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/*!
* jquery.event.drop.live - v 2.2
* Copyright (c) 2010 Three Dub Media - http://threedubmedia.com
* Open Source MIT License - http://threedubmedia.com/code/license
*/
// Created: 2010-06-07
// Updated: 2012-05-21
// REQUIRES: jquery 1.7.x, event.drag 2.2, event.drop 2.2
;(function($){ // secure $ jQuery alias
// local refs (increase compression)
var $event = $.event,
// ref the drop special event config
drop = $event.special.drop,
// old drop event add method
origadd = drop.add,
// old drop event teradown method
origteardown = drop.teardown;
// allow events to bubble for delegation
drop.noBubble = false;
// the namespace for internal live events
drop.livekey = "livedrop";
// new drop event add method
drop.add = function( obj ){
// call the old method
origadd.apply( this, arguments );
// read the data
var data = $.data( this, drop.datakey );
// bind the live "dropinit" delegator
if ( !data.live && obj.selector ){
data.live = true;
$event.add( this, "dropinit."+ drop.livekey, drop.delegate );
}
};
// new drop event teardown method
drop.teardown = function(){
// call the old method
origteardown.apply( this, arguments );
// read the data
var data = $.data( this, drop.datakey ) || {};
// remove the live "dropinit" delegator
if ( data.live ){
// remove the "live" delegation
$event.remove( this, "dropinit", drop.delegate );
data.live = false;
}
};
// identify potential delegate elements
drop.delegate = function( event, dd ){
// local refs
var elems = [], $targets,
// element event structure
events = $.data( this, "events" ) || {};
// query live events
$.each( events || [], function( key, arr ){
// no event type matches
if ( key.indexOf("drop") !== 0 )
return;
$.each( arr, function( i, obj ){
// locate the elements to delegate
$targets = $( event.currentTarget ).find( obj.selector );
// no element found
if ( !$targets.length )
return;
// take each target...
$targets.each(function(){
// add an event handler
$event.add( this, obj.origType +'.'+ drop.livekey, obj.origHandler || obj.handler, obj.data );
// remember new elements
if ( $.inArray( this, elems ) < 0 )
elems.push( this );
});
});
});
// may not exist when artifically triggering dropinit event
if ( dd )
// clean-up after the interaction ends
$event.add( dd.drag, "dragend."+drop.livekey, function(){
$.each( elems.concat( this ), function(){
$event.remove( this, '.'+ drop.livekey );
});
});
//drop.delegates.push( elems );
return elems.length ? $( elems ) : false;
};
})( jQuery ); // confine scope
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