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// -*- indent-tabs-mode: nil; js-indent-level: 2 -*-
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
// This file and Readability-readerable.js are merged together into
// Readerable.sys.mjs.
/* exported Readerable */
/* import-globals-from readability/Readability-readerable.js */
const { XPCOMUtils } = ChromeUtils.importESModule(
"resource://gre/modules/XPCOMUtils.sys.mjs"
);
var Readerable = {
get isEnabledForParseOnLoad() {
return this.isEnabled;
},
/**
* Decides whether or not a document is reader-able without parsing the whole thing.
*
* @param doc A document to parse.
* @return boolean Whether or not we should show the reader mode button.
*/
isProbablyReaderable(doc) {
// Only care about 'real' HTML documents:
if (
doc.mozSyntheticDocument ||
!doc.defaultView.HTMLDocument.isInstance(doc)
) {
return false;
}
let uri = Services.io.newURI(doc.location.href);
if (!this.shouldCheckUri(uri)) {
return false;
}
return isProbablyReaderable(doc, this._isNodeVisible);
},
_isNodeVisible(node) {
return node.clientHeight > 0 && node.clientWidth > 0;
},
_blockedHosts: [
"amazon.com",
"github.com",
"mail.google.com",
"pinterest.com",
"reddit.com",
"twitter.com",
"youtube.com",
"app.slack.com",
],
shouldCheckUri(uri, isBaseUri = false) {
if (!["http", "https", "file", "moz-nullprincipal"].includes(uri.scheme)) {
return false;
}
if (!isBaseUri && uri.scheme.startsWith("http")) {
// Sadly, some high-profile pages have false positives, so bail early for those:
let { host } = uri;
if (this._blockedHosts.some(blockedHost => host.endsWith(blockedHost))) {
// Allow github on non-project pages
if (
host == "github.com" &&
!uri.filePath.includes("/projects") &&
!uri.filePath.includes("/issues")
) {
return true;
}
return false;
}
if (uri.filePath == "/") {
return false;
}
}
return true;
},
};
XPCOMUtils.defineLazyPreferenceGetter(
Readerable,
"isEnabled",
"reader.parse-on-load.enabled",
true
);
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