Callout is a Firefox extension which delivers an API for web pages and Greasemonkey scripts to notify the user through the notification system of the OS. This would be Growl for Mac OS X users and Windows notifications for Windows users. The extension creates the callout JavaScript object which is usable by both unprivileged JavaScript code and Greasemonkey scripts.
Install the newest version from addons.mozilla.org.
Callout supports Firefox 2.0+ on Windows and Linux and Firefox 3.0+ on Mac OS X. Mac OS X users will also need the Growl notification system. Greasemonkey is only required for userscript support.
Callout makes a callout JavaScript object available for all webpages and Greasemonkey scripts. The method creates a notification titled title and with the message message.
callout.notify(title, message, [options])
The available options are:
icon: with this you can specify an icon for the notification. This should be an URI for the icon. If unspecified the default Callout icon is used.href: this specifies a target page to go to if the user clicks on the notification. This page will be opened in a new tab or window.
// Simple usage
callout.notify('Hello', 'World!');
// Specifying an icon
callout.notify('Hello World!', 'this is a ninja!',
{icon: 'http://icanscale.com/callout/images/ninja.png'});
// Specifying a target page
callout.notify('I Can Scale', 'My blog',
{href: 'http://icanscale.com/'});
There is a more elaborate example in the examples directory for a Greasemonkey script which uses Callout. This script works worked on Digg spy and notified the user of each new digg displayed on the page.
Warning: while this could be useful for the digg addict it is a serious distraction from work. :)
This user script can also be installed from the following address: http://github.com/lackac/callout/raw/master/examples/loudspy.user.js
Note: since the old Digg Spy have been retired this userscript is also defunct. Nevertheless it is a good way to see how a userscript which uses Callout could be written.
Author: László Bácsi
Hungarian blog post: http://lackac.hu/articles/2008/03/26/rendszeruzenetek-firefoxbol-es-turulcsirip-growl
The original idea came from András Bártházi.
Copyright (c) 2008-2009 László Bácsi, released under the Mozilla Public License Version 1.1 (or alternatively GPL 2.0 or LGPL 2.1).