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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.jsm.
/* exported Readerable */
/* import-globals-from Readability-readerable.js */
const { classes: Cc, interfaces: Ci, utils: Cu } = Components;
Cu.import("resource://gre/modules/Services.jsm");
Cu.import("resource://gre/modules/XPCOMUtils.jsm");
function isNodeVisible(node) {
return node.clientHeight > 0 && node.clientWidth > 0;
}
var Readerable = {
DEBUG: 0,
get isEnabledForParseOnLoad() {
delete this.isEnabledForParseOnLoad;
// Listen for future pref changes.
Services.prefs.addObserver("reader.parse-on-load.", this, false);
return this.isEnabledForParseOnLoad = this._getStateForParseOnLoad();
},
_getStateForParseOnLoad() {
let isEnabled = Services.prefs.getBoolPref("reader.parse-on-load.enabled");
let isForceEnabled = Services.prefs.getBoolPref("reader.parse-on-load.force-enabled");
return isForceEnabled || isEnabled;
},
observe(aMessage, aTopic, aData) {
switch (aTopic) {
case "nsPref:changed":
if (aData.startsWith("reader.parse-on-load.")) {
this.isEnabledForParseOnLoad = this._getStateForParseOnLoad();
} else if (aData === "reader.parse-node-limit") {
this.parseNodeLimit = Services.prefs.getIntPref(aData);
}
break;
}
},
log(msg) {
if (this.DEBUG)
dump("Reader: " + msg);
},
/**
* 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 instanceof doc.defaultView.HTMLDocument)) {
return false;
}
let uri = Services.io.newURI(doc.location.href);
if (!this.shouldCheckUri(uri)) {
return false;
}
return isProbablyReaderable(doc, isNodeVisible);
},
_blockedHosts: [
"amazon.com",
"basilisk-browser.org",
"github.com",
"mail.google.com",
"palemoon.org",
"pinterest.com",
"reddit.com",
"twitter.com",
"youtube.com",
],
shouldCheckUri(uri, isBaseUri = false) {
if (!(uri.schemeIs("http") || uri.schemeIs("https"))) {
this.log("Not parsing URI scheme: " + uri.scheme);
return false;
}
try {
uri.QueryInterface(Ci.nsIURL);
} catch (ex) {
// If this doesn't work, presumably the URL is not well-formed or something
return false;
}
// Sadly, some high-profile pages have false positives, so bail early for those:
let asciiHost = uri.asciiHost;
if (!isBaseUri && this._blockedHosts.some(blockedHost => asciiHost.endsWith(blockedHost))) {
return false;
}
if (!isBaseUri && (!uri.filePath || uri.filePath == "/")) {
this.log("Not parsing home page: " + uri.spec);
return false;
}
return true;
},
};
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