61 lines
1.7 KiB
JavaScript
61 lines
1.7 KiB
JavaScript
/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et: */
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/* 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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"use strict";
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module.metadata = {
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"stability": "experimental"
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};
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const { Ci } = require("chrome");
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const method = require("method/core");
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const { add, remove, iterator } = require("../lang/weak-set");
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let getTargetWindow = method("getTargetWindow");
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getTargetWindow.define(function (target) {
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if (target instanceof Ci.nsIDOMWindow)
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return target;
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if (target instanceof Ci.nsIDOMDocument)
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return target.defaultView || null;
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return null;
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});
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exports.getTargetWindow = getTargetWindow;
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let attachTo = method("attachTo");
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exports.attachTo = attachTo;
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let detachFrom = method("detatchFrom");
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exports.detachFrom = detachFrom;
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function attach(modification, target) {
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let window = getTargetWindow(target);
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attachTo(modification, window);
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// modification are stored per content; `window` reference can still be the
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// same even if the content is changed, therefore `document` is used instead.
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add(modification, window.document);
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}
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exports.attach = attach;
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function detach(modification, target) {
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if (target) {
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let window = getTargetWindow(target);
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detachFrom(modification, window);
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remove(modification, window.document);
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}
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else {
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let documents = iterator(modification);
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for (let document of documents) {
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detachFrom(modification, document.defaultView);
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remove(modification, document);
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}
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}
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}
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exports.detach = detach;
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