Mercurial > addons > firefox-addons > feed-preview

annotate content_scripts/feed-probe.js @ 66:744652abc028 version-13

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Release version 13
author Guido Berhoerster <guido+feed-preview@berhoerster.name>
date Tue, 20 Apr 2021 17:12:47 +0200
parents ede87e1004f9
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1 /*
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2 * Copyright (C) 2018 Guido Berhoerster <guido+feed-preview@berhoerster.name>
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3 *
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4 * This Source Code Form is subject to the terms of the Mozilla Public
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5 * License, v. 2.0. If a copy of the MPL was not distributed with this
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6 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
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7 */
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8
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9 'use strict';
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11 function getFeeds() {
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12 let urlsFeeds = new Map();
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13 let elements = document.querySelectorAll(':-moz-any(link, a)[href]' +
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14 '[rel~=alternate]:-moz-any([type="application/atom+xml"], ' +
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15 '[type="application/rss+xml"])');
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17 for (let element of elements) {
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18 if (element.href === document.URL) {
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19 // do not indicate the availability of a feed if the current
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20 // document is already a feed preview
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21 continue;
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22 }
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24 if (!element.href.match(/^https?:\/\//)) {
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25 continue;
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26 }
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28 urlsFeeds.set(element.href, {
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29 href: element.href,
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30 title: element.title || browser.i18n.getMessage('defaultFeedTitle'),
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31 type: element.type
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32 });
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33 }
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35 return Array.from(urlsFeeds.values());
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36 }
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37
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38 browser.runtime.onMessage.addListener((request, sender, sendResponse) => {
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39 // background page querying available feeds
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40 sendResponse(getFeeds());
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41 });