forked from mirrors/gecko-dev
1534b7a30a
MozReview-Commit-ID: 4psqXfT1w2p --HG-- extra : rebase_source : 1fdf62f5130ab994112aa37730a95c8620c99138
49 lines
1.8 KiB
JavaScript
49 lines
1.8 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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"use strict";
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Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
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XPCOMUtils.defineLazyServiceGetter(this, "aboutNewTabService",
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"@mozilla.org/browser/aboutnewtab-service;1",
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"nsIAboutNewTabService");
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// Bug 1320736 tracks creating a generic precedence manager for handling
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// multiple addons modifying the same properties, and bug 1330494 has been filed
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// to track utilizing this manager for chrome_url_overrides. Until those land,
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// the edge cases surrounding multiple addons using chrome_url_overrides will
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// be ignored and precedence will be first come, first serve.
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let overrides = {
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// A queue of extensions in line to override the newtab page (sorted oldest to newest).
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newtab: [],
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};
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/* eslint-disable mozilla/balanced-listeners */
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extensions.on("manifest_chrome_url_overrides", (type, directive, extension, manifest) => {
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if (manifest.chrome_url_overrides.newtab) {
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let newtab = manifest.chrome_url_overrides.newtab;
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let url = extension.baseURI.resolve(newtab);
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// Only set the newtab URL if no other extension is overriding it.
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if (!overrides.newtab.length) {
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aboutNewTabService.newTabURL = url;
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}
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overrides.newtab.push({extension, url});
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}
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});
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extensions.on("shutdown", (type, extension) => {
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let i = overrides.newtab.findIndex(o => o.extension === extension);
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if (i !== -1) {
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overrides.newtab.splice(i, 1);
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if (overrides.newtab.length) {
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aboutNewTabService.newTabURL = overrides.newtab[0].url;
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} else {
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aboutNewTabService.resetNewTabURL();
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}
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}
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});
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/* eslint-enable mozilla/balanced-listeners */
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