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/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Jetpack.
*
* The Initial Developer of the Original Code is
* the Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Irakli Gozalishvili <gozala@mozilla.com> (Original Author)
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
"use strict";
const { Cc, Ci, Cu } = require("chrome");
const IOService = Cc["@mozilla.org/network/io-service;1"].
getService(Ci.nsIIOService);
const AppShellService = Cc["@mozilla.org/appshell/appShellService;1"].
getService(Ci.nsIAppShellService);
Cu.import("resource://gre/modules/NetUtil.jsm", this);
const FaviconService = Cc["@mozilla.org/browser/favicon-service;1"].
getService(Ci.nsIFaviconService);
const PNG_B64 = "data:image/png;base64,";
const DEF_FAVICON_URI = "chrome://mozapps/skin/places/defaultFavicon.png";
let DEF_FAVICON = null;
/**
* Takes URI of the page and returns associated favicon URI.
* If page under passed uri has no favicon then base64 encoded data URI of
* default faveicon is returned.
* @param {String} uri
* @returns {String}
*/
exports.getFaviconURIForLocation = function getFaviconURIForLocation(uri) {
let pageURI = NetUtil.newURI(uri);
try {
return FaviconService.getFaviconDataAsDataURL(
FaviconService.getFaviconForPage(pageURI));
}
catch(e) {
if (!DEF_FAVICON) {
DEF_FAVICON = PNG_B64 +
base64Encode(getChromeURIContent(DEF_FAVICON_URI));
}
return DEF_FAVICON;
}
}
/**
* Takes chrome URI and returns content under that URI.
* @param {String} chromeURI
* @returns {String}
*/
function getChromeURIContent(chromeURI) {
let channel = IOService.newChannel(chromeURI, null, null);
let input = channel.open();
let stream = Cc["@mozilla.org/binaryinputstream;1"].
createInstance(Ci.nsIBinaryInputStream);
stream.setInputStream(input);
let content = stream.readBytes(input.available());
stream.close();
input.close();
return content;
}
exports.getChromeURIContent = getChromeURIContent;
/**
* Creates a base-64 encoded ASCII string from a string of binary data.
*/
function base64Encode(data) AppShellService.hiddenDOMWindow.btoa(String(data));
exports.base64Encode = base64Encode;
/**
* Decodes a string of data which has been encoded using base-64 encoding.
*/
function base64Decode(data) AppShellService.hiddenDOMWindow.atob(String(data));
exports.base64Decode = base64Decode;
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