48 lines
1.6 KiB
JavaScript
48 lines
1.6 KiB
JavaScript
|
/*!
|
||
|
|
* jQuery Tiny Pub/Sub - v0.6 - 1/10/2011
|
||
|
|
* http://benalman.com/
|
||
|
|
*
|
||
|
|
* Copyright (c) 2010 "Cowboy" Ben Alman
|
||
|
|
* Dual licensed under the MIT and GPL licenses.
|
||
|
|
* http://benalman.com/about/license/
|
||
|
|
*/
|
||
|
|
|
||
|
|
(function($){
|
||
|
|
|
||
|
|
// Create a "dummy" jQuery object on which to bind, unbind and trigger event
|
||
|
|
// handlers. Note that $({}) works in jQuery 1.4.3+, but because .unbind on
|
||
|
|
// a "plain object" throws errors in older versions of jQuery, an element is
|
||
|
|
// used here.
|
||
|
|
var o = $('<b/>');
|
||
|
|
|
||
|
|
// Subscribe to a topic. Works just like bind, except the passed handler
|
||
|
|
// is wrapped in a function so that the event object can be stripped out.
|
||
|
|
// Even though the event object might be useful, it is unnecessary and
|
||
|
|
// will only complicate things in the future should the user decide to move
|
||
|
|
// to a non-$.event-based pub/sub implementation.
|
||
|
|
$.subscribe = function( topic, fn ) {
|
||
|
|
|
||
|
|
// Call fn, stripping out the 1st argument (the event object).
|
||
|
|
function wrapper() {
|
||
|
|
return fn.apply( this, Array.prototype.slice.call( arguments, 1 ) );
|
||
|
|
}
|
||
|
|
|
||
|
|
// Add .guid property to function to allow it to be easily unbound. Note
|
||
|
|
// that $.guid is new in jQuery 1.4+, and $.event.guid was used before.
|
||
|
|
wrapper.guid = fn.guid = fn.guid || ( $.guid ? $.guid++ : $.event.guid++ );
|
||
|
|
|
||
|
|
// Bind the handler.
|
||
|
|
o.bind( topic, wrapper );
|
||
|
|
};
|
||
|
|
|
||
|
|
// Unsubscribe from a topic. Works exactly like unbind.
|
||
|
|
$.unsubscribe = function() {
|
||
|
|
o.unbind.apply( o, arguments );
|
||
|
|
};
|
||
|
|
|
||
|
|
// Publish a topic. Works exactly like trigger.
|
||
|
|
$.publish = function() {
|
||
|
|
o.trigger.apply( o, arguments );
|
||
|
|
};
|
||
|
|
|
||
|
|
})(jQuery);
|