 28 // In addition to observing windows that are open we also observe windows | |
| 29 // that are already already opened in case they're in process of loading. | |
| 30 let opened = windows(null, { includePrivate: true }); | |
| 31 let currentEvents = merge(opened.map(eventsFor)); | |
| 32 | |
| 33 // Register system event listeners for top level window open / close. | |
| 34 function rename({type, target, data}) { | |
| 35 return { type: rename[type], target: target, data: data } | |
| 36 } | |
| 37 rename.domwindowopened = "open"; | |
| 38 rename.domwindowclosed = "close"; | |
| 39 | |
| 40 let openEvents = map(observe("domwindowopened"), rename); | |
| 41 let closeEvents = map(observe("domwindowclosed"), rename); | |
| 42 let futureEvents = expand(openEvents, function({target}) eventsFor(target)); | |
| 43 | |
| 44 let channel = merge([currentEvents, futureEvents, | |
| 45 openEvents, closeEvents]); | |
| 46 exports.events = channel; |
