91 lines
2.5 KiB
JavaScript
91 lines
2.5 KiB
JavaScript
// -*- indent-tabs-mode: nil; js-indent-level: 2 -*-
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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 file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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// This file and Readability-readerable.js are merged together into
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// Readerable.jsm.
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/* exported Readerable */
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/* import-globals-from Readability-readerable.js */
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const { classes: Cc, interfaces: Ci, utils: Cu } = Components;
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Cu.import("resource://gre/modules/Services.jsm");
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Cu.import("resource://gre/modules/XPCOMUtils.jsm");
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function isNodeVisible(node) {
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return node.clientHeight > 0 && node.clientWidth > 0;
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}
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var Readerable = {
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isEnabled: true,
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isForceEnabled: false,
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get isEnabledForParseOnLoad() {
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return this.isEnabled || this.isForceEnabled;
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},
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/**
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* Decides whether or not a document is reader-able without parsing the whole thing.
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*
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* @param doc A document to parse.
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* @return boolean Whether or not we should show the reader mode button.
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*/
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isProbablyReaderable(doc) {
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// Only care about 'real' HTML documents:
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if (doc.mozSyntheticDocument || !(doc instanceof doc.defaultView.HTMLDocument)) {
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return false;
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}
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let uri = Services.io.newURI(doc.location.href, null, null);
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if (!this.shouldCheckUri(uri)) {
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return false;
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}
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return isProbablyReaderable(doc, isNodeVisible);
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},
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_blockedHosts: [
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"amazon.com",
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"github.com",
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"mail.google.com",
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"pinterest.com",
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"reddit.com",
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"twitter.com",
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"youtube.com",
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],
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shouldCheckUri(uri, isBaseUri = false) {
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if (!(uri.schemeIs("http") || uri.schemeIs("https"))) {
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return false;
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}
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if (!isBaseUri) {
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// Sadly, some high-profile pages have false positives, so bail early for those:
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let asciiHost = uri.asciiHost;
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if (this._blockedHosts.some(blockedHost => asciiHost.endsWith(blockedHost))) {
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return false;
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}
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if (uri.filePath == "/") {
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return false;
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}
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}
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return true;
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},
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observe: function(aMessage, aTopic, aData) {
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switch(aTopic) {
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case "nsPref:changed":
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if (aData === "reader.parse-on-load.enabled") {
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this.isEnabled = Services.prefs.getBoolPref(aData);
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} else if (aData === "reader.parse-on-load.force-enabled") {
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this.isForceEnabled = Services.prefs.getBoolPref(aData);
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}
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break;
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}
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}
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};
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Services.prefs.addObserver("reader.parse-on-load.", Readerable, false);
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