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ab6e6b7baa
Differential Revision: https://phabricator.services.mozilla.com/D18996 --HG-- extra : moz-landing-system : lando
62 lines
1.6 KiB
JavaScript
62 lines
1.6 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* globals Services */
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this.EveryWindow = {
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_callbacks: new Map(),
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_initialized: false,
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registerCallback: function EW_registerCallback(id, init, uninit) {
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if (this._callbacks.has(id)) {
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return;
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}
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this._callForEveryWindow(init);
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this._callbacks.set(id, {id, init, uninit});
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if (!this._initialized) {
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Services.obs.addObserver(this._onOpenWindow.bind(this),
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"browser-delayed-startup-finished");
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this._initialized = true;
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}
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},
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unregisterCallback: function EW_unregisterCallback(aId, aCallUninit = true) {
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if (!this._callbacks.has(aId)) {
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return;
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}
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if (aCallUninit) {
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this._callForEveryWindow(this._callbacks.get(aId).uninit);
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}
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this._callbacks.delete(aId);
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},
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_callForEveryWindow(aFunction) {
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let windowList = Services.wm.getEnumerator("navigator:browser");
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while (windowList.hasMoreElements()) {
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let win = windowList.getNext();
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win.delayedStartupPromise.then(() => { aFunction(win); });
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}
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},
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_onOpenWindow(aWindow) {
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for (let c of this._callbacks.values()) {
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c.init(aWindow);
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}
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aWindow.addEventListener("unload",
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this._onWindowClosing.bind(this),
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{ once: true });
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},
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_onWindowClosing(aEvent) {
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let win = aEvent.target;
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for (let c of this._callbacks.values()) {
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c.uninit(win);
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}
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},
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};
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