1 files changed, 71 insertions, 0 deletions
diff --git a/tools/addon-sdk-1.5/packages/api-utils/lib/utils/data.js b/tools/addon-sdk-1.5/packages/api-utils/lib/utils/data.js
new file mode 100644
index 0000000..33356cd
--- /dev/null
+++ b/tools/addon-sdk-1.5/packages/api-utils/lib/utils/data.js
@@ -0,0 +1,71 @@
+/* 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";
+
+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);
+
+const { NetUtil } = Cu.import("resource://gre/modules/NetUtil.jsm");
+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;