michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: "use strict";
michael@0: 
michael@0: module.metadata = {
michael@0:   "stability": "unstable"
michael@0: };
michael@0: 
michael@0: const { Cc, Ci, Cu } = require("chrome");
michael@0: const base64 = require("../base64");
michael@0: const IOService = Cc["@mozilla.org/network/io-service;1"].
michael@0:   getService(Ci.nsIIOService);
michael@0: 
michael@0: const { deprecateFunction } = require('../util/deprecate');
michael@0: const { NetUtil } = Cu.import("resource://gre/modules/NetUtil.jsm");
michael@0: const FaviconService = Cc["@mozilla.org/browser/favicon-service;1"].
michael@0:                           getService(Ci.nsIFaviconService);
michael@0: 
michael@0: const PNG_B64 = "data:image/png;base64,";
michael@0: const DEF_FAVICON_URI = "chrome://mozapps/skin/places/defaultFavicon.png";
michael@0: let   DEF_FAVICON = null;
michael@0: 
michael@0: /**
michael@0:  * Takes URI of the page and returns associated favicon URI.
michael@0:  * If page under passed uri has no favicon then base64 encoded data URI of
michael@0:  * default faveicon is returned.
michael@0:  * @param {String} uri
michael@0:  * @returns {String}
michael@0:  */
michael@0: function getFaviconURIForLocation(uri) {
michael@0:   let pageURI = NetUtil.newURI(uri);
michael@0:   try {
michael@0:     return FaviconService.getFaviconDataAsDataURL(
michael@0:                   FaviconService.getFaviconForPage(pageURI));
michael@0:   }
michael@0:   catch(e) {
michael@0:     if (!DEF_FAVICON) {
michael@0:       DEF_FAVICON = PNG_B64 +
michael@0:                     base64.encode(getChromeURIContent(DEF_FAVICON_URI));
michael@0:     }
michael@0:     return DEF_FAVICON;
michael@0:   }
michael@0: }
michael@0: exports.getFaviconURIForLocation = getFaviconURIForLocation;
michael@0: 
michael@0: /**
michael@0:  * Takes chrome URI and returns content under that URI.
michael@0:  * @param {String} chromeURI
michael@0:  * @returns {String}
michael@0:  */
michael@0: function getChromeURIContent(chromeURI) {
michael@0:   let channel = IOService.newChannel(chromeURI, null, null);
michael@0:   let input = channel.open();
michael@0:   let stream = Cc["@mozilla.org/binaryinputstream;1"].
michael@0:                 createInstance(Ci.nsIBinaryInputStream);
michael@0:   stream.setInputStream(input);
michael@0:   let content = stream.readBytes(input.available());
michael@0:   stream.close();
michael@0:   input.close();
michael@0:   return content;
michael@0: }
michael@0: exports.getChromeURIContent = deprecateFunction(getChromeURIContent,
michael@0:   'getChromeURIContent is deprecated, ' +
michael@0:   'please use require("sdk/net/url").readURI instead.'
michael@0: );
michael@0: 
michael@0: /**
michael@0:  * Creates a base-64 encoded ASCII string from a string of binary data.
michael@0:  */
michael@0: exports.base64Encode = deprecateFunction(base64.encode,
michael@0:   'base64Encode is deprecated, ' +
michael@0:   'please use require("sdk/base64").encode instead.'
michael@0: );
michael@0: /**
michael@0:  * Decodes a string of data which has been encoded using base-64 encoding.
michael@0:  */
michael@0: exports.base64Decode = deprecateFunction(base64.decode,
michael@0:   'base64Dencode is deprecated, ' +
michael@0:   'please use require("sdk/base64").decode instead.'
michael@0: );