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(function( jQuery ) {
jQuery.extend({
queue: function( elem, type, data ) {
if ( !elem ) {
return;
}
type = (type || "fx") + "queue";
var q = jQuery._data( elem, type );
// Speed up dequeue by getting out quickly if this is just a lookup
if ( !data ) {
return q || [];
}
if ( !q || jQuery.isArray(data) ) {
q = jQuery._data( elem, type, jQuery.makeArray(data) );
} else {
q.push( data );
}
return q;
},
dequeue: function( elem, type ) {
type = type || "fx";
var queue = jQuery.queue( elem, type ),
fn = queue.shift(),
defer;
// If the fx queue is dequeued, always remove the progress sentinel
if ( fn === "inprogress" ) {
fn = queue.shift();
}
if ( fn ) {
// Add a progress sentinel to prevent the fx queue from being
// automatically dequeued
if ( type === "fx" ) {
queue.unshift("inprogress");
}
fn.call(elem, function() {
jQuery.dequeue(elem, type);
});
}
if ( !queue.length ) {
jQuery.removeData( elem, type + "queue", true );
// Look if we have observers and resolve if needed
if (( defer = jQuery.data( elem, type + "defer", undefined, true ) )) {
// Give room for hard-coded callbacks to fire first
// and eventually add another animation on the element
setTimeout( function() {
if ( !jQuery.data( elem, type + "queue", undefined, true ) ) {
jQuery.removeData( elem, type + "defer", true );
defer.resolve();
}
}, 0 );
}
}
}
});
jQuery.fn.extend({
queue: function( type, data ) {
if ( typeof type !== "string" ) {
data = type;
type = "fx";
}
if ( data === undefined ) {
return jQuery.queue( this[0], type );
}
return this.each(function( i ) {
var queue = jQuery.queue( this, type, data );
if ( type === "fx" && queue[0] !== "inprogress" ) {
jQuery.dequeue( this, type );
}
});
},
dequeue: function( type ) {
return this.each(function() {
jQuery.dequeue( this, type );
});
},
// Based off of the plugin by Clint Helfers, with permission.
// http://blindsignals.com/index.php/2009/07/jquery-delay/
delay: function( time, type ) {
time = jQuery.fx ? jQuery.fx.speeds[time] || time : time;
type = type || "fx";
return this.queue( type, function() {
var elem = this;
setTimeout(function() {
jQuery.dequeue( elem, type );
}, time );
});
},
clearQueue: function( type ) {
return this.queue( type || "fx", [] );
},
// Get a promise resolved when queues of a certain type
// are emptied (fx is the type by default)
promise: function( type, object ) {
if ( typeof type !== "string" ) {
object = type;
type = undefined;
}
type = type || "fx";
var defer = jQuery.Deferred(),
elements = this,
i = elements.length,
count = 1,
deferDataKey = type + "defer",
queueDataKey = type + "queue";
function resolve() {
if ( !( --count ) ) {
defer.resolveWith( elements, [ elements ] );
}
}
while( i-- ) {
if (( tmp = jQuery.data( elements[ i ], deferDataKey, undefined, true ) ||
jQuery.data( elements[ i ], queueDataKey, undefined, true ) &&
jQuery.data( elements[ i ], deferDataKey, jQuery._Deferred(), true ) )) {
count++;
tmp.done( resolve );
}
}
resolve();
return defer.promise();
}
});
})( jQuery );
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