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Diffstat (limited to 'addon-sdk/source/lib/sdk/window/events.js')
-rw-r--r-- | addon-sdk/source/lib/sdk/window/events.js | 68 |
1 files changed, 0 insertions, 68 deletions
diff --git a/addon-sdk/source/lib/sdk/window/events.js b/addon-sdk/source/lib/sdk/window/events.js deleted file mode 100644 index b1d3a1f3e..000000000 --- a/addon-sdk/source/lib/sdk/window/events.js +++ /dev/null @@ -1,68 +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 { Ci, Cu } = require("chrome"); -const { observe } = require("../event/chrome"); -const { open } = require("../event/dom"); -const { windows } = require("../window/utils"); -const { filter, merge, map, expand } = require("../event/utils"); - -function documentMatches(weakWindow, event) { - let window = weakWindow.get(); - return window && event.target === window.document; -} - -function makeStrictDocumentFilter(window) { - // Note: Do not define a closure within this function. Otherwise - // you may leak the window argument. - let weak = Cu.getWeakReference(window); - return documentMatches.bind(null, weak); -} - -function toEventWithDefaultViewTarget({type, target}) { - return { type: type, target: target.defaultView } -} - -// Function registers single shot event listeners for relevant window events -// that forward events to exported event stream. -function eventsFor(window) { - // NOTE: Do no use pass a closure from this function into a stream - // transform function. You will capture the window in the - // closure and leak the window until the event stream is - // completely closed. - let interactive = open(window, "DOMContentLoaded", { capture: true }); - let complete = open(window, "load", { capture: true }); - let states = merge([interactive, complete]); - let changes = filter(states, makeStrictDocumentFilter(window)); - return map(changes, toEventWithDefaultViewTarget); -} - -// Create our event channels. We do this in a separate function to -// minimize the chance of leaking intermediate objects on the global. -function makeEvents() { - // In addition to observing windows that are open we also observe windows - // that are already already opened in case they're in process of loading. - var opened = windows(null, { includePrivate: true }); - var currentEvents = merge(opened.map(eventsFor)); - - // Register system event listeners for top level window open / close. - function rename({type, target, data}) { - return { type: rename[type], target: target, data: data } - } - rename.domwindowopened = "open"; - rename.domwindowclosed = "close"; - - var openEvents = map(observe("domwindowopened"), rename); - var closeEvents = map(observe("domwindowclosed"), rename); - var futureEvents = expand(openEvents, ({target}) => eventsFor(target)); - - return merge([currentEvents, futureEvents, openEvents, closeEvents]); -} - -exports.events = makeEvents(); |